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/*
* sata_nv . c - NVIDIA nForce SATA
*
* Copyright 2004 NVIDIA Corp . All rights reserved .
* Copyright 2004 Andrew Chew
*
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*
* This program is free software ; you can redistribute it and / or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation ; either version 2 , or ( at your option )
* any later version .
*
* This program is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the
* GNU General Public License for more details .
*
* You should have received a copy of the GNU General Public License
* along with this program ; see the file COPYING . If not , write to
* the Free Software Foundation , 675 Mass Ave , Cambridge , MA 0213 9 , USA .
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*
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*
* libata documentation is available via ' make { ps | pdf } docs ' ,
* as Documentation / DocBook / libata . *
*
* No hardware documentation available outside of NVIDIA .
* This driver programs the NVIDIA SATA controller in a similar
* fashion as with other PCI IDE BMDMA controllers , with a few
* NV - specific details such as register offsets , SATA phy location ,
* hotplug info , etc .
*
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* CK804 / MCP04 controllers support an alternate programming interface
* similar to the ADMA specification ( with some modifications ) .
* This allows the use of NCQ . Non - DMA - mapped ATA commands are still
* sent through the legacy interface .
*
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*/
# include <linux/kernel.h>
# include <linux/module.h>
# include <linux/pci.h>
# include <linux/init.h>
# include <linux/blkdev.h>
# include <linux/delay.h>
# include <linux/interrupt.h>
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# include <linux/device.h>
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# include <scsi/scsi_host.h>
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# include <scsi/scsi_device.h>
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# include <linux/libata.h>
# define DRV_NAME "sata_nv"
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# define DRV_VERSION "3.5"
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# define NV_ADMA_DMA_BOUNDARY 0xffffffffUL
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enum {
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NV_MMIO_BAR = 5 ,
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NV_PORTS = 2 ,
NV_PIO_MASK = 0x1f ,
NV_MWDMA_MASK = 0x07 ,
NV_UDMA_MASK = 0x7f ,
NV_PORT0_SCR_REG_OFFSET = 0x00 ,
NV_PORT1_SCR_REG_OFFSET = 0x40 ,
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/* INT_STATUS/ENABLE */
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NV_INT_STATUS = 0x10 ,
NV_INT_ENABLE = 0x11 ,
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NV_INT_STATUS_CK804 = 0x440 ,
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NV_INT_ENABLE_CK804 = 0x441 ,
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/* INT_STATUS/ENABLE bits */
NV_INT_DEV = 0x01 ,
NV_INT_PM = 0x02 ,
NV_INT_ADDED = 0x04 ,
NV_INT_REMOVED = 0x08 ,
NV_INT_PORT_SHIFT = 4 , /* each port occupies 4 bits */
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NV_INT_ALL = 0x0f ,
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NV_INT_MASK = NV_INT_DEV |
NV_INT_ADDED | NV_INT_REMOVED ,
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/* INT_CONFIG */
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NV_INT_CONFIG = 0x12 ,
NV_INT_CONFIG_METHD = 0x01 , // 0 = INT, 1 = SMI
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// For PCI config register 20
NV_MCP_SATA_CFG_20 = 0x50 ,
NV_MCP_SATA_CFG_20_SATA_SPACE_EN = 0x04 ,
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NV_MCP_SATA_CFG_20_PORT0_EN = ( 1 < < 17 ) ,
NV_MCP_SATA_CFG_20_PORT1_EN = ( 1 < < 16 ) ,
NV_MCP_SATA_CFG_20_PORT0_PWB_EN = ( 1 < < 14 ) ,
NV_MCP_SATA_CFG_20_PORT1_PWB_EN = ( 1 < < 12 ) ,
NV_ADMA_MAX_CPBS = 32 ,
NV_ADMA_CPB_SZ = 128 ,
NV_ADMA_APRD_SZ = 16 ,
NV_ADMA_SGTBL_LEN = ( 1024 - NV_ADMA_CPB_SZ ) /
NV_ADMA_APRD_SZ ,
NV_ADMA_SGTBL_TOTAL_LEN = NV_ADMA_SGTBL_LEN + 5 ,
NV_ADMA_SGTBL_SZ = NV_ADMA_SGTBL_LEN * NV_ADMA_APRD_SZ ,
NV_ADMA_PORT_PRIV_DMA_SZ = NV_ADMA_MAX_CPBS *
( NV_ADMA_CPB_SZ + NV_ADMA_SGTBL_SZ ) ,
/* BAR5 offset to ADMA general registers */
NV_ADMA_GEN = 0x400 ,
NV_ADMA_GEN_CTL = 0x00 ,
NV_ADMA_NOTIFIER_CLEAR = 0x30 ,
/* BAR5 offset to ADMA ports */
NV_ADMA_PORT = 0x480 ,
/* size of ADMA port register space */
NV_ADMA_PORT_SIZE = 0x100 ,
/* ADMA port registers */
NV_ADMA_CTL = 0x40 ,
NV_ADMA_CPB_COUNT = 0x42 ,
NV_ADMA_NEXT_CPB_IDX = 0x43 ,
NV_ADMA_STAT = 0x44 ,
NV_ADMA_CPB_BASE_LOW = 0x48 ,
NV_ADMA_CPB_BASE_HIGH = 0x4C ,
NV_ADMA_APPEND = 0x50 ,
NV_ADMA_NOTIFIER = 0x68 ,
NV_ADMA_NOTIFIER_ERROR = 0x6C ,
/* NV_ADMA_CTL register bits */
NV_ADMA_CTL_HOTPLUG_IEN = ( 1 < < 0 ) ,
NV_ADMA_CTL_CHANNEL_RESET = ( 1 < < 5 ) ,
NV_ADMA_CTL_GO = ( 1 < < 7 ) ,
NV_ADMA_CTL_AIEN = ( 1 < < 8 ) ,
NV_ADMA_CTL_READ_NON_COHERENT = ( 1 < < 11 ) ,
NV_ADMA_CTL_WRITE_NON_COHERENT = ( 1 < < 12 ) ,
/* CPB response flag bits */
NV_CPB_RESP_DONE = ( 1 < < 0 ) ,
NV_CPB_RESP_ATA_ERR = ( 1 < < 3 ) ,
NV_CPB_RESP_CMD_ERR = ( 1 < < 4 ) ,
NV_CPB_RESP_CPB_ERR = ( 1 < < 7 ) ,
/* CPB control flag bits */
NV_CPB_CTL_CPB_VALID = ( 1 < < 0 ) ,
NV_CPB_CTL_QUEUE = ( 1 < < 1 ) ,
NV_CPB_CTL_APRD_VALID = ( 1 < < 2 ) ,
NV_CPB_CTL_IEN = ( 1 < < 3 ) ,
NV_CPB_CTL_FPDMA = ( 1 < < 4 ) ,
/* APRD flags */
NV_APRD_WRITE = ( 1 < < 1 ) ,
NV_APRD_END = ( 1 < < 2 ) ,
NV_APRD_CONT = ( 1 < < 3 ) ,
/* NV_ADMA_STAT flags */
NV_ADMA_STAT_TIMEOUT = ( 1 < < 0 ) ,
NV_ADMA_STAT_HOTUNPLUG = ( 1 < < 1 ) ,
NV_ADMA_STAT_HOTPLUG = ( 1 < < 2 ) ,
NV_ADMA_STAT_CPBERR = ( 1 < < 4 ) ,
NV_ADMA_STAT_SERROR = ( 1 < < 5 ) ,
NV_ADMA_STAT_CMD_COMPLETE = ( 1 < < 6 ) ,
NV_ADMA_STAT_IDLE = ( 1 < < 8 ) ,
NV_ADMA_STAT_LEGACY = ( 1 < < 9 ) ,
NV_ADMA_STAT_STOPPED = ( 1 < < 10 ) ,
NV_ADMA_STAT_DONE = ( 1 < < 12 ) ,
NV_ADMA_STAT_ERR = NV_ADMA_STAT_CPBERR |
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NV_ADMA_STAT_TIMEOUT ,
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/* port flags */
NV_ADMA_PORT_REGISTER_MODE = ( 1 < < 0 ) ,
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NV_ADMA_ATAPI_SETUP_COMPLETE = ( 1 < < 1 ) ,
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/* MCP55 reg offset */
NV_CTL_MCP55 = 0x400 ,
NV_INT_STATUS_MCP55 = 0x440 ,
NV_INT_ENABLE_MCP55 = 0x444 ,
NV_NCQ_REG_MCP55 = 0x448 ,
/* MCP55 */
NV_INT_ALL_MCP55 = 0xffff ,
NV_INT_PORT_SHIFT_MCP55 = 16 , /* each port occupies 16 bits */
NV_INT_MASK_MCP55 = NV_INT_ALL_MCP55 & 0xfffd ,
/* SWNCQ ENABLE BITS*/
NV_CTL_PRI_SWNCQ = 0x02 ,
NV_CTL_SEC_SWNCQ = 0x04 ,
/* SW NCQ status bits*/
NV_SWNCQ_IRQ_DEV = ( 1 < < 0 ) ,
NV_SWNCQ_IRQ_PM = ( 1 < < 1 ) ,
NV_SWNCQ_IRQ_ADDED = ( 1 < < 2 ) ,
NV_SWNCQ_IRQ_REMOVED = ( 1 < < 3 ) ,
NV_SWNCQ_IRQ_BACKOUT = ( 1 < < 4 ) ,
NV_SWNCQ_IRQ_SDBFIS = ( 1 < < 5 ) ,
NV_SWNCQ_IRQ_DHREGFIS = ( 1 < < 6 ) ,
NV_SWNCQ_IRQ_DMASETUP = ( 1 < < 7 ) ,
NV_SWNCQ_IRQ_HOTPLUG = NV_SWNCQ_IRQ_ADDED |
NV_SWNCQ_IRQ_REMOVED ,
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} ;
/* ADMA Physical Region Descriptor - one SG segment */
struct nv_adma_prd {
__le64 addr ;
__le32 len ;
u8 flags ;
u8 packet_len ;
__le16 reserved ;
} ;
enum nv_adma_regbits {
CMDEND = ( 1 < < 15 ) , /* end of command list */
WNB = ( 1 < < 14 ) , /* wait-not-BSY */
IGN = ( 1 < < 13 ) , /* ignore this entry */
CS1n = ( 1 < < ( 4 + 8 ) ) , /* std. PATA signals follow... */
DA2 = ( 1 < < ( 2 + 8 ) ) ,
DA1 = ( 1 < < ( 1 + 8 ) ) ,
DA0 = ( 1 < < ( 0 + 8 ) ) ,
} ;
/* ADMA Command Parameter Block
The first 5 SG segments are stored inside the Command Parameter Block itself .
If there are more than 5 segments the remainder are stored in a separate
memory area indicated by next_aprd . */
struct nv_adma_cpb {
u8 resp_flags ; /* 0 */
u8 reserved1 ; /* 1 */
u8 ctl_flags ; /* 2 */
/* len is length of taskfile in 64 bit words */
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u8 len ; /* 3 */
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u8 tag ; /* 4 */
u8 next_cpb_idx ; /* 5 */
__le16 reserved2 ; /* 6-7 */
__le16 tf [ 12 ] ; /* 8-31 */
struct nv_adma_prd aprd [ 5 ] ; /* 32-111 */
__le64 next_aprd ; /* 112-119 */
__le64 reserved3 ; /* 120-127 */
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} ;
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struct nv_adma_port_priv {
struct nv_adma_cpb * cpb ;
dma_addr_t cpb_dma ;
struct nv_adma_prd * aprd ;
dma_addr_t aprd_dma ;
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void __iomem * ctl_block ;
void __iomem * gen_block ;
void __iomem * notifier_clear_block ;
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u64 adma_dma_mask ;
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u8 flags ;
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int last_issue_ncq ;
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} ;
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struct nv_host_priv {
unsigned long type ;
} ;
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struct defer_queue {
u32 defer_bits ;
unsigned int head ;
unsigned int tail ;
unsigned int tag [ ATA_MAX_QUEUE ] ;
} ;
enum ncq_saw_flag_list {
ncq_saw_d2h = ( 1U < < 0 ) ,
ncq_saw_dmas = ( 1U < < 1 ) ,
ncq_saw_sdb = ( 1U < < 2 ) ,
ncq_saw_backout = ( 1U < < 3 ) ,
} ;
struct nv_swncq_port_priv {
struct ata_prd * prd ; /* our SG list */
dma_addr_t prd_dma ; /* and its DMA mapping */
void __iomem * sactive_block ;
void __iomem * irq_block ;
void __iomem * tag_block ;
u32 qc_active ;
unsigned int last_issue_tag ;
/* fifo circular queue to store deferral command */
struct defer_queue defer_queue ;
/* for NCQ interrupt analysis */
u32 dhfis_bits ;
u32 dmafis_bits ;
u32 sdbfis_bits ;
unsigned int ncq_flags ;
} ;
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# define NV_ADMA_CHECK_INTR(GCTL, PORT) ((GCTL) & (1 << (19 + (12 * (PORT)))))
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static int nv_init_one ( struct pci_dev * pdev , const struct pci_device_id * ent ) ;
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# ifdef CONFIG_PM
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static int nv_pci_device_resume ( struct pci_dev * pdev ) ;
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# endif
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static void nv_ck804_host_stop ( struct ata_host * host ) ;
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
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static irqreturn_t nv_generic_interrupt ( int irq , void * dev_instance ) ;
static irqreturn_t nv_nf2_interrupt ( int irq , void * dev_instance ) ;
static irqreturn_t nv_ck804_interrupt ( int irq , void * dev_instance ) ;
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static int nv_scr_read ( struct ata_link * link , unsigned int sc_reg , u32 * val ) ;
static int nv_scr_write ( struct ata_link * link , unsigned int sc_reg , u32 val ) ;
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static int nv_noclassify_hardreset ( struct ata_link * link , unsigned int * class ,
unsigned long deadline ) ;
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static void nv_nf2_freeze ( struct ata_port * ap ) ;
static void nv_nf2_thaw ( struct ata_port * ap ) ;
static void nv_ck804_freeze ( struct ata_port * ap ) ;
static void nv_ck804_thaw ( struct ata_port * ap ) ;
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static int nv_adma_slave_config ( struct scsi_device * sdev ) ;
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static int nv_adma_check_atapi_dma ( struct ata_queued_cmd * qc ) ;
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static void nv_adma_qc_prep ( struct ata_queued_cmd * qc ) ;
static unsigned int nv_adma_qc_issue ( struct ata_queued_cmd * qc ) ;
static irqreturn_t nv_adma_interrupt ( int irq , void * dev_instance ) ;
static void nv_adma_irq_clear ( struct ata_port * ap ) ;
static int nv_adma_port_start ( struct ata_port * ap ) ;
static void nv_adma_port_stop ( struct ata_port * ap ) ;
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# ifdef CONFIG_PM
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static int nv_adma_port_suspend ( struct ata_port * ap , pm_message_t mesg ) ;
static int nv_adma_port_resume ( struct ata_port * ap ) ;
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# endif
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static void nv_adma_freeze ( struct ata_port * ap ) ;
static void nv_adma_thaw ( struct ata_port * ap ) ;
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static void nv_adma_error_handler ( struct ata_port * ap ) ;
static void nv_adma_host_stop ( struct ata_host * host ) ;
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static void nv_adma_post_internal_cmd ( struct ata_queued_cmd * qc ) ;
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static void nv_adma_tf_read ( struct ata_port * ap , struct ata_taskfile * tf ) ;
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static void nv_mcp55_thaw ( struct ata_port * ap ) ;
static void nv_mcp55_freeze ( struct ata_port * ap ) ;
static void nv_swncq_error_handler ( struct ata_port * ap ) ;
static int nv_swncq_slave_config ( struct scsi_device * sdev ) ;
static int nv_swncq_port_start ( struct ata_port * ap ) ;
static void nv_swncq_qc_prep ( struct ata_queued_cmd * qc ) ;
static void nv_swncq_fill_sg ( struct ata_queued_cmd * qc ) ;
static unsigned int nv_swncq_qc_issue ( struct ata_queued_cmd * qc ) ;
static void nv_swncq_irq_clear ( struct ata_port * ap , u16 fis ) ;
static irqreturn_t nv_swncq_interrupt ( int irq , void * dev_instance ) ;
# ifdef CONFIG_PM
static int nv_swncq_port_suspend ( struct ata_port * ap , pm_message_t mesg ) ;
static int nv_swncq_port_resume ( struct ata_port * ap ) ;
# endif
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enum nv_host_type
{
GENERIC ,
NFORCE2 ,
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NFORCE3 = NFORCE2 , /* NF2 == NF3 as far as sata_nv is concerned */
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CK804 ,
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ADMA ,
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MCP5x ,
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SWNCQ ,
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} ;
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static const struct pci_device_id nv_pci_tbl [ ] = {
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{ PCI_VDEVICE ( NVIDIA , PCI_DEVICE_ID_NVIDIA_NFORCE2S_SATA ) , NFORCE2 } ,
{ PCI_VDEVICE ( NVIDIA , PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA ) , NFORCE3 } ,
{ PCI_VDEVICE ( NVIDIA , PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA2 ) , NFORCE3 } ,
{ PCI_VDEVICE ( NVIDIA , PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_SATA ) , CK804 } ,
{ PCI_VDEVICE ( NVIDIA , PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_SATA2 ) , CK804 } ,
{ PCI_VDEVICE ( NVIDIA , PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_SATA ) , CK804 } ,
{ PCI_VDEVICE ( NVIDIA , PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_SATA2 ) , CK804 } ,
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{ PCI_VDEVICE ( NVIDIA , PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA ) , MCP5x } ,
{ PCI_VDEVICE ( NVIDIA , PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA2 ) , MCP5x } ,
{ PCI_VDEVICE ( NVIDIA , PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA ) , MCP5x } ,
{ PCI_VDEVICE ( NVIDIA , PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA2 ) , MCP5x } ,
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{ PCI_VDEVICE ( NVIDIA , PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA ) , GENERIC } ,
{ PCI_VDEVICE ( NVIDIA , PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA2 ) , GENERIC } ,
{ PCI_VDEVICE ( NVIDIA , PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA3 ) , GENERIC } ,
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{ } /* terminate list */
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} ;
static struct pci_driver nv_pci_driver = {
. name = DRV_NAME ,
. id_table = nv_pci_tbl ,
. probe = nv_init_one ,
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# ifdef CONFIG_PM
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. suspend = ata_pci_device_suspend ,
. resume = nv_pci_device_resume ,
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# endif
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. remove = ata_pci_remove_one ,
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} ;
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static struct scsi_host_template nv_sht = {
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ATA_BMDMA_SHT ( DRV_NAME ) ,
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} ;
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static struct scsi_host_template nv_adma_sht = {
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ATA_NCQ_SHT ( DRV_NAME ) ,
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. can_queue = NV_ADMA_MAX_CPBS ,
. sg_tablesize = NV_ADMA_SGTBL_TOTAL_LEN ,
. dma_boundary = NV_ADMA_DMA_BOUNDARY ,
. slave_configure = nv_adma_slave_config ,
} ;
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static struct scsi_host_template nv_swncq_sht = {
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ATA_NCQ_SHT ( DRV_NAME ) ,
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. can_queue = ATA_MAX_QUEUE ,
. sg_tablesize = LIBATA_MAX_PRD ,
. dma_boundary = ATA_DMA_BOUNDARY ,
. slave_configure = nv_swncq_slave_config ,
} ;
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static struct ata_port_operations nv_common_ops = {
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 06:22:49 +03:00
. inherits = & ata_bmdma_port_ops ,
2005-04-17 02:20:36 +04:00
. scr_read = nv_scr_read ,
. scr_write = nv_scr_write ,
} ;
2008-09-28 02:39:01 +04:00
/* OSDL bz11195 reports that link doesn't come online after hardreset
* on generic nv ' s and there have been several other similar reports
* on linux - ide . Disable hardreset for generic nv ' s .
*/
static struct ata_port_operations nv_generic_ops = {
. inherits = & nv_common_ops ,
. hardreset = ATA_OP_NULL ,
} ;
2008-11-03 06:37:49 +03:00
/* OSDL bz3352 reports that nf2/3 controllers can't determine device
* signature reliably . Also , the following thread reports detection
* failure on cold boot with the standard debouncing timing .
*
* http : //thread.gmane.org/gmane.linux.ide/34098
*
* Debounce with hotplug timing and request follow - up SRST .
*/
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 06:22:49 +03:00
static struct ata_port_operations nv_nf2_ops = {
2008-09-28 02:39:01 +04:00
. inherits = & nv_common_ops ,
2006-06-17 10:49:56 +04:00
. freeze = nv_nf2_freeze ,
. thaw = nv_nf2_thaw ,
2009-01-25 05:25:22 +03:00
. hardreset = nv_noclassify_hardreset ,
2006-06-17 10:49:56 +04:00
} ;
2009-02-01 04:56:31 +03:00
/* For initial probing after boot and hot plugging, hardreset mostly
* works fine on CK804 but curiously , reprobing on the initial port by
* rescanning or rmmod / insmod fails to acquire the initial D2H Reg FIS
* in somewhat undeterministic way . Use noclassify hardreset .
*/
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 06:22:49 +03:00
static struct ata_port_operations nv_ck804_ops = {
2008-09-28 02:39:01 +04:00
. inherits = & nv_common_ops ,
2006-06-17 10:49:56 +04:00
. freeze = nv_ck804_freeze ,
. thaw = nv_ck804_thaw ,
2009-02-01 04:56:31 +03:00
. hardreset = nv_noclassify_hardreset ,
2006-06-17 10:49:56 +04:00
. host_stop = nv_ck804_host_stop ,
} ;
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 06:22:49 +03:00
static struct ata_port_operations nv_adma_ops = {
2008-11-03 06:37:49 +03:00
. inherits = & nv_ck804_ops ,
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 06:22:49 +03:00
2006-11-26 23:20:19 +03:00
. check_atapi_dma = nv_adma_check_atapi_dma ,
2008-04-07 17:47:16 +04:00
. sff_tf_read = nv_adma_tf_read ,
2007-09-23 08:14:12 +04:00
. qc_defer = ata_std_qc_defer ,
2006-10-28 06:08:41 +04:00
. qc_prep = nv_adma_qc_prep ,
. qc_issue = nv_adma_qc_issue ,
2008-04-07 17:47:16 +04:00
. sff_irq_clear = nv_adma_irq_clear ,
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 06:22:49 +03:00
2007-05-06 01:36:36 +04:00
. freeze = nv_adma_freeze ,
. thaw = nv_adma_thaw ,
2006-10-28 06:08:41 +04:00
. error_handler = nv_adma_error_handler ,
2007-02-21 06:49:10 +03:00
. post_internal_cmd = nv_adma_post_internal_cmd ,
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 06:22:49 +03:00
2006-10-28 06:08:41 +04:00
. port_start = nv_adma_port_start ,
. port_stop = nv_adma_port_stop ,
2007-03-02 11:31:26 +03:00
# ifdef CONFIG_PM
2007-01-04 03:13:57 +03:00
. port_suspend = nv_adma_port_suspend ,
. port_resume = nv_adma_port_resume ,
2007-03-02 11:31:26 +03:00
# endif
2006-10-28 06:08:41 +04:00
. host_stop = nv_adma_host_stop ,
} ;
2009-01-25 05:29:38 +03:00
/* Kernel bz#12351 reports that when SWNCQ is enabled, for hotplug to
* work , hardreset should be used and hardreset can ' t report proper
* signature , which suggests that mcp5x is closer to nf2 as long as
* reset quirkiness is concerned . Define separate ops for mcp5x with
* nv_noclassify_hardreset ( ) .
*/
static struct ata_port_operations nv_mcp5x_ops = {
. inherits = & nv_common_ops ,
. hardreset = nv_noclassify_hardreset ,
} ;
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 06:22:49 +03:00
static struct ata_port_operations nv_swncq_ops = {
2009-01-25 05:29:38 +03:00
. inherits = & nv_mcp5x_ops ,
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 06:22:49 +03:00
2007-10-15 23:16:53 +04:00
. qc_defer = ata_std_qc_defer ,
. qc_prep = nv_swncq_qc_prep ,
. qc_issue = nv_swncq_qc_issue ,
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 06:22:49 +03:00
2007-10-15 23:16:53 +04:00
. freeze = nv_mcp55_freeze ,
. thaw = nv_mcp55_thaw ,
. error_handler = nv_swncq_error_handler ,
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 06:22:49 +03:00
2007-10-15 23:16:53 +04:00
# ifdef CONFIG_PM
. port_suspend = nv_swncq_port_suspend ,
. port_resume = nv_swncq_port_resume ,
# endif
. port_start = nv_swncq_port_start ,
} ;
2008-03-25 06:22:49 +03:00
struct nv_pi_priv {
irq_handler_t irq_handler ;
struct scsi_host_template * sht ;
} ;
# define NV_PI_PRIV(_irq_handler, _sht) \
& ( struct nv_pi_priv ) { . irq_handler = _irq_handler , . sht = _sht }
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static const struct ata_port_info nv_port_info [ ] = {
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/* generic */
{
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. flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY ,
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. pio_mask = NV_PIO_MASK ,
. mwdma_mask = NV_MWDMA_MASK ,
. udma_mask = NV_UDMA_MASK ,
. port_ops = & nv_generic_ops ,
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. private_data = NV_PI_PRIV ( nv_generic_interrupt , & nv_sht ) ,
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} ,
/* nforce2/3 */
{
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. flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY ,
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. pio_mask = NV_PIO_MASK ,
. mwdma_mask = NV_MWDMA_MASK ,
. udma_mask = NV_UDMA_MASK ,
. port_ops = & nv_nf2_ops ,
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. private_data = NV_PI_PRIV ( nv_nf2_interrupt , & nv_sht ) ,
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} ,
/* ck804 */
{
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. flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY ,
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. pio_mask = NV_PIO_MASK ,
. mwdma_mask = NV_MWDMA_MASK ,
. udma_mask = NV_UDMA_MASK ,
. port_ops = & nv_ck804_ops ,
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. private_data = NV_PI_PRIV ( nv_ck804_interrupt , & nv_sht ) ,
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} ,
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/* ADMA */
{
. flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_MMIO | ATA_FLAG_NCQ ,
. pio_mask = NV_PIO_MASK ,
. mwdma_mask = NV_MWDMA_MASK ,
. udma_mask = NV_UDMA_MASK ,
. port_ops = & nv_adma_ops ,
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. private_data = NV_PI_PRIV ( nv_adma_interrupt , & nv_adma_sht ) ,
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} ,
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/* MCP5x */
{
. flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY ,
. pio_mask = NV_PIO_MASK ,
. mwdma_mask = NV_MWDMA_MASK ,
. udma_mask = NV_UDMA_MASK ,
. port_ops = & nv_mcp5x_ops ,
. private_data = NV_PI_PRIV ( nv_generic_interrupt , & nv_sht ) ,
} ,
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/* SWNCQ */
{
. flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_NCQ ,
. pio_mask = NV_PIO_MASK ,
. mwdma_mask = NV_MWDMA_MASK ,
. udma_mask = NV_UDMA_MASK ,
. port_ops = & nv_swncq_ops ,
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. private_data = NV_PI_PRIV ( nv_swncq_interrupt , & nv_swncq_sht ) ,
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} ,
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} ;
MODULE_AUTHOR ( " NVIDIA " ) ;
MODULE_DESCRIPTION ( " low-level driver for NVIDIA nForce SATA controller " ) ;
MODULE_LICENSE ( " GPL " ) ;
MODULE_DEVICE_TABLE ( pci , nv_pci_tbl ) ;
MODULE_VERSION ( DRV_VERSION ) ;
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static int adma_enabled ;
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static int swncq_enabled = 1 ;
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static void nv_adma_register_mode ( struct ata_port * ap )
{
struct nv_adma_port_priv * pp = ap - > private_data ;
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void __iomem * mmio = pp - > ctl_block ;
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u16 tmp , status ;
int count = 0 ;
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if ( pp - > flags & NV_ADMA_PORT_REGISTER_MODE )
return ;
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status = readw ( mmio + NV_ADMA_STAT ) ;
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while ( ! ( status & NV_ADMA_STAT_IDLE ) & & count < 20 ) {
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ndelay ( 50 ) ;
status = readw ( mmio + NV_ADMA_STAT ) ;
count + + ;
}
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if ( count = = 20 )
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ata_port_printk ( ap , KERN_WARNING ,
" timeout waiting for ADMA IDLE, stat=0x%hx \n " ,
status ) ;
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tmp = readw ( mmio + NV_ADMA_CTL ) ;
writew ( tmp & ~ NV_ADMA_CTL_GO , mmio + NV_ADMA_CTL ) ;
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count = 0 ;
status = readw ( mmio + NV_ADMA_STAT ) ;
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while ( ! ( status & NV_ADMA_STAT_LEGACY ) & & count < 20 ) {
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ndelay ( 50 ) ;
status = readw ( mmio + NV_ADMA_STAT ) ;
count + + ;
}
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if ( count = = 20 )
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ata_port_printk ( ap , KERN_WARNING ,
" timeout waiting for ADMA LEGACY, stat=0x%hx \n " ,
status ) ;
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pp - > flags | = NV_ADMA_PORT_REGISTER_MODE ;
}
static void nv_adma_mode ( struct ata_port * ap )
{
struct nv_adma_port_priv * pp = ap - > private_data ;
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void __iomem * mmio = pp - > ctl_block ;
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u16 tmp , status ;
int count = 0 ;
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if ( ! ( pp - > flags & NV_ADMA_PORT_REGISTER_MODE ) )
return ;
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2006-11-26 23:20:19 +03:00
WARN_ON ( pp - > flags & NV_ADMA_ATAPI_SETUP_COMPLETE ) ;
tmp = readw ( mmio + NV_ADMA_CTL ) ;
writew ( tmp | NV_ADMA_CTL_GO , mmio + NV_ADMA_CTL ) ;
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status = readw ( mmio + NV_ADMA_STAT ) ;
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while ( ( ( status & NV_ADMA_STAT_LEGACY ) | |
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! ( status & NV_ADMA_STAT_IDLE ) ) & & count < 20 ) {
ndelay ( 50 ) ;
status = readw ( mmio + NV_ADMA_STAT ) ;
count + + ;
}
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if ( count = = 20 )
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ata_port_printk ( ap , KERN_WARNING ,
" timeout waiting for ADMA LEGACY clear and IDLE, stat=0x%hx \n " ,
status ) ;
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pp - > flags & = ~ NV_ADMA_PORT_REGISTER_MODE ;
}
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static int nv_adma_slave_config ( struct scsi_device * sdev )
{
struct ata_port * ap = ata_shost_to_port ( sdev - > host ) ;
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struct nv_adma_port_priv * pp = ap - > private_data ;
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struct nv_adma_port_priv * port0 , * port1 ;
struct scsi_device * sdev0 , * sdev1 ;
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struct pci_dev * pdev = to_pci_dev ( ap - > host - > dev ) ;
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unsigned long segment_boundary , flags ;
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unsigned short sg_tablesize ;
int rc ;
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int adma_enable ;
u32 current_reg , new_reg , config_mask ;
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rc = ata_scsi_slave_config ( sdev ) ;
if ( sdev - > id > = ATA_MAX_DEVICES | | sdev - > channel | | sdev - > lun )
/* Not a proper libata device, ignore */
return rc ;
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spin_lock_irqsave ( ap - > lock , flags ) ;
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if ( ap - > link . device [ sdev - > id ] . class = = ATA_DEV_ATAPI ) {
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/*
* NVIDIA reports that ADMA mode does not support ATAPI commands .
* Therefore ATAPI commands are sent through the legacy interface .
* However , the legacy interface only supports 32 - bit DMA .
* Restrict DMA parameters as required by the legacy interface
* when an ATAPI device is connected .
*/
segment_boundary = ATA_DMA_BOUNDARY ;
/* Subtract 1 since an extra entry may be needed for padding, see
libata - scsi . c */
sg_tablesize = LIBATA_MAX_PRD - 1 ;
2006-12-11 19:14:06 +03:00
2006-11-26 23:20:19 +03:00
/* Since the legacy DMA engine is in use, we need to disable ADMA
on the port . */
adma_enable = 0 ;
nv_adma_register_mode ( ap ) ;
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} else {
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segment_boundary = NV_ADMA_DMA_BOUNDARY ;
sg_tablesize = NV_ADMA_SGTBL_TOTAL_LEN ;
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adma_enable = 1 ;
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}
2006-12-11 19:14:06 +03:00
2006-11-26 23:20:19 +03:00
pci_read_config_dword ( pdev , NV_MCP_SATA_CFG_20 , & current_reg ) ;
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if ( ap - > port_no = = 1 )
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config_mask = NV_MCP_SATA_CFG_20_PORT1_EN |
NV_MCP_SATA_CFG_20_PORT1_PWB_EN ;
else
config_mask = NV_MCP_SATA_CFG_20_PORT0_EN |
NV_MCP_SATA_CFG_20_PORT0_PWB_EN ;
2006-12-11 19:14:06 +03:00
2007-10-19 14:42:56 +04:00
if ( adma_enable ) {
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new_reg = current_reg | config_mask ;
pp - > flags & = ~ NV_ADMA_ATAPI_SETUP_COMPLETE ;
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} else {
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new_reg = current_reg & ~ config_mask ;
pp - > flags | = NV_ADMA_ATAPI_SETUP_COMPLETE ;
}
2006-12-11 19:14:06 +03:00
2007-10-19 14:42:56 +04:00
if ( current_reg ! = new_reg )
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pci_write_config_dword ( pdev , NV_MCP_SATA_CFG_20 , new_reg ) ;
2006-12-11 19:14:06 +03:00
2008-02-05 04:39:02 +03:00
port0 = ap - > host - > ports [ 0 ] - > private_data ;
port1 = ap - > host - > ports [ 1 ] - > private_data ;
sdev0 = ap - > host - > ports [ 0 ] - > link . device [ 0 ] . sdev ;
sdev1 = ap - > host - > ports [ 1 ] - > link . device [ 0 ] . sdev ;
if ( ( port0 - > flags & NV_ADMA_ATAPI_SETUP_COMPLETE ) | |
( port1 - > flags & NV_ADMA_ATAPI_SETUP_COMPLETE ) ) {
/** We have to set the DMA mask to 32-bit if either port is in
ATAPI mode , since they are on the same PCI device which is
used for DMA mapping . If we set the mask we also need to set
the bounce limit on both ports to ensure that the block
layer doesn ' t feed addresses that cause DMA mapping to
choke . If either SCSI device is not allocated yet , it ' s OK
since that port will discover its correct setting when it
does get allocated .
Note : Setting 32 - bit mask should not fail . */
if ( sdev0 )
blk_queue_bounce_limit ( sdev0 - > request_queue ,
ATA_DMA_MASK ) ;
if ( sdev1 )
blk_queue_bounce_limit ( sdev1 - > request_queue ,
ATA_DMA_MASK ) ;
pci_set_dma_mask ( pdev , ATA_DMA_MASK ) ;
} else {
/** This shouldn't fail as it was set to this value before */
pci_set_dma_mask ( pdev , pp - > adma_dma_mask ) ;
if ( sdev0 )
blk_queue_bounce_limit ( sdev0 - > request_queue ,
pp - > adma_dma_mask ) ;
if ( sdev1 )
blk_queue_bounce_limit ( sdev1 - > request_queue ,
pp - > adma_dma_mask ) ;
}
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blk_queue_segment_boundary ( sdev - > request_queue , segment_boundary ) ;
blk_queue_max_hw_segments ( sdev - > request_queue , sg_tablesize ) ;
ata_port_printk ( ap , KERN_INFO ,
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" DMA mask 0x%llX, segment boundary 0x%lX, hw segs %hu \n " ,
( unsigned long long ) * ap - > host - > dev - > dma_mask ,
segment_boundary , sg_tablesize ) ;
spin_unlock_irqrestore ( ap - > lock , flags ) ;
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return rc ;
}
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static int nv_adma_check_atapi_dma ( struct ata_queued_cmd * qc )
{
struct nv_adma_port_priv * pp = qc - > ap - > private_data ;
return ! ( pp - > flags & NV_ADMA_ATAPI_SETUP_COMPLETE ) ;
}
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static void nv_adma_tf_read ( struct ata_port * ap , struct ata_taskfile * tf )
{
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/* Other than when internal or pass-through commands are executed,
the only time this function will be called in ADMA mode will be
if a command fails . In the failure case we don ' t care about going
into register mode with ADMA commands pending , as the commands will
all shortly be aborted anyway . We assume that NCQ commands are not
issued via passthrough , which is the only way that switching into
ADMA mode could abort outstanding commands . */
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nv_adma_register_mode ( ap ) ;
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ata_sff_tf_read ( ap , tf ) ;
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}
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static unsigned int nv_adma_tf_to_cpb ( struct ata_taskfile * tf , __le16 * cpb )
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{
unsigned int idx = 0 ;
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if ( tf - > flags & ATA_TFLAG_ISADDR ) {
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if ( tf - > flags & ATA_TFLAG_LBA48 ) {
cpb [ idx + + ] = cpu_to_le16 ( ( ATA_REG_ERR < < 8 ) | tf - > hob_feature | WNB ) ;
cpb [ idx + + ] = cpu_to_le16 ( ( ATA_REG_NSECT < < 8 ) | tf - > hob_nsect ) ;
cpb [ idx + + ] = cpu_to_le16 ( ( ATA_REG_LBAL < < 8 ) | tf - > hob_lbal ) ;
cpb [ idx + + ] = cpu_to_le16 ( ( ATA_REG_LBAM < < 8 ) | tf - > hob_lbam ) ;
cpb [ idx + + ] = cpu_to_le16 ( ( ATA_REG_LBAH < < 8 ) | tf - > hob_lbah ) ;
cpb [ idx + + ] = cpu_to_le16 ( ( ATA_REG_ERR < < 8 ) | tf - > feature ) ;
} else
cpb [ idx + + ] = cpu_to_le16 ( ( ATA_REG_ERR < < 8 ) | tf - > feature | WNB ) ;
2007-02-26 13:51:33 +03:00
2007-02-20 04:02:46 +03:00
cpb [ idx + + ] = cpu_to_le16 ( ( ATA_REG_NSECT < < 8 ) | tf - > nsect ) ;
cpb [ idx + + ] = cpu_to_le16 ( ( ATA_REG_LBAL < < 8 ) | tf - > lbal ) ;
cpb [ idx + + ] = cpu_to_le16 ( ( ATA_REG_LBAM < < 8 ) | tf - > lbam ) ;
cpb [ idx + + ] = cpu_to_le16 ( ( ATA_REG_LBAH < < 8 ) | tf - > lbah ) ;
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}
2007-02-26 13:51:33 +03:00
2007-10-19 14:42:56 +04:00
if ( tf - > flags & ATA_TFLAG_DEVICE )
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cpb [ idx + + ] = cpu_to_le16 ( ( ATA_REG_DEVICE < < 8 ) | tf - > device ) ;
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cpb [ idx + + ] = cpu_to_le16 ( ( ATA_REG_CMD < < 8 ) | tf - > command | CMDEND ) ;
2007-02-26 13:51:33 +03:00
2007-10-19 14:42:56 +04:00
while ( idx < 12 )
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cpb [ idx + + ] = cpu_to_le16 ( IGN ) ;
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return idx ;
}
2007-02-06 03:26:01 +03:00
static int nv_adma_check_cpb ( struct ata_port * ap , int cpb_num , int force_err )
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{
struct nv_adma_port_priv * pp = ap - > private_data ;
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u8 flags = pp - > cpb [ cpb_num ] . resp_flags ;
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VPRINTK ( " CPB %d, flags=0x%x \n " , cpb_num , flags ) ;
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if ( unlikely ( ( force_err | |
flags & ( NV_CPB_RESP_ATA_ERR |
NV_CPB_RESP_CMD_ERR |
NV_CPB_RESP_CPB_ERR ) ) ) ) {
2007-08-06 13:36:22 +04:00
struct ata_eh_info * ehi = & ap - > link . eh_info ;
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int freeze = 0 ;
ata_ehi_clear_desc ( ehi ) ;
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__ata_ehi_push_desc ( ehi , " CPB resp_flags 0x%x: " , flags ) ;
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if ( flags & NV_CPB_RESP_ATA_ERR ) {
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ata_ehi_push_desc ( ehi , " ATA error " ) ;
2007-02-06 03:26:01 +03:00
ehi - > err_mask | = AC_ERR_DEV ;
} else if ( flags & NV_CPB_RESP_CMD_ERR ) {
2007-07-16 09:29:39 +04:00
ata_ehi_push_desc ( ehi , " CMD error " ) ;
2007-02-06 03:26:01 +03:00
ehi - > err_mask | = AC_ERR_DEV ;
} else if ( flags & NV_CPB_RESP_CPB_ERR ) {
2007-07-16 09:29:39 +04:00
ata_ehi_push_desc ( ehi , " CPB error " ) ;
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ehi - > err_mask | = AC_ERR_SYSTEM ;
freeze = 1 ;
} else {
/* notifier error, but no error in CPB flags? */
2007-07-16 09:29:39 +04:00
ata_ehi_push_desc ( ehi , " unknown " ) ;
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ehi - > err_mask | = AC_ERR_OTHER ;
freeze = 1 ;
}
/* Kill all commands. EH will determine what actually failed. */
if ( freeze )
ata_port_freeze ( ap ) ;
else
ata_port_abort ( ap ) ;
return 1 ;
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}
2007-02-06 03:26:01 +03:00
2007-03-27 09:43:36 +04:00
if ( likely ( flags & NV_CPB_RESP_DONE ) ) {
2006-10-28 06:08:41 +04:00
struct ata_queued_cmd * qc = ata_qc_from_tag ( ap , cpb_num ) ;
2007-02-06 03:26:01 +03:00
VPRINTK ( " CPB flags done, flags=0x%x \n " , flags ) ;
if ( likely ( qc ) ) {
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DPRINTK ( " Completing qc from tag %d \n " , cpb_num ) ;
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ata_qc_complete ( qc ) ;
2007-02-22 08:53:03 +03:00
} else {
2007-08-06 13:36:22 +04:00
struct ata_eh_info * ehi = & ap - > link . eh_info ;
2007-02-22 08:53:03 +03:00
/* Notifier bits set without a command may indicate the drive
is misbehaving . Raise host state machine violation on this
condition . */
2007-10-26 08:03:37 +04:00
ata_port_printk ( ap , KERN_ERR ,
" notifier for tag %d with no cmd? \n " ,
cpb_num ) ;
2007-02-22 08:53:03 +03:00
ehi - > err_mask | = AC_ERR_HSM ;
libata: prefer hardreset
When both soft and hard resets are available, libata preferred
softreset till now. The logic behind it was to be softer to devices;
however, this doesn't really help much. Rationales for the change:
* BIOS may freeze lock certain things during boot and softreset can't
unlock those. This by itself is okay but during operation PHY event
or other error conditions can trigger hardreset and the device may
end up with different configuration.
For example, after a hardreset, previously unlockable HPA can be
unlocked resulting in different device size and thus revalidation
failure. Similar condition can occur during or after resume.
* Certain ATAPI devices require hardreset to recover after certain
error conditions. On PATA, this is done by issuing the DEVICE RESET
command. On SATA, COMRESET has equivalent effect. The problem is
that DEVICE RESET needs its own execution protocol.
For SFF controllers with bare TF access, it can be easily
implemented but more advanced controllers (e.g. ahci and sata_sil24)
require specialized implementations. Simply using hardreset solves
the problem nicely.
* COMRESET initialization sequence is the norm in SATA land and many
SATA devices don't work properly if only SRST is used. For example,
some PMPs behave this way and libata works around by always issuing
hardreset if the host supports PMP.
Like the above example, libata has developed a number of mechanisms
aiming to promote softreset to hardreset if softreset is not going
to work. This approach is time consuming and error prone.
Also, note that, dependingon how you read the specs, it could be
argued that PMP fan-out ports require COMRESET to start operation.
In fact, all the PMPs on the market except one don't work properly
if COMRESET is not issued to fan-out ports after PMP reset.
* COMRESET is an integral part of SATA connection and any working
device should be able to handle COMRESET properly. After all, it's
the way to signal hardreset during reboot. This is the most used
and recommended (at least by the ahci spec) method of resetting
devices.
So, this patch makes libata prefer hardreset over softreset by making
the following changes.
* Rename ATA_EH_RESET_MASK to ATA_EH_RESET and use it whereever
ATA_EH_{SOFT|HARD}RESET used to be used. ATA_EH_{SOFT|HARD}RESET is
now only used to tell prereset whether soft or hard reset will be
issued.
* Strip out now unneeded promote-to-hardreset logics from
ata_eh_reset(), ata_std_prereset(), sata_pmp_std_prereset() and
other places.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-01-23 18:05:14 +03:00
ehi - > action | = ATA_EH_RESET ;
2007-02-22 08:53:03 +03:00
ata_port_freeze ( ap ) ;
return 1 ;
2006-10-28 06:08:41 +04:00
}
}
2007-02-06 03:26:01 +03:00
return 0 ;
2006-10-28 06:08:41 +04:00
}
2006-11-26 23:20:19 +03:00
static int nv_host_intr ( struct ata_port * ap , u8 irq_stat )
{
2007-08-06 13:36:22 +04:00
struct ata_queued_cmd * qc = ata_qc_from_tag ( ap , ap - > link . active_tag ) ;
2006-11-26 23:20:19 +03:00
/* freeze if hotplugged */
if ( unlikely ( irq_stat & ( NV_INT_ADDED | NV_INT_REMOVED ) ) ) {
ata_port_freeze ( ap ) ;
return 1 ;
}
/* bail out if not our interrupt */
if ( ! ( irq_stat & NV_INT_DEV ) )
return 0 ;
/* DEV interrupt w/ no active qc? */
if ( unlikely ( ! qc | | ( qc - > tf . flags & ATA_TFLAG_POLLING ) ) ) {
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ata_sff_check_status ( ap ) ;
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return 1 ;
}
/* handle interrupt */
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return ata_sff_host_intr ( ap , qc ) ;
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}
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static irqreturn_t nv_adma_interrupt ( int irq , void * dev_instance )
{
struct ata_host * host = dev_instance ;
int i , handled = 0 ;
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u32 notifier_clears [ 2 ] ;
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spin_lock ( & host - > lock ) ;
for ( i = 0 ; i < host - > n_ports ; i + + ) {
struct ata_port * ap = host - > ports [ i ] ;
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notifier_clears [ i ] = 0 ;
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if ( ap & & ! ( ap - > flags & ATA_FLAG_DISABLED ) ) {
struct nv_adma_port_priv * pp = ap - > private_data ;
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void __iomem * mmio = pp - > ctl_block ;
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u16 status ;
u32 gen_ctl ;
u32 notifier , notifier_error ;
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/* if ADMA is disabled, use standard ata interrupt handler */
if ( pp - > flags & NV_ADMA_ATAPI_SETUP_COMPLETE ) {
u8 irq_stat = readb ( host - > iomap [ NV_MMIO_BAR ] + NV_INT_STATUS_CK804 )
> > ( NV_INT_PORT_SHIFT * i ) ;
handled + = nv_host_intr ( ap , irq_stat ) ;
continue ;
}
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/* if in ATA register mode, check for standard interrupts */
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if ( pp - > flags & NV_ADMA_PORT_REGISTER_MODE ) {
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u8 irq_stat = readb ( host - > iomap [ NV_MMIO_BAR ] + NV_INT_STATUS_CK804 )
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> > ( NV_INT_PORT_SHIFT * i ) ;
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if ( ata_tag_valid ( ap - > link . active_tag ) )
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/** NV_INT_DEV indication seems unreliable at times
at least in ADMA mode . Force it on always when a
command is active , to prevent losing interrupts . */
irq_stat | = NV_INT_DEV ;
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handled + = nv_host_intr ( ap , irq_stat ) ;
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}
notifier = readl ( mmio + NV_ADMA_NOTIFIER ) ;
notifier_error = readl ( mmio + NV_ADMA_NOTIFIER_ERROR ) ;
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notifier_clears [ i ] = notifier | notifier_error ;
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gen_ctl = readl ( pp - > gen_block + NV_ADMA_GEN_CTL ) ;
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if ( ! NV_ADMA_CHECK_INTR ( gen_ctl , ap - > port_no ) & & ! notifier & &
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! notifier_error )
/* Nothing to do */
continue ;
status = readw ( mmio + NV_ADMA_STAT ) ;
/* Clear status. Ensure the controller sees the clearing before we start
looking at any of the CPB statuses , so that any CPB completions after
this point in the handler will raise another interrupt . */
writew ( status , mmio + NV_ADMA_STAT ) ;
readw ( mmio + NV_ADMA_STAT ) ; /* flush posted write */
rmb ( ) ;
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handled + + ; /* irq handled if we got here */
/* freeze if hotplugged or controller error */
if ( unlikely ( status & ( NV_ADMA_STAT_HOTPLUG |
NV_ADMA_STAT_HOTUNPLUG |
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NV_ADMA_STAT_TIMEOUT |
NV_ADMA_STAT_SERROR ) ) ) {
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struct ata_eh_info * ehi = & ap - > link . eh_info ;
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ata_ehi_clear_desc ( ehi ) ;
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__ata_ehi_push_desc ( ehi , " ADMA status 0x%08x: " , status ) ;
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if ( status & NV_ADMA_STAT_TIMEOUT ) {
ehi - > err_mask | = AC_ERR_SYSTEM ;
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ata_ehi_push_desc ( ehi , " timeout " ) ;
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} else if ( status & NV_ADMA_STAT_HOTPLUG ) {
ata_ehi_hotplugged ( ehi ) ;
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ata_ehi_push_desc ( ehi , " hotplug " ) ;
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} else if ( status & NV_ADMA_STAT_HOTUNPLUG ) {
ata_ehi_hotplugged ( ehi ) ;
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ata_ehi_push_desc ( ehi , " hot unplug " ) ;
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} else if ( status & NV_ADMA_STAT_SERROR ) {
/* let libata analyze SError and figure out the cause */
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ata_ehi_push_desc ( ehi , " SError " ) ;
} else
ata_ehi_push_desc ( ehi , " unknown " ) ;
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ata_port_freeze ( ap ) ;
continue ;
}
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if ( status & ( NV_ADMA_STAT_DONE |
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NV_ADMA_STAT_CPBERR |
NV_ADMA_STAT_CMD_COMPLETE ) ) {
u32 check_commands = notifier_clears [ i ] ;
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int pos , error = 0 ;
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if ( status & NV_ADMA_STAT_CPBERR ) {
/* Check all active commands */
if ( ata_tag_valid ( ap - > link . active_tag ) )
check_commands = 1 < <
ap - > link . active_tag ;
else
check_commands = ap - >
link . sactive ;
}
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/** Check CPBs for completed commands */
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while ( ( pos = ffs ( check_commands ) ) & & ! error ) {
pos - - ;
error = nv_adma_check_cpb ( ap , pos ,
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notifier_error & ( 1 < < pos ) ) ;
check_commands & = ~ ( 1 < < pos ) ;
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}
}
}
}
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if ( notifier_clears [ 0 ] | | notifier_clears [ 1 ] ) {
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/* Note: Both notifier clear registers must be written
if either is set , even if one is zero , according to NVIDIA . */
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struct nv_adma_port_priv * pp = host - > ports [ 0 ] - > private_data ;
writel ( notifier_clears [ 0 ] , pp - > notifier_clear_block ) ;
pp = host - > ports [ 1 ] - > private_data ;
writel ( notifier_clears [ 1 ] , pp - > notifier_clear_block ) ;
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}
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spin_unlock ( & host - > lock ) ;
return IRQ_RETVAL ( handled ) ;
}
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static void nv_adma_freeze ( struct ata_port * ap )
{
struct nv_adma_port_priv * pp = ap - > private_data ;
void __iomem * mmio = pp - > ctl_block ;
u16 tmp ;
nv_ck804_freeze ( ap ) ;
if ( pp - > flags & NV_ADMA_ATAPI_SETUP_COMPLETE )
return ;
/* clear any outstanding CK804 notifications */
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writeb ( NV_INT_ALL < < ( ap - > port_no * NV_INT_PORT_SHIFT ) ,
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ap - > host - > iomap [ NV_MMIO_BAR ] + NV_INT_STATUS_CK804 ) ;
/* Disable interrupt */
tmp = readw ( mmio + NV_ADMA_CTL ) ;
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writew ( tmp & ~ ( NV_ADMA_CTL_AIEN | NV_ADMA_CTL_HOTPLUG_IEN ) ,
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mmio + NV_ADMA_CTL ) ;
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readw ( mmio + NV_ADMA_CTL ) ; /* flush posted write */
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}
static void nv_adma_thaw ( struct ata_port * ap )
{
struct nv_adma_port_priv * pp = ap - > private_data ;
void __iomem * mmio = pp - > ctl_block ;
u16 tmp ;
nv_ck804_thaw ( ap ) ;
if ( pp - > flags & NV_ADMA_ATAPI_SETUP_COMPLETE )
return ;
/* Enable interrupt */
tmp = readw ( mmio + NV_ADMA_CTL ) ;
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writew ( tmp | ( NV_ADMA_CTL_AIEN | NV_ADMA_CTL_HOTPLUG_IEN ) ,
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mmio + NV_ADMA_CTL ) ;
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readw ( mmio + NV_ADMA_CTL ) ; /* flush posted write */
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}
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static void nv_adma_irq_clear ( struct ata_port * ap )
{
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struct nv_adma_port_priv * pp = ap - > private_data ;
void __iomem * mmio = pp - > ctl_block ;
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u32 notifier_clears [ 2 ] ;
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if ( pp - > flags & NV_ADMA_ATAPI_SETUP_COMPLETE ) {
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ata_sff_irq_clear ( ap ) ;
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return ;
}
/* clear any outstanding CK804 notifications */
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writeb ( NV_INT_ALL < < ( ap - > port_no * NV_INT_PORT_SHIFT ) ,
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ap - > host - > iomap [ NV_MMIO_BAR ] + NV_INT_STATUS_CK804 ) ;
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/* clear ADMA status */
writew ( 0xffff , mmio + NV_ADMA_STAT ) ;
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/* clear notifiers - note both ports need to be written with
something even though we are only clearing on one */
if ( ap - > port_no = = 0 ) {
notifier_clears [ 0 ] = 0xFFFFFFFF ;
notifier_clears [ 1 ] = 0 ;
} else {
notifier_clears [ 0 ] = 0 ;
notifier_clears [ 1 ] = 0xFFFFFFFF ;
}
pp = ap - > host - > ports [ 0 ] - > private_data ;
writel ( notifier_clears [ 0 ] , pp - > notifier_clear_block ) ;
pp = ap - > host - > ports [ 1 ] - > private_data ;
writel ( notifier_clears [ 1 ] , pp - > notifier_clear_block ) ;
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}
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static void nv_adma_post_internal_cmd ( struct ata_queued_cmd * qc )
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{
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struct nv_adma_port_priv * pp = qc - > ap - > private_data ;
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if ( pp - > flags & NV_ADMA_PORT_REGISTER_MODE )
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ata_sff_post_internal_cmd ( qc ) ;
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}
static int nv_adma_port_start ( struct ata_port * ap )
{
struct device * dev = ap - > host - > dev ;
struct nv_adma_port_priv * pp ;
int rc ;
void * mem ;
dma_addr_t mem_dma ;
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void __iomem * mmio ;
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struct pci_dev * pdev = to_pci_dev ( dev ) ;
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u16 tmp ;
VPRINTK ( " ENTER \n " ) ;
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/* Ensure DMA mask is set to 32-bit before allocating legacy PRD and
pad buffers */
rc = pci_set_dma_mask ( pdev , DMA_BIT_MASK ( 32 ) ) ;
if ( rc )
return rc ;
rc = pci_set_consistent_dma_mask ( pdev , DMA_BIT_MASK ( 32 ) ) ;
if ( rc )
return rc ;
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rc = ata_port_start ( ap ) ;
if ( rc )
return rc ;
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pp = devm_kzalloc ( dev , sizeof ( * pp ) , GFP_KERNEL ) ;
if ( ! pp )
return - ENOMEM ;
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mmio = ap - > host - > iomap [ NV_MMIO_BAR ] + NV_ADMA_PORT +
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ap - > port_no * NV_ADMA_PORT_SIZE ;
pp - > ctl_block = mmio ;
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pp - > gen_block = ap - > host - > iomap [ NV_MMIO_BAR ] + NV_ADMA_GEN ;
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pp - > notifier_clear_block = pp - > gen_block +
NV_ADMA_NOTIFIER_CLEAR + ( 4 * ap - > port_no ) ;
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/* Now that the legacy PRD and padding buffer are allocated we can
safely raise the DMA mask to allocate the CPB / APRD table .
These are allowed to fail since we store the value that ends up
being used to set as the bounce limit in slave_config later if
needed . */
pci_set_dma_mask ( pdev , DMA_BIT_MASK ( 64 ) ) ;
pci_set_consistent_dma_mask ( pdev , DMA_BIT_MASK ( 64 ) ) ;
pp - > adma_dma_mask = * dev - > dma_mask ;
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mem = dmam_alloc_coherent ( dev , NV_ADMA_PORT_PRIV_DMA_SZ ,
& mem_dma , GFP_KERNEL ) ;
if ( ! mem )
return - ENOMEM ;
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memset ( mem , 0 , NV_ADMA_PORT_PRIV_DMA_SZ ) ;
/*
* First item in chunk of DMA memory :
* 128 - byte command parameter block ( CPB )
* one for each command tag
*/
pp - > cpb = mem ;
pp - > cpb_dma = mem_dma ;
writel ( mem_dma & 0xFFFFFFFF , mmio + NV_ADMA_CPB_BASE_LOW ) ;
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writel ( ( mem_dma > > 16 ) > > 16 , mmio + NV_ADMA_CPB_BASE_HIGH ) ;
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mem + = NV_ADMA_MAX_CPBS * NV_ADMA_CPB_SZ ;
mem_dma + = NV_ADMA_MAX_CPBS * NV_ADMA_CPB_SZ ;
/*
* Second item : block of ADMA_SGTBL_LEN s / g entries
*/
pp - > aprd = mem ;
pp - > aprd_dma = mem_dma ;
ap - > private_data = pp ;
/* clear any outstanding interrupt conditions */
writew ( 0xffff , mmio + NV_ADMA_STAT ) ;
/* initialize port variables */
pp - > flags = NV_ADMA_PORT_REGISTER_MODE ;
/* clear CPB fetch count */
writew ( 0 , mmio + NV_ADMA_CPB_COUNT ) ;
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/* clear GO for register mode, enable interrupt */
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tmp = readw ( mmio + NV_ADMA_CTL ) ;
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writew ( ( tmp & ~ NV_ADMA_CTL_GO ) | NV_ADMA_CTL_AIEN |
NV_ADMA_CTL_HOTPLUG_IEN , mmio + NV_ADMA_CTL ) ;
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tmp = readw ( mmio + NV_ADMA_CTL ) ;
writew ( tmp | NV_ADMA_CTL_CHANNEL_RESET , mmio + NV_ADMA_CTL ) ;
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readw ( mmio + NV_ADMA_CTL ) ; /* flush posted write */
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udelay ( 1 ) ;
writew ( tmp & ~ NV_ADMA_CTL_CHANNEL_RESET , mmio + NV_ADMA_CTL ) ;
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readw ( mmio + NV_ADMA_CTL ) ; /* flush posted write */
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return 0 ;
}
static void nv_adma_port_stop ( struct ata_port * ap )
{
struct nv_adma_port_priv * pp = ap - > private_data ;
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void __iomem * mmio = pp - > ctl_block ;
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VPRINTK ( " ENTER \n " ) ;
writew ( 0 , mmio + NV_ADMA_CTL ) ;
}
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# ifdef CONFIG_PM
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static int nv_adma_port_suspend ( struct ata_port * ap , pm_message_t mesg )
{
struct nv_adma_port_priv * pp = ap - > private_data ;
void __iomem * mmio = pp - > ctl_block ;
/* Go to register mode - clears GO */
nv_adma_register_mode ( ap ) ;
/* clear CPB fetch count */
writew ( 0 , mmio + NV_ADMA_CPB_COUNT ) ;
/* disable interrupt, shut down port */
writew ( 0 , mmio + NV_ADMA_CTL ) ;
return 0 ;
}
static int nv_adma_port_resume ( struct ata_port * ap )
{
struct nv_adma_port_priv * pp = ap - > private_data ;
void __iomem * mmio = pp - > ctl_block ;
u16 tmp ;
/* set CPB block location */
writel ( pp - > cpb_dma & 0xFFFFFFFF , mmio + NV_ADMA_CPB_BASE_LOW ) ;
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writel ( ( pp - > cpb_dma > > 16 ) > > 16 , mmio + NV_ADMA_CPB_BASE_HIGH ) ;
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/* clear any outstanding interrupt conditions */
writew ( 0xffff , mmio + NV_ADMA_STAT ) ;
/* initialize port variables */
pp - > flags | = NV_ADMA_PORT_REGISTER_MODE ;
/* clear CPB fetch count */
writew ( 0 , mmio + NV_ADMA_CPB_COUNT ) ;
/* clear GO for register mode, enable interrupt */
tmp = readw ( mmio + NV_ADMA_CTL ) ;
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writew ( ( tmp & ~ NV_ADMA_CTL_GO ) | NV_ADMA_CTL_AIEN |
NV_ADMA_CTL_HOTPLUG_IEN , mmio + NV_ADMA_CTL ) ;
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tmp = readw ( mmio + NV_ADMA_CTL ) ;
writew ( tmp | NV_ADMA_CTL_CHANNEL_RESET , mmio + NV_ADMA_CTL ) ;
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readw ( mmio + NV_ADMA_CTL ) ; /* flush posted write */
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udelay ( 1 ) ;
writew ( tmp & ~ NV_ADMA_CTL_CHANNEL_RESET , mmio + NV_ADMA_CTL ) ;
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readw ( mmio + NV_ADMA_CTL ) ; /* flush posted write */
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return 0 ;
}
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# endif
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static void nv_adma_setup_port ( struct ata_port * ap )
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{
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void __iomem * mmio = ap - > host - > iomap [ NV_MMIO_BAR ] ;
struct ata_ioports * ioport = & ap - > ioaddr ;
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VPRINTK ( " ENTER \n " ) ;
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mmio + = NV_ADMA_PORT + ap - > port_no * NV_ADMA_PORT_SIZE ;
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ioport - > cmd_addr = mmio ;
ioport - > data_addr = mmio + ( ATA_REG_DATA * 4 ) ;
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ioport - > error_addr =
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ioport - > feature_addr = mmio + ( ATA_REG_ERR * 4 ) ;
ioport - > nsect_addr = mmio + ( ATA_REG_NSECT * 4 ) ;
ioport - > lbal_addr = mmio + ( ATA_REG_LBAL * 4 ) ;
ioport - > lbam_addr = mmio + ( ATA_REG_LBAM * 4 ) ;
ioport - > lbah_addr = mmio + ( ATA_REG_LBAH * 4 ) ;
ioport - > device_addr = mmio + ( ATA_REG_DEVICE * 4 ) ;
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ioport - > status_addr =
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ioport - > command_addr = mmio + ( ATA_REG_STATUS * 4 ) ;
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ioport - > altstatus_addr =
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ioport - > ctl_addr = mmio + 0x20 ;
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}
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static int nv_adma_host_init ( struct ata_host * host )
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{
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struct pci_dev * pdev = to_pci_dev ( host - > dev ) ;
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unsigned int i ;
u32 tmp32 ;
VPRINTK ( " ENTER \n " ) ;
/* enable ADMA on the ports */
pci_read_config_dword ( pdev , NV_MCP_SATA_CFG_20 , & tmp32 ) ;
tmp32 | = NV_MCP_SATA_CFG_20_PORT0_EN |
NV_MCP_SATA_CFG_20_PORT0_PWB_EN |
NV_MCP_SATA_CFG_20_PORT1_EN |
NV_MCP_SATA_CFG_20_PORT1_PWB_EN ;
pci_write_config_dword ( pdev , NV_MCP_SATA_CFG_20 , tmp32 ) ;
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for ( i = 0 ; i < host - > n_ports ; i + + )
nv_adma_setup_port ( host - > ports [ i ] ) ;
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return 0 ;
}
static void nv_adma_fill_aprd ( struct ata_queued_cmd * qc ,
struct scatterlist * sg ,
int idx ,
struct nv_adma_prd * aprd )
{
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u8 flags = 0 ;
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if ( qc - > tf . flags & ATA_TFLAG_WRITE )
flags | = NV_APRD_WRITE ;
if ( idx = = qc - > n_elem - 1 )
flags | = NV_APRD_END ;
else if ( idx ! = 4 )
flags | = NV_APRD_CONT ;
aprd - > addr = cpu_to_le64 ( ( ( u64 ) sg_dma_address ( sg ) ) ) ;
aprd - > len = cpu_to_le32 ( ( ( u32 ) sg_dma_len ( sg ) ) ) ; /* len in bytes */
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aprd - > flags = flags ;
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aprd - > packet_len = 0 ;
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}
static void nv_adma_fill_sg ( struct ata_queued_cmd * qc , struct nv_adma_cpb * cpb )
{
struct nv_adma_port_priv * pp = qc - > ap - > private_data ;
struct nv_adma_prd * aprd ;
struct scatterlist * sg ;
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unsigned int si ;
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VPRINTK ( " ENTER \n " ) ;
2007-12-05 10:43:11 +03:00
for_each_sg ( qc - > sg , sg , qc - > n_elem , si ) {
aprd = ( si < 5 ) ? & cpb - > aprd [ si ] :
& pp - > aprd [ NV_ADMA_SGTBL_LEN * qc - > tag + ( si - 5 ) ] ;
nv_adma_fill_aprd ( qc , sg , si , aprd ) ;
2006-10-28 06:08:41 +04:00
}
2007-12-05 10:43:11 +03:00
if ( si > 5 )
2006-10-28 06:08:41 +04:00
cpb - > next_aprd = cpu_to_le64 ( ( ( u64 ) ( pp - > aprd_dma + NV_ADMA_SGTBL_SZ * qc - > tag ) ) ) ;
2007-02-20 04:02:27 +03:00
else
cpb - > next_aprd = cpu_to_le64 ( 0 ) ;
2006-10-28 06:08:41 +04:00
}
2007-02-06 03:26:02 +03:00
static int nv_adma_use_reg_mode ( struct ata_queued_cmd * qc )
{
struct nv_adma_port_priv * pp = qc - > ap - > private_data ;
/* ADMA engine can only be used for non-ATAPI DMA commands,
2007-11-26 01:59:36 +03:00
or interrupt - driven no - data commands . */
2007-10-26 04:47:30 +04:00
if ( ( pp - > flags & NV_ADMA_ATAPI_SETUP_COMPLETE ) | |
2007-11-26 01:59:36 +03:00
( qc - > tf . flags & ATA_TFLAG_POLLING ) )
2007-02-06 03:26:02 +03:00
return 1 ;
2007-10-26 04:47:30 +04:00
if ( ( qc - > flags & ATA_QCFLAG_DMAMAP ) | |
2007-02-06 03:26:02 +03:00
( qc - > tf . protocol = = ATA_PROT_NODATA ) )
return 0 ;
return 1 ;
}
2006-10-28 06:08:41 +04:00
static void nv_adma_qc_prep ( struct ata_queued_cmd * qc )
{
struct nv_adma_port_priv * pp = qc - > ap - > private_data ;
struct nv_adma_cpb * cpb = & pp - > cpb [ qc - > tag ] ;
u8 ctl_flags = NV_CPB_CTL_CPB_VALID |
NV_CPB_CTL_IEN ;
2007-02-06 03:26:02 +03:00
if ( nv_adma_use_reg_mode ( qc ) ) {
2007-11-26 01:59:36 +03:00
BUG_ON ( ! ( pp - > flags & NV_ADMA_ATAPI_SETUP_COMPLETE ) & &
( qc - > flags & ATA_QCFLAG_DMAMAP ) ) ;
2006-11-26 23:20:19 +03:00
nv_adma_register_mode ( qc - > ap ) ;
2008-04-07 17:47:16 +04:00
ata_sff_qc_prep ( qc ) ;
2006-10-28 06:08:41 +04:00
return ;
}
2007-02-20 04:02:27 +03:00
cpb - > resp_flags = NV_CPB_RESP_DONE ;
wmb ( ) ;
cpb - > ctl_flags = 0 ;
wmb ( ) ;
2006-10-28 06:08:41 +04:00
cpb - > len = 3 ;
cpb - > tag = qc - > tag ;
cpb - > next_cpb_idx = 0 ;
/* turn on NCQ flags for NCQ commands */
if ( qc - > tf . protocol = = ATA_PROT_NCQ )
ctl_flags | = NV_CPB_CTL_QUEUE | NV_CPB_CTL_FPDMA ;
2007-01-04 03:13:57 +03:00
VPRINTK ( " qc->flags = 0x%lx \n " , qc - > flags ) ;
2006-10-28 06:08:41 +04:00
nv_adma_tf_to_cpb ( & qc - > tf , cpb - > tf ) ;
2007-10-26 04:47:30 +04:00
if ( qc - > flags & ATA_QCFLAG_DMAMAP ) {
2007-02-06 03:26:02 +03:00
nv_adma_fill_sg ( qc , cpb ) ;
ctl_flags | = NV_CPB_CTL_APRD_VALID ;
} else
memset ( & cpb - > aprd [ 0 ] , 0 , sizeof ( struct nv_adma_prd ) * 5 ) ;
2006-10-28 06:08:41 +04:00
2007-10-26 08:03:37 +04:00
/* Be paranoid and don't let the device see NV_CPB_CTL_CPB_VALID
until we are finished filling in all of the contents */
2006-10-28 06:08:41 +04:00
wmb ( ) ;
cpb - > ctl_flags = ctl_flags ;
2007-02-20 04:02:27 +03:00
wmb ( ) ;
cpb - > resp_flags = 0 ;
2006-10-28 06:08:41 +04:00
}
static unsigned int nv_adma_qc_issue ( struct ata_queued_cmd * qc )
{
2006-11-26 23:20:19 +03:00
struct nv_adma_port_priv * pp = qc - > ap - > private_data ;
2007-01-04 03:13:57 +03:00
void __iomem * mmio = pp - > ctl_block ;
2007-02-20 03:42:30 +03:00
int curr_ncq = ( qc - > tf . protocol = = ATA_PROT_NCQ ) ;
2006-10-28 06:08:41 +04:00
VPRINTK ( " ENTER \n " ) ;
2007-11-26 01:59:36 +03:00
/* We can't handle result taskfile with NCQ commands, since
retrieving the taskfile switches us out of ADMA mode and would abort
existing commands . */
if ( unlikely ( qc - > tf . protocol = = ATA_PROT_NCQ & &
( qc - > flags & ATA_QCFLAG_RESULT_TF ) ) ) {
ata_dev_printk ( qc - > dev , KERN_ERR ,
" NCQ w/ RESULT_TF not allowed \n " ) ;
return AC_ERR_SYSTEM ;
}
2007-02-06 03:26:02 +03:00
if ( nv_adma_use_reg_mode ( qc ) ) {
2006-10-28 06:08:41 +04:00
/* use ATA register mode */
2007-02-06 03:26:02 +03:00
VPRINTK ( " using ATA register mode: 0x%lx \n " , qc - > flags ) ;
2007-11-26 01:59:36 +03:00
BUG_ON ( ! ( pp - > flags & NV_ADMA_ATAPI_SETUP_COMPLETE ) & &
( qc - > flags & ATA_QCFLAG_DMAMAP ) ) ;
2006-10-28 06:08:41 +04:00
nv_adma_register_mode ( qc - > ap ) ;
2008-04-07 17:47:16 +04:00
return ata_sff_qc_issue ( qc ) ;
2006-10-28 06:08:41 +04:00
} else
nv_adma_mode ( qc - > ap ) ;
/* write append register, command tag in lower 8 bits
and ( number of cpbs to append - 1 ) in top 8 bits */
wmb ( ) ;
2007-02-20 03:42:30 +03:00
2007-10-26 04:47:30 +04:00
if ( curr_ncq ! = pp - > last_issue_ncq ) {
2007-10-26 08:03:37 +04:00
/* Seems to need some delay before switching between NCQ and
non - NCQ commands , else we get command timeouts and such . */
2007-02-20 03:42:30 +03:00
udelay ( 20 ) ;
pp - > last_issue_ncq = curr_ncq ;
}
2006-10-28 06:08:41 +04:00
writew ( qc - > tag , mmio + NV_ADMA_APPEND ) ;
2007-10-26 08:03:37 +04:00
DPRINTK ( " Issued tag %u \n " , qc - > tag ) ;
2006-10-28 06:08:41 +04:00
return 0 ;
}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 17:55:46 +04:00
static irqreturn_t nv_generic_interrupt ( int irq , void * dev_instance )
2005-04-17 02:20:36 +04:00
{
2006-08-24 11:19:22 +04:00
struct ata_host * host = dev_instance ;
2005-04-17 02:20:36 +04:00
unsigned int i ;
unsigned int handled = 0 ;
unsigned long flags ;
2006-08-24 11:19:22 +04:00
spin_lock_irqsave ( & host - > lock , flags ) ;
2005-04-17 02:20:36 +04:00
2006-08-24 11:19:22 +04:00
for ( i = 0 ; i < host - > n_ports ; i + + ) {
2005-04-17 02:20:36 +04:00
struct ata_port * ap ;
2006-08-24 11:19:22 +04:00
ap = host - > ports [ i ] ;
2005-08-22 09:59:24 +04:00
if ( ap & &
2006-04-02 18:30:40 +04:00
! ( ap - > flags & ATA_FLAG_DISABLED ) ) {
2005-04-17 02:20:36 +04:00
struct ata_queued_cmd * qc ;
2007-08-06 13:36:22 +04:00
qc = ata_qc_from_tag ( ap , ap - > link . active_tag ) ;
2005-09-27 13:39:50 +04:00
if ( qc & & ( ! ( qc - > tf . flags & ATA_TFLAG_POLLING ) ) )
2008-04-07 17:47:16 +04:00
handled + = ata_sff_host_intr ( ap , qc ) ;
2006-01-05 06:13:04 +03:00
else
// No request pending? Clear interrupt status
// anyway, in case there's one pending.
2008-04-07 17:47:16 +04:00
ap - > ops - > sff_check_status ( ap ) ;
2005-04-17 02:20:36 +04:00
}
}
2006-08-24 11:19:22 +04:00
spin_unlock_irqrestore ( & host - > lock , flags ) ;
2005-04-17 02:20:36 +04:00
return IRQ_RETVAL ( handled ) ;
}
2006-08-24 11:19:22 +04:00
static irqreturn_t nv_do_interrupt ( struct ata_host * host , u8 irq_stat )
2006-06-17 10:49:56 +04:00
{
int i , handled = 0 ;
2006-08-24 11:19:22 +04:00
for ( i = 0 ; i < host - > n_ports ; i + + ) {
struct ata_port * ap = host - > ports [ i ] ;
2006-06-17 10:49:56 +04:00
if ( ap & & ! ( ap - > flags & ATA_FLAG_DISABLED ) )
handled + = nv_host_intr ( ap , irq_stat ) ;
irq_stat > > = NV_INT_PORT_SHIFT ;
}
return IRQ_RETVAL ( handled ) ;
}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 17:55:46 +04:00
static irqreturn_t nv_nf2_interrupt ( int irq , void * dev_instance )
2006-06-17 10:49:56 +04:00
{
2006-08-24 11:19:22 +04:00
struct ata_host * host = dev_instance ;
2006-06-17 10:49:56 +04:00
u8 irq_stat ;
irqreturn_t ret ;
2006-08-24 11:19:22 +04:00
spin_lock ( & host - > lock ) ;
2007-02-01 09:06:36 +03:00
irq_stat = ioread8 ( host - > ports [ 0 ] - > ioaddr . scr_addr + NV_INT_STATUS ) ;
2006-08-24 11:19:22 +04:00
ret = nv_do_interrupt ( host , irq_stat ) ;
spin_unlock ( & host - > lock ) ;
2006-06-17 10:49:56 +04:00
return ret ;
}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 17:55:46 +04:00
static irqreturn_t nv_ck804_interrupt ( int irq , void * dev_instance )
2006-06-17 10:49:56 +04:00
{
2006-08-24 11:19:22 +04:00
struct ata_host * host = dev_instance ;
2006-06-17 10:49:56 +04:00
u8 irq_stat ;
irqreturn_t ret ;
2006-08-24 11:19:22 +04:00
spin_lock ( & host - > lock ) ;
2007-02-01 09:06:36 +03:00
irq_stat = readb ( host - > iomap [ NV_MMIO_BAR ] + NV_INT_STATUS_CK804 ) ;
2006-08-24 11:19:22 +04:00
ret = nv_do_interrupt ( host , irq_stat ) ;
spin_unlock ( & host - > lock ) ;
2006-06-17 10:49:56 +04:00
return ret ;
}
2008-07-31 12:02:40 +04:00
static int nv_scr_read ( struct ata_link * link , unsigned int sc_reg , u32 * val )
2005-04-17 02:20:36 +04:00
{
if ( sc_reg > SCR_CONTROL )
2007-07-16 09:29:40 +04:00
return - EINVAL ;
2005-04-17 02:20:36 +04:00
2008-07-31 12:02:40 +04:00
* val = ioread32 ( link - > ap - > ioaddr . scr_addr + ( sc_reg * 4 ) ) ;
2007-07-16 09:29:40 +04:00
return 0 ;
2005-04-17 02:20:36 +04:00
}
2008-07-31 12:02:40 +04:00
static int nv_scr_write ( struct ata_link * link , unsigned int sc_reg , u32 val )
2005-04-17 02:20:36 +04:00
{
if ( sc_reg > SCR_CONTROL )
2007-07-16 09:29:40 +04:00
return - EINVAL ;
2005-04-17 02:20:36 +04:00
2008-07-31 12:02:40 +04:00
iowrite32 ( val , link - > ap - > ioaddr . scr_addr + ( sc_reg * 4 ) ) ;
2007-07-16 09:29:40 +04:00
return 0 ;
2005-04-17 02:20:36 +04:00
}
2009-01-25 05:25:22 +03:00
static int nv_noclassify_hardreset ( struct ata_link * link , unsigned int * class ,
unsigned long deadline )
{
bool online ;
int rc ;
rc = sata_link_hardreset ( link , sata_deb_timing_hotplug , deadline ,
& online , NULL ) ;
return online ? - EAGAIN : rc ;
}
2006-06-17 10:49:56 +04:00
static void nv_nf2_freeze ( struct ata_port * ap )
{
2007-02-01 09:06:36 +03:00
void __iomem * scr_addr = ap - > host - > ports [ 0 ] - > ioaddr . scr_addr ;
2006-06-17 10:49:56 +04:00
int shift = ap - > port_no * NV_INT_PORT_SHIFT ;
u8 mask ;
2007-02-01 09:06:36 +03:00
mask = ioread8 ( scr_addr + NV_INT_ENABLE ) ;
2006-06-17 10:49:56 +04:00
mask & = ~ ( NV_INT_ALL < < shift ) ;
2007-02-01 09:06:36 +03:00
iowrite8 ( mask , scr_addr + NV_INT_ENABLE ) ;
2006-06-17 10:49:56 +04:00
}
static void nv_nf2_thaw ( struct ata_port * ap )
{
2007-02-01 09:06:36 +03:00
void __iomem * scr_addr = ap - > host - > ports [ 0 ] - > ioaddr . scr_addr ;
2006-06-17 10:49:56 +04:00
int shift = ap - > port_no * NV_INT_PORT_SHIFT ;
u8 mask ;
2007-02-01 09:06:36 +03:00
iowrite8 ( NV_INT_ALL < < shift , scr_addr + NV_INT_STATUS ) ;
2006-06-17 10:49:56 +04:00
2007-02-01 09:06:36 +03:00
mask = ioread8 ( scr_addr + NV_INT_ENABLE ) ;
2006-06-17 10:49:56 +04:00
mask | = ( NV_INT_MASK < < shift ) ;
2007-02-01 09:06:36 +03:00
iowrite8 ( mask , scr_addr + NV_INT_ENABLE ) ;
2006-06-17 10:49:56 +04:00
}
static void nv_ck804_freeze ( struct ata_port * ap )
{
2007-02-01 09:06:36 +03:00
void __iomem * mmio_base = ap - > host - > iomap [ NV_MMIO_BAR ] ;
2006-06-17 10:49:56 +04:00
int shift = ap - > port_no * NV_INT_PORT_SHIFT ;
u8 mask ;
mask = readb ( mmio_base + NV_INT_ENABLE_CK804 ) ;
mask & = ~ ( NV_INT_ALL < < shift ) ;
writeb ( mask , mmio_base + NV_INT_ENABLE_CK804 ) ;
}
static void nv_ck804_thaw ( struct ata_port * ap )
{
2007-02-01 09:06:36 +03:00
void __iomem * mmio_base = ap - > host - > iomap [ NV_MMIO_BAR ] ;
2006-06-17 10:49:56 +04:00
int shift = ap - > port_no * NV_INT_PORT_SHIFT ;
u8 mask ;
writeb ( NV_INT_ALL < < shift , mmio_base + NV_INT_STATUS_CK804 ) ;
mask = readb ( mmio_base + NV_INT_ENABLE_CK804 ) ;
mask | = ( NV_INT_MASK < < shift ) ;
writeb ( mask , mmio_base + NV_INT_ENABLE_CK804 ) ;
}
2007-10-15 23:16:53 +04:00
static void nv_mcp55_freeze ( struct ata_port * ap )
{
void __iomem * mmio_base = ap - > host - > iomap [ NV_MMIO_BAR ] ;
int shift = ap - > port_no * NV_INT_PORT_SHIFT_MCP55 ;
u32 mask ;
writel ( NV_INT_ALL_MCP55 < < shift , mmio_base + NV_INT_STATUS_MCP55 ) ;
mask = readl ( mmio_base + NV_INT_ENABLE_MCP55 ) ;
mask & = ~ ( NV_INT_ALL_MCP55 < < shift ) ;
writel ( mask , mmio_base + NV_INT_ENABLE_MCP55 ) ;
2008-04-07 17:47:16 +04:00
ata_sff_freeze ( ap ) ;
2007-10-15 23:16:53 +04:00
}
static void nv_mcp55_thaw ( struct ata_port * ap )
{
void __iomem * mmio_base = ap - > host - > iomap [ NV_MMIO_BAR ] ;
int shift = ap - > port_no * NV_INT_PORT_SHIFT_MCP55 ;
u32 mask ;
writel ( NV_INT_ALL_MCP55 < < shift , mmio_base + NV_INT_STATUS_MCP55 ) ;
mask = readl ( mmio_base + NV_INT_ENABLE_MCP55 ) ;
mask | = ( NV_INT_MASK_MCP55 < < shift ) ;
writel ( mask , mmio_base + NV_INT_ENABLE_MCP55 ) ;
2008-04-07 17:47:16 +04:00
ata_sff_thaw ( ap ) ;
2007-10-15 23:16:53 +04:00
}
2006-10-28 06:08:41 +04:00
static void nv_adma_error_handler ( struct ata_port * ap )
{
struct nv_adma_port_priv * pp = ap - > private_data ;
2007-10-26 04:47:30 +04:00
if ( ! ( pp - > flags & NV_ADMA_PORT_REGISTER_MODE ) ) {
2007-01-04 03:13:57 +03:00
void __iomem * mmio = pp - > ctl_block ;
2006-10-28 06:08:41 +04:00
int i ;
u16 tmp ;
2007-02-26 13:51:33 +03:00
2007-10-26 04:47:30 +04:00
if ( ata_tag_valid ( ap - > link . active_tag ) | | ap - > link . sactive ) {
2007-02-12 03:34:44 +03:00
u32 notifier = readl ( mmio + NV_ADMA_NOTIFIER ) ;
u32 notifier_error = readl ( mmio + NV_ADMA_NOTIFIER_ERROR ) ;
u32 gen_ctl = readl ( pp - > gen_block + NV_ADMA_GEN_CTL ) ;
u32 status = readw ( mmio + NV_ADMA_STAT ) ;
2007-02-20 04:01:59 +03:00
u8 cpb_count = readb ( mmio + NV_ADMA_CPB_COUNT ) ;
u8 next_cpb_idx = readb ( mmio + NV_ADMA_NEXT_CPB_IDX ) ;
2007-02-12 03:34:44 +03:00
2007-10-26 08:03:37 +04:00
ata_port_printk ( ap , KERN_ERR ,
" EH in ADMA mode, notifier 0x%X "
2007-02-20 04:01:59 +03:00
" notifier_error 0x%X gen_ctl 0x%X status 0x%X "
" next cpb count 0x%X next cpb idx 0x%x \n " ,
notifier , notifier_error , gen_ctl , status ,
cpb_count , next_cpb_idx ) ;
2007-02-12 03:34:44 +03:00
2007-10-26 04:47:30 +04:00
for ( i = 0 ; i < NV_ADMA_MAX_CPBS ; i + + ) {
2007-02-12 03:34:44 +03:00
struct nv_adma_cpb * cpb = & pp - > cpb [ i ] ;
2007-10-26 04:47:30 +04:00
if ( ( ata_tag_valid ( ap - > link . active_tag ) & & i = = ap - > link . active_tag ) | |
2007-10-26 08:03:37 +04:00
ap - > link . sactive & ( 1 < < i ) )
2007-02-12 03:34:44 +03:00
ata_port_printk ( ap , KERN_ERR ,
" CPB %d: ctl_flags 0x%x, resp_flags 0x%x \n " ,
i , cpb - > ctl_flags , cpb - > resp_flags ) ;
}
}
2006-10-28 06:08:41 +04:00
/* Push us back into port register mode for error handling. */
nv_adma_register_mode ( ap ) ;
2007-10-26 08:03:37 +04:00
/* Mark all of the CPBs as invalid to prevent them from
being executed */
2007-10-26 04:47:30 +04:00
for ( i = 0 ; i < NV_ADMA_MAX_CPBS ; i + + )
2006-10-28 06:08:41 +04:00
pp - > cpb [ i ] . ctl_flags & = ~ NV_CPB_CTL_CPB_VALID ;
/* clear CPB fetch count */
writew ( 0 , mmio + NV_ADMA_CPB_COUNT ) ;
/* Reset channel */
tmp = readw ( mmio + NV_ADMA_CTL ) ;
writew ( tmp | NV_ADMA_CTL_CHANNEL_RESET , mmio + NV_ADMA_CTL ) ;
2007-10-26 04:47:30 +04:00
readw ( mmio + NV_ADMA_CTL ) ; /* flush posted write */
2006-10-28 06:08:41 +04:00
udelay ( 1 ) ;
writew ( tmp & ~ NV_ADMA_CTL_CHANNEL_RESET , mmio + NV_ADMA_CTL ) ;
2007-10-26 04:47:30 +04:00
readw ( mmio + NV_ADMA_CTL ) ; /* flush posted write */
2006-10-28 06:08:41 +04:00
}
2008-04-07 17:47:16 +04:00
ata_sff_error_handler ( ap ) ;
2006-10-28 06:08:41 +04:00
}
2007-10-15 23:16:53 +04:00
static void nv_swncq_qc_to_dq ( struct ata_port * ap , struct ata_queued_cmd * qc )
{
struct nv_swncq_port_priv * pp = ap - > private_data ;
struct defer_queue * dq = & pp - > defer_queue ;
/* queue is full */
WARN_ON ( dq - > tail - dq - > head = = ATA_MAX_QUEUE ) ;
dq - > defer_bits | = ( 1 < < qc - > tag ) ;
dq - > tag [ dq - > tail + + & ( ATA_MAX_QUEUE - 1 ) ] = qc - > tag ;
}
static struct ata_queued_cmd * nv_swncq_qc_from_dq ( struct ata_port * ap )
{
struct nv_swncq_port_priv * pp = ap - > private_data ;
struct defer_queue * dq = & pp - > defer_queue ;
unsigned int tag ;
if ( dq - > head = = dq - > tail ) /* null queue */
return NULL ;
tag = dq - > tag [ dq - > head & ( ATA_MAX_QUEUE - 1 ) ] ;
dq - > tag [ dq - > head + + & ( ATA_MAX_QUEUE - 1 ) ] = ATA_TAG_POISON ;
WARN_ON ( ! ( dq - > defer_bits & ( 1 < < tag ) ) ) ;
dq - > defer_bits & = ~ ( 1 < < tag ) ;
return ata_qc_from_tag ( ap , tag ) ;
}
static void nv_swncq_fis_reinit ( struct ata_port * ap )
{
struct nv_swncq_port_priv * pp = ap - > private_data ;
pp - > dhfis_bits = 0 ;
pp - > dmafis_bits = 0 ;
pp - > sdbfis_bits = 0 ;
pp - > ncq_flags = 0 ;
}
static void nv_swncq_pp_reinit ( struct ata_port * ap )
{
struct nv_swncq_port_priv * pp = ap - > private_data ;
struct defer_queue * dq = & pp - > defer_queue ;
dq - > head = 0 ;
dq - > tail = 0 ;
dq - > defer_bits = 0 ;
pp - > qc_active = 0 ;
pp - > last_issue_tag = ATA_TAG_POISON ;
nv_swncq_fis_reinit ( ap ) ;
}
static void nv_swncq_irq_clear ( struct ata_port * ap , u16 fis )
{
struct nv_swncq_port_priv * pp = ap - > private_data ;
writew ( fis , pp - > irq_block ) ;
}
static void __ata_bmdma_stop ( struct ata_port * ap )
{
struct ata_queued_cmd qc ;
qc . ap = ap ;
ata_bmdma_stop ( & qc ) ;
}
static void nv_swncq_ncq_stop ( struct ata_port * ap )
{
struct nv_swncq_port_priv * pp = ap - > private_data ;
unsigned int i ;
u32 sactive ;
u32 done_mask ;
ata_port_printk ( ap , KERN_ERR ,
" EH in SWNCQ mode,QC:qc_active 0x%X sactive 0x%X \n " ,
ap - > qc_active , ap - > link . sactive ) ;
ata_port_printk ( ap , KERN_ERR ,
" SWNCQ:qc_active 0x%X defer_bits 0x%X last_issue_tag 0x%x \n "
" dhfis 0x%X dmafis 0x%X sdbfis 0x%X \n " ,
pp - > qc_active , pp - > defer_queue . defer_bits , pp - > last_issue_tag ,
pp - > dhfis_bits , pp - > dmafis_bits , pp - > sdbfis_bits ) ;
ata_port_printk ( ap , KERN_ERR , " ATA_REG 0x%X ERR_REG 0x%X \n " ,
2008-04-07 17:47:16 +04:00
ap - > ops - > sff_check_status ( ap ) ,
2007-10-15 23:16:53 +04:00
ioread8 ( ap - > ioaddr . error_addr ) ) ;
sactive = readl ( pp - > sactive_block ) ;
done_mask = pp - > qc_active ^ sactive ;
ata_port_printk ( ap , KERN_ERR , " tag : dhfis dmafis sdbfis sacitve \n " ) ;
for ( i = 0 ; i < ATA_MAX_QUEUE ; i + + ) {
u8 err = 0 ;
if ( pp - > qc_active & ( 1 < < i ) )
err = 0 ;
else if ( done_mask & ( 1 < < i ) )
err = 1 ;
else
continue ;
ata_port_printk ( ap , KERN_ERR ,
" tag 0x%x: %01x %01x %01x %01x %s \n " , i ,
( pp - > dhfis_bits > > i ) & 0x1 ,
( pp - > dmafis_bits > > i ) & 0x1 ,
( pp - > sdbfis_bits > > i ) & 0x1 ,
( sactive > > i ) & 0x1 ,
( err ? " error! tag doesn't exit " : " " ) ) ;
}
nv_swncq_pp_reinit ( ap ) ;
2008-04-07 17:47:16 +04:00
ap - > ops - > sff_irq_clear ( ap ) ;
2007-10-15 23:16:53 +04:00
__ata_bmdma_stop ( ap ) ;
nv_swncq_irq_clear ( ap , 0xffff ) ;
}
static void nv_swncq_error_handler ( struct ata_port * ap )
{
struct ata_eh_context * ehc = & ap - > link . eh_context ;
if ( ap - > link . sactive ) {
nv_swncq_ncq_stop ( ap ) ;
libata: prefer hardreset
When both soft and hard resets are available, libata preferred
softreset till now. The logic behind it was to be softer to devices;
however, this doesn't really help much. Rationales for the change:
* BIOS may freeze lock certain things during boot and softreset can't
unlock those. This by itself is okay but during operation PHY event
or other error conditions can trigger hardreset and the device may
end up with different configuration.
For example, after a hardreset, previously unlockable HPA can be
unlocked resulting in different device size and thus revalidation
failure. Similar condition can occur during or after resume.
* Certain ATAPI devices require hardreset to recover after certain
error conditions. On PATA, this is done by issuing the DEVICE RESET
command. On SATA, COMRESET has equivalent effect. The problem is
that DEVICE RESET needs its own execution protocol.
For SFF controllers with bare TF access, it can be easily
implemented but more advanced controllers (e.g. ahci and sata_sil24)
require specialized implementations. Simply using hardreset solves
the problem nicely.
* COMRESET initialization sequence is the norm in SATA land and many
SATA devices don't work properly if only SRST is used. For example,
some PMPs behave this way and libata works around by always issuing
hardreset if the host supports PMP.
Like the above example, libata has developed a number of mechanisms
aiming to promote softreset to hardreset if softreset is not going
to work. This approach is time consuming and error prone.
Also, note that, dependingon how you read the specs, it could be
argued that PMP fan-out ports require COMRESET to start operation.
In fact, all the PMPs on the market except one don't work properly
if COMRESET is not issued to fan-out ports after PMP reset.
* COMRESET is an integral part of SATA connection and any working
device should be able to handle COMRESET properly. After all, it's
the way to signal hardreset during reboot. This is the most used
and recommended (at least by the ahci spec) method of resetting
devices.
So, this patch makes libata prefer hardreset over softreset by making
the following changes.
* Rename ATA_EH_RESET_MASK to ATA_EH_RESET and use it whereever
ATA_EH_{SOFT|HARD}RESET used to be used. ATA_EH_{SOFT|HARD}RESET is
now only used to tell prereset whether soft or hard reset will be
issued.
* Strip out now unneeded promote-to-hardreset logics from
ata_eh_reset(), ata_std_prereset(), sata_pmp_std_prereset() and
other places.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-01-23 18:05:14 +03:00
ehc - > i . action | = ATA_EH_RESET ;
2007-10-15 23:16:53 +04:00
}
2008-04-07 17:47:16 +04:00
ata_sff_error_handler ( ap ) ;
2007-10-15 23:16:53 +04:00
}
# ifdef CONFIG_PM
static int nv_swncq_port_suspend ( struct ata_port * ap , pm_message_t mesg )
{
void __iomem * mmio = ap - > host - > iomap [ NV_MMIO_BAR ] ;
u32 tmp ;
/* clear irq */
writel ( ~ 0 , mmio + NV_INT_STATUS_MCP55 ) ;
/* disable irq */
writel ( 0 , mmio + NV_INT_ENABLE_MCP55 ) ;
/* disable swncq */
tmp = readl ( mmio + NV_CTL_MCP55 ) ;
tmp & = ~ ( NV_CTL_PRI_SWNCQ | NV_CTL_SEC_SWNCQ ) ;
writel ( tmp , mmio + NV_CTL_MCP55 ) ;
return 0 ;
}
static int nv_swncq_port_resume ( struct ata_port * ap )
{
void __iomem * mmio = ap - > host - > iomap [ NV_MMIO_BAR ] ;
u32 tmp ;
/* clear irq */
writel ( ~ 0 , mmio + NV_INT_STATUS_MCP55 ) ;
/* enable irq */
writel ( 0x00fd00fd , mmio + NV_INT_ENABLE_MCP55 ) ;
/* enable swncq */
tmp = readl ( mmio + NV_CTL_MCP55 ) ;
writel ( tmp | NV_CTL_PRI_SWNCQ | NV_CTL_SEC_SWNCQ , mmio + NV_CTL_MCP55 ) ;
return 0 ;
}
# endif
static void nv_swncq_host_init ( struct ata_host * host )
{
u32 tmp ;
void __iomem * mmio = host - > iomap [ NV_MMIO_BAR ] ;
struct pci_dev * pdev = to_pci_dev ( host - > dev ) ;
u8 regval ;
/* disable ECO 398 */
pci_read_config_byte ( pdev , 0x7f , & regval ) ;
regval & = ~ ( 1 < < 7 ) ;
pci_write_config_byte ( pdev , 0x7f , regval ) ;
/* enable swncq */
tmp = readl ( mmio + NV_CTL_MCP55 ) ;
VPRINTK ( " HOST_CTL:0x%X \n " , tmp ) ;
writel ( tmp | NV_CTL_PRI_SWNCQ | NV_CTL_SEC_SWNCQ , mmio + NV_CTL_MCP55 ) ;
/* enable irq intr */
tmp = readl ( mmio + NV_INT_ENABLE_MCP55 ) ;
VPRINTK ( " HOST_ENABLE:0x%X \n " , tmp ) ;
writel ( tmp | 0x00fd00fd , mmio + NV_INT_ENABLE_MCP55 ) ;
/* clear port irq */
writel ( ~ 0x0 , mmio + NV_INT_STATUS_MCP55 ) ;
}
static int nv_swncq_slave_config ( struct scsi_device * sdev )
{
struct ata_port * ap = ata_shost_to_port ( sdev - > host ) ;
struct pci_dev * pdev = to_pci_dev ( ap - > host - > dev ) ;
struct ata_device * dev ;
int rc ;
u8 rev ;
u8 check_maxtor = 0 ;
unsigned char model_num [ ATA_ID_PROD_LEN + 1 ] ;
rc = ata_scsi_slave_config ( sdev ) ;
if ( sdev - > id > = ATA_MAX_DEVICES | | sdev - > channel | | sdev - > lun )
/* Not a proper libata device, ignore */
return rc ;
dev = & ap - > link . device [ sdev - > id ] ;
if ( ! ( ap - > flags & ATA_FLAG_NCQ ) | | dev - > class = = ATA_DEV_ATAPI )
return rc ;
/* if MCP51 and Maxtor, then disable ncq */
if ( pdev - > device = = PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA | |
pdev - > device = = PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA2 )
check_maxtor = 1 ;
/* if MCP55 and rev <= a2 and Maxtor, then disable ncq */
if ( pdev - > device = = PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA | |
pdev - > device = = PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA2 ) {
pci_read_config_byte ( pdev , 0x8 , & rev ) ;
if ( rev < = 0xa2 )
check_maxtor = 1 ;
}
if ( ! check_maxtor )
return rc ;
ata_id_c_string ( dev - > id , model_num , ATA_ID_PROD , sizeof ( model_num ) ) ;
if ( strncmp ( model_num , " Maxtor " , 6 ) = = 0 ) {
ata_scsi_change_queue_depth ( sdev , 1 ) ;
ata_dev_printk ( dev , KERN_NOTICE ,
" Disabling SWNCQ mode (depth %x) \n " , sdev - > queue_depth ) ;
}
return rc ;
}
static int nv_swncq_port_start ( struct ata_port * ap )
{
struct device * dev = ap - > host - > dev ;
void __iomem * mmio = ap - > host - > iomap [ NV_MMIO_BAR ] ;
struct nv_swncq_port_priv * pp ;
int rc ;
rc = ata_port_start ( ap ) ;
if ( rc )
return rc ;
pp = devm_kzalloc ( dev , sizeof ( * pp ) , GFP_KERNEL ) ;
if ( ! pp )
return - ENOMEM ;
pp - > prd = dmam_alloc_coherent ( dev , ATA_PRD_TBL_SZ * ATA_MAX_QUEUE ,
& pp - > prd_dma , GFP_KERNEL ) ;
if ( ! pp - > prd )
return - ENOMEM ;
memset ( pp - > prd , 0 , ATA_PRD_TBL_SZ * ATA_MAX_QUEUE ) ;
ap - > private_data = pp ;
pp - > sactive_block = ap - > ioaddr . scr_addr + 4 * SCR_ACTIVE ;
pp - > irq_block = mmio + NV_INT_STATUS_MCP55 + ap - > port_no * 2 ;
pp - > tag_block = mmio + NV_NCQ_REG_MCP55 + ap - > port_no * 2 ;
return 0 ;
}
static void nv_swncq_qc_prep ( struct ata_queued_cmd * qc )
{
if ( qc - > tf . protocol ! = ATA_PROT_NCQ ) {
2008-04-07 17:47:16 +04:00
ata_sff_qc_prep ( qc ) ;
2007-10-15 23:16:53 +04:00
return ;
}
if ( ! ( qc - > flags & ATA_QCFLAG_DMAMAP ) )
return ;
nv_swncq_fill_sg ( qc ) ;
}
static void nv_swncq_fill_sg ( struct ata_queued_cmd * qc )
{
struct ata_port * ap = qc - > ap ;
struct scatterlist * sg ;
struct nv_swncq_port_priv * pp = ap - > private_data ;
struct ata_prd * prd ;
2007-12-05 10:43:11 +03:00
unsigned int si , idx ;
2007-10-15 23:16:53 +04:00
prd = pp - > prd + ATA_MAX_PRD * qc - > tag ;
idx = 0 ;
2007-12-05 10:43:11 +03:00
for_each_sg ( qc - > sg , sg , qc - > n_elem , si ) {
2007-10-15 23:16:53 +04:00
u32 addr , offset ;
u32 sg_len , len ;
addr = ( u32 ) sg_dma_address ( sg ) ;
sg_len = sg_dma_len ( sg ) ;
while ( sg_len ) {
offset = addr & 0xffff ;
len = sg_len ;
if ( ( offset + sg_len ) > 0x10000 )
len = 0x10000 - offset ;
prd [ idx ] . addr = cpu_to_le32 ( addr ) ;
prd [ idx ] . flags_len = cpu_to_le32 ( len & 0xffff ) ;
idx + + ;
sg_len - = len ;
addr + = len ;
}
}
2007-12-05 10:43:11 +03:00
prd [ idx - 1 ] . flags_len | = cpu_to_le32 ( ATA_PRD_EOT ) ;
2007-10-15 23:16:53 +04:00
}
static unsigned int nv_swncq_issue_atacmd ( struct ata_port * ap ,
struct ata_queued_cmd * qc )
{
struct nv_swncq_port_priv * pp = ap - > private_data ;
if ( qc = = NULL )
return 0 ;
DPRINTK ( " Enter \n " ) ;
writel ( ( 1 < < qc - > tag ) , pp - > sactive_block ) ;
pp - > last_issue_tag = qc - > tag ;
pp - > dhfis_bits & = ~ ( 1 < < qc - > tag ) ;
pp - > dmafis_bits & = ~ ( 1 < < qc - > tag ) ;
pp - > qc_active | = ( 0x1 < < qc - > tag ) ;
2008-04-07 17:47:16 +04:00
ap - > ops - > sff_tf_load ( ap , & qc - > tf ) ; /* load tf registers */
ap - > ops - > sff_exec_command ( ap , & qc - > tf ) ;
2007-10-15 23:16:53 +04:00
DPRINTK ( " Issued tag %u \n " , qc - > tag ) ;
return 0 ;
}
static unsigned int nv_swncq_qc_issue ( struct ata_queued_cmd * qc )
{
struct ata_port * ap = qc - > ap ;
struct nv_swncq_port_priv * pp = ap - > private_data ;
if ( qc - > tf . protocol ! = ATA_PROT_NCQ )
2008-04-07 17:47:16 +04:00
return ata_sff_qc_issue ( qc ) ;
2007-10-15 23:16:53 +04:00
DPRINTK ( " Enter \n " ) ;
if ( ! pp - > qc_active )
nv_swncq_issue_atacmd ( ap , qc ) ;
else
nv_swncq_qc_to_dq ( ap , qc ) ; /* add qc to defer queue */
return 0 ;
}
static void nv_swncq_hotplug ( struct ata_port * ap , u32 fis )
{
u32 serror ;
struct ata_eh_info * ehi = & ap - > link . eh_info ;
ata_ehi_clear_desc ( ehi ) ;
/* AHCI needs SError cleared; otherwise, it might lock up */
sata_scr_read ( & ap - > link , SCR_ERROR , & serror ) ;
sata_scr_write ( & ap - > link , SCR_ERROR , serror ) ;
/* analyze @irq_stat */
if ( fis & NV_SWNCQ_IRQ_ADDED )
ata_ehi_push_desc ( ehi , " hot plug " ) ;
else if ( fis & NV_SWNCQ_IRQ_REMOVED )
ata_ehi_push_desc ( ehi , " hot unplug " ) ;
ata_ehi_hotplugged ( ehi ) ;
/* okay, let's hand over to EH */
ehi - > serror | = serror ;
ata_port_freeze ( ap ) ;
}
static int nv_swncq_sdbfis ( struct ata_port * ap )
{
struct ata_queued_cmd * qc ;
struct nv_swncq_port_priv * pp = ap - > private_data ;
struct ata_eh_info * ehi = & ap - > link . eh_info ;
u32 sactive ;
int nr_done = 0 ;
u32 done_mask ;
int i ;
u8 host_stat ;
u8 lack_dhfis = 0 ;
host_stat = ap - > ops - > bmdma_status ( ap ) ;
if ( unlikely ( host_stat & ATA_DMA_ERR ) ) {
/* error when transfering data to/from memory */
ata_ehi_clear_desc ( ehi ) ;
ata_ehi_push_desc ( ehi , " BMDMA stat 0x%x " , host_stat ) ;
ehi - > err_mask | = AC_ERR_HOST_BUS ;
libata: prefer hardreset
When both soft and hard resets are available, libata preferred
softreset till now. The logic behind it was to be softer to devices;
however, this doesn't really help much. Rationales for the change:
* BIOS may freeze lock certain things during boot and softreset can't
unlock those. This by itself is okay but during operation PHY event
or other error conditions can trigger hardreset and the device may
end up with different configuration.
For example, after a hardreset, previously unlockable HPA can be
unlocked resulting in different device size and thus revalidation
failure. Similar condition can occur during or after resume.
* Certain ATAPI devices require hardreset to recover after certain
error conditions. On PATA, this is done by issuing the DEVICE RESET
command. On SATA, COMRESET has equivalent effect. The problem is
that DEVICE RESET needs its own execution protocol.
For SFF controllers with bare TF access, it can be easily
implemented but more advanced controllers (e.g. ahci and sata_sil24)
require specialized implementations. Simply using hardreset solves
the problem nicely.
* COMRESET initialization sequence is the norm in SATA land and many
SATA devices don't work properly if only SRST is used. For example,
some PMPs behave this way and libata works around by always issuing
hardreset if the host supports PMP.
Like the above example, libata has developed a number of mechanisms
aiming to promote softreset to hardreset if softreset is not going
to work. This approach is time consuming and error prone.
Also, note that, dependingon how you read the specs, it could be
argued that PMP fan-out ports require COMRESET to start operation.
In fact, all the PMPs on the market except one don't work properly
if COMRESET is not issued to fan-out ports after PMP reset.
* COMRESET is an integral part of SATA connection and any working
device should be able to handle COMRESET properly. After all, it's
the way to signal hardreset during reboot. This is the most used
and recommended (at least by the ahci spec) method of resetting
devices.
So, this patch makes libata prefer hardreset over softreset by making
the following changes.
* Rename ATA_EH_RESET_MASK to ATA_EH_RESET and use it whereever
ATA_EH_{SOFT|HARD}RESET used to be used. ATA_EH_{SOFT|HARD}RESET is
now only used to tell prereset whether soft or hard reset will be
issued.
* Strip out now unneeded promote-to-hardreset logics from
ata_eh_reset(), ata_std_prereset(), sata_pmp_std_prereset() and
other places.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-01-23 18:05:14 +03:00
ehi - > action | = ATA_EH_RESET ;
2007-10-15 23:16:53 +04:00
return - EINVAL ;
}
2008-04-07 17:47:16 +04:00
ap - > ops - > sff_irq_clear ( ap ) ;
2007-10-15 23:16:53 +04:00
__ata_bmdma_stop ( ap ) ;
sactive = readl ( pp - > sactive_block ) ;
done_mask = pp - > qc_active ^ sactive ;
if ( unlikely ( done_mask & sactive ) ) {
ata_ehi_clear_desc ( ehi ) ;
ata_ehi_push_desc ( ehi , " illegal SWNCQ:qc_active transition "
" (%08x->%08x) " , pp - > qc_active , sactive ) ;
ehi - > err_mask | = AC_ERR_HSM ;
libata: prefer hardreset
When both soft and hard resets are available, libata preferred
softreset till now. The logic behind it was to be softer to devices;
however, this doesn't really help much. Rationales for the change:
* BIOS may freeze lock certain things during boot and softreset can't
unlock those. This by itself is okay but during operation PHY event
or other error conditions can trigger hardreset and the device may
end up with different configuration.
For example, after a hardreset, previously unlockable HPA can be
unlocked resulting in different device size and thus revalidation
failure. Similar condition can occur during or after resume.
* Certain ATAPI devices require hardreset to recover after certain
error conditions. On PATA, this is done by issuing the DEVICE RESET
command. On SATA, COMRESET has equivalent effect. The problem is
that DEVICE RESET needs its own execution protocol.
For SFF controllers with bare TF access, it can be easily
implemented but more advanced controllers (e.g. ahci and sata_sil24)
require specialized implementations. Simply using hardreset solves
the problem nicely.
* COMRESET initialization sequence is the norm in SATA land and many
SATA devices don't work properly if only SRST is used. For example,
some PMPs behave this way and libata works around by always issuing
hardreset if the host supports PMP.
Like the above example, libata has developed a number of mechanisms
aiming to promote softreset to hardreset if softreset is not going
to work. This approach is time consuming and error prone.
Also, note that, dependingon how you read the specs, it could be
argued that PMP fan-out ports require COMRESET to start operation.
In fact, all the PMPs on the market except one don't work properly
if COMRESET is not issued to fan-out ports after PMP reset.
* COMRESET is an integral part of SATA connection and any working
device should be able to handle COMRESET properly. After all, it's
the way to signal hardreset during reboot. This is the most used
and recommended (at least by the ahci spec) method of resetting
devices.
So, this patch makes libata prefer hardreset over softreset by making
the following changes.
* Rename ATA_EH_RESET_MASK to ATA_EH_RESET and use it whereever
ATA_EH_{SOFT|HARD}RESET used to be used. ATA_EH_{SOFT|HARD}RESET is
now only used to tell prereset whether soft or hard reset will be
issued.
* Strip out now unneeded promote-to-hardreset logics from
ata_eh_reset(), ata_std_prereset(), sata_pmp_std_prereset() and
other places.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-01-23 18:05:14 +03:00
ehi - > action | = ATA_EH_RESET ;
2007-10-15 23:16:53 +04:00
return - EINVAL ;
}
for ( i = 0 ; i < ATA_MAX_QUEUE ; i + + ) {
if ( ! ( done_mask & ( 1 < < i ) ) )
continue ;
qc = ata_qc_from_tag ( ap , i ) ;
if ( qc ) {
ata_qc_complete ( qc ) ;
pp - > qc_active & = ~ ( 1 < < i ) ;
pp - > dhfis_bits & = ~ ( 1 < < i ) ;
pp - > dmafis_bits & = ~ ( 1 < < i ) ;
pp - > sdbfis_bits | = ( 1 < < i ) ;
nr_done + + ;
}
}
if ( ! ap - > qc_active ) {
DPRINTK ( " over \n " ) ;
nv_swncq_pp_reinit ( ap ) ;
return nr_done ;
}
if ( pp - > qc_active & pp - > dhfis_bits )
return nr_done ;
if ( ( pp - > ncq_flags & ncq_saw_backout ) | |
( pp - > qc_active ^ pp - > dhfis_bits ) )
/* if the controller cann't get a device to host register FIS,
* The driver needs to reissue the new command .
*/
lack_dhfis = 1 ;
DPRINTK ( " id 0x%x QC: qc_active 0x%x, "
" SWNCQ:qc_active 0x%X defer_bits %X "
" dhfis 0x%X dmafis 0x%X last_issue_tag %x \n " ,
ap - > print_id , ap - > qc_active , pp - > qc_active ,
pp - > defer_queue . defer_bits , pp - > dhfis_bits ,
pp - > dmafis_bits , pp - > last_issue_tag ) ;
nv_swncq_fis_reinit ( ap ) ;
if ( lack_dhfis ) {
qc = ata_qc_from_tag ( ap , pp - > last_issue_tag ) ;
nv_swncq_issue_atacmd ( ap , qc ) ;
return nr_done ;
}
if ( pp - > defer_queue . defer_bits ) {
/* send deferral queue command */
qc = nv_swncq_qc_from_dq ( ap ) ;
WARN_ON ( qc = = NULL ) ;
nv_swncq_issue_atacmd ( ap , qc ) ;
}
return nr_done ;
}
static inline u32 nv_swncq_tag ( struct ata_port * ap )
{
struct nv_swncq_port_priv * pp = ap - > private_data ;
u32 tag ;
tag = readb ( pp - > tag_block ) > > 2 ;
return ( tag & 0x1f ) ;
}
static int nv_swncq_dmafis ( struct ata_port * ap )
{
struct ata_queued_cmd * qc ;
unsigned int rw ;
u8 dmactl ;
u32 tag ;
struct nv_swncq_port_priv * pp = ap - > private_data ;
__ata_bmdma_stop ( ap ) ;
tag = nv_swncq_tag ( ap ) ;
DPRINTK ( " dma setup tag 0x%x \n " , tag ) ;
qc = ata_qc_from_tag ( ap , tag ) ;
if ( unlikely ( ! qc ) )
return 0 ;
rw = qc - > tf . flags & ATA_TFLAG_WRITE ;
/* load PRD table addr. */
iowrite32 ( pp - > prd_dma + ATA_PRD_TBL_SZ * qc - > tag ,
ap - > ioaddr . bmdma_addr + ATA_DMA_TABLE_OFS ) ;
/* specify data direction, triple-check start bit is clear */
dmactl = ioread8 ( ap - > ioaddr . bmdma_addr + ATA_DMA_CMD ) ;
dmactl & = ~ ATA_DMA_WR ;
if ( ! rw )
dmactl | = ATA_DMA_WR ;
iowrite8 ( dmactl | ATA_DMA_START , ap - > ioaddr . bmdma_addr + ATA_DMA_CMD ) ;
return 1 ;
}
static void nv_swncq_host_interrupt ( struct ata_port * ap , u16 fis )
{
struct nv_swncq_port_priv * pp = ap - > private_data ;
struct ata_queued_cmd * qc ;
struct ata_eh_info * ehi = & ap - > link . eh_info ;
u32 serror ;
u8 ata_stat ;
int rc = 0 ;
2008-04-07 17:47:16 +04:00
ata_stat = ap - > ops - > sff_check_status ( ap ) ;
2007-10-15 23:16:53 +04:00
nv_swncq_irq_clear ( ap , fis ) ;
if ( ! fis )
return ;
if ( ap - > pflags & ATA_PFLAG_FROZEN )
return ;
if ( fis & NV_SWNCQ_IRQ_HOTPLUG ) {
nv_swncq_hotplug ( ap , fis ) ;
return ;
}
if ( ! pp - > qc_active )
return ;
2008-07-31 12:02:40 +04:00
if ( ap - > ops - > scr_read ( & ap - > link , SCR_ERROR , & serror ) )
2007-10-15 23:16:53 +04:00
return ;
2008-07-31 12:02:40 +04:00
ap - > ops - > scr_write ( & ap - > link , SCR_ERROR , serror ) ;
2007-10-15 23:16:53 +04:00
if ( ata_stat & ATA_ERR ) {
ata_ehi_clear_desc ( ehi ) ;
ata_ehi_push_desc ( ehi , " Ata error. fis:0x%X " , fis ) ;
ehi - > err_mask | = AC_ERR_DEV ;
ehi - > serror | = serror ;
libata: prefer hardreset
When both soft and hard resets are available, libata preferred
softreset till now. The logic behind it was to be softer to devices;
however, this doesn't really help much. Rationales for the change:
* BIOS may freeze lock certain things during boot and softreset can't
unlock those. This by itself is okay but during operation PHY event
or other error conditions can trigger hardreset and the device may
end up with different configuration.
For example, after a hardreset, previously unlockable HPA can be
unlocked resulting in different device size and thus revalidation
failure. Similar condition can occur during or after resume.
* Certain ATAPI devices require hardreset to recover after certain
error conditions. On PATA, this is done by issuing the DEVICE RESET
command. On SATA, COMRESET has equivalent effect. The problem is
that DEVICE RESET needs its own execution protocol.
For SFF controllers with bare TF access, it can be easily
implemented but more advanced controllers (e.g. ahci and sata_sil24)
require specialized implementations. Simply using hardreset solves
the problem nicely.
* COMRESET initialization sequence is the norm in SATA land and many
SATA devices don't work properly if only SRST is used. For example,
some PMPs behave this way and libata works around by always issuing
hardreset if the host supports PMP.
Like the above example, libata has developed a number of mechanisms
aiming to promote softreset to hardreset if softreset is not going
to work. This approach is time consuming and error prone.
Also, note that, dependingon how you read the specs, it could be
argued that PMP fan-out ports require COMRESET to start operation.
In fact, all the PMPs on the market except one don't work properly
if COMRESET is not issued to fan-out ports after PMP reset.
* COMRESET is an integral part of SATA connection and any working
device should be able to handle COMRESET properly. After all, it's
the way to signal hardreset during reboot. This is the most used
and recommended (at least by the ahci spec) method of resetting
devices.
So, this patch makes libata prefer hardreset over softreset by making
the following changes.
* Rename ATA_EH_RESET_MASK to ATA_EH_RESET and use it whereever
ATA_EH_{SOFT|HARD}RESET used to be used. ATA_EH_{SOFT|HARD}RESET is
now only used to tell prereset whether soft or hard reset will be
issued.
* Strip out now unneeded promote-to-hardreset logics from
ata_eh_reset(), ata_std_prereset(), sata_pmp_std_prereset() and
other places.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-01-23 18:05:14 +03:00
ehi - > action | = ATA_EH_RESET ;
2007-10-15 23:16:53 +04:00
ata_port_freeze ( ap ) ;
return ;
}
if ( fis & NV_SWNCQ_IRQ_BACKOUT ) {
/* If the IRQ is backout, driver must issue
* the new command again some time later .
*/
pp - > ncq_flags | = ncq_saw_backout ;
}
if ( fis & NV_SWNCQ_IRQ_SDBFIS ) {
pp - > ncq_flags | = ncq_saw_sdb ;
DPRINTK ( " id 0x%x SWNCQ: qc_active 0x%X "
" dhfis 0x%X dmafis 0x%X sactive 0x%X \n " ,
ap - > print_id , pp - > qc_active , pp - > dhfis_bits ,
pp - > dmafis_bits , readl ( pp - > sactive_block ) ) ;
rc = nv_swncq_sdbfis ( ap ) ;
if ( rc < 0 )
goto irq_error ;
}
if ( fis & NV_SWNCQ_IRQ_DHREGFIS ) {
/* The interrupt indicates the new command
* was transmitted correctly to the drive .
*/
pp - > dhfis_bits | = ( 0x1 < < pp - > last_issue_tag ) ;
pp - > ncq_flags | = ncq_saw_d2h ;
if ( pp - > ncq_flags & ( ncq_saw_sdb | ncq_saw_backout ) ) {
ata_ehi_push_desc ( ehi , " illegal fis transaction " ) ;
ehi - > err_mask | = AC_ERR_HSM ;
libata: prefer hardreset
When both soft and hard resets are available, libata preferred
softreset till now. The logic behind it was to be softer to devices;
however, this doesn't really help much. Rationales for the change:
* BIOS may freeze lock certain things during boot and softreset can't
unlock those. This by itself is okay but during operation PHY event
or other error conditions can trigger hardreset and the device may
end up with different configuration.
For example, after a hardreset, previously unlockable HPA can be
unlocked resulting in different device size and thus revalidation
failure. Similar condition can occur during or after resume.
* Certain ATAPI devices require hardreset to recover after certain
error conditions. On PATA, this is done by issuing the DEVICE RESET
command. On SATA, COMRESET has equivalent effect. The problem is
that DEVICE RESET needs its own execution protocol.
For SFF controllers with bare TF access, it can be easily
implemented but more advanced controllers (e.g. ahci and sata_sil24)
require specialized implementations. Simply using hardreset solves
the problem nicely.
* COMRESET initialization sequence is the norm in SATA land and many
SATA devices don't work properly if only SRST is used. For example,
some PMPs behave this way and libata works around by always issuing
hardreset if the host supports PMP.
Like the above example, libata has developed a number of mechanisms
aiming to promote softreset to hardreset if softreset is not going
to work. This approach is time consuming and error prone.
Also, note that, dependingon how you read the specs, it could be
argued that PMP fan-out ports require COMRESET to start operation.
In fact, all the PMPs on the market except one don't work properly
if COMRESET is not issued to fan-out ports after PMP reset.
* COMRESET is an integral part of SATA connection and any working
device should be able to handle COMRESET properly. After all, it's
the way to signal hardreset during reboot. This is the most used
and recommended (at least by the ahci spec) method of resetting
devices.
So, this patch makes libata prefer hardreset over softreset by making
the following changes.
* Rename ATA_EH_RESET_MASK to ATA_EH_RESET and use it whereever
ATA_EH_{SOFT|HARD}RESET used to be used. ATA_EH_{SOFT|HARD}RESET is
now only used to tell prereset whether soft or hard reset will be
issued.
* Strip out now unneeded promote-to-hardreset logics from
ata_eh_reset(), ata_std_prereset(), sata_pmp_std_prereset() and
other places.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-01-23 18:05:14 +03:00
ehi - > action | = ATA_EH_RESET ;
2007-10-15 23:16:53 +04:00
goto irq_error ;
}
if ( ! ( fis & NV_SWNCQ_IRQ_DMASETUP ) & &
! ( pp - > ncq_flags & ncq_saw_dmas ) ) {
2008-04-07 17:47:16 +04:00
ata_stat = ap - > ops - > sff_check_status ( ap ) ;
2007-10-15 23:16:53 +04:00
if ( ata_stat & ATA_BUSY )
goto irq_exit ;
if ( pp - > defer_queue . defer_bits ) {
DPRINTK ( " send next command \n " ) ;
qc = nv_swncq_qc_from_dq ( ap ) ;
nv_swncq_issue_atacmd ( ap , qc ) ;
}
}
}
if ( fis & NV_SWNCQ_IRQ_DMASETUP ) {
/* program the dma controller with appropriate PRD buffers
* and start the DMA transfer for requested command .
*/
pp - > dmafis_bits | = ( 0x1 < < nv_swncq_tag ( ap ) ) ;
pp - > ncq_flags | = ncq_saw_dmas ;
rc = nv_swncq_dmafis ( ap ) ;
}
irq_exit :
return ;
irq_error :
ata_ehi_push_desc ( ehi , " fis:0x%x " , fis ) ;
ata_port_freeze ( ap ) ;
return ;
}
static irqreturn_t nv_swncq_interrupt ( int irq , void * dev_instance )
{
struct ata_host * host = dev_instance ;
unsigned int i ;
unsigned int handled = 0 ;
unsigned long flags ;
u32 irq_stat ;
spin_lock_irqsave ( & host - > lock , flags ) ;
irq_stat = readl ( host - > iomap [ NV_MMIO_BAR ] + NV_INT_STATUS_MCP55 ) ;
for ( i = 0 ; i < host - > n_ports ; i + + ) {
struct ata_port * ap = host - > ports [ i ] ;
if ( ap & & ! ( ap - > flags & ATA_FLAG_DISABLED ) ) {
if ( ap - > link . sactive ) {
nv_swncq_host_interrupt ( ap , ( u16 ) irq_stat ) ;
handled = 1 ;
} else {
if ( irq_stat ) /* reserve Hotplug */
nv_swncq_irq_clear ( ap , 0xfff0 ) ;
handled + = nv_host_intr ( ap , ( u8 ) irq_stat ) ;
}
}
irq_stat > > = NV_INT_PORT_SHIFT_MCP55 ;
}
spin_unlock_irqrestore ( & host - > lock , flags ) ;
return IRQ_RETVAL ( handled ) ;
}
2007-10-26 08:03:37 +04:00
static int nv_init_one ( struct pci_dev * pdev , const struct pci_device_id * ent )
2005-04-17 02:20:36 +04:00
{
2007-10-26 08:03:37 +04:00
static int printed_version ;
2007-05-04 14:43:58 +04:00
const struct ata_port_info * ppi [ ] = { NULL , NULL } ;
2008-03-25 06:22:49 +03:00
struct nv_pi_priv * ipriv ;
2007-04-17 18:44:08 +04:00
struct ata_host * host ;
2007-01-04 03:13:57 +03:00
struct nv_host_priv * hpriv ;
2005-04-17 02:20:36 +04:00
int rc ;
u32 bar ;
2007-02-01 09:06:36 +03:00
void __iomem * base ;
2006-10-28 06:08:41 +04:00
unsigned long type = ent - > driver_data ;
2005-04-17 02:20:36 +04:00
// Make sure this is a SATA controller by counting the number of bars
// (NVIDIA SATA controllers will always have six bars). Otherwise,
// it's an IDE controller and we ignore it.
2007-10-26 08:03:37 +04:00
for ( bar = 0 ; bar < 6 ; bar + + )
2005-04-17 02:20:36 +04:00
if ( pci_resource_start ( pdev , bar ) = = 0 )
return - ENODEV ;
2007-01-04 03:13:57 +03:00
if ( ! printed_version + + )
2005-10-30 22:39:11 +03:00
dev_printk ( KERN_DEBUG , & pdev - > dev , " version " DRV_VERSION " \n " ) ;
2005-04-17 02:20:36 +04:00
2007-01-20 10:00:28 +03:00
rc = pcim_enable_device ( pdev ) ;
2005-04-17 02:20:36 +04:00
if ( rc )
2007-01-20 10:00:28 +03:00
return rc ;
2005-04-17 02:20:36 +04:00
2007-04-17 18:44:08 +04:00
/* determine type and allocate host */
2007-10-15 23:16:53 +04:00
if ( type = = CK804 & & adma_enabled ) {
2006-10-28 06:08:41 +04:00
dev_printk ( KERN_NOTICE , & pdev - > dev , " Using ADMA mode \n " ) ;
type = ADMA ;
2009-01-25 05:29:38 +03:00
} else if ( type = = MCP5x & & swncq_enabled ) {
dev_printk ( KERN_NOTICE , & pdev - > dev , " Using SWNCQ mode \n " ) ;
type = SWNCQ ;
2007-10-29 13:49:24 +03:00
}
2007-05-04 14:43:58 +04:00
ppi [ 0 ] = & nv_port_info [ type ] ;
2008-03-25 06:22:49 +03:00
ipriv = ppi [ 0 ] - > private_data ;
2008-04-07 17:47:16 +04:00
rc = ata_pci_sff_prepare_host ( pdev , ppi , & host ) ;
2007-04-17 18:44:08 +04:00
if ( rc )
return rc ;
2005-04-17 02:20:36 +04:00
2007-01-20 10:00:28 +03:00
hpriv = devm_kzalloc ( & pdev - > dev , sizeof ( * hpriv ) , GFP_KERNEL ) ;
2007-01-04 03:13:57 +03:00
if ( ! hpriv )
2007-01-20 10:00:28 +03:00
return - ENOMEM ;
2007-04-17 18:44:08 +04:00
hpriv - > type = type ;
host - > private_data = hpriv ;
2007-01-04 03:13:57 +03:00
2007-04-17 18:44:08 +04:00
/* request and iomap NV_MMIO_BAR */
rc = pcim_iomap_regions ( pdev , 1 < < NV_MMIO_BAR , DRV_NAME ) ;
if ( rc )
return rc ;
2005-04-17 02:20:36 +04:00
2007-04-17 18:44:08 +04:00
/* configure SCR access */
base = host - > iomap [ NV_MMIO_BAR ] ;
host - > ports [ 0 ] - > ioaddr . scr_addr = base + NV_PORT0_SCR_REG_OFFSET ;
host - > ports [ 1 ] - > ioaddr . scr_addr = base + NV_PORT1_SCR_REG_OFFSET ;
2005-04-17 02:20:36 +04:00
2006-06-17 10:49:56 +04:00
/* enable SATA space for CK804 */
2006-10-28 06:08:41 +04:00
if ( type > = CK804 ) {
2006-06-17 10:49:56 +04:00
u8 regval ;
pci_read_config_byte ( pdev , NV_MCP_SATA_CFG_20 , & regval ) ;
regval | = NV_MCP_SATA_CFG_20_SATA_SPACE_EN ;
pci_write_config_byte ( pdev , NV_MCP_SATA_CFG_20 , regval ) ;
}
2007-04-17 18:44:08 +04:00
/* init ADMA */
2006-10-28 06:08:41 +04:00
if ( type = = ADMA ) {
2007-04-17 18:44:08 +04:00
rc = nv_adma_host_init ( host ) ;
2006-10-28 06:08:41 +04:00
if ( rc )
2007-01-20 10:00:28 +03:00
return rc ;
2007-10-29 13:49:24 +03:00
} else if ( type = = SWNCQ )
2007-10-15 23:16:53 +04:00
nv_swncq_host_init ( host ) ;
2006-10-28 06:08:41 +04:00
2007-04-17 18:44:08 +04:00
pci_set_master ( pdev ) ;
2008-03-25 06:22:49 +03:00
return ata_host_activate ( host , pdev - > irq , ipriv - > irq_handler ,
IRQF_SHARED , ipriv - > sht ) ;
2005-04-17 02:20:36 +04:00
}
2007-03-02 11:31:26 +03:00
# ifdef CONFIG_PM
2007-01-04 03:13:57 +03:00
static int nv_pci_device_resume ( struct pci_dev * pdev )
{
struct ata_host * host = dev_get_drvdata ( & pdev - > dev ) ;
struct nv_host_priv * hpriv = host - > private_data ;
2007-02-06 03:26:04 +03:00
int rc ;
2007-01-04 03:13:57 +03:00
2007-02-06 03:26:04 +03:00
rc = ata_pci_device_do_resume ( pdev ) ;
2007-10-26 04:47:30 +04:00
if ( rc )
2007-02-06 03:26:04 +03:00
return rc ;
2007-01-04 03:13:57 +03:00
if ( pdev - > dev . power . power_state . event = = PM_EVENT_SUSPEND ) {
2007-10-26 04:47:30 +04:00
if ( hpriv - > type > = CK804 ) {
2007-01-04 03:13:57 +03:00
u8 regval ;
pci_read_config_byte ( pdev , NV_MCP_SATA_CFG_20 , & regval ) ;
regval | = NV_MCP_SATA_CFG_20_SATA_SPACE_EN ;
pci_write_config_byte ( pdev , NV_MCP_SATA_CFG_20 , regval ) ;
}
2007-10-26 04:47:30 +04:00
if ( hpriv - > type = = ADMA ) {
2007-01-04 03:13:57 +03:00
u32 tmp32 ;
struct nv_adma_port_priv * pp ;
/* enable/disable ADMA on the ports appropriately */
pci_read_config_dword ( pdev , NV_MCP_SATA_CFG_20 , & tmp32 ) ;
pp = host - > ports [ 0 ] - > private_data ;
2007-10-26 04:47:30 +04:00
if ( pp - > flags & NV_ADMA_ATAPI_SETUP_COMPLETE )
2007-01-04 03:13:57 +03:00
tmp32 & = ~ ( NV_MCP_SATA_CFG_20_PORT0_EN |
2007-10-26 08:03:37 +04:00
NV_MCP_SATA_CFG_20_PORT0_PWB_EN ) ;
2007-01-04 03:13:57 +03:00
else
tmp32 | = ( NV_MCP_SATA_CFG_20_PORT0_EN |
2007-10-26 08:03:37 +04:00
NV_MCP_SATA_CFG_20_PORT0_PWB_EN ) ;
2007-01-04 03:13:57 +03:00
pp = host - > ports [ 1 ] - > private_data ;
2007-10-26 04:47:30 +04:00
if ( pp - > flags & NV_ADMA_ATAPI_SETUP_COMPLETE )
2007-01-04 03:13:57 +03:00
tmp32 & = ~ ( NV_MCP_SATA_CFG_20_PORT1_EN |
2007-10-26 08:03:37 +04:00
NV_MCP_SATA_CFG_20_PORT1_PWB_EN ) ;
2007-01-04 03:13:57 +03:00
else
tmp32 | = ( NV_MCP_SATA_CFG_20_PORT1_EN |
2007-10-26 08:03:37 +04:00
NV_MCP_SATA_CFG_20_PORT1_PWB_EN ) ;
2007-01-04 03:13:57 +03:00
pci_write_config_dword ( pdev , NV_MCP_SATA_CFG_20 , tmp32 ) ;
}
}
ata_host_resume ( host ) ;
return 0 ;
}
2007-03-02 11:31:26 +03:00
# endif
2007-01-04 03:13:57 +03:00
2006-08-24 11:19:22 +04:00
static void nv_ck804_host_stop ( struct ata_host * host )
2006-06-17 10:49:56 +04:00
{
2006-08-24 11:19:22 +04:00
struct pci_dev * pdev = to_pci_dev ( host - > dev ) ;
2006-06-17 10:49:56 +04:00
u8 regval ;
/* disable SATA space for CK804 */
pci_read_config_byte ( pdev , NV_MCP_SATA_CFG_20 , & regval ) ;
regval & = ~ NV_MCP_SATA_CFG_20_SATA_SPACE_EN ;
pci_write_config_byte ( pdev , NV_MCP_SATA_CFG_20 , regval ) ;
}
2006-10-28 06:08:41 +04:00
static void nv_adma_host_stop ( struct ata_host * host )
{
struct pci_dev * pdev = to_pci_dev ( host - > dev ) ;
u32 tmp32 ;
/* disable ADMA on the ports */
pci_read_config_dword ( pdev , NV_MCP_SATA_CFG_20 , & tmp32 ) ;
tmp32 & = ~ ( NV_MCP_SATA_CFG_20_PORT0_EN |
NV_MCP_SATA_CFG_20_PORT0_PWB_EN |
NV_MCP_SATA_CFG_20_PORT1_EN |
NV_MCP_SATA_CFG_20_PORT1_PWB_EN ) ;
pci_write_config_dword ( pdev , NV_MCP_SATA_CFG_20 , tmp32 ) ;
nv_ck804_host_stop ( host ) ;
}
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static int __init nv_init ( void )
{
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return pci_register_driver ( & nv_pci_driver ) ;
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}
static void __exit nv_exit ( void )
{
pci_unregister_driver ( & nv_pci_driver ) ;
}
module_init ( nv_init ) ;
module_exit ( nv_exit ) ;
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module_param_named ( adma , adma_enabled , bool , 0444 ) ;
MODULE_PARM_DESC ( adma , " Enable use of ADMA (Default: true) " ) ;
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module_param_named ( swncq , swncq_enabled , bool , 0444 ) ;
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MODULE_PARM_DESC ( swncq , " Enable use of SWNCQ (Default: true) " ) ;
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