2018-01-30 21:56:55 +01:00
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2017 Cadence
// Cadence PCIe controller driver.
// Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
# ifndef _PCIE_CADENCE_H
# define _PCIE_CADENCE_H
# include <linux/kernel.h>
# include <linux/pci.h>
/*
* Local Management Registers
*/
# define CDNS_PCIE_LM_BASE 0x00100000
/* Vendor ID Register */
# define CDNS_PCIE_LM_ID (CDNS_PCIE_LM_BASE + 0x0044)
# define CDNS_PCIE_LM_ID_VENDOR_MASK GENMASK(15, 0)
# define CDNS_PCIE_LM_ID_VENDOR_SHIFT 0
# define CDNS_PCIE_LM_ID_VENDOR(vid) \
( ( ( vid ) < < CDNS_PCIE_LM_ID_VENDOR_SHIFT ) & CDNS_PCIE_LM_ID_VENDOR_MASK )
# define CDNS_PCIE_LM_ID_SUBSYS_MASK GENMASK(31, 16)
# define CDNS_PCIE_LM_ID_SUBSYS_SHIFT 16
# define CDNS_PCIE_LM_ID_SUBSYS(sub) \
( ( ( sub ) < < CDNS_PCIE_LM_ID_SUBSYS_SHIFT ) & CDNS_PCIE_LM_ID_SUBSYS_MASK )
/* Root Port Requestor ID Register */
# define CDNS_PCIE_LM_RP_RID (CDNS_PCIE_LM_BASE + 0x0228)
# define CDNS_PCIE_LM_RP_RID_MASK GENMASK(15, 0)
# define CDNS_PCIE_LM_RP_RID_SHIFT 0
# define CDNS_PCIE_LM_RP_RID_(rid) \
( ( ( rid ) < < CDNS_PCIE_LM_RP_RID_SHIFT ) & CDNS_PCIE_LM_RP_RID_MASK )
2018-01-30 21:56:59 +01:00
/* Endpoint Bus and Device Number Register */
# define CDNS_PCIE_LM_EP_ID (CDNS_PCIE_LM_BASE + 0x022c)
# define CDNS_PCIE_LM_EP_ID_DEV_MASK GENMASK(4, 0)
# define CDNS_PCIE_LM_EP_ID_DEV_SHIFT 0
# define CDNS_PCIE_LM_EP_ID_BUS_MASK GENMASK(15, 8)
# define CDNS_PCIE_LM_EP_ID_BUS_SHIFT 8
/* Endpoint Function f BAR b Configuration Registers */
# define CDNS_PCIE_LM_EP_FUNC_BAR_CFG0(fn) \
( CDNS_PCIE_LM_BASE + 0x0240 + ( fn ) * 0x0008 )
# define CDNS_PCIE_LM_EP_FUNC_BAR_CFG1(fn) \
( CDNS_PCIE_LM_BASE + 0x0244 + ( fn ) * 0x0008 )
# define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_APERTURE_MASK(b) \
( GENMASK ( 4 , 0 ) < < ( ( b ) * 8 ) )
# define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_APERTURE(b, a) \
( ( ( a ) < < ( ( b ) * 8 ) ) & CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_APERTURE_MASK ( b ) )
# define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_CTRL_MASK(b) \
( GENMASK ( 7 , 5 ) < < ( ( b ) * 8 ) )
# define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_CTRL(b, c) \
( ( ( c ) < < ( ( b ) * 8 + 5 ) ) & CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_CTRL_MASK ( b ) )
/* Endpoint Function Configuration Register */
# define CDNS_PCIE_LM_EP_FUNC_CFG (CDNS_PCIE_LM_BASE + 0x02c0)
2018-01-30 21:56:55 +01:00
/* Root Complex BAR Configuration Register */
# define CDNS_PCIE_LM_RC_BAR_CFG (CDNS_PCIE_LM_BASE + 0x0300)
# define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_APERTURE_MASK GENMASK(5, 0)
# define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_APERTURE(a) \
( ( ( a ) < < 0 ) & CDNS_PCIE_LM_RC_BAR_CFG_BAR0_APERTURE_MASK )
# define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_CTRL_MASK GENMASK(8, 6)
# define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_CTRL(c) \
( ( ( c ) < < 6 ) & CDNS_PCIE_LM_RC_BAR_CFG_BAR0_CTRL_MASK )
# define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_APERTURE_MASK GENMASK(13, 9)
# define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_APERTURE(a) \
( ( ( a ) < < 9 ) & CDNS_PCIE_LM_RC_BAR_CFG_BAR1_APERTURE_MASK )
# define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_CTRL_MASK GENMASK(16, 14)
# define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_CTRL(c) \
( ( ( c ) < < 14 ) & CDNS_PCIE_LM_RC_BAR_CFG_BAR1_CTRL_MASK )
# define CDNS_PCIE_LM_RC_BAR_CFG_PREFETCH_MEM_ENABLE BIT(17)
# define CDNS_PCIE_LM_RC_BAR_CFG_PREFETCH_MEM_32BITS 0
# define CDNS_PCIE_LM_RC_BAR_CFG_PREFETCH_MEM_64BITS BIT(18)
# define CDNS_PCIE_LM_RC_BAR_CFG_IO_ENABLE BIT(19)
# define CDNS_PCIE_LM_RC_BAR_CFG_IO_16BITS 0
# define CDNS_PCIE_LM_RC_BAR_CFG_IO_32BITS BIT(20)
# define CDNS_PCIE_LM_RC_BAR_CFG_CHECK_ENABLE BIT(31)
/* BAR control values applicable to both Endpoint Function and Root Complex */
# define CDNS_PCIE_LM_BAR_CFG_CTRL_DISABLED 0x0
# define CDNS_PCIE_LM_BAR_CFG_CTRL_IO_32BITS 0x1
# define CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_32BITS 0x4
# define CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_32BITS 0x5
# define CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_64BITS 0x6
# define CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_64BITS 0x7
2018-01-30 21:56:59 +01:00
/*
* Endpoint Function Registers ( PCI configuration space for endpoint functions )
*/
# define CDNS_PCIE_EP_FUNC_BASE(fn) (((fn) << 12) & GENMASK(19, 12))
# define CDNS_PCIE_EP_FUNC_MSI_CAP_OFFSET 0x90
2018-01-30 21:56:55 +01:00
/*
* Root Port Registers ( PCI configuration space for the root port function )
*/
# define CDNS_PCIE_RP_BASE 0x00200000
/*
* Address Translation Registers
*/
# define CDNS_PCIE_AT_BASE 0x00400000
/* Region r Outbound AXI to PCIe Address Translation Register 0 */
# define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0(r) \
( CDNS_PCIE_AT_BASE + 0x0000 + ( ( r ) & 0x1f ) * 0x0020 )
# define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS_MASK GENMASK(5, 0)
# define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS(nbits) \
( ( ( nbits ) - 1 ) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS_MASK )
# define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN_MASK GENMASK(19, 12)
# define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN(devfn) \
( ( ( devfn ) < < 12 ) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN_MASK )
# define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS_MASK GENMASK(27, 20)
# define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS(bus) \
( ( ( bus ) < < 20 ) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS_MASK )
/* Region r Outbound AXI to PCIe Address Translation Register 1 */
# define CDNS_PCIE_AT_OB_REGION_PCI_ADDR1(r) \
( CDNS_PCIE_AT_BASE + 0x0004 + ( ( r ) & 0x1f ) * 0x0020 )
/* Region r Outbound PCIe Descriptor Register 0 */
# define CDNS_PCIE_AT_OB_REGION_DESC0(r) \
( CDNS_PCIE_AT_BASE + 0x0008 + ( ( r ) & 0x1f ) * 0x0020 )
# define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_MASK GENMASK(3, 0)
# define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_MEM 0x2
# define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_IO 0x6
# define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_CONF_TYPE0 0xa
# define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_CONF_TYPE1 0xb
# define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_NORMAL_MSG 0xc
# define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_VENDOR_MSG 0xd
/* Bit 23 MUST be set in RC mode. */
# define CDNS_PCIE_AT_OB_REGION_DESC0_HARDCODED_RID BIT(23)
# define CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN_MASK GENMASK(31, 24)
# define CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN(devfn) \
( ( ( devfn ) < < 24 ) & CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN_MASK )
/* Region r Outbound PCIe Descriptor Register 1 */
# define CDNS_PCIE_AT_OB_REGION_DESC1(r) \
( CDNS_PCIE_AT_BASE + 0x000c + ( ( r ) & 0x1f ) * 0x0020 )
# define CDNS_PCIE_AT_OB_REGION_DESC1_BUS_MASK GENMASK(7, 0)
# define CDNS_PCIE_AT_OB_REGION_DESC1_BUS(bus) \
( ( bus ) & CDNS_PCIE_AT_OB_REGION_DESC1_BUS_MASK )
/* Region r AXI Region Base Address Register 0 */
# define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0(r) \
( CDNS_PCIE_AT_BASE + 0x0018 + ( ( r ) & 0x1f ) * 0x0020 )
# define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS_MASK GENMASK(5, 0)
# define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS(nbits) \
( ( ( nbits ) - 1 ) & CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS_MASK )
/* Region r AXI Region Base Address Register 1 */
# define CDNS_PCIE_AT_OB_REGION_CPU_ADDR1(r) \
( CDNS_PCIE_AT_BASE + 0x001c + ( ( r ) & 0x1f ) * 0x0020 )
/* Root Port BAR Inbound PCIe to AXI Address Translation Register */
# define CDNS_PCIE_AT_IB_RP_BAR_ADDR0(bar) \
( CDNS_PCIE_AT_BASE + 0x0800 + ( bar ) * 0x0008 )
# define CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS_MASK GENMASK(5, 0)
# define CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS(nbits) \
( ( ( nbits ) - 1 ) & CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS_MASK )
# define CDNS_PCIE_AT_IB_RP_BAR_ADDR1(bar) \
( CDNS_PCIE_AT_BASE + 0x0804 + ( bar ) * 0x0008 )
enum cdns_pcie_rp_bar {
RP_BAR0 ,
RP_BAR1 ,
RP_NO_BAR
} ;
2018-01-30 21:56:59 +01:00
/* Endpoint Function BAR Inbound PCIe to AXI Address Translation Register */
# define CDNS_PCIE_AT_IB_EP_FUNC_BAR_ADDR0(fn, bar) \
( CDNS_PCIE_AT_BASE + 0x0840 + ( fn ) * 0x0040 + ( bar ) * 0x0008 )
# define CDNS_PCIE_AT_IB_EP_FUNC_BAR_ADDR1(fn, bar) \
( CDNS_PCIE_AT_BASE + 0x0844 + ( fn ) * 0x0040 + ( bar ) * 0x0008 )
/* Normal/Vendor specific message access: offset inside some outbound region */
# define CDNS_PCIE_NORMAL_MSG_ROUTING_MASK GENMASK(7, 5)
# define CDNS_PCIE_NORMAL_MSG_ROUTING(route) \
( ( ( route ) < < 5 ) & CDNS_PCIE_NORMAL_MSG_ROUTING_MASK )
# define CDNS_PCIE_NORMAL_MSG_CODE_MASK GENMASK(15, 8)
# define CDNS_PCIE_NORMAL_MSG_CODE(code) \
( ( ( code ) < < 8 ) & CDNS_PCIE_NORMAL_MSG_CODE_MASK )
# define CDNS_PCIE_MSG_NO_DATA BIT(16)
enum cdns_pcie_msg_code {
MSG_CODE_ASSERT_INTA = 0x20 ,
MSG_CODE_ASSERT_INTB = 0x21 ,
MSG_CODE_ASSERT_INTC = 0x22 ,
MSG_CODE_ASSERT_INTD = 0x23 ,
MSG_CODE_DEASSERT_INTA = 0x24 ,
MSG_CODE_DEASSERT_INTB = 0x25 ,
MSG_CODE_DEASSERT_INTC = 0x26 ,
MSG_CODE_DEASSERT_INTD = 0x27 ,
} ;
enum cdns_pcie_msg_routing {
/* Route to Root Complex */
MSG_ROUTING_TO_RC ,
/* Use Address Routing */
MSG_ROUTING_BY_ADDR ,
/* Use ID Routing */
MSG_ROUTING_BY_ID ,
/* Route as Broadcast Message from Root Complex */
MSG_ROUTING_BCAST ,
/* Local message; terminate at receiver (INTx messages) */
MSG_ROUTING_LOCAL ,
/* Gather & route to Root Complex (PME_TO_Ack message) */
MSG_ROUTING_GATHER ,
} ;
2018-01-30 21:56:55 +01:00
/**
* struct cdns_pcie - private data for Cadence PCIe controller drivers
* @ reg_base : IO mapped register base
* @ mem_res : start / end offsets in the physical system memory to map PCI accesses
2018-01-30 21:56:59 +01:00
* @ is_rc : tell whether the PCIe controller mode is Root Complex or Endpoint .
2018-01-30 21:56:55 +01:00
* @ bus : In Root Complex mode , the bus number
*/
struct cdns_pcie {
void __iomem * reg_base ;
struct resource * mem_res ;
2018-01-30 21:56:59 +01:00
bool is_rc ;
2018-01-30 21:56:55 +01:00
u8 bus ;
} ;
/* Register access */
static inline void cdns_pcie_writeb ( struct cdns_pcie * pcie , u32 reg , u8 value )
{
writeb ( value , pcie - > reg_base + reg ) ;
}
static inline void cdns_pcie_writew ( struct cdns_pcie * pcie , u32 reg , u16 value )
{
writew ( value , pcie - > reg_base + reg ) ;
}
static inline void cdns_pcie_writel ( struct cdns_pcie * pcie , u32 reg , u32 value )
{
writel ( value , pcie - > reg_base + reg ) ;
}
static inline u32 cdns_pcie_readl ( struct cdns_pcie * pcie , u32 reg )
{
return readl ( pcie - > reg_base + reg ) ;
}
/* Root Port register access */
static inline void cdns_pcie_rp_writeb ( struct cdns_pcie * pcie ,
u32 reg , u8 value )
{
writeb ( value , pcie - > reg_base + CDNS_PCIE_RP_BASE + reg ) ;
}
static inline void cdns_pcie_rp_writew ( struct cdns_pcie * pcie ,
u32 reg , u16 value )
{
writew ( value , pcie - > reg_base + CDNS_PCIE_RP_BASE + reg ) ;
}
2018-01-30 21:56:59 +01:00
/* Endpoint Function register access */
static inline void cdns_pcie_ep_fn_writeb ( struct cdns_pcie * pcie , u8 fn ,
u32 reg , u8 value )
{
writeb ( value , pcie - > reg_base + CDNS_PCIE_EP_FUNC_BASE ( fn ) + reg ) ;
}
static inline void cdns_pcie_ep_fn_writew ( struct cdns_pcie * pcie , u8 fn ,
u32 reg , u16 value )
{
writew ( value , pcie - > reg_base + CDNS_PCIE_EP_FUNC_BASE ( fn ) + reg ) ;
}
static inline void cdns_pcie_ep_fn_writel ( struct cdns_pcie * pcie , u8 fn ,
u32 reg , u16 value )
{
writel ( value , pcie - > reg_base + CDNS_PCIE_EP_FUNC_BASE ( fn ) + reg ) ;
}
static inline u8 cdns_pcie_ep_fn_readb ( struct cdns_pcie * pcie , u8 fn , u32 reg )
{
return readb ( pcie - > reg_base + CDNS_PCIE_EP_FUNC_BASE ( fn ) + reg ) ;
}
static inline u16 cdns_pcie_ep_fn_readw ( struct cdns_pcie * pcie , u8 fn , u32 reg )
{
return readw ( pcie - > reg_base + CDNS_PCIE_EP_FUNC_BASE ( fn ) + reg ) ;
}
static inline u32 cdns_pcie_ep_fn_readl ( struct cdns_pcie * pcie , u8 fn , u32 reg )
{
return readl ( pcie - > reg_base + CDNS_PCIE_EP_FUNC_BASE ( fn ) + reg ) ;
}
void cdns_pcie_set_outbound_region ( struct cdns_pcie * pcie , u8 fn ,
u32 r , bool is_io ,
u64 cpu_addr , u64 pci_addr , size_t size ) ;
void cdns_pcie_set_outbound_region_for_normal_msg ( struct cdns_pcie * pcie , u8 fn ,
u32 r , u64 cpu_addr ) ;
void cdns_pcie_reset_outbound_region ( struct cdns_pcie * pcie , u32 r ) ;
2018-01-30 21:56:55 +01:00
# endif /* _PCIE_CADENCE_H */