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ide: switch to DMA-mapping API part #2

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Follow-up to commit 5c05ff68b9
("ide: switch to DMA-mapping API"):

* pci_{alloc,free}_consistent() -> dma_{alloc,free}_coherent()
  in ide_{allocate,release}_dma_engine().

* Add ->prd_max_nents and ->prd_ent_size fields to ide_hwif_t
  (+ set default values in ide_allocate_dma_engine()).

* Make ide_{allocate,release}_dma_engine() available also
  for CONFIG_BLK_DEV_IDEDMA_SFF=n.  Then convert au1xxx-ide.c,
  scc_pata.c and sgiioc4.c to use them.

* Add missing ->init_dma method to scc_pata.

This patch also fixes:
- ->dmatable_cpu leak for au1xxx-ide
- too early realease of ->dmatable_cpu for scc_pata
- wrong amount of ->dmatable_cpu memory being freed for sgiioc4

While at it:
- remove superfluous ->dma_base check from ide_unregister()
- return -ENOMEM on error in ide_release_dma_engine()
- beautify error message in ide_release_dma_engine()

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-10-13 21:39:47 +02:00
parent ffa15a6915
commit 2bbd57cad3
6 changed files with 48 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/ide/ide-dma.c
View File

@ -844,36 +844,43 @@ void ide_dma_timeout(ide_drive_t *drive)
}
EXPORT_SYMBOL_GPL(ide_dma_timeout);
#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
void ide_release_dma_engine(ide_hwif_t *hwif)
{
if (hwif->dmatable_cpu) {
struct pci_dev *pdev = to_pci_dev(hwif->dev);
int prd_size = hwif->prd_max_nents * hwif->prd_ent_size;
pci_free_consistent(pdev, PRD_ENTRIES * PRD_BYTES,
hwif->dmatable_cpu, hwif->dmatable_dma);
dma_free_coherent(hwif->dev, prd_size,
hwif->dmatable_cpu, hwif->dmatable_dma);
hwif->dmatable_cpu = NULL;
}
}
EXPORT_SYMBOL_GPL(ide_release_dma_engine);
int ide_allocate_dma_engine(ide_hwif_t *hwif)
{
struct pci_dev *pdev = to_pci_dev(hwif->dev);
int prd_size;
hwif->dmatable_cpu = pci_alloc_consistent(pdev,
PRD_ENTRIES * PRD_BYTES,
&hwif->dmatable_dma);
if (hwif->prd_max_nents == 0)
hwif->prd_max_nents = PRD_ENTRIES;
if (hwif->prd_ent_size == 0)
hwif->prd_ent_size = PRD_BYTES;
if (hwif->dmatable_cpu)
return 0;
prd_size = hwif->prd_max_nents * hwif->prd_ent_size;
printk(KERN_ERR "%s: -- Error, unable to allocate DMA table.\n",
hwif->dmatable_cpu = dma_alloc_coherent(hwif->dev, prd_size,
&hwif->dmatable_dma,
GFP_ATOMIC);
if (hwif->dmatable_cpu == NULL) {
printk(KERN_ERR "%s: unable to allocate PRD table\n",
hwif->name);
return -ENOMEM;
}
return 1;
return 0;
}
EXPORT_SYMBOL_GPL(ide_allocate_dma_engine);
#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
const struct ide_dma_ops sff_dma_ops = {
.dma_host_set = ide_dma_host_set,
.dma_setup = ide_dma_setup,

3
drivers/ide/ide.c
View File

@ -227,8 +227,7 @@ void ide_unregister(ide_hwif_t *hwif)
kfree(hwif->sg_table);
unregister_blkdev(hwif->major, hwif->name);
if (hwif->dma_base)
ide_release_dma_engine(hwif);
ide_release_dma_engine(hwif);
mutex_unlock(&ide_cfg_mtx);
}

7
drivers/ide/mips/au1xxx-ide.c
View File

@ -427,10 +427,9 @@ static int auide_ddma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
NUM_DESCRIPTORS);
auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
NUM_DESCRIPTORS);
hwif->dmatable_cpu = dma_alloc_coherent(hwif->dev,
PRD_ENTRIES * PRD_BYTES, /* 1 Page */
&hwif->dmatable_dma, GFP_KERNEL);
/* FIXME: check return value */
(void)ide_allocate_dma_engine(hwif);
au1xxx_dbdma_start( auide->tx_chan );
au1xxx_dbdma_start( auide->rx_chan );

14
drivers/ide/pci/scc_pata.c
View File

@ -821,6 +821,12 @@ static void __devinit init_iops_scc(ide_hwif_t *hwif)
init_mmio_iops_scc(hwif);
}
static int __devinit scc_init_dma(ide_hwif_t *hwif,
const struct ide_port_info *d)
{
return ide_allocate_dma_engine(hwif);
}
static u8 scc_cable_detect(ide_hwif_t *hwif)
{
return ATA_CBL_PATA80;
@ -885,6 +891,7 @@ static const struct ide_dma_ops scc_dma_ops = {
{ \
.name = name_str, \
.init_iops = init_iops_scc, \
.init_dma = scc_init_dma, \
.init_hwif = init_hwif_scc, \
.tp_ops = &scc_tp_ops, \
.port_ops = &scc_port_ops, \
@ -922,13 +929,6 @@ static void __devexit scc_remove(struct pci_dev *dev)
{
struct scc_ports *ports = pci_get_drvdata(dev);
struct ide_host *host = ports->host;
ide_hwif_t *hwif = host->ports[0];
if (hwif->dmatable_cpu) {
pci_free_consistent(dev, PRD_ENTRIES * PRD_BYTES,
hwif->dmatable_cpu, hwif->dmatable_dma);
hwif->dmatable_cpu = NULL;
}
ide_host_remove(host);

17
drivers/ide/pci/sgiioc4.c
View File

@ -357,15 +357,14 @@ ide_dma_sgiioc4(ide_hwif_t *hwif, const struct ide_port_info *d)
}
hwif->dma_base = (unsigned long) virt_dma_base;
hwif->dmatable_cpu = pci_alloc_consistent(dev,
IOC4_PRD_ENTRIES * IOC4_PRD_BYTES,
&hwif->dmatable_dma);
if (!hwif->dmatable_cpu)
goto dma_pci_alloc_failure;
hwif->sg_max_nents = IOC4_PRD_ENTRIES;
hwif->prd_max_nents = IOC4_PRD_ENTRIES;
hwif->prd_ent_size = IOC4_PRD_BYTES;
if (ide_allocate_dma_engine(hwif))
goto dma_pci_alloc_failure;
pad = pci_alloc_consistent(dev, IOC4_IDE_CACHELINE_SIZE,
(dma_addr_t *)&hwif->extra_base);
if (pad) {
@ -373,8 +372,8 @@ ide_dma_sgiioc4(ide_hwif_t *hwif, const struct ide_port_info *d)
return 0;
}
pci_free_consistent(dev, IOC4_PRD_ENTRIES * IOC4_PRD_BYTES,
hwif->dmatable_cpu, hwif->dmatable_dma);
ide_release_dma_engine(hwif);
printk(KERN_ERR "%s(%s) -- ERROR: Unable to allocate DMA maps\n",
__func__, hwif->name);
printk(KERN_INFO "%s: changing from DMA to PIO mode", hwif->name);

17
include/linux/ide.h
View File

@ -788,6 +788,12 @@ typedef struct hwif_s {
unsigned int *dmatable_cpu;
/* dma physical region descriptor table (dma view) */
dma_addr_t dmatable_dma;
/* maximum number of PRD table entries */
int prd_max_nents;
/* PRD entry size in bytes */
int prd_ent_size;
/* Scatter-gather list used to build the above */
struct scatterlist *sg_table;
int sg_max_nents; /* Maximum number of entries in it */
@ -1423,14 +1429,14 @@ int ide_set_dma(ide_drive_t *);
void ide_check_dma_crc(ide_drive_t *);
ide_startstop_t ide_dma_intr(ide_drive_t *);
int ide_allocate_dma_engine(ide_hwif_t *);
void ide_release_dma_engine(ide_hwif_t *);
int ide_build_sglist(ide_drive_t *, struct request *);
void ide_destroy_dmatable(ide_drive_t *);
#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
extern int ide_build_dmatable(ide_drive_t *, struct request *);
int ide_allocate_dma_engine(ide_hwif_t *);
void ide_release_dma_engine(ide_hwif_t *);
void ide_dma_host_set(ide_drive_t *, int);
extern int ide_dma_setup(ide_drive_t *);
void ide_dma_exec_cmd(ide_drive_t *, u8);
@ -1453,11 +1459,8 @@ static inline void ide_dma_on(ide_drive_t *drive) { ; }
static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
#endif /* CONFIG_BLK_DEV_IDEDMA */
#ifndef CONFIG_BLK_DEV_IDEDMA_SFF
static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; }
#endif
#endif /* CONFIG_BLK_DEV_IDEDMA */
#ifdef CONFIG_BLK_DEV_IDEACPI
extern int ide_acpi_exec_tfs(ide_drive_t *drive);