ide: switch to DMA-mapping API part #2
Follow-up to commit 5c05ff68b9a9b40a9be949497e0aa980185565cf
("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>
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 244b61b..3f949b5 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -844,36 +844,43 @@
}
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,
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index a498245..083783e 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -227,8 +227,7 @@
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);
}
diff --git a/drivers/ide/mips/au1xxx-ide.c b/drivers/ide/mips/au1xxx-ide.c
index f9e88cf..0ec8fd1 100644
--- a/drivers/ide/mips/au1xxx-ide.c
+++ b/drivers/ide/mips/au1xxx-ide.c
@@ -427,10 +427,9 @@
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 );
diff --git a/drivers/ide/pci/scc_pata.c b/drivers/ide/pci/scc_pata.c
index 3e75bf5..9ce1d80 100644
--- a/drivers/ide/pci/scc_pata.c
+++ b/drivers/ide/pci/scc_pata.c
@@ -821,6 +821,12 @@
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 @@
{ \
.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 @@
{
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);
diff --git a/drivers/ide/pci/sgiioc4.c b/drivers/ide/pci/sgiioc4.c
index 84cd986..dd63454 100644
--- a/drivers/ide/pci/sgiioc4.c
+++ b/drivers/ide/pci/sgiioc4.c
@@ -357,15 +357,14 @@
}
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 @@
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);
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 39aaff8..8121aa9 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -788,6 +788,12 @@
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 @@
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_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);