* for supplying a Promise UDMA board & WD UDMA drive for this work!
*/
-#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/init.h>
#include <linux/ide.h>
-#include <linux/delay.h>
#include <linux/scatterlist.h>
#include <linux/dma-mapping.h>
+#include <linux/io.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-
-static const struct drive_list_entry drive_whitelist [] = {
-
+static const struct drive_list_entry drive_whitelist[] = {
{ "Micropolis 2112A" , NULL },
{ "CONNER CTMA 4000" , NULL },
{ "CONNER CTT8000-A" , NULL },
{ NULL , NULL }
};
-static const struct drive_list_entry drive_blacklist [] = {
-
+static const struct drive_list_entry drive_blacklist[] = {
{ "WDC AC11000H" , NULL },
{ "WDC AC22100H" , NULL },
{ "WDC AC32500H" , NULL },
* ide_dma_intr - IDE DMA interrupt handler
* @drive: the drive the interrupt is for
*
- * Handle an interrupt completing a read/write DMA transfer on an
+ * Handle an interrupt completing a read/write DMA transfer on an
* IDE device
*/
-
-ide_startstop_t ide_dma_intr (ide_drive_t *drive)
+
+ide_startstop_t ide_dma_intr(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
u8 stat = 0, dma_stat = 0;
if (OK_STAT(stat, DRIVE_READY, drive->bad_wstat | ATA_DRQ)) {
if (!dma_stat) {
- struct request *rq = HWGROUP(drive)->rq;
+ struct request *rq = hwif->hwgroup->rq;
task_end_request(drive, rq, stat);
return ide_stopped;
}
- printk(KERN_ERR "%s: dma_intr: bad DMA status (dma_stat=%x)\n",
- drive->name, dma_stat);
+ printk(KERN_ERR "%s: %s: bad DMA status (0x%02x)\n",
+ drive->name, __func__, dma_stat);
}
return ide_error(drive, "dma_intr", stat);
}
-
EXPORT_SYMBOL_GPL(ide_dma_intr);
static int ide_dma_good_drive(ide_drive_t *drive)
int ide_build_sglist(ide_drive_t *drive, struct request *rq)
{
- ide_hwif_t *hwif = HWIF(drive);
+ ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
ide_map_sg(drive, rq);
return dma_map_sg(hwif->dev, sg, hwif->sg_nents,
hwif->sg_dma_direction);
}
-
EXPORT_SYMBOL_GPL(ide_build_sglist);
#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
*
* ide_build_dmatable() prepares a dma request. We map the command
* to get the pci bus addresses of the buffers and then build up
- * the PRD table that the IDE layer wants to be fed. The code
- * knows about the 64K wrap bug in the CS5530.
+ * the PRD table that the IDE layer wants to be fed.
+ *
+ * Most chipsets correctly interpret a length of 0x0000 as 64KB,
+ * but at least one (e.g. CS5530) misinterprets it as zero (!).
+ * So we break the 64KB entry into two 32KB entries instead.
*
* Returns the number of built PRD entries if all went okay,
* returns 0 otherwise.
*
* May also be invoked from trm290.c
*/
-
-int ide_build_dmatable (ide_drive_t *drive, struct request *rq)
+
+int ide_build_dmatable(ide_drive_t *drive, struct request *rq)
{
- ide_hwif_t *hwif = HWIF(drive);
+ ide_hwif_t *hwif = drive->hwif;
__le32 *table = (__le32 *)hwif->dmatable_cpu;
unsigned int is_trm290 = (hwif->chipset == ide_trm290) ? 1 : 0;
unsigned int count = 0;
int i;
struct scatterlist *sg;
- hwif->sg_nents = i = ide_build_sglist(drive, rq);
-
- if (!i)
+ hwif->sg_nents = ide_build_sglist(drive, rq);
+ if (hwif->sg_nents == 0)
return 0;
- sg = hwif->sg_table;
- while (i) {
- u32 cur_addr;
- u32 cur_len;
+ for_each_sg(hwif->sg_table, sg, hwif->sg_nents, i) {
+ u32 cur_addr, cur_len, xcount, bcount;
cur_addr = sg_dma_address(sg);
cur_len = sg_dma_len(sg);
*/
while (cur_len) {
- if (count++ >= PRD_ENTRIES) {
- printk(KERN_ERR "%s: DMA table too small\n", drive->name);
+ if (count++ >= PRD_ENTRIES)
goto use_pio_instead;
- } else {
- u32 xcount, bcount = 0x10000 - (cur_addr & 0xffff);
-
- if (bcount > cur_len)
- bcount = cur_len;
- *table++ = cpu_to_le32(cur_addr);
- xcount = bcount & 0xffff;
- if (is_trm290)
- xcount = ((xcount >> 2) - 1) << 16;
- else if (xcount == 0x0000) {
- /*
- * Most chipsets correctly interpret a length of 0x0000 as 64KB,
- * but at least one (e.g. CS5530) misinterprets it as zero (!).
- * So here we break the 64KB entry into two 32KB entries instead.
- */
- if (count++ >= PRD_ENTRIES) {
- printk(KERN_ERR "%s: DMA table too small\n", drive->name);
- goto use_pio_instead;
- }
- *table++ = cpu_to_le32(0x8000);
- *table++ = cpu_to_le32(cur_addr + 0x8000);
- xcount = 0x8000;
- }
- *table++ = cpu_to_le32(xcount);
- cur_addr += bcount;
- cur_len -= bcount;
+
+ bcount = 0x10000 - (cur_addr & 0xffff);
+ if (bcount > cur_len)
+ bcount = cur_len;
+ *table++ = cpu_to_le32(cur_addr);
+ xcount = bcount & 0xffff;
+ if (is_trm290)
+ xcount = ((xcount >> 2) - 1) << 16;
+ if (xcount == 0x0000) {
+ if (count++ >= PRD_ENTRIES)
+ goto use_pio_instead;
+ *table++ = cpu_to_le32(0x8000);
+ *table++ = cpu_to_le32(cur_addr + 0x8000);
+ xcount = 0x8000;
}
+ *table++ = cpu_to_le32(xcount);
+ cur_addr += bcount;
+ cur_len -= bcount;
}
-
- sg = sg_next(sg);
- i--;
}
if (count) {
return count;
}
- printk(KERN_ERR "%s: empty DMA table?\n", drive->name);
-
use_pio_instead:
+ printk(KERN_ERR "%s: %s\n", drive->name,
+ count ? "DMA table too small" : "empty DMA table?");
+
ide_destroy_dmatable(drive);
return 0; /* revert to PIO for this request */
}
-
EXPORT_SYMBOL_GPL(ide_build_dmatable);
#endif
* an oops as only one mapping can be live for each target at a given
* time.
*/
-
-void ide_destroy_dmatable (ide_drive_t *drive)
+
+void ide_destroy_dmatable(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->sg_nents,
hwif->sg_dma_direction);
}
-
EXPORT_SYMBOL_GPL(ide_destroy_dmatable);
#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
* to have DMA handling bugs are also set up appropriately based
* on the good/bad drive lists.
*/
-
-static int config_drive_for_dma (ide_drive_t *drive)
+
+static int config_drive_for_dma(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
u16 *id = drive->id;
*
* An IDE DMA transfer timed out. In the event of an error we ask
* the driver to resolve the problem, if a DMA transfer is still
- * in progress we continue to wait (arguably we need to add a
+ * in progress we continue to wait (arguably we need to add a
* secondary 'I don't care what the drive thinks' timeout here)
* Finally if we have an interrupt we let it complete the I/O.
* But only one time - we clear expiry and if it's still not
* completed after WAIT_CMD, we error and retry in PIO.
* This can occur if an interrupt is lost or due to hang or bugs.
*/
-
-static int dma_timer_expiry (ide_drive_t *drive)
+
+static int dma_timer_expiry(ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
- u8 dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+ ide_hwif_t *hwif = drive->hwif;
+ u8 dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
- printk(KERN_WARNING "%s: dma_timer_expiry: dma status == 0x%02x\n",
- drive->name, dma_stat);
+ printk(KERN_WARNING "%s: %s: DMA status (0x%02x)\n",
+ drive->name, __func__, dma_stat);
if ((dma_stat & 0x18) == 0x18) /* BUSY Stupid Early Timer !! */
return WAIT_CMD;
- HWGROUP(drive)->expiry = NULL; /* one free ride for now */
+ hwif->hwgroup->expiry = NULL; /* one free ride for now */
/* 1 dmaing, 2 error, 4 intr */
if (dma_stat & 2) /* ERROR */
void ide_dma_host_set(ide_drive_t *drive, int on)
{
- ide_hwif_t *hwif = HWIF(drive);
- u8 unit = (drive->select.b.unit & 0x01);
- u8 dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+ ide_hwif_t *hwif = drive->hwif;
+ u8 unit = drive->dn & 1;
+ u8 dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
if (on)
dma_stat |= (1 << (5 + unit));
else
outb(dma_stat, hwif->dma_base + ATA_DMA_STATUS);
}
-
EXPORT_SYMBOL_GPL(ide_dma_host_set);
#endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
* ide_dma_off_quietly - Generic DMA kill
* @drive: drive to control
*
- * Turn off the current DMA on this IDE controller.
+ * Turn off the current DMA on this IDE controller.
*/
void ide_dma_off_quietly(ide_drive_t *drive)
{
- drive->using_dma = 0;
+ drive->dev_flags &= ~IDE_DFLAG_USING_DMA;
ide_toggle_bounce(drive, 0);
drive->hwif->dma_ops->dma_host_set(drive, 0);
}
-
EXPORT_SYMBOL(ide_dma_off_quietly);
/**
printk(KERN_INFO "%s: DMA disabled\n", drive->name);
ide_dma_off_quietly(drive);
}
-
EXPORT_SYMBOL(ide_dma_off);
/**
void ide_dma_on(ide_drive_t *drive)
{
- drive->using_dma = 1;
+ drive->dev_flags |= IDE_DFLAG_USING_DMA;
ide_toggle_bounce(drive, 1);
drive->hwif->dma_ops->dma_host_set(drive, 1);
* override this function if they need to
*
* Returns 0 on success. If a PIO fallback is required then 1
- * is returned.
+ * is returned.
*/
int ide_dma_setup(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
- struct request *rq = HWGROUP(drive)->rq;
+ struct request *rq = hwif->hwgroup->rq;
unsigned int reading;
u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
u8 dma_stat;
drive->waiting_for_dma = 1;
return 0;
}
-
EXPORT_SYMBOL_GPL(ide_dma_setup);
void ide_dma_exec_cmd(ide_drive_t *drive, u8 command)
{
/* issue cmd to drive */
- ide_execute_command(drive, command, &ide_dma_intr, 2*WAIT_CMD, dma_timer_expiry);
+ ide_execute_command(drive, command, &ide_dma_intr, 2 * WAIT_CMD,
+ dma_timer_expiry);
}
EXPORT_SYMBOL_GPL(ide_dma_exec_cmd);
outb(dma_cmd | 1, hwif->dma_base + ATA_DMA_CMD);
}
- hwif->dma = 1;
wmb();
}
-
EXPORT_SYMBOL_GPL(ide_dma_start);
/* returns 1 on error, 0 otherwise */
-int __ide_dma_end (ide_drive_t *drive)
+int ide_dma_end(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
/* purge DMA mappings */
ide_destroy_dmatable(drive);
/* verify good DMA status */
- hwif->dma = 0;
wmb();
return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0;
}
-
-EXPORT_SYMBOL(__ide_dma_end);
+EXPORT_SYMBOL_GPL(ide_dma_end);
/* returns 1 if dma irq issued, 0 otherwise */
int ide_dma_test_irq(ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
- u8 dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+ ide_hwif_t *hwif = drive->hwif;
+ u8 dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
/* return 1 if INTR asserted */
if ((dma_stat & 4) == 4)
return 1;
- if (!drive->waiting_for_dma)
- printk(KERN_WARNING "%s: (%s) called while not waiting\n",
- drive->name, __func__);
+
return 0;
}
EXPORT_SYMBOL_GPL(ide_dma_test_irq);
static inline int config_drive_for_dma(ide_drive_t *drive) { return 0; }
#endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
-int __ide_dma_bad_drive (ide_drive_t *drive)
+int __ide_dma_bad_drive(ide_drive_t *drive)
{
u16 *id = drive->id;
}
return 0;
}
-
EXPORT_SYMBOL(__ide_dma_bad_drive);
static const u8 xfer_mode_bases[] = {
const struct ide_port_ops *port_ops = hwif->port_ops;
unsigned int mask = 0;
- switch(base) {
+ switch (base) {
case XFER_UDMA_0:
if ((id[ATA_ID_FIELD_VALID] & 4) == 0)
break;
return mode;
}
-
EXPORT_SYMBOL_GPL(ide_find_dma_mode);
static int ide_tune_dma(ide_drive_t *drive)
ide_hwif_t *hwif = drive->hwif;
u8 speed;
- if (drive->nodma || ata_id_has_dma(drive->id) == 0)
+ if (ata_id_has_dma(drive->id) == 0 ||
+ (drive->dev_flags & IDE_DFLAG_NODMA))
return 0;
/* consult the list of known "bad" drives */
ide_dma_on(drive);
}
-#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
-void ide_dma_lost_irq (ide_drive_t *drive)
+void ide_dma_lost_irq(ide_drive_t *drive)
{
- printk("%s: DMA interrupt recovery\n", drive->name);
+ printk(KERN_ERR "%s: DMA interrupt recovery\n", drive->name);
}
+EXPORT_SYMBOL_GPL(ide_dma_lost_irq);
-EXPORT_SYMBOL(ide_dma_lost_irq);
-
-void ide_dma_timeout (ide_drive_t *drive)
+void ide_dma_timeout(ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
+ ide_hwif_t *hwif = drive->hwif;
printk(KERN_ERR "%s: timeout waiting for DMA\n", drive->name);
if (hwif->dma_ops->dma_test_irq(drive))
return;
+ ide_dump_status(drive, "DMA timeout", hwif->tp_ops->read_status(hwif));
+
hwif->dma_ops->dma_end(drive);
}
-
-EXPORT_SYMBOL(ide_dma_timeout);
+EXPORT_SYMBOL_GPL(ide_dma_timeout);
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,
.dma_exec_cmd = ide_dma_exec_cmd,
.dma_start = ide_dma_start,
- .dma_end = __ide_dma_end,
+ .dma_end = ide_dma_end,
.dma_test_irq = ide_dma_test_irq,
.dma_timeout = ide_dma_timeout,
.dma_lost_irq = ide_dma_lost_irq,
projects / linux-2.6-omap-h63xx.git / blobdiff