#include <linux/init.h>
#include <linux/ide.h>
#include <linux/delay.h>
+#include <linux/scatterlist.h>
#include <asm/io.h>
#include <asm/irq.h>
{ "Compaq CRD-8241B" , "ALL" },
{ "CRD-8400B" , "ALL" },
{ "CRD-8480B", "ALL" },
- { "CRD-8480C", "ALL" },
{ "CRD-8482B", "ALL" },
{ "CRD-84" , "ALL" },
{ "SanDisk SDP3B" , "ALL" },
{ "CD-532E-A" , "ALL" },
{ "E-IDE CD-ROM CR-840", "ALL" },
{ "CD-ROM Drive/F5A", "ALL" },
- { "RICOH CD-R/RW MP7083A", "ALL" },
{ "WPI CDD-820", "ALL" },
{ "SAMSUNG CD-ROM SC-148C", "ALL" },
- { "SAMSUNG CD-ROM SC-148F", "ALL" },
{ "SAMSUNG CD-ROM SC", "ALL" },
{ "SanDisk SDP3B-64" , "ALL" },
{ "SAMSUNG CD-ROM SN-124", "ALL" },
- { "PLEXTOR CD-R PX-W8432T", "ALL" },
{ "ATAPI CD-ROM DRIVE 40X MAXIMUM", "ALL" },
{ "_NEC DV5800A", "ALL" },
{ NULL , NULL }
return 0;
}
-#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
/**
* ide_dma_intr - IDE DMA interrupt handler
* @drive: the drive the interrupt is for
printk(KERN_ERR "%s: dma_intr: bad DMA status (dma_stat=%x)\n",
drive->name, dma_stat);
}
- return DRIVER(drive)->error(drive, "dma_intr", stat);
+ return ide_error(drive, "dma_intr", stat);
}
EXPORT_SYMBOL_GPL(ide_dma_intr);
+#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
/**
* ide_build_sglist - map IDE scatter gather for DMA I/O
* @drive: the drive to build the DMA table for
{
ide_hwif_t *hwif = HWIF(drive);
struct scatterlist *sg = hwif->sg_table;
- int nents;
- nents = blk_rq_map_sg(drive->queue, rq, hwif->sg_table);
-
+ if ((rq->flags & REQ_DRIVE_TASKFILE) && rq->nr_sectors > 256)
+ BUG();
+
+ ide_map_sg(drive, rq);
+
if (rq_data_dir(rq) == READ)
hwif->sg_dma_direction = PCI_DMA_FROMDEVICE;
else
hwif->sg_dma_direction = PCI_DMA_TODEVICE;
- return pci_map_sg(hwif->pci_dev, sg, nents, hwif->sg_dma_direction);
+ return pci_map_sg(hwif->pci_dev, sg, hwif->sg_nents, hwif->sg_dma_direction);
}
EXPORT_SYMBOL_GPL(ide_build_sglist);
-/**
- * ide_raw_build_sglist - map IDE scatter gather for DMA
- * @drive: the drive to build the DMA table for
- * @rq: the request holding the sg list
- *
- * Perform the PCI mapping magic necessary to access the source or
- * target buffers of a taskfile request via PCI DMA. The lower layers
- * of the kernel provide the necessary cache management so that we can
- * operate in a portable fashion
- */
-
-int ide_raw_build_sglist(ide_drive_t *drive, struct request *rq)
-{
- ide_hwif_t *hwif = HWIF(drive);
- struct scatterlist *sg = hwif->sg_table;
- int nents = 0;
- ide_task_t *args = rq->special;
- u8 *virt_addr = rq->buffer;
- int sector_count = rq->nr_sectors;
-
- if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
- hwif->sg_dma_direction = PCI_DMA_TODEVICE;
- else
- hwif->sg_dma_direction = PCI_DMA_FROMDEVICE;
-
-#if 1
- if (sector_count > 256)
- BUG();
-
- if (sector_count > 128) {
-#else
- while (sector_count > 128) {
-#endif
- memset(&sg[nents], 0, sizeof(*sg));
- sg[nents].page = virt_to_page(virt_addr);
- sg[nents].offset = offset_in_page(virt_addr);
- sg[nents].length = 128 * SECTOR_SIZE;
- nents++;
- virt_addr = virt_addr + (128 * SECTOR_SIZE);
- sector_count -= 128;
- }
- memset(&sg[nents], 0, sizeof(*sg));
- sg[nents].page = virt_to_page(virt_addr);
- sg[nents].offset = offset_in_page(virt_addr);
- sg[nents].length = sector_count * SECTOR_SIZE;
- nents++;
-
- return pci_map_sg(hwif->pci_dev, sg, nents, hwif->sg_dma_direction);
-}
-
-EXPORT_SYMBOL_GPL(ide_raw_build_sglist);
-
/**
* ide_build_dmatable - build IDE DMA table
*
* the PRD table that the IDE layer wants to be fed. The code
* knows about the 64K wrap bug in the CS5530.
*
- * Returns 0 if all went okay, returns 1 otherwise.
+ * Returns the number of built PRD entries if all went okay,
+ * returns 0 otherwise.
+ *
* May also be invoked from trm290.c
*/
int i;
struct scatterlist *sg;
- if (HWGROUP(drive)->rq->flags & REQ_DRIVE_TASKFILE)
- hwif->sg_nents = i = ide_raw_build_sglist(drive, rq);
- else
- hwif->sg_nents = i = ide_build_sglist(drive, rq);
+ hwif->sg_nents = i = ide_build_sglist(drive, rq);
if (!i)
return 0;
EXPORT_SYMBOL(__ide_dma_check);
/**
- * ide_start_dma - begin a DMA phase
- * @hwif: interface
+ * ide_dma_setup - begin a DMA phase
* @drive: target device
- * @reading: set if reading, clear if writing
*
* Build an IDE DMA PRD (IDE speak for scatter gather table)
* and then set up the DMA transfer registers for a device
* Returns 0 on success. If a PIO fallback is required then 1
* is returned.
*/
-
-int ide_start_dma(ide_hwif_t *hwif, ide_drive_t *drive, int reading)
+
+int ide_dma_setup(ide_drive_t *drive)
{
+ ide_hwif_t *hwif = drive->hwif;
struct request *rq = HWGROUP(drive)->rq;
+ unsigned int reading;
u8 dma_stat;
+ if (rq_data_dir(rq))
+ reading = 0;
+ else
+ reading = 1 << 3;
+
/* fall back to pio! */
- if (!ide_build_dmatable(drive, rq))
+ if (!ide_build_dmatable(drive, rq)) {
+ ide_map_sg(drive, rq);
return 1;
+ }
/* PRD table */
hwif->OUTL(hwif->dmatable_dma, hwif->dma_prdtable);
return 0;
}
-EXPORT_SYMBOL(ide_start_dma);
-
-int __ide_dma_read (ide_drive_t *drive /*, struct request *rq */)
-{
- ide_hwif_t *hwif = HWIF(drive);
- struct request *rq = HWGROUP(drive)->rq;
- unsigned int reading = 1 << 3;
- u8 lba48 = (drive->addressing == 1) ? 1 : 0;
- task_ioreg_t command = WIN_NOP;
-
- /* try pio */
- if (ide_start_dma(hwif, drive, reading))
- return 1;
-
- if (drive->media != ide_disk)
- return 0;
-
- command = (lba48) ? WIN_READDMA_EXT : WIN_READDMA;
-
- if (drive->vdma)
- command = (lba48) ? WIN_READ_EXT: WIN_READ;
-
- if (rq->flags & REQ_DRIVE_TASKFILE) {
- ide_task_t *args = rq->special;
- command = args->tfRegister[IDE_COMMAND_OFFSET];
- }
-
- /* issue cmd to drive */
- ide_execute_command(drive, command, &ide_dma_intr, 2*WAIT_CMD, dma_timer_expiry);
- return hwif->ide_dma_begin(drive);
-}
-
-EXPORT_SYMBOL(__ide_dma_read);
+EXPORT_SYMBOL_GPL(ide_dma_setup);
-int __ide_dma_write (ide_drive_t *drive /*, struct request *rq */)
+static void ide_dma_exec_cmd(ide_drive_t *drive, u8 command)
{
- ide_hwif_t *hwif = HWIF(drive);
- struct request *rq = HWGROUP(drive)->rq;
- unsigned int reading = 0;
- u8 lba48 = (drive->addressing == 1) ? 1 : 0;
- task_ioreg_t command = WIN_NOP;
-
- /* try PIO instead of DMA */
- if (ide_start_dma(hwif, drive, reading))
- return 1;
-
- if (drive->media != ide_disk)
- return 0;
-
- command = (lba48) ? WIN_WRITEDMA_EXT : WIN_WRITEDMA;
- if (drive->vdma)
- command = (lba48) ? WIN_WRITE_EXT: WIN_WRITE;
-
- if (rq->flags & REQ_DRIVE_TASKFILE) {
- ide_task_t *args = rq->special;
- command = args->tfRegister[IDE_COMMAND_OFFSET];
- }
-
/* issue cmd to drive */
ide_execute_command(drive, command, &ide_dma_intr, 2*WAIT_CMD, dma_timer_expiry);
-
- return hwif->ide_dma_begin(drive);
}
-EXPORT_SYMBOL(__ide_dma_write);
-
-int __ide_dma_begin (ide_drive_t *drive)
+void ide_dma_start(ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u8 dma_cmd = hwif->INB(hwif->dma_command);
hwif->OUTB(dma_cmd|1, hwif->dma_command);
hwif->dma = 1;
wmb();
- return 0;
}
-EXPORT_SYMBOL(__ide_dma_begin);
+EXPORT_SYMBOL_GPL(ide_dma_start);
/* returns 1 on error, 0 otherwise */
int __ide_dma_end (ide_drive_t *drive)
EXPORT_SYMBOL(__ide_dma_end);
/* returns 1 if dma irq issued, 0 otherwise */
-int __ide_dma_test_irq (ide_drive_t *drive)
+static int __ide_dma_test_irq(ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u8 dma_stat = hwif->INB(hwif->dma_status);
drive->name, __FUNCTION__);
return 0;
}
-
-EXPORT_SYMBOL(__ide_dma_test_irq);
#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
int __ide_dma_bad_drive (ide_drive_t *drive)
EXPORT_SYMBOL(__ide_dma_good_drive);
-#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
-int __ide_dma_verbose (ide_drive_t *drive)
+int ide_use_dma(ide_drive_t *drive)
+{
+ struct hd_driveid *id = drive->id;
+ ide_hwif_t *hwif = drive->hwif;
+
+ /* consult the list of known "bad" drives */
+ if (__ide_dma_bad_drive(drive))
+ return 0;
+
+ /* capable of UltraDMA modes */
+ if (id->field_valid & 4) {
+ if (hwif->ultra_mask & id->dma_ultra)
+ return 1;
+ }
+
+ /* capable of regular DMA modes */
+ if (id->field_valid & 2) {
+ if (hwif->mwdma_mask & id->dma_mword)
+ return 1;
+ if (hwif->swdma_mask & id->dma_1word)
+ return 1;
+ }
+
+ /* consult the list of known "good" drives */
+ if (__ide_dma_good_drive(drive) && id->eide_dma_time < 150)
+ return 1;
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ide_use_dma);
+
+void ide_dma_verbose(ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
ide_hwif_t *hwif = HWIF(drive);
if (id->field_valid & 4) {
- if ((id->dma_ultra >> 8) && (id->dma_mword >> 8)) {
- printk(", BUG DMA OFF");
- return hwif->ide_dma_off_quietly(drive);
- }
+ if ((id->dma_ultra >> 8) && (id->dma_mword >> 8))
+ goto bug_dma_off;
if (id->dma_ultra & ((id->dma_ultra >> 8) & hwif->ultra_mask)) {
if (((id->dma_ultra >> 11) & 0x1F) &&
eighty_ninty_three(drive)) {
printk(", (U)DMA"); /* Can be BIOS-enabled! */
}
} else if (id->field_valid & 2) {
- if ((id->dma_mword >> 8) && (id->dma_1word >> 8)) {
- printk(", BUG DMA OFF");
- return hwif->ide_dma_off_quietly(drive);
- }
+ if ((id->dma_mword >> 8) && (id->dma_1word >> 8))
+ goto bug_dma_off;
printk(", DMA");
} else if (id->field_valid & 1) {
printk(", BUG");
}
- return 1;
+ return;
+bug_dma_off:
+ printk(", BUG DMA OFF");
+ hwif->ide_dma_off_quietly(drive);
+ return;
}
-EXPORT_SYMBOL(__ide_dma_verbose);
+EXPORT_SYMBOL(ide_dma_verbose);
+#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
int __ide_dma_lostirq (ide_drive_t *drive)
{
printk("%s: DMA interrupt recovery\n", drive->name);
/*
* Needed for allowing full modular support of ide-driver
*/
-int ide_release_dma_engine (ide_hwif_t *hwif)
+static int ide_release_dma_engine(ide_hwif_t *hwif)
{
if (hwif->dmatable_cpu) {
pci_free_consistent(hwif->pci_dev,
hwif->dmatable_dma);
hwif->dmatable_cpu = NULL;
}
- if (hwif->sg_table) {
- kfree(hwif->sg_table);
- hwif->sg_table = NULL;
- }
return 1;
}
-int ide_release_iomio_dma (ide_hwif_t *hwif)
+static int ide_release_iomio_dma(ide_hwif_t *hwif)
{
if ((hwif->dma_extra) && (hwif->channel == 0))
release_region((hwif->dma_base + 16), hwif->dma_extra);
return ide_release_iomio_dma(hwif);
}
-int ide_allocate_dma_engine (ide_hwif_t *hwif)
+static int ide_allocate_dma_engine(ide_hwif_t *hwif)
{
hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev,
PRD_ENTRIES * PRD_BYTES,
&hwif->dmatable_dma);
- hwif->sg_table = kmalloc(sizeof(struct scatterlist) * PRD_ENTRIES,
- GFP_KERNEL);
- if ((hwif->dmatable_cpu) && (hwif->sg_table))
+ if (hwif->dmatable_cpu)
return 0;
- printk(KERN_ERR "%s: -- Error, unable to allocate%s%s table(s).\n",
- (hwif->dmatable_cpu == NULL) ? " CPU" : "",
- (hwif->sg_table == NULL) ? " SG DMA" : " DMA",
- hwif->cds->name);
+ printk(KERN_ERR "%s: -- Error, unable to allocate%s DMA table(s).\n",
+ hwif->cds->name, !hwif->dmatable_cpu ? " CPU" : "");
ide_release_dma_engine(hwif);
return 1;
}
-int ide_mapped_mmio_dma (ide_hwif_t *hwif, unsigned long base, unsigned int ports)
+static int ide_mapped_mmio_dma(ide_hwif_t *hwif, unsigned long base, unsigned int ports)
{
printk(KERN_INFO " %s: MMIO-DMA ", hwif->name);
return 0;
}
-int ide_iomio_dma (ide_hwif_t *hwif, unsigned long base, unsigned int ports)
+static int ide_iomio_dma(ide_hwif_t *hwif, unsigned long base, unsigned int ports)
{
printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx",
hwif->name, base, base + ports - 1);
return 0;
}
-/*
- *
- */
-int ide_dma_iobase (ide_hwif_t *hwif, unsigned long base, unsigned int ports)
+static int ide_dma_iobase(ide_hwif_t *hwif, unsigned long base, unsigned int ports)
{
if (hwif->mmio == 2)
return ide_mapped_mmio_dma(hwif, base,ports);
hwif->ide_dma_host_on = &__ide_dma_host_on;
if (!hwif->ide_dma_check)
hwif->ide_dma_check = &__ide_dma_check;
- if (!hwif->ide_dma_read)
- hwif->ide_dma_read = &__ide_dma_read;
- if (!hwif->ide_dma_write)
- hwif->ide_dma_write = &__ide_dma_write;
- if (!hwif->ide_dma_begin)
- hwif->ide_dma_begin = &__ide_dma_begin;
+ if (!hwif->dma_setup)
+ hwif->dma_setup = &ide_dma_setup;
+ if (!hwif->dma_exec_cmd)
+ hwif->dma_exec_cmd = &ide_dma_exec_cmd;
+ if (!hwif->dma_start)
+ hwif->dma_start = &ide_dma_start;
if (!hwif->ide_dma_end)
hwif->ide_dma_end = &__ide_dma_end;
if (!hwif->ide_dma_test_irq)
hwif->ide_dma_test_irq = &__ide_dma_test_irq;
- if (!hwif->ide_dma_verbose)
- hwif->ide_dma_verbose = &__ide_dma_verbose;
if (!hwif->ide_dma_timeout)
hwif->ide_dma_timeout = &__ide_dma_timeout;
if (!hwif->ide_dma_lostirq)
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