aboutsummaryrefslogtreecommitdiff
path: root/drivers/ide/ide-dma.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/ide/ide-dma.c')
-rw-r--r--drivers/ide/ide-dma.c110
1 files changed, 54 insertions, 56 deletions
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 5bf32038dc4..7beaf1e9be1 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -1,15 +1,13 @@
/*
- * linux/drivers/ide/ide-dma.c Version 4.10 June 9, 2000
+ * Copyright (C) 1995-1998 Mark Lord
+ * Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2004, 2007 Bartlomiej Zolnierkiewicz
*
- * Copyright (c) 1999-2000 Andre Hedrick <andre@linux-ide.org>
* May be copied or modified under the terms of the GNU General Public License
*/
/*
* Special Thanks to Mark for his Six years of work.
- *
- * Copyright (c) 1995-1998 Mark Lord
- * May be copied or modified under the terms of the GNU General Public License
*/
/*
@@ -85,6 +83,7 @@
#include <linux/ide.h>
#include <linux/delay.h>
#include <linux/scatterlist.h>
+#include <linux/dma-mapping.h>
#include <asm/io.h>
#include <asm/irq.h>
@@ -169,16 +168,15 @@ static int ide_dma_good_drive(ide_drive_t *drive)
return ide_in_drive_list(drive->id, drive_whitelist);
}
-#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
* @rq: the request holding the sg list
*
- * Perform the PCI mapping magic necessary to access the source or
- * target buffers of a request via PCI DMA. The lower layers of the
+ * Perform the DMA mapping magic necessary to access the source or
+ * target buffers of a request via DMA. The lower layers of the
* kernel provide the necessary cache management so that we can
- * operate in a portable fashion
+ * operate in a portable fashion.
*/
int ide_build_sglist(ide_drive_t *drive, struct request *rq)
@@ -186,20 +184,20 @@ int ide_build_sglist(ide_drive_t *drive, struct request *rq)
ide_hwif_t *hwif = HWIF(drive);
struct scatterlist *sg = hwif->sg_table;
- BUG_ON((rq->cmd_type == REQ_TYPE_ATA_TASKFILE) && rq->nr_sectors > 256);
-
ide_map_sg(drive, rq);
if (rq_data_dir(rq) == READ)
- hwif->sg_dma_direction = PCI_DMA_FROMDEVICE;
+ hwif->sg_dma_direction = DMA_FROM_DEVICE;
else
- hwif->sg_dma_direction = PCI_DMA_TODEVICE;
+ hwif->sg_dma_direction = DMA_TO_DEVICE;
- return pci_map_sg(hwif->pci_dev, sg, hwif->sg_nents, hwif->sg_dma_direction);
+ 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_PCI
/**
* ide_build_dmatable - build IDE DMA table
*
@@ -284,16 +282,17 @@ int ide_build_dmatable (ide_drive_t *drive, struct request *rq)
*--table |= cpu_to_le32(0x80000000);
return count;
}
+
printk(KERN_ERR "%s: empty DMA table?\n", drive->name);
+
use_pio_instead:
- pci_unmap_sg(hwif->pci_dev,
- hwif->sg_table,
- hwif->sg_nents,
- hwif->sg_dma_direction);
+ ide_destroy_dmatable(drive);
+
return 0; /* revert to PIO for this request */
}
EXPORT_SYMBOL_GPL(ide_build_dmatable);
+#endif
/**
* ide_destroy_dmatable - clean up DMA mapping
@@ -308,15 +307,15 @@ EXPORT_SYMBOL_GPL(ide_build_dmatable);
void ide_destroy_dmatable (ide_drive_t *drive)
{
- struct pci_dev *dev = HWIF(drive)->pci_dev;
- struct scatterlist *sg = HWIF(drive)->sg_table;
- int nents = HWIF(drive)->sg_nents;
+ ide_hwif_t *hwif = drive->hwif;
- pci_unmap_sg(dev, sg, nents, HWIF(drive)->sg_dma_direction);
+ 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_PCI
/**
* config_drive_for_dma - attempt to activate IDE DMA
* @drive: the drive to place in DMA mode
@@ -474,8 +473,6 @@ void ide_dma_on(ide_drive_t *drive)
drive->hwif->dma_host_set(drive, 1);
}
-EXPORT_SYMBOL(ide_dma_on);
-
#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
/**
* ide_dma_setup - begin a DMA phase
@@ -847,10 +844,10 @@ EXPORT_SYMBOL(ide_dma_timeout);
static void ide_release_dma_engine(ide_hwif_t *hwif)
{
if (hwif->dmatable_cpu) {
- pci_free_consistent(hwif->pci_dev,
- PRD_ENTRIES * PRD_BYTES,
- hwif->dmatable_cpu,
- hwif->dmatable_dma);
+ struct pci_dev *pdev = to_pci_dev(hwif->dev);
+
+ pci_free_consistent(pdev, PRD_ENTRIES * PRD_BYTES,
+ hwif->dmatable_cpu, hwif->dmatable_dma);
hwif->dmatable_cpu = NULL;
}
}
@@ -878,7 +875,9 @@ int ide_release_dma(ide_hwif_t *hwif)
static int ide_allocate_dma_engine(ide_hwif_t *hwif)
{
- hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev,
+ struct pci_dev *pdev = to_pci_dev(hwif->dev);
+
+ hwif->dmatable_cpu = pci_alloc_consistent(pdev,
PRD_ENTRIES * PRD_BYTES,
&hwif->dmatable_dma);
@@ -891,19 +890,19 @@ static int ide_allocate_dma_engine(ide_hwif_t *hwif)
return 1;
}
-static 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)
{
printk(KERN_INFO " %s: MMIO-DMA ", hwif->name);
return 0;
}
-static 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)
{
printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx",
- hwif->name, base, base + ports - 1);
+ hwif->name, base, base + 7);
- if (!request_region(base, ports, hwif->name)) {
+ if (!request_region(base, 8, hwif->name)) {
printk(" -- Error, ports in use.\n");
return 1;
}
@@ -915,7 +914,7 @@ static int ide_iomio_dma(ide_hwif_t *hwif, unsigned long base, unsigned int port
if (!request_region(hwif->extra_base,
hwif->cds->extra, hwif->cds->name)) {
printk(" -- Error, extra ports in use.\n");
- release_region(base, ports);
+ release_region(base, 8);
return 1;
}
hwif->extra_ports = hwif->cds->extra;
@@ -925,17 +924,19 @@ static int ide_iomio_dma(ide_hwif_t *hwif, unsigned long base, unsigned int port
return 0;
}
-static 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)
{
if (hwif->mmio)
- return ide_mapped_mmio_dma(hwif, base,ports);
+ return ide_mapped_mmio_dma(hwif, base);
- return ide_iomio_dma(hwif, base, ports);
+ return ide_iomio_dma(hwif, base);
}
-void ide_setup_dma(ide_hwif_t *hwif, unsigned long base, unsigned num_ports)
+void ide_setup_dma(ide_hwif_t *hwif, unsigned long base)
{
- if (ide_dma_iobase(hwif, base, num_ports))
+ u8 dma_stat;
+
+ if (ide_dma_iobase(hwif, base))
return;
if (ide_allocate_dma_engine(hwif)) {
@@ -945,16 +946,16 @@ void ide_setup_dma(ide_hwif_t *hwif, unsigned long base, unsigned num_ports)
hwif->dma_base = base;
- if (!(hwif->dma_command))
- hwif->dma_command = hwif->dma_base;
- if (!(hwif->dma_vendor1))
- hwif->dma_vendor1 = (hwif->dma_base + 1);
- if (!(hwif->dma_status))
- hwif->dma_status = (hwif->dma_base + 2);
- if (!(hwif->dma_vendor3))
- hwif->dma_vendor3 = (hwif->dma_base + 3);
- if (!(hwif->dma_prdtable))
- hwif->dma_prdtable = (hwif->dma_base + 4);
+ if (!hwif->dma_command)
+ hwif->dma_command = hwif->dma_base + 0;
+ if (!hwif->dma_vendor1)
+ hwif->dma_vendor1 = hwif->dma_base + 1;
+ if (!hwif->dma_status)
+ hwif->dma_status = hwif->dma_base + 2;
+ if (!hwif->dma_vendor3)
+ hwif->dma_vendor3 = hwif->dma_base + 3;
+ if (!hwif->dma_prdtable)
+ hwif->dma_prdtable = hwif->dma_base + 4;
if (!hwif->dma_host_set)
hwif->dma_host_set = &ide_dma_host_set;
@@ -973,13 +974,10 @@ void ide_setup_dma(ide_hwif_t *hwif, unsigned long base, unsigned num_ports)
if (!hwif->dma_lost_irq)
hwif->dma_lost_irq = &ide_dma_lost_irq;
- if (hwif->chipset != ide_trm290) {
- u8 dma_stat = hwif->INB(hwif->dma_status);
- printk(", BIOS settings: %s:%s, %s:%s",
- hwif->drives[0].name, (dma_stat & 0x20) ? "DMA" : "pio",
- hwif->drives[1].name, (dma_stat & 0x40) ? "DMA" : "pio");
- }
- printk("\n");
+ dma_stat = hwif->INB(hwif->dma_status);
+ printk(KERN_CONT ", BIOS settings: %s:%s, %s:%s\n",
+ hwif->drives[0].name, (dma_stat & 0x20) ? "DMA" : "PIO",
+ hwif->drives[1].name, (dma_stat & 0x40) ? "DMA" : "PIO");
}
EXPORT_SYMBOL_GPL(ide_setup_dma);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 07:38:04 +0000