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Date: Sun, 9 Mar 2008 16:28:22 +0100
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To: linux-ide@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH 1/7] au1xxx-ide: fix MWDMA support
Always use "fast" MWDMA support and remove dma_{black,white}_list
(they were based on completely bogus ->ide_dma_check implementation
which didn't set neither the host controller timings nor the device
for the desired transfer mode).
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
Documentation/mips/AU1xxx_IDE.README | 46 ----------------------------
drivers/ide/mips/au1xxx-ide.c | 49 +-----------------------------
include/asm-mips/mach-au1x00/au1xxx_ide.h | 42 -------------------------
3 files changed, 2 insertions(+), 135 deletions(-)
Index: b/Documentation/mips/AU1xxx_IDE.README
===================================================================
--- a/Documentation/mips/AU1xxx_IDE.README
+++ b/Documentation/mips/AU1xxx_IDE.README
@@ -46,8 +46,6 @@ Two files are introduced:
a) 'include/asm-mips/mach-au1x00/au1xxx_ide.h'
containes : struct _auide_hwif
- struct drive_list_entry dma_white_list
- struct drive_list_entry dma_black_list
timing parameters for PIO mode 0/1/2/3/4
timing parameters for MWDMA 0/1/2
@@ -63,12 +61,6 @@ Four configs variables are introduced:
CONFIG_BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ - maximum transfer size
per descriptor
-If MWDMA is enabled and the connected hard disc is not on the white list, the
-kernel switches to a "safe mwdma mode" at boot time. In this mode the IDE
-performance is substantial slower then in full speed mwdma. In this case
-please add your hard disc to the white list (follow instruction from 'ADD NEW
-HARD DISC TO WHITE OR BLACK LIST' section).
-
SUPPORTED IDE MODES
-------------------
@@ -120,44 +112,6 @@ CONFIG_IDEDMA_AUTO=y
Also undefine 'IDE_AU1XXX_BURSTMODE' in 'drivers/ide/mips/au1xxx-ide.c' to
disable the burst support on DBDMA controller.
-ADD NEW HARD DISC TO WHITE OR BLACK LIST
-----------------------------------------
-
-Step 1 : detect the model name of your hard disc
-
- a) connect your hard disc to the AU1XXX
-
- b) boot your kernel and get the hard disc model.
-
- Example boot log:
-
- --snipped--
- Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
- ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
- Au1xxx IDE(builtin) configured for MWDMA2
- Probing IDE interface ide0...
- hda: Maxtor 6E040L0, ATA DISK drive
- ide0 at 0xac800000-0xac800007,0xac8001c0 on irq 64
- hda: max request size: 64KiB
- hda: 80293248 sectors (41110 MB) w/2048KiB Cache, CHS=65535/16/63, (U)DMA
- --snipped--
-
- In this example 'Maxtor 6E040L0'.
-
-Step 2 : edit 'include/asm-mips/mach-au1x00/au1xxx_ide.h'
-
- Add your hard disc to the dma_white_list or dma_black_list structur.
-
-Step 3 : Recompile the kernel
-
- Enable MWDMA support in the kernel configuration. Recompile the kernel and
- reboot.
-
-Step 4 : Tests
-
- If you have add a hard disc to the white list, please run some stress tests
- for verification.
-
ACKNOWLEDGMENTS
---------------
Index: b/drivers/ide/mips/au1xxx-ide.c
===================================================================
--- a/drivers/ide/mips/au1xxx-ide.c
+++ b/drivers/ide/mips/au1xxx-ide.c
@@ -54,7 +54,6 @@
#define IDE_AU1XXX_BURSTMODE 1
static _auide_hwif auide_hwif;
-static int dbdma_init_done;
#if defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
@@ -320,35 +319,6 @@ static int auide_dma_setup(ide_drive_t *
return 0;
}
-static u8 auide_mdma_filter(ide_drive_t *drive)
-{
- /*
- * FIXME: ->white_list and ->black_list are based on completely bogus
- * ->ide_dma_check implementation which didn't set neither the host
- * controller timings nor the device for the desired transfer mode.
- *
- * They should be either removed or 0x00 MWDMA mask should be
- * returned for devices on the ->black_list.
- */
-
- if (dbdma_init_done == 0) {
- auide_hwif.white_list = ide_in_drive_list(drive->id,
- dma_white_list);
- auide_hwif.black_list = ide_in_drive_list(drive->id,
- dma_black_list);
- auide_hwif.drive = drive;
- auide_ddma_init(&auide_hwif);
- dbdma_init_done = 1;
- }
-
- /* Is the drive in our DMA black list? */
- if (auide_hwif.black_list)
- printk(KERN_WARNING "%s: Disabling DMA for %s (blacklisted)\n",
- drive->name, drive->id->model);
-
- return drive->hwif->mwdma_mask;
-}
-
static int auide_dma_test_irq(ide_drive_t *drive)
{
if (drive->waiting_for_dma == 0)
@@ -425,17 +395,8 @@ static int auide_ddma_init(_auide_hwif *
dev_id = AU1XXX_ATA_DDMA_REQ;
- if (auide->white_list || auide->black_list) {
- tsize = 8;
- devwidth = 32;
- }
- else {
- tsize = 1;
- devwidth = 16;
-
- printk(KERN_ERR "au1xxx-ide: %s is not on ide driver whitelist.\n",auide_hwif.drive->id->model);
- printk(KERN_ERR " please read 'Documentation/mips/AU1xxx_IDE.README'");
- }
+ tsize = 8; /* 1 */
+ devwidth = 32; /* 16 */
#ifdef IDE_AU1XXX_BURSTMODE
flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
@@ -551,9 +512,6 @@ static void auide_setup_ports(hw_regs_t
static const struct ide_port_ops au1xxx_port_ops = {
.set_pio_mode = au1xxx_set_pio_mode,
.set_dma_mode = auide_set_dma_mode,
-#ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
- .mdma_filter = auide_mdma_filter,
-#endif
};
static const struct ide_port_info au1xxx_port_info = {
@@ -652,10 +610,7 @@ static int au_ide_probe(struct device *d
auide_hwif.hwif = hwif;
hwif->hwif_data = &auide_hwif;
-#ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
auide_ddma_init(&auide_hwif);
- dbdma_init_done = 1;
-#endif
idx[0] = hwif->index;
Index: b/include/asm-mips/mach-au1x00/au1xxx_ide.h
===================================================================
--- a/include/asm-mips/mach-au1x00/au1xxx_ide.h
+++ b/include/asm-mips/mach-au1x00/au1xxx_ide.h
@@ -70,7 +70,6 @@ typedef struct
ide_hwif_t *hwif;
#ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
ide_drive_t *drive;
- u8 white_list, black_list;
struct dbdma_cmd *dma_table_cpu;
dma_addr_t dma_table_dma;
#endif
@@ -81,47 +80,6 @@ typedef struct
#endif
} _auide_hwif;
-#ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
-/* HD white list */
-static const struct drive_list_entry dma_white_list [] = {
-/*
- * Hitachi
- */
- { "HITACHI_DK14FA-20" , NULL },
- { "HTS726060M9AT00" , NULL },
-/*
- * Maxtor
- */
- { "Maxtor 6E040L0" , NULL },
- { "Maxtor 6Y080P0" , NULL },
- { "Maxtor 6Y160P0" , NULL },
-/*
- * Seagate
- */
- { "ST3120026A" , NULL },
- { "ST320014A" , NULL },
- { "ST94011A" , NULL },
- { "ST340016A" , NULL },
-/*
- * Western Digital
- */
- { "WDC WD400UE-00HCT0" , NULL },
- { "WDC WD400JB-00JJC0" , NULL },
- { NULL , NULL }
-};
-
-/* HD black list */
-static const struct drive_list_entry dma_black_list [] = {
-/*
- * Western Digital
- */
- { "WDC WD100EB-00CGH0" , NULL },
- { "WDC WD200BB-00AUA1" , NULL },
- { "WDC AC24300L" , NULL },
- { NULL , NULL }
-};
-#endif
-
/* function prototyping */
u8 auide_inb(unsigned long port);
u16 auide_inw(unsigned long port);
--
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