ide: move xfer mode tuning code to ide-xfer-mode.c
* Move xfer mode tuning code to ide-xfer-mode.c. * Add CONFIG_IDE_XFER_MODE config option to be selected by host drivers that support xfer mode tuning. * Add CONFIG_IDE_XFER_MODE=n static inline versions of ide_set_pio() and ide_set_xfer_rate(). * Make IDE_TIMINGS and BLK_DEV_IDEDMA config options select IDE_XFER_MODE, also add explicit selects for few host drivers that need it. * Build/link ide-xfer-mode.o and ide-pio-blacklist.o (it is needed only by ide-xfer-mode.o) only if CONFIG_IDE_XFER_MODE=y. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz
parent
11938c9290
commit
7eeaaaa522
@ -56,8 +56,12 @@ if IDE
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comment "Please see Documentation/ide/ide.txt for help/info on IDE drives"
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config IDE_XFER_MODE
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bool
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config IDE_TIMINGS
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bool
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select IDE_XFER_MODE
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config IDE_ATAPI
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bool
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@ -698,6 +702,7 @@ config BLK_DEV_IDE_PMAC_ATA100FIRST
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config BLK_DEV_IDE_AU1XXX
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bool "IDE for AMD Alchemy Au1200"
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depends on SOC_AU1200
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select IDE_XFER_MODE
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choice
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prompt "IDE Mode for AMD Alchemy Au1200"
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default CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
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@ -871,6 +876,7 @@ config BLK_DEV_ALI14XX
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config BLK_DEV_DTC2278
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tristate "DTC-2278 support"
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select IDE_XFER_MODE
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select IDE_LEGACY
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help
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This driver is enabled at runtime using the "dtc2278.probe" kernel
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@ -902,6 +908,7 @@ config BLK_DEV_QD65XX
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config BLK_DEV_UMC8672
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tristate "UMC-8672 support"
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select IDE_XFER_MODE
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select IDE_LEGACY
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help
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This driver is enabled at runtime using the "umc8672.probe" kernel
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@ -915,5 +922,6 @@ endif
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config BLK_DEV_IDEDMA
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def_bool BLK_DEV_IDEDMA_SFF || \
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BLK_DEV_IDEDMA_ICS || BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
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select IDE_XFER_MODE
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endif # IDE
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@ -5,10 +5,10 @@
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EXTRA_CFLAGS += -Idrivers/ide
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ide-core-y += ide.o ide-ioctls.o ide-io.o ide-iops.o ide-lib.o ide-probe.o \
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ide-taskfile.o ide-pm.o ide-park.o ide-pio-blacklist.o \
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ide-sysfs.o ide-devsets.o
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ide-taskfile.o ide-pm.o ide-park.o ide-sysfs.o ide-devsets.o
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# core IDE code
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ide-core-$(CONFIG_IDE_XFER_MODE) += ide-pio-blacklist.o ide-xfer-mode.o
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ide-core-$(CONFIG_IDE_TIMINGS) += ide-timings.o
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ide-core-$(CONFIG_IDE_ATAPI) += ide-atapi.o
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ide-core-$(CONFIG_BLK_DEV_IDEPCI) += setup-pci.o
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@ -5,163 +5,6 @@
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#include <linux/ide.h>
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#include <linux/bitops.h>
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static const char *udma_str[] =
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{ "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44",
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"UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
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static const char *mwdma_str[] =
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{ "MWDMA0", "MWDMA1", "MWDMA2" };
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static const char *swdma_str[] =
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{ "SWDMA0", "SWDMA1", "SWDMA2" };
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static const char *pio_str[] =
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{ "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };
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/**
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* ide_xfer_verbose - return IDE mode names
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* @mode: transfer mode
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*
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* Returns a constant string giving the name of the mode
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* requested.
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*/
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const char *ide_xfer_verbose(u8 mode)
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{
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const char *s;
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u8 i = mode & 0xf;
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if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
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s = udma_str[i];
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else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
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s = mwdma_str[i];
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else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
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s = swdma_str[i];
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else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
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s = pio_str[i & 0x7];
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else if (mode == XFER_PIO_SLOW)
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s = "PIO SLOW";
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else
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s = "XFER ERROR";
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return s;
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}
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EXPORT_SYMBOL(ide_xfer_verbose);
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/**
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* ide_rate_filter - filter transfer mode
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* @drive: IDE device
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* @speed: desired speed
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*
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* Given the available transfer modes this function returns
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* the best available speed at or below the speed requested.
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*
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* TODO: check device PIO capabilities
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*/
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static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
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{
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ide_hwif_t *hwif = drive->hwif;
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u8 mode = ide_find_dma_mode(drive, speed);
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if (mode == 0) {
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if (hwif->pio_mask)
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mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
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else
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mode = XFER_PIO_4;
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}
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/* printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */
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return min(speed, mode);
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}
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/**
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* ide_get_best_pio_mode - get PIO mode from drive
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* @drive: drive to consider
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* @mode_wanted: preferred mode
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* @max_mode: highest allowed mode
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*
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* This routine returns the recommended PIO settings for a given drive,
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* based on the drive->id information and the ide_pio_blacklist[].
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*
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* Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
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* This is used by most chipset support modules when "auto-tuning".
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*/
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u8 ide_get_best_pio_mode(ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
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{
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u16 *id = drive->id;
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int pio_mode = -1, overridden = 0;
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if (mode_wanted != 255)
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return min_t(u8, mode_wanted, max_mode);
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if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0)
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pio_mode = ide_scan_pio_blacklist((char *)&id[ATA_ID_PROD]);
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if (pio_mode != -1) {
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printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
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} else {
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pio_mode = id[ATA_ID_OLD_PIO_MODES] >> 8;
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if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
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pio_mode = 2;
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overridden = 1;
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}
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if (id[ATA_ID_FIELD_VALID] & 2) { /* ATA2? */
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if (ata_id_has_iordy(id)) {
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if (id[ATA_ID_PIO_MODES] & 7) {
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overridden = 0;
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if (id[ATA_ID_PIO_MODES] & 4)
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pio_mode = 5;
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else if (id[ATA_ID_PIO_MODES] & 2)
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pio_mode = 4;
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else
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pio_mode = 3;
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}
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}
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}
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if (overridden)
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printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
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drive->name);
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}
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if (pio_mode > max_mode)
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pio_mode = max_mode;
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return pio_mode;
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}
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EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
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/* req_pio == "255" for auto-tune */
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void ide_set_pio(ide_drive_t *drive, u8 req_pio)
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{
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ide_hwif_t *hwif = drive->hwif;
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const struct ide_port_ops *port_ops = hwif->port_ops;
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u8 host_pio, pio;
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if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
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(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
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return;
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BUG_ON(hwif->pio_mask == 0x00);
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host_pio = fls(hwif->pio_mask) - 1;
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pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
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/*
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* TODO:
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* - report device max PIO mode
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* - check req_pio != 255 against device max PIO mode
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*/
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printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
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drive->name, host_pio, req_pio,
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req_pio == 255 ? "(auto-tune)" : "", pio);
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(void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
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}
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EXPORT_SYMBOL_GPL(ide_set_pio);
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/**
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* ide_toggle_bounce - handle bounce buffering
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* @drive: drive to update
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@ -188,89 +31,6 @@ void ide_toggle_bounce(ide_drive_t *drive, int on)
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blk_queue_bounce_limit(drive->queue, addr);
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}
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int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
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{
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ide_hwif_t *hwif = drive->hwif;
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const struct ide_port_ops *port_ops = hwif->port_ops;
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if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
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return 0;
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if (port_ops == NULL || port_ops->set_pio_mode == NULL)
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return -1;
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/*
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* TODO: temporary hack for some legacy host drivers that didn't
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* set transfer mode on the device in ->set_pio_mode method...
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*/
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if (port_ops->set_dma_mode == NULL) {
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port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
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return 0;
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}
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if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
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if (ide_config_drive_speed(drive, mode))
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return -1;
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port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
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return 0;
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} else {
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port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
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return ide_config_drive_speed(drive, mode);
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}
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}
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int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
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{
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ide_hwif_t *hwif = drive->hwif;
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const struct ide_port_ops *port_ops = hwif->port_ops;
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if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
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return 0;
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if (port_ops == NULL || port_ops->set_dma_mode == NULL)
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return -1;
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if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
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if (ide_config_drive_speed(drive, mode))
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return -1;
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port_ops->set_dma_mode(drive, mode);
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return 0;
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} else {
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port_ops->set_dma_mode(drive, mode);
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return ide_config_drive_speed(drive, mode);
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}
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}
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EXPORT_SYMBOL_GPL(ide_set_dma_mode);
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/**
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* ide_set_xfer_rate - set transfer rate
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* @drive: drive to set
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* @rate: speed to attempt to set
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*
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* General helper for setting the speed of an IDE device. This
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* function knows about user enforced limits from the configuration
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* which ->set_pio_mode/->set_dma_mode does not.
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*/
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int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
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{
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ide_hwif_t *hwif = drive->hwif;
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const struct ide_port_ops *port_ops = hwif->port_ops;
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if (port_ops == NULL || port_ops->set_dma_mode == NULL ||
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(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
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return -1;
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rate = ide_rate_filter(drive, rate);
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BUG_ON(rate < XFER_PIO_0);
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if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
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return ide_set_pio_mode(drive, rate);
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return ide_set_dma_mode(drive, rate);
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}
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static void ide_dump_opcode(ide_drive_t *drive)
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{
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struct request *rq = drive->hwif->rq;
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246
drivers/ide/ide-xfer-mode.c
Normal file
246
drivers/ide/ide-xfer-mode.c
Normal file
@ -0,0 +1,246 @@
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/ide.h>
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#include <linux/bitops.h>
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static const char *udma_str[] =
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{ "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44",
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"UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
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static const char *mwdma_str[] =
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{ "MWDMA0", "MWDMA1", "MWDMA2" };
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static const char *swdma_str[] =
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{ "SWDMA0", "SWDMA1", "SWDMA2" };
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static const char *pio_str[] =
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{ "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };
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/**
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* ide_xfer_verbose - return IDE mode names
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* @mode: transfer mode
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*
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* Returns a constant string giving the name of the mode
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* requested.
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*/
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const char *ide_xfer_verbose(u8 mode)
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{
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const char *s;
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u8 i = mode & 0xf;
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if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
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s = udma_str[i];
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else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
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s = mwdma_str[i];
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else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
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s = swdma_str[i];
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else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
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s = pio_str[i & 0x7];
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else if (mode == XFER_PIO_SLOW)
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s = "PIO SLOW";
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else
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s = "XFER ERROR";
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return s;
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}
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EXPORT_SYMBOL(ide_xfer_verbose);
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/**
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* ide_get_best_pio_mode - get PIO mode from drive
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* @drive: drive to consider
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* @mode_wanted: preferred mode
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* @max_mode: highest allowed mode
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*
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* This routine returns the recommended PIO settings for a given drive,
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* based on the drive->id information and the ide_pio_blacklist[].
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*
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* Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
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* This is used by most chipset support modules when "auto-tuning".
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*/
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u8 ide_get_best_pio_mode(ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
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{
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u16 *id = drive->id;
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int pio_mode = -1, overridden = 0;
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if (mode_wanted != 255)
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return min_t(u8, mode_wanted, max_mode);
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if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0)
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pio_mode = ide_scan_pio_blacklist((char *)&id[ATA_ID_PROD]);
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if (pio_mode != -1) {
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printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
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} else {
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pio_mode = id[ATA_ID_OLD_PIO_MODES] >> 8;
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if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
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pio_mode = 2;
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overridden = 1;
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}
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if (id[ATA_ID_FIELD_VALID] & 2) { /* ATA2? */
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if (ata_id_has_iordy(id)) {
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if (id[ATA_ID_PIO_MODES] & 7) {
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overridden = 0;
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if (id[ATA_ID_PIO_MODES] & 4)
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pio_mode = 5;
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else if (id[ATA_ID_PIO_MODES] & 2)
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pio_mode = 4;
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else
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pio_mode = 3;
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}
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}
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}
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if (overridden)
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printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
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drive->name);
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}
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if (pio_mode > max_mode)
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pio_mode = max_mode;
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return pio_mode;
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}
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EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
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int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
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{
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ide_hwif_t *hwif = drive->hwif;
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const struct ide_port_ops *port_ops = hwif->port_ops;
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if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
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return 0;
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if (port_ops == NULL || port_ops->set_pio_mode == NULL)
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return -1;
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/*
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* TODO: temporary hack for some legacy host drivers that didn't
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* set transfer mode on the device in ->set_pio_mode method...
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*/
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if (port_ops->set_dma_mode == NULL) {
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port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
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||||
return 0;
|
||||
}
|
||||
|
||||
if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
|
||||
if (ide_config_drive_speed(drive, mode))
|
||||
return -1;
|
||||
port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
|
||||
return 0;
|
||||
} else {
|
||||
port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
|
||||
return ide_config_drive_speed(drive, mode);
|
||||
}
|
||||
}
|
||||
|
||||
int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
const struct ide_port_ops *port_ops = hwif->port_ops;
|
||||
|
||||
if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
|
||||
return 0;
|
||||
|
||||
if (port_ops == NULL || port_ops->set_dma_mode == NULL)
|
||||
return -1;
|
||||
|
||||
if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
|
||||
if (ide_config_drive_speed(drive, mode))
|
||||
return -1;
|
||||
port_ops->set_dma_mode(drive, mode);
|
||||
return 0;
|
||||
} else {
|
||||
port_ops->set_dma_mode(drive, mode);
|
||||
return ide_config_drive_speed(drive, mode);
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(ide_set_dma_mode);
|
||||
|
||||
/* req_pio == "255" for auto-tune */
|
||||
void ide_set_pio(ide_drive_t *drive, u8 req_pio)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
const struct ide_port_ops *port_ops = hwif->port_ops;
|
||||
u8 host_pio, pio;
|
||||
|
||||
if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
|
||||
(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
|
||||
return;
|
||||
|
||||
BUG_ON(hwif->pio_mask == 0x00);
|
||||
|
||||
host_pio = fls(hwif->pio_mask) - 1;
|
||||
|
||||
pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
|
||||
|
||||
/*
|
||||
* TODO:
|
||||
* - report device max PIO mode
|
||||
* - check req_pio != 255 against device max PIO mode
|
||||
*/
|
||||
printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
|
||||
drive->name, host_pio, req_pio,
|
||||
req_pio == 255 ? "(auto-tune)" : "", pio);
|
||||
|
||||
(void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(ide_set_pio);
|
||||
|
||||
/**
|
||||
* ide_rate_filter - filter transfer mode
|
||||
* @drive: IDE device
|
||||
* @speed: desired speed
|
||||
*
|
||||
* Given the available transfer modes this function returns
|
||||
* the best available speed at or below the speed requested.
|
||||
*
|
||||
* TODO: check device PIO capabilities
|
||||
*/
|
||||
|
||||
static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
u8 mode = ide_find_dma_mode(drive, speed);
|
||||
|
||||
if (mode == 0) {
|
||||
if (hwif->pio_mask)
|
||||
mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
|
||||
else
|
||||
mode = XFER_PIO_4;
|
||||
}
|
||||
|
||||
/* printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */
|
||||
|
||||
return min(speed, mode);
|
||||
}
|
||||
|
||||
/**
|
||||
* ide_set_xfer_rate - set transfer rate
|
||||
* @drive: drive to set
|
||||
* @rate: speed to attempt to set
|
||||
*
|
||||
* General helper for setting the speed of an IDE device. This
|
||||
* function knows about user enforced limits from the configuration
|
||||
* which ->set_pio_mode/->set_dma_mode does not.
|
||||
*/
|
||||
|
||||
int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
const struct ide_port_ops *port_ops = hwif->port_ops;
|
||||
|
||||
if (port_ops == NULL || port_ops->set_dma_mode == NULL ||
|
||||
(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
|
||||
return -1;
|
||||
|
||||
rate = ide_rate_filter(drive, rate);
|
||||
|
||||
BUG_ON(rate < XFER_PIO_0);
|
||||
|
||||
if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
|
||||
return ide_set_pio_mode(drive, rate);
|
||||
|
||||
return ide_set_dma_mode(drive, rate);
|
||||
}
|
||||
@ -1531,9 +1531,7 @@ static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
|
||||
hwif->hwif_data = data;
|
||||
}
|
||||
|
||||
const char *ide_xfer_verbose(u8 mode);
|
||||
extern void ide_toggle_bounce(ide_drive_t *drive, int on);
|
||||
extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
|
||||
|
||||
u64 ide_get_lba_addr(struct ide_taskfile *, int);
|
||||
u8 ide_dump_status(ide_drive_t *, const char *, u8);
|
||||
@ -1572,14 +1570,18 @@ void ide_timing_merge(struct ide_timing *, struct ide_timing *,
|
||||
struct ide_timing *, unsigned int);
|
||||
int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);
|
||||
|
||||
#ifdef CONFIG_IDE_XFER_MODE
|
||||
int ide_scan_pio_blacklist(char *);
|
||||
|
||||
const char *ide_xfer_verbose(u8);
|
||||
u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
|
||||
|
||||
int ide_set_pio_mode(ide_drive_t *, u8);
|
||||
int ide_set_dma_mode(ide_drive_t *, u8);
|
||||
|
||||
void ide_set_pio(ide_drive_t *, u8);
|
||||
int ide_set_xfer_rate(ide_drive_t *, u8);
|
||||
#else
|
||||
static inline void ide_set_pio(ide_drive_t *drive, u8 pio) { ; }
|
||||
static inline int ide_set_xfer_rate(ide_drive_t *drive, u8 rate) { return -1; }
|
||||
#endif
|
||||
|
||||
static inline void ide_set_max_pio(ide_drive_t *drive)
|
||||
{
|
||||
|
||||
Loading…
Reference in New Issue
Block a user