640 lines
16 KiB
C
640 lines
16 KiB
C
#include <linux/module.h>
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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/timer.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/major.h>
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#include <linux/errno.h>
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#include <linux/genhd.h>
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#include <linux/blkpg.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/hdreg.h>
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#include <linux/ide.h>
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#include <linux/bitops.h>
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#include <asm/byteorder.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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/*
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* IDE library routines. These are plug in code that most
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* drivers can use but occasionally may be weird enough
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* to want to do their own thing with
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*
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* Add common non I/O op stuff here. Make sure it has proper
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* kernel-doc function headers or your patch will be rejected
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*/
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/**
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* ide_xfer_verbose - return IDE mode names
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* @xfer_rate: rate to name
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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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char *ide_xfer_verbose (u8 xfer_rate)
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{
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switch(xfer_rate) {
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case XFER_UDMA_7: return("UDMA 7");
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case XFER_UDMA_6: return("UDMA 6");
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case XFER_UDMA_5: return("UDMA 5");
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case XFER_UDMA_4: return("UDMA 4");
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case XFER_UDMA_3: return("UDMA 3");
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case XFER_UDMA_2: return("UDMA 2");
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case XFER_UDMA_1: return("UDMA 1");
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case XFER_UDMA_0: return("UDMA 0");
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case XFER_MW_DMA_2: return("MW DMA 2");
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case XFER_MW_DMA_1: return("MW DMA 1");
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case XFER_MW_DMA_0: return("MW DMA 0");
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case XFER_SW_DMA_2: return("SW DMA 2");
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case XFER_SW_DMA_1: return("SW DMA 1");
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case XFER_SW_DMA_0: return("SW DMA 0");
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case XFER_PIO_4: return("PIO 4");
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case XFER_PIO_3: return("PIO 3");
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case XFER_PIO_2: return("PIO 2");
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case XFER_PIO_1: return("PIO 1");
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case XFER_PIO_0: return("PIO 0");
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case XFER_PIO_SLOW: return("PIO SLOW");
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default: return("XFER ERROR");
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}
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}
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EXPORT_SYMBOL(ide_xfer_verbose);
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/**
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* ide_dma_speed - compute DMA speed
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* @drive: drive
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* @mode: modes available
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*
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* Checks the drive capabilities and returns the speed to use
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* for the DMA transfer. Returns 0 if the drive is incapable
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* of DMA transfers.
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*/
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u8 ide_dma_speed(ide_drive_t *drive, u8 mode)
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{
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struct hd_driveid *id = drive->id;
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ide_hwif_t *hwif = HWIF(drive);
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u8 ultra_mask, mwdma_mask, swdma_mask;
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u8 speed = 0;
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if (drive->media != ide_disk && hwif->atapi_dma == 0)
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return 0;
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/* Capable of UltraDMA modes? */
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ultra_mask = id->dma_ultra & hwif->ultra_mask;
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if (!(id->field_valid & 4))
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mode = 0; /* fallback to MW/SW DMA if no UltraDMA */
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switch (mode) {
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case 4:
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if (ultra_mask & 0x40) {
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speed = XFER_UDMA_6;
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break;
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}
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case 3:
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if (ultra_mask & 0x20) {
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speed = XFER_UDMA_5;
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break;
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}
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case 2:
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if (ultra_mask & 0x10) {
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speed = XFER_UDMA_4;
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break;
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}
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if (ultra_mask & 0x08) {
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speed = XFER_UDMA_3;
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break;
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}
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case 1:
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if (ultra_mask & 0x04) {
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speed = XFER_UDMA_2;
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break;
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}
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if (ultra_mask & 0x02) {
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speed = XFER_UDMA_1;
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break;
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}
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if (ultra_mask & 0x01) {
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speed = XFER_UDMA_0;
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break;
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}
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case 0:
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mwdma_mask = id->dma_mword & hwif->mwdma_mask;
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if (mwdma_mask & 0x04) {
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speed = XFER_MW_DMA_2;
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break;
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}
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if (mwdma_mask & 0x02) {
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speed = XFER_MW_DMA_1;
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break;
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}
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if (mwdma_mask & 0x01) {
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speed = XFER_MW_DMA_0;
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break;
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}
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swdma_mask = id->dma_1word & hwif->swdma_mask;
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if (swdma_mask & 0x04) {
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speed = XFER_SW_DMA_2;
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break;
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}
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if (swdma_mask & 0x02) {
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speed = XFER_SW_DMA_1;
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break;
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}
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if (swdma_mask & 0x01) {
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speed = XFER_SW_DMA_0;
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break;
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}
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}
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return speed;
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}
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EXPORT_SYMBOL(ide_dma_speed);
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/**
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* ide_rate_filter - return best speed for mode
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* @mode: modes available
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* @speed: desired speed
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*
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* Given the available DMA/UDMA mode 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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u8 ide_rate_filter (u8 mode, u8 speed)
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{
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#ifdef CONFIG_BLK_DEV_IDEDMA
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static u8 speed_max[] = {
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XFER_MW_DMA_2, XFER_UDMA_2, XFER_UDMA_4,
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XFER_UDMA_5, XFER_UDMA_6
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};
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// printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
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/* So that we remember to update this if new modes appear */
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BUG_ON(mode > 4);
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return min(speed, speed_max[mode]);
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#else /* !CONFIG_BLK_DEV_IDEDMA */
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return min(speed, (u8)XFER_PIO_4);
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#endif /* CONFIG_BLK_DEV_IDEDMA */
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}
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EXPORT_SYMBOL(ide_rate_filter);
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int ide_dma_enable (ide_drive_t *drive)
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{
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ide_hwif_t *hwif = HWIF(drive);
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struct hd_driveid *id = drive->id;
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return ((int) ((((id->dma_ultra >> 8) & hwif->ultra_mask) ||
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((id->dma_mword >> 8) & hwif->mwdma_mask) ||
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((id->dma_1word >> 8) & hwif->swdma_mask)) ? 1 : 0));
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}
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EXPORT_SYMBOL(ide_dma_enable);
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/*
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* Standard (generic) timings for PIO modes, from ATA2 specification.
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* These timings are for access to the IDE data port register *only*.
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* Some drives may specify a mode, while also specifying a different
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* value for cycle_time (from drive identification data).
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*/
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const ide_pio_timings_t ide_pio_timings[6] = {
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{ 70, 165, 600 }, /* PIO Mode 0 */
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{ 50, 125, 383 }, /* PIO Mode 1 */
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{ 30, 100, 240 }, /* PIO Mode 2 */
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{ 30, 80, 180 }, /* PIO Mode 3 with IORDY */
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{ 25, 70, 120 }, /* PIO Mode 4 with IORDY */
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{ 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */
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};
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EXPORT_SYMBOL_GPL(ide_pio_timings);
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/*
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* Shared data/functions for determining best PIO mode for an IDE drive.
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* Most of this stuff originally lived in cmd640.c, and changes to the
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* ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
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* breaking the fragile cmd640.c support.
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*/
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/*
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* Black list. Some drives incorrectly report their maximal PIO mode,
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* at least in respect to CMD640. Here we keep info on some known drives.
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*/
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static struct ide_pio_info {
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const char *name;
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int pio;
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} ide_pio_blacklist [] = {
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/* { "Conner Peripherals 1275MB - CFS1275A", 4 }, */
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{ "Conner Peripherals 540MB - CFS540A", 3 },
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{ "WDC AC2700", 3 },
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{ "WDC AC2540", 3 },
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{ "WDC AC2420", 3 },
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{ "WDC AC2340", 3 },
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{ "WDC AC2250", 0 },
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{ "WDC AC2200", 0 },
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{ "WDC AC21200", 4 },
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{ "WDC AC2120", 0 },
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{ "WDC AC2850", 3 },
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{ "WDC AC1270", 3 },
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{ "WDC AC1170", 1 },
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{ "WDC AC1210", 1 },
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{ "WDC AC280", 0 },
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/* { "WDC AC21000", 4 }, */
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{ "WDC AC31000", 3 },
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{ "WDC AC31200", 3 },
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/* { "WDC AC31600", 4 }, */
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{ "Maxtor 7131 AT", 1 },
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{ "Maxtor 7171 AT", 1 },
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{ "Maxtor 7213 AT", 1 },
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{ "Maxtor 7245 AT", 1 },
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{ "Maxtor 7345 AT", 1 },
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{ "Maxtor 7546 AT", 3 },
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{ "Maxtor 7540 AV", 3 },
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{ "SAMSUNG SHD-3121A", 1 },
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{ "SAMSUNG SHD-3122A", 1 },
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{ "SAMSUNG SHD-3172A", 1 },
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/* { "ST51080A", 4 },
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* { "ST51270A", 4 },
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* { "ST31220A", 4 },
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* { "ST31640A", 4 },
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* { "ST32140A", 4 },
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* { "ST3780A", 4 },
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*/
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{ "ST5660A", 3 },
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{ "ST3660A", 3 },
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{ "ST3630A", 3 },
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{ "ST3655A", 3 },
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{ "ST3391A", 3 },
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{ "ST3390A", 1 },
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{ "ST3600A", 1 },
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{ "ST3290A", 0 },
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{ "ST3144A", 0 },
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{ "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
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/* drive) according to Seagates FIND-ATA program */
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{ "QUANTUM ELS127A", 0 },
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{ "QUANTUM ELS170A", 0 },
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{ "QUANTUM LPS240A", 0 },
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{ "QUANTUM LPS210A", 3 },
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{ "QUANTUM LPS270A", 3 },
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{ "QUANTUM LPS365A", 3 },
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{ "QUANTUM LPS540A", 3 },
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{ "QUANTUM LIGHTNING 540A", 3 },
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{ "QUANTUM LIGHTNING 730A", 3 },
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{ "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
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{ "QUANTUM FIREBALL_640", 3 },
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{ "QUANTUM FIREBALL_1080", 3 },
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{ "QUANTUM FIREBALL_1280", 3 },
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{ NULL, 0 }
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};
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/**
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* ide_scan_pio_blacklist - check for a blacklisted drive
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* @model: Drive model string
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*
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* This routine searches the ide_pio_blacklist for an entry
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* matching the start/whole of the supplied model name.
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*
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* Returns -1 if no match found.
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* Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
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*/
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static int ide_scan_pio_blacklist (char *model)
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{
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struct ide_pio_info *p;
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for (p = ide_pio_blacklist; p->name != NULL; p++) {
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if (strncmp(p->name, model, strlen(p->name)) == 0)
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return p->pio;
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}
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return -1;
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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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* @driver: drive to consider
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* @mode_wanted: preferred mode
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* @max_mode: highest allowed
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* @d: pio data
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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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* This is used by most chipset support modules when "auto-tuning".
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*
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* Drive PIO mode auto selection
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*/
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u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d)
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{
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int pio_mode;
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int cycle_time = 0;
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int use_iordy = 0;
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struct hd_driveid* id = drive->id;
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int overridden = 0;
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int blacklisted = 0;
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if (mode_wanted != 255) {
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pio_mode = mode_wanted;
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} else if (!drive->id) {
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pio_mode = 0;
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} else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
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overridden = 1;
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blacklisted = 1;
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use_iordy = (pio_mode > 2);
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} else {
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pio_mode = id->tPIO;
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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->field_valid & 2) { /* drive implements ATA2? */
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if (id->capability & 8) { /* drive supports use_iordy? */
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use_iordy = 1;
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cycle_time = id->eide_pio_iordy;
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if (id->eide_pio_modes & 7) {
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overridden = 0;
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if (id->eide_pio_modes & 4)
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pio_mode = 5;
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else if (id->eide_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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} else {
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cycle_time = id->eide_pio;
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}
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}
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#if 0
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if (drive->id->major_rev_num & 0x0004) printk("ATA-2 ");
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#endif
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/*
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* Conservative "downgrade" for all pre-ATA2 drives
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*/
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if (pio_mode && pio_mode < 4) {
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pio_mode--;
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overridden = 1;
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#if 0
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use_iordy = (pio_mode > 2);
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#endif
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if (cycle_time && cycle_time < ide_pio_timings[pio_mode].cycle_time)
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cycle_time = 0; /* use standard timing */
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}
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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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cycle_time = 0;
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}
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if (d) {
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d->pio_mode = pio_mode;
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d->cycle_time = cycle_time ? cycle_time : ide_pio_timings[pio_mode].cycle_time;
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d->use_iordy = use_iordy;
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d->overridden = overridden;
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d->blacklisted = blacklisted;
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}
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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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/**
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* ide_toggle_bounce - handle bounce buffering
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* @drive: drive to update
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* @on: on/off boolean
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*
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* Enable or disable bounce buffering for the device. Drives move
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* between PIO and DMA and that changes the rules we need.
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*/
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void ide_toggle_bounce(ide_drive_t *drive, int on)
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{
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u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
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if (!PCI_DMA_BUS_IS_PHYS) {
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addr = BLK_BOUNCE_ANY;
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} else if (on && drive->media == ide_disk) {
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if (HWIF(drive)->pci_dev)
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addr = HWIF(drive)->pci_dev->dma_mask;
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}
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if (drive->queue)
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blk_queue_bounce_limit(drive->queue, addr);
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}
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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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* @speed: 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 speedproc() does not. High level drivers should never
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* invoke speedproc() directly.
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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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#ifndef CONFIG_BLK_DEV_IDEDMA
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rate = min(rate, (u8) XFER_PIO_4);
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#endif
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if(HWIF(drive)->speedproc)
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return HWIF(drive)->speedproc(drive, rate);
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else
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return -1;
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}
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EXPORT_SYMBOL_GPL(ide_set_xfer_rate);
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static void ide_dump_opcode(ide_drive_t *drive)
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{
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struct request *rq;
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u8 opcode = 0;
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int found = 0;
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spin_lock(&ide_lock);
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rq = NULL;
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if (HWGROUP(drive))
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rq = HWGROUP(drive)->rq;
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spin_unlock(&ide_lock);
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if (!rq)
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return;
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if (rq->cmd_type == REQ_TYPE_ATA_CMD ||
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rq->cmd_type == REQ_TYPE_ATA_TASK) {
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char *args = rq->buffer;
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if (args) {
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opcode = args[0];
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found = 1;
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}
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} else if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
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ide_task_t *args = rq->special;
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if (args) {
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task_struct_t *tf = (task_struct_t *) args->tfRegister;
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opcode = tf->command;
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found = 1;
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}
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}
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printk("ide: failed opcode was: ");
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if (!found)
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printk("unknown\n");
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else
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printk("0x%02x\n", opcode);
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}
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static u8 ide_dump_ata_status(ide_drive_t *drive, const char *msg, u8 stat)
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{
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ide_hwif_t *hwif = HWIF(drive);
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unsigned long flags;
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u8 err = 0;
|
|
|
|
local_irq_save(flags);
|
|
printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
|
|
if (stat & BUSY_STAT)
|
|
printk("Busy ");
|
|
else {
|
|
if (stat & READY_STAT) printk("DriveReady ");
|
|
if (stat & WRERR_STAT) printk("DeviceFault ");
|
|
if (stat & SEEK_STAT) printk("SeekComplete ");
|
|
if (stat & DRQ_STAT) printk("DataRequest ");
|
|
if (stat & ECC_STAT) printk("CorrectedError ");
|
|
if (stat & INDEX_STAT) printk("Index ");
|
|
if (stat & ERR_STAT) printk("Error ");
|
|
}
|
|
printk("}\n");
|
|
if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
|
|
err = hwif->INB(IDE_ERROR_REG);
|
|
printk("%s: %s: error=0x%02x { ", drive->name, msg, err);
|
|
if (err & ABRT_ERR) printk("DriveStatusError ");
|
|
if (err & ICRC_ERR)
|
|
printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
|
|
if (err & ECC_ERR) printk("UncorrectableError ");
|
|
if (err & ID_ERR) printk("SectorIdNotFound ");
|
|
if (err & TRK0_ERR) printk("TrackZeroNotFound ");
|
|
if (err & MARK_ERR) printk("AddrMarkNotFound ");
|
|
printk("}");
|
|
if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
|
|
(err & (ECC_ERR|ID_ERR|MARK_ERR))) {
|
|
if (drive->addressing == 1) {
|
|
__u64 sectors = 0;
|
|
u32 low = 0, high = 0;
|
|
low = ide_read_24(drive);
|
|
hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG);
|
|
high = ide_read_24(drive);
|
|
sectors = ((__u64)high << 24) | low;
|
|
printk(", LBAsect=%llu, high=%d, low=%d",
|
|
(unsigned long long) sectors,
|
|
high, low);
|
|
} else {
|
|
u8 cur = hwif->INB(IDE_SELECT_REG);
|
|
if (cur & 0x40) { /* using LBA? */
|
|
printk(", LBAsect=%ld", (unsigned long)
|
|
((cur&0xf)<<24)
|
|
|(hwif->INB(IDE_HCYL_REG)<<16)
|
|
|(hwif->INB(IDE_LCYL_REG)<<8)
|
|
| hwif->INB(IDE_SECTOR_REG));
|
|
} else {
|
|
printk(", CHS=%d/%d/%d",
|
|
(hwif->INB(IDE_HCYL_REG)<<8) +
|
|
hwif->INB(IDE_LCYL_REG),
|
|
cur & 0xf,
|
|
hwif->INB(IDE_SECTOR_REG));
|
|
}
|
|
}
|
|
if (HWGROUP(drive) && HWGROUP(drive)->rq)
|
|
printk(", sector=%llu",
|
|
(unsigned long long)HWGROUP(drive)->rq->sector);
|
|
}
|
|
printk("\n");
|
|
}
|
|
ide_dump_opcode(drive);
|
|
local_irq_restore(flags);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ide_dump_atapi_status - print human readable atapi status
|
|
* @drive: drive that status applies to
|
|
* @msg: text message to print
|
|
* @stat: status byte to decode
|
|
*
|
|
* Error reporting, in human readable form (luxurious, but a memory hog).
|
|
*/
|
|
|
|
static u8 ide_dump_atapi_status(ide_drive_t *drive, const char *msg, u8 stat)
|
|
{
|
|
unsigned long flags;
|
|
|
|
atapi_status_t status;
|
|
atapi_error_t error;
|
|
|
|
status.all = stat;
|
|
error.all = 0;
|
|
local_irq_save(flags);
|
|
printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
|
|
if (status.b.bsy)
|
|
printk("Busy ");
|
|
else {
|
|
if (status.b.drdy) printk("DriveReady ");
|
|
if (status.b.df) printk("DeviceFault ");
|
|
if (status.b.dsc) printk("SeekComplete ");
|
|
if (status.b.drq) printk("DataRequest ");
|
|
if (status.b.corr) printk("CorrectedError ");
|
|
if (status.b.idx) printk("Index ");
|
|
if (status.b.check) printk("Error ");
|
|
}
|
|
printk("}\n");
|
|
if (status.b.check && !status.b.bsy) {
|
|
error.all = HWIF(drive)->INB(IDE_ERROR_REG);
|
|
printk("%s: %s: error=0x%02x { ", drive->name, msg, error.all);
|
|
if (error.b.ili) printk("IllegalLengthIndication ");
|
|
if (error.b.eom) printk("EndOfMedia ");
|
|
if (error.b.abrt) printk("AbortedCommand ");
|
|
if (error.b.mcr) printk("MediaChangeRequested ");
|
|
if (error.b.sense_key) printk("LastFailedSense=0x%02x ",
|
|
error.b.sense_key);
|
|
printk("}\n");
|
|
}
|
|
ide_dump_opcode(drive);
|
|
local_irq_restore(flags);
|
|
return error.all;
|
|
}
|
|
|
|
/**
|
|
* ide_dump_status - translate ATA/ATAPI error
|
|
* @drive: drive the error occured on
|
|
* @msg: information string
|
|
* @stat: status byte
|
|
*
|
|
* Error reporting, in human readable form (luxurious, but a memory hog).
|
|
* Combines the drive name, message and status byte to provide a
|
|
* user understandable explanation of the device error.
|
|
*/
|
|
|
|
u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
|
|
{
|
|
if (drive->media == ide_disk)
|
|
return ide_dump_ata_status(drive, msg, stat);
|
|
return ide_dump_atapi_status(drive, msg, stat);
|
|
}
|
|
|
|
EXPORT_SYMBOL(ide_dump_status);
|