ide-lib.c revision 38789fda295689689d064c0157bc363b1837b5e6 
1#include <linux/types.h>
2#include <linux/string.h>
3#include <linux/kernel.h>
4#include <linux/export.h>
5#include <linux/interrupt.h>
6#include <linux/ide.h>
7#include <linux/bitops.h>
8
9/**
10 *	ide_toggle_bounce	-	handle bounce buffering
11 *	@drive: drive to update
12 *	@on: on/off boolean
13 *
14 *	Enable or disable bounce buffering for the device. Drives move
15 *	between PIO and DMA and that changes the rules we need.
16 */
17
18void ide_toggle_bounce(ide_drive_t *drive, int on)
19{
20	u64 addr = BLK_BOUNCE_HIGH;	/* dma64_addr_t */
21
22	if (!PCI_DMA_BUS_IS_PHYS) {
23		addr = BLK_BOUNCE_ANY;
24	} else if (on && drive->media == ide_disk) {
25		struct device *dev = drive->hwif->dev;
26
27		if (dev && dev->dma_mask)
28			addr = *dev->dma_mask;
29	}
30
31	if (drive->queue)
32		blk_queue_bounce_limit(drive->queue, addr);
33}
34
35u64 ide_get_lba_addr(struct ide_cmd *cmd, int lba48)
36{
37	struct ide_taskfile *tf = &cmd->tf;
38	u32 high, low;
39
40	low  = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
41	if (lba48) {
42		tf = &cmd->hob;
43		high = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
44	} else
45		high = tf->device & 0xf;
46
47	return ((u64)high << 24) | low;
48}
49EXPORT_SYMBOL_GPL(ide_get_lba_addr);
50
51static void ide_dump_sector(ide_drive_t *drive)
52{
53	struct ide_cmd cmd;
54	struct ide_taskfile *tf = &cmd.tf;
55	u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48);
56
57	memset(&cmd, 0, sizeof(cmd));
58	if (lba48) {
59		cmd.valid.in.tf  = IDE_VALID_LBA;
60		cmd.valid.in.hob = IDE_VALID_LBA;
61		cmd.tf_flags = IDE_TFLAG_LBA48;
62	} else
63		cmd.valid.in.tf  = IDE_VALID_LBA | IDE_VALID_DEVICE;
64
65	ide_tf_readback(drive, &cmd);
66
67	if (lba48 || (tf->device & ATA_LBA))
68		printk(KERN_CONT ", LBAsect=%llu",
69			(unsigned long long)ide_get_lba_addr(&cmd, lba48));
70	else
71		printk(KERN_CONT ", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
72			tf->device & 0xf, tf->lbal);
73}
74
75static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
76{
77	printk(KERN_CONT "{ ");
78	if (err & ATA_ABORTED)
79		printk(KERN_CONT "DriveStatusError ");
80	if (err & ATA_ICRC)
81		printk(KERN_CONT "%s",
82			(err & ATA_ABORTED) ? "BadCRC " : "BadSector ");
83	if (err & ATA_UNC)
84		printk(KERN_CONT "UncorrectableError ");
85	if (err & ATA_IDNF)
86		printk(KERN_CONT "SectorIdNotFound ");
87	if (err & ATA_TRK0NF)
88		printk(KERN_CONT "TrackZeroNotFound ");
89	if (err & ATA_AMNF)
90		printk(KERN_CONT "AddrMarkNotFound ");
91	printk(KERN_CONT "}");
92	if ((err & (ATA_BBK | ATA_ABORTED)) == ATA_BBK ||
93	    (err & (ATA_UNC | ATA_IDNF | ATA_AMNF))) {
94		struct request *rq = drive->hwif->rq;
95
96		ide_dump_sector(drive);
97
98		if (rq)
99			printk(KERN_CONT ", sector=%llu",
100			       (unsigned long long)blk_rq_pos(rq));
101	}
102	printk(KERN_CONT "\n");
103}
104
105static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
106{
107	printk(KERN_CONT "{ ");
108	if (err & ATAPI_ILI)
109		printk(KERN_CONT "IllegalLengthIndication ");
110	if (err & ATAPI_EOM)
111		printk(KERN_CONT "EndOfMedia ");
112	if (err & ATA_ABORTED)
113		printk(KERN_CONT "AbortedCommand ");
114	if (err & ATA_MCR)
115		printk(KERN_CONT "MediaChangeRequested ");
116	if (err & ATAPI_LFS)
117		printk(KERN_CONT "LastFailedSense=0x%02x ",
118			(err & ATAPI_LFS) >> 4);
119	printk(KERN_CONT "}\n");
120}
121
122/**
123 *	ide_dump_status		-	translate ATA/ATAPI error
124 *	@drive: drive that status applies to
125 *	@msg: text message to print
126 *	@stat: status byte to decode
127 *
128 *	Error reporting, in human readable form (luxurious, but a memory hog).
129 *	Combines the drive name, message and status byte to provide a
130 *	user understandable explanation of the device error.
131 */
132
133u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
134{
135	u8 err = 0;
136
137	printk(KERN_ERR "%s: %s: status=0x%02x { ", drive->name, msg, stat);
138	if (stat & ATA_BUSY)
139		printk(KERN_CONT "Busy ");
140	else {
141		if (stat & ATA_DRDY)
142			printk(KERN_CONT "DriveReady ");
143		if (stat & ATA_DF)
144			printk(KERN_CONT "DeviceFault ");
145		if (stat & ATA_DSC)
146			printk(KERN_CONT "SeekComplete ");
147		if (stat & ATA_DRQ)
148			printk(KERN_CONT "DataRequest ");
149		if (stat & ATA_CORR)
150			printk(KERN_CONT "CorrectedError ");
151		if (stat & ATA_IDX)
152			printk(KERN_CONT "Index ");
153		if (stat & ATA_ERR)
154			printk(KERN_CONT "Error ");
155	}
156	printk(KERN_CONT "}\n");
157	if ((stat & (ATA_BUSY | ATA_ERR)) == ATA_ERR) {
158		err = ide_read_error(drive);
159		printk(KERN_ERR "%s: %s: error=0x%02x ", drive->name, msg, err);
160		if (drive->media == ide_disk)
161			ide_dump_ata_error(drive, err);
162		else
163			ide_dump_atapi_error(drive, err);
164	}
165
166	printk(KERN_ERR "%s: possibly failed opcode: 0x%02x\n",
167		drive->name, drive->hwif->cmd.tf.command);
168
169	return err;
170}
171EXPORT_SYMBOL(ide_dump_status);
172