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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 
ide_toggle_bounce(ide_drive_t * drive,int on)18 void 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 
ide_get_lba_addr(struct ide_cmd * cmd,int lba48)35 u64 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 }
49 EXPORT_SYMBOL_GPL(ide_get_lba_addr);
50 
ide_dump_sector(ide_drive_t * drive)51 static 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 
ide_dump_ata_error(ide_drive_t * drive,u8 err)75 static 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 
ide_dump_atapi_error(ide_drive_t * drive,u8 err)105 static 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 
ide_dump_status(ide_drive_t * drive,const char * msg,u8 stat)133 u8 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 }
171 EXPORT_SYMBOL(ide_dump_status);
172