2 * ahci.c - AHCI SATA support
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2004-2005 Red Hat, Inc.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; see the file COPYING. If not, write to
23 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
26 * libata documentation is available via 'make {ps|pdf}docs',
27 * as Documentation/DocBook/libata.*
29 * AHCI hardware documentation:
30 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
31 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/pci.h>
38 #include <linux/init.h>
39 #include <linux/blkdev.h>
40 #include <linux/delay.h>
41 #include <linux/interrupt.h>
42 #include <linux/sched.h>
43 #include <linux/dma-mapping.h>
44 #include <linux/device.h>
45 #include <scsi/scsi_host.h>
46 #include <scsi/scsi_cmnd.h>
47 #include <linux/libata.h>
50 #define DRV_NAME "ahci"
51 #define DRV_VERSION "1.3"
56 AHCI_MAX_SG
= 168, /* hardware max is 64K */
57 AHCI_DMA_BOUNDARY
= 0xffffffff,
58 AHCI_USE_CLUSTERING
= 0,
59 AHCI_CMD_SLOT_SZ
= 32 * 32,
61 AHCI_CMD_TBL_HDR
= 0x80,
62 AHCI_CMD_TBL_CDB
= 0x40,
63 AHCI_CMD_TBL_SZ
= AHCI_CMD_TBL_HDR
+ (AHCI_MAX_SG
* 16),
64 AHCI_PORT_PRIV_DMA_SZ
= AHCI_CMD_SLOT_SZ
+ AHCI_CMD_TBL_SZ
+
66 AHCI_IRQ_ON_SG
= (1 << 31),
67 AHCI_CMD_ATAPI
= (1 << 5),
68 AHCI_CMD_WRITE
= (1 << 6),
69 AHCI_CMD_PREFETCH
= (1 << 7),
70 AHCI_CMD_RESET
= (1 << 8),
71 AHCI_CMD_CLR_BUSY
= (1 << 10),
73 RX_FIS_D2H_REG
= 0x40, /* offset of D2H Register FIS data */
77 /* global controller registers */
78 HOST_CAP
= 0x00, /* host capabilities */
79 HOST_CTL
= 0x04, /* global host control */
80 HOST_IRQ_STAT
= 0x08, /* interrupt status */
81 HOST_PORTS_IMPL
= 0x0c, /* bitmap of implemented ports */
82 HOST_VERSION
= 0x10, /* AHCI spec. version compliancy */
85 HOST_RESET
= (1 << 0), /* reset controller; self-clear */
86 HOST_IRQ_EN
= (1 << 1), /* global IRQ enable */
87 HOST_AHCI_EN
= (1 << 31), /* AHCI enabled */
90 HOST_CAP_64
= (1 << 31), /* PCI DAC (64-bit DMA) support */
91 HOST_CAP_CLO
= (1 << 24), /* Command List Override support */
93 /* registers for each SATA port */
94 PORT_LST_ADDR
= 0x00, /* command list DMA addr */
95 PORT_LST_ADDR_HI
= 0x04, /* command list DMA addr hi */
96 PORT_FIS_ADDR
= 0x08, /* FIS rx buf addr */
97 PORT_FIS_ADDR_HI
= 0x0c, /* FIS rx buf addr hi */
98 PORT_IRQ_STAT
= 0x10, /* interrupt status */
99 PORT_IRQ_MASK
= 0x14, /* interrupt enable/disable mask */
100 PORT_CMD
= 0x18, /* port command */
101 PORT_TFDATA
= 0x20, /* taskfile data */
102 PORT_SIG
= 0x24, /* device TF signature */
103 PORT_CMD_ISSUE
= 0x38, /* command issue */
104 PORT_SCR
= 0x28, /* SATA phy register block */
105 PORT_SCR_STAT
= 0x28, /* SATA phy register: SStatus */
106 PORT_SCR_CTL
= 0x2c, /* SATA phy register: SControl */
107 PORT_SCR_ERR
= 0x30, /* SATA phy register: SError */
108 PORT_SCR_ACT
= 0x34, /* SATA phy register: SActive */
110 /* PORT_IRQ_{STAT,MASK} bits */
111 PORT_IRQ_COLD_PRES
= (1 << 31), /* cold presence detect */
112 PORT_IRQ_TF_ERR
= (1 << 30), /* task file error */
113 PORT_IRQ_HBUS_ERR
= (1 << 29), /* host bus fatal error */
114 PORT_IRQ_HBUS_DATA_ERR
= (1 << 28), /* host bus data error */
115 PORT_IRQ_IF_ERR
= (1 << 27), /* interface fatal error */
116 PORT_IRQ_IF_NONFATAL
= (1 << 26), /* interface non-fatal error */
117 PORT_IRQ_OVERFLOW
= (1 << 24), /* xfer exhausted available S/G */
118 PORT_IRQ_BAD_PMP
= (1 << 23), /* incorrect port multiplier */
120 PORT_IRQ_PHYRDY
= (1 << 22), /* PhyRdy changed */
121 PORT_IRQ_DEV_ILCK
= (1 << 7), /* device interlock */
122 PORT_IRQ_CONNECT
= (1 << 6), /* port connect change status */
123 PORT_IRQ_SG_DONE
= (1 << 5), /* descriptor processed */
124 PORT_IRQ_UNK_FIS
= (1 << 4), /* unknown FIS rx'd */
125 PORT_IRQ_SDB_FIS
= (1 << 3), /* Set Device Bits FIS rx'd */
126 PORT_IRQ_DMAS_FIS
= (1 << 2), /* DMA Setup FIS rx'd */
127 PORT_IRQ_PIOS_FIS
= (1 << 1), /* PIO Setup FIS rx'd */
128 PORT_IRQ_D2H_REG_FIS
= (1 << 0), /* D2H Register FIS rx'd */
130 PORT_IRQ_FATAL
= PORT_IRQ_TF_ERR
|
132 PORT_IRQ_HBUS_DATA_ERR
|
134 DEF_PORT_IRQ
= PORT_IRQ_FATAL
| PORT_IRQ_PHYRDY
|
135 PORT_IRQ_CONNECT
| PORT_IRQ_SG_DONE
|
136 PORT_IRQ_UNK_FIS
| PORT_IRQ_SDB_FIS
|
137 PORT_IRQ_DMAS_FIS
| PORT_IRQ_PIOS_FIS
|
138 PORT_IRQ_D2H_REG_FIS
,
141 PORT_CMD_ATAPI
= (1 << 24), /* Device is ATAPI */
142 PORT_CMD_LIST_ON
= (1 << 15), /* cmd list DMA engine running */
143 PORT_CMD_FIS_ON
= (1 << 14), /* FIS DMA engine running */
144 PORT_CMD_FIS_RX
= (1 << 4), /* Enable FIS receive DMA engine */
145 PORT_CMD_CLO
= (1 << 3), /* Command list override */
146 PORT_CMD_POWER_ON
= (1 << 2), /* Power up device */
147 PORT_CMD_SPIN_UP
= (1 << 1), /* Spin up device */
148 PORT_CMD_START
= (1 << 0), /* Enable port DMA engine */
150 PORT_CMD_ICC_ACTIVE
= (0x1 << 28), /* Put i/f in active state */
151 PORT_CMD_ICC_PARTIAL
= (0x2 << 28), /* Put i/f in partial state */
152 PORT_CMD_ICC_SLUMBER
= (0x6 << 28), /* Put i/f in slumber state */
154 /* hpriv->flags bits */
155 AHCI_FLAG_MSI
= (1 << 0),
158 struct ahci_cmd_hdr
{
173 struct ahci_host_priv
{
175 u32 cap
; /* cache of HOST_CAP register */
176 u32 port_map
; /* cache of HOST_PORTS_IMPL reg */
179 struct ahci_port_priv
{
180 struct ahci_cmd_hdr
*cmd_slot
;
181 dma_addr_t cmd_slot_dma
;
183 dma_addr_t cmd_tbl_dma
;
184 struct ahci_sg
*cmd_tbl_sg
;
186 dma_addr_t rx_fis_dma
;
189 static u32
ahci_scr_read (struct ata_port
*ap
, unsigned int sc_reg
);
190 static void ahci_scr_write (struct ata_port
*ap
, unsigned int sc_reg
, u32 val
);
191 static int ahci_init_one (struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
192 static unsigned int ahci_qc_issue(struct ata_queued_cmd
*qc
);
193 static irqreturn_t
ahci_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
);
194 static int ahci_probe_reset(struct ata_port
*ap
, unsigned int *classes
);
195 static void ahci_irq_clear(struct ata_port
*ap
);
196 static void ahci_eng_timeout(struct ata_port
*ap
);
197 static int ahci_port_start(struct ata_port
*ap
);
198 static void ahci_port_stop(struct ata_port
*ap
);
199 static void ahci_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
);
200 static void ahci_qc_prep(struct ata_queued_cmd
*qc
);
201 static u8
ahci_check_status(struct ata_port
*ap
);
202 static inline int ahci_host_intr(struct ata_port
*ap
, struct ata_queued_cmd
*qc
);
203 static void ahci_remove_one (struct pci_dev
*pdev
);
205 static struct scsi_host_template ahci_sht
= {
206 .module
= THIS_MODULE
,
208 .ioctl
= ata_scsi_ioctl
,
209 .queuecommand
= ata_scsi_queuecmd
,
210 .can_queue
= ATA_DEF_QUEUE
,
211 .this_id
= ATA_SHT_THIS_ID
,
212 .sg_tablesize
= AHCI_MAX_SG
,
213 .cmd_per_lun
= ATA_SHT_CMD_PER_LUN
,
214 .emulated
= ATA_SHT_EMULATED
,
215 .use_clustering
= AHCI_USE_CLUSTERING
,
216 .proc_name
= DRV_NAME
,
217 .dma_boundary
= AHCI_DMA_BOUNDARY
,
218 .slave_configure
= ata_scsi_slave_config
,
219 .bios_param
= ata_std_bios_param
,
222 static const struct ata_port_operations ahci_ops
= {
223 .port_disable
= ata_port_disable
,
225 .check_status
= ahci_check_status
,
226 .check_altstatus
= ahci_check_status
,
227 .dev_select
= ata_noop_dev_select
,
229 .tf_read
= ahci_tf_read
,
231 .probe_reset
= ahci_probe_reset
,
233 .qc_prep
= ahci_qc_prep
,
234 .qc_issue
= ahci_qc_issue
,
236 .eng_timeout
= ahci_eng_timeout
,
238 .irq_handler
= ahci_interrupt
,
239 .irq_clear
= ahci_irq_clear
,
241 .scr_read
= ahci_scr_read
,
242 .scr_write
= ahci_scr_write
,
244 .port_start
= ahci_port_start
,
245 .port_stop
= ahci_port_stop
,
248 static const struct ata_port_info ahci_port_info
[] = {
252 .host_flags
= ATA_FLAG_SATA
| ATA_FLAG_NO_LEGACY
|
253 ATA_FLAG_MMIO
| ATA_FLAG_PIO_DMA
,
254 .pio_mask
= 0x1f, /* pio0-4 */
255 .udma_mask
= 0x7f, /* udma0-6 ; FIXME */
256 .port_ops
= &ahci_ops
,
260 static const struct pci_device_id ahci_pci_tbl
[] = {
261 { PCI_VENDOR_ID_INTEL
, 0x2652, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
262 board_ahci
}, /* ICH6 */
263 { PCI_VENDOR_ID_INTEL
, 0x2653, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
264 board_ahci
}, /* ICH6M */
265 { PCI_VENDOR_ID_INTEL
, 0x27c1, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
266 board_ahci
}, /* ICH7 */
267 { PCI_VENDOR_ID_INTEL
, 0x27c5, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
268 board_ahci
}, /* ICH7M */
269 { PCI_VENDOR_ID_INTEL
, 0x27c3, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
270 board_ahci
}, /* ICH7R */
271 { PCI_VENDOR_ID_AL
, 0x5288, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
272 board_ahci
}, /* ULi M5288 */
273 { PCI_VENDOR_ID_INTEL
, 0x2681, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
274 board_ahci
}, /* ESB2 */
275 { PCI_VENDOR_ID_INTEL
, 0x2682, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
276 board_ahci
}, /* ESB2 */
277 { PCI_VENDOR_ID_INTEL
, 0x2683, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
278 board_ahci
}, /* ESB2 */
279 { PCI_VENDOR_ID_INTEL
, 0x27c6, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
280 board_ahci
}, /* ICH7-M DH */
281 { PCI_VENDOR_ID_INTEL
, 0x2821, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
282 board_ahci
}, /* ICH8 */
283 { PCI_VENDOR_ID_INTEL
, 0x2822, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
284 board_ahci
}, /* ICH8 */
285 { PCI_VENDOR_ID_INTEL
, 0x2824, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
286 board_ahci
}, /* ICH8 */
287 { PCI_VENDOR_ID_INTEL
, 0x2829, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
288 board_ahci
}, /* ICH8M */
289 { PCI_VENDOR_ID_INTEL
, 0x282a, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
290 board_ahci
}, /* ICH8M */
291 { 0x197b, 0x2360, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
292 board_ahci
}, /* JMicron JMB360 */
293 { 0x197b, 0x2363, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
294 board_ahci
}, /* JMicron JMB363 */
295 { PCI_VENDOR_ID_ATI
, 0x4380, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
296 board_ahci
}, /* ATI SB600 non-raid */
297 { PCI_VENDOR_ID_ATI
, 0x4381, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0,
298 board_ahci
}, /* ATI SB600 raid */
299 { } /* terminate list */
303 static struct pci_driver ahci_pci_driver
= {
305 .id_table
= ahci_pci_tbl
,
306 .probe
= ahci_init_one
,
307 .remove
= ahci_remove_one
,
311 static inline unsigned long ahci_port_base_ul (unsigned long base
, unsigned int port
)
313 return base
+ 0x100 + (port
* 0x80);
316 static inline void __iomem
*ahci_port_base (void __iomem
*base
, unsigned int port
)
318 return (void __iomem
*) ahci_port_base_ul((unsigned long)base
, port
);
321 static int ahci_port_start(struct ata_port
*ap
)
323 struct device
*dev
= ap
->host_set
->dev
;
324 struct ahci_host_priv
*hpriv
= ap
->host_set
->private_data
;
325 struct ahci_port_priv
*pp
;
326 void __iomem
*mmio
= ap
->host_set
->mmio_base
;
327 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
332 pp
= kmalloc(sizeof(*pp
), GFP_KERNEL
);
335 memset(pp
, 0, sizeof(*pp
));
337 rc
= ata_pad_alloc(ap
, dev
);
343 mem
= dma_alloc_coherent(dev
, AHCI_PORT_PRIV_DMA_SZ
, &mem_dma
, GFP_KERNEL
);
345 ata_pad_free(ap
, dev
);
349 memset(mem
, 0, AHCI_PORT_PRIV_DMA_SZ
);
352 * First item in chunk of DMA memory: 32-slot command table,
353 * 32 bytes each in size
356 pp
->cmd_slot_dma
= mem_dma
;
358 mem
+= AHCI_CMD_SLOT_SZ
;
359 mem_dma
+= AHCI_CMD_SLOT_SZ
;
362 * Second item: Received-FIS area
365 pp
->rx_fis_dma
= mem_dma
;
367 mem
+= AHCI_RX_FIS_SZ
;
368 mem_dma
+= AHCI_RX_FIS_SZ
;
371 * Third item: data area for storing a single command
372 * and its scatter-gather table
375 pp
->cmd_tbl_dma
= mem_dma
;
377 pp
->cmd_tbl_sg
= mem
+ AHCI_CMD_TBL_HDR
;
379 ap
->private_data
= pp
;
381 if (hpriv
->cap
& HOST_CAP_64
)
382 writel((pp
->cmd_slot_dma
>> 16) >> 16, port_mmio
+ PORT_LST_ADDR_HI
);
383 writel(pp
->cmd_slot_dma
& 0xffffffff, port_mmio
+ PORT_LST_ADDR
);
384 readl(port_mmio
+ PORT_LST_ADDR
); /* flush */
386 if (hpriv
->cap
& HOST_CAP_64
)
387 writel((pp
->rx_fis_dma
>> 16) >> 16, port_mmio
+ PORT_FIS_ADDR_HI
);
388 writel(pp
->rx_fis_dma
& 0xffffffff, port_mmio
+ PORT_FIS_ADDR
);
389 readl(port_mmio
+ PORT_FIS_ADDR
); /* flush */
391 writel(PORT_CMD_ICC_ACTIVE
| PORT_CMD_FIS_RX
|
392 PORT_CMD_POWER_ON
| PORT_CMD_SPIN_UP
|
393 PORT_CMD_START
, port_mmio
+ PORT_CMD
);
394 readl(port_mmio
+ PORT_CMD
); /* flush */
400 static void ahci_port_stop(struct ata_port
*ap
)
402 struct device
*dev
= ap
->host_set
->dev
;
403 struct ahci_port_priv
*pp
= ap
->private_data
;
404 void __iomem
*mmio
= ap
->host_set
->mmio_base
;
405 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
408 tmp
= readl(port_mmio
+ PORT_CMD
);
409 tmp
&= ~(PORT_CMD_START
| PORT_CMD_FIS_RX
);
410 writel(tmp
, port_mmio
+ PORT_CMD
);
411 readl(port_mmio
+ PORT_CMD
); /* flush */
413 /* spec says 500 msecs for each PORT_CMD_{START,FIS_RX} bit, so
414 * this is slightly incorrect.
418 ap
->private_data
= NULL
;
419 dma_free_coherent(dev
, AHCI_PORT_PRIV_DMA_SZ
,
420 pp
->cmd_slot
, pp
->cmd_slot_dma
);
421 ata_pad_free(ap
, dev
);
425 static u32
ahci_scr_read (struct ata_port
*ap
, unsigned int sc_reg_in
)
430 case SCR_STATUS
: sc_reg
= 0; break;
431 case SCR_CONTROL
: sc_reg
= 1; break;
432 case SCR_ERROR
: sc_reg
= 2; break;
433 case SCR_ACTIVE
: sc_reg
= 3; break;
438 return readl((void __iomem
*) ap
->ioaddr
.scr_addr
+ (sc_reg
* 4));
442 static void ahci_scr_write (struct ata_port
*ap
, unsigned int sc_reg_in
,
448 case SCR_STATUS
: sc_reg
= 0; break;
449 case SCR_CONTROL
: sc_reg
= 1; break;
450 case SCR_ERROR
: sc_reg
= 2; break;
451 case SCR_ACTIVE
: sc_reg
= 3; break;
456 writel(val
, (void __iomem
*) ap
->ioaddr
.scr_addr
+ (sc_reg
* 4));
459 static int ahci_stop_engine(struct ata_port
*ap
)
461 void __iomem
*mmio
= ap
->host_set
->mmio_base
;
462 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
466 tmp
= readl(port_mmio
+ PORT_CMD
);
467 tmp
&= ~PORT_CMD_START
;
468 writel(tmp
, port_mmio
+ PORT_CMD
);
470 /* wait for engine to stop. TODO: this could be
471 * as long as 500 msec
475 tmp
= readl(port_mmio
+ PORT_CMD
);
476 if ((tmp
& PORT_CMD_LIST_ON
) == 0)
484 static void ahci_start_engine(struct ata_port
*ap
)
486 void __iomem
*mmio
= ap
->host_set
->mmio_base
;
487 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
490 tmp
= readl(port_mmio
+ PORT_CMD
);
491 tmp
|= PORT_CMD_START
;
492 writel(tmp
, port_mmio
+ PORT_CMD
);
493 readl(port_mmio
+ PORT_CMD
); /* flush */
496 static unsigned int ahci_dev_classify(struct ata_port
*ap
)
498 void __iomem
*port_mmio
= (void __iomem
*) ap
->ioaddr
.cmd_addr
;
499 struct ata_taskfile tf
;
502 tmp
= readl(port_mmio
+ PORT_SIG
);
503 tf
.lbah
= (tmp
>> 24) & 0xff;
504 tf
.lbam
= (tmp
>> 16) & 0xff;
505 tf
.lbal
= (tmp
>> 8) & 0xff;
506 tf
.nsect
= (tmp
) & 0xff;
508 return ata_dev_classify(&tf
);
511 static void ahci_fill_cmd_slot(struct ahci_port_priv
*pp
, u32 opts
)
513 pp
->cmd_slot
[0].opts
= cpu_to_le32(opts
);
514 pp
->cmd_slot
[0].status
= 0;
515 pp
->cmd_slot
[0].tbl_addr
= cpu_to_le32(pp
->cmd_tbl_dma
& 0xffffffff);
516 pp
->cmd_slot
[0].tbl_addr_hi
= cpu_to_le32((pp
->cmd_tbl_dma
>> 16) >> 16);
519 static int ahci_softreset(struct ata_port
*ap
, unsigned int *class)
521 struct ahci_host_priv
*hpriv
= ap
->host_set
->private_data
;
522 struct ahci_port_priv
*pp
= ap
->private_data
;
523 void __iomem
*mmio
= ap
->host_set
->mmio_base
;
524 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
525 const u32 cmd_fis_len
= 5; /* five dwords */
526 const char *reason
= NULL
;
527 struct ata_taskfile tf
;
534 if (!sata_dev_present(ap
)) {
535 DPRINTK("PHY reports no device\n");
536 *class = ATA_DEV_NONE
;
540 /* prepare for SRST (AHCI-1.1 10.4.1) */
541 rc
= ahci_stop_engine(ap
);
543 reason
= "failed to stop engine";
547 /* check BUSY/DRQ, perform Command List Override if necessary */
548 ahci_tf_read(ap
, &tf
);
549 if (tf
.command
& (ATA_BUSY
| ATA_DRQ
)) {
550 if (!(hpriv
->cap
& HOST_CAP_CLO
)) {
552 reason
= "port busy but no CLO";
556 tmp
= readl(port_mmio
+ PORT_CMD
);
558 writel(tmp
, port_mmio
+ PORT_CMD
);
560 tmp
= ata_wait_register(port_mmio
+ PORT_CMD
,
561 PORT_CMD_CLO
, PORT_CMD_CLO
, 1, 500);
562 if (tmp
& PORT_CMD_CLO
) {
564 reason
= "CLO failed";
570 ahci_start_engine(ap
);
572 ata_tf_init(ap
, &tf
, 0);
575 /* issue the first D2H Register FIS */
576 ahci_fill_cmd_slot(pp
, cmd_fis_len
| AHCI_CMD_RESET
| AHCI_CMD_CLR_BUSY
);
579 ata_tf_to_fis(&tf
, fis
, 0);
580 fis
[1] &= ~(1 << 7); /* turn off Command FIS bit */
582 writel(1, port_mmio
+ PORT_CMD_ISSUE
);
584 tmp
= ata_wait_register(port_mmio
+ PORT_CMD_ISSUE
, 0x1, 0x1, 1, 500);
587 reason
= "1st FIS failed";
591 /* spec says at least 5us, but be generous and sleep for 1ms */
594 /* issue the second D2H Register FIS */
595 ahci_fill_cmd_slot(pp
, cmd_fis_len
);
598 ata_tf_to_fis(&tf
, fis
, 0);
599 fis
[1] &= ~(1 << 7); /* turn off Command FIS bit */
601 writel(1, port_mmio
+ PORT_CMD_ISSUE
);
602 readl(port_mmio
+ PORT_CMD_ISSUE
); /* flush */
604 /* spec mandates ">= 2ms" before checking status.
605 * We wait 150ms, because that was the magic delay used for
606 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
607 * between when the ATA command register is written, and then
608 * status is checked. Because waiting for "a while" before
609 * checking status is fine, post SRST, we perform this magic
610 * delay here as well.
614 *class = ATA_DEV_NONE
;
615 if (sata_dev_present(ap
)) {
616 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
618 reason
= "device not ready";
621 *class = ahci_dev_classify(ap
);
624 DPRINTK("EXIT, class=%u\n", *class);
628 ahci_start_engine(ap
);
630 printk(KERN_ERR
"ata%u: softreset failed (%s)\n",
635 static int ahci_hardreset(struct ata_port
*ap
, unsigned int *class)
641 ahci_stop_engine(ap
);
642 rc
= sata_std_hardreset(ap
, class);
643 ahci_start_engine(ap
);
646 *class = ahci_dev_classify(ap
);
647 if (*class == ATA_DEV_UNKNOWN
)
648 *class = ATA_DEV_NONE
;
650 DPRINTK("EXIT, rc=%d, class=%u\n", rc
, *class);
654 static void ahci_postreset(struct ata_port
*ap
, unsigned int *class)
656 void __iomem
*port_mmio
= (void __iomem
*) ap
->ioaddr
.cmd_addr
;
659 ata_std_postreset(ap
, class);
661 /* Make sure port's ATAPI bit is set appropriately */
662 new_tmp
= tmp
= readl(port_mmio
+ PORT_CMD
);
663 if (*class == ATA_DEV_ATAPI
)
664 new_tmp
|= PORT_CMD_ATAPI
;
666 new_tmp
&= ~PORT_CMD_ATAPI
;
667 if (new_tmp
!= tmp
) {
668 writel(new_tmp
, port_mmio
+ PORT_CMD
);
669 readl(port_mmio
+ PORT_CMD
); /* flush */
673 static int ahci_probe_reset(struct ata_port
*ap
, unsigned int *classes
)
675 return ata_drive_probe_reset(ap
, ata_std_probeinit
,
676 ahci_softreset
, ahci_hardreset
,
677 ahci_postreset
, classes
);
680 static u8
ahci_check_status(struct ata_port
*ap
)
682 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.cmd_addr
;
684 return readl(mmio
+ PORT_TFDATA
) & 0xFF;
687 static void ahci_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
)
689 struct ahci_port_priv
*pp
= ap
->private_data
;
690 u8
*d2h_fis
= pp
->rx_fis
+ RX_FIS_D2H_REG
;
692 ata_tf_from_fis(d2h_fis
, tf
);
695 static unsigned int ahci_fill_sg(struct ata_queued_cmd
*qc
)
697 struct ahci_port_priv
*pp
= qc
->ap
->private_data
;
698 struct scatterlist
*sg
;
699 struct ahci_sg
*ahci_sg
;
700 unsigned int n_sg
= 0;
705 * Next, the S/G list.
707 ahci_sg
= pp
->cmd_tbl_sg
;
708 ata_for_each_sg(sg
, qc
) {
709 dma_addr_t addr
= sg_dma_address(sg
);
710 u32 sg_len
= sg_dma_len(sg
);
712 ahci_sg
->addr
= cpu_to_le32(addr
& 0xffffffff);
713 ahci_sg
->addr_hi
= cpu_to_le32((addr
>> 16) >> 16);
714 ahci_sg
->flags_size
= cpu_to_le32(sg_len
- 1);
723 static void ahci_qc_prep(struct ata_queued_cmd
*qc
)
725 struct ata_port
*ap
= qc
->ap
;
726 struct ahci_port_priv
*pp
= ap
->private_data
;
727 int is_atapi
= is_atapi_taskfile(&qc
->tf
);
729 const u32 cmd_fis_len
= 5; /* five dwords */
733 * Fill in command table information. First, the header,
734 * a SATA Register - Host to Device command FIS.
736 ata_tf_to_fis(&qc
->tf
, pp
->cmd_tbl
, 0);
738 memset(pp
->cmd_tbl
+ AHCI_CMD_TBL_CDB
, 0, 32);
739 memcpy(pp
->cmd_tbl
+ AHCI_CMD_TBL_CDB
, qc
->cdb
,
744 if (qc
->flags
& ATA_QCFLAG_DMAMAP
)
745 n_elem
= ahci_fill_sg(qc
);
748 * Fill in command slot information.
750 opts
= cmd_fis_len
| n_elem
<< 16;
751 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
752 opts
|= AHCI_CMD_WRITE
;
754 opts
|= AHCI_CMD_ATAPI
| AHCI_CMD_PREFETCH
;
756 ahci_fill_cmd_slot(pp
, opts
);
759 static void ahci_restart_port(struct ata_port
*ap
, u32 irq_stat
)
761 void __iomem
*mmio
= ap
->host_set
->mmio_base
;
762 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
765 if ((ap
->device
[0].class != ATA_DEV_ATAPI
) ||
766 ((irq_stat
& PORT_IRQ_TF_ERR
) == 0))
767 printk(KERN_WARNING
"ata%u: port reset, "
768 "p_is %x is %x pis %x cmd %x tf %x ss %x se %x\n",
771 readl(mmio
+ HOST_IRQ_STAT
),
772 readl(port_mmio
+ PORT_IRQ_STAT
),
773 readl(port_mmio
+ PORT_CMD
),
774 readl(port_mmio
+ PORT_TFDATA
),
775 readl(port_mmio
+ PORT_SCR_STAT
),
776 readl(port_mmio
+ PORT_SCR_ERR
));
779 ahci_stop_engine(ap
);
781 /* clear SATA phy error, if any */
782 tmp
= readl(port_mmio
+ PORT_SCR_ERR
);
783 writel(tmp
, port_mmio
+ PORT_SCR_ERR
);
785 /* if DRQ/BSY is set, device needs to be reset.
786 * if so, issue COMRESET
788 tmp
= readl(port_mmio
+ PORT_TFDATA
);
789 if (tmp
& (ATA_BUSY
| ATA_DRQ
)) {
790 writel(0x301, port_mmio
+ PORT_SCR_CTL
);
791 readl(port_mmio
+ PORT_SCR_CTL
); /* flush */
793 writel(0x300, port_mmio
+ PORT_SCR_CTL
);
794 readl(port_mmio
+ PORT_SCR_CTL
); /* flush */
798 ahci_start_engine(ap
);
801 static void ahci_eng_timeout(struct ata_port
*ap
)
803 struct ata_host_set
*host_set
= ap
->host_set
;
804 void __iomem
*mmio
= host_set
->mmio_base
;
805 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
806 struct ata_queued_cmd
*qc
;
809 printk(KERN_WARNING
"ata%u: handling error/timeout\n", ap
->id
);
811 spin_lock_irqsave(&host_set
->lock
, flags
);
813 ahci_restart_port(ap
, readl(port_mmio
+ PORT_IRQ_STAT
));
814 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
815 qc
->err_mask
|= AC_ERR_TIMEOUT
;
817 spin_unlock_irqrestore(&host_set
->lock
, flags
);
819 ata_eh_qc_complete(qc
);
822 static inline int ahci_host_intr(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
824 void __iomem
*mmio
= ap
->host_set
->mmio_base
;
825 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
826 u32 status
, serr
, ci
;
828 serr
= readl(port_mmio
+ PORT_SCR_ERR
);
829 writel(serr
, port_mmio
+ PORT_SCR_ERR
);
831 status
= readl(port_mmio
+ PORT_IRQ_STAT
);
832 writel(status
, port_mmio
+ PORT_IRQ_STAT
);
834 ci
= readl(port_mmio
+ PORT_CMD_ISSUE
);
835 if (likely((ci
& 0x1) == 0)) {
837 WARN_ON(qc
->err_mask
);
843 if (status
& PORT_IRQ_FATAL
) {
844 unsigned int err_mask
;
845 if (status
& PORT_IRQ_TF_ERR
)
846 err_mask
= AC_ERR_DEV
;
847 else if (status
& PORT_IRQ_IF_ERR
)
848 err_mask
= AC_ERR_ATA_BUS
;
850 err_mask
= AC_ERR_HOST_BUS
;
852 /* command processing has stopped due to error; restart */
853 ahci_restart_port(ap
, status
);
856 qc
->err_mask
|= err_mask
;
864 static void ahci_irq_clear(struct ata_port
*ap
)
869 static irqreturn_t
ahci_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
)
871 struct ata_host_set
*host_set
= dev_instance
;
872 struct ahci_host_priv
*hpriv
;
873 unsigned int i
, handled
= 0;
875 u32 irq_stat
, irq_ack
= 0;
879 hpriv
= host_set
->private_data
;
880 mmio
= host_set
->mmio_base
;
882 /* sigh. 0xffffffff is a valid return from h/w */
883 irq_stat
= readl(mmio
+ HOST_IRQ_STAT
);
884 irq_stat
&= hpriv
->port_map
;
888 spin_lock(&host_set
->lock
);
890 for (i
= 0; i
< host_set
->n_ports
; i
++) {
893 if (!(irq_stat
& (1 << i
)))
896 ap
= host_set
->ports
[i
];
898 struct ata_queued_cmd
*qc
;
899 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
900 if (!ahci_host_intr(ap
, qc
))
902 dev_printk(KERN_WARNING
, host_set
->dev
,
903 "unhandled interrupt on port %u\n",
906 VPRINTK("port %u\n", i
);
908 VPRINTK("port %u (no irq)\n", i
);
910 dev_printk(KERN_WARNING
, host_set
->dev
,
911 "interrupt on disabled port %u\n", i
);
918 writel(irq_ack
, mmio
+ HOST_IRQ_STAT
);
922 spin_unlock(&host_set
->lock
);
926 return IRQ_RETVAL(handled
);
929 static unsigned int ahci_qc_issue(struct ata_queued_cmd
*qc
)
931 struct ata_port
*ap
= qc
->ap
;
932 void __iomem
*port_mmio
= (void __iomem
*) ap
->ioaddr
.cmd_addr
;
934 writel(1, port_mmio
+ PORT_CMD_ISSUE
);
935 readl(port_mmio
+ PORT_CMD_ISSUE
); /* flush */
940 static void ahci_setup_port(struct ata_ioports
*port
, unsigned long base
,
941 unsigned int port_idx
)
943 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base
, port_idx
);
944 base
= ahci_port_base_ul(base
, port_idx
);
945 VPRINTK("base now==0x%lx\n", base
);
947 port
->cmd_addr
= base
;
948 port
->scr_addr
= base
+ PORT_SCR
;
953 static int ahci_host_init(struct ata_probe_ent
*probe_ent
)
955 struct ahci_host_priv
*hpriv
= probe_ent
->private_data
;
956 struct pci_dev
*pdev
= to_pci_dev(probe_ent
->dev
);
957 void __iomem
*mmio
= probe_ent
->mmio_base
;
959 unsigned int i
, j
, using_dac
;
961 void __iomem
*port_mmio
;
963 cap_save
= readl(mmio
+ HOST_CAP
);
964 cap_save
&= ( (1<<28) | (1<<17) );
965 cap_save
|= (1 << 27);
967 /* global controller reset */
968 tmp
= readl(mmio
+ HOST_CTL
);
969 if ((tmp
& HOST_RESET
) == 0) {
970 writel(tmp
| HOST_RESET
, mmio
+ HOST_CTL
);
971 readl(mmio
+ HOST_CTL
); /* flush */
974 /* reset must complete within 1 second, or
975 * the hardware should be considered fried.
979 tmp
= readl(mmio
+ HOST_CTL
);
980 if (tmp
& HOST_RESET
) {
981 dev_printk(KERN_ERR
, &pdev
->dev
,
982 "controller reset failed (0x%x)\n", tmp
);
986 writel(HOST_AHCI_EN
, mmio
+ HOST_CTL
);
987 (void) readl(mmio
+ HOST_CTL
); /* flush */
988 writel(cap_save
, mmio
+ HOST_CAP
);
989 writel(0xf, mmio
+ HOST_PORTS_IMPL
);
990 (void) readl(mmio
+ HOST_PORTS_IMPL
); /* flush */
992 if (pdev
->vendor
== PCI_VENDOR_ID_INTEL
) {
995 pci_read_config_word(pdev
, 0x92, &tmp16
);
997 pci_write_config_word(pdev
, 0x92, tmp16
);
1000 hpriv
->cap
= readl(mmio
+ HOST_CAP
);
1001 hpriv
->port_map
= readl(mmio
+ HOST_PORTS_IMPL
);
1002 probe_ent
->n_ports
= (hpriv
->cap
& 0x1f) + 1;
1004 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
1005 hpriv
->cap
, hpriv
->port_map
, probe_ent
->n_ports
);
1007 using_dac
= hpriv
->cap
& HOST_CAP_64
;
1009 !pci_set_dma_mask(pdev
, DMA_64BIT_MASK
)) {
1010 rc
= pci_set_consistent_dma_mask(pdev
, DMA_64BIT_MASK
);
1012 rc
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
);
1014 dev_printk(KERN_ERR
, &pdev
->dev
,
1015 "64-bit DMA enable failed\n");
1020 rc
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
);
1022 dev_printk(KERN_ERR
, &pdev
->dev
,
1023 "32-bit DMA enable failed\n");
1026 rc
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
);
1028 dev_printk(KERN_ERR
, &pdev
->dev
,
1029 "32-bit consistent DMA enable failed\n");
1034 for (i
= 0; i
< probe_ent
->n_ports
; i
++) {
1035 #if 0 /* BIOSen initialize this incorrectly */
1036 if (!(hpriv
->port_map
& (1 << i
)))
1040 port_mmio
= ahci_port_base(mmio
, i
);
1041 VPRINTK("mmio %p port_mmio %p\n", mmio
, port_mmio
);
1043 ahci_setup_port(&probe_ent
->port
[i
],
1044 (unsigned long) mmio
, i
);
1046 /* make sure port is not active */
1047 tmp
= readl(port_mmio
+ PORT_CMD
);
1048 VPRINTK("PORT_CMD 0x%x\n", tmp
);
1049 if (tmp
& (PORT_CMD_LIST_ON
| PORT_CMD_FIS_ON
|
1050 PORT_CMD_FIS_RX
| PORT_CMD_START
)) {
1051 tmp
&= ~(PORT_CMD_LIST_ON
| PORT_CMD_FIS_ON
|
1052 PORT_CMD_FIS_RX
| PORT_CMD_START
);
1053 writel(tmp
, port_mmio
+ PORT_CMD
);
1054 readl(port_mmio
+ PORT_CMD
); /* flush */
1056 /* spec says 500 msecs for each bit, so
1057 * this is slightly incorrect.
1062 writel(PORT_CMD_SPIN_UP
, port_mmio
+ PORT_CMD
);
1067 tmp
= readl(port_mmio
+ PORT_SCR_STAT
);
1068 if ((tmp
& 0xf) == 0x3)
1073 tmp
= readl(port_mmio
+ PORT_SCR_ERR
);
1074 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp
);
1075 writel(tmp
, port_mmio
+ PORT_SCR_ERR
);
1077 /* ack any pending irq events for this port */
1078 tmp
= readl(port_mmio
+ PORT_IRQ_STAT
);
1079 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp
);
1081 writel(tmp
, port_mmio
+ PORT_IRQ_STAT
);
1083 writel(1 << i
, mmio
+ HOST_IRQ_STAT
);
1085 /* set irq mask (enables interrupts) */
1086 writel(DEF_PORT_IRQ
, port_mmio
+ PORT_IRQ_MASK
);
1089 tmp
= readl(mmio
+ HOST_CTL
);
1090 VPRINTK("HOST_CTL 0x%x\n", tmp
);
1091 writel(tmp
| HOST_IRQ_EN
, mmio
+ HOST_CTL
);
1092 tmp
= readl(mmio
+ HOST_CTL
);
1093 VPRINTK("HOST_CTL 0x%x\n", tmp
);
1095 pci_set_master(pdev
);
1100 static void ahci_print_info(struct ata_probe_ent
*probe_ent
)
1102 struct ahci_host_priv
*hpriv
= probe_ent
->private_data
;
1103 struct pci_dev
*pdev
= to_pci_dev(probe_ent
->dev
);
1104 void __iomem
*mmio
= probe_ent
->mmio_base
;
1105 u32 vers
, cap
, impl
, speed
;
1106 const char *speed_s
;
1110 vers
= readl(mmio
+ HOST_VERSION
);
1112 impl
= hpriv
->port_map
;
1114 speed
= (cap
>> 20) & 0xf;
1117 else if (speed
== 2)
1122 pci_read_config_word(pdev
, 0x0a, &cc
);
1125 else if (cc
== 0x0106)
1127 else if (cc
== 0x0104)
1132 dev_printk(KERN_INFO
, &pdev
->dev
,
1133 "AHCI %02x%02x.%02x%02x "
1134 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1137 (vers
>> 24) & 0xff,
1138 (vers
>> 16) & 0xff,
1142 ((cap
>> 8) & 0x1f) + 1,
1148 dev_printk(KERN_INFO
, &pdev
->dev
,
1154 cap
& (1 << 31) ? "64bit " : "",
1155 cap
& (1 << 30) ? "ncq " : "",
1156 cap
& (1 << 28) ? "ilck " : "",
1157 cap
& (1 << 27) ? "stag " : "",
1158 cap
& (1 << 26) ? "pm " : "",
1159 cap
& (1 << 25) ? "led " : "",
1161 cap
& (1 << 24) ? "clo " : "",
1162 cap
& (1 << 19) ? "nz " : "",
1163 cap
& (1 << 18) ? "only " : "",
1164 cap
& (1 << 17) ? "pmp " : "",
1165 cap
& (1 << 15) ? "pio " : "",
1166 cap
& (1 << 14) ? "slum " : "",
1167 cap
& (1 << 13) ? "part " : ""
1171 static int ahci_init_one (struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
1173 static int printed_version
;
1174 struct ata_probe_ent
*probe_ent
= NULL
;
1175 struct ahci_host_priv
*hpriv
;
1177 void __iomem
*mmio_base
;
1178 unsigned int board_idx
= (unsigned int) ent
->driver_data
;
1179 int have_msi
, pci_dev_busy
= 0;
1184 if (!printed_version
++)
1185 dev_printk(KERN_DEBUG
, &pdev
->dev
, "version " DRV_VERSION
"\n");
1187 rc
= pci_enable_device(pdev
);
1191 rc
= pci_request_regions(pdev
, DRV_NAME
);
1197 if (pci_enable_msi(pdev
) == 0)
1204 probe_ent
= kmalloc(sizeof(*probe_ent
), GFP_KERNEL
);
1205 if (probe_ent
== NULL
) {
1210 memset(probe_ent
, 0, sizeof(*probe_ent
));
1211 probe_ent
->dev
= pci_dev_to_dev(pdev
);
1212 INIT_LIST_HEAD(&probe_ent
->node
);
1214 mmio_base
= pci_iomap(pdev
, AHCI_PCI_BAR
, 0);
1215 if (mmio_base
== NULL
) {
1217 goto err_out_free_ent
;
1219 base
= (unsigned long) mmio_base
;
1221 hpriv
= kmalloc(sizeof(*hpriv
), GFP_KERNEL
);
1224 goto err_out_iounmap
;
1226 memset(hpriv
, 0, sizeof(*hpriv
));
1228 probe_ent
->sht
= ahci_port_info
[board_idx
].sht
;
1229 probe_ent
->host_flags
= ahci_port_info
[board_idx
].host_flags
;
1230 probe_ent
->pio_mask
= ahci_port_info
[board_idx
].pio_mask
;
1231 probe_ent
->udma_mask
= ahci_port_info
[board_idx
].udma_mask
;
1232 probe_ent
->port_ops
= ahci_port_info
[board_idx
].port_ops
;
1234 probe_ent
->irq
= pdev
->irq
;
1235 probe_ent
->irq_flags
= SA_SHIRQ
;
1236 probe_ent
->mmio_base
= mmio_base
;
1237 probe_ent
->private_data
= hpriv
;
1240 hpriv
->flags
|= AHCI_FLAG_MSI
;
1242 /* JMicron-specific fixup: make sure we're in AHCI mode */
1243 if (pdev
->vendor
== 0x197b)
1244 pci_write_config_byte(pdev
, 0x41, 0xa1);
1246 /* initialize adapter */
1247 rc
= ahci_host_init(probe_ent
);
1251 ahci_print_info(probe_ent
);
1253 /* FIXME: check ata_device_add return value */
1254 ata_device_add(probe_ent
);
1262 pci_iounmap(pdev
, mmio_base
);
1267 pci_disable_msi(pdev
);
1270 pci_release_regions(pdev
);
1273 pci_disable_device(pdev
);
1277 static void ahci_remove_one (struct pci_dev
*pdev
)
1279 struct device
*dev
= pci_dev_to_dev(pdev
);
1280 struct ata_host_set
*host_set
= dev_get_drvdata(dev
);
1281 struct ahci_host_priv
*hpriv
= host_set
->private_data
;
1282 struct ata_port
*ap
;
1286 for (i
= 0; i
< host_set
->n_ports
; i
++) {
1287 ap
= host_set
->ports
[i
];
1289 scsi_remove_host(ap
->host
);
1292 have_msi
= hpriv
->flags
& AHCI_FLAG_MSI
;
1293 free_irq(host_set
->irq
, host_set
);
1295 for (i
= 0; i
< host_set
->n_ports
; i
++) {
1296 ap
= host_set
->ports
[i
];
1298 ata_scsi_release(ap
->host
);
1299 scsi_host_put(ap
->host
);
1303 pci_iounmap(pdev
, host_set
->mmio_base
);
1307 pci_disable_msi(pdev
);
1310 pci_release_regions(pdev
);
1311 pci_disable_device(pdev
);
1312 dev_set_drvdata(dev
, NULL
);
1315 static int __init
ahci_init(void)
1317 return pci_module_init(&ahci_pci_driver
);
1320 static void __exit
ahci_exit(void)
1322 pci_unregister_driver(&ahci_pci_driver
);
1326 MODULE_AUTHOR("Jeff Garzik");
1327 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1328 MODULE_LICENSE("GPL");
1329 MODULE_DEVICE_TABLE(pci
, ahci_pci_tbl
);
1330 MODULE_VERSION(DRV_VERSION
);
1332 module_init(ahci_init
);
1333 module_exit(ahci_exit
);