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 "2.0"
56 AHCI_MAX_SG = 168, /* hardware max is 64K */
57 AHCI_DMA_BOUNDARY = 0xffffffff,
58 AHCI_USE_CLUSTERING = 0,
61 AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ,
63 AHCI_CMD_TBL_CDB = 0x40,
64 AHCI_CMD_TBL_HDR_SZ = 0x80,
65 AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16),
66 AHCI_CMD_TBL_AR_SZ = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS,
67 AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ +
69 AHCI_IRQ_ON_SG = (1 << 31),
70 AHCI_CMD_ATAPI = (1 << 5),
71 AHCI_CMD_WRITE = (1 << 6),
72 AHCI_CMD_PREFETCH = (1 << 7),
73 AHCI_CMD_RESET = (1 << 8),
74 AHCI_CMD_CLR_BUSY = (1 << 10),
76 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
77 RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */
80 board_ahci_vt8251 = 1,
82 /* global controller registers */
83 HOST_CAP = 0x00, /* host capabilities */
84 HOST_CTL = 0x04, /* global host control */
85 HOST_IRQ_STAT = 0x08, /* interrupt status */
86 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
87 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
90 HOST_RESET = (1 << 0), /* reset controller; self-clear */
91 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
92 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
95 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
96 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
97 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
99 /* registers for each SATA port */
100 PORT_LST_ADDR = 0x00, /* command list DMA addr */
101 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
102 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
103 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
104 PORT_IRQ_STAT = 0x10, /* interrupt status */
105 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
106 PORT_CMD = 0x18, /* port command */
107 PORT_TFDATA = 0x20, /* taskfile data */
108 PORT_SIG = 0x24, /* device TF signature */
109 PORT_CMD_ISSUE = 0x38, /* command issue */
110 PORT_SCR = 0x28, /* SATA phy register block */
111 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
112 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
113 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
114 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
116 /* PORT_IRQ_{STAT,MASK} bits */
117 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
118 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
119 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
120 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
121 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
122 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
123 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
124 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
126 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
127 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
128 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
129 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
130 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
131 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
132 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
133 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
134 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
136 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
141 PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
143 PORT_IRQ_HBUS_DATA_ERR,
144 DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
145 PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
146 PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
149 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
150 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
151 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
152 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
153 PORT_CMD_CLO = (1 << 3), /* Command list override */
154 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
155 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
156 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
158 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
159 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
160 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
162 /* hpriv->flags bits */
163 AHCI_FLAG_MSI = (1 << 0),
166 AHCI_FLAG_RESET_NEEDS_CLO = (1 << 24),
167 AHCI_FLAG_NO_NCQ = (1 << 25),
170 struct ahci_cmd_hdr {
185 struct ahci_host_priv {
187 u32 cap; /* cache of HOST_CAP register */
188 u32 port_map; /* cache of HOST_PORTS_IMPL reg */
191 struct ahci_port_priv {
192 struct ahci_cmd_hdr *cmd_slot;
193 dma_addr_t cmd_slot_dma;
195 dma_addr_t cmd_tbl_dma;
197 dma_addr_t rx_fis_dma;
200 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
201 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
202 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
203 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
204 static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
205 static void ahci_irq_clear(struct ata_port *ap);
206 static int ahci_port_start(struct ata_port *ap);
207 static void ahci_port_stop(struct ata_port *ap);
208 static int ahci_start_engine(void __iomem *port_mmio);
209 static int ahci_stop_engine(void __iomem *port_mmio);
210 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
211 static void ahci_qc_prep(struct ata_queued_cmd *qc);
212 static u8 ahci_check_status(struct ata_port *ap);
213 static void ahci_freeze(struct ata_port *ap);
214 static void ahci_thaw(struct ata_port *ap);
215 static void ahci_error_handler(struct ata_port *ap);
216 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
217 static void ahci_remove_one (struct pci_dev *pdev);
219 static struct scsi_host_template ahci_sht = {
220 .module = THIS_MODULE,
222 .ioctl = ata_scsi_ioctl,
223 .queuecommand = ata_scsi_queuecmd,
224 .change_queue_depth = ata_scsi_change_queue_depth,
225 .can_queue = AHCI_MAX_CMDS - 1,
226 .this_id = ATA_SHT_THIS_ID,
227 .sg_tablesize = AHCI_MAX_SG,
228 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
229 .emulated = ATA_SHT_EMULATED,
230 .use_clustering = AHCI_USE_CLUSTERING,
231 .proc_name = DRV_NAME,
232 .dma_boundary = AHCI_DMA_BOUNDARY,
233 .slave_configure = ata_scsi_slave_config,
234 .slave_destroy = ata_scsi_slave_destroy,
235 .bios_param = ata_std_bios_param,
238 static const struct ata_port_operations ahci_ops = {
239 .port_disable = ata_port_disable,
241 .check_status = ahci_check_status,
242 .check_altstatus = ahci_check_status,
243 .dev_select = ata_noop_dev_select,
245 .tf_read = ahci_tf_read,
247 .qc_prep = ahci_qc_prep,
248 .qc_issue = ahci_qc_issue,
250 .irq_handler = ahci_interrupt,
251 .irq_clear = ahci_irq_clear,
253 .scr_read = ahci_scr_read,
254 .scr_write = ahci_scr_write,
256 .freeze = ahci_freeze,
259 .error_handler = ahci_error_handler,
260 .post_internal_cmd = ahci_post_internal_cmd,
262 .port_start = ahci_port_start,
263 .port_stop = ahci_port_stop,
266 static const struct ata_port_info ahci_port_info[] = {
270 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
271 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
272 ATA_FLAG_SKIP_D2H_BSY,
273 .pio_mask = 0x1f, /* pio0-4 */
274 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
275 .port_ops = &ahci_ops,
277 /* board_ahci_vt8251 */
280 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
281 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
282 ATA_FLAG_SKIP_D2H_BSY |
283 AHCI_FLAG_RESET_NEEDS_CLO | AHCI_FLAG_NO_NCQ,
284 .pio_mask = 0x1f, /* pio0-4 */
285 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
286 .port_ops = &ahci_ops,
290 static const struct pci_device_id ahci_pci_tbl[] = {
292 { PCI_VENDOR_ID_INTEL, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
293 board_ahci }, /* ICH6 */
294 { PCI_VENDOR_ID_INTEL, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
295 board_ahci }, /* ICH6M */
296 { PCI_VENDOR_ID_INTEL, 0x27c1, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
297 board_ahci }, /* ICH7 */
298 { PCI_VENDOR_ID_INTEL, 0x27c5, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
299 board_ahci }, /* ICH7M */
300 { PCI_VENDOR_ID_INTEL, 0x27c3, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
301 board_ahci }, /* ICH7R */
302 { PCI_VENDOR_ID_AL, 0x5288, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
303 board_ahci }, /* ULi M5288 */
304 { PCI_VENDOR_ID_INTEL, 0x2681, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
305 board_ahci }, /* ESB2 */
306 { PCI_VENDOR_ID_INTEL, 0x2682, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
307 board_ahci }, /* ESB2 */
308 { PCI_VENDOR_ID_INTEL, 0x2683, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
309 board_ahci }, /* ESB2 */
310 { PCI_VENDOR_ID_INTEL, 0x27c6, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
311 board_ahci }, /* ICH7-M DH */
312 { PCI_VENDOR_ID_INTEL, 0x2821, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
313 board_ahci }, /* ICH8 */
314 { PCI_VENDOR_ID_INTEL, 0x2822, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
315 board_ahci }, /* ICH8 */
316 { PCI_VENDOR_ID_INTEL, 0x2824, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
317 board_ahci }, /* ICH8 */
318 { PCI_VENDOR_ID_INTEL, 0x2829, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
319 board_ahci }, /* ICH8M */
320 { PCI_VENDOR_ID_INTEL, 0x282a, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
321 board_ahci }, /* ICH8M */
324 { 0x197b, 0x2360, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
325 board_ahci }, /* JMicron JMB360 */
326 { 0x197b, 0x2361, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
327 board_ahci }, /* JMicron JMB361 */
328 { 0x197b, 0x2363, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
329 board_ahci }, /* JMicron JMB363 */
330 { 0x197b, 0x2365, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
331 board_ahci }, /* JMicron JMB365 */
332 { 0x197b, 0x2366, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
333 board_ahci }, /* JMicron JMB366 */
336 { PCI_VENDOR_ID_ATI, 0x4380, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
337 board_ahci }, /* ATI SB600 non-raid */
338 { PCI_VENDOR_ID_ATI, 0x4381, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
339 board_ahci }, /* ATI SB600 raid */
342 { PCI_VENDOR_ID_VIA, 0x3349, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
343 board_ahci_vt8251 }, /* VIA VT8251 */
346 { PCI_VENDOR_ID_NVIDIA, 0x044c, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
347 board_ahci }, /* MCP65 */
348 { PCI_VENDOR_ID_NVIDIA, 0x044d, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
349 board_ahci }, /* MCP65 */
350 { PCI_VENDOR_ID_NVIDIA, 0x044e, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
351 board_ahci }, /* MCP65 */
352 { PCI_VENDOR_ID_NVIDIA, 0x044f, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
353 board_ahci }, /* MCP65 */
355 { } /* terminate list */
359 static struct pci_driver ahci_pci_driver = {
361 .id_table = ahci_pci_tbl,
362 .probe = ahci_init_one,
363 .remove = ahci_remove_one,
367 static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port)
369 return base + 0x100 + (port * 0x80);
372 static inline void __iomem *ahci_port_base (void __iomem *base, unsigned int port)
374 return (void __iomem *) ahci_port_base_ul((unsigned long)base, port);
377 static int ahci_port_start(struct ata_port *ap)
379 struct device *dev = ap->host_set->dev;
380 struct ahci_host_priv *hpriv = ap->host_set->private_data;
381 struct ahci_port_priv *pp;
382 void __iomem *mmio = ap->host_set->mmio_base;
383 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
388 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
391 memset(pp, 0, sizeof(*pp));
393 rc = ata_pad_alloc(ap, dev);
399 mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);
401 ata_pad_free(ap, dev);
405 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
408 * First item in chunk of DMA memory: 32-slot command table,
409 * 32 bytes each in size
412 pp->cmd_slot_dma = mem_dma;
414 mem += AHCI_CMD_SLOT_SZ;
415 mem_dma += AHCI_CMD_SLOT_SZ;
418 * Second item: Received-FIS area
421 pp->rx_fis_dma = mem_dma;
423 mem += AHCI_RX_FIS_SZ;
424 mem_dma += AHCI_RX_FIS_SZ;
427 * Third item: data area for storing a single command
428 * and its scatter-gather table
431 pp->cmd_tbl_dma = mem_dma;
433 ap->private_data = pp;
435 if (hpriv->cap & HOST_CAP_64)
436 writel((pp->cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
437 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
438 readl(port_mmio + PORT_LST_ADDR); /* flush */
440 if (hpriv->cap & HOST_CAP_64)
441 writel((pp->rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
442 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
443 readl(port_mmio + PORT_FIS_ADDR); /* flush */
445 writel(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX |
446 PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP |
447 PORT_CMD_START, port_mmio + PORT_CMD);
448 readl(port_mmio + PORT_CMD); /* flush */
454 static void ahci_port_stop(struct ata_port *ap)
456 struct device *dev = ap->host_set->dev;
457 struct ahci_port_priv *pp = ap->private_data;
458 void __iomem *mmio = ap->host_set->mmio_base;
459 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
462 tmp = readl(port_mmio + PORT_CMD);
463 tmp &= ~(PORT_CMD_START | PORT_CMD_FIS_RX);
464 writel(tmp, port_mmio + PORT_CMD);
465 readl(port_mmio + PORT_CMD); /* flush */
467 /* spec says 500 msecs for each PORT_CMD_{START,FIS_RX} bit, so
468 * this is slightly incorrect.
472 ap->private_data = NULL;
473 dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,
474 pp->cmd_slot, pp->cmd_slot_dma);
475 ata_pad_free(ap, dev);
479 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
484 case SCR_STATUS: sc_reg = 0; break;
485 case SCR_CONTROL: sc_reg = 1; break;
486 case SCR_ERROR: sc_reg = 2; break;
487 case SCR_ACTIVE: sc_reg = 3; break;
492 return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
496 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
502 case SCR_STATUS: sc_reg = 0; break;
503 case SCR_CONTROL: sc_reg = 1; break;
504 case SCR_ERROR: sc_reg = 2; break;
505 case SCR_ACTIVE: sc_reg = 3; break;
510 writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
513 static int ahci_stop_engine(void __iomem *port_mmio)
517 tmp = readl(port_mmio + PORT_CMD);
519 /* Check if the HBA is idle */
520 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
523 /* Setting HBA to idle */
524 tmp &= ~PORT_CMD_START;
525 writel(tmp, port_mmio + PORT_CMD);
527 /* wait for engine to stop. This could be
528 * as long as 500 msec
530 tmp = ata_wait_register(port_mmio + PORT_CMD,
531 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
532 if(tmp & PORT_CMD_LIST_ON)
538 static int ahci_start_engine(void __iomem *port_mmio)
545 tmp = readl(port_mmio + PORT_CMD);
548 * AHCI rev 1.1 section 10.3.1:
549 * Software shall not set PxCMD.ST to '1' until it verifies
550 * that PxCMD.CR is '0' and has set PxCMD.FRE to '1'
552 if ((tmp & PORT_CMD_FIS_RX) == 0)
556 * wait for engine to become idle.
558 tmp = ata_wait_register(port_mmio + PORT_CMD,
559 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1,500);
560 if(tmp & PORT_CMD_LIST_ON)
566 tmp |= PORT_CMD_START;
567 writel(tmp, port_mmio + PORT_CMD);
568 readl(port_mmio + PORT_CMD); /* flush */
573 static unsigned int ahci_dev_classify(struct ata_port *ap)
575 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
576 struct ata_taskfile tf;
579 tmp = readl(port_mmio + PORT_SIG);
580 tf.lbah = (tmp >> 24) & 0xff;
581 tf.lbam = (tmp >> 16) & 0xff;
582 tf.lbal = (tmp >> 8) & 0xff;
583 tf.nsect = (tmp) & 0xff;
585 return ata_dev_classify(&tf);
588 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
591 dma_addr_t cmd_tbl_dma;
593 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
595 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
596 pp->cmd_slot[tag].status = 0;
597 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
598 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
601 static int ahci_clo(struct ata_port *ap)
603 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
604 struct ahci_host_priv *hpriv = ap->host_set->private_data;
607 if (!(hpriv->cap & HOST_CAP_CLO))
610 tmp = readl(port_mmio + PORT_CMD);
612 writel(tmp, port_mmio + PORT_CMD);
614 tmp = ata_wait_register(port_mmio + PORT_CMD,
615 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
616 if (tmp & PORT_CMD_CLO)
622 static int ahci_prereset(struct ata_port *ap)
624 if ((ap->flags & AHCI_FLAG_RESET_NEEDS_CLO) &&
625 (ata_busy_wait(ap, ATA_BUSY, 1000) & ATA_BUSY)) {
626 /* ATA_BUSY hasn't cleared, so send a CLO */
630 return ata_std_prereset(ap);
633 static int ahci_softreset(struct ata_port *ap, unsigned int *class)
635 struct ahci_port_priv *pp = ap->private_data;
636 void __iomem *mmio = ap->host_set->mmio_base;
637 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
638 const u32 cmd_fis_len = 5; /* five dwords */
639 const char *reason = NULL;
640 struct ata_taskfile tf;
647 if (ata_port_offline(ap)) {
648 DPRINTK("PHY reports no device\n");
649 *class = ATA_DEV_NONE;
653 /* prepare for SRST (AHCI-1.1 10.4.1) */
654 rc = ahci_stop_engine(port_mmio);
656 reason = "failed to stop engine";
660 /* check BUSY/DRQ, perform Command List Override if necessary */
661 ahci_tf_read(ap, &tf);
662 if (tf.command & (ATA_BUSY | ATA_DRQ)) {
665 if (rc == -EOPNOTSUPP) {
666 reason = "port busy but CLO unavailable";
669 reason = "port busy but CLO failed";
675 ahci_start_engine(port_mmio);
677 ata_tf_init(ap->device, &tf);
680 /* issue the first D2H Register FIS */
681 ahci_fill_cmd_slot(pp, 0,
682 cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
685 ata_tf_to_fis(&tf, fis, 0);
686 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
688 writel(1, port_mmio + PORT_CMD_ISSUE);
690 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, 500);
693 reason = "1st FIS failed";
697 /* spec says at least 5us, but be generous and sleep for 1ms */
700 /* issue the second D2H Register FIS */
701 ahci_fill_cmd_slot(pp, 0, cmd_fis_len);
704 ata_tf_to_fis(&tf, fis, 0);
705 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
707 writel(1, port_mmio + PORT_CMD_ISSUE);
708 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
710 /* spec mandates ">= 2ms" before checking status.
711 * We wait 150ms, because that was the magic delay used for
712 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
713 * between when the ATA command register is written, and then
714 * status is checked. Because waiting for "a while" before
715 * checking status is fine, post SRST, we perform this magic
716 * delay here as well.
720 *class = ATA_DEV_NONE;
721 if (ata_port_online(ap)) {
722 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
724 reason = "device not ready";
727 *class = ahci_dev_classify(ap);
730 DPRINTK("EXIT, class=%u\n", *class);
734 ahci_start_engine(port_mmio);
736 ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
740 static int ahci_hardreset(struct ata_port *ap, unsigned int *class)
742 struct ahci_port_priv *pp = ap->private_data;
743 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
744 struct ata_taskfile tf;
745 void __iomem *mmio = ap->host_set->mmio_base;
746 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
751 ahci_stop_engine(port_mmio);
753 /* clear D2H reception area to properly wait for D2H FIS */
754 ata_tf_init(ap->device, &tf);
756 ata_tf_to_fis(&tf, d2h_fis, 0);
758 rc = sata_std_hardreset(ap, class);
760 ahci_start_engine(port_mmio);
762 if (rc == 0 && ata_port_online(ap))
763 *class = ahci_dev_classify(ap);
764 if (*class == ATA_DEV_UNKNOWN)
765 *class = ATA_DEV_NONE;
767 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
771 static void ahci_postreset(struct ata_port *ap, unsigned int *class)
773 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
776 ata_std_postreset(ap, class);
778 /* Make sure port's ATAPI bit is set appropriately */
779 new_tmp = tmp = readl(port_mmio + PORT_CMD);
780 if (*class == ATA_DEV_ATAPI)
781 new_tmp |= PORT_CMD_ATAPI;
783 new_tmp &= ~PORT_CMD_ATAPI;
784 if (new_tmp != tmp) {
785 writel(new_tmp, port_mmio + PORT_CMD);
786 readl(port_mmio + PORT_CMD); /* flush */
790 static u8 ahci_check_status(struct ata_port *ap)
792 void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr;
794 return readl(mmio + PORT_TFDATA) & 0xFF;
797 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
799 struct ahci_port_priv *pp = ap->private_data;
800 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
802 ata_tf_from_fis(d2h_fis, tf);
805 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
807 struct scatterlist *sg;
808 struct ahci_sg *ahci_sg;
809 unsigned int n_sg = 0;
814 * Next, the S/G list.
816 ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
817 ata_for_each_sg(sg, qc) {
818 dma_addr_t addr = sg_dma_address(sg);
819 u32 sg_len = sg_dma_len(sg);
821 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
822 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
823 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
832 static void ahci_qc_prep(struct ata_queued_cmd *qc)
834 struct ata_port *ap = qc->ap;
835 struct ahci_port_priv *pp = ap->private_data;
836 int is_atapi = is_atapi_taskfile(&qc->tf);
839 const u32 cmd_fis_len = 5; /* five dwords */
843 * Fill in command table information. First, the header,
844 * a SATA Register - Host to Device command FIS.
846 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
848 ata_tf_to_fis(&qc->tf, cmd_tbl, 0);
850 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
851 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
855 if (qc->flags & ATA_QCFLAG_DMAMAP)
856 n_elem = ahci_fill_sg(qc, cmd_tbl);
859 * Fill in command slot information.
861 opts = cmd_fis_len | n_elem << 16;
862 if (qc->tf.flags & ATA_TFLAG_WRITE)
863 opts |= AHCI_CMD_WRITE;
865 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
867 ahci_fill_cmd_slot(pp, qc->tag, opts);
870 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
872 struct ahci_port_priv *pp = ap->private_data;
873 struct ata_eh_info *ehi = &ap->eh_info;
874 unsigned int err_mask = 0, action = 0;
875 struct ata_queued_cmd *qc;
878 ata_ehi_clear_desc(ehi);
880 /* AHCI needs SError cleared; otherwise, it might lock up */
881 serror = ahci_scr_read(ap, SCR_ERROR);
882 ahci_scr_write(ap, SCR_ERROR, serror);
884 /* analyze @irq_stat */
885 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
887 if (irq_stat & PORT_IRQ_TF_ERR)
888 err_mask |= AC_ERR_DEV;
890 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
891 err_mask |= AC_ERR_HOST_BUS;
892 action |= ATA_EH_SOFTRESET;
895 if (irq_stat & PORT_IRQ_IF_ERR) {
896 err_mask |= AC_ERR_ATA_BUS;
897 action |= ATA_EH_SOFTRESET;
898 ata_ehi_push_desc(ehi, ", interface fatal error");
901 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
902 ata_ehi_hotplugged(ehi);
903 ata_ehi_push_desc(ehi, ", %s", irq_stat & PORT_IRQ_CONNECT ?
904 "connection status changed" : "PHY RDY changed");
907 if (irq_stat & PORT_IRQ_UNK_FIS) {
908 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
910 err_mask |= AC_ERR_HSM;
911 action |= ATA_EH_SOFTRESET;
912 ata_ehi_push_desc(ehi, ", unknown FIS %08x %08x %08x %08x",
913 unk[0], unk[1], unk[2], unk[3]);
916 /* okay, let's hand over to EH */
917 ehi->serror |= serror;
918 ehi->action |= action;
920 qc = ata_qc_from_tag(ap, ap->active_tag);
922 qc->err_mask |= err_mask;
924 ehi->err_mask |= err_mask;
926 if (irq_stat & PORT_IRQ_FREEZE)
932 static void ahci_host_intr(struct ata_port *ap)
934 void __iomem *mmio = ap->host_set->mmio_base;
935 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
936 struct ata_eh_info *ehi = &ap->eh_info;
937 u32 status, qc_active;
940 status = readl(port_mmio + PORT_IRQ_STAT);
941 writel(status, port_mmio + PORT_IRQ_STAT);
943 if (unlikely(status & PORT_IRQ_ERROR)) {
944 ahci_error_intr(ap, status);
949 qc_active = readl(port_mmio + PORT_SCR_ACT);
951 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
953 rc = ata_qc_complete_multiple(ap, qc_active, NULL);
957 ehi->err_mask |= AC_ERR_HSM;
958 ehi->action |= ATA_EH_SOFTRESET;
963 /* hmmm... a spurious interupt */
965 /* some devices send D2H reg with I bit set during NCQ command phase */
966 if (ap->sactive && status & PORT_IRQ_D2H_REG_FIS)
969 /* ignore interim PIO setup fis interrupts */
970 if (ata_tag_valid(ap->active_tag)) {
971 struct ata_queued_cmd *qc =
972 ata_qc_from_tag(ap, ap->active_tag);
974 if (qc && qc->tf.protocol == ATA_PROT_PIO &&
975 (status & PORT_IRQ_PIOS_FIS))
980 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
981 "(irq_stat 0x%x active_tag %d sactive 0x%x)\n",
982 status, ap->active_tag, ap->sactive);
985 static void ahci_irq_clear(struct ata_port *ap)
990 static irqreturn_t ahci_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
992 struct ata_host_set *host_set = dev_instance;
993 struct ahci_host_priv *hpriv;
994 unsigned int i, handled = 0;
996 u32 irq_stat, irq_ack = 0;
1000 hpriv = host_set->private_data;
1001 mmio = host_set->mmio_base;
1003 /* sigh. 0xffffffff is a valid return from h/w */
1004 irq_stat = readl(mmio + HOST_IRQ_STAT);
1005 irq_stat &= hpriv->port_map;
1009 spin_lock(&host_set->lock);
1011 for (i = 0; i < host_set->n_ports; i++) {
1012 struct ata_port *ap;
1014 if (!(irq_stat & (1 << i)))
1017 ap = host_set->ports[i];
1020 VPRINTK("port %u\n", i);
1022 VPRINTK("port %u (no irq)\n", i);
1023 if (ata_ratelimit())
1024 dev_printk(KERN_WARNING, host_set->dev,
1025 "interrupt on disabled port %u\n", i);
1028 irq_ack |= (1 << i);
1032 writel(irq_ack, mmio + HOST_IRQ_STAT);
1036 spin_unlock(&host_set->lock);
1040 return IRQ_RETVAL(handled);
1043 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1045 struct ata_port *ap = qc->ap;
1046 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
1048 if (qc->tf.protocol == ATA_PROT_NCQ)
1049 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1050 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1051 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1056 static void ahci_freeze(struct ata_port *ap)
1058 void __iomem *mmio = ap->host_set->mmio_base;
1059 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1062 writel(0, port_mmio + PORT_IRQ_MASK);
1065 static void ahci_thaw(struct ata_port *ap)
1067 void __iomem *mmio = ap->host_set->mmio_base;
1068 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1072 tmp = readl(port_mmio + PORT_IRQ_STAT);
1073 writel(tmp, port_mmio + PORT_IRQ_STAT);
1074 writel(1 << ap->id, mmio + HOST_IRQ_STAT);
1076 /* turn IRQ back on */
1077 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
1080 static void ahci_error_handler(struct ata_port *ap)
1082 void __iomem *mmio = ap->host_set->mmio_base;
1083 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1085 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1086 /* restart engine */
1087 ahci_stop_engine(port_mmio);
1088 ahci_start_engine(port_mmio);
1091 /* perform recovery */
1092 ata_do_eh(ap, ahci_prereset, ahci_softreset, ahci_hardreset,
1096 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1098 struct ata_port *ap = qc->ap;
1099 void __iomem *mmio = ap->host_set->mmio_base;
1100 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1102 if (qc->flags & ATA_QCFLAG_FAILED)
1103 qc->err_mask |= AC_ERR_OTHER;
1106 /* make DMA engine forget about the failed command */
1107 ahci_stop_engine(port_mmio);
1108 ahci_start_engine(port_mmio);
1112 static void ahci_setup_port(struct ata_ioports *port, unsigned long base,
1113 unsigned int port_idx)
1115 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
1116 base = ahci_port_base_ul(base, port_idx);
1117 VPRINTK("base now==0x%lx\n", base);
1119 port->cmd_addr = base;
1120 port->scr_addr = base + PORT_SCR;
1125 static int ahci_host_init(struct ata_probe_ent *probe_ent)
1127 struct ahci_host_priv *hpriv = probe_ent->private_data;
1128 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1129 void __iomem *mmio = probe_ent->mmio_base;
1131 unsigned int i, j, using_dac;
1133 void __iomem *port_mmio;
1135 cap_save = readl(mmio + HOST_CAP);
1136 cap_save &= ( (1<<28) | (1<<17) );
1137 cap_save |= (1 << 27);
1139 /* global controller reset */
1140 tmp = readl(mmio + HOST_CTL);
1141 if ((tmp & HOST_RESET) == 0) {
1142 writel(tmp | HOST_RESET, mmio + HOST_CTL);
1143 readl(mmio + HOST_CTL); /* flush */
1146 /* reset must complete within 1 second, or
1147 * the hardware should be considered fried.
1151 tmp = readl(mmio + HOST_CTL);
1152 if (tmp & HOST_RESET) {
1153 dev_printk(KERN_ERR, &pdev->dev,
1154 "controller reset failed (0x%x)\n", tmp);
1158 writel(HOST_AHCI_EN, mmio + HOST_CTL);
1159 (void) readl(mmio + HOST_CTL); /* flush */
1160 writel(cap_save, mmio + HOST_CAP);
1161 writel(0xf, mmio + HOST_PORTS_IMPL);
1162 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
1164 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
1167 pci_read_config_word(pdev, 0x92, &tmp16);
1169 pci_write_config_word(pdev, 0x92, tmp16);
1172 hpriv->cap = readl(mmio + HOST_CAP);
1173 hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
1174 probe_ent->n_ports = (hpriv->cap & 0x1f) + 1;
1176 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
1177 hpriv->cap, hpriv->port_map, probe_ent->n_ports);
1179 using_dac = hpriv->cap & HOST_CAP_64;
1181 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1182 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1184 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1186 dev_printk(KERN_ERR, &pdev->dev,
1187 "64-bit DMA enable failed\n");
1192 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1194 dev_printk(KERN_ERR, &pdev->dev,
1195 "32-bit DMA enable failed\n");
1198 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1200 dev_printk(KERN_ERR, &pdev->dev,
1201 "32-bit consistent DMA enable failed\n");
1206 for (i = 0; i < probe_ent->n_ports; i++) {
1207 #if 0 /* BIOSen initialize this incorrectly */
1208 if (!(hpriv->port_map & (1 << i)))
1212 port_mmio = ahci_port_base(mmio, i);
1213 VPRINTK("mmio %p port_mmio %p\n", mmio, port_mmio);
1215 ahci_setup_port(&probe_ent->port[i],
1216 (unsigned long) mmio, i);
1218 /* make sure port is not active */
1219 tmp = readl(port_mmio + PORT_CMD);
1220 VPRINTK("PORT_CMD 0x%x\n", tmp);
1221 if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
1222 PORT_CMD_FIS_RX | PORT_CMD_START)) {
1223 tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
1224 PORT_CMD_FIS_RX | PORT_CMD_START);
1225 writel(tmp, port_mmio + PORT_CMD);
1226 readl(port_mmio + PORT_CMD); /* flush */
1228 /* spec says 500 msecs for each bit, so
1229 * this is slightly incorrect.
1234 writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD);
1239 tmp = readl(port_mmio + PORT_SCR_STAT);
1240 if ((tmp & 0xf) == 0x3)
1245 tmp = readl(port_mmio + PORT_SCR_ERR);
1246 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
1247 writel(tmp, port_mmio + PORT_SCR_ERR);
1249 /* ack any pending irq events for this port */
1250 tmp = readl(port_mmio + PORT_IRQ_STAT);
1251 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
1253 writel(tmp, port_mmio + PORT_IRQ_STAT);
1255 writel(1 << i, mmio + HOST_IRQ_STAT);
1258 tmp = readl(mmio + HOST_CTL);
1259 VPRINTK("HOST_CTL 0x%x\n", tmp);
1260 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
1261 tmp = readl(mmio + HOST_CTL);
1262 VPRINTK("HOST_CTL 0x%x\n", tmp);
1264 pci_set_master(pdev);
1269 static void ahci_print_info(struct ata_probe_ent *probe_ent)
1271 struct ahci_host_priv *hpriv = probe_ent->private_data;
1272 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1273 void __iomem *mmio = probe_ent->mmio_base;
1274 u32 vers, cap, impl, speed;
1275 const char *speed_s;
1279 vers = readl(mmio + HOST_VERSION);
1281 impl = hpriv->port_map;
1283 speed = (cap >> 20) & 0xf;
1286 else if (speed == 2)
1291 pci_read_config_word(pdev, 0x0a, &cc);
1294 else if (cc == 0x0106)
1296 else if (cc == 0x0104)
1301 dev_printk(KERN_INFO, &pdev->dev,
1302 "AHCI %02x%02x.%02x%02x "
1303 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1306 (vers >> 24) & 0xff,
1307 (vers >> 16) & 0xff,
1311 ((cap >> 8) & 0x1f) + 1,
1317 dev_printk(KERN_INFO, &pdev->dev,
1323 cap & (1 << 31) ? "64bit " : "",
1324 cap & (1 << 30) ? "ncq " : "",
1325 cap & (1 << 28) ? "ilck " : "",
1326 cap & (1 << 27) ? "stag " : "",
1327 cap & (1 << 26) ? "pm " : "",
1328 cap & (1 << 25) ? "led " : "",
1330 cap & (1 << 24) ? "clo " : "",
1331 cap & (1 << 19) ? "nz " : "",
1332 cap & (1 << 18) ? "only " : "",
1333 cap & (1 << 17) ? "pmp " : "",
1334 cap & (1 << 15) ? "pio " : "",
1335 cap & (1 << 14) ? "slum " : "",
1336 cap & (1 << 13) ? "part " : ""
1340 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1342 static int printed_version;
1343 struct ata_probe_ent *probe_ent = NULL;
1344 struct ahci_host_priv *hpriv;
1346 void __iomem *mmio_base;
1347 unsigned int board_idx = (unsigned int) ent->driver_data;
1348 int have_msi, pci_dev_busy = 0;
1353 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
1355 if (!printed_version++)
1356 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1358 /* JMicron-specific fixup: make sure we're in AHCI mode */
1359 /* This is protected from races with ata_jmicron by the pci probe
1361 if (pdev->vendor == PCI_VENDOR_ID_JMICRON) {
1362 /* AHCI enable, AHCI on function 0 */
1363 pci_write_config_byte(pdev, 0x41, 0xa1);
1364 /* Function 1 is the PATA controller */
1365 if (PCI_FUNC(pdev->devfn))
1369 rc = pci_enable_device(pdev);
1373 rc = pci_request_regions(pdev, DRV_NAME);
1379 if (pci_enable_msi(pdev) == 0)
1386 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
1387 if (probe_ent == NULL) {
1392 memset(probe_ent, 0, sizeof(*probe_ent));
1393 probe_ent->dev = pci_dev_to_dev(pdev);
1394 INIT_LIST_HEAD(&probe_ent->node);
1396 mmio_base = pci_iomap(pdev, AHCI_PCI_BAR, 0);
1397 if (mmio_base == NULL) {
1399 goto err_out_free_ent;
1401 base = (unsigned long) mmio_base;
1403 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1406 goto err_out_iounmap;
1408 memset(hpriv, 0, sizeof(*hpriv));
1410 probe_ent->sht = ahci_port_info[board_idx].sht;
1411 probe_ent->host_flags = ahci_port_info[board_idx].host_flags;
1412 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
1413 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
1414 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
1416 probe_ent->irq = pdev->irq;
1417 probe_ent->irq_flags = IRQF_SHARED;
1418 probe_ent->mmio_base = mmio_base;
1419 probe_ent->private_data = hpriv;
1422 hpriv->flags |= AHCI_FLAG_MSI;
1424 /* initialize adapter */
1425 rc = ahci_host_init(probe_ent);
1429 if (!(probe_ent->host_flags & AHCI_FLAG_NO_NCQ) &&
1430 (hpriv->cap & HOST_CAP_NCQ))
1431 probe_ent->host_flags |= ATA_FLAG_NCQ;
1433 ahci_print_info(probe_ent);
1435 /* FIXME: check ata_device_add return value */
1436 ata_device_add(probe_ent);
1444 pci_iounmap(pdev, mmio_base);
1449 pci_disable_msi(pdev);
1452 pci_release_regions(pdev);
1455 pci_disable_device(pdev);
1459 static void ahci_remove_one (struct pci_dev *pdev)
1461 struct device *dev = pci_dev_to_dev(pdev);
1462 struct ata_host_set *host_set = dev_get_drvdata(dev);
1463 struct ahci_host_priv *hpriv = host_set->private_data;
1467 for (i = 0; i < host_set->n_ports; i++)
1468 ata_port_detach(host_set->ports[i]);
1470 have_msi = hpriv->flags & AHCI_FLAG_MSI;
1471 free_irq(host_set->irq, host_set);
1473 for (i = 0; i < host_set->n_ports; i++) {
1474 struct ata_port *ap = host_set->ports[i];
1476 ata_scsi_release(ap->host);
1477 scsi_host_put(ap->host);
1481 pci_iounmap(pdev, host_set->mmio_base);
1485 pci_disable_msi(pdev);
1488 pci_release_regions(pdev);
1489 pci_disable_device(pdev);
1490 dev_set_drvdata(dev, NULL);
1493 static int __init ahci_init(void)
1495 return pci_module_init(&ahci_pci_driver);
1498 static void __exit ahci_exit(void)
1500 pci_unregister_driver(&ahci_pci_driver);
1504 MODULE_AUTHOR("Jeff Garzik");
1505 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1506 MODULE_LICENSE("GPL");
1507 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1508 MODULE_VERSION(DRV_VERSION);
1510 module_init(ahci_init);
1511 module_exit(ahci_exit);