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>
45 #include <scsi/scsi_host.h>
46 #include <linux/libata.h>
49 #define DRV_NAME "ahci"
50 #define DRV_VERSION "1.01"
55 AHCI_MAX_SG = 168, /* hardware max is 64K */
56 AHCI_DMA_BOUNDARY = 0xffffffff,
57 AHCI_USE_CLUSTERING = 0,
58 AHCI_CMD_SLOT_SZ = 32 * 32,
60 AHCI_CMD_TBL_HDR = 0x80,
61 AHCI_CMD_TBL_CDB = 0x40,
62 AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR + (AHCI_MAX_SG * 16),
63 AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ +
65 AHCI_IRQ_ON_SG = (1 << 31),
66 AHCI_CMD_ATAPI = (1 << 5),
67 AHCI_CMD_WRITE = (1 << 6),
69 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
73 /* global controller registers */
74 HOST_CAP = 0x00, /* host capabilities */
75 HOST_CTL = 0x04, /* global host control */
76 HOST_IRQ_STAT = 0x08, /* interrupt status */
77 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
78 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
81 HOST_RESET = (1 << 0), /* reset controller; self-clear */
82 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
83 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
86 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
88 /* registers for each SATA port */
89 PORT_LST_ADDR = 0x00, /* command list DMA addr */
90 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
91 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
92 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
93 PORT_IRQ_STAT = 0x10, /* interrupt status */
94 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
95 PORT_CMD = 0x18, /* port command */
96 PORT_TFDATA = 0x20, /* taskfile data */
97 PORT_SIG = 0x24, /* device TF signature */
98 PORT_CMD_ISSUE = 0x38, /* command issue */
99 PORT_SCR = 0x28, /* SATA phy register block */
100 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
101 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
102 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
103 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
105 /* PORT_IRQ_{STAT,MASK} bits */
106 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
107 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
108 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
109 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
110 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
111 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
112 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
113 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
115 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
116 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
117 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
118 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
119 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
120 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
121 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
122 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
123 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
125 PORT_IRQ_FATAL = PORT_IRQ_TF_ERR |
127 PORT_IRQ_HBUS_DATA_ERR |
129 DEF_PORT_IRQ = PORT_IRQ_FATAL | PORT_IRQ_PHYRDY |
130 PORT_IRQ_CONNECT | PORT_IRQ_SG_DONE |
131 PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_FIS |
132 PORT_IRQ_DMAS_FIS | PORT_IRQ_PIOS_FIS |
133 PORT_IRQ_D2H_REG_FIS,
136 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
137 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
138 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
139 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
140 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
141 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
143 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
144 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
145 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
147 /* hpriv->flags bits */
148 AHCI_FLAG_MSI = (1 << 0),
151 struct ahci_cmd_hdr {
166 struct ahci_host_priv {
168 u32 cap; /* cache of HOST_CAP register */
169 u32 port_map; /* cache of HOST_PORTS_IMPL reg */
172 struct ahci_port_priv {
173 struct ahci_cmd_hdr *cmd_slot;
174 dma_addr_t cmd_slot_dma;
176 dma_addr_t cmd_tbl_dma;
177 struct ahci_sg *cmd_tbl_sg;
179 dma_addr_t rx_fis_dma;
182 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
183 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
184 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
185 static int ahci_qc_issue(struct ata_queued_cmd *qc);
186 static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
187 static void ahci_phy_reset(struct ata_port *ap);
188 static void ahci_irq_clear(struct ata_port *ap);
189 static void ahci_eng_timeout(struct ata_port *ap);
190 static int ahci_port_start(struct ata_port *ap);
191 static void ahci_port_stop(struct ata_port *ap);
192 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
193 static void ahci_qc_prep(struct ata_queued_cmd *qc);
194 static u8 ahci_check_status(struct ata_port *ap);
195 static u8 ahci_check_err(struct ata_port *ap);
196 static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
197 static void ahci_remove_one (struct pci_dev *pdev);
199 static Scsi_Host_Template ahci_sht = {
200 .module = THIS_MODULE,
202 .ioctl = ata_scsi_ioctl,
203 .queuecommand = ata_scsi_queuecmd,
204 .eh_strategy_handler = ata_scsi_error,
205 .can_queue = ATA_DEF_QUEUE,
206 .this_id = ATA_SHT_THIS_ID,
207 .sg_tablesize = AHCI_MAX_SG,
208 .max_sectors = ATA_MAX_SECTORS,
209 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
210 .emulated = ATA_SHT_EMULATED,
211 .use_clustering = AHCI_USE_CLUSTERING,
212 .proc_name = DRV_NAME,
213 .dma_boundary = AHCI_DMA_BOUNDARY,
214 .slave_configure = ata_scsi_slave_config,
215 .bios_param = ata_std_bios_param,
219 static struct ata_port_operations ahci_ops = {
220 .port_disable = ata_port_disable,
222 .check_status = ahci_check_status,
223 .check_altstatus = ahci_check_status,
224 .check_err = ahci_check_err,
225 .dev_select = ata_noop_dev_select,
227 .tf_read = ahci_tf_read,
229 .phy_reset = ahci_phy_reset,
231 .qc_prep = ahci_qc_prep,
232 .qc_issue = ahci_qc_issue,
234 .eng_timeout = ahci_eng_timeout,
236 .irq_handler = ahci_interrupt,
237 .irq_clear = ahci_irq_clear,
239 .scr_read = ahci_scr_read,
240 .scr_write = ahci_scr_write,
242 .port_start = ahci_port_start,
243 .port_stop = ahci_port_stop,
246 static struct ata_port_info ahci_port_info[] = {
250 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
251 ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
253 .pio_mask = 0x03, /* pio3-4 */
254 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
255 .port_ops = &ahci_ops,
259 static struct pci_device_id ahci_pci_tbl[] = {
260 { PCI_VENDOR_ID_INTEL, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
261 board_ahci }, /* ICH6 */
262 { PCI_VENDOR_ID_INTEL, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
263 board_ahci }, /* ICH6M */
264 { PCI_VENDOR_ID_INTEL, 0x27c1, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
265 board_ahci }, /* ICH7 */
266 { PCI_VENDOR_ID_INTEL, 0x27c5, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
267 board_ahci }, /* ICH7M */
268 { PCI_VENDOR_ID_INTEL, 0x27c3, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
269 board_ahci }, /* ICH7R */
270 { PCI_VENDOR_ID_AL, 0x5288, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
271 board_ahci }, /* ULi M5288 */
272 { PCI_VENDOR_ID_INTEL, 0x2681, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
273 board_ahci }, /* ESB2 */
274 { PCI_VENDOR_ID_INTEL, 0x2682, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
275 board_ahci }, /* ESB2 */
276 { PCI_VENDOR_ID_INTEL, 0x2683, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
277 board_ahci }, /* ESB2 */
278 { PCI_VENDOR_ID_INTEL, 0x27c6, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
279 board_ahci }, /* ICH7-M DH */
280 { } /* terminate list */
284 static struct pci_driver ahci_pci_driver = {
286 .id_table = ahci_pci_tbl,
287 .probe = ahci_init_one,
288 .remove = ahci_remove_one,
292 static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port)
294 return base + 0x100 + (port * 0x80);
297 static inline void *ahci_port_base (void *base, unsigned int port)
299 return (void *) ahci_port_base_ul((unsigned long)base, port);
302 static int ahci_port_start(struct ata_port *ap)
304 struct device *dev = ap->host_set->dev;
305 struct ahci_host_priv *hpriv = ap->host_set->private_data;
306 struct ahci_port_priv *pp;
307 void *mem, *mmio = ap->host_set->mmio_base;
308 void *port_mmio = ahci_port_base(mmio, ap->port_no);
311 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
314 memset(pp, 0, sizeof(*pp));
316 mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);
321 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
324 * First item in chunk of DMA memory: 32-slot command table,
325 * 32 bytes each in size
328 pp->cmd_slot_dma = mem_dma;
330 mem += AHCI_CMD_SLOT_SZ;
331 mem_dma += AHCI_CMD_SLOT_SZ;
334 * Second item: Received-FIS area
337 pp->rx_fis_dma = mem_dma;
339 mem += AHCI_RX_FIS_SZ;
340 mem_dma += AHCI_RX_FIS_SZ;
343 * Third item: data area for storing a single command
344 * and its scatter-gather table
347 pp->cmd_tbl_dma = mem_dma;
349 pp->cmd_tbl_sg = mem + AHCI_CMD_TBL_HDR;
351 ap->private_data = pp;
353 if (hpriv->cap & HOST_CAP_64)
354 writel((pp->cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
355 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
356 readl(port_mmio + PORT_LST_ADDR); /* flush */
358 if (hpriv->cap & HOST_CAP_64)
359 writel((pp->rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
360 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
361 readl(port_mmio + PORT_FIS_ADDR); /* flush */
363 writel(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX |
364 PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP |
365 PORT_CMD_START, port_mmio + PORT_CMD);
366 readl(port_mmio + PORT_CMD); /* flush */
372 static void ahci_port_stop(struct ata_port *ap)
374 struct device *dev = ap->host_set->dev;
375 struct ahci_port_priv *pp = ap->private_data;
376 void *mmio = ap->host_set->mmio_base;
377 void *port_mmio = ahci_port_base(mmio, ap->port_no);
380 tmp = readl(port_mmio + PORT_CMD);
381 tmp &= ~(PORT_CMD_START | PORT_CMD_FIS_RX);
382 writel(tmp, port_mmio + PORT_CMD);
383 readl(port_mmio + PORT_CMD); /* flush */
385 /* spec says 500 msecs for each PORT_CMD_{START,FIS_RX} bit, so
386 * this is slightly incorrect.
390 ap->private_data = NULL;
391 dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,
392 pp->cmd_slot, pp->cmd_slot_dma);
396 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
401 case SCR_STATUS: sc_reg = 0; break;
402 case SCR_CONTROL: sc_reg = 1; break;
403 case SCR_ERROR: sc_reg = 2; break;
404 case SCR_ACTIVE: sc_reg = 3; break;
409 return readl((void *) ap->ioaddr.scr_addr + (sc_reg * 4));
413 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
419 case SCR_STATUS: sc_reg = 0; break;
420 case SCR_CONTROL: sc_reg = 1; break;
421 case SCR_ERROR: sc_reg = 2; break;
422 case SCR_ACTIVE: sc_reg = 3; break;
427 writel(val, (void *) ap->ioaddr.scr_addr + (sc_reg * 4));
430 static void ahci_phy_reset(struct ata_port *ap)
432 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
433 struct ata_taskfile tf;
434 struct ata_device *dev = &ap->device[0];
437 __sata_phy_reset(ap);
439 if (ap->flags & ATA_FLAG_PORT_DISABLED)
442 tmp = readl(port_mmio + PORT_SIG);
443 tf.lbah = (tmp >> 24) & 0xff;
444 tf.lbam = (tmp >> 16) & 0xff;
445 tf.lbal = (tmp >> 8) & 0xff;
446 tf.nsect = (tmp) & 0xff;
448 dev->class = ata_dev_classify(&tf);
449 if (!ata_dev_present(dev))
450 ata_port_disable(ap);
453 static u8 ahci_check_status(struct ata_port *ap)
455 void *mmio = (void *) ap->ioaddr.cmd_addr;
457 return readl(mmio + PORT_TFDATA) & 0xFF;
460 static u8 ahci_check_err(struct ata_port *ap)
462 void *mmio = (void *) ap->ioaddr.cmd_addr;
464 return (readl(mmio + PORT_TFDATA) >> 8) & 0xFF;
467 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
469 struct ahci_port_priv *pp = ap->private_data;
470 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
472 ata_tf_from_fis(d2h_fis, tf);
475 static void ahci_fill_sg(struct ata_queued_cmd *qc)
477 struct ahci_port_priv *pp = qc->ap->private_data;
483 * Next, the S/G list.
485 for (i = 0; i < qc->n_elem; i++) {
489 addr = sg_dma_address(&qc->sg[i]);
490 sg_len = sg_dma_len(&qc->sg[i]);
492 pp->cmd_tbl_sg[i].addr = cpu_to_le32(addr & 0xffffffff);
493 pp->cmd_tbl_sg[i].addr_hi = cpu_to_le32((addr >> 16) >> 16);
494 pp->cmd_tbl_sg[i].flags_size = cpu_to_le32(sg_len - 1);
498 static void ahci_qc_prep(struct ata_queued_cmd *qc)
500 struct ata_port *ap = qc->ap;
501 struct ahci_port_priv *pp = ap->private_data;
503 const u32 cmd_fis_len = 5; /* five dwords */
506 * Fill in command slot information (currently only one slot,
507 * slot 0, is currently since we don't do queueing)
510 opts = (qc->n_elem << 16) | cmd_fis_len;
511 if (qc->tf.flags & ATA_TFLAG_WRITE)
512 opts |= AHCI_CMD_WRITE;
513 if (is_atapi_taskfile(&qc->tf))
514 opts |= AHCI_CMD_ATAPI;
516 pp->cmd_slot[0].opts = cpu_to_le32(opts);
517 pp->cmd_slot[0].status = 0;
518 pp->cmd_slot[0].tbl_addr = cpu_to_le32(pp->cmd_tbl_dma & 0xffffffff);
519 pp->cmd_slot[0].tbl_addr_hi = cpu_to_le32((pp->cmd_tbl_dma >> 16) >> 16);
522 * Fill in command table information. First, the header,
523 * a SATA Register - Host to Device command FIS.
525 ata_tf_to_fis(&qc->tf, pp->cmd_tbl, 0);
526 if (opts & AHCI_CMD_ATAPI) {
527 memset(pp->cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
528 memcpy(pp->cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, ap->cdb_len);
531 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
537 static void ahci_intr_error(struct ata_port *ap, u32 irq_stat)
539 void *mmio = ap->host_set->mmio_base;
540 void *port_mmio = ahci_port_base(mmio, ap->port_no);
545 tmp = readl(port_mmio + PORT_CMD);
546 tmp &= ~PORT_CMD_START;
547 writel(tmp, port_mmio + PORT_CMD);
549 /* wait for engine to stop. TODO: this could be
550 * as long as 500 msec
554 tmp = readl(port_mmio + PORT_CMD);
555 if ((tmp & PORT_CMD_LIST_ON) == 0)
560 /* clear SATA phy error, if any */
561 tmp = readl(port_mmio + PORT_SCR_ERR);
562 writel(tmp, port_mmio + PORT_SCR_ERR);
564 /* if DRQ/BSY is set, device needs to be reset.
565 * if so, issue COMRESET
567 tmp = readl(port_mmio + PORT_TFDATA);
568 if (tmp & (ATA_BUSY | ATA_DRQ)) {
569 writel(0x301, port_mmio + PORT_SCR_CTL);
570 readl(port_mmio + PORT_SCR_CTL); /* flush */
572 writel(0x300, port_mmio + PORT_SCR_CTL);
573 readl(port_mmio + PORT_SCR_CTL); /* flush */
577 tmp = readl(port_mmio + PORT_CMD);
578 tmp |= PORT_CMD_START;
579 writel(tmp, port_mmio + PORT_CMD);
580 readl(port_mmio + PORT_CMD); /* flush */
582 printk(KERN_WARNING "ata%u: error occurred, port reset\n", ap->id);
585 static void ahci_eng_timeout(struct ata_port *ap)
587 struct ata_host_set *host_set = ap->host_set;
588 void *mmio = host_set->mmio_base;
589 void *port_mmio = ahci_port_base(mmio, ap->port_no);
590 struct ata_queued_cmd *qc;
595 spin_lock_irqsave(&host_set->lock, flags);
597 ahci_intr_error(ap, readl(port_mmio + PORT_IRQ_STAT));
599 qc = ata_qc_from_tag(ap, ap->active_tag);
601 printk(KERN_ERR "ata%u: BUG: timeout without command\n",
604 /* hack alert! We cannot use the supplied completion
605 * function from inside the ->eh_strategy_handler() thread.
606 * libata is the only user of ->eh_strategy_handler() in
607 * any kernel, so the default scsi_done() assumes it is
608 * not being called from the SCSI EH.
610 qc->scsidone = scsi_finish_command;
611 ata_qc_complete(qc, ATA_ERR);
614 spin_unlock_irqrestore(&host_set->lock, flags);
617 static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
619 void *mmio = ap->host_set->mmio_base;
620 void *port_mmio = ahci_port_base(mmio, ap->port_no);
621 u32 status, serr, ci;
623 serr = readl(port_mmio + PORT_SCR_ERR);
624 writel(serr, port_mmio + PORT_SCR_ERR);
626 status = readl(port_mmio + PORT_IRQ_STAT);
627 writel(status, port_mmio + PORT_IRQ_STAT);
629 ci = readl(port_mmio + PORT_CMD_ISSUE);
630 if (likely((ci & 0x1) == 0)) {
632 ata_qc_complete(qc, 0);
637 if (status & PORT_IRQ_FATAL) {
638 ahci_intr_error(ap, status);
640 ata_qc_complete(qc, ATA_ERR);
646 static void ahci_irq_clear(struct ata_port *ap)
651 static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
653 struct ata_host_set *host_set = dev_instance;
654 struct ahci_host_priv *hpriv;
655 unsigned int i, handled = 0;
657 u32 irq_stat, irq_ack = 0;
661 hpriv = host_set->private_data;
662 mmio = host_set->mmio_base;
664 /* sigh. 0xffffffff is a valid return from h/w */
665 irq_stat = readl(mmio + HOST_IRQ_STAT);
666 irq_stat &= hpriv->port_map;
670 spin_lock(&host_set->lock);
672 for (i = 0; i < host_set->n_ports; i++) {
676 VPRINTK("port %u\n", i);
677 ap = host_set->ports[i];
678 tmp = irq_stat & (1 << i);
680 struct ata_queued_cmd *qc;
681 qc = ata_qc_from_tag(ap, ap->active_tag);
682 if (ahci_host_intr(ap, qc))
688 writel(irq_ack, mmio + HOST_IRQ_STAT);
692 spin_unlock(&host_set->lock);
696 return IRQ_RETVAL(handled);
699 static int ahci_qc_issue(struct ata_queued_cmd *qc)
701 struct ata_port *ap = qc->ap;
702 void *port_mmio = (void *) ap->ioaddr.cmd_addr;
704 writel(1, port_mmio + PORT_CMD_ISSUE);
705 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
710 static void ahci_setup_port(struct ata_ioports *port, unsigned long base,
711 unsigned int port_idx)
713 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
714 base = ahci_port_base_ul(base, port_idx);
715 VPRINTK("base now==0x%lx\n", base);
717 port->cmd_addr = base;
718 port->scr_addr = base + PORT_SCR;
723 static int ahci_host_init(struct ata_probe_ent *probe_ent)
725 struct ahci_host_priv *hpriv = probe_ent->private_data;
726 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
727 void __iomem *mmio = probe_ent->mmio_base;
730 unsigned int i, j, using_dac;
732 void __iomem *port_mmio;
734 cap_save = readl(mmio + HOST_CAP);
735 cap_save &= ( (1<<28) | (1<<17) );
736 cap_save |= (1 << 27);
738 /* global controller reset */
739 tmp = readl(mmio + HOST_CTL);
740 if ((tmp & HOST_RESET) == 0) {
741 writel(tmp | HOST_RESET, mmio + HOST_CTL);
742 readl(mmio + HOST_CTL); /* flush */
745 /* reset must complete within 1 second, or
746 * the hardware should be considered fried.
750 tmp = readl(mmio + HOST_CTL);
751 if (tmp & HOST_RESET) {
752 printk(KERN_ERR DRV_NAME "(%s): controller reset failed (0x%x)\n",
753 pci_name(pdev), tmp);
757 writel(HOST_AHCI_EN, mmio + HOST_CTL);
758 (void) readl(mmio + HOST_CTL); /* flush */
759 writel(cap_save, mmio + HOST_CAP);
760 writel(0xf, mmio + HOST_PORTS_IMPL);
761 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
763 pci_read_config_word(pdev, 0x92, &tmp16);
765 pci_write_config_word(pdev, 0x92, tmp16);
767 hpriv->cap = readl(mmio + HOST_CAP);
768 hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
769 probe_ent->n_ports = (hpriv->cap & 0x1f) + 1;
771 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
772 hpriv->cap, hpriv->port_map, probe_ent->n_ports);
774 using_dac = hpriv->cap & HOST_CAP_64;
776 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
777 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
779 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
781 printk(KERN_ERR DRV_NAME "(%s): 64-bit DMA enable failed\n",
787 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
789 printk(KERN_ERR DRV_NAME "(%s): 32-bit DMA enable failed\n",
793 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
795 printk(KERN_ERR DRV_NAME "(%s): 32-bit consistent DMA enable failed\n",
801 for (i = 0; i < probe_ent->n_ports; i++) {
802 #if 0 /* BIOSen initialize this incorrectly */
803 if (!(hpriv->port_map & (1 << i)))
807 port_mmio = ahci_port_base(mmio, i);
808 VPRINTK("mmio %p port_mmio %p\n", mmio, port_mmio);
810 ahci_setup_port(&probe_ent->port[i],
811 (unsigned long) mmio, i);
813 /* make sure port is not active */
814 tmp = readl(port_mmio + PORT_CMD);
815 VPRINTK("PORT_CMD 0x%x\n", tmp);
816 if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
817 PORT_CMD_FIS_RX | PORT_CMD_START)) {
818 tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
819 PORT_CMD_FIS_RX | PORT_CMD_START);
820 writel(tmp, port_mmio + PORT_CMD);
821 readl(port_mmio + PORT_CMD); /* flush */
823 /* spec says 500 msecs for each bit, so
824 * this is slightly incorrect.
829 writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD);
834 tmp = readl(port_mmio + PORT_SCR_STAT);
835 if ((tmp & 0xf) == 0x3)
840 tmp = readl(port_mmio + PORT_SCR_ERR);
841 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
842 writel(tmp, port_mmio + PORT_SCR_ERR);
844 /* ack any pending irq events for this port */
845 tmp = readl(port_mmio + PORT_IRQ_STAT);
846 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
848 writel(tmp, port_mmio + PORT_IRQ_STAT);
850 writel(1 << i, mmio + HOST_IRQ_STAT);
852 /* set irq mask (enables interrupts) */
853 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
856 tmp = readl(mmio + HOST_CTL);
857 VPRINTK("HOST_CTL 0x%x\n", tmp);
858 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
859 tmp = readl(mmio + HOST_CTL);
860 VPRINTK("HOST_CTL 0x%x\n", tmp);
862 pci_set_master(pdev);
867 /* move to PCI layer, integrate w/ MSI stuff */
868 static void pci_intx(struct pci_dev *pdev, int enable)
870 u16 pci_command, new;
872 pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
875 new = pci_command & ~PCI_COMMAND_INTX_DISABLE;
877 new = pci_command | PCI_COMMAND_INTX_DISABLE;
879 if (new != pci_command)
880 pci_write_config_word(pdev, PCI_COMMAND, pci_command);
883 static void ahci_print_info(struct ata_probe_ent *probe_ent)
885 struct ahci_host_priv *hpriv = probe_ent->private_data;
886 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
887 void *mmio = probe_ent->mmio_base;
888 u32 vers, cap, impl, speed;
893 vers = readl(mmio + HOST_VERSION);
895 impl = hpriv->port_map;
897 speed = (cap >> 20) & 0xf;
905 pci_read_config_word(pdev, 0x0a, &cc);
908 else if (cc == 0x0106)
910 else if (cc == 0x0104)
915 printk(KERN_INFO DRV_NAME "(%s) AHCI %02x%02x.%02x%02x "
916 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
925 ((cap >> 8) & 0x1f) + 1,
931 printk(KERN_INFO DRV_NAME "(%s) flags: "
937 cap & (1 << 31) ? "64bit " : "",
938 cap & (1 << 30) ? "ncq " : "",
939 cap & (1 << 28) ? "ilck " : "",
940 cap & (1 << 27) ? "stag " : "",
941 cap & (1 << 26) ? "pm " : "",
942 cap & (1 << 25) ? "led " : "",
944 cap & (1 << 24) ? "clo " : "",
945 cap & (1 << 19) ? "nz " : "",
946 cap & (1 << 18) ? "only " : "",
947 cap & (1 << 17) ? "pmp " : "",
948 cap & (1 << 15) ? "pio " : "",
949 cap & (1 << 14) ? "slum " : "",
950 cap & (1 << 13) ? "part " : ""
954 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
956 static int printed_version;
957 struct ata_probe_ent *probe_ent = NULL;
958 struct ahci_host_priv *hpriv;
961 unsigned int board_idx = (unsigned int) ent->driver_data;
962 int have_msi, pci_dev_busy = 0;
967 if (!printed_version++)
968 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
970 rc = pci_enable_device(pdev);
974 rc = pci_request_regions(pdev, DRV_NAME);
980 if (pci_enable_msi(pdev) == 0)
987 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
988 if (probe_ent == NULL) {
993 memset(probe_ent, 0, sizeof(*probe_ent));
994 probe_ent->dev = pci_dev_to_dev(pdev);
995 INIT_LIST_HEAD(&probe_ent->node);
997 mmio_base = ioremap(pci_resource_start(pdev, AHCI_PCI_BAR),
998 pci_resource_len(pdev, AHCI_PCI_BAR));
999 if (mmio_base == NULL) {
1001 goto err_out_free_ent;
1003 base = (unsigned long) mmio_base;
1005 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1008 goto err_out_iounmap;
1010 memset(hpriv, 0, sizeof(*hpriv));
1012 probe_ent->sht = ahci_port_info[board_idx].sht;
1013 probe_ent->host_flags = ahci_port_info[board_idx].host_flags;
1014 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
1015 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
1016 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
1018 probe_ent->irq = pdev->irq;
1019 probe_ent->irq_flags = SA_SHIRQ;
1020 probe_ent->mmio_base = mmio_base;
1021 probe_ent->private_data = hpriv;
1024 hpriv->flags |= AHCI_FLAG_MSI;
1026 /* initialize adapter */
1027 rc = ahci_host_init(probe_ent);
1031 ahci_print_info(probe_ent);
1033 /* FIXME: check ata_device_add return value */
1034 ata_device_add(probe_ent);
1047 pci_disable_msi(pdev);
1050 pci_release_regions(pdev);
1053 pci_disable_device(pdev);
1057 static void ahci_remove_one (struct pci_dev *pdev)
1059 struct device *dev = pci_dev_to_dev(pdev);
1060 struct ata_host_set *host_set = dev_get_drvdata(dev);
1061 struct ahci_host_priv *hpriv = host_set->private_data;
1062 struct ata_port *ap;
1066 for (i = 0; i < host_set->n_ports; i++) {
1067 ap = host_set->ports[i];
1069 scsi_remove_host(ap->host);
1072 have_msi = hpriv->flags & AHCI_FLAG_MSI;
1073 free_irq(host_set->irq, host_set);
1075 for (i = 0; i < host_set->n_ports; i++) {
1076 ap = host_set->ports[i];
1078 ata_scsi_release(ap->host);
1079 scsi_host_put(ap->host);
1083 iounmap(host_set->mmio_base);
1087 pci_disable_msi(pdev);
1090 pci_release_regions(pdev);
1091 pci_disable_device(pdev);
1092 dev_set_drvdata(dev, NULL);
1095 static int __init ahci_init(void)
1097 return pci_module_init(&ahci_pci_driver);
1100 static void __exit ahci_exit(void)
1102 pci_unregister_driver(&ahci_pci_driver);
1106 MODULE_AUTHOR("Jeff Garzik");
1107 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1108 MODULE_LICENSE("GPL");
1109 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1110 MODULE_VERSION(DRV_VERSION);
1112 module_init(ahci_init);
1113 module_exit(ahci_exit);