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 "1.2"
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),
70 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
74 /* global controller registers */
75 HOST_CAP = 0x00, /* host capabilities */
76 HOST_CTL = 0x04, /* global host control */
77 HOST_IRQ_STAT = 0x08, /* interrupt status */
78 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
79 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
82 HOST_RESET = (1 << 0), /* reset controller; self-clear */
83 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
84 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
87 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
89 /* registers for each SATA port */
90 PORT_LST_ADDR = 0x00, /* command list DMA addr */
91 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
92 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
93 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
94 PORT_IRQ_STAT = 0x10, /* interrupt status */
95 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
96 PORT_CMD = 0x18, /* port command */
97 PORT_TFDATA = 0x20, /* taskfile data */
98 PORT_SIG = 0x24, /* device TF signature */
99 PORT_CMD_ISSUE = 0x38, /* command issue */
100 PORT_SCR = 0x28, /* SATA phy register block */
101 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
102 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
103 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
104 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
106 /* PORT_IRQ_{STAT,MASK} bits */
107 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
108 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
109 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
110 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
111 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
112 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
113 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
114 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
116 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
117 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
118 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
119 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
120 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
121 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
122 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
123 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
124 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
126 PORT_IRQ_FATAL = PORT_IRQ_TF_ERR |
128 PORT_IRQ_HBUS_DATA_ERR |
130 DEF_PORT_IRQ = PORT_IRQ_FATAL | PORT_IRQ_PHYRDY |
131 PORT_IRQ_CONNECT | PORT_IRQ_SG_DONE |
132 PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_FIS |
133 PORT_IRQ_DMAS_FIS | PORT_IRQ_PIOS_FIS |
134 PORT_IRQ_D2H_REG_FIS,
137 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
138 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
139 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
140 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
141 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
142 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
143 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
145 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
146 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
147 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
149 /* hpriv->flags bits */
150 AHCI_FLAG_MSI = (1 << 0),
153 struct ahci_cmd_hdr {
168 struct ahci_host_priv {
170 u32 cap; /* cache of HOST_CAP register */
171 u32 port_map; /* cache of HOST_PORTS_IMPL reg */
174 struct ahci_port_priv {
175 struct ahci_cmd_hdr *cmd_slot;
176 dma_addr_t cmd_slot_dma;
178 dma_addr_t cmd_tbl_dma;
179 struct ahci_sg *cmd_tbl_sg;
181 dma_addr_t rx_fis_dma;
184 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
185 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
186 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
187 static int ahci_qc_issue(struct ata_queued_cmd *qc);
188 static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
189 static void ahci_phy_reset(struct ata_port *ap);
190 static void ahci_irq_clear(struct ata_port *ap);
191 static void ahci_eng_timeout(struct ata_port *ap);
192 static int ahci_port_start(struct ata_port *ap);
193 static void ahci_port_stop(struct ata_port *ap);
194 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
195 static void ahci_qc_prep(struct ata_queued_cmd *qc);
196 static u8 ahci_check_status(struct ata_port *ap);
197 static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
198 static void ahci_remove_one (struct pci_dev *pdev);
200 static struct scsi_host_template ahci_sht = {
201 .module = THIS_MODULE,
203 .ioctl = ata_scsi_ioctl,
204 .queuecommand = ata_scsi_queuecmd,
205 .eh_strategy_handler = ata_scsi_error,
206 .can_queue = ATA_DEF_QUEUE,
207 .this_id = ATA_SHT_THIS_ID,
208 .sg_tablesize = AHCI_MAX_SG,
209 .max_sectors = ATA_MAX_SECTORS,
210 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
211 .emulated = ATA_SHT_EMULATED,
212 .use_clustering = AHCI_USE_CLUSTERING,
213 .proc_name = DRV_NAME,
214 .dma_boundary = AHCI_DMA_BOUNDARY,
215 .slave_configure = ata_scsi_slave_config,
216 .bios_param = ata_std_bios_param,
219 static const 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 .dev_select = ata_noop_dev_select,
226 .tf_read = ahci_tf_read,
228 .phy_reset = ahci_phy_reset,
230 .qc_prep = ahci_qc_prep,
231 .qc_issue = ahci_qc_issue,
233 .eng_timeout = ahci_eng_timeout,
235 .irq_handler = ahci_interrupt,
236 .irq_clear = ahci_irq_clear,
238 .scr_read = ahci_scr_read,
239 .scr_write = ahci_scr_write,
241 .port_start = ahci_port_start,
242 .port_stop = ahci_port_stop,
245 static const struct ata_port_info ahci_port_info[] = {
249 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
250 ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
252 .pio_mask = 0x1f, /* pio0-4 */
253 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
254 .port_ops = &ahci_ops,
258 static const struct pci_device_id ahci_pci_tbl[] = {
259 { PCI_VENDOR_ID_INTEL, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
260 board_ahci }, /* ICH6 */
261 { PCI_VENDOR_ID_INTEL, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
262 board_ahci }, /* ICH6M */
263 { PCI_VENDOR_ID_INTEL, 0x27c1, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
264 board_ahci }, /* ICH7 */
265 { PCI_VENDOR_ID_INTEL, 0x27c5, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
266 board_ahci }, /* ICH7M */
267 { PCI_VENDOR_ID_INTEL, 0x27c3, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
268 board_ahci }, /* ICH7R */
269 { PCI_VENDOR_ID_AL, 0x5288, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
270 board_ahci }, /* ULi M5288 */
271 { PCI_VENDOR_ID_INTEL, 0x2681, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
272 board_ahci }, /* ESB2 */
273 { PCI_VENDOR_ID_INTEL, 0x2682, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
274 board_ahci }, /* ESB2 */
275 { PCI_VENDOR_ID_INTEL, 0x2683, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
276 board_ahci }, /* ESB2 */
277 { PCI_VENDOR_ID_INTEL, 0x27c6, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
278 board_ahci }, /* ICH7-M DH */
279 { } /* terminate list */
283 static struct pci_driver ahci_pci_driver = {
285 .id_table = ahci_pci_tbl,
286 .probe = ahci_init_one,
287 .remove = ahci_remove_one,
291 static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port)
293 return base + 0x100 + (port * 0x80);
296 static inline void __iomem *ahci_port_base (void __iomem *base, unsigned int port)
298 return (void __iomem *) ahci_port_base_ul((unsigned long)base, port);
301 static int ahci_port_start(struct ata_port *ap)
303 struct device *dev = ap->host_set->dev;
304 struct ahci_host_priv *hpriv = ap->host_set->private_data;
305 struct ahci_port_priv *pp;
306 void __iomem *mmio = ap->host_set->mmio_base;
307 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
312 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
315 memset(pp, 0, sizeof(*pp));
317 rc = ata_pad_alloc(ap, dev);
323 mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);
325 ata_pad_free(ap, dev);
329 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
332 * First item in chunk of DMA memory: 32-slot command table,
333 * 32 bytes each in size
336 pp->cmd_slot_dma = mem_dma;
338 mem += AHCI_CMD_SLOT_SZ;
339 mem_dma += AHCI_CMD_SLOT_SZ;
342 * Second item: Received-FIS area
345 pp->rx_fis_dma = mem_dma;
347 mem += AHCI_RX_FIS_SZ;
348 mem_dma += AHCI_RX_FIS_SZ;
351 * Third item: data area for storing a single command
352 * and its scatter-gather table
355 pp->cmd_tbl_dma = mem_dma;
357 pp->cmd_tbl_sg = mem + AHCI_CMD_TBL_HDR;
359 ap->private_data = pp;
361 if (hpriv->cap & HOST_CAP_64)
362 writel((pp->cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
363 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
364 readl(port_mmio + PORT_LST_ADDR); /* flush */
366 if (hpriv->cap & HOST_CAP_64)
367 writel((pp->rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
368 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
369 readl(port_mmio + PORT_FIS_ADDR); /* flush */
371 writel(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX |
372 PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP |
373 PORT_CMD_START, port_mmio + PORT_CMD);
374 readl(port_mmio + PORT_CMD); /* flush */
380 static void ahci_port_stop(struct ata_port *ap)
382 struct device *dev = ap->host_set->dev;
383 struct ahci_port_priv *pp = ap->private_data;
384 void __iomem *mmio = ap->host_set->mmio_base;
385 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
388 tmp = readl(port_mmio + PORT_CMD);
389 tmp &= ~(PORT_CMD_START | PORT_CMD_FIS_RX);
390 writel(tmp, port_mmio + PORT_CMD);
391 readl(port_mmio + PORT_CMD); /* flush */
393 /* spec says 500 msecs for each PORT_CMD_{START,FIS_RX} bit, so
394 * this is slightly incorrect.
398 ap->private_data = NULL;
399 dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,
400 pp->cmd_slot, pp->cmd_slot_dma);
401 ata_pad_free(ap, dev);
405 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
410 case SCR_STATUS: sc_reg = 0; break;
411 case SCR_CONTROL: sc_reg = 1; break;
412 case SCR_ERROR: sc_reg = 2; break;
413 case SCR_ACTIVE: sc_reg = 3; break;
418 return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
422 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
428 case SCR_STATUS: sc_reg = 0; break;
429 case SCR_CONTROL: sc_reg = 1; break;
430 case SCR_ERROR: sc_reg = 2; break;
431 case SCR_ACTIVE: sc_reg = 3; break;
436 writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
439 static void ahci_phy_reset(struct ata_port *ap)
441 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
442 struct ata_taskfile tf;
443 struct ata_device *dev = &ap->device[0];
446 __sata_phy_reset(ap);
448 if (ap->flags & ATA_FLAG_PORT_DISABLED)
451 tmp = readl(port_mmio + PORT_SIG);
452 tf.lbah = (tmp >> 24) & 0xff;
453 tf.lbam = (tmp >> 16) & 0xff;
454 tf.lbal = (tmp >> 8) & 0xff;
455 tf.nsect = (tmp) & 0xff;
457 dev->class = ata_dev_classify(&tf);
458 if (!ata_dev_present(dev)) {
459 ata_port_disable(ap);
463 /* Make sure port's ATAPI bit is set appropriately */
464 new_tmp = tmp = readl(port_mmio + PORT_CMD);
465 if (dev->class == ATA_DEV_ATAPI)
466 new_tmp |= PORT_CMD_ATAPI;
468 new_tmp &= ~PORT_CMD_ATAPI;
469 if (new_tmp != tmp) {
470 writel(new_tmp, port_mmio + PORT_CMD);
471 readl(port_mmio + PORT_CMD); /* flush */
475 static u8 ahci_check_status(struct ata_port *ap)
477 void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr;
479 return readl(mmio + PORT_TFDATA) & 0xFF;
482 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
484 struct ahci_port_priv *pp = ap->private_data;
485 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
487 ata_tf_from_fis(d2h_fis, tf);
490 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc)
492 struct ahci_port_priv *pp = qc->ap->private_data;
493 struct scatterlist *sg;
494 struct ahci_sg *ahci_sg;
495 unsigned int n_sg = 0;
500 * Next, the S/G list.
502 ahci_sg = pp->cmd_tbl_sg;
503 ata_for_each_sg(sg, qc) {
504 dma_addr_t addr = sg_dma_address(sg);
505 u32 sg_len = sg_dma_len(sg);
507 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
508 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
509 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
518 static void ahci_qc_prep(struct ata_queued_cmd *qc)
520 struct ata_port *ap = qc->ap;
521 struct ahci_port_priv *pp = ap->private_data;
523 const u32 cmd_fis_len = 5; /* five dwords */
527 * Fill in command slot information (currently only one slot,
528 * slot 0, is currently since we don't do queueing)
532 if (qc->tf.flags & ATA_TFLAG_WRITE)
533 opts |= AHCI_CMD_WRITE;
534 if (is_atapi_taskfile(&qc->tf))
535 opts |= AHCI_CMD_ATAPI;
537 pp->cmd_slot[0].opts = cpu_to_le32(opts);
538 pp->cmd_slot[0].status = 0;
539 pp->cmd_slot[0].tbl_addr = cpu_to_le32(pp->cmd_tbl_dma & 0xffffffff);
540 pp->cmd_slot[0].tbl_addr_hi = cpu_to_le32((pp->cmd_tbl_dma >> 16) >> 16);
543 * Fill in command table information. First, the header,
544 * a SATA Register - Host to Device command FIS.
546 ata_tf_to_fis(&qc->tf, pp->cmd_tbl, 0);
547 if (opts & AHCI_CMD_ATAPI) {
548 memset(pp->cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
549 memcpy(pp->cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, ap->cdb_len);
552 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
555 n_elem = ahci_fill_sg(qc);
557 pp->cmd_slot[0].opts |= cpu_to_le32(n_elem << 16);
560 static void ahci_restart_port(struct ata_port *ap, u32 irq_stat)
562 void __iomem *mmio = ap->host_set->mmio_base;
563 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
567 if ((ap->device[0].class != ATA_DEV_ATAPI) ||
568 ((irq_stat & PORT_IRQ_TF_ERR) == 0))
569 printk(KERN_WARNING "ata%u: port reset, "
570 "p_is %x is %x pis %x cmd %x tf %x ss %x se %x\n",
573 readl(mmio + HOST_IRQ_STAT),
574 readl(port_mmio + PORT_IRQ_STAT),
575 readl(port_mmio + PORT_CMD),
576 readl(port_mmio + PORT_TFDATA),
577 readl(port_mmio + PORT_SCR_STAT),
578 readl(port_mmio + PORT_SCR_ERR));
581 tmp = readl(port_mmio + PORT_CMD);
582 tmp &= ~PORT_CMD_START;
583 writel(tmp, port_mmio + PORT_CMD);
585 /* wait for engine to stop. TODO: this could be
586 * as long as 500 msec
590 tmp = readl(port_mmio + PORT_CMD);
591 if ((tmp & PORT_CMD_LIST_ON) == 0)
596 /* clear SATA phy error, if any */
597 tmp = readl(port_mmio + PORT_SCR_ERR);
598 writel(tmp, port_mmio + PORT_SCR_ERR);
600 /* if DRQ/BSY is set, device needs to be reset.
601 * if so, issue COMRESET
603 tmp = readl(port_mmio + PORT_TFDATA);
604 if (tmp & (ATA_BUSY | ATA_DRQ)) {
605 writel(0x301, port_mmio + PORT_SCR_CTL);
606 readl(port_mmio + PORT_SCR_CTL); /* flush */
608 writel(0x300, port_mmio + PORT_SCR_CTL);
609 readl(port_mmio + PORT_SCR_CTL); /* flush */
613 tmp = readl(port_mmio + PORT_CMD);
614 tmp |= PORT_CMD_START;
615 writel(tmp, port_mmio + PORT_CMD);
616 readl(port_mmio + PORT_CMD); /* flush */
619 static void ahci_eng_timeout(struct ata_port *ap)
621 struct ata_host_set *host_set = ap->host_set;
622 void __iomem *mmio = host_set->mmio_base;
623 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
624 struct ata_queued_cmd *qc;
627 printk(KERN_WARNING "ata%u: handling error/timeout\n", ap->id);
629 spin_lock_irqsave(&host_set->lock, flags);
631 qc = ata_qc_from_tag(ap, ap->active_tag);
633 printk(KERN_ERR "ata%u: BUG: timeout without command\n",
636 ahci_restart_port(ap, readl(port_mmio + PORT_IRQ_STAT));
638 /* hack alert! We cannot use the supplied completion
639 * function from inside the ->eh_strategy_handler() thread.
640 * libata is the only user of ->eh_strategy_handler() in
641 * any kernel, so the default scsi_done() assumes it is
642 * not being called from the SCSI EH.
644 qc->scsidone = scsi_finish_command;
645 qc->err_mask |= AC_ERR_OTHER;
649 spin_unlock_irqrestore(&host_set->lock, flags);
652 static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
654 void __iomem *mmio = ap->host_set->mmio_base;
655 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
656 u32 status, serr, ci;
658 serr = readl(port_mmio + PORT_SCR_ERR);
659 writel(serr, port_mmio + PORT_SCR_ERR);
661 status = readl(port_mmio + PORT_IRQ_STAT);
662 writel(status, port_mmio + PORT_IRQ_STAT);
664 ci = readl(port_mmio + PORT_CMD_ISSUE);
665 if (likely((ci & 0x1) == 0)) {
667 assert(qc->err_mask == 0);
673 if (status & PORT_IRQ_FATAL) {
674 unsigned int err_mask;
675 if (status & PORT_IRQ_TF_ERR)
676 err_mask = AC_ERR_DEV;
677 else if (status & PORT_IRQ_IF_ERR)
678 err_mask = AC_ERR_ATA_BUS;
680 err_mask = AC_ERR_HOST_BUS;
682 /* command processing has stopped due to error; restart */
683 ahci_restart_port(ap, status);
686 qc->err_mask |= AC_ERR_OTHER;
694 static void ahci_irq_clear(struct ata_port *ap)
699 static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
701 struct ata_host_set *host_set = dev_instance;
702 struct ahci_host_priv *hpriv;
703 unsigned int i, handled = 0;
705 u32 irq_stat, irq_ack = 0;
709 hpriv = host_set->private_data;
710 mmio = host_set->mmio_base;
712 /* sigh. 0xffffffff is a valid return from h/w */
713 irq_stat = readl(mmio + HOST_IRQ_STAT);
714 irq_stat &= hpriv->port_map;
718 spin_lock(&host_set->lock);
720 for (i = 0; i < host_set->n_ports; i++) {
723 if (!(irq_stat & (1 << i)))
726 ap = host_set->ports[i];
728 struct ata_queued_cmd *qc;
729 qc = ata_qc_from_tag(ap, ap->active_tag);
730 if (!ahci_host_intr(ap, qc))
731 if (ata_ratelimit()) {
732 struct pci_dev *pdev =
733 to_pci_dev(ap->host_set->dev);
734 dev_printk(KERN_WARNING, &pdev->dev,
735 "unhandled interrupt on port %u\n",
739 VPRINTK("port %u\n", i);
741 VPRINTK("port %u (no irq)\n", i);
742 if (ata_ratelimit()) {
743 struct pci_dev *pdev =
744 to_pci_dev(ap->host_set->dev);
745 dev_printk(KERN_WARNING, &pdev->dev,
746 "interrupt on disabled port %u\n", i);
754 writel(irq_ack, mmio + HOST_IRQ_STAT);
758 spin_unlock(&host_set->lock);
762 return IRQ_RETVAL(handled);
765 static int ahci_qc_issue(struct ata_queued_cmd *qc)
767 struct ata_port *ap = qc->ap;
768 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
770 writel(1, port_mmio + PORT_CMD_ISSUE);
771 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
776 static void ahci_setup_port(struct ata_ioports *port, unsigned long base,
777 unsigned int port_idx)
779 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
780 base = ahci_port_base_ul(base, port_idx);
781 VPRINTK("base now==0x%lx\n", base);
783 port->cmd_addr = base;
784 port->scr_addr = base + PORT_SCR;
789 static int ahci_host_init(struct ata_probe_ent *probe_ent)
791 struct ahci_host_priv *hpriv = probe_ent->private_data;
792 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
793 void __iomem *mmio = probe_ent->mmio_base;
796 unsigned int i, j, using_dac;
798 void __iomem *port_mmio;
800 cap_save = readl(mmio + HOST_CAP);
801 cap_save &= ( (1<<28) | (1<<17) );
802 cap_save |= (1 << 27);
804 /* global controller reset */
805 tmp = readl(mmio + HOST_CTL);
806 if ((tmp & HOST_RESET) == 0) {
807 writel(tmp | HOST_RESET, mmio + HOST_CTL);
808 readl(mmio + HOST_CTL); /* flush */
811 /* reset must complete within 1 second, or
812 * the hardware should be considered fried.
816 tmp = readl(mmio + HOST_CTL);
817 if (tmp & HOST_RESET) {
818 dev_printk(KERN_ERR, &pdev->dev,
819 "controller reset failed (0x%x)\n", tmp);
823 writel(HOST_AHCI_EN, mmio + HOST_CTL);
824 (void) readl(mmio + HOST_CTL); /* flush */
825 writel(cap_save, mmio + HOST_CAP);
826 writel(0xf, mmio + HOST_PORTS_IMPL);
827 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
829 pci_read_config_word(pdev, 0x92, &tmp16);
831 pci_write_config_word(pdev, 0x92, tmp16);
833 hpriv->cap = readl(mmio + HOST_CAP);
834 hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
835 probe_ent->n_ports = (hpriv->cap & 0x1f) + 1;
837 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
838 hpriv->cap, hpriv->port_map, probe_ent->n_ports);
840 using_dac = hpriv->cap & HOST_CAP_64;
842 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
843 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
845 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
847 dev_printk(KERN_ERR, &pdev->dev,
848 "64-bit DMA enable failed\n");
853 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
855 dev_printk(KERN_ERR, &pdev->dev,
856 "32-bit DMA enable failed\n");
859 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
861 dev_printk(KERN_ERR, &pdev->dev,
862 "32-bit consistent DMA enable failed\n");
867 for (i = 0; i < probe_ent->n_ports; i++) {
868 #if 0 /* BIOSen initialize this incorrectly */
869 if (!(hpriv->port_map & (1 << i)))
873 port_mmio = ahci_port_base(mmio, i);
874 VPRINTK("mmio %p port_mmio %p\n", mmio, port_mmio);
876 ahci_setup_port(&probe_ent->port[i],
877 (unsigned long) mmio, i);
879 /* make sure port is not active */
880 tmp = readl(port_mmio + PORT_CMD);
881 VPRINTK("PORT_CMD 0x%x\n", tmp);
882 if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
883 PORT_CMD_FIS_RX | PORT_CMD_START)) {
884 tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
885 PORT_CMD_FIS_RX | PORT_CMD_START);
886 writel(tmp, port_mmio + PORT_CMD);
887 readl(port_mmio + PORT_CMD); /* flush */
889 /* spec says 500 msecs for each bit, so
890 * this is slightly incorrect.
895 writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD);
900 tmp = readl(port_mmio + PORT_SCR_STAT);
901 if ((tmp & 0xf) == 0x3)
906 tmp = readl(port_mmio + PORT_SCR_ERR);
907 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
908 writel(tmp, port_mmio + PORT_SCR_ERR);
910 /* ack any pending irq events for this port */
911 tmp = readl(port_mmio + PORT_IRQ_STAT);
912 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
914 writel(tmp, port_mmio + PORT_IRQ_STAT);
916 writel(1 << i, mmio + HOST_IRQ_STAT);
918 /* set irq mask (enables interrupts) */
919 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
922 tmp = readl(mmio + HOST_CTL);
923 VPRINTK("HOST_CTL 0x%x\n", tmp);
924 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
925 tmp = readl(mmio + HOST_CTL);
926 VPRINTK("HOST_CTL 0x%x\n", tmp);
928 pci_set_master(pdev);
933 static void ahci_print_info(struct ata_probe_ent *probe_ent)
935 struct ahci_host_priv *hpriv = probe_ent->private_data;
936 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
937 void __iomem *mmio = probe_ent->mmio_base;
938 u32 vers, cap, impl, speed;
943 vers = readl(mmio + HOST_VERSION);
945 impl = hpriv->port_map;
947 speed = (cap >> 20) & 0xf;
955 pci_read_config_word(pdev, 0x0a, &cc);
958 else if (cc == 0x0106)
960 else if (cc == 0x0104)
965 dev_printk(KERN_INFO, &pdev->dev,
966 "AHCI %02x%02x.%02x%02x "
967 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
975 ((cap >> 8) & 0x1f) + 1,
981 dev_printk(KERN_INFO, &pdev->dev,
987 cap & (1 << 31) ? "64bit " : "",
988 cap & (1 << 30) ? "ncq " : "",
989 cap & (1 << 28) ? "ilck " : "",
990 cap & (1 << 27) ? "stag " : "",
991 cap & (1 << 26) ? "pm " : "",
992 cap & (1 << 25) ? "led " : "",
994 cap & (1 << 24) ? "clo " : "",
995 cap & (1 << 19) ? "nz " : "",
996 cap & (1 << 18) ? "only " : "",
997 cap & (1 << 17) ? "pmp " : "",
998 cap & (1 << 15) ? "pio " : "",
999 cap & (1 << 14) ? "slum " : "",
1000 cap & (1 << 13) ? "part " : ""
1004 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1006 static int printed_version;
1007 struct ata_probe_ent *probe_ent = NULL;
1008 struct ahci_host_priv *hpriv;
1010 void __iomem *mmio_base;
1011 unsigned int board_idx = (unsigned int) ent->driver_data;
1012 int have_msi, pci_dev_busy = 0;
1017 if (!printed_version++)
1018 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1020 rc = pci_enable_device(pdev);
1024 rc = pci_request_regions(pdev, DRV_NAME);
1030 if (pci_enable_msi(pdev) == 0)
1037 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
1038 if (probe_ent == NULL) {
1043 memset(probe_ent, 0, sizeof(*probe_ent));
1044 probe_ent->dev = pci_dev_to_dev(pdev);
1045 INIT_LIST_HEAD(&probe_ent->node);
1047 mmio_base = pci_iomap(pdev, AHCI_PCI_BAR, 0);
1048 if (mmio_base == NULL) {
1050 goto err_out_free_ent;
1052 base = (unsigned long) mmio_base;
1054 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1057 goto err_out_iounmap;
1059 memset(hpriv, 0, sizeof(*hpriv));
1061 probe_ent->sht = ahci_port_info[board_idx].sht;
1062 probe_ent->host_flags = ahci_port_info[board_idx].host_flags;
1063 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
1064 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
1065 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
1067 probe_ent->irq = pdev->irq;
1068 probe_ent->irq_flags = SA_SHIRQ;
1069 probe_ent->mmio_base = mmio_base;
1070 probe_ent->private_data = hpriv;
1073 hpriv->flags |= AHCI_FLAG_MSI;
1075 /* initialize adapter */
1076 rc = ahci_host_init(probe_ent);
1080 ahci_print_info(probe_ent);
1082 /* FIXME: check ata_device_add return value */
1083 ata_device_add(probe_ent);
1091 pci_iounmap(pdev, mmio_base);
1096 pci_disable_msi(pdev);
1099 pci_release_regions(pdev);
1102 pci_disable_device(pdev);
1106 static void ahci_remove_one (struct pci_dev *pdev)
1108 struct device *dev = pci_dev_to_dev(pdev);
1109 struct ata_host_set *host_set = dev_get_drvdata(dev);
1110 struct ahci_host_priv *hpriv = host_set->private_data;
1111 struct ata_port *ap;
1115 for (i = 0; i < host_set->n_ports; i++) {
1116 ap = host_set->ports[i];
1118 scsi_remove_host(ap->host);
1121 have_msi = hpriv->flags & AHCI_FLAG_MSI;
1122 free_irq(host_set->irq, host_set);
1124 for (i = 0; i < host_set->n_ports; i++) {
1125 ap = host_set->ports[i];
1127 ata_scsi_release(ap->host);
1128 scsi_host_put(ap->host);
1132 pci_iounmap(pdev, host_set->mmio_base);
1136 pci_disable_msi(pdev);
1139 pci_release_regions(pdev);
1140 pci_disable_device(pdev);
1141 dev_set_drvdata(dev, NULL);
1144 static int __init ahci_init(void)
1146 return pci_module_init(&ahci_pci_driver);
1149 static void __exit ahci_exit(void)
1151 pci_unregister_driver(&ahci_pci_driver);
1155 MODULE_AUTHOR("Jeff Garzik");
1156 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1157 MODULE_LICENSE("GPL");
1158 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1159 MODULE_VERSION(DRV_VERSION);
1161 module_init(ahci_init);
1162 module_exit(ahci_exit);