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 unsigned 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 { PCI_VENDOR_ID_INTEL, 0x2821, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
280 board_ahci }, /* ICH8 */
281 { PCI_VENDOR_ID_INTEL, 0x2822, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
282 board_ahci }, /* ICH8 */
283 { PCI_VENDOR_ID_INTEL, 0x2824, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
284 board_ahci }, /* ICH8 */
285 { PCI_VENDOR_ID_INTEL, 0x2829, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
286 board_ahci }, /* ICH8M */
287 { PCI_VENDOR_ID_INTEL, 0x282a, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
288 board_ahci }, /* ICH8M */
289 { } /* terminate list */
293 static struct pci_driver ahci_pci_driver = {
295 .id_table = ahci_pci_tbl,
296 .probe = ahci_init_one,
297 .remove = ahci_remove_one,
301 static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port)
303 return base + 0x100 + (port * 0x80);
306 static inline void __iomem *ahci_port_base (void __iomem *base, unsigned int port)
308 return (void __iomem *) ahci_port_base_ul((unsigned long)base, port);
311 static int ahci_port_start(struct ata_port *ap)
313 struct device *dev = ap->host_set->dev;
314 struct ahci_host_priv *hpriv = ap->host_set->private_data;
315 struct ahci_port_priv *pp;
316 void __iomem *mmio = ap->host_set->mmio_base;
317 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
322 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
325 memset(pp, 0, sizeof(*pp));
327 rc = ata_pad_alloc(ap, dev);
333 mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);
335 ata_pad_free(ap, dev);
339 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
342 * First item in chunk of DMA memory: 32-slot command table,
343 * 32 bytes each in size
346 pp->cmd_slot_dma = mem_dma;
348 mem += AHCI_CMD_SLOT_SZ;
349 mem_dma += AHCI_CMD_SLOT_SZ;
352 * Second item: Received-FIS area
355 pp->rx_fis_dma = mem_dma;
357 mem += AHCI_RX_FIS_SZ;
358 mem_dma += AHCI_RX_FIS_SZ;
361 * Third item: data area for storing a single command
362 * and its scatter-gather table
365 pp->cmd_tbl_dma = mem_dma;
367 pp->cmd_tbl_sg = mem + AHCI_CMD_TBL_HDR;
369 ap->private_data = pp;
371 if (hpriv->cap & HOST_CAP_64)
372 writel((pp->cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
373 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
374 readl(port_mmio + PORT_LST_ADDR); /* flush */
376 if (hpriv->cap & HOST_CAP_64)
377 writel((pp->rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
378 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
379 readl(port_mmio + PORT_FIS_ADDR); /* flush */
381 writel(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX |
382 PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP |
383 PORT_CMD_START, port_mmio + PORT_CMD);
384 readl(port_mmio + PORT_CMD); /* flush */
390 static void ahci_port_stop(struct ata_port *ap)
392 struct device *dev = ap->host_set->dev;
393 struct ahci_port_priv *pp = ap->private_data;
394 void __iomem *mmio = ap->host_set->mmio_base;
395 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
398 tmp = readl(port_mmio + PORT_CMD);
399 tmp &= ~(PORT_CMD_START | PORT_CMD_FIS_RX);
400 writel(tmp, port_mmio + PORT_CMD);
401 readl(port_mmio + PORT_CMD); /* flush */
403 /* spec says 500 msecs for each PORT_CMD_{START,FIS_RX} bit, so
404 * this is slightly incorrect.
408 ap->private_data = NULL;
409 dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,
410 pp->cmd_slot, pp->cmd_slot_dma);
411 ata_pad_free(ap, dev);
415 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
420 case SCR_STATUS: sc_reg = 0; break;
421 case SCR_CONTROL: sc_reg = 1; break;
422 case SCR_ERROR: sc_reg = 2; break;
423 case SCR_ACTIVE: sc_reg = 3; break;
428 return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
432 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
438 case SCR_STATUS: sc_reg = 0; break;
439 case SCR_CONTROL: sc_reg = 1; break;
440 case SCR_ERROR: sc_reg = 2; break;
441 case SCR_ACTIVE: sc_reg = 3; break;
446 writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
449 static int ahci_stop_engine(struct ata_port *ap)
451 void __iomem *mmio = ap->host_set->mmio_base;
452 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
456 tmp = readl(port_mmio + PORT_CMD);
457 tmp &= ~PORT_CMD_START;
458 writel(tmp, port_mmio + PORT_CMD);
460 /* wait for engine to stop. TODO: this could be
461 * as long as 500 msec
465 tmp = readl(port_mmio + PORT_CMD);
466 if ((tmp & PORT_CMD_LIST_ON) == 0)
474 static void ahci_start_engine(struct ata_port *ap)
476 void __iomem *mmio = ap->host_set->mmio_base;
477 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
480 tmp = readl(port_mmio + PORT_CMD);
481 tmp |= PORT_CMD_START;
482 writel(tmp, port_mmio + PORT_CMD);
483 readl(port_mmio + PORT_CMD); /* flush */
486 static unsigned int ahci_dev_classify(struct ata_port *ap)
488 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
489 struct ata_taskfile tf;
492 tmp = readl(port_mmio + PORT_SIG);
493 tf.lbah = (tmp >> 24) & 0xff;
494 tf.lbam = (tmp >> 16) & 0xff;
495 tf.lbal = (tmp >> 8) & 0xff;
496 tf.nsect = (tmp) & 0xff;
498 return ata_dev_classify(&tf);
501 static void ahci_phy_reset(struct ata_port *ap)
503 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
504 struct ata_device *dev = &ap->device[0];
507 ahci_stop_engine(ap);
508 __sata_phy_reset(ap);
509 ahci_start_engine(ap);
511 if (ap->flags & ATA_FLAG_PORT_DISABLED)
514 dev->class = ahci_dev_classify(ap);
515 if (!ata_dev_present(dev)) {
516 ata_port_disable(ap);
520 /* Make sure port's ATAPI bit is set appropriately */
521 new_tmp = tmp = readl(port_mmio + PORT_CMD);
522 if (dev->class == ATA_DEV_ATAPI)
523 new_tmp |= PORT_CMD_ATAPI;
525 new_tmp &= ~PORT_CMD_ATAPI;
526 if (new_tmp != tmp) {
527 writel(new_tmp, port_mmio + PORT_CMD);
528 readl(port_mmio + PORT_CMD); /* flush */
532 static u8 ahci_check_status(struct ata_port *ap)
534 void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr;
536 return readl(mmio + PORT_TFDATA) & 0xFF;
539 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
541 struct ahci_port_priv *pp = ap->private_data;
542 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
544 ata_tf_from_fis(d2h_fis, tf);
547 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc)
549 struct ahci_port_priv *pp = qc->ap->private_data;
550 struct scatterlist *sg;
551 struct ahci_sg *ahci_sg;
552 unsigned int n_sg = 0;
557 * Next, the S/G list.
559 ahci_sg = pp->cmd_tbl_sg;
560 ata_for_each_sg(sg, qc) {
561 dma_addr_t addr = sg_dma_address(sg);
562 u32 sg_len = sg_dma_len(sg);
564 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
565 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
566 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
575 static void ahci_qc_prep(struct ata_queued_cmd *qc)
577 struct ata_port *ap = qc->ap;
578 struct ahci_port_priv *pp = ap->private_data;
580 const u32 cmd_fis_len = 5; /* five dwords */
584 * Fill in command slot information (currently only one slot,
585 * slot 0, is currently since we don't do queueing)
589 if (qc->tf.flags & ATA_TFLAG_WRITE)
590 opts |= AHCI_CMD_WRITE;
591 if (is_atapi_taskfile(&qc->tf))
592 opts |= AHCI_CMD_ATAPI;
594 pp->cmd_slot[0].opts = cpu_to_le32(opts);
595 pp->cmd_slot[0].status = 0;
596 pp->cmd_slot[0].tbl_addr = cpu_to_le32(pp->cmd_tbl_dma & 0xffffffff);
597 pp->cmd_slot[0].tbl_addr_hi = cpu_to_le32((pp->cmd_tbl_dma >> 16) >> 16);
600 * Fill in command table information. First, the header,
601 * a SATA Register - Host to Device command FIS.
603 ata_tf_to_fis(&qc->tf, pp->cmd_tbl, 0);
604 if (opts & AHCI_CMD_ATAPI) {
605 memset(pp->cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
606 memcpy(pp->cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, ap->cdb_len);
609 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
612 n_elem = ahci_fill_sg(qc);
614 pp->cmd_slot[0].opts |= cpu_to_le32(n_elem << 16);
617 static void ahci_restart_port(struct ata_port *ap, u32 irq_stat)
619 void __iomem *mmio = ap->host_set->mmio_base;
620 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
623 if ((ap->device[0].class != ATA_DEV_ATAPI) ||
624 ((irq_stat & PORT_IRQ_TF_ERR) == 0))
625 printk(KERN_WARNING "ata%u: port reset, "
626 "p_is %x is %x pis %x cmd %x tf %x ss %x se %x\n",
629 readl(mmio + HOST_IRQ_STAT),
630 readl(port_mmio + PORT_IRQ_STAT),
631 readl(port_mmio + PORT_CMD),
632 readl(port_mmio + PORT_TFDATA),
633 readl(port_mmio + PORT_SCR_STAT),
634 readl(port_mmio + PORT_SCR_ERR));
637 ahci_stop_engine(ap);
639 /* clear SATA phy error, if any */
640 tmp = readl(port_mmio + PORT_SCR_ERR);
641 writel(tmp, port_mmio + PORT_SCR_ERR);
643 /* if DRQ/BSY is set, device needs to be reset.
644 * if so, issue COMRESET
646 tmp = readl(port_mmio + PORT_TFDATA);
647 if (tmp & (ATA_BUSY | ATA_DRQ)) {
648 writel(0x301, port_mmio + PORT_SCR_CTL);
649 readl(port_mmio + PORT_SCR_CTL); /* flush */
651 writel(0x300, port_mmio + PORT_SCR_CTL);
652 readl(port_mmio + PORT_SCR_CTL); /* flush */
656 ahci_start_engine(ap);
659 static void ahci_eng_timeout(struct ata_port *ap)
661 struct ata_host_set *host_set = ap->host_set;
662 void __iomem *mmio = host_set->mmio_base;
663 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
664 struct ata_queued_cmd *qc;
667 printk(KERN_WARNING "ata%u: handling error/timeout\n", ap->id);
669 spin_lock_irqsave(&host_set->lock, flags);
671 qc = ata_qc_from_tag(ap, ap->active_tag);
673 printk(KERN_ERR "ata%u: BUG: timeout without command\n",
676 ahci_restart_port(ap, readl(port_mmio + PORT_IRQ_STAT));
677 qc->err_mask |= AC_ERR_TIMEOUT;
680 spin_unlock_irqrestore(&host_set->lock, flags);
683 ata_eh_qc_complete(qc);
686 static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
688 void __iomem *mmio = ap->host_set->mmio_base;
689 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
690 u32 status, serr, ci;
692 serr = readl(port_mmio + PORT_SCR_ERR);
693 writel(serr, port_mmio + PORT_SCR_ERR);
695 status = readl(port_mmio + PORT_IRQ_STAT);
696 writel(status, port_mmio + PORT_IRQ_STAT);
698 ci = readl(port_mmio + PORT_CMD_ISSUE);
699 if (likely((ci & 0x1) == 0)) {
701 assert(qc->err_mask == 0);
707 if (status & PORT_IRQ_FATAL) {
708 unsigned int err_mask;
709 if (status & PORT_IRQ_TF_ERR)
710 err_mask = AC_ERR_DEV;
711 else if (status & PORT_IRQ_IF_ERR)
712 err_mask = AC_ERR_ATA_BUS;
714 err_mask = AC_ERR_HOST_BUS;
716 /* command processing has stopped due to error; restart */
717 ahci_restart_port(ap, status);
720 qc->err_mask |= err_mask;
728 static void ahci_irq_clear(struct ata_port *ap)
733 static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
735 struct ata_host_set *host_set = dev_instance;
736 struct ahci_host_priv *hpriv;
737 unsigned int i, handled = 0;
739 u32 irq_stat, irq_ack = 0;
743 hpriv = host_set->private_data;
744 mmio = host_set->mmio_base;
746 /* sigh. 0xffffffff is a valid return from h/w */
747 irq_stat = readl(mmio + HOST_IRQ_STAT);
748 irq_stat &= hpriv->port_map;
752 spin_lock(&host_set->lock);
754 for (i = 0; i < host_set->n_ports; i++) {
757 if (!(irq_stat & (1 << i)))
760 ap = host_set->ports[i];
762 struct ata_queued_cmd *qc;
763 qc = ata_qc_from_tag(ap, ap->active_tag);
764 if (!ahci_host_intr(ap, qc))
765 if (ata_ratelimit()) {
766 struct pci_dev *pdev =
767 to_pci_dev(ap->host_set->dev);
768 dev_printk(KERN_WARNING, &pdev->dev,
769 "unhandled interrupt on port %u\n",
773 VPRINTK("port %u\n", i);
775 VPRINTK("port %u (no irq)\n", i);
776 if (ata_ratelimit()) {
777 struct pci_dev *pdev =
778 to_pci_dev(ap->host_set->dev);
779 dev_printk(KERN_WARNING, &pdev->dev,
780 "interrupt on disabled port %u\n", i);
788 writel(irq_ack, mmio + HOST_IRQ_STAT);
792 spin_unlock(&host_set->lock);
796 return IRQ_RETVAL(handled);
799 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
801 struct ata_port *ap = qc->ap;
802 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
804 writel(1, port_mmio + PORT_CMD_ISSUE);
805 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
810 static void ahci_setup_port(struct ata_ioports *port, unsigned long base,
811 unsigned int port_idx)
813 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
814 base = ahci_port_base_ul(base, port_idx);
815 VPRINTK("base now==0x%lx\n", base);
817 port->cmd_addr = base;
818 port->scr_addr = base + PORT_SCR;
823 static int ahci_host_init(struct ata_probe_ent *probe_ent)
825 struct ahci_host_priv *hpriv = probe_ent->private_data;
826 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
827 void __iomem *mmio = probe_ent->mmio_base;
830 unsigned int i, j, using_dac;
832 void __iomem *port_mmio;
834 cap_save = readl(mmio + HOST_CAP);
835 cap_save &= ( (1<<28) | (1<<17) );
836 cap_save |= (1 << 27);
838 /* global controller reset */
839 tmp = readl(mmio + HOST_CTL);
840 if ((tmp & HOST_RESET) == 0) {
841 writel(tmp | HOST_RESET, mmio + HOST_CTL);
842 readl(mmio + HOST_CTL); /* flush */
845 /* reset must complete within 1 second, or
846 * the hardware should be considered fried.
850 tmp = readl(mmio + HOST_CTL);
851 if (tmp & HOST_RESET) {
852 dev_printk(KERN_ERR, &pdev->dev,
853 "controller reset failed (0x%x)\n", tmp);
857 writel(HOST_AHCI_EN, mmio + HOST_CTL);
858 (void) readl(mmio + HOST_CTL); /* flush */
859 writel(cap_save, mmio + HOST_CAP);
860 writel(0xf, mmio + HOST_PORTS_IMPL);
861 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
863 pci_read_config_word(pdev, 0x92, &tmp16);
865 pci_write_config_word(pdev, 0x92, tmp16);
867 hpriv->cap = readl(mmio + HOST_CAP);
868 hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
869 probe_ent->n_ports = (hpriv->cap & 0x1f) + 1;
871 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
872 hpriv->cap, hpriv->port_map, probe_ent->n_ports);
874 using_dac = hpriv->cap & HOST_CAP_64;
876 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
877 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
879 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
881 dev_printk(KERN_ERR, &pdev->dev,
882 "64-bit DMA enable failed\n");
887 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
889 dev_printk(KERN_ERR, &pdev->dev,
890 "32-bit DMA enable failed\n");
893 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
895 dev_printk(KERN_ERR, &pdev->dev,
896 "32-bit consistent DMA enable failed\n");
901 for (i = 0; i < probe_ent->n_ports; i++) {
902 #if 0 /* BIOSen initialize this incorrectly */
903 if (!(hpriv->port_map & (1 << i)))
907 port_mmio = ahci_port_base(mmio, i);
908 VPRINTK("mmio %p port_mmio %p\n", mmio, port_mmio);
910 ahci_setup_port(&probe_ent->port[i],
911 (unsigned long) mmio, i);
913 /* make sure port is not active */
914 tmp = readl(port_mmio + PORT_CMD);
915 VPRINTK("PORT_CMD 0x%x\n", tmp);
916 if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
917 PORT_CMD_FIS_RX | PORT_CMD_START)) {
918 tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
919 PORT_CMD_FIS_RX | PORT_CMD_START);
920 writel(tmp, port_mmio + PORT_CMD);
921 readl(port_mmio + PORT_CMD); /* flush */
923 /* spec says 500 msecs for each bit, so
924 * this is slightly incorrect.
929 writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD);
934 tmp = readl(port_mmio + PORT_SCR_STAT);
935 if ((tmp & 0xf) == 0x3)
940 tmp = readl(port_mmio + PORT_SCR_ERR);
941 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
942 writel(tmp, port_mmio + PORT_SCR_ERR);
944 /* ack any pending irq events for this port */
945 tmp = readl(port_mmio + PORT_IRQ_STAT);
946 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
948 writel(tmp, port_mmio + PORT_IRQ_STAT);
950 writel(1 << i, mmio + HOST_IRQ_STAT);
952 /* set irq mask (enables interrupts) */
953 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
956 tmp = readl(mmio + HOST_CTL);
957 VPRINTK("HOST_CTL 0x%x\n", tmp);
958 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
959 tmp = readl(mmio + HOST_CTL);
960 VPRINTK("HOST_CTL 0x%x\n", tmp);
962 pci_set_master(pdev);
967 static void ahci_print_info(struct ata_probe_ent *probe_ent)
969 struct ahci_host_priv *hpriv = probe_ent->private_data;
970 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
971 void __iomem *mmio = probe_ent->mmio_base;
972 u32 vers, cap, impl, speed;
977 vers = readl(mmio + HOST_VERSION);
979 impl = hpriv->port_map;
981 speed = (cap >> 20) & 0xf;
989 pci_read_config_word(pdev, 0x0a, &cc);
992 else if (cc == 0x0106)
994 else if (cc == 0x0104)
999 dev_printk(KERN_INFO, &pdev->dev,
1000 "AHCI %02x%02x.%02x%02x "
1001 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1004 (vers >> 24) & 0xff,
1005 (vers >> 16) & 0xff,
1009 ((cap >> 8) & 0x1f) + 1,
1015 dev_printk(KERN_INFO, &pdev->dev,
1021 cap & (1 << 31) ? "64bit " : "",
1022 cap & (1 << 30) ? "ncq " : "",
1023 cap & (1 << 28) ? "ilck " : "",
1024 cap & (1 << 27) ? "stag " : "",
1025 cap & (1 << 26) ? "pm " : "",
1026 cap & (1 << 25) ? "led " : "",
1028 cap & (1 << 24) ? "clo " : "",
1029 cap & (1 << 19) ? "nz " : "",
1030 cap & (1 << 18) ? "only " : "",
1031 cap & (1 << 17) ? "pmp " : "",
1032 cap & (1 << 15) ? "pio " : "",
1033 cap & (1 << 14) ? "slum " : "",
1034 cap & (1 << 13) ? "part " : ""
1038 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1040 static int printed_version;
1041 struct ata_probe_ent *probe_ent = NULL;
1042 struct ahci_host_priv *hpriv;
1044 void __iomem *mmio_base;
1045 unsigned int board_idx = (unsigned int) ent->driver_data;
1046 int have_msi, pci_dev_busy = 0;
1051 if (!printed_version++)
1052 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1054 rc = pci_enable_device(pdev);
1058 rc = pci_request_regions(pdev, DRV_NAME);
1064 if (pci_enable_msi(pdev) == 0)
1071 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
1072 if (probe_ent == NULL) {
1077 memset(probe_ent, 0, sizeof(*probe_ent));
1078 probe_ent->dev = pci_dev_to_dev(pdev);
1079 INIT_LIST_HEAD(&probe_ent->node);
1081 mmio_base = pci_iomap(pdev, AHCI_PCI_BAR, 0);
1082 if (mmio_base == NULL) {
1084 goto err_out_free_ent;
1086 base = (unsigned long) mmio_base;
1088 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1091 goto err_out_iounmap;
1093 memset(hpriv, 0, sizeof(*hpriv));
1095 probe_ent->sht = ahci_port_info[board_idx].sht;
1096 probe_ent->host_flags = ahci_port_info[board_idx].host_flags;
1097 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
1098 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
1099 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
1101 probe_ent->irq = pdev->irq;
1102 probe_ent->irq_flags = SA_SHIRQ;
1103 probe_ent->mmio_base = mmio_base;
1104 probe_ent->private_data = hpriv;
1107 hpriv->flags |= AHCI_FLAG_MSI;
1109 /* initialize adapter */
1110 rc = ahci_host_init(probe_ent);
1114 ahci_print_info(probe_ent);
1116 /* FIXME: check ata_device_add return value */
1117 ata_device_add(probe_ent);
1125 pci_iounmap(pdev, mmio_base);
1130 pci_disable_msi(pdev);
1133 pci_release_regions(pdev);
1136 pci_disable_device(pdev);
1140 static void ahci_remove_one (struct pci_dev *pdev)
1142 struct device *dev = pci_dev_to_dev(pdev);
1143 struct ata_host_set *host_set = dev_get_drvdata(dev);
1144 struct ahci_host_priv *hpriv = host_set->private_data;
1145 struct ata_port *ap;
1149 for (i = 0; i < host_set->n_ports; i++) {
1150 ap = host_set->ports[i];
1152 scsi_remove_host(ap->host);
1155 have_msi = hpriv->flags & AHCI_FLAG_MSI;
1156 free_irq(host_set->irq, host_set);
1158 for (i = 0; i < host_set->n_ports; i++) {
1159 ap = host_set->ports[i];
1161 ata_scsi_release(ap->host);
1162 scsi_host_put(ap->host);
1166 pci_iounmap(pdev, host_set->mmio_base);
1170 pci_disable_msi(pdev);
1173 pci_release_regions(pdev);
1174 pci_disable_device(pdev);
1175 dev_set_drvdata(dev, NULL);
1178 static int __init ahci_init(void)
1180 return pci_module_init(&ahci_pci_driver);
1183 static void __exit ahci_exit(void)
1185 pci_unregister_driver(&ahci_pci_driver);
1189 MODULE_AUTHOR("Jeff Garzik");
1190 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1191 MODULE_LICENSE("GPL");
1192 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1193 MODULE_VERSION(DRV_VERSION);
1195 module_init(ahci_init);
1196 module_exit(ahci_exit);