2 * ahci.c - AHCI SATA support
4 * Copyright 2004 Red Hat, Inc.
6 * The contents of this file are subject to the Open
7 * Software License version 1.1 that can be found at
8 * http://www.opensource.org/licenses/osl-1.1.txt and is included herein
11 * Alternatively, the contents of this file may be used under the terms
12 * of the GNU General Public License version 2 (the "GPL") as distributed
13 * in the kernel source COPYING file, in which case the provisions of
14 * the GPL are applicable instead of the above. If you wish to allow
15 * the use of your version of this file only under the terms of the
16 * GPL and not to allow others to use your version of this file under
17 * the OSL, indicate your decision by deleting the provisions above and
18 * replace them with the notice and other provisions required by the GPL.
19 * If you do not delete the provisions above, a recipient may use your
20 * version of this file under either the OSL or the GPL.
22 * Version 1.0 of the AHCI specification:
23 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/pci.h>
30 #include <linux/init.h>
31 #include <linux/blkdev.h>
32 #include <linux/delay.h>
33 #include <linux/interrupt.h>
34 #include <linux/sched.h>
35 #include <linux/dma-mapping.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/libata.h>
41 #define DRV_NAME "ahci"
42 #define DRV_VERSION "1.01"
47 AHCI_MAX_SG = 168, /* hardware max is 64K */
48 AHCI_DMA_BOUNDARY = 0xffffffff,
49 AHCI_USE_CLUSTERING = 0,
50 AHCI_CMD_SLOT_SZ = 32 * 32,
52 AHCI_CMD_TBL_HDR = 0x80,
53 AHCI_CMD_TBL_CDB = 0x40,
54 AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR + (AHCI_MAX_SG * 16),
55 AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ +
57 AHCI_IRQ_ON_SG = (1 << 31),
58 AHCI_CMD_ATAPI = (1 << 5),
59 AHCI_CMD_WRITE = (1 << 6),
61 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
65 /* global controller registers */
66 HOST_CAP = 0x00, /* host capabilities */
67 HOST_CTL = 0x04, /* global host control */
68 HOST_IRQ_STAT = 0x08, /* interrupt status */
69 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
70 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
73 HOST_RESET = (1 << 0), /* reset controller; self-clear */
74 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
75 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
78 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
80 /* registers for each SATA port */
81 PORT_LST_ADDR = 0x00, /* command list DMA addr */
82 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
83 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
84 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
85 PORT_IRQ_STAT = 0x10, /* interrupt status */
86 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
87 PORT_CMD = 0x18, /* port command */
88 PORT_TFDATA = 0x20, /* taskfile data */
89 PORT_SIG = 0x24, /* device TF signature */
90 PORT_CMD_ISSUE = 0x38, /* command issue */
91 PORT_SCR = 0x28, /* SATA phy register block */
92 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
93 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
94 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
95 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
97 /* PORT_IRQ_{STAT,MASK} bits */
98 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
99 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
100 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
101 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
102 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
103 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
104 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
105 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
107 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
108 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
109 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
110 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
111 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
112 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
113 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
114 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
115 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
117 PORT_IRQ_FATAL = PORT_IRQ_TF_ERR |
119 PORT_IRQ_HBUS_DATA_ERR |
121 DEF_PORT_IRQ = PORT_IRQ_FATAL | PORT_IRQ_PHYRDY |
122 PORT_IRQ_CONNECT | PORT_IRQ_SG_DONE |
123 PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_FIS |
124 PORT_IRQ_DMAS_FIS | PORT_IRQ_PIOS_FIS |
125 PORT_IRQ_D2H_REG_FIS,
128 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
129 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
130 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
131 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
132 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
133 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
135 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
136 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
137 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
139 /* hpriv->flags bits */
140 AHCI_FLAG_MSI = (1 << 0),
143 struct ahci_cmd_hdr {
158 struct ahci_host_priv {
160 u32 cap; /* cache of HOST_CAP register */
161 u32 port_map; /* cache of HOST_PORTS_IMPL reg */
164 struct ahci_port_priv {
165 struct ahci_cmd_hdr *cmd_slot;
166 dma_addr_t cmd_slot_dma;
168 dma_addr_t cmd_tbl_dma;
169 struct ahci_sg *cmd_tbl_sg;
171 dma_addr_t rx_fis_dma;
174 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
175 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
176 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
177 static int ahci_qc_issue(struct ata_queued_cmd *qc);
178 static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
179 static void ahci_phy_reset(struct ata_port *ap);
180 static void ahci_irq_clear(struct ata_port *ap);
181 static void ahci_eng_timeout(struct ata_port *ap);
182 static int ahci_port_start(struct ata_port *ap);
183 static void ahci_port_stop(struct ata_port *ap);
184 static void ahci_host_stop(struct ata_host_set *host_set);
185 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
186 static void ahci_qc_prep(struct ata_queued_cmd *qc);
187 static u8 ahci_check_status(struct ata_port *ap);
188 static u8 ahci_check_err(struct ata_port *ap);
189 static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
190 static void ahci_remove_one (struct pci_dev *pdev);
192 static Scsi_Host_Template ahci_sht = {
193 .module = THIS_MODULE,
195 .ioctl = ata_scsi_ioctl,
196 .queuecommand = ata_scsi_queuecmd,
197 .eh_strategy_handler = ata_scsi_error,
198 .can_queue = ATA_DEF_QUEUE,
199 .this_id = ATA_SHT_THIS_ID,
200 .sg_tablesize = AHCI_MAX_SG,
201 .max_sectors = ATA_MAX_SECTORS,
202 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
203 .emulated = ATA_SHT_EMULATED,
204 .use_clustering = AHCI_USE_CLUSTERING,
205 .proc_name = DRV_NAME,
206 .dma_boundary = AHCI_DMA_BOUNDARY,
207 .slave_configure = ata_scsi_slave_config,
208 .bios_param = ata_std_bios_param,
212 static struct ata_port_operations ahci_ops = {
213 .port_disable = ata_port_disable,
215 .check_status = ahci_check_status,
216 .check_altstatus = ahci_check_status,
217 .check_err = ahci_check_err,
218 .dev_select = ata_noop_dev_select,
220 .tf_read = ahci_tf_read,
222 .phy_reset = ahci_phy_reset,
224 .qc_prep = ahci_qc_prep,
225 .qc_issue = ahci_qc_issue,
227 .eng_timeout = ahci_eng_timeout,
229 .irq_handler = ahci_interrupt,
230 .irq_clear = ahci_irq_clear,
232 .scr_read = ahci_scr_read,
233 .scr_write = ahci_scr_write,
235 .port_start = ahci_port_start,
236 .port_stop = ahci_port_stop,
237 .host_stop = ahci_host_stop,
240 static struct ata_port_info ahci_port_info[] = {
244 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
245 ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
247 .pio_mask = 0x03, /* pio3-4 */
248 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
249 .port_ops = &ahci_ops,
253 static struct pci_device_id ahci_pci_tbl[] = {
254 { PCI_VENDOR_ID_INTEL, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
255 board_ahci }, /* ICH6 */
256 { PCI_VENDOR_ID_INTEL, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
257 board_ahci }, /* ICH6M */
258 { PCI_VENDOR_ID_INTEL, 0x27c1, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
259 board_ahci }, /* ICH7 */
260 { PCI_VENDOR_ID_INTEL, 0x27c5, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
261 board_ahci }, /* ICH7M */
262 { PCI_VENDOR_ID_INTEL, 0x27c3, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
263 board_ahci }, /* ICH7R */
264 { PCI_VENDOR_ID_AL, 0x5288, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
265 board_ahci }, /* ULi M5288 */
266 { PCI_VENDOR_ID_INTEL, 0x2681, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
267 board_ahci }, /* ESB2 */
268 { PCI_VENDOR_ID_INTEL, 0x2682, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
269 board_ahci }, /* ESB2 */
270 { PCI_VENDOR_ID_INTEL, 0x2683, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
271 board_ahci }, /* ESB2 */
272 { } /* terminate list */
276 static struct pci_driver ahci_pci_driver = {
278 .id_table = ahci_pci_tbl,
279 .probe = ahci_init_one,
280 .remove = ahci_remove_one,
284 static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port)
286 return base + 0x100 + (port * 0x80);
289 static inline void *ahci_port_base (void *base, unsigned int port)
291 return (void *) ahci_port_base_ul((unsigned long)base, port);
294 static void ahci_host_stop(struct ata_host_set *host_set)
296 struct ahci_host_priv *hpriv = host_set->private_data;
299 ata_host_stop(host_set);
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;
308 void *mem, *mmio = ap->host_set->mmio_base;
309 void *port_mmio = ahci_port_base(mmio, ap->port_no);
312 rc = ata_port_start(ap);
316 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
321 memset(pp, 0, sizeof(*pp));
323 mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);
328 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
331 * First item in chunk of DMA memory: 32-slot command table,
332 * 32 bytes each in size
335 pp->cmd_slot_dma = mem_dma;
337 mem += AHCI_CMD_SLOT_SZ;
338 mem_dma += AHCI_CMD_SLOT_SZ;
341 * Second item: Received-FIS area
344 pp->rx_fis_dma = mem_dma;
346 mem += AHCI_RX_FIS_SZ;
347 mem_dma += AHCI_RX_FIS_SZ;
350 * Third item: data area for storing a single command
351 * and its scatter-gather table
354 pp->cmd_tbl_dma = mem_dma;
356 pp->cmd_tbl_sg = mem + AHCI_CMD_TBL_HDR;
358 ap->private_data = pp;
360 if (hpriv->cap & HOST_CAP_64)
361 writel((pp->cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
362 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
363 readl(port_mmio + PORT_LST_ADDR); /* flush */
365 if (hpriv->cap & HOST_CAP_64)
366 writel((pp->rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
367 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
368 readl(port_mmio + PORT_FIS_ADDR); /* flush */
370 writel(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX |
371 PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP |
372 PORT_CMD_START, port_mmio + PORT_CMD);
373 readl(port_mmio + PORT_CMD); /* flush */
385 static void ahci_port_stop(struct ata_port *ap)
387 struct device *dev = ap->host_set->dev;
388 struct ahci_port_priv *pp = ap->private_data;
389 void *mmio = ap->host_set->mmio_base;
390 void *port_mmio = ahci_port_base(mmio, ap->port_no);
393 tmp = readl(port_mmio + PORT_CMD);
394 tmp &= ~(PORT_CMD_START | PORT_CMD_FIS_RX);
395 writel(tmp, port_mmio + PORT_CMD);
396 readl(port_mmio + PORT_CMD); /* flush */
398 /* spec says 500 msecs for each PORT_CMD_{START,FIS_RX} bit, so
399 * this is slightly incorrect.
403 ap->private_data = NULL;
404 dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,
405 pp->cmd_slot, pp->cmd_slot_dma);
410 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
415 case SCR_STATUS: sc_reg = 0; break;
416 case SCR_CONTROL: sc_reg = 1; break;
417 case SCR_ERROR: sc_reg = 2; break;
418 case SCR_ACTIVE: sc_reg = 3; break;
423 return readl((void *) ap->ioaddr.scr_addr + (sc_reg * 4));
427 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
433 case SCR_STATUS: sc_reg = 0; break;
434 case SCR_CONTROL: sc_reg = 1; break;
435 case SCR_ERROR: sc_reg = 2; break;
436 case SCR_ACTIVE: sc_reg = 3; break;
441 writel(val, (void *) ap->ioaddr.scr_addr + (sc_reg * 4));
444 static void ahci_phy_reset(struct ata_port *ap)
446 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
447 struct ata_taskfile tf;
448 struct ata_device *dev = &ap->device[0];
451 __sata_phy_reset(ap);
453 if (ap->flags & ATA_FLAG_PORT_DISABLED)
456 tmp = readl(port_mmio + PORT_SIG);
457 tf.lbah = (tmp >> 24) & 0xff;
458 tf.lbam = (tmp >> 16) & 0xff;
459 tf.lbal = (tmp >> 8) & 0xff;
460 tf.nsect = (tmp) & 0xff;
462 dev->class = ata_dev_classify(&tf);
463 if (!ata_dev_present(dev))
464 ata_port_disable(ap);
467 static u8 ahci_check_status(struct ata_port *ap)
469 void *mmio = (void *) ap->ioaddr.cmd_addr;
471 return readl(mmio + PORT_TFDATA) & 0xFF;
474 static u8 ahci_check_err(struct ata_port *ap)
476 void *mmio = (void *) ap->ioaddr.cmd_addr;
478 return (readl(mmio + PORT_TFDATA) >> 8) & 0xFF;
481 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
483 struct ahci_port_priv *pp = ap->private_data;
484 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
486 ata_tf_from_fis(d2h_fis, tf);
489 static void ahci_fill_sg(struct ata_queued_cmd *qc)
491 struct ahci_port_priv *pp = qc->ap->private_data;
497 * Next, the S/G list.
499 for (i = 0; i < qc->n_elem; i++) {
503 addr = sg_dma_address(&qc->sg[i]);
504 sg_len = sg_dma_len(&qc->sg[i]);
506 pp->cmd_tbl_sg[i].addr = cpu_to_le32(addr & 0xffffffff);
507 pp->cmd_tbl_sg[i].addr_hi = cpu_to_le32((addr >> 16) >> 16);
508 pp->cmd_tbl_sg[i].flags_size = cpu_to_le32(sg_len - 1);
512 static void ahci_qc_prep(struct ata_queued_cmd *qc)
514 struct ata_port *ap = qc->ap;
515 struct ahci_port_priv *pp = ap->private_data;
517 const u32 cmd_fis_len = 5; /* five dwords */
520 * Fill in command slot information (currently only one slot,
521 * slot 0, is currently since we don't do queueing)
524 opts = (qc->n_elem << 16) | cmd_fis_len;
525 if (qc->tf.flags & ATA_TFLAG_WRITE)
526 opts |= AHCI_CMD_WRITE;
527 if (is_atapi_taskfile(&qc->tf))
528 opts |= AHCI_CMD_ATAPI;
530 pp->cmd_slot[0].opts = cpu_to_le32(opts);
531 pp->cmd_slot[0].status = 0;
532 pp->cmd_slot[0].tbl_addr = cpu_to_le32(pp->cmd_tbl_dma & 0xffffffff);
533 pp->cmd_slot[0].tbl_addr_hi = cpu_to_le32((pp->cmd_tbl_dma >> 16) >> 16);
536 * Fill in command table information. First, the header,
537 * a SATA Register - Host to Device command FIS.
539 ata_tf_to_fis(&qc->tf, pp->cmd_tbl, 0);
540 if (opts & AHCI_CMD_ATAPI) {
541 memset(pp->cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
542 memcpy(pp->cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, ap->cdb_len);
545 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
551 static void ahci_intr_error(struct ata_port *ap, u32 irq_stat)
553 void *mmio = ap->host_set->mmio_base;
554 void *port_mmio = ahci_port_base(mmio, ap->port_no);
559 tmp = readl(port_mmio + PORT_CMD);
560 tmp &= ~PORT_CMD_START;
561 writel(tmp, port_mmio + PORT_CMD);
563 /* wait for engine to stop. TODO: this could be
564 * as long as 500 msec
568 tmp = readl(port_mmio + PORT_CMD);
569 if ((tmp & PORT_CMD_LIST_ON) == 0)
574 /* clear SATA phy error, if any */
575 tmp = readl(port_mmio + PORT_SCR_ERR);
576 writel(tmp, port_mmio + PORT_SCR_ERR);
578 /* if DRQ/BSY is set, device needs to be reset.
579 * if so, issue COMRESET
581 tmp = readl(port_mmio + PORT_TFDATA);
582 if (tmp & (ATA_BUSY | ATA_DRQ)) {
583 writel(0x301, port_mmio + PORT_SCR_CTL);
584 readl(port_mmio + PORT_SCR_CTL); /* flush */
586 writel(0x300, port_mmio + PORT_SCR_CTL);
587 readl(port_mmio + PORT_SCR_CTL); /* flush */
591 tmp = readl(port_mmio + PORT_CMD);
592 tmp |= PORT_CMD_START;
593 writel(tmp, port_mmio + PORT_CMD);
594 readl(port_mmio + PORT_CMD); /* flush */
596 printk(KERN_WARNING "ata%u: error occurred, port reset\n", ap->id);
599 static void ahci_eng_timeout(struct ata_port *ap)
601 void *mmio = ap->host_set->mmio_base;
602 void *port_mmio = ahci_port_base(mmio, ap->port_no);
603 struct ata_queued_cmd *qc;
607 ahci_intr_error(ap, readl(port_mmio + PORT_IRQ_STAT));
609 qc = ata_qc_from_tag(ap, ap->active_tag);
611 printk(KERN_ERR "ata%u: BUG: timeout without command\n",
614 /* hack alert! We cannot use the supplied completion
615 * function from inside the ->eh_strategy_handler() thread.
616 * libata is the only user of ->eh_strategy_handler() in
617 * any kernel, so the default scsi_done() assumes it is
618 * not being called from the SCSI EH.
620 qc->scsidone = scsi_finish_command;
621 ata_qc_complete(qc, ATA_ERR);
626 static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
628 void *mmio = ap->host_set->mmio_base;
629 void *port_mmio = ahci_port_base(mmio, ap->port_no);
630 u32 status, serr, ci;
632 serr = readl(port_mmio + PORT_SCR_ERR);
633 writel(serr, port_mmio + PORT_SCR_ERR);
635 status = readl(port_mmio + PORT_IRQ_STAT);
636 writel(status, port_mmio + PORT_IRQ_STAT);
638 ci = readl(port_mmio + PORT_CMD_ISSUE);
639 if (likely((ci & 0x1) == 0)) {
641 ata_qc_complete(qc, 0);
646 if (status & PORT_IRQ_FATAL) {
647 ahci_intr_error(ap, status);
649 ata_qc_complete(qc, ATA_ERR);
655 static void ahci_irq_clear(struct ata_port *ap)
660 static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
662 struct ata_host_set *host_set = dev_instance;
663 struct ahci_host_priv *hpriv;
664 unsigned int i, handled = 0;
666 u32 irq_stat, irq_ack = 0;
670 hpriv = host_set->private_data;
671 mmio = host_set->mmio_base;
673 /* sigh. 0xffffffff is a valid return from h/w */
674 irq_stat = readl(mmio + HOST_IRQ_STAT);
675 irq_stat &= hpriv->port_map;
679 spin_lock(&host_set->lock);
681 for (i = 0; i < host_set->n_ports; i++) {
685 VPRINTK("port %u\n", i);
686 ap = host_set->ports[i];
687 tmp = irq_stat & (1 << i);
689 struct ata_queued_cmd *qc;
690 qc = ata_qc_from_tag(ap, ap->active_tag);
691 if (ahci_host_intr(ap, qc))
697 writel(irq_ack, mmio + HOST_IRQ_STAT);
701 spin_unlock(&host_set->lock);
705 return IRQ_RETVAL(handled);
708 static int ahci_qc_issue(struct ata_queued_cmd *qc)
710 struct ata_port *ap = qc->ap;
711 void *port_mmio = (void *) ap->ioaddr.cmd_addr;
713 writel(1, port_mmio + PORT_SCR_ACT);
714 readl(port_mmio + PORT_SCR_ACT); /* flush */
716 writel(1, port_mmio + PORT_CMD_ISSUE);
717 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
722 static void ahci_setup_port(struct ata_ioports *port, unsigned long base,
723 unsigned int port_idx)
725 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
726 base = ahci_port_base_ul(base, port_idx);
727 VPRINTK("base now==0x%lx\n", base);
729 port->cmd_addr = base;
730 port->scr_addr = base + PORT_SCR;
735 static int ahci_host_init(struct ata_probe_ent *probe_ent)
737 struct ahci_host_priv *hpriv = probe_ent->private_data;
738 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
739 void __iomem *mmio = probe_ent->mmio_base;
742 unsigned int i, j, using_dac;
744 void __iomem *port_mmio;
746 cap_save = readl(mmio + HOST_CAP);
747 cap_save &= ( (1<<28) | (1<<17) );
748 cap_save |= (1 << 27);
750 /* global controller reset */
751 tmp = readl(mmio + HOST_CTL);
752 if ((tmp & HOST_RESET) == 0) {
753 writel(tmp | HOST_RESET, mmio + HOST_CTL);
754 readl(mmio + HOST_CTL); /* flush */
757 /* reset must complete within 1 second, or
758 * the hardware should be considered fried.
762 tmp = readl(mmio + HOST_CTL);
763 if (tmp & HOST_RESET) {
764 printk(KERN_ERR DRV_NAME "(%s): controller reset failed (0x%x)\n",
765 pci_name(pdev), tmp);
769 writel(HOST_AHCI_EN, mmio + HOST_CTL);
770 (void) readl(mmio + HOST_CTL); /* flush */
771 writel(cap_save, mmio + HOST_CAP);
772 writel(0xf, mmio + HOST_PORTS_IMPL);
773 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
775 pci_read_config_word(pdev, 0x92, &tmp16);
777 pci_write_config_word(pdev, 0x92, tmp16);
779 hpriv->cap = readl(mmio + HOST_CAP);
780 hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
781 probe_ent->n_ports = (hpriv->cap & 0x1f) + 1;
783 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
784 hpriv->cap, hpriv->port_map, probe_ent->n_ports);
786 using_dac = hpriv->cap & HOST_CAP_64;
788 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
789 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
791 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
793 printk(KERN_ERR DRV_NAME "(%s): 64-bit DMA enable failed\n",
799 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
801 printk(KERN_ERR DRV_NAME "(%s): 32-bit DMA enable failed\n",
805 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
807 printk(KERN_ERR DRV_NAME "(%s): 32-bit consistent DMA enable failed\n",
813 for (i = 0; i < probe_ent->n_ports; i++) {
814 #if 0 /* BIOSen initialize this incorrectly */
815 if (!(hpriv->port_map & (1 << i)))
819 port_mmio = ahci_port_base(mmio, i);
820 VPRINTK("mmio %p port_mmio %p\n", mmio, port_mmio);
822 ahci_setup_port(&probe_ent->port[i],
823 (unsigned long) mmio, i);
825 /* make sure port is not active */
826 tmp = readl(port_mmio + PORT_CMD);
827 VPRINTK("PORT_CMD 0x%x\n", tmp);
828 if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
829 PORT_CMD_FIS_RX | PORT_CMD_START)) {
830 tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
831 PORT_CMD_FIS_RX | PORT_CMD_START);
832 writel(tmp, port_mmio + PORT_CMD);
833 readl(port_mmio + PORT_CMD); /* flush */
835 /* spec says 500 msecs for each bit, so
836 * this is slightly incorrect.
841 writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD);
846 tmp = readl(port_mmio + PORT_SCR_STAT);
847 if ((tmp & 0xf) == 0x3)
852 tmp = readl(port_mmio + PORT_SCR_ERR);
853 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
854 writel(tmp, port_mmio + PORT_SCR_ERR);
856 /* ack any pending irq events for this port */
857 tmp = readl(port_mmio + PORT_IRQ_STAT);
858 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
860 writel(tmp, port_mmio + PORT_IRQ_STAT);
862 writel(1 << i, mmio + HOST_IRQ_STAT);
864 /* set irq mask (enables interrupts) */
865 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
868 tmp = readl(mmio + HOST_CTL);
869 VPRINTK("HOST_CTL 0x%x\n", tmp);
870 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
871 tmp = readl(mmio + HOST_CTL);
872 VPRINTK("HOST_CTL 0x%x\n", tmp);
874 pci_set_master(pdev);
879 /* move to PCI layer, integrate w/ MSI stuff */
880 static void pci_intx(struct pci_dev *pdev, int enable)
882 u16 pci_command, new;
884 pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
887 new = pci_command & ~PCI_COMMAND_INTX_DISABLE;
889 new = pci_command | PCI_COMMAND_INTX_DISABLE;
891 if (new != pci_command)
892 pci_write_config_word(pdev, PCI_COMMAND, pci_command);
895 static void ahci_print_info(struct ata_probe_ent *probe_ent)
897 struct ahci_host_priv *hpriv = probe_ent->private_data;
898 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
899 void *mmio = probe_ent->mmio_base;
900 u32 vers, cap, impl, speed;
905 vers = readl(mmio + HOST_VERSION);
907 impl = hpriv->port_map;
909 speed = (cap >> 20) & 0xf;
917 pci_read_config_word(pdev, 0x0a, &cc);
920 else if (cc == 0x0106)
922 else if (cc == 0x0104)
927 printk(KERN_INFO DRV_NAME "(%s) AHCI %02x%02x.%02x%02x "
928 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
937 ((cap >> 8) & 0x1f) + 1,
943 printk(KERN_INFO DRV_NAME "(%s) flags: "
949 cap & (1 << 31) ? "64bit " : "",
950 cap & (1 << 30) ? "ncq " : "",
951 cap & (1 << 28) ? "ilck " : "",
952 cap & (1 << 27) ? "stag " : "",
953 cap & (1 << 26) ? "pm " : "",
954 cap & (1 << 25) ? "led " : "",
956 cap & (1 << 24) ? "clo " : "",
957 cap & (1 << 19) ? "nz " : "",
958 cap & (1 << 18) ? "only " : "",
959 cap & (1 << 17) ? "pmp " : "",
960 cap & (1 << 15) ? "pio " : "",
961 cap & (1 << 14) ? "slum " : "",
962 cap & (1 << 13) ? "part " : ""
966 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
968 static int printed_version;
969 struct ata_probe_ent *probe_ent = NULL;
970 struct ahci_host_priv *hpriv;
973 unsigned int board_idx = (unsigned int) ent->driver_data;
974 int have_msi, pci_dev_busy = 0;
979 if (!printed_version++)
980 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
982 rc = pci_enable_device(pdev);
986 rc = pci_request_regions(pdev, DRV_NAME);
992 if (pci_enable_msi(pdev) == 0)
999 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
1000 if (probe_ent == NULL) {
1005 memset(probe_ent, 0, sizeof(*probe_ent));
1006 probe_ent->dev = pci_dev_to_dev(pdev);
1007 INIT_LIST_HEAD(&probe_ent->node);
1009 mmio_base = ioremap(pci_resource_start(pdev, AHCI_PCI_BAR),
1010 pci_resource_len(pdev, AHCI_PCI_BAR));
1011 if (mmio_base == NULL) {
1013 goto err_out_free_ent;
1015 base = (unsigned long) mmio_base;
1017 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1020 goto err_out_iounmap;
1022 memset(hpriv, 0, sizeof(*hpriv));
1024 probe_ent->sht = ahci_port_info[board_idx].sht;
1025 probe_ent->host_flags = ahci_port_info[board_idx].host_flags;
1026 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
1027 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
1028 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
1030 probe_ent->irq = pdev->irq;
1031 probe_ent->irq_flags = SA_SHIRQ;
1032 probe_ent->mmio_base = mmio_base;
1033 probe_ent->private_data = hpriv;
1036 hpriv->flags |= AHCI_FLAG_MSI;
1038 /* initialize adapter */
1039 rc = ahci_host_init(probe_ent);
1043 ahci_print_info(probe_ent);
1045 /* FIXME: check ata_device_add return value */
1046 ata_device_add(probe_ent);
1059 pci_disable_msi(pdev);
1062 pci_release_regions(pdev);
1065 pci_disable_device(pdev);
1069 static void ahci_remove_one (struct pci_dev *pdev)
1071 struct device *dev = pci_dev_to_dev(pdev);
1072 struct ata_host_set *host_set = dev_get_drvdata(dev);
1073 struct ahci_host_priv *hpriv = host_set->private_data;
1074 struct ata_port *ap;
1078 for (i = 0; i < host_set->n_ports; i++) {
1079 ap = host_set->ports[i];
1081 scsi_remove_host(ap->host);
1084 have_msi = hpriv->flags & AHCI_FLAG_MSI;
1085 free_irq(host_set->irq, host_set);
1087 for (i = 0; i < host_set->n_ports; i++) {
1088 ap = host_set->ports[i];
1090 ata_scsi_release(ap->host);
1091 scsi_host_put(ap->host);
1094 host_set->ops->host_stop(host_set);
1098 pci_disable_msi(pdev);
1101 pci_release_regions(pdev);
1102 pci_disable_device(pdev);
1103 dev_set_drvdata(dev, NULL);
1106 static int __init ahci_init(void)
1108 return pci_module_init(&ahci_pci_driver);
1112 static void __exit ahci_exit(void)
1114 pci_unregister_driver(&ahci_pci_driver);
1118 MODULE_AUTHOR("Jeff Garzik");
1119 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1120 MODULE_LICENSE("GPL");
1121 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1123 module_init(ahci_init);
1124 module_exit(ahci_exit);