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 { 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 { 0x197b, 0x2360, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
290 board_ahci }, /* JMicron JMB360 */
291 { 0x197b, 0x2363, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
292 board_ahci }, /* JMicron JMB363 */
293 { } /* terminate list */
297 static struct pci_driver ahci_pci_driver = {
299 .id_table = ahci_pci_tbl,
300 .probe = ahci_init_one,
301 .remove = ahci_remove_one,
305 static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port)
307 return base + 0x100 + (port * 0x80);
310 static inline void __iomem *ahci_port_base (void __iomem *base, unsigned int port)
312 return (void __iomem *) ahci_port_base_ul((unsigned long)base, port);
315 static int ahci_port_start(struct ata_port *ap)
317 struct device *dev = ap->host_set->dev;
318 struct ahci_host_priv *hpriv = ap->host_set->private_data;
319 struct ahci_port_priv *pp;
320 void __iomem *mmio = ap->host_set->mmio_base;
321 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
326 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
329 memset(pp, 0, sizeof(*pp));
331 rc = ata_pad_alloc(ap, dev);
337 mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);
339 ata_pad_free(ap, dev);
343 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
346 * First item in chunk of DMA memory: 32-slot command table,
347 * 32 bytes each in size
350 pp->cmd_slot_dma = mem_dma;
352 mem += AHCI_CMD_SLOT_SZ;
353 mem_dma += AHCI_CMD_SLOT_SZ;
356 * Second item: Received-FIS area
359 pp->rx_fis_dma = mem_dma;
361 mem += AHCI_RX_FIS_SZ;
362 mem_dma += AHCI_RX_FIS_SZ;
365 * Third item: data area for storing a single command
366 * and its scatter-gather table
369 pp->cmd_tbl_dma = mem_dma;
371 pp->cmd_tbl_sg = mem + AHCI_CMD_TBL_HDR;
373 ap->private_data = pp;
375 if (hpriv->cap & HOST_CAP_64)
376 writel((pp->cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
377 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
378 readl(port_mmio + PORT_LST_ADDR); /* flush */
380 if (hpriv->cap & HOST_CAP_64)
381 writel((pp->rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
382 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
383 readl(port_mmio + PORT_FIS_ADDR); /* flush */
385 writel(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX |
386 PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP |
387 PORT_CMD_START, port_mmio + PORT_CMD);
388 readl(port_mmio + PORT_CMD); /* flush */
394 static void ahci_port_stop(struct ata_port *ap)
396 struct device *dev = ap->host_set->dev;
397 struct ahci_port_priv *pp = ap->private_data;
398 void __iomem *mmio = ap->host_set->mmio_base;
399 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
402 tmp = readl(port_mmio + PORT_CMD);
403 tmp &= ~(PORT_CMD_START | PORT_CMD_FIS_RX);
404 writel(tmp, port_mmio + PORT_CMD);
405 readl(port_mmio + PORT_CMD); /* flush */
407 /* spec says 500 msecs for each PORT_CMD_{START,FIS_RX} bit, so
408 * this is slightly incorrect.
412 ap->private_data = NULL;
413 dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,
414 pp->cmd_slot, pp->cmd_slot_dma);
415 ata_pad_free(ap, dev);
419 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
424 case SCR_STATUS: sc_reg = 0; break;
425 case SCR_CONTROL: sc_reg = 1; break;
426 case SCR_ERROR: sc_reg = 2; break;
427 case SCR_ACTIVE: sc_reg = 3; break;
432 return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
436 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
442 case SCR_STATUS: sc_reg = 0; break;
443 case SCR_CONTROL: sc_reg = 1; break;
444 case SCR_ERROR: sc_reg = 2; break;
445 case SCR_ACTIVE: sc_reg = 3; break;
450 writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
453 static void ahci_phy_reset(struct ata_port *ap)
455 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
456 struct ata_taskfile tf;
457 struct ata_device *dev = &ap->device[0];
460 __sata_phy_reset(ap);
462 if (ap->flags & ATA_FLAG_PORT_DISABLED)
465 tmp = readl(port_mmio + PORT_SIG);
466 tf.lbah = (tmp >> 24) & 0xff;
467 tf.lbam = (tmp >> 16) & 0xff;
468 tf.lbal = (tmp >> 8) & 0xff;
469 tf.nsect = (tmp) & 0xff;
471 dev->class = ata_dev_classify(&tf);
472 if (!ata_dev_present(dev)) {
473 ata_port_disable(ap);
477 /* Make sure port's ATAPI bit is set appropriately */
478 new_tmp = tmp = readl(port_mmio + PORT_CMD);
479 if (dev->class == ATA_DEV_ATAPI)
480 new_tmp |= PORT_CMD_ATAPI;
482 new_tmp &= ~PORT_CMD_ATAPI;
483 if (new_tmp != tmp) {
484 writel(new_tmp, port_mmio + PORT_CMD);
485 readl(port_mmio + PORT_CMD); /* flush */
489 static u8 ahci_check_status(struct ata_port *ap)
491 void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr;
493 return readl(mmio + PORT_TFDATA) & 0xFF;
496 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
498 struct ahci_port_priv *pp = ap->private_data;
499 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
501 ata_tf_from_fis(d2h_fis, tf);
504 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc)
506 struct ahci_port_priv *pp = qc->ap->private_data;
507 struct scatterlist *sg;
508 struct ahci_sg *ahci_sg;
509 unsigned int n_sg = 0;
514 * Next, the S/G list.
516 ahci_sg = pp->cmd_tbl_sg;
517 ata_for_each_sg(sg, qc) {
518 dma_addr_t addr = sg_dma_address(sg);
519 u32 sg_len = sg_dma_len(sg);
521 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
522 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
523 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
532 static void ahci_qc_prep(struct ata_queued_cmd *qc)
534 struct ata_port *ap = qc->ap;
535 struct ahci_port_priv *pp = ap->private_data;
537 const u32 cmd_fis_len = 5; /* five dwords */
541 * Fill in command slot information (currently only one slot,
542 * slot 0, is currently since we don't do queueing)
546 if (qc->tf.flags & ATA_TFLAG_WRITE)
547 opts |= AHCI_CMD_WRITE;
548 if (is_atapi_taskfile(&qc->tf))
549 opts |= AHCI_CMD_ATAPI;
551 pp->cmd_slot[0].opts = cpu_to_le32(opts);
552 pp->cmd_slot[0].status = 0;
553 pp->cmd_slot[0].tbl_addr = cpu_to_le32(pp->cmd_tbl_dma & 0xffffffff);
554 pp->cmd_slot[0].tbl_addr_hi = cpu_to_le32((pp->cmd_tbl_dma >> 16) >> 16);
557 * Fill in command table information. First, the header,
558 * a SATA Register - Host to Device command FIS.
560 ata_tf_to_fis(&qc->tf, pp->cmd_tbl, 0);
561 if (opts & AHCI_CMD_ATAPI) {
562 memset(pp->cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
563 memcpy(pp->cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, ap->cdb_len);
566 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
569 n_elem = ahci_fill_sg(qc);
571 pp->cmd_slot[0].opts |= cpu_to_le32(n_elem << 16);
574 static void ahci_restart_port(struct ata_port *ap, u32 irq_stat)
576 void __iomem *mmio = ap->host_set->mmio_base;
577 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
581 if ((ap->device[0].class != ATA_DEV_ATAPI) ||
582 ((irq_stat & PORT_IRQ_TF_ERR) == 0))
583 printk(KERN_WARNING "ata%u: port reset, "
584 "p_is %x is %x pis %x cmd %x tf %x ss %x se %x\n",
587 readl(mmio + HOST_IRQ_STAT),
588 readl(port_mmio + PORT_IRQ_STAT),
589 readl(port_mmio + PORT_CMD),
590 readl(port_mmio + PORT_TFDATA),
591 readl(port_mmio + PORT_SCR_STAT),
592 readl(port_mmio + PORT_SCR_ERR));
595 tmp = readl(port_mmio + PORT_CMD);
596 tmp &= ~PORT_CMD_START;
597 writel(tmp, port_mmio + PORT_CMD);
599 /* wait for engine to stop. TODO: this could be
600 * as long as 500 msec
604 tmp = readl(port_mmio + PORT_CMD);
605 if ((tmp & PORT_CMD_LIST_ON) == 0)
610 /* clear SATA phy error, if any */
611 tmp = readl(port_mmio + PORT_SCR_ERR);
612 writel(tmp, port_mmio + PORT_SCR_ERR);
614 /* if DRQ/BSY is set, device needs to be reset.
615 * if so, issue COMRESET
617 tmp = readl(port_mmio + PORT_TFDATA);
618 if (tmp & (ATA_BUSY | ATA_DRQ)) {
619 writel(0x301, port_mmio + PORT_SCR_CTL);
620 readl(port_mmio + PORT_SCR_CTL); /* flush */
622 writel(0x300, port_mmio + PORT_SCR_CTL);
623 readl(port_mmio + PORT_SCR_CTL); /* flush */
627 tmp = readl(port_mmio + PORT_CMD);
628 tmp |= PORT_CMD_START;
629 writel(tmp, port_mmio + PORT_CMD);
630 readl(port_mmio + PORT_CMD); /* flush */
633 static void ahci_eng_timeout(struct ata_port *ap)
635 struct ata_host_set *host_set = ap->host_set;
636 void __iomem *mmio = host_set->mmio_base;
637 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
638 struct ata_queued_cmd *qc;
641 printk(KERN_WARNING "ata%u: handling error/timeout\n", ap->id);
643 spin_lock_irqsave(&host_set->lock, flags);
645 qc = ata_qc_from_tag(ap, ap->active_tag);
647 printk(KERN_ERR "ata%u: BUG: timeout without command\n",
650 ahci_restart_port(ap, readl(port_mmio + PORT_IRQ_STAT));
652 /* hack alert! We cannot use the supplied completion
653 * function from inside the ->eh_strategy_handler() thread.
654 * libata is the only user of ->eh_strategy_handler() in
655 * any kernel, so the default scsi_done() assumes it is
656 * not being called from the SCSI EH.
658 qc->scsidone = scsi_finish_command;
659 qc->err_mask |= AC_ERR_OTHER;
663 spin_unlock_irqrestore(&host_set->lock, flags);
666 static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
668 void __iomem *mmio = ap->host_set->mmio_base;
669 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
670 u32 status, serr, ci;
672 serr = readl(port_mmio + PORT_SCR_ERR);
673 writel(serr, port_mmio + PORT_SCR_ERR);
675 status = readl(port_mmio + PORT_IRQ_STAT);
676 writel(status, port_mmio + PORT_IRQ_STAT);
678 ci = readl(port_mmio + PORT_CMD_ISSUE);
679 if (likely((ci & 0x1) == 0)) {
681 assert(qc->err_mask == 0);
687 if (status & PORT_IRQ_FATAL) {
688 unsigned int err_mask;
689 if (status & PORT_IRQ_TF_ERR)
690 err_mask = AC_ERR_DEV;
691 else if (status & PORT_IRQ_IF_ERR)
692 err_mask = AC_ERR_ATA_BUS;
694 err_mask = AC_ERR_HOST_BUS;
696 /* command processing has stopped due to error; restart */
697 ahci_restart_port(ap, status);
700 qc->err_mask |= AC_ERR_OTHER;
708 static void ahci_irq_clear(struct ata_port *ap)
713 static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
715 struct ata_host_set *host_set = dev_instance;
716 struct ahci_host_priv *hpriv;
717 unsigned int i, handled = 0;
719 u32 irq_stat, irq_ack = 0;
723 hpriv = host_set->private_data;
724 mmio = host_set->mmio_base;
726 /* sigh. 0xffffffff is a valid return from h/w */
727 irq_stat = readl(mmio + HOST_IRQ_STAT);
728 irq_stat &= hpriv->port_map;
732 spin_lock(&host_set->lock);
734 for (i = 0; i < host_set->n_ports; i++) {
737 if (!(irq_stat & (1 << i)))
740 ap = host_set->ports[i];
742 struct ata_queued_cmd *qc;
743 qc = ata_qc_from_tag(ap, ap->active_tag);
744 if (!ahci_host_intr(ap, qc))
746 dev_printk(KERN_WARNING, host_set->dev,
747 "unhandled interrupt on port %u\n",
750 VPRINTK("port %u\n", i);
752 VPRINTK("port %u (no irq)\n", i);
754 dev_printk(KERN_WARNING, host_set->dev,
755 "interrupt on disabled port %u\n", i);
762 writel(irq_ack, mmio + HOST_IRQ_STAT);
766 spin_unlock(&host_set->lock);
770 return IRQ_RETVAL(handled);
773 static int ahci_qc_issue(struct ata_queued_cmd *qc)
775 struct ata_port *ap = qc->ap;
776 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
778 writel(1, port_mmio + PORT_CMD_ISSUE);
779 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
784 static void ahci_setup_port(struct ata_ioports *port, unsigned long base,
785 unsigned int port_idx)
787 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
788 base = ahci_port_base_ul(base, port_idx);
789 VPRINTK("base now==0x%lx\n", base);
791 port->cmd_addr = base;
792 port->scr_addr = base + PORT_SCR;
797 static int ahci_host_init(struct ata_probe_ent *probe_ent)
799 struct ahci_host_priv *hpriv = probe_ent->private_data;
800 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
801 void __iomem *mmio = probe_ent->mmio_base;
803 unsigned int i, j, using_dac;
805 void __iomem *port_mmio;
807 cap_save = readl(mmio + HOST_CAP);
808 cap_save &= ( (1<<28) | (1<<17) );
809 cap_save |= (1 << 27);
811 /* global controller reset */
812 tmp = readl(mmio + HOST_CTL);
813 if ((tmp & HOST_RESET) == 0) {
814 writel(tmp | HOST_RESET, mmio + HOST_CTL);
815 readl(mmio + HOST_CTL); /* flush */
818 /* reset must complete within 1 second, or
819 * the hardware should be considered fried.
823 tmp = readl(mmio + HOST_CTL);
824 if (tmp & HOST_RESET) {
825 dev_printk(KERN_ERR, &pdev->dev,
826 "controller reset failed (0x%x)\n", tmp);
830 writel(HOST_AHCI_EN, mmio + HOST_CTL);
831 (void) readl(mmio + HOST_CTL); /* flush */
832 writel(cap_save, mmio + HOST_CAP);
833 writel(0xf, mmio + HOST_PORTS_IMPL);
834 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
836 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
839 pci_read_config_word(pdev, 0x92, &tmp16);
841 pci_write_config_word(pdev, 0x92, tmp16);
844 hpriv->cap = readl(mmio + HOST_CAP);
845 hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
846 probe_ent->n_ports = (hpriv->cap & 0x1f) + 1;
848 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
849 hpriv->cap, hpriv->port_map, probe_ent->n_ports);
851 using_dac = hpriv->cap & HOST_CAP_64;
853 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
854 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
856 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
858 dev_printk(KERN_ERR, &pdev->dev,
859 "64-bit DMA enable failed\n");
864 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
866 dev_printk(KERN_ERR, &pdev->dev,
867 "32-bit DMA enable failed\n");
870 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
872 dev_printk(KERN_ERR, &pdev->dev,
873 "32-bit consistent DMA enable failed\n");
878 for (i = 0; i < probe_ent->n_ports; i++) {
879 #if 0 /* BIOSen initialize this incorrectly */
880 if (!(hpriv->port_map & (1 << i)))
884 port_mmio = ahci_port_base(mmio, i);
885 VPRINTK("mmio %p port_mmio %p\n", mmio, port_mmio);
887 ahci_setup_port(&probe_ent->port[i],
888 (unsigned long) mmio, i);
890 /* make sure port is not active */
891 tmp = readl(port_mmio + PORT_CMD);
892 VPRINTK("PORT_CMD 0x%x\n", tmp);
893 if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
894 PORT_CMD_FIS_RX | PORT_CMD_START)) {
895 tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
896 PORT_CMD_FIS_RX | PORT_CMD_START);
897 writel(tmp, port_mmio + PORT_CMD);
898 readl(port_mmio + PORT_CMD); /* flush */
900 /* spec says 500 msecs for each bit, so
901 * this is slightly incorrect.
906 writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD);
911 tmp = readl(port_mmio + PORT_SCR_STAT);
912 if ((tmp & 0xf) == 0x3)
917 tmp = readl(port_mmio + PORT_SCR_ERR);
918 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
919 writel(tmp, port_mmio + PORT_SCR_ERR);
921 /* ack any pending irq events for this port */
922 tmp = readl(port_mmio + PORT_IRQ_STAT);
923 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
925 writel(tmp, port_mmio + PORT_IRQ_STAT);
927 writel(1 << i, mmio + HOST_IRQ_STAT);
929 /* set irq mask (enables interrupts) */
930 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
933 tmp = readl(mmio + HOST_CTL);
934 VPRINTK("HOST_CTL 0x%x\n", tmp);
935 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
936 tmp = readl(mmio + HOST_CTL);
937 VPRINTK("HOST_CTL 0x%x\n", tmp);
939 pci_set_master(pdev);
944 static void ahci_print_info(struct ata_probe_ent *probe_ent)
946 struct ahci_host_priv *hpriv = probe_ent->private_data;
947 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
948 void __iomem *mmio = probe_ent->mmio_base;
949 u32 vers, cap, impl, speed;
954 vers = readl(mmio + HOST_VERSION);
956 impl = hpriv->port_map;
958 speed = (cap >> 20) & 0xf;
966 pci_read_config_word(pdev, 0x0a, &cc);
969 else if (cc == 0x0106)
971 else if (cc == 0x0104)
976 dev_printk(KERN_INFO, &pdev->dev,
977 "AHCI %02x%02x.%02x%02x "
978 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
986 ((cap >> 8) & 0x1f) + 1,
992 dev_printk(KERN_INFO, &pdev->dev,
998 cap & (1 << 31) ? "64bit " : "",
999 cap & (1 << 30) ? "ncq " : "",
1000 cap & (1 << 28) ? "ilck " : "",
1001 cap & (1 << 27) ? "stag " : "",
1002 cap & (1 << 26) ? "pm " : "",
1003 cap & (1 << 25) ? "led " : "",
1005 cap & (1 << 24) ? "clo " : "",
1006 cap & (1 << 19) ? "nz " : "",
1007 cap & (1 << 18) ? "only " : "",
1008 cap & (1 << 17) ? "pmp " : "",
1009 cap & (1 << 15) ? "pio " : "",
1010 cap & (1 << 14) ? "slum " : "",
1011 cap & (1 << 13) ? "part " : ""
1015 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1017 static int printed_version;
1018 struct ata_probe_ent *probe_ent = NULL;
1019 struct ahci_host_priv *hpriv;
1021 void __iomem *mmio_base;
1022 unsigned int board_idx = (unsigned int) ent->driver_data;
1023 int have_msi, pci_dev_busy = 0;
1028 if (!printed_version++)
1029 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1031 rc = pci_enable_device(pdev);
1035 rc = pci_request_regions(pdev, DRV_NAME);
1041 if (pci_enable_msi(pdev) == 0)
1048 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
1049 if (probe_ent == NULL) {
1054 memset(probe_ent, 0, sizeof(*probe_ent));
1055 probe_ent->dev = pci_dev_to_dev(pdev);
1056 INIT_LIST_HEAD(&probe_ent->node);
1058 mmio_base = pci_iomap(pdev, AHCI_PCI_BAR, 0);
1059 if (mmio_base == NULL) {
1061 goto err_out_free_ent;
1063 base = (unsigned long) mmio_base;
1065 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1068 goto err_out_iounmap;
1070 memset(hpriv, 0, sizeof(*hpriv));
1072 probe_ent->sht = ahci_port_info[board_idx].sht;
1073 probe_ent->host_flags = ahci_port_info[board_idx].host_flags;
1074 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
1075 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
1076 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
1078 probe_ent->irq = pdev->irq;
1079 probe_ent->irq_flags = SA_SHIRQ;
1080 probe_ent->mmio_base = mmio_base;
1081 probe_ent->private_data = hpriv;
1084 hpriv->flags |= AHCI_FLAG_MSI;
1086 /* JMicron-specific fixup: make sure we're in AHCI mode */
1087 if (pdev->vendor == 0x197b)
1088 pci_write_config_byte(pdev, 0x41, 0xa1);
1090 /* initialize adapter */
1091 rc = ahci_host_init(probe_ent);
1095 ahci_print_info(probe_ent);
1097 /* FIXME: check ata_device_add return value */
1098 ata_device_add(probe_ent);
1106 pci_iounmap(pdev, mmio_base);
1111 pci_disable_msi(pdev);
1114 pci_release_regions(pdev);
1117 pci_disable_device(pdev);
1121 static void ahci_remove_one (struct pci_dev *pdev)
1123 struct device *dev = pci_dev_to_dev(pdev);
1124 struct ata_host_set *host_set = dev_get_drvdata(dev);
1125 struct ahci_host_priv *hpriv = host_set->private_data;
1126 struct ata_port *ap;
1130 for (i = 0; i < host_set->n_ports; i++) {
1131 ap = host_set->ports[i];
1133 scsi_remove_host(ap->host);
1136 have_msi = hpriv->flags & AHCI_FLAG_MSI;
1137 free_irq(host_set->irq, host_set);
1139 for (i = 0; i < host_set->n_ports; i++) {
1140 ap = host_set->ports[i];
1142 ata_scsi_release(ap->host);
1143 scsi_host_put(ap->host);
1147 pci_iounmap(pdev, host_set->mmio_base);
1151 pci_disable_msi(pdev);
1154 pci_release_regions(pdev);
1155 pci_disable_device(pdev);
1156 dev_set_drvdata(dev, NULL);
1159 static int __init ahci_init(void)
1161 return pci_module_init(&ahci_pci_driver);
1164 static void __exit ahci_exit(void)
1166 pci_unregister_driver(&ahci_pci_driver);
1170 MODULE_AUTHOR("Jeff Garzik");
1171 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1172 MODULE_LICENSE("GPL");
1173 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1174 MODULE_VERSION(DRV_VERSION);
1176 module_init(ahci_init);
1177 module_exit(ahci_exit);