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 "2.0"
56 AHCI_MAX_SG = 168, /* hardware max is 64K */
57 AHCI_DMA_BOUNDARY = 0xffffffff,
58 AHCI_USE_CLUSTERING = 0,
61 AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ,
63 AHCI_CMD_TBL_CDB = 0x40,
64 AHCI_CMD_TBL_HDR_SZ = 0x80,
65 AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16),
66 AHCI_CMD_TBL_AR_SZ = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS,
67 AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ +
69 AHCI_IRQ_ON_SG = (1 << 31),
70 AHCI_CMD_ATAPI = (1 << 5),
71 AHCI_CMD_WRITE = (1 << 6),
72 AHCI_CMD_PREFETCH = (1 << 7),
73 AHCI_CMD_RESET = (1 << 8),
74 AHCI_CMD_CLR_BUSY = (1 << 10),
76 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
77 RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */
80 board_ahci_vt8251 = 1,
82 /* global controller registers */
83 HOST_CAP = 0x00, /* host capabilities */
84 HOST_CTL = 0x04, /* global host control */
85 HOST_IRQ_STAT = 0x08, /* interrupt status */
86 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
87 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
90 HOST_RESET = (1 << 0), /* reset controller; self-clear */
91 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
92 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
95 HOST_CAP_SSC = (1 << 14), /* Slumber capable */
96 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
97 HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
98 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
99 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
101 /* registers for each SATA port */
102 PORT_LST_ADDR = 0x00, /* command list DMA addr */
103 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
104 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
105 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
106 PORT_IRQ_STAT = 0x10, /* interrupt status */
107 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
108 PORT_CMD = 0x18, /* port command */
109 PORT_TFDATA = 0x20, /* taskfile data */
110 PORT_SIG = 0x24, /* device TF signature */
111 PORT_CMD_ISSUE = 0x38, /* command issue */
112 PORT_SCR = 0x28, /* SATA phy register block */
113 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
114 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
115 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
116 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
118 /* PORT_IRQ_{STAT,MASK} bits */
119 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
120 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
121 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
122 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
123 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
124 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
125 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
126 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
128 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
129 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
130 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
131 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
132 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
133 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
134 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
135 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
136 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
138 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
143 PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
145 PORT_IRQ_HBUS_DATA_ERR,
146 DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
147 PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
148 PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
151 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
152 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
153 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
154 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
155 PORT_CMD_CLO = (1 << 3), /* Command list override */
156 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
157 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
158 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
160 PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
161 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
162 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
163 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
165 /* hpriv->flags bits */
166 AHCI_FLAG_MSI = (1 << 0),
169 AHCI_FLAG_RESET_NEEDS_CLO = (1 << 24),
170 AHCI_FLAG_NO_NCQ = (1 << 25),
173 struct ahci_cmd_hdr {
188 struct ahci_host_priv {
190 u32 cap; /* cache of HOST_CAP register */
191 u32 port_map; /* cache of HOST_PORTS_IMPL reg */
194 struct ahci_port_priv {
195 struct ahci_cmd_hdr *cmd_slot;
196 dma_addr_t cmd_slot_dma;
198 dma_addr_t cmd_tbl_dma;
200 dma_addr_t rx_fis_dma;
203 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
204 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
205 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
206 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
207 static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
208 static void ahci_irq_clear(struct ata_port *ap);
209 static int ahci_port_start(struct ata_port *ap);
210 static void ahci_port_stop(struct ata_port *ap);
211 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
212 static void ahci_qc_prep(struct ata_queued_cmd *qc);
213 static u8 ahci_check_status(struct ata_port *ap);
214 static void ahci_freeze(struct ata_port *ap);
215 static void ahci_thaw(struct ata_port *ap);
216 static void ahci_error_handler(struct ata_port *ap);
217 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
218 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
219 static int ahci_port_resume(struct ata_port *ap);
220 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
221 static int ahci_pci_device_resume(struct pci_dev *pdev);
222 static void ahci_remove_one (struct pci_dev *pdev);
224 static struct scsi_host_template ahci_sht = {
225 .module = THIS_MODULE,
227 .ioctl = ata_scsi_ioctl,
228 .queuecommand = ata_scsi_queuecmd,
229 .change_queue_depth = ata_scsi_change_queue_depth,
230 .can_queue = AHCI_MAX_CMDS - 1,
231 .this_id = ATA_SHT_THIS_ID,
232 .sg_tablesize = AHCI_MAX_SG,
233 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
234 .emulated = ATA_SHT_EMULATED,
235 .use_clustering = AHCI_USE_CLUSTERING,
236 .proc_name = DRV_NAME,
237 .dma_boundary = AHCI_DMA_BOUNDARY,
238 .slave_configure = ata_scsi_slave_config,
239 .slave_destroy = ata_scsi_slave_destroy,
240 .bios_param = ata_std_bios_param,
241 .suspend = ata_scsi_device_suspend,
242 .resume = ata_scsi_device_resume,
245 static const struct ata_port_operations ahci_ops = {
246 .port_disable = ata_port_disable,
248 .check_status = ahci_check_status,
249 .check_altstatus = ahci_check_status,
250 .dev_select = ata_noop_dev_select,
252 .tf_read = ahci_tf_read,
254 .qc_prep = ahci_qc_prep,
255 .qc_issue = ahci_qc_issue,
257 .irq_handler = ahci_interrupt,
258 .irq_clear = ahci_irq_clear,
260 .scr_read = ahci_scr_read,
261 .scr_write = ahci_scr_write,
263 .freeze = ahci_freeze,
266 .error_handler = ahci_error_handler,
267 .post_internal_cmd = ahci_post_internal_cmd,
269 .port_suspend = ahci_port_suspend,
270 .port_resume = ahci_port_resume,
272 .port_start = ahci_port_start,
273 .port_stop = ahci_port_stop,
276 static const struct ata_port_info ahci_port_info[] = {
280 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
281 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
282 ATA_FLAG_SKIP_D2H_BSY,
283 .pio_mask = 0x1f, /* pio0-4 */
284 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
285 .port_ops = &ahci_ops,
287 /* board_ahci_vt8251 */
290 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
291 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
292 ATA_FLAG_SKIP_D2H_BSY |
293 AHCI_FLAG_RESET_NEEDS_CLO | AHCI_FLAG_NO_NCQ,
294 .pio_mask = 0x1f, /* pio0-4 */
295 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
296 .port_ops = &ahci_ops,
300 static const struct pci_device_id ahci_pci_tbl[] = {
302 { PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */
303 { PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */
304 { PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */
305 { PCI_VDEVICE(INTEL, 0x27c5), board_ahci }, /* ICH7M */
306 { PCI_VDEVICE(INTEL, 0x27c3), board_ahci }, /* ICH7R */
307 { PCI_VDEVICE(AL, 0x5288), board_ahci }, /* ULi M5288 */
308 { PCI_VDEVICE(INTEL, 0x2681), board_ahci }, /* ESB2 */
309 { PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */
310 { PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */
311 { PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */
312 { PCI_VDEVICE(INTEL, 0x2821), board_ahci }, /* ICH8 */
313 { PCI_VDEVICE(INTEL, 0x2822), board_ahci }, /* ICH8 */
314 { PCI_VDEVICE(INTEL, 0x2824), board_ahci }, /* ICH8 */
315 { PCI_VDEVICE(INTEL, 0x2829), board_ahci }, /* ICH8M */
316 { PCI_VDEVICE(INTEL, 0x282a), board_ahci }, /* ICH8M */
319 { PCI_VDEVICE(JMICRON, 0x2360), board_ahci }, /* JMicron JMB360 */
320 { PCI_VDEVICE(JMICRON, 0x2361), board_ahci }, /* JMicron JMB361 */
321 { PCI_VDEVICE(JMICRON, 0x2363), board_ahci }, /* JMicron JMB363 */
322 { PCI_VDEVICE(JMICRON, 0x2365), board_ahci }, /* JMicron JMB365 */
323 { PCI_VDEVICE(JMICRON, 0x2366), board_ahci }, /* JMicron JMB366 */
326 { PCI_VDEVICE(ATI, 0x4380), board_ahci }, /* ATI SB600 non-raid */
327 { PCI_VDEVICE(ATI, 0x4381), board_ahci }, /* ATI SB600 raid */
330 { PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
333 { PCI_VDEVICE(NVIDIA, 0x044c), board_ahci }, /* MCP65 */
334 { PCI_VDEVICE(NVIDIA, 0x044d), board_ahci }, /* MCP65 */
335 { PCI_VDEVICE(NVIDIA, 0x044e), board_ahci }, /* MCP65 */
336 { PCI_VDEVICE(NVIDIA, 0x044f), board_ahci }, /* MCP65 */
339 { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
340 { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
341 { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
343 { } /* terminate list */
347 static struct pci_driver ahci_pci_driver = {
349 .id_table = ahci_pci_tbl,
350 .probe = ahci_init_one,
351 .suspend = ahci_pci_device_suspend,
352 .resume = ahci_pci_device_resume,
353 .remove = ahci_remove_one,
357 static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port)
359 return base + 0x100 + (port * 0x80);
362 static inline void __iomem *ahci_port_base (void __iomem *base, unsigned int port)
364 return (void __iomem *) ahci_port_base_ul((unsigned long)base, port);
367 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
372 case SCR_STATUS: sc_reg = 0; break;
373 case SCR_CONTROL: sc_reg = 1; break;
374 case SCR_ERROR: sc_reg = 2; break;
375 case SCR_ACTIVE: sc_reg = 3; break;
380 return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
384 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
390 case SCR_STATUS: sc_reg = 0; break;
391 case SCR_CONTROL: sc_reg = 1; break;
392 case SCR_ERROR: sc_reg = 2; break;
393 case SCR_ACTIVE: sc_reg = 3; break;
398 writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
401 static void ahci_start_engine(void __iomem *port_mmio)
406 tmp = readl(port_mmio + PORT_CMD);
407 tmp |= PORT_CMD_START;
408 writel(tmp, port_mmio + PORT_CMD);
409 readl(port_mmio + PORT_CMD); /* flush */
412 static int ahci_stop_engine(void __iomem *port_mmio)
416 tmp = readl(port_mmio + PORT_CMD);
418 /* check if the HBA is idle */
419 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
422 /* setting HBA to idle */
423 tmp &= ~PORT_CMD_START;
424 writel(tmp, port_mmio + PORT_CMD);
426 /* wait for engine to stop. This could be as long as 500 msec */
427 tmp = ata_wait_register(port_mmio + PORT_CMD,
428 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
429 if (tmp & PORT_CMD_LIST_ON)
435 static void ahci_start_fis_rx(void __iomem *port_mmio, u32 cap,
436 dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
440 /* set FIS registers */
441 if (cap & HOST_CAP_64)
442 writel((cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
443 writel(cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
445 if (cap & HOST_CAP_64)
446 writel((rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
447 writel(rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
449 /* enable FIS reception */
450 tmp = readl(port_mmio + PORT_CMD);
451 tmp |= PORT_CMD_FIS_RX;
452 writel(tmp, port_mmio + PORT_CMD);
455 readl(port_mmio + PORT_CMD);
458 static int ahci_stop_fis_rx(void __iomem *port_mmio)
462 /* disable FIS reception */
463 tmp = readl(port_mmio + PORT_CMD);
464 tmp &= ~PORT_CMD_FIS_RX;
465 writel(tmp, port_mmio + PORT_CMD);
467 /* wait for completion, spec says 500ms, give it 1000 */
468 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
469 PORT_CMD_FIS_ON, 10, 1000);
470 if (tmp & PORT_CMD_FIS_ON)
476 static void ahci_power_up(void __iomem *port_mmio, u32 cap)
480 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
483 if (cap & HOST_CAP_SSS) {
484 cmd |= PORT_CMD_SPIN_UP;
485 writel(cmd, port_mmio + PORT_CMD);
489 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
492 static void ahci_power_down(void __iomem *port_mmio, u32 cap)
496 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
498 if (cap & HOST_CAP_SSC) {
499 /* enable transitions to slumber mode */
500 scontrol = readl(port_mmio + PORT_SCR_CTL);
501 if ((scontrol & 0x0f00) > 0x100) {
503 writel(scontrol, port_mmio + PORT_SCR_CTL);
506 /* put device into slumber mode */
507 writel(cmd | PORT_CMD_ICC_SLUMBER, port_mmio + PORT_CMD);
509 /* wait for the transition to complete */
510 ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_ICC_SLUMBER,
511 PORT_CMD_ICC_SLUMBER, 1, 50);
514 /* put device into listen mode */
515 if (cap & HOST_CAP_SSS) {
516 /* first set PxSCTL.DET to 0 */
517 scontrol = readl(port_mmio + PORT_SCR_CTL);
519 writel(scontrol, port_mmio + PORT_SCR_CTL);
521 /* then set PxCMD.SUD to 0 */
522 cmd &= ~PORT_CMD_SPIN_UP;
523 writel(cmd, port_mmio + PORT_CMD);
527 static void ahci_init_port(void __iomem *port_mmio, u32 cap,
528 dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
531 ahci_power_up(port_mmio, cap);
533 /* enable FIS reception */
534 ahci_start_fis_rx(port_mmio, cap, cmd_slot_dma, rx_fis_dma);
537 ahci_start_engine(port_mmio);
540 static int ahci_deinit_port(void __iomem *port_mmio, u32 cap, const char **emsg)
545 rc = ahci_stop_engine(port_mmio);
547 *emsg = "failed to stop engine";
551 /* disable FIS reception */
552 rc = ahci_stop_fis_rx(port_mmio);
554 *emsg = "failed stop FIS RX";
558 /* put device into slumber mode */
559 ahci_power_down(port_mmio, cap);
564 static int ahci_reset_controller(void __iomem *mmio, struct pci_dev *pdev)
568 cap_save = readl(mmio + HOST_CAP);
569 cap_save &= ( (1<<28) | (1<<17) );
570 cap_save |= (1 << 27);
572 /* global controller reset */
573 tmp = readl(mmio + HOST_CTL);
574 if ((tmp & HOST_RESET) == 0) {
575 writel(tmp | HOST_RESET, mmio + HOST_CTL);
576 readl(mmio + HOST_CTL); /* flush */
579 /* reset must complete within 1 second, or
580 * the hardware should be considered fried.
584 tmp = readl(mmio + HOST_CTL);
585 if (tmp & HOST_RESET) {
586 dev_printk(KERN_ERR, &pdev->dev,
587 "controller reset failed (0x%x)\n", tmp);
591 writel(HOST_AHCI_EN, mmio + HOST_CTL);
592 (void) readl(mmio + HOST_CTL); /* flush */
593 writel(cap_save, mmio + HOST_CAP);
594 writel(0xf, mmio + HOST_PORTS_IMPL);
595 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
597 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
601 pci_read_config_word(pdev, 0x92, &tmp16);
603 pci_write_config_word(pdev, 0x92, tmp16);
609 static void ahci_init_controller(void __iomem *mmio, struct pci_dev *pdev,
610 int n_ports, u32 cap)
615 for (i = 0; i < n_ports; i++) {
616 void __iomem *port_mmio = ahci_port_base(mmio, i);
617 const char *emsg = NULL;
619 #if 0 /* BIOSen initialize this incorrectly */
620 if (!(hpriv->port_map & (1 << i)))
624 /* make sure port is not active */
625 rc = ahci_deinit_port(port_mmio, cap, &emsg);
627 dev_printk(KERN_WARNING, &pdev->dev,
628 "%s (%d)\n", emsg, rc);
631 tmp = readl(port_mmio + PORT_SCR_ERR);
632 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
633 writel(tmp, port_mmio + PORT_SCR_ERR);
636 tmp = readl(port_mmio + PORT_IRQ_STAT);
637 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
639 writel(tmp, port_mmio + PORT_IRQ_STAT);
641 writel(1 << i, mmio + HOST_IRQ_STAT);
644 tmp = readl(mmio + HOST_CTL);
645 VPRINTK("HOST_CTL 0x%x\n", tmp);
646 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
647 tmp = readl(mmio + HOST_CTL);
648 VPRINTK("HOST_CTL 0x%x\n", tmp);
651 static unsigned int ahci_dev_classify(struct ata_port *ap)
653 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
654 struct ata_taskfile tf;
657 tmp = readl(port_mmio + PORT_SIG);
658 tf.lbah = (tmp >> 24) & 0xff;
659 tf.lbam = (tmp >> 16) & 0xff;
660 tf.lbal = (tmp >> 8) & 0xff;
661 tf.nsect = (tmp) & 0xff;
663 return ata_dev_classify(&tf);
666 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
669 dma_addr_t cmd_tbl_dma;
671 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
673 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
674 pp->cmd_slot[tag].status = 0;
675 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
676 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
679 static int ahci_clo(struct ata_port *ap)
681 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
682 struct ahci_host_priv *hpriv = ap->host->private_data;
685 if (!(hpriv->cap & HOST_CAP_CLO))
688 tmp = readl(port_mmio + PORT_CMD);
690 writel(tmp, port_mmio + PORT_CMD);
692 tmp = ata_wait_register(port_mmio + PORT_CMD,
693 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
694 if (tmp & PORT_CMD_CLO)
700 static int ahci_prereset(struct ata_port *ap)
702 if ((ap->flags & AHCI_FLAG_RESET_NEEDS_CLO) &&
703 (ata_busy_wait(ap, ATA_BUSY, 1000) & ATA_BUSY)) {
704 /* ATA_BUSY hasn't cleared, so send a CLO */
708 return ata_std_prereset(ap);
711 static int ahci_softreset(struct ata_port *ap, unsigned int *class)
713 struct ahci_port_priv *pp = ap->private_data;
714 void __iomem *mmio = ap->host->mmio_base;
715 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
716 const u32 cmd_fis_len = 5; /* five dwords */
717 const char *reason = NULL;
718 struct ata_taskfile tf;
725 if (ata_port_offline(ap)) {
726 DPRINTK("PHY reports no device\n");
727 *class = ATA_DEV_NONE;
731 /* prepare for SRST (AHCI-1.1 10.4.1) */
732 rc = ahci_stop_engine(port_mmio);
734 reason = "failed to stop engine";
738 /* check BUSY/DRQ, perform Command List Override if necessary */
739 ahci_tf_read(ap, &tf);
740 if (tf.command & (ATA_BUSY | ATA_DRQ)) {
743 if (rc == -EOPNOTSUPP) {
744 reason = "port busy but CLO unavailable";
747 reason = "port busy but CLO failed";
753 ahci_start_engine(port_mmio);
755 ata_tf_init(ap->device, &tf);
758 /* issue the first D2H Register FIS */
759 ahci_fill_cmd_slot(pp, 0,
760 cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
763 ata_tf_to_fis(&tf, fis, 0);
764 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
766 writel(1, port_mmio + PORT_CMD_ISSUE);
768 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, 500);
771 reason = "1st FIS failed";
775 /* spec says at least 5us, but be generous and sleep for 1ms */
778 /* issue the second D2H Register FIS */
779 ahci_fill_cmd_slot(pp, 0, cmd_fis_len);
782 ata_tf_to_fis(&tf, fis, 0);
783 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
785 writel(1, port_mmio + PORT_CMD_ISSUE);
786 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
788 /* spec mandates ">= 2ms" before checking status.
789 * We wait 150ms, because that was the magic delay used for
790 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
791 * between when the ATA command register is written, and then
792 * status is checked. Because waiting for "a while" before
793 * checking status is fine, post SRST, we perform this magic
794 * delay here as well.
798 *class = ATA_DEV_NONE;
799 if (ata_port_online(ap)) {
800 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
802 reason = "device not ready";
805 *class = ahci_dev_classify(ap);
808 DPRINTK("EXIT, class=%u\n", *class);
812 ahci_start_engine(port_mmio);
814 ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
818 static int ahci_hardreset(struct ata_port *ap, unsigned int *class)
820 struct ahci_port_priv *pp = ap->private_data;
821 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
822 struct ata_taskfile tf;
823 void __iomem *mmio = ap->host->mmio_base;
824 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
829 ahci_stop_engine(port_mmio);
831 /* clear D2H reception area to properly wait for D2H FIS */
832 ata_tf_init(ap->device, &tf);
834 ata_tf_to_fis(&tf, d2h_fis, 0);
836 rc = sata_std_hardreset(ap, class);
838 ahci_start_engine(port_mmio);
840 if (rc == 0 && ata_port_online(ap))
841 *class = ahci_dev_classify(ap);
842 if (*class == ATA_DEV_UNKNOWN)
843 *class = ATA_DEV_NONE;
845 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
849 static void ahci_postreset(struct ata_port *ap, unsigned int *class)
851 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
854 ata_std_postreset(ap, class);
856 /* Make sure port's ATAPI bit is set appropriately */
857 new_tmp = tmp = readl(port_mmio + PORT_CMD);
858 if (*class == ATA_DEV_ATAPI)
859 new_tmp |= PORT_CMD_ATAPI;
861 new_tmp &= ~PORT_CMD_ATAPI;
862 if (new_tmp != tmp) {
863 writel(new_tmp, port_mmio + PORT_CMD);
864 readl(port_mmio + PORT_CMD); /* flush */
868 static u8 ahci_check_status(struct ata_port *ap)
870 void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr;
872 return readl(mmio + PORT_TFDATA) & 0xFF;
875 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
877 struct ahci_port_priv *pp = ap->private_data;
878 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
880 ata_tf_from_fis(d2h_fis, tf);
883 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
885 struct scatterlist *sg;
886 struct ahci_sg *ahci_sg;
887 unsigned int n_sg = 0;
892 * Next, the S/G list.
894 ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
895 ata_for_each_sg(sg, qc) {
896 dma_addr_t addr = sg_dma_address(sg);
897 u32 sg_len = sg_dma_len(sg);
899 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
900 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
901 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
910 static void ahci_qc_prep(struct ata_queued_cmd *qc)
912 struct ata_port *ap = qc->ap;
913 struct ahci_port_priv *pp = ap->private_data;
914 int is_atapi = is_atapi_taskfile(&qc->tf);
917 const u32 cmd_fis_len = 5; /* five dwords */
921 * Fill in command table information. First, the header,
922 * a SATA Register - Host to Device command FIS.
924 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
926 ata_tf_to_fis(&qc->tf, cmd_tbl, 0);
928 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
929 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
933 if (qc->flags & ATA_QCFLAG_DMAMAP)
934 n_elem = ahci_fill_sg(qc, cmd_tbl);
937 * Fill in command slot information.
939 opts = cmd_fis_len | n_elem << 16;
940 if (qc->tf.flags & ATA_TFLAG_WRITE)
941 opts |= AHCI_CMD_WRITE;
943 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
945 ahci_fill_cmd_slot(pp, qc->tag, opts);
948 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
950 struct ahci_port_priv *pp = ap->private_data;
951 struct ata_eh_info *ehi = &ap->eh_info;
952 unsigned int err_mask = 0, action = 0;
953 struct ata_queued_cmd *qc;
956 ata_ehi_clear_desc(ehi);
958 /* AHCI needs SError cleared; otherwise, it might lock up */
959 serror = ahci_scr_read(ap, SCR_ERROR);
960 ahci_scr_write(ap, SCR_ERROR, serror);
962 /* analyze @irq_stat */
963 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
965 if (irq_stat & PORT_IRQ_TF_ERR)
966 err_mask |= AC_ERR_DEV;
968 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
969 err_mask |= AC_ERR_HOST_BUS;
970 action |= ATA_EH_SOFTRESET;
973 if (irq_stat & PORT_IRQ_IF_ERR) {
974 err_mask |= AC_ERR_ATA_BUS;
975 action |= ATA_EH_SOFTRESET;
976 ata_ehi_push_desc(ehi, ", interface fatal error");
979 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
980 ata_ehi_hotplugged(ehi);
981 ata_ehi_push_desc(ehi, ", %s", irq_stat & PORT_IRQ_CONNECT ?
982 "connection status changed" : "PHY RDY changed");
985 if (irq_stat & PORT_IRQ_UNK_FIS) {
986 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
988 err_mask |= AC_ERR_HSM;
989 action |= ATA_EH_SOFTRESET;
990 ata_ehi_push_desc(ehi, ", unknown FIS %08x %08x %08x %08x",
991 unk[0], unk[1], unk[2], unk[3]);
994 /* okay, let's hand over to EH */
995 ehi->serror |= serror;
996 ehi->action |= action;
998 qc = ata_qc_from_tag(ap, ap->active_tag);
1000 qc->err_mask |= err_mask;
1002 ehi->err_mask |= err_mask;
1004 if (irq_stat & PORT_IRQ_FREEZE)
1005 ata_port_freeze(ap);
1010 static void ahci_host_intr(struct ata_port *ap)
1012 void __iomem *mmio = ap->host->mmio_base;
1013 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1014 struct ata_eh_info *ehi = &ap->eh_info;
1015 u32 status, qc_active;
1018 status = readl(port_mmio + PORT_IRQ_STAT);
1019 writel(status, port_mmio + PORT_IRQ_STAT);
1021 if (unlikely(status & PORT_IRQ_ERROR)) {
1022 ahci_error_intr(ap, status);
1027 qc_active = readl(port_mmio + PORT_SCR_ACT);
1029 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1031 rc = ata_qc_complete_multiple(ap, qc_active, NULL);
1035 ehi->err_mask |= AC_ERR_HSM;
1036 ehi->action |= ATA_EH_SOFTRESET;
1037 ata_port_freeze(ap);
1041 /* hmmm... a spurious interupt */
1043 /* some devices send D2H reg with I bit set during NCQ command phase */
1044 if (ap->sactive && status & PORT_IRQ_D2H_REG_FIS)
1047 /* ignore interim PIO setup fis interrupts */
1048 if (ata_tag_valid(ap->active_tag) && (status & PORT_IRQ_PIOS_FIS))
1051 if (ata_ratelimit())
1052 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
1053 "(irq_stat 0x%x active_tag %d sactive 0x%x)\n",
1054 status, ap->active_tag, ap->sactive);
1057 static void ahci_irq_clear(struct ata_port *ap)
1062 static irqreturn_t ahci_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
1064 struct ata_host *host = dev_instance;
1065 struct ahci_host_priv *hpriv;
1066 unsigned int i, handled = 0;
1068 u32 irq_stat, irq_ack = 0;
1072 hpriv = host->private_data;
1073 mmio = host->mmio_base;
1075 /* sigh. 0xffffffff is a valid return from h/w */
1076 irq_stat = readl(mmio + HOST_IRQ_STAT);
1077 irq_stat &= hpriv->port_map;
1081 spin_lock(&host->lock);
1083 for (i = 0; i < host->n_ports; i++) {
1084 struct ata_port *ap;
1086 if (!(irq_stat & (1 << i)))
1089 ap = host->ports[i];
1092 VPRINTK("port %u\n", i);
1094 VPRINTK("port %u (no irq)\n", i);
1095 if (ata_ratelimit())
1096 dev_printk(KERN_WARNING, host->dev,
1097 "interrupt on disabled port %u\n", i);
1100 irq_ack |= (1 << i);
1104 writel(irq_ack, mmio + HOST_IRQ_STAT);
1108 spin_unlock(&host->lock);
1112 return IRQ_RETVAL(handled);
1115 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1117 struct ata_port *ap = qc->ap;
1118 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
1120 if (qc->tf.protocol == ATA_PROT_NCQ)
1121 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1122 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1123 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1128 static void ahci_freeze(struct ata_port *ap)
1130 void __iomem *mmio = ap->host->mmio_base;
1131 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1134 writel(0, port_mmio + PORT_IRQ_MASK);
1137 static void ahci_thaw(struct ata_port *ap)
1139 void __iomem *mmio = ap->host->mmio_base;
1140 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1144 tmp = readl(port_mmio + PORT_IRQ_STAT);
1145 writel(tmp, port_mmio + PORT_IRQ_STAT);
1146 writel(1 << ap->id, mmio + HOST_IRQ_STAT);
1148 /* turn IRQ back on */
1149 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
1152 static void ahci_error_handler(struct ata_port *ap)
1154 void __iomem *mmio = ap->host->mmio_base;
1155 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1157 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1158 /* restart engine */
1159 ahci_stop_engine(port_mmio);
1160 ahci_start_engine(port_mmio);
1163 /* perform recovery */
1164 ata_do_eh(ap, ahci_prereset, ahci_softreset, ahci_hardreset,
1168 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1170 struct ata_port *ap = qc->ap;
1171 void __iomem *mmio = ap->host->mmio_base;
1172 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1174 if (qc->flags & ATA_QCFLAG_FAILED)
1175 qc->err_mask |= AC_ERR_OTHER;
1178 /* make DMA engine forget about the failed command */
1179 ahci_stop_engine(port_mmio);
1180 ahci_start_engine(port_mmio);
1184 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
1186 struct ahci_host_priv *hpriv = ap->host->private_data;
1187 struct ahci_port_priv *pp = ap->private_data;
1188 void __iomem *mmio = ap->host->mmio_base;
1189 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1190 const char *emsg = NULL;
1193 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
1195 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
1196 ahci_init_port(port_mmio, hpriv->cap,
1197 pp->cmd_slot_dma, pp->rx_fis_dma);
1203 static int ahci_port_resume(struct ata_port *ap)
1205 struct ahci_port_priv *pp = ap->private_data;
1206 struct ahci_host_priv *hpriv = ap->host->private_data;
1207 void __iomem *mmio = ap->host->mmio_base;
1208 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1210 ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
1215 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1217 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1218 void __iomem *mmio = host->mmio_base;
1221 if (mesg.event == PM_EVENT_SUSPEND) {
1222 /* AHCI spec rev1.1 section 8.3.3:
1223 * Software must disable interrupts prior to requesting a
1224 * transition of the HBA to D3 state.
1226 ctl = readl(mmio + HOST_CTL);
1227 ctl &= ~HOST_IRQ_EN;
1228 writel(ctl, mmio + HOST_CTL);
1229 readl(mmio + HOST_CTL); /* flush */
1232 return ata_pci_device_suspend(pdev, mesg);
1235 static int ahci_pci_device_resume(struct pci_dev *pdev)
1237 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1238 struct ahci_host_priv *hpriv = host->private_data;
1239 void __iomem *mmio = host->mmio_base;
1242 ata_pci_device_do_resume(pdev);
1244 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
1245 rc = ahci_reset_controller(mmio, pdev);
1249 ahci_init_controller(mmio, pdev, host->n_ports, hpriv->cap);
1252 ata_host_resume(host);
1257 static int ahci_port_start(struct ata_port *ap)
1259 struct device *dev = ap->host->dev;
1260 struct ahci_host_priv *hpriv = ap->host->private_data;
1261 struct ahci_port_priv *pp;
1262 void __iomem *mmio = ap->host->mmio_base;
1263 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1268 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
1271 memset(pp, 0, sizeof(*pp));
1273 rc = ata_pad_alloc(ap, dev);
1279 mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);
1281 ata_pad_free(ap, dev);
1285 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
1288 * First item in chunk of DMA memory: 32-slot command table,
1289 * 32 bytes each in size
1292 pp->cmd_slot_dma = mem_dma;
1294 mem += AHCI_CMD_SLOT_SZ;
1295 mem_dma += AHCI_CMD_SLOT_SZ;
1298 * Second item: Received-FIS area
1301 pp->rx_fis_dma = mem_dma;
1303 mem += AHCI_RX_FIS_SZ;
1304 mem_dma += AHCI_RX_FIS_SZ;
1307 * Third item: data area for storing a single command
1308 * and its scatter-gather table
1311 pp->cmd_tbl_dma = mem_dma;
1313 ap->private_data = pp;
1315 /* initialize port */
1316 ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
1321 static void ahci_port_stop(struct ata_port *ap)
1323 struct device *dev = ap->host->dev;
1324 struct ahci_host_priv *hpriv = ap->host->private_data;
1325 struct ahci_port_priv *pp = ap->private_data;
1326 void __iomem *mmio = ap->host->mmio_base;
1327 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1328 const char *emsg = NULL;
1331 /* de-initialize port */
1332 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
1334 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
1336 ap->private_data = NULL;
1337 dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,
1338 pp->cmd_slot, pp->cmd_slot_dma);
1339 ata_pad_free(ap, dev);
1343 static void ahci_setup_port(struct ata_ioports *port, unsigned long base,
1344 unsigned int port_idx)
1346 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
1347 base = ahci_port_base_ul(base, port_idx);
1348 VPRINTK("base now==0x%lx\n", base);
1350 port->cmd_addr = base;
1351 port->scr_addr = base + PORT_SCR;
1356 static int ahci_host_init(struct ata_probe_ent *probe_ent)
1358 struct ahci_host_priv *hpriv = probe_ent->private_data;
1359 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1360 void __iomem *mmio = probe_ent->mmio_base;
1361 unsigned int i, using_dac;
1364 rc = ahci_reset_controller(mmio, pdev);
1368 hpriv->cap = readl(mmio + HOST_CAP);
1369 hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
1370 probe_ent->n_ports = (hpriv->cap & 0x1f) + 1;
1372 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
1373 hpriv->cap, hpriv->port_map, probe_ent->n_ports);
1375 using_dac = hpriv->cap & HOST_CAP_64;
1377 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1378 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1380 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1382 dev_printk(KERN_ERR, &pdev->dev,
1383 "64-bit DMA enable failed\n");
1388 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1390 dev_printk(KERN_ERR, &pdev->dev,
1391 "32-bit DMA enable failed\n");
1394 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1396 dev_printk(KERN_ERR, &pdev->dev,
1397 "32-bit consistent DMA enable failed\n");
1402 for (i = 0; i < probe_ent->n_ports; i++)
1403 ahci_setup_port(&probe_ent->port[i], (unsigned long) mmio, i);
1405 ahci_init_controller(mmio, pdev, probe_ent->n_ports, hpriv->cap);
1407 pci_set_master(pdev);
1412 static void ahci_print_info(struct ata_probe_ent *probe_ent)
1414 struct ahci_host_priv *hpriv = probe_ent->private_data;
1415 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1416 void __iomem *mmio = probe_ent->mmio_base;
1417 u32 vers, cap, impl, speed;
1418 const char *speed_s;
1422 vers = readl(mmio + HOST_VERSION);
1424 impl = hpriv->port_map;
1426 speed = (cap >> 20) & 0xf;
1429 else if (speed == 2)
1434 pci_read_config_word(pdev, 0x0a, &cc);
1437 else if (cc == 0x0106)
1439 else if (cc == 0x0104)
1444 dev_printk(KERN_INFO, &pdev->dev,
1445 "AHCI %02x%02x.%02x%02x "
1446 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1449 (vers >> 24) & 0xff,
1450 (vers >> 16) & 0xff,
1454 ((cap >> 8) & 0x1f) + 1,
1460 dev_printk(KERN_INFO, &pdev->dev,
1466 cap & (1 << 31) ? "64bit " : "",
1467 cap & (1 << 30) ? "ncq " : "",
1468 cap & (1 << 28) ? "ilck " : "",
1469 cap & (1 << 27) ? "stag " : "",
1470 cap & (1 << 26) ? "pm " : "",
1471 cap & (1 << 25) ? "led " : "",
1473 cap & (1 << 24) ? "clo " : "",
1474 cap & (1 << 19) ? "nz " : "",
1475 cap & (1 << 18) ? "only " : "",
1476 cap & (1 << 17) ? "pmp " : "",
1477 cap & (1 << 15) ? "pio " : "",
1478 cap & (1 << 14) ? "slum " : "",
1479 cap & (1 << 13) ? "part " : ""
1483 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1485 static int printed_version;
1486 struct ata_probe_ent *probe_ent = NULL;
1487 struct ahci_host_priv *hpriv;
1489 void __iomem *mmio_base;
1490 unsigned int board_idx = (unsigned int) ent->driver_data;
1491 int have_msi, pci_dev_busy = 0;
1496 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
1498 if (!printed_version++)
1499 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1501 /* JMicron-specific fixup: make sure we're in AHCI mode */
1502 /* This is protected from races with ata_jmicron by the pci probe
1504 if (pdev->vendor == PCI_VENDOR_ID_JMICRON) {
1505 /* AHCI enable, AHCI on function 0 */
1506 pci_write_config_byte(pdev, 0x41, 0xa1);
1507 /* Function 1 is the PATA controller */
1508 if (PCI_FUNC(pdev->devfn))
1512 rc = pci_enable_device(pdev);
1516 rc = pci_request_regions(pdev, DRV_NAME);
1522 if (pci_enable_msi(pdev) == 0)
1529 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
1530 if (probe_ent == NULL) {
1535 memset(probe_ent, 0, sizeof(*probe_ent));
1536 probe_ent->dev = pci_dev_to_dev(pdev);
1537 INIT_LIST_HEAD(&probe_ent->node);
1539 mmio_base = pci_iomap(pdev, AHCI_PCI_BAR, 0);
1540 if (mmio_base == NULL) {
1542 goto err_out_free_ent;
1544 base = (unsigned long) mmio_base;
1546 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1549 goto err_out_iounmap;
1551 memset(hpriv, 0, sizeof(*hpriv));
1553 probe_ent->sht = ahci_port_info[board_idx].sht;
1554 probe_ent->port_flags = ahci_port_info[board_idx].flags;
1555 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
1556 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
1557 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
1559 probe_ent->irq = pdev->irq;
1560 probe_ent->irq_flags = IRQF_SHARED;
1561 probe_ent->mmio_base = mmio_base;
1562 probe_ent->private_data = hpriv;
1565 hpriv->flags |= AHCI_FLAG_MSI;
1567 /* initialize adapter */
1568 rc = ahci_host_init(probe_ent);
1572 if (!(probe_ent->port_flags & AHCI_FLAG_NO_NCQ) &&
1573 (hpriv->cap & HOST_CAP_NCQ))
1574 probe_ent->port_flags |= ATA_FLAG_NCQ;
1576 ahci_print_info(probe_ent);
1578 /* FIXME: check ata_device_add return value */
1579 ata_device_add(probe_ent);
1587 pci_iounmap(pdev, mmio_base);
1592 pci_disable_msi(pdev);
1595 pci_release_regions(pdev);
1598 pci_disable_device(pdev);
1602 static void ahci_remove_one (struct pci_dev *pdev)
1604 struct device *dev = pci_dev_to_dev(pdev);
1605 struct ata_host *host = dev_get_drvdata(dev);
1606 struct ahci_host_priv *hpriv = host->private_data;
1610 for (i = 0; i < host->n_ports; i++)
1611 ata_port_detach(host->ports[i]);
1613 have_msi = hpriv->flags & AHCI_FLAG_MSI;
1614 free_irq(host->irq, host);
1616 for (i = 0; i < host->n_ports; i++) {
1617 struct ata_port *ap = host->ports[i];
1619 ata_scsi_release(ap->scsi_host);
1620 scsi_host_put(ap->scsi_host);
1624 pci_iounmap(pdev, host->mmio_base);
1628 pci_disable_msi(pdev);
1631 pci_release_regions(pdev);
1632 pci_disable_device(pdev);
1633 dev_set_drvdata(dev, NULL);
1636 static int __init ahci_init(void)
1638 return pci_register_driver(&ahci_pci_driver);
1641 static void __exit ahci_exit(void)
1643 pci_unregister_driver(&ahci_pci_driver);
1647 MODULE_AUTHOR("Jeff Garzik");
1648 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1649 MODULE_LICENSE("GPL");
1650 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1651 MODULE_VERSION(DRV_VERSION);
1653 module_init(ahci_init);
1654 module_exit(ahci_exit);