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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/scsi/ahci.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/scsi/ahci.c')
-rw-r--r--drivers/scsi/ahci.c1065
1 files changed, 1065 insertions, 0 deletions
diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
new file mode 100644
index 000000000000..3a15b13e747a
--- /dev/null
+++ b/drivers/scsi/ahci.c
@@ -0,0 +1,1065 @@
1/*
2 * ahci.c - AHCI SATA support
3 *
4 * Copyright 2004 Red Hat, Inc.
5 *
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
9 * by reference.
10 *
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.
21 *
22 * Version 1.0 of the AHCI specification:
23 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
24 *
25 */
26
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 "scsi.h"
36#include <scsi/scsi_host.h>
37#include <linux/libata.h>
38#include <asm/io.h>
39
40#define DRV_NAME "ahci"
41#define DRV_VERSION "1.00"
42
43
44enum {
45 AHCI_PCI_BAR = 5,
46 AHCI_MAX_SG = 168, /* hardware max is 64K */
47 AHCI_DMA_BOUNDARY = 0xffffffff,
48 AHCI_USE_CLUSTERING = 0,
49 AHCI_CMD_SLOT_SZ = 32 * 32,
50 AHCI_RX_FIS_SZ = 256,
51 AHCI_CMD_TBL_HDR = 0x80,
52 AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR + (AHCI_MAX_SG * 16),
53 AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ +
54 AHCI_RX_FIS_SZ,
55 AHCI_IRQ_ON_SG = (1 << 31),
56 AHCI_CMD_ATAPI = (1 << 5),
57 AHCI_CMD_WRITE = (1 << 6),
58
59 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
60
61 board_ahci = 0,
62
63 /* global controller registers */
64 HOST_CAP = 0x00, /* host capabilities */
65 HOST_CTL = 0x04, /* global host control */
66 HOST_IRQ_STAT = 0x08, /* interrupt status */
67 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
68 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
69
70 /* HOST_CTL bits */
71 HOST_RESET = (1 << 0), /* reset controller; self-clear */
72 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
73 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
74
75 /* HOST_CAP bits */
76 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
77
78 /* registers for each SATA port */
79 PORT_LST_ADDR = 0x00, /* command list DMA addr */
80 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
81 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
82 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
83 PORT_IRQ_STAT = 0x10, /* interrupt status */
84 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
85 PORT_CMD = 0x18, /* port command */
86 PORT_TFDATA = 0x20, /* taskfile data */
87 PORT_SIG = 0x24, /* device TF signature */
88 PORT_CMD_ISSUE = 0x38, /* command issue */
89 PORT_SCR = 0x28, /* SATA phy register block */
90 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
91 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
92 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
93 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
94
95 /* PORT_IRQ_{STAT,MASK} bits */
96 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
97 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
98 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
99 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
100 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
101 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
102 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
103 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
104
105 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
106 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
107 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
108 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
109 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
110 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
111 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
112 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
113 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
114
115 PORT_IRQ_FATAL = PORT_IRQ_TF_ERR |
116 PORT_IRQ_HBUS_ERR |
117 PORT_IRQ_HBUS_DATA_ERR |
118 PORT_IRQ_IF_ERR,
119 DEF_PORT_IRQ = PORT_IRQ_FATAL | PORT_IRQ_PHYRDY |
120 PORT_IRQ_CONNECT | PORT_IRQ_SG_DONE |
121 PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_FIS |
122 PORT_IRQ_DMAS_FIS | PORT_IRQ_PIOS_FIS |
123 PORT_IRQ_D2H_REG_FIS,
124
125 /* PORT_CMD bits */
126 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
127 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
128 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
129 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
130 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
131 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
132
133 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
134 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
135 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
136};
137
138struct ahci_cmd_hdr {
139 u32 opts;
140 u32 status;
141 u32 tbl_addr;
142 u32 tbl_addr_hi;
143 u32 reserved[4];
144};
145
146struct ahci_sg {
147 u32 addr;
148 u32 addr_hi;
149 u32 reserved;
150 u32 flags_size;
151};
152
153struct ahci_host_priv {
154 unsigned long flags;
155 u32 cap; /* cache of HOST_CAP register */
156 u32 port_map; /* cache of HOST_PORTS_IMPL reg */
157};
158
159struct ahci_port_priv {
160 struct ahci_cmd_hdr *cmd_slot;
161 dma_addr_t cmd_slot_dma;
162 void *cmd_tbl;
163 dma_addr_t cmd_tbl_dma;
164 struct ahci_sg *cmd_tbl_sg;
165 void *rx_fis;
166 dma_addr_t rx_fis_dma;
167};
168
169static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
170static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
171static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
172static int ahci_qc_issue(struct ata_queued_cmd *qc);
173static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
174static void ahci_phy_reset(struct ata_port *ap);
175static void ahci_irq_clear(struct ata_port *ap);
176static void ahci_eng_timeout(struct ata_port *ap);
177static int ahci_port_start(struct ata_port *ap);
178static void ahci_port_stop(struct ata_port *ap);
179static void ahci_host_stop(struct ata_host_set *host_set);
180static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
181static void ahci_qc_prep(struct ata_queued_cmd *qc);
182static u8 ahci_check_status(struct ata_port *ap);
183static u8 ahci_check_err(struct ata_port *ap);
184static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
185
186static Scsi_Host_Template ahci_sht = {
187 .module = THIS_MODULE,
188 .name = DRV_NAME,
189 .ioctl = ata_scsi_ioctl,
190 .queuecommand = ata_scsi_queuecmd,
191 .eh_strategy_handler = ata_scsi_error,
192 .can_queue = ATA_DEF_QUEUE,
193 .this_id = ATA_SHT_THIS_ID,
194 .sg_tablesize = AHCI_MAX_SG,
195 .max_sectors = ATA_MAX_SECTORS,
196 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
197 .emulated = ATA_SHT_EMULATED,
198 .use_clustering = AHCI_USE_CLUSTERING,
199 .proc_name = DRV_NAME,
200 .dma_boundary = AHCI_DMA_BOUNDARY,
201 .slave_configure = ata_scsi_slave_config,
202 .bios_param = ata_std_bios_param,
203 .ordered_flush = 1,
204};
205
206static struct ata_port_operations ahci_ops = {
207 .port_disable = ata_port_disable,
208
209 .check_status = ahci_check_status,
210 .check_altstatus = ahci_check_status,
211 .check_err = ahci_check_err,
212 .dev_select = ata_noop_dev_select,
213
214 .tf_read = ahci_tf_read,
215
216 .phy_reset = ahci_phy_reset,
217
218 .qc_prep = ahci_qc_prep,
219 .qc_issue = ahci_qc_issue,
220
221 .eng_timeout = ahci_eng_timeout,
222
223 .irq_handler = ahci_interrupt,
224 .irq_clear = ahci_irq_clear,
225
226 .scr_read = ahci_scr_read,
227 .scr_write = ahci_scr_write,
228
229 .port_start = ahci_port_start,
230 .port_stop = ahci_port_stop,
231 .host_stop = ahci_host_stop,
232};
233
234static struct ata_port_info ahci_port_info[] = {
235 /* board_ahci */
236 {
237 .sht = &ahci_sht,
238 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
239 ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
240 ATA_FLAG_PIO_DMA,
241 .pio_mask = 0x03, /* pio3-4 */
242 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
243 .port_ops = &ahci_ops,
244 },
245};
246
247static struct pci_device_id ahci_pci_tbl[] = {
248 { PCI_VENDOR_ID_INTEL, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
249 board_ahci }, /* ICH6 */
250 { PCI_VENDOR_ID_INTEL, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
251 board_ahci }, /* ICH6M */
252 { PCI_VENDOR_ID_INTEL, 0x27c1, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
253 board_ahci }, /* ICH7 */
254 { PCI_VENDOR_ID_INTEL, 0x27c5, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
255 board_ahci }, /* ICH7M */
256 { PCI_VENDOR_ID_INTEL, 0x27c3, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
257 board_ahci }, /* ICH7R */
258 { PCI_VENDOR_ID_AL, 0x5288, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
259 board_ahci }, /* ULi M5288 */
260 { } /* terminate list */
261};
262
263
264static struct pci_driver ahci_pci_driver = {
265 .name = DRV_NAME,
266 .id_table = ahci_pci_tbl,
267 .probe = ahci_init_one,
268 .remove = ata_pci_remove_one,
269};
270
271
272static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port)
273{
274 return base + 0x100 + (port * 0x80);
275}
276
277static inline void *ahci_port_base (void *base, unsigned int port)
278{
279 return (void *) ahci_port_base_ul((unsigned long)base, port);
280}
281
282static void ahci_host_stop(struct ata_host_set *host_set)
283{
284 struct ahci_host_priv *hpriv = host_set->private_data;
285 kfree(hpriv);
286}
287
288static int ahci_port_start(struct ata_port *ap)
289{
290 struct device *dev = ap->host_set->dev;
291 struct ahci_host_priv *hpriv = ap->host_set->private_data;
292 struct ahci_port_priv *pp;
293 int rc;
294 void *mem, *mmio = ap->host_set->mmio_base;
295 void *port_mmio = ahci_port_base(mmio, ap->port_no);
296 dma_addr_t mem_dma;
297
298 rc = ata_port_start(ap);
299 if (rc)
300 return rc;
301
302 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
303 if (!pp) {
304 rc = -ENOMEM;
305 goto err_out;
306 }
307 memset(pp, 0, sizeof(*pp));
308
309 mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);
310 if (!mem) {
311 rc = -ENOMEM;
312 goto err_out_kfree;
313 }
314 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
315
316 /*
317 * First item in chunk of DMA memory: 32-slot command table,
318 * 32 bytes each in size
319 */
320 pp->cmd_slot = mem;
321 pp->cmd_slot_dma = mem_dma;
322
323 mem += AHCI_CMD_SLOT_SZ;
324 mem_dma += AHCI_CMD_SLOT_SZ;
325
326 /*
327 * Second item: Received-FIS area
328 */
329 pp->rx_fis = mem;
330 pp->rx_fis_dma = mem_dma;
331
332 mem += AHCI_RX_FIS_SZ;
333 mem_dma += AHCI_RX_FIS_SZ;
334
335 /*
336 * Third item: data area for storing a single command
337 * and its scatter-gather table
338 */
339 pp->cmd_tbl = mem;
340 pp->cmd_tbl_dma = mem_dma;
341
342 pp->cmd_tbl_sg = mem + AHCI_CMD_TBL_HDR;
343
344 ap->private_data = pp;
345
346 if (hpriv->cap & HOST_CAP_64)
347 writel((pp->cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
348 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
349 readl(port_mmio + PORT_LST_ADDR); /* flush */
350
351 if (hpriv->cap & HOST_CAP_64)
352 writel((pp->rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
353 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
354 readl(port_mmio + PORT_FIS_ADDR); /* flush */
355
356 writel(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX |
357 PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP |
358 PORT_CMD_START, port_mmio + PORT_CMD);
359 readl(port_mmio + PORT_CMD); /* flush */
360
361 return 0;
362
363err_out_kfree:
364 kfree(pp);
365err_out:
366 ata_port_stop(ap);
367 return rc;
368}
369
370
371static void ahci_port_stop(struct ata_port *ap)
372{
373 struct device *dev = ap->host_set->dev;
374 struct ahci_port_priv *pp = ap->private_data;
375 void *mmio = ap->host_set->mmio_base;
376 void *port_mmio = ahci_port_base(mmio, ap->port_no);
377 u32 tmp;
378
379 tmp = readl(port_mmio + PORT_CMD);
380 tmp &= ~(PORT_CMD_START | PORT_CMD_FIS_RX);
381 writel(tmp, port_mmio + PORT_CMD);
382 readl(port_mmio + PORT_CMD); /* flush */
383
384 /* spec says 500 msecs for each PORT_CMD_{START,FIS_RX} bit, so
385 * this is slightly incorrect.
386 */
387 msleep(500);
388
389 ap->private_data = NULL;
390 dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,
391 pp->cmd_slot, pp->cmd_slot_dma);
392 kfree(pp);
393 ata_port_stop(ap);
394}
395
396static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
397{
398 unsigned int sc_reg;
399
400 switch (sc_reg_in) {
401 case SCR_STATUS: sc_reg = 0; break;
402 case SCR_CONTROL: sc_reg = 1; break;
403 case SCR_ERROR: sc_reg = 2; break;
404 case SCR_ACTIVE: sc_reg = 3; break;
405 default:
406 return 0xffffffffU;
407 }
408
409 return readl((void *) ap->ioaddr.scr_addr + (sc_reg * 4));
410}
411
412
413static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
414 u32 val)
415{
416 unsigned int sc_reg;
417
418 switch (sc_reg_in) {
419 case SCR_STATUS: sc_reg = 0; break;
420 case SCR_CONTROL: sc_reg = 1; break;
421 case SCR_ERROR: sc_reg = 2; break;
422 case SCR_ACTIVE: sc_reg = 3; break;
423 default:
424 return;
425 }
426
427 writel(val, (void *) ap->ioaddr.scr_addr + (sc_reg * 4));
428}
429
430static void ahci_phy_reset(struct ata_port *ap)
431{
432 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
433 struct ata_taskfile tf;
434 struct ata_device *dev = &ap->device[0];
435 u32 tmp;
436
437 __sata_phy_reset(ap);
438
439 if (ap->flags & ATA_FLAG_PORT_DISABLED)
440 return;
441
442 tmp = readl(port_mmio + PORT_SIG);
443 tf.lbah = (tmp >> 24) & 0xff;
444 tf.lbam = (tmp >> 16) & 0xff;
445 tf.lbal = (tmp >> 8) & 0xff;
446 tf.nsect = (tmp) & 0xff;
447
448 dev->class = ata_dev_classify(&tf);
449 if (!ata_dev_present(dev))
450 ata_port_disable(ap);
451}
452
453static u8 ahci_check_status(struct ata_port *ap)
454{
455 void *mmio = (void *) ap->ioaddr.cmd_addr;
456
457 return readl(mmio + PORT_TFDATA) & 0xFF;
458}
459
460static u8 ahci_check_err(struct ata_port *ap)
461{
462 void *mmio = (void *) ap->ioaddr.cmd_addr;
463
464 return (readl(mmio + PORT_TFDATA) >> 8) & 0xFF;
465}
466
467static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
468{
469 struct ahci_port_priv *pp = ap->private_data;
470 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
471
472 ata_tf_from_fis(d2h_fis, tf);
473}
474
475static void ahci_fill_sg(struct ata_queued_cmd *qc)
476{
477 struct ahci_port_priv *pp = qc->ap->private_data;
478 unsigned int i;
479
480 VPRINTK("ENTER\n");
481
482 /*
483 * Next, the S/G list.
484 */
485 for (i = 0; i < qc->n_elem; i++) {
486 u32 sg_len;
487 dma_addr_t addr;
488
489 addr = sg_dma_address(&qc->sg[i]);
490 sg_len = sg_dma_len(&qc->sg[i]);
491
492 pp->cmd_tbl_sg[i].addr = cpu_to_le32(addr & 0xffffffff);
493 pp->cmd_tbl_sg[i].addr_hi = cpu_to_le32((addr >> 16) >> 16);
494 pp->cmd_tbl_sg[i].flags_size = cpu_to_le32(sg_len - 1);
495 }
496}
497
498static void ahci_qc_prep(struct ata_queued_cmd *qc)
499{
500 struct ahci_port_priv *pp = qc->ap->private_data;
501 u32 opts;
502 const u32 cmd_fis_len = 5; /* five dwords */
503
504 /*
505 * Fill in command slot information (currently only one slot,
506 * slot 0, is currently since we don't do queueing)
507 */
508
509 opts = (qc->n_elem << 16) | cmd_fis_len;
510 if (qc->tf.flags & ATA_TFLAG_WRITE)
511 opts |= AHCI_CMD_WRITE;
512
513 switch (qc->tf.protocol) {
514 case ATA_PROT_ATAPI:
515 case ATA_PROT_ATAPI_NODATA:
516 case ATA_PROT_ATAPI_DMA:
517 opts |= AHCI_CMD_ATAPI;
518 break;
519
520 default:
521 /* do nothing */
522 break;
523 }
524
525 pp->cmd_slot[0].opts = cpu_to_le32(opts);
526 pp->cmd_slot[0].status = 0;
527 pp->cmd_slot[0].tbl_addr = cpu_to_le32(pp->cmd_tbl_dma & 0xffffffff);
528 pp->cmd_slot[0].tbl_addr_hi = cpu_to_le32((pp->cmd_tbl_dma >> 16) >> 16);
529
530 /*
531 * Fill in command table information. First, the header,
532 * a SATA Register - Host to Device command FIS.
533 */
534 ata_tf_to_fis(&qc->tf, pp->cmd_tbl, 0);
535
536 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
537 return;
538
539 ahci_fill_sg(qc);
540}
541
542static void ahci_intr_error(struct ata_port *ap, u32 irq_stat)
543{
544 void *mmio = ap->host_set->mmio_base;
545 void *port_mmio = ahci_port_base(mmio, ap->port_no);
546 u32 tmp;
547 int work;
548
549 /* stop DMA */
550 tmp = readl(port_mmio + PORT_CMD);
551 tmp &= ~PORT_CMD_START;
552 writel(tmp, port_mmio + PORT_CMD);
553
554 /* wait for engine to stop. TODO: this could be
555 * as long as 500 msec
556 */
557 work = 1000;
558 while (work-- > 0) {
559 tmp = readl(port_mmio + PORT_CMD);
560 if ((tmp & PORT_CMD_LIST_ON) == 0)
561 break;
562 udelay(10);
563 }
564
565 /* clear SATA phy error, if any */
566 tmp = readl(port_mmio + PORT_SCR_ERR);
567 writel(tmp, port_mmio + PORT_SCR_ERR);
568
569 /* if DRQ/BSY is set, device needs to be reset.
570 * if so, issue COMRESET
571 */
572 tmp = readl(port_mmio + PORT_TFDATA);
573 if (tmp & (ATA_BUSY | ATA_DRQ)) {
574 writel(0x301, port_mmio + PORT_SCR_CTL);
575 readl(port_mmio + PORT_SCR_CTL); /* flush */
576 udelay(10);
577 writel(0x300, port_mmio + PORT_SCR_CTL);
578 readl(port_mmio + PORT_SCR_CTL); /* flush */
579 }
580
581 /* re-start DMA */
582 tmp = readl(port_mmio + PORT_CMD);
583 tmp |= PORT_CMD_START;
584 writel(tmp, port_mmio + PORT_CMD);
585 readl(port_mmio + PORT_CMD); /* flush */
586
587 printk(KERN_WARNING "ata%u: error occurred, port reset\n", ap->id);
588}
589
590static void ahci_eng_timeout(struct ata_port *ap)
591{
592 void *mmio = ap->host_set->mmio_base;
593 void *port_mmio = ahci_port_base(mmio, ap->port_no);
594 struct ata_queued_cmd *qc;
595
596 DPRINTK("ENTER\n");
597
598 ahci_intr_error(ap, readl(port_mmio + PORT_IRQ_STAT));
599
600 qc = ata_qc_from_tag(ap, ap->active_tag);
601 if (!qc) {
602 printk(KERN_ERR "ata%u: BUG: timeout without command\n",
603 ap->id);
604 } else {
605 /* hack alert! We cannot use the supplied completion
606 * function from inside the ->eh_strategy_handler() thread.
607 * libata is the only user of ->eh_strategy_handler() in
608 * any kernel, so the default scsi_done() assumes it is
609 * not being called from the SCSI EH.
610 */
611 qc->scsidone = scsi_finish_command;
612 ata_qc_complete(qc, ATA_ERR);
613 }
614
615}
616
617static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
618{
619 void *mmio = ap->host_set->mmio_base;
620 void *port_mmio = ahci_port_base(mmio, ap->port_no);
621 u32 status, serr, ci;
622
623 serr = readl(port_mmio + PORT_SCR_ERR);
624 writel(serr, port_mmio + PORT_SCR_ERR);
625
626 status = readl(port_mmio + PORT_IRQ_STAT);
627 writel(status, port_mmio + PORT_IRQ_STAT);
628
629 ci = readl(port_mmio + PORT_CMD_ISSUE);
630 if (likely((ci & 0x1) == 0)) {
631 if (qc) {
632 ata_qc_complete(qc, 0);
633 qc = NULL;
634 }
635 }
636
637 if (status & PORT_IRQ_FATAL) {
638 ahci_intr_error(ap, status);
639 if (qc)
640 ata_qc_complete(qc, ATA_ERR);
641 }
642
643 return 1;
644}
645
646static void ahci_irq_clear(struct ata_port *ap)
647{
648 /* TODO */
649}
650
651static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
652{
653 struct ata_host_set *host_set = dev_instance;
654 struct ahci_host_priv *hpriv;
655 unsigned int i, handled = 0;
656 void *mmio;
657 u32 irq_stat, irq_ack = 0;
658
659 VPRINTK("ENTER\n");
660
661 hpriv = host_set->private_data;
662 mmio = host_set->mmio_base;
663
664 /* sigh. 0xffffffff is a valid return from h/w */
665 irq_stat = readl(mmio + HOST_IRQ_STAT);
666 irq_stat &= hpriv->port_map;
667 if (!irq_stat)
668 return IRQ_NONE;
669
670 spin_lock(&host_set->lock);
671
672 for (i = 0; i < host_set->n_ports; i++) {
673 struct ata_port *ap;
674 u32 tmp;
675
676 VPRINTK("port %u\n", i);
677 ap = host_set->ports[i];
678 tmp = irq_stat & (1 << i);
679 if (tmp && ap) {
680 struct ata_queued_cmd *qc;
681 qc = ata_qc_from_tag(ap, ap->active_tag);
682 if (ahci_host_intr(ap, qc))
683 irq_ack |= (1 << i);
684 }
685 }
686
687 if (irq_ack) {
688 writel(irq_ack, mmio + HOST_IRQ_STAT);
689 handled = 1;
690 }
691
692 spin_unlock(&host_set->lock);
693
694 VPRINTK("EXIT\n");
695
696 return IRQ_RETVAL(handled);
697}
698
699static int ahci_qc_issue(struct ata_queued_cmd *qc)
700{
701 struct ata_port *ap = qc->ap;
702 void *port_mmio = (void *) ap->ioaddr.cmd_addr;
703
704 writel(1, port_mmio + PORT_SCR_ACT);
705 readl(port_mmio + PORT_SCR_ACT); /* flush */
706
707 writel(1, port_mmio + PORT_CMD_ISSUE);
708 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
709
710 return 0;
711}
712
713static void ahci_setup_port(struct ata_ioports *port, unsigned long base,
714 unsigned int port_idx)
715{
716 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
717 base = ahci_port_base_ul(base, port_idx);
718 VPRINTK("base now==0x%lx\n", base);
719
720 port->cmd_addr = base;
721 port->scr_addr = base + PORT_SCR;
722
723 VPRINTK("EXIT\n");
724}
725
726static int ahci_host_init(struct ata_probe_ent *probe_ent)
727{
728 struct ahci_host_priv *hpriv = probe_ent->private_data;
729 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
730 void __iomem *mmio = probe_ent->mmio_base;
731 u32 tmp, cap_save;
732 u16 tmp16;
733 unsigned int i, j, using_dac;
734 int rc;
735 void __iomem *port_mmio;
736
737 cap_save = readl(mmio + HOST_CAP);
738 cap_save &= ( (1<<28) | (1<<17) );
739 cap_save |= (1 << 27);
740
741 /* global controller reset */
742 tmp = readl(mmio + HOST_CTL);
743 if ((tmp & HOST_RESET) == 0) {
744 writel(tmp | HOST_RESET, mmio + HOST_CTL);
745 readl(mmio + HOST_CTL); /* flush */
746 }
747
748 /* reset must complete within 1 second, or
749 * the hardware should be considered fried.
750 */
751 ssleep(1);
752
753 tmp = readl(mmio + HOST_CTL);
754 if (tmp & HOST_RESET) {
755 printk(KERN_ERR DRV_NAME "(%s): controller reset failed (0x%x)\n",
756 pci_name(pdev), tmp);
757 return -EIO;
758 }
759
760 writel(HOST_AHCI_EN, mmio + HOST_CTL);
761 (void) readl(mmio + HOST_CTL); /* flush */
762 writel(cap_save, mmio + HOST_CAP);
763 writel(0xf, mmio + HOST_PORTS_IMPL);
764 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
765
766 pci_read_config_word(pdev, 0x92, &tmp16);
767 tmp16 |= 0xf;
768 pci_write_config_word(pdev, 0x92, tmp16);
769
770 hpriv->cap = readl(mmio + HOST_CAP);
771 hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
772 probe_ent->n_ports = (hpriv->cap & 0x1f) + 1;
773
774 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
775 hpriv->cap, hpriv->port_map, probe_ent->n_ports);
776
777 using_dac = hpriv->cap & HOST_CAP_64;
778 if (using_dac &&
779 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
780 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
781 if (rc) {
782 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
783 if (rc) {
784 printk(KERN_ERR DRV_NAME "(%s): 64-bit DMA enable failed\n",
785 pci_name(pdev));
786 return rc;
787 }
788 }
789
790 hpriv->flags |= HOST_CAP_64;
791 } else {
792 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
793 if (rc) {
794 printk(KERN_ERR DRV_NAME "(%s): 32-bit DMA enable failed\n",
795 pci_name(pdev));
796 return rc;
797 }
798 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
799 if (rc) {
800 printk(KERN_ERR DRV_NAME "(%s): 32-bit consistent DMA enable failed\n",
801 pci_name(pdev));
802 return rc;
803 }
804 }
805
806 for (i = 0; i < probe_ent->n_ports; i++) {
807#if 0 /* BIOSen initialize this incorrectly */
808 if (!(hpriv->port_map & (1 << i)))
809 continue;
810#endif
811
812 port_mmio = ahci_port_base(mmio, i);
813 VPRINTK("mmio %p port_mmio %p\n", mmio, port_mmio);
814
815 ahci_setup_port(&probe_ent->port[i],
816 (unsigned long) mmio, i);
817
818 /* make sure port is not active */
819 tmp = readl(port_mmio + PORT_CMD);
820 VPRINTK("PORT_CMD 0x%x\n", tmp);
821 if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
822 PORT_CMD_FIS_RX | PORT_CMD_START)) {
823 tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
824 PORT_CMD_FIS_RX | PORT_CMD_START);
825 writel(tmp, port_mmio + PORT_CMD);
826 readl(port_mmio + PORT_CMD); /* flush */
827
828 /* spec says 500 msecs for each bit, so
829 * this is slightly incorrect.
830 */
831 msleep(500);
832 }
833
834 writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD);
835
836 j = 0;
837 while (j < 100) {
838 msleep(10);
839 tmp = readl(port_mmio + PORT_SCR_STAT);
840 if ((tmp & 0xf) == 0x3)
841 break;
842 j++;
843 }
844
845 tmp = readl(port_mmio + PORT_SCR_ERR);
846 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
847 writel(tmp, port_mmio + PORT_SCR_ERR);
848
849 /* ack any pending irq events for this port */
850 tmp = readl(port_mmio + PORT_IRQ_STAT);
851 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
852 if (tmp)
853 writel(tmp, port_mmio + PORT_IRQ_STAT);
854
855 writel(1 << i, mmio + HOST_IRQ_STAT);
856
857 /* set irq mask (enables interrupts) */
858 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
859 }
860
861 tmp = readl(mmio + HOST_CTL);
862 VPRINTK("HOST_CTL 0x%x\n", tmp);
863 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
864 tmp = readl(mmio + HOST_CTL);
865 VPRINTK("HOST_CTL 0x%x\n", tmp);
866
867 pci_set_master(pdev);
868
869 return 0;
870}
871
872/* move to PCI layer, integrate w/ MSI stuff */
873static void pci_enable_intx(struct pci_dev *pdev)
874{
875 u16 pci_command;
876
877 pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
878 if (pci_command & PCI_COMMAND_INTX_DISABLE) {
879 pci_command &= ~PCI_COMMAND_INTX_DISABLE;
880 pci_write_config_word(pdev, PCI_COMMAND, pci_command);
881 }
882}
883
884static void ahci_print_info(struct ata_probe_ent *probe_ent)
885{
886 struct ahci_host_priv *hpriv = probe_ent->private_data;
887 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
888 void *mmio = probe_ent->mmio_base;
889 u32 vers, cap, impl, speed;
890 const char *speed_s;
891 u16 cc;
892 const char *scc_s;
893
894 vers = readl(mmio + HOST_VERSION);
895 cap = hpriv->cap;
896 impl = hpriv->port_map;
897
898 speed = (cap >> 20) & 0xf;
899 if (speed == 1)
900 speed_s = "1.5";
901 else if (speed == 2)
902 speed_s = "3";
903 else
904 speed_s = "?";
905
906 pci_read_config_word(pdev, 0x0a, &cc);
907 if (cc == 0x0101)
908 scc_s = "IDE";
909 else if (cc == 0x0106)
910 scc_s = "SATA";
911 else if (cc == 0x0104)
912 scc_s = "RAID";
913 else
914 scc_s = "unknown";
915
916 printk(KERN_INFO DRV_NAME "(%s) AHCI %02x%02x.%02x%02x "
917 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
918 ,
919 pci_name(pdev),
920
921 (vers >> 24) & 0xff,
922 (vers >> 16) & 0xff,
923 (vers >> 8) & 0xff,
924 vers & 0xff,
925
926 ((cap >> 8) & 0x1f) + 1,
927 (cap & 0x1f) + 1,
928 speed_s,
929 impl,
930 scc_s);
931
932 printk(KERN_INFO DRV_NAME "(%s) flags: "
933 "%s%s%s%s%s%s"
934 "%s%s%s%s%s%s%s\n"
935 ,
936 pci_name(pdev),
937
938 cap & (1 << 31) ? "64bit " : "",
939 cap & (1 << 30) ? "ncq " : "",
940 cap & (1 << 28) ? "ilck " : "",
941 cap & (1 << 27) ? "stag " : "",
942 cap & (1 << 26) ? "pm " : "",
943 cap & (1 << 25) ? "led " : "",
944
945 cap & (1 << 24) ? "clo " : "",
946 cap & (1 << 19) ? "nz " : "",
947 cap & (1 << 18) ? "only " : "",
948 cap & (1 << 17) ? "pmp " : "",
949 cap & (1 << 15) ? "pio " : "",
950 cap & (1 << 14) ? "slum " : "",
951 cap & (1 << 13) ? "part " : ""
952 );
953}
954
955static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
956{
957 static int printed_version;
958 struct ata_probe_ent *probe_ent = NULL;
959 struct ahci_host_priv *hpriv;
960 unsigned long base;
961 void *mmio_base;
962 unsigned int board_idx = (unsigned int) ent->driver_data;
963 int pci_dev_busy = 0;
964 int rc;
965
966 VPRINTK("ENTER\n");
967
968 if (!printed_version++)
969 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
970
971 rc = pci_enable_device(pdev);
972 if (rc)
973 return rc;
974
975 rc = pci_request_regions(pdev, DRV_NAME);
976 if (rc) {
977 pci_dev_busy = 1;
978 goto err_out;
979 }
980
981 pci_enable_intx(pdev);
982
983 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
984 if (probe_ent == NULL) {
985 rc = -ENOMEM;
986 goto err_out_regions;
987 }
988
989 memset(probe_ent, 0, sizeof(*probe_ent));
990 probe_ent->dev = pci_dev_to_dev(pdev);
991 INIT_LIST_HEAD(&probe_ent->node);
992
993 mmio_base = ioremap(pci_resource_start(pdev, AHCI_PCI_BAR),
994 pci_resource_len(pdev, AHCI_PCI_BAR));
995 if (mmio_base == NULL) {
996 rc = -ENOMEM;
997 goto err_out_free_ent;
998 }
999 base = (unsigned long) mmio_base;
1000
1001 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1002 if (!hpriv) {
1003 rc = -ENOMEM;
1004 goto err_out_iounmap;
1005 }
1006 memset(hpriv, 0, sizeof(*hpriv));
1007
1008 probe_ent->sht = ahci_port_info[board_idx].sht;
1009 probe_ent->host_flags = ahci_port_info[board_idx].host_flags;
1010 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
1011 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
1012 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
1013
1014 probe_ent->irq = pdev->irq;
1015 probe_ent->irq_flags = SA_SHIRQ;
1016 probe_ent->mmio_base = mmio_base;
1017 probe_ent->private_data = hpriv;
1018
1019 /* initialize adapter */
1020 rc = ahci_host_init(probe_ent);
1021 if (rc)
1022 goto err_out_hpriv;
1023
1024 ahci_print_info(probe_ent);
1025
1026 /* FIXME: check ata_device_add return value */
1027 ata_device_add(probe_ent);
1028 kfree(probe_ent);
1029
1030 return 0;
1031
1032err_out_hpriv:
1033 kfree(hpriv);
1034err_out_iounmap:
1035 iounmap(mmio_base);
1036err_out_free_ent:
1037 kfree(probe_ent);
1038err_out_regions:
1039 pci_release_regions(pdev);
1040err_out:
1041 if (!pci_dev_busy)
1042 pci_disable_device(pdev);
1043 return rc;
1044}
1045
1046
1047static int __init ahci_init(void)
1048{
1049 return pci_module_init(&ahci_pci_driver);
1050}
1051
1052
1053static void __exit ahci_exit(void)
1054{
1055 pci_unregister_driver(&ahci_pci_driver);
1056}
1057
1058
1059MODULE_AUTHOR("Jeff Garzik");
1060MODULE_DESCRIPTION("AHCI SATA low-level driver");
1061MODULE_LICENSE("GPL");
1062MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1063
1064module_init(ahci_init);
1065module_exit(ahci_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-13 23:32:55 -0500