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Merge branch 'tip/tracing/ftrace' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6/mini2440.git] / drivers / ata / sata_sil24.c
blob2590c2279fa79f685e5d8a81eeb99d216e87f2e8
1 /*
2 * sata_sil24.c - Driver for Silicon Image 3124/3132 SATA-2 controllers
3 *
4 * Copyright 2005 Tejun Heo
5 *
6 * Based on preview driver from Silicon Image.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2, or (at your option) any
11 * later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 */
19
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/pci.h>
23 #include <linux/blkdev.h>
24 #include <linux/delay.h>
25 #include <linux/interrupt.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/device.h>
28 #include <scsi/scsi_host.h>
29 #include <scsi/scsi_cmnd.h>
30 #include <linux/libata.h>
31
32 #define DRV_NAME "sata_sil24"
33 #define DRV_VERSION "1.1"
34
35 /*
36 * Port request block (PRB) 32 bytes
37 */
38 struct sil24_prb {
39 __le16 ctrl;
40 __le16 prot;
41 __le32 rx_cnt;
42 u8 fis[6 * 4];
43 };
44
45 /*
46 * Scatter gather entry (SGE) 16 bytes
47 */
48 struct sil24_sge {
49 __le64 addr;
50 __le32 cnt;
51 __le32 flags;
52 };
53
54
55 enum {
56 SIL24_HOST_BAR = 0,
57 SIL24_PORT_BAR = 2,
58
59 /* sil24 fetches in chunks of 64bytes. The first block
60 * contains the PRB and two SGEs. From the second block, it's
61 * consisted of four SGEs and called SGT. Calculate the
62 * number of SGTs that fit into one page.
63 */
64 SIL24_PRB_SZ = sizeof(struct sil24_prb)
65 + 2 * sizeof(struct sil24_sge),
66 SIL24_MAX_SGT = (PAGE_SIZE - SIL24_PRB_SZ)
67 / (4 * sizeof(struct sil24_sge)),
68
69 /* This will give us one unused SGEs for ATA. This extra SGE
70 * will be used to store CDB for ATAPI devices.
71 */
72 SIL24_MAX_SGE = 4 * SIL24_MAX_SGT + 1,
73
74 /*
75 * Global controller registers (128 bytes @ BAR0)
76 */
77 /* 32 bit regs */
78 HOST_SLOT_STAT = 0x00, /* 32 bit slot stat * 4 */
79 HOST_CTRL = 0x40,
80 HOST_IRQ_STAT = 0x44,
81 HOST_PHY_CFG = 0x48,
82 HOST_BIST_CTRL = 0x50,
83 HOST_BIST_PTRN = 0x54,
84 HOST_BIST_STAT = 0x58,
85 HOST_MEM_BIST_STAT = 0x5c,
86 HOST_FLASH_CMD = 0x70,
87 /* 8 bit regs */
88 HOST_FLASH_DATA = 0x74,
89 HOST_TRANSITION_DETECT = 0x75,
90 HOST_GPIO_CTRL = 0x76,
91 HOST_I2C_ADDR = 0x78, /* 32 bit */
92 HOST_I2C_DATA = 0x7c,
93 HOST_I2C_XFER_CNT = 0x7e,
94 HOST_I2C_CTRL = 0x7f,
95
96 /* HOST_SLOT_STAT bits */
97 HOST_SSTAT_ATTN = (1 << 31),
98
99 /* HOST_CTRL bits */
100 HOST_CTRL_M66EN = (1 << 16), /* M66EN PCI bus signal */
101 HOST_CTRL_TRDY = (1 << 17), /* latched PCI TRDY */
102 HOST_CTRL_STOP = (1 << 18), /* latched PCI STOP */
103 HOST_CTRL_DEVSEL = (1 << 19), /* latched PCI DEVSEL */
104 HOST_CTRL_REQ64 = (1 << 20), /* latched PCI REQ64 */
105 HOST_CTRL_GLOBAL_RST = (1 << 31), /* global reset */
106
107 /*
108 * Port registers
109 * (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2)
110 */
111 PORT_REGS_SIZE = 0x2000,
112
113 PORT_LRAM = 0x0000, /* 31 LRAM slots and PMP regs */
114 PORT_LRAM_SLOT_SZ = 0x0080, /* 32 bytes PRB + 2 SGE, ACT... */
115
116 PORT_PMP = 0x0f80, /* 8 bytes PMP * 16 (128 bytes) */
117 PORT_PMP_STATUS = 0x0000, /* port device status offset */
118 PORT_PMP_QACTIVE = 0x0004, /* port device QActive offset */
119 PORT_PMP_SIZE = 0x0008, /* 8 bytes per PMP */
120
121 /* 32 bit regs */
122 PORT_CTRL_STAT = 0x1000, /* write: ctrl-set, read: stat */
123 PORT_CTRL_CLR = 0x1004, /* write: ctrl-clear */
124 PORT_IRQ_STAT = 0x1008, /* high: status, low: interrupt */
125 PORT_IRQ_ENABLE_SET = 0x1010, /* write: enable-set */
126 PORT_IRQ_ENABLE_CLR = 0x1014, /* write: enable-clear */
127 PORT_ACTIVATE_UPPER_ADDR= 0x101c,
128 PORT_EXEC_FIFO = 0x1020, /* command execution fifo */
129 PORT_CMD_ERR = 0x1024, /* command error number */
130 PORT_FIS_CFG = 0x1028,
131 PORT_FIFO_THRES = 0x102c,
132 /* 16 bit regs */
133 PORT_DECODE_ERR_CNT = 0x1040,
134 PORT_DECODE_ERR_THRESH = 0x1042,
135 PORT_CRC_ERR_CNT = 0x1044,
136 PORT_CRC_ERR_THRESH = 0x1046,
137 PORT_HSHK_ERR_CNT = 0x1048,
138 PORT_HSHK_ERR_THRESH = 0x104a,
139 /* 32 bit regs */
140 PORT_PHY_CFG = 0x1050,
141 PORT_SLOT_STAT = 0x1800,
142 PORT_CMD_ACTIVATE = 0x1c00, /* 64 bit cmd activate * 31 (248 bytes) */
143 PORT_CONTEXT = 0x1e04,
144 PORT_EXEC_DIAG = 0x1e00, /* 32bit exec diag * 16 (64 bytes, 0-10 used on 3124) */
145 PORT_PSD_DIAG = 0x1e40, /* 32bit psd diag * 16 (64 bytes, 0-8 used on 3124) */
146 PORT_SCONTROL = 0x1f00,
147 PORT_SSTATUS = 0x1f04,
148 PORT_SERROR = 0x1f08,
149 PORT_SACTIVE = 0x1f0c,
150
151 /* PORT_CTRL_STAT bits */
152 PORT_CS_PORT_RST = (1 << 0), /* port reset */
153 PORT_CS_DEV_RST = (1 << 1), /* device reset */
154 PORT_CS_INIT = (1 << 2), /* port initialize */
155 PORT_CS_IRQ_WOC = (1 << 3), /* interrupt write one to clear */
156 PORT_CS_CDB16 = (1 << 5), /* 0=12b cdb, 1=16b cdb */
157 PORT_CS_PMP_RESUME = (1 << 6), /* PMP resume */
158 PORT_CS_32BIT_ACTV = (1 << 10), /* 32-bit activation */
159 PORT_CS_PMP_EN = (1 << 13), /* port multiplier enable */
160 PORT_CS_RDY = (1 << 31), /* port ready to accept commands */
161
162 /* PORT_IRQ_STAT/ENABLE_SET/CLR */
163 /* bits[11:0] are masked */
164 PORT_IRQ_COMPLETE = (1 << 0), /* command(s) completed */
165 PORT_IRQ_ERROR = (1 << 1), /* command execution error */
166 PORT_IRQ_PORTRDY_CHG = (1 << 2), /* port ready change */
167 PORT_IRQ_PWR_CHG = (1 << 3), /* power management change */
168 PORT_IRQ_PHYRDY_CHG = (1 << 4), /* PHY ready change */
169 PORT_IRQ_COMWAKE = (1 << 5), /* COMWAKE received */
170 PORT_IRQ_UNK_FIS = (1 << 6), /* unknown FIS received */
171 PORT_IRQ_DEV_XCHG = (1 << 7), /* device exchanged */
172 PORT_IRQ_8B10B = (1 << 8), /* 8b/10b decode error threshold */
173 PORT_IRQ_CRC = (1 << 9), /* CRC error threshold */
174 PORT_IRQ_HANDSHAKE = (1 << 10), /* handshake error threshold */
175 PORT_IRQ_SDB_NOTIFY = (1 << 11), /* SDB notify received */
176
177 DEF_PORT_IRQ = PORT_IRQ_COMPLETE | PORT_IRQ_ERROR |
178 PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG |
179 PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_NOTIFY,
180
181 /* bits[27:16] are unmasked (raw) */
182 PORT_IRQ_RAW_SHIFT = 16,
183 PORT_IRQ_MASKED_MASK = 0x7ff,
184 PORT_IRQ_RAW_MASK = (0x7ff << PORT_IRQ_RAW_SHIFT),
185
186 /* ENABLE_SET/CLR specific, intr steering - 2 bit field */
187 PORT_IRQ_STEER_SHIFT = 30,
188 PORT_IRQ_STEER_MASK = (3 << PORT_IRQ_STEER_SHIFT),
189
190 /* PORT_CMD_ERR constants */
191 PORT_CERR_DEV = 1, /* Error bit in D2H Register FIS */
192 PORT_CERR_SDB = 2, /* Error bit in SDB FIS */
193 PORT_CERR_DATA = 3, /* Error in data FIS not detected by dev */
194 PORT_CERR_SEND = 4, /* Initial cmd FIS transmission failure */
195 PORT_CERR_INCONSISTENT = 5, /* Protocol mismatch */
196 PORT_CERR_DIRECTION = 6, /* Data direction mismatch */
197 PORT_CERR_UNDERRUN = 7, /* Ran out of SGEs while writing */
198 PORT_CERR_OVERRUN = 8, /* Ran out of SGEs while reading */
199 PORT_CERR_PKT_PROT = 11, /* DIR invalid in 1st PIO setup of ATAPI */
200 PORT_CERR_SGT_BOUNDARY = 16, /* PLD ecode 00 - SGT not on qword boundary */
201 PORT_CERR_SGT_TGTABRT = 17, /* PLD ecode 01 - target abort */
202 PORT_CERR_SGT_MSTABRT = 18, /* PLD ecode 10 - master abort */
203 PORT_CERR_SGT_PCIPERR = 19, /* PLD ecode 11 - PCI parity err while fetching SGT */
204 PORT_CERR_CMD_BOUNDARY = 24, /* ctrl[15:13] 001 - PRB not on qword boundary */
205 PORT_CERR_CMD_TGTABRT = 25, /* ctrl[15:13] 010 - target abort */
206 PORT_CERR_CMD_MSTABRT = 26, /* ctrl[15:13] 100 - master abort */
207 PORT_CERR_CMD_PCIPERR = 27, /* ctrl[15:13] 110 - PCI parity err while fetching PRB */
208 PORT_CERR_XFR_UNDEF = 32, /* PSD ecode 00 - undefined */
209 PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */
210 PORT_CERR_XFR_MSTABRT = 34, /* PSD ecode 10 - master abort */
211 PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */
212 PORT_CERR_SENDSERVICE = 36, /* FIS received while sending service */
213
214 /* bits of PRB control field */
215 PRB_CTRL_PROTOCOL = (1 << 0), /* override def. ATA protocol */
216 PRB_CTRL_PACKET_READ = (1 << 4), /* PACKET cmd read */
217 PRB_CTRL_PACKET_WRITE = (1 << 5), /* PACKET cmd write */
218 PRB_CTRL_NIEN = (1 << 6), /* Mask completion irq */
219 PRB_CTRL_SRST = (1 << 7), /* Soft reset request (ign BSY?) */
220
221 /* PRB protocol field */
222 PRB_PROT_PACKET = (1 << 0),
223 PRB_PROT_TCQ = (1 << 1),
224 PRB_PROT_NCQ = (1 << 2),
225 PRB_PROT_READ = (1 << 3),
226 PRB_PROT_WRITE = (1 << 4),
227 PRB_PROT_TRANSPARENT = (1 << 5),
228
229 /*
230 * Other constants
231 */
232 SGE_TRM = (1 << 31), /* Last SGE in chain */
233 SGE_LNK = (1 << 30), /* linked list
234 Points to SGT, not SGE */
235 SGE_DRD = (1 << 29), /* discard data read (/dev/null)
236 data address ignored */
237
238 SIL24_MAX_CMDS = 31,
239
240 /* board id */
241 BID_SIL3124 = 0,
242 BID_SIL3132 = 1,
243 BID_SIL3131 = 2,
244
245 /* host flags */
246 SIL24_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
247 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
248 ATA_FLAG_NCQ | ATA_FLAG_ACPI_SATA |
249 ATA_FLAG_AN | ATA_FLAG_PMP,
250 SIL24_FLAG_PCIX_IRQ_WOC = (1 << 24), /* IRQ loss errata on PCI-X */
251
252 IRQ_STAT_4PORTS = 0xf,
253 };
254
255 struct sil24_ata_block {
256 struct sil24_prb prb;
257 struct sil24_sge sge[SIL24_MAX_SGE];
258 };
259
260 struct sil24_atapi_block {
261 struct sil24_prb prb;
262 u8 cdb[16];
263 struct sil24_sge sge[SIL24_MAX_SGE];
264 };
265
266 union sil24_cmd_block {
267 struct sil24_ata_block ata;
268 struct sil24_atapi_block atapi;
269 };
270
271 static struct sil24_cerr_info {
272 unsigned int err_mask, action;
273 const char *desc;
274 } sil24_cerr_db[] = {
275 [0] = { AC_ERR_DEV, 0,
276 "device error" },
277 [PORT_CERR_DEV] = { AC_ERR_DEV, 0,
278 "device error via D2H FIS" },
279 [PORT_CERR_SDB] = { AC_ERR_DEV, 0,
280 "device error via SDB FIS" },
281 [PORT_CERR_DATA] = { AC_ERR_ATA_BUS, ATA_EH_RESET,
282 "error in data FIS" },
283 [PORT_CERR_SEND] = { AC_ERR_ATA_BUS, ATA_EH_RESET,
284 "failed to transmit command FIS" },
285 [PORT_CERR_INCONSISTENT] = { AC_ERR_HSM, ATA_EH_RESET,
286 "protocol mismatch" },
287 [PORT_CERR_DIRECTION] = { AC_ERR_HSM, ATA_EH_RESET,
288 "data directon mismatch" },
289 [PORT_CERR_UNDERRUN] = { AC_ERR_HSM, ATA_EH_RESET,
290 "ran out of SGEs while writing" },
291 [PORT_CERR_OVERRUN] = { AC_ERR_HSM, ATA_EH_RESET,
292 "ran out of SGEs while reading" },
293 [PORT_CERR_PKT_PROT] = { AC_ERR_HSM, ATA_EH_RESET,
294 "invalid data directon for ATAPI CDB" },
295 [PORT_CERR_SGT_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_RESET,
296 "SGT not on qword boundary" },
297 [PORT_CERR_SGT_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
298 "PCI target abort while fetching SGT" },
299 [PORT_CERR_SGT_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
300 "PCI master abort while fetching SGT" },
301 [PORT_CERR_SGT_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
302 "PCI parity error while fetching SGT" },
303 [PORT_CERR_CMD_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_RESET,
304 "PRB not on qword boundary" },
305 [PORT_CERR_CMD_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
306 "PCI target abort while fetching PRB" },
307 [PORT_CERR_CMD_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
308 "PCI master abort while fetching PRB" },
309 [PORT_CERR_CMD_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
310 "PCI parity error while fetching PRB" },
311 [PORT_CERR_XFR_UNDEF] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
312 "undefined error while transferring data" },
313 [PORT_CERR_XFR_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
314 "PCI target abort while transferring data" },
315 [PORT_CERR_XFR_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
316 "PCI master abort while transferring data" },
317 [PORT_CERR_XFR_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
318 "PCI parity error while transferring data" },
319 [PORT_CERR_SENDSERVICE] = { AC_ERR_HSM, ATA_EH_RESET,
320 "FIS received while sending service FIS" },
321 };
322
323 /*
324 * ap->private_data
325 *
326 * The preview driver always returned 0 for status. We emulate it
327 * here from the previous interrupt.
328 */
329 struct sil24_port_priv {
330 union sil24_cmd_block *cmd_block; /* 32 cmd blocks */
331 dma_addr_t cmd_block_dma; /* DMA base addr for them */
332 int do_port_rst;
333 };
334
335 static void sil24_dev_config(struct ata_device *dev);
336 static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val);
337 static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val);
338 static int sil24_qc_defer(struct ata_queued_cmd *qc);
339 static void sil24_qc_prep(struct ata_queued_cmd *qc);
340 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc);
341 static bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc);
342 static void sil24_pmp_attach(struct ata_port *ap);
343 static void sil24_pmp_detach(struct ata_port *ap);
344 static void sil24_freeze(struct ata_port *ap);
345 static void sil24_thaw(struct ata_port *ap);
346 static int sil24_softreset(struct ata_link *link, unsigned int *class,
347 unsigned long deadline);
348 static int sil24_hardreset(struct ata_link *link, unsigned int *class,
349 unsigned long deadline);
350 static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class,
351 unsigned long deadline);
352 static void sil24_error_handler(struct ata_port *ap);
353 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc);
354 static int sil24_port_start(struct ata_port *ap);
355 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
356 #ifdef CONFIG_PM
357 static int sil24_pci_device_resume(struct pci_dev *pdev);
358 static int sil24_port_resume(struct ata_port *ap);
359 #endif
360
361 static const struct pci_device_id sil24_pci_tbl[] = {
362 { PCI_VDEVICE(CMD, 0x3124), BID_SIL3124 },
363 { PCI_VDEVICE(INTEL, 0x3124), BID_SIL3124 },
364 { PCI_VDEVICE(CMD, 0x3132), BID_SIL3132 },
365 { PCI_VDEVICE(CMD, 0x0242), BID_SIL3132 },
366 { PCI_VDEVICE(CMD, 0x0244), BID_SIL3132 },
367 { PCI_VDEVICE(CMD, 0x3131), BID_SIL3131 },
368 { PCI_VDEVICE(CMD, 0x3531), BID_SIL3131 },
369
370 { } /* terminate list */
371 };
372
373 static struct pci_driver sil24_pci_driver = {
374 .name = DRV_NAME,
375 .id_table = sil24_pci_tbl,
376 .probe = sil24_init_one,
377 .remove = ata_pci_remove_one,
378 #ifdef CONFIG_PM
379 .suspend = ata_pci_device_suspend,
380 .resume = sil24_pci_device_resume,
381 #endif
382 };
383
384 static struct scsi_host_template sil24_sht = {
385 ATA_NCQ_SHT(DRV_NAME),
386 .can_queue = SIL24_MAX_CMDS,
387 .sg_tablesize = SIL24_MAX_SGE,
388 .dma_boundary = ATA_DMA_BOUNDARY,
389 };
390
391 static struct ata_port_operations sil24_ops = {
392 .inherits = &sata_pmp_port_ops,
393
394 .qc_defer = sil24_qc_defer,
395 .qc_prep = sil24_qc_prep,
396 .qc_issue = sil24_qc_issue,
397 .qc_fill_rtf = sil24_qc_fill_rtf,
398
399 .freeze = sil24_freeze,
400 .thaw = sil24_thaw,
401 .softreset = sil24_softreset,
402 .hardreset = sil24_hardreset,
403 .pmp_softreset = sil24_softreset,
404 .pmp_hardreset = sil24_pmp_hardreset,
405 .error_handler = sil24_error_handler,
406 .post_internal_cmd = sil24_post_internal_cmd,
407 .dev_config = sil24_dev_config,
408
409 .scr_read = sil24_scr_read,
410 .scr_write = sil24_scr_write,
411 .pmp_attach = sil24_pmp_attach,
412 .pmp_detach = sil24_pmp_detach,
413
414 .port_start = sil24_port_start,
415 #ifdef CONFIG_PM
416 .port_resume = sil24_port_resume,
417 #endif
418 };
419
420 /*
421 * Use bits 30-31 of port_flags to encode available port numbers.
422 * Current maxium is 4.
423 */
424 #define SIL24_NPORTS2FLAG(nports) ((((unsigned)(nports) - 1) & 0x3) << 30)
425 #define SIL24_FLAG2NPORTS(flag) ((((flag) >> 30) & 0x3) + 1)
426
427 static const struct ata_port_info sil24_port_info[] = {
428 /* sil_3124 */
429 {
430 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(4) |
431 SIL24_FLAG_PCIX_IRQ_WOC,
432 .pio_mask = 0x1f, /* pio0-4 */
433 .mwdma_mask = 0x07, /* mwdma0-2 */
434 .udma_mask = ATA_UDMA5, /* udma0-5 */
435 .port_ops = &sil24_ops,
436 },
437 /* sil_3132 */
438 {
439 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2),
440 .pio_mask = 0x1f, /* pio0-4 */
441 .mwdma_mask = 0x07, /* mwdma0-2 */
442 .udma_mask = ATA_UDMA5, /* udma0-5 */
443 .port_ops = &sil24_ops,
444 },
445 /* sil_3131/sil_3531 */
446 {
447 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1),
448 .pio_mask = 0x1f, /* pio0-4 */
449 .mwdma_mask = 0x07, /* mwdma0-2 */
450 .udma_mask = ATA_UDMA5, /* udma0-5 */
451 .port_ops = &sil24_ops,
452 },
453 };
454
455 static int sil24_tag(int tag)
456 {
457 if (unlikely(ata_tag_internal(tag)))
458 return 0;
459 return tag;
460 }
461
462 static unsigned long sil24_port_offset(struct ata_port *ap)
463 {
464 return ap->port_no * PORT_REGS_SIZE;
465 }
466
467 static void __iomem *sil24_port_base(struct ata_port *ap)
468 {
469 return ap->host->iomap[SIL24_PORT_BAR] + sil24_port_offset(ap);
470 }
471
472 static void sil24_dev_config(struct ata_device *dev)
473 {
474 void __iomem *port = sil24_port_base(dev->link->ap);
475
476 if (dev->cdb_len == 16)
477 writel(PORT_CS_CDB16, port + PORT_CTRL_STAT);
478 else
479 writel(PORT_CS_CDB16, port + PORT_CTRL_CLR);
480 }
481
482 static void sil24_read_tf(struct ata_port *ap, int tag, struct ata_taskfile *tf)
483 {
484 void __iomem *port = sil24_port_base(ap);
485 struct sil24_prb __iomem *prb;
486 u8 fis[6 * 4];
487
488 prb = port + PORT_LRAM + sil24_tag(tag) * PORT_LRAM_SLOT_SZ;
489 memcpy_fromio(fis, prb->fis, sizeof(fis));
490 ata_tf_from_fis(fis, tf);
491 }
492
493 static int sil24_scr_map[] = {
494 [SCR_CONTROL] = 0,
495 [SCR_STATUS] = 1,
496 [SCR_ERROR] = 2,
497 [SCR_ACTIVE] = 3,
498 };
499
500 static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val)
501 {
502 void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL;
503
504 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
505 void __iomem *addr;
506 addr = scr_addr + sil24_scr_map[sc_reg] * 4;
507 *val = readl(scr_addr + sil24_scr_map[sc_reg] * 4);
508 return 0;
509 }
510 return -EINVAL;
511 }
512
513 static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val)
514 {
515 void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL;
516
517 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
518 void __iomem *addr;
519 addr = scr_addr + sil24_scr_map[sc_reg] * 4;
520 writel(val, scr_addr + sil24_scr_map[sc_reg] * 4);
521 return 0;
522 }
523 return -EINVAL;
524 }
525
526 static void sil24_config_port(struct ata_port *ap)
527 {
528 void __iomem *port = sil24_port_base(ap);
529
530 /* configure IRQ WoC */
531 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC)
532 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_STAT);
533 else
534 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR);
535
536 /* zero error counters. */
537 writel(0x8000, port + PORT_DECODE_ERR_THRESH);
538 writel(0x8000, port + PORT_CRC_ERR_THRESH);
539 writel(0x8000, port + PORT_HSHK_ERR_THRESH);
540 writel(0x0000, port + PORT_DECODE_ERR_CNT);
541 writel(0x0000, port + PORT_CRC_ERR_CNT);
542 writel(0x0000, port + PORT_HSHK_ERR_CNT);
543
544 /* always use 64bit activation */
545 writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_CLR);
546
547 /* clear port multiplier enable and resume bits */
548 writel(PORT_CS_PMP_EN | PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR);
549 }
550
551 static void sil24_config_pmp(struct ata_port *ap, int attached)
552 {
553 void __iomem *port = sil24_port_base(ap);
554
555 if (attached)
556 writel(PORT_CS_PMP_EN, port + PORT_CTRL_STAT);
557 else
558 writel(PORT_CS_PMP_EN, port + PORT_CTRL_CLR);
559 }
560
561 static void sil24_clear_pmp(struct ata_port *ap)
562 {
563 void __iomem *port = sil24_port_base(ap);
564 int i;
565
566 writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR);
567
568 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) {
569 void __iomem *pmp_base = port + PORT_PMP + i * PORT_PMP_SIZE;
570
571 writel(0, pmp_base + PORT_PMP_STATUS);
572 writel(0, pmp_base + PORT_PMP_QACTIVE);
573 }
574 }
575
576 static int sil24_init_port(struct ata_port *ap)
577 {
578 void __iomem *port = sil24_port_base(ap);
579 struct sil24_port_priv *pp = ap->private_data;
580 u32 tmp;
581
582 /* clear PMP error status */
583 if (sata_pmp_attached(ap))
584 sil24_clear_pmp(ap);
585
586 writel(PORT_CS_INIT, port + PORT_CTRL_STAT);
587 ata_wait_register(port + PORT_CTRL_STAT,
588 PORT_CS_INIT, PORT_CS_INIT, 10, 100);
589 tmp = ata_wait_register(port + PORT_CTRL_STAT,
590 PORT_CS_RDY, 0, 10, 100);
591
592 if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY) {
593 pp->do_port_rst = 1;
594 ap->link.eh_context.i.action |= ATA_EH_RESET;
595 return -EIO;
596 }
597
598 return 0;
599 }
600
601 static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp,
602 const struct ata_taskfile *tf,
603 int is_cmd, u32 ctrl,
604 unsigned long timeout_msec)
605 {
606 void __iomem *port = sil24_port_base(ap);
607 struct sil24_port_priv *pp = ap->private_data;
608 struct sil24_prb *prb = &pp->cmd_block[0].ata.prb;
609 dma_addr_t paddr = pp->cmd_block_dma;
610 u32 irq_enabled, irq_mask, irq_stat;
611 int rc;
612
613 prb->ctrl = cpu_to_le16(ctrl);
614 ata_tf_to_fis(tf, pmp, is_cmd, prb->fis);
615
616 /* temporarily plug completion and error interrupts */
617 irq_enabled = readl(port + PORT_IRQ_ENABLE_SET);
618 writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR, port + PORT_IRQ_ENABLE_CLR);
619
620 writel((u32)paddr, port + PORT_CMD_ACTIVATE);
621 writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4);
622
623 irq_mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT;
624 irq_stat = ata_wait_register(port + PORT_IRQ_STAT, irq_mask, 0x0,
625 10, timeout_msec);
626
627 writel(irq_mask, port + PORT_IRQ_STAT); /* clear IRQs */
628 irq_stat >>= PORT_IRQ_RAW_SHIFT;
629
630 if (irq_stat & PORT_IRQ_COMPLETE)
631 rc = 0;
632 else {
633 /* force port into known state */
634 sil24_init_port(ap);
635
636 if (irq_stat & PORT_IRQ_ERROR)
637 rc = -EIO;
638 else
639 rc = -EBUSY;
640 }
641
642 /* restore IRQ enabled */
643 writel(irq_enabled, port + PORT_IRQ_ENABLE_SET);
644
645 return rc;
646 }
647
648 static int sil24_softreset(struct ata_link *link, unsigned int *class,
649 unsigned long deadline)
650 {
651 struct ata_port *ap = link->ap;
652 int pmp = sata_srst_pmp(link);
653 unsigned long timeout_msec = 0;
654 struct ata_taskfile tf;
655 const char *reason;
656 int rc;
657
658 DPRINTK("ENTER\n");
659
660 /* put the port into known state */
661 if (sil24_init_port(ap)) {
662 reason = "port not ready";
663 goto err;
664 }
665
666 /* do SRST */
667 if (time_after(deadline, jiffies))
668 timeout_msec = jiffies_to_msecs(deadline - jiffies);
669
670 ata_tf_init(link->device, &tf); /* doesn't really matter */
671 rc = sil24_exec_polled_cmd(ap, pmp, &tf, 0, PRB_CTRL_SRST,
672 timeout_msec);
673 if (rc == -EBUSY) {
674 reason = "timeout";
675 goto err;
676 } else if (rc) {
677 reason = "SRST command error";
678 goto err;
679 }
680
681 sil24_read_tf(ap, 0, &tf);
682 *class = ata_dev_classify(&tf);
683
684 DPRINTK("EXIT, class=%u\n", *class);
685 return 0;
686
687 err:
688 ata_link_printk(link, KERN_ERR, "softreset failed (%s)\n", reason);
689 return -EIO;
690 }
691
692 static int sil24_hardreset(struct ata_link *link, unsigned int *class,
693 unsigned long deadline)
694 {
695 struct ata_port *ap = link->ap;
696 void __iomem *port = sil24_port_base(ap);
697 struct sil24_port_priv *pp = ap->private_data;
698 int did_port_rst = 0;
699 const char *reason;
700 int tout_msec, rc;
701 u32 tmp;
702
703 retry:
704 /* Sometimes, DEV_RST is not enough to recover the controller.
705 * This happens often after PM DMA CS errata.
706 */
707 if (pp->do_port_rst) {
708 ata_port_printk(ap, KERN_WARNING, "controller in dubious "
709 "state, performing PORT_RST\n");
710
711 writel(PORT_CS_PORT_RST, port + PORT_CTRL_STAT);
712 msleep(10);
713 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
714 ata_wait_register(port + PORT_CTRL_STAT, PORT_CS_RDY, 0,
715 10, 5000);
716
717 /* restore port configuration */
718 sil24_config_port(ap);
719 sil24_config_pmp(ap, ap->nr_pmp_links);
720
721 pp->do_port_rst = 0;
722 did_port_rst = 1;
723 }
724
725 /* sil24 does the right thing(tm) without any protection */
726 sata_set_spd(link);
727
728 tout_msec = 100;
729 if (ata_link_online(link))
730 tout_msec = 5000;
731
732 writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT);
733 tmp = ata_wait_register(port + PORT_CTRL_STAT,
734 PORT_CS_DEV_RST, PORT_CS_DEV_RST, 10,
735 tout_msec);
736
737 /* SStatus oscillates between zero and valid status after
738 * DEV_RST, debounce it.
739 */
740 rc = sata_link_debounce(link, sata_deb_timing_long, deadline);
741 if (rc) {
742 reason = "PHY debouncing failed";
743 goto err;
744 }
745
746 if (tmp & PORT_CS_DEV_RST) {
747 if (ata_link_offline(link))
748 return 0;
749 reason = "link not ready";
750 goto err;
751 }
752
753 /* Sil24 doesn't store signature FIS after hardreset, so we
754 * can't wait for BSY to clear. Some devices take a long time
755 * to get ready and those devices will choke if we don't wait
756 * for BSY clearance here. Tell libata to perform follow-up
757 * softreset.
758 */
759 return -EAGAIN;
760
761 err:
762 if (!did_port_rst) {
763 pp->do_port_rst = 1;
764 goto retry;
765 }
766
767 ata_link_printk(link, KERN_ERR, "hardreset failed (%s)\n", reason);
768 return -EIO;
769 }
770
771 static inline void sil24_fill_sg(struct ata_queued_cmd *qc,
772 struct sil24_sge *sge)
773 {
774 struct scatterlist *sg;
775 struct sil24_sge *last_sge = NULL;
776 unsigned int si;
777
778 for_each_sg(qc->sg, sg, qc->n_elem, si) {
779 sge->addr = cpu_to_le64(sg_dma_address(sg));
780 sge->cnt = cpu_to_le32(sg_dma_len(sg));
781 sge->flags = 0;
782
783 last_sge = sge;
784 sge++;
785 }
786
787 last_sge->flags = cpu_to_le32(SGE_TRM);
788 }
789
790 static int sil24_qc_defer(struct ata_queued_cmd *qc)
791 {
792 struct ata_link *link = qc->dev->link;
793 struct ata_port *ap = link->ap;
794 u8 prot = qc->tf.protocol;
795
796 /*
797 * There is a bug in the chip:
798 * Port LRAM Causes the PRB/SGT Data to be Corrupted
799 * If the host issues a read request for LRAM and SActive registers
800 * while active commands are available in the port, PRB/SGT data in
801 * the LRAM can become corrupted. This issue applies only when
802 * reading from, but not writing to, the LRAM.
803 *
804 * Therefore, reading LRAM when there is no particular error [and
805 * other commands may be outstanding] is prohibited.
806 *
807 * To avoid this bug there are two situations where a command must run
808 * exclusive of any other commands on the port:
809 *
810 * - ATAPI commands which check the sense data
811 * - Passthrough ATA commands which always have ATA_QCFLAG_RESULT_TF
812 * set.
813 *
814 */
815 int is_excl = (ata_is_atapi(prot) ||
816 (qc->flags & ATA_QCFLAG_RESULT_TF));
817
818 if (unlikely(ap->excl_link)) {
819 if (link == ap->excl_link) {
820 if (ap->nr_active_links)
821 return ATA_DEFER_PORT;
822 qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
823 } else
824 return ATA_DEFER_PORT;
825 } else if (unlikely(is_excl)) {
826 ap->excl_link = link;
827 if (ap->nr_active_links)
828 return ATA_DEFER_PORT;
829 qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
830 }
831
832 return ata_std_qc_defer(qc);
833 }
834
835 static void sil24_qc_prep(struct ata_queued_cmd *qc)
836 {
837 struct ata_port *ap = qc->ap;
838 struct sil24_port_priv *pp = ap->private_data;
839 union sil24_cmd_block *cb;
840 struct sil24_prb *prb;
841 struct sil24_sge *sge;
842 u16 ctrl = 0;
843
844 cb = &pp->cmd_block[sil24_tag(qc->tag)];
845
846 if (!ata_is_atapi(qc->tf.protocol)) {
847 prb = &cb->ata.prb;
848 sge = cb->ata.sge;
849 } else {
850 prb = &cb->atapi.prb;
851 sge = cb->atapi.sge;
852 memset(cb->atapi.cdb, 0, 32);
853 memcpy(cb->atapi.cdb, qc->cdb, qc->dev->cdb_len);
854
855 if (ata_is_data(qc->tf.protocol)) {
856 if (qc->tf.flags & ATA_TFLAG_WRITE)
857 ctrl = PRB_CTRL_PACKET_WRITE;
858 else
859 ctrl = PRB_CTRL_PACKET_READ;
860 }
861 }
862
863 prb->ctrl = cpu_to_le16(ctrl);
864 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, prb->fis);
865
866 if (qc->flags & ATA_QCFLAG_DMAMAP)
867 sil24_fill_sg(qc, sge);
868 }
869
870 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc)
871 {
872 struct ata_port *ap = qc->ap;
873 struct sil24_port_priv *pp = ap->private_data;
874 void __iomem *port = sil24_port_base(ap);
875 unsigned int tag = sil24_tag(qc->tag);
876 dma_addr_t paddr;
877 void __iomem *activate;
878
879 paddr = pp->cmd_block_dma + tag * sizeof(*pp->cmd_block);
880 activate = port + PORT_CMD_ACTIVATE + tag * 8;
881
882 writel((u32)paddr, activate);
883 writel((u64)paddr >> 32, activate + 4);
884
885 return 0;
886 }
887
888 static bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc)
889 {
890 sil24_read_tf(qc->ap, qc->tag, &qc->result_tf);
891 return true;
892 }
893
894 static void sil24_pmp_attach(struct ata_port *ap)
895 {
896 u32 *gscr = ap->link.device->gscr;
897
898 sil24_config_pmp(ap, 1);
899 sil24_init_port(ap);
900
901 if (sata_pmp_gscr_vendor(gscr) == 0x11ab &&
902 sata_pmp_gscr_devid(gscr) == 0x4140) {
903 ata_port_printk(ap, KERN_INFO,
904 "disabling NCQ support due to sil24-mv4140 quirk\n");
905 ap->flags &= ~ATA_FLAG_NCQ;
906 }
907 }
908
909 static void sil24_pmp_detach(struct ata_port *ap)
910 {
911 sil24_init_port(ap);
912 sil24_config_pmp(ap, 0);
913
914 ap->flags |= ATA_FLAG_NCQ;
915 }
916
917 static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class,
918 unsigned long deadline)
919 {
920 int rc;
921
922 rc = sil24_init_port(link->ap);
923 if (rc) {
924 ata_link_printk(link, KERN_ERR,
925 "hardreset failed (port not ready)\n");
926 return rc;
927 }
928
929 return sata_std_hardreset(link, class, deadline);
930 }
931
932 static void sil24_freeze(struct ata_port *ap)
933 {
934 void __iomem *port = sil24_port_base(ap);
935
936 /* Port-wide IRQ mask in HOST_CTRL doesn't really work, clear
937 * PORT_IRQ_ENABLE instead.
938 */
939 writel(0xffff, port + PORT_IRQ_ENABLE_CLR);
940 }
941
942 static void sil24_thaw(struct ata_port *ap)
943 {
944 void __iomem *port = sil24_port_base(ap);
945 u32 tmp;
946
947 /* clear IRQ */
948 tmp = readl(port + PORT_IRQ_STAT);
949 writel(tmp, port + PORT_IRQ_STAT);
950
951 /* turn IRQ back on */
952 writel(DEF_PORT_IRQ, port + PORT_IRQ_ENABLE_SET);
953 }
954
955 static void sil24_error_intr(struct ata_port *ap)
956 {
957 void __iomem *port = sil24_port_base(ap);
958 struct sil24_port_priv *pp = ap->private_data;
959 struct ata_queued_cmd *qc = NULL;
960 struct ata_link *link;
961 struct ata_eh_info *ehi;
962 int abort = 0, freeze = 0;
963 u32 irq_stat;
964
965 /* on error, we need to clear IRQ explicitly */
966 irq_stat = readl(port + PORT_IRQ_STAT);
967 writel(irq_stat, port + PORT_IRQ_STAT);
968
969 /* first, analyze and record host port events */
970 link = &ap->link;
971 ehi = &link->eh_info;
972 ata_ehi_clear_desc(ehi);
973
974 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
975
976 if (irq_stat & PORT_IRQ_SDB_NOTIFY) {
977 ata_ehi_push_desc(ehi, "SDB notify");
978 sata_async_notification(ap);
979 }
980
981 if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) {
982 ata_ehi_hotplugged(ehi);
983 ata_ehi_push_desc(ehi, "%s",
984 irq_stat & PORT_IRQ_PHYRDY_CHG ?
985 "PHY RDY changed" : "device exchanged");
986 freeze = 1;
987 }
988
989 if (irq_stat & PORT_IRQ_UNK_FIS) {
990 ehi->err_mask |= AC_ERR_HSM;
991 ehi->action |= ATA_EH_RESET;
992 ata_ehi_push_desc(ehi, "unknown FIS");
993 freeze = 1;
994 }
995
996 /* deal with command error */
997 if (irq_stat & PORT_IRQ_ERROR) {
998 struct sil24_cerr_info *ci = NULL;
999 unsigned int err_mask = 0, action = 0;
1000 u32 context, cerr;
1001 int pmp;
1002
1003 abort = 1;
1004
1005 /* DMA Context Switch Failure in Port Multiplier Mode
1006 * errata. If we have active commands to 3 or more
1007 * devices, any error condition on active devices can
1008 * corrupt DMA context switching.
1009 */
1010 if (ap->nr_active_links >= 3) {
1011 ehi->err_mask |= AC_ERR_OTHER;
1012 ehi->action |= ATA_EH_RESET;
1013 ata_ehi_push_desc(ehi, "PMP DMA CS errata");
1014 pp->do_port_rst = 1;
1015 freeze = 1;
1016 }
1017
1018 /* find out the offending link and qc */
1019 if (sata_pmp_attached(ap)) {
1020 context = readl(port + PORT_CONTEXT);
1021 pmp = (context >> 5) & 0xf;
1022
1023 if (pmp < ap->nr_pmp_links) {
1024 link = &ap->pmp_link[pmp];
1025 ehi = &link->eh_info;
1026 qc = ata_qc_from_tag(ap, link->active_tag);
1027
1028 ata_ehi_clear_desc(ehi);
1029 ata_ehi_push_desc(ehi, "irq_stat 0x%08x",
1030 irq_stat);
1031 } else {
1032 err_mask |= AC_ERR_HSM;
1033 action |= ATA_EH_RESET;
1034 freeze = 1;
1035 }
1036 } else
1037 qc = ata_qc_from_tag(ap, link->active_tag);
1038
1039 /* analyze CMD_ERR */
1040 cerr = readl(port + PORT_CMD_ERR);
1041 if (cerr < ARRAY_SIZE(sil24_cerr_db))
1042 ci = &sil24_cerr_db[cerr];
1043
1044 if (ci && ci->desc) {
1045 err_mask |= ci->err_mask;
1046 action |= ci->action;
1047 if (action & ATA_EH_RESET)
1048 freeze = 1;
1049 ata_ehi_push_desc(ehi, "%s", ci->desc);
1050 } else {
1051 err_mask |= AC_ERR_OTHER;
1052 action |= ATA_EH_RESET;
1053 freeze = 1;
1054 ata_ehi_push_desc(ehi, "unknown command error %d",
1055 cerr);
1056 }
1057
1058 /* record error info */
1059 if (qc)
1060 qc->err_mask |= err_mask;
1061 else
1062 ehi->err_mask |= err_mask;
1063
1064 ehi->action |= action;
1065
1066 /* if PMP, resume */
1067 if (sata_pmp_attached(ap))
1068 writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_STAT);
1069 }
1070
1071 /* freeze or abort */
1072 if (freeze)
1073 ata_port_freeze(ap);
1074 else if (abort) {
1075 if (qc)
1076 ata_link_abort(qc->dev->link);
1077 else
1078 ata_port_abort(ap);
1079 }
1080 }
1081
1082 static inline void sil24_host_intr(struct ata_port *ap)
1083 {
1084 void __iomem *port = sil24_port_base(ap);
1085 u32 slot_stat, qc_active;
1086 int rc;
1087
1088 /* If PCIX_IRQ_WOC, there's an inherent race window between
1089 * clearing IRQ pending status and reading PORT_SLOT_STAT
1090 * which may cause spurious interrupts afterwards. This is
1091 * unavoidable and much better than losing interrupts which
1092 * happens if IRQ pending is cleared after reading
1093 * PORT_SLOT_STAT.
1094 */
1095 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC)
1096 writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT);
1097
1098 slot_stat = readl(port + PORT_SLOT_STAT);
1099
1100 if (unlikely(slot_stat & HOST_SSTAT_ATTN)) {
1101 sil24_error_intr(ap);
1102 return;
1103 }
1104
1105 qc_active = slot_stat & ~HOST_SSTAT_ATTN;
1106 rc = ata_qc_complete_multiple(ap, qc_active);
1107 if (rc > 0)
1108 return;
1109 if (rc < 0) {
1110 struct ata_eh_info *ehi = &ap->link.eh_info;
1111 ehi->err_mask |= AC_ERR_HSM;
1112 ehi->action |= ATA_EH_RESET;
1113 ata_port_freeze(ap);
1114 return;
1115 }
1116
1117 /* spurious interrupts are expected if PCIX_IRQ_WOC */
1118 if (!(ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) && ata_ratelimit())
1119 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
1120 "(slot_stat 0x%x active_tag %d sactive 0x%x)\n",
1121 slot_stat, ap->link.active_tag, ap->link.sactive);
1122 }
1123
1124 static irqreturn_t sil24_interrupt(int irq, void *dev_instance)
1125 {
1126 struct ata_host *host = dev_instance;
1127 void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
1128 unsigned handled = 0;
1129 u32 status;
1130 int i;
1131
1132 status = readl(host_base + HOST_IRQ_STAT);
1133
1134 if (status == 0xffffffff) {
1135 printk(KERN_ERR DRV_NAME ": IRQ status == 0xffffffff, "
1136 "PCI fault or device removal?\n");
1137 goto out;
1138 }
1139
1140 if (!(status & IRQ_STAT_4PORTS))
1141 goto out;
1142
1143 spin_lock(&host->lock);
1144
1145 for (i = 0; i < host->n_ports; i++)
1146 if (status & (1 << i)) {
1147 struct ata_port *ap = host->ports[i];
1148 if (ap && !(ap->flags & ATA_FLAG_DISABLED)) {
1149 sil24_host_intr(ap);
1150 handled++;
1151 } else
1152 printk(KERN_ERR DRV_NAME
1153 ": interrupt from disabled port %d\n", i);
1154 }
1155
1156 spin_unlock(&host->lock);
1157 out:
1158 return IRQ_RETVAL(handled);
1159 }
1160
1161 static void sil24_error_handler(struct ata_port *ap)
1162 {
1163 struct sil24_port_priv *pp = ap->private_data;
1164
1165 if (sil24_init_port(ap))
1166 ata_eh_freeze_port(ap);
1167
1168 sata_pmp_error_handler(ap);
1169
1170 pp->do_port_rst = 0;
1171 }
1172
1173 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc)
1174 {
1175 struct ata_port *ap = qc->ap;
1176
1177 /* make DMA engine forget about the failed command */
1178 if ((qc->flags & ATA_QCFLAG_FAILED) && sil24_init_port(ap))
1179 ata_eh_freeze_port(ap);
1180 }
1181
1182 static int sil24_port_start(struct ata_port *ap)
1183 {
1184 struct device *dev = ap->host->dev;
1185 struct sil24_port_priv *pp;
1186 union sil24_cmd_block *cb;
1187 size_t cb_size = sizeof(*cb) * SIL24_MAX_CMDS;
1188 dma_addr_t cb_dma;
1189
1190 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1191 if (!pp)
1192 return -ENOMEM;
1193
1194 cb = dmam_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL);
1195 if (!cb)
1196 return -ENOMEM;
1197 memset(cb, 0, cb_size);
1198
1199 pp->cmd_block = cb;
1200 pp->cmd_block_dma = cb_dma;
1201
1202 ap->private_data = pp;
1203
1204 ata_port_pbar_desc(ap, SIL24_HOST_BAR, -1, "host");
1205 ata_port_pbar_desc(ap, SIL24_PORT_BAR, sil24_port_offset(ap), "port");
1206
1207 return 0;
1208 }
1209
1210 static void sil24_init_controller(struct ata_host *host)
1211 {
1212 void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
1213 u32 tmp;
1214 int i;
1215
1216 /* GPIO off */
1217 writel(0, host_base + HOST_FLASH_CMD);
1218
1219 /* clear global reset & mask interrupts during initialization */
1220 writel(0, host_base + HOST_CTRL);
1221
1222 /* init ports */
1223 for (i = 0; i < host->n_ports; i++) {
1224 struct ata_port *ap = host->ports[i];
1225 void __iomem *port = sil24_port_base(ap);
1226
1227
1228 /* Initial PHY setting */
1229 writel(0x20c, port + PORT_PHY_CFG);
1230
1231 /* Clear port RST */
1232 tmp = readl(port + PORT_CTRL_STAT);
1233 if (tmp & PORT_CS_PORT_RST) {
1234 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
1235 tmp = ata_wait_register(port + PORT_CTRL_STAT,
1236 PORT_CS_PORT_RST,
1237 PORT_CS_PORT_RST, 10, 100);
1238 if (tmp & PORT_CS_PORT_RST)
1239 dev_printk(KERN_ERR, host->dev,
1240 "failed to clear port RST\n");
1241 }
1242
1243 /* configure port */
1244 sil24_config_port(ap);
1245 }
1246
1247 /* Turn on interrupts */
1248 writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL);
1249 }
1250
1251 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1252 {
1253 extern int __MARKER__sil24_cmd_block_is_sized_wrongly;
1254 static int printed_version;
1255 struct ata_port_info pi = sil24_port_info[ent->driver_data];
1256 const struct ata_port_info *ppi[] = { &pi, NULL };
1257 void __iomem * const *iomap;
1258 struct ata_host *host;
1259 int rc;
1260 u32 tmp;
1261
1262 /* cause link error if sil24_cmd_block is sized wrongly */
1263 if (sizeof(union sil24_cmd_block) != PAGE_SIZE)
1264 __MARKER__sil24_cmd_block_is_sized_wrongly = 1;
1265
1266 if (!printed_version++)
1267 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1268
1269 /* acquire resources */
1270 rc = pcim_enable_device(pdev);
1271 if (rc)
1272 return rc;
1273
1274 rc = pcim_iomap_regions(pdev,
1275 (1 << SIL24_HOST_BAR) | (1 << SIL24_PORT_BAR),
1276 DRV_NAME);
1277 if (rc)
1278 return rc;
1279 iomap = pcim_iomap_table(pdev);
1280
1281 /* apply workaround for completion IRQ loss on PCI-X errata */
1282 if (pi.flags & SIL24_FLAG_PCIX_IRQ_WOC) {
1283 tmp = readl(iomap[SIL24_HOST_BAR] + HOST_CTRL);
1284 if (tmp & (HOST_CTRL_TRDY | HOST_CTRL_STOP | HOST_CTRL_DEVSEL))
1285 dev_printk(KERN_INFO, &pdev->dev,
1286 "Applying completion IRQ loss on PCI-X "
1287 "errata fix\n");
1288 else
1289 pi.flags &= ~SIL24_FLAG_PCIX_IRQ_WOC;
1290 }
1291
1292 /* allocate and fill host */
1293 host = ata_host_alloc_pinfo(&pdev->dev, ppi,
1294 SIL24_FLAG2NPORTS(ppi[0]->flags));
1295 if (!host)
1296 return -ENOMEM;
1297 host->iomap = iomap;
1298
1299 /* configure and activate the device */
1300 if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1301 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1302 if (rc) {
1303 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1304 if (rc) {
1305 dev_printk(KERN_ERR, &pdev->dev,
1306 "64-bit DMA enable failed\n");
1307 return rc;
1308 }
1309 }
1310 } else {
1311 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1312 if (rc) {
1313 dev_printk(KERN_ERR, &pdev->dev,
1314 "32-bit DMA enable failed\n");
1315 return rc;
1316 }
1317 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1318 if (rc) {
1319 dev_printk(KERN_ERR, &pdev->dev,
1320 "32-bit consistent DMA enable failed\n");
1321 return rc;
1322 }
1323 }
1324
1325 /* Set max read request size to 4096. This slightly increases
1326 * write throughput for pci-e variants.
1327 */
1328 pcie_set_readrq(pdev, 4096);
1329
1330 sil24_init_controller(host);
1331
1332 pci_set_master(pdev);
1333 return ata_host_activate(host, pdev->irq, sil24_interrupt, IRQF_SHARED,
1334 &sil24_sht);
1335 }
1336
1337 #ifdef CONFIG_PM
1338 static int sil24_pci_device_resume(struct pci_dev *pdev)
1339 {
1340 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1341 void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
1342 int rc;
1343
1344 rc = ata_pci_device_do_resume(pdev);
1345 if (rc)
1346 return rc;
1347
1348 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND)
1349 writel(HOST_CTRL_GLOBAL_RST, host_base + HOST_CTRL);
1350
1351 sil24_init_controller(host);
1352
1353 ata_host_resume(host);
1354
1355 return 0;
1356 }
1357
1358 static int sil24_port_resume(struct ata_port *ap)
1359 {
1360 sil24_config_pmp(ap, ap->nr_pmp_links);
1361 return 0;
1362 }
1363 #endif
1364
1365 static int __init sil24_init(void)
1366 {
1367 return pci_register_driver(&sil24_pci_driver);
1368 }
1369
1370 static void __exit sil24_exit(void)
1371 {
1372 pci_unregister_driver(&sil24_pci_driver);
1373 }
1374
1375 MODULE_AUTHOR("Tejun Heo");
1376 MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver");
1377 MODULE_LICENSE("GPL");
1378 MODULE_DEVICE_TABLE(pci, sil24_pci_tbl);
1379
1380 module_init(sil24_init);
1381 module_exit(sil24_exit);
Support for the Chinese Samsung S3C2440 based development boards