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Staging: comedi: range.c: properly mark up __user pointers
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ata / sata_sil24.c
blob433b6b89c795e9ba2562b407d45d0805f2340622
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/gfp.h>
23 #include <linux/pci.h>
24 #include <linux/blkdev.h>
25 #include <linux/delay.h>
26 #include <linux/interrupt.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/device.h>
29 #include <scsi/scsi_host.h>
30 #include <scsi/scsi_cmnd.h>
31 #include <linux/libata.h>
32
33 #define DRV_NAME "sata_sil24"
34 #define DRV_VERSION "1.1"
35
36 /*
37 * Port request block (PRB) 32 bytes
38 */
39 struct sil24_prb {
40 __le16 ctrl;
41 __le16 prot;
42 __le32 rx_cnt;
43 u8 fis[6 * 4];
44 };
45
46 /*
47 * Scatter gather entry (SGE) 16 bytes
48 */
49 struct sil24_sge {
50 __le64 addr;
51 __le32 cnt;
52 __le32 flags;
53 };
54
55
56 enum {
57 SIL24_HOST_BAR = 0,
58 SIL24_PORT_BAR = 2,
59
60 /* sil24 fetches in chunks of 64bytes. The first block
61 * contains the PRB and two SGEs. From the second block, it's
62 * consisted of four SGEs and called SGT. Calculate the
63 * number of SGTs that fit into one page.
64 */
65 SIL24_PRB_SZ = sizeof(struct sil24_prb)
66 + 2 * sizeof(struct sil24_sge),
67 SIL24_MAX_SGT = (PAGE_SIZE - SIL24_PRB_SZ)
68 / (4 * sizeof(struct sil24_sge)),
69
70 /* This will give us one unused SGEs for ATA. This extra SGE
71 * will be used to store CDB for ATAPI devices.
72 */
73 SIL24_MAX_SGE = 4 * SIL24_MAX_SGT + 1,
74
75 /*
76 * Global controller registers (128 bytes @ BAR0)
77 */
78 /* 32 bit regs */
79 HOST_SLOT_STAT = 0x00, /* 32 bit slot stat * 4 */
80 HOST_CTRL = 0x40,
81 HOST_IRQ_STAT = 0x44,
82 HOST_PHY_CFG = 0x48,
83 HOST_BIST_CTRL = 0x50,
84 HOST_BIST_PTRN = 0x54,
85 HOST_BIST_STAT = 0x58,
86 HOST_MEM_BIST_STAT = 0x5c,
87 HOST_FLASH_CMD = 0x70,
88 /* 8 bit regs */
89 HOST_FLASH_DATA = 0x74,
90 HOST_TRANSITION_DETECT = 0x75,
91 HOST_GPIO_CTRL = 0x76,
92 HOST_I2C_ADDR = 0x78, /* 32 bit */
93 HOST_I2C_DATA = 0x7c,
94 HOST_I2C_XFER_CNT = 0x7e,
95 HOST_I2C_CTRL = 0x7f,
96
97 /* HOST_SLOT_STAT bits */
98 HOST_SSTAT_ATTN = (1 << 31),
99
100 /* HOST_CTRL bits */
101 HOST_CTRL_M66EN = (1 << 16), /* M66EN PCI bus signal */
102 HOST_CTRL_TRDY = (1 << 17), /* latched PCI TRDY */
103 HOST_CTRL_STOP = (1 << 18), /* latched PCI STOP */
104 HOST_CTRL_DEVSEL = (1 << 19), /* latched PCI DEVSEL */
105 HOST_CTRL_REQ64 = (1 << 20), /* latched PCI REQ64 */
106 HOST_CTRL_GLOBAL_RST = (1 << 31), /* global reset */
107
108 /*
109 * Port registers
110 * (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2)
111 */
112 PORT_REGS_SIZE = 0x2000,
113
114 PORT_LRAM = 0x0000, /* 31 LRAM slots and PMP regs */
115 PORT_LRAM_SLOT_SZ = 0x0080, /* 32 bytes PRB + 2 SGE, ACT... */
116
117 PORT_PMP = 0x0f80, /* 8 bytes PMP * 16 (128 bytes) */
118 PORT_PMP_STATUS = 0x0000, /* port device status offset */
119 PORT_PMP_QACTIVE = 0x0004, /* port device QActive offset */
120 PORT_PMP_SIZE = 0x0008, /* 8 bytes per PMP */
121
122 /* 32 bit regs */
123 PORT_CTRL_STAT = 0x1000, /* write: ctrl-set, read: stat */
124 PORT_CTRL_CLR = 0x1004, /* write: ctrl-clear */
125 PORT_IRQ_STAT = 0x1008, /* high: status, low: interrupt */
126 PORT_IRQ_ENABLE_SET = 0x1010, /* write: enable-set */
127 PORT_IRQ_ENABLE_CLR = 0x1014, /* write: enable-clear */
128 PORT_ACTIVATE_UPPER_ADDR= 0x101c,
129 PORT_EXEC_FIFO = 0x1020, /* command execution fifo */
130 PORT_CMD_ERR = 0x1024, /* command error number */
131 PORT_FIS_CFG = 0x1028,
132 PORT_FIFO_THRES = 0x102c,
133 /* 16 bit regs */
134 PORT_DECODE_ERR_CNT = 0x1040,
135 PORT_DECODE_ERR_THRESH = 0x1042,
136 PORT_CRC_ERR_CNT = 0x1044,
137 PORT_CRC_ERR_THRESH = 0x1046,
138 PORT_HSHK_ERR_CNT = 0x1048,
139 PORT_HSHK_ERR_THRESH = 0x104a,
140 /* 32 bit regs */
141 PORT_PHY_CFG = 0x1050,
142 PORT_SLOT_STAT = 0x1800,
143 PORT_CMD_ACTIVATE = 0x1c00, /* 64 bit cmd activate * 31 (248 bytes) */
144 PORT_CONTEXT = 0x1e04,
145 PORT_EXEC_DIAG = 0x1e00, /* 32bit exec diag * 16 (64 bytes, 0-10 used on 3124) */
146 PORT_PSD_DIAG = 0x1e40, /* 32bit psd diag * 16 (64 bytes, 0-8 used on 3124) */
147 PORT_SCONTROL = 0x1f00,
148 PORT_SSTATUS = 0x1f04,
149 PORT_SERROR = 0x1f08,
150 PORT_SACTIVE = 0x1f0c,
151
152 /* PORT_CTRL_STAT bits */
153 PORT_CS_PORT_RST = (1 << 0), /* port reset */
154 PORT_CS_DEV_RST = (1 << 1), /* device reset */
155 PORT_CS_INIT = (1 << 2), /* port initialize */
156 PORT_CS_IRQ_WOC = (1 << 3), /* interrupt write one to clear */
157 PORT_CS_CDB16 = (1 << 5), /* 0=12b cdb, 1=16b cdb */
158 PORT_CS_PMP_RESUME = (1 << 6), /* PMP resume */
159 PORT_CS_32BIT_ACTV = (1 << 10), /* 32-bit activation */
160 PORT_CS_PMP_EN = (1 << 13), /* port multiplier enable */
161 PORT_CS_RDY = (1 << 31), /* port ready to accept commands */
162
163 /* PORT_IRQ_STAT/ENABLE_SET/CLR */
164 /* bits[11:0] are masked */
165 PORT_IRQ_COMPLETE = (1 << 0), /* command(s) completed */
166 PORT_IRQ_ERROR = (1 << 1), /* command execution error */
167 PORT_IRQ_PORTRDY_CHG = (1 << 2), /* port ready change */
168 PORT_IRQ_PWR_CHG = (1 << 3), /* power management change */
169 PORT_IRQ_PHYRDY_CHG = (1 << 4), /* PHY ready change */
170 PORT_IRQ_COMWAKE = (1 << 5), /* COMWAKE received */
171 PORT_IRQ_UNK_FIS = (1 << 6), /* unknown FIS received */
172 PORT_IRQ_DEV_XCHG = (1 << 7), /* device exchanged */
173 PORT_IRQ_8B10B = (1 << 8), /* 8b/10b decode error threshold */
174 PORT_IRQ_CRC = (1 << 9), /* CRC error threshold */
175 PORT_IRQ_HANDSHAKE = (1 << 10), /* handshake error threshold */
176 PORT_IRQ_SDB_NOTIFY = (1 << 11), /* SDB notify received */
177
178 DEF_PORT_IRQ = PORT_IRQ_COMPLETE | PORT_IRQ_ERROR |
179 PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG |
180 PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_NOTIFY,
181
182 /* bits[27:16] are unmasked (raw) */
183 PORT_IRQ_RAW_SHIFT = 16,
184 PORT_IRQ_MASKED_MASK = 0x7ff,
185 PORT_IRQ_RAW_MASK = (0x7ff << PORT_IRQ_RAW_SHIFT),
186
187 /* ENABLE_SET/CLR specific, intr steering - 2 bit field */
188 PORT_IRQ_STEER_SHIFT = 30,
189 PORT_IRQ_STEER_MASK = (3 << PORT_IRQ_STEER_SHIFT),
190
191 /* PORT_CMD_ERR constants */
192 PORT_CERR_DEV = 1, /* Error bit in D2H Register FIS */
193 PORT_CERR_SDB = 2, /* Error bit in SDB FIS */
194 PORT_CERR_DATA = 3, /* Error in data FIS not detected by dev */
195 PORT_CERR_SEND = 4, /* Initial cmd FIS transmission failure */
196 PORT_CERR_INCONSISTENT = 5, /* Protocol mismatch */
197 PORT_CERR_DIRECTION = 6, /* Data direction mismatch */
198 PORT_CERR_UNDERRUN = 7, /* Ran out of SGEs while writing */
199 PORT_CERR_OVERRUN = 8, /* Ran out of SGEs while reading */
200 PORT_CERR_PKT_PROT = 11, /* DIR invalid in 1st PIO setup of ATAPI */
201 PORT_CERR_SGT_BOUNDARY = 16, /* PLD ecode 00 - SGT not on qword boundary */
202 PORT_CERR_SGT_TGTABRT = 17, /* PLD ecode 01 - target abort */
203 PORT_CERR_SGT_MSTABRT = 18, /* PLD ecode 10 - master abort */
204 PORT_CERR_SGT_PCIPERR = 19, /* PLD ecode 11 - PCI parity err while fetching SGT */
205 PORT_CERR_CMD_BOUNDARY = 24, /* ctrl[15:13] 001 - PRB not on qword boundary */
206 PORT_CERR_CMD_TGTABRT = 25, /* ctrl[15:13] 010 - target abort */
207 PORT_CERR_CMD_MSTABRT = 26, /* ctrl[15:13] 100 - master abort */
208 PORT_CERR_CMD_PCIPERR = 27, /* ctrl[15:13] 110 - PCI parity err while fetching PRB */
209 PORT_CERR_XFR_UNDEF = 32, /* PSD ecode 00 - undefined */
210 PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */
211 PORT_CERR_XFR_MSTABRT = 34, /* PSD ecode 10 - master abort */
212 PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */
213 PORT_CERR_SENDSERVICE = 36, /* FIS received while sending service */
214
215 /* bits of PRB control field */
216 PRB_CTRL_PROTOCOL = (1 << 0), /* override def. ATA protocol */
217 PRB_CTRL_PACKET_READ = (1 << 4), /* PACKET cmd read */
218 PRB_CTRL_PACKET_WRITE = (1 << 5), /* PACKET cmd write */
219 PRB_CTRL_NIEN = (1 << 6), /* Mask completion irq */
220 PRB_CTRL_SRST = (1 << 7), /* Soft reset request (ign BSY?) */
221
222 /* PRB protocol field */
223 PRB_PROT_PACKET = (1 << 0),
224 PRB_PROT_TCQ = (1 << 1),
225 PRB_PROT_NCQ = (1 << 2),
226 PRB_PROT_READ = (1 << 3),
227 PRB_PROT_WRITE = (1 << 4),
228 PRB_PROT_TRANSPARENT = (1 << 5),
229
230 /*
231 * Other constants
232 */
233 SGE_TRM = (1 << 31), /* Last SGE in chain */
234 SGE_LNK = (1 << 30), /* linked list
235 Points to SGT, not SGE */
236 SGE_DRD = (1 << 29), /* discard data read (/dev/null)
237 data address ignored */
238
239 SIL24_MAX_CMDS = 31,
240
241 /* board id */
242 BID_SIL3124 = 0,
243 BID_SIL3132 = 1,
244 BID_SIL3131 = 2,
245
246 /* host flags */
247 SIL24_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
248 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
249 ATA_FLAG_NCQ | ATA_FLAG_ACPI_SATA |
250 ATA_FLAG_AN | ATA_FLAG_PMP,
251 SIL24_FLAG_PCIX_IRQ_WOC = (1 << 24), /* IRQ loss errata on PCI-X */
252
253 IRQ_STAT_4PORTS = 0xf,
254 };
255
256 struct sil24_ata_block {
257 struct sil24_prb prb;
258 struct sil24_sge sge[SIL24_MAX_SGE];
259 };
260
261 struct sil24_atapi_block {
262 struct sil24_prb prb;
263 u8 cdb[16];
264 struct sil24_sge sge[SIL24_MAX_SGE];
265 };
266
267 union sil24_cmd_block {
268 struct sil24_ata_block ata;
269 struct sil24_atapi_block atapi;
270 };
271
272 static struct sil24_cerr_info {
273 unsigned int err_mask, action;
274 const char *desc;
275 } sil24_cerr_db[] = {
276 [0] = { AC_ERR_DEV, 0,
277 "device error" },
278 [PORT_CERR_DEV] = { AC_ERR_DEV, 0,
279 "device error via D2H FIS" },
280 [PORT_CERR_SDB] = { AC_ERR_DEV, 0,
281 "device error via SDB FIS" },
282 [PORT_CERR_DATA] = { AC_ERR_ATA_BUS, ATA_EH_RESET,
283 "error in data FIS" },
284 [PORT_CERR_SEND] = { AC_ERR_ATA_BUS, ATA_EH_RESET,
285 "failed to transmit command FIS" },
286 [PORT_CERR_INCONSISTENT] = { AC_ERR_HSM, ATA_EH_RESET,
287 "protocol mismatch" },
288 [PORT_CERR_DIRECTION] = { AC_ERR_HSM, ATA_EH_RESET,
289 "data directon mismatch" },
290 [PORT_CERR_UNDERRUN] = { AC_ERR_HSM, ATA_EH_RESET,
291 "ran out of SGEs while writing" },
292 [PORT_CERR_OVERRUN] = { AC_ERR_HSM, ATA_EH_RESET,
293 "ran out of SGEs while reading" },
294 [PORT_CERR_PKT_PROT] = { AC_ERR_HSM, ATA_EH_RESET,
295 "invalid data directon for ATAPI CDB" },
296 [PORT_CERR_SGT_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_RESET,
297 "SGT not on qword boundary" },
298 [PORT_CERR_SGT_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
299 "PCI target abort while fetching SGT" },
300 [PORT_CERR_SGT_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
301 "PCI master abort while fetching SGT" },
302 [PORT_CERR_SGT_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
303 "PCI parity error while fetching SGT" },
304 [PORT_CERR_CMD_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_RESET,
305 "PRB not on qword boundary" },
306 [PORT_CERR_CMD_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
307 "PCI target abort while fetching PRB" },
308 [PORT_CERR_CMD_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
309 "PCI master abort while fetching PRB" },
310 [PORT_CERR_CMD_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
311 "PCI parity error while fetching PRB" },
312 [PORT_CERR_XFR_UNDEF] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
313 "undefined error while transferring data" },
314 [PORT_CERR_XFR_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
315 "PCI target abort while transferring data" },
316 [PORT_CERR_XFR_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
317 "PCI master abort while transferring data" },
318 [PORT_CERR_XFR_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
319 "PCI parity error while transferring data" },
320 [PORT_CERR_SENDSERVICE] = { AC_ERR_HSM, ATA_EH_RESET,
321 "FIS received while sending service FIS" },
322 };
323
324 /*
325 * ap->private_data
326 *
327 * The preview driver always returned 0 for status. We emulate it
328 * here from the previous interrupt.
329 */
330 struct sil24_port_priv {
331 union sil24_cmd_block *cmd_block; /* 32 cmd blocks */
332 dma_addr_t cmd_block_dma; /* DMA base addr for them */
333 int do_port_rst;
334 };
335
336 static void sil24_dev_config(struct ata_device *dev);
337 static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val);
338 static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val);
339 static int sil24_qc_defer(struct ata_queued_cmd *qc);
340 static void sil24_qc_prep(struct ata_queued_cmd *qc);
341 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc);
342 static bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc);
343 static void sil24_pmp_attach(struct ata_port *ap);
344 static void sil24_pmp_detach(struct ata_port *ap);
345 static void sil24_freeze(struct ata_port *ap);
346 static void sil24_thaw(struct ata_port *ap);
347 static int sil24_softreset(struct ata_link *link, unsigned int *class,
348 unsigned long deadline);
349 static int sil24_hardreset(struct ata_link *link, unsigned int *class,
350 unsigned long deadline);
351 static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class,
352 unsigned long deadline);
353 static void sil24_error_handler(struct ata_port *ap);
354 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc);
355 static int sil24_port_start(struct ata_port *ap);
356 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
357 #ifdef CONFIG_PM
358 static int sil24_pci_device_resume(struct pci_dev *pdev);
359 static int sil24_port_resume(struct ata_port *ap);
360 #endif
361
362 static const struct pci_device_id sil24_pci_tbl[] = {
363 { PCI_VDEVICE(CMD, 0x3124), BID_SIL3124 },
364 { PCI_VDEVICE(INTEL, 0x3124), BID_SIL3124 },
365 { PCI_VDEVICE(CMD, 0x3132), BID_SIL3132 },
366 { PCI_VDEVICE(CMD, 0x0242), BID_SIL3132 },
367 { PCI_VDEVICE(CMD, 0x0244), BID_SIL3132 },
368 { PCI_VDEVICE(CMD, 0x3131), BID_SIL3131 },
369 { PCI_VDEVICE(CMD, 0x3531), BID_SIL3131 },
370
371 { } /* terminate list */
372 };
373
374 static struct pci_driver sil24_pci_driver = {
375 .name = DRV_NAME,
376 .id_table = sil24_pci_tbl,
377 .probe = sil24_init_one,
378 .remove = ata_pci_remove_one,
379 #ifdef CONFIG_PM
380 .suspend = ata_pci_device_suspend,
381 .resume = sil24_pci_device_resume,
382 #endif
383 };
384
385 static struct scsi_host_template sil24_sht = {
386 ATA_NCQ_SHT(DRV_NAME),
387 .can_queue = SIL24_MAX_CMDS,
388 .sg_tablesize = SIL24_MAX_SGE,
389 .dma_boundary = ATA_DMA_BOUNDARY,
390 };
391
392 static struct ata_port_operations sil24_ops = {
393 .inherits = &sata_pmp_port_ops,
394
395 .qc_defer = sil24_qc_defer,
396 .qc_prep = sil24_qc_prep,
397 .qc_issue = sil24_qc_issue,
398 .qc_fill_rtf = sil24_qc_fill_rtf,
399
400 .freeze = sil24_freeze,
401 .thaw = sil24_thaw,
402 .softreset = sil24_softreset,
403 .hardreset = sil24_hardreset,
404 .pmp_softreset = sil24_softreset,
405 .pmp_hardreset = sil24_pmp_hardreset,
406 .error_handler = sil24_error_handler,
407 .post_internal_cmd = sil24_post_internal_cmd,
408 .dev_config = sil24_dev_config,
409
410 .scr_read = sil24_scr_read,
411 .scr_write = sil24_scr_write,
412 .pmp_attach = sil24_pmp_attach,
413 .pmp_detach = sil24_pmp_detach,
414
415 .port_start = sil24_port_start,
416 #ifdef CONFIG_PM
417 .port_resume = sil24_port_resume,
418 #endif
419 };
420
421 static int sata_sil24_msi; /* Disable MSI */
422 module_param_named(msi, sata_sil24_msi, bool, S_IRUGO);
423 MODULE_PARM_DESC(msi, "Enable MSI (Default: false)");
424
425 /*
426 * Use bits 30-31 of port_flags to encode available port numbers.
427 * Current maxium is 4.
428 */
429 #define SIL24_NPORTS2FLAG(nports) ((((unsigned)(nports) - 1) & 0x3) << 30)
430 #define SIL24_FLAG2NPORTS(flag) ((((flag) >> 30) & 0x3) + 1)
431
432 static const struct ata_port_info sil24_port_info[] = {
433 /* sil_3124 */
434 {
435 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(4) |
436 SIL24_FLAG_PCIX_IRQ_WOC,
437 .pio_mask = ATA_PIO4,
438 .mwdma_mask = ATA_MWDMA2,
439 .udma_mask = ATA_UDMA5,
440 .port_ops = &sil24_ops,
441 },
442 /* sil_3132 */
443 {
444 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2),
445 .pio_mask = ATA_PIO4,
446 .mwdma_mask = ATA_MWDMA2,
447 .udma_mask = ATA_UDMA5,
448 .port_ops = &sil24_ops,
449 },
450 /* sil_3131/sil_3531 */
451 {
452 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1),
453 .pio_mask = ATA_PIO4,
454 .mwdma_mask = ATA_MWDMA2,
455 .udma_mask = ATA_UDMA5,
456 .port_ops = &sil24_ops,
457 },
458 };
459
460 static int sil24_tag(int tag)
461 {
462 if (unlikely(ata_tag_internal(tag)))
463 return 0;
464 return tag;
465 }
466
467 static unsigned long sil24_port_offset(struct ata_port *ap)
468 {
469 return ap->port_no * PORT_REGS_SIZE;
470 }
471
472 static void __iomem *sil24_port_base(struct ata_port *ap)
473 {
474 return ap->host->iomap[SIL24_PORT_BAR] + sil24_port_offset(ap);
475 }
476
477 static void sil24_dev_config(struct ata_device *dev)
478 {
479 void __iomem *port = sil24_port_base(dev->link->ap);
480
481 if (dev->cdb_len == 16)
482 writel(PORT_CS_CDB16, port + PORT_CTRL_STAT);
483 else
484 writel(PORT_CS_CDB16, port + PORT_CTRL_CLR);
485 }
486
487 static void sil24_read_tf(struct ata_port *ap, int tag, struct ata_taskfile *tf)
488 {
489 void __iomem *port = sil24_port_base(ap);
490 struct sil24_prb __iomem *prb;
491 u8 fis[6 * 4];
492
493 prb = port + PORT_LRAM + sil24_tag(tag) * PORT_LRAM_SLOT_SZ;
494 memcpy_fromio(fis, prb->fis, sizeof(fis));
495 ata_tf_from_fis(fis, tf);
496 }
497
498 static int sil24_scr_map[] = {
499 [SCR_CONTROL] = 0,
500 [SCR_STATUS] = 1,
501 [SCR_ERROR] = 2,
502 [SCR_ACTIVE] = 3,
503 };
504
505 static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val)
506 {
507 void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL;
508
509 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
510 void __iomem *addr;
511 addr = scr_addr + sil24_scr_map[sc_reg] * 4;
512 *val = readl(scr_addr + sil24_scr_map[sc_reg] * 4);
513 return 0;
514 }
515 return -EINVAL;
516 }
517
518 static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val)
519 {
520 void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL;
521
522 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
523 void __iomem *addr;
524 addr = scr_addr + sil24_scr_map[sc_reg] * 4;
525 writel(val, scr_addr + sil24_scr_map[sc_reg] * 4);
526 return 0;
527 }
528 return -EINVAL;
529 }
530
531 static void sil24_config_port(struct ata_port *ap)
532 {
533 void __iomem *port = sil24_port_base(ap);
534
535 /* configure IRQ WoC */
536 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC)
537 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_STAT);
538 else
539 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR);
540
541 /* zero error counters. */
542 writel(0x8000, port + PORT_DECODE_ERR_THRESH);
543 writel(0x8000, port + PORT_CRC_ERR_THRESH);
544 writel(0x8000, port + PORT_HSHK_ERR_THRESH);
545 writel(0x0000, port + PORT_DECODE_ERR_CNT);
546 writel(0x0000, port + PORT_CRC_ERR_CNT);
547 writel(0x0000, port + PORT_HSHK_ERR_CNT);
548
549 /* always use 64bit activation */
550 writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_CLR);
551
552 /* clear port multiplier enable and resume bits */
553 writel(PORT_CS_PMP_EN | PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR);
554 }
555
556 static void sil24_config_pmp(struct ata_port *ap, int attached)
557 {
558 void __iomem *port = sil24_port_base(ap);
559
560 if (attached)
561 writel(PORT_CS_PMP_EN, port + PORT_CTRL_STAT);
562 else
563 writel(PORT_CS_PMP_EN, port + PORT_CTRL_CLR);
564 }
565
566 static void sil24_clear_pmp(struct ata_port *ap)
567 {
568 void __iomem *port = sil24_port_base(ap);
569 int i;
570
571 writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR);
572
573 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) {
574 void __iomem *pmp_base = port + PORT_PMP + i * PORT_PMP_SIZE;
575
576 writel(0, pmp_base + PORT_PMP_STATUS);
577 writel(0, pmp_base + PORT_PMP_QACTIVE);
578 }
579 }
580
581 static int sil24_init_port(struct ata_port *ap)
582 {
583 void __iomem *port = sil24_port_base(ap);
584 struct sil24_port_priv *pp = ap->private_data;
585 u32 tmp;
586
587 /* clear PMP error status */
588 if (sata_pmp_attached(ap))
589 sil24_clear_pmp(ap);
590
591 writel(PORT_CS_INIT, port + PORT_CTRL_STAT);
592 ata_wait_register(port + PORT_CTRL_STAT,
593 PORT_CS_INIT, PORT_CS_INIT, 10, 100);
594 tmp = ata_wait_register(port + PORT_CTRL_STAT,
595 PORT_CS_RDY, 0, 10, 100);
596
597 if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY) {
598 pp->do_port_rst = 1;
599 ap->link.eh_context.i.action |= ATA_EH_RESET;
600 return -EIO;
601 }
602
603 return 0;
604 }
605
606 static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp,
607 const struct ata_taskfile *tf,
608 int is_cmd, u32 ctrl,
609 unsigned long timeout_msec)
610 {
611 void __iomem *port = sil24_port_base(ap);
612 struct sil24_port_priv *pp = ap->private_data;
613 struct sil24_prb *prb = &pp->cmd_block[0].ata.prb;
614 dma_addr_t paddr = pp->cmd_block_dma;
615 u32 irq_enabled, irq_mask, irq_stat;
616 int rc;
617
618 prb->ctrl = cpu_to_le16(ctrl);
619 ata_tf_to_fis(tf, pmp, is_cmd, prb->fis);
620
621 /* temporarily plug completion and error interrupts */
622 irq_enabled = readl(port + PORT_IRQ_ENABLE_SET);
623 writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR, port + PORT_IRQ_ENABLE_CLR);
624
625 writel((u32)paddr, port + PORT_CMD_ACTIVATE);
626 writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4);
627
628 irq_mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT;
629 irq_stat = ata_wait_register(port + PORT_IRQ_STAT, irq_mask, 0x0,
630 10, timeout_msec);
631
632 writel(irq_mask, port + PORT_IRQ_STAT); /* clear IRQs */
633 irq_stat >>= PORT_IRQ_RAW_SHIFT;
634
635 if (irq_stat & PORT_IRQ_COMPLETE)
636 rc = 0;
637 else {
638 /* force port into known state */
639 sil24_init_port(ap);
640
641 if (irq_stat & PORT_IRQ_ERROR)
642 rc = -EIO;
643 else
644 rc = -EBUSY;
645 }
646
647 /* restore IRQ enabled */
648 writel(irq_enabled, port + PORT_IRQ_ENABLE_SET);
649
650 return rc;
651 }
652
653 static int sil24_softreset(struct ata_link *link, unsigned int *class,
654 unsigned long deadline)
655 {
656 struct ata_port *ap = link->ap;
657 int pmp = sata_srst_pmp(link);
658 unsigned long timeout_msec = 0;
659 struct ata_taskfile tf;
660 const char *reason;
661 int rc;
662
663 DPRINTK("ENTER\n");
664
665 /* put the port into known state */
666 if (sil24_init_port(ap)) {
667 reason = "port not ready";
668 goto err;
669 }
670
671 /* do SRST */
672 if (time_after(deadline, jiffies))
673 timeout_msec = jiffies_to_msecs(deadline - jiffies);
674
675 ata_tf_init(link->device, &tf); /* doesn't really matter */
676 rc = sil24_exec_polled_cmd(ap, pmp, &tf, 0, PRB_CTRL_SRST,
677 timeout_msec);
678 if (rc == -EBUSY) {
679 reason = "timeout";
680 goto err;
681 } else if (rc) {
682 reason = "SRST command error";
683 goto err;
684 }
685
686 sil24_read_tf(ap, 0, &tf);
687 *class = ata_dev_classify(&tf);
688
689 DPRINTK("EXIT, class=%u\n", *class);
690 return 0;
691
692 err:
693 ata_link_printk(link, KERN_ERR, "softreset failed (%s)\n", reason);
694 return -EIO;
695 }
696
697 static int sil24_hardreset(struct ata_link *link, unsigned int *class,
698 unsigned long deadline)
699 {
700 struct ata_port *ap = link->ap;
701 void __iomem *port = sil24_port_base(ap);
702 struct sil24_port_priv *pp = ap->private_data;
703 int did_port_rst = 0;
704 const char *reason;
705 int tout_msec, rc;
706 u32 tmp;
707
708 retry:
709 /* Sometimes, DEV_RST is not enough to recover the controller.
710 * This happens often after PM DMA CS errata.
711 */
712 if (pp->do_port_rst) {
713 ata_port_printk(ap, KERN_WARNING, "controller in dubious "
714 "state, performing PORT_RST\n");
715
716 writel(PORT_CS_PORT_RST, port + PORT_CTRL_STAT);
717 msleep(10);
718 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
719 ata_wait_register(port + PORT_CTRL_STAT, PORT_CS_RDY, 0,
720 10, 5000);
721
722 /* restore port configuration */
723 sil24_config_port(ap);
724 sil24_config_pmp(ap, ap->nr_pmp_links);
725
726 pp->do_port_rst = 0;
727 did_port_rst = 1;
728 }
729
730 /* sil24 does the right thing(tm) without any protection */
731 sata_set_spd(link);
732
733 tout_msec = 100;
734 if (ata_link_online(link))
735 tout_msec = 5000;
736
737 writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT);
738 tmp = ata_wait_register(port + PORT_CTRL_STAT,
739 PORT_CS_DEV_RST, PORT_CS_DEV_RST, 10,
740 tout_msec);
741
742 /* SStatus oscillates between zero and valid status after
743 * DEV_RST, debounce it.
744 */
745 rc = sata_link_debounce(link, sata_deb_timing_long, deadline);
746 if (rc) {
747 reason = "PHY debouncing failed";
748 goto err;
749 }
750
751 if (tmp & PORT_CS_DEV_RST) {
752 if (ata_link_offline(link))
753 return 0;
754 reason = "link not ready";
755 goto err;
756 }
757
758 /* Sil24 doesn't store signature FIS after hardreset, so we
759 * can't wait for BSY to clear. Some devices take a long time
760 * to get ready and those devices will choke if we don't wait
761 * for BSY clearance here. Tell libata to perform follow-up
762 * softreset.
763 */
764 return -EAGAIN;
765
766 err:
767 if (!did_port_rst) {
768 pp->do_port_rst = 1;
769 goto retry;
770 }
771
772 ata_link_printk(link, KERN_ERR, "hardreset failed (%s)\n", reason);
773 return -EIO;
774 }
775
776 static inline void sil24_fill_sg(struct ata_queued_cmd *qc,
777 struct sil24_sge *sge)
778 {
779 struct scatterlist *sg;
780 struct sil24_sge *last_sge = NULL;
781 unsigned int si;
782
783 for_each_sg(qc->sg, sg, qc->n_elem, si) {
784 sge->addr = cpu_to_le64(sg_dma_address(sg));
785 sge->cnt = cpu_to_le32(sg_dma_len(sg));
786 sge->flags = 0;
787
788 last_sge = sge;
789 sge++;
790 }
791
792 last_sge->flags = cpu_to_le32(SGE_TRM);
793 }
794
795 static int sil24_qc_defer(struct ata_queued_cmd *qc)
796 {
797 struct ata_link *link = qc->dev->link;
798 struct ata_port *ap = link->ap;
799 u8 prot = qc->tf.protocol;
800
801 /*
802 * There is a bug in the chip:
803 * Port LRAM Causes the PRB/SGT Data to be Corrupted
804 * If the host issues a read request for LRAM and SActive registers
805 * while active commands are available in the port, PRB/SGT data in
806 * the LRAM can become corrupted. This issue applies only when
807 * reading from, but not writing to, the LRAM.
808 *
809 * Therefore, reading LRAM when there is no particular error [and
810 * other commands may be outstanding] is prohibited.
811 *
812 * To avoid this bug there are two situations where a command must run
813 * exclusive of any other commands on the port:
814 *
815 * - ATAPI commands which check the sense data
816 * - Passthrough ATA commands which always have ATA_QCFLAG_RESULT_TF
817 * set.
818 *
819 */
820 int is_excl = (ata_is_atapi(prot) ||
821 (qc->flags & ATA_QCFLAG_RESULT_TF));
822
823 if (unlikely(ap->excl_link)) {
824 if (link == ap->excl_link) {
825 if (ap->nr_active_links)
826 return ATA_DEFER_PORT;
827 qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
828 } else
829 return ATA_DEFER_PORT;
830 } else if (unlikely(is_excl)) {
831 ap->excl_link = link;
832 if (ap->nr_active_links)
833 return ATA_DEFER_PORT;
834 qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
835 }
836
837 return ata_std_qc_defer(qc);
838 }
839
840 static void sil24_qc_prep(struct ata_queued_cmd *qc)
841 {
842 struct ata_port *ap = qc->ap;
843 struct sil24_port_priv *pp = ap->private_data;
844 union sil24_cmd_block *cb;
845 struct sil24_prb *prb;
846 struct sil24_sge *sge;
847 u16 ctrl = 0;
848
849 cb = &pp->cmd_block[sil24_tag(qc->tag)];
850
851 if (!ata_is_atapi(qc->tf.protocol)) {
852 prb = &cb->ata.prb;
853 sge = cb->ata.sge;
854 if (ata_is_data(qc->tf.protocol)) {
855 u16 prot = 0;
856 ctrl = PRB_CTRL_PROTOCOL;
857 if (ata_is_ncq(qc->tf.protocol))
858 prot |= PRB_PROT_NCQ;
859 if (qc->tf.flags & ATA_TFLAG_WRITE)
860 prot |= PRB_PROT_WRITE;
861 else
862 prot |= PRB_PROT_READ;
863 prb->prot = cpu_to_le16(prot);
864 }
865 } else {
866 prb = &cb->atapi.prb;
867 sge = cb->atapi.sge;
868 memset(cb->atapi.cdb, 0, 32);
869 memcpy(cb->atapi.cdb, qc->cdb, qc->dev->cdb_len);
870
871 if (ata_is_data(qc->tf.protocol)) {
872 if (qc->tf.flags & ATA_TFLAG_WRITE)
873 ctrl = PRB_CTRL_PACKET_WRITE;
874 else
875 ctrl = PRB_CTRL_PACKET_READ;
876 }
877 }
878
879 prb->ctrl = cpu_to_le16(ctrl);
880 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, prb->fis);
881
882 if (qc->flags & ATA_QCFLAG_DMAMAP)
883 sil24_fill_sg(qc, sge);
884 }
885
886 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc)
887 {
888 struct ata_port *ap = qc->ap;
889 struct sil24_port_priv *pp = ap->private_data;
890 void __iomem *port = sil24_port_base(ap);
891 unsigned int tag = sil24_tag(qc->tag);
892 dma_addr_t paddr;
893 void __iomem *activate;
894
895 paddr = pp->cmd_block_dma + tag * sizeof(*pp->cmd_block);
896 activate = port + PORT_CMD_ACTIVATE + tag * 8;
897
898 writel((u32)paddr, activate);
899 writel((u64)paddr >> 32, activate + 4);
900
901 return 0;
902 }
903
904 static bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc)
905 {
906 sil24_read_tf(qc->ap, qc->tag, &qc->result_tf);
907 return true;
908 }
909
910 static void sil24_pmp_attach(struct ata_port *ap)
911 {
912 u32 *gscr = ap->link.device->gscr;
913
914 sil24_config_pmp(ap, 1);
915 sil24_init_port(ap);
916
917 if (sata_pmp_gscr_vendor(gscr) == 0x11ab &&
918 sata_pmp_gscr_devid(gscr) == 0x4140) {
919 ata_port_printk(ap, KERN_INFO,
920 "disabling NCQ support due to sil24-mv4140 quirk\n");
921 ap->flags &= ~ATA_FLAG_NCQ;
922 }
923 }
924
925 static void sil24_pmp_detach(struct ata_port *ap)
926 {
927 sil24_init_port(ap);
928 sil24_config_pmp(ap, 0);
929
930 ap->flags |= ATA_FLAG_NCQ;
931 }
932
933 static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class,
934 unsigned long deadline)
935 {
936 int rc;
937
938 rc = sil24_init_port(link->ap);
939 if (rc) {
940 ata_link_printk(link, KERN_ERR,
941 "hardreset failed (port not ready)\n");
942 return rc;
943 }
944
945 return sata_std_hardreset(link, class, deadline);
946 }
947
948 static void sil24_freeze(struct ata_port *ap)
949 {
950 void __iomem *port = sil24_port_base(ap);
951
952 /* Port-wide IRQ mask in HOST_CTRL doesn't really work, clear
953 * PORT_IRQ_ENABLE instead.
954 */
955 writel(0xffff, port + PORT_IRQ_ENABLE_CLR);
956 }
957
958 static void sil24_thaw(struct ata_port *ap)
959 {
960 void __iomem *port = sil24_port_base(ap);
961 u32 tmp;
962
963 /* clear IRQ */
964 tmp = readl(port + PORT_IRQ_STAT);
965 writel(tmp, port + PORT_IRQ_STAT);
966
967 /* turn IRQ back on */
968 writel(DEF_PORT_IRQ, port + PORT_IRQ_ENABLE_SET);
969 }
970
971 static void sil24_error_intr(struct ata_port *ap)
972 {
973 void __iomem *port = sil24_port_base(ap);
974 struct sil24_port_priv *pp = ap->private_data;
975 struct ata_queued_cmd *qc = NULL;
976 struct ata_link *link;
977 struct ata_eh_info *ehi;
978 int abort = 0, freeze = 0;
979 u32 irq_stat;
980
981 /* on error, we need to clear IRQ explicitly */
982 irq_stat = readl(port + PORT_IRQ_STAT);
983 writel(irq_stat, port + PORT_IRQ_STAT);
984
985 /* first, analyze and record host port events */
986 link = &ap->link;
987 ehi = &link->eh_info;
988 ata_ehi_clear_desc(ehi);
989
990 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
991
992 if (irq_stat & PORT_IRQ_SDB_NOTIFY) {
993 ata_ehi_push_desc(ehi, "SDB notify");
994 sata_async_notification(ap);
995 }
996
997 if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) {
998 ata_ehi_hotplugged(ehi);
999 ata_ehi_push_desc(ehi, "%s",
1000 irq_stat & PORT_IRQ_PHYRDY_CHG ?
1001 "PHY RDY changed" : "device exchanged");
1002 freeze = 1;
1003 }
1004
1005 if (irq_stat & PORT_IRQ_UNK_FIS) {
1006 ehi->err_mask |= AC_ERR_HSM;
1007 ehi->action |= ATA_EH_RESET;
1008 ata_ehi_push_desc(ehi, "unknown FIS");
1009 freeze = 1;
1010 }
1011
1012 /* deal with command error */
1013 if (irq_stat & PORT_IRQ_ERROR) {
1014 struct sil24_cerr_info *ci = NULL;
1015 unsigned int err_mask = 0, action = 0;
1016 u32 context, cerr;
1017 int pmp;
1018
1019 abort = 1;
1020
1021 /* DMA Context Switch Failure in Port Multiplier Mode
1022 * errata. If we have active commands to 3 or more
1023 * devices, any error condition on active devices can
1024 * corrupt DMA context switching.
1025 */
1026 if (ap->nr_active_links >= 3) {
1027 ehi->err_mask |= AC_ERR_OTHER;
1028 ehi->action |= ATA_EH_RESET;
1029 ata_ehi_push_desc(ehi, "PMP DMA CS errata");
1030 pp->do_port_rst = 1;
1031 freeze = 1;
1032 }
1033
1034 /* find out the offending link and qc */
1035 if (sata_pmp_attached(ap)) {
1036 context = readl(port + PORT_CONTEXT);
1037 pmp = (context >> 5) & 0xf;
1038
1039 if (pmp < ap->nr_pmp_links) {
1040 link = &ap->pmp_link[pmp];
1041 ehi = &link->eh_info;
1042 qc = ata_qc_from_tag(ap, link->active_tag);
1043
1044 ata_ehi_clear_desc(ehi);
1045 ata_ehi_push_desc(ehi, "irq_stat 0x%08x",
1046 irq_stat);
1047 } else {
1048 err_mask |= AC_ERR_HSM;
1049 action |= ATA_EH_RESET;
1050 freeze = 1;
1051 }
1052 } else
1053 qc = ata_qc_from_tag(ap, link->active_tag);
1054
1055 /* analyze CMD_ERR */
1056 cerr = readl(port + PORT_CMD_ERR);
1057 if (cerr < ARRAY_SIZE(sil24_cerr_db))
1058 ci = &sil24_cerr_db[cerr];
1059
1060 if (ci && ci->desc) {
1061 err_mask |= ci->err_mask;
1062 action |= ci->action;
1063 if (action & ATA_EH_RESET)
1064 freeze = 1;
1065 ata_ehi_push_desc(ehi, "%s", ci->desc);
1066 } else {
1067 err_mask |= AC_ERR_OTHER;
1068 action |= ATA_EH_RESET;
1069 freeze = 1;
1070 ata_ehi_push_desc(ehi, "unknown command error %d",
1071 cerr);
1072 }
1073
1074 /* record error info */
1075 if (qc)
1076 qc->err_mask |= err_mask;
1077 else
1078 ehi->err_mask |= err_mask;
1079
1080 ehi->action |= action;
1081
1082 /* if PMP, resume */
1083 if (sata_pmp_attached(ap))
1084 writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_STAT);
1085 }
1086
1087 /* freeze or abort */
1088 if (freeze)
1089 ata_port_freeze(ap);
1090 else if (abort) {
1091 if (qc)
1092 ata_link_abort(qc->dev->link);
1093 else
1094 ata_port_abort(ap);
1095 }
1096 }
1097
1098 static inline void sil24_host_intr(struct ata_port *ap)
1099 {
1100 void __iomem *port = sil24_port_base(ap);
1101 u32 slot_stat, qc_active;
1102 int rc;
1103
1104 /* If PCIX_IRQ_WOC, there's an inherent race window between
1105 * clearing IRQ pending status and reading PORT_SLOT_STAT
1106 * which may cause spurious interrupts afterwards. This is
1107 * unavoidable and much better than losing interrupts which
1108 * happens if IRQ pending is cleared after reading
1109 * PORT_SLOT_STAT.
1110 */
1111 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC)
1112 writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT);
1113
1114 slot_stat = readl(port + PORT_SLOT_STAT);
1115
1116 if (unlikely(slot_stat & HOST_SSTAT_ATTN)) {
1117 sil24_error_intr(ap);
1118 return;
1119 }
1120
1121 qc_active = slot_stat & ~HOST_SSTAT_ATTN;
1122 rc = ata_qc_complete_multiple(ap, qc_active);
1123 if (rc > 0)
1124 return;
1125 if (rc < 0) {
1126 struct ata_eh_info *ehi = &ap->link.eh_info;
1127 ehi->err_mask |= AC_ERR_HSM;
1128 ehi->action |= ATA_EH_RESET;
1129 ata_port_freeze(ap);
1130 return;
1131 }
1132
1133 /* spurious interrupts are expected if PCIX_IRQ_WOC */
1134 if (!(ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) && ata_ratelimit())
1135 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
1136 "(slot_stat 0x%x active_tag %d sactive 0x%x)\n",
1137 slot_stat, ap->link.active_tag, ap->link.sactive);
1138 }
1139
1140 static irqreturn_t sil24_interrupt(int irq, void *dev_instance)
1141 {
1142 struct ata_host *host = dev_instance;
1143 void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
1144 unsigned handled = 0;
1145 u32 status;
1146 int i;
1147
1148 status = readl(host_base + HOST_IRQ_STAT);
1149
1150 if (status == 0xffffffff) {
1151 printk(KERN_ERR DRV_NAME ": IRQ status == 0xffffffff, "
1152 "PCI fault or device removal?\n");
1153 goto out;
1154 }
1155
1156 if (!(status & IRQ_STAT_4PORTS))
1157 goto out;
1158
1159 spin_lock(&host->lock);
1160
1161 for (i = 0; i < host->n_ports; i++)
1162 if (status & (1 << i)) {
1163 struct ata_port *ap = host->ports[i];
1164 if (ap && !(ap->flags & ATA_FLAG_DISABLED)) {
1165 sil24_host_intr(ap);
1166 handled++;
1167 } else
1168 printk(KERN_ERR DRV_NAME
1169 ": interrupt from disabled port %d\n", i);
1170 }
1171
1172 spin_unlock(&host->lock);
1173 out:
1174 return IRQ_RETVAL(handled);
1175 }
1176
1177 static void sil24_error_handler(struct ata_port *ap)
1178 {
1179 struct sil24_port_priv *pp = ap->private_data;
1180
1181 if (sil24_init_port(ap))
1182 ata_eh_freeze_port(ap);
1183
1184 sata_pmp_error_handler(ap);
1185
1186 pp->do_port_rst = 0;
1187 }
1188
1189 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc)
1190 {
1191 struct ata_port *ap = qc->ap;
1192
1193 /* make DMA engine forget about the failed command */
1194 if ((qc->flags & ATA_QCFLAG_FAILED) && sil24_init_port(ap))
1195 ata_eh_freeze_port(ap);
1196 }
1197
1198 static int sil24_port_start(struct ata_port *ap)
1199 {
1200 struct device *dev = ap->host->dev;
1201 struct sil24_port_priv *pp;
1202 union sil24_cmd_block *cb;
1203 size_t cb_size = sizeof(*cb) * SIL24_MAX_CMDS;
1204 dma_addr_t cb_dma;
1205
1206 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1207 if (!pp)
1208 return -ENOMEM;
1209
1210 cb = dmam_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL);
1211 if (!cb)
1212 return -ENOMEM;
1213 memset(cb, 0, cb_size);
1214
1215 pp->cmd_block = cb;
1216 pp->cmd_block_dma = cb_dma;
1217
1218 ap->private_data = pp;
1219
1220 ata_port_pbar_desc(ap, SIL24_HOST_BAR, -1, "host");
1221 ata_port_pbar_desc(ap, SIL24_PORT_BAR, sil24_port_offset(ap), "port");
1222
1223 return 0;
1224 }
1225
1226 static void sil24_init_controller(struct ata_host *host)
1227 {
1228 void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
1229 u32 tmp;
1230 int i;
1231
1232 /* GPIO off */
1233 writel(0, host_base + HOST_FLASH_CMD);
1234
1235 /* clear global reset & mask interrupts during initialization */
1236 writel(0, host_base + HOST_CTRL);
1237
1238 /* init ports */
1239 for (i = 0; i < host->n_ports; i++) {
1240 struct ata_port *ap = host->ports[i];
1241 void __iomem *port = sil24_port_base(ap);
1242
1243
1244 /* Initial PHY setting */
1245 writel(0x20c, port + PORT_PHY_CFG);
1246
1247 /* Clear port RST */
1248 tmp = readl(port + PORT_CTRL_STAT);
1249 if (tmp & PORT_CS_PORT_RST) {
1250 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
1251 tmp = ata_wait_register(port + PORT_CTRL_STAT,
1252 PORT_CS_PORT_RST,
1253 PORT_CS_PORT_RST, 10, 100);
1254 if (tmp & PORT_CS_PORT_RST)
1255 dev_printk(KERN_ERR, host->dev,
1256 "failed to clear port RST\n");
1257 }
1258
1259 /* configure port */
1260 sil24_config_port(ap);
1261 }
1262
1263 /* Turn on interrupts */
1264 writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL);
1265 }
1266
1267 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1268 {
1269 extern int __MARKER__sil24_cmd_block_is_sized_wrongly;
1270 static int printed_version;
1271 struct ata_port_info pi = sil24_port_info[ent->driver_data];
1272 const struct ata_port_info *ppi[] = { &pi, NULL };
1273 void __iomem * const *iomap;
1274 struct ata_host *host;
1275 int rc;
1276 u32 tmp;
1277
1278 /* cause link error if sil24_cmd_block is sized wrongly */
1279 if (sizeof(union sil24_cmd_block) != PAGE_SIZE)
1280 __MARKER__sil24_cmd_block_is_sized_wrongly = 1;
1281
1282 if (!printed_version++)
1283 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1284
1285 /* acquire resources */
1286 rc = pcim_enable_device(pdev);
1287 if (rc)
1288 return rc;
1289
1290 rc = pcim_iomap_regions(pdev,
1291 (1 << SIL24_HOST_BAR) | (1 << SIL24_PORT_BAR),
1292 DRV_NAME);
1293 if (rc)
1294 return rc;
1295 iomap = pcim_iomap_table(pdev);
1296
1297 /* apply workaround for completion IRQ loss on PCI-X errata */
1298 if (pi.flags & SIL24_FLAG_PCIX_IRQ_WOC) {
1299 tmp = readl(iomap[SIL24_HOST_BAR] + HOST_CTRL);
1300 if (tmp & (HOST_CTRL_TRDY | HOST_CTRL_STOP | HOST_CTRL_DEVSEL))
1301 dev_printk(KERN_INFO, &pdev->dev,
1302 "Applying completion IRQ loss on PCI-X "
1303 "errata fix\n");
1304 else
1305 pi.flags &= ~SIL24_FLAG_PCIX_IRQ_WOC;
1306 }
1307
1308 /* allocate and fill host */
1309 host = ata_host_alloc_pinfo(&pdev->dev, ppi,
1310 SIL24_FLAG2NPORTS(ppi[0]->flags));
1311 if (!host)
1312 return -ENOMEM;
1313 host->iomap = iomap;
1314
1315 /* configure and activate the device */
1316 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
1317 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
1318 if (rc) {
1319 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
1320 if (rc) {
1321 dev_printk(KERN_ERR, &pdev->dev,
1322 "64-bit DMA enable failed\n");
1323 return rc;
1324 }
1325 }
1326 } else {
1327 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1328 if (rc) {
1329 dev_printk(KERN_ERR, &pdev->dev,
1330 "32-bit DMA enable failed\n");
1331 return rc;
1332 }
1333 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
1334 if (rc) {
1335 dev_printk(KERN_ERR, &pdev->dev,
1336 "32-bit consistent DMA enable failed\n");
1337 return rc;
1338 }
1339 }
1340
1341 /* Set max read request size to 4096. This slightly increases
1342 * write throughput for pci-e variants.
1343 */
1344 pcie_set_readrq(pdev, 4096);
1345
1346 sil24_init_controller(host);
1347
1348 if (sata_sil24_msi && !pci_enable_msi(pdev)) {
1349 dev_printk(KERN_INFO, &pdev->dev, "Using MSI\n");
1350 pci_intx(pdev, 0);
1351 }
1352
1353 pci_set_master(pdev);
1354 return ata_host_activate(host, pdev->irq, sil24_interrupt, IRQF_SHARED,
1355 &sil24_sht);
1356 }
1357
1358 #ifdef CONFIG_PM
1359 static int sil24_pci_device_resume(struct pci_dev *pdev)
1360 {
1361 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1362 void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
1363 int rc;
1364
1365 rc = ata_pci_device_do_resume(pdev);
1366 if (rc)
1367 return rc;
1368
1369 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND)
1370 writel(HOST_CTRL_GLOBAL_RST, host_base + HOST_CTRL);
1371
1372 sil24_init_controller(host);
1373
1374 ata_host_resume(host);
1375
1376 return 0;
1377 }
1378
1379 static int sil24_port_resume(struct ata_port *ap)
1380 {
1381 sil24_config_pmp(ap, ap->nr_pmp_links);
1382 return 0;
1383 }
1384 #endif
1385
1386 static int __init sil24_init(void)
1387 {
1388 return pci_register_driver(&sil24_pci_driver);
1389 }
1390
1391 static void __exit sil24_exit(void)
1392 {
1393 pci_unregister_driver(&sil24_pci_driver);
1394 }
1395
1396 MODULE_AUTHOR("Tejun Heo");
1397 MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver");
1398 MODULE_LICENSE("GPL");
1399 MODULE_DEVICE_TABLE(pci, sil24_pci_tbl);
1400
1401 module_init(sil24_init);
1402 module_exit(sil24_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree