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kbuild: Fix instrumentation removal breakage on avr32
[wrt350n-kernel.git] / drivers / ata / sata_sil24.c
blobb4b1f91ea693942f3292bcdbb885e11405c89376
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 * Port multiplier
56 */
57 struct sil24_port_multiplier {
58 __le32 diag;
59 __le32 sactive;
60 };
61
62 enum {
63 SIL24_HOST_BAR = 0,
64 SIL24_PORT_BAR = 2,
65
66 /* sil24 fetches in chunks of 64bytes. The first block
67 * contains the PRB and two SGEs. From the second block, it's
68 * consisted of four SGEs and called SGT. Calculate the
69 * number of SGTs that fit into one page.
70 */
71 SIL24_PRB_SZ = sizeof(struct sil24_prb)
72 + 2 * sizeof(struct sil24_sge),
73 SIL24_MAX_SGT = (PAGE_SIZE - SIL24_PRB_SZ)
74 / (4 * sizeof(struct sil24_sge)),
75
76 /* This will give us one unused SGEs for ATA. This extra SGE
77 * will be used to store CDB for ATAPI devices.
78 */
79 SIL24_MAX_SGE = 4 * SIL24_MAX_SGT + 1,
80
81 /*
82 * Global controller registers (128 bytes @ BAR0)
83 */
84 /* 32 bit regs */
85 HOST_SLOT_STAT = 0x00, /* 32 bit slot stat * 4 */
86 HOST_CTRL = 0x40,
87 HOST_IRQ_STAT = 0x44,
88 HOST_PHY_CFG = 0x48,
89 HOST_BIST_CTRL = 0x50,
90 HOST_BIST_PTRN = 0x54,
91 HOST_BIST_STAT = 0x58,
92 HOST_MEM_BIST_STAT = 0x5c,
93 HOST_FLASH_CMD = 0x70,
94 /* 8 bit regs */
95 HOST_FLASH_DATA = 0x74,
96 HOST_TRANSITION_DETECT = 0x75,
97 HOST_GPIO_CTRL = 0x76,
98 HOST_I2C_ADDR = 0x78, /* 32 bit */
99 HOST_I2C_DATA = 0x7c,
100 HOST_I2C_XFER_CNT = 0x7e,
101 HOST_I2C_CTRL = 0x7f,
102
103 /* HOST_SLOT_STAT bits */
104 HOST_SSTAT_ATTN = (1 << 31),
105
106 /* HOST_CTRL bits */
107 HOST_CTRL_M66EN = (1 << 16), /* M66EN PCI bus signal */
108 HOST_CTRL_TRDY = (1 << 17), /* latched PCI TRDY */
109 HOST_CTRL_STOP = (1 << 18), /* latched PCI STOP */
110 HOST_CTRL_DEVSEL = (1 << 19), /* latched PCI DEVSEL */
111 HOST_CTRL_REQ64 = (1 << 20), /* latched PCI REQ64 */
112 HOST_CTRL_GLOBAL_RST = (1 << 31), /* global reset */
113
114 /*
115 * Port registers
116 * (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2)
117 */
118 PORT_REGS_SIZE = 0x2000,
119
120 PORT_LRAM = 0x0000, /* 31 LRAM slots and PMP regs */
121 PORT_LRAM_SLOT_SZ = 0x0080, /* 32 bytes PRB + 2 SGE, ACT... */
122
123 PORT_PMP = 0x0f80, /* 8 bytes PMP * 16 (128 bytes) */
124 PORT_PMP_STATUS = 0x0000, /* port device status offset */
125 PORT_PMP_QACTIVE = 0x0004, /* port device QActive offset */
126 PORT_PMP_SIZE = 0x0008, /* 8 bytes per PMP */
127
128 /* 32 bit regs */
129 PORT_CTRL_STAT = 0x1000, /* write: ctrl-set, read: stat */
130 PORT_CTRL_CLR = 0x1004, /* write: ctrl-clear */
131 PORT_IRQ_STAT = 0x1008, /* high: status, low: interrupt */
132 PORT_IRQ_ENABLE_SET = 0x1010, /* write: enable-set */
133 PORT_IRQ_ENABLE_CLR = 0x1014, /* write: enable-clear */
134 PORT_ACTIVATE_UPPER_ADDR= 0x101c,
135 PORT_EXEC_FIFO = 0x1020, /* command execution fifo */
136 PORT_CMD_ERR = 0x1024, /* command error number */
137 PORT_FIS_CFG = 0x1028,
138 PORT_FIFO_THRES = 0x102c,
139 /* 16 bit regs */
140 PORT_DECODE_ERR_CNT = 0x1040,
141 PORT_DECODE_ERR_THRESH = 0x1042,
142 PORT_CRC_ERR_CNT = 0x1044,
143 PORT_CRC_ERR_THRESH = 0x1046,
144 PORT_HSHK_ERR_CNT = 0x1048,
145 PORT_HSHK_ERR_THRESH = 0x104a,
146 /* 32 bit regs */
147 PORT_PHY_CFG = 0x1050,
148 PORT_SLOT_STAT = 0x1800,
149 PORT_CMD_ACTIVATE = 0x1c00, /* 64 bit cmd activate * 31 (248 bytes) */
150 PORT_CONTEXT = 0x1e04,
151 PORT_EXEC_DIAG = 0x1e00, /* 32bit exec diag * 16 (64 bytes, 0-10 used on 3124) */
152 PORT_PSD_DIAG = 0x1e40, /* 32bit psd diag * 16 (64 bytes, 0-8 used on 3124) */
153 PORT_SCONTROL = 0x1f00,
154 PORT_SSTATUS = 0x1f04,
155 PORT_SERROR = 0x1f08,
156 PORT_SACTIVE = 0x1f0c,
157
158 /* PORT_CTRL_STAT bits */
159 PORT_CS_PORT_RST = (1 << 0), /* port reset */
160 PORT_CS_DEV_RST = (1 << 1), /* device reset */
161 PORT_CS_INIT = (1 << 2), /* port initialize */
162 PORT_CS_IRQ_WOC = (1 << 3), /* interrupt write one to clear */
163 PORT_CS_CDB16 = (1 << 5), /* 0=12b cdb, 1=16b cdb */
164 PORT_CS_PMP_RESUME = (1 << 6), /* PMP resume */
165 PORT_CS_32BIT_ACTV = (1 << 10), /* 32-bit activation */
166 PORT_CS_PMP_EN = (1 << 13), /* port multiplier enable */
167 PORT_CS_RDY = (1 << 31), /* port ready to accept commands */
168
169 /* PORT_IRQ_STAT/ENABLE_SET/CLR */
170 /* bits[11:0] are masked */
171 PORT_IRQ_COMPLETE = (1 << 0), /* command(s) completed */
172 PORT_IRQ_ERROR = (1 << 1), /* command execution error */
173 PORT_IRQ_PORTRDY_CHG = (1 << 2), /* port ready change */
174 PORT_IRQ_PWR_CHG = (1 << 3), /* power management change */
175 PORT_IRQ_PHYRDY_CHG = (1 << 4), /* PHY ready change */
176 PORT_IRQ_COMWAKE = (1 << 5), /* COMWAKE received */
177 PORT_IRQ_UNK_FIS = (1 << 6), /* unknown FIS received */
178 PORT_IRQ_DEV_XCHG = (1 << 7), /* device exchanged */
179 PORT_IRQ_8B10B = (1 << 8), /* 8b/10b decode error threshold */
180 PORT_IRQ_CRC = (1 << 9), /* CRC error threshold */
181 PORT_IRQ_HANDSHAKE = (1 << 10), /* handshake error threshold */
182 PORT_IRQ_SDB_NOTIFY = (1 << 11), /* SDB notify received */
183
184 DEF_PORT_IRQ = PORT_IRQ_COMPLETE | PORT_IRQ_ERROR |
185 PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG |
186 PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_NOTIFY,
187
188 /* bits[27:16] are unmasked (raw) */
189 PORT_IRQ_RAW_SHIFT = 16,
190 PORT_IRQ_MASKED_MASK = 0x7ff,
191 PORT_IRQ_RAW_MASK = (0x7ff << PORT_IRQ_RAW_SHIFT),
192
193 /* ENABLE_SET/CLR specific, intr steering - 2 bit field */
194 PORT_IRQ_STEER_SHIFT = 30,
195 PORT_IRQ_STEER_MASK = (3 << PORT_IRQ_STEER_SHIFT),
196
197 /* PORT_CMD_ERR constants */
198 PORT_CERR_DEV = 1, /* Error bit in D2H Register FIS */
199 PORT_CERR_SDB = 2, /* Error bit in SDB FIS */
200 PORT_CERR_DATA = 3, /* Error in data FIS not detected by dev */
201 PORT_CERR_SEND = 4, /* Initial cmd FIS transmission failure */
202 PORT_CERR_INCONSISTENT = 5, /* Protocol mismatch */
203 PORT_CERR_DIRECTION = 6, /* Data direction mismatch */
204 PORT_CERR_UNDERRUN = 7, /* Ran out of SGEs while writing */
205 PORT_CERR_OVERRUN = 8, /* Ran out of SGEs while reading */
206 PORT_CERR_PKT_PROT = 11, /* DIR invalid in 1st PIO setup of ATAPI */
207 PORT_CERR_SGT_BOUNDARY = 16, /* PLD ecode 00 - SGT not on qword boundary */
208 PORT_CERR_SGT_TGTABRT = 17, /* PLD ecode 01 - target abort */
209 PORT_CERR_SGT_MSTABRT = 18, /* PLD ecode 10 - master abort */
210 PORT_CERR_SGT_PCIPERR = 19, /* PLD ecode 11 - PCI parity err while fetching SGT */
211 PORT_CERR_CMD_BOUNDARY = 24, /* ctrl[15:13] 001 - PRB not on qword boundary */
212 PORT_CERR_CMD_TGTABRT = 25, /* ctrl[15:13] 010 - target abort */
213 PORT_CERR_CMD_MSTABRT = 26, /* ctrl[15:13] 100 - master abort */
214 PORT_CERR_CMD_PCIPERR = 27, /* ctrl[15:13] 110 - PCI parity err while fetching PRB */
215 PORT_CERR_XFR_UNDEF = 32, /* PSD ecode 00 - undefined */
216 PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */
217 PORT_CERR_XFR_MSTABRT = 34, /* PSD ecode 10 - master abort */
218 PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */
219 PORT_CERR_SENDSERVICE = 36, /* FIS received while sending service */
220
221 /* bits of PRB control field */
222 PRB_CTRL_PROTOCOL = (1 << 0), /* override def. ATA protocol */
223 PRB_CTRL_PACKET_READ = (1 << 4), /* PACKET cmd read */
224 PRB_CTRL_PACKET_WRITE = (1 << 5), /* PACKET cmd write */
225 PRB_CTRL_NIEN = (1 << 6), /* Mask completion irq */
226 PRB_CTRL_SRST = (1 << 7), /* Soft reset request (ign BSY?) */
227
228 /* PRB protocol field */
229 PRB_PROT_PACKET = (1 << 0),
230 PRB_PROT_TCQ = (1 << 1),
231 PRB_PROT_NCQ = (1 << 2),
232 PRB_PROT_READ = (1 << 3),
233 PRB_PROT_WRITE = (1 << 4),
234 PRB_PROT_TRANSPARENT = (1 << 5),
235
236 /*
237 * Other constants
238 */
239 SGE_TRM = (1 << 31), /* Last SGE in chain */
240 SGE_LNK = (1 << 30), /* linked list
241 Points to SGT, not SGE */
242 SGE_DRD = (1 << 29), /* discard data read (/dev/null)
243 data address ignored */
244
245 SIL24_MAX_CMDS = 31,
246
247 /* board id */
248 BID_SIL3124 = 0,
249 BID_SIL3132 = 1,
250 BID_SIL3131 = 2,
251
252 /* host flags */
253 SIL24_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
254 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
255 ATA_FLAG_NCQ | ATA_FLAG_ACPI_SATA |
256 ATA_FLAG_AN | ATA_FLAG_PMP,
257 SIL24_COMMON_LFLAGS = ATA_LFLAG_SKIP_D2H_BSY,
258 SIL24_FLAG_PCIX_IRQ_WOC = (1 << 24), /* IRQ loss errata on PCI-X */
259
260 IRQ_STAT_4PORTS = 0xf,
261 };
262
263 struct sil24_ata_block {
264 struct sil24_prb prb;
265 struct sil24_sge sge[SIL24_MAX_SGE];
266 };
267
268 struct sil24_atapi_block {
269 struct sil24_prb prb;
270 u8 cdb[16];
271 struct sil24_sge sge[SIL24_MAX_SGE];
272 };
273
274 union sil24_cmd_block {
275 struct sil24_ata_block ata;
276 struct sil24_atapi_block atapi;
277 };
278
279 static struct sil24_cerr_info {
280 unsigned int err_mask, action;
281 const char *desc;
282 } sil24_cerr_db[] = {
283 [0] = { AC_ERR_DEV, 0,
284 "device error" },
285 [PORT_CERR_DEV] = { AC_ERR_DEV, 0,
286 "device error via D2H FIS" },
287 [PORT_CERR_SDB] = { AC_ERR_DEV, 0,
288 "device error via SDB FIS" },
289 [PORT_CERR_DATA] = { AC_ERR_ATA_BUS, ATA_EH_SOFTRESET,
290 "error in data FIS" },
291 [PORT_CERR_SEND] = { AC_ERR_ATA_BUS, ATA_EH_SOFTRESET,
292 "failed to transmit command FIS" },
293 [PORT_CERR_INCONSISTENT] = { AC_ERR_HSM, ATA_EH_SOFTRESET,
294 "protocol mismatch" },
295 [PORT_CERR_DIRECTION] = { AC_ERR_HSM, ATA_EH_SOFTRESET,
296 "data directon mismatch" },
297 [PORT_CERR_UNDERRUN] = { AC_ERR_HSM, ATA_EH_SOFTRESET,
298 "ran out of SGEs while writing" },
299 [PORT_CERR_OVERRUN] = { AC_ERR_HSM, ATA_EH_SOFTRESET,
300 "ran out of SGEs while reading" },
301 [PORT_CERR_PKT_PROT] = { AC_ERR_HSM, ATA_EH_SOFTRESET,
302 "invalid data directon for ATAPI CDB" },
303 [PORT_CERR_SGT_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_SOFTRESET,
304 "SGT not on qword boundary" },
305 [PORT_CERR_SGT_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
306 "PCI target abort while fetching SGT" },
307 [PORT_CERR_SGT_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
308 "PCI master abort while fetching SGT" },
309 [PORT_CERR_SGT_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
310 "PCI parity error while fetching SGT" },
311 [PORT_CERR_CMD_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_SOFTRESET,
312 "PRB not on qword boundary" },
313 [PORT_CERR_CMD_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
314 "PCI target abort while fetching PRB" },
315 [PORT_CERR_CMD_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
316 "PCI master abort while fetching PRB" },
317 [PORT_CERR_CMD_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
318 "PCI parity error while fetching PRB" },
319 [PORT_CERR_XFR_UNDEF] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
320 "undefined error while transferring data" },
321 [PORT_CERR_XFR_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
322 "PCI target abort while transferring data" },
323 [PORT_CERR_XFR_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
324 "PCI master abort while transferring data" },
325 [PORT_CERR_XFR_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
326 "PCI parity error while transferring data" },
327 [PORT_CERR_SENDSERVICE] = { AC_ERR_HSM, ATA_EH_SOFTRESET,
328 "FIS received while sending service FIS" },
329 };
330
331 /*
332 * ap->private_data
333 *
334 * The preview driver always returned 0 for status. We emulate it
335 * here from the previous interrupt.
336 */
337 struct sil24_port_priv {
338 union sil24_cmd_block *cmd_block; /* 32 cmd blocks */
339 dma_addr_t cmd_block_dma; /* DMA base addr for them */
340 struct ata_taskfile tf; /* Cached taskfile registers */
341 int do_port_rst;
342 };
343
344 static void sil24_dev_config(struct ata_device *dev);
345 static u8 sil24_check_status(struct ata_port *ap);
346 static int sil24_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val);
347 static int sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val);
348 static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
349 static int sil24_qc_defer(struct ata_queued_cmd *qc);
350 static void sil24_qc_prep(struct ata_queued_cmd *qc);
351 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc);
352 static void sil24_irq_clear(struct ata_port *ap);
353 static void sil24_pmp_attach(struct ata_port *ap);
354 static void sil24_pmp_detach(struct ata_port *ap);
355 static void sil24_freeze(struct ata_port *ap);
356 static void sil24_thaw(struct ata_port *ap);
357 static void sil24_error_handler(struct ata_port *ap);
358 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc);
359 static int sil24_port_start(struct ata_port *ap);
360 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
361 #ifdef CONFIG_PM
362 static int sil24_pci_device_resume(struct pci_dev *pdev);
363 static int sil24_port_resume(struct ata_port *ap);
364 #endif
365
366 static const struct pci_device_id sil24_pci_tbl[] = {
367 { PCI_VDEVICE(CMD, 0x3124), BID_SIL3124 },
368 { PCI_VDEVICE(INTEL, 0x3124), BID_SIL3124 },
369 { PCI_VDEVICE(CMD, 0x3132), BID_SIL3132 },
370 { PCI_VDEVICE(CMD, 0x0242), BID_SIL3132 },
371 { PCI_VDEVICE(CMD, 0x3131), BID_SIL3131 },
372 { PCI_VDEVICE(CMD, 0x3531), BID_SIL3131 },
373
374 { } /* terminate list */
375 };
376
377 static struct pci_driver sil24_pci_driver = {
378 .name = DRV_NAME,
379 .id_table = sil24_pci_tbl,
380 .probe = sil24_init_one,
381 .remove = ata_pci_remove_one,
382 #ifdef CONFIG_PM
383 .suspend = ata_pci_device_suspend,
384 .resume = sil24_pci_device_resume,
385 #endif
386 };
387
388 static struct scsi_host_template sil24_sht = {
389 .module = THIS_MODULE,
390 .name = DRV_NAME,
391 .ioctl = ata_scsi_ioctl,
392 .queuecommand = ata_scsi_queuecmd,
393 .change_queue_depth = ata_scsi_change_queue_depth,
394 .can_queue = SIL24_MAX_CMDS,
395 .this_id = ATA_SHT_THIS_ID,
396 .sg_tablesize = SIL24_MAX_SGE,
397 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
398 .emulated = ATA_SHT_EMULATED,
399 .use_clustering = ATA_SHT_USE_CLUSTERING,
400 .proc_name = DRV_NAME,
401 .dma_boundary = ATA_DMA_BOUNDARY,
402 .slave_configure = ata_scsi_slave_config,
403 .slave_destroy = ata_scsi_slave_destroy,
404 .bios_param = ata_std_bios_param,
405 };
406
407 static const struct ata_port_operations sil24_ops = {
408 .dev_config = sil24_dev_config,
409
410 .check_status = sil24_check_status,
411 .check_altstatus = sil24_check_status,
412 .dev_select = ata_noop_dev_select,
413
414 .tf_read = sil24_tf_read,
415
416 .qc_defer = sil24_qc_defer,
417 .qc_prep = sil24_qc_prep,
418 .qc_issue = sil24_qc_issue,
419
420 .irq_clear = sil24_irq_clear,
421
422 .scr_read = sil24_scr_read,
423 .scr_write = sil24_scr_write,
424
425 .pmp_attach = sil24_pmp_attach,
426 .pmp_detach = sil24_pmp_detach,
427
428 .freeze = sil24_freeze,
429 .thaw = sil24_thaw,
430 .error_handler = sil24_error_handler,
431 .post_internal_cmd = sil24_post_internal_cmd,
432
433 .port_start = sil24_port_start,
434
435 #ifdef CONFIG_PM
436 .port_resume = sil24_port_resume,
437 #endif
438 };
439
440 /*
441 * Use bits 30-31 of port_flags to encode available port numbers.
442 * Current maxium is 4.
443 */
444 #define SIL24_NPORTS2FLAG(nports) ((((unsigned)(nports) - 1) & 0x3) << 30)
445 #define SIL24_FLAG2NPORTS(flag) ((((flag) >> 30) & 0x3) + 1)
446
447 static const struct ata_port_info sil24_port_info[] = {
448 /* sil_3124 */
449 {
450 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(4) |
451 SIL24_FLAG_PCIX_IRQ_WOC,
452 .link_flags = SIL24_COMMON_LFLAGS,
453 .pio_mask = 0x1f, /* pio0-4 */
454 .mwdma_mask = 0x07, /* mwdma0-2 */
455 .udma_mask = ATA_UDMA5, /* udma0-5 */
456 .port_ops = &sil24_ops,
457 },
458 /* sil_3132 */
459 {
460 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2),
461 .link_flags = SIL24_COMMON_LFLAGS,
462 .pio_mask = 0x1f, /* pio0-4 */
463 .mwdma_mask = 0x07, /* mwdma0-2 */
464 .udma_mask = ATA_UDMA5, /* udma0-5 */
465 .port_ops = &sil24_ops,
466 },
467 /* sil_3131/sil_3531 */
468 {
469 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1),
470 .link_flags = SIL24_COMMON_LFLAGS,
471 .pio_mask = 0x1f, /* pio0-4 */
472 .mwdma_mask = 0x07, /* mwdma0-2 */
473 .udma_mask = ATA_UDMA5, /* udma0-5 */
474 .port_ops = &sil24_ops,
475 },
476 };
477
478 static int sil24_tag(int tag)
479 {
480 if (unlikely(ata_tag_internal(tag)))
481 return 0;
482 return tag;
483 }
484
485 static void sil24_dev_config(struct ata_device *dev)
486 {
487 void __iomem *port = dev->link->ap->ioaddr.cmd_addr;
488
489 if (dev->cdb_len == 16)
490 writel(PORT_CS_CDB16, port + PORT_CTRL_STAT);
491 else
492 writel(PORT_CS_CDB16, port + PORT_CTRL_CLR);
493 }
494
495 static void sil24_read_tf(struct ata_port *ap, int tag, struct ata_taskfile *tf)
496 {
497 void __iomem *port = ap->ioaddr.cmd_addr;
498 struct sil24_prb __iomem *prb;
499 u8 fis[6 * 4];
500
501 prb = port + PORT_LRAM + sil24_tag(tag) * PORT_LRAM_SLOT_SZ;
502 memcpy_fromio(fis, prb->fis, sizeof(fis));
503 ata_tf_from_fis(fis, tf);
504 }
505
506 static u8 sil24_check_status(struct ata_port *ap)
507 {
508 struct sil24_port_priv *pp = ap->private_data;
509 return pp->tf.command;
510 }
511
512 static int sil24_scr_map[] = {
513 [SCR_CONTROL] = 0,
514 [SCR_STATUS] = 1,
515 [SCR_ERROR] = 2,
516 [SCR_ACTIVE] = 3,
517 };
518
519 static int sil24_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val)
520 {
521 void __iomem *scr_addr = ap->ioaddr.scr_addr;
522
523 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
524 void __iomem *addr;
525 addr = scr_addr + sil24_scr_map[sc_reg] * 4;
526 *val = readl(scr_addr + sil24_scr_map[sc_reg] * 4);
527 return 0;
528 }
529 return -EINVAL;
530 }
531
532 static int sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
533 {
534 void __iomem *scr_addr = ap->ioaddr.scr_addr;
535
536 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
537 void __iomem *addr;
538 addr = scr_addr + sil24_scr_map[sc_reg] * 4;
539 writel(val, scr_addr + sil24_scr_map[sc_reg] * 4);
540 return 0;
541 }
542 return -EINVAL;
543 }
544
545 static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
546 {
547 struct sil24_port_priv *pp = ap->private_data;
548 *tf = pp->tf;
549 }
550
551 static void sil24_config_port(struct ata_port *ap)
552 {
553 void __iomem *port = ap->ioaddr.cmd_addr;
554
555 /* configure IRQ WoC */
556 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC)
557 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_STAT);
558 else
559 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR);
560
561 /* zero error counters. */
562 writel(0x8000, port + PORT_DECODE_ERR_THRESH);
563 writel(0x8000, port + PORT_CRC_ERR_THRESH);
564 writel(0x8000, port + PORT_HSHK_ERR_THRESH);
565 writel(0x0000, port + PORT_DECODE_ERR_CNT);
566 writel(0x0000, port + PORT_CRC_ERR_CNT);
567 writel(0x0000, port + PORT_HSHK_ERR_CNT);
568
569 /* always use 64bit activation */
570 writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_CLR);
571
572 /* clear port multiplier enable and resume bits */
573 writel(PORT_CS_PMP_EN | PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR);
574 }
575
576 static void sil24_config_pmp(struct ata_port *ap, int attached)
577 {
578 void __iomem *port = ap->ioaddr.cmd_addr;
579
580 if (attached)
581 writel(PORT_CS_PMP_EN, port + PORT_CTRL_STAT);
582 else
583 writel(PORT_CS_PMP_EN, port + PORT_CTRL_CLR);
584 }
585
586 static void sil24_clear_pmp(struct ata_port *ap)
587 {
588 void __iomem *port = ap->ioaddr.cmd_addr;
589 int i;
590
591 writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR);
592
593 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) {
594 void __iomem *pmp_base = port + PORT_PMP + i * PORT_PMP_SIZE;
595
596 writel(0, pmp_base + PORT_PMP_STATUS);
597 writel(0, pmp_base + PORT_PMP_QACTIVE);
598 }
599 }
600
601 static int sil24_init_port(struct ata_port *ap)
602 {
603 void __iomem *port = ap->ioaddr.cmd_addr;
604 struct sil24_port_priv *pp = ap->private_data;
605 u32 tmp;
606
607 /* clear PMP error status */
608 if (ap->nr_pmp_links)
609 sil24_clear_pmp(ap);
610
611 writel(PORT_CS_INIT, port + PORT_CTRL_STAT);
612 ata_wait_register(port + PORT_CTRL_STAT,
613 PORT_CS_INIT, PORT_CS_INIT, 10, 100);
614 tmp = ata_wait_register(port + PORT_CTRL_STAT,
615 PORT_CS_RDY, 0, 10, 100);
616
617 if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY) {
618 pp->do_port_rst = 1;
619 ap->link.eh_context.i.action |= ATA_EH_HARDRESET;
620 return -EIO;
621 }
622
623 return 0;
624 }
625
626 static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp,
627 const struct ata_taskfile *tf,
628 int is_cmd, u32 ctrl,
629 unsigned long timeout_msec)
630 {
631 void __iomem *port = ap->ioaddr.cmd_addr;
632 struct sil24_port_priv *pp = ap->private_data;
633 struct sil24_prb *prb = &pp->cmd_block[0].ata.prb;
634 dma_addr_t paddr = pp->cmd_block_dma;
635 u32 irq_enabled, irq_mask, irq_stat;
636 int rc;
637
638 prb->ctrl = cpu_to_le16(ctrl);
639 ata_tf_to_fis(tf, pmp, is_cmd, prb->fis);
640
641 /* temporarily plug completion and error interrupts */
642 irq_enabled = readl(port + PORT_IRQ_ENABLE_SET);
643 writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR, port + PORT_IRQ_ENABLE_CLR);
644
645 writel((u32)paddr, port + PORT_CMD_ACTIVATE);
646 writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4);
647
648 irq_mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT;
649 irq_stat = ata_wait_register(port + PORT_IRQ_STAT, irq_mask, 0x0,
650 10, timeout_msec);
651
652 writel(irq_mask, port + PORT_IRQ_STAT); /* clear IRQs */
653 irq_stat >>= PORT_IRQ_RAW_SHIFT;
654
655 if (irq_stat & PORT_IRQ_COMPLETE)
656 rc = 0;
657 else {
658 /* force port into known state */
659 sil24_init_port(ap);
660
661 if (irq_stat & PORT_IRQ_ERROR)
662 rc = -EIO;
663 else
664 rc = -EBUSY;
665 }
666
667 /* restore IRQ enabled */
668 writel(irq_enabled, port + PORT_IRQ_ENABLE_SET);
669
670 return rc;
671 }
672
673 static int sil24_do_softreset(struct ata_link *link, unsigned int *class,
674 int pmp, unsigned long deadline)
675 {
676 struct ata_port *ap = link->ap;
677 unsigned long timeout_msec = 0;
678 struct ata_taskfile tf;
679 const char *reason;
680 int rc;
681
682 DPRINTK("ENTER\n");
683
684 if (ata_link_offline(link)) {
685 DPRINTK("PHY reports no device\n");
686 *class = ATA_DEV_NONE;
687 goto out;
688 }
689
690 /* put the port into known state */
691 if (sil24_init_port(ap)) {
692 reason = "port not ready";
693 goto err;
694 }
695
696 /* do SRST */
697 if (time_after(deadline, jiffies))
698 timeout_msec = jiffies_to_msecs(deadline - jiffies);
699
700 ata_tf_init(link->device, &tf); /* doesn't really matter */
701 rc = sil24_exec_polled_cmd(ap, pmp, &tf, 0, PRB_CTRL_SRST,
702 timeout_msec);
703 if (rc == -EBUSY) {
704 reason = "timeout";
705 goto err;
706 } else if (rc) {
707 reason = "SRST command error";
708 goto err;
709 }
710
711 sil24_read_tf(ap, 0, &tf);
712 *class = ata_dev_classify(&tf);
713
714 if (*class == ATA_DEV_UNKNOWN)
715 *class = ATA_DEV_NONE;
716
717 out:
718 DPRINTK("EXIT, class=%u\n", *class);
719 return 0;
720
721 err:
722 ata_link_printk(link, KERN_ERR, "softreset failed (%s)\n", reason);
723 return -EIO;
724 }
725
726 static int sil24_softreset(struct ata_link *link, unsigned int *class,
727 unsigned long deadline)
728 {
729 return sil24_do_softreset(link, class, SATA_PMP_CTRL_PORT, deadline);
730 }
731
732 static int sil24_hardreset(struct ata_link *link, unsigned int *class,
733 unsigned long deadline)
734 {
735 struct ata_port *ap = link->ap;
736 void __iomem *port = ap->ioaddr.cmd_addr;
737 struct sil24_port_priv *pp = ap->private_data;
738 int did_port_rst = 0;
739 const char *reason;
740 int tout_msec, rc;
741 u32 tmp;
742
743 retry:
744 /* Sometimes, DEV_RST is not enough to recover the controller.
745 * This happens often after PM DMA CS errata.
746 */
747 if (pp->do_port_rst) {
748 ata_port_printk(ap, KERN_WARNING, "controller in dubious "
749 "state, performing PORT_RST\n");
750
751 writel(PORT_CS_PORT_RST, port + PORT_CTRL_STAT);
752 msleep(10);
753 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
754 ata_wait_register(port + PORT_CTRL_STAT, PORT_CS_RDY, 0,
755 10, 5000);
756
757 /* restore port configuration */
758 sil24_config_port(ap);
759 sil24_config_pmp(ap, ap->nr_pmp_links);
760
761 pp->do_port_rst = 0;
762 did_port_rst = 1;
763 }
764
765 /* sil24 does the right thing(tm) without any protection */
766 sata_set_spd(link);
767
768 tout_msec = 100;
769 if (ata_link_online(link))
770 tout_msec = 5000;
771
772 writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT);
773 tmp = ata_wait_register(port + PORT_CTRL_STAT,
774 PORT_CS_DEV_RST, PORT_CS_DEV_RST, 10,
775 tout_msec);
776
777 /* SStatus oscillates between zero and valid status after
778 * DEV_RST, debounce it.
779 */
780 rc = sata_link_debounce(link, sata_deb_timing_long, deadline);
781 if (rc) {
782 reason = "PHY debouncing failed";
783 goto err;
784 }
785
786 if (tmp & PORT_CS_DEV_RST) {
787 if (ata_link_offline(link))
788 return 0;
789 reason = "link not ready";
790 goto err;
791 }
792
793 /* Sil24 doesn't store signature FIS after hardreset, so we
794 * can't wait for BSY to clear. Some devices take a long time
795 * to get ready and those devices will choke if we don't wait
796 * for BSY clearance here. Tell libata to perform follow-up
797 * softreset.
798 */
799 return -EAGAIN;
800
801 err:
802 if (!did_port_rst) {
803 pp->do_port_rst = 1;
804 goto retry;
805 }
806
807 ata_link_printk(link, KERN_ERR, "hardreset failed (%s)\n", reason);
808 return -EIO;
809 }
810
811 static inline void sil24_fill_sg(struct ata_queued_cmd *qc,
812 struct sil24_sge *sge)
813 {
814 struct scatterlist *sg;
815 struct sil24_sge *last_sge = NULL;
816 unsigned int si;
817
818 for_each_sg(qc->sg, sg, qc->n_elem, si) {
819 sge->addr = cpu_to_le64(sg_dma_address(sg));
820 sge->cnt = cpu_to_le32(sg_dma_len(sg));
821 sge->flags = 0;
822
823 last_sge = sge;
824 sge++;
825 }
826
827 last_sge->flags = cpu_to_le32(SGE_TRM);
828 }
829
830 static int sil24_qc_defer(struct ata_queued_cmd *qc)
831 {
832 struct ata_link *link = qc->dev->link;
833 struct ata_port *ap = link->ap;
834 u8 prot = qc->tf.protocol;
835
836 /*
837 * There is a bug in the chip:
838 * Port LRAM Causes the PRB/SGT Data to be Corrupted
839 * If the host issues a read request for LRAM and SActive registers
840 * while active commands are available in the port, PRB/SGT data in
841 * the LRAM can become corrupted. This issue applies only when
842 * reading from, but not writing to, the LRAM.
843 *
844 * Therefore, reading LRAM when there is no particular error [and
845 * other commands may be outstanding] is prohibited.
846 *
847 * To avoid this bug there are two situations where a command must run
848 * exclusive of any other commands on the port:
849 *
850 * - ATAPI commands which check the sense data
851 * - Passthrough ATA commands which always have ATA_QCFLAG_RESULT_TF
852 * set.
853 *
854 */
855 int is_excl = (ata_is_atapi(prot) ||
856 (qc->flags & ATA_QCFLAG_RESULT_TF));
857
858 if (unlikely(ap->excl_link)) {
859 if (link == ap->excl_link) {
860 if (ap->nr_active_links)
861 return ATA_DEFER_PORT;
862 qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
863 } else
864 return ATA_DEFER_PORT;
865 } else if (unlikely(is_excl)) {
866 ap->excl_link = link;
867 if (ap->nr_active_links)
868 return ATA_DEFER_PORT;
869 qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
870 }
871
872 return ata_std_qc_defer(qc);
873 }
874
875 static void sil24_qc_prep(struct ata_queued_cmd *qc)
876 {
877 struct ata_port *ap = qc->ap;
878 struct sil24_port_priv *pp = ap->private_data;
879 union sil24_cmd_block *cb;
880 struct sil24_prb *prb;
881 struct sil24_sge *sge;
882 u16 ctrl = 0;
883
884 cb = &pp->cmd_block[sil24_tag(qc->tag)];
885
886 if (!ata_is_atapi(qc->tf.protocol)) {
887 prb = &cb->ata.prb;
888 sge = cb->ata.sge;
889 } else {
890 prb = &cb->atapi.prb;
891 sge = cb->atapi.sge;
892 memset(cb->atapi.cdb, 0, 32);
893 memcpy(cb->atapi.cdb, qc->cdb, qc->dev->cdb_len);
894
895 if (ata_is_data(qc->tf.protocol)) {
896 if (qc->tf.flags & ATA_TFLAG_WRITE)
897 ctrl = PRB_CTRL_PACKET_WRITE;
898 else
899 ctrl = PRB_CTRL_PACKET_READ;
900 }
901 }
902
903 prb->ctrl = cpu_to_le16(ctrl);
904 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, prb->fis);
905
906 if (qc->flags & ATA_QCFLAG_DMAMAP)
907 sil24_fill_sg(qc, sge);
908 }
909
910 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc)
911 {
912 struct ata_port *ap = qc->ap;
913 struct sil24_port_priv *pp = ap->private_data;
914 void __iomem *port = ap->ioaddr.cmd_addr;
915 unsigned int tag = sil24_tag(qc->tag);
916 dma_addr_t paddr;
917 void __iomem *activate;
918
919 paddr = pp->cmd_block_dma + tag * sizeof(*pp->cmd_block);
920 activate = port + PORT_CMD_ACTIVATE + tag * 8;
921
922 writel((u32)paddr, activate);
923 writel((u64)paddr >> 32, activate + 4);
924
925 return 0;
926 }
927
928 static void sil24_irq_clear(struct ata_port *ap)
929 {
930 /* unused */
931 }
932
933 static void sil24_pmp_attach(struct ata_port *ap)
934 {
935 sil24_config_pmp(ap, 1);
936 sil24_init_port(ap);
937 }
938
939 static void sil24_pmp_detach(struct ata_port *ap)
940 {
941 sil24_init_port(ap);
942 sil24_config_pmp(ap, 0);
943 }
944
945 static int sil24_pmp_softreset(struct ata_link *link, unsigned int *class,
946 unsigned long deadline)
947 {
948 return sil24_do_softreset(link, class, link->pmp, deadline);
949 }
950
951 static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class,
952 unsigned long deadline)
953 {
954 int rc;
955
956 rc = sil24_init_port(link->ap);
957 if (rc) {
958 ata_link_printk(link, KERN_ERR,
959 "hardreset failed (port not ready)\n");
960 return rc;
961 }
962
963 return sata_pmp_std_hardreset(link, class, deadline);
964 }
965
966 static void sil24_freeze(struct ata_port *ap)
967 {
968 void __iomem *port = ap->ioaddr.cmd_addr;
969
970 /* Port-wide IRQ mask in HOST_CTRL doesn't really work, clear
971 * PORT_IRQ_ENABLE instead.
972 */
973 writel(0xffff, port + PORT_IRQ_ENABLE_CLR);
974 }
975
976 static void sil24_thaw(struct ata_port *ap)
977 {
978 void __iomem *port = ap->ioaddr.cmd_addr;
979 u32 tmp;
980
981 /* clear IRQ */
982 tmp = readl(port + PORT_IRQ_STAT);
983 writel(tmp, port + PORT_IRQ_STAT);
984
985 /* turn IRQ back on */
986 writel(DEF_PORT_IRQ, port + PORT_IRQ_ENABLE_SET);
987 }
988
989 static void sil24_error_intr(struct ata_port *ap)
990 {
991 void __iomem *port = ap->ioaddr.cmd_addr;
992 struct sil24_port_priv *pp = ap->private_data;
993 struct ata_queued_cmd *qc = NULL;
994 struct ata_link *link;
995 struct ata_eh_info *ehi;
996 int abort = 0, freeze = 0;
997 u32 irq_stat;
998
999 /* on error, we need to clear IRQ explicitly */
1000 irq_stat = readl(port + PORT_IRQ_STAT);
1001 writel(irq_stat, port + PORT_IRQ_STAT);
1002
1003 /* first, analyze and record host port events */
1004 link = &ap->link;
1005 ehi = &link->eh_info;
1006 ata_ehi_clear_desc(ehi);
1007
1008 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
1009
1010 if (irq_stat & PORT_IRQ_SDB_NOTIFY) {
1011 ata_ehi_push_desc(ehi, "SDB notify");
1012 sata_async_notification(ap);
1013 }
1014
1015 if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) {
1016 ata_ehi_hotplugged(ehi);
1017 ata_ehi_push_desc(ehi, "%s",
1018 irq_stat & PORT_IRQ_PHYRDY_CHG ?
1019 "PHY RDY changed" : "device exchanged");
1020 freeze = 1;
1021 }
1022
1023 if (irq_stat & PORT_IRQ_UNK_FIS) {
1024 ehi->err_mask |= AC_ERR_HSM;
1025 ehi->action |= ATA_EH_SOFTRESET;
1026 ata_ehi_push_desc(ehi, "unknown FIS");
1027 freeze = 1;
1028 }
1029
1030 /* deal with command error */
1031 if (irq_stat & PORT_IRQ_ERROR) {
1032 struct sil24_cerr_info *ci = NULL;
1033 unsigned int err_mask = 0, action = 0;
1034 u32 context, cerr;
1035 int pmp;
1036
1037 abort = 1;
1038
1039 /* DMA Context Switch Failure in Port Multiplier Mode
1040 * errata. If we have active commands to 3 or more
1041 * devices, any error condition on active devices can
1042 * corrupt DMA context switching.
1043 */
1044 if (ap->nr_active_links >= 3) {
1045 ehi->err_mask |= AC_ERR_OTHER;
1046 ehi->action |= ATA_EH_HARDRESET;
1047 ata_ehi_push_desc(ehi, "PMP DMA CS errata");
1048 pp->do_port_rst = 1;
1049 freeze = 1;
1050 }
1051
1052 /* find out the offending link and qc */
1053 if (ap->nr_pmp_links) {
1054 context = readl(port + PORT_CONTEXT);
1055 pmp = (context >> 5) & 0xf;
1056
1057 if (pmp < ap->nr_pmp_links) {
1058 link = &ap->pmp_link[pmp];
1059 ehi = &link->eh_info;
1060 qc = ata_qc_from_tag(ap, link->active_tag);
1061
1062 ata_ehi_clear_desc(ehi);
1063 ata_ehi_push_desc(ehi, "irq_stat 0x%08x",
1064 irq_stat);
1065 } else {
1066 err_mask |= AC_ERR_HSM;
1067 action |= ATA_EH_HARDRESET;
1068 freeze = 1;
1069 }
1070 } else
1071 qc = ata_qc_from_tag(ap, link->active_tag);
1072
1073 /* analyze CMD_ERR */
1074 cerr = readl(port + PORT_CMD_ERR);
1075 if (cerr < ARRAY_SIZE(sil24_cerr_db))
1076 ci = &sil24_cerr_db[cerr];
1077
1078 if (ci && ci->desc) {
1079 err_mask |= ci->err_mask;
1080 action |= ci->action;
1081 if (action & ATA_EH_RESET_MASK)
1082 freeze = 1;
1083 ata_ehi_push_desc(ehi, "%s", ci->desc);
1084 } else {
1085 err_mask |= AC_ERR_OTHER;
1086 action |= ATA_EH_SOFTRESET;
1087 freeze = 1;
1088 ata_ehi_push_desc(ehi, "unknown command error %d",
1089 cerr);
1090 }
1091
1092 /* record error info */
1093 if (qc) {
1094 sil24_read_tf(ap, qc->tag, &pp->tf);
1095 qc->err_mask |= err_mask;
1096 } else
1097 ehi->err_mask |= err_mask;
1098
1099 ehi->action |= action;
1100
1101 /* if PMP, resume */
1102 if (ap->nr_pmp_links)
1103 writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_STAT);
1104 }
1105
1106 /* freeze or abort */
1107 if (freeze)
1108 ata_port_freeze(ap);
1109 else if (abort) {
1110 if (qc)
1111 ata_link_abort(qc->dev->link);
1112 else
1113 ata_port_abort(ap);
1114 }
1115 }
1116
1117 static void sil24_finish_qc(struct ata_queued_cmd *qc)
1118 {
1119 struct ata_port *ap = qc->ap;
1120 struct sil24_port_priv *pp = ap->private_data;
1121
1122 if (qc->flags & ATA_QCFLAG_RESULT_TF)
1123 sil24_read_tf(ap, qc->tag, &pp->tf);
1124 }
1125
1126 static inline void sil24_host_intr(struct ata_port *ap)
1127 {
1128 void __iomem *port = ap->ioaddr.cmd_addr;
1129 u32 slot_stat, qc_active;
1130 int rc;
1131
1132 /* If PCIX_IRQ_WOC, there's an inherent race window between
1133 * clearing IRQ pending status and reading PORT_SLOT_STAT
1134 * which may cause spurious interrupts afterwards. This is
1135 * unavoidable and much better than losing interrupts which
1136 * happens if IRQ pending is cleared after reading
1137 * PORT_SLOT_STAT.
1138 */
1139 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC)
1140 writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT);
1141
1142 slot_stat = readl(port + PORT_SLOT_STAT);
1143
1144 if (unlikely(slot_stat & HOST_SSTAT_ATTN)) {
1145 sil24_error_intr(ap);
1146 return;
1147 }
1148
1149 qc_active = slot_stat & ~HOST_SSTAT_ATTN;
1150 rc = ata_qc_complete_multiple(ap, qc_active, sil24_finish_qc);
1151 if (rc > 0)
1152 return;
1153 if (rc < 0) {
1154 struct ata_eh_info *ehi = &ap->link.eh_info;
1155 ehi->err_mask |= AC_ERR_HSM;
1156 ehi->action |= ATA_EH_SOFTRESET;
1157 ata_port_freeze(ap);
1158 return;
1159 }
1160
1161 /* spurious interrupts are expected if PCIX_IRQ_WOC */
1162 if (!(ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) && ata_ratelimit())
1163 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
1164 "(slot_stat 0x%x active_tag %d sactive 0x%x)\n",
1165 slot_stat, ap->link.active_tag, ap->link.sactive);
1166 }
1167
1168 static irqreturn_t sil24_interrupt(int irq, void *dev_instance)
1169 {
1170 struct ata_host *host = dev_instance;
1171 void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
1172 unsigned handled = 0;
1173 u32 status;
1174 int i;
1175
1176 status = readl(host_base + HOST_IRQ_STAT);
1177
1178 if (status == 0xffffffff) {
1179 printk(KERN_ERR DRV_NAME ": IRQ status == 0xffffffff, "
1180 "PCI fault or device removal?\n");
1181 goto out;
1182 }
1183
1184 if (!(status & IRQ_STAT_4PORTS))
1185 goto out;
1186
1187 spin_lock(&host->lock);
1188
1189 for (i = 0; i < host->n_ports; i++)
1190 if (status & (1 << i)) {
1191 struct ata_port *ap = host->ports[i];
1192 if (ap && !(ap->flags & ATA_FLAG_DISABLED)) {
1193 sil24_host_intr(ap);
1194 handled++;
1195 } else
1196 printk(KERN_ERR DRV_NAME
1197 ": interrupt from disabled port %d\n", i);
1198 }
1199
1200 spin_unlock(&host->lock);
1201 out:
1202 return IRQ_RETVAL(handled);
1203 }
1204
1205 static void sil24_error_handler(struct ata_port *ap)
1206 {
1207 struct sil24_port_priv *pp = ap->private_data;
1208
1209 if (sil24_init_port(ap))
1210 ata_eh_freeze_port(ap);
1211
1212 /* perform recovery */
1213 sata_pmp_do_eh(ap, ata_std_prereset, sil24_softreset, sil24_hardreset,
1214 ata_std_postreset, sata_pmp_std_prereset,
1215 sil24_pmp_softreset, sil24_pmp_hardreset,
1216 sata_pmp_std_postreset);
1217
1218 pp->do_port_rst = 0;
1219 }
1220
1221 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc)
1222 {
1223 struct ata_port *ap = qc->ap;
1224
1225 /* make DMA engine forget about the failed command */
1226 if ((qc->flags & ATA_QCFLAG_FAILED) && sil24_init_port(ap))
1227 ata_eh_freeze_port(ap);
1228 }
1229
1230 static int sil24_port_start(struct ata_port *ap)
1231 {
1232 struct device *dev = ap->host->dev;
1233 struct sil24_port_priv *pp;
1234 union sil24_cmd_block *cb;
1235 size_t cb_size = sizeof(*cb) * SIL24_MAX_CMDS;
1236 dma_addr_t cb_dma;
1237 int rc;
1238
1239 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1240 if (!pp)
1241 return -ENOMEM;
1242
1243 pp->tf.command = ATA_DRDY;
1244
1245 cb = dmam_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL);
1246 if (!cb)
1247 return -ENOMEM;
1248 memset(cb, 0, cb_size);
1249
1250 rc = ata_pad_alloc(ap, dev);
1251 if (rc)
1252 return rc;
1253
1254 pp->cmd_block = cb;
1255 pp->cmd_block_dma = cb_dma;
1256
1257 ap->private_data = pp;
1258
1259 return 0;
1260 }
1261
1262 static void sil24_init_controller(struct ata_host *host)
1263 {
1264 void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
1265 u32 tmp;
1266 int i;
1267
1268 /* GPIO off */
1269 writel(0, host_base + HOST_FLASH_CMD);
1270
1271 /* clear global reset & mask interrupts during initialization */
1272 writel(0, host_base + HOST_CTRL);
1273
1274 /* init ports */
1275 for (i = 0; i < host->n_ports; i++) {
1276 struct ata_port *ap = host->ports[i];
1277 void __iomem *port = ap->ioaddr.cmd_addr;
1278
1279 /* Initial PHY setting */
1280 writel(0x20c, port + PORT_PHY_CFG);
1281
1282 /* Clear port RST */
1283 tmp = readl(port + PORT_CTRL_STAT);
1284 if (tmp & PORT_CS_PORT_RST) {
1285 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
1286 tmp = ata_wait_register(port + PORT_CTRL_STAT,
1287 PORT_CS_PORT_RST,
1288 PORT_CS_PORT_RST, 10, 100);
1289 if (tmp & PORT_CS_PORT_RST)
1290 dev_printk(KERN_ERR, host->dev,
1291 "failed to clear port RST\n");
1292 }
1293
1294 /* configure port */
1295 sil24_config_port(ap);
1296 }
1297
1298 /* Turn on interrupts */
1299 writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL);
1300 }
1301
1302 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1303 {
1304 extern int __MARKER__sil24_cmd_block_is_sized_wrongly;
1305 static int printed_version;
1306 struct ata_port_info pi = sil24_port_info[ent->driver_data];
1307 const struct ata_port_info *ppi[] = { &pi, NULL };
1308 void __iomem * const *iomap;
1309 struct ata_host *host;
1310 int i, rc;
1311 u32 tmp;
1312
1313 /* cause link error if sil24_cmd_block is sized wrongly */
1314 if (sizeof(union sil24_cmd_block) != PAGE_SIZE)
1315 __MARKER__sil24_cmd_block_is_sized_wrongly = 1;
1316
1317 if (!printed_version++)
1318 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1319
1320 /* acquire resources */
1321 rc = pcim_enable_device(pdev);
1322 if (rc)
1323 return rc;
1324
1325 rc = pcim_iomap_regions(pdev,
1326 (1 << SIL24_HOST_BAR) | (1 << SIL24_PORT_BAR),
1327 DRV_NAME);
1328 if (rc)
1329 return rc;
1330 iomap = pcim_iomap_table(pdev);
1331
1332 /* apply workaround for completion IRQ loss on PCI-X errata */
1333 if (pi.flags & SIL24_FLAG_PCIX_IRQ_WOC) {
1334 tmp = readl(iomap[SIL24_HOST_BAR] + HOST_CTRL);
1335 if (tmp & (HOST_CTRL_TRDY | HOST_CTRL_STOP | HOST_CTRL_DEVSEL))
1336 dev_printk(KERN_INFO, &pdev->dev,
1337 "Applying completion IRQ loss on PCI-X "
1338 "errata fix\n");
1339 else
1340 pi.flags &= ~SIL24_FLAG_PCIX_IRQ_WOC;
1341 }
1342
1343 /* allocate and fill host */
1344 host = ata_host_alloc_pinfo(&pdev->dev, ppi,
1345 SIL24_FLAG2NPORTS(ppi[0]->flags));
1346 if (!host)
1347 return -ENOMEM;
1348 host->iomap = iomap;
1349
1350 for (i = 0; i < host->n_ports; i++) {
1351 struct ata_port *ap = host->ports[i];
1352 size_t offset = ap->port_no * PORT_REGS_SIZE;
1353 void __iomem *port = iomap[SIL24_PORT_BAR] + offset;
1354
1355 host->ports[i]->ioaddr.cmd_addr = port;
1356 host->ports[i]->ioaddr.scr_addr = port + PORT_SCONTROL;
1357
1358 ata_port_pbar_desc(ap, SIL24_HOST_BAR, -1, "host");
1359 ata_port_pbar_desc(ap, SIL24_PORT_BAR, offset, "port");
1360 }
1361
1362 /* configure and activate the device */
1363 if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1364 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1365 if (rc) {
1366 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1367 if (rc) {
1368 dev_printk(KERN_ERR, &pdev->dev,
1369 "64-bit DMA enable failed\n");
1370 return rc;
1371 }
1372 }
1373 } else {
1374 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1375 if (rc) {
1376 dev_printk(KERN_ERR, &pdev->dev,
1377 "32-bit DMA enable failed\n");
1378 return rc;
1379 }
1380 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1381 if (rc) {
1382 dev_printk(KERN_ERR, &pdev->dev,
1383 "32-bit consistent DMA enable failed\n");
1384 return rc;
1385 }
1386 }
1387
1388 sil24_init_controller(host);
1389
1390 pci_set_master(pdev);
1391 return ata_host_activate(host, pdev->irq, sil24_interrupt, IRQF_SHARED,
1392 &sil24_sht);
1393 }
1394
1395 #ifdef CONFIG_PM
1396 static int sil24_pci_device_resume(struct pci_dev *pdev)
1397 {
1398 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1399 void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
1400 int rc;
1401
1402 rc = ata_pci_device_do_resume(pdev);
1403 if (rc)
1404 return rc;
1405
1406 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND)
1407 writel(HOST_CTRL_GLOBAL_RST, host_base + HOST_CTRL);
1408
1409 sil24_init_controller(host);
1410
1411 ata_host_resume(host);
1412
1413 return 0;
1414 }
1415
1416 static int sil24_port_resume(struct ata_port *ap)
1417 {
1418 sil24_config_pmp(ap, ap->nr_pmp_links);
1419 return 0;
1420 }
1421 #endif
1422
1423 static int __init sil24_init(void)
1424 {
1425 return pci_register_driver(&sil24_pci_driver);
1426 }
1427
1428 static void __exit sil24_exit(void)
1429 {
1430 pci_unregister_driver(&sil24_pci_driver);
1431 }
1432
1433 MODULE_AUTHOR("Tejun Heo");
1434 MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver");
1435 MODULE_LICENSE("GPL");
1436 MODULE_DEVICE_TABLE(pci, sil24_pci_tbl);
1437
1438 module_init(sil24_init);
1439 module_exit(sil24_exit);
WRT350N Kernel Patches