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1da177e4 LT |
1 | /* |
2 | * ahci.c - AHCI SATA support | |
3 | * | |
af36d7f0 JG |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2004-2005 Red Hat, Inc. | |
9 | * | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2, or (at your option) | |
14 | * any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; see the file COPYING. If not, write to | |
23 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | * | |
25 | * | |
26 | * libata documentation is available via 'make {ps|pdf}docs', | |
27 | * as Documentation/DocBook/libata.* | |
28 | * | |
29 | * AHCI hardware documentation: | |
1da177e4 | 30 | * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf |
af36d7f0 | 31 | * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf |
1da177e4 LT |
32 | * |
33 | */ | |
34 | ||
35 | #include <linux/kernel.h> | |
36 | #include <linux/module.h> | |
37 | #include <linux/pci.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/blkdev.h> | |
40 | #include <linux/delay.h> | |
41 | #include <linux/interrupt.h> | |
42 | #include <linux/sched.h> | |
87507cfd | 43 | #include <linux/dma-mapping.h> |
a9524a76 | 44 | #include <linux/device.h> |
1da177e4 | 45 | #include <scsi/scsi_host.h> |
193515d5 | 46 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
47 | #include <linux/libata.h> |
48 | #include <asm/io.h> | |
49 | ||
50 | #define DRV_NAME "ahci" | |
af64371a | 51 | #define DRV_VERSION "1.3" |
1da177e4 LT |
52 | |
53 | ||
54 | enum { | |
55 | AHCI_PCI_BAR = 5, | |
56 | AHCI_MAX_SG = 168, /* hardware max is 64K */ | |
57 | AHCI_DMA_BOUNDARY = 0xffffffff, | |
58 | AHCI_USE_CLUSTERING = 0, | |
59 | AHCI_CMD_SLOT_SZ = 32 * 32, | |
60 | AHCI_RX_FIS_SZ = 256, | |
61 | AHCI_CMD_TBL_HDR = 0x80, | |
a0ea7328 | 62 | AHCI_CMD_TBL_CDB = 0x40, |
1da177e4 LT |
63 | AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR + (AHCI_MAX_SG * 16), |
64 | AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ + | |
65 | AHCI_RX_FIS_SZ, | |
66 | AHCI_IRQ_ON_SG = (1 << 31), | |
67 | AHCI_CMD_ATAPI = (1 << 5), | |
68 | AHCI_CMD_WRITE = (1 << 6), | |
4b10e559 | 69 | AHCI_CMD_PREFETCH = (1 << 7), |
22b49985 TH |
70 | AHCI_CMD_RESET = (1 << 8), |
71 | AHCI_CMD_CLR_BUSY = (1 << 10), | |
1da177e4 LT |
72 | |
73 | RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */ | |
74 | ||
75 | board_ahci = 0, | |
76 | ||
77 | /* global controller registers */ | |
78 | HOST_CAP = 0x00, /* host capabilities */ | |
79 | HOST_CTL = 0x04, /* global host control */ | |
80 | HOST_IRQ_STAT = 0x08, /* interrupt status */ | |
81 | HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */ | |
82 | HOST_VERSION = 0x10, /* AHCI spec. version compliancy */ | |
83 | ||
84 | /* HOST_CTL bits */ | |
85 | HOST_RESET = (1 << 0), /* reset controller; self-clear */ | |
86 | HOST_IRQ_EN = (1 << 1), /* global IRQ enable */ | |
87 | HOST_AHCI_EN = (1 << 31), /* AHCI enabled */ | |
88 | ||
89 | /* HOST_CAP bits */ | |
90 | HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */ | |
22b49985 | 91 | HOST_CAP_CLO = (1 << 24), /* Command List Override support */ |
1da177e4 LT |
92 | |
93 | /* registers for each SATA port */ | |
94 | PORT_LST_ADDR = 0x00, /* command list DMA addr */ | |
95 | PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */ | |
96 | PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */ | |
97 | PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */ | |
98 | PORT_IRQ_STAT = 0x10, /* interrupt status */ | |
99 | PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */ | |
100 | PORT_CMD = 0x18, /* port command */ | |
101 | PORT_TFDATA = 0x20, /* taskfile data */ | |
102 | PORT_SIG = 0x24, /* device TF signature */ | |
103 | PORT_CMD_ISSUE = 0x38, /* command issue */ | |
104 | PORT_SCR = 0x28, /* SATA phy register block */ | |
105 | PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */ | |
106 | PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */ | |
107 | PORT_SCR_ERR = 0x30, /* SATA phy register: SError */ | |
108 | PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */ | |
109 | ||
110 | /* PORT_IRQ_{STAT,MASK} bits */ | |
111 | PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */ | |
112 | PORT_IRQ_TF_ERR = (1 << 30), /* task file error */ | |
113 | PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */ | |
114 | PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */ | |
115 | PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */ | |
116 | PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */ | |
117 | PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */ | |
118 | PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */ | |
119 | ||
120 | PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */ | |
121 | PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */ | |
122 | PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */ | |
123 | PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */ | |
124 | PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */ | |
125 | PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */ | |
126 | PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */ | |
127 | PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */ | |
128 | PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */ | |
129 | ||
130 | PORT_IRQ_FATAL = PORT_IRQ_TF_ERR | | |
131 | PORT_IRQ_HBUS_ERR | | |
132 | PORT_IRQ_HBUS_DATA_ERR | | |
133 | PORT_IRQ_IF_ERR, | |
134 | DEF_PORT_IRQ = PORT_IRQ_FATAL | PORT_IRQ_PHYRDY | | |
135 | PORT_IRQ_CONNECT | PORT_IRQ_SG_DONE | | |
136 | PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_FIS | | |
137 | PORT_IRQ_DMAS_FIS | PORT_IRQ_PIOS_FIS | | |
138 | PORT_IRQ_D2H_REG_FIS, | |
139 | ||
140 | /* PORT_CMD bits */ | |
02eaa666 | 141 | PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */ |
1da177e4 LT |
142 | PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */ |
143 | PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */ | |
144 | PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */ | |
22b49985 | 145 | PORT_CMD_CLO = (1 << 3), /* Command list override */ |
1da177e4 LT |
146 | PORT_CMD_POWER_ON = (1 << 2), /* Power up device */ |
147 | PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */ | |
148 | PORT_CMD_START = (1 << 0), /* Enable port DMA engine */ | |
149 | ||
150 | PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */ | |
151 | PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */ | |
152 | PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */ | |
4b0060f4 JG |
153 | |
154 | /* hpriv->flags bits */ | |
155 | AHCI_FLAG_MSI = (1 << 0), | |
1da177e4 LT |
156 | }; |
157 | ||
158 | struct ahci_cmd_hdr { | |
159 | u32 opts; | |
160 | u32 status; | |
161 | u32 tbl_addr; | |
162 | u32 tbl_addr_hi; | |
163 | u32 reserved[4]; | |
164 | }; | |
165 | ||
166 | struct ahci_sg { | |
167 | u32 addr; | |
168 | u32 addr_hi; | |
169 | u32 reserved; | |
170 | u32 flags_size; | |
171 | }; | |
172 | ||
173 | struct ahci_host_priv { | |
174 | unsigned long flags; | |
175 | u32 cap; /* cache of HOST_CAP register */ | |
176 | u32 port_map; /* cache of HOST_PORTS_IMPL reg */ | |
177 | }; | |
178 | ||
179 | struct ahci_port_priv { | |
180 | struct ahci_cmd_hdr *cmd_slot; | |
181 | dma_addr_t cmd_slot_dma; | |
182 | void *cmd_tbl; | |
183 | dma_addr_t cmd_tbl_dma; | |
184 | struct ahci_sg *cmd_tbl_sg; | |
185 | void *rx_fis; | |
186 | dma_addr_t rx_fis_dma; | |
187 | }; | |
188 | ||
189 | static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg); | |
190 | static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val); | |
191 | static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent); | |
9a3d9eb0 | 192 | static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc); |
1da177e4 | 193 | static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs); |
4bd00f6a | 194 | static int ahci_probe_reset(struct ata_port *ap, unsigned int *classes); |
1da177e4 LT |
195 | static void ahci_irq_clear(struct ata_port *ap); |
196 | static void ahci_eng_timeout(struct ata_port *ap); | |
197 | static int ahci_port_start(struct ata_port *ap); | |
198 | static void ahci_port_stop(struct ata_port *ap); | |
1da177e4 LT |
199 | static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf); |
200 | static void ahci_qc_prep(struct ata_queued_cmd *qc); | |
201 | static u8 ahci_check_status(struct ata_port *ap); | |
1da177e4 | 202 | static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); |
907f4678 | 203 | static void ahci_remove_one (struct pci_dev *pdev); |
1da177e4 | 204 | |
193515d5 | 205 | static struct scsi_host_template ahci_sht = { |
1da177e4 LT |
206 | .module = THIS_MODULE, |
207 | .name = DRV_NAME, | |
208 | .ioctl = ata_scsi_ioctl, | |
209 | .queuecommand = ata_scsi_queuecmd, | |
1da177e4 LT |
210 | .can_queue = ATA_DEF_QUEUE, |
211 | .this_id = ATA_SHT_THIS_ID, | |
212 | .sg_tablesize = AHCI_MAX_SG, | |
1da177e4 LT |
213 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, |
214 | .emulated = ATA_SHT_EMULATED, | |
215 | .use_clustering = AHCI_USE_CLUSTERING, | |
216 | .proc_name = DRV_NAME, | |
217 | .dma_boundary = AHCI_DMA_BOUNDARY, | |
218 | .slave_configure = ata_scsi_slave_config, | |
219 | .bios_param = ata_std_bios_param, | |
1da177e4 LT |
220 | }; |
221 | ||
057ace5e | 222 | static const struct ata_port_operations ahci_ops = { |
1da177e4 LT |
223 | .port_disable = ata_port_disable, |
224 | ||
225 | .check_status = ahci_check_status, | |
226 | .check_altstatus = ahci_check_status, | |
1da177e4 LT |
227 | .dev_select = ata_noop_dev_select, |
228 | ||
229 | .tf_read = ahci_tf_read, | |
230 | ||
4bd00f6a | 231 | .probe_reset = ahci_probe_reset, |
1da177e4 LT |
232 | |
233 | .qc_prep = ahci_qc_prep, | |
234 | .qc_issue = ahci_qc_issue, | |
235 | ||
236 | .eng_timeout = ahci_eng_timeout, | |
237 | ||
238 | .irq_handler = ahci_interrupt, | |
239 | .irq_clear = ahci_irq_clear, | |
240 | ||
241 | .scr_read = ahci_scr_read, | |
242 | .scr_write = ahci_scr_write, | |
243 | ||
244 | .port_start = ahci_port_start, | |
245 | .port_stop = ahci_port_stop, | |
1da177e4 LT |
246 | }; |
247 | ||
98ac62de | 248 | static const struct ata_port_info ahci_port_info[] = { |
1da177e4 LT |
249 | /* board_ahci */ |
250 | { | |
251 | .sht = &ahci_sht, | |
252 | .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | | |
4bd00f6a | 253 | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA, |
7da79312 | 254 | .pio_mask = 0x1f, /* pio0-4 */ |
1da177e4 LT |
255 | .udma_mask = 0x7f, /* udma0-6 ; FIXME */ |
256 | .port_ops = &ahci_ops, | |
257 | }, | |
258 | }; | |
259 | ||
3b7d697d | 260 | static const struct pci_device_id ahci_pci_tbl[] = { |
1da177e4 LT |
261 | { PCI_VENDOR_ID_INTEL, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
262 | board_ahci }, /* ICH6 */ | |
263 | { PCI_VENDOR_ID_INTEL, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0, | |
264 | board_ahci }, /* ICH6M */ | |
265 | { PCI_VENDOR_ID_INTEL, 0x27c1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, | |
266 | board_ahci }, /* ICH7 */ | |
267 | { PCI_VENDOR_ID_INTEL, 0x27c5, PCI_ANY_ID, PCI_ANY_ID, 0, 0, | |
268 | board_ahci }, /* ICH7M */ | |
269 | { PCI_VENDOR_ID_INTEL, 0x27c3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, | |
270 | board_ahci }, /* ICH7R */ | |
271 | { PCI_VENDOR_ID_AL, 0x5288, PCI_ANY_ID, PCI_ANY_ID, 0, 0, | |
272 | board_ahci }, /* ULi M5288 */ | |
680d3235 JG |
273 | { PCI_VENDOR_ID_INTEL, 0x2681, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
274 | board_ahci }, /* ESB2 */ | |
275 | { PCI_VENDOR_ID_INTEL, 0x2682, PCI_ANY_ID, PCI_ANY_ID, 0, 0, | |
276 | board_ahci }, /* ESB2 */ | |
277 | { PCI_VENDOR_ID_INTEL, 0x2683, PCI_ANY_ID, PCI_ANY_ID, 0, 0, | |
278 | board_ahci }, /* ESB2 */ | |
3db368f7 JG |
279 | { PCI_VENDOR_ID_INTEL, 0x27c6, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
280 | board_ahci }, /* ICH7-M DH */ | |
f285757c JG |
281 | { PCI_VENDOR_ID_INTEL, 0x2821, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
282 | board_ahci }, /* ICH8 */ | |
283 | { PCI_VENDOR_ID_INTEL, 0x2822, PCI_ANY_ID, PCI_ANY_ID, 0, 0, | |
284 | board_ahci }, /* ICH8 */ | |
285 | { PCI_VENDOR_ID_INTEL, 0x2824, PCI_ANY_ID, PCI_ANY_ID, 0, 0, | |
286 | board_ahci }, /* ICH8 */ | |
287 | { PCI_VENDOR_ID_INTEL, 0x2829, PCI_ANY_ID, PCI_ANY_ID, 0, 0, | |
288 | board_ahci }, /* ICH8M */ | |
289 | { PCI_VENDOR_ID_INTEL, 0x282a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, | |
290 | board_ahci }, /* ICH8M */ | |
bd12097c JG |
291 | { 0x197b, 0x2360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
292 | board_ahci }, /* JMicron JMB360 */ | |
9220a2d0 JG |
293 | { 0x197b, 0x2363, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
294 | board_ahci }, /* JMicron JMB363 */ | |
8b316a39 JG |
295 | { PCI_VENDOR_ID_ATI, 0x4380, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
296 | board_ahci }, /* ATI SB600 non-raid */ | |
297 | { PCI_VENDOR_ID_ATI, 0x4381, PCI_ANY_ID, PCI_ANY_ID, 0, 0, | |
298 | board_ahci }, /* ATI SB600 raid */ | |
1da177e4 LT |
299 | { } /* terminate list */ |
300 | }; | |
301 | ||
302 | ||
303 | static struct pci_driver ahci_pci_driver = { | |
304 | .name = DRV_NAME, | |
305 | .id_table = ahci_pci_tbl, | |
306 | .probe = ahci_init_one, | |
907f4678 | 307 | .remove = ahci_remove_one, |
1da177e4 LT |
308 | }; |
309 | ||
310 | ||
311 | static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port) | |
312 | { | |
313 | return base + 0x100 + (port * 0x80); | |
314 | } | |
315 | ||
ea6ba10b | 316 | static inline void __iomem *ahci_port_base (void __iomem *base, unsigned int port) |
1da177e4 | 317 | { |
ea6ba10b | 318 | return (void __iomem *) ahci_port_base_ul((unsigned long)base, port); |
1da177e4 LT |
319 | } |
320 | ||
1da177e4 LT |
321 | static int ahci_port_start(struct ata_port *ap) |
322 | { | |
323 | struct device *dev = ap->host_set->dev; | |
324 | struct ahci_host_priv *hpriv = ap->host_set->private_data; | |
325 | struct ahci_port_priv *pp; | |
ea6ba10b JG |
326 | void __iomem *mmio = ap->host_set->mmio_base; |
327 | void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); | |
328 | void *mem; | |
1da177e4 | 329 | dma_addr_t mem_dma; |
6037d6bb | 330 | int rc; |
1da177e4 | 331 | |
1da177e4 | 332 | pp = kmalloc(sizeof(*pp), GFP_KERNEL); |
0a139e79 TH |
333 | if (!pp) |
334 | return -ENOMEM; | |
1da177e4 LT |
335 | memset(pp, 0, sizeof(*pp)); |
336 | ||
6037d6bb JG |
337 | rc = ata_pad_alloc(ap, dev); |
338 | if (rc) { | |
cedc9a47 | 339 | kfree(pp); |
6037d6bb | 340 | return rc; |
cedc9a47 JG |
341 | } |
342 | ||
1da177e4 LT |
343 | mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL); |
344 | if (!mem) { | |
6037d6bb | 345 | ata_pad_free(ap, dev); |
0a139e79 TH |
346 | kfree(pp); |
347 | return -ENOMEM; | |
1da177e4 LT |
348 | } |
349 | memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ); | |
350 | ||
351 | /* | |
352 | * First item in chunk of DMA memory: 32-slot command table, | |
353 | * 32 bytes each in size | |
354 | */ | |
355 | pp->cmd_slot = mem; | |
356 | pp->cmd_slot_dma = mem_dma; | |
357 | ||
358 | mem += AHCI_CMD_SLOT_SZ; | |
359 | mem_dma += AHCI_CMD_SLOT_SZ; | |
360 | ||
361 | /* | |
362 | * Second item: Received-FIS area | |
363 | */ | |
364 | pp->rx_fis = mem; | |
365 | pp->rx_fis_dma = mem_dma; | |
366 | ||
367 | mem += AHCI_RX_FIS_SZ; | |
368 | mem_dma += AHCI_RX_FIS_SZ; | |
369 | ||
370 | /* | |
371 | * Third item: data area for storing a single command | |
372 | * and its scatter-gather table | |
373 | */ | |
374 | pp->cmd_tbl = mem; | |
375 | pp->cmd_tbl_dma = mem_dma; | |
376 | ||
377 | pp->cmd_tbl_sg = mem + AHCI_CMD_TBL_HDR; | |
378 | ||
379 | ap->private_data = pp; | |
380 | ||
381 | if (hpriv->cap & HOST_CAP_64) | |
382 | writel((pp->cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI); | |
383 | writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR); | |
384 | readl(port_mmio + PORT_LST_ADDR); /* flush */ | |
385 | ||
386 | if (hpriv->cap & HOST_CAP_64) | |
387 | writel((pp->rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI); | |
388 | writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR); | |
389 | readl(port_mmio + PORT_FIS_ADDR); /* flush */ | |
390 | ||
391 | writel(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX | | |
392 | PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP | | |
393 | PORT_CMD_START, port_mmio + PORT_CMD); | |
394 | readl(port_mmio + PORT_CMD); /* flush */ | |
395 | ||
396 | return 0; | |
1da177e4 LT |
397 | } |
398 | ||
399 | ||
400 | static void ahci_port_stop(struct ata_port *ap) | |
401 | { | |
402 | struct device *dev = ap->host_set->dev; | |
403 | struct ahci_port_priv *pp = ap->private_data; | |
ea6ba10b JG |
404 | void __iomem *mmio = ap->host_set->mmio_base; |
405 | void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); | |
1da177e4 LT |
406 | u32 tmp; |
407 | ||
408 | tmp = readl(port_mmio + PORT_CMD); | |
409 | tmp &= ~(PORT_CMD_START | PORT_CMD_FIS_RX); | |
410 | writel(tmp, port_mmio + PORT_CMD); | |
411 | readl(port_mmio + PORT_CMD); /* flush */ | |
412 | ||
413 | /* spec says 500 msecs for each PORT_CMD_{START,FIS_RX} bit, so | |
414 | * this is slightly incorrect. | |
415 | */ | |
416 | msleep(500); | |
417 | ||
418 | ap->private_data = NULL; | |
419 | dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, | |
420 | pp->cmd_slot, pp->cmd_slot_dma); | |
6037d6bb | 421 | ata_pad_free(ap, dev); |
1da177e4 | 422 | kfree(pp); |
1da177e4 LT |
423 | } |
424 | ||
425 | static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in) | |
426 | { | |
427 | unsigned int sc_reg; | |
428 | ||
429 | switch (sc_reg_in) { | |
430 | case SCR_STATUS: sc_reg = 0; break; | |
431 | case SCR_CONTROL: sc_reg = 1; break; | |
432 | case SCR_ERROR: sc_reg = 2; break; | |
433 | case SCR_ACTIVE: sc_reg = 3; break; | |
434 | default: | |
435 | return 0xffffffffU; | |
436 | } | |
437 | ||
1e4f2a96 | 438 | return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4)); |
1da177e4 LT |
439 | } |
440 | ||
441 | ||
442 | static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in, | |
443 | u32 val) | |
444 | { | |
445 | unsigned int sc_reg; | |
446 | ||
447 | switch (sc_reg_in) { | |
448 | case SCR_STATUS: sc_reg = 0; break; | |
449 | case SCR_CONTROL: sc_reg = 1; break; | |
450 | case SCR_ERROR: sc_reg = 2; break; | |
451 | case SCR_ACTIVE: sc_reg = 3; break; | |
452 | default: | |
453 | return; | |
454 | } | |
455 | ||
1e4f2a96 | 456 | writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4)); |
1da177e4 LT |
457 | } |
458 | ||
7c76d1e8 TH |
459 | static int ahci_stop_engine(struct ata_port *ap) |
460 | { | |
461 | void __iomem *mmio = ap->host_set->mmio_base; | |
462 | void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); | |
463 | int work; | |
464 | u32 tmp; | |
465 | ||
466 | tmp = readl(port_mmio + PORT_CMD); | |
467 | tmp &= ~PORT_CMD_START; | |
468 | writel(tmp, port_mmio + PORT_CMD); | |
469 | ||
470 | /* wait for engine to stop. TODO: this could be | |
471 | * as long as 500 msec | |
472 | */ | |
473 | work = 1000; | |
474 | while (work-- > 0) { | |
475 | tmp = readl(port_mmio + PORT_CMD); | |
476 | if ((tmp & PORT_CMD_LIST_ON) == 0) | |
477 | return 0; | |
478 | udelay(10); | |
479 | } | |
480 | ||
481 | return -EIO; | |
482 | } | |
483 | ||
484 | static void ahci_start_engine(struct ata_port *ap) | |
485 | { | |
486 | void __iomem *mmio = ap->host_set->mmio_base; | |
487 | void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); | |
488 | u32 tmp; | |
489 | ||
490 | tmp = readl(port_mmio + PORT_CMD); | |
491 | tmp |= PORT_CMD_START; | |
492 | writel(tmp, port_mmio + PORT_CMD); | |
493 | readl(port_mmio + PORT_CMD); /* flush */ | |
494 | } | |
495 | ||
422b7595 | 496 | static unsigned int ahci_dev_classify(struct ata_port *ap) |
1da177e4 LT |
497 | { |
498 | void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr; | |
499 | struct ata_taskfile tf; | |
422b7595 TH |
500 | u32 tmp; |
501 | ||
502 | tmp = readl(port_mmio + PORT_SIG); | |
503 | tf.lbah = (tmp >> 24) & 0xff; | |
504 | tf.lbam = (tmp >> 16) & 0xff; | |
505 | tf.lbal = (tmp >> 8) & 0xff; | |
506 | tf.nsect = (tmp) & 0xff; | |
507 | ||
508 | return ata_dev_classify(&tf); | |
509 | } | |
510 | ||
a42fc659 | 511 | static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, u32 opts) |
cc9278ed | 512 | { |
cc9278ed TH |
513 | pp->cmd_slot[0].opts = cpu_to_le32(opts); |
514 | pp->cmd_slot[0].status = 0; | |
515 | pp->cmd_slot[0].tbl_addr = cpu_to_le32(pp->cmd_tbl_dma & 0xffffffff); | |
516 | pp->cmd_slot[0].tbl_addr_hi = cpu_to_le32((pp->cmd_tbl_dma >> 16) >> 16); | |
517 | } | |
518 | ||
4658f79b TH |
519 | static int ahci_poll_register(void __iomem *reg, u32 mask, u32 val, |
520 | unsigned long interval_msec, | |
521 | unsigned long timeout_msec) | |
522 | { | |
523 | unsigned long timeout; | |
524 | u32 tmp; | |
525 | ||
526 | timeout = jiffies + (timeout_msec * HZ) / 1000; | |
527 | do { | |
528 | tmp = readl(reg); | |
529 | if ((tmp & mask) == val) | |
530 | return 0; | |
531 | msleep(interval_msec); | |
532 | } while (time_before(jiffies, timeout)); | |
533 | ||
534 | return -1; | |
535 | } | |
536 | ||
537 | static int ahci_softreset(struct ata_port *ap, int verbose, unsigned int *class) | |
538 | { | |
539 | struct ahci_host_priv *hpriv = ap->host_set->private_data; | |
540 | struct ahci_port_priv *pp = ap->private_data; | |
541 | void __iomem *mmio = ap->host_set->mmio_base; | |
542 | void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); | |
543 | const u32 cmd_fis_len = 5; /* five dwords */ | |
544 | const char *reason = NULL; | |
545 | struct ata_taskfile tf; | |
546 | u8 *fis; | |
547 | int rc; | |
548 | ||
549 | DPRINTK("ENTER\n"); | |
550 | ||
c2a65852 TH |
551 | if (!sata_dev_present(ap)) { |
552 | DPRINTK("PHY reports no device\n"); | |
553 | *class = ATA_DEV_NONE; | |
554 | return 0; | |
555 | } | |
556 | ||
4658f79b TH |
557 | /* prepare for SRST (AHCI-1.1 10.4.1) */ |
558 | rc = ahci_stop_engine(ap); | |
559 | if (rc) { | |
560 | reason = "failed to stop engine"; | |
561 | goto fail_restart; | |
562 | } | |
563 | ||
564 | /* check BUSY/DRQ, perform Command List Override if necessary */ | |
565 | ahci_tf_read(ap, &tf); | |
566 | if (tf.command & (ATA_BUSY | ATA_DRQ)) { | |
567 | u32 tmp; | |
568 | ||
569 | if (!(hpriv->cap & HOST_CAP_CLO)) { | |
570 | rc = -EIO; | |
571 | reason = "port busy but no CLO"; | |
572 | goto fail_restart; | |
573 | } | |
574 | ||
575 | tmp = readl(port_mmio + PORT_CMD); | |
576 | tmp |= PORT_CMD_CLO; | |
577 | writel(tmp, port_mmio + PORT_CMD); | |
578 | readl(port_mmio + PORT_CMD); /* flush */ | |
579 | ||
580 | if (ahci_poll_register(port_mmio + PORT_CMD, PORT_CMD_CLO, 0x0, | |
581 | 1, 500)) { | |
582 | rc = -EIO; | |
583 | reason = "CLO failed"; | |
584 | goto fail_restart; | |
585 | } | |
586 | } | |
587 | ||
588 | /* restart engine */ | |
589 | ahci_start_engine(ap); | |
590 | ||
591 | ata_tf_init(ap, &tf, 0); | |
592 | fis = pp->cmd_tbl; | |
593 | ||
594 | /* issue the first D2H Register FIS */ | |
595 | ahci_fill_cmd_slot(pp, cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY); | |
596 | ||
597 | tf.ctl |= ATA_SRST; | |
598 | ata_tf_to_fis(&tf, fis, 0); | |
599 | fis[1] &= ~(1 << 7); /* turn off Command FIS bit */ | |
600 | ||
601 | writel(1, port_mmio + PORT_CMD_ISSUE); | |
602 | readl(port_mmio + PORT_CMD_ISSUE); /* flush */ | |
603 | ||
604 | if (ahci_poll_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x0, 1, 500)) { | |
605 | rc = -EIO; | |
606 | reason = "1st FIS failed"; | |
607 | goto fail; | |
608 | } | |
609 | ||
610 | /* spec says at least 5us, but be generous and sleep for 1ms */ | |
611 | msleep(1); | |
612 | ||
613 | /* issue the second D2H Register FIS */ | |
614 | ahci_fill_cmd_slot(pp, cmd_fis_len); | |
615 | ||
616 | tf.ctl &= ~ATA_SRST; | |
617 | ata_tf_to_fis(&tf, fis, 0); | |
618 | fis[1] &= ~(1 << 7); /* turn off Command FIS bit */ | |
619 | ||
620 | writel(1, port_mmio + PORT_CMD_ISSUE); | |
621 | readl(port_mmio + PORT_CMD_ISSUE); /* flush */ | |
622 | ||
623 | /* spec mandates ">= 2ms" before checking status. | |
624 | * We wait 150ms, because that was the magic delay used for | |
625 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time | |
626 | * between when the ATA command register is written, and then | |
627 | * status is checked. Because waiting for "a while" before | |
628 | * checking status is fine, post SRST, we perform this magic | |
629 | * delay here as well. | |
630 | */ | |
631 | msleep(150); | |
632 | ||
633 | *class = ATA_DEV_NONE; | |
634 | if (sata_dev_present(ap)) { | |
635 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
636 | rc = -EIO; | |
637 | reason = "device not ready"; | |
638 | goto fail; | |
639 | } | |
640 | *class = ahci_dev_classify(ap); | |
641 | } | |
642 | ||
643 | DPRINTK("EXIT, class=%u\n", *class); | |
644 | return 0; | |
645 | ||
646 | fail_restart: | |
647 | ahci_start_engine(ap); | |
648 | fail: | |
649 | if (verbose) | |
650 | printk(KERN_ERR "ata%u: softreset failed (%s)\n", | |
651 | ap->id, reason); | |
652 | else | |
653 | DPRINTK("EXIT, rc=%d reason=\"%s\"\n", rc, reason); | |
654 | return rc; | |
655 | } | |
656 | ||
4bd00f6a | 657 | static int ahci_hardreset(struct ata_port *ap, int verbose, unsigned int *class) |
422b7595 | 658 | { |
4bd00f6a TH |
659 | int rc; |
660 | ||
661 | DPRINTK("ENTER\n"); | |
1da177e4 | 662 | |
e0bfd149 | 663 | ahci_stop_engine(ap); |
4bd00f6a | 664 | rc = sata_std_hardreset(ap, verbose, class); |
e0bfd149 | 665 | ahci_start_engine(ap); |
1da177e4 | 666 | |
4bd00f6a TH |
667 | if (rc == 0) |
668 | *class = ahci_dev_classify(ap); | |
669 | if (*class == ATA_DEV_UNKNOWN) | |
670 | *class = ATA_DEV_NONE; | |
1da177e4 | 671 | |
4bd00f6a TH |
672 | DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class); |
673 | return rc; | |
674 | } | |
675 | ||
676 | static void ahci_postreset(struct ata_port *ap, unsigned int *class) | |
677 | { | |
678 | void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr; | |
679 | u32 new_tmp, tmp; | |
680 | ||
681 | ata_std_postreset(ap, class); | |
02eaa666 JG |
682 | |
683 | /* Make sure port's ATAPI bit is set appropriately */ | |
684 | new_tmp = tmp = readl(port_mmio + PORT_CMD); | |
4bd00f6a | 685 | if (*class == ATA_DEV_ATAPI) |
02eaa666 JG |
686 | new_tmp |= PORT_CMD_ATAPI; |
687 | else | |
688 | new_tmp &= ~PORT_CMD_ATAPI; | |
689 | if (new_tmp != tmp) { | |
690 | writel(new_tmp, port_mmio + PORT_CMD); | |
691 | readl(port_mmio + PORT_CMD); /* flush */ | |
692 | } | |
1da177e4 LT |
693 | } |
694 | ||
4bd00f6a TH |
695 | static int ahci_probe_reset(struct ata_port *ap, unsigned int *classes) |
696 | { | |
4658f79b TH |
697 | return ata_drive_probe_reset(ap, ata_std_probeinit, |
698 | ahci_softreset, ahci_hardreset, | |
4bd00f6a TH |
699 | ahci_postreset, classes); |
700 | } | |
701 | ||
1da177e4 LT |
702 | static u8 ahci_check_status(struct ata_port *ap) |
703 | { | |
1e4f2a96 | 704 | void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr; |
1da177e4 LT |
705 | |
706 | return readl(mmio + PORT_TFDATA) & 0xFF; | |
707 | } | |
708 | ||
1da177e4 LT |
709 | static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf) |
710 | { | |
711 | struct ahci_port_priv *pp = ap->private_data; | |
712 | u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG; | |
713 | ||
714 | ata_tf_from_fis(d2h_fis, tf); | |
715 | } | |
716 | ||
828d09de | 717 | static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc) |
1da177e4 LT |
718 | { |
719 | struct ahci_port_priv *pp = qc->ap->private_data; | |
cedc9a47 JG |
720 | struct scatterlist *sg; |
721 | struct ahci_sg *ahci_sg; | |
828d09de | 722 | unsigned int n_sg = 0; |
1da177e4 LT |
723 | |
724 | VPRINTK("ENTER\n"); | |
725 | ||
726 | /* | |
727 | * Next, the S/G list. | |
728 | */ | |
cedc9a47 JG |
729 | ahci_sg = pp->cmd_tbl_sg; |
730 | ata_for_each_sg(sg, qc) { | |
731 | dma_addr_t addr = sg_dma_address(sg); | |
732 | u32 sg_len = sg_dma_len(sg); | |
733 | ||
734 | ahci_sg->addr = cpu_to_le32(addr & 0xffffffff); | |
735 | ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16); | |
736 | ahci_sg->flags_size = cpu_to_le32(sg_len - 1); | |
828d09de | 737 | |
cedc9a47 | 738 | ahci_sg++; |
828d09de | 739 | n_sg++; |
1da177e4 | 740 | } |
828d09de JG |
741 | |
742 | return n_sg; | |
1da177e4 LT |
743 | } |
744 | ||
745 | static void ahci_qc_prep(struct ata_queued_cmd *qc) | |
746 | { | |
a0ea7328 JG |
747 | struct ata_port *ap = qc->ap; |
748 | struct ahci_port_priv *pp = ap->private_data; | |
cc9278ed | 749 | int is_atapi = is_atapi_taskfile(&qc->tf); |
1da177e4 LT |
750 | u32 opts; |
751 | const u32 cmd_fis_len = 5; /* five dwords */ | |
828d09de | 752 | unsigned int n_elem; |
1da177e4 | 753 | |
1da177e4 LT |
754 | /* |
755 | * Fill in command table information. First, the header, | |
756 | * a SATA Register - Host to Device command FIS. | |
757 | */ | |
758 | ata_tf_to_fis(&qc->tf, pp->cmd_tbl, 0); | |
cc9278ed | 759 | if (is_atapi) { |
a0ea7328 | 760 | memset(pp->cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32); |
6e7846e9 TH |
761 | memcpy(pp->cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, |
762 | qc->dev->cdb_len); | |
a0ea7328 | 763 | } |
1da177e4 | 764 | |
cc9278ed TH |
765 | n_elem = 0; |
766 | if (qc->flags & ATA_QCFLAG_DMAMAP) | |
767 | n_elem = ahci_fill_sg(qc); | |
1da177e4 | 768 | |
cc9278ed TH |
769 | /* |
770 | * Fill in command slot information. | |
771 | */ | |
772 | opts = cmd_fis_len | n_elem << 16; | |
773 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
774 | opts |= AHCI_CMD_WRITE; | |
775 | if (is_atapi) | |
4b10e559 | 776 | opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH; |
828d09de | 777 | |
a42fc659 | 778 | ahci_fill_cmd_slot(pp, opts); |
1da177e4 LT |
779 | } |
780 | ||
c2cd76ff | 781 | static void ahci_restart_port(struct ata_port *ap, u32 irq_stat) |
1da177e4 | 782 | { |
ea6ba10b JG |
783 | void __iomem *mmio = ap->host_set->mmio_base; |
784 | void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); | |
1da177e4 | 785 | u32 tmp; |
1da177e4 | 786 | |
c2cd76ff JG |
787 | if ((ap->device[0].class != ATA_DEV_ATAPI) || |
788 | ((irq_stat & PORT_IRQ_TF_ERR) == 0)) | |
789 | printk(KERN_WARNING "ata%u: port reset, " | |
790 | "p_is %x is %x pis %x cmd %x tf %x ss %x se %x\n", | |
791 | ap->id, | |
792 | irq_stat, | |
793 | readl(mmio + HOST_IRQ_STAT), | |
794 | readl(port_mmio + PORT_IRQ_STAT), | |
795 | readl(port_mmio + PORT_CMD), | |
796 | readl(port_mmio + PORT_TFDATA), | |
797 | readl(port_mmio + PORT_SCR_STAT), | |
798 | readl(port_mmio + PORT_SCR_ERR)); | |
9f68a248 | 799 | |
1da177e4 | 800 | /* stop DMA */ |
7c76d1e8 | 801 | ahci_stop_engine(ap); |
1da177e4 LT |
802 | |
803 | /* clear SATA phy error, if any */ | |
804 | tmp = readl(port_mmio + PORT_SCR_ERR); | |
805 | writel(tmp, port_mmio + PORT_SCR_ERR); | |
806 | ||
807 | /* if DRQ/BSY is set, device needs to be reset. | |
808 | * if so, issue COMRESET | |
809 | */ | |
810 | tmp = readl(port_mmio + PORT_TFDATA); | |
811 | if (tmp & (ATA_BUSY | ATA_DRQ)) { | |
812 | writel(0x301, port_mmio + PORT_SCR_CTL); | |
813 | readl(port_mmio + PORT_SCR_CTL); /* flush */ | |
814 | udelay(10); | |
815 | writel(0x300, port_mmio + PORT_SCR_CTL); | |
816 | readl(port_mmio + PORT_SCR_CTL); /* flush */ | |
817 | } | |
818 | ||
819 | /* re-start DMA */ | |
7c76d1e8 | 820 | ahci_start_engine(ap); |
1da177e4 LT |
821 | } |
822 | ||
823 | static void ahci_eng_timeout(struct ata_port *ap) | |
824 | { | |
b8f6153e | 825 | struct ata_host_set *host_set = ap->host_set; |
ea6ba10b JG |
826 | void __iomem *mmio = host_set->mmio_base; |
827 | void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); | |
1da177e4 | 828 | struct ata_queued_cmd *qc; |
b8f6153e | 829 | unsigned long flags; |
1da177e4 | 830 | |
9f68a248 | 831 | printk(KERN_WARNING "ata%u: handling error/timeout\n", ap->id); |
1da177e4 | 832 | |
b8f6153e JG |
833 | spin_lock_irqsave(&host_set->lock, flags); |
834 | ||
f6379020 | 835 | ahci_restart_port(ap, readl(port_mmio + PORT_IRQ_STAT)); |
1da177e4 | 836 | qc = ata_qc_from_tag(ap, ap->active_tag); |
f6379020 | 837 | qc->err_mask |= AC_ERR_TIMEOUT; |
1da177e4 | 838 | |
b8f6153e | 839 | spin_unlock_irqrestore(&host_set->lock, flags); |
a72ec4ce | 840 | |
f6379020 | 841 | ata_eh_qc_complete(qc); |
1da177e4 LT |
842 | } |
843 | ||
844 | static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc) | |
845 | { | |
ea6ba10b JG |
846 | void __iomem *mmio = ap->host_set->mmio_base; |
847 | void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); | |
1da177e4 LT |
848 | u32 status, serr, ci; |
849 | ||
850 | serr = readl(port_mmio + PORT_SCR_ERR); | |
851 | writel(serr, port_mmio + PORT_SCR_ERR); | |
852 | ||
853 | status = readl(port_mmio + PORT_IRQ_STAT); | |
854 | writel(status, port_mmio + PORT_IRQ_STAT); | |
855 | ||
856 | ci = readl(port_mmio + PORT_CMD_ISSUE); | |
857 | if (likely((ci & 0x1) == 0)) { | |
858 | if (qc) { | |
beec7dbc | 859 | WARN_ON(qc->err_mask); |
a22e2eb0 | 860 | ata_qc_complete(qc); |
1da177e4 LT |
861 | qc = NULL; |
862 | } | |
863 | } | |
864 | ||
865 | if (status & PORT_IRQ_FATAL) { | |
ad36d1a5 JG |
866 | unsigned int err_mask; |
867 | if (status & PORT_IRQ_TF_ERR) | |
868 | err_mask = AC_ERR_DEV; | |
869 | else if (status & PORT_IRQ_IF_ERR) | |
870 | err_mask = AC_ERR_ATA_BUS; | |
871 | else | |
872 | err_mask = AC_ERR_HOST_BUS; | |
873 | ||
9f68a248 | 874 | /* command processing has stopped due to error; restart */ |
c2cd76ff | 875 | ahci_restart_port(ap, status); |
9f68a248 | 876 | |
a22e2eb0 | 877 | if (qc) { |
284b6481 | 878 | qc->err_mask |= err_mask; |
a22e2eb0 AL |
879 | ata_qc_complete(qc); |
880 | } | |
1da177e4 LT |
881 | } |
882 | ||
883 | return 1; | |
884 | } | |
885 | ||
886 | static void ahci_irq_clear(struct ata_port *ap) | |
887 | { | |
888 | /* TODO */ | |
889 | } | |
890 | ||
891 | static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs) | |
892 | { | |
893 | struct ata_host_set *host_set = dev_instance; | |
894 | struct ahci_host_priv *hpriv; | |
895 | unsigned int i, handled = 0; | |
ea6ba10b | 896 | void __iomem *mmio; |
1da177e4 LT |
897 | u32 irq_stat, irq_ack = 0; |
898 | ||
899 | VPRINTK("ENTER\n"); | |
900 | ||
901 | hpriv = host_set->private_data; | |
902 | mmio = host_set->mmio_base; | |
903 | ||
904 | /* sigh. 0xffffffff is a valid return from h/w */ | |
905 | irq_stat = readl(mmio + HOST_IRQ_STAT); | |
906 | irq_stat &= hpriv->port_map; | |
907 | if (!irq_stat) | |
908 | return IRQ_NONE; | |
909 | ||
910 | spin_lock(&host_set->lock); | |
911 | ||
912 | for (i = 0; i < host_set->n_ports; i++) { | |
913 | struct ata_port *ap; | |
1da177e4 | 914 | |
67846b30 JG |
915 | if (!(irq_stat & (1 << i))) |
916 | continue; | |
917 | ||
1da177e4 | 918 | ap = host_set->ports[i]; |
67846b30 | 919 | if (ap) { |
1da177e4 LT |
920 | struct ata_queued_cmd *qc; |
921 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
67846b30 | 922 | if (!ahci_host_intr(ap, qc)) |
6971ed1f TH |
923 | if (ata_ratelimit()) |
924 | dev_printk(KERN_WARNING, host_set->dev, | |
a9524a76 JG |
925 | "unhandled interrupt on port %u\n", |
926 | i); | |
67846b30 JG |
927 | |
928 | VPRINTK("port %u\n", i); | |
929 | } else { | |
930 | VPRINTK("port %u (no irq)\n", i); | |
6971ed1f TH |
931 | if (ata_ratelimit()) |
932 | dev_printk(KERN_WARNING, host_set->dev, | |
a9524a76 | 933 | "interrupt on disabled port %u\n", i); |
1da177e4 | 934 | } |
67846b30 JG |
935 | |
936 | irq_ack |= (1 << i); | |
1da177e4 LT |
937 | } |
938 | ||
939 | if (irq_ack) { | |
940 | writel(irq_ack, mmio + HOST_IRQ_STAT); | |
941 | handled = 1; | |
942 | } | |
943 | ||
944 | spin_unlock(&host_set->lock); | |
945 | ||
946 | VPRINTK("EXIT\n"); | |
947 | ||
948 | return IRQ_RETVAL(handled); | |
949 | } | |
950 | ||
9a3d9eb0 | 951 | static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
952 | { |
953 | struct ata_port *ap = qc->ap; | |
ea6ba10b | 954 | void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr; |
1da177e4 | 955 | |
1da177e4 LT |
956 | writel(1, port_mmio + PORT_CMD_ISSUE); |
957 | readl(port_mmio + PORT_CMD_ISSUE); /* flush */ | |
958 | ||
959 | return 0; | |
960 | } | |
961 | ||
962 | static void ahci_setup_port(struct ata_ioports *port, unsigned long base, | |
963 | unsigned int port_idx) | |
964 | { | |
965 | VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx); | |
966 | base = ahci_port_base_ul(base, port_idx); | |
967 | VPRINTK("base now==0x%lx\n", base); | |
968 | ||
969 | port->cmd_addr = base; | |
970 | port->scr_addr = base + PORT_SCR; | |
971 | ||
972 | VPRINTK("EXIT\n"); | |
973 | } | |
974 | ||
975 | static int ahci_host_init(struct ata_probe_ent *probe_ent) | |
976 | { | |
977 | struct ahci_host_priv *hpriv = probe_ent->private_data; | |
978 | struct pci_dev *pdev = to_pci_dev(probe_ent->dev); | |
979 | void __iomem *mmio = probe_ent->mmio_base; | |
980 | u32 tmp, cap_save; | |
1da177e4 LT |
981 | unsigned int i, j, using_dac; |
982 | int rc; | |
983 | void __iomem *port_mmio; | |
984 | ||
985 | cap_save = readl(mmio + HOST_CAP); | |
986 | cap_save &= ( (1<<28) | (1<<17) ); | |
987 | cap_save |= (1 << 27); | |
988 | ||
989 | /* global controller reset */ | |
990 | tmp = readl(mmio + HOST_CTL); | |
991 | if ((tmp & HOST_RESET) == 0) { | |
992 | writel(tmp | HOST_RESET, mmio + HOST_CTL); | |
993 | readl(mmio + HOST_CTL); /* flush */ | |
994 | } | |
995 | ||
996 | /* reset must complete within 1 second, or | |
997 | * the hardware should be considered fried. | |
998 | */ | |
999 | ssleep(1); | |
1000 | ||
1001 | tmp = readl(mmio + HOST_CTL); | |
1002 | if (tmp & HOST_RESET) { | |
a9524a76 JG |
1003 | dev_printk(KERN_ERR, &pdev->dev, |
1004 | "controller reset failed (0x%x)\n", tmp); | |
1da177e4 LT |
1005 | return -EIO; |
1006 | } | |
1007 | ||
1008 | writel(HOST_AHCI_EN, mmio + HOST_CTL); | |
1009 | (void) readl(mmio + HOST_CTL); /* flush */ | |
1010 | writel(cap_save, mmio + HOST_CAP); | |
1011 | writel(0xf, mmio + HOST_PORTS_IMPL); | |
1012 | (void) readl(mmio + HOST_PORTS_IMPL); /* flush */ | |
1013 | ||
bd12097c JG |
1014 | if (pdev->vendor == PCI_VENDOR_ID_INTEL) { |
1015 | u16 tmp16; | |
1016 | ||
1017 | pci_read_config_word(pdev, 0x92, &tmp16); | |
1018 | tmp16 |= 0xf; | |
1019 | pci_write_config_word(pdev, 0x92, tmp16); | |
1020 | } | |
1da177e4 LT |
1021 | |
1022 | hpriv->cap = readl(mmio + HOST_CAP); | |
1023 | hpriv->port_map = readl(mmio + HOST_PORTS_IMPL); | |
1024 | probe_ent->n_ports = (hpriv->cap & 0x1f) + 1; | |
1025 | ||
1026 | VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n", | |
1027 | hpriv->cap, hpriv->port_map, probe_ent->n_ports); | |
1028 | ||
1029 | using_dac = hpriv->cap & HOST_CAP_64; | |
1030 | if (using_dac && | |
1031 | !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) { | |
1032 | rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK); | |
1033 | if (rc) { | |
1034 | rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); | |
1035 | if (rc) { | |
a9524a76 JG |
1036 | dev_printk(KERN_ERR, &pdev->dev, |
1037 | "64-bit DMA enable failed\n"); | |
1da177e4 LT |
1038 | return rc; |
1039 | } | |
1040 | } | |
1da177e4 LT |
1041 | } else { |
1042 | rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); | |
1043 | if (rc) { | |
a9524a76 JG |
1044 | dev_printk(KERN_ERR, &pdev->dev, |
1045 | "32-bit DMA enable failed\n"); | |
1da177e4 LT |
1046 | return rc; |
1047 | } | |
1048 | rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); | |
1049 | if (rc) { | |
a9524a76 JG |
1050 | dev_printk(KERN_ERR, &pdev->dev, |
1051 | "32-bit consistent DMA enable failed\n"); | |
1da177e4 LT |
1052 | return rc; |
1053 | } | |
1054 | } | |
1055 | ||
1056 | for (i = 0; i < probe_ent->n_ports; i++) { | |
1057 | #if 0 /* BIOSen initialize this incorrectly */ | |
1058 | if (!(hpriv->port_map & (1 << i))) | |
1059 | continue; | |
1060 | #endif | |
1061 | ||
1062 | port_mmio = ahci_port_base(mmio, i); | |
1063 | VPRINTK("mmio %p port_mmio %p\n", mmio, port_mmio); | |
1064 | ||
1065 | ahci_setup_port(&probe_ent->port[i], | |
1066 | (unsigned long) mmio, i); | |
1067 | ||
1068 | /* make sure port is not active */ | |
1069 | tmp = readl(port_mmio + PORT_CMD); | |
1070 | VPRINTK("PORT_CMD 0x%x\n", tmp); | |
1071 | if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON | | |
1072 | PORT_CMD_FIS_RX | PORT_CMD_START)) { | |
1073 | tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON | | |
1074 | PORT_CMD_FIS_RX | PORT_CMD_START); | |
1075 | writel(tmp, port_mmio + PORT_CMD); | |
1076 | readl(port_mmio + PORT_CMD); /* flush */ | |
1077 | ||
1078 | /* spec says 500 msecs for each bit, so | |
1079 | * this is slightly incorrect. | |
1080 | */ | |
1081 | msleep(500); | |
1082 | } | |
1083 | ||
1084 | writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD); | |
1085 | ||
1086 | j = 0; | |
1087 | while (j < 100) { | |
1088 | msleep(10); | |
1089 | tmp = readl(port_mmio + PORT_SCR_STAT); | |
1090 | if ((tmp & 0xf) == 0x3) | |
1091 | break; | |
1092 | j++; | |
1093 | } | |
1094 | ||
1095 | tmp = readl(port_mmio + PORT_SCR_ERR); | |
1096 | VPRINTK("PORT_SCR_ERR 0x%x\n", tmp); | |
1097 | writel(tmp, port_mmio + PORT_SCR_ERR); | |
1098 | ||
1099 | /* ack any pending irq events for this port */ | |
1100 | tmp = readl(port_mmio + PORT_IRQ_STAT); | |
1101 | VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp); | |
1102 | if (tmp) | |
1103 | writel(tmp, port_mmio + PORT_IRQ_STAT); | |
1104 | ||
1105 | writel(1 << i, mmio + HOST_IRQ_STAT); | |
1106 | ||
1107 | /* set irq mask (enables interrupts) */ | |
1108 | writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK); | |
1109 | } | |
1110 | ||
1111 | tmp = readl(mmio + HOST_CTL); | |
1112 | VPRINTK("HOST_CTL 0x%x\n", tmp); | |
1113 | writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL); | |
1114 | tmp = readl(mmio + HOST_CTL); | |
1115 | VPRINTK("HOST_CTL 0x%x\n", tmp); | |
1116 | ||
1117 | pci_set_master(pdev); | |
1118 | ||
1119 | return 0; | |
1120 | } | |
1121 | ||
1da177e4 LT |
1122 | static void ahci_print_info(struct ata_probe_ent *probe_ent) |
1123 | { | |
1124 | struct ahci_host_priv *hpriv = probe_ent->private_data; | |
1125 | struct pci_dev *pdev = to_pci_dev(probe_ent->dev); | |
ea6ba10b | 1126 | void __iomem *mmio = probe_ent->mmio_base; |
1da177e4 LT |
1127 | u32 vers, cap, impl, speed; |
1128 | const char *speed_s; | |
1129 | u16 cc; | |
1130 | const char *scc_s; | |
1131 | ||
1132 | vers = readl(mmio + HOST_VERSION); | |
1133 | cap = hpriv->cap; | |
1134 | impl = hpriv->port_map; | |
1135 | ||
1136 | speed = (cap >> 20) & 0xf; | |
1137 | if (speed == 1) | |
1138 | speed_s = "1.5"; | |
1139 | else if (speed == 2) | |
1140 | speed_s = "3"; | |
1141 | else | |
1142 | speed_s = "?"; | |
1143 | ||
1144 | pci_read_config_word(pdev, 0x0a, &cc); | |
1145 | if (cc == 0x0101) | |
1146 | scc_s = "IDE"; | |
1147 | else if (cc == 0x0106) | |
1148 | scc_s = "SATA"; | |
1149 | else if (cc == 0x0104) | |
1150 | scc_s = "RAID"; | |
1151 | else | |
1152 | scc_s = "unknown"; | |
1153 | ||
a9524a76 JG |
1154 | dev_printk(KERN_INFO, &pdev->dev, |
1155 | "AHCI %02x%02x.%02x%02x " | |
1da177e4 LT |
1156 | "%u slots %u ports %s Gbps 0x%x impl %s mode\n" |
1157 | , | |
1da177e4 LT |
1158 | |
1159 | (vers >> 24) & 0xff, | |
1160 | (vers >> 16) & 0xff, | |
1161 | (vers >> 8) & 0xff, | |
1162 | vers & 0xff, | |
1163 | ||
1164 | ((cap >> 8) & 0x1f) + 1, | |
1165 | (cap & 0x1f) + 1, | |
1166 | speed_s, | |
1167 | impl, | |
1168 | scc_s); | |
1169 | ||
a9524a76 JG |
1170 | dev_printk(KERN_INFO, &pdev->dev, |
1171 | "flags: " | |
1da177e4 LT |
1172 | "%s%s%s%s%s%s" |
1173 | "%s%s%s%s%s%s%s\n" | |
1174 | , | |
1da177e4 LT |
1175 | |
1176 | cap & (1 << 31) ? "64bit " : "", | |
1177 | cap & (1 << 30) ? "ncq " : "", | |
1178 | cap & (1 << 28) ? "ilck " : "", | |
1179 | cap & (1 << 27) ? "stag " : "", | |
1180 | cap & (1 << 26) ? "pm " : "", | |
1181 | cap & (1 << 25) ? "led " : "", | |
1182 | ||
1183 | cap & (1 << 24) ? "clo " : "", | |
1184 | cap & (1 << 19) ? "nz " : "", | |
1185 | cap & (1 << 18) ? "only " : "", | |
1186 | cap & (1 << 17) ? "pmp " : "", | |
1187 | cap & (1 << 15) ? "pio " : "", | |
1188 | cap & (1 << 14) ? "slum " : "", | |
1189 | cap & (1 << 13) ? "part " : "" | |
1190 | ); | |
1191 | } | |
1192 | ||
1193 | static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) | |
1194 | { | |
1195 | static int printed_version; | |
1196 | struct ata_probe_ent *probe_ent = NULL; | |
1197 | struct ahci_host_priv *hpriv; | |
1198 | unsigned long base; | |
ea6ba10b | 1199 | void __iomem *mmio_base; |
1da177e4 | 1200 | unsigned int board_idx = (unsigned int) ent->driver_data; |
907f4678 | 1201 | int have_msi, pci_dev_busy = 0; |
1da177e4 LT |
1202 | int rc; |
1203 | ||
1204 | VPRINTK("ENTER\n"); | |
1205 | ||
1206 | if (!printed_version++) | |
a9524a76 | 1207 | dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); |
1da177e4 LT |
1208 | |
1209 | rc = pci_enable_device(pdev); | |
1210 | if (rc) | |
1211 | return rc; | |
1212 | ||
1213 | rc = pci_request_regions(pdev, DRV_NAME); | |
1214 | if (rc) { | |
1215 | pci_dev_busy = 1; | |
1216 | goto err_out; | |
1217 | } | |
1218 | ||
907f4678 JG |
1219 | if (pci_enable_msi(pdev) == 0) |
1220 | have_msi = 1; | |
1221 | else { | |
1222 | pci_intx(pdev, 1); | |
1223 | have_msi = 0; | |
1224 | } | |
1da177e4 LT |
1225 | |
1226 | probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL); | |
1227 | if (probe_ent == NULL) { | |
1228 | rc = -ENOMEM; | |
907f4678 | 1229 | goto err_out_msi; |
1da177e4 LT |
1230 | } |
1231 | ||
1232 | memset(probe_ent, 0, sizeof(*probe_ent)); | |
1233 | probe_ent->dev = pci_dev_to_dev(pdev); | |
1234 | INIT_LIST_HEAD(&probe_ent->node); | |
1235 | ||
374b1873 | 1236 | mmio_base = pci_iomap(pdev, AHCI_PCI_BAR, 0); |
1da177e4 LT |
1237 | if (mmio_base == NULL) { |
1238 | rc = -ENOMEM; | |
1239 | goto err_out_free_ent; | |
1240 | } | |
1241 | base = (unsigned long) mmio_base; | |
1242 | ||
1243 | hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL); | |
1244 | if (!hpriv) { | |
1245 | rc = -ENOMEM; | |
1246 | goto err_out_iounmap; | |
1247 | } | |
1248 | memset(hpriv, 0, sizeof(*hpriv)); | |
1249 | ||
1250 | probe_ent->sht = ahci_port_info[board_idx].sht; | |
1251 | probe_ent->host_flags = ahci_port_info[board_idx].host_flags; | |
1252 | probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask; | |
1253 | probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask; | |
1254 | probe_ent->port_ops = ahci_port_info[board_idx].port_ops; | |
1255 | ||
1256 | probe_ent->irq = pdev->irq; | |
1257 | probe_ent->irq_flags = SA_SHIRQ; | |
1258 | probe_ent->mmio_base = mmio_base; | |
1259 | probe_ent->private_data = hpriv; | |
1260 | ||
4b0060f4 JG |
1261 | if (have_msi) |
1262 | hpriv->flags |= AHCI_FLAG_MSI; | |
907f4678 | 1263 | |
bd12097c JG |
1264 | /* JMicron-specific fixup: make sure we're in AHCI mode */ |
1265 | if (pdev->vendor == 0x197b) | |
1266 | pci_write_config_byte(pdev, 0x41, 0xa1); | |
1267 | ||
1da177e4 LT |
1268 | /* initialize adapter */ |
1269 | rc = ahci_host_init(probe_ent); | |
1270 | if (rc) | |
1271 | goto err_out_hpriv; | |
1272 | ||
1273 | ahci_print_info(probe_ent); | |
1274 | ||
1275 | /* FIXME: check ata_device_add return value */ | |
1276 | ata_device_add(probe_ent); | |
1277 | kfree(probe_ent); | |
1278 | ||
1279 | return 0; | |
1280 | ||
1281 | err_out_hpriv: | |
1282 | kfree(hpriv); | |
1283 | err_out_iounmap: | |
374b1873 | 1284 | pci_iounmap(pdev, mmio_base); |
1da177e4 LT |
1285 | err_out_free_ent: |
1286 | kfree(probe_ent); | |
907f4678 JG |
1287 | err_out_msi: |
1288 | if (have_msi) | |
1289 | pci_disable_msi(pdev); | |
1290 | else | |
1291 | pci_intx(pdev, 0); | |
1da177e4 LT |
1292 | pci_release_regions(pdev); |
1293 | err_out: | |
1294 | if (!pci_dev_busy) | |
1295 | pci_disable_device(pdev); | |
1296 | return rc; | |
1297 | } | |
1298 | ||
907f4678 JG |
1299 | static void ahci_remove_one (struct pci_dev *pdev) |
1300 | { | |
1301 | struct device *dev = pci_dev_to_dev(pdev); | |
1302 | struct ata_host_set *host_set = dev_get_drvdata(dev); | |
1303 | struct ahci_host_priv *hpriv = host_set->private_data; | |
1304 | struct ata_port *ap; | |
1305 | unsigned int i; | |
1306 | int have_msi; | |
1307 | ||
1308 | for (i = 0; i < host_set->n_ports; i++) { | |
1309 | ap = host_set->ports[i]; | |
1310 | ||
1311 | scsi_remove_host(ap->host); | |
1312 | } | |
1313 | ||
4b0060f4 | 1314 | have_msi = hpriv->flags & AHCI_FLAG_MSI; |
907f4678 | 1315 | free_irq(host_set->irq, host_set); |
907f4678 JG |
1316 | |
1317 | for (i = 0; i < host_set->n_ports; i++) { | |
1318 | ap = host_set->ports[i]; | |
1319 | ||
1320 | ata_scsi_release(ap->host); | |
1321 | scsi_host_put(ap->host); | |
1322 | } | |
1323 | ||
e005f01d | 1324 | kfree(hpriv); |
374b1873 | 1325 | pci_iounmap(pdev, host_set->mmio_base); |
ead5de99 JG |
1326 | kfree(host_set); |
1327 | ||
907f4678 JG |
1328 | if (have_msi) |
1329 | pci_disable_msi(pdev); | |
1330 | else | |
1331 | pci_intx(pdev, 0); | |
1332 | pci_release_regions(pdev); | |
907f4678 JG |
1333 | pci_disable_device(pdev); |
1334 | dev_set_drvdata(dev, NULL); | |
1335 | } | |
1da177e4 LT |
1336 | |
1337 | static int __init ahci_init(void) | |
1338 | { | |
1339 | return pci_module_init(&ahci_pci_driver); | |
1340 | } | |
1341 | ||
1da177e4 LT |
1342 | static void __exit ahci_exit(void) |
1343 | { | |
1344 | pci_unregister_driver(&ahci_pci_driver); | |
1345 | } | |
1346 | ||
1347 | ||
1348 | MODULE_AUTHOR("Jeff Garzik"); | |
1349 | MODULE_DESCRIPTION("AHCI SATA low-level driver"); | |
1350 | MODULE_LICENSE("GPL"); | |
1351 | MODULE_DEVICE_TABLE(pci, ahci_pci_tbl); | |
6885433c | 1352 | MODULE_VERSION(DRV_VERSION); |
1da177e4 LT |
1353 | |
1354 | module_init(ahci_init); | |
1355 | module_exit(ahci_exit); |