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[TUN]: Introduce the tun_net structure and init/exit net ops.
[deliverable/linux.git] / drivers / ata / sata_mv.c
1 /*
2 * sata_mv.c - Marvell SATA support
3 *
4 * Copyright 2005: EMC Corporation, all rights reserved.
5 * Copyright 2005 Red Hat, Inc. All rights reserved.
6 *
7 * Please ALWAYS copy linux-ide@vger.kernel.org on emails.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2 of the License.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24 /*
25 sata_mv TODO list:
26
27 1) Needs a full errata audit for all chipsets. I implemented most
28 of the errata workarounds found in the Marvell vendor driver, but
29 I distinctly remember a couple workarounds (one related to PCI-X)
30 are still needed.
31
32 2) Improve/fix IRQ and error handling sequences.
33
34 3) ATAPI support (Marvell claims the 60xx/70xx chips can do it).
35
36 4) Think about TCQ support here, and for libata in general
37 with controllers that suppport it via host-queuing hardware
38 (a software-only implementation could be a nightmare).
39
40 5) Investigate problems with PCI Message Signalled Interrupts (MSI).
41
42 6) Add port multiplier support (intermediate)
43
44 8) Develop a low-power-consumption strategy, and implement it.
45
46 9) [Experiment, low priority] See if ATAPI can be supported using
47 "unknown FIS" or "vendor-specific FIS" support, or something creative
48 like that.
49
50 10) [Experiment, low priority] Investigate interrupt coalescing.
51 Quite often, especially with PCI Message Signalled Interrupts (MSI),
52 the overhead reduced by interrupt mitigation is quite often not
53 worth the latency cost.
54
55 11) [Experiment, Marvell value added] Is it possible to use target
56 mode to cross-connect two Linux boxes with Marvell cards? If so,
57 creating LibATA target mode support would be very interesting.
58
59 Target mode, for those without docs, is the ability to directly
60 connect two SATA controllers.
61
62 */
63
64
65 #include <linux/kernel.h>
66 #include <linux/module.h>
67 #include <linux/pci.h>
68 #include <linux/init.h>
69 #include <linux/blkdev.h>
70 #include <linux/delay.h>
71 #include <linux/interrupt.h>
72 #include <linux/dmapool.h>
73 #include <linux/dma-mapping.h>
74 #include <linux/device.h>
75 #include <linux/platform_device.h>
76 #include <linux/ata_platform.h>
77 #include <scsi/scsi_host.h>
78 #include <scsi/scsi_cmnd.h>
79 #include <scsi/scsi_device.h>
80 #include <linux/libata.h>
81
82 #define DRV_NAME "sata_mv"
83 #define DRV_VERSION "1.20"
84
85 enum {
86 /* BAR's are enumerated in terms of pci_resource_start() terms */
87 MV_PRIMARY_BAR = 0, /* offset 0x10: memory space */
88 MV_IO_BAR = 2, /* offset 0x18: IO space */
89 MV_MISC_BAR = 3, /* offset 0x1c: FLASH, NVRAM, SRAM */
90
91 MV_MAJOR_REG_AREA_SZ = 0x10000, /* 64KB */
92 MV_MINOR_REG_AREA_SZ = 0x2000, /* 8KB */
93
94 MV_PCI_REG_BASE = 0,
95 MV_IRQ_COAL_REG_BASE = 0x18000, /* 6xxx part only */
96 MV_IRQ_COAL_CAUSE = (MV_IRQ_COAL_REG_BASE + 0x08),
97 MV_IRQ_COAL_CAUSE_LO = (MV_IRQ_COAL_REG_BASE + 0x88),
98 MV_IRQ_COAL_CAUSE_HI = (MV_IRQ_COAL_REG_BASE + 0x8c),
99 MV_IRQ_COAL_THRESHOLD = (MV_IRQ_COAL_REG_BASE + 0xcc),
100 MV_IRQ_COAL_TIME_THRESHOLD = (MV_IRQ_COAL_REG_BASE + 0xd0),
101
102 MV_SATAHC0_REG_BASE = 0x20000,
103 MV_FLASH_CTL = 0x1046c,
104 MV_GPIO_PORT_CTL = 0x104f0,
105 MV_RESET_CFG = 0x180d8,
106
107 MV_PCI_REG_SZ = MV_MAJOR_REG_AREA_SZ,
108 MV_SATAHC_REG_SZ = MV_MAJOR_REG_AREA_SZ,
109 MV_SATAHC_ARBTR_REG_SZ = MV_MINOR_REG_AREA_SZ, /* arbiter */
110 MV_PORT_REG_SZ = MV_MINOR_REG_AREA_SZ,
111
112 MV_MAX_Q_DEPTH = 32,
113 MV_MAX_Q_DEPTH_MASK = MV_MAX_Q_DEPTH - 1,
114
115 /* CRQB needs alignment on a 1KB boundary. Size == 1KB
116 * CRPB needs alignment on a 256B boundary. Size == 256B
117 * ePRD (SG) entries need alignment on a 16B boundary. Size == 16B
118 */
119 MV_CRQB_Q_SZ = (32 * MV_MAX_Q_DEPTH),
120 MV_CRPB_Q_SZ = (8 * MV_MAX_Q_DEPTH),
121 MV_MAX_SG_CT = 256,
122 MV_SG_TBL_SZ = (16 * MV_MAX_SG_CT),
123
124 MV_PORTS_PER_HC = 4,
125 /* == (port / MV_PORTS_PER_HC) to determine HC from 0-7 port */
126 MV_PORT_HC_SHIFT = 2,
127 /* == (port % MV_PORTS_PER_HC) to determine hard port from 0-7 port */
128 MV_PORT_MASK = 3,
129
130 /* Host Flags */
131 MV_FLAG_DUAL_HC = (1 << 30), /* two SATA Host Controllers */
132 MV_FLAG_IRQ_COALESCE = (1 << 29), /* IRQ coalescing capability */
133 /* SoC integrated controllers, no PCI interface */
134 MV_FLAG_SOC = (1 << 28),
135
136 MV_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
137 ATA_FLAG_MMIO | ATA_FLAG_NO_ATAPI |
138 ATA_FLAG_PIO_POLLING,
139 MV_6XXX_FLAGS = MV_FLAG_IRQ_COALESCE,
140
141 CRQB_FLAG_READ = (1 << 0),
142 CRQB_TAG_SHIFT = 1,
143 CRQB_IOID_SHIFT = 6, /* CRQB Gen-II/IIE IO Id shift */
144 CRQB_HOSTQ_SHIFT = 17, /* CRQB Gen-II/IIE HostQueTag shift */
145 CRQB_CMD_ADDR_SHIFT = 8,
146 CRQB_CMD_CS = (0x2 << 11),
147 CRQB_CMD_LAST = (1 << 15),
148
149 CRPB_FLAG_STATUS_SHIFT = 8,
150 CRPB_IOID_SHIFT_6 = 5, /* CRPB Gen-II IO Id shift */
151 CRPB_IOID_SHIFT_7 = 7, /* CRPB Gen-IIE IO Id shift */
152
153 EPRD_FLAG_END_OF_TBL = (1 << 31),
154
155 /* PCI interface registers */
156
157 PCI_COMMAND_OFS = 0xc00,
158
159 PCI_MAIN_CMD_STS_OFS = 0xd30,
160 STOP_PCI_MASTER = (1 << 2),
161 PCI_MASTER_EMPTY = (1 << 3),
162 GLOB_SFT_RST = (1 << 4),
163
164 MV_PCI_MODE = 0xd00,
165 MV_PCI_EXP_ROM_BAR_CTL = 0xd2c,
166 MV_PCI_DISC_TIMER = 0xd04,
167 MV_PCI_MSI_TRIGGER = 0xc38,
168 MV_PCI_SERR_MASK = 0xc28,
169 MV_PCI_XBAR_TMOUT = 0x1d04,
170 MV_PCI_ERR_LOW_ADDRESS = 0x1d40,
171 MV_PCI_ERR_HIGH_ADDRESS = 0x1d44,
172 MV_PCI_ERR_ATTRIBUTE = 0x1d48,
173 MV_PCI_ERR_COMMAND = 0x1d50,
174
175 PCI_IRQ_CAUSE_OFS = 0x1d58,
176 PCI_IRQ_MASK_OFS = 0x1d5c,
177 PCI_UNMASK_ALL_IRQS = 0x7fffff, /* bits 22-0 */
178
179 PCIE_IRQ_CAUSE_OFS = 0x1900,
180 PCIE_IRQ_MASK_OFS = 0x1910,
181 PCIE_UNMASK_ALL_IRQS = 0x40a, /* assorted bits */
182
183 HC_MAIN_IRQ_CAUSE_OFS = 0x1d60,
184 HC_MAIN_IRQ_MASK_OFS = 0x1d64,
185 HC_SOC_MAIN_IRQ_CAUSE_OFS = 0x20020,
186 HC_SOC_MAIN_IRQ_MASK_OFS = 0x20024,
187 PORT0_ERR = (1 << 0), /* shift by port # */
188 PORT0_DONE = (1 << 1), /* shift by port # */
189 HC0_IRQ_PEND = 0x1ff, /* bits 0-8 = HC0's ports */
190 HC_SHIFT = 9, /* bits 9-17 = HC1's ports */
191 PCI_ERR = (1 << 18),
192 TRAN_LO_DONE = (1 << 19), /* 6xxx: IRQ coalescing */
193 TRAN_HI_DONE = (1 << 20), /* 6xxx: IRQ coalescing */
194 PORTS_0_3_COAL_DONE = (1 << 8),
195 PORTS_4_7_COAL_DONE = (1 << 17),
196 PORTS_0_7_COAL_DONE = (1 << 21), /* 6xxx: IRQ coalescing */
197 GPIO_INT = (1 << 22),
198 SELF_INT = (1 << 23),
199 TWSI_INT = (1 << 24),
200 HC_MAIN_RSVD = (0x7f << 25), /* bits 31-25 */
201 HC_MAIN_RSVD_5 = (0x1fff << 19), /* bits 31-19 */
202 HC_MAIN_RSVD_SOC = (0x3fffffb << 6), /* bits 31-9, 7-6 */
203 HC_MAIN_MASKED_IRQS = (TRAN_LO_DONE | TRAN_HI_DONE |
204 PORTS_0_7_COAL_DONE | GPIO_INT | TWSI_INT |
205 HC_MAIN_RSVD),
206 HC_MAIN_MASKED_IRQS_5 = (PORTS_0_3_COAL_DONE | PORTS_4_7_COAL_DONE |
207 HC_MAIN_RSVD_5),
208 HC_MAIN_MASKED_IRQS_SOC = (PORTS_0_3_COAL_DONE | HC_MAIN_RSVD_SOC),
209
210 /* SATAHC registers */
211 HC_CFG_OFS = 0,
212
213 HC_IRQ_CAUSE_OFS = 0x14,
214 CRPB_DMA_DONE = (1 << 0), /* shift by port # */
215 HC_IRQ_COAL = (1 << 4), /* IRQ coalescing */
216 DEV_IRQ = (1 << 8), /* shift by port # */
217
218 /* Shadow block registers */
219 SHD_BLK_OFS = 0x100,
220 SHD_CTL_AST_OFS = 0x20, /* ofs from SHD_BLK_OFS */
221
222 /* SATA registers */
223 SATA_STATUS_OFS = 0x300, /* ctrl, err regs follow status */
224 SATA_ACTIVE_OFS = 0x350,
225 SATA_FIS_IRQ_CAUSE_OFS = 0x364,
226 PHY_MODE3 = 0x310,
227 PHY_MODE4 = 0x314,
228 PHY_MODE2 = 0x330,
229 MV5_PHY_MODE = 0x74,
230 MV5_LT_MODE = 0x30,
231 MV5_PHY_CTL = 0x0C,
232 SATA_INTERFACE_CTL = 0x050,
233
234 MV_M2_PREAMP_MASK = 0x7e0,
235
236 /* Port registers */
237 EDMA_CFG_OFS = 0,
238 EDMA_CFG_Q_DEPTH = 0x1f, /* max device queue depth */
239 EDMA_CFG_NCQ = (1 << 5), /* for R/W FPDMA queued */
240 EDMA_CFG_NCQ_GO_ON_ERR = (1 << 14), /* continue on error */
241 EDMA_CFG_RD_BRST_EXT = (1 << 11), /* read burst 512B */
242 EDMA_CFG_WR_BUFF_LEN = (1 << 13), /* write buffer 512B */
243
244 EDMA_ERR_IRQ_CAUSE_OFS = 0x8,
245 EDMA_ERR_IRQ_MASK_OFS = 0xc,
246 EDMA_ERR_D_PAR = (1 << 0), /* UDMA data parity err */
247 EDMA_ERR_PRD_PAR = (1 << 1), /* UDMA PRD parity err */
248 EDMA_ERR_DEV = (1 << 2), /* device error */
249 EDMA_ERR_DEV_DCON = (1 << 3), /* device disconnect */
250 EDMA_ERR_DEV_CON = (1 << 4), /* device connected */
251 EDMA_ERR_SERR = (1 << 5), /* SError bits [WBDST] raised */
252 EDMA_ERR_SELF_DIS = (1 << 7), /* Gen II/IIE self-disable */
253 EDMA_ERR_SELF_DIS_5 = (1 << 8), /* Gen I self-disable */
254 EDMA_ERR_BIST_ASYNC = (1 << 8), /* BIST FIS or Async Notify */
255 EDMA_ERR_TRANS_IRQ_7 = (1 << 8), /* Gen IIE transprt layer irq */
256 EDMA_ERR_CRQB_PAR = (1 << 9), /* CRQB parity error */
257 EDMA_ERR_CRPB_PAR = (1 << 10), /* CRPB parity error */
258 EDMA_ERR_INTRL_PAR = (1 << 11), /* internal parity error */
259 EDMA_ERR_IORDY = (1 << 12), /* IORdy timeout */
260
261 EDMA_ERR_LNK_CTRL_RX = (0xf << 13), /* link ctrl rx error */
262 EDMA_ERR_LNK_CTRL_RX_0 = (1 << 13), /* transient: CRC err */
263 EDMA_ERR_LNK_CTRL_RX_1 = (1 << 14), /* transient: FIFO err */
264 EDMA_ERR_LNK_CTRL_RX_2 = (1 << 15), /* fatal: caught SYNC */
265 EDMA_ERR_LNK_CTRL_RX_3 = (1 << 16), /* transient: FIS rx err */
266
267 EDMA_ERR_LNK_DATA_RX = (0xf << 17), /* link data rx error */
268
269 EDMA_ERR_LNK_CTRL_TX = (0x1f << 21), /* link ctrl tx error */
270 EDMA_ERR_LNK_CTRL_TX_0 = (1 << 21), /* transient: CRC err */
271 EDMA_ERR_LNK_CTRL_TX_1 = (1 << 22), /* transient: FIFO err */
272 EDMA_ERR_LNK_CTRL_TX_2 = (1 << 23), /* transient: caught SYNC */
273 EDMA_ERR_LNK_CTRL_TX_3 = (1 << 24), /* transient: caught DMAT */
274 EDMA_ERR_LNK_CTRL_TX_4 = (1 << 25), /* transient: FIS collision */
275
276 EDMA_ERR_LNK_DATA_TX = (0x1f << 26), /* link data tx error */
277
278 EDMA_ERR_TRANS_PROTO = (1 << 31), /* transport protocol error */
279 EDMA_ERR_OVERRUN_5 = (1 << 5),
280 EDMA_ERR_UNDERRUN_5 = (1 << 6),
281
282 EDMA_ERR_IRQ_TRANSIENT = EDMA_ERR_LNK_CTRL_RX_0 |
283 EDMA_ERR_LNK_CTRL_RX_1 |
284 EDMA_ERR_LNK_CTRL_RX_3 |
285 EDMA_ERR_LNK_CTRL_TX,
286
287 EDMA_EH_FREEZE = EDMA_ERR_D_PAR |
288 EDMA_ERR_PRD_PAR |
289 EDMA_ERR_DEV_DCON |
290 EDMA_ERR_DEV_CON |
291 EDMA_ERR_SERR |
292 EDMA_ERR_SELF_DIS |
293 EDMA_ERR_CRQB_PAR |
294 EDMA_ERR_CRPB_PAR |
295 EDMA_ERR_INTRL_PAR |
296 EDMA_ERR_IORDY |
297 EDMA_ERR_LNK_CTRL_RX_2 |
298 EDMA_ERR_LNK_DATA_RX |
299 EDMA_ERR_LNK_DATA_TX |
300 EDMA_ERR_TRANS_PROTO,
301 EDMA_EH_FREEZE_5 = EDMA_ERR_D_PAR |
302 EDMA_ERR_PRD_PAR |
303 EDMA_ERR_DEV_DCON |
304 EDMA_ERR_DEV_CON |
305 EDMA_ERR_OVERRUN_5 |
306 EDMA_ERR_UNDERRUN_5 |
307 EDMA_ERR_SELF_DIS_5 |
308 EDMA_ERR_CRQB_PAR |
309 EDMA_ERR_CRPB_PAR |
310 EDMA_ERR_INTRL_PAR |
311 EDMA_ERR_IORDY,
312
313 EDMA_REQ_Q_BASE_HI_OFS = 0x10,
314 EDMA_REQ_Q_IN_PTR_OFS = 0x14, /* also contains BASE_LO */
315
316 EDMA_REQ_Q_OUT_PTR_OFS = 0x18,
317 EDMA_REQ_Q_PTR_SHIFT = 5,
318
319 EDMA_RSP_Q_BASE_HI_OFS = 0x1c,
320 EDMA_RSP_Q_IN_PTR_OFS = 0x20,
321 EDMA_RSP_Q_OUT_PTR_OFS = 0x24, /* also contains BASE_LO */
322 EDMA_RSP_Q_PTR_SHIFT = 3,
323
324 EDMA_CMD_OFS = 0x28, /* EDMA command register */
325 EDMA_EN = (1 << 0), /* enable EDMA */
326 EDMA_DS = (1 << 1), /* disable EDMA; self-negated */
327 ATA_RST = (1 << 2), /* reset trans/link/phy */
328
329 EDMA_IORDY_TMOUT = 0x34,
330 EDMA_ARB_CFG = 0x38,
331
332 /* Host private flags (hp_flags) */
333 MV_HP_FLAG_MSI = (1 << 0),
334 MV_HP_ERRATA_50XXB0 = (1 << 1),
335 MV_HP_ERRATA_50XXB2 = (1 << 2),
336 MV_HP_ERRATA_60X1B2 = (1 << 3),
337 MV_HP_ERRATA_60X1C0 = (1 << 4),
338 MV_HP_ERRATA_XX42A0 = (1 << 5),
339 MV_HP_GEN_I = (1 << 6), /* Generation I: 50xx */
340 MV_HP_GEN_II = (1 << 7), /* Generation II: 60xx */
341 MV_HP_GEN_IIE = (1 << 8), /* Generation IIE: 6042/7042 */
342 MV_HP_PCIE = (1 << 9), /* PCIe bus/regs: 7042 */
343
344 /* Port private flags (pp_flags) */
345 MV_PP_FLAG_EDMA_EN = (1 << 0), /* is EDMA engine enabled? */
346 MV_PP_FLAG_NCQ_EN = (1 << 1), /* is EDMA set up for NCQ? */
347 MV_PP_FLAG_HAD_A_RESET = (1 << 2), /* 1st hard reset complete? */
348 };
349
350 #define IS_GEN_I(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_I)
351 #define IS_GEN_II(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_II)
352 #define IS_GEN_IIE(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_IIE)
353 #define HAS_PCI(host) (!((host)->ports[0]->flags & MV_FLAG_SOC))
354
355 enum {
356 /* DMA boundary 0xffff is required by the s/g splitting
357 * we need on /length/ in mv_fill-sg().
358 */
359 MV_DMA_BOUNDARY = 0xffffU,
360
361 /* mask of register bits containing lower 32 bits
362 * of EDMA request queue DMA address
363 */
364 EDMA_REQ_Q_BASE_LO_MASK = 0xfffffc00U,
365
366 /* ditto, for response queue */
367 EDMA_RSP_Q_BASE_LO_MASK = 0xffffff00U,
368 };
369
370 enum chip_type {
371 chip_504x,
372 chip_508x,
373 chip_5080,
374 chip_604x,
375 chip_608x,
376 chip_6042,
377 chip_7042,
378 chip_soc,
379 };
380
381 /* Command ReQuest Block: 32B */
382 struct mv_crqb {
383 __le32 sg_addr;
384 __le32 sg_addr_hi;
385 __le16 ctrl_flags;
386 __le16 ata_cmd[11];
387 };
388
389 struct mv_crqb_iie {
390 __le32 addr;
391 __le32 addr_hi;
392 __le32 flags;
393 __le32 len;
394 __le32 ata_cmd[4];
395 };
396
397 /* Command ResPonse Block: 8B */
398 struct mv_crpb {
399 __le16 id;
400 __le16 flags;
401 __le32 tmstmp;
402 };
403
404 /* EDMA Physical Region Descriptor (ePRD); A.K.A. SG */
405 struct mv_sg {
406 __le32 addr;
407 __le32 flags_size;
408 __le32 addr_hi;
409 __le32 reserved;
410 };
411
412 struct mv_port_priv {
413 struct mv_crqb *crqb;
414 dma_addr_t crqb_dma;
415 struct mv_crpb *crpb;
416 dma_addr_t crpb_dma;
417 struct mv_sg *sg_tbl[MV_MAX_Q_DEPTH];
418 dma_addr_t sg_tbl_dma[MV_MAX_Q_DEPTH];
419
420 unsigned int req_idx;
421 unsigned int resp_idx;
422
423 u32 pp_flags;
424 };
425
426 struct mv_port_signal {
427 u32 amps;
428 u32 pre;
429 };
430
431 struct mv_host_priv {
432 u32 hp_flags;
433 struct mv_port_signal signal[8];
434 const struct mv_hw_ops *ops;
435 int n_ports;
436 void __iomem *base;
437 void __iomem *main_cause_reg_addr;
438 void __iomem *main_mask_reg_addr;
439 u32 irq_cause_ofs;
440 u32 irq_mask_ofs;
441 u32 unmask_all_irqs;
442 /*
443 * These consistent DMA memory pools give us guaranteed
444 * alignment for hardware-accessed data structures,
445 * and less memory waste in accomplishing the alignment.
446 */
447 struct dma_pool *crqb_pool;
448 struct dma_pool *crpb_pool;
449 struct dma_pool *sg_tbl_pool;
450 };
451
452 struct mv_hw_ops {
453 void (*phy_errata)(struct mv_host_priv *hpriv, void __iomem *mmio,
454 unsigned int port);
455 void (*enable_leds)(struct mv_host_priv *hpriv, void __iomem *mmio);
456 void (*read_preamp)(struct mv_host_priv *hpriv, int idx,
457 void __iomem *mmio);
458 int (*reset_hc)(struct mv_host_priv *hpriv, void __iomem *mmio,
459 unsigned int n_hc);
460 void (*reset_flash)(struct mv_host_priv *hpriv, void __iomem *mmio);
461 void (*reset_bus)(struct ata_host *host, void __iomem *mmio);
462 };
463
464 static void mv_irq_clear(struct ata_port *ap);
465 static int mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val);
466 static int mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val);
467 static int mv5_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val);
468 static int mv5_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val);
469 static int mv_port_start(struct ata_port *ap);
470 static void mv_port_stop(struct ata_port *ap);
471 static void mv_qc_prep(struct ata_queued_cmd *qc);
472 static void mv_qc_prep_iie(struct ata_queued_cmd *qc);
473 static unsigned int mv_qc_issue(struct ata_queued_cmd *qc);
474 static void mv_error_handler(struct ata_port *ap);
475 static void mv_eh_freeze(struct ata_port *ap);
476 static void mv_eh_thaw(struct ata_port *ap);
477 static void mv6_dev_config(struct ata_device *dev);
478
479 static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
480 unsigned int port);
481 static void mv5_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio);
482 static void mv5_read_preamp(struct mv_host_priv *hpriv, int idx,
483 void __iomem *mmio);
484 static int mv5_reset_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
485 unsigned int n_hc);
486 static void mv5_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio);
487 static void mv5_reset_bus(struct ata_host *host, void __iomem *mmio);
488
489 static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
490 unsigned int port);
491 static void mv6_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio);
492 static void mv6_read_preamp(struct mv_host_priv *hpriv, int idx,
493 void __iomem *mmio);
494 static int mv6_reset_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
495 unsigned int n_hc);
496 static void mv6_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio);
497 static void mv_soc_enable_leds(struct mv_host_priv *hpriv,
498 void __iomem *mmio);
499 static void mv_soc_read_preamp(struct mv_host_priv *hpriv, int idx,
500 void __iomem *mmio);
501 static int mv_soc_reset_hc(struct mv_host_priv *hpriv,
502 void __iomem *mmio, unsigned int n_hc);
503 static void mv_soc_reset_flash(struct mv_host_priv *hpriv,
504 void __iomem *mmio);
505 static void mv_soc_reset_bus(struct ata_host *host, void __iomem *mmio);
506 static void mv_reset_pci_bus(struct ata_host *host, void __iomem *mmio);
507 static void mv_channel_reset(struct mv_host_priv *hpriv, void __iomem *mmio,
508 unsigned int port_no);
509 static void mv_edma_cfg(struct mv_port_priv *pp, struct mv_host_priv *hpriv,
510 void __iomem *port_mmio, int want_ncq);
511 static int __mv_stop_dma(struct ata_port *ap);
512
513 /* .sg_tablesize is (MV_MAX_SG_CT / 2) in the structures below
514 * because we have to allow room for worst case splitting of
515 * PRDs for 64K boundaries in mv_fill_sg().
516 */
517 static struct scsi_host_template mv5_sht = {
518 .module = THIS_MODULE,
519 .name = DRV_NAME,
520 .ioctl = ata_scsi_ioctl,
521 .queuecommand = ata_scsi_queuecmd,
522 .can_queue = ATA_DEF_QUEUE,
523 .this_id = ATA_SHT_THIS_ID,
524 .sg_tablesize = MV_MAX_SG_CT / 2,
525 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
526 .emulated = ATA_SHT_EMULATED,
527 .use_clustering = 1,
528 .proc_name = DRV_NAME,
529 .dma_boundary = MV_DMA_BOUNDARY,
530 .slave_configure = ata_scsi_slave_config,
531 .slave_destroy = ata_scsi_slave_destroy,
532 .bios_param = ata_std_bios_param,
533 };
534
535 static struct scsi_host_template mv6_sht = {
536 .module = THIS_MODULE,
537 .name = DRV_NAME,
538 .ioctl = ata_scsi_ioctl,
539 .queuecommand = ata_scsi_queuecmd,
540 .change_queue_depth = ata_scsi_change_queue_depth,
541 .can_queue = MV_MAX_Q_DEPTH - 1,
542 .this_id = ATA_SHT_THIS_ID,
543 .sg_tablesize = MV_MAX_SG_CT / 2,
544 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
545 .emulated = ATA_SHT_EMULATED,
546 .use_clustering = 1,
547 .proc_name = DRV_NAME,
548 .dma_boundary = MV_DMA_BOUNDARY,
549 .slave_configure = ata_scsi_slave_config,
550 .slave_destroy = ata_scsi_slave_destroy,
551 .bios_param = ata_std_bios_param,
552 };
553
554 static const struct ata_port_operations mv5_ops = {
555 .tf_load = ata_tf_load,
556 .tf_read = ata_tf_read,
557 .check_status = ata_check_status,
558 .exec_command = ata_exec_command,
559 .dev_select = ata_std_dev_select,
560
561 .cable_detect = ata_cable_sata,
562
563 .qc_prep = mv_qc_prep,
564 .qc_issue = mv_qc_issue,
565 .data_xfer = ata_data_xfer,
566
567 .irq_clear = mv_irq_clear,
568 .irq_on = ata_irq_on,
569
570 .error_handler = mv_error_handler,
571 .freeze = mv_eh_freeze,
572 .thaw = mv_eh_thaw,
573
574 .scr_read = mv5_scr_read,
575 .scr_write = mv5_scr_write,
576
577 .port_start = mv_port_start,
578 .port_stop = mv_port_stop,
579 };
580
581 static const struct ata_port_operations mv6_ops = {
582 .dev_config = mv6_dev_config,
583 .tf_load = ata_tf_load,
584 .tf_read = ata_tf_read,
585 .check_status = ata_check_status,
586 .exec_command = ata_exec_command,
587 .dev_select = ata_std_dev_select,
588
589 .cable_detect = ata_cable_sata,
590
591 .qc_prep = mv_qc_prep,
592 .qc_issue = mv_qc_issue,
593 .data_xfer = ata_data_xfer,
594
595 .irq_clear = mv_irq_clear,
596 .irq_on = ata_irq_on,
597
598 .error_handler = mv_error_handler,
599 .freeze = mv_eh_freeze,
600 .thaw = mv_eh_thaw,
601 .qc_defer = ata_std_qc_defer,
602
603 .scr_read = mv_scr_read,
604 .scr_write = mv_scr_write,
605
606 .port_start = mv_port_start,
607 .port_stop = mv_port_stop,
608 };
609
610 static const struct ata_port_operations mv_iie_ops = {
611 .tf_load = ata_tf_load,
612 .tf_read = ata_tf_read,
613 .check_status = ata_check_status,
614 .exec_command = ata_exec_command,
615 .dev_select = ata_std_dev_select,
616
617 .cable_detect = ata_cable_sata,
618
619 .qc_prep = mv_qc_prep_iie,
620 .qc_issue = mv_qc_issue,
621 .data_xfer = ata_data_xfer,
622
623 .irq_clear = mv_irq_clear,
624 .irq_on = ata_irq_on,
625
626 .error_handler = mv_error_handler,
627 .freeze = mv_eh_freeze,
628 .thaw = mv_eh_thaw,
629 .qc_defer = ata_std_qc_defer,
630
631 .scr_read = mv_scr_read,
632 .scr_write = mv_scr_write,
633
634 .port_start = mv_port_start,
635 .port_stop = mv_port_stop,
636 };
637
638 static const struct ata_port_info mv_port_info[] = {
639 { /* chip_504x */
640 .flags = MV_COMMON_FLAGS,
641 .pio_mask = 0x1f, /* pio0-4 */
642 .udma_mask = ATA_UDMA6,
643 .port_ops = &mv5_ops,
644 },
645 { /* chip_508x */
646 .flags = MV_COMMON_FLAGS | MV_FLAG_DUAL_HC,
647 .pio_mask = 0x1f, /* pio0-4 */
648 .udma_mask = ATA_UDMA6,
649 .port_ops = &mv5_ops,
650 },
651 { /* chip_5080 */
652 .flags = MV_COMMON_FLAGS | MV_FLAG_DUAL_HC,
653 .pio_mask = 0x1f, /* pio0-4 */
654 .udma_mask = ATA_UDMA6,
655 .port_ops = &mv5_ops,
656 },
657 { /* chip_604x */
658 .flags = MV_COMMON_FLAGS | MV_6XXX_FLAGS |
659 ATA_FLAG_NCQ,
660 .pio_mask = 0x1f, /* pio0-4 */
661 .udma_mask = ATA_UDMA6,
662 .port_ops = &mv6_ops,
663 },
664 { /* chip_608x */
665 .flags = MV_COMMON_FLAGS | MV_6XXX_FLAGS |
666 ATA_FLAG_NCQ | MV_FLAG_DUAL_HC,
667 .pio_mask = 0x1f, /* pio0-4 */
668 .udma_mask = ATA_UDMA6,
669 .port_ops = &mv6_ops,
670 },
671 { /* chip_6042 */
672 .flags = MV_COMMON_FLAGS | MV_6XXX_FLAGS |
673 ATA_FLAG_NCQ,
674 .pio_mask = 0x1f, /* pio0-4 */
675 .udma_mask = ATA_UDMA6,
676 .port_ops = &mv_iie_ops,
677 },
678 { /* chip_7042 */
679 .flags = MV_COMMON_FLAGS | MV_6XXX_FLAGS |
680 ATA_FLAG_NCQ,
681 .pio_mask = 0x1f, /* pio0-4 */
682 .udma_mask = ATA_UDMA6,
683 .port_ops = &mv_iie_ops,
684 },
685 { /* chip_soc */
686 .flags = MV_COMMON_FLAGS | MV_FLAG_SOC,
687 .pio_mask = 0x1f, /* pio0-4 */
688 .udma_mask = ATA_UDMA6,
689 .port_ops = &mv_iie_ops,
690 },
691 };
692
693 static const struct pci_device_id mv_pci_tbl[] = {
694 { PCI_VDEVICE(MARVELL, 0x5040), chip_504x },
695 { PCI_VDEVICE(MARVELL, 0x5041), chip_504x },
696 { PCI_VDEVICE(MARVELL, 0x5080), chip_5080 },
697 { PCI_VDEVICE(MARVELL, 0x5081), chip_508x },
698 /* RocketRAID 1740/174x have different identifiers */
699 { PCI_VDEVICE(TTI, 0x1740), chip_508x },
700 { PCI_VDEVICE(TTI, 0x1742), chip_508x },
701
702 { PCI_VDEVICE(MARVELL, 0x6040), chip_604x },
703 { PCI_VDEVICE(MARVELL, 0x6041), chip_604x },
704 { PCI_VDEVICE(MARVELL, 0x6042), chip_6042 },
705 { PCI_VDEVICE(MARVELL, 0x6080), chip_608x },
706 { PCI_VDEVICE(MARVELL, 0x6081), chip_608x },
707
708 { PCI_VDEVICE(ADAPTEC2, 0x0241), chip_604x },
709
710 /* Adaptec 1430SA */
711 { PCI_VDEVICE(ADAPTEC2, 0x0243), chip_7042 },
712
713 /* Marvell 7042 support */
714 { PCI_VDEVICE(MARVELL, 0x7042), chip_7042 },
715
716 /* Highpoint RocketRAID PCIe series */
717 { PCI_VDEVICE(TTI, 0x2300), chip_7042 },
718 { PCI_VDEVICE(TTI, 0x2310), chip_7042 },
719
720 { } /* terminate list */
721 };
722
723 static const struct mv_hw_ops mv5xxx_ops = {
724 .phy_errata = mv5_phy_errata,
725 .enable_leds = mv5_enable_leds,
726 .read_preamp = mv5_read_preamp,
727 .reset_hc = mv5_reset_hc,
728 .reset_flash = mv5_reset_flash,
729 .reset_bus = mv5_reset_bus,
730 };
731
732 static const struct mv_hw_ops mv6xxx_ops = {
733 .phy_errata = mv6_phy_errata,
734 .enable_leds = mv6_enable_leds,
735 .read_preamp = mv6_read_preamp,
736 .reset_hc = mv6_reset_hc,
737 .reset_flash = mv6_reset_flash,
738 .reset_bus = mv_reset_pci_bus,
739 };
740
741 static const struct mv_hw_ops mv_soc_ops = {
742 .phy_errata = mv6_phy_errata,
743 .enable_leds = mv_soc_enable_leds,
744 .read_preamp = mv_soc_read_preamp,
745 .reset_hc = mv_soc_reset_hc,
746 .reset_flash = mv_soc_reset_flash,
747 .reset_bus = mv_soc_reset_bus,
748 };
749
750 /*
751 * Functions
752 */
753
754 static inline void writelfl(unsigned long data, void __iomem *addr)
755 {
756 writel(data, addr);
757 (void) readl(addr); /* flush to avoid PCI posted write */
758 }
759
760 static inline void __iomem *mv_hc_base(void __iomem *base, unsigned int hc)
761 {
762 return (base + MV_SATAHC0_REG_BASE + (hc * MV_SATAHC_REG_SZ));
763 }
764
765 static inline unsigned int mv_hc_from_port(unsigned int port)
766 {
767 return port >> MV_PORT_HC_SHIFT;
768 }
769
770 static inline unsigned int mv_hardport_from_port(unsigned int port)
771 {
772 return port & MV_PORT_MASK;
773 }
774
775 static inline void __iomem *mv_hc_base_from_port(void __iomem *base,
776 unsigned int port)
777 {
778 return mv_hc_base(base, mv_hc_from_port(port));
779 }
780
781 static inline void __iomem *mv_port_base(void __iomem *base, unsigned int port)
782 {
783 return mv_hc_base_from_port(base, port) +
784 MV_SATAHC_ARBTR_REG_SZ +
785 (mv_hardport_from_port(port) * MV_PORT_REG_SZ);
786 }
787
788 static inline void __iomem *mv_host_base(struct ata_host *host)
789 {
790 struct mv_host_priv *hpriv = host->private_data;
791 return hpriv->base;
792 }
793
794 static inline void __iomem *mv_ap_base(struct ata_port *ap)
795 {
796 return mv_port_base(mv_host_base(ap->host), ap->port_no);
797 }
798
799 static inline int mv_get_hc_count(unsigned long port_flags)
800 {
801 return ((port_flags & MV_FLAG_DUAL_HC) ? 2 : 1);
802 }
803
804 static void mv_irq_clear(struct ata_port *ap)
805 {
806 }
807
808 static void mv_set_edma_ptrs(void __iomem *port_mmio,
809 struct mv_host_priv *hpriv,
810 struct mv_port_priv *pp)
811 {
812 u32 index;
813
814 /*
815 * initialize request queue
816 */
817 index = (pp->req_idx & MV_MAX_Q_DEPTH_MASK) << EDMA_REQ_Q_PTR_SHIFT;
818
819 WARN_ON(pp->crqb_dma & 0x3ff);
820 writel((pp->crqb_dma >> 16) >> 16, port_mmio + EDMA_REQ_Q_BASE_HI_OFS);
821 writelfl((pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK) | index,
822 port_mmio + EDMA_REQ_Q_IN_PTR_OFS);
823
824 if (hpriv->hp_flags & MV_HP_ERRATA_XX42A0)
825 writelfl((pp->crqb_dma & 0xffffffff) | index,
826 port_mmio + EDMA_REQ_Q_OUT_PTR_OFS);
827 else
828 writelfl(index, port_mmio + EDMA_REQ_Q_OUT_PTR_OFS);
829
830 /*
831 * initialize response queue
832 */
833 index = (pp->resp_idx & MV_MAX_Q_DEPTH_MASK) << EDMA_RSP_Q_PTR_SHIFT;
834
835 WARN_ON(pp->crpb_dma & 0xff);
836 writel((pp->crpb_dma >> 16) >> 16, port_mmio + EDMA_RSP_Q_BASE_HI_OFS);
837
838 if (hpriv->hp_flags & MV_HP_ERRATA_XX42A0)
839 writelfl((pp->crpb_dma & 0xffffffff) | index,
840 port_mmio + EDMA_RSP_Q_IN_PTR_OFS);
841 else
842 writelfl(index, port_mmio + EDMA_RSP_Q_IN_PTR_OFS);
843
844 writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) | index,
845 port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
846 }
847
848 /**
849 * mv_start_dma - Enable eDMA engine
850 * @base: port base address
851 * @pp: port private data
852 *
853 * Verify the local cache of the eDMA state is accurate with a
854 * WARN_ON.
855 *
856 * LOCKING:
857 * Inherited from caller.
858 */
859 static void mv_start_dma(struct ata_port *ap, void __iomem *port_mmio,
860 struct mv_port_priv *pp, u8 protocol)
861 {
862 int want_ncq = (protocol == ATA_PROT_NCQ);
863
864 if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
865 int using_ncq = ((pp->pp_flags & MV_PP_FLAG_NCQ_EN) != 0);
866 if (want_ncq != using_ncq)
867 __mv_stop_dma(ap);
868 }
869 if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN)) {
870 struct mv_host_priv *hpriv = ap->host->private_data;
871 int hard_port = mv_hardport_from_port(ap->port_no);
872 void __iomem *hc_mmio = mv_hc_base_from_port(
873 mv_host_base(ap->host), hard_port);
874 u32 hc_irq_cause, ipending;
875
876 /* clear EDMA event indicators, if any */
877 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
878
879 /* clear EDMA interrupt indicator, if any */
880 hc_irq_cause = readl(hc_mmio + HC_IRQ_CAUSE_OFS);
881 ipending = (DEV_IRQ << hard_port) |
882 (CRPB_DMA_DONE << hard_port);
883 if (hc_irq_cause & ipending) {
884 writelfl(hc_irq_cause & ~ipending,
885 hc_mmio + HC_IRQ_CAUSE_OFS);
886 }
887
888 mv_edma_cfg(pp, hpriv, port_mmio, want_ncq);
889
890 /* clear FIS IRQ Cause */
891 writelfl(0, port_mmio + SATA_FIS_IRQ_CAUSE_OFS);
892
893 mv_set_edma_ptrs(port_mmio, hpriv, pp);
894
895 writelfl(EDMA_EN, port_mmio + EDMA_CMD_OFS);
896 pp->pp_flags |= MV_PP_FLAG_EDMA_EN;
897 }
898 WARN_ON(!(EDMA_EN & readl(port_mmio + EDMA_CMD_OFS)));
899 }
900
901 /**
902 * __mv_stop_dma - Disable eDMA engine
903 * @ap: ATA channel to manipulate
904 *
905 * Verify the local cache of the eDMA state is accurate with a
906 * WARN_ON.
907 *
908 * LOCKING:
909 * Inherited from caller.
910 */
911 static int __mv_stop_dma(struct ata_port *ap)
912 {
913 void __iomem *port_mmio = mv_ap_base(ap);
914 struct mv_port_priv *pp = ap->private_data;
915 u32 reg;
916 int i, err = 0;
917
918 if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
919 /* Disable EDMA if active. The disable bit auto clears.
920 */
921 writelfl(EDMA_DS, port_mmio + EDMA_CMD_OFS);
922 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
923 } else {
924 WARN_ON(EDMA_EN & readl(port_mmio + EDMA_CMD_OFS));
925 }
926
927 /* now properly wait for the eDMA to stop */
928 for (i = 1000; i > 0; i--) {
929 reg = readl(port_mmio + EDMA_CMD_OFS);
930 if (!(reg & EDMA_EN))
931 break;
932
933 udelay(100);
934 }
935
936 if (reg & EDMA_EN) {
937 ata_port_printk(ap, KERN_ERR, "Unable to stop eDMA\n");
938 err = -EIO;
939 }
940
941 return err;
942 }
943
944 static int mv_stop_dma(struct ata_port *ap)
945 {
946 unsigned long flags;
947 int rc;
948
949 spin_lock_irqsave(&ap->host->lock, flags);
950 rc = __mv_stop_dma(ap);
951 spin_unlock_irqrestore(&ap->host->lock, flags);
952
953 return rc;
954 }
955
956 #ifdef ATA_DEBUG
957 static void mv_dump_mem(void __iomem *start, unsigned bytes)
958 {
959 int b, w;
960 for (b = 0; b < bytes; ) {
961 DPRINTK("%p: ", start + b);
962 for (w = 0; b < bytes && w < 4; w++) {
963 printk("%08x ", readl(start + b));
964 b += sizeof(u32);
965 }
966 printk("\n");
967 }
968 }
969 #endif
970
971 static void mv_dump_pci_cfg(struct pci_dev *pdev, unsigned bytes)
972 {
973 #ifdef ATA_DEBUG
974 int b, w;
975 u32 dw;
976 for (b = 0; b < bytes; ) {
977 DPRINTK("%02x: ", b);
978 for (w = 0; b < bytes && w < 4; w++) {
979 (void) pci_read_config_dword(pdev, b, &dw);
980 printk("%08x ", dw);
981 b += sizeof(u32);
982 }
983 printk("\n");
984 }
985 #endif
986 }
987 static void mv_dump_all_regs(void __iomem *mmio_base, int port,
988 struct pci_dev *pdev)
989 {
990 #ifdef ATA_DEBUG
991 void __iomem *hc_base = mv_hc_base(mmio_base,
992 port >> MV_PORT_HC_SHIFT);
993 void __iomem *port_base;
994 int start_port, num_ports, p, start_hc, num_hcs, hc;
995
996 if (0 > port) {
997 start_hc = start_port = 0;
998 num_ports = 8; /* shld be benign for 4 port devs */
999 num_hcs = 2;
1000 } else {
1001 start_hc = port >> MV_PORT_HC_SHIFT;
1002 start_port = port;
1003 num_ports = num_hcs = 1;
1004 }
1005 DPRINTK("All registers for port(s) %u-%u:\n", start_port,
1006 num_ports > 1 ? num_ports - 1 : start_port);
1007
1008 if (NULL != pdev) {
1009 DPRINTK("PCI config space regs:\n");
1010 mv_dump_pci_cfg(pdev, 0x68);
1011 }
1012 DPRINTK("PCI regs:\n");
1013 mv_dump_mem(mmio_base+0xc00, 0x3c);
1014 mv_dump_mem(mmio_base+0xd00, 0x34);
1015 mv_dump_mem(mmio_base+0xf00, 0x4);
1016 mv_dump_mem(mmio_base+0x1d00, 0x6c);
1017 for (hc = start_hc; hc < start_hc + num_hcs; hc++) {
1018 hc_base = mv_hc_base(mmio_base, hc);
1019 DPRINTK("HC regs (HC %i):\n", hc);
1020 mv_dump_mem(hc_base, 0x1c);
1021 }
1022 for (p = start_port; p < start_port + num_ports; p++) {
1023 port_base = mv_port_base(mmio_base, p);
1024 DPRINTK("EDMA regs (port %i):\n", p);
1025 mv_dump_mem(port_base, 0x54);
1026 DPRINTK("SATA regs (port %i):\n", p);
1027 mv_dump_mem(port_base+0x300, 0x60);
1028 }
1029 #endif
1030 }
1031
1032 static unsigned int mv_scr_offset(unsigned int sc_reg_in)
1033 {
1034 unsigned int ofs;
1035
1036 switch (sc_reg_in) {
1037 case SCR_STATUS:
1038 case SCR_CONTROL:
1039 case SCR_ERROR:
1040 ofs = SATA_STATUS_OFS + (sc_reg_in * sizeof(u32));
1041 break;
1042 case SCR_ACTIVE:
1043 ofs = SATA_ACTIVE_OFS; /* active is not with the others */
1044 break;
1045 default:
1046 ofs = 0xffffffffU;
1047 break;
1048 }
1049 return ofs;
1050 }
1051
1052 static int mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val)
1053 {
1054 unsigned int ofs = mv_scr_offset(sc_reg_in);
1055
1056 if (ofs != 0xffffffffU) {
1057 *val = readl(mv_ap_base(ap) + ofs);
1058 return 0;
1059 } else
1060 return -EINVAL;
1061 }
1062
1063 static int mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
1064 {
1065 unsigned int ofs = mv_scr_offset(sc_reg_in);
1066
1067 if (ofs != 0xffffffffU) {
1068 writelfl(val, mv_ap_base(ap) + ofs);
1069 return 0;
1070 } else
1071 return -EINVAL;
1072 }
1073
1074 static void mv6_dev_config(struct ata_device *adev)
1075 {
1076 /*
1077 * We don't have hob_nsect when doing NCQ commands on Gen-II.
1078 * See mv_qc_prep() for more info.
1079 */
1080 if (adev->flags & ATA_DFLAG_NCQ)
1081 if (adev->max_sectors > ATA_MAX_SECTORS)
1082 adev->max_sectors = ATA_MAX_SECTORS;
1083 }
1084
1085 static void mv_edma_cfg(struct mv_port_priv *pp, struct mv_host_priv *hpriv,
1086 void __iomem *port_mmio, int want_ncq)
1087 {
1088 u32 cfg;
1089
1090 /* set up non-NCQ EDMA configuration */
1091 cfg = EDMA_CFG_Q_DEPTH; /* always 0x1f for *all* chips */
1092
1093 if (IS_GEN_I(hpriv))
1094 cfg |= (1 << 8); /* enab config burst size mask */
1095
1096 else if (IS_GEN_II(hpriv))
1097 cfg |= EDMA_CFG_RD_BRST_EXT | EDMA_CFG_WR_BUFF_LEN;
1098
1099 else if (IS_GEN_IIE(hpriv)) {
1100 cfg |= (1 << 23); /* do not mask PM field in rx'd FIS */
1101 cfg |= (1 << 22); /* enab 4-entry host queue cache */
1102 cfg |= (1 << 18); /* enab early completion */
1103 cfg |= (1 << 17); /* enab cut-through (dis stor&forwrd) */
1104 }
1105
1106 if (want_ncq) {
1107 cfg |= EDMA_CFG_NCQ;
1108 pp->pp_flags |= MV_PP_FLAG_NCQ_EN;
1109 } else
1110 pp->pp_flags &= ~MV_PP_FLAG_NCQ_EN;
1111
1112 writelfl(cfg, port_mmio + EDMA_CFG_OFS);
1113 }
1114
1115 static void mv_port_free_dma_mem(struct ata_port *ap)
1116 {
1117 struct mv_host_priv *hpriv = ap->host->private_data;
1118 struct mv_port_priv *pp = ap->private_data;
1119 int tag;
1120
1121 if (pp->crqb) {
1122 dma_pool_free(hpriv->crqb_pool, pp->crqb, pp->crqb_dma);
1123 pp->crqb = NULL;
1124 }
1125 if (pp->crpb) {
1126 dma_pool_free(hpriv->crpb_pool, pp->crpb, pp->crpb_dma);
1127 pp->crpb = NULL;
1128 }
1129 /*
1130 * For GEN_I, there's no NCQ, so we have only a single sg_tbl.
1131 * For later hardware, we have one unique sg_tbl per NCQ tag.
1132 */
1133 for (tag = 0; tag < MV_MAX_Q_DEPTH; ++tag) {
1134 if (pp->sg_tbl[tag]) {
1135 if (tag == 0 || !IS_GEN_I(hpriv))
1136 dma_pool_free(hpriv->sg_tbl_pool,
1137 pp->sg_tbl[tag],
1138 pp->sg_tbl_dma[tag]);
1139 pp->sg_tbl[tag] = NULL;
1140 }
1141 }
1142 }
1143
1144 /**
1145 * mv_port_start - Port specific init/start routine.
1146 * @ap: ATA channel to manipulate
1147 *
1148 * Allocate and point to DMA memory, init port private memory,
1149 * zero indices.
1150 *
1151 * LOCKING:
1152 * Inherited from caller.
1153 */
1154 static int mv_port_start(struct ata_port *ap)
1155 {
1156 struct device *dev = ap->host->dev;
1157 struct mv_host_priv *hpriv = ap->host->private_data;
1158 struct mv_port_priv *pp;
1159 void __iomem *port_mmio = mv_ap_base(ap);
1160 unsigned long flags;
1161 int tag;
1162
1163 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1164 if (!pp)
1165 return -ENOMEM;
1166 ap->private_data = pp;
1167
1168 pp->crqb = dma_pool_alloc(hpriv->crqb_pool, GFP_KERNEL, &pp->crqb_dma);
1169 if (!pp->crqb)
1170 return -ENOMEM;
1171 memset(pp->crqb, 0, MV_CRQB_Q_SZ);
1172
1173 pp->crpb = dma_pool_alloc(hpriv->crpb_pool, GFP_KERNEL, &pp->crpb_dma);
1174 if (!pp->crpb)
1175 goto out_port_free_dma_mem;
1176 memset(pp->crpb, 0, MV_CRPB_Q_SZ);
1177
1178 /*
1179 * For GEN_I, there's no NCQ, so we only allocate a single sg_tbl.
1180 * For later hardware, we need one unique sg_tbl per NCQ tag.
1181 */
1182 for (tag = 0; tag < MV_MAX_Q_DEPTH; ++tag) {
1183 if (tag == 0 || !IS_GEN_I(hpriv)) {
1184 pp->sg_tbl[tag] = dma_pool_alloc(hpriv->sg_tbl_pool,
1185 GFP_KERNEL, &pp->sg_tbl_dma[tag]);
1186 if (!pp->sg_tbl[tag])
1187 goto out_port_free_dma_mem;
1188 } else {
1189 pp->sg_tbl[tag] = pp->sg_tbl[0];
1190 pp->sg_tbl_dma[tag] = pp->sg_tbl_dma[0];
1191 }
1192 }
1193
1194 spin_lock_irqsave(&ap->host->lock, flags);
1195
1196 mv_edma_cfg(pp, hpriv, port_mmio, 0);
1197 mv_set_edma_ptrs(port_mmio, hpriv, pp);
1198
1199 spin_unlock_irqrestore(&ap->host->lock, flags);
1200
1201 /* Don't turn on EDMA here...do it before DMA commands only. Else
1202 * we'll be unable to send non-data, PIO, etc due to restricted access
1203 * to shadow regs.
1204 */
1205 return 0;
1206
1207 out_port_free_dma_mem:
1208 mv_port_free_dma_mem(ap);
1209 return -ENOMEM;
1210 }
1211
1212 /**
1213 * mv_port_stop - Port specific cleanup/stop routine.
1214 * @ap: ATA channel to manipulate
1215 *
1216 * Stop DMA, cleanup port memory.
1217 *
1218 * LOCKING:
1219 * This routine uses the host lock to protect the DMA stop.
1220 */
1221 static void mv_port_stop(struct ata_port *ap)
1222 {
1223 mv_stop_dma(ap);
1224 mv_port_free_dma_mem(ap);
1225 }
1226
1227 /**
1228 * mv_fill_sg - Fill out the Marvell ePRD (scatter gather) entries
1229 * @qc: queued command whose SG list to source from
1230 *
1231 * Populate the SG list and mark the last entry.
1232 *
1233 * LOCKING:
1234 * Inherited from caller.
1235 */
1236 static void mv_fill_sg(struct ata_queued_cmd *qc)
1237 {
1238 struct mv_port_priv *pp = qc->ap->private_data;
1239 struct scatterlist *sg;
1240 struct mv_sg *mv_sg, *last_sg = NULL;
1241 unsigned int si;
1242
1243 mv_sg = pp->sg_tbl[qc->tag];
1244 for_each_sg(qc->sg, sg, qc->n_elem, si) {
1245 dma_addr_t addr = sg_dma_address(sg);
1246 u32 sg_len = sg_dma_len(sg);
1247
1248 while (sg_len) {
1249 u32 offset = addr & 0xffff;
1250 u32 len = sg_len;
1251
1252 if ((offset + sg_len > 0x10000))
1253 len = 0x10000 - offset;
1254
1255 mv_sg->addr = cpu_to_le32(addr & 0xffffffff);
1256 mv_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
1257 mv_sg->flags_size = cpu_to_le32(len & 0xffff);
1258
1259 sg_len -= len;
1260 addr += len;
1261
1262 last_sg = mv_sg;
1263 mv_sg++;
1264 }
1265 }
1266
1267 if (likely(last_sg))
1268 last_sg->flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL);
1269 }
1270
1271 static void mv_crqb_pack_cmd(__le16 *cmdw, u8 data, u8 addr, unsigned last)
1272 {
1273 u16 tmp = data | (addr << CRQB_CMD_ADDR_SHIFT) | CRQB_CMD_CS |
1274 (last ? CRQB_CMD_LAST : 0);
1275 *cmdw = cpu_to_le16(tmp);
1276 }
1277
1278 /**
1279 * mv_qc_prep - Host specific command preparation.
1280 * @qc: queued command to prepare
1281 *
1282 * This routine simply redirects to the general purpose routine
1283 * if command is not DMA. Else, it handles prep of the CRQB
1284 * (command request block), does some sanity checking, and calls
1285 * the SG load routine.
1286 *
1287 * LOCKING:
1288 * Inherited from caller.
1289 */
1290 static void mv_qc_prep(struct ata_queued_cmd *qc)
1291 {
1292 struct ata_port *ap = qc->ap;
1293 struct mv_port_priv *pp = ap->private_data;
1294 __le16 *cw;
1295 struct ata_taskfile *tf;
1296 u16 flags = 0;
1297 unsigned in_index;
1298
1299 if ((qc->tf.protocol != ATA_PROT_DMA) &&
1300 (qc->tf.protocol != ATA_PROT_NCQ))
1301 return;
1302
1303 /* Fill in command request block
1304 */
1305 if (!(qc->tf.flags & ATA_TFLAG_WRITE))
1306 flags |= CRQB_FLAG_READ;
1307 WARN_ON(MV_MAX_Q_DEPTH <= qc->tag);
1308 flags |= qc->tag << CRQB_TAG_SHIFT;
1309
1310 /* get current queue index from software */
1311 in_index = pp->req_idx & MV_MAX_Q_DEPTH_MASK;
1312
1313 pp->crqb[in_index].sg_addr =
1314 cpu_to_le32(pp->sg_tbl_dma[qc->tag] & 0xffffffff);
1315 pp->crqb[in_index].sg_addr_hi =
1316 cpu_to_le32((pp->sg_tbl_dma[qc->tag] >> 16) >> 16);
1317 pp->crqb[in_index].ctrl_flags = cpu_to_le16(flags);
1318
1319 cw = &pp->crqb[in_index].ata_cmd[0];
1320 tf = &qc->tf;
1321
1322 /* Sadly, the CRQB cannot accomodate all registers--there are
1323 * only 11 bytes...so we must pick and choose required
1324 * registers based on the command. So, we drop feature and
1325 * hob_feature for [RW] DMA commands, but they are needed for
1326 * NCQ. NCQ will drop hob_nsect.
1327 */
1328 switch (tf->command) {
1329 case ATA_CMD_READ:
1330 case ATA_CMD_READ_EXT:
1331 case ATA_CMD_WRITE:
1332 case ATA_CMD_WRITE_EXT:
1333 case ATA_CMD_WRITE_FUA_EXT:
1334 mv_crqb_pack_cmd(cw++, tf->hob_nsect, ATA_REG_NSECT, 0);
1335 break;
1336 case ATA_CMD_FPDMA_READ:
1337 case ATA_CMD_FPDMA_WRITE:
1338 mv_crqb_pack_cmd(cw++, tf->hob_feature, ATA_REG_FEATURE, 0);
1339 mv_crqb_pack_cmd(cw++, tf->feature, ATA_REG_FEATURE, 0);
1340 break;
1341 default:
1342 /* The only other commands EDMA supports in non-queued and
1343 * non-NCQ mode are: [RW] STREAM DMA and W DMA FUA EXT, none
1344 * of which are defined/used by Linux. If we get here, this
1345 * driver needs work.
1346 *
1347 * FIXME: modify libata to give qc_prep a return value and
1348 * return error here.
1349 */
1350 BUG_ON(tf->command);
1351 break;
1352 }
1353 mv_crqb_pack_cmd(cw++, tf->nsect, ATA_REG_NSECT, 0);
1354 mv_crqb_pack_cmd(cw++, tf->hob_lbal, ATA_REG_LBAL, 0);
1355 mv_crqb_pack_cmd(cw++, tf->lbal, ATA_REG_LBAL, 0);
1356 mv_crqb_pack_cmd(cw++, tf->hob_lbam, ATA_REG_LBAM, 0);
1357 mv_crqb_pack_cmd(cw++, tf->lbam, ATA_REG_LBAM, 0);
1358 mv_crqb_pack_cmd(cw++, tf->hob_lbah, ATA_REG_LBAH, 0);
1359 mv_crqb_pack_cmd(cw++, tf->lbah, ATA_REG_LBAH, 0);
1360 mv_crqb_pack_cmd(cw++, tf->device, ATA_REG_DEVICE, 0);
1361 mv_crqb_pack_cmd(cw++, tf->command, ATA_REG_CMD, 1); /* last */
1362
1363 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
1364 return;
1365 mv_fill_sg(qc);
1366 }
1367
1368 /**
1369 * mv_qc_prep_iie - Host specific command preparation.
1370 * @qc: queued command to prepare
1371 *
1372 * This routine simply redirects to the general purpose routine
1373 * if command is not DMA. Else, it handles prep of the CRQB
1374 * (command request block), does some sanity checking, and calls
1375 * the SG load routine.
1376 *
1377 * LOCKING:
1378 * Inherited from caller.
1379 */
1380 static void mv_qc_prep_iie(struct ata_queued_cmd *qc)
1381 {
1382 struct ata_port *ap = qc->ap;
1383 struct mv_port_priv *pp = ap->private_data;
1384 struct mv_crqb_iie *crqb;
1385 struct ata_taskfile *tf;
1386 unsigned in_index;
1387 u32 flags = 0;
1388
1389 if ((qc->tf.protocol != ATA_PROT_DMA) &&
1390 (qc->tf.protocol != ATA_PROT_NCQ))
1391 return;
1392
1393 /* Fill in Gen IIE command request block
1394 */
1395 if (!(qc->tf.flags & ATA_TFLAG_WRITE))
1396 flags |= CRQB_FLAG_READ;
1397
1398 WARN_ON(MV_MAX_Q_DEPTH <= qc->tag);
1399 flags |= qc->tag << CRQB_TAG_SHIFT;
1400 flags |= qc->tag << CRQB_HOSTQ_SHIFT;
1401
1402 /* get current queue index from software */
1403 in_index = pp->req_idx & MV_MAX_Q_DEPTH_MASK;
1404
1405 crqb = (struct mv_crqb_iie *) &pp->crqb[in_index];
1406 crqb->addr = cpu_to_le32(pp->sg_tbl_dma[qc->tag] & 0xffffffff);
1407 crqb->addr_hi = cpu_to_le32((pp->sg_tbl_dma[qc->tag] >> 16) >> 16);
1408 crqb->flags = cpu_to_le32(flags);
1409
1410 tf = &qc->tf;
1411 crqb->ata_cmd[0] = cpu_to_le32(
1412 (tf->command << 16) |
1413 (tf->feature << 24)
1414 );
1415 crqb->ata_cmd[1] = cpu_to_le32(
1416 (tf->lbal << 0) |
1417 (tf->lbam << 8) |
1418 (tf->lbah << 16) |
1419 (tf->device << 24)
1420 );
1421 crqb->ata_cmd[2] = cpu_to_le32(
1422 (tf->hob_lbal << 0) |
1423 (tf->hob_lbam << 8) |
1424 (tf->hob_lbah << 16) |
1425 (tf->hob_feature << 24)
1426 );
1427 crqb->ata_cmd[3] = cpu_to_le32(
1428 (tf->nsect << 0) |
1429 (tf->hob_nsect << 8)
1430 );
1431
1432 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
1433 return;
1434 mv_fill_sg(qc);
1435 }
1436
1437 /**
1438 * mv_qc_issue - Initiate a command to the host
1439 * @qc: queued command to start
1440 *
1441 * This routine simply redirects to the general purpose routine
1442 * if command is not DMA. Else, it sanity checks our local
1443 * caches of the request producer/consumer indices then enables
1444 * DMA and bumps the request producer index.
1445 *
1446 * LOCKING:
1447 * Inherited from caller.
1448 */
1449 static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
1450 {
1451 struct ata_port *ap = qc->ap;
1452 void __iomem *port_mmio = mv_ap_base(ap);
1453 struct mv_port_priv *pp = ap->private_data;
1454 u32 in_index;
1455
1456 if ((qc->tf.protocol != ATA_PROT_DMA) &&
1457 (qc->tf.protocol != ATA_PROT_NCQ)) {
1458 /* We're about to send a non-EDMA capable command to the
1459 * port. Turn off EDMA so there won't be problems accessing
1460 * shadow block, etc registers.
1461 */
1462 __mv_stop_dma(ap);
1463 return ata_qc_issue_prot(qc);
1464 }
1465
1466 mv_start_dma(ap, port_mmio, pp, qc->tf.protocol);
1467
1468 pp->req_idx++;
1469
1470 in_index = (pp->req_idx & MV_MAX_Q_DEPTH_MASK) << EDMA_REQ_Q_PTR_SHIFT;
1471
1472 /* and write the request in pointer to kick the EDMA to life */
1473 writelfl((pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK) | in_index,
1474 port_mmio + EDMA_REQ_Q_IN_PTR_OFS);
1475
1476 return 0;
1477 }
1478
1479 /**
1480 * mv_err_intr - Handle error interrupts on the port
1481 * @ap: ATA channel to manipulate
1482 * @reset_allowed: bool: 0 == don't trigger from reset here
1483 *
1484 * In most cases, just clear the interrupt and move on. However,
1485 * some cases require an eDMA reset, which is done right before
1486 * the COMRESET in mv_phy_reset(). The SERR case requires a
1487 * clear of pending errors in the SATA SERROR register. Finally,
1488 * if the port disabled DMA, update our cached copy to match.
1489 *
1490 * LOCKING:
1491 * Inherited from caller.
1492 */
1493 static void mv_err_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
1494 {
1495 void __iomem *port_mmio = mv_ap_base(ap);
1496 u32 edma_err_cause, eh_freeze_mask, serr = 0;
1497 struct mv_port_priv *pp = ap->private_data;
1498 struct mv_host_priv *hpriv = ap->host->private_data;
1499 unsigned int edma_enabled = (pp->pp_flags & MV_PP_FLAG_EDMA_EN);
1500 unsigned int action = 0, err_mask = 0;
1501 struct ata_eh_info *ehi = &ap->link.eh_info;
1502
1503 ata_ehi_clear_desc(ehi);
1504
1505 if (!edma_enabled) {
1506 /* just a guess: do we need to do this? should we
1507 * expand this, and do it in all cases?
1508 */
1509 sata_scr_read(&ap->link, SCR_ERROR, &serr);
1510 sata_scr_write_flush(&ap->link, SCR_ERROR, serr);
1511 }
1512
1513 edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
1514
1515 ata_ehi_push_desc(ehi, "edma_err 0x%08x", edma_err_cause);
1516
1517 /*
1518 * all generations share these EDMA error cause bits
1519 */
1520
1521 if (edma_err_cause & EDMA_ERR_DEV)
1522 err_mask |= AC_ERR_DEV;
1523 if (edma_err_cause & (EDMA_ERR_D_PAR | EDMA_ERR_PRD_PAR |
1524 EDMA_ERR_CRQB_PAR | EDMA_ERR_CRPB_PAR |
1525 EDMA_ERR_INTRL_PAR)) {
1526 err_mask |= AC_ERR_ATA_BUS;
1527 action |= ATA_EH_HARDRESET;
1528 ata_ehi_push_desc(ehi, "parity error");
1529 }
1530 if (edma_err_cause & (EDMA_ERR_DEV_DCON | EDMA_ERR_DEV_CON)) {
1531 ata_ehi_hotplugged(ehi);
1532 ata_ehi_push_desc(ehi, edma_err_cause & EDMA_ERR_DEV_DCON ?
1533 "dev disconnect" : "dev connect");
1534 action |= ATA_EH_HARDRESET;
1535 }
1536
1537 if (IS_GEN_I(hpriv)) {
1538 eh_freeze_mask = EDMA_EH_FREEZE_5;
1539
1540 if (edma_err_cause & EDMA_ERR_SELF_DIS_5) {
1541 pp = ap->private_data;
1542 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
1543 ata_ehi_push_desc(ehi, "EDMA self-disable");
1544 }
1545 } else {
1546 eh_freeze_mask = EDMA_EH_FREEZE;
1547
1548 if (edma_err_cause & EDMA_ERR_SELF_DIS) {
1549 pp = ap->private_data;
1550 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
1551 ata_ehi_push_desc(ehi, "EDMA self-disable");
1552 }
1553
1554 if (edma_err_cause & EDMA_ERR_SERR) {
1555 sata_scr_read(&ap->link, SCR_ERROR, &serr);
1556 sata_scr_write_flush(&ap->link, SCR_ERROR, serr);
1557 err_mask = AC_ERR_ATA_BUS;
1558 action |= ATA_EH_HARDRESET;
1559 }
1560 }
1561
1562 /* Clear EDMA now that SERR cleanup done */
1563 writelfl(~edma_err_cause, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
1564
1565 if (!err_mask) {
1566 err_mask = AC_ERR_OTHER;
1567 action |= ATA_EH_HARDRESET;
1568 }
1569
1570 ehi->serror |= serr;
1571 ehi->action |= action;
1572
1573 if (qc)
1574 qc->err_mask |= err_mask;
1575 else
1576 ehi->err_mask |= err_mask;
1577
1578 if (edma_err_cause & eh_freeze_mask)
1579 ata_port_freeze(ap);
1580 else
1581 ata_port_abort(ap);
1582 }
1583
1584 static void mv_intr_pio(struct ata_port *ap)
1585 {
1586 struct ata_queued_cmd *qc;
1587 u8 ata_status;
1588
1589 /* ignore spurious intr if drive still BUSY */
1590 ata_status = readb(ap->ioaddr.status_addr);
1591 if (unlikely(ata_status & ATA_BUSY))
1592 return;
1593
1594 /* get active ATA command */
1595 qc = ata_qc_from_tag(ap, ap->link.active_tag);
1596 if (unlikely(!qc)) /* no active tag */
1597 return;
1598 if (qc->tf.flags & ATA_TFLAG_POLLING) /* polling; we don't own qc */
1599 return;
1600
1601 /* and finally, complete the ATA command */
1602 qc->err_mask |= ac_err_mask(ata_status);
1603 ata_qc_complete(qc);
1604 }
1605
1606 static void mv_intr_edma(struct ata_port *ap)
1607 {
1608 void __iomem *port_mmio = mv_ap_base(ap);
1609 struct mv_host_priv *hpriv = ap->host->private_data;
1610 struct mv_port_priv *pp = ap->private_data;
1611 struct ata_queued_cmd *qc;
1612 u32 out_index, in_index;
1613 bool work_done = false;
1614
1615 /* get h/w response queue pointer */
1616 in_index = (readl(port_mmio + EDMA_RSP_Q_IN_PTR_OFS)
1617 >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK;
1618
1619 while (1) {
1620 u16 status;
1621 unsigned int tag;
1622
1623 /* get s/w response queue last-read pointer, and compare */
1624 out_index = pp->resp_idx & MV_MAX_Q_DEPTH_MASK;
1625 if (in_index == out_index)
1626 break;
1627
1628 /* 50xx: get active ATA command */
1629 if (IS_GEN_I(hpriv))
1630 tag = ap->link.active_tag;
1631
1632 /* Gen II/IIE: get active ATA command via tag, to enable
1633 * support for queueing. this works transparently for
1634 * queued and non-queued modes.
1635 */
1636 else
1637 tag = le16_to_cpu(pp->crpb[out_index].id) & 0x1f;
1638
1639 qc = ata_qc_from_tag(ap, tag);
1640
1641 /* For non-NCQ mode, the lower 8 bits of status
1642 * are from EDMA_ERR_IRQ_CAUSE_OFS,
1643 * which should be zero if all went well.
1644 */
1645 status = le16_to_cpu(pp->crpb[out_index].flags);
1646 if ((status & 0xff) && !(pp->pp_flags & MV_PP_FLAG_NCQ_EN)) {
1647 mv_err_intr(ap, qc);
1648 return;
1649 }
1650
1651 /* and finally, complete the ATA command */
1652 if (qc) {
1653 qc->err_mask |=
1654 ac_err_mask(status >> CRPB_FLAG_STATUS_SHIFT);
1655 ata_qc_complete(qc);
1656 }
1657
1658 /* advance software response queue pointer, to
1659 * indicate (after the loop completes) to hardware
1660 * that we have consumed a response queue entry.
1661 */
1662 work_done = true;
1663 pp->resp_idx++;
1664 }
1665
1666 if (work_done)
1667 writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) |
1668 (out_index << EDMA_RSP_Q_PTR_SHIFT),
1669 port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
1670 }
1671
1672 /**
1673 * mv_host_intr - Handle all interrupts on the given host controller
1674 * @host: host specific structure
1675 * @relevant: port error bits relevant to this host controller
1676 * @hc: which host controller we're to look at
1677 *
1678 * Read then write clear the HC interrupt status then walk each
1679 * port connected to the HC and see if it needs servicing. Port
1680 * success ints are reported in the HC interrupt status reg, the
1681 * port error ints are reported in the higher level main
1682 * interrupt status register and thus are passed in via the
1683 * 'relevant' argument.
1684 *
1685 * LOCKING:
1686 * Inherited from caller.
1687 */
1688 static void mv_host_intr(struct ata_host *host, u32 relevant, unsigned int hc)
1689 {
1690 struct mv_host_priv *hpriv = host->private_data;
1691 void __iomem *mmio = hpriv->base;
1692 void __iomem *hc_mmio = mv_hc_base(mmio, hc);
1693 u32 hc_irq_cause;
1694 int port, port0, last_port;
1695
1696 if (hc == 0)
1697 port0 = 0;
1698 else
1699 port0 = MV_PORTS_PER_HC;
1700
1701 if (HAS_PCI(host))
1702 last_port = port0 + MV_PORTS_PER_HC;
1703 else
1704 last_port = port0 + hpriv->n_ports;
1705 /* we'll need the HC success int register in most cases */
1706 hc_irq_cause = readl(hc_mmio + HC_IRQ_CAUSE_OFS);
1707 if (!hc_irq_cause)
1708 return;
1709
1710 writelfl(~hc_irq_cause, hc_mmio + HC_IRQ_CAUSE_OFS);
1711
1712 VPRINTK("ENTER, hc%u relevant=0x%08x HC IRQ cause=0x%08x\n",
1713 hc, relevant, hc_irq_cause);
1714
1715 for (port = port0; port < last_port; port++) {
1716 struct ata_port *ap = host->ports[port];
1717 struct mv_port_priv *pp;
1718 int have_err_bits, hard_port, shift;
1719
1720 if ((!ap) || (ap->flags & ATA_FLAG_DISABLED))
1721 continue;
1722
1723 pp = ap->private_data;
1724
1725 shift = port << 1; /* (port * 2) */
1726 if (port >= MV_PORTS_PER_HC) {
1727 shift++; /* skip bit 8 in the HC Main IRQ reg */
1728 }
1729 have_err_bits = ((PORT0_ERR << shift) & relevant);
1730
1731 if (unlikely(have_err_bits)) {
1732 struct ata_queued_cmd *qc;
1733
1734 qc = ata_qc_from_tag(ap, ap->link.active_tag);
1735 if (qc && (qc->tf.flags & ATA_TFLAG_POLLING))
1736 continue;
1737
1738 mv_err_intr(ap, qc);
1739 continue;
1740 }
1741
1742 hard_port = mv_hardport_from_port(port); /* range 0..3 */
1743
1744 if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
1745 if ((CRPB_DMA_DONE << hard_port) & hc_irq_cause)
1746 mv_intr_edma(ap);
1747 } else {
1748 if ((DEV_IRQ << hard_port) & hc_irq_cause)
1749 mv_intr_pio(ap);
1750 }
1751 }
1752 VPRINTK("EXIT\n");
1753 }
1754
1755 static void mv_pci_error(struct ata_host *host, void __iomem *mmio)
1756 {
1757 struct mv_host_priv *hpriv = host->private_data;
1758 struct ata_port *ap;
1759 struct ata_queued_cmd *qc;
1760 struct ata_eh_info *ehi;
1761 unsigned int i, err_mask, printed = 0;
1762 u32 err_cause;
1763
1764 err_cause = readl(mmio + hpriv->irq_cause_ofs);
1765
1766 dev_printk(KERN_ERR, host->dev, "PCI ERROR; PCI IRQ cause=0x%08x\n",
1767 err_cause);
1768
1769 DPRINTK("All regs @ PCI error\n");
1770 mv_dump_all_regs(mmio, -1, to_pci_dev(host->dev));
1771
1772 writelfl(0, mmio + hpriv->irq_cause_ofs);
1773
1774 for (i = 0; i < host->n_ports; i++) {
1775 ap = host->ports[i];
1776 if (!ata_link_offline(&ap->link)) {
1777 ehi = &ap->link.eh_info;
1778 ata_ehi_clear_desc(ehi);
1779 if (!printed++)
1780 ata_ehi_push_desc(ehi,
1781 "PCI err cause 0x%08x", err_cause);
1782 err_mask = AC_ERR_HOST_BUS;
1783 ehi->action = ATA_EH_HARDRESET;
1784 qc = ata_qc_from_tag(ap, ap->link.active_tag);
1785 if (qc)
1786 qc->err_mask |= err_mask;
1787 else
1788 ehi->err_mask |= err_mask;
1789
1790 ata_port_freeze(ap);
1791 }
1792 }
1793 }
1794
1795 /**
1796 * mv_interrupt - Main interrupt event handler
1797 * @irq: unused
1798 * @dev_instance: private data; in this case the host structure
1799 *
1800 * Read the read only register to determine if any host
1801 * controllers have pending interrupts. If so, call lower level
1802 * routine to handle. Also check for PCI errors which are only
1803 * reported here.
1804 *
1805 * LOCKING:
1806 * This routine holds the host lock while processing pending
1807 * interrupts.
1808 */
1809 static irqreturn_t mv_interrupt(int irq, void *dev_instance)
1810 {
1811 struct ata_host *host = dev_instance;
1812 struct mv_host_priv *hpriv = host->private_data;
1813 unsigned int hc, handled = 0, n_hcs;
1814 void __iomem *mmio = hpriv->base;
1815 u32 irq_stat, irq_mask;
1816
1817 spin_lock(&host->lock);
1818
1819 irq_stat = readl(hpriv->main_cause_reg_addr);
1820 irq_mask = readl(hpriv->main_mask_reg_addr);
1821
1822 /* check the cases where we either have nothing pending or have read
1823 * a bogus register value which can indicate HW removal or PCI fault
1824 */
1825 if (!(irq_stat & irq_mask) || (0xffffffffU == irq_stat))
1826 goto out_unlock;
1827
1828 n_hcs = mv_get_hc_count(host->ports[0]->flags);
1829
1830 if (unlikely((irq_stat & PCI_ERR) && HAS_PCI(host))) {
1831 mv_pci_error(host, mmio);
1832 handled = 1;
1833 goto out_unlock; /* skip all other HC irq handling */
1834 }
1835
1836 for (hc = 0; hc < n_hcs; hc++) {
1837 u32 relevant = irq_stat & (HC0_IRQ_PEND << (hc * HC_SHIFT));
1838 if (relevant) {
1839 mv_host_intr(host, relevant, hc);
1840 handled = 1;
1841 }
1842 }
1843
1844 out_unlock:
1845 spin_unlock(&host->lock);
1846
1847 return IRQ_RETVAL(handled);
1848 }
1849
1850 static void __iomem *mv5_phy_base(void __iomem *mmio, unsigned int port)
1851 {
1852 void __iomem *hc_mmio = mv_hc_base_from_port(mmio, port);
1853 unsigned long ofs = (mv_hardport_from_port(port) + 1) * 0x100UL;
1854
1855 return hc_mmio + ofs;
1856 }
1857
1858 static unsigned int mv5_scr_offset(unsigned int sc_reg_in)
1859 {
1860 unsigned int ofs;
1861
1862 switch (sc_reg_in) {
1863 case SCR_STATUS:
1864 case SCR_ERROR:
1865 case SCR_CONTROL:
1866 ofs = sc_reg_in * sizeof(u32);
1867 break;
1868 default:
1869 ofs = 0xffffffffU;
1870 break;
1871 }
1872 return ofs;
1873 }
1874
1875 static int mv5_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val)
1876 {
1877 struct mv_host_priv *hpriv = ap->host->private_data;
1878 void __iomem *mmio = hpriv->base;
1879 void __iomem *addr = mv5_phy_base(mmio, ap->port_no);
1880 unsigned int ofs = mv5_scr_offset(sc_reg_in);
1881
1882 if (ofs != 0xffffffffU) {
1883 *val = readl(addr + ofs);
1884 return 0;
1885 } else
1886 return -EINVAL;
1887 }
1888
1889 static int mv5_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
1890 {
1891 struct mv_host_priv *hpriv = ap->host->private_data;
1892 void __iomem *mmio = hpriv->base;
1893 void __iomem *addr = mv5_phy_base(mmio, ap->port_no);
1894 unsigned int ofs = mv5_scr_offset(sc_reg_in);
1895
1896 if (ofs != 0xffffffffU) {
1897 writelfl(val, addr + ofs);
1898 return 0;
1899 } else
1900 return -EINVAL;
1901 }
1902
1903 static void mv5_reset_bus(struct ata_host *host, void __iomem *mmio)
1904 {
1905 struct pci_dev *pdev = to_pci_dev(host->dev);
1906 int early_5080;
1907
1908 early_5080 = (pdev->device == 0x5080) && (pdev->revision == 0);
1909
1910 if (!early_5080) {
1911 u32 tmp = readl(mmio + MV_PCI_EXP_ROM_BAR_CTL);
1912 tmp |= (1 << 0);
1913 writel(tmp, mmio + MV_PCI_EXP_ROM_BAR_CTL);
1914 }
1915
1916 mv_reset_pci_bus(host, mmio);
1917 }
1918
1919 static void mv5_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio)
1920 {
1921 writel(0x0fcfffff, mmio + MV_FLASH_CTL);
1922 }
1923
1924 static void mv5_read_preamp(struct mv_host_priv *hpriv, int idx,
1925 void __iomem *mmio)
1926 {
1927 void __iomem *phy_mmio = mv5_phy_base(mmio, idx);
1928 u32 tmp;
1929
1930 tmp = readl(phy_mmio + MV5_PHY_MODE);
1931
1932 hpriv->signal[idx].pre = tmp & 0x1800; /* bits 12:11 */
1933 hpriv->signal[idx].amps = tmp & 0xe0; /* bits 7:5 */
1934 }
1935
1936 static void mv5_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio)
1937 {
1938 u32 tmp;
1939
1940 writel(0, mmio + MV_GPIO_PORT_CTL);
1941
1942 /* FIXME: handle MV_HP_ERRATA_50XXB2 errata */
1943
1944 tmp = readl(mmio + MV_PCI_EXP_ROM_BAR_CTL);
1945 tmp |= ~(1 << 0);
1946 writel(tmp, mmio + MV_PCI_EXP_ROM_BAR_CTL);
1947 }
1948
1949 static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
1950 unsigned int port)
1951 {
1952 void __iomem *phy_mmio = mv5_phy_base(mmio, port);
1953 const u32 mask = (1<<12) | (1<<11) | (1<<7) | (1<<6) | (1<<5);
1954 u32 tmp;
1955 int fix_apm_sq = (hpriv->hp_flags & MV_HP_ERRATA_50XXB0);
1956
1957 if (fix_apm_sq) {
1958 tmp = readl(phy_mmio + MV5_LT_MODE);
1959 tmp |= (1 << 19);
1960 writel(tmp, phy_mmio + MV5_LT_MODE);
1961
1962 tmp = readl(phy_mmio + MV5_PHY_CTL);
1963 tmp &= ~0x3;
1964 tmp |= 0x1;
1965 writel(tmp, phy_mmio + MV5_PHY_CTL);
1966 }
1967
1968 tmp = readl(phy_mmio + MV5_PHY_MODE);
1969 tmp &= ~mask;
1970 tmp |= hpriv->signal[port].pre;
1971 tmp |= hpriv->signal[port].amps;
1972 writel(tmp, phy_mmio + MV5_PHY_MODE);
1973 }
1974
1975
1976 #undef ZERO
1977 #define ZERO(reg) writel(0, port_mmio + (reg))
1978 static void mv5_reset_hc_port(struct mv_host_priv *hpriv, void __iomem *mmio,
1979 unsigned int port)
1980 {
1981 void __iomem *port_mmio = mv_port_base(mmio, port);
1982
1983 writelfl(EDMA_DS, port_mmio + EDMA_CMD_OFS);
1984
1985 mv_channel_reset(hpriv, mmio, port);
1986
1987 ZERO(0x028); /* command */
1988 writel(0x11f, port_mmio + EDMA_CFG_OFS);
1989 ZERO(0x004); /* timer */
1990 ZERO(0x008); /* irq err cause */
1991 ZERO(0x00c); /* irq err mask */
1992 ZERO(0x010); /* rq bah */
1993 ZERO(0x014); /* rq inp */
1994 ZERO(0x018); /* rq outp */
1995 ZERO(0x01c); /* respq bah */
1996 ZERO(0x024); /* respq outp */
1997 ZERO(0x020); /* respq inp */
1998 ZERO(0x02c); /* test control */
1999 writel(0xbc, port_mmio + EDMA_IORDY_TMOUT);
2000 }
2001 #undef ZERO
2002
2003 #define ZERO(reg) writel(0, hc_mmio + (reg))
2004 static void mv5_reset_one_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
2005 unsigned int hc)
2006 {
2007 void __iomem *hc_mmio = mv_hc_base(mmio, hc);
2008 u32 tmp;
2009
2010 ZERO(0x00c);
2011 ZERO(0x010);
2012 ZERO(0x014);
2013 ZERO(0x018);
2014
2015 tmp = readl(hc_mmio + 0x20);
2016 tmp &= 0x1c1c1c1c;
2017 tmp |= 0x03030303;
2018 writel(tmp, hc_mmio + 0x20);
2019 }
2020 #undef ZERO
2021
2022 static int mv5_reset_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
2023 unsigned int n_hc)
2024 {
2025 unsigned int hc, port;
2026
2027 for (hc = 0; hc < n_hc; hc++) {
2028 for (port = 0; port < MV_PORTS_PER_HC; port++)
2029 mv5_reset_hc_port(hpriv, mmio,
2030 (hc * MV_PORTS_PER_HC) + port);
2031
2032 mv5_reset_one_hc(hpriv, mmio, hc);
2033 }
2034
2035 return 0;
2036 }
2037
2038 #undef ZERO
2039 #define ZERO(reg) writel(0, mmio + (reg))
2040 static void mv_reset_pci_bus(struct ata_host *host, void __iomem *mmio)
2041 {
2042 struct mv_host_priv *hpriv = host->private_data;
2043 u32 tmp;
2044
2045 tmp = readl(mmio + MV_PCI_MODE);
2046 tmp &= 0xff00ffff;
2047 writel(tmp, mmio + MV_PCI_MODE);
2048
2049 ZERO(MV_PCI_DISC_TIMER);
2050 ZERO(MV_PCI_MSI_TRIGGER);
2051 writel(0x000100ff, mmio + MV_PCI_XBAR_TMOUT);
2052 ZERO(HC_MAIN_IRQ_MASK_OFS);
2053 ZERO(MV_PCI_SERR_MASK);
2054 ZERO(hpriv->irq_cause_ofs);
2055 ZERO(hpriv->irq_mask_ofs);
2056 ZERO(MV_PCI_ERR_LOW_ADDRESS);
2057 ZERO(MV_PCI_ERR_HIGH_ADDRESS);
2058 ZERO(MV_PCI_ERR_ATTRIBUTE);
2059 ZERO(MV_PCI_ERR_COMMAND);
2060 }
2061 #undef ZERO
2062
2063 static void mv6_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio)
2064 {
2065 u32 tmp;
2066
2067 mv5_reset_flash(hpriv, mmio);
2068
2069 tmp = readl(mmio + MV_GPIO_PORT_CTL);
2070 tmp &= 0x3;
2071 tmp |= (1 << 5) | (1 << 6);
2072 writel(tmp, mmio + MV_GPIO_PORT_CTL);
2073 }
2074
2075 /**
2076 * mv6_reset_hc - Perform the 6xxx global soft reset
2077 * @mmio: base address of the HBA
2078 *
2079 * This routine only applies to 6xxx parts.
2080 *
2081 * LOCKING:
2082 * Inherited from caller.
2083 */
2084 static int mv6_reset_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
2085 unsigned int n_hc)
2086 {
2087 void __iomem *reg = mmio + PCI_MAIN_CMD_STS_OFS;
2088 int i, rc = 0;
2089 u32 t;
2090
2091 /* Following procedure defined in PCI "main command and status
2092 * register" table.
2093 */
2094 t = readl(reg);
2095 writel(t | STOP_PCI_MASTER, reg);
2096
2097 for (i = 0; i < 1000; i++) {
2098 udelay(1);
2099 t = readl(reg);
2100 if (PCI_MASTER_EMPTY & t)
2101 break;
2102 }
2103 if (!(PCI_MASTER_EMPTY & t)) {
2104 printk(KERN_ERR DRV_NAME ": PCI master won't flush\n");
2105 rc = 1;
2106 goto done;
2107 }
2108
2109 /* set reset */
2110 i = 5;
2111 do {
2112 writel(t | GLOB_SFT_RST, reg);
2113 t = readl(reg);
2114 udelay(1);
2115 } while (!(GLOB_SFT_RST & t) && (i-- > 0));
2116
2117 if (!(GLOB_SFT_RST & t)) {
2118 printk(KERN_ERR DRV_NAME ": can't set global reset\n");
2119 rc = 1;
2120 goto done;
2121 }
2122
2123 /* clear reset and *reenable the PCI master* (not mentioned in spec) */
2124 i = 5;
2125 do {
2126 writel(t & ~(GLOB_SFT_RST | STOP_PCI_MASTER), reg);
2127 t = readl(reg);
2128 udelay(1);
2129 } while ((GLOB_SFT_RST & t) && (i-- > 0));
2130
2131 if (GLOB_SFT_RST & t) {
2132 printk(KERN_ERR DRV_NAME ": can't clear global reset\n");
2133 rc = 1;
2134 }
2135 done:
2136 return rc;
2137 }
2138
2139 static void mv6_read_preamp(struct mv_host_priv *hpriv, int idx,
2140 void __iomem *mmio)
2141 {
2142 void __iomem *port_mmio;
2143 u32 tmp;
2144
2145 tmp = readl(mmio + MV_RESET_CFG);
2146 if ((tmp & (1 << 0)) == 0) {
2147 hpriv->signal[idx].amps = 0x7 << 8;
2148 hpriv->signal[idx].pre = 0x1 << 5;
2149 return;
2150 }
2151
2152 port_mmio = mv_port_base(mmio, idx);
2153 tmp = readl(port_mmio + PHY_MODE2);
2154
2155 hpriv->signal[idx].amps = tmp & 0x700; /* bits 10:8 */
2156 hpriv->signal[idx].pre = tmp & 0xe0; /* bits 7:5 */
2157 }
2158
2159 static void mv6_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio)
2160 {
2161 writel(0x00000060, mmio + MV_GPIO_PORT_CTL);
2162 }
2163
2164 static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
2165 unsigned int port)
2166 {
2167 void __iomem *port_mmio = mv_port_base(mmio, port);
2168
2169 u32 hp_flags = hpriv->hp_flags;
2170 int fix_phy_mode2 =
2171 hp_flags & (MV_HP_ERRATA_60X1B2 | MV_HP_ERRATA_60X1C0);
2172 int fix_phy_mode4 =
2173 hp_flags & (MV_HP_ERRATA_60X1B2 | MV_HP_ERRATA_60X1C0);
2174 u32 m2, tmp;
2175
2176 if (fix_phy_mode2) {
2177 m2 = readl(port_mmio + PHY_MODE2);
2178 m2 &= ~(1 << 16);
2179 m2 |= (1 << 31);
2180 writel(m2, port_mmio + PHY_MODE2);
2181
2182 udelay(200);
2183
2184 m2 = readl(port_mmio + PHY_MODE2);
2185 m2 &= ~((1 << 16) | (1 << 31));
2186 writel(m2, port_mmio + PHY_MODE2);
2187
2188 udelay(200);
2189 }
2190
2191 /* who knows what this magic does */
2192 tmp = readl(port_mmio + PHY_MODE3);
2193 tmp &= ~0x7F800000;
2194 tmp |= 0x2A800000;
2195 writel(tmp, port_mmio + PHY_MODE3);
2196
2197 if (fix_phy_mode4) {
2198 u32 m4;
2199
2200 m4 = readl(port_mmio + PHY_MODE4);
2201
2202 if (hp_flags & MV_HP_ERRATA_60X1B2)
2203 tmp = readl(port_mmio + 0x310);
2204
2205 m4 = (m4 & ~(1 << 1)) | (1 << 0);
2206
2207 writel(m4, port_mmio + PHY_MODE4);
2208
2209 if (hp_flags & MV_HP_ERRATA_60X1B2)
2210 writel(tmp, port_mmio + 0x310);
2211 }
2212
2213 /* Revert values of pre-emphasis and signal amps to the saved ones */
2214 m2 = readl(port_mmio + PHY_MODE2);
2215
2216 m2 &= ~MV_M2_PREAMP_MASK;
2217 m2 |= hpriv->signal[port].amps;
2218 m2 |= hpriv->signal[port].pre;
2219 m2 &= ~(1 << 16);
2220
2221 /* according to mvSata 3.6.1, some IIE values are fixed */
2222 if (IS_GEN_IIE(hpriv)) {
2223 m2 &= ~0xC30FF01F;
2224 m2 |= 0x0000900F;
2225 }
2226
2227 writel(m2, port_mmio + PHY_MODE2);
2228 }
2229
2230 /* TODO: use the generic LED interface to configure the SATA Presence */
2231 /* & Acitivy LEDs on the board */
2232 static void mv_soc_enable_leds(struct mv_host_priv *hpriv,
2233 void __iomem *mmio)
2234 {
2235 return;
2236 }
2237
2238 static void mv_soc_read_preamp(struct mv_host_priv *hpriv, int idx,
2239 void __iomem *mmio)
2240 {
2241 void __iomem *port_mmio;
2242 u32 tmp;
2243
2244 port_mmio = mv_port_base(mmio, idx);
2245 tmp = readl(port_mmio + PHY_MODE2);
2246
2247 hpriv->signal[idx].amps = tmp & 0x700; /* bits 10:8 */
2248 hpriv->signal[idx].pre = tmp & 0xe0; /* bits 7:5 */
2249 }
2250
2251 #undef ZERO
2252 #define ZERO(reg) writel(0, port_mmio + (reg))
2253 static void mv_soc_reset_hc_port(struct mv_host_priv *hpriv,
2254 void __iomem *mmio, unsigned int port)
2255 {
2256 void __iomem *port_mmio = mv_port_base(mmio, port);
2257
2258 writelfl(EDMA_DS, port_mmio + EDMA_CMD_OFS);
2259
2260 mv_channel_reset(hpriv, mmio, port);
2261
2262 ZERO(0x028); /* command */
2263 writel(0x101f, port_mmio + EDMA_CFG_OFS);
2264 ZERO(0x004); /* timer */
2265 ZERO(0x008); /* irq err cause */
2266 ZERO(0x00c); /* irq err mask */
2267 ZERO(0x010); /* rq bah */
2268 ZERO(0x014); /* rq inp */
2269 ZERO(0x018); /* rq outp */
2270 ZERO(0x01c); /* respq bah */
2271 ZERO(0x024); /* respq outp */
2272 ZERO(0x020); /* respq inp */
2273 ZERO(0x02c); /* test control */
2274 writel(0xbc, port_mmio + EDMA_IORDY_TMOUT);
2275 }
2276
2277 #undef ZERO
2278
2279 #define ZERO(reg) writel(0, hc_mmio + (reg))
2280 static void mv_soc_reset_one_hc(struct mv_host_priv *hpriv,
2281 void __iomem *mmio)
2282 {
2283 void __iomem *hc_mmio = mv_hc_base(mmio, 0);
2284
2285 ZERO(0x00c);
2286 ZERO(0x010);
2287 ZERO(0x014);
2288
2289 }
2290
2291 #undef ZERO
2292
2293 static int mv_soc_reset_hc(struct mv_host_priv *hpriv,
2294 void __iomem *mmio, unsigned int n_hc)
2295 {
2296 unsigned int port;
2297
2298 for (port = 0; port < hpriv->n_ports; port++)
2299 mv_soc_reset_hc_port(hpriv, mmio, port);
2300
2301 mv_soc_reset_one_hc(hpriv, mmio);
2302
2303 return 0;
2304 }
2305
2306 static void mv_soc_reset_flash(struct mv_host_priv *hpriv,
2307 void __iomem *mmio)
2308 {
2309 return;
2310 }
2311
2312 static void mv_soc_reset_bus(struct ata_host *host, void __iomem *mmio)
2313 {
2314 return;
2315 }
2316
2317 static void mv_channel_reset(struct mv_host_priv *hpriv, void __iomem *mmio,
2318 unsigned int port_no)
2319 {
2320 void __iomem *port_mmio = mv_port_base(mmio, port_no);
2321
2322 writelfl(ATA_RST, port_mmio + EDMA_CMD_OFS);
2323
2324 if (IS_GEN_II(hpriv)) {
2325 u32 ifctl = readl(port_mmio + SATA_INTERFACE_CTL);
2326 ifctl |= (1 << 7); /* enable gen2i speed */
2327 ifctl = (ifctl & 0xfff) | 0x9b1000; /* from chip spec */
2328 writelfl(ifctl, port_mmio + SATA_INTERFACE_CTL);
2329 }
2330
2331 udelay(25); /* allow reset propagation */
2332
2333 /* Spec never mentions clearing the bit. Marvell's driver does
2334 * clear the bit, however.
2335 */
2336 writelfl(0, port_mmio + EDMA_CMD_OFS);
2337
2338 hpriv->ops->phy_errata(hpriv, mmio, port_no);
2339
2340 if (IS_GEN_I(hpriv))
2341 mdelay(1);
2342 }
2343
2344 /**
2345 * mv_phy_reset - Perform eDMA reset followed by COMRESET
2346 * @ap: ATA channel to manipulate
2347 *
2348 * Part of this is taken from __sata_phy_reset and modified to
2349 * not sleep since this routine gets called from interrupt level.
2350 *
2351 * LOCKING:
2352 * Inherited from caller. This is coded to safe to call at
2353 * interrupt level, i.e. it does not sleep.
2354 */
2355 static void mv_phy_reset(struct ata_port *ap, unsigned int *class,
2356 unsigned long deadline)
2357 {
2358 struct mv_port_priv *pp = ap->private_data;
2359 struct mv_host_priv *hpriv = ap->host->private_data;
2360 void __iomem *port_mmio = mv_ap_base(ap);
2361 int retry = 5;
2362 u32 sstatus;
2363
2364 VPRINTK("ENTER, port %u, mmio 0x%p\n", ap->port_no, port_mmio);
2365
2366 #ifdef DEBUG
2367 {
2368 u32 sstatus, serror, scontrol;
2369
2370 mv_scr_read(ap, SCR_STATUS, &sstatus);
2371 mv_scr_read(ap, SCR_ERROR, &serror);
2372 mv_scr_read(ap, SCR_CONTROL, &scontrol);
2373 DPRINTK("S-regs after ATA_RST: SStat 0x%08x SErr 0x%08x "
2374 "SCtrl 0x%08x\n", sstatus, serror, scontrol);
2375 }
2376 #endif
2377
2378 /* Issue COMRESET via SControl */
2379 comreset_retry:
2380 sata_scr_write_flush(&ap->link, SCR_CONTROL, 0x301);
2381 msleep(1);
2382
2383 sata_scr_write_flush(&ap->link, SCR_CONTROL, 0x300);
2384 msleep(20);
2385
2386 do {
2387 sata_scr_read(&ap->link, SCR_STATUS, &sstatus);
2388 if (((sstatus & 0x3) == 3) || ((sstatus & 0x3) == 0))
2389 break;
2390
2391 msleep(1);
2392 } while (time_before(jiffies, deadline));
2393
2394 /* work around errata */
2395 if (IS_GEN_II(hpriv) &&
2396 (sstatus != 0x0) && (sstatus != 0x113) && (sstatus != 0x123) &&
2397 (retry-- > 0))
2398 goto comreset_retry;
2399
2400 #ifdef DEBUG
2401 {
2402 u32 sstatus, serror, scontrol;
2403
2404 mv_scr_read(ap, SCR_STATUS, &sstatus);
2405 mv_scr_read(ap, SCR_ERROR, &serror);
2406 mv_scr_read(ap, SCR_CONTROL, &scontrol);
2407 DPRINTK("S-regs after PHY wake: SStat 0x%08x SErr 0x%08x "
2408 "SCtrl 0x%08x\n", sstatus, serror, scontrol);
2409 }
2410 #endif
2411
2412 if (ata_link_offline(&ap->link)) {
2413 *class = ATA_DEV_NONE;
2414 return;
2415 }
2416
2417 /* even after SStatus reflects that device is ready,
2418 * it seems to take a while for link to be fully
2419 * established (and thus Status no longer 0x80/0x7F),
2420 * so we poll a bit for that, here.
2421 */
2422 retry = 20;
2423 while (1) {
2424 u8 drv_stat = ata_check_status(ap);
2425 if ((drv_stat != 0x80) && (drv_stat != 0x7f))
2426 break;
2427 msleep(500);
2428 if (retry-- <= 0)
2429 break;
2430 if (time_after(jiffies, deadline))
2431 break;
2432 }
2433
2434 /* FIXME: if we passed the deadline, the following
2435 * code probably produces an invalid result
2436 */
2437
2438 /* finally, read device signature from TF registers */
2439 *class = ata_dev_try_classify(ap->link.device, 1, NULL);
2440
2441 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
2442
2443 WARN_ON(pp->pp_flags & MV_PP_FLAG_EDMA_EN);
2444
2445 VPRINTK("EXIT\n");
2446 }
2447
2448 static int mv_prereset(struct ata_link *link, unsigned long deadline)
2449 {
2450 struct ata_port *ap = link->ap;
2451 struct mv_port_priv *pp = ap->private_data;
2452 struct ata_eh_context *ehc = &link->eh_context;
2453 int rc;
2454
2455 rc = mv_stop_dma(ap);
2456 if (rc)
2457 ehc->i.action |= ATA_EH_HARDRESET;
2458
2459 if (!(pp->pp_flags & MV_PP_FLAG_HAD_A_RESET)) {
2460 pp->pp_flags |= MV_PP_FLAG_HAD_A_RESET;
2461 ehc->i.action |= ATA_EH_HARDRESET;
2462 }
2463
2464 /* if we're about to do hardreset, nothing more to do */
2465 if (ehc->i.action & ATA_EH_HARDRESET)
2466 return 0;
2467
2468 if (ata_link_online(link))
2469 rc = ata_wait_ready(ap, deadline);
2470 else
2471 rc = -ENODEV;
2472
2473 return rc;
2474 }
2475
2476 static int mv_hardreset(struct ata_link *link, unsigned int *class,
2477 unsigned long deadline)
2478 {
2479 struct ata_port *ap = link->ap;
2480 struct mv_host_priv *hpriv = ap->host->private_data;
2481 void __iomem *mmio = hpriv->base;
2482
2483 mv_stop_dma(ap);
2484
2485 mv_channel_reset(hpriv, mmio, ap->port_no);
2486
2487 mv_phy_reset(ap, class, deadline);
2488
2489 return 0;
2490 }
2491
2492 static void mv_postreset(struct ata_link *link, unsigned int *classes)
2493 {
2494 struct ata_port *ap = link->ap;
2495 u32 serr;
2496
2497 /* print link status */
2498 sata_print_link_status(link);
2499
2500 /* clear SError */
2501 sata_scr_read(link, SCR_ERROR, &serr);
2502 sata_scr_write_flush(link, SCR_ERROR, serr);
2503
2504 /* bail out if no device is present */
2505 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
2506 DPRINTK("EXIT, no device\n");
2507 return;
2508 }
2509
2510 /* set up device control */
2511 iowrite8(ap->ctl, ap->ioaddr.ctl_addr);
2512 }
2513
2514 static void mv_error_handler(struct ata_port *ap)
2515 {
2516 ata_do_eh(ap, mv_prereset, ata_std_softreset,
2517 mv_hardreset, mv_postreset);
2518 }
2519
2520 static void mv_eh_freeze(struct ata_port *ap)
2521 {
2522 struct mv_host_priv *hpriv = ap->host->private_data;
2523 unsigned int hc = (ap->port_no > 3) ? 1 : 0;
2524 u32 tmp, mask;
2525 unsigned int shift;
2526
2527 /* FIXME: handle coalescing completion events properly */
2528
2529 shift = ap->port_no * 2;
2530 if (hc > 0)
2531 shift++;
2532
2533 mask = 0x3 << shift;
2534
2535 /* disable assertion of portN err, done events */
2536 tmp = readl(hpriv->main_mask_reg_addr);
2537 writelfl(tmp & ~mask, hpriv->main_mask_reg_addr);
2538 }
2539
2540 static void mv_eh_thaw(struct ata_port *ap)
2541 {
2542 struct mv_host_priv *hpriv = ap->host->private_data;
2543 void __iomem *mmio = hpriv->base;
2544 unsigned int hc = (ap->port_no > 3) ? 1 : 0;
2545 void __iomem *hc_mmio = mv_hc_base(mmio, hc);
2546 void __iomem *port_mmio = mv_ap_base(ap);
2547 u32 tmp, mask, hc_irq_cause;
2548 unsigned int shift, hc_port_no = ap->port_no;
2549
2550 /* FIXME: handle coalescing completion events properly */
2551
2552 shift = ap->port_no * 2;
2553 if (hc > 0) {
2554 shift++;
2555 hc_port_no -= 4;
2556 }
2557
2558 mask = 0x3 << shift;
2559
2560 /* clear EDMA errors on this port */
2561 writel(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
2562
2563 /* clear pending irq events */
2564 hc_irq_cause = readl(hc_mmio + HC_IRQ_CAUSE_OFS);
2565 hc_irq_cause &= ~(1 << hc_port_no); /* clear CRPB-done */
2566 hc_irq_cause &= ~(1 << (hc_port_no + 8)); /* clear Device int */
2567 writel(hc_irq_cause, hc_mmio + HC_IRQ_CAUSE_OFS);
2568
2569 /* enable assertion of portN err, done events */
2570 tmp = readl(hpriv->main_mask_reg_addr);
2571 writelfl(tmp | mask, hpriv->main_mask_reg_addr);
2572 }
2573
2574 /**
2575 * mv_port_init - Perform some early initialization on a single port.
2576 * @port: libata data structure storing shadow register addresses
2577 * @port_mmio: base address of the port
2578 *
2579 * Initialize shadow register mmio addresses, clear outstanding
2580 * interrupts on the port, and unmask interrupts for the future
2581 * start of the port.
2582 *
2583 * LOCKING:
2584 * Inherited from caller.
2585 */
2586 static void mv_port_init(struct ata_ioports *port, void __iomem *port_mmio)
2587 {
2588 void __iomem *shd_base = port_mmio + SHD_BLK_OFS;
2589 unsigned serr_ofs;
2590
2591 /* PIO related setup
2592 */
2593 port->data_addr = shd_base + (sizeof(u32) * ATA_REG_DATA);
2594 port->error_addr =
2595 port->feature_addr = shd_base + (sizeof(u32) * ATA_REG_ERR);
2596 port->nsect_addr = shd_base + (sizeof(u32) * ATA_REG_NSECT);
2597 port->lbal_addr = shd_base + (sizeof(u32) * ATA_REG_LBAL);
2598 port->lbam_addr = shd_base + (sizeof(u32) * ATA_REG_LBAM);
2599 port->lbah_addr = shd_base + (sizeof(u32) * ATA_REG_LBAH);
2600 port->device_addr = shd_base + (sizeof(u32) * ATA_REG_DEVICE);
2601 port->status_addr =
2602 port->command_addr = shd_base + (sizeof(u32) * ATA_REG_STATUS);
2603 /* special case: control/altstatus doesn't have ATA_REG_ address */
2604 port->altstatus_addr = port->ctl_addr = shd_base + SHD_CTL_AST_OFS;
2605
2606 /* unused: */
2607 port->cmd_addr = port->bmdma_addr = port->scr_addr = NULL;
2608
2609 /* Clear any currently outstanding port interrupt conditions */
2610 serr_ofs = mv_scr_offset(SCR_ERROR);
2611 writelfl(readl(port_mmio + serr_ofs), port_mmio + serr_ofs);
2612 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
2613
2614 /* unmask all non-transient EDMA error interrupts */
2615 writelfl(~EDMA_ERR_IRQ_TRANSIENT, port_mmio + EDMA_ERR_IRQ_MASK_OFS);
2616
2617 VPRINTK("EDMA cfg=0x%08x EDMA IRQ err cause/mask=0x%08x/0x%08x\n",
2618 readl(port_mmio + EDMA_CFG_OFS),
2619 readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS),
2620 readl(port_mmio + EDMA_ERR_IRQ_MASK_OFS));
2621 }
2622
2623 static int mv_chip_id(struct ata_host *host, unsigned int board_idx)
2624 {
2625 struct pci_dev *pdev = to_pci_dev(host->dev);
2626 struct mv_host_priv *hpriv = host->private_data;
2627 u32 hp_flags = hpriv->hp_flags;
2628
2629 switch (board_idx) {
2630 case chip_5080:
2631 hpriv->ops = &mv5xxx_ops;
2632 hp_flags |= MV_HP_GEN_I;
2633
2634 switch (pdev->revision) {
2635 case 0x1:
2636 hp_flags |= MV_HP_ERRATA_50XXB0;
2637 break;
2638 case 0x3:
2639 hp_flags |= MV_HP_ERRATA_50XXB2;
2640 break;
2641 default:
2642 dev_printk(KERN_WARNING, &pdev->dev,
2643 "Applying 50XXB2 workarounds to unknown rev\n");
2644 hp_flags |= MV_HP_ERRATA_50XXB2;
2645 break;
2646 }
2647 break;
2648
2649 case chip_504x:
2650 case chip_508x:
2651 hpriv->ops = &mv5xxx_ops;
2652 hp_flags |= MV_HP_GEN_I;
2653
2654 switch (pdev->revision) {
2655 case 0x0:
2656 hp_flags |= MV_HP_ERRATA_50XXB0;
2657 break;
2658 case 0x3:
2659 hp_flags |= MV_HP_ERRATA_50XXB2;
2660 break;
2661 default:
2662 dev_printk(KERN_WARNING, &pdev->dev,
2663 "Applying B2 workarounds to unknown rev\n");
2664 hp_flags |= MV_HP_ERRATA_50XXB2;
2665 break;
2666 }
2667 break;
2668
2669 case chip_604x:
2670 case chip_608x:
2671 hpriv->ops = &mv6xxx_ops;
2672 hp_flags |= MV_HP_GEN_II;
2673
2674 switch (pdev->revision) {
2675 case 0x7:
2676 hp_flags |= MV_HP_ERRATA_60X1B2;
2677 break;
2678 case 0x9:
2679 hp_flags |= MV_HP_ERRATA_60X1C0;
2680 break;
2681 default:
2682 dev_printk(KERN_WARNING, &pdev->dev,
2683 "Applying B2 workarounds to unknown rev\n");
2684 hp_flags |= MV_HP_ERRATA_60X1B2;
2685 break;
2686 }
2687 break;
2688
2689 case chip_7042:
2690 hp_flags |= MV_HP_PCIE;
2691 if (pdev->vendor == PCI_VENDOR_ID_TTI &&
2692 (pdev->device == 0x2300 || pdev->device == 0x2310))
2693 {
2694 /*
2695 * Highpoint RocketRAID PCIe 23xx series cards:
2696 *
2697 * Unconfigured drives are treated as "Legacy"
2698 * by the BIOS, and it overwrites sector 8 with
2699 * a "Lgcy" metadata block prior to Linux boot.
2700 *
2701 * Configured drives (RAID or JBOD) leave sector 8
2702 * alone, but instead overwrite a high numbered
2703 * sector for the RAID metadata. This sector can
2704 * be determined exactly, by truncating the physical
2705 * drive capacity to a nice even GB value.
2706 *
2707 * RAID metadata is at: (dev->n_sectors & ~0xfffff)
2708 *
2709 * Warn the user, lest they think we're just buggy.
2710 */
2711 printk(KERN_WARNING DRV_NAME ": Highpoint RocketRAID"
2712 " BIOS CORRUPTS DATA on all attached drives,"
2713 " regardless of if/how they are configured."
2714 " BEWARE!\n");
2715 printk(KERN_WARNING DRV_NAME ": For data safety, do not"
2716 " use sectors 8-9 on \"Legacy\" drives,"
2717 " and avoid the final two gigabytes on"
2718 " all RocketRAID BIOS initialized drives.\n");
2719 }
2720 case chip_6042:
2721 hpriv->ops = &mv6xxx_ops;
2722 hp_flags |= MV_HP_GEN_IIE;
2723
2724 switch (pdev->revision) {
2725 case 0x0:
2726 hp_flags |= MV_HP_ERRATA_XX42A0;
2727 break;
2728 case 0x1:
2729 hp_flags |= MV_HP_ERRATA_60X1C0;
2730 break;
2731 default:
2732 dev_printk(KERN_WARNING, &pdev->dev,
2733 "Applying 60X1C0 workarounds to unknown rev\n");
2734 hp_flags |= MV_HP_ERRATA_60X1C0;
2735 break;
2736 }
2737 break;
2738 case chip_soc:
2739 hpriv->ops = &mv_soc_ops;
2740 hp_flags |= MV_HP_ERRATA_60X1C0;
2741 break;
2742
2743 default:
2744 dev_printk(KERN_ERR, host->dev,
2745 "BUG: invalid board index %u\n", board_idx);
2746 return 1;
2747 }
2748
2749 hpriv->hp_flags = hp_flags;
2750 if (hp_flags & MV_HP_PCIE) {
2751 hpriv->irq_cause_ofs = PCIE_IRQ_CAUSE_OFS;
2752 hpriv->irq_mask_ofs = PCIE_IRQ_MASK_OFS;
2753 hpriv->unmask_all_irqs = PCIE_UNMASK_ALL_IRQS;
2754 } else {
2755 hpriv->irq_cause_ofs = PCI_IRQ_CAUSE_OFS;
2756 hpriv->irq_mask_ofs = PCI_IRQ_MASK_OFS;
2757 hpriv->unmask_all_irqs = PCI_UNMASK_ALL_IRQS;
2758 }
2759
2760 return 0;
2761 }
2762
2763 /**
2764 * mv_init_host - Perform some early initialization of the host.
2765 * @host: ATA host to initialize
2766 * @board_idx: controller index
2767 *
2768 * If possible, do an early global reset of the host. Then do
2769 * our port init and clear/unmask all/relevant host interrupts.
2770 *
2771 * LOCKING:
2772 * Inherited from caller.
2773 */
2774 static int mv_init_host(struct ata_host *host, unsigned int board_idx)
2775 {
2776 int rc = 0, n_hc, port, hc;
2777 struct mv_host_priv *hpriv = host->private_data;
2778 void __iomem *mmio = hpriv->base;
2779
2780 rc = mv_chip_id(host, board_idx);
2781 if (rc)
2782 goto done;
2783
2784 if (HAS_PCI(host)) {
2785 hpriv->main_cause_reg_addr = hpriv->base +
2786 HC_MAIN_IRQ_CAUSE_OFS;
2787 hpriv->main_mask_reg_addr = hpriv->base + HC_MAIN_IRQ_MASK_OFS;
2788 } else {
2789 hpriv->main_cause_reg_addr = hpriv->base +
2790 HC_SOC_MAIN_IRQ_CAUSE_OFS;
2791 hpriv->main_mask_reg_addr = hpriv->base +
2792 HC_SOC_MAIN_IRQ_MASK_OFS;
2793 }
2794 /* global interrupt mask */
2795 writel(0, hpriv->main_mask_reg_addr);
2796
2797 n_hc = mv_get_hc_count(host->ports[0]->flags);
2798
2799 for (port = 0; port < host->n_ports; port++)
2800 hpriv->ops->read_preamp(hpriv, port, mmio);
2801
2802 rc = hpriv->ops->reset_hc(hpriv, mmio, n_hc);
2803 if (rc)
2804 goto done;
2805
2806 hpriv->ops->reset_flash(hpriv, mmio);
2807 hpriv->ops->reset_bus(host, mmio);
2808 hpriv->ops->enable_leds(hpriv, mmio);
2809
2810 for (port = 0; port < host->n_ports; port++) {
2811 if (IS_GEN_II(hpriv)) {
2812 void __iomem *port_mmio = mv_port_base(mmio, port);
2813
2814 u32 ifctl = readl(port_mmio + SATA_INTERFACE_CTL);
2815 ifctl |= (1 << 7); /* enable gen2i speed */
2816 ifctl = (ifctl & 0xfff) | 0x9b1000; /* from chip spec */
2817 writelfl(ifctl, port_mmio + SATA_INTERFACE_CTL);
2818 }
2819
2820 hpriv->ops->phy_errata(hpriv, mmio, port);
2821 }
2822
2823 for (port = 0; port < host->n_ports; port++) {
2824 struct ata_port *ap = host->ports[port];
2825 void __iomem *port_mmio = mv_port_base(mmio, port);
2826
2827 mv_port_init(&ap->ioaddr, port_mmio);
2828
2829 #ifdef CONFIG_PCI
2830 if (HAS_PCI(host)) {
2831 unsigned int offset = port_mmio - mmio;
2832 ata_port_pbar_desc(ap, MV_PRIMARY_BAR, -1, "mmio");
2833 ata_port_pbar_desc(ap, MV_PRIMARY_BAR, offset, "port");
2834 }
2835 #endif
2836 }
2837
2838 for (hc = 0; hc < n_hc; hc++) {
2839 void __iomem *hc_mmio = mv_hc_base(mmio, hc);
2840
2841 VPRINTK("HC%i: HC config=0x%08x HC IRQ cause "
2842 "(before clear)=0x%08x\n", hc,
2843 readl(hc_mmio + HC_CFG_OFS),
2844 readl(hc_mmio + HC_IRQ_CAUSE_OFS));
2845
2846 /* Clear any currently outstanding hc interrupt conditions */
2847 writelfl(0, hc_mmio + HC_IRQ_CAUSE_OFS);
2848 }
2849
2850 if (HAS_PCI(host)) {
2851 /* Clear any currently outstanding host interrupt conditions */
2852 writelfl(0, mmio + hpriv->irq_cause_ofs);
2853
2854 /* and unmask interrupt generation for host regs */
2855 writelfl(hpriv->unmask_all_irqs, mmio + hpriv->irq_mask_ofs);
2856 if (IS_GEN_I(hpriv))
2857 writelfl(~HC_MAIN_MASKED_IRQS_5,
2858 hpriv->main_mask_reg_addr);
2859 else
2860 writelfl(~HC_MAIN_MASKED_IRQS,
2861 hpriv->main_mask_reg_addr);
2862
2863 VPRINTK("HC MAIN IRQ cause/mask=0x%08x/0x%08x "
2864 "PCI int cause/mask=0x%08x/0x%08x\n",
2865 readl(hpriv->main_cause_reg_addr),
2866 readl(hpriv->main_mask_reg_addr),
2867 readl(mmio + hpriv->irq_cause_ofs),
2868 readl(mmio + hpriv->irq_mask_ofs));
2869 } else {
2870 writelfl(~HC_MAIN_MASKED_IRQS_SOC,
2871 hpriv->main_mask_reg_addr);
2872 VPRINTK("HC MAIN IRQ cause/mask=0x%08x/0x%08x\n",
2873 readl(hpriv->main_cause_reg_addr),
2874 readl(hpriv->main_mask_reg_addr));
2875 }
2876 done:
2877 return rc;
2878 }
2879
2880 static int mv_create_dma_pools(struct mv_host_priv *hpriv, struct device *dev)
2881 {
2882 hpriv->crqb_pool = dmam_pool_create("crqb_q", dev, MV_CRQB_Q_SZ,
2883 MV_CRQB_Q_SZ, 0);
2884 if (!hpriv->crqb_pool)
2885 return -ENOMEM;
2886
2887 hpriv->crpb_pool = dmam_pool_create("crpb_q", dev, MV_CRPB_Q_SZ,
2888 MV_CRPB_Q_SZ, 0);
2889 if (!hpriv->crpb_pool)
2890 return -ENOMEM;
2891
2892 hpriv->sg_tbl_pool = dmam_pool_create("sg_tbl", dev, MV_SG_TBL_SZ,
2893 MV_SG_TBL_SZ, 0);
2894 if (!hpriv->sg_tbl_pool)
2895 return -ENOMEM;
2896
2897 return 0;
2898 }
2899
2900 /**
2901 * mv_platform_probe - handle a positive probe of an soc Marvell
2902 * host
2903 * @pdev: platform device found
2904 *
2905 * LOCKING:
2906 * Inherited from caller.
2907 */
2908 static int mv_platform_probe(struct platform_device *pdev)
2909 {
2910 static int printed_version;
2911 const struct mv_sata_platform_data *mv_platform_data;
2912 const struct ata_port_info *ppi[] =
2913 { &mv_port_info[chip_soc], NULL };
2914 struct ata_host *host;
2915 struct mv_host_priv *hpriv;
2916 struct resource *res;
2917 int n_ports, rc;
2918
2919 if (!printed_version++)
2920 dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
2921
2922 /*
2923 * Simple resource validation ..
2924 */
2925 if (unlikely(pdev->num_resources != 2)) {
2926 dev_err(&pdev->dev, "invalid number of resources\n");
2927 return -EINVAL;
2928 }
2929
2930 /*
2931 * Get the register base first
2932 */
2933 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2934 if (res == NULL)
2935 return -EINVAL;
2936
2937 /* allocate host */
2938 mv_platform_data = pdev->dev.platform_data;
2939 n_ports = mv_platform_data->n_ports;
2940
2941 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
2942 hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
2943
2944 if (!host || !hpriv)
2945 return -ENOMEM;
2946 host->private_data = hpriv;
2947 hpriv->n_ports = n_ports;
2948
2949 host->iomap = NULL;
2950 hpriv->base = devm_ioremap(&pdev->dev, res->start,
2951 res->end - res->start + 1);
2952 hpriv->base -= MV_SATAHC0_REG_BASE;
2953
2954 rc = mv_create_dma_pools(hpriv, &pdev->dev);
2955 if (rc)
2956 return rc;
2957
2958 /* initialize adapter */
2959 rc = mv_init_host(host, chip_soc);
2960 if (rc)
2961 return rc;
2962
2963 dev_printk(KERN_INFO, &pdev->dev,
2964 "slots %u ports %d\n", (unsigned)MV_MAX_Q_DEPTH,
2965 host->n_ports);
2966
2967 return ata_host_activate(host, platform_get_irq(pdev, 0), mv_interrupt,
2968 IRQF_SHARED, &mv6_sht);
2969 }
2970
2971 /*
2972 *
2973 * mv_platform_remove - unplug a platform interface
2974 * @pdev: platform device
2975 *
2976 * A platform bus SATA device has been unplugged. Perform the needed
2977 * cleanup. Also called on module unload for any active devices.
2978 */
2979 static int __devexit mv_platform_remove(struct platform_device *pdev)
2980 {
2981 struct device *dev = &pdev->dev;
2982 struct ata_host *host = dev_get_drvdata(dev);
2983
2984 ata_host_detach(host);
2985 return 0;
2986 }
2987
2988 static struct platform_driver mv_platform_driver = {
2989 .probe = mv_platform_probe,
2990 .remove = __devexit_p(mv_platform_remove),
2991 .driver = {
2992 .name = DRV_NAME,
2993 .owner = THIS_MODULE,
2994 },
2995 };
2996
2997
2998 #ifdef CONFIG_PCI
2999 static int mv_pci_init_one(struct pci_dev *pdev,
3000 const struct pci_device_id *ent);
3001
3002
3003 static struct pci_driver mv_pci_driver = {
3004 .name = DRV_NAME,
3005 .id_table = mv_pci_tbl,
3006 .probe = mv_pci_init_one,
3007 .remove = ata_pci_remove_one,
3008 };
3009
3010 /*
3011 * module options
3012 */
3013 static int msi; /* Use PCI msi; either zero (off, default) or non-zero */
3014
3015
3016 /* move to PCI layer or libata core? */
3017 static int pci_go_64(struct pci_dev *pdev)
3018 {
3019 int rc;
3020
3021 if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
3022 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
3023 if (rc) {
3024 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
3025 if (rc) {
3026 dev_printk(KERN_ERR, &pdev->dev,
3027 "64-bit DMA enable failed\n");
3028 return rc;
3029 }
3030 }
3031 } else {
3032 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
3033 if (rc) {
3034 dev_printk(KERN_ERR, &pdev->dev,
3035 "32-bit DMA enable failed\n");
3036 return rc;
3037 }
3038 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
3039 if (rc) {
3040 dev_printk(KERN_ERR, &pdev->dev,
3041 "32-bit consistent DMA enable failed\n");
3042 return rc;
3043 }
3044 }
3045
3046 return rc;
3047 }
3048
3049 /**
3050 * mv_print_info - Dump key info to kernel log for perusal.
3051 * @host: ATA host to print info about
3052 *
3053 * FIXME: complete this.
3054 *
3055 * LOCKING:
3056 * Inherited from caller.
3057 */
3058 static void mv_print_info(struct ata_host *host)
3059 {
3060 struct pci_dev *pdev = to_pci_dev(host->dev);
3061 struct mv_host_priv *hpriv = host->private_data;
3062 u8 scc;
3063 const char *scc_s, *gen;
3064
3065 /* Use this to determine the HW stepping of the chip so we know
3066 * what errata to workaround
3067 */
3068 pci_read_config_byte(pdev, PCI_CLASS_DEVICE, &scc);
3069 if (scc == 0)
3070 scc_s = "SCSI";
3071 else if (scc == 0x01)
3072 scc_s = "RAID";
3073 else
3074 scc_s = "?";
3075
3076 if (IS_GEN_I(hpriv))
3077 gen = "I";
3078 else if (IS_GEN_II(hpriv))
3079 gen = "II";
3080 else if (IS_GEN_IIE(hpriv))
3081 gen = "IIE";
3082 else
3083 gen = "?";
3084
3085 dev_printk(KERN_INFO, &pdev->dev,
3086 "Gen-%s %u slots %u ports %s mode IRQ via %s\n",
3087 gen, (unsigned)MV_MAX_Q_DEPTH, host->n_ports,
3088 scc_s, (MV_HP_FLAG_MSI & hpriv->hp_flags) ? "MSI" : "INTx");
3089 }
3090
3091 /**
3092 * mv_pci_init_one - handle a positive probe of a PCI Marvell host
3093 * @pdev: PCI device found
3094 * @ent: PCI device ID entry for the matched host
3095 *
3096 * LOCKING:
3097 * Inherited from caller.
3098 */
3099 static int mv_pci_init_one(struct pci_dev *pdev,
3100 const struct pci_device_id *ent)
3101 {
3102 static int printed_version;
3103 unsigned int board_idx = (unsigned int)ent->driver_data;
3104 const struct ata_port_info *ppi[] = { &mv_port_info[board_idx], NULL };
3105 struct ata_host *host;
3106 struct mv_host_priv *hpriv;
3107 int n_ports, rc;
3108
3109 if (!printed_version++)
3110 dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
3111
3112 /* allocate host */
3113 n_ports = mv_get_hc_count(ppi[0]->flags) * MV_PORTS_PER_HC;
3114
3115 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
3116 hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
3117 if (!host || !hpriv)
3118 return -ENOMEM;
3119 host->private_data = hpriv;
3120 hpriv->n_ports = n_ports;
3121
3122 /* acquire resources */
3123 rc = pcim_enable_device(pdev);
3124 if (rc)
3125 return rc;
3126
3127 rc = pcim_iomap_regions(pdev, 1 << MV_PRIMARY_BAR, DRV_NAME);
3128 if (rc == -EBUSY)
3129 pcim_pin_device(pdev);
3130 if (rc)
3131 return rc;
3132 host->iomap = pcim_iomap_table(pdev);
3133 hpriv->base = host->iomap[MV_PRIMARY_BAR];
3134
3135 rc = pci_go_64(pdev);
3136 if (rc)
3137 return rc;
3138
3139 rc = mv_create_dma_pools(hpriv, &pdev->dev);
3140 if (rc)
3141 return rc;
3142
3143 /* initialize adapter */
3144 rc = mv_init_host(host, board_idx);
3145 if (rc)
3146 return rc;
3147
3148 /* Enable interrupts */
3149 if (msi && pci_enable_msi(pdev))
3150 pci_intx(pdev, 1);
3151
3152 mv_dump_pci_cfg(pdev, 0x68);
3153 mv_print_info(host);
3154
3155 pci_set_master(pdev);
3156 pci_try_set_mwi(pdev);
3157 return ata_host_activate(host, pdev->irq, mv_interrupt, IRQF_SHARED,
3158 IS_GEN_I(hpriv) ? &mv5_sht : &mv6_sht);
3159 }
3160 #endif
3161
3162 static int mv_platform_probe(struct platform_device *pdev);
3163 static int __devexit mv_platform_remove(struct platform_device *pdev);
3164
3165 static int __init mv_init(void)
3166 {
3167 int rc = -ENODEV;
3168 #ifdef CONFIG_PCI
3169 rc = pci_register_driver(&mv_pci_driver);
3170 if (rc < 0)
3171 return rc;
3172 #endif
3173 rc = platform_driver_register(&mv_platform_driver);
3174
3175 #ifdef CONFIG_PCI
3176 if (rc < 0)
3177 pci_unregister_driver(&mv_pci_driver);
3178 #endif
3179 return rc;
3180 }
3181
3182 static void __exit mv_exit(void)
3183 {
3184 #ifdef CONFIG_PCI
3185 pci_unregister_driver(&mv_pci_driver);
3186 #endif
3187 platform_driver_unregister(&mv_platform_driver);
3188 }
3189
3190 MODULE_AUTHOR("Brett Russ");
3191 MODULE_DESCRIPTION("SCSI low-level driver for Marvell SATA controllers");
3192 MODULE_LICENSE("GPL");
3193 MODULE_DEVICE_TABLE(pci, mv_pci_tbl);
3194 MODULE_VERSION(DRV_VERSION);
3195 MODULE_ALIAS("platform:sata_mv");
3196
3197 #ifdef CONFIG_PCI
3198 module_param(msi, int, 0444);
3199 MODULE_PARM_DESC(msi, "Enable use of PCI MSI (0=off, 1=on)");
3200 #endif
3201
3202 module_init(mv_init);
3203 module_exit(mv_exit);
Linux kernel - Deliverables
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