1/*
2 * sata_mv.c - Marvell SATA support
3 *
4 * Copyright 2008-2009: Marvell Corporation, all rights reserved.
5 * Copyright 2005: EMC Corporation, all rights reserved.
6 * Copyright 2005 Red Hat, Inc. All rights reserved.
7 *
8 * Originally written by Brett Russ.
9 * Extensive overhaul and enhancement by Mark Lord <mlord@pobox.com>.
10 *
11 * Please ALWAYS copy linux-ide@vger.kernel.org on emails.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; version 2 of the License.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 *
26 */
27
28/*
29 * sata_mv TODO list:
30 *
31 * --> Develop a low-power-consumption strategy, and implement it.
32 *
33 * --> Add sysfs attributes for per-chip / per-HC IRQ coalescing thresholds.
34 *
35 * --> [Experiment, Marvell value added] Is it possible to use target
36 * mode to cross-connect two Linux boxes with Marvell cards? If so,
37 * creating LibATA target mode support would be very interesting.
38 *
39 * Target mode, for those without docs, is the ability to directly
40 * connect two SATA ports.
41 */
42
43/*
44 * 80x1-B2 errata PCI#11:
45 *
46 * Users of the 6041/6081 Rev.B2 chips (current is C0)
47 * should be careful to insert those cards only onto PCI-X bus #0,
48 * and only in device slots 0..7, not higher. The chips may not
49 * work correctly otherwise (note: this is a pretty rare condition).
50 */
51
52#include <linux/kernel.h>
53#include <linux/module.h>
54#include <linux/pci.h>
55#include <linux/init.h>
56#include <linux/blkdev.h>
57#include <linux/delay.h>
58#include <linux/interrupt.h>
59#include <linux/dmapool.h>
60#include <linux/dma-mapping.h>
61#include <linux/device.h>
62#include <linux/clk.h>
63#include <linux/phy/phy.h>
64#include <linux/platform_device.h>
65#include <linux/ata_platform.h>
66#include <linux/mbus.h>
67#include <linux/bitops.h>
68#include <linux/gfp.h>
69#include <linux/of.h>
70#include <linux/of_irq.h>
71#include <scsi/scsi_host.h>
72#include <scsi/scsi_cmnd.h>
73#include <scsi/scsi_device.h>
74#include <linux/libata.h>
75
76#define DRV_NAME "sata_mv"
77#define DRV_VERSION "1.28"
78
79/*
80 * module options
81 */
82
83#ifdef CONFIG_PCI
84static int msi;
85module_param(msi, int, S_IRUGO);
86MODULE_PARM_DESC(msi, "Enable use of PCI MSI (0=off, 1=on)");
87#endif
88
89static int irq_coalescing_io_count;
90module_param(irq_coalescing_io_count, int, S_IRUGO);
91MODULE_PARM_DESC(irq_coalescing_io_count,
92 "IRQ coalescing I/O count threshold (0..255)");
93
94static int irq_coalescing_usecs;
95module_param(irq_coalescing_usecs, int, S_IRUGO);
96MODULE_PARM_DESC(irq_coalescing_usecs,
97 "IRQ coalescing time threshold in usecs");
98
99enum {
100 /* BAR's are enumerated in terms of pci_resource_start() terms */
101 MV_PRIMARY_BAR = 0, /* offset 0x10: memory space */
102 MV_IO_BAR = 2, /* offset 0x18: IO space */
103 MV_MISC_BAR = 3, /* offset 0x1c: FLASH, NVRAM, SRAM */
104
105 MV_MAJOR_REG_AREA_SZ = 0x10000, /* 64KB */
106 MV_MINOR_REG_AREA_SZ = 0x2000, /* 8KB */
107
108 /* For use with both IRQ coalescing methods ("all ports" or "per-HC" */
109 COAL_CLOCKS_PER_USEC = 150, /* for calculating COAL_TIMEs */
110 MAX_COAL_TIME_THRESHOLD = ((1 << 24) - 1), /* internal clocks count */
111 MAX_COAL_IO_COUNT = 255, /* completed I/O count */
112
113 MV_PCI_REG_BASE = 0,
114
115 /*
116 * Per-chip ("all ports") interrupt coalescing feature.
117 * This is only for GEN_II / GEN_IIE hardware.
118 *
119 * Coalescing defers the interrupt until either the IO_THRESHOLD
120 * (count of completed I/Os) is met, or the TIME_THRESHOLD is met.
121 */
122 COAL_REG_BASE = 0x18000,
123 IRQ_COAL_CAUSE = (COAL_REG_BASE + 0x08),
124 ALL_PORTS_COAL_IRQ = (1 << 4), /* all ports irq event */
125
126 IRQ_COAL_IO_THRESHOLD = (COAL_REG_BASE + 0xcc),
127 IRQ_COAL_TIME_THRESHOLD = (COAL_REG_BASE + 0xd0),
128
129 /*
130 * Registers for the (unused here) transaction coalescing feature:
131 */
132 TRAN_COAL_CAUSE_LO = (COAL_REG_BASE + 0x88),
133 TRAN_COAL_CAUSE_HI = (COAL_REG_BASE + 0x8c),
134
135 SATAHC0_REG_BASE = 0x20000,
136 FLASH_CTL = 0x1046c,
137 GPIO_PORT_CTL = 0x104f0,
138 RESET_CFG = 0x180d8,
139
140 MV_PCI_REG_SZ = MV_MAJOR_REG_AREA_SZ,
141 MV_SATAHC_REG_SZ = MV_MAJOR_REG_AREA_SZ,
142 MV_SATAHC_ARBTR_REG_SZ = MV_MINOR_REG_AREA_SZ, /* arbiter */
143 MV_PORT_REG_SZ = MV_MINOR_REG_AREA_SZ,
144
145 MV_MAX_Q_DEPTH = 32,
146 MV_MAX_Q_DEPTH_MASK = MV_MAX_Q_DEPTH - 1,
147
148 /* CRQB needs alignment on a 1KB boundary. Size == 1KB
149 * CRPB needs alignment on a 256B boundary. Size == 256B
150 * ePRD (SG) entries need alignment on a 16B boundary. Size == 16B
151 */
152 MV_CRQB_Q_SZ = (32 * MV_MAX_Q_DEPTH),
153 MV_CRPB_Q_SZ = (8 * MV_MAX_Q_DEPTH),
154 MV_MAX_SG_CT = 256,
155 MV_SG_TBL_SZ = (16 * MV_MAX_SG_CT),
156
157 /* Determine hc from 0-7 port: hc = port >> MV_PORT_HC_SHIFT */
158 MV_PORT_HC_SHIFT = 2,
159 MV_PORTS_PER_HC = (1 << MV_PORT_HC_SHIFT), /* 4 */
160 /* Determine hc port from 0-7 port: hardport = port & MV_PORT_MASK */
161 MV_PORT_MASK = (MV_PORTS_PER_HC - 1), /* 3 */
162
163 /* Host Flags */
164 MV_FLAG_DUAL_HC = (1 << 30), /* two SATA Host Controllers */
165
166 MV_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_PIO_POLLING,
167
168 MV_GEN_I_FLAGS = MV_COMMON_FLAGS | ATA_FLAG_NO_ATAPI,
169
170 MV_GEN_II_FLAGS = MV_COMMON_FLAGS | ATA_FLAG_NCQ |
171 ATA_FLAG_PMP | ATA_FLAG_ACPI_SATA,
172
173 MV_GEN_IIE_FLAGS = MV_GEN_II_FLAGS | ATA_FLAG_AN,
174
175 CRQB_FLAG_READ = (1 << 0),
176 CRQB_TAG_SHIFT = 1,
177 CRQB_IOID_SHIFT = 6, /* CRQB Gen-II/IIE IO Id shift */
178 CRQB_PMP_SHIFT = 12, /* CRQB Gen-II/IIE PMP shift */
179 CRQB_HOSTQ_SHIFT = 17, /* CRQB Gen-II/IIE HostQueTag shift */
180 CRQB_CMD_ADDR_SHIFT = 8,
181 CRQB_CMD_CS = (0x2 << 11),
182 CRQB_CMD_LAST = (1 << 15),
183
184 CRPB_FLAG_STATUS_SHIFT = 8,
185 CRPB_IOID_SHIFT_6 = 5, /* CRPB Gen-II IO Id shift */
186 CRPB_IOID_SHIFT_7 = 7, /* CRPB Gen-IIE IO Id shift */
187
188 EPRD_FLAG_END_OF_TBL = (1 << 31),
189
190 /* PCI interface registers */
191
192 MV_PCI_COMMAND = 0xc00,
193 MV_PCI_COMMAND_MWRCOM = (1 << 4), /* PCI Master Write Combining */
194 MV_PCI_COMMAND_MRDTRIG = (1 << 7), /* PCI Master Read Trigger */
195
196 PCI_MAIN_CMD_STS = 0xd30,
197 STOP_PCI_MASTER = (1 << 2),
198 PCI_MASTER_EMPTY = (1 << 3),
199 GLOB_SFT_RST = (1 << 4),
200
201 MV_PCI_MODE = 0xd00,
202 MV_PCI_MODE_MASK = 0x30,
203
204 MV_PCI_EXP_ROM_BAR_CTL = 0xd2c,
205 MV_PCI_DISC_TIMER = 0xd04,
206 MV_PCI_MSI_TRIGGER = 0xc38,
207 MV_PCI_SERR_MASK = 0xc28,
208 MV_PCI_XBAR_TMOUT = 0x1d04,
209 MV_PCI_ERR_LOW_ADDRESS = 0x1d40,
210 MV_PCI_ERR_HIGH_ADDRESS = 0x1d44,
211 MV_PCI_ERR_ATTRIBUTE = 0x1d48,
212 MV_PCI_ERR_COMMAND = 0x1d50,
213
214 PCI_IRQ_CAUSE = 0x1d58,
215 PCI_IRQ_MASK = 0x1d5c,
216 PCI_UNMASK_ALL_IRQS = 0x7fffff, /* bits 22-0 */
217
218 PCIE_IRQ_CAUSE = 0x1900,
219 PCIE_IRQ_MASK = 0x1910,
220 PCIE_UNMASK_ALL_IRQS = 0x40a, /* assorted bits */
221
222 /* Host Controller Main Interrupt Cause/Mask registers (1 per-chip) */
223 PCI_HC_MAIN_IRQ_CAUSE = 0x1d60,
224 PCI_HC_MAIN_IRQ_MASK = 0x1d64,
225 SOC_HC_MAIN_IRQ_CAUSE = 0x20020,
226 SOC_HC_MAIN_IRQ_MASK = 0x20024,
227 ERR_IRQ = (1 << 0), /* shift by (2 * port #) */
228 DONE_IRQ = (1 << 1), /* shift by (2 * port #) */
229 HC0_IRQ_PEND = 0x1ff, /* bits 0-8 = HC0's ports */
230 HC_SHIFT = 9, /* bits 9-17 = HC1's ports */
231 DONE_IRQ_0_3 = 0x000000aa, /* DONE_IRQ ports 0,1,2,3 */
232 DONE_IRQ_4_7 = (DONE_IRQ_0_3 << HC_SHIFT), /* 4,5,6,7 */
233 PCI_ERR = (1 << 18),
234 TRAN_COAL_LO_DONE = (1 << 19), /* transaction coalescing */
235 TRAN_COAL_HI_DONE = (1 << 20), /* transaction coalescing */
236 PORTS_0_3_COAL_DONE = (1 << 8), /* HC0 IRQ coalescing */
237 PORTS_4_7_COAL_DONE = (1 << 17), /* HC1 IRQ coalescing */
238 ALL_PORTS_COAL_DONE = (1 << 21), /* GEN_II(E) IRQ coalescing */
239 GPIO_INT = (1 << 22),
240 SELF_INT = (1 << 23),
241 TWSI_INT = (1 << 24),
242 HC_MAIN_RSVD = (0x7f << 25), /* bits 31-25 */
243 HC_MAIN_RSVD_5 = (0x1fff << 19), /* bits 31-19 */
244 HC_MAIN_RSVD_SOC = (0x3fffffb << 6), /* bits 31-9, 7-6 */
245
246 /* SATAHC registers */
247 HC_CFG = 0x00,
248
249 HC_IRQ_CAUSE = 0x14,
250 DMA_IRQ = (1 << 0), /* shift by port # */
251 HC_COAL_IRQ = (1 << 4), /* IRQ coalescing */
252 DEV_IRQ = (1 << 8), /* shift by port # */
253
254 /*
255 * Per-HC (Host-Controller) interrupt coalescing feature.
256 * This is present on all chip generations.
257 *
258 * Coalescing defers the interrupt until either the IO_THRESHOLD
259 * (count of completed I/Os) is met, or the TIME_THRESHOLD is met.
260 */
261 HC_IRQ_COAL_IO_THRESHOLD = 0x000c,
262 HC_IRQ_COAL_TIME_THRESHOLD = 0x0010,
263
264 SOC_LED_CTRL = 0x2c,
265 SOC_LED_CTRL_BLINK = (1 << 0), /* Active LED blink */
266 SOC_LED_CTRL_ACT_PRESENCE = (1 << 2), /* Multiplex dev presence */
267 /* with dev activity LED */
268
269 /* Shadow block registers */
270 SHD_BLK = 0x100,
271 SHD_CTL_AST = 0x20, /* ofs from SHD_BLK */
272
273 /* SATA registers */
274 SATA_STATUS = 0x300, /* ctrl, err regs follow status */
275 SATA_ACTIVE = 0x350,
276 FIS_IRQ_CAUSE = 0x364,
277 FIS_IRQ_CAUSE_AN = (1 << 9), /* async notification */
278
279 LTMODE = 0x30c, /* requires read-after-write */
280 LTMODE_BIT8 = (1 << 8), /* unknown, but necessary */
281
282 PHY_MODE2 = 0x330,
283 PHY_MODE3 = 0x310,
284
285 PHY_MODE4 = 0x314, /* requires read-after-write */
286 PHY_MODE4_CFG_MASK = 0x00000003, /* phy internal config field */
287 PHY_MODE4_CFG_VALUE = 0x00000001, /* phy internal config field */
288 PHY_MODE4_RSVD_ZEROS = 0x5de3fffa, /* Gen2e always write zeros */
289 PHY_MODE4_RSVD_ONES = 0x00000005, /* Gen2e always write ones */
290
291 SATA_IFCTL = 0x344,
292 SATA_TESTCTL = 0x348,
293 SATA_IFSTAT = 0x34c,
294 VENDOR_UNIQUE_FIS = 0x35c,
295
296 FISCFG = 0x360,
297 FISCFG_WAIT_DEV_ERR = (1 << 8), /* wait for host on DevErr */
298 FISCFG_SINGLE_SYNC = (1 << 16), /* SYNC on DMA activation */
299
300 PHY_MODE9_GEN2 = 0x398,
301 PHY_MODE9_GEN1 = 0x39c,
302 PHYCFG_OFS = 0x3a0, /* only in 65n devices */
303
304 MV5_PHY_MODE = 0x74,
305 MV5_LTMODE = 0x30,
306 MV5_PHY_CTL = 0x0C,
307 SATA_IFCFG = 0x050,
308 LP_PHY_CTL = 0x058,
309 LP_PHY_CTL_PIN_PU_PLL = (1 << 0),
310 LP_PHY_CTL_PIN_PU_RX = (1 << 1),
311 LP_PHY_CTL_PIN_PU_TX = (1 << 2),
312 LP_PHY_CTL_GEN_TX_3G = (1 << 5),
313 LP_PHY_CTL_GEN_RX_3G = (1 << 9),
314
315 MV_M2_PREAMP_MASK = 0x7e0,
316
317 /* Port registers */
318 EDMA_CFG = 0,
319 EDMA_CFG_Q_DEPTH = 0x1f, /* max device queue depth */
320 EDMA_CFG_NCQ = (1 << 5), /* for R/W FPDMA queued */
321 EDMA_CFG_NCQ_GO_ON_ERR = (1 << 14), /* continue on error */
322 EDMA_CFG_RD_BRST_EXT = (1 << 11), /* read burst 512B */
323 EDMA_CFG_WR_BUFF_LEN = (1 << 13), /* write buffer 512B */
324 EDMA_CFG_EDMA_FBS = (1 << 16), /* EDMA FIS-Based Switching */
325 EDMA_CFG_FBS = (1 << 26), /* FIS-Based Switching */
326
327 EDMA_ERR_IRQ_CAUSE = 0x8,
328 EDMA_ERR_IRQ_MASK = 0xc,
329 EDMA_ERR_D_PAR = (1 << 0), /* UDMA data parity err */
330 EDMA_ERR_PRD_PAR = (1 << 1), /* UDMA PRD parity err */
331 EDMA_ERR_DEV = (1 << 2), /* device error */
332 EDMA_ERR_DEV_DCON = (1 << 3), /* device disconnect */
333 EDMA_ERR_DEV_CON = (1 << 4), /* device connected */
334 EDMA_ERR_SERR = (1 << 5), /* SError bits [WBDST] raised */
335 EDMA_ERR_SELF_DIS = (1 << 7), /* Gen II/IIE self-disable */
336 EDMA_ERR_SELF_DIS_5 = (1 << 8), /* Gen I self-disable */
337 EDMA_ERR_BIST_ASYNC = (1 << 8), /* BIST FIS or Async Notify */
338 EDMA_ERR_TRANS_IRQ_7 = (1 << 8), /* Gen IIE transprt layer irq */
339 EDMA_ERR_CRQB_PAR = (1 << 9), /* CRQB parity error */
340 EDMA_ERR_CRPB_PAR = (1 << 10), /* CRPB parity error */
341 EDMA_ERR_INTRL_PAR = (1 << 11), /* internal parity error */
342 EDMA_ERR_IORDY = (1 << 12), /* IORdy timeout */
343
344 EDMA_ERR_LNK_CTRL_RX = (0xf << 13), /* link ctrl rx error */
345 EDMA_ERR_LNK_CTRL_RX_0 = (1 << 13), /* transient: CRC err */
346 EDMA_ERR_LNK_CTRL_RX_1 = (1 << 14), /* transient: FIFO err */
347 EDMA_ERR_LNK_CTRL_RX_2 = (1 << 15), /* fatal: caught SYNC */
348 EDMA_ERR_LNK_CTRL_RX_3 = (1 << 16), /* transient: FIS rx err */
349
350 EDMA_ERR_LNK_DATA_RX = (0xf << 17), /* link data rx error */
351
352 EDMA_ERR_LNK_CTRL_TX = (0x1f << 21), /* link ctrl tx error */
353 EDMA_ERR_LNK_CTRL_TX_0 = (1 << 21), /* transient: CRC err */
354 EDMA_ERR_LNK_CTRL_TX_1 = (1 << 22), /* transient: FIFO err */
355 EDMA_ERR_LNK_CTRL_TX_2 = (1 << 23), /* transient: caught SYNC */
356 EDMA_ERR_LNK_CTRL_TX_3 = (1 << 24), /* transient: caught DMAT */
357 EDMA_ERR_LNK_CTRL_TX_4 = (1 << 25), /* transient: FIS collision */
358
359 EDMA_ERR_LNK_DATA_TX = (0x1f << 26), /* link data tx error */
360
361 EDMA_ERR_TRANS_PROTO = (1 << 31), /* transport protocol error */
362 EDMA_ERR_OVERRUN_5 = (1 << 5),
363 EDMA_ERR_UNDERRUN_5 = (1 << 6),
364
365 EDMA_ERR_IRQ_TRANSIENT = EDMA_ERR_LNK_CTRL_RX_0 |
366 EDMA_ERR_LNK_CTRL_RX_1 |
367 EDMA_ERR_LNK_CTRL_RX_3 |
368 EDMA_ERR_LNK_CTRL_TX,
369
370 EDMA_EH_FREEZE = EDMA_ERR_D_PAR |
371 EDMA_ERR_PRD_PAR |
372 EDMA_ERR_DEV_DCON |
373 EDMA_ERR_DEV_CON |
374 EDMA_ERR_SERR |
375 EDMA_ERR_SELF_DIS |
376 EDMA_ERR_CRQB_PAR |
377 EDMA_ERR_CRPB_PAR |
378 EDMA_ERR_INTRL_PAR |
379 EDMA_ERR_IORDY |
380 EDMA_ERR_LNK_CTRL_RX_2 |
381 EDMA_ERR_LNK_DATA_RX |
382 EDMA_ERR_LNK_DATA_TX |
383 EDMA_ERR_TRANS_PROTO,
384
385 EDMA_EH_FREEZE_5 = EDMA_ERR_D_PAR |
386 EDMA_ERR_PRD_PAR |
387 EDMA_ERR_DEV_DCON |
388 EDMA_ERR_DEV_CON |
389 EDMA_ERR_OVERRUN_5 |
390 EDMA_ERR_UNDERRUN_5 |
391 EDMA_ERR_SELF_DIS_5 |
392 EDMA_ERR_CRQB_PAR |
393 EDMA_ERR_CRPB_PAR |
394 EDMA_ERR_INTRL_PAR |
395 EDMA_ERR_IORDY,
396
397 EDMA_REQ_Q_BASE_HI = 0x10,
398 EDMA_REQ_Q_IN_PTR = 0x14, /* also contains BASE_LO */
399
400 EDMA_REQ_Q_OUT_PTR = 0x18,
401 EDMA_REQ_Q_PTR_SHIFT = 5,
402
403 EDMA_RSP_Q_BASE_HI = 0x1c,
404 EDMA_RSP_Q_IN_PTR = 0x20,
405 EDMA_RSP_Q_OUT_PTR = 0x24, /* also contains BASE_LO */
406 EDMA_RSP_Q_PTR_SHIFT = 3,
407
408 EDMA_CMD = 0x28, /* EDMA command register */
409 EDMA_EN = (1 << 0), /* enable EDMA */
410 EDMA_DS = (1 << 1), /* disable EDMA; self-negated */
411 EDMA_RESET = (1 << 2), /* reset eng/trans/link/phy */
412
413 EDMA_STATUS = 0x30, /* EDMA engine status */
414 EDMA_STATUS_CACHE_EMPTY = (1 << 6), /* GenIIe command cache empty */
415 EDMA_STATUS_IDLE = (1 << 7), /* GenIIe EDMA enabled/idle */
416
417 EDMA_IORDY_TMOUT = 0x34,
418 EDMA_ARB_CFG = 0x38,
419
420 EDMA_HALTCOND = 0x60, /* GenIIe halt conditions */
421 EDMA_UNKNOWN_RSVD = 0x6C, /* GenIIe unknown/reserved */
422
423 BMDMA_CMD = 0x224, /* bmdma command register */
424 BMDMA_STATUS = 0x228, /* bmdma status register */
425 BMDMA_PRD_LOW = 0x22c, /* bmdma PRD addr 31:0 */
426 BMDMA_PRD_HIGH = 0x230, /* bmdma PRD addr 63:32 */
427
428 /* Host private flags (hp_flags) */
429 MV_HP_FLAG_MSI = (1 << 0),
430 MV_HP_ERRATA_50XXB0 = (1 << 1),
431 MV_HP_ERRATA_50XXB2 = (1 << 2),
432 MV_HP_ERRATA_60X1B2 = (1 << 3),
433 MV_HP_ERRATA_60X1C0 = (1 << 4),
434 MV_HP_GEN_I = (1 << 6), /* Generation I: 50xx */
435 MV_HP_GEN_II = (1 << 7), /* Generation II: 60xx */
436 MV_HP_GEN_IIE = (1 << 8), /* Generation IIE: 6042/7042 */
437 MV_HP_PCIE = (1 << 9), /* PCIe bus/regs: 7042 */
438 MV_HP_CUT_THROUGH = (1 << 10), /* can use EDMA cut-through */
439 MV_HP_FLAG_SOC = (1 << 11), /* SystemOnChip, no PCI */
440 MV_HP_QUIRK_LED_BLINK_EN = (1 << 12), /* is led blinking enabled? */
441 MV_HP_FIX_LP_PHY_CTL = (1 << 13), /* fix speed in LP_PHY_CTL ? */
442
443 /* Port private flags (pp_flags) */
444 MV_PP_FLAG_EDMA_EN = (1 << 0), /* is EDMA engine enabled? */
445 MV_PP_FLAG_NCQ_EN = (1 << 1), /* is EDMA set up for NCQ? */
446 MV_PP_FLAG_FBS_EN = (1 << 2), /* is EDMA set up for FBS? */
447 MV_PP_FLAG_DELAYED_EH = (1 << 3), /* delayed dev err handling */
448 MV_PP_FLAG_FAKE_ATA_BUSY = (1 << 4), /* ignore initial ATA_DRDY */
449};
450
451#define IS_GEN_I(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_I)
452#define IS_GEN_II(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_II)
453#define IS_GEN_IIE(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_IIE)
454#define IS_PCIE(hpriv) ((hpriv)->hp_flags & MV_HP_PCIE)
455#define IS_SOC(hpriv) ((hpriv)->hp_flags & MV_HP_FLAG_SOC)
456
457#define WINDOW_CTRL(i) (0x20030 + ((i) << 4))
458#define WINDOW_BASE(i) (0x20034 + ((i) << 4))
459
460enum {
461 /* DMA boundary 0xffff is required by the s/g splitting
462 * we need on /length/ in mv_fill-sg().
463 */
464 MV_DMA_BOUNDARY = 0xffffU,
465
466 /* mask of register bits containing lower 32 bits
467 * of EDMA request queue DMA address
468 */
469 EDMA_REQ_Q_BASE_LO_MASK = 0xfffffc00U,
470
471 /* ditto, for response queue */
472 EDMA_RSP_Q_BASE_LO_MASK = 0xffffff00U,
473};
474
475enum chip_type {
476 chip_504x,
477 chip_508x,
478 chip_5080,
479 chip_604x,
480 chip_608x,
481 chip_6042,
482 chip_7042,
483 chip_soc,
484};
485
486/* Command ReQuest Block: 32B */
487struct mv_crqb {
488 __le32 sg_addr;
489 __le32 sg_addr_hi;
490 __le16 ctrl_flags;
491 __le16 ata_cmd[11];
492};
493
494struct mv_crqb_iie {
495 __le32 addr;
496 __le32 addr_hi;
497 __le32 flags;
498 __le32 len;
499 __le32 ata_cmd[4];
500};
501
502/* Command ResPonse Block: 8B */
503struct mv_crpb {
504 __le16 id;
505 __le16 flags;
506 __le32 tmstmp;
507};
508
509/* EDMA Physical Region Descriptor (ePRD); A.K.A. SG */
510struct mv_sg {
511 __le32 addr;
512 __le32 flags_size;
513 __le32 addr_hi;
514 __le32 reserved;
515};
516
517/*
518 * We keep a local cache of a few frequently accessed port
519 * registers here, to avoid having to read them (very slow)
520 * when switching between EDMA and non-EDMA modes.
521 */
522struct mv_cached_regs {
523 u32 fiscfg;
524 u32 ltmode;
525 u32 haltcond;
526 u32 unknown_rsvd;
527};
528
529struct mv_port_priv {
530 struct mv_crqb *crqb;
531 dma_addr_t crqb_dma;
532 struct mv_crpb *crpb;
533 dma_addr_t crpb_dma;
534 struct mv_sg *sg_tbl[MV_MAX_Q_DEPTH];
535 dma_addr_t sg_tbl_dma[MV_MAX_Q_DEPTH];
536
537 unsigned int req_idx;
538 unsigned int resp_idx;
539
540 u32 pp_flags;
541 struct mv_cached_regs cached;
542 unsigned int delayed_eh_pmp_map;
543};
544
545struct mv_port_signal {
546 u32 amps;
547 u32 pre;
548};
549
550struct mv_host_priv {
551 u32 hp_flags;
552 unsigned int board_idx;
553 u32 main_irq_mask;
554 struct mv_port_signal signal[8];
555 const struct mv_hw_ops *ops;
556 int n_ports;
557 void __iomem *base;
558 void __iomem *main_irq_cause_addr;
559 void __iomem *main_irq_mask_addr;
560 u32 irq_cause_offset;
561 u32 irq_mask_offset;
562 u32 unmask_all_irqs;
563
564 /*
565 * Needed on some devices that require their clocks to be enabled.
566 * These are optional: if the platform device does not have any
567 * clocks, they won't be used. Also, if the underlying hardware
568 * does not support the common clock framework (CONFIG_HAVE_CLK=n),
569 * all the clock operations become no-ops (see clk.h).
570 */
571 struct clk *clk;
572 struct clk **port_clks;
573 /*
574 * Some devices have a SATA PHY which can be enabled/disabled
575 * in order to save power. These are optional: if the platform
576 * devices does not have any phy, they won't be used.
577 */
578 struct phy **port_phys;
579 /*
580 * These consistent DMA memory pools give us guaranteed
581 * alignment for hardware-accessed data structures,
582 * and less memory waste in accomplishing the alignment.
583 */
584 struct dma_pool *crqb_pool;
585 struct dma_pool *crpb_pool;
586 struct dma_pool *sg_tbl_pool;
587};
588
589struct mv_hw_ops {
590 void (*phy_errata)(struct mv_host_priv *hpriv, void __iomem *mmio,
591 unsigned int port);
592 void (*enable_leds)(struct mv_host_priv *hpriv, void __iomem *mmio);
593 void (*read_preamp)(struct mv_host_priv *hpriv, int idx,
594 void __iomem *mmio);
595 int (*reset_hc)(struct mv_host_priv *hpriv, void __iomem *mmio,
596 unsigned int n_hc);
597 void (*reset_flash)(struct mv_host_priv *hpriv, void __iomem *mmio);
598 void (*reset_bus)(struct ata_host *host, void __iomem *mmio);
599};
600
601static int mv_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val);
602static int mv_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val);
603static int mv5_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val);
604static int mv5_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val);
605static int mv_port_start(struct ata_port *ap);
606static void mv_port_stop(struct ata_port *ap);
607static int mv_qc_defer(struct ata_queued_cmd *qc);
608static void mv_qc_prep(struct ata_queued_cmd *qc);
609static void mv_qc_prep_iie(struct ata_queued_cmd *qc);
610static unsigned int mv_qc_issue(struct ata_queued_cmd *qc);
611static int mv_hardreset(struct ata_link *link, unsigned int *class,
612 unsigned long deadline);
613static void mv_eh_freeze(struct ata_port *ap);
614static void mv_eh_thaw(struct ata_port *ap);
615static void mv6_dev_config(struct ata_device *dev);
616
617static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
618 unsigned int port);
619static void mv5_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio);
620static void mv5_read_preamp(struct mv_host_priv *hpriv, int idx,
621 void __iomem *mmio);
622static int mv5_reset_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
623 unsigned int n_hc);
624static void mv5_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio);
625static void mv5_reset_bus(struct ata_host *host, void __iomem *mmio);
626
627static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
628 unsigned int port);
629static void mv6_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio);
630static void mv6_read_preamp(struct mv_host_priv *hpriv, int idx,
631 void __iomem *mmio);
632static int mv6_reset_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
633 unsigned int n_hc);
634static void mv6_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio);
635static void mv_soc_enable_leds(struct mv_host_priv *hpriv,
636 void __iomem *mmio);
637static void mv_soc_read_preamp(struct mv_host_priv *hpriv, int idx,
638 void __iomem *mmio);
639static int mv_soc_reset_hc(struct mv_host_priv *hpriv,
640 void __iomem *mmio, unsigned int n_hc);
641static void mv_soc_reset_flash(struct mv_host_priv *hpriv,
642 void __iomem *mmio);
643static void mv_soc_reset_bus(struct ata_host *host, void __iomem *mmio);
644static void mv_soc_65n_phy_errata(struct mv_host_priv *hpriv,
645 void __iomem *mmio, unsigned int port);
646static void mv_reset_pci_bus(struct ata_host *host, void __iomem *mmio);
647static void mv_reset_channel(struct mv_host_priv *hpriv, void __iomem *mmio,
648 unsigned int port_no);
649static int mv_stop_edma(struct ata_port *ap);
650static int mv_stop_edma_engine(void __iomem *port_mmio);
651static void mv_edma_cfg(struct ata_port *ap, int want_ncq, int want_edma);
652
653static void mv_pmp_select(struct ata_port *ap, int pmp);
654static int mv_pmp_hardreset(struct ata_link *link, unsigned int *class,
655 unsigned long deadline);
656static int mv_softreset(struct ata_link *link, unsigned int *class,
657 unsigned long deadline);
658static void mv_pmp_error_handler(struct ata_port *ap);
659static void mv_process_crpb_entries(struct ata_port *ap,
660 struct mv_port_priv *pp);
661
662static void mv_sff_irq_clear(struct ata_port *ap);
663static int mv_check_atapi_dma(struct ata_queued_cmd *qc);
664static void mv_bmdma_setup(struct ata_queued_cmd *qc);
665static void mv_bmdma_start(struct ata_queued_cmd *qc);
666static void mv_bmdma_stop(struct ata_queued_cmd *qc);
667static u8 mv_bmdma_status(struct ata_port *ap);
668static u8 mv_sff_check_status(struct ata_port *ap);
669
670/* .sg_tablesize is (MV_MAX_SG_CT / 2) in the structures below
671 * because we have to allow room for worst case splitting of
672 * PRDs for 64K boundaries in mv_fill_sg().
673 */
674#ifdef CONFIG_PCI
675static struct scsi_host_template mv5_sht = {
676 ATA_BASE_SHT(DRV_NAME),
677 .sg_tablesize = MV_MAX_SG_CT / 2,
678 .dma_boundary = MV_DMA_BOUNDARY,
679};
680#endif
681static struct scsi_host_template mv6_sht = {
682 ATA_NCQ_SHT(DRV_NAME),
683 .can_queue = MV_MAX_Q_DEPTH - 1,
684 .sg_tablesize = MV_MAX_SG_CT / 2,
685 .dma_boundary = MV_DMA_BOUNDARY,
686};
687
688static struct ata_port_operations mv5_ops = {
689 .inherits = &ata_sff_port_ops,
690
691 .lost_interrupt = ATA_OP_NULL,
692
693 .qc_defer = mv_qc_defer,
694 .qc_prep = mv_qc_prep,
695 .qc_issue = mv_qc_issue,
696
697 .freeze = mv_eh_freeze,
698 .thaw = mv_eh_thaw,
699 .hardreset = mv_hardreset,
700
701 .scr_read = mv5_scr_read,
702 .scr_write = mv5_scr_write,
703
704 .port_start = mv_port_start,
705 .port_stop = mv_port_stop,
706};
707
708static struct ata_port_operations mv6_ops = {
709 .inherits = &ata_bmdma_port_ops,
710
711 .lost_interrupt = ATA_OP_NULL,
712
713 .qc_defer = mv_qc_defer,
714 .qc_prep = mv_qc_prep,
715 .qc_issue = mv_qc_issue,
716
717 .dev_config = mv6_dev_config,
718
719 .freeze = mv_eh_freeze,
720 .thaw = mv_eh_thaw,
721 .hardreset = mv_hardreset,
722 .softreset = mv_softreset,
723 .pmp_hardreset = mv_pmp_hardreset,
724 .pmp_softreset = mv_softreset,
725 .error_handler = mv_pmp_error_handler,
726
727 .scr_read = mv_scr_read,
728 .scr_write = mv_scr_write,
729
730 .sff_check_status = mv_sff_check_status,
731 .sff_irq_clear = mv_sff_irq_clear,
732 .check_atapi_dma = mv_check_atapi_dma,
733 .bmdma_setup = mv_bmdma_setup,
734 .bmdma_start = mv_bmdma_start,
735 .bmdma_stop = mv_bmdma_stop,
736 .bmdma_status = mv_bmdma_status,
737
738 .port_start = mv_port_start,
739 .port_stop = mv_port_stop,
740};
741
742static struct ata_port_operations mv_iie_ops = {
743 .inherits = &mv6_ops,
744 .dev_config = ATA_OP_NULL,
745 .qc_prep = mv_qc_prep_iie,
746};
747
748static const struct ata_port_info mv_port_info[] = {
749 { /* chip_504x */
750 .flags = MV_GEN_I_FLAGS,
751 .pio_mask = ATA_PIO4,
752 .udma_mask = ATA_UDMA6,
753 .port_ops = &mv5_ops,
754 },
755 { /* chip_508x */
756 .flags = MV_GEN_I_FLAGS | MV_FLAG_DUAL_HC,
757 .pio_mask = ATA_PIO4,
758 .udma_mask = ATA_UDMA6,
759 .port_ops = &mv5_ops,
760 },
761 { /* chip_5080 */
762 .flags = MV_GEN_I_FLAGS | MV_FLAG_DUAL_HC,
763 .pio_mask = ATA_PIO4,
764 .udma_mask = ATA_UDMA6,
765 .port_ops = &mv5_ops,
766 },
767 { /* chip_604x */
768 .flags = MV_GEN_II_FLAGS,
769 .pio_mask = ATA_PIO4,
770 .udma_mask = ATA_UDMA6,
771 .port_ops = &mv6_ops,
772 },
773 { /* chip_608x */
774 .flags = MV_GEN_II_FLAGS | MV_FLAG_DUAL_HC,
775 .pio_mask = ATA_PIO4,
776 .udma_mask = ATA_UDMA6,
777 .port_ops = &mv6_ops,
778 },
779 { /* chip_6042 */
780 .flags = MV_GEN_IIE_FLAGS,
781 .pio_mask = ATA_PIO4,
782 .udma_mask = ATA_UDMA6,
783 .port_ops = &mv_iie_ops,
784 },
785 { /* chip_7042 */
786 .flags = MV_GEN_IIE_FLAGS,
787 .pio_mask = ATA_PIO4,
788 .udma_mask = ATA_UDMA6,
789 .port_ops = &mv_iie_ops,
790 },
791 { /* chip_soc */
792 .flags = MV_GEN_IIE_FLAGS,
793 .pio_mask = ATA_PIO4,
794 .udma_mask = ATA_UDMA6,
795 .port_ops = &mv_iie_ops,
796 },
797};
798
799static const struct pci_device_id mv_pci_tbl[] = {
800 { PCI_VDEVICE(MARVELL, 0x5040), chip_504x },
801 { PCI_VDEVICE(MARVELL, 0x5041), chip_504x },
802 { PCI_VDEVICE(MARVELL, 0x5080), chip_5080 },
803 { PCI_VDEVICE(MARVELL, 0x5081), chip_508x },
804 /* RocketRAID 1720/174x have different identifiers */
805 { PCI_VDEVICE(TTI, 0x1720), chip_6042 },
806 { PCI_VDEVICE(TTI, 0x1740), chip_6042 },
807 { PCI_VDEVICE(TTI, 0x1742), chip_6042 },
808
809 { PCI_VDEVICE(MARVELL, 0x6040), chip_604x },
810 { PCI_VDEVICE(MARVELL, 0x6041), chip_604x },
811 { PCI_VDEVICE(MARVELL, 0x6042), chip_6042 },
812 { PCI_VDEVICE(MARVELL, 0x6080), chip_608x },
813 { PCI_VDEVICE(MARVELL, 0x6081), chip_608x },
814
815 { PCI_VDEVICE(ADAPTEC2, 0x0241), chip_604x },
816
817 /* Adaptec 1430SA */
818 { PCI_VDEVICE(ADAPTEC2, 0x0243), chip_7042 },
819
820 /* Marvell 7042 support */
821 { PCI_VDEVICE(MARVELL, 0x7042), chip_7042 },
822
823 /* Highpoint RocketRAID PCIe series */
824 { PCI_VDEVICE(TTI, 0x2300), chip_7042 },
825 { PCI_VDEVICE(TTI, 0x2310), chip_7042 },
826
827 { } /* terminate list */
828};
829
830static const struct mv_hw_ops mv5xxx_ops = {
831 .phy_errata = mv5_phy_errata,
832 .enable_leds = mv5_enable_leds,
833 .read_preamp = mv5_read_preamp,
834 .reset_hc = mv5_reset_hc,
835 .reset_flash = mv5_reset_flash,
836 .reset_bus = mv5_reset_bus,
837};
838
839static const struct mv_hw_ops mv6xxx_ops = {
840 .phy_errata = mv6_phy_errata,
841 .enable_leds = mv6_enable_leds,
842 .read_preamp = mv6_read_preamp,
843 .reset_hc = mv6_reset_hc,
844 .reset_flash = mv6_reset_flash,
845 .reset_bus = mv_reset_pci_bus,
846};
847
848static const struct mv_hw_ops mv_soc_ops = {
849 .phy_errata = mv6_phy_errata,
850 .enable_leds = mv_soc_enable_leds,
851 .read_preamp = mv_soc_read_preamp,
852 .reset_hc = mv_soc_reset_hc,
853 .reset_flash = mv_soc_reset_flash,
854 .reset_bus = mv_soc_reset_bus,
855};
856
857static const struct mv_hw_ops mv_soc_65n_ops = {
858 .phy_errata = mv_soc_65n_phy_errata,
859 .enable_leds = mv_soc_enable_leds,
860 .reset_hc = mv_soc_reset_hc,
861 .reset_flash = mv_soc_reset_flash,
862 .reset_bus = mv_soc_reset_bus,
863};
864
865/*
866 * Functions
867 */
868
869static inline void writelfl(unsigned long data, void __iomem *addr)
870{
871 writel(data, addr);
872 (void) readl(addr); /* flush to avoid PCI posted write */
873}
874
875static inline unsigned int mv_hc_from_port(unsigned int port)
876{
877 return port >> MV_PORT_HC_SHIFT;
878}
879
880static inline unsigned int mv_hardport_from_port(unsigned int port)
881{
882 return port & MV_PORT_MASK;
883}
884
885/*
886 * Consolidate some rather tricky bit shift calculations.
887 * This is hot-path stuff, so not a function.
888 * Simple code, with two return values, so macro rather than inline.
889 *
890 * port is the sole input, in range 0..7.
891 * shift is one output, for use with main_irq_cause / main_irq_mask registers.
892 * hardport is the other output, in range 0..3.
893 *
894 * Note that port and hardport may be the same variable in some cases.
895 */
896#define MV_PORT_TO_SHIFT_AND_HARDPORT(port, shift, hardport) \
897{ \
898 shift = mv_hc_from_port(port) * HC_SHIFT; \
899 hardport = mv_hardport_from_port(port); \
900 shift += hardport * 2; \
901}
902
903static inline void __iomem *mv_hc_base(void __iomem *base, unsigned int hc)
904{
905 return (base + SATAHC0_REG_BASE + (hc * MV_SATAHC_REG_SZ));
906}
907
908static inline void __iomem *mv_hc_base_from_port(void __iomem *base,
909 unsigned int port)
910{
911 return mv_hc_base(base, mv_hc_from_port(port));
912}
913
914static inline void __iomem *mv_port_base(void __iomem *base, unsigned int port)
915{
916 return mv_hc_base_from_port(base, port) +
917 MV_SATAHC_ARBTR_REG_SZ +
918 (mv_hardport_from_port(port) * MV_PORT_REG_SZ);
919}
920
921static void __iomem *mv5_phy_base(void __iomem *mmio, unsigned int port)
922{
923 void __iomem *hc_mmio = mv_hc_base_from_port(mmio, port);
924 unsigned long ofs = (mv_hardport_from_port(port) + 1) * 0x100UL;
925
926 return hc_mmio + ofs;
927}
928
929static inline void __iomem *mv_host_base(struct ata_host *host)
930{
931 struct mv_host_priv *hpriv = host->private_data;
932 return hpriv->base;
933}
934
935static inline void __iomem *mv_ap_base(struct ata_port *ap)
936{
937 return mv_port_base(mv_host_base(ap->host), ap->port_no);
938}
939
940static inline int mv_get_hc_count(unsigned long port_flags)
941{
942 return ((port_flags & MV_FLAG_DUAL_HC) ? 2 : 1);
943}
944
945/**
946 * mv_save_cached_regs - (re-)initialize cached port registers
947 * @ap: the port whose registers we are caching
948 *
949 * Initialize the local cache of port registers,
950 * so that reading them over and over again can
951 * be avoided on the hotter paths of this driver.
952 * This saves a few microseconds each time we switch
953 * to/from EDMA mode to perform (eg.) a drive cache flush.
954 */
955static void mv_save_cached_regs(struct ata_port *ap)
956{
957 void __iomem *port_mmio = mv_ap_base(ap);
958 struct mv_port_priv *pp = ap->private_data;
959
960 pp->cached.fiscfg = readl(port_mmio + FISCFG);
961 pp->cached.ltmode = readl(port_mmio + LTMODE);
962 pp->cached.haltcond = readl(port_mmio + EDMA_HALTCOND);
963 pp->cached.unknown_rsvd = readl(port_mmio + EDMA_UNKNOWN_RSVD);
964}
965
966/**
967 * mv_write_cached_reg - write to a cached port register
968 * @addr: hardware address of the register
969 * @old: pointer to cached value of the register
970 * @new: new value for the register
971 *
972 * Write a new value to a cached register,
973 * but only if the value is different from before.
974 */
975static inline void mv_write_cached_reg(void __iomem *addr, u32 *old, u32 new)
976{
977 if (new != *old) {
978 unsigned long laddr;
979 *old = new;
980 /*
981 * Workaround for 88SX60x1-B2 FEr SATA#13:
982 * Read-after-write is needed to prevent generating 64-bit
983 * write cycles on the PCI bus for SATA interface registers
984 * at offsets ending in 0x4 or 0xc.
985 *
986 * Looks like a lot of fuss, but it avoids an unnecessary
987 * +1 usec read-after-write delay for unaffected registers.
988 */
989 laddr = (unsigned long)addr & 0xffff;
990 if (laddr >= 0x300 && laddr <= 0x33c) {
991 laddr &= 0x000f;
992 if (laddr == 0x4 || laddr == 0xc) {
993 writelfl(new, addr); /* read after write */
994 return;
995 }
996 }
997 writel(new, addr); /* unaffected by the errata */
998 }
999}
1000
1001static void mv_set_edma_ptrs(void __iomem *port_mmio,
1002 struct mv_host_priv *hpriv,
1003 struct mv_port_priv *pp)
1004{
1005 u32 index;
1006
1007 /*
1008 * initialize request queue
1009 */
1010 pp->req_idx &= MV_MAX_Q_DEPTH_MASK; /* paranoia */
1011 index = pp->req_idx << EDMA_REQ_Q_PTR_SHIFT;
1012
1013 WARN_ON(pp->crqb_dma & 0x3ff);
1014 writel((pp->crqb_dma >> 16) >> 16, port_mmio + EDMA_REQ_Q_BASE_HI);
1015 writelfl((pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK) | index,
1016 port_mmio + EDMA_REQ_Q_IN_PTR);
1017 writelfl(index, port_mmio + EDMA_REQ_Q_OUT_PTR);
1018
1019 /*
1020 * initialize response queue
1021 */
1022 pp->resp_idx &= MV_MAX_Q_DEPTH_MASK; /* paranoia */
1023 index = pp->resp_idx << EDMA_RSP_Q_PTR_SHIFT;
1024
1025 WARN_ON(pp->crpb_dma & 0xff);
1026 writel((pp->crpb_dma >> 16) >> 16, port_mmio + EDMA_RSP_Q_BASE_HI);
1027 writelfl(index, port_mmio + EDMA_RSP_Q_IN_PTR);
1028 writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) | index,
1029 port_mmio + EDMA_RSP_Q_OUT_PTR);
1030}
1031
1032static void mv_write_main_irq_mask(u32 mask, struct mv_host_priv *hpriv)
1033{
1034 /*
1035 * When writing to the main_irq_mask in hardware,
1036 * we must ensure exclusivity between the interrupt coalescing bits
1037 * and the corresponding individual port DONE_IRQ bits.
1038 *
1039 * Note that this register is really an "IRQ enable" register,
1040 * not an "IRQ mask" register as Marvell's naming might suggest.
1041 */
1042 if (mask & (ALL_PORTS_COAL_DONE | PORTS_0_3_COAL_DONE))
1043 mask &= ~DONE_IRQ_0_3;
1044 if (mask & (ALL_PORTS_COAL_DONE | PORTS_4_7_COAL_DONE))
1045 mask &= ~DONE_IRQ_4_7;
1046 writelfl(mask, hpriv->main_irq_mask_addr);
1047}
1048
1049static void mv_set_main_irq_mask(struct ata_host *host,
1050 u32 disable_bits, u32 enable_bits)
1051{
1052 struct mv_host_priv *hpriv = host->private_data;
1053 u32 old_mask, new_mask;
1054
1055 old_mask = hpriv->main_irq_mask;
1056 new_mask = (old_mask & ~disable_bits) | enable_bits;
1057 if (new_mask != old_mask) {
1058 hpriv->main_irq_mask = new_mask;
1059 mv_write_main_irq_mask(new_mask, hpriv);
1060 }
1061}
1062
1063static void mv_enable_port_irqs(struct ata_port *ap,
1064 unsigned int port_bits)
1065{
1066 unsigned int shift, hardport, port = ap->port_no;
1067 u32 disable_bits, enable_bits;
1068
1069 MV_PORT_TO_SHIFT_AND_HARDPORT(port, shift, hardport);
1070
1071 disable_bits = (DONE_IRQ | ERR_IRQ) << shift;
1072 enable_bits = port_bits << shift;
1073 mv_set_main_irq_mask(ap->host, disable_bits, enable_bits);
1074}
1075
1076static void mv_clear_and_enable_port_irqs(struct ata_port *ap,
1077 void __iomem *port_mmio,
1078 unsigned int port_irqs)
1079{
1080 struct mv_host_priv *hpriv = ap->host->private_data;
1081 int hardport = mv_hardport_from_port(ap->port_no);
1082 void __iomem *hc_mmio = mv_hc_base_from_port(
1083 mv_host_base(ap->host), ap->port_no);
1084 u32 hc_irq_cause;
1085
1086 /* clear EDMA event indicators, if any */
1087 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE);
1088
1089 /* clear pending irq events */
1090 hc_irq_cause = ~((DEV_IRQ | DMA_IRQ) << hardport);
1091 writelfl(hc_irq_cause, hc_mmio + HC_IRQ_CAUSE);
1092
1093 /* clear FIS IRQ Cause */
1094 if (IS_GEN_IIE(hpriv))
1095 writelfl(0, port_mmio + FIS_IRQ_CAUSE);
1096
1097 mv_enable_port_irqs(ap, port_irqs);
1098}
1099
1100static void mv_set_irq_coalescing(struct ata_host *host,
1101 unsigned int count, unsigned int usecs)
1102{
1103 struct mv_host_priv *hpriv = host->private_data;
1104 void __iomem *mmio = hpriv->base, *hc_mmio;
1105 u32 coal_enable = 0;
1106 unsigned long flags;
1107 unsigned int clks, is_dual_hc = hpriv->n_ports > MV_PORTS_PER_HC;
1108 const u32 coal_disable = PORTS_0_3_COAL_DONE | PORTS_4_7_COAL_DONE |
1109 ALL_PORTS_COAL_DONE;
1110
1111 /* Disable IRQ coalescing if either threshold is zero */
1112 if (!usecs || !count) {
1113 clks = count = 0;
1114 } else {
1115 /* Respect maximum limits of the hardware */
1116 clks = usecs * COAL_CLOCKS_PER_USEC;
1117 if (clks > MAX_COAL_TIME_THRESHOLD)
1118 clks = MAX_COAL_TIME_THRESHOLD;
1119 if (count > MAX_COAL_IO_COUNT)
1120 count = MAX_COAL_IO_COUNT;
1121 }
1122
1123 spin_lock_irqsave(&host->lock, flags);
1124 mv_set_main_irq_mask(host, coal_disable, 0);
1125
1126 if (is_dual_hc && !IS_GEN_I(hpriv)) {
1127 /*
1128 * GEN_II/GEN_IIE with dual host controllers:
1129 * one set of global thresholds for the entire chip.
1130 */
1131 writel(clks, mmio + IRQ_COAL_TIME_THRESHOLD);
1132 writel(count, mmio + IRQ_COAL_IO_THRESHOLD);
1133 /* clear leftover coal IRQ bit */
1134 writel(~ALL_PORTS_COAL_IRQ, mmio + IRQ_COAL_CAUSE);
1135 if (count)
1136 coal_enable = ALL_PORTS_COAL_DONE;
1137 clks = count = 0; /* force clearing of regular regs below */
1138 }
1139
1140 /*
1141 * All chips: independent thresholds for each HC on the chip.
1142 */
1143 hc_mmio = mv_hc_base_from_port(mmio, 0);
1144 writel(clks, hc_mmio + HC_IRQ_COAL_TIME_THRESHOLD);
1145 writel(count, hc_mmio + HC_IRQ_COAL_IO_THRESHOLD);
1146 writel(~HC_COAL_IRQ, hc_mmio + HC_IRQ_CAUSE);
1147 if (count)
1148 coal_enable |= PORTS_0_3_COAL_DONE;
1149 if (is_dual_hc) {
1150 hc_mmio = mv_hc_base_from_port(mmio, MV_PORTS_PER_HC);
1151 writel(clks, hc_mmio + HC_IRQ_COAL_TIME_THRESHOLD);
1152 writel(count, hc_mmio + HC_IRQ_COAL_IO_THRESHOLD);
1153 writel(~HC_COAL_IRQ, hc_mmio + HC_IRQ_CAUSE);
1154 if (count)
1155 coal_enable |= PORTS_4_7_COAL_DONE;
1156 }
1157
1158 mv_set_main_irq_mask(host, 0, coal_enable);
1159 spin_unlock_irqrestore(&host->lock, flags);
1160}
1161
1162/**
1163 * mv_start_edma - Enable eDMA engine
1164 * @base: port base address
1165 * @pp: port private data
1166 *
1167 * Verify the local cache of the eDMA state is accurate with a
1168 * WARN_ON.
1169 *
1170 * LOCKING:
1171 * Inherited from caller.
1172 */
1173static void mv_start_edma(struct ata_port *ap, void __iomem *port_mmio,
1174 struct mv_port_priv *pp, u8 protocol)
1175{
1176 int want_ncq = (protocol == ATA_PROT_NCQ);
1177
1178 if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
1179 int using_ncq = ((pp->pp_flags & MV_PP_FLAG_NCQ_EN) != 0);
1180 if (want_ncq != using_ncq)
1181 mv_stop_edma(ap);
1182 }
1183 if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN)) {
1184 struct mv_host_priv *hpriv = ap->host->private_data;
1185
1186 mv_edma_cfg(ap, want_ncq, 1);
1187
1188 mv_set_edma_ptrs(port_mmio, hpriv, pp);
1189 mv_clear_and_enable_port_irqs(ap, port_mmio, DONE_IRQ|ERR_IRQ);
1190
1191 writelfl(EDMA_EN, port_mmio + EDMA_CMD);
1192 pp->pp_flags |= MV_PP_FLAG_EDMA_EN;
1193 }
1194}
1195
1196static void mv_wait_for_edma_empty_idle(struct ata_port *ap)
1197{
1198 void __iomem *port_mmio = mv_ap_base(ap);
1199 const u32 empty_idle = (EDMA_STATUS_CACHE_EMPTY | EDMA_STATUS_IDLE);
1200 const int per_loop = 5, timeout = (15 * 1000 / per_loop);
1201 int i;
1202
1203 /*
1204 * Wait for the EDMA engine to finish transactions in progress.
1205 * No idea what a good "timeout" value might be, but measurements
1206 * indicate that it often requires hundreds of microseconds
1207 * with two drives in-use. So we use the 15msec value above
1208 * as a rough guess at what even more drives might require.
1209 */
1210 for (i = 0; i < timeout; ++i) {
1211 u32 edma_stat = readl(port_mmio + EDMA_STATUS);
1212 if ((edma_stat & empty_idle) == empty_idle)
1213 break;
1214 udelay(per_loop);
1215 }
1216 /* ata_port_info(ap, "%s: %u+ usecs\n", __func__, i); */
1217}
1218
1219/**
1220 * mv_stop_edma_engine - Disable eDMA engine
1221 * @port_mmio: io base address
1222 *
1223 * LOCKING:
1224 * Inherited from caller.
1225 */
1226static int mv_stop_edma_engine(void __iomem *port_mmio)
1227{
1228 int i;
1229
1230 /* Disable eDMA. The disable bit auto clears. */
1231 writelfl(EDMA_DS, port_mmio + EDMA_CMD);
1232
1233 /* Wait for the chip to confirm eDMA is off. */
1234 for (i = 10000; i > 0; i--) {
1235 u32 reg = readl(port_mmio + EDMA_CMD);
1236 if (!(reg & EDMA_EN))
1237 return 0;
1238 udelay(10);
1239 }
1240 return -EIO;
1241}
1242
1243static int mv_stop_edma(struct ata_port *ap)
1244{
1245 void __iomem *port_mmio = mv_ap_base(ap);
1246 struct mv_port_priv *pp = ap->private_data;
1247 int err = 0;
1248
1249 if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN))
1250 return 0;
1251 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
1252 mv_wait_for_edma_empty_idle(ap);
1253 if (mv_stop_edma_engine(port_mmio)) {
1254 ata_port_err(ap, "Unable to stop eDMA\n");
1255 err = -EIO;
1256 }
1257 mv_edma_cfg(ap, 0, 0);
1258 return err;
1259}
1260
1261#ifdef ATA_DEBUG
1262static void mv_dump_mem(void __iomem *start, unsigned bytes)
1263{
1264 int b, w;
1265 for (b = 0; b < bytes; ) {
1266 DPRINTK("%p: ", start + b);
1267 for (w = 0; b < bytes && w < 4; w++) {
1268 printk("%08x ", readl(start + b));
1269 b += sizeof(u32);
1270 }
1271 printk("\n");
1272 }
1273}
1274#endif
1275#if defined(ATA_DEBUG) || defined(CONFIG_PCI)
1276static void mv_dump_pci_cfg(struct pci_dev *pdev, unsigned bytes)
1277{
1278#ifdef ATA_DEBUG
1279 int b, w;
1280 u32 dw;
1281 for (b = 0; b < bytes; ) {
1282 DPRINTK("%02x: ", b);
1283 for (w = 0; b < bytes && w < 4; w++) {
1284 (void) pci_read_config_dword(pdev, b, &dw);
1285 printk("%08x ", dw);
1286 b += sizeof(u32);
1287 }
1288 printk("\n");
1289 }
1290#endif
1291}
1292#endif
1293static void mv_dump_all_regs(void __iomem *mmio_base, int port,
1294 struct pci_dev *pdev)
1295{
1296#ifdef ATA_DEBUG
1297 void __iomem *hc_base = mv_hc_base(mmio_base,
1298 port >> MV_PORT_HC_SHIFT);
1299 void __iomem *port_base;
1300 int start_port, num_ports, p, start_hc, num_hcs, hc;
1301
1302 if (0 > port) {
1303 start_hc = start_port = 0;
1304 num_ports = 8; /* shld be benign for 4 port devs */
1305 num_hcs = 2;
1306 } else {
1307 start_hc = port >> MV_PORT_HC_SHIFT;
1308 start_port = port;
1309 num_ports = num_hcs = 1;
1310 }
1311 DPRINTK("All registers for port(s) %u-%u:\n", start_port,
1312 num_ports > 1 ? num_ports - 1 : start_port);
1313
1314 if (NULL != pdev) {
1315 DPRINTK("PCI config space regs:\n");
1316 mv_dump_pci_cfg(pdev, 0x68);
1317 }
1318 DPRINTK("PCI regs:\n");
1319 mv_dump_mem(mmio_base+0xc00, 0x3c);
1320 mv_dump_mem(mmio_base+0xd00, 0x34);
1321 mv_dump_mem(mmio_base+0xf00, 0x4);
1322 mv_dump_mem(mmio_base+0x1d00, 0x6c);
1323 for (hc = start_hc; hc < start_hc + num_hcs; hc++) {
1324 hc_base = mv_hc_base(mmio_base, hc);
1325 DPRINTK("HC regs (HC %i):\n", hc);
1326 mv_dump_mem(hc_base, 0x1c);
1327 }
1328 for (p = start_port; p < start_port + num_ports; p++) {
1329 port_base = mv_port_base(mmio_base, p);
1330 DPRINTK("EDMA regs (port %i):\n", p);
1331 mv_dump_mem(port_base, 0x54);
1332 DPRINTK("SATA regs (port %i):\n", p);
1333 mv_dump_mem(port_base+0x300, 0x60);
1334 }
1335#endif
1336}
1337
1338static unsigned int mv_scr_offset(unsigned int sc_reg_in)
1339{
1340 unsigned int ofs;
1341
1342 switch (sc_reg_in) {
1343 case SCR_STATUS:
1344 case SCR_CONTROL:
1345 case SCR_ERROR:
1346 ofs = SATA_STATUS + (sc_reg_in * sizeof(u32));
1347 break;
1348 case SCR_ACTIVE:
1349 ofs = SATA_ACTIVE; /* active is not with the others */
1350 break;
1351 default:
1352 ofs = 0xffffffffU;
1353 break;
1354 }
1355 return ofs;
1356}
1357
1358static int mv_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val)
1359{
1360 unsigned int ofs = mv_scr_offset(sc_reg_in);
1361
1362 if (ofs != 0xffffffffU) {
1363 *val = readl(mv_ap_base(link->ap) + ofs);
1364 return 0;
1365 } else
1366 return -EINVAL;
1367}
1368
1369static int mv_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val)
1370{
1371 unsigned int ofs = mv_scr_offset(sc_reg_in);
1372
1373 if (ofs != 0xffffffffU) {
1374 void __iomem *addr = mv_ap_base(link->ap) + ofs;
1375 struct mv_host_priv *hpriv = link->ap->host->private_data;
1376 if (sc_reg_in == SCR_CONTROL) {
1377 /*
1378 * Workaround for 88SX60x1 FEr SATA#26:
1379 *
1380 * COMRESETs have to take care not to accidentally
1381 * put the drive to sleep when writing SCR_CONTROL.
1382 * Setting bits 12..15 prevents this problem.
1383 *
1384 * So if we see an outbound COMMRESET, set those bits.
1385 * Ditto for the followup write that clears the reset.
1386 *
1387 * The proprietary driver does this for
1388 * all chip versions, and so do we.
1389 */
1390 if ((val & 0xf) == 1 || (readl(addr) & 0xf) == 1)
1391 val |= 0xf000;
1392
1393 if (hpriv->hp_flags & MV_HP_FIX_LP_PHY_CTL) {
1394 void __iomem *lp_phy_addr =
1395 mv_ap_base(link->ap) + LP_PHY_CTL;
1396 /*
1397 * Set PHY speed according to SControl speed.
1398 */
1399 u32 lp_phy_val =
1400 LP_PHY_CTL_PIN_PU_PLL |
1401 LP_PHY_CTL_PIN_PU_RX |
1402 LP_PHY_CTL_PIN_PU_TX;
1403
1404 if ((val & 0xf0) != 0x10)
1405 lp_phy_val |=
1406 LP_PHY_CTL_GEN_TX_3G |
1407 LP_PHY_CTL_GEN_RX_3G;
1408
1409 writelfl(lp_phy_val, lp_phy_addr);
1410 }
1411 }
1412 writelfl(val, addr);
1413 return 0;
1414 } else
1415 return -EINVAL;
1416}
1417
1418static void mv6_dev_config(struct ata_device *adev)
1419{
1420 /*
1421 * Deal with Gen-II ("mv6") hardware quirks/restrictions:
1422 *
1423 * Gen-II does not support NCQ over a port multiplier
1424 * (no FIS-based switching).
1425 */
1426 if (adev->flags & ATA_DFLAG_NCQ) {
1427 if (sata_pmp_attached(adev->link->ap)) {
1428 adev->flags &= ~ATA_DFLAG_NCQ;
1429 ata_dev_info(adev,
1430 "NCQ disabled for command-based switching\n");
1431 }
1432 }
1433}
1434
1435static int mv_qc_defer(struct ata_queued_cmd *qc)
1436{
1437 struct ata_link *link = qc->dev->link;
1438 struct ata_port *ap = link->ap;
1439 struct mv_port_priv *pp = ap->private_data;
1440
1441 /*
1442 * Don't allow new commands if we're in a delayed EH state
1443 * for NCQ and/or FIS-based switching.
1444 */
1445 if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH)
1446 return ATA_DEFER_PORT;
1447
1448 /* PIO commands need exclusive link: no other commands [DMA or PIO]
1449 * can run concurrently.
1450 * set excl_link when we want to send a PIO command in DMA mode
1451 * or a non-NCQ command in NCQ mode.
1452 * When we receive a command from that link, and there are no
1453 * outstanding commands, mark a flag to clear excl_link and let
1454 * the command go through.
1455 */
1456 if (unlikely(ap->excl_link)) {
1457 if (link == ap->excl_link) {
1458 if (ap->nr_active_links)
1459 return ATA_DEFER_PORT;
1460 qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
1461 return 0;
1462 } else
1463 return ATA_DEFER_PORT;
1464 }
1465
1466 /*
1467 * If the port is completely idle, then allow the new qc.
1468 */
1469 if (ap->nr_active_links == 0)
1470 return 0;
1471
1472 /*
1473 * The port is operating in host queuing mode (EDMA) with NCQ
1474 * enabled, allow multiple NCQ commands. EDMA also allows
1475 * queueing multiple DMA commands but libata core currently
1476 * doesn't allow it.
1477 */
1478 if ((pp->pp_flags & MV_PP_FLAG_EDMA_EN) &&
1479 (pp->pp_flags & MV_PP_FLAG_NCQ_EN)) {
1480 if (ata_is_ncq(qc->tf.protocol))
1481 return 0;
1482 else {
1483 ap->excl_link = link;
1484 return ATA_DEFER_PORT;
1485 }
1486 }
1487
1488 return ATA_DEFER_PORT;
1489}
1490
1491static void mv_config_fbs(struct ata_port *ap, int want_ncq, int want_fbs)
1492{
1493 struct mv_port_priv *pp = ap->private_data;
1494 void __iomem *port_mmio;
1495
1496 u32 fiscfg, *old_fiscfg = &pp->cached.fiscfg;
1497 u32 ltmode, *old_ltmode = &pp->cached.ltmode;
1498 u32 haltcond, *old_haltcond = &pp->cached.haltcond;
1499
1500 ltmode = *old_ltmode & ~LTMODE_BIT8;
1501 haltcond = *old_haltcond | EDMA_ERR_DEV;
1502
1503 if (want_fbs) {
1504 fiscfg = *old_fiscfg | FISCFG_SINGLE_SYNC;
1505 ltmode = *old_ltmode | LTMODE_BIT8;
1506 if (want_ncq)
1507 haltcond &= ~EDMA_ERR_DEV;
1508 else
1509 fiscfg |= FISCFG_WAIT_DEV_ERR;
1510 } else {
1511 fiscfg = *old_fiscfg & ~(FISCFG_SINGLE_SYNC | FISCFG_WAIT_DEV_ERR);
1512 }
1513
1514 port_mmio = mv_ap_base(ap);
1515 mv_write_cached_reg(port_mmio + FISCFG, old_fiscfg, fiscfg);
1516 mv_write_cached_reg(port_mmio + LTMODE, old_ltmode, ltmode);
1517 mv_write_cached_reg(port_mmio + EDMA_HALTCOND, old_haltcond, haltcond);
1518}
1519
1520static void mv_60x1_errata_sata25(struct ata_port *ap, int want_ncq)
1521{
1522 struct mv_host_priv *hpriv = ap->host->private_data;
1523 u32 old, new;
1524
1525 /* workaround for 88SX60x1 FEr SATA#25 (part 1) */
1526 old = readl(hpriv->base + GPIO_PORT_CTL);
1527 if (want_ncq)
1528 new = old | (1 << 22);
1529 else
1530 new = old & ~(1 << 22);
1531 if (new != old)
1532 writel(new, hpriv->base + GPIO_PORT_CTL);
1533}
1534
1535/**
1536 * mv_bmdma_enable - set a magic bit on GEN_IIE to allow bmdma
1537 * @ap: Port being initialized
1538 *
1539 * There are two DMA modes on these chips: basic DMA, and EDMA.
1540 *
1541 * Bit-0 of the "EDMA RESERVED" register enables/disables use
1542 * of basic DMA on the GEN_IIE versions of the chips.
1543 *
1544 * This bit survives EDMA resets, and must be set for basic DMA
1545 * to function, and should be cleared when EDMA is active.
1546 */
1547static void mv_bmdma_enable_iie(struct ata_port *ap, int enable_bmdma)
1548{
1549 struct mv_port_priv *pp = ap->private_data;
1550 u32 new, *old = &pp->cached.unknown_rsvd;
1551
1552 if (enable_bmdma)
1553 new = *old | 1;
1554 else
1555 new = *old & ~1;
1556 mv_write_cached_reg(mv_ap_base(ap) + EDMA_UNKNOWN_RSVD, old, new);
1557}
1558
1559/*
1560 * SOC chips have an issue whereby the HDD LEDs don't always blink
1561 * during I/O when NCQ is enabled. Enabling a special "LED blink" mode
1562 * of the SOC takes care of it, generating a steady blink rate when
1563 * any drive on the chip is active.
1564 *
1565 * Unfortunately, the blink mode is a global hardware setting for the SOC,
1566 * so we must use it whenever at least one port on the SOC has NCQ enabled.
1567 *
1568 * We turn "LED blink" off when NCQ is not in use anywhere, because the normal
1569 * LED operation works then, and provides better (more accurate) feedback.
1570 *
1571 * Note that this code assumes that an SOC never has more than one HC onboard.
1572 */
1573static void mv_soc_led_blink_enable(struct ata_port *ap)
1574{
1575 struct ata_host *host = ap->host;
1576 struct mv_host_priv *hpriv = host->private_data;
1577 void __iomem *hc_mmio;
1578 u32 led_ctrl;
1579
1580 if (hpriv->hp_flags & MV_HP_QUIRK_LED_BLINK_EN)
1581 return;
1582 hpriv->hp_flags |= MV_HP_QUIRK_LED_BLINK_EN;
1583 hc_mmio = mv_hc_base_from_port(mv_host_base(host), ap->port_no);
1584 led_ctrl = readl(hc_mmio + SOC_LED_CTRL);
1585 writel(led_ctrl | SOC_LED_CTRL_BLINK, hc_mmio + SOC_LED_CTRL);
1586}
1587
1588static void mv_soc_led_blink_disable(struct ata_port *ap)
1589{
1590 struct ata_host *host = ap->host;
1591 struct mv_host_priv *hpriv = host->private_data;
1592 void __iomem *hc_mmio;
1593 u32 led_ctrl;
1594 unsigned int port;
1595
1596 if (!(hpriv->hp_flags & MV_HP_QUIRK_LED_BLINK_EN))
1597 return;
1598
1599 /* disable led-blink only if no ports are using NCQ */
1600 for (port = 0; port < hpriv->n_ports; port++) {
1601 struct ata_port *this_ap = host->ports[port];
1602 struct mv_port_priv *pp = this_ap->private_data;
1603
1604 if (pp->pp_flags & MV_PP_FLAG_NCQ_EN)
1605 return;
1606 }
1607
1608 hpriv->hp_flags &= ~MV_HP_QUIRK_LED_BLINK_EN;
1609 hc_mmio = mv_hc_base_from_port(mv_host_base(host), ap->port_no);
1610 led_ctrl = readl(hc_mmio + SOC_LED_CTRL);
1611 writel(led_ctrl & ~SOC_LED_CTRL_BLINK, hc_mmio + SOC_LED_CTRL);
1612}
1613
1614static void mv_edma_cfg(struct ata_port *ap, int want_ncq, int want_edma)
1615{
1616 u32 cfg;
1617 struct mv_port_priv *pp = ap->private_data;
1618 struct mv_host_priv *hpriv = ap->host->private_data;
1619 void __iomem *port_mmio = mv_ap_base(ap);
1620
1621 /* set up non-NCQ EDMA configuration */
1622 cfg = EDMA_CFG_Q_DEPTH; /* always 0x1f for *all* chips */
1623 pp->pp_flags &=
1624 ~(MV_PP_FLAG_FBS_EN | MV_PP_FLAG_NCQ_EN | MV_PP_FLAG_FAKE_ATA_BUSY);
1625
1626 if (IS_GEN_I(hpriv))
1627 cfg |= (1 << 8); /* enab config burst size mask */
1628
1629 else if (IS_GEN_II(hpriv)) {
1630 cfg |= EDMA_CFG_RD_BRST_EXT | EDMA_CFG_WR_BUFF_LEN;
1631 mv_60x1_errata_sata25(ap, want_ncq);
1632
1633 } else if (IS_GEN_IIE(hpriv)) {
1634 int want_fbs = sata_pmp_attached(ap);
1635 /*
1636 * Possible future enhancement:
1637 *
1638 * The chip can use FBS with non-NCQ, if we allow it,
1639 * But first we need to have the error handling in place
1640 * for this mode (datasheet section 7.3.15.4.2.3).
1641 * So disallow non-NCQ FBS for now.
1642 */
1643 want_fbs &= want_ncq;
1644
1645 mv_config_fbs(ap, want_ncq, want_fbs);
1646
1647 if (want_fbs) {
1648 pp->pp_flags |= MV_PP_FLAG_FBS_EN;
1649 cfg |= EDMA_CFG_EDMA_FBS; /* FIS-based switching */
1650 }
1651
1652 cfg |= (1 << 23); /* do not mask PM field in rx'd FIS */
1653 if (want_edma) {
1654 cfg |= (1 << 22); /* enab 4-entry host queue cache */
1655 if (!IS_SOC(hpriv))
1656 cfg |= (1 << 18); /* enab early completion */
1657 }
1658 if (hpriv->hp_flags & MV_HP_CUT_THROUGH)
1659 cfg |= (1 << 17); /* enab cut-thru (dis stor&forwrd) */
1660 mv_bmdma_enable_iie(ap, !want_edma);
1661
1662 if (IS_SOC(hpriv)) {
1663 if (want_ncq)
1664 mv_soc_led_blink_enable(ap);
1665 else
1666 mv_soc_led_blink_disable(ap);
1667 }
1668 }
1669
1670 if (want_ncq) {
1671 cfg |= EDMA_CFG_NCQ;
1672 pp->pp_flags |= MV_PP_FLAG_NCQ_EN;
1673 }
1674
1675 writelfl(cfg, port_mmio + EDMA_CFG);
1676}
1677
1678static void mv_port_free_dma_mem(struct ata_port *ap)
1679{
1680 struct mv_host_priv *hpriv = ap->host->private_data;
1681 struct mv_port_priv *pp = ap->private_data;
1682 int tag;
1683
1684 if (pp->crqb) {
1685 dma_pool_free(hpriv->crqb_pool, pp->crqb, pp->crqb_dma);
1686 pp->crqb = NULL;
1687 }
1688 if (pp->crpb) {
1689 dma_pool_free(hpriv->crpb_pool, pp->crpb, pp->crpb_dma);
1690 pp->crpb = NULL;
1691 }
1692 /*
1693 * For GEN_I, there's no NCQ, so we have only a single sg_tbl.
1694 * For later hardware, we have one unique sg_tbl per NCQ tag.
1695 */
1696 for (tag = 0; tag < MV_MAX_Q_DEPTH; ++tag) {
1697 if (pp->sg_tbl[tag]) {
1698 if (tag == 0 || !IS_GEN_I(hpriv))
1699 dma_pool_free(hpriv->sg_tbl_pool,
1700 pp->sg_tbl[tag],
1701 pp->sg_tbl_dma[tag]);
1702 pp->sg_tbl[tag] = NULL;
1703 }
1704 }
1705}
1706
1707/**
1708 * mv_port_start - Port specific init/start routine.
1709 * @ap: ATA channel to manipulate
1710 *
1711 * Allocate and point to DMA memory, init port private memory,
1712 * zero indices.
1713 *
1714 * LOCKING:
1715 * Inherited from caller.
1716 */
1717static int mv_port_start(struct ata_port *ap)
1718{
1719 struct device *dev = ap->host->dev;
1720 struct mv_host_priv *hpriv = ap->host->private_data;
1721 struct mv_port_priv *pp;
1722 unsigned long flags;
1723 int tag;
1724
1725 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1726 if (!pp)
1727 return -ENOMEM;
1728 ap->private_data = pp;
1729
1730 pp->crqb = dma_pool_zalloc(hpriv->crqb_pool, GFP_KERNEL, &pp->crqb_dma);
1731 if (!pp->crqb)
1732 return -ENOMEM;
1733
1734 pp->crpb = dma_pool_zalloc(hpriv->crpb_pool, GFP_KERNEL, &pp->crpb_dma);
1735 if (!pp->crpb)
1736 goto out_port_free_dma_mem;
1737
1738 /* 6041/6081 Rev. "C0" (and newer) are okay with async notify */
1739 if (hpriv->hp_flags & MV_HP_ERRATA_60X1C0)
1740 ap->flags |= ATA_FLAG_AN;
1741 /*
1742 * For GEN_I, there's no NCQ, so we only allocate a single sg_tbl.
1743 * For later hardware, we need one unique sg_tbl per NCQ tag.
1744 */
1745 for (tag = 0; tag < MV_MAX_Q_DEPTH; ++tag) {
1746 if (tag == 0 || !IS_GEN_I(hpriv)) {
1747 pp->sg_tbl[tag] = dma_pool_alloc(hpriv->sg_tbl_pool,
1748 GFP_KERNEL, &pp->sg_tbl_dma[tag]);
1749 if (!pp->sg_tbl[tag])
1750 goto out_port_free_dma_mem;
1751 } else {
1752 pp->sg_tbl[tag] = pp->sg_tbl[0];
1753 pp->sg_tbl_dma[tag] = pp->sg_tbl_dma[0];
1754 }
1755 }
1756
1757 spin_lock_irqsave(ap->lock, flags);
1758 mv_save_cached_regs(ap);
1759 mv_edma_cfg(ap, 0, 0);
1760 spin_unlock_irqrestore(ap->lock, flags);
1761
1762 return 0;
1763
1764out_port_free_dma_mem:
1765 mv_port_free_dma_mem(ap);
1766 return -ENOMEM;
1767}
1768
1769/**
1770 * mv_port_stop - Port specific cleanup/stop routine.
1771 * @ap: ATA channel to manipulate
1772 *
1773 * Stop DMA, cleanup port memory.
1774 *
1775 * LOCKING:
1776 * This routine uses the host lock to protect the DMA stop.
1777 */
1778static void mv_port_stop(struct ata_port *ap)
1779{
1780 unsigned long flags;
1781
1782 spin_lock_irqsave(ap->lock, flags);
1783 mv_stop_edma(ap);
1784 mv_enable_port_irqs(ap, 0);
1785 spin_unlock_irqrestore(ap->lock, flags);
1786 mv_port_free_dma_mem(ap);
1787}
1788
1789/**
1790 * mv_fill_sg - Fill out the Marvell ePRD (scatter gather) entries
1791 * @qc: queued command whose SG list to source from
1792 *
1793 * Populate the SG list and mark the last entry.
1794 *
1795 * LOCKING:
1796 * Inherited from caller.
1797 */
1798static void mv_fill_sg(struct ata_queued_cmd *qc)
1799{
1800 struct mv_port_priv *pp = qc->ap->private_data;
1801 struct scatterlist *sg;
1802 struct mv_sg *mv_sg, *last_sg = NULL;
1803 unsigned int si;
1804
1805 mv_sg = pp->sg_tbl[qc->hw_tag];
1806 for_each_sg(qc->sg, sg, qc->n_elem, si) {
1807 dma_addr_t addr = sg_dma_address(sg);
1808 u32 sg_len = sg_dma_len(sg);
1809
1810 while (sg_len) {
1811 u32 offset = addr & 0xffff;
1812 u32 len = sg_len;
1813
1814 if (offset + len > 0x10000)
1815 len = 0x10000 - offset;
1816
1817 mv_sg->addr = cpu_to_le32(addr & 0xffffffff);
1818 mv_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
1819 mv_sg->flags_size = cpu_to_le32(len & 0xffff);
1820 mv_sg->reserved = 0;
1821
1822 sg_len -= len;
1823 addr += len;
1824
1825 last_sg = mv_sg;
1826 mv_sg++;
1827 }
1828 }
1829
1830 if (likely(last_sg))
1831 last_sg->flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL);
1832 mb(); /* ensure data structure is visible to the chipset */
1833}
1834
1835static void mv_crqb_pack_cmd(__le16 *cmdw, u8 data, u8 addr, unsigned last)
1836{
1837 u16 tmp = data | (addr << CRQB_CMD_ADDR_SHIFT) | CRQB_CMD_CS |
1838 (last ? CRQB_CMD_LAST : 0);
1839 *cmdw = cpu_to_le16(tmp);
1840}
1841
1842/**
1843 * mv_sff_irq_clear - Clear hardware interrupt after DMA.
1844 * @ap: Port associated with this ATA transaction.
1845 *
1846 * We need this only for ATAPI bmdma transactions,
1847 * as otherwise we experience spurious interrupts
1848 * after libata-sff handles the bmdma interrupts.
1849 */
1850static void mv_sff_irq_clear(struct ata_port *ap)
1851{
1852 mv_clear_and_enable_port_irqs(ap, mv_ap_base(ap), ERR_IRQ);
1853}
1854
1855/**
1856 * mv_check_atapi_dma - Filter ATAPI cmds which are unsuitable for DMA.
1857 * @qc: queued command to check for chipset/DMA compatibility.
1858 *
1859 * The bmdma engines cannot handle speculative data sizes
1860 * (bytecount under/over flow). So only allow DMA for
1861 * data transfer commands with known data sizes.
1862 *
1863 * LOCKING:
1864 * Inherited from caller.
1865 */
1866static int mv_check_atapi_dma(struct ata_queued_cmd *qc)
1867{
1868 struct scsi_cmnd *scmd = qc->scsicmd;
1869
1870 if (scmd) {
1871 switch (scmd->cmnd[0]) {
1872 case READ_6:
1873 case READ_10:
1874 case READ_12:
1875 case WRITE_6:
1876 case WRITE_10:
1877 case WRITE_12:
1878 case GPCMD_READ_CD:
1879 case GPCMD_SEND_DVD_STRUCTURE:
1880 case GPCMD_SEND_CUE_SHEET:
1881 return 0; /* DMA is safe */
1882 }
1883 }
1884 return -EOPNOTSUPP; /* use PIO instead */
1885}
1886
1887/**
1888 * mv_bmdma_setup - Set up BMDMA transaction
1889 * @qc: queued command to prepare DMA for.
1890 *
1891 * LOCKING:
1892 * Inherited from caller.
1893 */
1894static void mv_bmdma_setup(struct ata_queued_cmd *qc)
1895{
1896 struct ata_port *ap = qc->ap;
1897 void __iomem *port_mmio = mv_ap_base(ap);
1898 struct mv_port_priv *pp = ap->private_data;
1899
1900 mv_fill_sg(qc);
1901
1902 /* clear all DMA cmd bits */
1903 writel(0, port_mmio + BMDMA_CMD);
1904
1905 /* load PRD table addr. */
1906 writel((pp->sg_tbl_dma[qc->hw_tag] >> 16) >> 16,
1907 port_mmio + BMDMA_PRD_HIGH);
1908 writelfl(pp->sg_tbl_dma[qc->hw_tag],
1909 port_mmio + BMDMA_PRD_LOW);
1910
1911 /* issue r/w command */
1912 ap->ops->sff_exec_command(ap, &qc->tf);
1913}
1914
1915/**
1916 * mv_bmdma_start - Start a BMDMA transaction
1917 * @qc: queued command to start DMA on.
1918 *
1919 * LOCKING:
1920 * Inherited from caller.
1921 */
1922static void mv_bmdma_start(struct ata_queued_cmd *qc)
1923{
1924 struct ata_port *ap = qc->ap;
1925 void __iomem *port_mmio = mv_ap_base(ap);
1926 unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
1927 u32 cmd = (rw ? 0 : ATA_DMA_WR) | ATA_DMA_START;
1928
1929 /* start host DMA transaction */
1930 writelfl(cmd, port_mmio + BMDMA_CMD);
1931}
1932
1933/**
1934 * mv_bmdma_stop - Stop BMDMA transfer
1935 * @qc: queued command to stop DMA on.
1936 *
1937 * Clears the ATA_DMA_START flag in the bmdma control register
1938 *
1939 * LOCKING:
1940 * Inherited from caller.
1941 */
1942static void mv_bmdma_stop_ap(struct ata_port *ap)
1943{
1944 void __iomem *port_mmio = mv_ap_base(ap);
1945 u32 cmd;
1946
1947 /* clear start/stop bit */
1948 cmd = readl(port_mmio + BMDMA_CMD);
1949 if (cmd & ATA_DMA_START) {
1950 cmd &= ~ATA_DMA_START;
1951 writelfl(cmd, port_mmio + BMDMA_CMD);
1952
1953 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
1954 ata_sff_dma_pause(ap);
1955 }
1956}
1957
1958static void mv_bmdma_stop(struct ata_queued_cmd *qc)
1959{
1960 mv_bmdma_stop_ap(qc->ap);
1961}
1962
1963/**
1964 * mv_bmdma_status - Read BMDMA status
1965 * @ap: port for which to retrieve DMA status.
1966 *
1967 * Read and return equivalent of the sff BMDMA status register.
1968 *
1969 * LOCKING:
1970 * Inherited from caller.
1971 */
1972static u8 mv_bmdma_status(struct ata_port *ap)
1973{
1974 void __iomem *port_mmio = mv_ap_base(ap);
1975 u32 reg, status;
1976
1977 /*
1978 * Other bits are valid only if ATA_DMA_ACTIVE==0,
1979 * and the ATA_DMA_INTR bit doesn't exist.
1980 */
1981 reg = readl(port_mmio + BMDMA_STATUS);
1982 if (reg & ATA_DMA_ACTIVE)
1983 status = ATA_DMA_ACTIVE;
1984 else if (reg & ATA_DMA_ERR)
1985 status = (reg & ATA_DMA_ERR) | ATA_DMA_INTR;
1986 else {
1987 /*
1988 * Just because DMA_ACTIVE is 0 (DMA completed),
1989 * this does _not_ mean the device is "done".
1990 * So we should not yet be signalling ATA_DMA_INTR
1991 * in some cases. Eg. DSM/TRIM, and perhaps others.
1992 */
1993 mv_bmdma_stop_ap(ap);
1994 if (ioread8(ap->ioaddr.altstatus_addr) & ATA_BUSY)
1995 status = 0;
1996 else
1997 status = ATA_DMA_INTR;
1998 }
1999 return status;
2000}
2001
2002static void mv_rw_multi_errata_sata24(struct ata_queued_cmd *qc)
2003{
2004 struct ata_taskfile *tf = &qc->tf;
2005 /*
2006 * Workaround for 88SX60x1 FEr SATA#24.
2007 *
2008 * Chip may corrupt WRITEs if multi_count >= 4kB.
2009 * Note that READs are unaffected.
2010 *
2011 * It's not clear if this errata really means "4K bytes",
2012 * or if it always happens for multi_count > 7
2013 * regardless of device sector_size.
2014 *
2015 * So, for safety, any write with multi_count > 7
2016 * gets converted here into a regular PIO write instead:
2017 */
2018 if ((tf->flags & ATA_TFLAG_WRITE) && is_multi_taskfile(tf)) {
2019 if (qc->dev->multi_count > 7) {
2020 switch (tf->command) {
2021 case ATA_CMD_WRITE_MULTI:
2022 tf->command = ATA_CMD_PIO_WRITE;
2023 break;
2024 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2025 tf->flags &= ~ATA_TFLAG_FUA; /* ugh */
2026 /* fall through */
2027 case ATA_CMD_WRITE_MULTI_EXT:
2028 tf->command = ATA_CMD_PIO_WRITE_EXT;
2029 break;
2030 }
2031 }
2032 }
2033}
2034
2035/**
2036 * mv_qc_prep - Host specific command preparation.
2037 * @qc: queued command to prepare
2038 *
2039 * This routine simply redirects to the general purpose routine
2040 * if command is not DMA. Else, it handles prep of the CRQB
2041 * (command request block), does some sanity checking, and calls
2042 * the SG load routine.
2043 *
2044 * LOCKING:
2045 * Inherited from caller.
2046 */
2047static void mv_qc_prep(struct ata_queued_cmd *qc)
2048{
2049 struct ata_port *ap = qc->ap;
2050 struct mv_port_priv *pp = ap->private_data;
2051 __le16 *cw;
2052 struct ata_taskfile *tf = &qc->tf;
2053 u16 flags = 0;
2054 unsigned in_index;
2055
2056 switch (tf->protocol) {
2057 case ATA_PROT_DMA:
2058 if (tf->command == ATA_CMD_DSM)
2059 return;
2060 /* fall-thru */
2061 case ATA_PROT_NCQ:
2062 break; /* continue below */
2063 case ATA_PROT_PIO:
2064 mv_rw_multi_errata_sata24(qc);
2065 return;
2066 default:
2067 return;
2068 }
2069
2070 /* Fill in command request block
2071 */
2072 if (!(tf->flags & ATA_TFLAG_WRITE))
2073 flags |= CRQB_FLAG_READ;
2074 WARN_ON(MV_MAX_Q_DEPTH <= qc->hw_tag);
2075 flags |= qc->hw_tag << CRQB_TAG_SHIFT;
2076 flags |= (qc->dev->link->pmp & 0xf) << CRQB_PMP_SHIFT;
2077
2078 /* get current queue index from software */
2079 in_index = pp->req_idx;
2080
2081 pp->crqb[in_index].sg_addr =
2082 cpu_to_le32(pp->sg_tbl_dma[qc->hw_tag] & 0xffffffff);
2083 pp->crqb[in_index].sg_addr_hi =
2084 cpu_to_le32((pp->sg_tbl_dma[qc->hw_tag] >> 16) >> 16);
2085 pp->crqb[in_index].ctrl_flags = cpu_to_le16(flags);
2086
2087 cw = &pp->crqb[in_index].ata_cmd[0];
2088
2089 /* Sadly, the CRQB cannot accommodate all registers--there are
2090 * only 11 bytes...so we must pick and choose required
2091 * registers based on the command. So, we drop feature and
2092 * hob_feature for [RW] DMA commands, but they are needed for
2093 * NCQ. NCQ will drop hob_nsect, which is not needed there
2094 * (nsect is used only for the tag; feat/hob_feat hold true nsect).
2095 */
2096 switch (tf->command) {
2097 case ATA_CMD_READ:
2098 case ATA_CMD_READ_EXT:
2099 case ATA_CMD_WRITE:
2100 case ATA_CMD_WRITE_EXT:
2101 case ATA_CMD_WRITE_FUA_EXT:
2102 mv_crqb_pack_cmd(cw++, tf->hob_nsect, ATA_REG_NSECT, 0);
2103 break;
2104 case ATA_CMD_FPDMA_READ:
2105 case ATA_CMD_FPDMA_WRITE:
2106 mv_crqb_pack_cmd(cw++, tf->hob_feature, ATA_REG_FEATURE, 0);
2107 mv_crqb_pack_cmd(cw++, tf->feature, ATA_REG_FEATURE, 0);
2108 break;
2109 default:
2110 /* The only other commands EDMA supports in non-queued and
2111 * non-NCQ mode are: [RW] STREAM DMA and W DMA FUA EXT, none
2112 * of which are defined/used by Linux. If we get here, this
2113 * driver needs work.
2114 *
2115 * FIXME: modify libata to give qc_prep a return value and
2116 * return error here.
2117 */
2118 BUG_ON(tf->command);
2119 break;
2120 }
2121 mv_crqb_pack_cmd(cw++, tf->nsect, ATA_REG_NSECT, 0);
2122 mv_crqb_pack_cmd(cw++, tf->hob_lbal, ATA_REG_LBAL, 0);
2123 mv_crqb_pack_cmd(cw++, tf->lbal, ATA_REG_LBAL, 0);
2124 mv_crqb_pack_cmd(cw++, tf->hob_lbam, ATA_REG_LBAM, 0);
2125 mv_crqb_pack_cmd(cw++, tf->lbam, ATA_REG_LBAM, 0);
2126 mv_crqb_pack_cmd(cw++, tf->hob_lbah, ATA_REG_LBAH, 0);
2127 mv_crqb_pack_cmd(cw++, tf->lbah, ATA_REG_LBAH, 0);
2128 mv_crqb_pack_cmd(cw++, tf->device, ATA_REG_DEVICE, 0);
2129 mv_crqb_pack_cmd(cw++, tf->command, ATA_REG_CMD, 1); /* last */
2130
2131 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
2132 return;
2133 mv_fill_sg(qc);
2134}
2135
2136/**
2137 * mv_qc_prep_iie - Host specific command preparation.
2138 * @qc: queued command to prepare
2139 *
2140 * This routine simply redirects to the general purpose routine
2141 * if command is not DMA. Else, it handles prep of the CRQB
2142 * (command request block), does some sanity checking, and calls
2143 * the SG load routine.
2144 *
2145 * LOCKING:
2146 * Inherited from caller.
2147 */
2148static void mv_qc_prep_iie(struct ata_queued_cmd *qc)
2149{
2150 struct ata_port *ap = qc->ap;
2151 struct mv_port_priv *pp = ap->private_data;
2152 struct mv_crqb_iie *crqb;
2153 struct ata_taskfile *tf = &qc->tf;
2154 unsigned in_index;
2155 u32 flags = 0;
2156
2157 if ((tf->protocol != ATA_PROT_DMA) &&
2158 (tf->protocol != ATA_PROT_NCQ))
2159 return;
2160 if (tf->command == ATA_CMD_DSM)
2161 return; /* use bmdma for this */
2162
2163 /* Fill in Gen IIE command request block */
2164 if (!(tf->flags & ATA_TFLAG_WRITE))
2165 flags |= CRQB_FLAG_READ;
2166
2167 WARN_ON(MV_MAX_Q_DEPTH <= qc->hw_tag);
2168 flags |= qc->hw_tag << CRQB_TAG_SHIFT;
2169 flags |= qc->hw_tag << CRQB_HOSTQ_SHIFT;
2170 flags |= (qc->dev->link->pmp & 0xf) << CRQB_PMP_SHIFT;
2171
2172 /* get current queue index from software */
2173 in_index = pp->req_idx;
2174
2175 crqb = (struct mv_crqb_iie *) &pp->crqb[in_index];
2176 crqb->addr = cpu_to_le32(pp->sg_tbl_dma[qc->hw_tag] & 0xffffffff);
2177 crqb->addr_hi = cpu_to_le32((pp->sg_tbl_dma[qc->hw_tag] >> 16) >> 16);
2178 crqb->flags = cpu_to_le32(flags);
2179
2180 crqb->ata_cmd[0] = cpu_to_le32(
2181 (tf->command << 16) |
2182 (tf->feature << 24)
2183 );
2184 crqb->ata_cmd[1] = cpu_to_le32(
2185 (tf->lbal << 0) |
2186 (tf->lbam << 8) |
2187 (tf->lbah << 16) |
2188 (tf->device << 24)
2189 );
2190 crqb->ata_cmd[2] = cpu_to_le32(
2191 (tf->hob_lbal << 0) |
2192 (tf->hob_lbam << 8) |
2193 (tf->hob_lbah << 16) |
2194 (tf->hob_feature << 24)
2195 );
2196 crqb->ata_cmd[3] = cpu_to_le32(
2197 (tf->nsect << 0) |
2198 (tf->hob_nsect << 8)
2199 );
2200
2201 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
2202 return;
2203 mv_fill_sg(qc);
2204}
2205
2206/**
2207 * mv_sff_check_status - fetch device status, if valid
2208 * @ap: ATA port to fetch status from
2209 *
2210 * When using command issue via mv_qc_issue_fis(),
2211 * the initial ATA_BUSY state does not show up in the
2212 * ATA status (shadow) register. This can confuse libata!
2213 *
2214 * So we have a hook here to fake ATA_BUSY for that situation,
2215 * until the first time a BUSY, DRQ, or ERR bit is seen.
2216 *
2217 * The rest of the time, it simply returns the ATA status register.
2218 */
2219static u8 mv_sff_check_status(struct ata_port *ap)
2220{
2221 u8 stat = ioread8(ap->ioaddr.status_addr);
2222 struct mv_port_priv *pp = ap->private_data;
2223
2224 if (pp->pp_flags & MV_PP_FLAG_FAKE_ATA_BUSY) {
2225 if (stat & (ATA_BUSY | ATA_DRQ | ATA_ERR))
2226 pp->pp_flags &= ~MV_PP_FLAG_FAKE_ATA_BUSY;
2227 else
2228 stat = ATA_BUSY;
2229 }
2230 return stat;
2231}
2232
2233/**
2234 * mv_send_fis - Send a FIS, using the "Vendor-Unique FIS" register
2235 * @fis: fis to be sent
2236 * @nwords: number of 32-bit words in the fis
2237 */
2238static unsigned int mv_send_fis(struct ata_port *ap, u32 *fis, int nwords)
2239{
2240 void __iomem *port_mmio = mv_ap_base(ap);
2241 u32 ifctl, old_ifctl, ifstat;
2242 int i, timeout = 200, final_word = nwords - 1;
2243
2244 /* Initiate FIS transmission mode */
2245 old_ifctl = readl(port_mmio + SATA_IFCTL);
2246 ifctl = 0x100 | (old_ifctl & 0xf);
2247 writelfl(ifctl, port_mmio + SATA_IFCTL);
2248
2249 /* Send all words of the FIS except for the final word */
2250 for (i = 0; i < final_word; ++i)
2251 writel(fis[i], port_mmio + VENDOR_UNIQUE_FIS);
2252
2253 /* Flag end-of-transmission, and then send the final word */
2254 writelfl(ifctl | 0x200, port_mmio + SATA_IFCTL);
2255 writelfl(fis[final_word], port_mmio + VENDOR_UNIQUE_FIS);
2256
2257 /*
2258 * Wait for FIS transmission to complete.
2259 * This typically takes just a single iteration.
2260 */
2261 do {
2262 ifstat = readl(port_mmio + SATA_IFSTAT);
2263 } while (!(ifstat & 0x1000) && --timeout);
2264
2265 /* Restore original port configuration */
2266 writelfl(old_ifctl, port_mmio + SATA_IFCTL);
2267
2268 /* See if it worked */
2269 if ((ifstat & 0x3000) != 0x1000) {
2270 ata_port_warn(ap, "%s transmission error, ifstat=%08x\n",
2271 __func__, ifstat);
2272 return AC_ERR_OTHER;
2273 }
2274 return 0;
2275}
2276
2277/**
2278 * mv_qc_issue_fis - Issue a command directly as a FIS
2279 * @qc: queued command to start
2280 *
2281 * Note that the ATA shadow registers are not updated
2282 * after command issue, so the device will appear "READY"
2283 * if polled, even while it is BUSY processing the command.
2284 *
2285 * So we use a status hook to fake ATA_BUSY until the drive changes state.
2286 *
2287 * Note: we don't get updated shadow regs on *completion*
2288 * of non-data commands. So avoid sending them via this function,
2289 * as they will appear to have completed immediately.
2290 *
2291 * GEN_IIE has special registers that we could get the result tf from,
2292 * but earlier chipsets do not. For now, we ignore those registers.
2293 */
2294static unsigned int mv_qc_issue_fis(struct ata_queued_cmd *qc)
2295{
2296 struct ata_port *ap = qc->ap;
2297 struct mv_port_priv *pp = ap->private_data;
2298 struct ata_link *link = qc->dev->link;
2299 u32 fis[5];
2300 int err = 0;
2301
2302 ata_tf_to_fis(&qc->tf, link->pmp, 1, (void *)fis);
2303 err = mv_send_fis(ap, fis, ARRAY_SIZE(fis));
2304 if (err)
2305 return err;
2306
2307 switch (qc->tf.protocol) {
2308 case ATAPI_PROT_PIO:
2309 pp->pp_flags |= MV_PP_FLAG_FAKE_ATA_BUSY;
2310 /* fall through */
2311 case ATAPI_PROT_NODATA:
2312 ap->hsm_task_state = HSM_ST_FIRST;
2313 break;
2314 case ATA_PROT_PIO:
2315 pp->pp_flags |= MV_PP_FLAG_FAKE_ATA_BUSY;
2316 if (qc->tf.flags & ATA_TFLAG_WRITE)
2317 ap->hsm_task_state = HSM_ST_FIRST;
2318 else
2319 ap->hsm_task_state = HSM_ST;
2320 break;
2321 default:
2322 ap->hsm_task_state = HSM_ST_LAST;
2323 break;
2324 }
2325
2326 if (qc->tf.flags & ATA_TFLAG_POLLING)
2327 ata_sff_queue_pio_task(link, 0);
2328 return 0;
2329}
2330
2331/**
2332 * mv_qc_issue - Initiate a command to the host
2333 * @qc: queued command to start
2334 *
2335 * This routine simply redirects to the general purpose routine
2336 * if command is not DMA. Else, it sanity checks our local
2337 * caches of the request producer/consumer indices then enables
2338 * DMA and bumps the request producer index.
2339 *
2340 * LOCKING:
2341 * Inherited from caller.
2342 */
2343static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
2344{
2345 static int limit_warnings = 10;
2346 struct ata_port *ap = qc->ap;
2347 void __iomem *port_mmio = mv_ap_base(ap);
2348 struct mv_port_priv *pp = ap->private_data;
2349 u32 in_index;
2350 unsigned int port_irqs;
2351
2352 pp->pp_flags &= ~MV_PP_FLAG_FAKE_ATA_BUSY; /* paranoia */
2353
2354 switch (qc->tf.protocol) {
2355 case ATA_PROT_DMA:
2356 if (qc->tf.command == ATA_CMD_DSM) {
2357 if (!ap->ops->bmdma_setup) /* no bmdma on GEN_I */
2358 return AC_ERR_OTHER;
2359 break; /* use bmdma for this */
2360 }
2361 /* fall thru */
2362 case ATA_PROT_NCQ:
2363 mv_start_edma(ap, port_mmio, pp, qc->tf.protocol);
2364 pp->req_idx = (pp->req_idx + 1) & MV_MAX_Q_DEPTH_MASK;
2365 in_index = pp->req_idx << EDMA_REQ_Q_PTR_SHIFT;
2366
2367 /* Write the request in pointer to kick the EDMA to life */
2368 writelfl((pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK) | in_index,
2369 port_mmio + EDMA_REQ_Q_IN_PTR);
2370 return 0;
2371
2372 case ATA_PROT_PIO:
2373 /*
2374 * Errata SATA#16, SATA#24: warn if multiple DRQs expected.
2375 *
2376 * Someday, we might implement special polling workarounds
2377 * for these, but it all seems rather unnecessary since we
2378 * normally use only DMA for commands which transfer more
2379 * than a single block of data.
2380 *
2381 * Much of the time, this could just work regardless.
2382 * So for now, just log the incident, and allow the attempt.
2383 */
2384 if (limit_warnings > 0 && (qc->nbytes / qc->sect_size) > 1) {
2385 --limit_warnings;
2386 ata_link_warn(qc->dev->link, DRV_NAME
2387 ": attempting PIO w/multiple DRQ: "
2388 "this may fail due to h/w errata\n");
2389 }
2390 /* fall through */
2391 case ATA_PROT_NODATA:
2392 case ATAPI_PROT_PIO:
2393 case ATAPI_PROT_NODATA:
2394 if (ap->flags & ATA_FLAG_PIO_POLLING)
2395 qc->tf.flags |= ATA_TFLAG_POLLING;
2396 break;
2397 }
2398
2399 if (qc->tf.flags & ATA_TFLAG_POLLING)
2400 port_irqs = ERR_IRQ; /* mask device interrupt when polling */
2401 else
2402 port_irqs = ERR_IRQ | DONE_IRQ; /* unmask all interrupts */
2403
2404 /*
2405 * We're about to send a non-EDMA capable command to the
2406 * port. Turn off EDMA so there won't be problems accessing
2407 * shadow block, etc registers.
2408 */
2409 mv_stop_edma(ap);
2410 mv_clear_and_enable_port_irqs(ap, mv_ap_base(ap), port_irqs);
2411 mv_pmp_select(ap, qc->dev->link->pmp);
2412
2413 if (qc->tf.command == ATA_CMD_READ_LOG_EXT) {
2414 struct mv_host_priv *hpriv = ap->host->private_data;
2415 /*
2416 * Workaround for 88SX60x1 FEr SATA#25 (part 2).
2417 *
2418 * After any NCQ error, the READ_LOG_EXT command
2419 * from libata-eh *must* use mv_qc_issue_fis().
2420 * Otherwise it might fail, due to chip errata.
2421 *
2422 * Rather than special-case it, we'll just *always*
2423 * use this method here for READ_LOG_EXT, making for
2424 * easier testing.
2425 */
2426 if (IS_GEN_II(hpriv))
2427 return mv_qc_issue_fis(qc);
2428 }
2429 return ata_bmdma_qc_issue(qc);
2430}
2431
2432static struct ata_queued_cmd *mv_get_active_qc(struct ata_port *ap)
2433{
2434 struct mv_port_priv *pp = ap->private_data;
2435 struct ata_queued_cmd *qc;
2436
2437 if (pp->pp_flags & MV_PP_FLAG_NCQ_EN)
2438 return NULL;
2439 qc = ata_qc_from_tag(ap, ap->link.active_tag);
2440 if (qc && !(qc->tf.flags & ATA_TFLAG_POLLING))
2441 return qc;
2442 return NULL;
2443}
2444
2445static void mv_pmp_error_handler(struct ata_port *ap)
2446{
2447 unsigned int pmp, pmp_map;
2448 struct mv_port_priv *pp = ap->private_data;
2449
2450 if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH) {
2451 /*
2452 * Perform NCQ error analysis on failed PMPs
2453 * before we freeze the port entirely.
2454 *
2455 * The failed PMPs are marked earlier by mv_pmp_eh_prep().
2456 */
2457 pmp_map = pp->delayed_eh_pmp_map;
2458 pp->pp_flags &= ~MV_PP_FLAG_DELAYED_EH;
2459 for (pmp = 0; pmp_map != 0; pmp++) {
2460 unsigned int this_pmp = (1 << pmp);
2461 if (pmp_map & this_pmp) {
2462 struct ata_link *link = &ap->pmp_link[pmp];
2463 pmp_map &= ~this_pmp;
2464 ata_eh_analyze_ncq_error(link);
2465 }
2466 }
2467 ata_port_freeze(ap);
2468 }
2469 sata_pmp_error_handler(ap);
2470}
2471
2472static unsigned int mv_get_err_pmp_map(struct ata_port *ap)
2473{
2474 void __iomem *port_mmio = mv_ap_base(ap);
2475
2476 return readl(port_mmio + SATA_TESTCTL) >> 16;
2477}
2478
2479static void mv_pmp_eh_prep(struct ata_port *ap, unsigned int pmp_map)
2480{
2481 unsigned int pmp;
2482
2483 /*
2484 * Initialize EH info for PMPs which saw device errors
2485 */
2486 for (pmp = 0; pmp_map != 0; pmp++) {
2487 unsigned int this_pmp = (1 << pmp);
2488 if (pmp_map & this_pmp) {
2489 struct ata_link *link = &ap->pmp_link[pmp];
2490 struct ata_eh_info *ehi = &link->eh_info;
2491
2492 pmp_map &= ~this_pmp;
2493 ata_ehi_clear_desc(ehi);
2494 ata_ehi_push_desc(ehi, "dev err");
2495 ehi->err_mask |= AC_ERR_DEV;
2496 ehi->action |= ATA_EH_RESET;
2497 ata_link_abort(link);
2498 }
2499 }
2500}
2501
2502static int mv_req_q_empty(struct ata_port *ap)
2503{
2504 void __iomem *port_mmio = mv_ap_base(ap);
2505 u32 in_ptr, out_ptr;
2506
2507 in_ptr = (readl(port_mmio + EDMA_REQ_Q_IN_PTR)
2508 >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK;
2509 out_ptr = (readl(port_mmio + EDMA_REQ_Q_OUT_PTR)
2510 >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK;
2511 return (in_ptr == out_ptr); /* 1 == queue_is_empty */
2512}
2513
2514static int mv_handle_fbs_ncq_dev_err(struct ata_port *ap)
2515{
2516 struct mv_port_priv *pp = ap->private_data;
2517 int failed_links;
2518 unsigned int old_map, new_map;
2519
2520 /*
2521 * Device error during FBS+NCQ operation:
2522 *
2523 * Set a port flag to prevent further I/O being enqueued.
2524 * Leave the EDMA running to drain outstanding commands from this port.
2525 * Perform the post-mortem/EH only when all responses are complete.
2526 * Follow recovery sequence from 6042/7042 datasheet (7.3.15.4.2.2).
2527 */
2528 if (!(pp->pp_flags & MV_PP_FLAG_DELAYED_EH)) {
2529 pp->pp_flags |= MV_PP_FLAG_DELAYED_EH;
2530 pp->delayed_eh_pmp_map = 0;
2531 }
2532 old_map = pp->delayed_eh_pmp_map;
2533 new_map = old_map | mv_get_err_pmp_map(ap);
2534
2535 if (old_map != new_map) {
2536 pp->delayed_eh_pmp_map = new_map;
2537 mv_pmp_eh_prep(ap, new_map & ~old_map);
2538 }
2539 failed_links = hweight16(new_map);
2540
2541 ata_port_info(ap,
2542 "%s: pmp_map=%04x qc_map=%04llx failed_links=%d nr_active_links=%d\n",
2543 __func__, pp->delayed_eh_pmp_map,
2544 ap->qc_active, failed_links,
2545 ap->nr_active_links);
2546
2547 if (ap->nr_active_links <= failed_links && mv_req_q_empty(ap)) {
2548 mv_process_crpb_entries(ap, pp);
2549 mv_stop_edma(ap);
2550 mv_eh_freeze(ap);
2551 ata_port_info(ap, "%s: done\n", __func__);
2552 return 1; /* handled */
2553 }
2554 ata_port_info(ap, "%s: waiting\n", __func__);
2555 return 1; /* handled */
2556}
2557
2558static int mv_handle_fbs_non_ncq_dev_err(struct ata_port *ap)
2559{
2560 /*
2561 * Possible future enhancement:
2562 *
2563 * FBS+non-NCQ operation is not yet implemented.
2564 * See related notes in mv_edma_cfg().
2565 *
2566 * Device error during FBS+non-NCQ operation:
2567 *
2568 * We need to snapshot the shadow registers for each failed command.
2569 * Follow recovery sequence from 6042/7042 datasheet (7.3.15.4.2.3).
2570 */
2571 return 0; /* not handled */
2572}
2573
2574static int mv_handle_dev_err(struct ata_port *ap, u32 edma_err_cause)
2575{
2576 struct mv_port_priv *pp = ap->private_data;
2577
2578 if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN))
2579 return 0; /* EDMA was not active: not handled */
2580 if (!(pp->pp_flags & MV_PP_FLAG_FBS_EN))
2581 return 0; /* FBS was not active: not handled */
2582
2583 if (!(edma_err_cause & EDMA_ERR_DEV))
2584 return 0; /* non DEV error: not handled */
2585 edma_err_cause &= ~EDMA_ERR_IRQ_TRANSIENT;
2586 if (edma_err_cause & ~(EDMA_ERR_DEV | EDMA_ERR_SELF_DIS))
2587 return 0; /* other problems: not handled */
2588
2589 if (pp->pp_flags & MV_PP_FLAG_NCQ_EN) {
2590 /*
2591 * EDMA should NOT have self-disabled for this case.
2592 * If it did, then something is wrong elsewhere,
2593 * and we cannot handle it here.
2594 */
2595 if (edma_err_cause & EDMA_ERR_SELF_DIS) {
2596 ata_port_warn(ap, "%s: err_cause=0x%x pp_flags=0x%x\n",
2597 __func__, edma_err_cause, pp->pp_flags);
2598 return 0; /* not handled */
2599 }
2600 return mv_handle_fbs_ncq_dev_err(ap);
2601 } else {
2602 /*
2603 * EDMA should have self-disabled for this case.
2604 * If it did not, then something is wrong elsewhere,
2605 * and we cannot handle it here.
2606 */
2607 if (!(edma_err_cause & EDMA_ERR_SELF_DIS)) {
2608 ata_port_warn(ap, "%s: err_cause=0x%x pp_flags=0x%x\n",
2609 __func__, edma_err_cause, pp->pp_flags);
2610 return 0; /* not handled */
2611 }
2612 return mv_handle_fbs_non_ncq_dev_err(ap);
2613 }
2614 return 0; /* not handled */
2615}
2616
2617static void mv_unexpected_intr(struct ata_port *ap, int edma_was_enabled)
2618{
2619 struct ata_eh_info *ehi = &ap->link.eh_info;
2620 char *when = "idle";
2621
2622 ata_ehi_clear_desc(ehi);
2623 if (edma_was_enabled) {
2624 when = "EDMA enabled";
2625 } else {
2626 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
2627 if (qc && (qc->tf.flags & ATA_TFLAG_POLLING))
2628 when = "polling";
2629 }
2630 ata_ehi_push_desc(ehi, "unexpected device interrupt while %s", when);
2631 ehi->err_mask |= AC_ERR_OTHER;
2632 ehi->action |= ATA_EH_RESET;
2633 ata_port_freeze(ap);
2634}
2635
2636/**
2637 * mv_err_intr - Handle error interrupts on the port
2638 * @ap: ATA channel to manipulate
2639 *
2640 * Most cases require a full reset of the chip's state machine,
2641 * which also performs a COMRESET.
2642 * Also, if the port disabled DMA, update our cached copy to match.
2643 *
2644 * LOCKING:
2645 * Inherited from caller.
2646 */
2647static void mv_err_intr(struct ata_port *ap)
2648{
2649 void __iomem *port_mmio = mv_ap_base(ap);
2650 u32 edma_err_cause, eh_freeze_mask, serr = 0;
2651 u32 fis_cause = 0;
2652 struct mv_port_priv *pp = ap->private_data;
2653 struct mv_host_priv *hpriv = ap->host->private_data;
2654 unsigned int action = 0, err_mask = 0;
2655 struct ata_eh_info *ehi = &ap->link.eh_info;
2656 struct ata_queued_cmd *qc;
2657 int abort = 0;
2658
2659 /*
2660 * Read and clear the SError and err_cause bits.
2661 * For GenIIe, if EDMA_ERR_TRANS_IRQ_7 is set, we also must read/clear
2662 * the FIS_IRQ_CAUSE register before clearing edma_err_cause.
2663 */
2664 sata_scr_read(&ap->link, SCR_ERROR, &serr);
2665 sata_scr_write_flush(&ap->link, SCR_ERROR, serr);
2666
2667 edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE);
2668 if (IS_GEN_IIE(hpriv) && (edma_err_cause & EDMA_ERR_TRANS_IRQ_7)) {
2669 fis_cause = readl(port_mmio + FIS_IRQ_CAUSE);
2670 writelfl(~fis_cause, port_mmio + FIS_IRQ_CAUSE);
2671 }
2672 writelfl(~edma_err_cause, port_mmio + EDMA_ERR_IRQ_CAUSE);
2673
2674 if (edma_err_cause & EDMA_ERR_DEV) {
2675 /*
2676 * Device errors during FIS-based switching operation
2677 * require special handling.
2678 */
2679 if (mv_handle_dev_err(ap, edma_err_cause))
2680 return;
2681 }
2682
2683 qc = mv_get_active_qc(ap);
2684 ata_ehi_clear_desc(ehi);
2685 ata_ehi_push_desc(ehi, "edma_err_cause=%08x pp_flags=%08x",
2686 edma_err_cause, pp->pp_flags);
2687
2688 if (IS_GEN_IIE(hpriv) && (edma_err_cause & EDMA_ERR_TRANS_IRQ_7)) {
2689 ata_ehi_push_desc(ehi, "fis_cause=%08x", fis_cause);
2690 if (fis_cause & FIS_IRQ_CAUSE_AN) {
2691 u32 ec = edma_err_cause &
2692 ~(EDMA_ERR_TRANS_IRQ_7 | EDMA_ERR_IRQ_TRANSIENT);
2693 sata_async_notification(ap);
2694 if (!ec)
2695 return; /* Just an AN; no need for the nukes */
2696 ata_ehi_push_desc(ehi, "SDB notify");
2697 }
2698 }
2699 /*
2700 * All generations share these EDMA error cause bits:
2701 */
2702 if (edma_err_cause & EDMA_ERR_DEV) {
2703 err_mask |= AC_ERR_DEV;
2704 action |= ATA_EH_RESET;
2705 ata_ehi_push_desc(ehi, "dev error");
2706 }
2707 if (edma_err_cause & (EDMA_ERR_D_PAR | EDMA_ERR_PRD_PAR |
2708 EDMA_ERR_CRQB_PAR | EDMA_ERR_CRPB_PAR |
2709 EDMA_ERR_INTRL_PAR)) {
2710 err_mask |= AC_ERR_ATA_BUS;
2711 action |= ATA_EH_RESET;
2712 ata_ehi_push_desc(ehi, "parity error");
2713 }
2714 if (edma_err_cause & (EDMA_ERR_DEV_DCON | EDMA_ERR_DEV_CON)) {
2715 ata_ehi_hotplugged(ehi);
2716 ata_ehi_push_desc(ehi, edma_err_cause & EDMA_ERR_DEV_DCON ?
2717 "dev disconnect" : "dev connect");
2718 action |= ATA_EH_RESET;
2719 }
2720
2721 /*
2722 * Gen-I has a different SELF_DIS bit,
2723 * different FREEZE bits, and no SERR bit:
2724 */
2725 if (IS_GEN_I(hpriv)) {
2726 eh_freeze_mask = EDMA_EH_FREEZE_5;
2727 if (edma_err_cause & EDMA_ERR_SELF_DIS_5) {
2728 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
2729 ata_ehi_push_desc(ehi, "EDMA self-disable");
2730 }
2731 } else {
2732 eh_freeze_mask = EDMA_EH_FREEZE;
2733 if (edma_err_cause & EDMA_ERR_SELF_DIS) {
2734 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
2735 ata_ehi_push_desc(ehi, "EDMA self-disable");
2736 }
2737 if (edma_err_cause & EDMA_ERR_SERR) {
2738 ata_ehi_push_desc(ehi, "SError=%08x", serr);
2739 err_mask |= AC_ERR_ATA_BUS;
2740 action |= ATA_EH_RESET;
2741 }
2742 }
2743
2744 if (!err_mask) {
2745 err_mask = AC_ERR_OTHER;
2746 action |= ATA_EH_RESET;
2747 }
2748
2749 ehi->serror |= serr;
2750 ehi->action |= action;
2751
2752 if (qc)
2753 qc->err_mask |= err_mask;
2754 else
2755 ehi->err_mask |= err_mask;
2756
2757 if (err_mask == AC_ERR_DEV) {
2758 /*
2759 * Cannot do ata_port_freeze() here,
2760 * because it would kill PIO access,
2761 * which is needed for further diagnosis.
2762 */
2763 mv_eh_freeze(ap);
2764 abort = 1;
2765 } else if (edma_err_cause & eh_freeze_mask) {
2766 /*
2767 * Note to self: ata_port_freeze() calls ata_port_abort()
2768 */
2769 ata_port_freeze(ap);
2770 } else {
2771 abort = 1;
2772 }
2773
2774 if (abort) {
2775 if (qc)
2776 ata_link_abort(qc->dev->link);
2777 else
2778 ata_port_abort(ap);
2779 }
2780}
2781
2782static bool mv_process_crpb_response(struct ata_port *ap,
2783 struct mv_crpb *response, unsigned int tag, int ncq_enabled)
2784{
2785 u8 ata_status;
2786 u16 edma_status = le16_to_cpu(response->flags);
2787
2788 /*
2789 * edma_status from a response queue entry:
2790 * LSB is from EDMA_ERR_IRQ_CAUSE (non-NCQ only).
2791 * MSB is saved ATA status from command completion.
2792 */
2793 if (!ncq_enabled) {
2794 u8 err_cause = edma_status & 0xff & ~EDMA_ERR_DEV;
2795 if (err_cause) {
2796 /*
2797 * Error will be seen/handled by
2798 * mv_err_intr(). So do nothing at all here.
2799 */
2800 return false;
2801 }
2802 }
2803 ata_status = edma_status >> CRPB_FLAG_STATUS_SHIFT;
2804 if (!ac_err_mask(ata_status))
2805 return true;
2806 /* else: leave it for mv_err_intr() */
2807 return false;
2808}
2809
2810static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp)
2811{
2812 void __iomem *port_mmio = mv_ap_base(ap);
2813 struct mv_host_priv *hpriv = ap->host->private_data;
2814 u32 in_index;
2815 bool work_done = false;
2816 u32 done_mask = 0;
2817 int ncq_enabled = (pp->pp_flags & MV_PP_FLAG_NCQ_EN);
2818
2819 /* Get the hardware queue position index */
2820 in_index = (readl(port_mmio + EDMA_RSP_Q_IN_PTR)
2821 >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK;
2822
2823 /* Process new responses from since the last time we looked */
2824 while (in_index != pp->resp_idx) {
2825 unsigned int tag;
2826 struct mv_crpb *response = &pp->crpb[pp->resp_idx];
2827
2828 pp->resp_idx = (pp->resp_idx + 1) & MV_MAX_Q_DEPTH_MASK;
2829
2830 if (IS_GEN_I(hpriv)) {
2831 /* 50xx: no NCQ, only one command active at a time */
2832 tag = ap->link.active_tag;
2833 } else {
2834 /* Gen II/IIE: get command tag from CRPB entry */
2835 tag = le16_to_cpu(response->id) & 0x1f;
2836 }
2837 if (mv_process_crpb_response(ap, response, tag, ncq_enabled))
2838 done_mask |= 1 << tag;
2839 work_done = true;
2840 }
2841
2842 if (work_done) {
2843 ata_qc_complete_multiple(ap, ap->qc_active ^ done_mask);
2844
2845 /* Update the software queue position index in hardware */
2846 writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) |
2847 (pp->resp_idx << EDMA_RSP_Q_PTR_SHIFT),
2848 port_mmio + EDMA_RSP_Q_OUT_PTR);
2849 }
2850}
2851
2852static void mv_port_intr(struct ata_port *ap, u32 port_cause)
2853{
2854 struct mv_port_priv *pp;
2855 int edma_was_enabled;
2856
2857 /*
2858 * Grab a snapshot of the EDMA_EN flag setting,
2859 * so that we have a consistent view for this port,
2860 * even if something we call of our routines changes it.
2861 */
2862 pp = ap->private_data;
2863 edma_was_enabled = (pp->pp_flags & MV_PP_FLAG_EDMA_EN);
2864 /*
2865 * Process completed CRPB response(s) before other events.
2866 */
2867 if (edma_was_enabled && (port_cause & DONE_IRQ)) {
2868 mv_process_crpb_entries(ap, pp);
2869 if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH)
2870 mv_handle_fbs_ncq_dev_err(ap);
2871 }
2872 /*
2873 * Handle chip-reported errors, or continue on to handle PIO.
2874 */
2875 if (unlikely(port_cause & ERR_IRQ)) {
2876 mv_err_intr(ap);
2877 } else if (!edma_was_enabled) {
2878 struct ata_queued_cmd *qc = mv_get_active_qc(ap);
2879 if (qc)
2880 ata_bmdma_port_intr(ap, qc);
2881 else
2882 mv_unexpected_intr(ap, edma_was_enabled);
2883 }
2884}
2885
2886/**
2887 * mv_host_intr - Handle all interrupts on the given host controller
2888 * @host: host specific structure
2889 * @main_irq_cause: Main interrupt cause register for the chip.
2890 *
2891 * LOCKING:
2892 * Inherited from caller.
2893 */
2894static int mv_host_intr(struct ata_host *host, u32 main_irq_cause)
2895{
2896 struct mv_host_priv *hpriv = host->private_data;
2897 void __iomem *mmio = hpriv->base, *hc_mmio;
2898 unsigned int handled = 0, port;
2899
2900 /* If asserted, clear the "all ports" IRQ coalescing bit */
2901 if (main_irq_cause & ALL_PORTS_COAL_DONE)
2902 writel(~ALL_PORTS_COAL_IRQ, mmio + IRQ_COAL_CAUSE);
2903
2904 for (port = 0; port < hpriv->n_ports; port++) {
2905 struct ata_port *ap = host->ports[port];
2906 unsigned int p, shift, hardport, port_cause;
2907
2908 MV_PORT_TO_SHIFT_AND_HARDPORT(port, shift, hardport);
2909 /*
2910 * Each hc within the host has its own hc_irq_cause register,
2911 * where the interrupting ports bits get ack'd.
2912 */
2913 if (hardport == 0) { /* first port on this hc ? */
2914 u32 hc_cause = (main_irq_cause >> shift) & HC0_IRQ_PEND;
2915 u32 port_mask, ack_irqs;
2916 /*
2917 * Skip this entire hc if nothing pending for any ports
2918 */
2919 if (!hc_cause) {
2920 port += MV_PORTS_PER_HC - 1;
2921 continue;
2922 }
2923 /*
2924 * We don't need/want to read the hc_irq_cause register,
2925 * because doing so hurts performance, and
2926 * main_irq_cause already gives us everything we need.
2927 *
2928 * But we do have to *write* to the hc_irq_cause to ack
2929 * the ports that we are handling this time through.
2930 *
2931 * This requires that we create a bitmap for those
2932 * ports which interrupted us, and use that bitmap
2933 * to ack (only) those ports via hc_irq_cause.
2934 */
2935 ack_irqs = 0;
2936 if (hc_cause & PORTS_0_3_COAL_DONE)
2937 ack_irqs = HC_COAL_IRQ;
2938 for (p = 0; p < MV_PORTS_PER_HC; ++p) {
2939 if ((port + p) >= hpriv->n_ports)
2940 break;
2941 port_mask = (DONE_IRQ | ERR_IRQ) << (p * 2);
2942 if (hc_cause & port_mask)
2943 ack_irqs |= (DMA_IRQ | DEV_IRQ) << p;
2944 }
2945 hc_mmio = mv_hc_base_from_port(mmio, port);
2946 writelfl(~ack_irqs, hc_mmio + HC_IRQ_CAUSE);
2947 handled = 1;
2948 }
2949 /*
2950 * Handle interrupts signalled for this port:
2951 */
2952 port_cause = (main_irq_cause >> shift) & (DONE_IRQ | ERR_IRQ);
2953 if (port_cause)
2954 mv_port_intr(ap, port_cause);
2955 }
2956 return handled;
2957}
2958
2959static int mv_pci_error(struct ata_host *host, void __iomem *mmio)
2960{
2961 struct mv_host_priv *hpriv = host->private_data;
2962 struct ata_port *ap;
2963 struct ata_queued_cmd *qc;
2964 struct ata_eh_info *ehi;
2965 unsigned int i, err_mask, printed = 0;
2966 u32 err_cause;
2967
2968 err_cause = readl(mmio + hpriv->irq_cause_offset);
2969
2970 dev_err(host->dev, "PCI ERROR; PCI IRQ cause=0x%08x\n", err_cause);
2971
2972 DPRINTK("All regs @ PCI error\n");
2973 mv_dump_all_regs(mmio, -1, to_pci_dev(host->dev));
2974
2975 writelfl(0, mmio + hpriv->irq_cause_offset);
2976
2977 for (i = 0; i < host->n_ports; i++) {
2978 ap = host->ports[i];
2979 if (!ata_link_offline(&ap->link)) {
2980 ehi = &ap->link.eh_info;
2981 ata_ehi_clear_desc(ehi);
2982 if (!printed++)
2983 ata_ehi_push_desc(ehi,
2984 "PCI err cause 0x%08x", err_cause);
2985 err_mask = AC_ERR_HOST_BUS;
2986 ehi->action = ATA_EH_RESET;
2987 qc = ata_qc_from_tag(ap, ap->link.active_tag);
2988 if (qc)
2989 qc->err_mask |= err_mask;
2990 else
2991 ehi->err_mask |= err_mask;
2992
2993 ata_port_freeze(ap);
2994 }
2995 }
2996 return 1; /* handled */
2997}
2998
2999/**
3000 * mv_interrupt - Main interrupt event handler
3001 * @irq: unused
3002 * @dev_instance: private data; in this case the host structure
3003 *
3004 * Read the read only register to determine if any host
3005 * controllers have pending interrupts. If so, call lower level
3006 * routine to handle. Also check for PCI errors which are only
3007 * reported here.
3008 *
3009 * LOCKING:
3010 * This routine holds the host lock while processing pending
3011 * interrupts.
3012 */
3013static irqreturn_t mv_interrupt(int irq, void *dev_instance)
3014{
3015 struct ata_host *host = dev_instance;
3016 struct mv_host_priv *hpriv = host->private_data;
3017 unsigned int handled = 0;
3018 int using_msi = hpriv->hp_flags & MV_HP_FLAG_MSI;
3019 u32 main_irq_cause, pending_irqs;
3020
3021 spin_lock(&host->lock);
3022
3023 /* for MSI: block new interrupts while in here */
3024 if (using_msi)
3025 mv_write_main_irq_mask(0, hpriv);
3026
3027 main_irq_cause = readl(hpriv->main_irq_cause_addr);
3028 pending_irqs = main_irq_cause & hpriv->main_irq_mask;
3029 /*
3030 * Deal with cases where we either have nothing pending, or have read
3031 * a bogus register value which can indicate HW removal or PCI fault.
3032 */
3033 if (pending_irqs && main_irq_cause != 0xffffffffU) {
3034 if (unlikely((pending_irqs & PCI_ERR) && !IS_SOC(hpriv)))
3035 handled = mv_pci_error(host, hpriv->base);
3036 else
3037 handled = mv_host_intr(host, pending_irqs);
3038 }
3039
3040 /* for MSI: unmask; interrupt cause bits will retrigger now */
3041 if (using_msi)
3042 mv_write_main_irq_mask(hpriv->main_irq_mask, hpriv);
3043
3044 spin_unlock(&host->lock);
3045
3046 return IRQ_RETVAL(handled);
3047}
3048
3049static unsigned int mv5_scr_offset(unsigned int sc_reg_in)
3050{
3051 unsigned int ofs;
3052
3053 switch (sc_reg_in) {
3054 case SCR_STATUS:
3055 case SCR_ERROR:
3056 case SCR_CONTROL:
3057 ofs = sc_reg_in * sizeof(u32);
3058 break;
3059 default:
3060 ofs = 0xffffffffU;
3061 break;
3062 }
3063 return ofs;
3064}
3065
3066static int mv5_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val)
3067{
3068 struct mv_host_priv *hpriv = link->ap->host->private_data;
3069 void __iomem *mmio = hpriv->base;
3070 void __iomem *addr = mv5_phy_base(mmio, link->ap->port_no);
3071 unsigned int ofs = mv5_scr_offset(sc_reg_in);
3072
3073 if (ofs != 0xffffffffU) {
3074 *val = readl(addr + ofs);
3075 return 0;
3076 } else
3077 return -EINVAL;
3078}
3079
3080static int mv5_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val)
3081{
3082 struct mv_host_priv *hpriv = link->ap->host->private_data;
3083 void __iomem *mmio = hpriv->base;
3084 void __iomem *addr = mv5_phy_base(mmio, link->ap->port_no);
3085 unsigned int ofs = mv5_scr_offset(sc_reg_in);
3086
3087 if (ofs != 0xffffffffU) {
3088 writelfl(val, addr + ofs);
3089 return 0;
3090 } else
3091 return -EINVAL;
3092}
3093
3094static void mv5_reset_bus(struct ata_host *host, void __iomem *mmio)
3095{
3096 struct pci_dev *pdev = to_pci_dev(host->dev);
3097 int early_5080;
3098
3099 early_5080 = (pdev->device == 0x5080) && (pdev->revision == 0);
3100
3101 if (!early_5080) {
3102 u32 tmp = readl(mmio + MV_PCI_EXP_ROM_BAR_CTL);
3103 tmp |= (1 << 0);
3104 writel(tmp, mmio + MV_PCI_EXP_ROM_BAR_CTL);
3105 }
3106
3107 mv_reset_pci_bus(host, mmio);
3108}
3109
3110static void mv5_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio)
3111{
3112 writel(0x0fcfffff, mmio + FLASH_CTL);
3113}
3114
3115static void mv5_read_preamp(struct mv_host_priv *hpriv, int idx,
3116 void __iomem *mmio)
3117{
3118 void __iomem *phy_mmio = mv5_phy_base(mmio, idx);
3119 u32 tmp;
3120
3121 tmp = readl(phy_mmio + MV5_PHY_MODE);
3122
3123 hpriv->signal[idx].pre = tmp & 0x1800; /* bits 12:11 */
3124 hpriv->signal[idx].amps = tmp & 0xe0; /* bits 7:5 */
3125}
3126
3127static void mv5_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio)
3128{
3129 u32 tmp;
3130
3131 writel(0, mmio + GPIO_PORT_CTL);
3132
3133 /* FIXME: handle MV_HP_ERRATA_50XXB2 errata */
3134
3135 tmp = readl(mmio + MV_PCI_EXP_ROM_BAR_CTL);
3136 tmp |= ~(1 << 0);
3137 writel(tmp, mmio + MV_PCI_EXP_ROM_BAR_CTL);
3138}
3139
3140static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
3141 unsigned int port)
3142{
3143 void __iomem *phy_mmio = mv5_phy_base(mmio, port);
3144 const u32 mask = (1<<12) | (1<<11) | (1<<7) | (1<<6) | (1<<5);
3145 u32 tmp;
3146 int fix_apm_sq = (hpriv->hp_flags & MV_HP_ERRATA_50XXB0);
3147
3148 if (fix_apm_sq) {
3149 tmp = readl(phy_mmio + MV5_LTMODE);
3150 tmp |= (1 << 19);
3151 writel(tmp, phy_mmio + MV5_LTMODE);
3152
3153 tmp = readl(phy_mmio + MV5_PHY_CTL);
3154 tmp &= ~0x3;
3155 tmp |= 0x1;
3156 writel(tmp, phy_mmio + MV5_PHY_CTL);
3157 }
3158
3159 tmp = readl(phy_mmio + MV5_PHY_MODE);
3160 tmp &= ~mask;
3161 tmp |= hpriv->signal[port].pre;
3162 tmp |= hpriv->signal[port].amps;
3163 writel(tmp, phy_mmio + MV5_PHY_MODE);
3164}
3165
3166
3167#undef ZERO
3168#define ZERO(reg) writel(0, port_mmio + (reg))
3169static void mv5_reset_hc_port(struct mv_host_priv *hpriv, void __iomem *mmio,
3170 unsigned int port)
3171{
3172 void __iomem *port_mmio = mv_port_base(mmio, port);
3173
3174 mv_reset_channel(hpriv, mmio, port);
3175
3176 ZERO(0x028); /* command */
3177 writel(0x11f, port_mmio + EDMA_CFG);
3178 ZERO(0x004); /* timer */
3179 ZERO(0x008); /* irq err cause */
3180 ZERO(0x00c); /* irq err mask */
3181 ZERO(0x010); /* rq bah */
3182 ZERO(0x014); /* rq inp */
3183 ZERO(0x018); /* rq outp */
3184 ZERO(0x01c); /* respq bah */
3185 ZERO(0x024); /* respq outp */
3186 ZERO(0x020); /* respq inp */
3187 ZERO(0x02c); /* test control */
3188 writel(0xbc, port_mmio + EDMA_IORDY_TMOUT);
3189}
3190#undef ZERO
3191
3192#define ZERO(reg) writel(0, hc_mmio + (reg))
3193static void mv5_reset_one_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
3194 unsigned int hc)
3195{
3196 void __iomem *hc_mmio = mv_hc_base(mmio, hc);
3197 u32 tmp;
3198
3199 ZERO(0x00c);
3200 ZERO(0x010);
3201 ZERO(0x014);
3202 ZERO(0x018);
3203
3204 tmp = readl(hc_mmio + 0x20);
3205 tmp &= 0x1c1c1c1c;
3206 tmp |= 0x03030303;
3207 writel(tmp, hc_mmio + 0x20);
3208}
3209#undef ZERO
3210
3211static int mv5_reset_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
3212 unsigned int n_hc)
3213{
3214 unsigned int hc, port;
3215
3216 for (hc = 0; hc < n_hc; hc++) {
3217 for (port = 0; port < MV_PORTS_PER_HC; port++)
3218 mv5_reset_hc_port(hpriv, mmio,
3219 (hc * MV_PORTS_PER_HC) + port);
3220
3221 mv5_reset_one_hc(hpriv, mmio, hc);
3222 }
3223
3224 return 0;
3225}
3226
3227#undef ZERO
3228#define ZERO(reg) writel(0, mmio + (reg))
3229static void mv_reset_pci_bus(struct ata_host *host, void __iomem *mmio)
3230{
3231 struct mv_host_priv *hpriv = host->private_data;
3232 u32 tmp;
3233
3234 tmp = readl(mmio + MV_PCI_MODE);
3235 tmp &= 0xff00ffff;
3236 writel(tmp, mmio + MV_PCI_MODE);
3237
3238 ZERO(MV_PCI_DISC_TIMER);
3239 ZERO(MV_PCI_MSI_TRIGGER);
3240 writel(0x000100ff, mmio + MV_PCI_XBAR_TMOUT);
3241 ZERO(MV_PCI_SERR_MASK);
3242 ZERO(hpriv->irq_cause_offset);
3243 ZERO(hpriv->irq_mask_offset);
3244 ZERO(MV_PCI_ERR_LOW_ADDRESS);
3245 ZERO(MV_PCI_ERR_HIGH_ADDRESS);
3246 ZERO(MV_PCI_ERR_ATTRIBUTE);
3247 ZERO(MV_PCI_ERR_COMMAND);
3248}
3249#undef ZERO
3250
3251static void mv6_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio)
3252{
3253 u32 tmp;
3254
3255 mv5_reset_flash(hpriv, mmio);
3256
3257 tmp = readl(mmio + GPIO_PORT_CTL);
3258 tmp &= 0x3;
3259 tmp |= (1 << 5) | (1 << 6);
3260 writel(tmp, mmio + GPIO_PORT_CTL);
3261}
3262
3263/**
3264 * mv6_reset_hc - Perform the 6xxx global soft reset
3265 * @mmio: base address of the HBA
3266 *
3267 * This routine only applies to 6xxx parts.
3268 *
3269 * LOCKING:
3270 * Inherited from caller.
3271 */
3272static int mv6_reset_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
3273 unsigned int n_hc)
3274{
3275 void __iomem *reg = mmio + PCI_MAIN_CMD_STS;
3276 int i, rc = 0;
3277 u32 t;
3278
3279 /* Following procedure defined in PCI "main command and status
3280 * register" table.
3281 */
3282 t = readl(reg);
3283 writel(t | STOP_PCI_MASTER, reg);
3284
3285 for (i = 0; i < 1000; i++) {
3286 udelay(1);
3287 t = readl(reg);
3288 if (PCI_MASTER_EMPTY & t)
3289 break;
3290 }
3291 if (!(PCI_MASTER_EMPTY & t)) {
3292 printk(KERN_ERR DRV_NAME ": PCI master won't flush\n");
3293 rc = 1;
3294 goto done;
3295 }
3296
3297 /* set reset */
3298 i = 5;
3299 do {
3300 writel(t | GLOB_SFT_RST, reg);
3301 t = readl(reg);
3302 udelay(1);
3303 } while (!(GLOB_SFT_RST & t) && (i-- > 0));
3304
3305 if (!(GLOB_SFT_RST & t)) {
3306 printk(KERN_ERR DRV_NAME ": can't set global reset\n");
3307 rc = 1;
3308 goto done;
3309 }
3310
3311 /* clear reset and *reenable the PCI master* (not mentioned in spec) */
3312 i = 5;
3313 do {
3314 writel(t & ~(GLOB_SFT_RST | STOP_PCI_MASTER), reg);
3315 t = readl(reg);
3316 udelay(1);
3317 } while ((GLOB_SFT_RST & t) && (i-- > 0));
3318
3319 if (GLOB_SFT_RST & t) {
3320 printk(KERN_ERR DRV_NAME ": can't clear global reset\n");
3321 rc = 1;
3322 }
3323done:
3324 return rc;
3325}
3326
3327static void mv6_read_preamp(struct mv_host_priv *hpriv, int idx,
3328 void __iomem *mmio)
3329{
3330 void __iomem *port_mmio;
3331 u32 tmp;
3332
3333 tmp = readl(mmio + RESET_CFG);
3334 if ((tmp & (1 << 0)) == 0) {
3335 hpriv->signal[idx].amps = 0x7 << 8;
3336 hpriv->signal[idx].pre = 0x1 << 5;
3337 return;
3338 }
3339
3340 port_mmio = mv_port_base(mmio, idx);
3341 tmp = readl(port_mmio + PHY_MODE2);
3342
3343 hpriv->signal[idx].amps = tmp & 0x700; /* bits 10:8 */
3344 hpriv->signal[idx].pre = tmp & 0xe0; /* bits 7:5 */
3345}
3346
3347static void mv6_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio)
3348{
3349 writel(0x00000060, mmio + GPIO_PORT_CTL);
3350}
3351
3352static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
3353 unsigned int port)
3354{
3355 void __iomem *port_mmio = mv_port_base(mmio, port);
3356
3357 u32 hp_flags = hpriv->hp_flags;
3358 int fix_phy_mode2 =
3359 hp_flags & (MV_HP_ERRATA_60X1B2 | MV_HP_ERRATA_60X1C0);
3360 int fix_phy_mode4 =
3361 hp_flags & (MV_HP_ERRATA_60X1B2 | MV_HP_ERRATA_60X1C0);
3362 u32 m2, m3;
3363
3364 if (fix_phy_mode2) {
3365 m2 = readl(port_mmio + PHY_MODE2);
3366 m2 &= ~(1 << 16);
3367 m2 |= (1 << 31);
3368 writel(m2, port_mmio + PHY_MODE2);
3369
3370 udelay(200);
3371
3372 m2 = readl(port_mmio + PHY_MODE2);
3373 m2 &= ~((1 << 16) | (1 << 31));
3374 writel(m2, port_mmio + PHY_MODE2);
3375
3376 udelay(200);
3377 }
3378
3379 /*
3380 * Gen-II/IIe PHY_MODE3 errata RM#2:
3381 * Achieves better receiver noise performance than the h/w default:
3382 */
3383 m3 = readl(port_mmio + PHY_MODE3);
3384 m3 = (m3 & 0x1f) | (0x5555601 << 5);
3385
3386 /* Guideline 88F5182 (GL# SATA-S11) */
3387 if (IS_SOC(hpriv))
3388 m3 &= ~0x1c;
3389
3390 if (fix_phy_mode4) {
3391 u32 m4 = readl(port_mmio + PHY_MODE4);
3392 /*
3393 * Enforce reserved-bit restrictions on GenIIe devices only.
3394 * For earlier chipsets, force only the internal config field
3395 * (workaround for errata FEr SATA#10 part 1).
3396 */
3397 if (IS_GEN_IIE(hpriv))
3398 m4 = (m4 & ~PHY_MODE4_RSVD_ZEROS) | PHY_MODE4_RSVD_ONES;
3399 else
3400 m4 = (m4 & ~PHY_MODE4_CFG_MASK) | PHY_MODE4_CFG_VALUE;
3401 writel(m4, port_mmio + PHY_MODE4);
3402 }
3403 /*
3404 * Workaround for 60x1-B2 errata SATA#13:
3405 * Any write to PHY_MODE4 (above) may corrupt PHY_MODE3,
3406 * so we must always rewrite PHY_MODE3 after PHY_MODE4.
3407 * Or ensure we use writelfl() when writing PHY_MODE4.
3408 */
3409 writel(m3, port_mmio + PHY_MODE3);
3410
3411 /* Revert values of pre-emphasis and signal amps to the saved ones */
3412 m2 = readl(port_mmio + PHY_MODE2);
3413
3414 m2 &= ~MV_M2_PREAMP_MASK;
3415 m2 |= hpriv->signal[port].amps;
3416 m2 |= hpriv->signal[port].pre;
3417 m2 &= ~(1 << 16);
3418
3419 /* according to mvSata 3.6.1, some IIE values are fixed */
3420 if (IS_GEN_IIE(hpriv)) {
3421 m2 &= ~0xC30FF01F;
3422 m2 |= 0x0000900F;
3423 }
3424
3425 writel(m2, port_mmio + PHY_MODE2);
3426}
3427
3428/* TODO: use the generic LED interface to configure the SATA Presence */
3429/* & Acitivy LEDs on the board */
3430static void mv_soc_enable_leds(struct mv_host_priv *hpriv,
3431 void __iomem *mmio)
3432{
3433 return;
3434}
3435
3436static void mv_soc_read_preamp(struct mv_host_priv *hpriv, int idx,
3437 void __iomem *mmio)
3438{
3439 void __iomem *port_mmio;
3440 u32 tmp;
3441
3442 port_mmio = mv_port_base(mmio, idx);
3443 tmp = readl(port_mmio + PHY_MODE2);
3444
3445 hpriv->signal[idx].amps = tmp & 0x700; /* bits 10:8 */
3446 hpriv->signal[idx].pre = tmp & 0xe0; /* bits 7:5 */
3447}
3448
3449#undef ZERO
3450#define ZERO(reg) writel(0, port_mmio + (reg))
3451static void mv_soc_reset_hc_port(struct mv_host_priv *hpriv,
3452 void __iomem *mmio, unsigned int port)
3453{
3454 void __iomem *port_mmio = mv_port_base(mmio, port);
3455
3456 mv_reset_channel(hpriv, mmio, port);
3457
3458 ZERO(0x028); /* command */
3459 writel(0x101f, port_mmio + EDMA_CFG);
3460 ZERO(0x004); /* timer */
3461 ZERO(0x008); /* irq err cause */
3462 ZERO(0x00c); /* irq err mask */
3463 ZERO(0x010); /* rq bah */
3464 ZERO(0x014); /* rq inp */
3465 ZERO(0x018); /* rq outp */
3466 ZERO(0x01c); /* respq bah */
3467 ZERO(0x024); /* respq outp */
3468 ZERO(0x020); /* respq inp */
3469 ZERO(0x02c); /* test control */
3470 writel(0x800, port_mmio + EDMA_IORDY_TMOUT);
3471}
3472
3473#undef ZERO
3474
3475#define ZERO(reg) writel(0, hc_mmio + (reg))
3476static void mv_soc_reset_one_hc(struct mv_host_priv *hpriv,
3477 void __iomem *mmio)
3478{
3479 void __iomem *hc_mmio = mv_hc_base(mmio, 0);
3480
3481 ZERO(0x00c);
3482 ZERO(0x010);
3483 ZERO(0x014);
3484
3485}
3486
3487#undef ZERO
3488
3489static int mv_soc_reset_hc(struct mv_host_priv *hpriv,
3490 void __iomem *mmio, unsigned int n_hc)
3491{
3492 unsigned int port;
3493
3494 for (port = 0; port < hpriv->n_ports; port++)
3495 mv_soc_reset_hc_port(hpriv, mmio, port);
3496
3497 mv_soc_reset_one_hc(hpriv, mmio);
3498
3499 return 0;
3500}
3501
3502static void mv_soc_reset_flash(struct mv_host_priv *hpriv,
3503 void __iomem *mmio)
3504{
3505 return;
3506}
3507
3508static void mv_soc_reset_bus(struct ata_host *host, void __iomem *mmio)
3509{
3510 return;
3511}
3512
3513static void mv_soc_65n_phy_errata(struct mv_host_priv *hpriv,
3514 void __iomem *mmio, unsigned int port)
3515{
3516 void __iomem *port_mmio = mv_port_base(mmio, port);
3517 u32 reg;
3518
3519 reg = readl(port_mmio + PHY_MODE3);
3520 reg &= ~(0x3 << 27); /* SELMUPF (bits 28:27) to 1 */
3521 reg |= (0x1 << 27);
3522 reg &= ~(0x3 << 29); /* SELMUPI (bits 30:29) to 1 */
3523 reg |= (0x1 << 29);
3524 writel(reg, port_mmio + PHY_MODE3);
3525
3526 reg = readl(port_mmio + PHY_MODE4);
3527 reg &= ~0x1; /* SATU_OD8 (bit 0) to 0, reserved bit 16 must be set */
3528 reg |= (0x1 << 16);
3529 writel(reg, port_mmio + PHY_MODE4);
3530
3531 reg = readl(port_mmio + PHY_MODE9_GEN2);
3532 reg &= ~0xf; /* TXAMP[3:0] (bits 3:0) to 8 */
3533 reg |= 0x8;
3534 reg &= ~(0x1 << 14); /* TXAMP[4] (bit 14) to 0 */
3535 writel(reg, port_mmio + PHY_MODE9_GEN2);
3536
3537 reg = readl(port_mmio + PHY_MODE9_GEN1);
3538 reg &= ~0xf; /* TXAMP[3:0] (bits 3:0) to 8 */
3539 reg |= 0x8;
3540 reg &= ~(0x1 << 14); /* TXAMP[4] (bit 14) to 0 */
3541 writel(reg, port_mmio + PHY_MODE9_GEN1);
3542}
3543
3544/**
3545 * soc_is_65 - check if the soc is 65 nano device
3546 *
3547 * Detect the type of the SoC, this is done by reading the PHYCFG_OFS
3548 * register, this register should contain non-zero value and it exists only
3549 * in the 65 nano devices, when reading it from older devices we get 0.
3550 */
3551static bool soc_is_65n(struct mv_host_priv *hpriv)
3552{
3553 void __iomem *port0_mmio = mv_port_base(hpriv->base, 0);
3554
3555 if (readl(port0_mmio + PHYCFG_OFS))
3556 return true;
3557 return false;
3558}
3559
3560static void mv_setup_ifcfg(void __iomem *port_mmio, int want_gen2i)
3561{
3562 u32 ifcfg = readl(port_mmio + SATA_IFCFG);
3563
3564 ifcfg = (ifcfg & 0xf7f) | 0x9b1000; /* from chip spec */
3565 if (want_gen2i)
3566 ifcfg |= (1 << 7); /* enable gen2i speed */
3567 writelfl(ifcfg, port_mmio + SATA_IFCFG);
3568}
3569
3570static void mv_reset_channel(struct mv_host_priv *hpriv, void __iomem *mmio,
3571 unsigned int port_no)
3572{
3573 void __iomem *port_mmio = mv_port_base(mmio, port_no);
3574
3575 /*
3576 * The datasheet warns against setting EDMA_RESET when EDMA is active
3577 * (but doesn't say what the problem might be). So we first try
3578 * to disable the EDMA engine before doing the EDMA_RESET operation.
3579 */
3580 mv_stop_edma_engine(port_mmio);
3581 writelfl(EDMA_RESET, port_mmio + EDMA_CMD);
3582
3583 if (!IS_GEN_I(hpriv)) {
3584 /* Enable 3.0gb/s link speed: this survives EDMA_RESET */
3585 mv_setup_ifcfg(port_mmio, 1);
3586 }
3587 /*
3588 * Strobing EDMA_RESET here causes a hard reset of the SATA transport,
3589 * link, and physical layers. It resets all SATA interface registers
3590 * (except for SATA_IFCFG), and issues a COMRESET to the dev.
3591 */
3592 writelfl(EDMA_RESET, port_mmio + EDMA_CMD);
3593 udelay(25); /* allow reset propagation */
3594 writelfl(0, port_mmio + EDMA_CMD);
3595
3596 hpriv->ops->phy_errata(hpriv, mmio, port_no);
3597
3598 if (IS_GEN_I(hpriv))
3599 usleep_range(500, 1000);
3600}
3601
3602static void mv_pmp_select(struct ata_port *ap, int pmp)
3603{
3604 if (sata_pmp_supported(ap)) {
3605 void __iomem *port_mmio = mv_ap_base(ap);
3606 u32 reg = readl(port_mmio + SATA_IFCTL);
3607 int old = reg & 0xf;
3608
3609 if (old != pmp) {
3610 reg = (reg & ~0xf) | pmp;
3611 writelfl(reg, port_mmio + SATA_IFCTL);
3612 }
3613 }
3614}
3615
3616static int mv_pmp_hardreset(struct ata_link *link, unsigned int *class,
3617 unsigned long deadline)
3618{
3619 mv_pmp_select(link->ap, sata_srst_pmp(link));
3620 return sata_std_hardreset(link, class, deadline);
3621}
3622
3623static int mv_softreset(struct ata_link *link, unsigned int *class,
3624 unsigned long deadline)
3625{
3626 mv_pmp_select(link->ap, sata_srst_pmp(link));
3627 return ata_sff_softreset(link, class, deadline);
3628}
3629
3630static int mv_hardreset(struct ata_link *link, unsigned int *class,
3631 unsigned long deadline)
3632{
3633 struct ata_port *ap = link->ap;
3634 struct mv_host_priv *hpriv = ap->host->private_data;
3635 struct mv_port_priv *pp = ap->private_data;
3636 void __iomem *mmio = hpriv->base;
3637 int rc, attempts = 0, extra = 0;
3638 u32 sstatus;
3639 bool online;
3640
3641 mv_reset_channel(hpriv, mmio, ap->port_no);
3642 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
3643 pp->pp_flags &=
3644 ~(MV_PP_FLAG_FBS_EN | MV_PP_FLAG_NCQ_EN | MV_PP_FLAG_FAKE_ATA_BUSY);
3645
3646 /* Workaround for errata FEr SATA#10 (part 2) */
3647 do {
3648 const unsigned long *timing =
3649 sata_ehc_deb_timing(&link->eh_context);
3650
3651 rc = sata_link_hardreset(link, timing, deadline + extra,
3652 &online, NULL);
3653 rc = online ? -EAGAIN : rc;
3654 if (rc)
3655 return rc;
3656 sata_scr_read(link, SCR_STATUS, &sstatus);
3657 if (!IS_GEN_I(hpriv) && ++attempts >= 5 && sstatus == 0x121) {
3658 /* Force 1.5gb/s link speed and try again */
3659 mv_setup_ifcfg(mv_ap_base(ap), 0);
3660 if (time_after(jiffies + HZ, deadline))
3661 extra = HZ; /* only extend it once, max */
3662 }
3663 } while (sstatus != 0x0 && sstatus != 0x113 && sstatus != 0x123);
3664 mv_save_cached_regs(ap);
3665 mv_edma_cfg(ap, 0, 0);
3666
3667 return rc;
3668}
3669
3670static void mv_eh_freeze(struct ata_port *ap)
3671{
3672 mv_stop_edma(ap);
3673 mv_enable_port_irqs(ap, 0);
3674}
3675
3676static void mv_eh_thaw(struct ata_port *ap)
3677{
3678 struct mv_host_priv *hpriv = ap->host->private_data;
3679 unsigned int port = ap->port_no;
3680 unsigned int hardport = mv_hardport_from_port(port);
3681 void __iomem *hc_mmio = mv_hc_base_from_port(hpriv->base, port);
3682 void __iomem *port_mmio = mv_ap_base(ap);
3683 u32 hc_irq_cause;
3684
3685 /* clear EDMA errors on this port */
3686 writel(0, port_mmio + EDMA_ERR_IRQ_CAUSE);
3687
3688 /* clear pending irq events */
3689 hc_irq_cause = ~((DEV_IRQ | DMA_IRQ) << hardport);
3690 writelfl(hc_irq_cause, hc_mmio + HC_IRQ_CAUSE);
3691
3692 mv_enable_port_irqs(ap, ERR_IRQ);
3693}
3694
3695/**
3696 * mv_port_init - Perform some early initialization on a single port.
3697 * @port: libata data structure storing shadow register addresses
3698 * @port_mmio: base address of the port
3699 *
3700 * Initialize shadow register mmio addresses, clear outstanding
3701 * interrupts on the port, and unmask interrupts for the future
3702 * start of the port.
3703 *
3704 * LOCKING:
3705 * Inherited from caller.
3706 */
3707static void mv_port_init(struct ata_ioports *port, void __iomem *port_mmio)
3708{
3709 void __iomem *serr, *shd_base = port_mmio + SHD_BLK;
3710
3711 /* PIO related setup
3712 */
3713 port->data_addr = shd_base + (sizeof(u32) * ATA_REG_DATA);
3714 port->error_addr =
3715 port->feature_addr = shd_base + (sizeof(u32) * ATA_REG_ERR);
3716 port->nsect_addr = shd_base + (sizeof(u32) * ATA_REG_NSECT);
3717 port->lbal_addr = shd_base + (sizeof(u32) * ATA_REG_LBAL);
3718 port->lbam_addr = shd_base + (sizeof(u32) * ATA_REG_LBAM);
3719 port->lbah_addr = shd_base + (sizeof(u32) * ATA_REG_LBAH);
3720 port->device_addr = shd_base + (sizeof(u32) * ATA_REG_DEVICE);
3721 port->status_addr =
3722 port->command_addr = shd_base + (sizeof(u32) * ATA_REG_STATUS);
3723 /* special case: control/altstatus doesn't have ATA_REG_ address */
3724 port->altstatus_addr = port->ctl_addr = shd_base + SHD_CTL_AST;
3725
3726 /* Clear any currently outstanding port interrupt conditions */
3727 serr = port_mmio + mv_scr_offset(SCR_ERROR);
3728 writelfl(readl(serr), serr);
3729 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE);
3730
3731 /* unmask all non-transient EDMA error interrupts */
3732 writelfl(~EDMA_ERR_IRQ_TRANSIENT, port_mmio + EDMA_ERR_IRQ_MASK);
3733
3734 VPRINTK("EDMA cfg=0x%08x EDMA IRQ err cause/mask=0x%08x/0x%08x\n",
3735 readl(port_mmio + EDMA_CFG),
3736 readl(port_mmio + EDMA_ERR_IRQ_CAUSE),
3737 readl(port_mmio + EDMA_ERR_IRQ_MASK));
3738}
3739
3740static unsigned int mv_in_pcix_mode(struct ata_host *host)
3741{
3742 struct mv_host_priv *hpriv = host->private_data;
3743 void __iomem *mmio = hpriv->base;
3744 u32 reg;
3745
3746 if (IS_SOC(hpriv) || !IS_PCIE(hpriv))
3747 return 0; /* not PCI-X capable */
3748 reg = readl(mmio + MV_PCI_MODE);
3749 if ((reg & MV_PCI_MODE_MASK) == 0)
3750 return 0; /* conventional PCI mode */
3751 return 1; /* chip is in PCI-X mode */
3752}
3753
3754static int mv_pci_cut_through_okay(struct ata_host *host)
3755{
3756 struct mv_host_priv *hpriv = host->private_data;
3757 void __iomem *mmio = hpriv->base;
3758 u32 reg;
3759
3760 if (!mv_in_pcix_mode(host)) {
3761 reg = readl(mmio + MV_PCI_COMMAND);
3762 if (reg & MV_PCI_COMMAND_MRDTRIG)
3763 return 0; /* not okay */
3764 }
3765 return 1; /* okay */
3766}
3767
3768static void mv_60x1b2_errata_pci7(struct ata_host *host)
3769{
3770 struct mv_host_priv *hpriv = host->private_data;
3771 void __iomem *mmio = hpriv->base;
3772
3773 /* workaround for 60x1-B2 errata PCI#7 */
3774 if (mv_in_pcix_mode(host)) {
3775 u32 reg = readl(mmio + MV_PCI_COMMAND);
3776 writelfl(reg & ~MV_PCI_COMMAND_MWRCOM, mmio + MV_PCI_COMMAND);
3777 }
3778}
3779
3780static int mv_chip_id(struct ata_host *host, unsigned int board_idx)
3781{
3782 struct pci_dev *pdev = to_pci_dev(host->dev);
3783 struct mv_host_priv *hpriv = host->private_data;
3784 u32 hp_flags = hpriv->hp_flags;
3785
3786 switch (board_idx) {
3787 case chip_5080:
3788 hpriv->ops = &mv5xxx_ops;
3789 hp_flags |= MV_HP_GEN_I;
3790
3791 switch (pdev->revision) {
3792 case 0x1:
3793 hp_flags |= MV_HP_ERRATA_50XXB0;
3794 break;
3795 case 0x3:
3796 hp_flags |= MV_HP_ERRATA_50XXB2;
3797 break;
3798 default:
3799 dev_warn(&pdev->dev,
3800 "Applying 50XXB2 workarounds to unknown rev\n");
3801 hp_flags |= MV_HP_ERRATA_50XXB2;
3802 break;
3803 }
3804 break;
3805
3806 case chip_504x:
3807 case chip_508x:
3808 hpriv->ops = &mv5xxx_ops;
3809 hp_flags |= MV_HP_GEN_I;
3810
3811 switch (pdev->revision) {
3812 case 0x0:
3813 hp_flags |= MV_HP_ERRATA_50XXB0;
3814 break;
3815 case 0x3:
3816 hp_flags |= MV_HP_ERRATA_50XXB2;
3817 break;
3818 default:
3819 dev_warn(&pdev->dev,
3820 "Applying B2 workarounds to unknown rev\n");
3821 hp_flags |= MV_HP_ERRATA_50XXB2;
3822 break;
3823 }
3824 break;
3825
3826 case chip_604x:
3827 case chip_608x:
3828 hpriv->ops = &mv6xxx_ops;
3829 hp_flags |= MV_HP_GEN_II;
3830
3831 switch (pdev->revision) {
3832 case 0x7:
3833 mv_60x1b2_errata_pci7(host);
3834 hp_flags |= MV_HP_ERRATA_60X1B2;
3835 break;
3836 case 0x9:
3837 hp_flags |= MV_HP_ERRATA_60X1C0;
3838 break;
3839 default:
3840 dev_warn(&pdev->dev,
3841 "Applying B2 workarounds to unknown rev\n");
3842 hp_flags |= MV_HP_ERRATA_60X1B2;
3843 break;
3844 }
3845 break;
3846
3847 case chip_7042:
3848 hp_flags |= MV_HP_PCIE | MV_HP_CUT_THROUGH;
3849 if (pdev->vendor == PCI_VENDOR_ID_TTI &&
3850 (pdev->device == 0x2300 || pdev->device == 0x2310))
3851 {
3852 /*
3853 * Highpoint RocketRAID PCIe 23xx series cards:
3854 *
3855 * Unconfigured drives are treated as "Legacy"
3856 * by the BIOS, and it overwrites sector 8 with
3857 * a "Lgcy" metadata block prior to Linux boot.
3858 *
3859 * Configured drives (RAID or JBOD) leave sector 8
3860 * alone, but instead overwrite a high numbered
3861 * sector for the RAID metadata. This sector can
3862 * be determined exactly, by truncating the physical
3863 * drive capacity to a nice even GB value.
3864 *
3865 * RAID metadata is at: (dev->n_sectors & ~0xfffff)
3866 *
3867 * Warn the user, lest they think we're just buggy.
3868 */
3869 printk(KERN_WARNING DRV_NAME ": Highpoint RocketRAID"
3870 " BIOS CORRUPTS DATA on all attached drives,"
3871 " regardless of if/how they are configured."
3872 " BEWARE!\n");
3873 printk(KERN_WARNING DRV_NAME ": For data safety, do not"
3874 " use sectors 8-9 on \"Legacy\" drives,"
3875 " and avoid the final two gigabytes on"
3876 " all RocketRAID BIOS initialized drives.\n");
3877 }
3878 /* fall through */
3879 case chip_6042:
3880 hpriv->ops = &mv6xxx_ops;
3881 hp_flags |= MV_HP_GEN_IIE;
3882 if (board_idx == chip_6042 && mv_pci_cut_through_okay(host))
3883 hp_flags |= MV_HP_CUT_THROUGH;
3884
3885 switch (pdev->revision) {
3886 case 0x2: /* Rev.B0: the first/only public release */
3887 hp_flags |= MV_HP_ERRATA_60X1C0;
3888 break;
3889 default:
3890 dev_warn(&pdev->dev,
3891 "Applying 60X1C0 workarounds to unknown rev\n");
3892 hp_flags |= MV_HP_ERRATA_60X1C0;
3893 break;
3894 }
3895 break;
3896 case chip_soc:
3897 if (soc_is_65n(hpriv))
3898 hpriv->ops = &mv_soc_65n_ops;
3899 else
3900 hpriv->ops = &mv_soc_ops;
3901 hp_flags |= MV_HP_FLAG_SOC | MV_HP_GEN_IIE |
3902 MV_HP_ERRATA_60X1C0;
3903 break;
3904
3905 default:
3906 dev_err(host->dev, "BUG: invalid board index %u\n", board_idx);
3907 return 1;
3908 }
3909
3910 hpriv->hp_flags = hp_flags;
3911 if (hp_flags & MV_HP_PCIE) {
3912 hpriv->irq_cause_offset = PCIE_IRQ_CAUSE;
3913 hpriv->irq_mask_offset = PCIE_IRQ_MASK;
3914 hpriv->unmask_all_irqs = PCIE_UNMASK_ALL_IRQS;
3915 } else {
3916 hpriv->irq_cause_offset = PCI_IRQ_CAUSE;
3917 hpriv->irq_mask_offset = PCI_IRQ_MASK;
3918 hpriv->unmask_all_irqs = PCI_UNMASK_ALL_IRQS;
3919 }
3920
3921 return 0;
3922}
3923
3924/**
3925 * mv_init_host - Perform some early initialization of the host.
3926 * @host: ATA host to initialize
3927 *
3928 * If possible, do an early global reset of the host. Then do
3929 * our port init and clear/unmask all/relevant host interrupts.
3930 *
3931 * LOCKING:
3932 * Inherited from caller.
3933 */
3934static int mv_init_host(struct ata_host *host)
3935{
3936 int rc = 0, n_hc, port, hc;
3937 struct mv_host_priv *hpriv = host->private_data;
3938 void __iomem *mmio = hpriv->base;
3939
3940 rc = mv_chip_id(host, hpriv->board_idx);
3941 if (rc)
3942 goto done;
3943
3944 if (IS_SOC(hpriv)) {
3945 hpriv->main_irq_cause_addr = mmio + SOC_HC_MAIN_IRQ_CAUSE;
3946 hpriv->main_irq_mask_addr = mmio + SOC_HC_MAIN_IRQ_MASK;
3947 } else {
3948 hpriv->main_irq_cause_addr = mmio + PCI_HC_MAIN_IRQ_CAUSE;
3949 hpriv->main_irq_mask_addr = mmio + PCI_HC_MAIN_IRQ_MASK;
3950 }
3951
3952 /* initialize shadow irq mask with register's value */
3953 hpriv->main_irq_mask = readl(hpriv->main_irq_mask_addr);
3954
3955 /* global interrupt mask: 0 == mask everything */
3956 mv_set_main_irq_mask(host, ~0, 0);
3957
3958 n_hc = mv_get_hc_count(host->ports[0]->flags);
3959
3960 for (port = 0; port < host->n_ports; port++)
3961 if (hpriv->ops->read_preamp)
3962 hpriv->ops->read_preamp(hpriv, port, mmio);
3963
3964 rc = hpriv->ops->reset_hc(hpriv, mmio, n_hc);
3965 if (rc)
3966 goto done;
3967
3968 hpriv->ops->reset_flash(hpriv, mmio);
3969 hpriv->ops->reset_bus(host, mmio);
3970 hpriv->ops->