Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 1 | /* |
| 2 | * libata-pmp.c - libata port multiplier support |
| 3 | * |
| 4 | * Copyright (c) 2007 SUSE Linux Products GmbH |
| 5 | * Copyright (c) 2007 Tejun Heo <teheo@suse.de> |
| 6 | * |
| 7 | * This file is released under the GPLv2. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/libata.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 12 | #include <linux/slab.h> |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 13 | #include "libata.h" |
| 14 | |
Tejun Heo | 48515f6 | 2008-04-07 22:47:21 +0900 | [diff] [blame] | 15 | const struct ata_port_operations sata_pmp_port_ops = { |
| 16 | .inherits = &sata_port_ops, |
| 17 | .pmp_prereset = ata_std_prereset, |
| 18 | .pmp_hardreset = sata_std_hardreset, |
| 19 | .pmp_postreset = ata_std_postreset, |
| 20 | .error_handler = sata_pmp_error_handler, |
| 21 | }; |
| 22 | |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 23 | /** |
| 24 | * sata_pmp_read - read PMP register |
| 25 | * @link: link to read PMP register for |
| 26 | * @reg: register to read |
| 27 | * @r_val: resulting value |
| 28 | * |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 29 | * Read PMP register. |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 30 | * |
| 31 | * LOCKING: |
| 32 | * Kernel thread context (may sleep). |
| 33 | * |
| 34 | * RETURNS: |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 35 | * 0 on success, AC_ERR_* mask on failure. |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 36 | */ |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 37 | static unsigned int sata_pmp_read(struct ata_link *link, int reg, u32 *r_val) |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 38 | { |
| 39 | struct ata_port *ap = link->ap; |
| 40 | struct ata_device *pmp_dev = ap->link.device; |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 41 | struct ata_taskfile tf; |
| 42 | unsigned int err_mask; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 43 | |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 44 | ata_tf_init(pmp_dev, &tf); |
| 45 | tf.command = ATA_CMD_PMP_READ; |
| 46 | tf.protocol = ATA_PROT_NODATA; |
Mark Lord | 39f25e7 | 2008-02-21 15:52:25 -0500 | [diff] [blame] | 47 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 48 | tf.feature = reg; |
| 49 | tf.device = link->pmp; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 50 | |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 51 | err_mask = ata_exec_internal(pmp_dev, &tf, NULL, DMA_NONE, NULL, 0, |
Tejun Heo | bf1bff6 | 2008-05-19 01:15:10 +0900 | [diff] [blame] | 52 | SATA_PMP_RW_TIMEOUT); |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 53 | if (err_mask) |
| 54 | return err_mask; |
| 55 | |
| 56 | *r_val = tf.nsect | tf.lbal << 8 | tf.lbam << 16 | tf.lbah << 24; |
| 57 | return 0; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 58 | } |
| 59 | |
| 60 | /** |
| 61 | * sata_pmp_write - write PMP register |
| 62 | * @link: link to write PMP register for |
| 63 | * @reg: register to write |
| 64 | * @r_val: value to write |
| 65 | * |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 66 | * Write PMP register. |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 67 | * |
| 68 | * LOCKING: |
| 69 | * Kernel thread context (may sleep). |
| 70 | * |
| 71 | * RETURNS: |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 72 | * 0 on success, AC_ERR_* mask on failure. |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 73 | */ |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 74 | static unsigned int sata_pmp_write(struct ata_link *link, int reg, u32 val) |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 75 | { |
| 76 | struct ata_port *ap = link->ap; |
| 77 | struct ata_device *pmp_dev = ap->link.device; |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 78 | struct ata_taskfile tf; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 79 | |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 80 | ata_tf_init(pmp_dev, &tf); |
| 81 | tf.command = ATA_CMD_PMP_WRITE; |
| 82 | tf.protocol = ATA_PROT_NODATA; |
Mark Lord | 39f25e7 | 2008-02-21 15:52:25 -0500 | [diff] [blame] | 83 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 84 | tf.feature = reg; |
| 85 | tf.device = link->pmp; |
| 86 | tf.nsect = val & 0xff; |
| 87 | tf.lbal = (val >> 8) & 0xff; |
| 88 | tf.lbam = (val >> 16) & 0xff; |
| 89 | tf.lbah = (val >> 24) & 0xff; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 90 | |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 91 | return ata_exec_internal(pmp_dev, &tf, NULL, DMA_NONE, NULL, 0, |
Tejun Heo | bf1bff6 | 2008-05-19 01:15:10 +0900 | [diff] [blame] | 92 | SATA_PMP_RW_TIMEOUT); |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | /** |
Tejun Heo | 31f8838 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 96 | * sata_pmp_qc_defer_cmd_switch - qc_defer for command switching PMP |
| 97 | * @qc: ATA command in question |
| 98 | * |
| 99 | * A host which has command switching PMP support cannot issue |
| 100 | * commands to multiple links simultaneously. |
| 101 | * |
| 102 | * LOCKING: |
| 103 | * spin_lock_irqsave(host lock) |
| 104 | * |
| 105 | * RETURNS: |
| 106 | * ATA_DEFER_* if deferring is needed, 0 otherwise. |
| 107 | */ |
| 108 | int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc) |
| 109 | { |
| 110 | struct ata_link *link = qc->dev->link; |
| 111 | struct ata_port *ap = link->ap; |
| 112 | |
| 113 | if (ap->excl_link == NULL || ap->excl_link == link) { |
| 114 | if (ap->nr_active_links == 0 || ata_link_active(link)) { |
| 115 | qc->flags |= ATA_QCFLAG_CLEAR_EXCL; |
| 116 | return ata_std_qc_defer(qc); |
| 117 | } |
| 118 | |
| 119 | ap->excl_link = link; |
| 120 | } |
| 121 | |
| 122 | return ATA_DEFER_PORT; |
| 123 | } |
| 124 | |
| 125 | /** |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 126 | * sata_pmp_scr_read - read PSCR |
| 127 | * @link: ATA link to read PSCR for |
| 128 | * @reg: PSCR to read |
| 129 | * @r_val: resulting value |
| 130 | * |
| 131 | * Read PSCR @reg into @r_val for @link, to be called from |
| 132 | * ata_scr_read(). |
| 133 | * |
| 134 | * LOCKING: |
| 135 | * Kernel thread context (may sleep). |
| 136 | * |
| 137 | * RETURNS: |
| 138 | * 0 on success, -errno on failure. |
| 139 | */ |
| 140 | int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *r_val) |
| 141 | { |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 142 | unsigned int err_mask; |
| 143 | |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 144 | if (reg > SATA_PMP_PSCR_CONTROL) |
| 145 | return -EINVAL; |
| 146 | |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 147 | err_mask = sata_pmp_read(link, reg, r_val); |
| 148 | if (err_mask) { |
| 149 | ata_link_printk(link, KERN_WARNING, "failed to read SCR %d " |
| 150 | "(Emask=0x%x)\n", reg, err_mask); |
| 151 | return -EIO; |
| 152 | } |
| 153 | return 0; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | /** |
| 157 | * sata_pmp_scr_write - write PSCR |
| 158 | * @link: ATA link to write PSCR for |
| 159 | * @reg: PSCR to write |
| 160 | * @val: value to be written |
| 161 | * |
| 162 | * Write @val to PSCR @reg for @link, to be called from |
| 163 | * ata_scr_write() and ata_scr_write_flush(). |
| 164 | * |
| 165 | * LOCKING: |
| 166 | * Kernel thread context (may sleep). |
| 167 | * |
| 168 | * RETURNS: |
| 169 | * 0 on success, -errno on failure. |
| 170 | */ |
| 171 | int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val) |
| 172 | { |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 173 | unsigned int err_mask; |
| 174 | |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 175 | if (reg > SATA_PMP_PSCR_CONTROL) |
| 176 | return -EINVAL; |
| 177 | |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 178 | err_mask = sata_pmp_write(link, reg, val); |
| 179 | if (err_mask) { |
| 180 | ata_link_printk(link, KERN_WARNING, "failed to write SCR %d " |
| 181 | "(Emask=0x%x)\n", reg, err_mask); |
| 182 | return -EIO; |
| 183 | } |
| 184 | return 0; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | /** |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 188 | * sata_pmp_read_gscr - read GSCR block of SATA PMP |
| 189 | * @dev: PMP device |
| 190 | * @gscr: buffer to read GSCR block into |
| 191 | * |
| 192 | * Read selected PMP GSCRs from the PMP at @dev. This will serve |
| 193 | * as configuration and identification info for the PMP. |
| 194 | * |
| 195 | * LOCKING: |
| 196 | * Kernel thread context (may sleep). |
| 197 | * |
| 198 | * RETURNS: |
| 199 | * 0 on success, -errno on failure. |
| 200 | */ |
| 201 | static int sata_pmp_read_gscr(struct ata_device *dev, u32 *gscr) |
| 202 | { |
| 203 | static const int gscr_to_read[] = { 0, 1, 2, 32, 33, 64, 96 }; |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 204 | int i; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 205 | |
| 206 | for (i = 0; i < ARRAY_SIZE(gscr_to_read); i++) { |
| 207 | int reg = gscr_to_read[i]; |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 208 | unsigned int err_mask; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 209 | |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 210 | err_mask = sata_pmp_read(dev->link, reg, &gscr[reg]); |
| 211 | if (err_mask) { |
| 212 | ata_dev_printk(dev, KERN_ERR, "failed to read PMP " |
| 213 | "GSCR[%d] (Emask=0x%x)\n", reg, err_mask); |
| 214 | return -EIO; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 215 | } |
| 216 | } |
| 217 | |
| 218 | return 0; |
| 219 | } |
| 220 | |
| 221 | static const char *sata_pmp_spec_rev_str(const u32 *gscr) |
| 222 | { |
| 223 | u32 rev = gscr[SATA_PMP_GSCR_REV]; |
| 224 | |
Shane Huang | deeb003 | 2009-09-08 17:37:01 +0800 | [diff] [blame] | 225 | if (rev & (1 << 3)) |
| 226 | return "1.2"; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 227 | if (rev & (1 << 2)) |
| 228 | return "1.1"; |
| 229 | if (rev & (1 << 1)) |
| 230 | return "1.0"; |
| 231 | return "<unknown>"; |
| 232 | } |
| 233 | |
Grant Grundler | 4f2c774 | 2010-04-14 18:43:32 -0700 | [diff] [blame] | 234 | #define PMP_GSCR_SII_POL 129 |
| 235 | |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 236 | static int sata_pmp_configure(struct ata_device *dev, int print_info) |
| 237 | { |
| 238 | struct ata_port *ap = dev->link->ap; |
| 239 | u32 *gscr = dev->gscr; |
Grant Grundler | 4f2c774 | 2010-04-14 18:43:32 -0700 | [diff] [blame] | 240 | u16 vendor = sata_pmp_gscr_vendor(gscr); |
| 241 | u16 devid = sata_pmp_gscr_devid(gscr); |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 242 | unsigned int err_mask = 0; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 243 | const char *reason; |
| 244 | int nr_ports, rc; |
| 245 | |
| 246 | nr_ports = sata_pmp_gscr_ports(gscr); |
| 247 | |
| 248 | if (nr_ports <= 0 || nr_ports > SATA_PMP_MAX_PORTS) { |
| 249 | rc = -EINVAL; |
| 250 | reason = "invalid nr_ports"; |
| 251 | goto fail; |
| 252 | } |
| 253 | |
| 254 | if ((ap->flags & ATA_FLAG_AN) && |
| 255 | (gscr[SATA_PMP_GSCR_FEAT] & SATA_PMP_FEAT_NOTIFY)) |
| 256 | dev->flags |= ATA_DFLAG_AN; |
| 257 | |
| 258 | /* monitor SERR_PHYRDY_CHG on fan-out ports */ |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 259 | err_mask = sata_pmp_write(dev->link, SATA_PMP_GSCR_ERROR_EN, |
| 260 | SERR_PHYRDY_CHG); |
| 261 | if (err_mask) { |
| 262 | rc = -EIO; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 263 | reason = "failed to write GSCR_ERROR_EN"; |
| 264 | goto fail; |
| 265 | } |
| 266 | |
Grant Grundler | 4f2c774 | 2010-04-14 18:43:32 -0700 | [diff] [blame] | 267 | /* Disable sending Early R_OK. |
| 268 | * With "cached read" HDD testing and multiple ports busy on a SATA |
| 269 | * host controller, 3726 PMP will very rarely drop a deferred |
| 270 | * R_OK that was intended for the host. Symptom will be all |
| 271 | * 5 drives under test will timeout, get reset, and recover. |
| 272 | */ |
| 273 | if (vendor == 0x1095 && devid == 0x3726) { |
| 274 | u32 reg; |
| 275 | |
| 276 | err_mask = sata_pmp_read(&ap->link, PMP_GSCR_SII_POL, ®); |
| 277 | if (err_mask) { |
| 278 | rc = -EIO; |
| 279 | reason = "failed to read Sil3726 Private Register"; |
| 280 | goto fail; |
| 281 | } |
| 282 | reg &= ~0x1; |
| 283 | err_mask = sata_pmp_write(&ap->link, PMP_GSCR_SII_POL, reg); |
| 284 | if (err_mask) { |
| 285 | rc = -EIO; |
| 286 | reason = "failed to write Sil3726 Private Register"; |
| 287 | goto fail; |
| 288 | } |
| 289 | } |
| 290 | |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 291 | if (print_info) { |
| 292 | ata_dev_printk(dev, KERN_INFO, "Port Multiplier %s, " |
| 293 | "0x%04x:0x%04x r%d, %d ports, feat 0x%x/0x%x\n", |
Grant Grundler | 4f2c774 | 2010-04-14 18:43:32 -0700 | [diff] [blame] | 294 | sata_pmp_spec_rev_str(gscr), vendor, devid, |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 295 | sata_pmp_gscr_rev(gscr), |
| 296 | nr_ports, gscr[SATA_PMP_GSCR_FEAT_EN], |
| 297 | gscr[SATA_PMP_GSCR_FEAT]); |
| 298 | |
| 299 | if (!(dev->flags & ATA_DFLAG_AN)) |
| 300 | ata_dev_printk(dev, KERN_INFO, |
| 301 | "Asynchronous notification not supported, " |
| 302 | "hotplug won't\n work on fan-out " |
| 303 | "ports. Use warm-plug instead.\n"); |
| 304 | } |
| 305 | |
| 306 | return 0; |
| 307 | |
| 308 | fail: |
| 309 | ata_dev_printk(dev, KERN_ERR, |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 310 | "failed to configure Port Multiplier (%s, Emask=0x%x)\n", |
| 311 | reason, err_mask); |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 312 | return rc; |
| 313 | } |
| 314 | |
| 315 | static int sata_pmp_init_links(struct ata_port *ap, int nr_ports) |
| 316 | { |
| 317 | struct ata_link *pmp_link = ap->pmp_link; |
| 318 | int i; |
| 319 | |
| 320 | if (!pmp_link) { |
| 321 | pmp_link = kzalloc(sizeof(pmp_link[0]) * SATA_PMP_MAX_PORTS, |
| 322 | GFP_NOIO); |
| 323 | if (!pmp_link) |
| 324 | return -ENOMEM; |
| 325 | |
| 326 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) |
| 327 | ata_link_init(ap, &pmp_link[i], i); |
| 328 | |
| 329 | ap->pmp_link = pmp_link; |
| 330 | } |
| 331 | |
| 332 | for (i = 0; i < nr_ports; i++) { |
| 333 | struct ata_link *link = &pmp_link[i]; |
| 334 | struct ata_eh_context *ehc = &link->eh_context; |
| 335 | |
| 336 | link->flags = 0; |
Tejun Heo | b558edd | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 337 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 338 | ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 339 | } |
| 340 | |
| 341 | return 0; |
| 342 | } |
| 343 | |
| 344 | static void sata_pmp_quirks(struct ata_port *ap) |
| 345 | { |
| 346 | u32 *gscr = ap->link.device->gscr; |
| 347 | u16 vendor = sata_pmp_gscr_vendor(gscr); |
| 348 | u16 devid = sata_pmp_gscr_devid(gscr); |
| 349 | struct ata_link *link; |
| 350 | |
| 351 | if (vendor == 0x1095 && devid == 0x3726) { |
| 352 | /* sil3726 quirks */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 353 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 19ef9d5 | 2008-05-21 14:11:24 +0900 | [diff] [blame] | 354 | /* Class code report is unreliable and SRST |
| 355 | * times out under certain configurations. |
| 356 | */ |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 357 | if (link->pmp < 5) |
Tejun Heo | 19ef9d5 | 2008-05-21 14:11:24 +0900 | [diff] [blame] | 358 | link->flags |= ATA_LFLAG_NO_SRST | |
| 359 | ATA_LFLAG_ASSUME_ATA; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 360 | |
| 361 | /* port 5 is for SEMB device and it doesn't like SRST */ |
| 362 | if (link->pmp == 5) |
| 363 | link->flags |= ATA_LFLAG_NO_SRST | |
| 364 | ATA_LFLAG_ASSUME_SEMB; |
| 365 | } |
| 366 | } else if (vendor == 0x1095 && devid == 0x4723) { |
| 367 | /* sil4723 quirks */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 368 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 369 | /* class code report is unreliable */ |
| 370 | if (link->pmp < 2) |
| 371 | link->flags |= ATA_LFLAG_ASSUME_ATA; |
| 372 | |
| 373 | /* the config device at port 2 locks up on SRST */ |
| 374 | if (link->pmp == 2) |
| 375 | link->flags |= ATA_LFLAG_NO_SRST | |
| 376 | ATA_LFLAG_ASSUME_ATA; |
| 377 | } |
| 378 | } else if (vendor == 0x1095 && devid == 0x4726) { |
| 379 | /* sil4726 quirks */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 380 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 8048307 | 2008-01-10 13:38:46 +0900 | [diff] [blame] | 381 | /* Class code report is unreliable and SRST |
| 382 | * times out under certain configurations. |
| 383 | * Config device can be at port 0 or 5 and |
| 384 | * locks up on SRST. |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 385 | */ |
Tejun Heo | 8048307 | 2008-01-10 13:38:46 +0900 | [diff] [blame] | 386 | if (link->pmp <= 5) |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 387 | link->flags |= ATA_LFLAG_NO_SRST | |
| 388 | ATA_LFLAG_ASSUME_ATA; |
| 389 | |
| 390 | /* Port 6 is for SEMB device which doesn't |
| 391 | * like SRST either. |
| 392 | */ |
| 393 | if (link->pmp == 6) |
| 394 | link->flags |= ATA_LFLAG_NO_SRST | |
| 395 | ATA_LFLAG_ASSUME_SEMB; |
| 396 | } |
| 397 | } else if (vendor == 0x1095 && (devid == 0x5723 || devid == 0x5733 || |
| 398 | devid == 0x5734 || devid == 0x5744)) { |
| 399 | /* sil5723/5744 quirks */ |
| 400 | |
| 401 | /* sil5723/5744 has either two or three downstream |
| 402 | * ports depending on operation mode. The last port |
| 403 | * is empty if any actual IO device is available or |
| 404 | * occupied by a pseudo configuration device |
| 405 | * otherwise. Don't try hard to recover it. |
| 406 | */ |
| 407 | ap->pmp_link[ap->nr_pmp_links - 1].flags |= ATA_LFLAG_NO_RETRY; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 408 | } |
| 409 | } |
| 410 | |
| 411 | /** |
| 412 | * sata_pmp_attach - attach a SATA PMP device |
| 413 | * @dev: SATA PMP device to attach |
| 414 | * |
| 415 | * Configure and attach SATA PMP device @dev. This function is |
| 416 | * also responsible for allocating and initializing PMP links. |
| 417 | * |
| 418 | * LOCKING: |
| 419 | * Kernel thread context (may sleep). |
| 420 | * |
| 421 | * RETURNS: |
| 422 | * 0 on success, -errno on failure. |
| 423 | */ |
| 424 | int sata_pmp_attach(struct ata_device *dev) |
| 425 | { |
| 426 | struct ata_link *link = dev->link; |
| 427 | struct ata_port *ap = link->ap; |
| 428 | unsigned long flags; |
| 429 | struct ata_link *tlink; |
| 430 | int rc; |
| 431 | |
| 432 | /* is it hanging off the right place? */ |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 433 | if (!sata_pmp_supported(ap)) { |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 434 | ata_dev_printk(dev, KERN_ERR, |
| 435 | "host does not support Port Multiplier\n"); |
| 436 | return -EINVAL; |
| 437 | } |
| 438 | |
| 439 | if (!ata_is_host_link(link)) { |
| 440 | ata_dev_printk(dev, KERN_ERR, |
| 441 | "Port Multipliers cannot be nested\n"); |
| 442 | return -EINVAL; |
| 443 | } |
| 444 | |
| 445 | if (dev->devno) { |
| 446 | ata_dev_printk(dev, KERN_ERR, |
| 447 | "Port Multiplier must be the first device\n"); |
| 448 | return -EINVAL; |
| 449 | } |
| 450 | |
| 451 | WARN_ON(link->pmp != 0); |
| 452 | link->pmp = SATA_PMP_CTRL_PORT; |
| 453 | |
| 454 | /* read GSCR block */ |
| 455 | rc = sata_pmp_read_gscr(dev, dev->gscr); |
| 456 | if (rc) |
| 457 | goto fail; |
| 458 | |
| 459 | /* config PMP */ |
| 460 | rc = sata_pmp_configure(dev, 1); |
| 461 | if (rc) |
| 462 | goto fail; |
| 463 | |
| 464 | rc = sata_pmp_init_links(ap, sata_pmp_gscr_ports(dev->gscr)); |
| 465 | if (rc) { |
| 466 | ata_dev_printk(dev, KERN_INFO, |
| 467 | "failed to initialize PMP links\n"); |
| 468 | goto fail; |
| 469 | } |
| 470 | |
| 471 | /* attach it */ |
| 472 | spin_lock_irqsave(ap->lock, flags); |
| 473 | WARN_ON(ap->nr_pmp_links); |
| 474 | ap->nr_pmp_links = sata_pmp_gscr_ports(dev->gscr); |
| 475 | spin_unlock_irqrestore(ap->lock, flags); |
| 476 | |
| 477 | sata_pmp_quirks(ap); |
| 478 | |
| 479 | if (ap->ops->pmp_attach) |
| 480 | ap->ops->pmp_attach(ap); |
| 481 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 482 | ata_for_each_link(tlink, ap, EDGE) |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 483 | sata_link_init_spd(tlink); |
| 484 | |
Tejun Heo | d0df8b5d | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 485 | ata_acpi_associate_sata_port(ap); |
| 486 | |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 487 | return 0; |
| 488 | |
| 489 | fail: |
| 490 | link->pmp = 0; |
| 491 | return rc; |
| 492 | } |
| 493 | |
| 494 | /** |
| 495 | * sata_pmp_detach - detach a SATA PMP device |
| 496 | * @dev: SATA PMP device to detach |
| 497 | * |
| 498 | * Detach SATA PMP device @dev. This function is also |
| 499 | * responsible for deconfiguring PMP links. |
| 500 | * |
| 501 | * LOCKING: |
| 502 | * Kernel thread context (may sleep). |
| 503 | */ |
| 504 | static void sata_pmp_detach(struct ata_device *dev) |
| 505 | { |
| 506 | struct ata_link *link = dev->link; |
| 507 | struct ata_port *ap = link->ap; |
| 508 | struct ata_link *tlink; |
| 509 | unsigned long flags; |
| 510 | |
| 511 | ata_dev_printk(dev, KERN_INFO, "Port Multiplier detaching\n"); |
| 512 | |
| 513 | WARN_ON(!ata_is_host_link(link) || dev->devno || |
| 514 | link->pmp != SATA_PMP_CTRL_PORT); |
| 515 | |
| 516 | if (ap->ops->pmp_detach) |
| 517 | ap->ops->pmp_detach(ap); |
| 518 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 519 | ata_for_each_link(tlink, ap, EDGE) |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 520 | ata_eh_detach_dev(tlink->device); |
| 521 | |
| 522 | spin_lock_irqsave(ap->lock, flags); |
| 523 | ap->nr_pmp_links = 0; |
| 524 | link->pmp = 0; |
| 525 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | d0df8b5d | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 526 | |
| 527 | ata_acpi_associate_sata_port(ap); |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 528 | } |
| 529 | |
| 530 | /** |
| 531 | * sata_pmp_same_pmp - does new GSCR matches the configured PMP? |
| 532 | * @dev: PMP device to compare against |
| 533 | * @new_gscr: GSCR block of the new device |
| 534 | * |
| 535 | * Compare @new_gscr against @dev and determine whether @dev is |
| 536 | * the PMP described by @new_gscr. |
| 537 | * |
| 538 | * LOCKING: |
| 539 | * None. |
| 540 | * |
| 541 | * RETURNS: |
| 542 | * 1 if @dev matches @new_gscr, 0 otherwise. |
| 543 | */ |
| 544 | static int sata_pmp_same_pmp(struct ata_device *dev, const u32 *new_gscr) |
| 545 | { |
| 546 | const u32 *old_gscr = dev->gscr; |
| 547 | u16 old_vendor, new_vendor, old_devid, new_devid; |
| 548 | int old_nr_ports, new_nr_ports; |
| 549 | |
| 550 | old_vendor = sata_pmp_gscr_vendor(old_gscr); |
| 551 | new_vendor = sata_pmp_gscr_vendor(new_gscr); |
| 552 | old_devid = sata_pmp_gscr_devid(old_gscr); |
| 553 | new_devid = sata_pmp_gscr_devid(new_gscr); |
| 554 | old_nr_ports = sata_pmp_gscr_ports(old_gscr); |
| 555 | new_nr_ports = sata_pmp_gscr_ports(new_gscr); |
| 556 | |
| 557 | if (old_vendor != new_vendor) { |
| 558 | ata_dev_printk(dev, KERN_INFO, "Port Multiplier " |
| 559 | "vendor mismatch '0x%x' != '0x%x'\n", |
| 560 | old_vendor, new_vendor); |
| 561 | return 0; |
| 562 | } |
| 563 | |
| 564 | if (old_devid != new_devid) { |
| 565 | ata_dev_printk(dev, KERN_INFO, "Port Multiplier " |
| 566 | "device ID mismatch '0x%x' != '0x%x'\n", |
| 567 | old_devid, new_devid); |
| 568 | return 0; |
| 569 | } |
| 570 | |
| 571 | if (old_nr_ports != new_nr_ports) { |
| 572 | ata_dev_printk(dev, KERN_INFO, "Port Multiplier " |
| 573 | "nr_ports mismatch '0x%x' != '0x%x'\n", |
| 574 | old_nr_ports, new_nr_ports); |
| 575 | return 0; |
| 576 | } |
| 577 | |
| 578 | return 1; |
| 579 | } |
| 580 | |
| 581 | /** |
| 582 | * sata_pmp_revalidate - revalidate SATA PMP |
| 583 | * @dev: PMP device to revalidate |
| 584 | * @new_class: new class code |
| 585 | * |
| 586 | * Re-read GSCR block and make sure @dev is still attached to the |
| 587 | * port and properly configured. |
| 588 | * |
| 589 | * LOCKING: |
| 590 | * Kernel thread context (may sleep). |
| 591 | * |
| 592 | * RETURNS: |
| 593 | * 0 on success, -errno otherwise. |
| 594 | */ |
| 595 | static int sata_pmp_revalidate(struct ata_device *dev, unsigned int new_class) |
| 596 | { |
| 597 | struct ata_link *link = dev->link; |
| 598 | struct ata_port *ap = link->ap; |
| 599 | u32 *gscr = (void *)ap->sector_buf; |
| 600 | int rc; |
| 601 | |
| 602 | DPRINTK("ENTER\n"); |
| 603 | |
| 604 | ata_eh_about_to_do(link, NULL, ATA_EH_REVALIDATE); |
| 605 | |
| 606 | if (!ata_dev_enabled(dev)) { |
| 607 | rc = -ENODEV; |
| 608 | goto fail; |
| 609 | } |
| 610 | |
| 611 | /* wrong class? */ |
| 612 | if (ata_class_enabled(new_class) && new_class != ATA_DEV_PMP) { |
| 613 | rc = -ENODEV; |
| 614 | goto fail; |
| 615 | } |
| 616 | |
| 617 | /* read GSCR */ |
| 618 | rc = sata_pmp_read_gscr(dev, gscr); |
| 619 | if (rc) |
| 620 | goto fail; |
| 621 | |
| 622 | /* is the pmp still there? */ |
| 623 | if (!sata_pmp_same_pmp(dev, gscr)) { |
| 624 | rc = -ENODEV; |
| 625 | goto fail; |
| 626 | } |
| 627 | |
| 628 | memcpy(dev->gscr, gscr, sizeof(gscr[0]) * SATA_PMP_GSCR_DWORDS); |
| 629 | |
| 630 | rc = sata_pmp_configure(dev, 0); |
| 631 | if (rc) |
| 632 | goto fail; |
| 633 | |
| 634 | ata_eh_done(link, NULL, ATA_EH_REVALIDATE); |
| 635 | |
| 636 | DPRINTK("EXIT, rc=0\n"); |
| 637 | return 0; |
| 638 | |
| 639 | fail: |
| 640 | ata_dev_printk(dev, KERN_ERR, |
| 641 | "PMP revalidation failed (errno=%d)\n", rc); |
| 642 | DPRINTK("EXIT, rc=%d\n", rc); |
| 643 | return rc; |
| 644 | } |
| 645 | |
| 646 | /** |
| 647 | * sata_pmp_revalidate_quick - revalidate SATA PMP quickly |
| 648 | * @dev: PMP device to revalidate |
| 649 | * |
| 650 | * Make sure the attached PMP is accessible. |
| 651 | * |
| 652 | * LOCKING: |
| 653 | * Kernel thread context (may sleep). |
| 654 | * |
| 655 | * RETURNS: |
| 656 | * 0 on success, -errno otherwise. |
| 657 | */ |
| 658 | static int sata_pmp_revalidate_quick(struct ata_device *dev) |
| 659 | { |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 660 | unsigned int err_mask; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 661 | u32 prod_id; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 662 | |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 663 | err_mask = sata_pmp_read(dev->link, SATA_PMP_GSCR_PROD_ID, &prod_id); |
| 664 | if (err_mask) { |
| 665 | ata_dev_printk(dev, KERN_ERR, "failed to read PMP product ID " |
| 666 | "(Emask=0x%x)\n", err_mask); |
| 667 | return -EIO; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 668 | } |
| 669 | |
| 670 | if (prod_id != dev->gscr[SATA_PMP_GSCR_PROD_ID]) { |
| 671 | ata_dev_printk(dev, KERN_ERR, "PMP product ID mismatch\n"); |
| 672 | /* something weird is going on, request full PMP recovery */ |
| 673 | return -EIO; |
| 674 | } |
| 675 | |
| 676 | return 0; |
| 677 | } |
| 678 | |
| 679 | /** |
| 680 | * sata_pmp_eh_recover_pmp - recover PMP |
| 681 | * @ap: ATA port PMP is attached to |
| 682 | * @prereset: prereset method (can be NULL) |
| 683 | * @softreset: softreset method |
| 684 | * @hardreset: hardreset method |
| 685 | * @postreset: postreset method (can be NULL) |
| 686 | * |
| 687 | * Recover PMP attached to @ap. Recovery procedure is somewhat |
| 688 | * similar to that of ata_eh_recover() except that reset should |
| 689 | * always be performed in hard->soft sequence and recovery |
| 690 | * failure results in PMP detachment. |
| 691 | * |
| 692 | * LOCKING: |
| 693 | * Kernel thread context (may sleep). |
| 694 | * |
| 695 | * RETURNS: |
| 696 | * 0 on success, -errno on failure. |
| 697 | */ |
| 698 | static int sata_pmp_eh_recover_pmp(struct ata_port *ap, |
| 699 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, |
| 700 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) |
| 701 | { |
| 702 | struct ata_link *link = &ap->link; |
| 703 | struct ata_eh_context *ehc = &link->eh_context; |
| 704 | struct ata_device *dev = link->device; |
| 705 | int tries = ATA_EH_PMP_TRIES; |
| 706 | int detach = 0, rc = 0; |
| 707 | int reval_failed = 0; |
| 708 | |
| 709 | DPRINTK("ENTER\n"); |
| 710 | |
| 711 | if (dev->flags & ATA_DFLAG_DETACH) { |
| 712 | detach = 1; |
| 713 | goto fail; |
| 714 | } |
| 715 | |
| 716 | retry: |
| 717 | ehc->classes[0] = ATA_DEV_UNKNOWN; |
| 718 | |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 719 | if (ehc->i.action & ATA_EH_RESET) { |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 720 | struct ata_link *tlink; |
| 721 | |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 722 | /* reset */ |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 723 | rc = ata_eh_reset(link, 0, prereset, softreset, hardreset, |
| 724 | postreset); |
| 725 | if (rc) { |
| 726 | ata_link_printk(link, KERN_ERR, |
| 727 | "failed to reset PMP, giving up\n"); |
| 728 | goto fail; |
| 729 | } |
| 730 | |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 731 | /* PMP is reset, SErrors cannot be trusted, scan all */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 732 | ata_for_each_link(tlink, ap, EDGE) { |
Tejun Heo | b558edd | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 733 | struct ata_eh_context *ehc = &tlink->eh_context; |
| 734 | |
| 735 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
| 736 | ehc->i.action |= ATA_EH_RESET; |
| 737 | } |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 738 | } |
| 739 | |
| 740 | /* If revalidation is requested, revalidate and reconfigure; |
| 741 | * otherwise, do quick revalidation. |
| 742 | */ |
| 743 | if (ehc->i.action & ATA_EH_REVALIDATE) |
| 744 | rc = sata_pmp_revalidate(dev, ehc->classes[0]); |
| 745 | else |
| 746 | rc = sata_pmp_revalidate_quick(dev); |
| 747 | |
| 748 | if (rc) { |
| 749 | tries--; |
| 750 | |
| 751 | if (rc == -ENODEV) { |
Tejun Heo | b558edd | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 752 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 753 | detach = 1; |
| 754 | /* give it just two more chances */ |
| 755 | tries = min(tries, 2); |
| 756 | } |
| 757 | |
| 758 | if (tries) { |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 759 | /* consecutive revalidation failures? speed down */ |
| 760 | if (reval_failed) |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 761 | sata_down_spd_limit(link, 0); |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 762 | else |
| 763 | reval_failed = 1; |
| 764 | |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 765 | ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 766 | goto retry; |
| 767 | } else { |
| 768 | ata_dev_printk(dev, KERN_ERR, "failed to recover PMP " |
| 769 | "after %d tries, giving up\n", |
| 770 | ATA_EH_PMP_TRIES); |
| 771 | goto fail; |
| 772 | } |
| 773 | } |
| 774 | |
| 775 | /* okay, PMP resurrected */ |
| 776 | ehc->i.flags = 0; |
| 777 | |
| 778 | DPRINTK("EXIT, rc=0\n"); |
| 779 | return 0; |
| 780 | |
| 781 | fail: |
| 782 | sata_pmp_detach(dev); |
| 783 | if (detach) |
| 784 | ata_eh_detach_dev(dev); |
| 785 | else |
| 786 | ata_dev_disable(dev); |
| 787 | |
| 788 | DPRINTK("EXIT, rc=%d\n", rc); |
| 789 | return rc; |
| 790 | } |
| 791 | |
| 792 | static int sata_pmp_eh_handle_disabled_links(struct ata_port *ap) |
| 793 | { |
| 794 | struct ata_link *link; |
| 795 | unsigned long flags; |
| 796 | int rc; |
| 797 | |
| 798 | spin_lock_irqsave(ap->lock, flags); |
| 799 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 800 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 801 | if (!(link->flags & ATA_LFLAG_DISABLED)) |
| 802 | continue; |
| 803 | |
| 804 | spin_unlock_irqrestore(ap->lock, flags); |
| 805 | |
| 806 | /* Some PMPs require hardreset sequence to get |
| 807 | * SError.N working. |
| 808 | */ |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 809 | sata_link_hardreset(link, sata_deb_timing_normal, |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 810 | ata_deadline(jiffies, ATA_TMOUT_INTERNAL_QUICK), |
| 811 | NULL, NULL); |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 812 | |
| 813 | /* unconditionally clear SError.N */ |
| 814 | rc = sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG); |
| 815 | if (rc) { |
| 816 | ata_link_printk(link, KERN_ERR, "failed to clear " |
| 817 | "SError.N (errno=%d)\n", rc); |
| 818 | return rc; |
| 819 | } |
| 820 | |
| 821 | spin_lock_irqsave(ap->lock, flags); |
| 822 | } |
| 823 | |
| 824 | spin_unlock_irqrestore(ap->lock, flags); |
| 825 | |
| 826 | return 0; |
| 827 | } |
| 828 | |
| 829 | static int sata_pmp_handle_link_fail(struct ata_link *link, int *link_tries) |
| 830 | { |
| 831 | struct ata_port *ap = link->ap; |
| 832 | unsigned long flags; |
| 833 | |
| 834 | if (link_tries[link->pmp] && --link_tries[link->pmp]) |
| 835 | return 1; |
| 836 | |
| 837 | /* disable this link */ |
| 838 | if (!(link->flags & ATA_LFLAG_DISABLED)) { |
| 839 | ata_link_printk(link, KERN_WARNING, |
| 840 | "failed to recover link after %d tries, disabling\n", |
| 841 | ATA_EH_PMP_LINK_TRIES); |
| 842 | |
| 843 | spin_lock_irqsave(ap->lock, flags); |
| 844 | link->flags |= ATA_LFLAG_DISABLED; |
| 845 | spin_unlock_irqrestore(ap->lock, flags); |
| 846 | } |
| 847 | |
| 848 | ata_dev_disable(link->device); |
| 849 | link->eh_context.i.action = 0; |
| 850 | |
| 851 | return 0; |
| 852 | } |
| 853 | |
| 854 | /** |
| 855 | * sata_pmp_eh_recover - recover PMP-enabled port |
| 856 | * @ap: ATA port to recover |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 857 | * |
| 858 | * Drive EH recovery operation for PMP enabled port @ap. This |
| 859 | * function recovers host and PMP ports with proper retrials and |
| 860 | * fallbacks. Actual recovery operations are performed using |
| 861 | * ata_eh_recover() and sata_pmp_eh_recover_pmp(). |
| 862 | * |
| 863 | * LOCKING: |
| 864 | * Kernel thread context (may sleep). |
| 865 | * |
| 866 | * RETURNS: |
| 867 | * 0 on success, -errno on failure. |
| 868 | */ |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 869 | static int sata_pmp_eh_recover(struct ata_port *ap) |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 870 | { |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 871 | struct ata_port_operations *ops = ap->ops; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 872 | int pmp_tries, link_tries[SATA_PMP_MAX_PORTS]; |
| 873 | struct ata_link *pmp_link = &ap->link; |
| 874 | struct ata_device *pmp_dev = pmp_link->device; |
| 875 | struct ata_eh_context *pmp_ehc = &pmp_link->eh_context; |
Tejun Heo | f1bbfb9 | 2008-05-19 01:15:11 +0900 | [diff] [blame] | 876 | u32 *gscr = pmp_dev->gscr; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 877 | struct ata_link *link; |
| 878 | struct ata_device *dev; |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 879 | unsigned int err_mask; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 880 | u32 gscr_error, sntf; |
| 881 | int cnt, rc; |
| 882 | |
| 883 | pmp_tries = ATA_EH_PMP_TRIES; |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 884 | ata_for_each_link(link, ap, EDGE) |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 885 | link_tries[link->pmp] = ATA_EH_PMP_LINK_TRIES; |
| 886 | |
| 887 | retry: |
| 888 | /* PMP attached? */ |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 889 | if (!sata_pmp_attached(ap)) { |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 890 | rc = ata_eh_recover(ap, ops->prereset, ops->softreset, |
| 891 | ops->hardreset, ops->postreset, NULL); |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 892 | if (rc) { |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 893 | ata_for_each_dev(dev, &ap->link, ALL) |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 894 | ata_dev_disable(dev); |
| 895 | return rc; |
| 896 | } |
| 897 | |
| 898 | if (pmp_dev->class != ATA_DEV_PMP) |
| 899 | return 0; |
| 900 | |
| 901 | /* new PMP online */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 902 | ata_for_each_link(link, ap, EDGE) |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 903 | link_tries[link->pmp] = ATA_EH_PMP_LINK_TRIES; |
| 904 | |
| 905 | /* fall through */ |
| 906 | } |
| 907 | |
| 908 | /* recover pmp */ |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 909 | rc = sata_pmp_eh_recover_pmp(ap, ops->prereset, ops->softreset, |
| 910 | ops->hardreset, ops->postreset); |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 911 | if (rc) |
| 912 | goto pmp_fail; |
| 913 | |
Tejun Heo | f1bbfb9 | 2008-05-19 01:15:11 +0900 | [diff] [blame] | 914 | /* PHY event notification can disturb reset and other recovery |
| 915 | * operations. Turn it off. |
| 916 | */ |
| 917 | if (gscr[SATA_PMP_GSCR_FEAT_EN] & SATA_PMP_FEAT_NOTIFY) { |
| 918 | gscr[SATA_PMP_GSCR_FEAT_EN] &= ~SATA_PMP_FEAT_NOTIFY; |
| 919 | |
| 920 | err_mask = sata_pmp_write(pmp_link, SATA_PMP_GSCR_FEAT_EN, |
| 921 | gscr[SATA_PMP_GSCR_FEAT_EN]); |
| 922 | if (err_mask) { |
| 923 | ata_link_printk(pmp_link, KERN_WARNING, |
| 924 | "failed to disable NOTIFY (err_mask=0x%x)\n", |
| 925 | err_mask); |
| 926 | goto pmp_fail; |
| 927 | } |
| 928 | } |
| 929 | |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 930 | /* handle disabled links */ |
| 931 | rc = sata_pmp_eh_handle_disabled_links(ap); |
| 932 | if (rc) |
| 933 | goto pmp_fail; |
| 934 | |
| 935 | /* recover links */ |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 936 | rc = ata_eh_recover(ap, ops->pmp_prereset, ops->pmp_softreset, |
| 937 | ops->pmp_hardreset, ops->pmp_postreset, &link); |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 938 | if (rc) |
| 939 | goto link_fail; |
| 940 | |
| 941 | /* Connection status might have changed while resetting other |
| 942 | * links, check SATA_PMP_GSCR_ERROR before returning. |
| 943 | */ |
| 944 | |
| 945 | /* clear SNotification */ |
| 946 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); |
| 947 | if (rc == 0) |
| 948 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); |
| 949 | |
| 950 | /* enable notification */ |
| 951 | if (pmp_dev->flags & ATA_DFLAG_AN) { |
Tejun Heo | f1bbfb9 | 2008-05-19 01:15:11 +0900 | [diff] [blame] | 952 | gscr[SATA_PMP_GSCR_FEAT_EN] |= SATA_PMP_FEAT_NOTIFY; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 953 | |
Tejun Heo | f1bbfb9 | 2008-05-19 01:15:11 +0900 | [diff] [blame] | 954 | err_mask = sata_pmp_write(pmp_link, SATA_PMP_GSCR_FEAT_EN, |
| 955 | gscr[SATA_PMP_GSCR_FEAT_EN]); |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 956 | if (err_mask) { |
| 957 | ata_dev_printk(pmp_dev, KERN_ERR, "failed to write " |
| 958 | "PMP_FEAT_EN (Emask=0x%x)\n", err_mask); |
| 959 | rc = -EIO; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 960 | goto pmp_fail; |
| 961 | } |
| 962 | } |
| 963 | |
| 964 | /* check GSCR_ERROR */ |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 965 | err_mask = sata_pmp_read(pmp_link, SATA_PMP_GSCR_ERROR, &gscr_error); |
| 966 | if (err_mask) { |
| 967 | ata_dev_printk(pmp_dev, KERN_ERR, "failed to read " |
| 968 | "PMP_GSCR_ERROR (Emask=0x%x)\n", err_mask); |
| 969 | rc = -EIO; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 970 | goto pmp_fail; |
| 971 | } |
| 972 | |
| 973 | cnt = 0; |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 974 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 975 | if (!(gscr_error & (1 << link->pmp))) |
| 976 | continue; |
| 977 | |
| 978 | if (sata_pmp_handle_link_fail(link, link_tries)) { |
| 979 | ata_ehi_hotplugged(&link->eh_context.i); |
| 980 | cnt++; |
| 981 | } else { |
| 982 | ata_link_printk(link, KERN_WARNING, |
| 983 | "PHY status changed but maxed out on retries, " |
| 984 | "giving up\n"); |
| 985 | ata_link_printk(link, KERN_WARNING, |
| 986 | "Manully issue scan to resume this link\n"); |
| 987 | } |
| 988 | } |
| 989 | |
| 990 | if (cnt) { |
| 991 | ata_port_printk(ap, KERN_INFO, "PMP SError.N set for some " |
| 992 | "ports, repeating recovery\n"); |
| 993 | goto retry; |
| 994 | } |
| 995 | |
| 996 | return 0; |
| 997 | |
| 998 | link_fail: |
| 999 | if (sata_pmp_handle_link_fail(link, link_tries)) { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1000 | pmp_ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 1001 | goto retry; |
| 1002 | } |
| 1003 | |
| 1004 | /* fall through */ |
| 1005 | pmp_fail: |
| 1006 | /* Control always ends up here after detaching PMP. Shut up |
| 1007 | * and return if we're unloading. |
| 1008 | */ |
| 1009 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
| 1010 | return rc; |
| 1011 | |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 1012 | if (!sata_pmp_attached(ap)) |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 1013 | goto retry; |
| 1014 | |
| 1015 | if (--pmp_tries) { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1016 | pmp_ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 1017 | goto retry; |
| 1018 | } |
| 1019 | |
| 1020 | ata_port_printk(ap, KERN_ERR, |
| 1021 | "failed to recover PMP after %d tries, giving up\n", |
| 1022 | ATA_EH_PMP_TRIES); |
| 1023 | sata_pmp_detach(pmp_dev); |
| 1024 | ata_dev_disable(pmp_dev); |
| 1025 | |
| 1026 | return rc; |
| 1027 | } |
| 1028 | |
| 1029 | /** |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 1030 | * sata_pmp_error_handler - do standard error handling for PMP-enabled host |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 1031 | * @ap: host port to handle error for |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 1032 | * |
| 1033 | * Perform standard error handling sequence for PMP-enabled host |
| 1034 | * @ap. |
| 1035 | * |
| 1036 | * LOCKING: |
| 1037 | * Kernel thread context (may sleep). |
| 1038 | */ |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 1039 | void sata_pmp_error_handler(struct ata_port *ap) |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 1040 | { |
| 1041 | ata_eh_autopsy(ap); |
| 1042 | ata_eh_report(ap); |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 1043 | sata_pmp_eh_recover(ap); |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 1044 | ata_eh_finish(ap); |
| 1045 | } |
Tejun Heo | 48515f6 | 2008-04-07 22:47:21 +0900 | [diff] [blame] | 1046 | |
| 1047 | EXPORT_SYMBOL_GPL(sata_pmp_port_ops); |
| 1048 | EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch); |
| 1049 | EXPORT_SYMBOL_GPL(sata_pmp_error_handler); |