Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 1 | /**************************************************************************** |
| 2 | * Driver for Solarflare Solarstorm network controllers and boards |
| 3 | * Copyright 2005-2006 Fen Systems Ltd. |
Ben Hutchings | 906bb26 | 2009-11-29 15:16:19 +0000 | [diff] [blame] | 4 | * Copyright 2006-2009 Solarflare Communications Inc. |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published |
| 8 | * by the Free Software Foundation, incorporated herein by reference. |
| 9 | */ |
| 10 | |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 11 | #include <linux/bitops.h> |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 12 | #include <linux/module.h> |
| 13 | #include <linux/mtd/mtd.h> |
| 14 | #include <linux/delay.h> |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 15 | #include <linux/rtnetlink.h> |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 16 | |
| 17 | #define EFX_DRIVER_NAME "sfc_mtd" |
| 18 | #include "net_driver.h" |
| 19 | #include "spi.h" |
Hannes Eder | ff2ef90 | 2009-02-18 17:49:50 -0800 | [diff] [blame] | 20 | #include "efx.h" |
Ben Hutchings | 744093c | 2009-11-29 15:12:08 +0000 | [diff] [blame] | 21 | #include "nic.h" |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 22 | #include "mcdi.h" |
| 23 | #include "mcdi_pcol.h" |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 24 | |
| 25 | #define EFX_SPI_VERIFY_BUF_LEN 16 |
| 26 | |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 27 | struct efx_mtd_partition { |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 28 | struct mtd_info mtd; |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 29 | union { |
| 30 | struct { |
| 31 | bool updating; |
| 32 | u8 nvram_type; |
| 33 | u16 fw_subtype; |
| 34 | } mcdi; |
| 35 | size_t offset; |
| 36 | }; |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 37 | const char *type_name; |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 38 | char name[IFNAMSIZ + 20]; |
| 39 | }; |
| 40 | |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 41 | struct efx_mtd_ops { |
| 42 | int (*read)(struct mtd_info *mtd, loff_t start, size_t len, |
| 43 | size_t *retlen, u8 *buffer); |
| 44 | int (*erase)(struct mtd_info *mtd, loff_t start, size_t len); |
| 45 | int (*write)(struct mtd_info *mtd, loff_t start, size_t len, |
| 46 | size_t *retlen, const u8 *buffer); |
| 47 | int (*sync)(struct mtd_info *mtd); |
| 48 | }; |
| 49 | |
| 50 | struct efx_mtd { |
| 51 | struct list_head node; |
| 52 | struct efx_nic *efx; |
| 53 | const struct efx_spi_device *spi; |
| 54 | const char *name; |
| 55 | const struct efx_mtd_ops *ops; |
| 56 | size_t n_parts; |
| 57 | struct efx_mtd_partition part[0]; |
| 58 | }; |
| 59 | |
| 60 | #define efx_for_each_partition(part, efx_mtd) \ |
| 61 | for ((part) = &(efx_mtd)->part[0]; \ |
| 62 | (part) != &(efx_mtd)->part[(efx_mtd)->n_parts]; \ |
| 63 | (part)++) |
| 64 | |
| 65 | #define to_efx_mtd_partition(mtd) \ |
| 66 | container_of(mtd, struct efx_mtd_partition, mtd) |
| 67 | |
| 68 | static int falcon_mtd_probe(struct efx_nic *efx); |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 69 | static int siena_mtd_probe(struct efx_nic *efx); |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 70 | |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 71 | /* SPI utilities */ |
| 72 | |
| 73 | static int efx_spi_slow_wait(struct efx_mtd *efx_mtd, bool uninterruptible) |
| 74 | { |
| 75 | const struct efx_spi_device *spi = efx_mtd->spi; |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 76 | struct efx_nic *efx = efx_mtd->efx; |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 77 | u8 status; |
| 78 | int rc, i; |
| 79 | |
| 80 | /* Wait up to 4s for flash/EEPROM to finish a slow operation. */ |
| 81 | for (i = 0; i < 40; i++) { |
| 82 | __set_current_state(uninterruptible ? |
| 83 | TASK_UNINTERRUPTIBLE : TASK_INTERRUPTIBLE); |
| 84 | schedule_timeout(HZ / 10); |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 85 | rc = falcon_spi_cmd(efx, spi, SPI_RDSR, -1, NULL, |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 86 | &status, sizeof(status)); |
| 87 | if (rc) |
| 88 | return rc; |
| 89 | if (!(status & SPI_STATUS_NRDY)) |
| 90 | return 0; |
| 91 | if (signal_pending(current)) |
| 92 | return -EINTR; |
| 93 | } |
| 94 | EFX_ERR(efx, "timed out waiting for %s\n", efx_mtd->name); |
| 95 | return -ETIMEDOUT; |
| 96 | } |
| 97 | |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 98 | static int |
| 99 | efx_spi_unlock(struct efx_nic *efx, const struct efx_spi_device *spi) |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 100 | { |
| 101 | const u8 unlock_mask = (SPI_STATUS_BP2 | SPI_STATUS_BP1 | |
| 102 | SPI_STATUS_BP0); |
| 103 | u8 status; |
| 104 | int rc; |
| 105 | |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 106 | rc = falcon_spi_cmd(efx, spi, SPI_RDSR, -1, NULL, |
| 107 | &status, sizeof(status)); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 108 | if (rc) |
| 109 | return rc; |
| 110 | |
| 111 | if (!(status & unlock_mask)) |
| 112 | return 0; /* already unlocked */ |
| 113 | |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 114 | rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 115 | if (rc) |
| 116 | return rc; |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 117 | rc = falcon_spi_cmd(efx, spi, SPI_SST_EWSR, -1, NULL, NULL, 0); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 118 | if (rc) |
| 119 | return rc; |
| 120 | |
| 121 | status &= ~unlock_mask; |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 122 | rc = falcon_spi_cmd(efx, spi, SPI_WRSR, -1, &status, |
| 123 | NULL, sizeof(status)); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 124 | if (rc) |
| 125 | return rc; |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 126 | rc = falcon_spi_wait_write(efx, spi); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 127 | if (rc) |
| 128 | return rc; |
| 129 | |
| 130 | return 0; |
| 131 | } |
| 132 | |
| 133 | static int efx_spi_erase(struct efx_mtd *efx_mtd, loff_t start, size_t len) |
| 134 | { |
| 135 | const struct efx_spi_device *spi = efx_mtd->spi; |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 136 | struct efx_nic *efx = efx_mtd->efx; |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 137 | unsigned pos, block_len; |
| 138 | u8 empty[EFX_SPI_VERIFY_BUF_LEN]; |
| 139 | u8 buffer[EFX_SPI_VERIFY_BUF_LEN]; |
| 140 | int rc; |
| 141 | |
| 142 | if (len != spi->erase_size) |
| 143 | return -EINVAL; |
| 144 | |
| 145 | if (spi->erase_command == 0) |
| 146 | return -EOPNOTSUPP; |
| 147 | |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 148 | rc = efx_spi_unlock(efx, spi); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 149 | if (rc) |
| 150 | return rc; |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 151 | rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 152 | if (rc) |
| 153 | return rc; |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 154 | rc = falcon_spi_cmd(efx, spi, spi->erase_command, start, NULL, |
| 155 | NULL, 0); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 156 | if (rc) |
| 157 | return rc; |
| 158 | rc = efx_spi_slow_wait(efx_mtd, false); |
| 159 | |
| 160 | /* Verify the entire region has been wiped */ |
| 161 | memset(empty, 0xff, sizeof(empty)); |
| 162 | for (pos = 0; pos < len; pos += block_len) { |
| 163 | block_len = min(len - pos, sizeof(buffer)); |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 164 | rc = falcon_spi_read(efx, spi, start + pos, block_len, |
| 165 | NULL, buffer); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 166 | if (rc) |
| 167 | return rc; |
| 168 | if (memcmp(empty, buffer, block_len)) |
| 169 | return -EIO; |
| 170 | |
| 171 | /* Avoid locking up the system */ |
| 172 | cond_resched(); |
| 173 | if (signal_pending(current)) |
| 174 | return -EINTR; |
| 175 | } |
| 176 | |
| 177 | return rc; |
| 178 | } |
| 179 | |
| 180 | /* MTD interface */ |
| 181 | |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 182 | static int efx_mtd_erase(struct mtd_info *mtd, struct erase_info *erase) |
| 183 | { |
| 184 | struct efx_mtd *efx_mtd = mtd->priv; |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 185 | int rc; |
| 186 | |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 187 | rc = efx_mtd->ops->erase(mtd, erase->addr, erase->len); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 188 | if (rc == 0) { |
| 189 | erase->state = MTD_ERASE_DONE; |
| 190 | } else { |
| 191 | erase->state = MTD_ERASE_FAILED; |
| 192 | erase->fail_addr = 0xffffffff; |
| 193 | } |
| 194 | mtd_erase_callback(erase); |
| 195 | return rc; |
| 196 | } |
| 197 | |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 198 | static void efx_mtd_sync(struct mtd_info *mtd) |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 199 | { |
| 200 | struct efx_mtd *efx_mtd = mtd->priv; |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 201 | struct efx_nic *efx = efx_mtd->efx; |
| 202 | int rc; |
| 203 | |
| 204 | rc = efx_mtd->ops->sync(mtd); |
| 205 | if (rc) |
| 206 | EFX_ERR(efx, "%s sync failed (%d)\n", efx_mtd->name, rc); |
| 207 | } |
| 208 | |
| 209 | static void efx_mtd_remove_partition(struct efx_mtd_partition *part) |
| 210 | { |
| 211 | int rc; |
| 212 | |
| 213 | for (;;) { |
| 214 | rc = del_mtd_device(&part->mtd); |
| 215 | if (rc != -EBUSY) |
| 216 | break; |
| 217 | ssleep(1); |
| 218 | } |
| 219 | WARN_ON(rc); |
| 220 | } |
| 221 | |
| 222 | static void efx_mtd_remove_device(struct efx_mtd *efx_mtd) |
| 223 | { |
| 224 | struct efx_mtd_partition *part; |
| 225 | |
| 226 | efx_for_each_partition(part, efx_mtd) |
| 227 | efx_mtd_remove_partition(part); |
| 228 | list_del(&efx_mtd->node); |
| 229 | kfree(efx_mtd); |
| 230 | } |
| 231 | |
| 232 | static void efx_mtd_rename_device(struct efx_mtd *efx_mtd) |
| 233 | { |
| 234 | struct efx_mtd_partition *part; |
| 235 | |
| 236 | efx_for_each_partition(part, efx_mtd) |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 237 | if (efx_nic_rev(efx_mtd->efx) >= EFX_REV_SIENA_A0) |
| 238 | snprintf(part->name, sizeof(part->name), |
| 239 | "%s %s:%02x", efx_mtd->efx->name, |
| 240 | part->type_name, part->mcdi.fw_subtype); |
| 241 | else |
| 242 | snprintf(part->name, sizeof(part->name), |
| 243 | "%s %s", efx_mtd->efx->name, |
| 244 | part->type_name); |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | static int efx_mtd_probe_device(struct efx_nic *efx, struct efx_mtd *efx_mtd) |
| 248 | { |
| 249 | struct efx_mtd_partition *part; |
| 250 | |
| 251 | efx_mtd->efx = efx; |
| 252 | |
| 253 | efx_mtd_rename_device(efx_mtd); |
| 254 | |
| 255 | efx_for_each_partition(part, efx_mtd) { |
| 256 | part->mtd.writesize = 1; |
| 257 | |
| 258 | part->mtd.owner = THIS_MODULE; |
| 259 | part->mtd.priv = efx_mtd; |
| 260 | part->mtd.name = part->name; |
| 261 | part->mtd.erase = efx_mtd_erase; |
| 262 | part->mtd.read = efx_mtd->ops->read; |
| 263 | part->mtd.write = efx_mtd->ops->write; |
| 264 | part->mtd.sync = efx_mtd_sync; |
| 265 | |
| 266 | if (add_mtd_device(&part->mtd)) |
| 267 | goto fail; |
| 268 | } |
| 269 | |
| 270 | list_add(&efx_mtd->node, &efx->mtd_list); |
| 271 | return 0; |
| 272 | |
| 273 | fail: |
| 274 | while (part != &efx_mtd->part[0]) { |
| 275 | --part; |
| 276 | efx_mtd_remove_partition(part); |
| 277 | } |
| 278 | /* add_mtd_device() returns 1 if the MTD table is full */ |
| 279 | return -ENOMEM; |
| 280 | } |
| 281 | |
| 282 | void efx_mtd_remove(struct efx_nic *efx) |
| 283 | { |
| 284 | struct efx_mtd *efx_mtd, *next; |
| 285 | |
| 286 | WARN_ON(efx_dev_registered(efx)); |
| 287 | |
| 288 | list_for_each_entry_safe(efx_mtd, next, &efx->mtd_list, node) |
| 289 | efx_mtd_remove_device(efx_mtd); |
| 290 | } |
| 291 | |
| 292 | void efx_mtd_rename(struct efx_nic *efx) |
| 293 | { |
| 294 | struct efx_mtd *efx_mtd; |
| 295 | |
| 296 | ASSERT_RTNL(); |
| 297 | |
| 298 | list_for_each_entry(efx_mtd, &efx->mtd_list, node) |
| 299 | efx_mtd_rename_device(efx_mtd); |
| 300 | } |
| 301 | |
| 302 | int efx_mtd_probe(struct efx_nic *efx) |
| 303 | { |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 304 | if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0) |
| 305 | return siena_mtd_probe(efx); |
| 306 | else |
| 307 | return falcon_mtd_probe(efx); |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | /* Implementation of MTD operations for Falcon */ |
| 311 | |
| 312 | static int falcon_mtd_read(struct mtd_info *mtd, loff_t start, |
| 313 | size_t len, size_t *retlen, u8 *buffer) |
| 314 | { |
| 315 | struct efx_mtd_partition *part = to_efx_mtd_partition(mtd); |
| 316 | struct efx_mtd *efx_mtd = mtd->priv; |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 317 | const struct efx_spi_device *spi = efx_mtd->spi; |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 318 | struct efx_nic *efx = efx_mtd->efx; |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 319 | int rc; |
| 320 | |
| 321 | rc = mutex_lock_interruptible(&efx->spi_lock); |
| 322 | if (rc) |
| 323 | return rc; |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 324 | rc = falcon_spi_read(efx, spi, part->offset + start, len, |
| 325 | retlen, buffer); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 326 | mutex_unlock(&efx->spi_lock); |
| 327 | return rc; |
| 328 | } |
| 329 | |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 330 | static int falcon_mtd_erase(struct mtd_info *mtd, loff_t start, size_t len) |
| 331 | { |
| 332 | struct efx_mtd_partition *part = to_efx_mtd_partition(mtd); |
| 333 | struct efx_mtd *efx_mtd = mtd->priv; |
| 334 | struct efx_nic *efx = efx_mtd->efx; |
| 335 | int rc; |
| 336 | |
| 337 | rc = mutex_lock_interruptible(&efx->spi_lock); |
| 338 | if (rc) |
| 339 | return rc; |
| 340 | rc = efx_spi_erase(efx_mtd, part->offset + start, len); |
| 341 | mutex_unlock(&efx->spi_lock); |
| 342 | return rc; |
| 343 | } |
| 344 | |
| 345 | static int falcon_mtd_write(struct mtd_info *mtd, loff_t start, |
| 346 | size_t len, size_t *retlen, const u8 *buffer) |
| 347 | { |
| 348 | struct efx_mtd_partition *part = to_efx_mtd_partition(mtd); |
| 349 | struct efx_mtd *efx_mtd = mtd->priv; |
| 350 | const struct efx_spi_device *spi = efx_mtd->spi; |
| 351 | struct efx_nic *efx = efx_mtd->efx; |
| 352 | int rc; |
| 353 | |
| 354 | rc = mutex_lock_interruptible(&efx->spi_lock); |
| 355 | if (rc) |
| 356 | return rc; |
| 357 | rc = falcon_spi_write(efx, spi, part->offset + start, len, |
| 358 | retlen, buffer); |
| 359 | mutex_unlock(&efx->spi_lock); |
| 360 | return rc; |
| 361 | } |
| 362 | |
| 363 | static int falcon_mtd_sync(struct mtd_info *mtd) |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 364 | { |
| 365 | struct efx_mtd *efx_mtd = mtd->priv; |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 366 | struct efx_nic *efx = efx_mtd->efx; |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 367 | int rc; |
| 368 | |
| 369 | mutex_lock(&efx->spi_lock); |
| 370 | rc = efx_spi_slow_wait(efx_mtd, true); |
| 371 | mutex_unlock(&efx->spi_lock); |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 372 | return rc; |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 373 | } |
| 374 | |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 375 | static struct efx_mtd_ops falcon_mtd_ops = { |
| 376 | .read = falcon_mtd_read, |
| 377 | .erase = falcon_mtd_erase, |
| 378 | .write = falcon_mtd_write, |
| 379 | .sync = falcon_mtd_sync, |
| 380 | }; |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 381 | |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 382 | static int falcon_mtd_probe(struct efx_nic *efx) |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 383 | { |
| 384 | struct efx_spi_device *spi = efx->spi_flash; |
| 385 | struct efx_mtd *efx_mtd; |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 386 | int rc; |
| 387 | |
| 388 | ASSERT_RTNL(); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 389 | |
| 390 | if (!spi || spi->size <= FALCON_FLASH_BOOTCODE_START) |
| 391 | return -ENODEV; |
| 392 | |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 393 | efx_mtd = kzalloc(sizeof(*efx_mtd) + sizeof(efx_mtd->part[0]), |
| 394 | GFP_KERNEL); |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 395 | if (!efx_mtd) |
| 396 | return -ENOMEM; |
| 397 | |
| 398 | efx_mtd->spi = spi; |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 399 | efx_mtd->name = "flash"; |
| 400 | efx_mtd->ops = &falcon_mtd_ops; |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 401 | |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 402 | efx_mtd->n_parts = 1; |
| 403 | efx_mtd->part[0].mtd.type = MTD_NORFLASH; |
| 404 | efx_mtd->part[0].mtd.flags = MTD_CAP_NORFLASH; |
| 405 | efx_mtd->part[0].mtd.size = spi->size - FALCON_FLASH_BOOTCODE_START; |
| 406 | efx_mtd->part[0].mtd.erasesize = spi->erase_size; |
| 407 | efx_mtd->part[0].offset = FALCON_FLASH_BOOTCODE_START; |
| 408 | efx_mtd->part[0].type_name = "sfc_flash_bootrom"; |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 409 | |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 410 | rc = efx_mtd_probe_device(efx, efx_mtd); |
| 411 | if (rc) |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 412 | kfree(efx_mtd); |
Ben Hutchings | 7688483 | 2009-11-29 15:10:44 +0000 | [diff] [blame] | 413 | return rc; |
Ben Hutchings | f415072 | 2008-11-04 20:34:28 +0000 | [diff] [blame] | 414 | } |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 415 | |
| 416 | /* Implementation of MTD operations for Siena */ |
| 417 | |
| 418 | static int siena_mtd_read(struct mtd_info *mtd, loff_t start, |
| 419 | size_t len, size_t *retlen, u8 *buffer) |
| 420 | { |
| 421 | struct efx_mtd_partition *part = to_efx_mtd_partition(mtd); |
| 422 | struct efx_mtd *efx_mtd = mtd->priv; |
| 423 | struct efx_nic *efx = efx_mtd->efx; |
| 424 | loff_t offset = start; |
| 425 | loff_t end = min_t(loff_t, start + len, mtd->size); |
| 426 | size_t chunk; |
| 427 | int rc = 0; |
| 428 | |
| 429 | while (offset < end) { |
Ben Hutchings | 5a27e86 | 2010-01-25 15:49:59 -0800 | [diff] [blame^] | 430 | chunk = min_t(size_t, end - offset, EFX_MCDI_NVRAM_LEN_MAX); |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 431 | rc = efx_mcdi_nvram_read(efx, part->mcdi.nvram_type, offset, |
| 432 | buffer, chunk); |
| 433 | if (rc) |
| 434 | goto out; |
| 435 | offset += chunk; |
| 436 | buffer += chunk; |
| 437 | } |
| 438 | out: |
| 439 | *retlen = offset - start; |
| 440 | return rc; |
| 441 | } |
| 442 | |
| 443 | static int siena_mtd_erase(struct mtd_info *mtd, loff_t start, size_t len) |
| 444 | { |
| 445 | struct efx_mtd_partition *part = to_efx_mtd_partition(mtd); |
| 446 | struct efx_mtd *efx_mtd = mtd->priv; |
| 447 | struct efx_nic *efx = efx_mtd->efx; |
| 448 | loff_t offset = start & ~((loff_t)(mtd->erasesize - 1)); |
| 449 | loff_t end = min_t(loff_t, start + len, mtd->size); |
| 450 | size_t chunk = part->mtd.erasesize; |
| 451 | int rc = 0; |
| 452 | |
| 453 | if (!part->mcdi.updating) { |
| 454 | rc = efx_mcdi_nvram_update_start(efx, part->mcdi.nvram_type); |
| 455 | if (rc) |
| 456 | goto out; |
| 457 | part->mcdi.updating = 1; |
| 458 | } |
| 459 | |
| 460 | /* The MCDI interface can in fact do multiple erase blocks at once; |
| 461 | * but erasing may be slow, so we make multiple calls here to avoid |
| 462 | * tripping the MCDI RPC timeout. */ |
| 463 | while (offset < end) { |
| 464 | rc = efx_mcdi_nvram_erase(efx, part->mcdi.nvram_type, offset, |
| 465 | chunk); |
| 466 | if (rc) |
| 467 | goto out; |
| 468 | offset += chunk; |
| 469 | } |
| 470 | out: |
| 471 | return rc; |
| 472 | } |
| 473 | |
| 474 | static int siena_mtd_write(struct mtd_info *mtd, loff_t start, |
| 475 | size_t len, size_t *retlen, const u8 *buffer) |
| 476 | { |
| 477 | struct efx_mtd_partition *part = to_efx_mtd_partition(mtd); |
| 478 | struct efx_mtd *efx_mtd = mtd->priv; |
| 479 | struct efx_nic *efx = efx_mtd->efx; |
| 480 | loff_t offset = start; |
| 481 | loff_t end = min_t(loff_t, start + len, mtd->size); |
| 482 | size_t chunk; |
| 483 | int rc = 0; |
| 484 | |
| 485 | if (!part->mcdi.updating) { |
| 486 | rc = efx_mcdi_nvram_update_start(efx, part->mcdi.nvram_type); |
| 487 | if (rc) |
| 488 | goto out; |
| 489 | part->mcdi.updating = 1; |
| 490 | } |
| 491 | |
| 492 | while (offset < end) { |
Ben Hutchings | 5a27e86 | 2010-01-25 15:49:59 -0800 | [diff] [blame^] | 493 | chunk = min_t(size_t, end - offset, EFX_MCDI_NVRAM_LEN_MAX); |
Ben Hutchings | 8880f4e | 2009-11-29 15:15:41 +0000 | [diff] [blame] | 494 | rc = efx_mcdi_nvram_write(efx, part->mcdi.nvram_type, offset, |
| 495 | buffer, chunk); |
| 496 | if (rc) |
| 497 | goto out; |
| 498 | offset += chunk; |
| 499 | buffer += chunk; |
| 500 | } |
| 501 | out: |
| 502 | *retlen = offset - start; |
| 503 | return rc; |
| 504 | } |
| 505 | |
| 506 | static int siena_mtd_sync(struct mtd_info *mtd) |
| 507 | { |
| 508 | struct efx_mtd_partition *part = to_efx_mtd_partition(mtd); |
| 509 | struct efx_mtd *efx_mtd = mtd->priv; |
| 510 | struct efx_nic *efx = efx_mtd->efx; |
| 511 | int rc = 0; |
| 512 | |
| 513 | if (part->mcdi.updating) { |
| 514 | part->mcdi.updating = 0; |
| 515 | rc = efx_mcdi_nvram_update_finish(efx, part->mcdi.nvram_type); |
| 516 | } |
| 517 | |
| 518 | return rc; |
| 519 | } |
| 520 | |
| 521 | static struct efx_mtd_ops siena_mtd_ops = { |
| 522 | .read = siena_mtd_read, |
| 523 | .erase = siena_mtd_erase, |
| 524 | .write = siena_mtd_write, |
| 525 | .sync = siena_mtd_sync, |
| 526 | }; |
| 527 | |
| 528 | struct siena_nvram_type_info { |
| 529 | int port; |
| 530 | const char *name; |
| 531 | }; |
| 532 | |
| 533 | static struct siena_nvram_type_info siena_nvram_types[] = { |
| 534 | [MC_CMD_NVRAM_TYPE_DISABLED_CALLISTO] = { 0, "sfc_dummy_phy" }, |
| 535 | [MC_CMD_NVRAM_TYPE_MC_FW] = { 0, "sfc_mcfw" }, |
| 536 | [MC_CMD_NVRAM_TYPE_MC_FW_BACKUP] = { 0, "sfc_mcfw_backup" }, |
| 537 | [MC_CMD_NVRAM_TYPE_STATIC_CFG_PORT0] = { 0, "sfc_static_cfg" }, |
| 538 | [MC_CMD_NVRAM_TYPE_STATIC_CFG_PORT1] = { 1, "sfc_static_cfg" }, |
| 539 | [MC_CMD_NVRAM_TYPE_DYNAMIC_CFG_PORT0] = { 0, "sfc_dynamic_cfg" }, |
| 540 | [MC_CMD_NVRAM_TYPE_DYNAMIC_CFG_PORT1] = { 1, "sfc_dynamic_cfg" }, |
| 541 | [MC_CMD_NVRAM_TYPE_EXP_ROM] = { 0, "sfc_exp_rom" }, |
| 542 | [MC_CMD_NVRAM_TYPE_EXP_ROM_CFG_PORT0] = { 0, "sfc_exp_rom_cfg" }, |
| 543 | [MC_CMD_NVRAM_TYPE_EXP_ROM_CFG_PORT1] = { 1, "sfc_exp_rom_cfg" }, |
| 544 | [MC_CMD_NVRAM_TYPE_PHY_PORT0] = { 0, "sfc_phy_fw" }, |
| 545 | [MC_CMD_NVRAM_TYPE_PHY_PORT1] = { 1, "sfc_phy_fw" }, |
| 546 | }; |
| 547 | |
| 548 | static int siena_mtd_probe_partition(struct efx_nic *efx, |
| 549 | struct efx_mtd *efx_mtd, |
| 550 | unsigned int part_id, |
| 551 | unsigned int type) |
| 552 | { |
| 553 | struct efx_mtd_partition *part = &efx_mtd->part[part_id]; |
| 554 | struct siena_nvram_type_info *info; |
| 555 | size_t size, erase_size; |
| 556 | bool protected; |
| 557 | int rc; |
| 558 | |
| 559 | if (type >= ARRAY_SIZE(siena_nvram_types)) |
| 560 | return -ENODEV; |
| 561 | |
| 562 | info = &siena_nvram_types[type]; |
| 563 | |
| 564 | if (info->port != efx_port_num(efx)) |
| 565 | return -ENODEV; |
| 566 | |
| 567 | rc = efx_mcdi_nvram_info(efx, type, &size, &erase_size, &protected); |
| 568 | if (rc) |
| 569 | return rc; |
| 570 | if (protected) |
| 571 | return -ENODEV; /* hide it */ |
| 572 | |
| 573 | part->mcdi.nvram_type = type; |
| 574 | part->type_name = info->name; |
| 575 | |
| 576 | part->mtd.type = MTD_NORFLASH; |
| 577 | part->mtd.flags = MTD_CAP_NORFLASH; |
| 578 | part->mtd.size = size; |
| 579 | part->mtd.erasesize = erase_size; |
| 580 | |
| 581 | return 0; |
| 582 | } |
| 583 | |
| 584 | static int siena_mtd_get_fw_subtypes(struct efx_nic *efx, |
| 585 | struct efx_mtd *efx_mtd) |
| 586 | { |
| 587 | struct efx_mtd_partition *part; |
| 588 | uint16_t fw_subtype_list[MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_LEN / |
| 589 | sizeof(uint16_t)]; |
| 590 | int rc; |
| 591 | |
| 592 | rc = efx_mcdi_get_board_cfg(efx, NULL, fw_subtype_list); |
| 593 | if (rc) |
| 594 | return rc; |
| 595 | |
| 596 | efx_for_each_partition(part, efx_mtd) |
| 597 | part->mcdi.fw_subtype = fw_subtype_list[part->mcdi.nvram_type]; |
| 598 | |
| 599 | return 0; |
| 600 | } |
| 601 | |
| 602 | static int siena_mtd_probe(struct efx_nic *efx) |
| 603 | { |
| 604 | struct efx_mtd *efx_mtd; |
| 605 | int rc = -ENODEV; |
| 606 | u32 nvram_types; |
| 607 | unsigned int type; |
| 608 | |
| 609 | ASSERT_RTNL(); |
| 610 | |
| 611 | rc = efx_mcdi_nvram_types(efx, &nvram_types); |
| 612 | if (rc) |
| 613 | return rc; |
| 614 | |
| 615 | efx_mtd = kzalloc(sizeof(*efx_mtd) + |
| 616 | hweight32(nvram_types) * sizeof(efx_mtd->part[0]), |
| 617 | GFP_KERNEL); |
| 618 | if (!efx_mtd) |
| 619 | return -ENOMEM; |
| 620 | |
| 621 | efx_mtd->name = "Siena NVRAM manager"; |
| 622 | |
| 623 | efx_mtd->ops = &siena_mtd_ops; |
| 624 | |
| 625 | type = 0; |
| 626 | efx_mtd->n_parts = 0; |
| 627 | |
| 628 | while (nvram_types != 0) { |
| 629 | if (nvram_types & 1) { |
| 630 | rc = siena_mtd_probe_partition(efx, efx_mtd, |
| 631 | efx_mtd->n_parts, type); |
| 632 | if (rc == 0) |
| 633 | efx_mtd->n_parts++; |
| 634 | else if (rc != -ENODEV) |
| 635 | goto fail; |
| 636 | } |
| 637 | type++; |
| 638 | nvram_types >>= 1; |
| 639 | } |
| 640 | |
| 641 | rc = siena_mtd_get_fw_subtypes(efx, efx_mtd); |
| 642 | if (rc) |
| 643 | goto fail; |
| 644 | |
| 645 | rc = efx_mtd_probe_device(efx, efx_mtd); |
| 646 | fail: |
| 647 | if (rc) |
| 648 | kfree(efx_mtd); |
| 649 | return rc; |
| 650 | } |
| 651 | |