1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 2023 Advanced Micro Devices, Inc */ 3 4 #include <linux/errno.h> 5 #include <linux/pci.h> 6 #include <linux/utsname.h> 7 8 #include "core.h" 9 10 int pdsc_err_to_errno(enum pds_core_status_code code) 11 { 12 switch (code) { 13 case PDS_RC_SUCCESS: 14 return 0; 15 case PDS_RC_EVERSION: 16 case PDS_RC_EQTYPE: 17 case PDS_RC_EQID: 18 case PDS_RC_EINVAL: 19 case PDS_RC_ENOSUPP: 20 return -EINVAL; 21 case PDS_RC_EPERM: 22 return -EPERM; 23 case PDS_RC_ENOENT: 24 return -ENOENT; 25 case PDS_RC_EAGAIN: 26 return -EAGAIN; 27 case PDS_RC_ENOMEM: 28 return -ENOMEM; 29 case PDS_RC_EFAULT: 30 return -EFAULT; 31 case PDS_RC_EBUSY: 32 return -EBUSY; 33 case PDS_RC_EEXIST: 34 return -EEXIST; 35 case PDS_RC_EVFID: 36 return -ENODEV; 37 case PDS_RC_ECLIENT: 38 return -ECHILD; 39 case PDS_RC_ENOSPC: 40 return -ENOSPC; 41 case PDS_RC_ERANGE: 42 return -ERANGE; 43 case PDS_RC_BAD_ADDR: 44 return -EFAULT; 45 case PDS_RC_BAD_PCI: 46 return -ENXIO; 47 case PDS_RC_EOPCODE: 48 case PDS_RC_EINTR: 49 case PDS_RC_DEV_CMD: 50 case PDS_RC_ERROR: 51 case PDS_RC_ERDMA: 52 case PDS_RC_EIO: 53 default: 54 return -EIO; 55 } 56 } 57 58 bool pdsc_is_fw_running(struct pdsc *pdsc) 59 { 60 if (!pdsc->info_regs) 61 return false; 62 63 pdsc->fw_status = ioread8(&pdsc->info_regs->fw_status); 64 pdsc->last_fw_time = jiffies; 65 pdsc->last_hb = ioread32(&pdsc->info_regs->fw_heartbeat); 66 67 /* Firmware is useful only if the running bit is set and 68 * fw_status != 0xff (bad PCI read) 69 */ 70 return (pdsc->fw_status != PDS_RC_BAD_PCI) && 71 (pdsc->fw_status & PDS_CORE_FW_STS_F_RUNNING); 72 } 73 74 bool pdsc_is_fw_good(struct pdsc *pdsc) 75 { 76 bool fw_running = pdsc_is_fw_running(pdsc); 77 u8 gen; 78 79 /* Make sure to update the cached fw_status by calling 80 * pdsc_is_fw_running() before getting the generation 81 */ 82 gen = pdsc->fw_status & PDS_CORE_FW_STS_F_GENERATION; 83 84 return fw_running && gen == pdsc->fw_generation; 85 } 86 87 static u8 pdsc_devcmd_status(struct pdsc *pdsc) 88 { 89 return ioread8(&pdsc->cmd_regs->comp.status); 90 } 91 92 static bool pdsc_devcmd_done(struct pdsc *pdsc) 93 { 94 return ioread32(&pdsc->cmd_regs->done) & PDS_CORE_DEV_CMD_DONE; 95 } 96 97 static void pdsc_devcmd_dbell(struct pdsc *pdsc) 98 { 99 iowrite32(0, &pdsc->cmd_regs->done); 100 iowrite32(1, &pdsc->cmd_regs->doorbell); 101 } 102 103 static void pdsc_devcmd_clean(struct pdsc *pdsc) 104 { 105 iowrite32(0, &pdsc->cmd_regs->doorbell); 106 memset_io(&pdsc->cmd_regs->cmd, 0, sizeof(pdsc->cmd_regs->cmd)); 107 } 108 109 static const char *pdsc_devcmd_str(int opcode) 110 { 111 switch (opcode) { 112 case PDS_CORE_CMD_NOP: 113 return "PDS_CORE_CMD_NOP"; 114 case PDS_CORE_CMD_IDENTIFY: 115 return "PDS_CORE_CMD_IDENTIFY"; 116 case PDS_CORE_CMD_RESET: 117 return "PDS_CORE_CMD_RESET"; 118 case PDS_CORE_CMD_INIT: 119 return "PDS_CORE_CMD_INIT"; 120 case PDS_CORE_CMD_FW_DOWNLOAD: 121 return "PDS_CORE_CMD_FW_DOWNLOAD"; 122 case PDS_CORE_CMD_FW_CONTROL: 123 return "PDS_CORE_CMD_FW_CONTROL"; 124 default: 125 return "PDS_CORE_CMD_UNKNOWN"; 126 } 127 } 128 129 static int pdsc_devcmd_wait(struct pdsc *pdsc, u8 opcode, int max_seconds) 130 { 131 struct device *dev = pdsc->dev; 132 unsigned long start_time; 133 unsigned long max_wait; 134 unsigned long duration; 135 int timeout = 0; 136 bool running; 137 int done = 0; 138 int err = 0; 139 int status; 140 141 start_time = jiffies; 142 max_wait = start_time + (max_seconds * HZ); 143 144 while (!done && !timeout) { 145 running = pdsc_is_fw_running(pdsc); 146 if (!running) 147 break; 148 149 done = pdsc_devcmd_done(pdsc); 150 if (done) 151 break; 152 153 timeout = time_after(jiffies, max_wait); 154 if (timeout) 155 break; 156 157 usleep_range(100, 200); 158 } 159 duration = jiffies - start_time; 160 161 if (done && duration > HZ) 162 dev_dbg(dev, "DEVCMD %d %s after %ld secs\n", 163 opcode, pdsc_devcmd_str(opcode), duration / HZ); 164 165 if ((!done || timeout) && running) { 166 dev_err(dev, "DEVCMD %d %s timeout, done %d timeout %d max_seconds=%d\n", 167 opcode, pdsc_devcmd_str(opcode), done, timeout, 168 max_seconds); 169 err = -ETIMEDOUT; 170 pdsc_devcmd_clean(pdsc); 171 } 172 173 status = pdsc_devcmd_status(pdsc); 174 err = pdsc_err_to_errno(status); 175 if (err && err != -EAGAIN) 176 dev_err(dev, "DEVCMD %d %s failed, status=%d err %d %pe\n", 177 opcode, pdsc_devcmd_str(opcode), status, err, 178 ERR_PTR(err)); 179 180 return err; 181 } 182 183 int pdsc_devcmd_locked(struct pdsc *pdsc, union pds_core_dev_cmd *cmd, 184 union pds_core_dev_comp *comp, int max_seconds) 185 { 186 int err; 187 188 if (!pdsc->cmd_regs) 189 return -ENXIO; 190 191 memcpy_toio(&pdsc->cmd_regs->cmd, cmd, sizeof(*cmd)); 192 pdsc_devcmd_dbell(pdsc); 193 err = pdsc_devcmd_wait(pdsc, cmd->opcode, max_seconds); 194 195 if ((err == -ENXIO || err == -ETIMEDOUT) && pdsc->wq) 196 queue_work(pdsc->wq, &pdsc->health_work); 197 else 198 memcpy_fromio(comp, &pdsc->cmd_regs->comp, sizeof(*comp)); 199 200 return err; 201 } 202 203 int pdsc_devcmd(struct pdsc *pdsc, union pds_core_dev_cmd *cmd, 204 union pds_core_dev_comp *comp, int max_seconds) 205 { 206 int err; 207 208 mutex_lock(&pdsc->devcmd_lock); 209 err = pdsc_devcmd_locked(pdsc, cmd, comp, max_seconds); 210 mutex_unlock(&pdsc->devcmd_lock); 211 212 return err; 213 } 214 215 int pdsc_devcmd_init(struct pdsc *pdsc) 216 { 217 union pds_core_dev_comp comp = {}; 218 union pds_core_dev_cmd cmd = { 219 .opcode = PDS_CORE_CMD_INIT, 220 }; 221 222 return pdsc_devcmd(pdsc, &cmd, &comp, pdsc->devcmd_timeout); 223 } 224 225 int pdsc_devcmd_reset(struct pdsc *pdsc) 226 { 227 union pds_core_dev_comp comp = {}; 228 union pds_core_dev_cmd cmd = { 229 .reset.opcode = PDS_CORE_CMD_RESET, 230 }; 231 232 return pdsc_devcmd(pdsc, &cmd, &comp, pdsc->devcmd_timeout); 233 } 234 235 static int pdsc_devcmd_identify_locked(struct pdsc *pdsc) 236 { 237 union pds_core_dev_comp comp = {}; 238 union pds_core_dev_cmd cmd = { 239 .identify.opcode = PDS_CORE_CMD_IDENTIFY, 240 .identify.ver = PDS_CORE_IDENTITY_VERSION_1, 241 }; 242 243 return pdsc_devcmd_locked(pdsc, &cmd, &comp, pdsc->devcmd_timeout); 244 } 245 246 static void pdsc_init_devinfo(struct pdsc *pdsc) 247 { 248 pdsc->dev_info.asic_type = ioread8(&pdsc->info_regs->asic_type); 249 pdsc->dev_info.asic_rev = ioread8(&pdsc->info_regs->asic_rev); 250 pdsc->fw_generation = PDS_CORE_FW_STS_F_GENERATION & 251 ioread8(&pdsc->info_regs->fw_status); 252 253 memcpy_fromio(pdsc->dev_info.fw_version, 254 pdsc->info_regs->fw_version, 255 PDS_CORE_DEVINFO_FWVERS_BUFLEN); 256 pdsc->dev_info.fw_version[PDS_CORE_DEVINFO_FWVERS_BUFLEN] = 0; 257 258 memcpy_fromio(pdsc->dev_info.serial_num, 259 pdsc->info_regs->serial_num, 260 PDS_CORE_DEVINFO_SERIAL_BUFLEN); 261 pdsc->dev_info.serial_num[PDS_CORE_DEVINFO_SERIAL_BUFLEN] = 0; 262 263 dev_dbg(pdsc->dev, "fw_version %s\n", pdsc->dev_info.fw_version); 264 } 265 266 static int pdsc_identify(struct pdsc *pdsc) 267 { 268 struct pds_core_drv_identity drv = {}; 269 size_t sz; 270 int err; 271 int n; 272 273 drv.drv_type = cpu_to_le32(PDS_DRIVER_LINUX); 274 /* Catching the return quiets a Wformat-truncation complaint */ 275 n = snprintf(drv.driver_ver_str, sizeof(drv.driver_ver_str), 276 "%s %s", PDS_CORE_DRV_NAME, utsname()->release); 277 if (n > sizeof(drv.driver_ver_str)) 278 dev_dbg(pdsc->dev, "release name truncated, don't care\n"); 279 280 /* Next let's get some info about the device 281 * We use the devcmd_lock at this level in order to 282 * get safe access to the cmd_regs->data before anyone 283 * else can mess it up 284 */ 285 mutex_lock(&pdsc->devcmd_lock); 286 287 sz = min_t(size_t, sizeof(drv), sizeof(pdsc->cmd_regs->data)); 288 memcpy_toio(&pdsc->cmd_regs->data, &drv, sz); 289 290 err = pdsc_devcmd_identify_locked(pdsc); 291 if (!err) { 292 sz = min_t(size_t, sizeof(pdsc->dev_ident), 293 sizeof(pdsc->cmd_regs->data)); 294 memcpy_fromio(&pdsc->dev_ident, &pdsc->cmd_regs->data, sz); 295 } 296 mutex_unlock(&pdsc->devcmd_lock); 297 298 if (err) { 299 dev_err(pdsc->dev, "Cannot identify device: %pe\n", 300 ERR_PTR(err)); 301 return err; 302 } 303 304 if (isprint(pdsc->dev_info.fw_version[0]) && 305 isascii(pdsc->dev_info.fw_version[0])) 306 dev_info(pdsc->dev, "FW: %.*s\n", 307 (int)(sizeof(pdsc->dev_info.fw_version) - 1), 308 pdsc->dev_info.fw_version); 309 else 310 dev_info(pdsc->dev, "FW: (invalid string) 0x%02x 0x%02x 0x%02x 0x%02x ...\n", 311 (u8)pdsc->dev_info.fw_version[0], 312 (u8)pdsc->dev_info.fw_version[1], 313 (u8)pdsc->dev_info.fw_version[2], 314 (u8)pdsc->dev_info.fw_version[3]); 315 316 return 0; 317 } 318 319 int pdsc_dev_init(struct pdsc *pdsc) 320 { 321 unsigned int nintrs; 322 int err; 323 324 /* Initial init and reset of device */ 325 pdsc_init_devinfo(pdsc); 326 pdsc->devcmd_timeout = PDS_CORE_DEVCMD_TIMEOUT; 327 328 err = pdsc_devcmd_reset(pdsc); 329 if (err) 330 return err; 331 332 err = pdsc_identify(pdsc); 333 if (err) 334 return err; 335 336 pdsc_debugfs_add_ident(pdsc); 337 338 /* Now we can reserve interrupts */ 339 nintrs = le32_to_cpu(pdsc->dev_ident.nintrs); 340 nintrs = min_t(unsigned int, num_online_cpus(), nintrs); 341 342 /* Get intr_info struct array for tracking */ 343 pdsc->intr_info = kcalloc(nintrs, sizeof(*pdsc->intr_info), GFP_KERNEL); 344 if (!pdsc->intr_info) { 345 err = -ENOMEM; 346 goto err_out; 347 } 348 349 err = pci_alloc_irq_vectors(pdsc->pdev, nintrs, nintrs, PCI_IRQ_MSIX); 350 if (err != nintrs) { 351 dev_err(pdsc->dev, "Can't get %d intrs from OS: %pe\n", 352 nintrs, ERR_PTR(err)); 353 err = -ENOSPC; 354 goto err_out; 355 } 356 pdsc->nintrs = nintrs; 357 358 return 0; 359 360 err_out: 361 kfree(pdsc->intr_info); 362 pdsc->intr_info = NULL; 363 364 return err; 365 } 366