drivers/net/wwan/iosm/iosm_ipc_devlink.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2020-2021 Intel Corporation.
   4  */
   5
   6 #include "iosm_ipc_chnl_cfg.h"
   7 #include "iosm_ipc_coredump.h"
   8 #include "iosm_ipc_devlink.h"
   9 #include "iosm_ipc_flash.h"
  10
  11 /* Coredump list */
  12 static struct iosm_coredump_file_info list[IOSM_NOF_CD_REGION] = {
  13         {"report.json", REPORT_JSON_SIZE,},
  14         {"coredump.fcd", COREDUMP_FCD_SIZE,},
  15         {"cdd.log", CDD_LOG_SIZE,},
  16         {"eeprom.bin", EEPROM_BIN_SIZE,},
  17         {"bootcore_trace.bin", BOOTCORE_TRC_BIN_SIZE,},
  18         {"bootcore_prev_trace.bin", BOOTCORE_PREV_TRC_BIN_SIZE,},
  19 };
  20
  21 /* Get the param values for the specific param ID's */
  22 static int ipc_devlink_get_param(struct devlink *dl, u32 id,
  23                                  struct devlink_param_gset_ctx *ctx)
  24 {
  25         struct iosm_devlink *ipc_devlink = devlink_priv(dl);
  26
  27         if (id == IOSM_DEVLINK_PARAM_ID_ERASE_FULL_FLASH)
  28                 ctx->val.vu8 = ipc_devlink->param.erase_full_flash;
  29
  30         return 0;
  31 }
  32
  33 /* Set the param values for the specific param ID's */
  34 static int ipc_devlink_set_param(struct devlink *dl, u32 id,
  35                                  struct devlink_param_gset_ctx *ctx)
  36 {
  37         struct iosm_devlink *ipc_devlink = devlink_priv(dl);
  38
  39         if (id == IOSM_DEVLINK_PARAM_ID_ERASE_FULL_FLASH)
  40                 ipc_devlink->param.erase_full_flash = ctx->val.vu8;
  41
  42         return 0;
  43 }
  44
  45 /* Devlink param structure array */
  46 static const struct devlink_param iosm_devlink_params[] = {
  47         DEVLINK_PARAM_DRIVER(IOSM_DEVLINK_PARAM_ID_ERASE_FULL_FLASH,
  48                              "erase_full_flash", DEVLINK_PARAM_TYPE_BOOL,
  49                              BIT(DEVLINK_PARAM_CMODE_RUNTIME),
  50                              ipc_devlink_get_param, ipc_devlink_set_param,
  51                              NULL),
  52 };
  53
  54 /* Get devlink flash component type */
  55 static enum iosm_flash_comp_type
  56 ipc_devlink_get_flash_comp_type(const char comp_str[], u32 len)
  57 {
  58         enum iosm_flash_comp_type fls_type;
  59
  60         if (!strncmp("PSI", comp_str, len))
  61                 fls_type = FLASH_COMP_TYPE_PSI;
  62         else if (!strncmp("EBL", comp_str, len))
  63                 fls_type = FLASH_COMP_TYPE_EBL;
  64         else if (!strncmp("FLS", comp_str, len))
  65                 fls_type = FLASH_COMP_TYPE_FLS;
  66         else
  67                 fls_type = FLASH_COMP_TYPE_INVAL;
  68
  69         return fls_type;
  70 }
  71
  72 /* Function triggered on devlink flash command
  73  * Flash update function which calls multiple functions based on
  74  * component type specified in the flash command
  75  */
  76 static int ipc_devlink_flash_update(struct devlink *devlink,
  77                                     struct devlink_flash_update_params *params,
  78                                     struct netlink_ext_ack *extack)
  79 {
  80         struct iosm_devlink *ipc_devlink = devlink_priv(devlink);
  81         enum iosm_flash_comp_type fls_type;
  82         struct iosm_devlink_image *header;
  83         int rc = -EINVAL;
  84         u8 *mdm_rsp;
  85
  86         header = (struct iosm_devlink_image *)params->fw->data;
  87
  88         if (!header || params->fw->size <= IOSM_DEVLINK_HDR_SIZE ||
  89             (memcmp(header->magic_header, IOSM_DEVLINK_MAGIC_HEADER,
  90              IOSM_DEVLINK_MAGIC_HEADER_LEN) != 0))
  91                 return -EINVAL;
  92
  93         mdm_rsp = kzalloc(IOSM_EBL_DW_PACK_SIZE, GFP_KERNEL);
  94         if (!mdm_rsp)
  95                 return -ENOMEM;
  96
  97         fls_type = ipc_devlink_get_flash_comp_type(header->image_type,
  98                                                    IOSM_DEVLINK_MAX_IMG_LEN);
  99
 100         switch (fls_type) {
 101         case FLASH_COMP_TYPE_PSI:
 102                 rc = ipc_flash_boot_psi(ipc_devlink, params->fw);
 103                 break;
 104         case FLASH_COMP_TYPE_EBL:
 105                 rc = ipc_flash_boot_ebl(ipc_devlink, params->fw);
 106                 if (rc)
 107                         break;
 108                 rc = ipc_flash_boot_set_capabilities(ipc_devlink, mdm_rsp);
 109                 if (rc)
 110                         break;
 111                 rc = ipc_flash_read_swid(ipc_devlink, mdm_rsp);
 112                 break;
 113         case FLASH_COMP_TYPE_FLS:
 114                 rc = ipc_flash_send_fls(ipc_devlink, params->fw, mdm_rsp);
 115                 break;
 116         default:
 117                 devlink_flash_update_status_notify(devlink, "Invalid component",
 118                                                    NULL, 0, 0);
 119                 break;
 120         }
 121
 122         if (!rc)
 123                 devlink_flash_update_status_notify(devlink, "Flashing success",
 124                                                    header->image_type, 0, 0);
 125         else
 126                 devlink_flash_update_status_notify(devlink, "Flashing failed",
 127                                                    header->image_type, 0, 0);
 128
 129         kfree(mdm_rsp);
 130         return rc;
 131 }
 132
 133 /* Call back function for devlink ops */
 134 static const struct devlink_ops devlink_flash_ops = {
 135         .flash_update = ipc_devlink_flash_update,
 136 };
 137
 138 /**
 139  * ipc_devlink_send_cmd - Send command to Modem
 140  * @ipc_devlink: Pointer to struct iosm_devlink
 141  * @cmd:         Command to be sent to modem
 142  * @entry:       Command entry number
 143  *
 144  * Returns:      0 on success and failure value on error
 145  */
 146 int ipc_devlink_send_cmd(struct iosm_devlink *ipc_devlink, u16 cmd, u32 entry)
 147 {
 148         struct iosm_rpsi_cmd rpsi_cmd;
 149
 150         rpsi_cmd.param.dword = cpu_to_le32(entry);
 151         rpsi_cmd.cmd = cpu_to_le16(cmd);
 152         rpsi_cmd.crc = rpsi_cmd.param.word[0] ^ rpsi_cmd.param.word[1] ^
 153                        rpsi_cmd.cmd;
 154
 155         return ipc_imem_sys_devlink_write(ipc_devlink, (u8 *)&rpsi_cmd,
 156                                           sizeof(rpsi_cmd));
 157 }
 158
 159 /* Function to create snapshot */
 160 static int ipc_devlink_coredump_snapshot(struct devlink *dl,
 161                                          const struct devlink_region_ops *ops,
 162                                          struct netlink_ext_ack *extack,
 163                                          u8 **data)
 164 {
 165         struct iosm_devlink *ipc_devlink = devlink_priv(dl);
 166         struct iosm_coredump_file_info *cd_list = ops->priv;
 167         u32 region_size;
 168         int rc;
 169
 170         dev_dbg(ipc_devlink->dev, "Region:%s, ID:%d", ops->name,
 171                 cd_list->entry);
 172         region_size = cd_list->default_size;
 173         rc = ipc_coredump_collect(ipc_devlink, data, cd_list->entry,
 174                                   region_size);
 175         if (rc) {
 176                 dev_err(ipc_devlink->dev, "Fail to create snapshot,err %d", rc);
 177                 goto coredump_collect_err;
 178         }
 179
 180         /* Send coredump end cmd indicating end of coredump collection */
 181         if (cd_list->entry == (IOSM_NOF_CD_REGION - 1))
 182                 ipc_coredump_get_list(ipc_devlink, rpsi_cmd_coredump_end);
 183
 184         return 0;
 185
 186 coredump_collect_err:
 187         ipc_coredump_get_list(ipc_devlink, rpsi_cmd_coredump_end);
 188         return rc;
 189 }
 190
 191 /* To create regions for coredump files */
 192 static int ipc_devlink_create_region(struct iosm_devlink *devlink)
 193 {
 194         struct devlink_region_ops *mdm_coredump;
 195         int rc = 0;
 196         int i;
 197
 198         mdm_coredump = devlink->iosm_devlink_mdm_coredump;
 199         for (i = 0; i < IOSM_NOF_CD_REGION; i++) {
 200                 mdm_coredump[i].name = list[i].filename;
 201                 mdm_coredump[i].snapshot = ipc_devlink_coredump_snapshot;
 202                 mdm_coredump[i].destructor = vfree;
 203                 devlink->cd_regions[i] =
 204                         devlink_region_create(devlink->devlink_ctx,
 205                                               &mdm_coredump[i], MAX_SNAPSHOTS,
 206                                               list[i].default_size);
 207
 208                 if (IS_ERR(devlink->cd_regions[i])) {
 209                         rc = PTR_ERR(devlink->cd_regions[i]);
 210                         dev_err(devlink->dev, "Devlink region fail,err %d", rc);
 211                         /* Delete previously created regions */
 212                         for ( ; i >= 0; i--)
 213                                 devlink_region_destroy(devlink->cd_regions[i]);
 214                         goto region_create_fail;
 215                 }
 216                 list[i].entry = i;
 217                 mdm_coredump[i].priv = list + i;
 218         }
 219 region_create_fail:
 220         return rc;
 221 }
 222
 223 /* To Destroy devlink regions */
 224 static void ipc_devlink_destroy_region(struct iosm_devlink *ipc_devlink)
 225 {
 226         u8 i;
 227
 228         for (i = 0; i < IOSM_NOF_CD_REGION; i++)
 229                 devlink_region_destroy(ipc_devlink->cd_regions[i]);
 230 }
 231
 232 /**
 233  * ipc_devlink_init - Initialize/register devlink to IOSM driver
 234  * @ipc_imem:   Pointer to struct iosm_imem
 235  *
 236  * Returns:     Pointer to iosm_devlink on success and NULL on failure
 237  */
 238 struct iosm_devlink *ipc_devlink_init(struct iosm_imem *ipc_imem)
 239 {
 240         struct ipc_chnl_cfg chnl_cfg_flash = { 0 };
 241         struct iosm_devlink *ipc_devlink;
 242         struct devlink *devlink_ctx;
 243         int rc;
 244
 245         devlink_ctx = devlink_alloc(&devlink_flash_ops,
 246                                     sizeof(struct iosm_devlink),
 247                                     ipc_imem->dev);
 248         if (!devlink_ctx) {
 249                 dev_err(ipc_imem->dev, "devlink_alloc failed");
 250                 goto devlink_alloc_fail;
 251         }
 252
 253         ipc_devlink = devlink_priv(devlink_ctx);
 254         ipc_devlink->devlink_ctx = devlink_ctx;
 255         ipc_devlink->pcie = ipc_imem->pcie;
 256         ipc_devlink->dev = ipc_imem->dev;
 257
 258         rc = devlink_params_register(devlink_ctx, iosm_devlink_params,
 259                                      ARRAY_SIZE(iosm_devlink_params));
 260         if (rc) {
 261                 dev_err(ipc_devlink->dev,
 262                         "devlink_params_register failed. rc %d", rc);
 263                 goto param_reg_fail;
 264         }
 265
 266         ipc_devlink->cd_file_info = list;
 267
 268         rc = ipc_devlink_create_region(ipc_devlink);
 269         if (rc) {
 270                 dev_err(ipc_devlink->dev, "Devlink Region create failed, rc %d",
 271                         rc);
 272                 goto region_create_fail;
 273         }
 274
 275         if (ipc_chnl_cfg_get(&chnl_cfg_flash, IPC_MEM_CTRL_CHL_ID_7) < 0)
 276                 goto chnl_get_fail;
 277
 278         ipc_imem_channel_init(ipc_imem, IPC_CTYPE_CTRL,
 279                               chnl_cfg_flash, IRQ_MOD_OFF);
 280
 281         init_completion(&ipc_devlink->devlink_sio.read_sem);
 282         skb_queue_head_init(&ipc_devlink->devlink_sio.rx_list);
 283
 284         devlink_register(devlink_ctx);
 285         dev_dbg(ipc_devlink->dev, "iosm devlink register success");
 286
 287         return ipc_devlink;
 288
 289 chnl_get_fail:
 290         ipc_devlink_destroy_region(ipc_devlink);
 291 region_create_fail:
 292         devlink_params_unregister(devlink_ctx, iosm_devlink_params,
 293                                   ARRAY_SIZE(iosm_devlink_params));
 294 param_reg_fail:
 295         devlink_free(devlink_ctx);
 296 devlink_alloc_fail:
 297         return NULL;
 298 }
 299
 300 /**
 301  * ipc_devlink_deinit - To unintialize the devlink from IOSM driver.
 302  * @ipc_devlink:        Devlink instance
 303  */
 304 void ipc_devlink_deinit(struct iosm_devlink *ipc_devlink)
 305 {
 306         struct devlink *devlink_ctx = ipc_devlink->devlink_ctx;
 307
 308         devlink_unregister(devlink_ctx);
 309         ipc_devlink_destroy_region(ipc_devlink);
 310         devlink_params_unregister(devlink_ctx, iosm_devlink_params,
 311                                   ARRAY_SIZE(iosm_devlink_params));
 312         if (ipc_devlink->devlink_sio.devlink_read_pend) {
 313                 complete(&ipc_devlink->devlink_sio.read_sem);
 314                 complete(&ipc_devlink->devlink_sio.channel->ul_sem);
 315         }
 316         if (!ipc_devlink->devlink_sio.devlink_read_pend)
 317                 skb_queue_purge(&ipc_devlink->devlink_sio.rx_list);
 318
 319         ipc_imem_sys_devlink_close(ipc_devlink);
 320         devlink_free(devlink_ctx);
 321 }