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 #include <linux/vmalloc.h>
   6
   7 #include "iosm_ipc_chnl_cfg.h"
   8 #include "iosm_ipc_coredump.h"
   9 #include "iosm_ipc_devlink.h"
  10 #include "iosm_ipc_flash.h"
  11
  12 /* Coredump list */
  13 static struct iosm_coredump_file_info list[IOSM_NOF_CD_REGION] = {
  14         {"report.json", REPORT_JSON_SIZE,},
  15         {"coredump.fcd", COREDUMP_FCD_SIZE,},
  16         {"cdd.log", CDD_LOG_SIZE,},
  17         {"eeprom.bin", EEPROM_BIN_SIZE,},
  18         {"bootcore_trace.bin", BOOTCORE_TRC_BIN_SIZE,},
  19         {"bootcore_prev_trace.bin", BOOTCORE_PREV_TRC_BIN_SIZE,},
  20 };
  21
  22 /* Get the param values for the specific param ID's */
  23 static int ipc_devlink_get_param(struct devlink *dl, u32 id,
  24                                  struct devlink_param_gset_ctx *ctx)
  25 {
  26         struct iosm_devlink *ipc_devlink = devlink_priv(dl);
  27
  28         if (id == IOSM_DEVLINK_PARAM_ID_ERASE_FULL_FLASH)
  29                 ctx->val.vu8 = ipc_devlink->param.erase_full_flash;
  30
  31         return 0;
  32 }
  33
  34 /* Set the param values for the specific param ID's */
  35 static int ipc_devlink_set_param(struct devlink *dl, u32 id,
  36                                  struct devlink_param_gset_ctx *ctx)
  37 {
  38         struct iosm_devlink *ipc_devlink = devlink_priv(dl);
  39
  40         if (id == IOSM_DEVLINK_PARAM_ID_ERASE_FULL_FLASH)
  41                 ipc_devlink->param.erase_full_flash = ctx->val.vu8;
  42
  43         return 0;
  44 }
  45
  46 /* Devlink param structure array */
  47 static const struct devlink_param iosm_devlink_params[] = {
  48         DEVLINK_PARAM_DRIVER(IOSM_DEVLINK_PARAM_ID_ERASE_FULL_FLASH,
  49                              "erase_full_flash", DEVLINK_PARAM_TYPE_BOOL,
  50                              BIT(DEVLINK_PARAM_CMODE_RUNTIME),
  51                              ipc_devlink_get_param, ipc_devlink_set_param,
  52                              NULL),
  53 };
  54
  55 /* Get devlink flash component type */
  56 static enum iosm_flash_comp_type
  57 ipc_devlink_get_flash_comp_type(const char comp_str[], u32 len)
  58 {
  59         enum iosm_flash_comp_type fls_type;
  60
  61         if (!strncmp("PSI", comp_str, len))
  62                 fls_type = FLASH_COMP_TYPE_PSI;
  63         else if (!strncmp("EBL", comp_str, len))
  64                 fls_type = FLASH_COMP_TYPE_EBL;
  65         else if (!strncmp("FLS", comp_str, len))
  66                 fls_type = FLASH_COMP_TYPE_FLS;
  67         else
  68                 fls_type = FLASH_COMP_TYPE_INVAL;
  69
  70         return fls_type;
  71 }
  72
  73 /* Function triggered on devlink flash command
  74  * Flash update function which calls multiple functions based on
  75  * component type specified in the flash command
  76  */
  77 static int ipc_devlink_flash_update(struct devlink *devlink,
  78                                     struct devlink_flash_update_params *params,
  79                                     struct netlink_ext_ack *extack)
  80 {
  81         struct iosm_devlink *ipc_devlink = devlink_priv(devlink);
  82         enum iosm_flash_comp_type fls_type;
  83         struct iosm_devlink_image *header;
  84         int rc = -EINVAL;
  85         u8 *mdm_rsp;
  86
  87         header = (struct iosm_devlink_image *)params->fw->data;
  88
  89         if (!header || params->fw->size <= IOSM_DEVLINK_HDR_SIZE ||
  90             (memcmp(header->magic_header, IOSM_DEVLINK_MAGIC_HEADER,
  91              IOSM_DEVLINK_MAGIC_HEADER_LEN) != 0))
  92                 return -EINVAL;
  93
  94         mdm_rsp = kzalloc(IOSM_EBL_DW_PACK_SIZE, GFP_KERNEL);
  95         if (!mdm_rsp)
  96                 return -ENOMEM;
  97
  98         fls_type = ipc_devlink_get_flash_comp_type(header->image_type,
  99                                                    IOSM_DEVLINK_MAX_IMG_LEN);
 100
 101         switch (fls_type) {
 102         case FLASH_COMP_TYPE_PSI:
 103                 rc = ipc_flash_boot_psi(ipc_devlink, params->fw);
 104                 break;
 105         case FLASH_COMP_TYPE_EBL:
 106                 rc = ipc_flash_boot_ebl(ipc_devlink, params->fw);
 107                 if (rc)
 108                         break;
 109                 rc = ipc_flash_boot_set_capabilities(ipc_devlink, mdm_rsp);
 110                 if (rc)
 111                         break;
 112                 rc = ipc_flash_read_swid(ipc_devlink, mdm_rsp);
 113                 break;
 114         case FLASH_COMP_TYPE_FLS:
 115                 rc = ipc_flash_send_fls(ipc_devlink, params->fw, mdm_rsp);
 116                 break;
 117         default:
 118                 devlink_flash_update_status_notify(devlink, "Invalid component",
 119                                                    NULL, 0, 0);
 120                 break;
 121         }
 122
 123         if (!rc)
 124                 devlink_flash_update_status_notify(devlink, "Flashing success",
 125                                                    header->image_type, 0, 0);
 126         else
 127                 devlink_flash_update_status_notify(devlink, "Flashing failed",
 128                                                    header->image_type, 0, 0);
 129
 130         kfree(mdm_rsp);
 131         return rc;
 132 }
 133
 134 /* Call back function for devlink ops */
 135 static const struct devlink_ops devlink_flash_ops = {
 136         .flash_update = ipc_devlink_flash_update,
 137 };
 138
 139 /**
 140  * ipc_devlink_send_cmd - Send command to Modem
 141  * @ipc_devlink: Pointer to struct iosm_devlink
 142  * @cmd:         Command to be sent to modem
 143  * @entry:       Command entry number
 144  *
 145  * Returns:      0 on success and failure value on error
 146  */
 147 int ipc_devlink_send_cmd(struct iosm_devlink *ipc_devlink, u16 cmd, u32 entry)
 148 {
 149         struct iosm_rpsi_cmd rpsi_cmd;
 150
 151         rpsi_cmd.param.dword = cpu_to_le32(entry);
 152         rpsi_cmd.cmd = cpu_to_le16(cmd);
 153         rpsi_cmd.crc = rpsi_cmd.param.word[0] ^ rpsi_cmd.param.word[1] ^
 154                        rpsi_cmd.cmd;
 155
 156         return ipc_imem_sys_devlink_write(ipc_devlink, (u8 *)&rpsi_cmd,
 157                                           sizeof(rpsi_cmd));
 158 }
 159
 160 /* Function to create snapshot */
 161 static int ipc_devlink_coredump_snapshot(struct devlink *dl,
 162                                          const struct devlink_region_ops *ops,
 163                                          struct netlink_ext_ack *extack,
 164                                          u8 **data)
 165 {
 166         struct iosm_devlink *ipc_devlink = devlink_priv(dl);
 167         struct iosm_coredump_file_info *cd_list = ops->priv;
 168         u32 region_size;
 169         int rc;
 170
 171         dev_dbg(ipc_devlink->dev, "Region:%s, ID:%d", ops->name,
 172                 cd_list->entry);
 173         region_size = cd_list->default_size;
 174         rc = ipc_coredump_collect(ipc_devlink, data, cd_list->entry,
 175                                   region_size);
 176         if (rc) {
 177                 dev_err(ipc_devlink->dev, "Fail to create snapshot,err %d", rc);
 178                 goto coredump_collect_err;
 179         }
 180
 181         /* Send coredump end cmd indicating end of coredump collection */
 182         if (cd_list->entry == (IOSM_NOF_CD_REGION - 1))
 183                 ipc_coredump_get_list(ipc_devlink, rpsi_cmd_coredump_end);
 184
 185         return 0;
 186
 187 coredump_collect_err:
 188         ipc_coredump_get_list(ipc_devlink, rpsi_cmd_coredump_end);
 189         return rc;
 190 }
 191
 192 /* To create regions for coredump files */
 193 static int ipc_devlink_create_region(struct iosm_devlink *devlink)
 194 {
 195         struct devlink_region_ops *mdm_coredump;
 196         int rc = 0;
 197         int i;
 198
 199         mdm_coredump = devlink->iosm_devlink_mdm_coredump;
 200         for (i = 0; i < IOSM_NOF_CD_REGION; i++) {
 201                 mdm_coredump[i].name = list[i].filename;
 202                 mdm_coredump[i].snapshot = ipc_devlink_coredump_snapshot;
 203                 mdm_coredump[i].destructor = vfree;
 204                 devlink->cd_regions[i] =
 205                         devlink_region_create(devlink->devlink_ctx,
 206                                               &mdm_coredump[i], MAX_SNAPSHOTS,
 207                                               list[i].default_size);
 208
 209                 if (IS_ERR(devlink->cd_regions[i])) {
 210                         rc = PTR_ERR(devlink->cd_regions[i]);
 211                         dev_err(devlink->dev, "Devlink region fail,err %d", rc);
 212                         /* Delete previously created regions */
 213                         for ( ; i >= 0; i--)
 214                                 devlink_region_destroy(devlink->cd_regions[i]);
 215                         goto region_create_fail;
 216                 }
 217                 list[i].entry = i;
 218                 mdm_coredump[i].priv = list + i;
 219         }
 220 region_create_fail:
 221         return rc;
 222 }
 223
 224 /* To Destroy devlink regions */
 225 static void ipc_devlink_destroy_region(struct iosm_devlink *ipc_devlink)
 226 {
 227         u8 i;
 228
 229         for (i = 0; i < IOSM_NOF_CD_REGION; i++)
 230                 devlink_region_destroy(ipc_devlink->cd_regions[i]);
 231 }
 232
 233 /**
 234  * ipc_devlink_init - Initialize/register devlink to IOSM driver
 235  * @ipc_imem:   Pointer to struct iosm_imem
 236  *
 237  * Returns:     Pointer to iosm_devlink on success and NULL on failure
 238  */
 239 struct iosm_devlink *ipc_devlink_init(struct iosm_imem *ipc_imem)
 240 {
 241         struct ipc_chnl_cfg chnl_cfg_flash = { 0 };
 242         struct iosm_devlink *ipc_devlink;
 243         struct devlink *devlink_ctx;
 244         int rc;
 245
 246         devlink_ctx = devlink_alloc(&devlink_flash_ops,
 247                                     sizeof(struct iosm_devlink),
 248                                     ipc_imem->dev);
 249         if (!devlink_ctx) {
 250                 dev_err(ipc_imem->dev, "devlink_alloc failed");
 251                 goto devlink_alloc_fail;
 252         }
 253
 254         ipc_devlink = devlink_priv(devlink_ctx);
 255         ipc_devlink->devlink_ctx = devlink_ctx;
 256         ipc_devlink->pcie = ipc_imem->pcie;
 257         ipc_devlink->dev = ipc_imem->dev;
 258
 259         rc = devlink_params_register(devlink_ctx, iosm_devlink_params,
 260                                      ARRAY_SIZE(iosm_devlink_params));
 261         if (rc) {
 262                 dev_err(ipc_devlink->dev,
 263                         "devlink_params_register failed. rc %d", rc);
 264                 goto param_reg_fail;
 265         }
 266
 267         ipc_devlink->cd_file_info = list;
 268
 269         rc = ipc_devlink_create_region(ipc_devlink);
 270         if (rc) {
 271                 dev_err(ipc_devlink->dev, "Devlink Region create failed, rc %d",
 272                         rc);
 273                 goto region_create_fail;
 274         }
 275
 276         if (ipc_chnl_cfg_get(&chnl_cfg_flash, IPC_MEM_CTRL_CHL_ID_7) < 0)
 277                 goto chnl_get_fail;
 278
 279         ipc_imem_channel_init(ipc_imem, IPC_CTYPE_CTRL,
 280                               chnl_cfg_flash, IRQ_MOD_OFF);
 281
 282         init_completion(&ipc_devlink->devlink_sio.read_sem);
 283         skb_queue_head_init(&ipc_devlink->devlink_sio.rx_list);
 284
 285         devlink_register(devlink_ctx);
 286         dev_dbg(ipc_devlink->dev, "iosm devlink register success");
 287
 288         return ipc_devlink;
 289
 290 chnl_get_fail:
 291         ipc_devlink_destroy_region(ipc_devlink);
 292 region_create_fail:
 293         devlink_params_unregister(devlink_ctx, iosm_devlink_params,
 294                                   ARRAY_SIZE(iosm_devlink_params));
 295 param_reg_fail:
 296         devlink_free(devlink_ctx);
 297 devlink_alloc_fail:
 298         return NULL;
 299 }
 300
 301 /**
 302  * ipc_devlink_deinit - To unintialize the devlink from IOSM driver.
 303  * @ipc_devlink:        Devlink instance
 304  */
 305 void ipc_devlink_deinit(struct iosm_devlink *ipc_devlink)
 306 {
 307         struct devlink *devlink_ctx = ipc_devlink->devlink_ctx;
 308
 309         devlink_unregister(devlink_ctx);
 310         ipc_devlink_destroy_region(ipc_devlink);
 311         devlink_params_unregister(devlink_ctx, iosm_devlink_params,
 312                                   ARRAY_SIZE(iosm_devlink_params));
 313         if (ipc_devlink->devlink_sio.devlink_read_pend) {
 314                 complete(&ipc_devlink->devlink_sio.read_sem);
 315                 complete(&ipc_devlink->devlink_sio.channel->ul_sem);
 316         }
 317         if (!ipc_devlink->devlink_sio.devlink_read_pend)
 318                 skb_queue_purge(&ipc_devlink->devlink_sio.rx_list);
 319
 320         ipc_imem_sys_devlink_close(ipc_devlink);
 321         devlink_free(devlink_ctx);
 322 }