diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/atom.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/atom.c | 32 |
1 files changed, 20 insertions, 12 deletions
diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c index b7fe660985c..247f8ee7e94 100644 --- a/drivers/gpu/drm/radeon/atom.c +++ b/drivers/gpu/drm/radeon/atom.c @@ -1295,12 +1295,16 @@ void atom_destroy(struct atom_context *ctx) kfree(ctx); } -void atom_parse_data_header(struct atom_context *ctx, int index, +bool atom_parse_data_header(struct atom_context *ctx, int index, uint16_t * size, uint8_t * frev, uint8_t * crev, uint16_t * data_start) { int offset = index * 2 + 4; int idx = CU16(ctx->data_table + offset); + u16 *mdt = (u16 *)(ctx->bios + ctx->data_table + 4); + + if (!mdt[index]) + return false; if (size) *size = CU16(idx); @@ -1309,38 +1313,42 @@ void atom_parse_data_header(struct atom_context *ctx, int index, if (crev) *crev = CU8(idx + 3); *data_start = idx; - return; + return true; } -void atom_parse_cmd_header(struct atom_context *ctx, int index, uint8_t * frev, +bool atom_parse_cmd_header(struct atom_context *ctx, int index, uint8_t * frev, uint8_t * crev) { int offset = index * 2 + 4; int idx = CU16(ctx->cmd_table + offset); + u16 *mct = (u16 *)(ctx->bios + ctx->cmd_table + 4); + + if (!mct[index]) + return false; if (frev) *frev = CU8(idx + 2); if (crev) *crev = CU8(idx + 3); - return; + return true; } int atom_allocate_fb_scratch(struct atom_context *ctx) { int index = GetIndexIntoMasterTable(DATA, VRAM_UsageByFirmware); uint16_t data_offset; - int usage_bytes; + int usage_bytes = 0; struct _ATOM_VRAM_USAGE_BY_FIRMWARE *firmware_usage; - atom_parse_data_header(ctx, index, NULL, NULL, NULL, &data_offset); + if (atom_parse_data_header(ctx, index, NULL, NULL, NULL, &data_offset)) { + firmware_usage = (struct _ATOM_VRAM_USAGE_BY_FIRMWARE *)(ctx->bios + data_offset); - firmware_usage = (struct _ATOM_VRAM_USAGE_BY_FIRMWARE *)(ctx->bios + data_offset); + DRM_DEBUG("atom firmware requested %08x %dkb\n", + firmware_usage->asFirmwareVramReserveInfo[0].ulStartAddrUsedByFirmware, + firmware_usage->asFirmwareVramReserveInfo[0].usFirmwareUseInKb); - DRM_DEBUG("atom firmware requested %08x %dkb\n", - firmware_usage->asFirmwareVramReserveInfo[0].ulStartAddrUsedByFirmware, - firmware_usage->asFirmwareVramReserveInfo[0].usFirmwareUseInKb); - - usage_bytes = firmware_usage->asFirmwareVramReserveInfo[0].usFirmwareUseInKb * 1024; + usage_bytes = firmware_usage->asFirmwareVramReserveInfo[0].usFirmwareUseInKb * 1024; + } if (usage_bytes == 0) usage_bytes = 20 * 1024; /* allocate some scratch memory */ |