From d8a5b7d79fb7de60d9f0b9c56ebd8ef9f507d362 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Wed, 26 Sep 2018 16:34:13 +0300 Subject: [PATCH] drm/i915/csr: keep max firmware size together with firmare name and version Move max firmware size to the same if ladder with firmware name and required version. This allows us to detect the missing max size for a platform without actually loading the firmware, and makes the whole thing easier to maintain. We need to move the power get earlier to allow for early return in the missing platform case. While at it, extend the comment on why we return with the reference held on errors. We also need to move the module parameter override later to reuse the max firmware size, which is independent of the override. v2: Add comment on why we leak the wakeref on errors (Chris) v3: Rebase Reviewed-by: Chris Wilson Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20180926133414.22073-2-jani.nikula@intel.com --- drivers/gpu/drm/i915/i915_drv.h | 3 ++- drivers/gpu/drm/i915/intel_csr.c | 46 ++++++++++++++++++-------------- 2 files changed, 28 insertions(+), 21 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 37f5fcf1644d..9e185f0a822a 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -466,8 +466,9 @@ struct intel_csr { struct work_struct work; const char *fw_path; uint32_t required_version; + uint32_t max_fw_size; /* bytes */ uint32_t *dmc_payload; - uint32_t dmc_fw_size; + uint32_t dmc_fw_size; /* dwords */ uint32_t version; uint32_t mmio_count; i915_reg_t mmioaddr[8]; diff --git a/drivers/gpu/drm/i915/intel_csr.c b/drivers/gpu/drm/i915/intel_csr.c index ee277ec33996..b3a084c48a94 100644 --- a/drivers/gpu/drm/i915/intel_csr.c +++ b/drivers/gpu/drm/i915/intel_csr.c @@ -284,7 +284,6 @@ static uint32_t *parse_csr_fw(struct drm_i915_private *dev_priv, struct intel_csr *csr = &dev_priv->csr; const struct stepping_info *si = intel_get_stepping_info(dev_priv); uint32_t dmc_offset = CSR_DEFAULT_FW_OFFSET, readcount = 0, nbytes; - uint32_t max_fw_size = 0; uint32_t i; uint32_t *dmc_payload; @@ -381,15 +380,7 @@ static uint32_t *parse_csr_fw(struct drm_i915_private *dev_priv, /* fw_size is in dwords, so multiplied by 4 to convert into bytes. */ nbytes = dmc_header->fw_size * 4; - if (INTEL_GEN(dev_priv) >= 11) - max_fw_size = ICL_CSR_MAX_FW_SIZE; - else if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) - max_fw_size = GLK_CSR_MAX_FW_SIZE; - else if (IS_GEN9(dev_priv)) - max_fw_size = BXT_CSR_MAX_FW_SIZE; - else - MISSING_CASE(INTEL_REVID(dev_priv)); - if (nbytes > max_fw_size) { + if (nbytes > csr->max_fw_size) { DRM_ERROR("DMC FW too big (%u bytes)\n", nbytes); return NULL; } @@ -454,35 +445,50 @@ void intel_csr_ucode_init(struct drm_i915_private *dev_priv) if (!HAS_CSR(dev_priv)) return; - if (i915_modparams.dmc_firmware_path) { - csr->fw_path = i915_modparams.dmc_firmware_path; - /* Bypass version check for firmware override. */ - csr->required_version = 0; - } else if (IS_ICELAKE(dev_priv)) { + /* + * Obtain a runtime pm reference, until CSR is loaded, to avoid entering + * runtime-suspend. + * + * On error, we return with the rpm wakeref held to prevent runtime + * suspend as runtime suspend *requires* a working CSR for whatever + * reason. + */ + intel_display_power_get(dev_priv, POWER_DOMAIN_INIT); + + if (IS_ICELAKE(dev_priv)) { csr->fw_path = I915_CSR_ICL; csr->required_version = ICL_CSR_VERSION_REQUIRED; + csr->max_fw_size = ICL_CSR_MAX_FW_SIZE; } else if (IS_CANNONLAKE(dev_priv)) { csr->fw_path = I915_CSR_CNL; csr->required_version = CNL_CSR_VERSION_REQUIRED; + csr->max_fw_size = GLK_CSR_MAX_FW_SIZE; } else if (IS_GEMINILAKE(dev_priv)) { csr->fw_path = I915_CSR_GLK; csr->required_version = GLK_CSR_VERSION_REQUIRED; + csr->max_fw_size = GLK_CSR_MAX_FW_SIZE; } else if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv)) { csr->fw_path = I915_CSR_KBL; csr->required_version = KBL_CSR_VERSION_REQUIRED; + csr->max_fw_size = BXT_CSR_MAX_FW_SIZE; } else if (IS_SKYLAKE(dev_priv)) { csr->fw_path = I915_CSR_SKL; csr->required_version = SKL_CSR_VERSION_REQUIRED; + csr->max_fw_size = BXT_CSR_MAX_FW_SIZE; } else if (IS_BROXTON(dev_priv)) { csr->fw_path = I915_CSR_BXT; csr->required_version = BXT_CSR_VERSION_REQUIRED; + csr->max_fw_size = BXT_CSR_MAX_FW_SIZE; + } else { + MISSING_CASE(INTEL_REVID(dev_priv)); + return; } - /* - * Obtain a runtime pm reference, until CSR is loaded, - * to avoid entering runtime-suspend. - */ - intel_display_power_get(dev_priv, POWER_DOMAIN_INIT); + if (i915_modparams.dmc_firmware_path) { + csr->fw_path = i915_modparams.dmc_firmware_path; + /* Bypass version check for firmware override. */ + csr->required_version = 0; + } if (csr->fw_path == NULL) { DRM_DEBUG_KMS("No known CSR firmware for platform, disabling runtime PM\n"); -- 2.30.2