diff options
Diffstat (limited to '')
| -rw-r--r-- | Documentation/DocBook/drm.tmpl | 12 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_debugfs.c | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_guc_reg.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_guc_submission.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_guc.h | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_guc_fwif.h | 72 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_guc_loader.c | 95 |
7 files changed, 157 insertions, 45 deletions
diff --git a/Documentation/DocBook/drm.tmpl b/Documentation/DocBook/drm.tmpl index a249c73ec1b5..b45aac217f73 100644 --- a/Documentation/DocBook/drm.tmpl +++ b/Documentation/DocBook/drm.tmpl @@ -4239,17 +4239,21 @@ int num_ioctls;</synopsis> </sect2> </sect1> <sect1> - <title>GuC-based Command Submission</title> + <title>GuC</title> <sect2> - <title>GuC</title> + <title>GuC-specific firmware loader</title> !Pdrivers/gpu/drm/i915/intel_guc_loader.c GuC-specific firmware loader !Idrivers/gpu/drm/i915/intel_guc_loader.c </sect2> <sect2> - <title>GuC Client</title> -!Pdrivers/gpu/drm/i915/i915_guc_submission.c GuC-based command submissison + <title>GuC-based command submission</title> +!Pdrivers/gpu/drm/i915/i915_guc_submission.c GuC-based command submission !Idrivers/gpu/drm/i915/i915_guc_submission.c </sect2> + <sect2> + <title>GuC Firmware Layout</title> +!Pdrivers/gpu/drm/i915/intel_guc_fwif.h GuC Firmware Layout + </sect2> </sect1> <sect1> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 1676388a62df..cbbd7bb527c4 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2403,6 +2403,12 @@ static int i915_guc_load_status_info(struct seq_file *m, void *data) guc_fw->guc_fw_major_wanted, guc_fw->guc_fw_minor_wanted); seq_printf(m, "\tversion found: %d.%d\n", guc_fw->guc_fw_major_found, guc_fw->guc_fw_minor_found); + seq_printf(m, "\theader: offset is %d; size = %d\n", + guc_fw->header_offset, guc_fw->header_size); + seq_printf(m, "\tuCode: offset is %d; size = %d\n", + guc_fw->ucode_offset, guc_fw->ucode_size); + seq_printf(m, "\tRSA: offset is %d; size = %d\n", + guc_fw->rsa_offset, guc_fw->rsa_size); tmp = I915_READ(GUC_STATUS); diff --git a/drivers/gpu/drm/i915/i915_guc_reg.h b/drivers/gpu/drm/i915/i915_guc_reg.h index c4cb1c0c4d0d..b51b8286766f 100644 --- a/drivers/gpu/drm/i915/i915_guc_reg.h +++ b/drivers/gpu/drm/i915/i915_guc_reg.h @@ -42,6 +42,7 @@ #define SOFT_SCRATCH(n) (0xc180 + ((n) * 4)) #define UOS_RSA_SCRATCH(i) (0xc200 + (i) * 4) +#define UOS_RSA_SCRATCH_MAX_COUNT 64 #define DMA_ADDR_0_LOW 0xc300 #define DMA_ADDR_0_HIGH 0xc304 #define DMA_ADDR_1_LOW 0xc308 diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c index 4bf9aa54c75e..0a6b0071f712 100644 --- a/drivers/gpu/drm/i915/i915_guc_submission.c +++ b/drivers/gpu/drm/i915/i915_guc_submission.c @@ -27,7 +27,7 @@ #include "intel_guc.h" /** - * DOC: GuC Client + * DOC: GuC-based command submission * * i915_guc_client: * We use the term client to avoid confusion with contexts. A i915_guc_client is @@ -588,8 +588,7 @@ static void lr_context_update(struct drm_i915_gem_request *rq) /** * i915_guc_submit() - Submit commands through GuC * @client: the guc client where commands will go through - * @ctx: LRC where commands come from - * @ring: HW engine that will excute the commands + * @rq: request associated with the commands * * Return: 0 if succeed */ @@ -731,7 +730,8 @@ static void guc_client_free(struct drm_device *dev, * The kernel client to replace ExecList submission is created with * NORMAL priority. Priority of a client for scheduler can be HIGH, * while a preemption context can use CRITICAL. - * @ctx the context to own the client (we use the default render context) + * @ctx: the context that owns the client (we use the default render + * context) * * Return: An i915_guc_client object if success. */ diff --git a/drivers/gpu/drm/i915/intel_guc.h b/drivers/gpu/drm/i915/intel_guc.h index 081d5f648d26..5ba586683c87 100644 --- a/drivers/gpu/drm/i915/intel_guc.h +++ b/drivers/gpu/drm/i915/intel_guc.h @@ -76,11 +76,17 @@ struct intel_guc_fw { uint16_t guc_fw_minor_wanted; uint16_t guc_fw_major_found; uint16_t guc_fw_minor_found; + + uint32_t header_size; + uint32_t header_offset; + uint32_t rsa_size; + uint32_t rsa_offset; + uint32_t ucode_size; + uint32_t ucode_offset; }; struct intel_guc { struct intel_guc_fw guc_fw; - uint32_t log_flags; struct drm_i915_gem_object *log_obj; diff --git a/drivers/gpu/drm/i915/intel_guc_fwif.h b/drivers/gpu/drm/i915/intel_guc_fwif.h index 593d2f585978..40b2ea572e16 100644 --- a/drivers/gpu/drm/i915/intel_guc_fwif.h +++ b/drivers/gpu/drm/i915/intel_guc_fwif.h @@ -122,6 +122,78 @@ #define GUC_CTL_MAX_DWORDS (GUC_CTL_RSRVD + 1) +/** + * DOC: GuC Firmware Layout + * + * The GuC firmware layout looks like this: + * + * +-------------------------------+ + * | guc_css_header | + * | contains major/minor version | + * +-------------------------------+ + * | uCode | + * +-------------------------------+ + * | RSA signature | + * +-------------------------------+ + * | modulus key | + * +-------------------------------+ + * | exponent val | + * +-------------------------------+ + * + * The firmware may or may not have modulus key and exponent data. The header, + * uCode and RSA signature are must-have components that will be used by driver. + * Length of each components, which is all in dwords, can be found in header. + * In the case that modulus and exponent are not present in fw, a.k.a truncated + * image, the length value still appears in header. + * + * Driver will do some basic fw size validation based on the following rules: + * + * 1. Header, uCode and RSA are must-have components. + * 2. All firmware components, if they present, are in the sequence illustrated + * in the layout table above. + * 3. Length info of each component can be found in header, in dwords. + * 4. Modulus and exponent key are not required by driver. They may not appear + * in fw. So driver will load a truncated firmware in this case. + */ + +struct guc_css_header { + uint32_t module_type; + /* header_size includes all non-uCode bits, including css_header, rsa + * key, modulus key and exponent data. */ + uint32_t header_size_dw; + uint32_t header_version; + uint32_t module_id; + uint32_t module_vendor; + union { + struct { + uint8_t day; + uint8_t month; + uint16_t year; + }; + uint32_t date; + }; + uint32_t size_dw; /* uCode plus header_size_dw */ + uint32_t key_size_dw; + uint32_t modulus_size_dw; + uint32_t exponent_size_dw; + union { + struct { + uint8_t hour; + uint8_t min; + uint16_t sec; + }; + uint32_t time; + }; + + char username[8]; + char buildnumber[12]; + uint32_t device_id; + uint32_t guc_sw_version; + uint32_t prod_preprod_fw; + uint32_t reserved[12]; + uint32_t header_info; +} __packed; + struct guc_doorbell_info { u32 db_status; u32 cookie; diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c index ac31696012df..c0281df52702 100644 --- a/drivers/gpu/drm/i915/intel_guc_loader.c +++ b/drivers/gpu/drm/i915/intel_guc_loader.c @@ -31,7 +31,7 @@ #include "intel_guc.h" /** - * DOC: GuC + * DOC: GuC-specific firmware loader * * intel_guc: * Top level structure of guc. It handles firmware loading and manages client @@ -208,16 +208,6 @@ static inline bool guc_ucode_response(struct drm_i915_private *dev_priv, /* * Transfer the firmware image to RAM for execution by the microcontroller. * - * GuC Firmware layout: - * +-------------------------------+ ---- - * | CSS header | 128B - * | contains major/minor version | - * +-------------------------------+ ---- - * | uCode | - * +-------------------------------+ ---- - * | RSA signature | 256B - * +-------------------------------+ ---- - * * Architecturally, the DMA engine is bidirectional, and can potentially even * transfer between GTT locations. This functionality is left out of the API * for now as there is no need for it. @@ -225,33 +215,29 @@ static inline bool guc_ucode_response(struct drm_i915_private *dev_priv, * Note that GuC needs the CSS header plus uKernel code to be copied by the * DMA engine in one operation, whereas the RSA signature is loaded via MMIO. */ - -#define UOS_CSS_HEADER_OFFSET 0 -#define UOS_VER_MINOR_OFFSET 0x44 -#define UOS_VER_MAJOR_OFFSET 0x46 -#define UOS_CSS_HEADER_SIZE 0x80 -#define UOS_RSA_SIG_SIZE 0x100 - static int guc_ucode_xfer_dma(struct drm_i915_private *dev_priv) { struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw; struct drm_i915_gem_object *fw_obj = guc_fw->guc_fw_obj; unsigned long offset; struct sg_table *sg = fw_obj->pages; - u32 status, ucode_size, rsa[UOS_RSA_SIG_SIZE / sizeof(u32)]; + u32 status, rsa[UOS_RSA_SCRATCH_MAX_COUNT]; int i, ret = 0; - /* uCode size, also is where RSA signature starts */ - offset = ucode_size = guc_fw->guc_fw_size - UOS_RSA_SIG_SIZE; - I915_WRITE(DMA_COPY_SIZE, ucode_size); + /* where RSA signature starts */ + offset = guc_fw->rsa_offset; /* Copy RSA signature from the fw image to HW for verification */ - sg_pcopy_to_buffer(sg->sgl, sg->nents, rsa, UOS_RSA_SIG_SIZE, offset); - for (i = 0; i < UOS_RSA_SIG_SIZE / sizeof(u32); i++) + sg_pcopy_to_buffer(sg->sgl, sg->nents, rsa, sizeof(rsa), offset); + for (i = 0; i < UOS_RSA_SCRATCH_MAX_COUNT; i++) I915_WRITE(UOS_RSA_SCRATCH(i), rsa[i]); + /* The header plus uCode will be copied to WOPCM via DMA, excluding any + * other components */ + I915_WRITE(DMA_COPY_SIZE, guc_fw->header_size + guc_fw->ucode_size); + /* Set the source address for the new blob */ - offset = i915_gem_obj_ggtt_offset(fw_obj); + offset = i915_gem_obj_ggtt_offset(fw_obj) + guc_fw->header_offset; I915_WRITE(DMA_ADDR_0_LOW, lower_32_bits(offset)); I915_WRITE(DMA_ADDR_0_HIGH, upper_32_bits(offset) & 0xFFFF); @@ -457,10 +443,8 @@ static void guc_fw_fetch(struct drm_device *dev, struct intel_guc_fw *guc_fw) { struct drm_i915_gem_object *obj; const struct firmware *fw; - const u8 *css_header; - const size_t minsize = UOS_CSS_HEADER_SIZE + UOS_RSA_SIG_SIZE; - const size_t maxsize = GUC_WOPCM_SIZE_VALUE + UOS_RSA_SIG_SIZE - - 0x8000; /* 32k reserved (8K stack + 24k context) */ + struct guc_css_header *css; + size_t size; int err; DRM_DEBUG_DRIVER("before requesting firmware: GuC fw fetch status %s\n", @@ -474,12 +458,52 @@ static void guc_fw_fetch(struct drm_device *dev, struct intel_guc_fw *guc_fw) DRM_DEBUG_DRIVER("fetch GuC fw from %s succeeded, fw %p\n", guc_fw->guc_fw_path, fw); - DRM_DEBUG_DRIVER("firmware file size %zu (minimum %zu, maximum %zu)\n", - fw->size, minsize, maxsize); - /* Check the size of the blob befoe examining buffer contents */ - if (fw->size < minsize || fw->size > maxsize) + /* Check the size of the blob before examining buffer contents */ + if (fw->size < sizeof(struct guc_css_header)) { + DRM_ERROR("Firmware header is missing\n"); goto fail; + } + + css = (struct guc_css_header *)fw->data; + + /* Firmware bits always start from header */ + guc_fw->header_offset = 0; + guc_fw->header_size = (css->header_size_dw - css->modulus_size_dw - + css->key_size_dw - css->exponent_size_dw) * sizeof(u32); + + if (guc_fw->header_size != sizeof(struct guc_css_header)) { + DRM_ERROR("CSS header definition mismatch\n"); + goto fail; + } + + /* then, uCode */ + guc_fw->ucode_offset = guc_fw->header_offset + guc_fw->header_size; + guc_fw->ucode_size = (css->size_dw - css->header_size_dw) * sizeof(u32); + + /* now RSA */ + if (css->key_size_dw != UOS_RSA_SCRATCH_MAX_COUNT) { + DRM_ERROR("RSA key size is bad\n"); + goto fail; + } + guc_fw->rsa_offset = guc_fw->ucode_offset + guc_fw->ucode_size; + guc_fw->rsa_size = css->key_size_dw * sizeof(u32); + + /* At least, it should have header, uCode and RSA. Size of all three. */ + size = guc_fw->header_size + guc_fw->ucode_size + guc_fw->rsa_size; + if (fw->size < size) { + DRM_ERROR("Missing firmware components\n"); + goto fail; + } + + /* Header and uCode will be loaded to WOPCM. Size of the two. */ + size = guc_fw->header_size + guc_fw->ucode_size; + + /* Top 32k of WOPCM is reserved (8K stack + 24k RC6 context). */ + if (size > GUC_WOPCM_SIZE_VALUE - 0x8000) { + DRM_ERROR("Firmware is too large to fit in WOPCM\n"); + goto fail; + } /* * The GuC firmware image has the version number embedded at a well-known @@ -487,9 +511,8 @@ static void guc_fw_fetch(struct drm_device *dev, struct intel_guc_fw *guc_fw) * TWO bytes each (i.e. u16), although all pointers and offsets are defined * in terms of bytes (u8). */ - css_header = fw->data + UOS_CSS_HEADER_OFFSET; - guc_fw->guc_fw_major_found = *(u16 *)(css_header + UOS_VER_MAJOR_OFFSET); - guc_fw->guc_fw_minor_found = *(u16 *)(css_header + UOS_VER_MINOR_OFFSET); + guc_fw->guc_fw_major_found = css->guc_sw_version >> 16; + guc_fw->guc_fw_minor_found = css->guc_sw_version & 0xFFFF; if (guc_fw->guc_fw_major_found != guc_fw->guc_fw_major_wanted || guc_fw->guc_fw_minor_found < guc_fw->guc_fw_minor_wanted) { |