From: Michal Wajdeczko Date: Mon, 26 Mar 2018 19:48:28 +0000 (+0000) Subject: drm/i915/guc: Trace messages from CT while in debug X-Git-Tag: v5.15~6763^2~28^2~1528 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0a015ff9730c169aa0d581e3f7727752ba3ff5b3;p=platform%2Fkernel%2Flinux-starfive.git drm/i915/guc: Trace messages from CT while in debug During debug we may want to investigate all communication from the Guc. Add proper tracing macros in debug config. v2: convert remaining DRM_DEBUG into new CT_DEBUG (Michal) v3: use dedicated Kconfig (Daniele) v4: checkpatch Signed-off-by: Michal Wajdeczko Cc: Daniele Ceraolo Spurio Cc: Chris Wilson Acked-by: Daniele Ceraolo Spurio Signed-off-by: Chris Wilson Link: https://patchwork.freedesktop.org/patch/msgid/20180326194829.58836-12-michal.wajdeczko@intel.com --- diff --git a/drivers/gpu/drm/i915/Kconfig.debug b/drivers/gpu/drm/i915/Kconfig.debug index dd5bf63..80efee1 100644 --- a/drivers/gpu/drm/i915/Kconfig.debug +++ b/drivers/gpu/drm/i915/Kconfig.debug @@ -90,6 +90,18 @@ config DRM_I915_SW_FENCE_CHECK_DAG If in doubt, say "N". +config DRM_I915_DEBUG_GUC + bool "Enable additional driver debugging for GuC" + depends on DRM_I915 + default n + help + Choose this option to turn on extra driver debugging that may affect + performance but will help resolve GuC related issues. + + Recommended for driver developers only. + + If in doubt, say "N". + config DRM_I915_SELFTEST bool "Enable selftests upon driver load" depends on DRM_I915 diff --git a/drivers/gpu/drm/i915/intel_guc_ct.c b/drivers/gpu/drm/i915/intel_guc_ct.c index e837084..990141d 100644 --- a/drivers/gpu/drm/i915/intel_guc_ct.c +++ b/drivers/gpu/drm/i915/intel_guc_ct.c @@ -24,6 +24,12 @@ #include "i915_drv.h" #include "intel_guc_ct.h" +#ifdef CONFIG_DRM_I915_DEBUG_GUC +#define CT_DEBUG_DRIVER(...) DRM_DEBUG_DRIVER(__VA_ARGS__) +#else +#define CT_DEBUG_DRIVER(...) do { } while (0) +#endif + struct ct_request { struct list_head link; u32 fence; @@ -78,8 +84,8 @@ static inline const char *guc_ct_buffer_type_to_str(u32 type) static void guc_ct_buffer_desc_init(struct guc_ct_buffer_desc *desc, u32 cmds_addr, u32 size, u32 owner) { - DRM_DEBUG_DRIVER("CT: desc %p init addr=%#x size=%u owner=%u\n", - desc, cmds_addr, size, owner); + CT_DEBUG_DRIVER("CT: desc %p init addr=%#x size=%u owner=%u\n", + desc, cmds_addr, size, owner); memset(desc, 0, sizeof(*desc)); desc->addr = cmds_addr; desc->size = size; @@ -88,8 +94,8 @@ static void guc_ct_buffer_desc_init(struct guc_ct_buffer_desc *desc, static void guc_ct_buffer_desc_reset(struct guc_ct_buffer_desc *desc) { - DRM_DEBUG_DRIVER("CT: desc %p reset head=%u tail=%u\n", - desc, desc->head, desc->tail); + CT_DEBUG_DRIVER("CT: desc %p reset head=%u tail=%u\n", + desc, desc->head, desc->tail); desc->head = 0; desc->tail = 0; desc->is_in_error = 0; @@ -185,8 +191,8 @@ static int ctch_init(struct intel_guc *guc, err = PTR_ERR(blob); goto err_vma; } - DRM_DEBUG_DRIVER("CT: vma base=%#x\n", - intel_guc_ggtt_offset(guc, ctch->vma)); + CT_DEBUG_DRIVER("CT: vma base=%#x\n", + intel_guc_ggtt_offset(guc, ctch->vma)); /* store pointers to desc and cmds */ for (i = 0; i < ARRAY_SIZE(ctch->ctbs); i++) { @@ -200,8 +206,8 @@ static int ctch_init(struct intel_guc *guc, err_vma: i915_vma_unpin_and_release(&ctch->vma); err_out: - DRM_DEBUG_DRIVER("CT: channel %d initialization failed; err=%d\n", - ctch->owner, err); + CT_DEBUG_DRIVER("CT: channel %d initialization failed; err=%d\n", + ctch->owner, err); return err; } @@ -221,8 +227,8 @@ static int ctch_open(struct intel_guc *guc, int err; int i; - DRM_DEBUG_DRIVER("CT: channel %d reopen=%s\n", - ctch->owner, yesno(ctch_is_open(ctch))); + CT_DEBUG_DRIVER("CT: channel %d reopen=%s\n", + ctch->owner, yesno(ctch_is_open(ctch))); if (!ctch->vma) { err = ctch_init(guc, ctch); @@ -355,6 +361,10 @@ static int ctb_write(struct intel_guc_ct_buffer *ctb, (want_response ? GUC_CT_MSG_SEND_STATUS : 0) | (action[0] << GUC_CT_MSG_ACTION_SHIFT); + CT_DEBUG_DRIVER("CT: writing %*phn %*phn %*phn\n", + 4, &header, 4, &fence, + 4 * (len - 1), &action[1]); + cmds[tail] = header; tail = (tail + 1) % size; @@ -545,6 +555,9 @@ static int intel_guc_send_ct(struct intel_guc *guc, const u32 *action, u32 len, if (unlikely(ret < 0)) { DRM_ERROR("CT: send action %#X failed; err=%d status=%#X\n", action[0], ret, status); + } else if (unlikely(ret)) { + CT_DEBUG_DRIVER("CT: send action %#x returned %d (%#x)\n", + action[0], ret, ret); } mutex_unlock(&guc->send_mutex); @@ -591,6 +604,7 @@ static int ctb_read(struct intel_guc_ct_buffer *ctb, u32 *data) /* beware of buffer wrap case */ if (unlikely(available < 0)) available += size; + CT_DEBUG_DRIVER("CT: available %d (%u:%u)\n", available, head, tail); GEM_BUG_ON(available < 0); data[0] = cmds[head]; @@ -612,6 +626,7 @@ static int ctb_read(struct intel_guc_ct_buffer *ctb, u32 *data) data[i] = cmds[head]; head = (head + 1) % size; } + CT_DEBUG_DRIVER("CT: received %*phn\n", 4 * len, data); desc->head = head * 4; return 0; @@ -665,11 +680,13 @@ static int ct_handle_response(struct intel_guc_ct *ct, const u32 *msg) return -EPROTO; } + CT_DEBUG_DRIVER("CT: response fence %u status %#x\n", fence, status); + spin_lock(&ct->lock); list_for_each_entry(req, &ct->pending_requests, link) { if (unlikely(fence != req->fence)) { - DRM_DEBUG_DRIVER("CT: request %u awaits response\n", - req->fence); + CT_DEBUG_DRIVER("CT: request %u awaits response\n", + req->fence); continue; } if (unlikely(datalen > req->response_len)) { @@ -696,6 +713,8 @@ static void ct_process_request(struct intel_guc_ct *ct, { struct intel_guc *guc = ct_to_guc(ct); + CT_DEBUG_DRIVER("CT: request %x %*phn\n", action, 4 * len, payload); + switch (action) { case INTEL_GUC_ACTION_DEFAULT: if (unlikely(len < 1))