diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gpu_error.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gpu_error.c | 108 |
1 files changed, 105 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c index 0e4b832dff84..7582ef34bf3f 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.c +++ b/drivers/gpu/drm/i915/i915_gpu_error.c @@ -685,6 +685,74 @@ static void err_print_guc_ctb(struct drm_i915_error_state_buf *m, ctb->head, ctb->tail, ctb->desc_offset, ctb->cmds_offset, ctb->size); } +/* This list includes registers that are useful in debugging GuC hangs. */ +const struct { + u32 start; + u32 count; +} guc_hw_reg_state[] = { + { 0xc0b0, 2 }, + { 0xc000, 65 }, + { 0xc140, 1 }, + { 0xc180, 16 }, + { 0xc1dc, 10 }, + { 0xc300, 79 }, + { 0xc4b4, 47 }, + { 0xc574, 1 }, + { 0xc57c, 1 }, + { 0xc584, 11 }, + { 0xc5c0, 8 }, + { 0xc5e4, 1 }, + { 0xc5ec, 103 }, + { 0xc7c0, 1 }, + { 0xc0b0, 2 } +}; + +static u32 print_range_line(struct drm_i915_error_state_buf *m, u32 start, u32 *dump, u32 count) +{ + if (count >= 8) { + err_printf(m, "[0x%04x] 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n", + start, dump[0], dump[1], dump[2], dump[3], + dump[4], dump[5], dump[6], dump[7]); + return 8; + } else if (count >= 4) { + err_printf(m, "[0x%04x] 0x%08x 0x%08x 0x%08x 0x%08x\n", + start, dump[0], dump[1], dump[2], dump[3]); + return 4; + } else if (count >= 2) { + err_printf(m, "[0x%04x] 0x%08x 0x%08x\n", start, dump[0], dump[1]); + return 2; + } + + err_printf(m, "[0x%04x] 0x%08x\n", start, dump[0]); + return 1; +} + +static void err_print_guc_hw_state(struct drm_i915_error_state_buf *m, u32 *hw_state) +{ + u32 total = 0; + int i; + + if (!hw_state) + return; + + err_printf(m, "GuC Register State:\n"); + + for (i = 0; i < ARRAY_SIZE(guc_hw_reg_state); i++) { + u32 entry = 0; + + while (entry < guc_hw_reg_state[i].count) { + u32 start = guc_hw_reg_state[i].start + entry * sizeof(u32); + u32 count = guc_hw_reg_state[i].count - entry; + u32 *values = hw_state + total + entry; + + entry += print_range_line(m, start, values, count); + } + + GEM_BUG_ON(entry != guc_hw_reg_state[i].count); + total += entry; + } +} + static void err_print_uc(struct drm_i915_error_state_buf *m, const struct intel_uc_coredump *error_uc) { @@ -693,6 +761,7 @@ static void err_print_uc(struct drm_i915_error_state_buf *m, intel_uc_fw_dump(&error_uc->guc_fw, &p); intel_uc_fw_dump(&error_uc->huc_fw, &p); err_printf(m, "GuC timestamp: 0x%08x\n", error_uc->guc.timestamp); + err_print_guc_hw_state(m, error_uc->guc.hw_state); intel_gpu_error_print_vma(m, NULL, error_uc->guc.vma_log); err_printf(m, "GuC CTB fence: %d\n", error_uc->guc.last_fence); err_print_guc_ctb(m, "Send", error_uc->guc.ctb + 0); @@ -1025,6 +1094,7 @@ static void cleanup_uc(struct intel_uc_coredump *uc) kfree(uc->huc_fw.file_wanted.path); i915_vma_coredump_free(uc->guc.vma_log); i915_vma_coredump_free(uc->guc.vma_ctb); + kfree(uc->guc.hw_state); kfree(uc); } @@ -1721,6 +1791,37 @@ static void gt_record_guc_ctb(struct intel_ctb_coredump *saved, saved->cmds_offset = ((void *)ctb->cmds) - blob_ptr; } +static u32 read_guc_state_reg(struct intel_uncore *uncore, int range, int count) +{ + GEM_BUG_ON(range >= ARRAY_SIZE(guc_hw_reg_state)); + GEM_BUG_ON(count >= guc_hw_reg_state[range].count); + + return intel_uncore_read(uncore, + _MMIO(guc_hw_reg_state[range].start + count * sizeof(u32))); +} + +static void gt_record_guc_hw_state(struct intel_uncore *uncore, + struct intel_uc_coredump *error_uc) +{ + u32 *hw_state; + u32 count = 0; + int i, j; + + for (i = 0; i < ARRAY_SIZE(guc_hw_reg_state); i++) + count += guc_hw_reg_state[i].count; + + hw_state = kcalloc(count, sizeof(u32), ALLOW_FAIL); + if (!hw_state) + return; + + count = 0; + for (i = 0; i < ARRAY_SIZE(guc_hw_reg_state); i++) + for (j = 0; j < guc_hw_reg_state[i].count; j++) + hw_state[count++] = read_guc_state_reg(uncore, i, j); + + error_uc->guc.hw_state = hw_state; +} + static struct intel_uc_coredump * gt_record_uc(struct intel_gt_coredump *gt, struct i915_vma_compress *compress) @@ -1755,6 +1856,7 @@ gt_record_uc(struct intel_gt_coredump *gt, uc->guc.ct.ctbs.send.desc, (struct intel_guc *)&uc->guc); gt_record_guc_ctb(error_uc->guc.ctb + 1, &uc->guc.ct.ctbs.recv, uc->guc.ct.ctbs.send.desc, (struct intel_guc *)&uc->guc); + gt_record_guc_hw_state(gt->_gt->uncore, error_uc); return error_uc; } @@ -2445,11 +2547,11 @@ static const struct file_operations i915_error_state_fops = { void i915_gpu_error_debugfs_register(struct drm_i915_private *i915) { - struct drm_minor *minor = i915->drm.primary; + struct dentry *debugfs_root = i915->drm.debugfs_root; - debugfs_create_file("i915_error_state", 0644, minor->debugfs_root, i915, + debugfs_create_file("i915_error_state", 0644, debugfs_root, i915, &i915_error_state_fops); - debugfs_create_file("i915_gpu_info", 0644, minor->debugfs_root, i915, + debugfs_create_file("i915_gpu_info", 0644, debugfs_root, i915, &i915_gpu_info_fops); } |