Hi,
just few random nits below
-Michal
On 23.11.2021 00:03, Alan Previn wrote:
> Update GuC ADS size allocation to include space for
> the lists of error state capture register descriptors.
>
> Also, populate the lists of registers we want GuC to report back to
> Host on engine reset events. This list should include global,
> engine-class and engine-instance registers for every engine-class
> type on the current hardware.
>
> NOTE: Start with a fake table of register lists to layout the
> framework before adding real registers in subsequent patch.
>
> Signed-off-by: Alan Previn <alan.previn.teres.alexis@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/Makefile | 1 +
> drivers/gpu/drm/i915/gt/uc/intel_guc.c | 10 +-
> drivers/gpu/drm/i915/gt/uc/intel_guc.h | 5 +
> drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c | 176 ++++++++++++-
> .../gpu/drm/i915/gt/uc/intel_guc_capture.c | 232 ++++++++++++++++++
> .../gpu/drm/i915/gt/uc/intel_guc_capture.h | 47 ++++
> drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h | 19 +-
> 7 files changed, 476 insertions(+), 14 deletions(-)
> create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c
> create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_capture.h
>
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index 074d6b8edd23..e3c4d5cea4c3 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -190,6 +190,7 @@ i915-y += gt/uc/intel_uc.o \
> gt/uc/intel_guc_rc.o \
> gt/uc/intel_guc_slpc.o \
> gt/uc/intel_guc_submission.o \
> + gt/uc/intel_guc_capture.o \
use alphabetical order
> gt/uc/intel_huc.o \
> gt/uc/intel_huc_debugfs.o \
> gt/uc/intel_huc_fw.o
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> index 5cf9ebd2ee55..458f0d248a5a 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> @@ -335,9 +335,14 @@ int intel_guc_init(struct intel_guc *guc)
> if (ret)
> goto err_fw;
>
> - ret = intel_guc_ads_create(guc);
> + ret = intel_guc_capture_init(guc);
> if (ret)
> goto err_log;
> +
> + ret = intel_guc_ads_create(guc);
> + if (ret)
> + goto err_capture;
> +
> GEM_BUG_ON(!guc->ads_vma);
>
> ret = intel_guc_ct_init(&guc->ct);
> @@ -376,6 +381,8 @@ int intel_guc_init(struct intel_guc *guc)
> intel_guc_ct_fini(&guc->ct);
> err_ads:
> intel_guc_ads_destroy(guc);
> +err_capture:
> + intel_guc_capture_destroy(guc);
> err_log:
> intel_guc_log_destroy(&guc->log);
> err_fw:
> @@ -403,6 +410,7 @@ void intel_guc_fini(struct intel_guc *guc)
> intel_guc_ct_fini(&guc->ct);
>
> intel_guc_ads_destroy(guc);
> + intel_guc_capture_destroy(guc);
> intel_guc_log_destroy(&guc->log);
> intel_uc_fw_fini(&guc->fw);
> }
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
> index 9de99772f916..d136c69abe12 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
> @@ -16,6 +16,7 @@
> #include "intel_guc_log.h"
> #include "intel_guc_reg.h"
> #include "intel_guc_slpc_types.h"
> +#include "intel_guc_capture.h"
use alphabetical order
> #include "intel_uc_fw.h"
> #include "i915_utils.h"
> #include "i915_vma.h"
> @@ -37,6 +38,8 @@ struct intel_guc {
> struct intel_guc_ct ct;
> /** @slpc: sub-structure containing SLPC related data and objects */
> struct intel_guc_slpc slpc;
> + /** @capture: the error-state-capture module's data and objects */
> + struct intel_guc_state_capture capture;
>
> /** @sched_engine: Global engine used to submit requests to GuC */
> struct i915_sched_engine *sched_engine;
> @@ -138,6 +141,8 @@ struct intel_guc {
> u32 ads_regset_size;
> /** @ads_golden_ctxt_size: size of the golden contexts in the ADS */
> u32 ads_golden_ctxt_size;
> + /** @ads_capture_size: size of register lists in the ADS used for error capture */
> + u32 ads_capture_size;
> /** @ads_engine_usage_size: size of engine usage in the ADS */
> u32 ads_engine_usage_size;
>
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
> index 6c81ddd303d3..2780c0fadd01 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
> @@ -10,6 +10,7 @@
> #include "gt/shmem_utils.h"
> #include "intel_guc_ads.h"
> #include "intel_guc_fwif.h"
> +#include "intel_guc_capture.h"
wrong order
> #include "intel_uc.h"
> #include "i915_drv.h"
>
> @@ -71,8 +72,7 @@ static u32 guc_ads_golden_ctxt_size(struct intel_guc *guc)
>
> static u32 guc_ads_capture_size(struct intel_guc *guc)
> {
> - /* Basic support to init ADS without a proper GuC error capture list */
> - return PAGE_ALIGN(PAGE_SIZE);
> + return PAGE_ALIGN(guc->ads_capture_size);
> }
>
> static u32 guc_ads_private_data_size(struct intel_guc *guc)
> @@ -519,24 +519,170 @@ static void guc_init_golden_context(struct intel_guc *guc)
> GEM_BUG_ON(guc->ads_golden_ctxt_size != total_size);
> }
>
> -static void guc_capture_prep_lists(struct intel_guc *guc, struct __guc_ads_blob *blob)
> +static int
> +guc_fill_reglist(struct intel_guc *guc, struct __guc_ads_blob *blob, int vf, bool enabled,
> + int classid, int type, char *typename, u16 *p_numregs, int newnum, u8 **p_virt_ptr,
> + u32 *p_blobptr_to_ggtt, u32 *p_ggtt, u32 null_ggtt)
hmm, this does not look good - do we really need all these params ?
> {
> - int i, j;
> - u32 addr_ggtt, offset;
> + struct drm_i915_private *i915 = guc_to_gt(guc)->i915;
> + struct guc_debug_capture_list *listnode;
> + int size = 0;
>
> - offset = guc_ads_capture_offset(guc);
> - addr_ggtt = intel_guc_ggtt_offset(guc, guc->ads_vma) + offset;
> + if (blob && *p_numregs != newnum) {
> + if (type == GUC_CAPTURE_LIST_TYPE_GLOBAL)
> + drm_warn(&i915->drm, "Guc-Cap VF%d-%s num-reg mismatch was=%d now=%d!\n",
> + vf, typename, *p_numregs, newnum);
> + else
> + drm_warn(&i915->drm, "Guc-Cap VF%d-Class-%d-%s num-reg mismatch was=%d now=%d!\n",
> + vf, classid, typename, *p_numregs, newnum);
> + }
> + /*
> + * For enabled capture lists, we not only need to call capture module to help
> + * populate the list-descriptor into the correct ads capture structures, but
> + * we also need to increment the virtual pointers and ggtt offsets so that
> + * caller has the subsequent gfx memory location.
> + */
> + *p_numregs = newnum;
> + size = PAGE_ALIGN((sizeof(struct guc_debug_capture_list)) +
> + (newnum * sizeof(struct guc_mmio_reg)));
> + /* if caller hasn't allocated ADS blob, return size and counts, we're done */
> + if (!blob)
> + return size;
> + if (blob) {
redundant
> + /* if caller allocated ADS blob, populate the capture register descriptors */
> + if (!newnum) {
> + *p_blobptr_to_ggtt = null_ggtt;
> + } else {
> + /* get ptr and populate header info: */
> + *p_blobptr_to_ggtt = *p_ggtt;
> + listnode = (struct guc_debug_capture_list *)*p_virt_ptr;
> + *p_ggtt += sizeof(struct guc_debug_capture_list);
> + *p_virt_ptr += sizeof(struct guc_debug_capture_list);
> + listnode->header.info = FIELD_PREP(GUC_CAPTURELISTHDR_NUMDESCR, *p_numregs);
> +
> + /* get ptr and populate register descriptor list: */
> + intel_guc_capture_list_init(guc, vf, type, classid,
> + (struct guc_mmio_reg *)*p_virt_ptr,
> + *p_numregs);
> +
> + /* increment ptrs for that header: */
> + *p_ggtt += size - sizeof(struct guc_debug_capture_list);
> + *p_virt_ptr += size - sizeof(struct guc_debug_capture_list);
> + }
> + }
> +
> + return size;
> +}
> +
> +static int guc_capture_prep_lists(struct intel_guc *guc, struct __guc_ads_blob *blob)
> +{
> + struct intel_gt *gt = guc_to_gt(guc);
> + int i, j, size;
> + u32 ggtt, null_ggtt, offset, alloc_size = 0;
> + struct guc_gt_system_info *info, local_info;
> + struct guc_debug_capture_list *listnode;
> + struct drm_i915_private *i915 = guc_to_gt(guc)->i915;
> + struct intel_guc_state_capture *gc = &guc->capture;
> + u16 tmp = 0;
> + u8 *ptr = NULL;
> +
> + if (blob) {
> + offset = guc_ads_capture_offset(guc);
> + ggtt = intel_guc_ggtt_offset(guc, guc->ads_vma) + offset;
> + ptr = ((u8 *)blob) + offset;
> + info = &blob->system_info;
> + } else {
> + memset(&local_info, 0, sizeof(local_info));
> + info = &local_info;
> + fill_engine_enable_masks(gt, info);
> + }
> +
> + /* first, set aside the first page for a capture_list with zero descriptors */
> + alloc_size = PAGE_SIZE;
> + if (blob) {
> + listnode = (struct guc_debug_capture_list *)ptr;
> + listnode->header.info = FIELD_PREP(GUC_CAPTURELISTHDR_NUMDESCR, 0);
> + null_ggtt = ggtt;
> + ggtt += PAGE_SIZE;
> + ptr += PAGE_SIZE;
> + }
>
> - /* FIXME: Populate a proper capture list */
> +#define COUNT_REGS intel_guc_capture_list_count
> +#define FILL_REGS guc_fill_reglist
> +#define TYPE_CLASS GUC_CAPTURE_LIST_TYPE_ENGINE_CLASS
> +#define TYPE_INSTANCE GUC_CAPTURE_LIST_TYPE_ENGINE_INSTANCE
>
> for (i = 0; i < GUC_CAPTURE_LIST_INDEX_MAX; i++) {
> for (j = 0; j < GUC_MAX_ENGINE_CLASSES; j++) {
> - blob->ads.capture_instance[i][j] = addr_ggtt;
> - blob->ads.capture_class[i][j] = addr_ggtt;
> + if (!info->engine_enabled_masks[j]) {
> + if (gc->num_class_regs[i][j])
> + drm_warn(&i915->drm, "GuC-Cap VF%d-class-%d "
> + "class regs valid mismatch was=%d now=%d!\n",
> + i, j, gc->num_class_regs[i][j], tmp);
> + if (gc->num_instance_regs[i][j])
> + drm_warn(&i915->drm, "GuC-Cap VF%d-class-%d "
> + "inst regs valid mismatch was=%d now=%d!\n",
> + i, j, gc->num_instance_regs[i][j], tmp);
> + gc->num_class_regs[i][j] = 0;
> + gc->num_instance_regs[i][j] = 0;
> + if (blob) {
> + blob->ads.capture_class[i][j] = null_ggtt;
> + blob->ads.capture_instance[i][j] = null_ggtt;
> + }
> + } else {
> + if (!COUNT_REGS(guc, i, TYPE_CLASS,
> + guc_class_to_engine_class(j), &tmp)) {
> + size = FILL_REGS(guc, blob, i, true, j, TYPE_CLASS,
> + "class", &gc->num_class_regs[i][j],
> + tmp, &ptr,
> + &blob->ads.capture_class[i][j],
> + &ggtt, null_ggtt);
> + gc->class_list_size += size;
> + alloc_size += size;
> + } else {
> + gc->num_class_regs[i][j] = 0;
> + if (blob)
> + blob->ads.capture_class[i][j] = null_ggtt;
> + }
> + if (!COUNT_REGS(guc, i, TYPE_INSTANCE,
> + guc_class_to_engine_class(j), &tmp)) {
> + size = FILL_REGS(guc, blob, i, true, j, TYPE_INSTANCE,
> + "instance", &gc->num_instance_regs[i][j],
> + tmp, &ptr,
> + &blob->ads.capture_instance[i][j],
> + &ggtt, null_ggtt);
> + gc->instance_list_size += size;
> + alloc_size += size;
> + } else {
> + gc->num_instance_regs[i][j] = 0;
> + if (blob)
> + blob->ads.capture_instance[i][j] = null_ggtt;
> + }
> + }
> + }
> + if (!COUNT_REGS(guc, i, GUC_CAPTURE_LIST_TYPE_GLOBAL, 0, &tmp)) {
> + size = FILL_REGS(guc, blob, i, true, 0, GUC_CAPTURE_LIST_TYPE_GLOBAL,
> + "global", &gc->num_global_regs[i], tmp, &ptr,
> + &blob->ads.capture_global[i], &ggtt, null_ggtt);
> + gc->global_list_size += size;
> + alloc_size += size;
> + } else {
> + gc->num_global_regs[i] = 0;
> + if (blob)
> + blob->ads.capture_global[i] = null_ggtt;
> }
> -
> - blob->ads.capture_global[i] = addr_ggtt;
> }
> +
> +#undef COUNT_REGS
> +#undef FILL_REGS
> +#undef TYPE_CLASS
> +#undef TYPE_INSTANCE
> +
> + if (guc->ads_capture_size && guc->ads_capture_size != PAGE_ALIGN(alloc_size))
> + drm_warn(&i915->drm, "GuC->ADS->Capture alloc size changed from %d to %d\n",
> + guc->ads_capture_size, PAGE_ALIGN(alloc_size));
> +
> + return PAGE_ALIGN(alloc_size);
> }
>
> static void __guc_ads_init(struct intel_guc *guc)
> @@ -614,6 +760,12 @@ int intel_guc_ads_create(struct intel_guc *guc)
> return ret;
> guc->ads_golden_ctxt_size = ret;
>
> + /* Likewise the capture lists: */
> + ret = guc_capture_prep_lists(guc, NULL);
> + if (ret < 0)
> + return ret;
> + guc->ads_capture_size = ret;
> +
> /* Now the total size can be determined: */
> size = guc_ads_blob_size(guc);
>
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c
> new file mode 100644
> index 000000000000..c741c77b7fc8
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c
> @@ -0,0 +1,232 @@
> +// SPDX-License-Identifier: MIT
> +/*
> + * Copyright © 2021-2021 Intel Corporation
> + */
> +
> +#include <drm/drm_print.h>
> +
> +#include "i915_drv.h"
> +#include "i915_drv.h"
duplicated include
> +#include "i915_memcpy.h"
> +#include "gt/intel_gt.h"
> +
> +#include "intel_guc_fwif.h"
> +#include "intel_guc_capture.h"
> +
> +/* Define all device tables of GuC error capture register lists */
> +
> +/********************************* Gen12 LP *********************************/
didn't we move away from "GEN" naming ?
> +/************** GLOBAL *************/
do we really need all these decorations ?
> +struct __guc_mmio_reg_descr gen12lp_global_regs[] = {
> + {SWF_ILK(0), 0, 0, "SWF_ILK0"},
> + /* Add additional register list */
do we need this reminder ?
> +};
> +
> +/********** RENDER/COMPUTE *********/
> +/* Per-Class */
> +struct __guc_mmio_reg_descr gen12lp_rc_class_regs[] = {
> + {SWF_ILK(0), 0, 0, "SWF_ILK0"},
> + /* Add additional register list */
> +};
> +
> +/* Per-Engine-Instance */
> +struct __guc_mmio_reg_descr gen12lp_rc_inst_regs[] = {
> + {SWF_ILK(0), 0, 0, "SWF_ILK0"},
> + /* Add additional register list */
> +};
> +
> +/************* MEDIA-VD ************/
> +/* Per-Class */
> +struct __guc_mmio_reg_descr gen12lp_vd_class_regs[] = {
> + {SWF_ILK(0), 0, 0, "SWF_ILK0"},
> + /* Add additional register list */
> +};
> +
> +/* Per-Engine-Instance */
> +struct __guc_mmio_reg_descr gen12lp_vd_inst_regs[] = {
> + {SWF_ILK(0), 0, 0, "SWF_ILK0"},
> + /* Add additional register list */
> +};
> +
> +/************* MEDIA-VEC ***********/
> +/* Per-Class */
> +struct __guc_mmio_reg_descr gen12lp_vec_class_regs[] = {
> + {SWF_ILK(0), 0, 0, "SWF_ILK0"},
> + /* Add additional register list */
> +};
> +
> +/* Per-Engine-Instance */
> +struct __guc_mmio_reg_descr gen12lp_vec_inst_regs[] = {
> + {SWF_ILK(0), 0, 0, "SWF_ILK0"},
> + /* Add additional register list */
> +};
> +
> +/********** List of lists **********/
> +struct __guc_mmio_reg_descr_group gen12lp_lists[] = {
> + {
> + .list = gen12lp_global_regs,
> + .num_regs = (sizeof(gen12lp_global_regs) / sizeof(struct __guc_mmio_reg_descr)),
ARRAY_SIZE ?
> + .owner = GUC_CAPTURE_LIST_INDEX_PF,
> + .type = GUC_CAPTURE_LIST_TYPE_GLOBAL,
> + .engine = 0
> + },
> + {
> + .list = gen12lp_rc_class_regs,
> + .num_regs = (sizeof(gen12lp_rc_class_regs) / sizeof(struct __guc_mmio_reg_descr)),
> + .owner = GUC_CAPTURE_LIST_INDEX_PF,
> + .type = GUC_CAPTURE_LIST_TYPE_ENGINE_CLASS,
> + .engine = RENDER_CLASS
> + },
> + {
> + .list = gen12lp_rc_inst_regs,
> + .num_regs = (sizeof(gen12lp_rc_inst_regs) / sizeof(struct __guc_mmio_reg_descr)),
> + .owner = GUC_CAPTURE_LIST_INDEX_PF,
> + .type = GUC_CAPTURE_LIST_TYPE_ENGINE_INSTANCE,
> + .engine = RENDER_CLASS
> + },
> + {
> + .list = gen12lp_vd_class_regs,
> + .num_regs = (sizeof(gen12lp_vd_class_regs) / sizeof(struct __guc_mmio_reg_descr)),
> + .owner = GUC_CAPTURE_LIST_INDEX_PF,
> + .type = GUC_CAPTURE_LIST_TYPE_ENGINE_CLASS,
> + .engine = VIDEO_DECODE_CLASS
> + },
> + {
> + .list = gen12lp_vd_inst_regs,
> + .num_regs = (sizeof(gen12lp_vd_inst_regs) / sizeof(struct __guc_mmio_reg_descr)),
> + .owner = GUC_CAPTURE_LIST_INDEX_PF,
> + .type = GUC_CAPTURE_LIST_TYPE_ENGINE_INSTANCE,
> + .engine = VIDEO_DECODE_CLASS
> + },
> + {
> + .list = gen12lp_vec_class_regs,
> + .num_regs = (sizeof(gen12lp_vec_class_regs) / sizeof(struct __guc_mmio_reg_descr)),
> + .owner = GUC_CAPTURE_LIST_INDEX_PF,
> + .type = GUC_CAPTURE_LIST_TYPE_ENGINE_CLASS,
> + .engine = VIDEO_ENHANCEMENT_CLASS
> + },
> + {
> + .list = gen12lp_vec_inst_regs,
> + .num_regs = (sizeof(gen12lp_vec_inst_regs) / sizeof(struct __guc_mmio_reg_descr)),
> + .owner = GUC_CAPTURE_LIST_INDEX_PF,
> + .type = GUC_CAPTURE_LIST_TYPE_ENGINE_INSTANCE,
> + .engine = VIDEO_ENHANCEMENT_CLASS
> + },
> + {NULL, 0, 0, 0, 0}
> +};
> +
> +/************ FIXME: Populate tables for other devices in subsequent patch ************/
> +
> +static struct __guc_mmio_reg_descr_group *
> +guc_capture_get_device_reglist(struct drm_i915_private *dev_priv)
in new code we are using "i915" instead of "dev_priv" and since this
function has "guc" prefix it shall rather take "guc" as param:
guc_capture_get_device_reglist(struct intel_guc *guc)
{
struct drm_i915_private *i915 = guc_to_gt(guc)->i915;
...
> +{
> + if (IS_TIGERLAKE(dev_priv) || IS_ROCKETLAKE(dev_priv) ||
> + IS_ALDERLAKE_S(dev_priv) || IS_ALDERLAKE_P(dev_priv)) {
> + return gen12lp_lists;
> + }
> +
> + return NULL;
> +}
> +
> +static inline struct __guc_mmio_reg_descr_group *
> +guc_capture_get_one_list(struct __guc_mmio_reg_descr_group *reglists, u32 owner, u32 type, u32 id)
> +{
> + int i = 0;
> +
> + if (!reglists)
> + return NULL;
> + while (reglists[i].list) {
> + if (reglists[i].owner == owner &&
> + reglists[i].type == type) {
> + if (reglists[i].type == GUC_CAPTURE_LIST_TYPE_GLOBAL ||
> + reglists[i].engine == id) {
> + return ®lists[i];
> + }
> + }
> + ++i;
> + }
> + return NULL;
> +}
> +
> +static inline void
> +warn_with_capture_list_identifier(struct drm_i915_private *i915, char *msg,
> + u32 owner, u32 type, u32 classid)
> +{
> + const char *ownerstr[GUC_CAPTURE_LIST_INDEX_MAX] = {"PF", "VF"};
> + const char *typestr[GUC_CAPTURE_LIST_TYPE_MAX - 1] = {"Class", "Instance"};
> + const char *classstr[GUC_LAST_ENGINE_CLASS + 1] = {"Render", "Video", "VideoEnhance",
> + "Blitter", "Reserved"};
better to wrap that into simple small helpers like
const char *stringify_guc_capture_owner(u32 owner) { .. }
const char *stringify_guc_capture_type(u32 type) { .. }
const char *stringify_guc_capture_class(u32 class) { .. }
> + static const char unknownstr[] = "unknown";
> +
> + if (type == GUC_CAPTURE_LIST_TYPE_GLOBAL)
> + drm_warn(&i915->drm, "GuC-capture: %s for %s Global-Registers.\n", msg,
> + (owner < GUC_CAPTURE_LIST_INDEX_MAX) ? ownerstr[owner] : unknownstr);
> + else
> + drm_warn(&i915->drm, "GuC-capture: %s for %s %s-Registers on %s-Engine\n", msg,
> + (owner < GUC_CAPTURE_LIST_INDEX_MAX) ? ownerstr[owner] : unknownstr,
> + (type < GUC_CAPTURE_LIST_TYPE_MAX) ? typestr[type - 1] : unknownstr,
> + (classid < GUC_LAST_ENGINE_CLASS + 1) ? classstr[classid] : unknownstr);
> +}
> +
> +int intel_guc_capture_list_count(struct intel_guc *guc, u32 owner, u32 type, u32 classid,
> + u16 *num_entries)
> +{
> + struct drm_i915_private *dev_priv = (guc_to_gt(guc))->i915;
s/dev_priv/i915
redundant ()
> + struct __guc_mmio_reg_descr_group *reglists = guc->capture.reglists;
> + struct __guc_mmio_reg_descr_group *match;
> +
> + if (!reglists)
> + return -ENODEV;
> +
> + match = guc_capture_get_one_list(reglists, owner, type, classid);
> + if (match) {
> + *num_entries = match->num_regs;
> + return 0;
IIRC early returns are preferred for error cases, not success
> + }
> +
> + warn_with_capture_list_identifier(dev_priv, "Missing register list size", owner, type,
> + classid);
> +
> + return -ENODATA;
> +}
> +
> +int intel_guc_capture_list_init(struct intel_guc *guc, u32 owner, u32 type, u32 classid,
> + struct guc_mmio_reg *ptr, u16 num_entries)
> +{
> + u32 j = 0;
> + struct drm_i915_private *dev_priv = (guc_to_gt(guc))->i915;
s/dev_priv/i915
redundant ()
> + struct __guc_mmio_reg_descr_group *reglists = guc->capture.reglists;
> + struct __guc_mmio_reg_descr_group *match;
> +
> + if (!reglists)
> + return -ENODEV;
> +
> + match = guc_capture_get_one_list(reglists, owner, type, classid);
> + if (match) {
> + while (j < num_entries && j < match->num_regs) {
> + ptr[j].offset = match->list[j].reg.reg;
> + ptr[j].value = 0xDEADF00D;
> + ptr[j].flags = match->list[j].flags;
> + ptr[j].mask = match->list[j].mask;
> + ++j;
> + }
> + return 0;
> + }
> +
> + warn_with_capture_list_identifier(dev_priv, "Missing register list init", owner, type,
> + classid);
> +
> + return -ENODATA;
> +}
> +
> +void intel_guc_capture_destroy(struct intel_guc *guc)
> +{
> +}
> +
> +int intel_guc_capture_init(struct intel_guc *guc)
> +{
> + struct drm_i915_private *dev_priv = (guc_to_gt(guc))->i915;
> +
> + guc->capture.reglists = guc_capture_get_device_reglist(dev_priv);
> + return 0;
> +}
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.h
> new file mode 100644
> index 000000000000..352940b8bc87
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_capture.h
> @@ -0,0 +1,47 @@
> +/* SPDX-License-Identifier: MIT */
> +/*
> + * Copyright © 2021-2021 Intel Corporation
> + */
> +
> +#ifndef _INTEL_GUC_CAPTURE_H
> +#define _INTEL_GUC_CAPTURE_H
> +
> +#include <linux/mutex.h>
> +#include <linux/workqueue.h>
> +#include "intel_guc_fwif.h"
> +
> +struct intel_guc;
> +
> +struct __guc_mmio_reg_descr {
> + i915_reg_t reg;
> + u32 flags;
> + u32 mask;
> + char *regname;
const char* ?
but maybe instead of adding reg name to the GuC specific struct we
should add generic purpose function that will return pretty name of the
register:
i915_reg.c:
const char *i915_reg_to_string(i915_reg_r reg)
{
...
}
> +};
> +
> +struct __guc_mmio_reg_descr_group {
> + struct __guc_mmio_reg_descr *list;
> + u32 num_regs;
> + u32 owner; /* see enum guc_capture_owner */
> + u32 type; /* see enum guc_capture_type */
> + u32 engine; /* as per MAX_ENGINE_CLASS */
> +};
> +
> +struct intel_guc_state_capture {
> + struct __guc_mmio_reg_descr_group *reglists;
> + u16 num_instance_regs[GUC_CAPTURE_LIST_INDEX_MAX][GUC_MAX_ENGINE_CLASSES];
> + u16 num_class_regs[GUC_CAPTURE_LIST_INDEX_MAX][GUC_MAX_ENGINE_CLASSES];
> + u16 num_global_regs[GUC_CAPTURE_LIST_INDEX_MAX];
> + int instance_list_size;
> + int class_list_size;
> + int global_list_size;
> +};
> +
> +int intel_guc_capture_list_count(struct intel_guc *guc, u32 owner, u32 type, u32 class,
> + u16 *num_entries);
> +int intel_guc_capture_list_init(struct intel_guc *guc, u32 owner, u32 type, u32 class,
> + struct guc_mmio_reg *ptr, u16 num_entries);
> +void intel_guc_capture_destroy(struct intel_guc *guc);
> +int intel_guc_capture_init(struct intel_guc *guc);
> +
> +#endif /* _INTEL_GUC_CAPTURE_H */
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
> index 767684b6af67..1a1d2271c7e9 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
> @@ -285,13 +285,30 @@ struct guc_gt_system_info {
> } __packed;
>
> /* Capture-types of GuC capture register lists */
> -enum
> +enum guc_capture_owner
> {
> GUC_CAPTURE_LIST_INDEX_PF = 0,
> GUC_CAPTURE_LIST_INDEX_VF = 1,
> GUC_CAPTURE_LIST_INDEX_MAX = 2,
s/INDEX/OWNER ?
> };
>
> +/*Register-types of GuC capture register lists */
> +enum guc_capture_type {
> + GUC_CAPTURE_LIST_TYPE_GLOBAL = 0,
> + GUC_CAPTURE_LIST_TYPE_ENGINE_CLASS,
> + GUC_CAPTURE_LIST_TYPE_ENGINE_INSTANCE,
> + GUC_CAPTURE_LIST_TYPE_MAX,
> +};
> +
> +struct guc_debug_capture_list_header {
> + u32 info;
> + #define GUC_CAPTURELISTHDR_NUMDESCR GENMASK(15, 0)
> +};
> +
> +struct guc_debug_capture_list {
> + struct guc_debug_capture_list_header header;
> +};
> +
> /* GuC Additional Data Struct */
> struct guc_ads {
> struct guc_mmio_reg_set reg_state_list[GUC_MAX_ENGINE_CLASSES][GUC_MAX_INSTANCES_PER_CLASS];
>
