[PATCH] drm/i915/mtl: Handle wopcm per-GT and limit calculations.
John Harrison
john.c.harrison at intel.com
Wed Oct 26 01:33:59 UTC 2022
On 10/24/2022 15:26, Daniele Ceraolo Spurio wrote:
> From: Aravind Iddamsetty <aravind.iddamsetty at intel.com>
>
> With MTL standalone media architecture the wopcm layout has changed,
> with separate partitioning in WOPCM for the root GT GuC and the media
> GT GuC. The size of WOPCM is 4MB with the lower 2MB reserved for the
> media GT and the upper 2MB for the root GT.
>
> Given that MTL has GuC deprivilege, the WOPCM registers are pre-locked
> by the bios. Therefore, we can skip all the math for the partitioning
> and just limit ourselves to sanity-checking the values.
>
> v2: fix makefile file ordering (Jani)
> v3: drop XELPM_SAMEDIA_WOPCM_SIZE, check huc instead of VDBOX (John)
> v4: further clarify commit message, remove blank line (John)
>
> Signed-off-by: Aravind Iddamsetty <aravind.iddamsetty at intel.com>
> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
> Cc: Matt Roper <matthew.d.roper at intel.com>
> Cc: John Harrison <john.c.harrison at intel.com>
> Cc: Alan Previn <alan.previn.teres.alexis at intel.com>
> Cc: Jani Nikula <jani.nikula at linux.intel.com>
Reviewed-by: John Harrison <John.C.Harrison at Intel.com>
> ---
> Documentation/gpu/i915.rst | 2 +-
> drivers/gpu/drm/i915/Makefile | 5 ++-
> drivers/gpu/drm/i915/gt/intel_ggtt.c | 2 +-
> drivers/gpu/drm/i915/gt/intel_gt.c | 1 +
> drivers/gpu/drm/i915/gt/intel_gt_types.h | 2 +
> drivers/gpu/drm/i915/{ => gt}/intel_wopcm.c | 43 ++++++++++++++-------
> drivers/gpu/drm/i915/{ => gt}/intel_wopcm.h | 0
> drivers/gpu/drm/i915/gt/uc/intel_uc.c | 4 +-
> drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c | 14 ++++---
> drivers/gpu/drm/i915/i915_driver.c | 2 -
> drivers/gpu/drm/i915/i915_drv.h | 3 --
> drivers/gpu/drm/i915/i915_gem.c | 5 ++-
> 12 files changed, 51 insertions(+), 32 deletions(-)
> rename drivers/gpu/drm/i915/{ => gt}/intel_wopcm.c (87%)
> rename drivers/gpu/drm/i915/{ => gt}/intel_wopcm.h (100%)
>
> diff --git a/Documentation/gpu/i915.rst b/Documentation/gpu/i915.rst
> index 4e59db1cfb00..60ea21734902 100644
> --- a/Documentation/gpu/i915.rst
> +++ b/Documentation/gpu/i915.rst
> @@ -494,7 +494,7 @@ WOPCM
> WOPCM Layout
> ~~~~~~~~~~~~
>
> -.. kernel-doc:: drivers/gpu/drm/i915/intel_wopcm.c
> +.. kernel-doc:: drivers/gpu/drm/i915/gt/intel_wopcm.c
> :doc: WOPCM Layout
>
> GuC
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index 2535593ab379..cf3a96b3cd58 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -127,9 +127,11 @@ gt-y += \
> gt/intel_sseu.o \
> gt/intel_sseu_debugfs.o \
> gt/intel_timeline.o \
> + gt/intel_wopcm.o \
> gt/intel_workarounds.o \
> gt/shmem_utils.o \
> gt/sysfs_engines.o
> +
> # x86 intel-gtt module support
> gt-$(CONFIG_X86) += gt/intel_ggtt_gmch.o
> # autogenerated null render state
> @@ -183,8 +185,7 @@ i915-y += \
> i915_trace_points.o \
> i915_ttm_buddy_manager.o \
> i915_vma.o \
> - i915_vma_resource.o \
> - intel_wopcm.o
> + i915_vma_resource.o
>
> # general-purpose microcontroller (GuC) support
> i915-y += gt/uc/intel_uc.o \
> diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt.c b/drivers/gpu/drm/i915/gt/intel_ggtt.c
> index 6b58c95ad6a0..9263f10ecd28 100644
> --- a/drivers/gpu/drm/i915/gt/intel_ggtt.c
> +++ b/drivers/gpu/drm/i915/gt/intel_ggtt.c
> @@ -560,7 +560,7 @@ static int init_ggtt(struct i915_ggtt *ggtt)
> * why.
> */
> ggtt->pin_bias = max_t(u32, I915_GTT_PAGE_SIZE,
> - intel_wopcm_guc_size(&ggtt->vm.i915->wopcm));
> + intel_wopcm_guc_size(&ggtt->vm.gt->wopcm));
>
> ret = intel_vgt_balloon(ggtt);
> if (ret)
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
> index 27dbb9e4bd6c..8c751314df3d 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gt.c
> @@ -56,6 +56,7 @@ void intel_gt_common_init_early(struct intel_gt *gt)
> seqcount_mutex_init(>->tlb.seqno, >->tlb.invalidate_lock);
> intel_gt_pm_init_early(gt);
>
> + intel_wopcm_init_early(>->wopcm);
> intel_uc_init_early(>->uc);
> intel_rps_init_early(>->rps);
> }
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h b/drivers/gpu/drm/i915/gt/intel_gt_types.h
> index 64aa2ba624fc..2d18fd9ab11f 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt_types.h
> +++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h
> @@ -30,6 +30,7 @@
> #include "intel_migrate_types.h"
> #include "intel_wakeref.h"
> #include "pxp/intel_pxp_types.h"
> +#include "intel_wopcm.h"
>
> struct drm_i915_private;
> struct i915_ggtt;
> @@ -100,6 +101,7 @@ struct intel_gt {
>
> struct intel_uc uc;
> struct intel_gsc gsc;
> + struct intel_wopcm wopcm;
>
> struct {
> /* Serialize global tlb invalidations */
> diff --git a/drivers/gpu/drm/i915/intel_wopcm.c b/drivers/gpu/drm/i915/gt/intel_wopcm.c
> similarity index 87%
> rename from drivers/gpu/drm/i915/intel_wopcm.c
> rename to drivers/gpu/drm/i915/gt/intel_wopcm.c
> index 322fb9eeb880..7ebbcc191c2d 100644
> --- a/drivers/gpu/drm/i915/intel_wopcm.c
> +++ b/drivers/gpu/drm/i915/gt/intel_wopcm.c
> @@ -64,9 +64,9 @@
> #define GEN9_GUC_FW_RESERVED SZ_128K
> #define GEN9_GUC_WOPCM_OFFSET (GUC_WOPCM_RESERVED + GEN9_GUC_FW_RESERVED)
>
> -static inline struct drm_i915_private *wopcm_to_i915(struct intel_wopcm *wopcm)
> +static inline struct intel_gt *wopcm_to_gt(struct intel_wopcm *wopcm)
> {
> - return container_of(wopcm, struct drm_i915_private, wopcm);
> + return container_of(wopcm, struct intel_gt, wopcm);
> }
>
> /**
> @@ -77,7 +77,8 @@ static inline struct drm_i915_private *wopcm_to_i915(struct intel_wopcm *wopcm)
> */
> void intel_wopcm_init_early(struct intel_wopcm *wopcm)
> {
> - struct drm_i915_private *i915 = wopcm_to_i915(wopcm);
> + struct intel_gt *gt = wopcm_to_gt(wopcm);
> + struct drm_i915_private *i915 = gt->i915;
>
> if (!HAS_GT_UC(i915))
> return;
> @@ -157,10 +158,11 @@ static bool check_hw_restrictions(struct drm_i915_private *i915,
> return true;
> }
>
> -static bool __check_layout(struct drm_i915_private *i915, u32 wopcm_size,
> +static bool __check_layout(struct intel_gt *gt, u32 wopcm_size,
> u32 guc_wopcm_base, u32 guc_wopcm_size,
> u32 guc_fw_size, u32 huc_fw_size)
> {
> + struct drm_i915_private *i915 = gt->i915;
> const u32 ctx_rsvd = context_reserved_size(i915);
> u32 size;
>
> @@ -181,12 +183,14 @@ static bool __check_layout(struct drm_i915_private *i915, u32 wopcm_size,
> return false;
> }
>
> - size = huc_fw_size + WOPCM_RESERVED_SIZE;
> - if (unlikely(guc_wopcm_base < size)) {
> - drm_err(&i915->drm, "WOPCM: no space for %s: %uK < %uK\n",
> - intel_uc_fw_type_repr(INTEL_UC_FW_TYPE_HUC),
> - guc_wopcm_base / SZ_1K, size / SZ_1K);
> - return false;
> + if (intel_uc_supports_huc(>->uc)) {
> + size = huc_fw_size + WOPCM_RESERVED_SIZE;
> + if (unlikely(guc_wopcm_base < size)) {
> + drm_err(&i915->drm, "WOPCM: no space for %s: %uK < %uK\n",
> + intel_uc_fw_type_repr(INTEL_UC_FW_TYPE_HUC),
> + guc_wopcm_base / SZ_1K, size / SZ_1K);
> + return false;
> + }
> }
>
> return check_hw_restrictions(i915, guc_wopcm_base, guc_wopcm_size,
> @@ -228,8 +232,8 @@ static bool __wopcm_regs_writable(struct intel_uncore *uncore)
> */
> void intel_wopcm_init(struct intel_wopcm *wopcm)
> {
> - struct drm_i915_private *i915 = wopcm_to_i915(wopcm);
> - struct intel_gt *gt = to_gt(i915);
> + struct intel_gt *gt = wopcm_to_gt(wopcm);
> + struct drm_i915_private *i915 = gt->i915;
> u32 guc_fw_size = intel_uc_fw_get_upload_size(>->uc.guc.fw);
> u32 huc_fw_size = intel_uc_fw_get_upload_size(>->uc.huc.fw);
> u32 ctx_rsvd = context_reserved_size(i915);
> @@ -274,6 +278,19 @@ void intel_wopcm_init(struct intel_wopcm *wopcm)
> goto check;
> }
>
> + /*
> + * On platforms with a media GT, the WOPCM is partitioned between the
> + * two GTs, so we would have to take that into account when doing the
> + * math below. There is also a new section reserved for the GSC context
> + * that would have to be factored in. However, all platforms with a
> + * media GT also have GuC depriv enabled, so the WOPCM regs are
> + * pre-locked and therefore we don't have to do the math ourselves.
> + */
> + if (unlikely(i915->media_gt)) {
> + drm_err(&i915->drm, "Unlocked WOPCM regs with media GT\n");
> + return;
> + }
> +
> /*
> * Aligned value of guc_wopcm_base will determine available WOPCM space
> * for HuC firmware and mandatory reserved area.
> @@ -295,7 +312,7 @@ void intel_wopcm_init(struct intel_wopcm *wopcm)
> guc_wopcm_base / SZ_1K, guc_wopcm_size / SZ_1K);
>
> check:
> - if (__check_layout(i915, wopcm_size, guc_wopcm_base, guc_wopcm_size,
> + if (__check_layout(gt, wopcm_size, guc_wopcm_base, guc_wopcm_size,
> guc_fw_size, huc_fw_size)) {
> wopcm->guc.base = guc_wopcm_base;
> wopcm->guc.size = guc_wopcm_size;
> diff --git a/drivers/gpu/drm/i915/intel_wopcm.h b/drivers/gpu/drm/i915/gt/intel_wopcm.h
> similarity index 100%
> rename from drivers/gpu/drm/i915/intel_wopcm.h
> rename to drivers/gpu/drm/i915/gt/intel_wopcm.h
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
> index dbd048b77e19..4cd8a787f9e5 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
> @@ -357,8 +357,8 @@ static int uc_init_wopcm(struct intel_uc *uc)
> {
> struct intel_gt *gt = uc_to_gt(uc);
> struct intel_uncore *uncore = gt->uncore;
> - u32 base = intel_wopcm_guc_base(>->i915->wopcm);
> - u32 size = intel_wopcm_guc_size(>->i915->wopcm);
> + u32 base = intel_wopcm_guc_base(>->wopcm);
> + u32 size = intel_wopcm_guc_size(>->wopcm);
> u32 huc_agent = intel_uc_uses_huc(uc) ? HUC_LOADING_AGENT_GUC : 0;
> u32 mask;
> int err;
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
> index 81e06d71c1a8..0c80ba51a4bd 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
> @@ -478,10 +478,11 @@ static int check_gsc_manifest(const struct firmware *fw,
> return 0;
> }
>
> -static int check_ccs_header(struct drm_i915_private *i915,
> +static int check_ccs_header(struct intel_gt *gt,
> const struct firmware *fw,
> struct intel_uc_fw *uc_fw)
> {
> + struct drm_i915_private *i915 = gt->i915;
> struct uc_css_header *css;
> size_t size;
>
> @@ -523,10 +524,10 @@ static int check_ccs_header(struct drm_i915_private *i915,
>
> /* Sanity check whether this fw is not larger than whole WOPCM memory */
> size = __intel_uc_fw_get_upload_size(uc_fw);
> - if (unlikely(size >= i915->wopcm.size)) {
> + if (unlikely(size >= gt->wopcm.size)) {
> drm_warn(&i915->drm, "%s firmware %s: invalid size: %zu > %zu\n",
> intel_uc_fw_type_repr(uc_fw->type), uc_fw->file_selected.path,
> - size, (size_t)i915->wopcm.size);
> + size, (size_t)gt->wopcm.size);
> return -E2BIG;
> }
>
> @@ -554,7 +555,8 @@ static int check_ccs_header(struct drm_i915_private *i915,
> */
> int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw)
> {
> - struct drm_i915_private *i915 = __uc_fw_to_gt(uc_fw)->i915;
> + struct intel_gt *gt = __uc_fw_to_gt(uc_fw);
> + struct drm_i915_private *i915 = gt->i915;
> struct intel_uc_fw_file file_ideal;
> struct device *dev = i915->drm.dev;
> struct drm_i915_gem_object *obj;
> @@ -562,7 +564,7 @@ int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw)
> bool old_ver = false;
> int err;
>
> - GEM_BUG_ON(!i915->wopcm.size);
> + GEM_BUG_ON(!gt->wopcm.size);
> GEM_BUG_ON(!intel_uc_fw_is_enabled(uc_fw));
>
> err = i915_inject_probe_error(i915, -ENXIO);
> @@ -615,7 +617,7 @@ int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw)
> if (uc_fw->loaded_via_gsc)
> err = check_gsc_manifest(fw, uc_fw);
> else
> - err = check_ccs_header(i915, fw, uc_fw);
> + err = check_ccs_header(gt, fw, uc_fw);
> if (err)
> goto fail;
>
> diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
> index ffff49868dc5..ba4b71aedc40 100644
> --- a/drivers/gpu/drm/i915/i915_driver.c
> +++ b/drivers/gpu/drm/i915/i915_driver.c
> @@ -371,8 +371,6 @@ static int i915_driver_early_probe(struct drm_i915_private *dev_priv)
> if (ret)
> goto err_ttm;
>
> - intel_wopcm_init_early(&dev_priv->wopcm);
> -
> ret = intel_root_gt_init_early(dev_priv);
> if (ret < 0)
> goto err_rootgt;
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 9453fdd4205f..66aa2cd9aefe 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -62,7 +62,6 @@
> #include "intel_runtime_pm.h"
> #include "intel_step.h"
> #include "intel_uncore.h"
> -#include "intel_wopcm.h"
>
> struct drm_i915_clock_gating_funcs;
> struct drm_i915_gem_object;
> @@ -235,8 +234,6 @@ struct drm_i915_private {
>
> struct intel_gvt *gvt;
>
> - struct intel_wopcm wopcm;
> -
> struct pci_dev *bridge_dev;
>
> struct rb_root uabi_engines;
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index 9093d2be9e1c..7a9ce81600a0 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -1140,9 +1140,10 @@ int i915_gem_init(struct drm_i915_private *dev_priv)
> if (ret)
> return ret;
>
> - for_each_gt(gt, dev_priv, i)
> + for_each_gt(gt, dev_priv, i) {
> intel_uc_fetch_firmwares(>->uc);
> - intel_wopcm_init(&dev_priv->wopcm);
> + intel_wopcm_init(>->wopcm);
> + }
>
> ret = i915_init_ggtt(dev_priv);
> if (ret) {
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