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![Daniele Ceraolo Spurio](/assets/img/avatar_default.png)
The size has been increased to 2MB starting from Gen11. GuC and HuC FWs fit in 1MB so we were fine even with the legacy define, but let's still move to the correct one before the blobs grow to avoid being caught off guard in the future. v2: return early if the platform doesn't have GuC, fix nits (Michal) Bspec: 12690 Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Michal Wajdeczko <michal.wajdeczko@intel.com> Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com> Reviewed-by: Stuart Summers <stuart.summers@intel.com> [ickle: use SZ consistently] Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20190606224225.14287-2-daniele.ceraolospurio@intel.com
290 lines
8.3 KiB
C
290 lines
8.3 KiB
C
/*
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* SPDX-License-Identifier: MIT
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*
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* Copyright © 2017-2018 Intel Corporation
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*/
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#include "intel_wopcm.h"
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#include "i915_drv.h"
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/**
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* DOC: WOPCM Layout
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*
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* The layout of the WOPCM will be fixed after writing to GuC WOPCM size and
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* offset registers whose values are calculated and determined by HuC/GuC
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* firmware size and set of hardware requirements/restrictions as shown below:
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*
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* ::
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*
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* +=========> +====================+ <== WOPCM Top
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* ^ | HW contexts RSVD |
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* | +===> +====================+ <== GuC WOPCM Top
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* | ^ | |
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* | | | |
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* | | | |
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* | GuC | |
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* | WOPCM | |
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* | Size +--------------------+
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* WOPCM | | GuC FW RSVD |
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* | | +--------------------+
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* | | | GuC Stack RSVD |
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* | | +------------------- +
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* | v | GuC WOPCM RSVD |
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* | +===> +====================+ <== GuC WOPCM base
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* | | WOPCM RSVD |
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* | +------------------- + <== HuC Firmware Top
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* v | HuC FW |
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* +=========> +====================+ <== WOPCM Base
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*
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* GuC accessible WOPCM starts at GuC WOPCM base and ends at GuC WOPCM top.
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* The top part of the WOPCM is reserved for hardware contexts (e.g. RC6
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* context).
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*/
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/* Default WOPCM size is 2MB from Gen11, 1MB on previous platforms */
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#define GEN11_WOPCM_SIZE SZ_2M
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#define GEN9_WOPCM_SIZE SZ_1M
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/* 16KB WOPCM (RSVD WOPCM) is reserved from HuC firmware top. */
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#define WOPCM_RESERVED_SIZE SZ_16K
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/* 16KB reserved at the beginning of GuC WOPCM. */
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#define GUC_WOPCM_RESERVED SZ_16K
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/* 8KB from GUC_WOPCM_RESERVED is reserved for GuC stack. */
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#define GUC_WOPCM_STACK_RESERVED SZ_8K
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/* GuC WOPCM Offset value needs to be aligned to 16KB. */
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#define GUC_WOPCM_OFFSET_ALIGNMENT (1UL << GUC_WOPCM_OFFSET_SHIFT)
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/* 24KB at the end of WOPCM is reserved for RC6 CTX on BXT. */
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#define BXT_WOPCM_RC6_CTX_RESERVED (SZ_16K + SZ_8K)
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/* 36KB WOPCM reserved at the end of WOPCM on CNL. */
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#define CNL_WOPCM_HW_CTX_RESERVED (SZ_32K + SZ_4K)
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/* 128KB from GUC_WOPCM_RESERVED is reserved for FW on Gen9. */
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#define GEN9_GUC_FW_RESERVED SZ_128K
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#define GEN9_GUC_WOPCM_OFFSET (GUC_WOPCM_RESERVED + GEN9_GUC_FW_RESERVED)
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/**
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* intel_wopcm_init_early() - Early initialization of the WOPCM.
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* @wopcm: pointer to intel_wopcm.
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*
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* Setup the size of WOPCM which will be used by later on WOPCM partitioning.
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*/
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void intel_wopcm_init_early(struct intel_wopcm *wopcm)
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{
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struct drm_i915_private *i915 = wopcm_to_i915(wopcm);
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if (!HAS_GUC(i915))
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return;
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if (INTEL_GEN(i915) >= 11)
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wopcm->size = GEN11_WOPCM_SIZE;
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else
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wopcm->size = GEN9_WOPCM_SIZE;
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DRM_DEBUG_DRIVER("WOPCM size: %uKiB\n", wopcm->size / 1024);
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}
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static inline u32 context_reserved_size(struct drm_i915_private *i915)
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{
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if (IS_GEN9_LP(i915))
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return BXT_WOPCM_RC6_CTX_RESERVED;
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else if (INTEL_GEN(i915) >= 10)
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return CNL_WOPCM_HW_CTX_RESERVED;
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else
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return 0;
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}
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static inline int gen9_check_dword_gap(u32 guc_wopcm_base, u32 guc_wopcm_size)
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{
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u32 offset;
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/*
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* GuC WOPCM size shall be at least a dword larger than the offset from
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* WOPCM base (GuC WOPCM offset from WOPCM base + GEN9_GUC_WOPCM_OFFSET)
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* due to hardware limitation on Gen9.
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*/
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offset = guc_wopcm_base + GEN9_GUC_WOPCM_OFFSET;
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if (offset > guc_wopcm_size ||
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(guc_wopcm_size - offset) < sizeof(u32)) {
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DRM_ERROR("GuC WOPCM size %uKiB is too small. %uKiB needed.\n",
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guc_wopcm_size / 1024,
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(u32)(offset + sizeof(u32)) / 1024);
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return -E2BIG;
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}
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return 0;
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}
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static inline int gen9_check_huc_fw_fits(u32 guc_wopcm_size, u32 huc_fw_size)
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{
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/*
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* On Gen9 & CNL A0, hardware requires the total available GuC WOPCM
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* size to be larger than or equal to HuC firmware size. Otherwise,
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* firmware uploading would fail.
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*/
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if (huc_fw_size > guc_wopcm_size - GUC_WOPCM_RESERVED) {
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DRM_ERROR("HuC FW (%uKiB) won't fit in GuC WOPCM (%uKiB).\n",
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huc_fw_size / 1024,
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(guc_wopcm_size - GUC_WOPCM_RESERVED) / 1024);
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return -E2BIG;
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}
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return 0;
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}
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static inline int check_hw_restriction(struct drm_i915_private *i915,
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u32 guc_wopcm_base, u32 guc_wopcm_size,
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u32 huc_fw_size)
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{
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int err = 0;
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if (IS_GEN(i915, 9))
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err = gen9_check_dword_gap(guc_wopcm_base, guc_wopcm_size);
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if (!err &&
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(IS_GEN(i915, 9) || IS_CNL_REVID(i915, CNL_REVID_A0, CNL_REVID_A0)))
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err = gen9_check_huc_fw_fits(guc_wopcm_size, huc_fw_size);
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return err;
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}
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/**
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* intel_wopcm_init() - Initialize the WOPCM structure.
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* @wopcm: pointer to intel_wopcm.
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*
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* This function will partition WOPCM space based on GuC and HuC firmware sizes
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* and will allocate max remaining for use by GuC. This function will also
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* enforce platform dependent hardware restrictions on GuC WOPCM offset and
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* size. It will fail the WOPCM init if any of these checks were failed, so that
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* the following GuC firmware uploading would be aborted.
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*
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* Return: 0 on success, non-zero error code on failure.
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*/
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int intel_wopcm_init(struct intel_wopcm *wopcm)
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{
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struct drm_i915_private *i915 = wopcm_to_i915(wopcm);
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u32 guc_fw_size = intel_uc_fw_get_upload_size(&i915->guc.fw);
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u32 huc_fw_size = intel_uc_fw_get_upload_size(&i915->huc.fw);
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u32 ctx_rsvd = context_reserved_size(i915);
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u32 guc_wopcm_base;
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u32 guc_wopcm_size;
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u32 guc_wopcm_rsvd;
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int err;
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if (!USES_GUC(i915))
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return 0;
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GEM_BUG_ON(!wopcm->size);
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if (i915_inject_load_failure())
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return -E2BIG;
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if (guc_fw_size >= wopcm->size) {
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DRM_ERROR("GuC FW (%uKiB) is too big to fit in WOPCM.",
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guc_fw_size / 1024);
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return -E2BIG;
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}
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if (huc_fw_size >= wopcm->size) {
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DRM_ERROR("HuC FW (%uKiB) is too big to fit in WOPCM.",
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huc_fw_size / 1024);
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return -E2BIG;
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}
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guc_wopcm_base = ALIGN(huc_fw_size + WOPCM_RESERVED_SIZE,
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GUC_WOPCM_OFFSET_ALIGNMENT);
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if ((guc_wopcm_base + ctx_rsvd) >= wopcm->size) {
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DRM_ERROR("GuC WOPCM base (%uKiB) is too big.\n",
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guc_wopcm_base / 1024);
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return -E2BIG;
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}
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guc_wopcm_size = wopcm->size - guc_wopcm_base - ctx_rsvd;
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guc_wopcm_size &= GUC_WOPCM_SIZE_MASK;
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DRM_DEBUG_DRIVER("Calculated GuC WOPCM Region: [%uKiB, %uKiB)\n",
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guc_wopcm_base / 1024, guc_wopcm_size / 1024);
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guc_wopcm_rsvd = GUC_WOPCM_RESERVED + GUC_WOPCM_STACK_RESERVED;
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if ((guc_fw_size + guc_wopcm_rsvd) > guc_wopcm_size) {
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DRM_ERROR("Need %uKiB WOPCM for GuC, %uKiB available.\n",
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(guc_fw_size + guc_wopcm_rsvd) / 1024,
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guc_wopcm_size / 1024);
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return -E2BIG;
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}
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err = check_hw_restriction(i915, guc_wopcm_base, guc_wopcm_size,
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huc_fw_size);
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if (err)
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return err;
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wopcm->guc.base = guc_wopcm_base;
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wopcm->guc.size = guc_wopcm_size;
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return 0;
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}
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static inline int write_and_verify(struct drm_i915_private *dev_priv,
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i915_reg_t reg, u32 val, u32 mask,
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u32 locked_bit)
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{
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u32 reg_val;
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GEM_BUG_ON(val & ~mask);
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I915_WRITE(reg, val);
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reg_val = I915_READ(reg);
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return (reg_val & mask) != (val | locked_bit) ? -EIO : 0;
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}
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/**
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* intel_wopcm_init_hw() - Setup GuC WOPCM registers.
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* @wopcm: pointer to intel_wopcm.
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*
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* Setup the GuC WOPCM size and offset registers with the calculated values. It
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* will verify the register values to make sure the registers are locked with
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* correct values.
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*
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* Return: 0 on success. -EIO if registers were locked with incorrect values.
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*/
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int intel_wopcm_init_hw(struct intel_wopcm *wopcm)
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{
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struct drm_i915_private *dev_priv = wopcm_to_i915(wopcm);
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u32 huc_agent;
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u32 mask;
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int err;
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if (!USES_GUC(dev_priv))
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return 0;
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GEM_BUG_ON(!HAS_GUC(dev_priv));
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GEM_BUG_ON(!wopcm->guc.size);
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GEM_BUG_ON(!wopcm->guc.base);
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err = write_and_verify(dev_priv, GUC_WOPCM_SIZE, wopcm->guc.size,
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GUC_WOPCM_SIZE_MASK | GUC_WOPCM_SIZE_LOCKED,
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GUC_WOPCM_SIZE_LOCKED);
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if (err)
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goto err_out;
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huc_agent = USES_HUC(dev_priv) ? HUC_LOADING_AGENT_GUC : 0;
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mask = GUC_WOPCM_OFFSET_MASK | GUC_WOPCM_OFFSET_VALID | huc_agent;
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err = write_and_verify(dev_priv, DMA_GUC_WOPCM_OFFSET,
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wopcm->guc.base | huc_agent, mask,
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GUC_WOPCM_OFFSET_VALID);
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if (err)
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goto err_out;
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return 0;
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err_out:
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DRM_ERROR("Failed to init WOPCM registers:\n");
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DRM_ERROR("DMA_GUC_WOPCM_OFFSET=%#x\n",
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I915_READ(DMA_GUC_WOPCM_OFFSET));
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DRM_ERROR("GUC_WOPCM_SIZE=%#x\n", I915_READ(GUC_WOPCM_SIZE));
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return err;
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}
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