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path: root/drivers/gpu/drm/i915/intel_wopcm.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_wopcm.c')
-rw-r--r--drivers/gpu/drm/i915/intel_wopcm.c281
1 files changed, 0 insertions, 281 deletions
diff --git a/drivers/gpu/drm/i915/intel_wopcm.c b/drivers/gpu/drm/i915/intel_wopcm.c
deleted file mode 100644
index 92cb82dd0c07..000000000000
--- a/drivers/gpu/drm/i915/intel_wopcm.c
+++ /dev/null
@@ -1,281 +0,0 @@
-/*
- * SPDX-License-Identifier: MIT
- *
- * Copyright © 2017-2018 Intel Corporation
- */
-
-#include "intel_wopcm.h"
-#include "i915_drv.h"
-
-/**
- * DOC: WOPCM Layout
- *
- * The layout of the WOPCM will be fixed after writing to GuC WOPCM size and
- * offset registers whose values are calculated and determined by HuC/GuC
- * firmware size and set of hardware requirements/restrictions as shown below:
- *
- * ::
- *
- * +=========> +====================+ <== WOPCM Top
- * ^ | HW contexts RSVD |
- * | +===> +====================+ <== GuC WOPCM Top
- * | ^ | |
- * | | | |
- * | | | |
- * | GuC | |
- * | WOPCM | |
- * | Size +--------------------+
- * WOPCM | | GuC FW RSVD |
- * | | +--------------------+
- * | | | GuC Stack RSVD |
- * | | +------------------- +
- * | v | GuC WOPCM RSVD |
- * | +===> +====================+ <== GuC WOPCM base
- * | | WOPCM RSVD |
- * | +------------------- + <== HuC Firmware Top
- * v | HuC FW |
- * +=========> +====================+ <== WOPCM Base
- *
- * GuC accessible WOPCM starts at GuC WOPCM base and ends at GuC WOPCM top.
- * The top part of the WOPCM is reserved for hardware contexts (e.g. RC6
- * context).
- */
-
-/* Default WOPCM size 1MB. */
-#define GEN9_WOPCM_SIZE (1024 * 1024)
-/* 16KB WOPCM (RSVD WOPCM) is reserved from HuC firmware top. */
-#define WOPCM_RESERVED_SIZE (16 * 1024)
-
-/* 16KB reserved at the beginning of GuC WOPCM. */
-#define GUC_WOPCM_RESERVED (16 * 1024)
-/* 8KB from GUC_WOPCM_RESERVED is reserved for GuC stack. */
-#define GUC_WOPCM_STACK_RESERVED (8 * 1024)
-
-/* GuC WOPCM Offset value needs to be aligned to 16KB. */
-#define GUC_WOPCM_OFFSET_ALIGNMENT (1UL << GUC_WOPCM_OFFSET_SHIFT)
-
-/* 24KB at the end of WOPCM is reserved for RC6 CTX on BXT. */
-#define BXT_WOPCM_RC6_CTX_RESERVED (24 * 1024)
-/* 36KB WOPCM reserved at the end of WOPCM on CNL. */
-#define CNL_WOPCM_HW_CTX_RESERVED (36 * 1024)
-
-/* 128KB from GUC_WOPCM_RESERVED is reserved for FW on Gen9. */
-#define GEN9_GUC_FW_RESERVED (128 * 1024)
-#define GEN9_GUC_WOPCM_OFFSET (GUC_WOPCM_RESERVED + GEN9_GUC_FW_RESERVED)
-
-/**
- * intel_wopcm_init_early() - Early initialization of the WOPCM.
- * @wopcm: pointer to intel_wopcm.
- *
- * Setup the size of WOPCM which will be used by later on WOPCM partitioning.
- */
-void intel_wopcm_init_early(struct intel_wopcm *wopcm)
-{
- wopcm->size = GEN9_WOPCM_SIZE;
-
- DRM_DEBUG_DRIVER("WOPCM size: %uKiB\n", wopcm->size / 1024);
-}
-
-static inline u32 context_reserved_size(struct drm_i915_private *i915)
-{
- if (IS_GEN9_LP(i915))
- return BXT_WOPCM_RC6_CTX_RESERVED;
- else if (INTEL_GEN(i915) >= 10)
- return CNL_WOPCM_HW_CTX_RESERVED;
- else
- return 0;
-}
-
-static inline int gen9_check_dword_gap(u32 guc_wopcm_base, u32 guc_wopcm_size)
-{
- u32 offset;
-
- /*
- * GuC WOPCM size shall be at least a dword larger than the offset from
- * WOPCM base (GuC WOPCM offset from WOPCM base + GEN9_GUC_WOPCM_OFFSET)
- * due to hardware limitation on Gen9.
- */
- offset = guc_wopcm_base + GEN9_GUC_WOPCM_OFFSET;
- if (offset > guc_wopcm_size ||
- (guc_wopcm_size - offset) < sizeof(u32)) {
- DRM_ERROR("GuC WOPCM size %uKiB is too small. %uKiB needed.\n",
- guc_wopcm_size / 1024,
- (u32)(offset + sizeof(u32)) / 1024);
- return -E2BIG;
- }
-
- return 0;
-}
-
-static inline int gen9_check_huc_fw_fits(u32 guc_wopcm_size, u32 huc_fw_size)
-{
- /*
- * On Gen9 & CNL A0, hardware requires the total available GuC WOPCM
- * size to be larger than or equal to HuC firmware size. Otherwise,
- * firmware uploading would fail.
- */
- if (huc_fw_size > guc_wopcm_size - GUC_WOPCM_RESERVED) {
- DRM_ERROR("HuC FW (%uKiB) won't fit in GuC WOPCM (%uKiB).\n",
- huc_fw_size / 1024,
- (guc_wopcm_size - GUC_WOPCM_RESERVED) / 1024);
- return -E2BIG;
- }
-
- return 0;
-}
-
-static inline int check_hw_restriction(struct drm_i915_private *i915,
- u32 guc_wopcm_base, u32 guc_wopcm_size,
- u32 huc_fw_size)
-{
- int err = 0;
-
- if (IS_GEN9(i915))
- err = gen9_check_dword_gap(guc_wopcm_base, guc_wopcm_size);
-
- if (!err &&
- (IS_GEN9(i915) || IS_CNL_REVID(i915, CNL_REVID_A0, CNL_REVID_A0)))
- err = gen9_check_huc_fw_fits(guc_wopcm_size, huc_fw_size);
-
- return err;
-}
-
-/**
- * intel_wopcm_init() - Initialize the WOPCM structure.
- * @wopcm: pointer to intel_wopcm.
- *
- * This function will partition WOPCM space based on GuC and HuC firmware sizes
- * and will allocate max remaining for use by GuC. This function will also
- * enforce platform dependent hardware restrictions on GuC WOPCM offset and
- * size. It will fail the WOPCM init if any of these checks were failed, so that
- * the following GuC firmware uploading would be aborted.
- *
- * Return: 0 on success, non-zero error code on failure.
- */
-int intel_wopcm_init(struct intel_wopcm *wopcm)
-{
- struct drm_i915_private *i915 = wopcm_to_i915(wopcm);
- u32 guc_fw_size = intel_uc_fw_get_upload_size(&i915->guc.fw);
- u32 huc_fw_size = intel_uc_fw_get_upload_size(&i915->huc.fw);
- u32 ctx_rsvd = context_reserved_size(i915);
- u32 guc_wopcm_base;
- u32 guc_wopcm_size;
- u32 guc_wopcm_rsvd;
- int err;
-
- if (!USES_GUC(dev_priv))
- return 0;
-
- GEM_BUG_ON(!wopcm->size);
-
- if (i915_inject_load_failure())
- return -E2BIG;
-
- if (guc_fw_size >= wopcm->size) {
- DRM_ERROR("GuC FW (%uKiB) is too big to fit in WOPCM.",
- guc_fw_size / 1024);
- return -E2BIG;
- }
-
- if (huc_fw_size >= wopcm->size) {
- DRM_ERROR("HuC FW (%uKiB) is too big to fit in WOPCM.",
- huc_fw_size / 1024);
- return -E2BIG;
- }
-
- guc_wopcm_base = ALIGN(huc_fw_size + WOPCM_RESERVED_SIZE,
- GUC_WOPCM_OFFSET_ALIGNMENT);
- if ((guc_wopcm_base + ctx_rsvd) >= wopcm->size) {
- DRM_ERROR("GuC WOPCM base (%uKiB) is too big.\n",
- guc_wopcm_base / 1024);
- return -E2BIG;
- }
-
- guc_wopcm_size = wopcm->size - guc_wopcm_base - ctx_rsvd;
- guc_wopcm_size &= GUC_WOPCM_SIZE_MASK;
-
- DRM_DEBUG_DRIVER("Calculated GuC WOPCM Region: [%uKiB, %uKiB)\n",
- guc_wopcm_base / 1024, guc_wopcm_size / 1024);
-
- guc_wopcm_rsvd = GUC_WOPCM_RESERVED + GUC_WOPCM_STACK_RESERVED;
- if ((guc_fw_size + guc_wopcm_rsvd) > guc_wopcm_size) {
- DRM_ERROR("Need %uKiB WOPCM for GuC, %uKiB available.\n",
- (guc_fw_size + guc_wopcm_rsvd) / 1024,
- guc_wopcm_size / 1024);
- return -E2BIG;
- }
-
- err = check_hw_restriction(i915, guc_wopcm_base, guc_wopcm_size,
- huc_fw_size);
- if (err)
- return err;
-
- wopcm->guc.base = guc_wopcm_base;
- wopcm->guc.size = guc_wopcm_size;
-
- return 0;
-}
-
-static inline int write_and_verify(struct drm_i915_private *dev_priv,
- i915_reg_t reg, u32 val, u32 mask,
- u32 locked_bit)
-{
- u32 reg_val;
-
- GEM_BUG_ON(val & ~mask);
-
- I915_WRITE(reg, val);
-
- reg_val = I915_READ(reg);
-
- return (reg_val & mask) != (val | locked_bit) ? -EIO : 0;
-}
-
-/**
- * intel_wopcm_init_hw() - Setup GuC WOPCM registers.
- * @wopcm: pointer to intel_wopcm.
- *
- * Setup the GuC WOPCM size and offset registers with the calculated values. It
- * will verify the register values to make sure the registers are locked with
- * correct values.
- *
- * Return: 0 on success. -EIO if registers were locked with incorrect values.
- */
-int intel_wopcm_init_hw(struct intel_wopcm *wopcm)
-{
- struct drm_i915_private *dev_priv = wopcm_to_i915(wopcm);
- u32 huc_agent;
- u32 mask;
- int err;
-
- if (!USES_GUC(dev_priv))
- return 0;
-
- GEM_BUG_ON(!HAS_GUC(dev_priv));
- GEM_BUG_ON(!wopcm->guc.size);
- GEM_BUG_ON(!wopcm->guc.base);
-
- err = write_and_verify(dev_priv, GUC_WOPCM_SIZE, wopcm->guc.size,
- GUC_WOPCM_SIZE_MASK | GUC_WOPCM_SIZE_LOCKED,
- GUC_WOPCM_SIZE_LOCKED);
- if (err)
- goto err_out;
-
- huc_agent = USES_HUC(dev_priv) ? HUC_LOADING_AGENT_GUC : 0;
- mask = GUC_WOPCM_OFFSET_MASK | GUC_WOPCM_OFFSET_VALID | huc_agent;
- err = write_and_verify(dev_priv, DMA_GUC_WOPCM_OFFSET,
- wopcm->guc.base | huc_agent, mask,
- GUC_WOPCM_OFFSET_VALID);
- if (err)
- goto err_out;
-
- return 0;
-
-err_out:
- DRM_ERROR("Failed to init WOPCM registers:\n");
- DRM_ERROR("DMA_GUC_WOPCM_OFFSET=%#x\n",
- I915_READ(DMA_GUC_WOPCM_OFFSET));
- DRM_ERROR("GUC_WOPCM_SIZE=%#x\n", I915_READ(GUC_WOPCM_SIZE));
-
- return err;
-}
generated by cgit (git 2.34.1) at 2025-12-25 01:35:56 +0000