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1// SPDX-License-Identifier: MIT2/*3 * Copyright 2023, Intel Corporation.4 */5 6#include "gem/i915_gem_internal.h"7#include "gem/i915_gem_lmem.h"8#include "i915_drv.h"9#include "i915_vma.h"10#include "intel_display_types.h"11#include "intel_dsb_buffer.h"12 13u32 intel_dsb_buffer_ggtt_offset(struct intel_dsb_buffer *dsb_buf)14{15 return i915_ggtt_offset(dsb_buf->vma);16}17 18void intel_dsb_buffer_write(struct intel_dsb_buffer *dsb_buf, u32 idx, u32 val)19{20 dsb_buf->cmd_buf[idx] = val;21}22 23u32 intel_dsb_buffer_read(struct intel_dsb_buffer *dsb_buf, u32 idx)24{25 return dsb_buf->cmd_buf[idx];26}27 28void intel_dsb_buffer_memset(struct intel_dsb_buffer *dsb_buf, u32 idx, u32 val, size_t size)29{30 WARN_ON(idx > (dsb_buf->buf_size - size) / sizeof(*dsb_buf->cmd_buf));31 32 memset(&dsb_buf->cmd_buf[idx], val, size);33}34 35bool intel_dsb_buffer_create(struct intel_crtc *crtc, struct intel_dsb_buffer *dsb_buf, size_t size)36{37 struct drm_i915_private *i915 = to_i915(crtc->base.dev);38 struct drm_i915_gem_object *obj;39 struct i915_vma *vma;40 u32 *buf;41 42 if (HAS_LMEM(i915)) {43 obj = i915_gem_object_create_lmem(i915, PAGE_ALIGN(size),44 I915_BO_ALLOC_CONTIGUOUS);45 if (IS_ERR(obj))46 return false;47 } else {48 obj = i915_gem_object_create_internal(i915, PAGE_ALIGN(size));49 if (IS_ERR(obj))50 return false;51 52 i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);53 }54 55 vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0);56 if (IS_ERR(vma)) {57 i915_gem_object_put(obj);58 return false;59 }60 61 buf = i915_gem_object_pin_map_unlocked(vma->obj, I915_MAP_WC);62 if (IS_ERR(buf)) {63 i915_vma_unpin_and_release(&vma, I915_VMA_RELEASE_MAP);64 return false;65 }66 67 dsb_buf->vma = vma;68 dsb_buf->cmd_buf = buf;69 dsb_buf->buf_size = size;70 71 return true;72}73 74void intel_dsb_buffer_cleanup(struct intel_dsb_buffer *dsb_buf)75{76 i915_vma_unpin_and_release(&dsb_buf->vma, I915_VMA_RELEASE_MAP);77}78 79void intel_dsb_buffer_flush_map(struct intel_dsb_buffer *dsb_buf)80{81 i915_gem_object_flush_map(dsb_buf->vma->obj);82}83