83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright 2023, Intel Corporation.
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*/
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#include "gem/i915_gem_internal.h"
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#include "gem/i915_gem_lmem.h"
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#include "i915_drv.h"
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#include "i915_vma.h"
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#include "intel_display_types.h"
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#include "intel_dsb_buffer.h"
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u32 intel_dsb_buffer_ggtt_offset(struct intel_dsb_buffer *dsb_buf)
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{
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return i915_ggtt_offset(dsb_buf->vma);
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}
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void intel_dsb_buffer_write(struct intel_dsb_buffer *dsb_buf, u32 idx, u32 val)
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{
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dsb_buf->cmd_buf[idx] = val;
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}
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u32 intel_dsb_buffer_read(struct intel_dsb_buffer *dsb_buf, u32 idx)
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{
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return dsb_buf->cmd_buf[idx];
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}
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void intel_dsb_buffer_memset(struct intel_dsb_buffer *dsb_buf, u32 idx, u32 val, size_t size)
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{
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WARN_ON(idx > (dsb_buf->buf_size - size) / sizeof(*dsb_buf->cmd_buf));
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memset(&dsb_buf->cmd_buf[idx], val, size);
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}
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bool intel_dsb_buffer_create(struct intel_crtc *crtc, struct intel_dsb_buffer *dsb_buf, size_t size)
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{
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struct drm_i915_private *i915 = to_i915(crtc->base.dev);
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struct drm_i915_gem_object *obj;
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struct i915_vma *vma;
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u32 *buf;
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if (HAS_LMEM(i915)) {
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obj = i915_gem_object_create_lmem(i915, PAGE_ALIGN(size),
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I915_BO_ALLOC_CONTIGUOUS);
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if (IS_ERR(obj))
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return false;
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} else {
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obj = i915_gem_object_create_internal(i915, PAGE_ALIGN(size));
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if (IS_ERR(obj))
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return false;
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i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);
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}
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vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0);
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if (IS_ERR(vma)) {
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i915_gem_object_put(obj);
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return false;
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}
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buf = i915_gem_object_pin_map_unlocked(vma->obj, I915_MAP_WC);
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if (IS_ERR(buf)) {
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i915_vma_unpin_and_release(&vma, I915_VMA_RELEASE_MAP);
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return false;
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}
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dsb_buf->vma = vma;
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dsb_buf->cmd_buf = buf;
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dsb_buf->buf_size = size;
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return true;
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}
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void intel_dsb_buffer_cleanup(struct intel_dsb_buffer *dsb_buf)
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{
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i915_vma_unpin_and_release(&dsb_buf->vma, I915_VMA_RELEASE_MAP);
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}
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void intel_dsb_buffer_flush_map(struct intel_dsb_buffer *dsb_buf)
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{
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i915_gem_object_flush_map(dsb_buf->vma->obj);
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}
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