Initial commit.
Thomas Hellstrom
parent
40c9e6a26d
commit
28d4d02d67
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@ -0,0 +1,653 @@
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/*
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* Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include "drmP.h"
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#include "drm.h"
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#include "i915_drm.h"
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#include "i915_drv.h"
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struct i915_relocatee_info {
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struct drm_buffer_object *buf;
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unsigned long offset;
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uint32_t *data_page;
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unsigned page_offset;
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struct drm_bo_kmap_obj kmap;
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int is_iomem;
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int idle;
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int dst;
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#ifdef DRM_KMAP_ATOMIC_PROT_PFN
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unsigned long pfn;
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pgprot_t pg_prot;
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#endif
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};
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struct drm_i915_validate_buffer {
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struct drm_buffer_object *buffer;
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struct drm_bo_info_rep rep;
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int presumed_offset_correct;
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void __user *data;
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int ret;
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};
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static int i915_update_relocatee(struct i915_relocatee_info *relocatee,
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struct drm_i915_validate_buffer *buffers,
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unsigned int dst,
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unsigned long dst_offset)
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{
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int ret;
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if (unlikely(dst != relocatee->dst || NULL == relocatee->buf)) {
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i915_clear_relocatee(relocatee);
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relocatee->dst = dst;
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relocatee->buf = buffers[dst].buffer;
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preempt_enable();
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ret = mutex_lock_interruptible(&relocatee->buf->mutex);
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preempt_disable();
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if (unlikely(ret))
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return -EAGAIN;
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ret = drm_bo_wait(relocatee->buf, 0, 0, 0);
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if (unlikely(ret))
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return ret;
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mutex_unlock(&relocatee->buf->mutex);
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}
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if (unlikely(dst_offset > relocatee->buf->num_pages * PAGE_SIZE)) {
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DRM_ERROR("Relocation destination out of bounds.\n");
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return -EINVAL;
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}
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if (unlikely(!drm_bo_same_page(relocatee->page_offset, dst_offset) ||
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NULL == relocatee->data_page)) {
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#ifdef DRM_KMAP_ATOMIC_PROT_PFN
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if (NULL != relocatee->data_page) {
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kunmap_atomic(relocatee->data_page, KM_USER0);
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relocatee->data_page = NULL;
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}
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ret = drm_bo_pfn_prot(relocatee->buf, dst_offset,
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&relocatee->pfn,
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&relocatee->pg_prot);
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if (ret) {
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DRM_ERROR("Can't map relocation destination.\n");
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return -EINVAL;
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}
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relocatee->data_page =
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kmap_atomic_prot_pfn(relocatee->pfn, KM_USER0,
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relocatee->pg_prot);
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#else
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if (NULL != relocatee->data_page) {
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drm_bo_kunmap(&relocatee->kmap);
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relocatee->data_page = NULL;
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}
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ret = drm_bo_kmap(relocatee->buf, dst_offset >> PAGE_SHIFT,
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1, &relocatee->kmap);
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if (ret) {
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DRM_ERROR("Can't map relocation destination.\n");
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return ret;
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}
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relocatee->data_page = drm_bmo_virtual(&relocatee->kmap,
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&relocatee->is_iomem);
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#endif
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relocatee->page_offset = dst_offset & PAGE_MASK;
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}
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return 0;
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}
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static void i915_dereference_buffers_locked(struct drm_i915_validate_buffer *buffers,
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unsigned num_buffers)
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{
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while (num_buffers--)
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drm_bo_usage_deref_locked(&buffers[num_buffers].buffer);
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}
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int i915_apply_reloc(struct drm_file *file_priv, int num_buffers,
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struct drm_i915_validate_buffer *buffers,
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struct i915_relocatee_info *relocatee,
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uint32_t *reloc)
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{
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unsigned index;
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unsigned long new_cmd_offset;
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u32 val;
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int ret, i;
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int buf_index = -1;
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/*
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* FIXME: O(relocs * buffers) complexity.
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*/
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for (i = 0; i <= num_buffers; i++)
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if (buffers[i].buffer)
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if (reloc[2] == buffers[i].buffer->base.hash.key)
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buf_index = i;
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if (buf_index == -1) {
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DRM_ERROR("Illegal relocation buffer %08X\n", reloc[2]);
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return -EINVAL;
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}
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/*
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* Short-circuit relocations that were correctly
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* guessed by the client
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*/
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if (buffers[buf_index].presumed_offset_correct && !DRM_DEBUG_RELOCATION)
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return 0;
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new_cmd_offset = reloc[0];
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if (!relocatee->data_page ||
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!drm_bo_same_page(relocatee->offset, new_cmd_offset)) {
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drm_bo_kunmap(&relocatee->kmap);
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relocatee->data_page = NULL;
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relocatee->offset = new_cmd_offset;
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/*
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* Note on buffer idle:
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* Since we're applying relocations, this part of the
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* buffer is obviously not used by the GPU and we don't
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* need to wait for buffer idle. This is an important
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* consideration for user-space buffer pools.
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*/
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ret = drm_bo_kmap(relocatee->buf, new_cmd_offset >> PAGE_SHIFT,
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1, &relocatee->kmap);
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if (ret) {
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DRM_ERROR("Could not map command buffer to apply relocs\n %08lx", new_cmd_offset);
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return ret;
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}
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relocatee->data_page = drm_bmo_virtual(&relocatee->kmap,
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&relocatee->is_iomem);
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relocatee->page_offset = (relocatee->offset & PAGE_MASK);
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}
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val = buffers[buf_index].buffer->offset;
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index = (reloc[0] - relocatee->page_offset) >> 2;
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/* add in validate */
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val = val + reloc[1];
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if (DRM_DEBUG_RELOCATION) {
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if (buffers[buf_index].presumed_offset_correct &&
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relocatee->data_page[index] != val) {
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DRM_DEBUG ("Relocation mismatch source %d target %d buffer %d user %08x kernel %08x\n",
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reloc[0], reloc[1], buf_index, relocatee->data_page[index], val);
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}
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}
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if (relocatee->is_iomem)
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iowrite32(val, relocatee->data_page + index);
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else
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relocatee->data_page[index] = val;
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return 0;
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}
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int i915_process_relocs(struct drm_file *file_priv,
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uint32_t buf_handle,
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uint32_t __user **reloc_user_ptr,
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struct i915_relocatee_info *relocatee,
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struct drm_i915_validate_buffer *buffers,
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uint32_t num_buffers)
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{
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int ret, reloc_stride;
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uint32_t cur_offset;
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uint32_t reloc_count;
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uint32_t reloc_type;
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uint32_t reloc_buf_size;
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uint32_t *reloc_buf = NULL;
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int i;
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/* do a copy from user from the user ptr */
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ret = get_user(reloc_count, *reloc_user_ptr);
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if (ret) {
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DRM_ERROR("Could not map relocation buffer.\n");
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goto out;
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}
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ret = get_user(reloc_type, (*reloc_user_ptr)+1);
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if (ret) {
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DRM_ERROR("Could not map relocation buffer.\n");
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goto out;
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}
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if (reloc_type != 0) {
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DRM_ERROR("Unsupported relocation type requested\n");
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ret = -EINVAL;
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goto out;
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}
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reloc_buf_size = (I915_RELOC_HEADER + (reloc_count * I915_RELOC0_STRIDE)) * sizeof(uint32_t);
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reloc_buf = kmalloc(reloc_buf_size, GFP_KERNEL);
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if (!reloc_buf) {
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DRM_ERROR("Out of memory for reloc buffer\n");
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ret = -ENOMEM;
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goto out;
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}
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if (copy_from_user(reloc_buf, *reloc_user_ptr, reloc_buf_size)) {
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ret = -EFAULT;
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goto out;
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}
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/* get next relocate buffer handle */
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*reloc_user_ptr = (uint32_t *)*(unsigned long *)&reloc_buf[2];
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reloc_stride = I915_RELOC0_STRIDE * sizeof(uint32_t); /* may be different for other types of relocs */
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DRM_DEBUG("num relocs is %d, next is %p\n", reloc_count, *reloc_user_ptr);
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for (i = 0; i < reloc_count; i++) {
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cur_offset = I915_RELOC_HEADER + (i * I915_RELOC0_STRIDE);
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ret = i915_apply_reloc(file_priv, num_buffers, buffers,
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relocatee, reloc_buf + cur_offset);
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if (ret)
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goto out;
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}
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out:
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if (reloc_buf)
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kfree(reloc_buf);
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if (relocatee->data_page) {
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drm_bo_kunmap(&relocatee->kmap);
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relocatee->data_page = NULL;
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}
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return ret;
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}
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static int i915_exec_reloc(struct drm_file *file_priv, drm_handle_t buf_handle,
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uint32_t __user *reloc_user_ptr,
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struct drm_i915_validate_buffer *buffers,
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uint32_t buf_count)
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{
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struct drm_device *dev = file_priv->head->dev;
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struct i915_relocatee_info relocatee;
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int ret = 0;
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int b;
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/*
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* Short circuit relocations when all previous
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* buffers offsets were correctly guessed by
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* the client
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*/
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if (!DRM_DEBUG_RELOCATION) {
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for (b = 0; b < buf_count; b++)
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if (!buffers[b].presumed_offset_correct)
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break;
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if (b == buf_count)
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return 0;
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}
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memset(&relocatee, 0, sizeof(relocatee));
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mutex_lock(&dev->struct_mutex);
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relocatee.buf = drm_lookup_buffer_object(file_priv, buf_handle, 1);
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mutex_unlock(&dev->struct_mutex);
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if (!relocatee.buf) {
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DRM_DEBUG("relocatee buffer invalid %08x\n", buf_handle);
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ret = -EINVAL;
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goto out_err;
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}
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mutex_lock (&relocatee.buf->mutex);
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while (reloc_user_ptr) {
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ret = i915_process_relocs(file_priv, buf_handle, &reloc_user_ptr, &relocatee, buffers, buf_count);
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if (ret) {
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DRM_ERROR("process relocs failed\n");
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goto out_err1;
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}
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}
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out_err1:
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mutex_unlock (&relocatee.buf->mutex);
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drm_bo_usage_deref_unlocked(&relocatee.buf);
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out_err:
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return ret;
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}
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static int i915_check_presumed(struct drm_i915_op_arg *arg,
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struct drm_buffer_object *bo,
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uint32_t __user *data,
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int *presumed_ok)
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{
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struct drm_bo_op_req *req = &arg->d.req;
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uint32_t hint_offset;
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uint32_t hint = req->bo_req.hint;
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*presumed_ok = 0;
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if (!(hint & DRM_BO_HINT_PRESUMED_OFFSET))
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return 0;
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if (bo->offset == req->bo_req.presumed_offset) {
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*presumed_ok = 1;
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return 0;
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}
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/*
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* We need to turn off the HINT_PRESUMED_OFFSET for this buffer in
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* the user-space IOCTL argument list, since the buffer has moved,
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* we're about to apply relocations and we might subsequently
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* hit an -EAGAIN. In that case the argument list will be reused by
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* user-space, but the presumed offset is no longer valid.
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*
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* Needless to say, this is a bit ugly.
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*/
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hint_offset = (uint32_t *)&req->bo_req.hint - (uint32_t *)arg;
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hint &= ~DRM_BO_HINT_PRESUMED_OFFSET;
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return __put_user(hint, data + hint_offset);
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}
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/*
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||||
* Validate, add fence and relocate a block of bos from a userspace list
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||||
*/
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||||
int i915_validate_buffer_list(struct drm_file *file_priv,
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unsigned int fence_class, uint64_t data,
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struct drm_i915_validate_buffer *buffers,
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||||
uint32_t *num_buffers)
|
||||
{
|
||||
struct drm_i915_op_arg arg;
|
||||
struct drm_bo_op_req *req = &arg.d.req;
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||||
int ret = 0;
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||||
unsigned buf_count = 0;
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||||
uint32_t buf_handle;
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uint32_t __user *reloc_user_ptr;
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||||
struct drm_i915_validate_buffer *item = buffers;
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||||
|
||||
do {
|
||||
if (buf_count >= *num_buffers) {
|
||||
DRM_ERROR("Buffer count exceeded %d\n.", *num_buffers);
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||||
ret = -EINVAL;
|
||||
goto out_err;
|
||||
}
|
||||
item = buffers + buf_count;
|
||||
item->buffer = NULL;
|
||||
item->presumed_offset_correct = 0;
|
||||
|
||||
buffers[buf_count].buffer = NULL;
|
||||
|
||||
if (copy_from_user(&arg, (void __user *)(unsigned long)data, sizeof(arg))) {
|
||||
ret = -EFAULT;
|
||||
goto out_err;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
if (req->op != drm_bo_validate) {
|
||||
DRM_ERROR
|
||||
("Buffer object operation wasn't \"validate\".\n");
|
||||
ret = -EINVAL;
|
||||
goto out_err;
|
||||
}
|
||||
item->ret = 0;
|
||||
item->data = (void __user *) (unsigned long) data;
|
||||
|
||||
buf_handle = req->bo_req.handle;
|
||||
reloc_user_ptr = (uint32_t *)(unsigned long)arg.reloc_ptr;
|
||||
|
||||
if (reloc_user_ptr) {
|
||||
ret = i915_exec_reloc(file_priv, buf_handle, reloc_user_ptr, buffers, buf_count);
|
||||
if (ret)
|
||||
goto out_err;
|
||||
DRM_MEMORYBARRIER();
|
||||
}
|
||||
|
||||
ret = drm_bo_handle_validate(file_priv, req->bo_req.handle,
|
||||
req->bo_req.flags, req->bo_req.mask,
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||||
req->bo_req.hint,
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||||
req->bo_req.fence_class, 0,
|
||||
&item->rep,
|
||||
&item->buffer);
|
||||
|
||||
if (ret) {
|
||||
DRM_ERROR("error on handle validate %d\n", ret);
|
||||
goto out_err;
|
||||
}
|
||||
|
||||
buf_count++;
|
||||
|
||||
ret = i915_check_presumed(&arg, item->buffer,
|
||||
(uint32_t __user *)
|
||||
(unsigned long) data,
|
||||
&item->presumed_offset_correct);
|
||||
if (ret)
|
||||
goto out_err;
|
||||
|
||||
data = arg.next;
|
||||
} while (data != 0);
|
||||
out_err:
|
||||
*num_buffers = buf_count;
|
||||
item->ret = (ret != -EAGAIN) ? ret : 0;
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Remove all buffers from the unfenced list.
|
||||
* If the execbuffer operation was aborted, for example due to a signal,
|
||||
* this also make sure that buffers retain their original state and
|
||||
* fence pointers.
|
||||
* Copy back buffer information to user-space unless we were interrupted
|
||||
* by a signal. In which case the IOCTL must be rerun.
|
||||
*/
|
||||
|
||||
static int i915_handle_copyback(struct drm_device *dev,
|
||||
struct drm_i915_validate_buffer *buffers,
|
||||
unsigned int num_buffers, int ret)
|
||||
{
|
||||
int err = ret;
|
||||
int i;
|
||||
struct drm_i915_op_arg arg;
|
||||
|
||||
if (ret)
|
||||
drm_putback_buffer_objects(dev);
|
||||
|
||||
if (ret != -EAGAIN) {
|
||||
for (i = 0; i < num_buffers; ++i) {
|
||||
arg.handled = 1;
|
||||
arg.d.rep.ret = buffers->ret;
|
||||
arg.d.rep.bo_info = buffers->rep;
|
||||
if (__copy_to_user(buffers->data, &arg, sizeof(arg)))
|
||||
err = -EFAULT;
|
||||
buffers++;
|
||||
}
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
/*
|
||||
* Create a fence object, and if that fails, pretend that everything is
|
||||
* OK and just idle the GPU.
|
||||
*/
|
||||
|
||||
void i915_fence_or_sync(struct drm_file *file_priv,
|
||||
uint32_t fence_flags,
|
||||
struct drm_fence_arg *fence_arg,
|
||||
struct drm_fence_object **fence_p)
|
||||
{
|
||||
struct drm_device *dev = file_priv->head->dev;
|
||||
int ret;
|
||||
struct drm_fence_object *fence;
|
||||
|
||||
ret = drm_fence_buffer_objects(dev, NULL, fence_flags,
|
||||
NULL, &fence);
|
||||
|
||||
if (ret) {
|
||||
|
||||
/*
|
||||
* Fence creation failed.
|
||||
* Fall back to synchronous operation and idle the engine.
|
||||
*/
|
||||
|
||||
(void) i915_emit_mi_flush(dev, MI_READ_FLUSH);
|
||||
(void) i915_quiescent(dev);
|
||||
|
||||
if (!(fence_flags & DRM_FENCE_FLAG_NO_USER)) {
|
||||
|
||||
/*
|
||||
* Communicate to user-space that
|
||||
* fence creation has failed and that
|
||||
* the engine is idle.
|
||||
*/
|
||||
|
||||
fence_arg->handle = ~0;
|
||||
fence_arg->error = ret;
|
||||
}
|
||||
|
||||
drm_putback_buffer_objects(dev);
|
||||
if (fence_p)
|
||||
*fence_p = NULL;
|
||||
return;
|
||||
}
|
||||
|
||||
if (!(fence_flags & DRM_FENCE_FLAG_NO_USER)) {
|
||||
|
||||
ret = drm_fence_add_user_object(file_priv, fence,
|
||||
fence_flags &
|
||||
DRM_FENCE_FLAG_SHAREABLE);
|
||||
if (!ret)
|
||||
drm_fence_fill_arg(fence, fence_arg);
|
||||
else {
|
||||
/*
|
||||
* Fence user object creation failed.
|
||||
* We must idle the engine here as well, as user-
|
||||
* space expects a fence object to wait on. Since we
|
||||
* have a fence object we wait for it to signal
|
||||
* to indicate engine "sufficiently" idle.
|
||||
*/
|
||||
|
||||
(void) drm_fence_object_wait(fence, 0, 1,
|
||||
fence->type);
|
||||
drm_fence_usage_deref_unlocked(&fence);
|
||||
fence_arg->handle = ~0;
|
||||
fence_arg->error = ret;
|
||||
}
|
||||
}
|
||||
|
||||
if (fence_p)
|
||||
*fence_p = fence;
|
||||
else if (fence)
|
||||
drm_fence_usage_deref_unlocked(&fence);
|
||||
}
|
||||
|
||||
|
||||
static int i915_execbuffer(struct drm_device *dev, void *data,
|
||||
struct drm_file *file_priv)
|
||||
{
|
||||
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
||||
drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
|
||||
dev_priv->sarea_priv;
|
||||
struct drm_i915_execbuffer *exec_buf = data;
|
||||
struct drm_i915_batchbuffer *batch = &exec_buf->batch;
|
||||
struct drm_fence_arg *fence_arg = &exec_buf->fence_arg;
|
||||
int num_buffers;
|
||||
int ret;
|
||||
struct drm_i915_validate_buffer *buffers;
|
||||
|
||||
if (!dev_priv->allow_batchbuffer) {
|
||||
DRM_ERROR("Batchbuffer ioctl disabled\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
|
||||
if (batch->num_cliprects && DRM_VERIFYAREA_READ(batch->cliprects,
|
||||
batch->num_cliprects *
|
||||
sizeof(struct drm_clip_rect)))
|
||||
return -EFAULT;
|
||||
|
||||
if (exec_buf->num_buffers > dev_priv->max_validate_buffers)
|
||||
return -EINVAL;
|
||||
|
||||
|
||||
ret = drm_bo_read_lock(&dev->bm.bm_lock);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/*
|
||||
* The cmdbuf_mutex makes sure the validate-submit-fence
|
||||
* operation is atomic.
|
||||
*/
|
||||
|
||||
ret = mutex_lock_interruptible(&dev_priv->cmdbuf_mutex);
|
||||
if (ret) {
|
||||
drm_bo_read_unlock(&dev->bm.bm_lock);
|
||||
return -EAGAIN;
|
||||
}
|
||||
|
||||
num_buffers = exec_buf->num_buffers;
|
||||
|
||||
buffers = drm_calloc(num_buffers, sizeof(struct drm_i915_validate_buffer), DRM_MEM_DRIVER);
|
||||
if (!buffers) {
|
||||
drm_bo_read_unlock(&dev->bm.bm_lock);
|
||||
mutex_unlock(&dev_priv->cmdbuf_mutex);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/* validate buffer list + fixup relocations */
|
||||
ret = i915_validate_buffer_list(file_priv, 0, exec_buf->ops_list,
|
||||
buffers, &num_buffers);
|
||||
if (ret)
|
||||
goto out_err0;
|
||||
|
||||
/* make sure all previous memory operations have passed */
|
||||
DRM_MEMORYBARRIER();
|
||||
drm_agp_chipset_flush(dev);
|
||||
|
||||
/* submit buffer */
|
||||
batch->start = buffers[num_buffers-1].buffer->offset;
|
||||
|
||||
DRM_DEBUG("i915 exec batchbuffer, start %x used %d cliprects %d\n",
|
||||
batch->start, batch->used, batch->num_cliprects);
|
||||
|
||||
ret = i915_dispatch_batchbuffer(dev, batch);
|
||||
if (ret)
|
||||
goto out_err0;
|
||||
|
||||
if (sarea_priv)
|
||||
sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
|
||||
|
||||
i915_fence_or_sync(file_priv, fence_arg->flags, fence_arg, NULL);
|
||||
|
||||
out_err0:
|
||||
|
||||
/* handle errors */
|
||||
ret = i915_handle_copyback(dev, buffers, num_buffers, ret);
|
||||
mutex_lock(&dev->struct_mutex);
|
||||
i915_dereference_buffers_locked(buffers, num_buffers);
|
||||
mutex_unlock(&dev->struct_mutex);
|
||||
|
||||
drm_free(buffers, (exec_buf->num_buffers * sizeof(struct drm_buffer_object *)), DRM_MEM_DRIVER);
|
||||
|
||||
mutex_unlock(&dev_priv->cmdbuf_mutex);
|
||||
drm_bo_read_unlock(&dev->bm.bm_lock);
|
||||
return ret;
|
||||
}
|
||||
#endif
|
||||
Loading…
Reference in New Issue