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- /*
- * Copyright © 2008,2010 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- *
- * Authors:
- * Eric Anholt <eric@anholt.net>
- * Chris Wilson <chris@chris-wilson.co.uk>
- *
- */
- #include <drm/drmP.h>
- #include <drm/i915_drm.h>
- #include "i915_drv.h"
- #include "i915_trace.h"
- #include "intel_drv.h"
- #include <linux/dma_remapping.h>
- #include <linux/uaccess.h>
- #define __EXEC_OBJECT_HAS_PIN (1<<31)
- #define __EXEC_OBJECT_HAS_FENCE (1<<30)
- #define __EXEC_OBJECT_NEEDS_MAP (1<<29)
- #define __EXEC_OBJECT_NEEDS_BIAS (1<<28)
- #define BATCH_OFFSET_BIAS (256*1024)
- struct eb_vmas {
- struct list_head vmas;
- int and;
- union {
- struct i915_vma *lut[0];
- struct hlist_head buckets[0];
- };
- };
- static struct eb_vmas *
- eb_create(struct drm_i915_gem_execbuffer2 *args)
- {
- struct eb_vmas *eb = NULL;
- if (args->flags & I915_EXEC_HANDLE_LUT) {
- unsigned size = args->buffer_count;
- size *= sizeof(struct i915_vma *);
- size += sizeof(struct eb_vmas);
- eb = kmalloc(size, GFP_TEMPORARY | __GFP_NOWARN | __GFP_NORETRY);
- }
- if (eb == NULL) {
- unsigned size = args->buffer_count;
- unsigned count = PAGE_SIZE / sizeof(struct hlist_head) / 2;
- BUILD_BUG_ON_NOT_POWER_OF_2(PAGE_SIZE / sizeof(struct hlist_head));
- while (count > 2*size)
- count >>= 1;
- eb = kzalloc(count*sizeof(struct hlist_head) +
- sizeof(struct eb_vmas),
- GFP_TEMPORARY);
- if (eb == NULL)
- return eb;
- eb->and = count - 1;
- } else
- eb->and = -args->buffer_count;
- INIT_LIST_HEAD(&eb->vmas);
- return eb;
- }
- static void
- eb_reset(struct eb_vmas *eb)
- {
- if (eb->and >= 0)
- memset(eb->buckets, 0, (eb->and+1)*sizeof(struct hlist_head));
- }
- static int
- eb_lookup_vmas(struct eb_vmas *eb,
- struct drm_i915_gem_exec_object2 *exec,
- const struct drm_i915_gem_execbuffer2 *args,
- struct i915_address_space *vm,
- struct drm_file *file)
- {
- struct drm_i915_gem_object *obj;
- struct list_head objects;
- int i, ret;
- INIT_LIST_HEAD(&objects);
- spin_lock(&file->table_lock);
- /* Grab a reference to the object and release the lock so we can lookup
- * or create the VMA without using GFP_ATOMIC */
- for (i = 0; i < args->buffer_count; i++) {
- obj = to_intel_bo(idr_find(&file->object_idr, exec[i].handle));
- if (obj == NULL) {
- spin_unlock(&file->table_lock);
- DRM_DEBUG("Invalid object handle %d at index %d\n",
- exec[i].handle, i);
- ret = -ENOENT;
- goto err;
- }
- if (!list_empty(&obj->obj_exec_link)) {
- spin_unlock(&file->table_lock);
- DRM_DEBUG("Object %p [handle %d, index %d] appears more than once in object list\n",
- obj, exec[i].handle, i);
- ret = -EINVAL;
- goto err;
- }
- drm_gem_object_reference(&obj->base);
- list_add_tail(&obj->obj_exec_link, &objects);
- }
- spin_unlock(&file->table_lock);
- i = 0;
- while (!list_empty(&objects)) {
- struct i915_vma *vma;
- obj = list_first_entry(&objects,
- struct drm_i915_gem_object,
- obj_exec_link);
- /*
- * NOTE: We can leak any vmas created here when something fails
- * later on. But that's no issue since vma_unbind can deal with
- * vmas which are not actually bound. And since only
- * lookup_or_create exists as an interface to get at the vma
- * from the (obj, vm) we don't run the risk of creating
- * duplicated vmas for the same vm.
- */
- vma = i915_gem_obj_lookup_or_create_vma(obj, vm);
- if (IS_ERR(vma)) {
- DRM_DEBUG("Failed to lookup VMA\n");
- ret = PTR_ERR(vma);
- goto err;
- }
- /* Transfer ownership from the objects list to the vmas list. */
- list_add_tail(&vma->exec_list, &eb->vmas);
- list_del_init(&obj->obj_exec_link);
- vma->exec_entry = &exec[i];
- if (eb->and < 0) {
- eb->lut[i] = vma;
- } else {
- uint32_t handle = args->flags & I915_EXEC_HANDLE_LUT ? i : exec[i].handle;
- vma->exec_handle = handle;
- hlist_add_head(&vma->exec_node,
- &eb->buckets[handle & eb->and]);
- }
- ++i;
- }
- return 0;
- err:
- while (!list_empty(&objects)) {
- obj = list_first_entry(&objects,
- struct drm_i915_gem_object,
- obj_exec_link);
- list_del_init(&obj->obj_exec_link);
- drm_gem_object_unreference(&obj->base);
- }
- /*
- * Objects already transfered to the vmas list will be unreferenced by
- * eb_destroy.
- */
- return ret;
- }
- static struct i915_vma *eb_get_vma(struct eb_vmas *eb, unsigned long handle)
- {
- if (eb->and < 0) {
- if (handle >= -eb->and)
- return NULL;
- return eb->lut[handle];
- } else {
- struct hlist_head *head;
- struct hlist_node *node;
- head = &eb->buckets[handle & eb->and];
- hlist_for_each(node, head) {
- struct i915_vma *vma;
- vma = hlist_entry(node, struct i915_vma, exec_node);
- if (vma->exec_handle == handle)
- return vma;
- }
- return NULL;
- }
- }
- static void
- i915_gem_execbuffer_unreserve_vma(struct i915_vma *vma)
- {
- struct drm_i915_gem_exec_object2 *entry;
- struct drm_i915_gem_object *obj = vma->obj;
- if (!drm_mm_node_allocated(&vma->node))
- return;
- entry = vma->exec_entry;
- if (entry->flags & __EXEC_OBJECT_HAS_FENCE)
- i915_gem_object_unpin_fence(obj);
- if (entry->flags & __EXEC_OBJECT_HAS_PIN)
- vma->pin_count--;
- entry->flags &= ~(__EXEC_OBJECT_HAS_FENCE | __EXEC_OBJECT_HAS_PIN);
- }
- static void eb_destroy(struct eb_vmas *eb)
- {
- while (!list_empty(&eb->vmas)) {
- struct i915_vma *vma;
- vma = list_first_entry(&eb->vmas,
- struct i915_vma,
- exec_list);
- list_del_init(&vma->exec_list);
- i915_gem_execbuffer_unreserve_vma(vma);
- drm_gem_object_unreference(&vma->obj->base);
- }
- kfree(eb);
- }
- static inline int use_cpu_reloc(struct drm_i915_gem_object *obj)
- {
- return (HAS_LLC(obj->base.dev) ||
- obj->base.write_domain == I915_GEM_DOMAIN_CPU ||
- obj->cache_level != I915_CACHE_NONE);
- }
- static int
- relocate_entry_cpu(struct drm_i915_gem_object *obj,
- struct drm_i915_gem_relocation_entry *reloc,
- uint64_t target_offset)
- {
- struct drm_device *dev = obj->base.dev;
- uint32_t page_offset = offset_in_page(reloc->offset);
- uint64_t delta = reloc->delta + target_offset;
- char *vaddr;
- int ret;
- ret = i915_gem_object_set_to_cpu_domain(obj, true);
- if (ret)
- return ret;
- vaddr = kmap_atomic(i915_gem_object_get_page(obj,
- reloc->offset >> PAGE_SHIFT));
- *(uint32_t *)(vaddr + page_offset) = lower_32_bits(delta);
- if (INTEL_INFO(dev)->gen >= 8) {
- page_offset = offset_in_page(page_offset + sizeof(uint32_t));
- if (page_offset == 0) {
- kunmap_atomic(vaddr);
- vaddr = kmap_atomic(i915_gem_object_get_page(obj,
- (reloc->offset + sizeof(uint32_t)) >> PAGE_SHIFT));
- }
- *(uint32_t *)(vaddr + page_offset) = upper_32_bits(delta);
- }
- kunmap_atomic(vaddr);
- return 0;
- }
- static int
- relocate_entry_gtt(struct drm_i915_gem_object *obj,
- struct drm_i915_gem_relocation_entry *reloc,
- uint64_t target_offset)
- {
- struct drm_device *dev = obj->base.dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
- uint64_t delta = reloc->delta + target_offset;
- uint64_t offset;
- void __iomem *reloc_page;
- int ret;
- ret = i915_gem_object_set_to_gtt_domain(obj, true);
- if (ret)
- return ret;
- ret = i915_gem_object_put_fence(obj);
- if (ret)
- return ret;
- /* Map the page containing the relocation we're going to perform. */
- offset = i915_gem_obj_ggtt_offset(obj);
- offset += reloc->offset;
- reloc_page = io_mapping_map_atomic_wc(dev_priv->gtt.mappable,
- offset & PAGE_MASK);
- iowrite32(lower_32_bits(delta), reloc_page + offset_in_page(offset));
- if (INTEL_INFO(dev)->gen >= 8) {
- offset += sizeof(uint32_t);
- if (offset_in_page(offset) == 0) {
- io_mapping_unmap_atomic(reloc_page);
- reloc_page =
- io_mapping_map_atomic_wc(dev_priv->gtt.mappable,
- offset);
- }
- iowrite32(upper_32_bits(delta),
- reloc_page + offset_in_page(offset));
- }
- io_mapping_unmap_atomic(reloc_page);
- return 0;
- }
- static void
- clflush_write32(void *addr, uint32_t value)
- {
- /* This is not a fast path, so KISS. */
- drm_clflush_virt_range(addr, sizeof(uint32_t));
- *(uint32_t *)addr = value;
- drm_clflush_virt_range(addr, sizeof(uint32_t));
- }
- static int
- relocate_entry_clflush(struct drm_i915_gem_object *obj,
- struct drm_i915_gem_relocation_entry *reloc,
- uint64_t target_offset)
- {
- struct drm_device *dev = obj->base.dev;
- uint32_t page_offset = offset_in_page(reloc->offset);
- uint64_t delta = (int)reloc->delta + target_offset;
- char *vaddr;
- int ret;
- ret = i915_gem_object_set_to_gtt_domain(obj, true);
- if (ret)
- return ret;
- vaddr = kmap_atomic(i915_gem_object_get_page(obj,
- reloc->offset >> PAGE_SHIFT));
- clflush_write32(vaddr + page_offset, lower_32_bits(delta));
- if (INTEL_INFO(dev)->gen >= 8) {
- page_offset = offset_in_page(page_offset + sizeof(uint32_t));
- if (page_offset == 0) {
- kunmap_atomic(vaddr);
- vaddr = kmap_atomic(i915_gem_object_get_page(obj,
- (reloc->offset + sizeof(uint32_t)) >> PAGE_SHIFT));
- }
- clflush_write32(vaddr + page_offset, upper_32_bits(delta));
- }
- kunmap_atomic(vaddr);
- return 0;
- }
- static int
- i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj,
- struct eb_vmas *eb,
- struct drm_i915_gem_relocation_entry *reloc)
- {
- struct drm_device *dev = obj->base.dev;
- struct drm_gem_object *target_obj;
- struct drm_i915_gem_object *target_i915_obj;
- struct i915_vma *target_vma;
- uint64_t target_offset;
- int ret;
- /* we've already hold a reference to all valid objects */
- target_vma = eb_get_vma(eb, reloc->target_handle);
- if (unlikely(target_vma == NULL))
- return -ENOENT;
- target_i915_obj = target_vma->obj;
- target_obj = &target_vma->obj->base;
- target_offset = target_vma->node.start;
- /* Sandybridge PPGTT errata: We need a global gtt mapping for MI and
- * pipe_control writes because the gpu doesn't properly redirect them
- * through the ppgtt for non_secure batchbuffers. */
- if (unlikely(IS_GEN6(dev) &&
- reloc->write_domain == I915_GEM_DOMAIN_INSTRUCTION)) {
- ret = i915_vma_bind(target_vma, target_i915_obj->cache_level,
- PIN_GLOBAL);
- if (WARN_ONCE(ret, "Unexpected failure to bind target VMA!"))
- return ret;
- }
- /* Validate that the target is in a valid r/w GPU domain */
- if (unlikely(reloc->write_domain & (reloc->write_domain - 1))) {
- DRM_DEBUG("reloc with multiple write domains: "
- "obj %p target %d offset %d "
- "read %08x write %08x",
- obj, reloc->target_handle,
- (int) reloc->offset,
- reloc->read_domains,
- reloc->write_domain);
- return -EINVAL;
- }
- if (unlikely((reloc->write_domain | reloc->read_domains)
- & ~I915_GEM_GPU_DOMAINS)) {
- DRM_DEBUG("reloc with read/write non-GPU domains: "
- "obj %p target %d offset %d "
- "read %08x write %08x",
- obj, reloc->target_handle,
- (int) reloc->offset,
- reloc->read_domains,
- reloc->write_domain);
- return -EINVAL;
- }
- target_obj->pending_read_domains |= reloc->read_domains;
- target_obj->pending_write_domain |= reloc->write_domain;
- /* If the relocation already has the right value in it, no
- * more work needs to be done.
- */
- if (target_offset == reloc->presumed_offset)
- return 0;
- /* Check that the relocation address is valid... */
- if (unlikely(reloc->offset >
- obj->base.size - (INTEL_INFO(dev)->gen >= 8 ? 8 : 4))) {
- DRM_DEBUG("Relocation beyond object bounds: "
- "obj %p target %d offset %d size %d.\n",
- obj, reloc->target_handle,
- (int) reloc->offset,
- (int) obj->base.size);
- return -EINVAL;
- }
- if (unlikely(reloc->offset & 3)) {
- DRM_DEBUG("Relocation not 4-byte aligned: "
- "obj %p target %d offset %d.\n",
- obj, reloc->target_handle,
- (int) reloc->offset);
- return -EINVAL;
- }
- /* We can't wait for rendering with pagefaults disabled */
- if (obj->active && pagefault_disabled())
- return -EFAULT;
- if (use_cpu_reloc(obj))
- ret = relocate_entry_cpu(obj, reloc, target_offset);
- else if (obj->map_and_fenceable)
- ret = relocate_entry_gtt(obj, reloc, target_offset);
- else if (cpu_has_clflush)
- ret = relocate_entry_clflush(obj, reloc, target_offset);
- else {
- WARN_ONCE(1, "Impossible case in relocation handling\n");
- ret = -ENODEV;
- }
- if (ret)
- return ret;
- /* and update the user's relocation entry */
- reloc->presumed_offset = target_offset;
- return 0;
- }
- static int
- i915_gem_execbuffer_relocate_vma(struct i915_vma *vma,
- struct eb_vmas *eb)
- {
- #define N_RELOC(x) ((x) / sizeof(struct drm_i915_gem_relocation_entry))
- struct drm_i915_gem_relocation_entry stack_reloc[N_RELOC(512)];
- struct drm_i915_gem_relocation_entry __user *user_relocs;
- struct drm_i915_gem_exec_object2 *entry = vma->exec_entry;
- int remain, ret;
- user_relocs = to_user_ptr(entry->relocs_ptr);
- remain = entry->relocation_count;
- while (remain) {
- struct drm_i915_gem_relocation_entry *r = stack_reloc;
- int count = remain;
- if (count > ARRAY_SIZE(stack_reloc))
- count = ARRAY_SIZE(stack_reloc);
- remain -= count;
- if (__copy_from_user_inatomic(r, user_relocs, count*sizeof(r[0])))
- return -EFAULT;
- do {
- u64 offset = r->presumed_offset;
- ret = i915_gem_execbuffer_relocate_entry(vma->obj, eb, r);
- if (ret)
- return ret;
- if (r->presumed_offset != offset &&
- __copy_to_user_inatomic(&user_relocs->presumed_offset,
- &r->presumed_offset,
- sizeof(r->presumed_offset))) {
- return -EFAULT;
- }
- user_relocs++;
- r++;
- } while (--count);
- }
- return 0;
- #undef N_RELOC
- }
- static int
- i915_gem_execbuffer_relocate_vma_slow(struct i915_vma *vma,
- struct eb_vmas *eb,
- struct drm_i915_gem_relocation_entry *relocs)
- {
- const struct drm_i915_gem_exec_object2 *entry = vma->exec_entry;
- int i, ret;
- for (i = 0; i < entry->relocation_count; i++) {
- ret = i915_gem_execbuffer_relocate_entry(vma->obj, eb, &relocs[i]);
- if (ret)
- return ret;
- }
- return 0;
- }
- static int
- i915_gem_execbuffer_relocate(struct eb_vmas *eb)
- {
- struct i915_vma *vma;
- int ret = 0;
- /* This is the fast path and we cannot handle a pagefault whilst
- * holding the struct mutex lest the user pass in the relocations
- * contained within a mmaped bo. For in such a case we, the page
- * fault handler would call i915_gem_fault() and we would try to
- * acquire the struct mutex again. Obviously this is bad and so
- * lockdep complains vehemently.
- */
- pagefault_disable();
- list_for_each_entry(vma, &eb->vmas, exec_list) {
- ret = i915_gem_execbuffer_relocate_vma(vma, eb);
- if (ret)
- break;
- }
- pagefault_enable();
- return ret;
- }
- static bool only_mappable_for_reloc(unsigned int flags)
- {
- return (flags & (EXEC_OBJECT_NEEDS_FENCE | __EXEC_OBJECT_NEEDS_MAP)) ==
- __EXEC_OBJECT_NEEDS_MAP;
- }
- static int
- i915_gem_execbuffer_reserve_vma(struct i915_vma *vma,
- struct intel_engine_cs *ring,
- bool *need_reloc)
- {
- struct drm_i915_gem_object *obj = vma->obj;
- struct drm_i915_gem_exec_object2 *entry = vma->exec_entry;
- uint64_t flags;
- int ret;
- flags = PIN_USER;
- if (entry->flags & EXEC_OBJECT_NEEDS_GTT)
- flags |= PIN_GLOBAL;
- if (!drm_mm_node_allocated(&vma->node)) {
- /* Wa32bitGeneralStateOffset & Wa32bitInstructionBaseOffset,
- * limit address to the first 4GBs for unflagged objects.
- */
- if ((entry->flags & EXEC_OBJECT_SUPPORTS_48B_ADDRESS) == 0)
- flags |= PIN_ZONE_4G;
- if (entry->flags & __EXEC_OBJECT_NEEDS_MAP)
- flags |= PIN_GLOBAL | PIN_MAPPABLE;
- if (entry->flags & __EXEC_OBJECT_NEEDS_BIAS)
- flags |= BATCH_OFFSET_BIAS | PIN_OFFSET_BIAS;
- if ((flags & PIN_MAPPABLE) == 0)
- flags |= PIN_HIGH;
- }
- ret = i915_gem_object_pin(obj, vma->vm, entry->alignment, flags);
- if ((ret == -ENOSPC || ret == -E2BIG) &&
- only_mappable_for_reloc(entry->flags))
- ret = i915_gem_object_pin(obj, vma->vm,
- entry->alignment,
- flags & ~PIN_MAPPABLE);
- if (ret)
- return ret;
- entry->flags |= __EXEC_OBJECT_HAS_PIN;
- if (entry->flags & EXEC_OBJECT_NEEDS_FENCE) {
- ret = i915_gem_object_get_fence(obj);
- if (ret)
- return ret;
- if (i915_gem_object_pin_fence(obj))
- entry->flags |= __EXEC_OBJECT_HAS_FENCE;
- }
- if (entry->offset != vma->node.start) {
- entry->offset = vma->node.start;
- *need_reloc = true;
- }
- if (entry->flags & EXEC_OBJECT_WRITE) {
- obj->base.pending_read_domains = I915_GEM_DOMAIN_RENDER;
- obj->base.pending_write_domain = I915_GEM_DOMAIN_RENDER;
- }
- return 0;
- }
- static bool
- need_reloc_mappable(struct i915_vma *vma)
- {
- struct drm_i915_gem_exec_object2 *entry = vma->exec_entry;
- if (entry->relocation_count == 0)
- return false;
- if (!i915_is_ggtt(vma->vm))
- return false;
- /* See also use_cpu_reloc() */
- if (HAS_LLC(vma->obj->base.dev))
- return false;
- if (vma->obj->base.write_domain == I915_GEM_DOMAIN_CPU)
- return false;
- return true;
- }
- static bool
- eb_vma_misplaced(struct i915_vma *vma)
- {
- struct drm_i915_gem_exec_object2 *entry = vma->exec_entry;
- struct drm_i915_gem_object *obj = vma->obj;
- WARN_ON(entry->flags & __EXEC_OBJECT_NEEDS_MAP &&
- !i915_is_ggtt(vma->vm));
- if (entry->alignment &&
- vma->node.start & (entry->alignment - 1))
- return true;
- if (entry->flags & __EXEC_OBJECT_NEEDS_BIAS &&
- vma->node.start < BATCH_OFFSET_BIAS)
- return true;
- /* avoid costly ping-pong once a batch bo ended up non-mappable */
- if (entry->flags & __EXEC_OBJECT_NEEDS_MAP && !obj->map_and_fenceable)
- return !only_mappable_for_reloc(entry->flags);
- if ((entry->flags & EXEC_OBJECT_SUPPORTS_48B_ADDRESS) == 0 &&
- (vma->node.start + vma->node.size - 1) >> 32)
- return true;
- return false;
- }
- static int
- i915_gem_execbuffer_reserve(struct intel_engine_cs *ring,
- struct list_head *vmas,
- struct intel_context *ctx,
- bool *need_relocs)
- {
- struct drm_i915_gem_object *obj;
- struct i915_vma *vma;
- struct i915_address_space *vm;
- struct list_head ordered_vmas;
- bool has_fenced_gpu_access = INTEL_INFO(ring->dev)->gen < 4;
- int retry;
- i915_gem_retire_requests_ring(ring);
- vm = list_first_entry(vmas, struct i915_vma, exec_list)->vm;
- INIT_LIST_HEAD(&ordered_vmas);
- while (!list_empty(vmas)) {
- struct drm_i915_gem_exec_object2 *entry;
- bool need_fence, need_mappable;
- vma = list_first_entry(vmas, struct i915_vma, exec_list);
- obj = vma->obj;
- entry = vma->exec_entry;
- if (ctx->flags & CONTEXT_NO_ZEROMAP)
- entry->flags |= __EXEC_OBJECT_NEEDS_BIAS;
- if (!has_fenced_gpu_access)
- entry->flags &= ~EXEC_OBJECT_NEEDS_FENCE;
- need_fence =
- entry->flags & EXEC_OBJECT_NEEDS_FENCE &&
- obj->tiling_mode != I915_TILING_NONE;
- need_mappable = need_fence || need_reloc_mappable(vma);
- if (need_mappable) {
- entry->flags |= __EXEC_OBJECT_NEEDS_MAP;
- list_move(&vma->exec_list, &ordered_vmas);
- } else
- list_move_tail(&vma->exec_list, &ordered_vmas);
- obj->base.pending_read_domains = I915_GEM_GPU_DOMAINS & ~I915_GEM_DOMAIN_COMMAND;
- obj->base.pending_write_domain = 0;
- }
- list_splice(&ordered_vmas, vmas);
- /* Attempt to pin all of the buffers into the GTT.
- * This is done in 3 phases:
- *
- * 1a. Unbind all objects that do not match the GTT constraints for
- * the execbuffer (fenceable, mappable, alignment etc).
- * 1b. Increment pin count for already bound objects.
- * 2. Bind new objects.
- * 3. Decrement pin count.
- *
- * This avoid unnecessary unbinding of later objects in order to make
- * room for the earlier objects *unless* we need to defragment.
- */
- retry = 0;
- do {
- int ret = 0;
- /* Unbind any ill-fitting objects or pin. */
- list_for_each_entry(vma, vmas, exec_list) {
- if (!drm_mm_node_allocated(&vma->node))
- continue;
- if (eb_vma_misplaced(vma))
- ret = i915_vma_unbind(vma);
- else
- ret = i915_gem_execbuffer_reserve_vma(vma, ring, need_relocs);
- if (ret)
- goto err;
- }
- /* Bind fresh objects */
- list_for_each_entry(vma, vmas, exec_list) {
- if (drm_mm_node_allocated(&vma->node))
- continue;
- ret = i915_gem_execbuffer_reserve_vma(vma, ring, need_relocs);
- if (ret)
- goto err;
- }
- err:
- if (ret != -ENOSPC || retry++)
- return ret;
- /* Decrement pin count for bound objects */
- list_for_each_entry(vma, vmas, exec_list)
- i915_gem_execbuffer_unreserve_vma(vma);
- ret = i915_gem_evict_vm(vm, true);
- if (ret)
- return ret;
- } while (1);
- }
- static int
- i915_gem_execbuffer_relocate_slow(struct drm_device *dev,
- struct drm_i915_gem_execbuffer2 *args,
- struct drm_file *file,
- struct intel_engine_cs *ring,
- struct eb_vmas *eb,
- struct drm_i915_gem_exec_object2 *exec,
- struct intel_context *ctx)
- {
- struct drm_i915_gem_relocation_entry *reloc;
- struct i915_address_space *vm;
- struct i915_vma *vma;
- bool need_relocs;
- int *reloc_offset;
- int i, total, ret;
- unsigned count = args->buffer_count;
- vm = list_first_entry(&eb->vmas, struct i915_vma, exec_list)->vm;
- /* We may process another execbuffer during the unlock... */
- while (!list_empty(&eb->vmas)) {
- vma = list_first_entry(&eb->vmas, struct i915_vma, exec_list);
- list_del_init(&vma->exec_list);
- i915_gem_execbuffer_unreserve_vma(vma);
- drm_gem_object_unreference(&vma->obj->base);
- }
- mutex_unlock(&dev->struct_mutex);
- total = 0;
- for (i = 0; i < count; i++)
- total += exec[i].relocation_count;
- reloc_offset = drm_malloc_ab(count, sizeof(*reloc_offset));
- reloc = drm_malloc_ab(total, sizeof(*reloc));
- if (reloc == NULL || reloc_offset == NULL) {
- drm_free_large(reloc);
- drm_free_large(reloc_offset);
- mutex_lock(&dev->struct_mutex);
- return -ENOMEM;
- }
- total = 0;
- for (i = 0; i < count; i++) {
- struct drm_i915_gem_relocation_entry __user *user_relocs;
- u64 invalid_offset = (u64)-1;
- int j;
- user_relocs = to_user_ptr(exec[i].relocs_ptr);
- if (copy_from_user(reloc+total, user_relocs,
- exec[i].relocation_count * sizeof(*reloc))) {
- ret = -EFAULT;
- mutex_lock(&dev->struct_mutex);
- goto err;
- }
- /* As we do not update the known relocation offsets after
- * relocating (due to the complexities in lock handling),
- * we need to mark them as invalid now so that we force the
- * relocation processing next time. Just in case the target
- * object is evicted and then rebound into its old
- * presumed_offset before the next execbuffer - if that
- * happened we would make the mistake of assuming that the
- * relocations were valid.
- */
- for (j = 0; j < exec[i].relocation_count; j++) {
- if (__copy_to_user(&user_relocs[j].presumed_offset,
- &invalid_offset,
- sizeof(invalid_offset))) {
- ret = -EFAULT;
- mutex_lock(&dev->struct_mutex);
- goto err;
- }
- }
- reloc_offset[i] = total;
- total += exec[i].relocation_count;
- }
- ret = i915_mutex_lock_interruptible(dev);
- if (ret) {
- mutex_lock(&dev->struct_mutex);
- goto err;
- }
- /* reacquire the objects */
- eb_reset(eb);
- ret = eb_lookup_vmas(eb, exec, args, vm, file);
- if (ret)
- goto err;
- need_relocs = (args->flags & I915_EXEC_NO_RELOC) == 0;
- ret = i915_gem_execbuffer_reserve(ring, &eb->vmas, ctx, &need_relocs);
- if (ret)
- goto err;
- list_for_each_entry(vma, &eb->vmas, exec_list) {
- int offset = vma->exec_entry - exec;
- ret = i915_gem_execbuffer_relocate_vma_slow(vma, eb,
- reloc + reloc_offset[offset]);
- if (ret)
- goto err;
- }
- /* Leave the user relocations as are, this is the painfully slow path,
- * and we want to avoid the complication of dropping the lock whilst
- * having buffers reserved in the aperture and so causing spurious
- * ENOSPC for random operations.
- */
- err:
- drm_free_large(reloc);
- drm_free_large(reloc_offset);
- return ret;
- }
- static int
- i915_gem_execbuffer_move_to_gpu(struct drm_i915_gem_request *req,
- struct list_head *vmas)
- {
- const unsigned other_rings = ~intel_ring_flag(req->ring);
- struct i915_vma *vma;
- uint32_t flush_domains = 0;
- bool flush_chipset = false;
- int ret;
- list_for_each_entry(vma, vmas, exec_list) {
- struct drm_i915_gem_object *obj = vma->obj;
- if (obj->active & other_rings) {
- ret = i915_gem_object_sync(obj, req->ring, &req);
- if (ret)
- return ret;
- }
- if (obj->base.write_domain & I915_GEM_DOMAIN_CPU)
- flush_chipset |= i915_gem_clflush_object(obj, false);
- flush_domains |= obj->base.write_domain;
- }
- if (flush_chipset)
- i915_gem_chipset_flush(req->ring->dev);
- if (flush_domains & I915_GEM_DOMAIN_GTT)
- wmb();
- /* Unconditionally invalidate gpu caches and ensure that we do flush
- * any residual writes from the previous batch.
- */
- return intel_ring_invalidate_all_caches(req);
- }
- static bool
- i915_gem_check_execbuffer(struct drm_i915_gem_execbuffer2 *exec)
- {
- if (exec->flags & __I915_EXEC_UNKNOWN_FLAGS)
- return false;
- /* Kernel clipping was a DRI1 misfeature */
- if (exec->num_cliprects || exec->cliprects_ptr)
- return false;
- if (exec->DR4 == 0xffffffff) {
- DRM_DEBUG("UXA submitting garbage DR4, fixing up\n");
- exec->DR4 = 0;
- }
- if (exec->DR1 || exec->DR4)
- return false;
- if ((exec->batch_start_offset | exec->batch_len) & 0x7)
- return false;
- return true;
- }
- static int
- validate_exec_list(struct drm_device *dev,
- struct drm_i915_gem_exec_object2 *exec,
- int count)
- {
- unsigned relocs_total = 0;
- unsigned relocs_max = UINT_MAX / sizeof(struct drm_i915_gem_relocation_entry);
- unsigned invalid_flags;
- int i;
- invalid_flags = __EXEC_OBJECT_UNKNOWN_FLAGS;
- if (USES_FULL_PPGTT(dev))
- invalid_flags |= EXEC_OBJECT_NEEDS_GTT;
- for (i = 0; i < count; i++) {
- char __user *ptr = to_user_ptr(exec[i].relocs_ptr);
- int length; /* limited by fault_in_pages_readable() */
- if (exec[i].flags & invalid_flags)
- return -EINVAL;
- if (exec[i].alignment && !is_power_of_2(exec[i].alignment))
- return -EINVAL;
- /* First check for malicious input causing overflow in
- * the worst case where we need to allocate the entire
- * relocation tree as a single array.
- */
- if (exec[i].relocation_count > relocs_max - relocs_total)
- return -EINVAL;
- relocs_total += exec[i].relocation_count;
- length = exec[i].relocation_count *
- sizeof(struct drm_i915_gem_relocation_entry);
- /*
- * We must check that the entire relocation array is safe
- * to read, but since we may need to update the presumed
- * offsets during execution, check for full write access.
- */
- if (!access_ok(VERIFY_WRITE, ptr, length))
- return -EFAULT;
- if (likely(!i915.prefault_disable)) {
- if (fault_in_multipages_readable(ptr, length))
- return -EFAULT;
- }
- }
- return 0;
- }
- static struct intel_context *
- i915_gem_validate_context(struct drm_device *dev, struct drm_file *file,
- struct intel_engine_cs *ring, const u32 ctx_id)
- {
- struct intel_context *ctx = NULL;
- struct i915_ctx_hang_stats *hs;
- if (ring->id != RCS && ctx_id != DEFAULT_CONTEXT_HANDLE)
- return ERR_PTR(-EINVAL);
- ctx = i915_gem_context_get(file->driver_priv, ctx_id);
- if (IS_ERR(ctx))
- return ctx;
- hs = &ctx->hang_stats;
- if (hs->banned) {
- DRM_DEBUG("Context %u tried to submit while banned\n", ctx_id);
- return ERR_PTR(-EIO);
- }
- if (i915.enable_execlists && !ctx->engine[ring->id].state) {
- int ret = intel_lr_context_deferred_alloc(ctx, ring);
- if (ret) {
- DRM_DEBUG("Could not create LRC %u: %d\n", ctx_id, ret);
- return ERR_PTR(ret);
- }
- }
- return ctx;
- }
- void
- i915_gem_execbuffer_move_to_active(struct list_head *vmas,
- struct drm_i915_gem_request *req)
- {
- struct intel_engine_cs *ring = i915_gem_request_get_ring(req);
- struct i915_vma *vma;
- list_for_each_entry(vma, vmas, exec_list) {
- struct drm_i915_gem_exec_object2 *entry = vma->exec_entry;
- struct drm_i915_gem_object *obj = vma->obj;
- u32 old_read = obj->base.read_domains;
- u32 old_write = obj->base.write_domain;
- obj->dirty = 1; /* be paranoid */
- obj->base.write_domain = obj->base.pending_write_domain;
- if (obj->base.write_domain == 0)
- obj->base.pending_read_domains |= obj->base.read_domains;
- obj->base.read_domains = obj->base.pending_read_domains;
- i915_vma_move_to_active(vma, req);
- if (obj->base.write_domain) {
- i915_gem_request_assign(&obj->last_write_req, req);
- intel_fb_obj_invalidate(obj, ORIGIN_CS);
- /* update for the implicit flush after a batch */
- obj->base.write_domain &= ~I915_GEM_GPU_DOMAINS;
- }
- if (entry->flags & EXEC_OBJECT_NEEDS_FENCE) {
- i915_gem_request_assign(&obj->last_fenced_req, req);
- if (entry->flags & __EXEC_OBJECT_HAS_FENCE) {
- struct drm_i915_private *dev_priv = to_i915(ring->dev);
- list_move_tail(&dev_priv->fence_regs[obj->fence_reg].lru_list,
- &dev_priv->mm.fence_list);
- }
- }
- trace_i915_gem_object_change_domain(obj, old_read, old_write);
- }
- }
- void
- i915_gem_execbuffer_retire_commands(struct i915_execbuffer_params *params)
- {
- /* Unconditionally force add_request to emit a full flush. */
- params->ring->gpu_caches_dirty = true;
- /* Add a breadcrumb for the completion of the batch buffer */
- __i915_add_request(params->request, params->batch_obj, true);
- }
- static int
- i915_reset_gen7_sol_offsets(struct drm_device *dev,
- struct drm_i915_gem_request *req)
- {
- struct intel_engine_cs *ring = req->ring;
- struct drm_i915_private *dev_priv = dev->dev_private;
- int ret, i;
- if (!IS_GEN7(dev) || ring != &dev_priv->ring[RCS]) {
- DRM_DEBUG("sol reset is gen7/rcs only\n");
- return -EINVAL;
- }
- ret = intel_ring_begin(req, 4 * 3);
- if (ret)
- return ret;
- for (i = 0; i < 4; i++) {
- intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
- intel_ring_emit(ring, GEN7_SO_WRITE_OFFSET(i));
- intel_ring_emit(ring, 0);
- }
- intel_ring_advance(ring);
- return 0;
- }
- static struct drm_i915_gem_object*
- i915_gem_execbuffer_parse(struct intel_engine_cs *ring,
- struct drm_i915_gem_exec_object2 *shadow_exec_entry,
- struct eb_vmas *eb,
- struct drm_i915_gem_object *batch_obj,
- u32 batch_start_offset,
- u32 batch_len,
- bool is_master)
- {
- struct drm_i915_gem_object *shadow_batch_obj;
- struct i915_vma *vma;
- int ret;
- shadow_batch_obj = i915_gem_batch_pool_get(&ring->batch_pool,
- PAGE_ALIGN(batch_len));
- if (IS_ERR(shadow_batch_obj))
- return shadow_batch_obj;
- ret = i915_parse_cmds(ring,
- batch_obj,
- shadow_batch_obj,
- batch_start_offset,
- batch_len,
- is_master);
- if (ret)
- goto err;
- ret = i915_gem_obj_ggtt_pin(shadow_batch_obj, 0, 0);
- if (ret)
- goto err;
- i915_gem_object_unpin_pages(shadow_batch_obj);
- memset(shadow_exec_entry, 0, sizeof(*shadow_exec_entry));
- vma = i915_gem_obj_to_ggtt(shadow_batch_obj);
- vma->exec_entry = shadow_exec_entry;
- vma->exec_entry->flags = __EXEC_OBJECT_HAS_PIN;
- drm_gem_object_reference(&shadow_batch_obj->base);
- list_add_tail(&vma->exec_list, &eb->vmas);
- shadow_batch_obj->base.pending_read_domains = I915_GEM_DOMAIN_COMMAND;
- return shadow_batch_obj;
- err:
- i915_gem_object_unpin_pages(shadow_batch_obj);
- if (ret == -EACCES) /* unhandled chained batch */
- return batch_obj;
- else
- return ERR_PTR(ret);
- }
- int
- i915_gem_ringbuffer_submission(struct i915_execbuffer_params *params,
- struct drm_i915_gem_execbuffer2 *args,
- struct list_head *vmas)
- {
- struct drm_device *dev = params->dev;
- struct intel_engine_cs *ring = params->ring;
- struct drm_i915_private *dev_priv = dev->dev_private;
- u64 exec_start, exec_len;
- int instp_mode;
- u32 instp_mask;
- int ret;
- ret = i915_gem_execbuffer_move_to_gpu(params->request, vmas);
- if (ret)
- return ret;
- ret = i915_switch_context(params->request);
- if (ret)
- return ret;
- WARN(params->ctx->ppgtt && params->ctx->ppgtt->pd_dirty_rings & (1<<ring->id),
- "%s didn't clear reload\n", ring->name);
- instp_mode = args->flags & I915_EXEC_CONSTANTS_MASK;
- instp_mask = I915_EXEC_CONSTANTS_MASK;
- switch (instp_mode) {
- case I915_EXEC_CONSTANTS_REL_GENERAL:
- case I915_EXEC_CONSTANTS_ABSOLUTE:
- case I915_EXEC_CONSTANTS_REL_SURFACE:
- if (instp_mode != 0 && ring != &dev_priv->ring[RCS]) {
- DRM_DEBUG("non-0 rel constants mode on non-RCS\n");
- return -EINVAL;
- }
- if (instp_mode != dev_priv->relative_constants_mode) {
- if (INTEL_INFO(dev)->gen < 4) {
- DRM_DEBUG("no rel constants on pre-gen4\n");
- return -EINVAL;
- }
- if (INTEL_INFO(dev)->gen > 5 &&
- instp_mode == I915_EXEC_CONSTANTS_REL_SURFACE) {
- DRM_DEBUG("rel surface constants mode invalid on gen5+\n");
- return -EINVAL;
- }
- /* The HW changed the meaning on this bit on gen6 */
- if (INTEL_INFO(dev)->gen >= 6)
- instp_mask &= ~I915_EXEC_CONSTANTS_REL_SURFACE;
- }
- break;
- default:
- DRM_DEBUG("execbuf with unknown constants: %d\n", instp_mode);
- return -EINVAL;
- }
- if (ring == &dev_priv->ring[RCS] &&
- instp_mode != dev_priv->relative_constants_mode) {
- ret = intel_ring_begin(params->request, 4);
- if (ret)
- return ret;
- intel_ring_emit(ring, MI_NOOP);
- intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
- intel_ring_emit(ring, INSTPM);
- intel_ring_emit(ring, instp_mask << 16 | instp_mode);
- intel_ring_advance(ring);
- dev_priv->relative_constants_mode = instp_mode;
- }
- if (args->flags & I915_EXEC_GEN7_SOL_RESET) {
- ret = i915_reset_gen7_sol_offsets(dev, params->request);
- if (ret)
- return ret;
- }
- exec_len = args->batch_len;
- exec_start = params->batch_obj_vm_offset +
- params->args_batch_start_offset;
- ret = ring->dispatch_execbuffer(params->request,
- exec_start, exec_len,
- params->dispatch_flags);
- if (ret)
- return ret;
- trace_i915_gem_ring_dispatch(params->request, params->dispatch_flags);
- i915_gem_execbuffer_move_to_active(vmas, params->request);
- i915_gem_execbuffer_retire_commands(params);
- return 0;
- }
- /**
- * Find one BSD ring to dispatch the corresponding BSD command.
- * The Ring ID is returned.
- */
- static int gen8_dispatch_bsd_ring(struct drm_device *dev,
- struct drm_file *file)
- {
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct drm_i915_file_private *file_priv = file->driver_priv;
- /* Check whether the file_priv is using one ring */
- if (file_priv->bsd_ring)
- return file_priv->bsd_ring->id;
- else {
- /* If no, use the ping-pong mechanism to select one ring */
- int ring_id;
- mutex_lock(&dev->struct_mutex);
- if (dev_priv->mm.bsd_ring_dispatch_index == 0) {
- ring_id = VCS;
- dev_priv->mm.bsd_ring_dispatch_index = 1;
- } else {
- ring_id = VCS2;
- dev_priv->mm.bsd_ring_dispatch_index = 0;
- }
- file_priv->bsd_ring = &dev_priv->ring[ring_id];
- mutex_unlock(&dev->struct_mutex);
- return ring_id;
- }
- }
- static struct drm_i915_gem_object *
- eb_get_batch(struct eb_vmas *eb)
- {
- struct i915_vma *vma = list_entry(eb->vmas.prev, typeof(*vma), exec_list);
- /*
- * SNA is doing fancy tricks with compressing batch buffers, which leads
- * to negative relocation deltas. Usually that works out ok since the
- * relocate address is still positive, except when the batch is placed
- * very low in the GTT. Ensure this doesn't happen.
- *
- * Note that actual hangs have only been observed on gen7, but for
- * paranoia do it everywhere.
- */
- vma->exec_entry->flags |= __EXEC_OBJECT_NEEDS_BIAS;
- return vma->obj;
- }
- static int
- i915_gem_do_execbuffer(struct drm_device *dev, void *data,
- struct drm_file *file,
- struct drm_i915_gem_execbuffer2 *args,
- struct drm_i915_gem_exec_object2 *exec)
- {
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct eb_vmas *eb;
- struct drm_i915_gem_object *batch_obj;
- struct drm_i915_gem_exec_object2 shadow_exec_entry;
- struct intel_engine_cs *ring;
- struct intel_context *ctx;
- struct i915_address_space *vm;
- struct i915_execbuffer_params params_master; /* XXX: will be removed later */
- struct i915_execbuffer_params *params = ¶ms_master;
- const u32 ctx_id = i915_execbuffer2_get_context_id(*args);
- u32 dispatch_flags;
- int ret;
- bool need_relocs;
- if (!i915_gem_check_execbuffer(args))
- return -EINVAL;
- ret = validate_exec_list(dev, exec, args->buffer_count);
- if (ret)
- return ret;
- dispatch_flags = 0;
- if (args->flags & I915_EXEC_SECURE) {
- if (!file->is_master || !capable(CAP_SYS_ADMIN))
- return -EPERM;
- dispatch_flags |= I915_DISPATCH_SECURE;
- }
- if (args->flags & I915_EXEC_IS_PINNED)
- dispatch_flags |= I915_DISPATCH_PINNED;
- if ((args->flags & I915_EXEC_RING_MASK) > LAST_USER_RING) {
- DRM_DEBUG("execbuf with unknown ring: %d\n",
- (int)(args->flags & I915_EXEC_RING_MASK));
- return -EINVAL;
- }
- if (((args->flags & I915_EXEC_RING_MASK) != I915_EXEC_BSD) &&
- ((args->flags & I915_EXEC_BSD_MASK) != 0)) {
- DRM_DEBUG("execbuf with non bsd ring but with invalid "
- "bsd dispatch flags: %d\n", (int)(args->flags));
- return -EINVAL;
- }
- if ((args->flags & I915_EXEC_RING_MASK) == I915_EXEC_DEFAULT)
- ring = &dev_priv->ring[RCS];
- else if ((args->flags & I915_EXEC_RING_MASK) == I915_EXEC_BSD) {
- if (HAS_BSD2(dev)) {
- int ring_id;
- switch (args->flags & I915_EXEC_BSD_MASK) {
- case I915_EXEC_BSD_DEFAULT:
- ring_id = gen8_dispatch_bsd_ring(dev, file);
- ring = &dev_priv->ring[ring_id];
- break;
- case I915_EXEC_BSD_RING1:
- ring = &dev_priv->ring[VCS];
- break;
- case I915_EXEC_BSD_RING2:
- ring = &dev_priv->ring[VCS2];
- break;
- default:
- DRM_DEBUG("execbuf with unknown bsd ring: %d\n",
- (int)(args->flags & I915_EXEC_BSD_MASK));
- return -EINVAL;
- }
- } else
- ring = &dev_priv->ring[VCS];
- } else
- ring = &dev_priv->ring[(args->flags & I915_EXEC_RING_MASK) - 1];
- if (!intel_ring_initialized(ring)) {
- DRM_DEBUG("execbuf with invalid ring: %d\n",
- (int)(args->flags & I915_EXEC_RING_MASK));
- return -EINVAL;
- }
- if (args->buffer_count < 1) {
- DRM_DEBUG("execbuf with %d buffers\n", args->buffer_count);
- return -EINVAL;
- }
- if (args->flags & I915_EXEC_RESOURCE_STREAMER) {
- if (!HAS_RESOURCE_STREAMER(dev)) {
- DRM_DEBUG("RS is only allowed for Haswell, Gen8 and above\n");
- return -EINVAL;
- }
- if (ring->id != RCS) {
- DRM_DEBUG("RS is not available on %s\n",
- ring->name);
- return -EINVAL;
- }
- dispatch_flags |= I915_DISPATCH_RS;
- }
- intel_runtime_pm_get(dev_priv);
- ret = i915_mutex_lock_interruptible(dev);
- if (ret)
- goto pre_mutex_err;
- ctx = i915_gem_validate_context(dev, file, ring, ctx_id);
- if (IS_ERR(ctx)) {
- mutex_unlock(&dev->struct_mutex);
- ret = PTR_ERR(ctx);
- goto pre_mutex_err;
- }
- i915_gem_context_reference(ctx);
- if (ctx->ppgtt)
- vm = &ctx->ppgtt->base;
- else
- vm = &dev_priv->gtt.base;
- memset(¶ms_master, 0x00, sizeof(params_master));
- eb = eb_create(args);
- if (eb == NULL) {
- i915_gem_context_unreference(ctx);
- mutex_unlock(&dev->struct_mutex);
- ret = -ENOMEM;
- goto pre_mutex_err;
- }
- /* Look up object handles */
- ret = eb_lookup_vmas(eb, exec, args, vm, file);
- if (ret)
- goto err;
- /* take note of the batch buffer before we might reorder the lists */
- batch_obj = eb_get_batch(eb);
- /* Move the objects en-masse into the GTT, evicting if necessary. */
- need_relocs = (args->flags & I915_EXEC_NO_RELOC) == 0;
- ret = i915_gem_execbuffer_reserve(ring, &eb->vmas, ctx, &need_relocs);
- if (ret)
- goto err;
- /* The objects are in their final locations, apply the relocations. */
- if (need_relocs)
- ret = i915_gem_execbuffer_relocate(eb);
- if (ret) {
- if (ret == -EFAULT) {
- ret = i915_gem_execbuffer_relocate_slow(dev, args, file, ring,
- eb, exec, ctx);
- BUG_ON(!mutex_is_locked(&dev->struct_mutex));
- }
- if (ret)
- goto err;
- }
- /* Set the pending read domains for the batch buffer to COMMAND */
- if (batch_obj->base.pending_write_domain) {
- DRM_DEBUG("Attempting to use self-modifying batch buffer\n");
- ret = -EINVAL;
- goto err;
- }
- params->args_batch_start_offset = args->batch_start_offset;
- if (i915_needs_cmd_parser(ring) && args->batch_len) {
- struct drm_i915_gem_object *parsed_batch_obj;
- parsed_batch_obj = i915_gem_execbuffer_parse(ring,
- &shadow_exec_entry,
- eb,
- batch_obj,
- args->batch_start_offset,
- args->batch_len,
- file->is_master);
- if (IS_ERR(parsed_batch_obj)) {
- ret = PTR_ERR(parsed_batch_obj);
- goto err;
- }
- /*
- * parsed_batch_obj == batch_obj means batch not fully parsed:
- * Accept, but don't promote to secure.
- */
- if (parsed_batch_obj != batch_obj) {
- /*
- * Batch parsed and accepted:
- *
- * Set the DISPATCH_SECURE bit to remove the NON_SECURE
- * bit from MI_BATCH_BUFFER_START commands issued in
- * the dispatch_execbuffer implementations. We
- * specifically don't want that set on batches the
- * command parser has accepted.
- */
- dispatch_flags |= I915_DISPATCH_SECURE;
- params->args_batch_start_offset = 0;
- batch_obj = parsed_batch_obj;
- }
- }
- batch_obj->base.pending_read_domains |= I915_GEM_DOMAIN_COMMAND;
- /* snb/ivb/vlv conflate the "batch in ppgtt" bit with the "non-secure
- * batch" bit. Hence we need to pin secure batches into the global gtt.
- * hsw should have this fixed, but bdw mucks it up again. */
- if (dispatch_flags & I915_DISPATCH_SECURE) {
- /*
- * So on first glance it looks freaky that we pin the batch here
- * outside of the reservation loop. But:
- * - The batch is already pinned into the relevant ppgtt, so we
- * already have the backing storage fully allocated.
- * - No other BO uses the global gtt (well contexts, but meh),
- * so we don't really have issues with multiple objects not
- * fitting due to fragmentation.
- * So this is actually safe.
- */
- ret = i915_gem_obj_ggtt_pin(batch_obj, 0, 0);
- if (ret)
- goto err;
- params->batch_obj_vm_offset = i915_gem_obj_ggtt_offset(batch_obj);
- } else
- params->batch_obj_vm_offset = i915_gem_obj_offset(batch_obj, vm);
- /* Allocate a request for this batch buffer nice and early. */
- ret = i915_gem_request_alloc(ring, ctx, ¶ms->request);
- if (ret)
- goto err_batch_unpin;
- ret = i915_gem_request_add_to_client(params->request, file);
- if (ret)
- goto err_batch_unpin;
- /*
- * Save assorted stuff away to pass through to *_submission().
- * NB: This data should be 'persistent' and not local as it will
- * kept around beyond the duration of the IOCTL once the GPU
- * scheduler arrives.
- */
- params->dev = dev;
- params->file = file;
- params->ring = ring;
- params->dispatch_flags = dispatch_flags;
- params->batch_obj = batch_obj;
- params->ctx = ctx;
- ret = dev_priv->gt.execbuf_submit(params, args, &eb->vmas);
- err_batch_unpin:
- /*
- * FIXME: We crucially rely upon the active tracking for the (ppgtt)
- * batch vma for correctness. For less ugly and less fragility this
- * needs to be adjusted to also track the ggtt batch vma properly as
- * active.
- */
- if (dispatch_flags & I915_DISPATCH_SECURE)
- i915_gem_object_ggtt_unpin(batch_obj);
- err:
- /* the request owns the ref now */
- i915_gem_context_unreference(ctx);
- eb_destroy(eb);
- /*
- * If the request was created but not successfully submitted then it
- * must be freed again. If it was submitted then it is being tracked
- * on the active request list and no clean up is required here.
- */
- if (ret && params->request)
- i915_gem_request_cancel(params->request);
- mutex_unlock(&dev->struct_mutex);
- pre_mutex_err:
- /* intel_gpu_busy should also get a ref, so it will free when the device
- * is really idle. */
- intel_runtime_pm_put(dev_priv);
- return ret;
- }
- /*
- * Legacy execbuffer just creates an exec2 list from the original exec object
- * list array and passes it to the real function.
- */
- int
- i915_gem_execbuffer(struct drm_device *dev, void *data,
- struct drm_file *file)
- {
- struct drm_i915_gem_execbuffer *args = data;
- struct drm_i915_gem_execbuffer2 exec2;
- struct drm_i915_gem_exec_object *exec_list = NULL;
- struct drm_i915_gem_exec_object2 *exec2_list = NULL;
- int ret, i;
- if (args->buffer_count < 1) {
- DRM_DEBUG("execbuf with %d buffers\n", args->buffer_count);
- return -EINVAL;
- }
- /* Copy in the exec list from userland */
- exec_list = drm_malloc_ab(sizeof(*exec_list), args->buffer_count);
- exec2_list = drm_malloc_ab(sizeof(*exec2_list), args->buffer_count);
- if (exec_list == NULL || exec2_list == NULL) {
- DRM_DEBUG("Failed to allocate exec list for %d buffers\n",
- args->buffer_count);
- drm_free_large(exec_list);
- drm_free_large(exec2_list);
- return -ENOMEM;
- }
- ret = copy_from_user(exec_list,
- to_user_ptr(args->buffers_ptr),
- sizeof(*exec_list) * args->buffer_count);
- if (ret != 0) {
- DRM_DEBUG("copy %d exec entries failed %d\n",
- args->buffer_count, ret);
- drm_free_large(exec_list);
- drm_free_large(exec2_list);
- return -EFAULT;
- }
- for (i = 0; i < args->buffer_count; i++) {
- exec2_list[i].handle = exec_list[i].handle;
- exec2_list[i].relocation_count = exec_list[i].relocation_count;
- exec2_list[i].relocs_ptr = exec_list[i].relocs_ptr;
- exec2_list[i].alignment = exec_list[i].alignment;
- exec2_list[i].offset = exec_list[i].offset;
- if (INTEL_INFO(dev)->gen < 4)
- exec2_list[i].flags = EXEC_OBJECT_NEEDS_FENCE;
- else
- exec2_list[i].flags = 0;
- }
- exec2.buffers_ptr = args->buffers_ptr;
- exec2.buffer_count = args->buffer_count;
- exec2.batch_start_offset = args->batch_start_offset;
- exec2.batch_len = args->batch_len;
- exec2.DR1 = args->DR1;
- exec2.DR4 = args->DR4;
- exec2.num_cliprects = args->num_cliprects;
- exec2.cliprects_ptr = args->cliprects_ptr;
- exec2.flags = I915_EXEC_RENDER;
- i915_execbuffer2_set_context_id(exec2, 0);
- ret = i915_gem_do_execbuffer(dev, data, file, &exec2, exec2_list);
- if (!ret) {
- struct drm_i915_gem_exec_object __user *user_exec_list =
- to_user_ptr(args->buffers_ptr);
- /* Copy the new buffer offsets back to the user's exec list. */
- for (i = 0; i < args->buffer_count; i++) {
- ret = __copy_to_user(&user_exec_list[i].offset,
- &exec2_list[i].offset,
- sizeof(user_exec_list[i].offset));
- if (ret) {
- ret = -EFAULT;
- DRM_DEBUG("failed to copy %d exec entries "
- "back to user (%d)\n",
- args->buffer_count, ret);
- break;
- }
- }
- }
- drm_free_large(exec_list);
- drm_free_large(exec2_list);
- return ret;
- }
- int
- i915_gem_execbuffer2(struct drm_device *dev, void *data,
- struct drm_file *file)
- {
- struct drm_i915_gem_execbuffer2 *args = data;
- struct drm_i915_gem_exec_object2 *exec2_list = NULL;
- int ret;
- if (args->buffer_count < 1 ||
- args->buffer_count > UINT_MAX / sizeof(*exec2_list)) {
- DRM_DEBUG("execbuf2 with %d buffers\n", args->buffer_count);
- return -EINVAL;
- }
- if (args->rsvd2 != 0) {
- DRM_DEBUG("dirty rvsd2 field\n");
- return -EINVAL;
- }
- exec2_list = kmalloc(sizeof(*exec2_list)*args->buffer_count,
- GFP_TEMPORARY | __GFP_NOWARN | __GFP_NORETRY);
- if (exec2_list == NULL)
- exec2_list = drm_malloc_ab(sizeof(*exec2_list),
- args->buffer_count);
- if (exec2_list == NULL) {
- DRM_DEBUG("Failed to allocate exec list for %d buffers\n",
- args->buffer_count);
- return -ENOMEM;
- }
- ret = copy_from_user(exec2_list,
- to_user_ptr(args->buffers_ptr),
- sizeof(*exec2_list) * args->buffer_count);
- if (ret != 0) {
- DRM_DEBUG("copy %d exec entries failed %d\n",
- args->buffer_count, ret);
- drm_free_large(exec2_list);
- return -EFAULT;
- }
- ret = i915_gem_do_execbuffer(dev, data, file, args, exec2_list);
- if (!ret) {
- /* Copy the new buffer offsets back to the user's exec list. */
- struct drm_i915_gem_exec_object2 __user *user_exec_list =
- to_user_ptr(args->buffers_ptr);
- int i;
- for (i = 0; i < args->buffer_count; i++) {
- ret = __copy_to_user(&user_exec_list[i].offset,
- &exec2_list[i].offset,
- sizeof(user_exec_list[i].offset));
- if (ret) {
- ret = -EFAULT;
- DRM_DEBUG("failed to copy %d exec entries "
- "back to user\n",
- args->buffer_count);
- break;
- }
- }
- }
- drm_free_large(exec2_list);
- return ret;
- }
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