![Eric Anholt](/assets/img/avatar_default.png)
Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
2517 lines
65 KiB
C
2517 lines
65 KiB
C
/*
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* Copyright © 2008 Intel Corporation
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Eric Anholt <eric@anholt.net>
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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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#include <linux/swap.h>
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static int
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i915_gem_object_set_domain(struct drm_gem_object *obj,
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uint32_t read_domains,
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uint32_t write_domain);
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static int
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i915_gem_object_set_domain_range(struct drm_gem_object *obj,
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uint64_t offset,
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uint64_t size,
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uint32_t read_domains,
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uint32_t write_domain);
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static int
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i915_gem_set_domain(struct drm_gem_object *obj,
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struct drm_file *file_priv,
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uint32_t read_domains,
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uint32_t write_domain);
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static int i915_gem_object_get_page_list(struct drm_gem_object *obj);
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static void i915_gem_object_free_page_list(struct drm_gem_object *obj);
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static int i915_gem_object_wait_rendering(struct drm_gem_object *obj);
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int
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i915_gem_init_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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drm_i915_private_t *dev_priv = dev->dev_private;
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struct drm_i915_gem_init *args = data;
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mutex_lock(&dev->struct_mutex);
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if (args->gtt_start >= args->gtt_end ||
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(args->gtt_start & (PAGE_SIZE - 1)) != 0 ||
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(args->gtt_end & (PAGE_SIZE - 1)) != 0) {
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mutex_unlock(&dev->struct_mutex);
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return -EINVAL;
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}
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drm_mm_init(&dev_priv->mm.gtt_space, args->gtt_start,
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args->gtt_end - args->gtt_start);
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dev->gtt_total = (uint32_t) (args->gtt_end - args->gtt_start);
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mutex_unlock(&dev->struct_mutex);
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return 0;
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}
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/**
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* Creates a new mm object and returns a handle to it.
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*/
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int
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i915_gem_create_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_i915_gem_create *args = data;
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struct drm_gem_object *obj;
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int handle, ret;
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args->size = roundup(args->size, PAGE_SIZE);
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/* Allocate the new object */
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obj = drm_gem_object_alloc(dev, args->size);
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if (obj == NULL)
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return -ENOMEM;
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ret = drm_gem_handle_create(file_priv, obj, &handle);
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mutex_lock(&dev->struct_mutex);
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drm_gem_object_handle_unreference(obj);
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mutex_unlock(&dev->struct_mutex);
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if (ret)
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return ret;
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args->handle = handle;
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return 0;
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}
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/**
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* Reads data from the object referenced by handle.
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*
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* On error, the contents of *data are undefined.
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*/
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int
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i915_gem_pread_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_i915_gem_pread *args = data;
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struct drm_gem_object *obj;
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struct drm_i915_gem_object *obj_priv;
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ssize_t read;
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loff_t offset;
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int ret;
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obj = drm_gem_object_lookup(dev, file_priv, args->handle);
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if (obj == NULL)
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return -EBADF;
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obj_priv = obj->driver_private;
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/* Bounds check source.
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*
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* XXX: This could use review for overflow issues...
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*/
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if (args->offset > obj->size || args->size > obj->size ||
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args->offset + args->size > obj->size) {
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drm_gem_object_unreference(obj);
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return -EINVAL;
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}
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mutex_lock(&dev->struct_mutex);
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ret = i915_gem_object_set_domain_range(obj, args->offset, args->size,
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I915_GEM_DOMAIN_CPU, 0);
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if (ret != 0) {
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drm_gem_object_unreference(obj);
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mutex_unlock(&dev->struct_mutex);
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}
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offset = args->offset;
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read = vfs_read(obj->filp, (char __user *)(uintptr_t)args->data_ptr,
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args->size, &offset);
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if (read != args->size) {
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drm_gem_object_unreference(obj);
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mutex_unlock(&dev->struct_mutex);
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if (read < 0)
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return read;
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else
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return -EINVAL;
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}
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drm_gem_object_unreference(obj);
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mutex_unlock(&dev->struct_mutex);
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return 0;
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}
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static int
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i915_gem_gtt_pwrite(struct drm_device *dev, struct drm_gem_object *obj,
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struct drm_i915_gem_pwrite *args,
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struct drm_file *file_priv)
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{
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struct drm_i915_gem_object *obj_priv = obj->driver_private;
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ssize_t remain;
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loff_t offset;
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char __user *user_data;
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char __iomem *vaddr;
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char *vaddr_atomic;
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int i, o, l;
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int ret = 0;
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unsigned long pfn;
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unsigned long unwritten;
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user_data = (char __user *) (uintptr_t) args->data_ptr;
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remain = args->size;
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if (!access_ok(VERIFY_READ, user_data, remain))
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return -EFAULT;
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mutex_lock(&dev->struct_mutex);
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ret = i915_gem_object_pin(obj, 0);
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if (ret) {
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mutex_unlock(&dev->struct_mutex);
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return ret;
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}
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ret = i915_gem_set_domain(obj, file_priv,
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I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT);
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if (ret)
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goto fail;
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obj_priv = obj->driver_private;
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offset = obj_priv->gtt_offset + args->offset;
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obj_priv->dirty = 1;
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while (remain > 0) {
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/* Operation in this page
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*
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* i = page number
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* o = offset within page
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* l = bytes to copy
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*/
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i = offset >> PAGE_SHIFT;
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o = offset & (PAGE_SIZE-1);
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l = remain;
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if ((o + l) > PAGE_SIZE)
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l = PAGE_SIZE - o;
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pfn = (dev->agp->base >> PAGE_SHIFT) + i;
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#ifdef CONFIG_HIGHMEM
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/* This is a workaround for the low performance of iounmap
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* (approximate 10% cpu cost on normal 3D workloads).
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* kmap_atomic on HIGHMEM kernels happens to let us map card
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* memory without taking IPIs. When the vmap rework lands
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* we should be able to dump this hack.
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*/
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vaddr_atomic = kmap_atomic_pfn(pfn, KM_USER0);
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#if WATCH_PWRITE
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DRM_INFO("pwrite i %d o %d l %d pfn %ld vaddr %p\n",
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i, o, l, pfn, vaddr_atomic);
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#endif
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unwritten = __copy_from_user_inatomic_nocache(vaddr_atomic + o,
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user_data, l);
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kunmap_atomic(vaddr_atomic, KM_USER0);
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if (unwritten)
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#endif /* CONFIG_HIGHMEM */
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{
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vaddr = ioremap_wc(pfn << PAGE_SHIFT, PAGE_SIZE);
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#if WATCH_PWRITE
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DRM_INFO("pwrite slow i %d o %d l %d "
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"pfn %ld vaddr %p\n",
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i, o, l, pfn, vaddr);
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#endif
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if (vaddr == NULL) {
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ret = -EFAULT;
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goto fail;
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}
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unwritten = __copy_from_user(vaddr + o, user_data, l);
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#if WATCH_PWRITE
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DRM_INFO("unwritten %ld\n", unwritten);
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#endif
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iounmap(vaddr);
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if (unwritten) {
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ret = -EFAULT;
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goto fail;
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}
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}
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remain -= l;
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user_data += l;
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offset += l;
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}
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#if WATCH_PWRITE && 1
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i915_gem_clflush_object(obj);
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i915_gem_dump_object(obj, args->offset + args->size, __func__, ~0);
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i915_gem_clflush_object(obj);
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#endif
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fail:
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i915_gem_object_unpin(obj);
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mutex_unlock(&dev->struct_mutex);
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return ret;
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}
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static int
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i915_gem_shmem_pwrite(struct drm_device *dev, struct drm_gem_object *obj,
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struct drm_i915_gem_pwrite *args,
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struct drm_file *file_priv)
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{
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int ret;
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loff_t offset;
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ssize_t written;
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mutex_lock(&dev->struct_mutex);
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ret = i915_gem_set_domain(obj, file_priv,
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I915_GEM_DOMAIN_CPU, I915_GEM_DOMAIN_CPU);
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if (ret) {
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mutex_unlock(&dev->struct_mutex);
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return ret;
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}
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offset = args->offset;
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written = vfs_write(obj->filp,
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(char __user *)(uintptr_t) args->data_ptr,
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args->size, &offset);
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if (written != args->size) {
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mutex_unlock(&dev->struct_mutex);
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if (written < 0)
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return written;
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else
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return -EINVAL;
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}
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mutex_unlock(&dev->struct_mutex);
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return 0;
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}
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/**
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* Writes data to the object referenced by handle.
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*
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* On error, the contents of the buffer that were to be modified are undefined.
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*/
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int
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i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_i915_gem_pwrite *args = data;
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struct drm_gem_object *obj;
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struct drm_i915_gem_object *obj_priv;
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int ret = 0;
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obj = drm_gem_object_lookup(dev, file_priv, args->handle);
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if (obj == NULL)
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return -EBADF;
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obj_priv = obj->driver_private;
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/* Bounds check destination.
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*
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* XXX: This could use review for overflow issues...
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*/
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if (args->offset > obj->size || args->size > obj->size ||
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args->offset + args->size > obj->size) {
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drm_gem_object_unreference(obj);
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return -EINVAL;
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}
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/* We can only do the GTT pwrite on untiled buffers, as otherwise
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* it would end up going through the fenced access, and we'll get
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* different detiling behavior between reading and writing.
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* pread/pwrite currently are reading and writing from the CPU
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* perspective, requiring manual detiling by the client.
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*/
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if (obj_priv->tiling_mode == I915_TILING_NONE &&
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dev->gtt_total != 0)
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ret = i915_gem_gtt_pwrite(dev, obj, args, file_priv);
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else
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ret = i915_gem_shmem_pwrite(dev, obj, args, file_priv);
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#if WATCH_PWRITE
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if (ret)
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DRM_INFO("pwrite failed %d\n", ret);
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#endif
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drm_gem_object_unreference(obj);
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return ret;
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}
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/**
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* Called when user space prepares to use an object
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*/
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int
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i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_i915_gem_set_domain *args = data;
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struct drm_gem_object *obj;
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int ret;
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if (!(dev->driver->driver_features & DRIVER_GEM))
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return -ENODEV;
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obj = drm_gem_object_lookup(dev, file_priv, args->handle);
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if (obj == NULL)
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return -EBADF;
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mutex_lock(&dev->struct_mutex);
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#if WATCH_BUF
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DRM_INFO("set_domain_ioctl %p(%d), %08x %08x\n",
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obj, obj->size, args->read_domains, args->write_domain);
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#endif
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ret = i915_gem_set_domain(obj, file_priv,
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args->read_domains, args->write_domain);
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drm_gem_object_unreference(obj);
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mutex_unlock(&dev->struct_mutex);
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return ret;
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}
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/**
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* Called when user space has done writes to this buffer
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*/
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int
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i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_i915_gem_sw_finish *args = data;
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struct drm_gem_object *obj;
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struct drm_i915_gem_object *obj_priv;
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int ret = 0;
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if (!(dev->driver->driver_features & DRIVER_GEM))
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return -ENODEV;
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mutex_lock(&dev->struct_mutex);
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obj = drm_gem_object_lookup(dev, file_priv, args->handle);
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if (obj == NULL) {
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mutex_unlock(&dev->struct_mutex);
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return -EBADF;
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}
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#if WATCH_BUF
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DRM_INFO("%s: sw_finish %d (%p %d)\n",
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__func__, args->handle, obj, obj->size);
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#endif
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obj_priv = obj->driver_private;
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/* Pinned buffers may be scanout, so flush the cache */
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if ((obj->write_domain & I915_GEM_DOMAIN_CPU) && obj_priv->pin_count) {
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i915_gem_clflush_object(obj);
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drm_agp_chipset_flush(dev);
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}
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drm_gem_object_unreference(obj);
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mutex_unlock(&dev->struct_mutex);
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return ret;
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}
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/**
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* Maps the contents of an object, returning the address it is mapped
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* into.
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*
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* While the mapping holds a reference on the contents of the object, it doesn't
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* imply a ref on the object itself.
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*/
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int
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i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_i915_gem_mmap *args = data;
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struct drm_gem_object *obj;
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loff_t offset;
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unsigned long addr;
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if (!(dev->driver->driver_features & DRIVER_GEM))
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return -ENODEV;
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obj = drm_gem_object_lookup(dev, file_priv, args->handle);
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if (obj == NULL)
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return -EBADF;
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|
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offset = args->offset;
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down_write(¤t->mm->mmap_sem);
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addr = do_mmap(obj->filp, 0, args->size,
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PROT_READ | PROT_WRITE, MAP_SHARED,
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args->offset);
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up_write(¤t->mm->mmap_sem);
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mutex_lock(&dev->struct_mutex);
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drm_gem_object_unreference(obj);
|
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mutex_unlock(&dev->struct_mutex);
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if (IS_ERR((void *)addr))
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return addr;
|
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|
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args->addr_ptr = (uint64_t) addr;
|
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|
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return 0;
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}
|
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|
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static void
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i915_gem_object_free_page_list(struct drm_gem_object *obj)
|
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{
|
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struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
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int page_count = obj->size / PAGE_SIZE;
|
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int i;
|
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|
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if (obj_priv->page_list == NULL)
|
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return;
|
|
|
|
|
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for (i = 0; i < page_count; i++)
|
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if (obj_priv->page_list[i] != NULL) {
|
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if (obj_priv->dirty)
|
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set_page_dirty(obj_priv->page_list[i]);
|
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mark_page_accessed(obj_priv->page_list[i]);
|
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page_cache_release(obj_priv->page_list[i]);
|
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}
|
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obj_priv->dirty = 0;
|
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|
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drm_free(obj_priv->page_list,
|
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page_count * sizeof(struct page *),
|
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DRM_MEM_DRIVER);
|
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obj_priv->page_list = NULL;
|
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}
|
|
|
|
static void
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i915_gem_object_move_to_active(struct drm_gem_object *obj)
|
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{
|
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struct drm_device *dev = obj->dev;
|
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drm_i915_private_t *dev_priv = dev->dev_private;
|
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struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
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|
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/* Add a reference if we're newly entering the active list. */
|
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if (!obj_priv->active) {
|
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drm_gem_object_reference(obj);
|
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obj_priv->active = 1;
|
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}
|
|
/* Move from whatever list we were on to the tail of execution. */
|
|
list_move_tail(&obj_priv->list,
|
|
&dev_priv->mm.active_list);
|
|
}
|
|
|
|
|
|
static void
|
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i915_gem_object_move_to_inactive(struct drm_gem_object *obj)
|
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{
|
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struct drm_device *dev = obj->dev;
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
|
|
|
i915_verify_inactive(dev, __FILE__, __LINE__);
|
|
if (obj_priv->pin_count != 0)
|
|
list_del_init(&obj_priv->list);
|
|
else
|
|
list_move_tail(&obj_priv->list, &dev_priv->mm.inactive_list);
|
|
|
|
if (obj_priv->active) {
|
|
obj_priv->active = 0;
|
|
drm_gem_object_unreference(obj);
|
|
}
|
|
i915_verify_inactive(dev, __FILE__, __LINE__);
|
|
}
|
|
|
|
/**
|
|
* Creates a new sequence number, emitting a write of it to the status page
|
|
* plus an interrupt, which will trigger i915_user_interrupt_handler.
|
|
*
|
|
* Must be called with struct_lock held.
|
|
*
|
|
* Returned sequence numbers are nonzero on success.
|
|
*/
|
|
static uint32_t
|
|
i915_add_request(struct drm_device *dev, uint32_t flush_domains)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct drm_i915_gem_request *request;
|
|
uint32_t seqno;
|
|
int was_empty;
|
|
RING_LOCALS;
|
|
|
|
request = drm_calloc(1, sizeof(*request), DRM_MEM_DRIVER);
|
|
if (request == NULL)
|
|
return 0;
|
|
|
|
/* Grab the seqno we're going to make this request be, and bump the
|
|
* next (skipping 0 so it can be the reserved no-seqno value).
|
|
*/
|
|
seqno = dev_priv->mm.next_gem_seqno;
|
|
dev_priv->mm.next_gem_seqno++;
|
|
if (dev_priv->mm.next_gem_seqno == 0)
|
|
dev_priv->mm.next_gem_seqno++;
|
|
|
|
BEGIN_LP_RING(4);
|
|
OUT_RING(MI_STORE_DWORD_INDEX);
|
|
OUT_RING(I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
|
|
OUT_RING(seqno);
|
|
|
|
OUT_RING(MI_USER_INTERRUPT);
|
|
ADVANCE_LP_RING();
|
|
|
|
DRM_DEBUG("%d\n", seqno);
|
|
|
|
request->seqno = seqno;
|
|
request->emitted_jiffies = jiffies;
|
|
request->flush_domains = flush_domains;
|
|
was_empty = list_empty(&dev_priv->mm.request_list);
|
|
list_add_tail(&request->list, &dev_priv->mm.request_list);
|
|
|
|
if (was_empty)
|
|
schedule_delayed_work(&dev_priv->mm.retire_work, HZ);
|
|
return seqno;
|
|
}
|
|
|
|
/**
|
|
* Command execution barrier
|
|
*
|
|
* Ensures that all commands in the ring are finished
|
|
* before signalling the CPU
|
|
*/
|
|
static uint32_t
|
|
i915_retire_commands(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
uint32_t cmd = MI_FLUSH | MI_NO_WRITE_FLUSH;
|
|
uint32_t flush_domains = 0;
|
|
RING_LOCALS;
|
|
|
|
/* The sampler always gets flushed on i965 (sigh) */
|
|
if (IS_I965G(dev))
|
|
flush_domains |= I915_GEM_DOMAIN_SAMPLER;
|
|
BEGIN_LP_RING(2);
|
|
OUT_RING(cmd);
|
|
OUT_RING(0); /* noop */
|
|
ADVANCE_LP_RING();
|
|
return flush_domains;
|
|
}
|
|
|
|
/**
|
|
* Moves buffers associated only with the given active seqno from the active
|
|
* to inactive list, potentially freeing them.
|
|
*/
|
|
static void
|
|
i915_gem_retire_request(struct drm_device *dev,
|
|
struct drm_i915_gem_request *request)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
|
|
/* Move any buffers on the active list that are no longer referenced
|
|
* by the ringbuffer to the flushing/inactive lists as appropriate.
|
|
*/
|
|
while (!list_empty(&dev_priv->mm.active_list)) {
|
|
struct drm_gem_object *obj;
|
|
struct drm_i915_gem_object *obj_priv;
|
|
|
|
obj_priv = list_first_entry(&dev_priv->mm.active_list,
|
|
struct drm_i915_gem_object,
|
|
list);
|
|
obj = obj_priv->obj;
|
|
|
|
/* If the seqno being retired doesn't match the oldest in the
|
|
* list, then the oldest in the list must still be newer than
|
|
* this seqno.
|
|
*/
|
|
if (obj_priv->last_rendering_seqno != request->seqno)
|
|
return;
|
|
#if WATCH_LRU
|
|
DRM_INFO("%s: retire %d moves to inactive list %p\n",
|
|
__func__, request->seqno, obj);
|
|
#endif
|
|
|
|
if (obj->write_domain != 0) {
|
|
list_move_tail(&obj_priv->list,
|
|
&dev_priv->mm.flushing_list);
|
|
} else {
|
|
i915_gem_object_move_to_inactive(obj);
|
|
}
|
|
}
|
|
|
|
if (request->flush_domains != 0) {
|
|
struct drm_i915_gem_object *obj_priv, *next;
|
|
|
|
/* Clear the write domain and activity from any buffers
|
|
* that are just waiting for a flush matching the one retired.
|
|
*/
|
|
list_for_each_entry_safe(obj_priv, next,
|
|
&dev_priv->mm.flushing_list, list) {
|
|
struct drm_gem_object *obj = obj_priv->obj;
|
|
|
|
if (obj->write_domain & request->flush_domains) {
|
|
obj->write_domain = 0;
|
|
i915_gem_object_move_to_inactive(obj);
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns true if seq1 is later than seq2.
|
|
*/
|
|
static int
|
|
i915_seqno_passed(uint32_t seq1, uint32_t seq2)
|
|
{
|
|
return (int32_t)(seq1 - seq2) >= 0;
|
|
}
|
|
|
|
uint32_t
|
|
i915_get_gem_seqno(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
|
|
return READ_HWSP(dev_priv, I915_GEM_HWS_INDEX);
|
|
}
|
|
|
|
/**
|
|
* This function clears the request list as sequence numbers are passed.
|
|
*/
|
|
void
|
|
i915_gem_retire_requests(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
uint32_t seqno;
|
|
|
|
seqno = i915_get_gem_seqno(dev);
|
|
|
|
while (!list_empty(&dev_priv->mm.request_list)) {
|
|
struct drm_i915_gem_request *request;
|
|
uint32_t retiring_seqno;
|
|
|
|
request = list_first_entry(&dev_priv->mm.request_list,
|
|
struct drm_i915_gem_request,
|
|
list);
|
|
retiring_seqno = request->seqno;
|
|
|
|
if (i915_seqno_passed(seqno, retiring_seqno) ||
|
|
dev_priv->mm.wedged) {
|
|
i915_gem_retire_request(dev, request);
|
|
|
|
list_del(&request->list);
|
|
drm_free(request, sizeof(*request), DRM_MEM_DRIVER);
|
|
} else
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
i915_gem_retire_work_handler(struct work_struct *work)
|
|
{
|
|
drm_i915_private_t *dev_priv;
|
|
struct drm_device *dev;
|
|
|
|
dev_priv = container_of(work, drm_i915_private_t,
|
|
mm.retire_work.work);
|
|
dev = dev_priv->dev;
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
i915_gem_retire_requests(dev);
|
|
if (!list_empty(&dev_priv->mm.request_list))
|
|
schedule_delayed_work(&dev_priv->mm.retire_work, HZ);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
}
|
|
|
|
/**
|
|
* Waits for a sequence number to be signaled, and cleans up the
|
|
* request and object lists appropriately for that event.
|
|
*/
|
|
static int
|
|
i915_wait_request(struct drm_device *dev, uint32_t seqno)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
int ret = 0;
|
|
|
|
BUG_ON(seqno == 0);
|
|
|
|
if (!i915_seqno_passed(i915_get_gem_seqno(dev), seqno)) {
|
|
dev_priv->mm.waiting_gem_seqno = seqno;
|
|
i915_user_irq_get(dev);
|
|
ret = wait_event_interruptible(dev_priv->irq_queue,
|
|
i915_seqno_passed(i915_get_gem_seqno(dev),
|
|
seqno) ||
|
|
dev_priv->mm.wedged);
|
|
i915_user_irq_put(dev);
|
|
dev_priv->mm.waiting_gem_seqno = 0;
|
|
}
|
|
if (dev_priv->mm.wedged)
|
|
ret = -EIO;
|
|
|
|
if (ret && ret != -ERESTARTSYS)
|
|
DRM_ERROR("%s returns %d (awaiting %d at %d)\n",
|
|
__func__, ret, seqno, i915_get_gem_seqno(dev));
|
|
|
|
/* Directly dispatch request retiring. While we have the work queue
|
|
* to handle this, the waiter on a request often wants an associated
|
|
* buffer to have made it to the inactive list, and we would need
|
|
* a separate wait queue to handle that.
|
|
*/
|
|
if (ret == 0)
|
|
i915_gem_retire_requests(dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
i915_gem_flush(struct drm_device *dev,
|
|
uint32_t invalidate_domains,
|
|
uint32_t flush_domains)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
uint32_t cmd;
|
|
RING_LOCALS;
|
|
|
|
#if WATCH_EXEC
|
|
DRM_INFO("%s: invalidate %08x flush %08x\n", __func__,
|
|
invalidate_domains, flush_domains);
|
|
#endif
|
|
|
|
if (flush_domains & I915_GEM_DOMAIN_CPU)
|
|
drm_agp_chipset_flush(dev);
|
|
|
|
if ((invalidate_domains | flush_domains) & ~(I915_GEM_DOMAIN_CPU |
|
|
I915_GEM_DOMAIN_GTT)) {
|
|
/*
|
|
* read/write caches:
|
|
*
|
|
* I915_GEM_DOMAIN_RENDER is always invalidated, but is
|
|
* only flushed if MI_NO_WRITE_FLUSH is unset. On 965, it is
|
|
* also flushed at 2d versus 3d pipeline switches.
|
|
*
|
|
* read-only caches:
|
|
*
|
|
* I915_GEM_DOMAIN_SAMPLER is flushed on pre-965 if
|
|
* MI_READ_FLUSH is set, and is always flushed on 965.
|
|
*
|
|
* I915_GEM_DOMAIN_COMMAND may not exist?
|
|
*
|
|
* I915_GEM_DOMAIN_INSTRUCTION, which exists on 965, is
|
|
* invalidated when MI_EXE_FLUSH is set.
|
|
*
|
|
* I915_GEM_DOMAIN_VERTEX, which exists on 965, is
|
|
* invalidated with every MI_FLUSH.
|
|
*
|
|
* TLBs:
|
|
*
|
|
* On 965, TLBs associated with I915_GEM_DOMAIN_COMMAND
|
|
* and I915_GEM_DOMAIN_CPU in are invalidated at PTE write and
|
|
* I915_GEM_DOMAIN_RENDER and I915_GEM_DOMAIN_SAMPLER
|
|
* are flushed at any MI_FLUSH.
|
|
*/
|
|
|
|
cmd = MI_FLUSH | MI_NO_WRITE_FLUSH;
|
|
if ((invalidate_domains|flush_domains) &
|
|
I915_GEM_DOMAIN_RENDER)
|
|
cmd &= ~MI_NO_WRITE_FLUSH;
|
|
if (!IS_I965G(dev)) {
|
|
/*
|
|
* On the 965, the sampler cache always gets flushed
|
|
* and this bit is reserved.
|
|
*/
|
|
if (invalidate_domains & I915_GEM_DOMAIN_SAMPLER)
|
|
cmd |= MI_READ_FLUSH;
|
|
}
|
|
if (invalidate_domains & I915_GEM_DOMAIN_INSTRUCTION)
|
|
cmd |= MI_EXE_FLUSH;
|
|
|
|
#if WATCH_EXEC
|
|
DRM_INFO("%s: queue flush %08x to ring\n", __func__, cmd);
|
|
#endif
|
|
BEGIN_LP_RING(2);
|
|
OUT_RING(cmd);
|
|
OUT_RING(0); /* noop */
|
|
ADVANCE_LP_RING();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Ensures that all rendering to the object has completed and the object is
|
|
* safe to unbind from the GTT or access from the CPU.
|
|
*/
|
|
static int
|
|
i915_gem_object_wait_rendering(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
|
int ret;
|
|
|
|
/* If there are writes queued to the buffer, flush and
|
|
* create a new seqno to wait for.
|
|
*/
|
|
if (obj->write_domain & ~(I915_GEM_DOMAIN_CPU|I915_GEM_DOMAIN_GTT)) {
|
|
uint32_t write_domain = obj->write_domain;
|
|
#if WATCH_BUF
|
|
DRM_INFO("%s: flushing object %p from write domain %08x\n",
|
|
__func__, obj, write_domain);
|
|
#endif
|
|
i915_gem_flush(dev, 0, write_domain);
|
|
|
|
i915_gem_object_move_to_active(obj);
|
|
obj_priv->last_rendering_seqno = i915_add_request(dev,
|
|
write_domain);
|
|
BUG_ON(obj_priv->last_rendering_seqno == 0);
|
|
#if WATCH_LRU
|
|
DRM_INFO("%s: flush moves to exec list %p\n", __func__, obj);
|
|
#endif
|
|
}
|
|
|
|
/* If there is rendering queued on the buffer being evicted, wait for
|
|
* it.
|
|
*/
|
|
if (obj_priv->active) {
|
|
#if WATCH_BUF
|
|
DRM_INFO("%s: object %p wait for seqno %08x\n",
|
|
__func__, obj, obj_priv->last_rendering_seqno);
|
|
#endif
|
|
ret = i915_wait_request(dev, obj_priv->last_rendering_seqno);
|
|
if (ret != 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Unbinds an object from the GTT aperture.
|
|
*/
|
|
static int
|
|
i915_gem_object_unbind(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
|
int ret = 0;
|
|
|
|
#if WATCH_BUF
|
|
DRM_INFO("%s:%d %p\n", __func__, __LINE__, obj);
|
|
DRM_INFO("gtt_space %p\n", obj_priv->gtt_space);
|
|
#endif
|
|
if (obj_priv->gtt_space == NULL)
|
|
return 0;
|
|
|
|
if (obj_priv->pin_count != 0) {
|
|
DRM_ERROR("Attempting to unbind pinned buffer\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Wait for any rendering to complete
|
|
*/
|
|
ret = i915_gem_object_wait_rendering(obj);
|
|
if (ret) {
|
|
DRM_ERROR("wait_rendering failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Move the object to the CPU domain to ensure that
|
|
* any possible CPU writes while it's not in the GTT
|
|
* are flushed when we go to remap it. This will
|
|
* also ensure that all pending GPU writes are finished
|
|
* before we unbind.
|
|
*/
|
|
ret = i915_gem_object_set_domain(obj, I915_GEM_DOMAIN_CPU,
|
|
I915_GEM_DOMAIN_CPU);
|
|
if (ret) {
|
|
DRM_ERROR("set_domain failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (obj_priv->agp_mem != NULL) {
|
|
drm_unbind_agp(obj_priv->agp_mem);
|
|
drm_free_agp(obj_priv->agp_mem, obj->size / PAGE_SIZE);
|
|
obj_priv->agp_mem = NULL;
|
|
}
|
|
|
|
BUG_ON(obj_priv->active);
|
|
|
|
i915_gem_object_free_page_list(obj);
|
|
|
|
if (obj_priv->gtt_space) {
|
|
atomic_dec(&dev->gtt_count);
|
|
atomic_sub(obj->size, &dev->gtt_memory);
|
|
|
|
drm_mm_put_block(obj_priv->gtt_space);
|
|
obj_priv->gtt_space = NULL;
|
|
}
|
|
|
|
/* Remove ourselves from the LRU list if present. */
|
|
if (!list_empty(&obj_priv->list))
|
|
list_del_init(&obj_priv->list);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
i915_gem_evict_something(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct drm_gem_object *obj;
|
|
struct drm_i915_gem_object *obj_priv;
|
|
int ret = 0;
|
|
|
|
for (;;) {
|
|
/* If there's an inactive buffer available now, grab it
|
|
* and be done.
|
|
*/
|
|
if (!list_empty(&dev_priv->mm.inactive_list)) {
|
|
obj_priv = list_first_entry(&dev_priv->mm.inactive_list,
|
|
struct drm_i915_gem_object,
|
|
list);
|
|
obj = obj_priv->obj;
|
|
BUG_ON(obj_priv->pin_count != 0);
|
|
#if WATCH_LRU
|
|
DRM_INFO("%s: evicting %p\n", __func__, obj);
|
|
#endif
|
|
BUG_ON(obj_priv->active);
|
|
|
|
/* Wait on the rendering and unbind the buffer. */
|
|
ret = i915_gem_object_unbind(obj);
|
|
break;
|
|
}
|
|
|
|
/* If we didn't get anything, but the ring is still processing
|
|
* things, wait for one of those things to finish and hopefully
|
|
* leave us a buffer to evict.
|
|
*/
|
|
if (!list_empty(&dev_priv->mm.request_list)) {
|
|
struct drm_i915_gem_request *request;
|
|
|
|
request = list_first_entry(&dev_priv->mm.request_list,
|
|
struct drm_i915_gem_request,
|
|
list);
|
|
|
|
ret = i915_wait_request(dev, request->seqno);
|
|
if (ret)
|
|
break;
|
|
|
|
/* if waiting caused an object to become inactive,
|
|
* then loop around and wait for it. Otherwise, we
|
|
* assume that waiting freed and unbound something,
|
|
* so there should now be some space in the GTT
|
|
*/
|
|
if (!list_empty(&dev_priv->mm.inactive_list))
|
|
continue;
|
|
break;
|
|
}
|
|
|
|
/* If we didn't have anything on the request list but there
|
|
* are buffers awaiting a flush, emit one and try again.
|
|
* When we wait on it, those buffers waiting for that flush
|
|
* will get moved to inactive.
|
|
*/
|
|
if (!list_empty(&dev_priv->mm.flushing_list)) {
|
|
obj_priv = list_first_entry(&dev_priv->mm.flushing_list,
|
|
struct drm_i915_gem_object,
|
|
list);
|
|
obj = obj_priv->obj;
|
|
|
|
i915_gem_flush(dev,
|
|
obj->write_domain,
|
|
obj->write_domain);
|
|
i915_add_request(dev, obj->write_domain);
|
|
|
|
obj = NULL;
|
|
continue;
|
|
}
|
|
|
|
DRM_ERROR("inactive empty %d request empty %d "
|
|
"flushing empty %d\n",
|
|
list_empty(&dev_priv->mm.inactive_list),
|
|
list_empty(&dev_priv->mm.request_list),
|
|
list_empty(&dev_priv->mm.flushing_list));
|
|
/* If we didn't do any of the above, there's nothing to be done
|
|
* and we just can't fit it in.
|
|
*/
|
|
return -ENOMEM;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
i915_gem_object_get_page_list(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
|
int page_count, i;
|
|
struct address_space *mapping;
|
|
struct inode *inode;
|
|
struct page *page;
|
|
int ret;
|
|
|
|
if (obj_priv->page_list)
|
|
return 0;
|
|
|
|
/* Get the list of pages out of our struct file. They'll be pinned
|
|
* at this point until we release them.
|
|
*/
|
|
page_count = obj->size / PAGE_SIZE;
|
|
BUG_ON(obj_priv->page_list != NULL);
|
|
obj_priv->page_list = drm_calloc(page_count, sizeof(struct page *),
|
|
DRM_MEM_DRIVER);
|
|
if (obj_priv->page_list == NULL) {
|
|
DRM_ERROR("Faled to allocate page list\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
inode = obj->filp->f_path.dentry->d_inode;
|
|
mapping = inode->i_mapping;
|
|
for (i = 0; i < page_count; i++) {
|
|
page = read_mapping_page(mapping, i, NULL);
|
|
if (IS_ERR(page)) {
|
|
ret = PTR_ERR(page);
|
|
DRM_ERROR("read_mapping_page failed: %d\n", ret);
|
|
i915_gem_object_free_page_list(obj);
|
|
return ret;
|
|
}
|
|
obj_priv->page_list[i] = page;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Finds free space in the GTT aperture and binds the object there.
|
|
*/
|
|
static int
|
|
i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
|
struct drm_mm_node *free_space;
|
|
int page_count, ret;
|
|
|
|
if (alignment == 0)
|
|
alignment = PAGE_SIZE;
|
|
if (alignment & (PAGE_SIZE - 1)) {
|
|
DRM_ERROR("Invalid object alignment requested %u\n", alignment);
|
|
return -EINVAL;
|
|
}
|
|
|
|
search_free:
|
|
free_space = drm_mm_search_free(&dev_priv->mm.gtt_space,
|
|
obj->size, alignment, 0);
|
|
if (free_space != NULL) {
|
|
obj_priv->gtt_space = drm_mm_get_block(free_space, obj->size,
|
|
alignment);
|
|
if (obj_priv->gtt_space != NULL) {
|
|
obj_priv->gtt_space->private = obj;
|
|
obj_priv->gtt_offset = obj_priv->gtt_space->start;
|
|
}
|
|
}
|
|
if (obj_priv->gtt_space == NULL) {
|
|
/* If the gtt is empty and we're still having trouble
|
|
* fitting our object in, we're out of memory.
|
|
*/
|
|
#if WATCH_LRU
|
|
DRM_INFO("%s: GTT full, evicting something\n", __func__);
|
|
#endif
|
|
if (list_empty(&dev_priv->mm.inactive_list) &&
|
|
list_empty(&dev_priv->mm.flushing_list) &&
|
|
list_empty(&dev_priv->mm.active_list)) {
|
|
DRM_ERROR("GTT full, but LRU list empty\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ret = i915_gem_evict_something(dev);
|
|
if (ret != 0) {
|
|
DRM_ERROR("Failed to evict a buffer %d\n", ret);
|
|
return ret;
|
|
}
|
|
goto search_free;
|
|
}
|
|
|
|
#if WATCH_BUF
|
|
DRM_INFO("Binding object of size %d at 0x%08x\n",
|
|
obj->size, obj_priv->gtt_offset);
|
|
#endif
|
|
ret = i915_gem_object_get_page_list(obj);
|
|
if (ret) {
|
|
drm_mm_put_block(obj_priv->gtt_space);
|
|
obj_priv->gtt_space = NULL;
|
|
return ret;
|
|
}
|
|
|
|
page_count = obj->size / PAGE_SIZE;
|
|
/* Create an AGP memory structure pointing at our pages, and bind it
|
|
* into the GTT.
|
|
*/
|
|
obj_priv->agp_mem = drm_agp_bind_pages(dev,
|
|
obj_priv->page_list,
|
|
page_count,
|
|
obj_priv->gtt_offset);
|
|
if (obj_priv->agp_mem == NULL) {
|
|
i915_gem_object_free_page_list(obj);
|
|
drm_mm_put_block(obj_priv->gtt_space);
|
|
obj_priv->gtt_space = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
atomic_inc(&dev->gtt_count);
|
|
atomic_add(obj->size, &dev->gtt_memory);
|
|
|
|
/* Assert that the object is not currently in any GPU domain. As it
|
|
* wasn't in the GTT, there shouldn't be any way it could have been in
|
|
* a GPU cache
|
|
*/
|
|
BUG_ON(obj->read_domains & ~(I915_GEM_DOMAIN_CPU|I915_GEM_DOMAIN_GTT));
|
|
BUG_ON(obj->write_domain & ~(I915_GEM_DOMAIN_CPU|I915_GEM_DOMAIN_GTT));
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
i915_gem_clflush_object(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
|
|
|
/* If we don't have a page list set up, then we're not pinned
|
|
* to GPU, and we can ignore the cache flush because it'll happen
|
|
* again at bind time.
|
|
*/
|
|
if (obj_priv->page_list == NULL)
|
|
return;
|
|
|
|
drm_clflush_pages(obj_priv->page_list, obj->size / PAGE_SIZE);
|
|
}
|
|
|
|
/*
|
|
* Set the next domain for the specified object. This
|
|
* may not actually perform the necessary flushing/invaliding though,
|
|
* as that may want to be batched with other set_domain operations
|
|
*
|
|
* This is (we hope) the only really tricky part of gem. The goal
|
|
* is fairly simple -- track which caches hold bits of the object
|
|
* and make sure they remain coherent. A few concrete examples may
|
|
* help to explain how it works. For shorthand, we use the notation
|
|
* (read_domains, write_domain), e.g. (CPU, CPU) to indicate the
|
|
* a pair of read and write domain masks.
|
|
*
|
|
* Case 1: the batch buffer
|
|
*
|
|
* 1. Allocated
|
|
* 2. Written by CPU
|
|
* 3. Mapped to GTT
|
|
* 4. Read by GPU
|
|
* 5. Unmapped from GTT
|
|
* 6. Freed
|
|
*
|
|
* Let's take these a step at a time
|
|
*
|
|
* 1. Allocated
|
|
* Pages allocated from the kernel may still have
|
|
* cache contents, so we set them to (CPU, CPU) always.
|
|
* 2. Written by CPU (using pwrite)
|
|
* The pwrite function calls set_domain (CPU, CPU) and
|
|
* this function does nothing (as nothing changes)
|
|
* 3. Mapped by GTT
|
|
* This function asserts that the object is not
|
|
* currently in any GPU-based read or write domains
|
|
* 4. Read by GPU
|
|
* i915_gem_execbuffer calls set_domain (COMMAND, 0).
|
|
* As write_domain is zero, this function adds in the
|
|
* current read domains (CPU+COMMAND, 0).
|
|
* flush_domains is set to CPU.
|
|
* invalidate_domains is set to COMMAND
|
|
* clflush is run to get data out of the CPU caches
|
|
* then i915_dev_set_domain calls i915_gem_flush to
|
|
* emit an MI_FLUSH and drm_agp_chipset_flush
|
|
* 5. Unmapped from GTT
|
|
* i915_gem_object_unbind calls set_domain (CPU, CPU)
|
|
* flush_domains and invalidate_domains end up both zero
|
|
* so no flushing/invalidating happens
|
|
* 6. Freed
|
|
* yay, done
|
|
*
|
|
* Case 2: The shared render buffer
|
|
*
|
|
* 1. Allocated
|
|
* 2. Mapped to GTT
|
|
* 3. Read/written by GPU
|
|
* 4. set_domain to (CPU,CPU)
|
|
* 5. Read/written by CPU
|
|
* 6. Read/written by GPU
|
|
*
|
|
* 1. Allocated
|
|
* Same as last example, (CPU, CPU)
|
|
* 2. Mapped to GTT
|
|
* Nothing changes (assertions find that it is not in the GPU)
|
|
* 3. Read/written by GPU
|
|
* execbuffer calls set_domain (RENDER, RENDER)
|
|
* flush_domains gets CPU
|
|
* invalidate_domains gets GPU
|
|
* clflush (obj)
|
|
* MI_FLUSH and drm_agp_chipset_flush
|
|
* 4. set_domain (CPU, CPU)
|
|
* flush_domains gets GPU
|
|
* invalidate_domains gets CPU
|
|
* wait_rendering (obj) to make sure all drawing is complete.
|
|
* This will include an MI_FLUSH to get the data from GPU
|
|
* to memory
|
|
* clflush (obj) to invalidate the CPU cache
|
|
* Another MI_FLUSH in i915_gem_flush (eliminate this somehow?)
|
|
* 5. Read/written by CPU
|
|
* cache lines are loaded and dirtied
|
|
* 6. Read written by GPU
|
|
* Same as last GPU access
|
|
*
|
|
* Case 3: The constant buffer
|
|
*
|
|
* 1. Allocated
|
|
* 2. Written by CPU
|
|
* 3. Read by GPU
|
|
* 4. Updated (written) by CPU again
|
|
* 5. Read by GPU
|
|
*
|
|
* 1. Allocated
|
|
* (CPU, CPU)
|
|
* 2. Written by CPU
|
|
* (CPU, CPU)
|
|
* 3. Read by GPU
|
|
* (CPU+RENDER, 0)
|
|
* flush_domains = CPU
|
|
* invalidate_domains = RENDER
|
|
* clflush (obj)
|
|
* MI_FLUSH
|
|
* drm_agp_chipset_flush
|
|
* 4. Updated (written) by CPU again
|
|
* (CPU, CPU)
|
|
* flush_domains = 0 (no previous write domain)
|
|
* invalidate_domains = 0 (no new read domains)
|
|
* 5. Read by GPU
|
|
* (CPU+RENDER, 0)
|
|
* flush_domains = CPU
|
|
* invalidate_domains = RENDER
|
|
* clflush (obj)
|
|
* MI_FLUSH
|
|
* drm_agp_chipset_flush
|
|
*/
|
|
static int
|
|
i915_gem_object_set_domain(struct drm_gem_object *obj,
|
|
uint32_t read_domains,
|
|
uint32_t write_domain)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
|
uint32_t invalidate_domains = 0;
|
|
uint32_t flush_domains = 0;
|
|
int ret;
|
|
|
|
#if WATCH_BUF
|
|
DRM_INFO("%s: object %p read %08x -> %08x write %08x -> %08x\n",
|
|
__func__, obj,
|
|
obj->read_domains, read_domains,
|
|
obj->write_domain, write_domain);
|
|
#endif
|
|
/*
|
|
* If the object isn't moving to a new write domain,
|
|
* let the object stay in multiple read domains
|
|
*/
|
|
if (write_domain == 0)
|
|
read_domains |= obj->read_domains;
|
|
else
|
|
obj_priv->dirty = 1;
|
|
|
|
/*
|
|
* Flush the current write domain if
|
|
* the new read domains don't match. Invalidate
|
|
* any read domains which differ from the old
|
|
* write domain
|
|
*/
|
|
if (obj->write_domain && obj->write_domain != read_domains) {
|
|
flush_domains |= obj->write_domain;
|
|
invalidate_domains |= read_domains & ~obj->write_domain;
|
|
}
|
|
/*
|
|
* Invalidate any read caches which may have
|
|
* stale data. That is, any new read domains.
|
|
*/
|
|
invalidate_domains |= read_domains & ~obj->read_domains;
|
|
if ((flush_domains | invalidate_domains) & I915_GEM_DOMAIN_CPU) {
|
|
#if WATCH_BUF
|
|
DRM_INFO("%s: CPU domain flush %08x invalidate %08x\n",
|
|
__func__, flush_domains, invalidate_domains);
|
|
#endif
|
|
/*
|
|
* If we're invaliding the CPU cache and flushing a GPU cache,
|
|
* then pause for rendering so that the GPU caches will be
|
|
* flushed before the cpu cache is invalidated
|
|
*/
|
|
if ((invalidate_domains & I915_GEM_DOMAIN_CPU) &&
|
|
(flush_domains & ~(I915_GEM_DOMAIN_CPU |
|
|
I915_GEM_DOMAIN_GTT))) {
|
|
ret = i915_gem_object_wait_rendering(obj);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
i915_gem_clflush_object(obj);
|
|
}
|
|
|
|
if ((write_domain | flush_domains) != 0)
|
|
obj->write_domain = write_domain;
|
|
|
|
/* If we're invalidating the CPU domain, clear the per-page CPU
|
|
* domain list as well.
|
|
*/
|
|
if (obj_priv->page_cpu_valid != NULL &&
|
|
(write_domain != 0 ||
|
|
read_domains & I915_GEM_DOMAIN_CPU)) {
|
|
drm_free(obj_priv->page_cpu_valid, obj->size / PAGE_SIZE,
|
|
DRM_MEM_DRIVER);
|
|
obj_priv->page_cpu_valid = NULL;
|
|
}
|
|
obj->read_domains = read_domains;
|
|
|
|
dev->invalidate_domains |= invalidate_domains;
|
|
dev->flush_domains |= flush_domains;
|
|
#if WATCH_BUF
|
|
DRM_INFO("%s: read %08x write %08x invalidate %08x flush %08x\n",
|
|
__func__,
|
|
obj->read_domains, obj->write_domain,
|
|
dev->invalidate_domains, dev->flush_domains);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Set the read/write domain on a range of the object.
|
|
*
|
|
* Currently only implemented for CPU reads, otherwise drops to normal
|
|
* i915_gem_object_set_domain().
|
|
*/
|
|
static int
|
|
i915_gem_object_set_domain_range(struct drm_gem_object *obj,
|
|
uint64_t offset,
|
|
uint64_t size,
|
|
uint32_t read_domains,
|
|
uint32_t write_domain)
|
|
{
|
|
struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
|
int ret, i;
|
|
|
|
if (obj->read_domains & I915_GEM_DOMAIN_CPU)
|
|
return 0;
|
|
|
|
if (read_domains != I915_GEM_DOMAIN_CPU ||
|
|
write_domain != 0)
|
|
return i915_gem_object_set_domain(obj,
|
|
read_domains, write_domain);
|
|
|
|
/* Wait on any GPU rendering to the object to be flushed. */
|
|
if (obj->write_domain & ~(I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT)) {
|
|
ret = i915_gem_object_wait_rendering(obj);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (obj_priv->page_cpu_valid == NULL) {
|
|
obj_priv->page_cpu_valid = drm_calloc(1, obj->size / PAGE_SIZE,
|
|
DRM_MEM_DRIVER);
|
|
}
|
|
|
|
/* Flush the cache on any pages that are still invalid from the CPU's
|
|
* perspective.
|
|
*/
|
|
for (i = offset / PAGE_SIZE; i <= (offset + size - 1) / PAGE_SIZE; i++) {
|
|
if (obj_priv->page_cpu_valid[i])
|
|
continue;
|
|
|
|
drm_clflush_pages(obj_priv->page_list + i, 1);
|
|
|
|
obj_priv->page_cpu_valid[i] = 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Once all of the objects have been set in the proper domain,
|
|
* perform the necessary flush and invalidate operations.
|
|
*
|
|
* Returns the write domains flushed, for use in flush tracking.
|
|
*/
|
|
static uint32_t
|
|
i915_gem_dev_set_domain(struct drm_device *dev)
|
|
{
|
|
uint32_t flush_domains = dev->flush_domains;
|
|
|
|
/*
|
|
* Now that all the buffers are synced to the proper domains,
|
|
* flush and invalidate the collected domains
|
|
*/
|
|
if (dev->invalidate_domains | dev->flush_domains) {
|
|
#if WATCH_EXEC
|
|
DRM_INFO("%s: invalidate_domains %08x flush_domains %08x\n",
|
|
__func__,
|
|
dev->invalidate_domains,
|
|
dev->flush_domains);
|
|
#endif
|
|
i915_gem_flush(dev,
|
|
dev->invalidate_domains,
|
|
dev->flush_domains);
|
|
dev->invalidate_domains = 0;
|
|
dev->flush_domains = 0;
|
|
}
|
|
|
|
return flush_domains;
|
|
}
|
|
|
|
/**
|
|
* Pin an object to the GTT and evaluate the relocations landing in it.
|
|
*/
|
|
static int
|
|
i915_gem_object_pin_and_relocate(struct drm_gem_object *obj,
|
|
struct drm_file *file_priv,
|
|
struct drm_i915_gem_exec_object *entry)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
struct drm_i915_gem_relocation_entry reloc;
|
|
struct drm_i915_gem_relocation_entry __user *relocs;
|
|
struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
|
int i, ret;
|
|
uint32_t last_reloc_offset = -1;
|
|
void __iomem *reloc_page = NULL;
|
|
|
|
/* Choose the GTT offset for our buffer and put it there. */
|
|
ret = i915_gem_object_pin(obj, (uint32_t) entry->alignment);
|
|
if (ret)
|
|
return ret;
|
|
|
|
entry->offset = obj_priv->gtt_offset;
|
|
|
|
relocs = (struct drm_i915_gem_relocation_entry __user *)
|
|
(uintptr_t) entry->relocs_ptr;
|
|
/* Apply the relocations, using the GTT aperture to avoid cache
|
|
* flushing requirements.
|
|
*/
|
|
for (i = 0; i < entry->relocation_count; i++) {
|
|
struct drm_gem_object *target_obj;
|
|
struct drm_i915_gem_object *target_obj_priv;
|
|
uint32_t reloc_val, reloc_offset;
|
|
uint32_t __iomem *reloc_entry;
|
|
|
|
ret = copy_from_user(&reloc, relocs + i, sizeof(reloc));
|
|
if (ret != 0) {
|
|
i915_gem_object_unpin(obj);
|
|
return ret;
|
|
}
|
|
|
|
target_obj = drm_gem_object_lookup(obj->dev, file_priv,
|
|
reloc.target_handle);
|
|
if (target_obj == NULL) {
|
|
i915_gem_object_unpin(obj);
|
|
return -EBADF;
|
|
}
|
|
target_obj_priv = target_obj->driver_private;
|
|
|
|
/* The target buffer should have appeared before us in the
|
|
* exec_object list, so it should have a GTT space bound by now.
|
|
*/
|
|
if (target_obj_priv->gtt_space == NULL) {
|
|
DRM_ERROR("No GTT space found for object %d\n",
|
|
reloc.target_handle);
|
|
drm_gem_object_unreference(target_obj);
|
|
i915_gem_object_unpin(obj);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (reloc.offset > obj->size - 4) {
|
|
DRM_ERROR("Relocation beyond object bounds: "
|
|
"obj %p target %d offset %d size %d.\n",
|
|
obj, reloc.target_handle,
|
|
(int) reloc.offset, (int) obj->size);
|
|
drm_gem_object_unreference(target_obj);
|
|
i915_gem_object_unpin(obj);
|
|
return -EINVAL;
|
|
}
|
|
if (reloc.offset & 3) {
|
|
DRM_ERROR("Relocation not 4-byte aligned: "
|
|
"obj %p target %d offset %d.\n",
|
|
obj, reloc.target_handle,
|
|
(int) reloc.offset);
|
|
drm_gem_object_unreference(target_obj);
|
|
i915_gem_object_unpin(obj);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (reloc.write_domain && target_obj->pending_write_domain &&
|
|
reloc.write_domain != target_obj->pending_write_domain) {
|
|
DRM_ERROR("Write domain conflict: "
|
|
"obj %p target %d offset %d "
|
|
"new %08x old %08x\n",
|
|
obj, reloc.target_handle,
|
|
(int) reloc.offset,
|
|
reloc.write_domain,
|
|
target_obj->pending_write_domain);
|
|
drm_gem_object_unreference(target_obj);
|
|
i915_gem_object_unpin(obj);
|
|
return -EINVAL;
|
|
}
|
|
|
|
#if WATCH_RELOC
|
|
DRM_INFO("%s: obj %p offset %08x target %d "
|
|
"read %08x write %08x gtt %08x "
|
|
"presumed %08x delta %08x\n",
|
|
__func__,
|
|
obj,
|
|
(int) reloc.offset,
|
|
(int) reloc.target_handle,
|
|
(int) reloc.read_domains,
|
|
(int) reloc.write_domain,
|
|
(int) target_obj_priv->gtt_offset,
|
|
(int) reloc.presumed_offset,
|
|
reloc.delta);
|
|
#endif
|
|
|
|
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_obj_priv->gtt_offset == reloc.presumed_offset) {
|
|
drm_gem_object_unreference(target_obj);
|
|
continue;
|
|
}
|
|
|
|
/* Now that we're going to actually write some data in,
|
|
* make sure that any rendering using this buffer's contents
|
|
* is completed.
|
|
*/
|
|
i915_gem_object_wait_rendering(obj);
|
|
|
|
/* As we're writing through the gtt, flush
|
|
* any CPU writes before we write the relocations
|
|
*/
|
|
if (obj->write_domain & I915_GEM_DOMAIN_CPU) {
|
|
i915_gem_clflush_object(obj);
|
|
drm_agp_chipset_flush(dev);
|
|
obj->write_domain = 0;
|
|
}
|
|
|
|
/* Map the page containing the relocation we're going to
|
|
* perform.
|
|
*/
|
|
reloc_offset = obj_priv->gtt_offset + reloc.offset;
|
|
if (reloc_page == NULL ||
|
|
(last_reloc_offset & ~(PAGE_SIZE - 1)) !=
|
|
(reloc_offset & ~(PAGE_SIZE - 1))) {
|
|
if (reloc_page != NULL)
|
|
iounmap(reloc_page);
|
|
|
|
reloc_page = ioremap_wc(dev->agp->base +
|
|
(reloc_offset &
|
|
~(PAGE_SIZE - 1)),
|
|
PAGE_SIZE);
|
|
last_reloc_offset = reloc_offset;
|
|
if (reloc_page == NULL) {
|
|
drm_gem_object_unreference(target_obj);
|
|
i915_gem_object_unpin(obj);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
reloc_entry = (uint32_t __iomem *)(reloc_page +
|
|
(reloc_offset & (PAGE_SIZE - 1)));
|
|
reloc_val = target_obj_priv->gtt_offset + reloc.delta;
|
|
|
|
#if WATCH_BUF
|
|
DRM_INFO("Applied relocation: %p@0x%08x %08x -> %08x\n",
|
|
obj, (unsigned int) reloc.offset,
|
|
readl(reloc_entry), reloc_val);
|
|
#endif
|
|
writel(reloc_val, reloc_entry);
|
|
|
|
/* Write the updated presumed offset for this entry back out
|
|
* to the user.
|
|
*/
|
|
reloc.presumed_offset = target_obj_priv->gtt_offset;
|
|
ret = copy_to_user(relocs + i, &reloc, sizeof(reloc));
|
|
if (ret != 0) {
|
|
drm_gem_object_unreference(target_obj);
|
|
i915_gem_object_unpin(obj);
|
|
return ret;
|
|
}
|
|
|
|
drm_gem_object_unreference(target_obj);
|
|
}
|
|
|
|
if (reloc_page != NULL)
|
|
iounmap(reloc_page);
|
|
|
|
#if WATCH_BUF
|
|
if (0)
|
|
i915_gem_dump_object(obj, 128, __func__, ~0);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
/** Dispatch a batchbuffer to the ring
|
|
*/
|
|
static int
|
|
i915_dispatch_gem_execbuffer(struct drm_device *dev,
|
|
struct drm_i915_gem_execbuffer *exec,
|
|
uint64_t exec_offset)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct drm_clip_rect __user *boxes = (struct drm_clip_rect __user *)
|
|
(uintptr_t) exec->cliprects_ptr;
|
|
int nbox = exec->num_cliprects;
|
|
int i = 0, count;
|
|
uint32_t exec_start, exec_len;
|
|
RING_LOCALS;
|
|
|
|
exec_start = (uint32_t) exec_offset + exec->batch_start_offset;
|
|
exec_len = (uint32_t) exec->batch_len;
|
|
|
|
if ((exec_start | exec_len) & 0x7) {
|
|
DRM_ERROR("alignment\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!exec_start)
|
|
return -EINVAL;
|
|
|
|
count = nbox ? nbox : 1;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
if (i < nbox) {
|
|
int ret = i915_emit_box(dev, boxes, i,
|
|
exec->DR1, exec->DR4);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (IS_I830(dev) || IS_845G(dev)) {
|
|
BEGIN_LP_RING(4);
|
|
OUT_RING(MI_BATCH_BUFFER);
|
|
OUT_RING(exec_start | MI_BATCH_NON_SECURE);
|
|
OUT_RING(exec_start + exec_len - 4);
|
|
OUT_RING(0);
|
|
ADVANCE_LP_RING();
|
|
} else {
|
|
BEGIN_LP_RING(2);
|
|
if (IS_I965G(dev)) {
|
|
OUT_RING(MI_BATCH_BUFFER_START |
|
|
(2 << 6) |
|
|
MI_BATCH_NON_SECURE_I965);
|
|
OUT_RING(exec_start);
|
|
} else {
|
|
OUT_RING(MI_BATCH_BUFFER_START |
|
|
(2 << 6));
|
|
OUT_RING(exec_start | MI_BATCH_NON_SECURE);
|
|
}
|
|
ADVANCE_LP_RING();
|
|
}
|
|
}
|
|
|
|
/* XXX breadcrumb */
|
|
return 0;
|
|
}
|
|
|
|
/* Throttle our rendering by waiting until the ring has completed our requests
|
|
* emitted over 20 msec ago.
|
|
*
|
|
* This should get us reasonable parallelism between CPU and GPU but also
|
|
* relatively low latency when blocking on a particular request to finish.
|
|
*/
|
|
static int
|
|
i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file_priv)
|
|
{
|
|
struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv;
|
|
int ret = 0;
|
|
uint32_t seqno;
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
seqno = i915_file_priv->mm.last_gem_throttle_seqno;
|
|
i915_file_priv->mm.last_gem_throttle_seqno =
|
|
i915_file_priv->mm.last_gem_seqno;
|
|
if (seqno)
|
|
ret = i915_wait_request(dev, seqno);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
i915_gem_execbuffer(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv;
|
|
struct drm_i915_gem_execbuffer *args = data;
|
|
struct drm_i915_gem_exec_object *exec_list = NULL;
|
|
struct drm_gem_object **object_list = NULL;
|
|
struct drm_gem_object *batch_obj;
|
|
int ret, i, pinned = 0;
|
|
uint64_t exec_offset;
|
|
uint32_t seqno, flush_domains;
|
|
|
|
#if WATCH_EXEC
|
|
DRM_INFO("buffers_ptr %d buffer_count %d len %08x\n",
|
|
(int) args->buffers_ptr, args->buffer_count, args->batch_len);
|
|
#endif
|
|
|
|
if (args->buffer_count < 1) {
|
|
DRM_ERROR("execbuf with %d buffers\n", args->buffer_count);
|
|
return -EINVAL;
|
|
}
|
|
/* Copy in the exec list from userland */
|
|
exec_list = drm_calloc(sizeof(*exec_list), args->buffer_count,
|
|
DRM_MEM_DRIVER);
|
|
object_list = drm_calloc(sizeof(*object_list), args->buffer_count,
|
|
DRM_MEM_DRIVER);
|
|
if (exec_list == NULL || object_list == NULL) {
|
|
DRM_ERROR("Failed to allocate exec or object list "
|
|
"for %d buffers\n",
|
|
args->buffer_count);
|
|
ret = -ENOMEM;
|
|
goto pre_mutex_err;
|
|
}
|
|
ret = copy_from_user(exec_list,
|
|
(struct drm_i915_relocation_entry __user *)
|
|
(uintptr_t) args->buffers_ptr,
|
|
sizeof(*exec_list) * args->buffer_count);
|
|
if (ret != 0) {
|
|
DRM_ERROR("copy %d exec entries failed %d\n",
|
|
args->buffer_count, ret);
|
|
goto pre_mutex_err;
|
|
}
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
|
|
i915_verify_inactive(dev, __FILE__, __LINE__);
|
|
|
|
if (dev_priv->mm.wedged) {
|
|
DRM_ERROR("Execbuf while wedged\n");
|
|
mutex_unlock(&dev->struct_mutex);
|
|
return -EIO;
|
|
}
|
|
|
|
if (dev_priv->mm.suspended) {
|
|
DRM_ERROR("Execbuf while VT-switched.\n");
|
|
mutex_unlock(&dev->struct_mutex);
|
|
return -EBUSY;
|
|
}
|
|
|
|
/* Zero the gloabl flush/invalidate flags. These
|
|
* will be modified as each object is bound to the
|
|
* gtt
|
|
*/
|
|
dev->invalidate_domains = 0;
|
|
dev->flush_domains = 0;
|
|
|
|
/* Look up object handles and perform the relocations */
|
|
for (i = 0; i < args->buffer_count; i++) {
|
|
object_list[i] = drm_gem_object_lookup(dev, file_priv,
|
|
exec_list[i].handle);
|
|
if (object_list[i] == NULL) {
|
|
DRM_ERROR("Invalid object handle %d at index %d\n",
|
|
exec_list[i].handle, i);
|
|
ret = -EBADF;
|
|
goto err;
|
|
}
|
|
|
|
object_list[i]->pending_read_domains = 0;
|
|
object_list[i]->pending_write_domain = 0;
|
|
ret = i915_gem_object_pin_and_relocate(object_list[i],
|
|
file_priv,
|
|
&exec_list[i]);
|
|
if (ret) {
|
|
DRM_ERROR("object bind and relocate failed %d\n", ret);
|
|
goto err;
|
|
}
|
|
pinned = i + 1;
|
|
}
|
|
|
|
/* Set the pending read domains for the batch buffer to COMMAND */
|
|
batch_obj = object_list[args->buffer_count-1];
|
|
batch_obj->pending_read_domains = I915_GEM_DOMAIN_COMMAND;
|
|
batch_obj->pending_write_domain = 0;
|
|
|
|
i915_verify_inactive(dev, __FILE__, __LINE__);
|
|
|
|
for (i = 0; i < args->buffer_count; i++) {
|
|
struct drm_gem_object *obj = object_list[i];
|
|
struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
|
|
|
if (obj_priv->gtt_space == NULL) {
|
|
/* We evicted the buffer in the process of validating
|
|
* our set of buffers in. We could try to recover by
|
|
* kicking them everything out and trying again from
|
|
* the start.
|
|
*/
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
/* make sure all previous memory operations have passed */
|
|
ret = i915_gem_object_set_domain(obj,
|
|
obj->pending_read_domains,
|
|
obj->pending_write_domain);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
|
|
i915_verify_inactive(dev, __FILE__, __LINE__);
|
|
|
|
/* Flush/invalidate caches and chipset buffer */
|
|
flush_domains = i915_gem_dev_set_domain(dev);
|
|
|
|
i915_verify_inactive(dev, __FILE__, __LINE__);
|
|
|
|
#if WATCH_COHERENCY
|
|
for (i = 0; i < args->buffer_count; i++) {
|
|
i915_gem_object_check_coherency(object_list[i],
|
|
exec_list[i].handle);
|
|
}
|
|
#endif
|
|
|
|
exec_offset = exec_list[args->buffer_count - 1].offset;
|
|
|
|
#if WATCH_EXEC
|
|
i915_gem_dump_object(object_list[args->buffer_count - 1],
|
|
args->batch_len,
|
|
__func__,
|
|
~0);
|
|
#endif
|
|
|
|
(void)i915_add_request(dev, flush_domains);
|
|
|
|
/* Exec the batchbuffer */
|
|
ret = i915_dispatch_gem_execbuffer(dev, args, exec_offset);
|
|
if (ret) {
|
|
DRM_ERROR("dispatch failed %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Ensure that the commands in the batch buffer are
|
|
* finished before the interrupt fires
|
|
*/
|
|
flush_domains = i915_retire_commands(dev);
|
|
|
|
i915_verify_inactive(dev, __FILE__, __LINE__);
|
|
|
|
/*
|
|
* Get a seqno representing the execution of the current buffer,
|
|
* which we can wait on. We would like to mitigate these interrupts,
|
|
* likely by only creating seqnos occasionally (so that we have
|
|
* *some* interrupts representing completion of buffers that we can
|
|
* wait on when trying to clear up gtt space).
|
|
*/
|
|
seqno = i915_add_request(dev, flush_domains);
|
|
BUG_ON(seqno == 0);
|
|
i915_file_priv->mm.last_gem_seqno = seqno;
|
|
for (i = 0; i < args->buffer_count; i++) {
|
|
struct drm_gem_object *obj = object_list[i];
|
|
struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
|
|
|
i915_gem_object_move_to_active(obj);
|
|
obj_priv->last_rendering_seqno = seqno;
|
|
#if WATCH_LRU
|
|
DRM_INFO("%s: move to exec list %p\n", __func__, obj);
|
|
#endif
|
|
}
|
|
#if WATCH_LRU
|
|
i915_dump_lru(dev, __func__);
|
|
#endif
|
|
|
|
i915_verify_inactive(dev, __FILE__, __LINE__);
|
|
|
|
/* Copy the new buffer offsets back to the user's exec list. */
|
|
ret = copy_to_user((struct drm_i915_relocation_entry __user *)
|
|
(uintptr_t) args->buffers_ptr,
|
|
exec_list,
|
|
sizeof(*exec_list) * args->buffer_count);
|
|
if (ret)
|
|
DRM_ERROR("failed to copy %d exec entries "
|
|
"back to user (%d)\n",
|
|
args->buffer_count, ret);
|
|
err:
|
|
if (object_list != NULL) {
|
|
for (i = 0; i < pinned; i++)
|
|
i915_gem_object_unpin(object_list[i]);
|
|
|
|
for (i = 0; i < args->buffer_count; i++)
|
|
drm_gem_object_unreference(object_list[i]);
|
|
}
|
|
mutex_unlock(&dev->struct_mutex);
|
|
|
|
pre_mutex_err:
|
|
drm_free(object_list, sizeof(*object_list) * args->buffer_count,
|
|
DRM_MEM_DRIVER);
|
|
drm_free(exec_list, sizeof(*exec_list) * args->buffer_count,
|
|
DRM_MEM_DRIVER);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
i915_gem_object_pin(struct drm_gem_object *obj, uint32_t alignment)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
|
int ret;
|
|
|
|
i915_verify_inactive(dev, __FILE__, __LINE__);
|
|
if (obj_priv->gtt_space == NULL) {
|
|
ret = i915_gem_object_bind_to_gtt(obj, alignment);
|
|
if (ret != 0) {
|
|
DRM_ERROR("Failure to bind: %d", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
obj_priv->pin_count++;
|
|
|
|
/* If the object is not active and not pending a flush,
|
|
* remove it from the inactive list
|
|
*/
|
|
if (obj_priv->pin_count == 1) {
|
|
atomic_inc(&dev->pin_count);
|
|
atomic_add(obj->size, &dev->pin_memory);
|
|
if (!obj_priv->active &&
|
|
(obj->write_domain & ~(I915_GEM_DOMAIN_CPU |
|
|
I915_GEM_DOMAIN_GTT)) == 0 &&
|
|
!list_empty(&obj_priv->list))
|
|
list_del_init(&obj_priv->list);
|
|
}
|
|
i915_verify_inactive(dev, __FILE__, __LINE__);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
i915_gem_object_unpin(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
|
|
|
i915_verify_inactive(dev, __FILE__, __LINE__);
|
|
obj_priv->pin_count--;
|
|
BUG_ON(obj_priv->pin_count < 0);
|
|
BUG_ON(obj_priv->gtt_space == NULL);
|
|
|
|
/* If the object is no longer pinned, and is
|
|
* neither active nor being flushed, then stick it on
|
|
* the inactive list
|
|
*/
|
|
if (obj_priv->pin_count == 0) {
|
|
if (!obj_priv->active &&
|
|
(obj->write_domain & ~(I915_GEM_DOMAIN_CPU |
|
|
I915_GEM_DOMAIN_GTT)) == 0)
|
|
list_move_tail(&obj_priv->list,
|
|
&dev_priv->mm.inactive_list);
|
|
atomic_dec(&dev->pin_count);
|
|
atomic_sub(obj->size, &dev->pin_memory);
|
|
}
|
|
i915_verify_inactive(dev, __FILE__, __LINE__);
|
|
}
|
|
|
|
int
|
|
i915_gem_pin_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_i915_gem_pin *args = data;
|
|
struct drm_gem_object *obj;
|
|
struct drm_i915_gem_object *obj_priv;
|
|
int ret;
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
|
|
obj = drm_gem_object_lookup(dev, file_priv, args->handle);
|
|
if (obj == NULL) {
|
|
DRM_ERROR("Bad handle in i915_gem_pin_ioctl(): %d\n",
|
|
args->handle);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
return -EBADF;
|
|
}
|
|
obj_priv = obj->driver_private;
|
|
|
|
ret = i915_gem_object_pin(obj, args->alignment);
|
|
if (ret != 0) {
|
|
drm_gem_object_unreference(obj);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
return ret;
|
|
}
|
|
|
|
/* XXX - flush the CPU caches for pinned objects
|
|
* as the X server doesn't manage domains yet
|
|
*/
|
|
if (obj->write_domain & I915_GEM_DOMAIN_CPU) {
|
|
i915_gem_clflush_object(obj);
|
|
drm_agp_chipset_flush(dev);
|
|
obj->write_domain = 0;
|
|
}
|
|
args->offset = obj_priv->gtt_offset;
|
|
drm_gem_object_unreference(obj);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
i915_gem_unpin_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_i915_gem_pin *args = data;
|
|
struct drm_gem_object *obj;
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
|
|
obj = drm_gem_object_lookup(dev, file_priv, args->handle);
|
|
if (obj == NULL) {
|
|
DRM_ERROR("Bad handle in i915_gem_unpin_ioctl(): %d\n",
|
|
args->handle);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
return -EBADF;
|
|
}
|
|
|
|
i915_gem_object_unpin(obj);
|
|
|
|
drm_gem_object_unreference(obj);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
i915_gem_busy_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_i915_gem_busy *args = data;
|
|
struct drm_gem_object *obj;
|
|
struct drm_i915_gem_object *obj_priv;
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
obj = drm_gem_object_lookup(dev, file_priv, args->handle);
|
|
if (obj == NULL) {
|
|
DRM_ERROR("Bad handle in i915_gem_busy_ioctl(): %d\n",
|
|
args->handle);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
return -EBADF;
|
|
}
|
|
|
|
obj_priv = obj->driver_private;
|
|
args->busy = obj_priv->active;
|
|
|
|
drm_gem_object_unreference(obj);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
i915_gem_throttle_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
return i915_gem_ring_throttle(dev, file_priv);
|
|
}
|
|
|
|
int i915_gem_init_object(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_i915_gem_object *obj_priv;
|
|
|
|
obj_priv = drm_calloc(1, sizeof(*obj_priv), DRM_MEM_DRIVER);
|
|
if (obj_priv == NULL)
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
* We've just allocated pages from the kernel,
|
|
* so they've just been written by the CPU with
|
|
* zeros. They'll need to be clflushed before we
|
|
* use them with the GPU.
|
|
*/
|
|
obj->write_domain = I915_GEM_DOMAIN_CPU;
|
|
obj->read_domains = I915_GEM_DOMAIN_CPU;
|
|
|
|
obj->driver_private = obj_priv;
|
|
obj_priv->obj = obj;
|
|
INIT_LIST_HEAD(&obj_priv->list);
|
|
return 0;
|
|
}
|
|
|
|
void i915_gem_free_object(struct drm_gem_object *obj)
|
|
{
|
|
struct drm_i915_gem_object *obj_priv = obj->driver_private;
|
|
|
|
while (obj_priv->pin_count > 0)
|
|
i915_gem_object_unpin(obj);
|
|
|
|
i915_gem_object_unbind(obj);
|
|
|
|
drm_free(obj_priv->page_cpu_valid, 1, DRM_MEM_DRIVER);
|
|
drm_free(obj->driver_private, 1, DRM_MEM_DRIVER);
|
|
}
|
|
|
|
static int
|
|
i915_gem_set_domain(struct drm_gem_object *obj,
|
|
struct drm_file *file_priv,
|
|
uint32_t read_domains,
|
|
uint32_t write_domain)
|
|
{
|
|
struct drm_device *dev = obj->dev;
|
|
int ret;
|
|
uint32_t flush_domains;
|
|
|
|
BUG_ON(!mutex_is_locked(&dev->struct_mutex));
|
|
|
|
ret = i915_gem_object_set_domain(obj, read_domains, write_domain);
|
|
if (ret)
|
|
return ret;
|
|
flush_domains = i915_gem_dev_set_domain(obj->dev);
|
|
|
|
if (flush_domains & ~(I915_GEM_DOMAIN_CPU|I915_GEM_DOMAIN_GTT))
|
|
(void) i915_add_request(dev, flush_domains);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/** Unbinds all objects that are on the given buffer list. */
|
|
static int
|
|
i915_gem_evict_from_list(struct drm_device *dev, struct list_head *head)
|
|
{
|
|
struct drm_gem_object *obj;
|
|
struct drm_i915_gem_object *obj_priv;
|
|
int ret;
|
|
|
|
while (!list_empty(head)) {
|
|
obj_priv = list_first_entry(head,
|
|
struct drm_i915_gem_object,
|
|
list);
|
|
obj = obj_priv->obj;
|
|
|
|
if (obj_priv->pin_count != 0) {
|
|
DRM_ERROR("Pinned object in unbind list\n");
|
|
mutex_unlock(&dev->struct_mutex);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = i915_gem_object_unbind(obj);
|
|
if (ret != 0) {
|
|
DRM_ERROR("Error unbinding object in LeaveVT: %d\n",
|
|
ret);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
i915_gem_idle(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
uint32_t seqno, cur_seqno, last_seqno;
|
|
int stuck, ret;
|
|
|
|
if (dev_priv->mm.suspended)
|
|
return 0;
|
|
|
|
/* Hack! Don't let anybody do execbuf while we don't control the chip.
|
|
* We need to replace this with a semaphore, or something.
|
|
*/
|
|
dev_priv->mm.suspended = 1;
|
|
|
|
i915_kernel_lost_context(dev);
|
|
|
|
/* Flush the GPU along with all non-CPU write domains
|
|
*/
|
|
i915_gem_flush(dev, ~(I915_GEM_DOMAIN_CPU|I915_GEM_DOMAIN_GTT),
|
|
~(I915_GEM_DOMAIN_CPU|I915_GEM_DOMAIN_GTT));
|
|
seqno = i915_add_request(dev, ~(I915_GEM_DOMAIN_CPU |
|
|
I915_GEM_DOMAIN_GTT));
|
|
|
|
if (seqno == 0) {
|
|
mutex_unlock(&dev->struct_mutex);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dev_priv->mm.waiting_gem_seqno = seqno;
|
|
last_seqno = 0;
|
|
stuck = 0;
|
|
for (;;) {
|
|
cur_seqno = i915_get_gem_seqno(dev);
|
|
if (i915_seqno_passed(cur_seqno, seqno))
|
|
break;
|
|
if (last_seqno == cur_seqno) {
|
|
if (stuck++ > 100) {
|
|
DRM_ERROR("hardware wedged\n");
|
|
dev_priv->mm.wedged = 1;
|
|
DRM_WAKEUP(&dev_priv->irq_queue);
|
|
break;
|
|
}
|
|
}
|
|
msleep(10);
|
|
last_seqno = cur_seqno;
|
|
}
|
|
dev_priv->mm.waiting_gem_seqno = 0;
|
|
|
|
i915_gem_retire_requests(dev);
|
|
|
|
/* Active and flushing should now be empty as we've
|
|
* waited for a sequence higher than any pending execbuffer
|
|
*/
|
|
BUG_ON(!list_empty(&dev_priv->mm.active_list));
|
|
BUG_ON(!list_empty(&dev_priv->mm.flushing_list));
|
|
|
|
/* Request should now be empty as we've also waited
|
|
* for the last request in the list
|
|
*/
|
|
BUG_ON(!list_empty(&dev_priv->mm.request_list));
|
|
|
|
/* Move all buffers out of the GTT. */
|
|
ret = i915_gem_evict_from_list(dev, &dev_priv->mm.inactive_list);
|
|
if (ret)
|
|
return ret;
|
|
|
|
BUG_ON(!list_empty(&dev_priv->mm.active_list));
|
|
BUG_ON(!list_empty(&dev_priv->mm.flushing_list));
|
|
BUG_ON(!list_empty(&dev_priv->mm.inactive_list));
|
|
BUG_ON(!list_empty(&dev_priv->mm.request_list));
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
i915_gem_init_hws(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct drm_gem_object *obj;
|
|
struct drm_i915_gem_object *obj_priv;
|
|
int ret;
|
|
|
|
/* If we need a physical address for the status page, it's already
|
|
* initialized at driver load time.
|
|
*/
|
|
if (!I915_NEED_GFX_HWS(dev))
|
|
return 0;
|
|
|
|
obj = drm_gem_object_alloc(dev, 4096);
|
|
if (obj == NULL) {
|
|
DRM_ERROR("Failed to allocate status page\n");
|
|
return -ENOMEM;
|
|
}
|
|
obj_priv = obj->driver_private;
|
|
|
|
ret = i915_gem_object_pin(obj, 4096);
|
|
if (ret != 0) {
|
|
drm_gem_object_unreference(obj);
|
|
return ret;
|
|
}
|
|
|
|
dev_priv->status_gfx_addr = obj_priv->gtt_offset;
|
|
dev_priv->hws_map.offset = dev->agp->base + obj_priv->gtt_offset;
|
|
dev_priv->hws_map.size = 4096;
|
|
dev_priv->hws_map.type = 0;
|
|
dev_priv->hws_map.flags = 0;
|
|
dev_priv->hws_map.mtrr = 0;
|
|
|
|
/* Ioremapping here is the wrong thing to do. We want cached access.
|
|
*/
|
|
drm_core_ioremap_wc(&dev_priv->hws_map, dev);
|
|
if (dev_priv->hws_map.handle == NULL) {
|
|
DRM_ERROR("Failed to map status page.\n");
|
|
memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map));
|
|
drm_gem_object_unreference(obj);
|
|
return -EINVAL;
|
|
}
|
|
dev_priv->hws_obj = obj;
|
|
dev_priv->hw_status_page = dev_priv->hws_map.handle;
|
|
memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
|
|
I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
|
|
DRM_DEBUG("hws offset: 0x%08x\n", dev_priv->status_gfx_addr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
i915_gem_init_ringbuffer(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
struct drm_gem_object *obj;
|
|
struct drm_i915_gem_object *obj_priv;
|
|
int ret;
|
|
|
|
ret = i915_gem_init_hws(dev);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
obj = drm_gem_object_alloc(dev, 128 * 1024);
|
|
if (obj == NULL) {
|
|
DRM_ERROR("Failed to allocate ringbuffer\n");
|
|
return -ENOMEM;
|
|
}
|
|
obj_priv = obj->driver_private;
|
|
|
|
ret = i915_gem_object_pin(obj, 4096);
|
|
if (ret != 0) {
|
|
drm_gem_object_unreference(obj);
|
|
return ret;
|
|
}
|
|
|
|
/* Set up the kernel mapping for the ring. */
|
|
dev_priv->ring.Size = obj->size;
|
|
dev_priv->ring.tail_mask = obj->size - 1;
|
|
|
|
dev_priv->ring.map.offset = dev->agp->base + obj_priv->gtt_offset;
|
|
dev_priv->ring.map.size = obj->size;
|
|
dev_priv->ring.map.type = 0;
|
|
dev_priv->ring.map.flags = 0;
|
|
dev_priv->ring.map.mtrr = 0;
|
|
|
|
drm_core_ioremap_wc(&dev_priv->ring.map, dev);
|
|
if (dev_priv->ring.map.handle == NULL) {
|
|
DRM_ERROR("Failed to map ringbuffer.\n");
|
|
memset(&dev_priv->ring, 0, sizeof(dev_priv->ring));
|
|
drm_gem_object_unreference(obj);
|
|
return -EINVAL;
|
|
}
|
|
dev_priv->ring.ring_obj = obj;
|
|
dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
|
|
|
|
/* Stop the ring if it's running. */
|
|
I915_WRITE(PRB0_CTL, 0);
|
|
I915_WRITE(PRB0_HEAD, 0);
|
|
I915_WRITE(PRB0_TAIL, 0);
|
|
I915_WRITE(PRB0_START, 0);
|
|
|
|
/* Initialize the ring. */
|
|
I915_WRITE(PRB0_START, obj_priv->gtt_offset);
|
|
I915_WRITE(PRB0_CTL,
|
|
((obj->size - 4096) & RING_NR_PAGES) |
|
|
RING_NO_REPORT |
|
|
RING_VALID);
|
|
|
|
/* Update our cache of the ring state */
|
|
i915_kernel_lost_context(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
i915_gem_cleanup_ringbuffer(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
|
|
if (dev_priv->ring.ring_obj == NULL)
|
|
return;
|
|
|
|
drm_core_ioremapfree(&dev_priv->ring.map, dev);
|
|
|
|
i915_gem_object_unpin(dev_priv->ring.ring_obj);
|
|
drm_gem_object_unreference(dev_priv->ring.ring_obj);
|
|
dev_priv->ring.ring_obj = NULL;
|
|
memset(&dev_priv->ring, 0, sizeof(dev_priv->ring));
|
|
|
|
if (dev_priv->hws_obj != NULL) {
|
|
i915_gem_object_unpin(dev_priv->hws_obj);
|
|
drm_gem_object_unreference(dev_priv->hws_obj);
|
|
dev_priv->hws_obj = NULL;
|
|
memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map));
|
|
|
|
/* Write high address into HWS_PGA when disabling. */
|
|
I915_WRITE(HWS_PGA, 0x1ffff000);
|
|
}
|
|
}
|
|
|
|
int
|
|
i915_gem_entervt_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
int ret;
|
|
|
|
if (dev_priv->mm.wedged) {
|
|
DRM_ERROR("Reenabling wedged hardware, good luck\n");
|
|
dev_priv->mm.wedged = 0;
|
|
}
|
|
|
|
ret = i915_gem_init_ringbuffer(dev);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
BUG_ON(!list_empty(&dev_priv->mm.active_list));
|
|
BUG_ON(!list_empty(&dev_priv->mm.flushing_list));
|
|
BUG_ON(!list_empty(&dev_priv->mm.inactive_list));
|
|
BUG_ON(!list_empty(&dev_priv->mm.request_list));
|
|
dev_priv->mm.suspended = 0;
|
|
mutex_unlock(&dev->struct_mutex);
|
|
|
|
drm_irq_install(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
i915_gem_leavevt_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
ret = i915_gem_idle(dev);
|
|
if (ret == 0)
|
|
i915_gem_cleanup_ringbuffer(dev);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
|
|
drm_irq_uninstall(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
i915_gem_lastclose(struct drm_device *dev)
|
|
{
|
|
int ret;
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
|
|
if (dev_priv->ring.ring_obj != NULL) {
|
|
ret = i915_gem_idle(dev);
|
|
if (ret)
|
|
DRM_ERROR("failed to idle hardware: %d\n", ret);
|
|
|
|
i915_gem_cleanup_ringbuffer(dev);
|
|
}
|
|
|
|
mutex_unlock(&dev->struct_mutex);
|
|
}
|
|
|
|
void
|
|
i915_gem_load(struct drm_device *dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
|
|
INIT_LIST_HEAD(&dev_priv->mm.active_list);
|
|
INIT_LIST_HEAD(&dev_priv->mm.flushing_list);
|
|
INIT_LIST_HEAD(&dev_priv->mm.inactive_list);
|
|
INIT_LIST_HEAD(&dev_priv->mm.request_list);
|
|
INIT_DELAYED_WORK(&dev_priv->mm.retire_work,
|
|
i915_gem_retire_work_handler);
|
|
INIT_WORK(&dev_priv->mm.vblank_work,
|
|
i915_gem_vblank_work_handler);
|
|
dev_priv->mm.next_gem_seqno = 1;
|
|
|
|
i915_gem_detect_bit_6_swizzle(dev);
|
|
}
|