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freebsd-dev/sys/dev/drm2/i915/i915_gem.c
Attilio Rao 89f6b8632c Switch the vm_object mutex to be a rwlock. This will enable in the 
future further optimizations where the vm_object lock will be held
in read mode most of the time the page cache resident pool of pages
are accessed for reading purposes.

The change is mostly mechanical but few notes are reported:
* The KPI changes as follow:
  - VM_OBJECT_LOCK() -> VM_OBJECT_WLOCK()
  - VM_OBJECT_TRYLOCK() -> VM_OBJECT_TRYWLOCK()
  - VM_OBJECT_UNLOCK() -> VM_OBJECT_WUNLOCK()
  - VM_OBJECT_LOCK_ASSERT(MA_OWNED) -> VM_OBJECT_ASSERT_WLOCKED()
    (in order to avoid visibility of implementation details)
  - The read-mode operations are added:
    VM_OBJECT_RLOCK(), VM_OBJECT_TRYRLOCK(), VM_OBJECT_RUNLOCK(),
    VM_OBJECT_ASSERT_RLOCKED(), VM_OBJECT_ASSERT_LOCKED()
* The vm/vm_pager.h namespace pollution avoidance (forcing requiring
  sys/mutex.h in consumers directly to cater its inlining functions
  using VM_OBJECT_LOCK()) imposes that all the vm/vm_pager.h
  consumers now must include also sys/rwlock.h.
* zfs requires a quite convoluted fix to include FreeBSD rwlocks into
  the compat layer because the name clash between FreeBSD and solaris
  versions must be avoided.
  At this purpose zfs redefines the vm_object locking functions
  directly, isolating the FreeBSD components in specific compat stubs.

The KPI results heavilly broken by this commit.  Thirdy part ports must
be updated accordingly (I can think off-hand of VirtualBox, for example).

Sponsored by:	EMC / Isilon storage division
Reviewed by:	jeff
Reviewed by:	pjd (ZFS specific review)
Discussed with:	alc
Tested by:	pho
2013-03-09 02:32:23 +00:00

3761 lines
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/*-
* Copyright © 2008 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
* Copyright (c) 2011 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Konstantin Belousov under sponsorship from
* the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <dev/drm2/drmP.h>
#include <dev/drm2/drm.h>
#include <dev/drm2/i915/i915_drm.h>
#include <dev/drm2/i915/i915_drv.h>
#include <dev/drm2/i915/intel_drv.h>
#include <dev/drm2/i915/intel_ringbuffer.h>
#include <sys/resourcevar.h>
#include <sys/sched.h>
#include <sys/sf_buf.h>
static void i915_gem_object_flush_cpu_write_domain(
struct drm_i915_gem_object *obj);
static uint32_t i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size,
int tiling_mode);
static uint32_t i915_gem_get_gtt_alignment(struct drm_device *dev,
uint32_t size, int tiling_mode);
static int i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj,
unsigned alignment, bool map_and_fenceable);
static int i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj,
int flags);
static void i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj);
static int i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj,
bool write);
static void i915_gem_object_set_to_full_cpu_read_domain(
struct drm_i915_gem_object *obj);
static int i915_gem_object_set_cpu_read_domain_range(
struct drm_i915_gem_object *obj, uint64_t offset, uint64_t size);
static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj);
static void i915_gem_object_truncate(struct drm_i915_gem_object *obj);
static int i915_gem_object_is_purgeable(struct drm_i915_gem_object *obj);
static bool i915_gem_object_is_inactive(struct drm_i915_gem_object *obj);
static int i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_object *obj);
static vm_page_t i915_gem_wire_page(vm_object_t object, vm_pindex_t pindex);
static void i915_gem_process_flushing_list(struct intel_ring_buffer *ring,
uint32_t flush_domains);
static void i915_gem_clear_fence_reg(struct drm_device *dev,
struct drm_i915_fence_reg *reg);
static void i915_gem_reset_fences(struct drm_device *dev);
static void i915_gem_retire_task_handler(void *arg, int pending);
static int i915_gem_phys_pwrite(struct drm_device *dev,
struct drm_i915_gem_object *obj, uint64_t data_ptr, uint64_t offset,
uint64_t size, struct drm_file *file_priv);
static void i915_gem_lowmem(void *arg);
MALLOC_DEFINE(DRM_I915_GEM, "i915gem", "Allocations from i915 gem");
long i915_gem_wired_pages_cnt;
static void
i915_gem_info_add_obj(struct drm_i915_private *dev_priv, size_t size)
{
dev_priv->mm.object_count++;
dev_priv->mm.object_memory += size;
}
static void
i915_gem_info_remove_obj(struct drm_i915_private *dev_priv, size_t size)
{
dev_priv->mm.object_count--;
dev_priv->mm.object_memory -= size;
}
static int
i915_gem_wait_for_error(struct drm_device *dev)
{
struct drm_i915_private *dev_priv;
int ret;
dev_priv = dev->dev_private;
if (!atomic_load_acq_int(&dev_priv->mm.wedged))
return (0);
mtx_lock(&dev_priv->error_completion_lock);
while (dev_priv->error_completion == 0) {
ret = -msleep(&dev_priv->error_completion,
&dev_priv->error_completion_lock, PCATCH, "915wco", 0);
if (ret != 0) {
mtx_unlock(&dev_priv->error_completion_lock);
return (ret);
}
}
mtx_unlock(&dev_priv->error_completion_lock);
if (atomic_read(&dev_priv->mm.wedged)) {
mtx_lock(&dev_priv->error_completion_lock);
dev_priv->error_completion++;
mtx_unlock(&dev_priv->error_completion_lock);
}
return (0);
}
int
i915_mutex_lock_interruptible(struct drm_device *dev)
{
struct drm_i915_private *dev_priv;
int ret;
dev_priv = dev->dev_private;
ret = i915_gem_wait_for_error(dev);
if (ret != 0)
return (ret);
/*
* interruptible shall it be. might indeed be if dev_lock is
* changed to sx
*/
ret = sx_xlock_sig(&dev->dev_struct_lock);
if (ret != 0)
return (-ret);
return (0);
}
static void
i915_gem_free_object_tail(struct drm_i915_gem_object *obj)
{
struct drm_device *dev;
drm_i915_private_t *dev_priv;
int ret;
dev = obj->base.dev;
dev_priv = dev->dev_private;
ret = i915_gem_object_unbind(obj);
if (ret == -ERESTART) {
list_move(&obj->mm_list, &dev_priv->mm.deferred_free_list);
return;
}
CTR1(KTR_DRM, "object_destroy_tail %p", obj);
drm_gem_free_mmap_offset(&obj->base);
drm_gem_object_release(&obj->base);
i915_gem_info_remove_obj(dev_priv, obj->base.size);
free(obj->page_cpu_valid, DRM_I915_GEM);
free(obj->bit_17, DRM_I915_GEM);
free(obj, DRM_I915_GEM);
}
void
i915_gem_free_object(struct drm_gem_object *gem_obj)
{
struct drm_i915_gem_object *obj;
struct drm_device *dev;
obj = to_intel_bo(gem_obj);
dev = obj->base.dev;
while (obj->pin_count > 0)
i915_gem_object_unpin(obj);
if (obj->phys_obj != NULL)
i915_gem_detach_phys_object(dev, obj);
i915_gem_free_object_tail(obj);
}
static void
init_ring_lists(struct intel_ring_buffer *ring)
{
INIT_LIST_HEAD(&ring->active_list);
INIT_LIST_HEAD(&ring->request_list);
INIT_LIST_HEAD(&ring->gpu_write_list);
}
void
i915_gem_load(struct drm_device *dev)
{
drm_i915_private_t *dev_priv;
int i;
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.pinned_list);
INIT_LIST_HEAD(&dev_priv->mm.fence_list);
INIT_LIST_HEAD(&dev_priv->mm.deferred_free_list);
INIT_LIST_HEAD(&dev_priv->mm.gtt_list);
for (i = 0; i < I915_NUM_RINGS; i++)
init_ring_lists(&dev_priv->rings[i]);
for (i = 0; i < I915_MAX_NUM_FENCES; i++)
INIT_LIST_HEAD(&dev_priv->fence_regs[i].lru_list);
TIMEOUT_TASK_INIT(dev_priv->tq, &dev_priv->mm.retire_task, 0,
i915_gem_retire_task_handler, dev_priv);
dev_priv->error_completion = 0;
/* On GEN3 we really need to make sure the ARB C3 LP bit is set */
if (IS_GEN3(dev)) {
u32 tmp = I915_READ(MI_ARB_STATE);
if (!(tmp & MI_ARB_C3_LP_WRITE_ENABLE)) {
/*
* arb state is a masked write, so set bit +
* bit in mask.
*/
tmp = MI_ARB_C3_LP_WRITE_ENABLE |
(MI_ARB_C3_LP_WRITE_ENABLE << MI_ARB_MASK_SHIFT);
I915_WRITE(MI_ARB_STATE, tmp);
}
}
dev_priv->relative_constants_mode = I915_EXEC_CONSTANTS_REL_GENERAL;
/* Old X drivers will take 0-2 for front, back, depth buffers */
if (!drm_core_check_feature(dev, DRIVER_MODESET))
dev_priv->fence_reg_start = 3;
if (INTEL_INFO(dev)->gen >= 4 || IS_I945G(dev) || IS_I945GM(dev) ||
IS_G33(dev))
dev_priv->num_fence_regs = 16;
else
dev_priv->num_fence_regs = 8;
/* Initialize fence registers to zero */
for (i = 0; i < dev_priv->num_fence_regs; i++) {
i915_gem_clear_fence_reg(dev, &dev_priv->fence_regs[i]);
}
i915_gem_detect_bit_6_swizzle(dev);
dev_priv->mm.interruptible = true;
dev_priv->mm.i915_lowmem = EVENTHANDLER_REGISTER(vm_lowmem,
i915_gem_lowmem, dev, EVENTHANDLER_PRI_ANY);
}
int
i915_gem_do_init(struct drm_device *dev, unsigned long start,
unsigned long mappable_end, unsigned long end)
{
drm_i915_private_t *dev_priv;
unsigned long mappable;
int error;
dev_priv = dev->dev_private;
mappable = min(end, mappable_end) - start;
drm_mm_init(&dev_priv->mm.gtt_space, start, end - start);
dev_priv->mm.gtt_start = start;
dev_priv->mm.gtt_mappable_end = mappable_end;
dev_priv->mm.gtt_end = end;
dev_priv->mm.gtt_total = end - start;
dev_priv->mm.mappable_gtt_total = mappable;
/* Take over this portion of the GTT */
intel_gtt_clear_range(start / PAGE_SIZE, (end-start) / PAGE_SIZE);
device_printf(dev->device,
"taking over the fictitious range 0x%lx-0x%lx\n",
dev->agp->base + start, dev->agp->base + start + mappable);
error = -vm_phys_fictitious_reg_range(dev->agp->base + start,
dev->agp->base + start + mappable, VM_MEMATTR_WRITE_COMBINING);
return (error);
}
int
i915_gem_init_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_gem_init *args;
drm_i915_private_t *dev_priv;
dev_priv = dev->dev_private;
args = data;
if (args->gtt_start >= args->gtt_end ||
(args->gtt_end | args->gtt_start) & (PAGE_SIZE - 1))
return (-EINVAL);
if (mtx_initialized(&dev_priv->mm.gtt_space.unused_lock))
return (-EBUSY);
/*
* XXXKIB. The second-time initialization should be guarded
* against.
*/
return (i915_gem_do_init(dev, args->gtt_start, args->gtt_end,
args->gtt_end));
}
int
i915_gem_idle(struct drm_device *dev)
{
drm_i915_private_t *dev_priv;
int ret;
dev_priv = dev->dev_private;
if (dev_priv->mm.suspended)
return (0);
ret = i915_gpu_idle(dev, true);
if (ret != 0)
return (ret);
/* Under UMS, be paranoid and evict. */
if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
ret = i915_gem_evict_inactive(dev, false);
if (ret != 0)
return ret;
}
i915_gem_reset_fences(dev);
/* Hack! Don't let anybody do execbuf while we don't control the chip.
* We need to replace this with a semaphore, or something.
* And not confound mm.suspended!
*/
dev_priv->mm.suspended = 1;
callout_stop(&dev_priv->hangcheck_timer);
i915_kernel_lost_context(dev);
i915_gem_cleanup_ringbuffer(dev);
/* Cancel the retire work handler, which should be idle now. */
taskqueue_cancel_timeout(dev_priv->tq, &dev_priv->mm.retire_task, NULL);
return (ret);
}
void
i915_gem_init_swizzling(struct drm_device *dev)
{
drm_i915_private_t *dev_priv;
dev_priv = dev->dev_private;
if (INTEL_INFO(dev)->gen < 5 ||
dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_NONE)
return;
I915_WRITE(DISP_ARB_CTL, I915_READ(DISP_ARB_CTL) |
DISP_TILE_SURFACE_SWIZZLING);
if (IS_GEN5(dev))
return;
I915_WRITE(TILECTL, I915_READ(TILECTL) | TILECTL_SWZCTL);
if (IS_GEN6(dev))
I915_WRITE(ARB_MODE, ARB_MODE_ENABLE(ARB_MODE_SWIZZLE_SNB));
else
I915_WRITE(ARB_MODE, ARB_MODE_ENABLE(ARB_MODE_SWIZZLE_IVB));
}
void
i915_gem_init_ppgtt(struct drm_device *dev)
{
drm_i915_private_t *dev_priv;
struct i915_hw_ppgtt *ppgtt;
uint32_t pd_offset, pd_entry;
vm_paddr_t pt_addr;
struct intel_ring_buffer *ring;
u_int first_pd_entry_in_global_pt, i;
dev_priv = dev->dev_private;
ppgtt = dev_priv->mm.aliasing_ppgtt;
if (ppgtt == NULL)
return;
first_pd_entry_in_global_pt = 512 * 1024 - I915_PPGTT_PD_ENTRIES;
for (i = 0; i < ppgtt->num_pd_entries; i++) {
pt_addr = VM_PAGE_TO_PHYS(ppgtt->pt_pages[i]);
pd_entry = GEN6_PDE_ADDR_ENCODE(pt_addr);
pd_entry |= GEN6_PDE_VALID;
intel_gtt_write(first_pd_entry_in_global_pt + i, pd_entry);
}
intel_gtt_read_pte(first_pd_entry_in_global_pt);
pd_offset = ppgtt->pd_offset;
pd_offset /= 64; /* in cachelines, */
pd_offset <<= 16;
if (INTEL_INFO(dev)->gen == 6) {
uint32_t ecochk = I915_READ(GAM_ECOCHK);
I915_WRITE(GAM_ECOCHK, ecochk | ECOCHK_SNB_BIT |
ECOCHK_PPGTT_CACHE64B);
I915_WRITE(GFX_MODE, GFX_MODE_ENABLE(GFX_PPGTT_ENABLE));
} else if (INTEL_INFO(dev)->gen >= 7) {
I915_WRITE(GAM_ECOCHK, ECOCHK_PPGTT_CACHE64B);
/* GFX_MODE is per-ring on gen7+ */
}
for (i = 0; i < I915_NUM_RINGS; i++) {
ring = &dev_priv->rings[i];
if (INTEL_INFO(dev)->gen >= 7)
I915_WRITE(RING_MODE_GEN7(ring),
GFX_MODE_ENABLE(GFX_PPGTT_ENABLE));
I915_WRITE(RING_PP_DIR_DCLV(ring), PP_DIR_DCLV_2G);
I915_WRITE(RING_PP_DIR_BASE(ring), pd_offset);
}
}
int
i915_gem_init_hw(struct drm_device *dev)
{
drm_i915_private_t *dev_priv;
int ret;
dev_priv = dev->dev_private;
i915_gem_init_swizzling(dev);
ret = intel_init_render_ring_buffer(dev);
if (ret != 0)
return (ret);
if (HAS_BSD(dev)) {
ret = intel_init_bsd_ring_buffer(dev);
if (ret != 0)
goto cleanup_render_ring;
}
if (HAS_BLT(dev)) {
ret = intel_init_blt_ring_buffer(dev);
if (ret != 0)
goto cleanup_bsd_ring;
}
dev_priv->next_seqno = 1;
i915_gem_init_ppgtt(dev);
return (0);
cleanup_bsd_ring:
intel_cleanup_ring_buffer(&dev_priv->rings[VCS]);
cleanup_render_ring:
intel_cleanup_ring_buffer(&dev_priv->rings[RCS]);
return (ret);
}
int
i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_private *dev_priv;
struct drm_i915_gem_get_aperture *args;
struct drm_i915_gem_object *obj;
size_t pinned;
dev_priv = dev->dev_private;
args = data;
if (!(dev->driver->driver_features & DRIVER_GEM))
return (-ENODEV);
pinned = 0;
DRM_LOCK(dev);
list_for_each_entry(obj, &dev_priv->mm.pinned_list, mm_list)
pinned += obj->gtt_space->size;
DRM_UNLOCK(dev);
args->aper_size = dev_priv->mm.gtt_total;
args->aper_available_size = args->aper_size - pinned;
return (0);
}
int
i915_gem_object_pin(struct drm_i915_gem_object *obj, uint32_t alignment,
bool map_and_fenceable)
{
struct drm_device *dev;
struct drm_i915_private *dev_priv;
int ret;
dev = obj->base.dev;
dev_priv = dev->dev_private;
KASSERT(obj->pin_count != DRM_I915_GEM_OBJECT_MAX_PIN_COUNT,
("Max pin count"));
if (obj->gtt_space != NULL) {
if ((alignment && obj->gtt_offset & (alignment - 1)) ||
(map_and_fenceable && !obj->map_and_fenceable)) {
DRM_DEBUG("bo is already pinned with incorrect alignment:"
" offset=%x, req.alignment=%x, req.map_and_fenceable=%d,"
" obj->map_and_fenceable=%d\n",
obj->gtt_offset, alignment,
map_and_fenceable,
obj->map_and_fenceable);
ret = i915_gem_object_unbind(obj);
if (ret != 0)
return (ret);
}
}
if (obj->gtt_space == NULL) {
ret = i915_gem_object_bind_to_gtt(obj, alignment,
map_and_fenceable);
if (ret)
return (ret);
}
if (obj->pin_count++ == 0 && !obj->active)
list_move_tail(&obj->mm_list, &dev_priv->mm.pinned_list);
obj->pin_mappable |= map_and_fenceable;
#if 1
KIB_NOTYET();
#else
WARN_ON(i915_verify_lists(dev));
#endif
return (0);
}
void
i915_gem_object_unpin(struct drm_i915_gem_object *obj)
{
struct drm_device *dev;
drm_i915_private_t *dev_priv;
dev = obj->base.dev;
dev_priv = dev->dev_private;
#if 1
KIB_NOTYET();
#else
WARN_ON(i915_verify_lists(dev));
#endif
KASSERT(obj->pin_count != 0, ("zero pin count"));
KASSERT(obj->gtt_space != NULL, ("No gtt mapping"));
if (--obj->pin_count == 0) {
if (!obj->active)
list_move_tail(&obj->mm_list,
&dev_priv->mm.inactive_list);
obj->pin_mappable = false;
}
#if 1
KIB_NOTYET();
#else
WARN_ON(i915_verify_lists(dev));
#endif
}
int
i915_gem_pin_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_gem_pin *args;
struct drm_i915_gem_object *obj;
struct drm_gem_object *gobj;
int ret;
args = data;
ret = i915_mutex_lock_interruptible(dev);
if (ret != 0)
return ret;
gobj = drm_gem_object_lookup(dev, file, args->handle);
if (gobj == NULL) {
ret = -ENOENT;
goto unlock;
}
obj = to_intel_bo(gobj);
if (obj->madv != I915_MADV_WILLNEED) {
DRM_ERROR("Attempting to pin a purgeable buffer\n");
ret = -EINVAL;
goto out;
}
if (obj->pin_filp != NULL && obj->pin_filp != file) {
DRM_ERROR("Already pinned in i915_gem_pin_ioctl(): %d\n",
args->handle);
ret = -EINVAL;
goto out;
}
obj->user_pin_count++;
obj->pin_filp = file;
if (obj->user_pin_count == 1) {
ret = i915_gem_object_pin(obj, args->alignment, true);
if (ret != 0)
goto out;
}
/* XXX - flush the CPU caches for pinned objects
* as the X server doesn't manage domains yet
*/
i915_gem_object_flush_cpu_write_domain(obj);
args->offset = obj->gtt_offset;
out:
drm_gem_object_unreference(&obj->base);
unlock:
DRM_UNLOCK(dev);
return (ret);
}
int
i915_gem_unpin_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_gem_pin *args;
struct drm_i915_gem_object *obj;
int ret;
args = data;
ret = i915_mutex_lock_interruptible(dev);
if (ret != 0)
return (ret);
obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
if (&obj->base == NULL) {
ret = -ENOENT;
goto unlock;
}
if (obj->pin_filp != file) {
DRM_ERROR("Not pinned by caller in i915_gem_pin_ioctl(): %d\n",
args->handle);
ret = -EINVAL;
goto out;
}
obj->user_pin_count--;
if (obj->user_pin_count == 0) {
obj->pin_filp = NULL;
i915_gem_object_unpin(obj);
}
out:
drm_gem_object_unreference(&obj->base);
unlock:
DRM_UNLOCK(dev);
return (ret);
}
int
i915_gem_busy_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_gem_busy *args;
struct drm_i915_gem_object *obj;
struct drm_i915_gem_request *request;
int ret;
args = data;
ret = i915_mutex_lock_interruptible(dev);
if (ret != 0)
return ret;
obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
if (&obj->base == NULL) {
ret = -ENOENT;
goto unlock;
}
args->busy = obj->active;
if (args->busy) {
if (obj->base.write_domain & I915_GEM_GPU_DOMAINS) {
ret = i915_gem_flush_ring(obj->ring,
0, obj->base.write_domain);
} else if (obj->ring->outstanding_lazy_request ==
obj->last_rendering_seqno) {
request = malloc(sizeof(*request), DRM_I915_GEM,
M_WAITOK | M_ZERO);
ret = i915_add_request(obj->ring, NULL, request);
if (ret != 0)
free(request, DRM_I915_GEM);
}
i915_gem_retire_requests_ring(obj->ring);
args->busy = obj->active;
}
drm_gem_object_unreference(&obj->base);
unlock:
DRM_UNLOCK(dev);
return (ret);
}
static int
i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file)
{
struct drm_i915_private *dev_priv;
struct drm_i915_file_private *file_priv;
unsigned long recent_enough;
struct drm_i915_gem_request *request;
struct intel_ring_buffer *ring;
u32 seqno;
int ret;
dev_priv = dev->dev_private;
if (atomic_read(&dev_priv->mm.wedged))
return (-EIO);
file_priv = file->driver_priv;
recent_enough = ticks - (20 * hz / 1000);
ring = NULL;
seqno = 0;
mtx_lock(&file_priv->mm.lck);
list_for_each_entry(request, &file_priv->mm.request_list, client_list) {
if (time_after_eq(request->emitted_jiffies, recent_enough))
break;
ring = request->ring;
seqno = request->seqno;
}
mtx_unlock(&file_priv->mm.lck);
if (seqno == 0)
return (0);
ret = 0;
mtx_lock(&ring->irq_lock);
if (!i915_seqno_passed(ring->get_seqno(ring), seqno)) {
if (ring->irq_get(ring)) {
while (ret == 0 &&
!(i915_seqno_passed(ring->get_seqno(ring), seqno) ||
atomic_read(&dev_priv->mm.wedged)))
ret = -msleep(ring, &ring->irq_lock, PCATCH,
"915thr", 0);
ring->irq_put(ring);
if (ret == 0 && atomic_read(&dev_priv->mm.wedged))
ret = -EIO;
} else if (_intel_wait_for(dev,
i915_seqno_passed(ring->get_seqno(ring), seqno) ||
atomic_read(&dev_priv->mm.wedged), 3000, 0, "915rtr")) {
ret = -EBUSY;
}
}
mtx_unlock(&ring->irq_lock);
if (ret == 0)
taskqueue_enqueue_timeout(dev_priv->tq,
&dev_priv->mm.retire_task, 0);
return (ret);
}
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_madvise_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_i915_gem_madvise *args;
struct drm_i915_gem_object *obj;
int ret;
args = data;
switch (args->madv) {
case I915_MADV_DONTNEED:
case I915_MADV_WILLNEED:
break;
default:
return (-EINVAL);
}
ret = i915_mutex_lock_interruptible(dev);
if (ret != 0)
return (ret);
obj = to_intel_bo(drm_gem_object_lookup(dev, file_priv, args->handle));
if (&obj->base == NULL) {
ret = -ENOENT;
goto unlock;
}
if (obj->pin_count != 0) {
ret = -EINVAL;
goto out;
}
if (obj->madv != I915_MADV_PURGED_INTERNAL)
obj->madv = args->madv;
if (i915_gem_object_is_purgeable(obj) && obj->gtt_space == NULL)
i915_gem_object_truncate(obj);
args->retained = obj->madv != I915_MADV_PURGED_INTERNAL;
out:
drm_gem_object_unreference(&obj->base);
unlock:
DRM_UNLOCK(dev);
return (ret);
}
void
i915_gem_cleanup_ringbuffer(struct drm_device *dev)
{
drm_i915_private_t *dev_priv;
int i;
dev_priv = dev->dev_private;
for (i = 0; i < I915_NUM_RINGS; i++)
intel_cleanup_ring_buffer(&dev_priv->rings[i]);
}
int
i915_gem_entervt_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_i915_private_t *dev_priv;
int ret, i;
if (drm_core_check_feature(dev, DRIVER_MODESET))
return (0);
dev_priv = dev->dev_private;
if (atomic_load_acq_int(&dev_priv->mm.wedged) != 0) {
DRM_ERROR("Reenabling wedged hardware, good luck\n");
atomic_store_rel_int(&dev_priv->mm.wedged, 0);
}
dev_priv->mm.suspended = 0;
ret = i915_gem_init_hw(dev);
if (ret != 0) {
return (ret);
}
KASSERT(list_empty(&dev_priv->mm.active_list), ("active list"));
KASSERT(list_empty(&dev_priv->mm.flushing_list), ("flushing list"));
KASSERT(list_empty(&dev_priv->mm.inactive_list), ("inactive list"));
for (i = 0; i < I915_NUM_RINGS; i++) {
KASSERT(list_empty(&dev_priv->rings[i].active_list),
("ring %d active list", i));
KASSERT(list_empty(&dev_priv->rings[i].request_list),
("ring %d request list", i));
}
DRM_UNLOCK(dev);
ret = drm_irq_install(dev);
DRM_LOCK(dev);
if (ret)
goto cleanup_ringbuffer;
return (0);
cleanup_ringbuffer:
i915_gem_cleanup_ringbuffer(dev);
dev_priv->mm.suspended = 1;
return (ret);
}
int
i915_gem_leavevt_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
if (drm_core_check_feature(dev, DRIVER_MODESET))
return 0;
drm_irq_uninstall(dev);
return (i915_gem_idle(dev));
}
int
i915_gem_create(struct drm_file *file, struct drm_device *dev, uint64_t size,
uint32_t *handle_p)
{
struct drm_i915_gem_object *obj;
uint32_t handle;
int ret;
size = roundup(size, PAGE_SIZE);
if (size == 0)
return (-EINVAL);
obj = i915_gem_alloc_object(dev, size);
if (obj == NULL)
return (-ENOMEM);
handle = 0;
ret = drm_gem_handle_create(file, &obj->base, &handle);
if (ret != 0) {
drm_gem_object_release(&obj->base);
i915_gem_info_remove_obj(dev->dev_private, obj->base.size);
free(obj, DRM_I915_GEM);
return (-ret);
}
/* drop reference from allocate - handle holds it now */
drm_gem_object_unreference(&obj->base);
CTR2(KTR_DRM, "object_create %p %x", obj, size);
*handle_p = handle;
return (0);
}
int
i915_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
/* have to work out size/pitch and return them */
args->pitch = roundup2(args->width * ((args->bpp + 7) / 8), 64);
args->size = args->pitch * args->height;
return (i915_gem_create(file, dev, args->size, &args->handle));
}
int
i915_gem_dumb_destroy(struct drm_file *file, struct drm_device *dev,
uint32_t handle)
{
return (drm_gem_handle_delete(file, handle));
}
int
i915_gem_create_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_gem_create *args = data;
return (i915_gem_create(file, dev, args->size, &args->handle));
}
static int
i915_gem_swap_io(struct drm_device *dev, struct drm_i915_gem_object *obj,
uint64_t data_ptr, uint64_t size, uint64_t offset, enum uio_rw rw,
struct drm_file *file)
{
vm_object_t vm_obj;
vm_page_t m;
struct sf_buf *sf;
vm_offset_t mkva;
vm_pindex_t obj_pi;
int cnt, do_bit17_swizzling, length, obj_po, ret, swizzled_po;
if (obj->gtt_offset != 0 && rw == UIO_READ)
do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj);
else
do_bit17_swizzling = 0;
obj->dirty = 1;
vm_obj = obj->base.vm_obj;
ret = 0;
VM_OBJECT_WLOCK(vm_obj);
vm_object_pip_add(vm_obj, 1);
while (size > 0) {
obj_pi = OFF_TO_IDX(offset);
obj_po = offset & PAGE_MASK;
m = i915_gem_wire_page(vm_obj, obj_pi);
VM_OBJECT_WUNLOCK(vm_obj);
sched_pin();
sf = sf_buf_alloc(m, SFB_CPUPRIVATE);
mkva = sf_buf_kva(sf);
length = min(size, PAGE_SIZE - obj_po);
while (length > 0) {
if (do_bit17_swizzling &&
(VM_PAGE_TO_PHYS(m) & (1 << 17)) != 0) {
cnt = roundup2(obj_po + 1, 64);
cnt = min(cnt - obj_po, length);
swizzled_po = obj_po ^ 64;
} else {
cnt = length;
swizzled_po = obj_po;
}
if (rw == UIO_READ)
ret = -copyout_nofault(
(char *)mkva + swizzled_po,
(void *)(uintptr_t)data_ptr, cnt);
else
ret = -copyin_nofault(
(void *)(uintptr_t)data_ptr,
(char *)mkva + swizzled_po, cnt);
if (ret != 0)
break;
data_ptr += cnt;
size -= cnt;
length -= cnt;
offset += cnt;
obj_po += cnt;
}
sf_buf_free(sf);
sched_unpin();
VM_OBJECT_WLOCK(vm_obj);
if (rw == UIO_WRITE)
vm_page_dirty(m);
vm_page_reference(m);
vm_page_lock(m);
vm_page_unwire(m, 1);
vm_page_unlock(m);
atomic_add_long(&i915_gem_wired_pages_cnt, -1);
if (ret != 0)
break;
}
vm_object_pip_wakeup(vm_obj);
VM_OBJECT_WUNLOCK(vm_obj);
return (ret);
}
static int
i915_gem_gtt_write(struct drm_device *dev, struct drm_i915_gem_object *obj,
uint64_t data_ptr, uint64_t size, uint64_t offset, struct drm_file *file)
{
vm_offset_t mkva;
vm_pindex_t obj_pi;
int obj_po, ret;
obj_pi = OFF_TO_IDX(offset);
obj_po = offset & PAGE_MASK;
mkva = (vm_offset_t)pmap_mapdev_attr(dev->agp->base + obj->gtt_offset +
IDX_TO_OFF(obj_pi), size, PAT_WRITE_COMBINING);
ret = -copyin_nofault((void *)(uintptr_t)data_ptr, (char *)mkva +
obj_po, size);
pmap_unmapdev(mkva, size);
return (ret);
}
static int
i915_gem_obj_io(struct drm_device *dev, uint32_t handle, uint64_t data_ptr,
uint64_t size, uint64_t offset, enum uio_rw rw, struct drm_file *file)
{
struct drm_i915_gem_object *obj;
vm_page_t *ma;
vm_offset_t start, end;
int npages, ret;
if (size == 0)
return (0);
start = trunc_page(data_ptr);
end = round_page(data_ptr + size);
npages = howmany(end - start, PAGE_SIZE);
ma = malloc(npages * sizeof(vm_page_t), DRM_I915_GEM, M_WAITOK |
M_ZERO);
npages = vm_fault_quick_hold_pages(&curproc->p_vmspace->vm_map,
(vm_offset_t)data_ptr, size,
(rw == UIO_READ ? VM_PROT_WRITE : 0 ) | VM_PROT_READ, ma, npages);
if (npages == -1) {
ret = -EFAULT;
goto free_ma;
}
ret = i915_mutex_lock_interruptible(dev);
if (ret != 0)
goto unlocked;
obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle));
if (&obj->base == NULL) {
ret = -ENOENT;
goto unlock;
}
if (offset > obj->base.size || size > obj->base.size - offset) {
ret = -EINVAL;
goto out;
}
if (rw == UIO_READ) {
CTR3(KTR_DRM, "object_pread %p %jx %jx", obj, offset, size);
ret = i915_gem_object_set_cpu_read_domain_range(obj,
offset, size);
if (ret != 0)
goto out;
ret = i915_gem_swap_io(dev, obj, data_ptr, size, offset,
UIO_READ, file);
} else {
if (obj->phys_obj) {
CTR3(KTR_DRM, "object_phys_write %p %jx %jx", obj,
offset, size);
ret = i915_gem_phys_pwrite(dev, obj, data_ptr, offset,
size, file);
} else if (obj->gtt_space &&
obj->base.write_domain != I915_GEM_DOMAIN_CPU) {
CTR3(KTR_DRM, "object_gtt_write %p %jx %jx", obj,
offset, size);
ret = i915_gem_object_pin(obj, 0, true);
if (ret != 0)
goto out;
ret = i915_gem_object_set_to_gtt_domain(obj, true);
if (ret != 0)
goto out_unpin;
ret = i915_gem_object_put_fence(obj);
if (ret != 0)
goto out_unpin;
ret = i915_gem_gtt_write(dev, obj, data_ptr, size,
offset, file);
out_unpin:
i915_gem_object_unpin(obj);
} else {
CTR3(KTR_DRM, "object_pwrite %p %jx %jx", obj,
offset, size);
ret = i915_gem_object_set_to_cpu_domain(obj, true);
if (ret != 0)
goto out;
ret = i915_gem_swap_io(dev, obj, data_ptr, size, offset,
UIO_WRITE, file);
}
}
out:
drm_gem_object_unreference(&obj->base);
unlock:
DRM_UNLOCK(dev);
unlocked:
vm_page_unhold_pages(ma, npages);
free_ma:
free(ma, DRM_I915_GEM);
return (ret);
}
int
i915_gem_pread_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
{
struct drm_i915_gem_pread *args;
args = data;
return (i915_gem_obj_io(dev, args->handle, args->data_ptr, args->size,
args->offset, UIO_READ, file));
}
int
i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
{
struct drm_i915_gem_pwrite *args;
args = data;
return (i915_gem_obj_io(dev, args->handle, args->data_ptr, args->size,
args->offset, UIO_WRITE, file));
}
int
i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_gem_set_domain *args;
struct drm_i915_gem_object *obj;
uint32_t read_domains;
uint32_t write_domain;
int ret;
if ((dev->driver->driver_features & DRIVER_GEM) == 0)
return (-ENODEV);
args = data;
read_domains = args->read_domains;
write_domain = args->write_domain;
if ((write_domain & I915_GEM_GPU_DOMAINS) != 0 ||
(read_domains & I915_GEM_GPU_DOMAINS) != 0 ||
(write_domain != 0 && read_domains != write_domain))
return (-EINVAL);
ret = i915_mutex_lock_interruptible(dev);
if (ret != 0)
return (ret);
obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
if (&obj->base == NULL) {
ret = -ENOENT;
goto unlock;
}
if ((read_domains & I915_GEM_DOMAIN_GTT) != 0) {
ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0);
if (ret == -EINVAL)
ret = 0;
} else
ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0);
drm_gem_object_unreference(&obj->base);
unlock:
DRM_UNLOCK(dev);
return (ret);
}
int
i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_gem_sw_finish *args;
struct drm_i915_gem_object *obj;
int ret;
args = data;
ret = 0;
if ((dev->driver->driver_features & DRIVER_GEM) == 0)
return (ENODEV);
ret = i915_mutex_lock_interruptible(dev);
if (ret != 0)
return (ret);
obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
if (&obj->base == NULL) {
ret = -ENOENT;
goto unlock;
}
if (obj->pin_count != 0)
i915_gem_object_flush_cpu_write_domain(obj);
drm_gem_object_unreference(&obj->base);
unlock:
DRM_UNLOCK(dev);
return (ret);
}
int
i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_gem_mmap *args;
struct drm_gem_object *obj;
struct proc *p;
vm_map_t map;
vm_offset_t addr;
vm_size_t size;
int error, rv;
args = data;
if ((dev->driver->driver_features & DRIVER_GEM) == 0)
return (-ENODEV);
obj = drm_gem_object_lookup(dev, file, args->handle);
if (obj == NULL)
return (-ENOENT);
error = 0;
if (args->size == 0)
goto out;
p = curproc;
map = &p->p_vmspace->vm_map;
size = round_page(args->size);
PROC_LOCK(p);
if (map->size + size > lim_cur(p, RLIMIT_VMEM)) {
PROC_UNLOCK(p);
error = ENOMEM;
goto out;
}
PROC_UNLOCK(p);
addr = 0;
vm_object_reference(obj->vm_obj);
DRM_UNLOCK(dev);
rv = vm_map_find(map, obj->vm_obj, args->offset, &addr, args->size,
VMFS_ANY_SPACE, VM_PROT_READ | VM_PROT_WRITE,
VM_PROT_READ | VM_PROT_WRITE, MAP_SHARED);
if (rv != KERN_SUCCESS) {
vm_object_deallocate(obj->vm_obj);
error = -vm_mmap_to_errno(rv);
} else {
args->addr_ptr = (uint64_t)addr;
}
DRM_LOCK(dev);
out:
drm_gem_object_unreference(obj);
return (error);
}
static int
i915_gem_pager_ctor(void *handle, vm_ooffset_t size, vm_prot_t prot,
vm_ooffset_t foff, struct ucred *cred, u_short *color)
{
*color = 0; /* XXXKIB */
return (0);
}
int i915_intr_pf;
static int
i915_gem_pager_fault(vm_object_t vm_obj, vm_ooffset_t offset, int prot,
vm_page_t *mres)
{
struct drm_gem_object *gem_obj;
struct drm_i915_gem_object *obj;
struct drm_device *dev;
drm_i915_private_t *dev_priv;
vm_page_t m, oldm;
int cause, ret;
bool write;
gem_obj = vm_obj->handle;
obj = to_intel_bo(gem_obj);
dev = obj->base.dev;
dev_priv = dev->dev_private;
#if 0
write = (prot & VM_PROT_WRITE) != 0;
#else
write = true;
#endif
vm_object_pip_add(vm_obj, 1);
/*
* Remove the placeholder page inserted by vm_fault() from the
* object before dropping the object lock. If
* i915_gem_release_mmap() is active in parallel on this gem
* object, then it owns the drm device sx and might find the
* placeholder already. Then, since the page is busy,
* i915_gem_release_mmap() sleeps waiting for the busy state
* of the page cleared. We will be not able to acquire drm
* device lock until i915_gem_release_mmap() is able to make a
* progress.
*/
if (*mres != NULL) {
oldm = *mres;
vm_page_lock(oldm);
vm_page_remove(oldm);
vm_page_unlock(oldm);
*mres = NULL;
} else
oldm = NULL;
retry:
VM_OBJECT_WUNLOCK(vm_obj);
unlocked_vmobj:
cause = ret = 0;
m = NULL;
if (i915_intr_pf) {
ret = i915_mutex_lock_interruptible(dev);
if (ret != 0) {
cause = 10;
goto out;
}
} else
DRM_LOCK(dev);
/* Now bind it into the GTT if needed */
if (!obj->map_and_fenceable) {
ret = i915_gem_object_unbind(obj);
if (ret != 0) {
cause = 20;
goto unlock;
}
}
if (!obj->gtt_space) {
ret = i915_gem_object_bind_to_gtt(obj, 0, true);
if (ret != 0) {
cause = 30;
goto unlock;
}
ret = i915_gem_object_set_to_gtt_domain(obj, write);
if (ret != 0) {
cause = 40;
goto unlock;
}
}
if (obj->tiling_mode == I915_TILING_NONE)
ret = i915_gem_object_put_fence(obj);
else
ret = i915_gem_object_get_fence(obj, NULL);
if (ret != 0) {
cause = 50;
goto unlock;
}
if (i915_gem_object_is_inactive(obj))
list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list);
obj->fault_mappable = true;
VM_OBJECT_WLOCK(vm_obj);
m = vm_phys_fictitious_to_vm_page(dev->agp->base + obj->gtt_offset +
offset);
if (m == NULL) {
cause = 60;
ret = -EFAULT;
goto unlock;
}
KASSERT((m->flags & PG_FICTITIOUS) != 0,
("not fictitious %p", m));
KASSERT(m->wire_count == 1, ("wire_count not 1 %p", m));
if ((m->flags & VPO_BUSY) != 0) {
DRM_UNLOCK(dev);
vm_page_sleep(m, "915pbs");
goto retry;
}
m->valid = VM_PAGE_BITS_ALL;
*mres = m;
vm_page_lock(m);
vm_page_insert(m, vm_obj, OFF_TO_IDX(offset));
vm_page_unlock(m);
vm_page_busy(m);
CTR4(KTR_DRM, "fault %p %jx %x phys %x", gem_obj, offset, prot,
m->phys_addr);
DRM_UNLOCK(dev);
if (oldm != NULL) {
vm_page_lock(oldm);
vm_page_free(oldm);
vm_page_unlock(oldm);
}
vm_object_pip_wakeup(vm_obj);
return (VM_PAGER_OK);
unlock:
DRM_UNLOCK(dev);
out:
KASSERT(ret != 0, ("i915_gem_pager_fault: wrong return"));
CTR5(KTR_DRM, "fault_fail %p %jx %x err %d %d", gem_obj, offset, prot,
-ret, cause);
if (ret == -EAGAIN || ret == -EIO || ret == -EINTR) {
kern_yield(PRI_USER);
goto unlocked_vmobj;
}
VM_OBJECT_WLOCK(vm_obj);
vm_object_pip_wakeup(vm_obj);
return (VM_PAGER_ERROR);
}
static void
i915_gem_pager_dtor(void *handle)
{
struct drm_gem_object *obj;
struct drm_device *dev;
obj = handle;
dev = obj->dev;
DRM_LOCK(dev);
drm_gem_free_mmap_offset(obj);
i915_gem_release_mmap(to_intel_bo(obj));
drm_gem_object_unreference(obj);
DRM_UNLOCK(dev);
}
struct cdev_pager_ops i915_gem_pager_ops = {
.cdev_pg_fault = i915_gem_pager_fault,
.cdev_pg_ctor = i915_gem_pager_ctor,
.cdev_pg_dtor = i915_gem_pager_dtor
};
int
i915_gem_mmap_gtt(struct drm_file *file, struct drm_device *dev,
uint32_t handle, uint64_t *offset)
{
struct drm_i915_private *dev_priv;
struct drm_i915_gem_object *obj;
int ret;
if (!(dev->driver->driver_features & DRIVER_GEM))
return (-ENODEV);
dev_priv = dev->dev_private;
ret = i915_mutex_lock_interruptible(dev);
if (ret != 0)
return (ret);
obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle));
if (&obj->base == NULL) {
ret = -ENOENT;
goto unlock;
}
if (obj->base.size > dev_priv->mm.gtt_mappable_end) {
ret = -E2BIG;
goto out;
}
if (obj->madv != I915_MADV_WILLNEED) {
DRM_ERROR("Attempting to mmap a purgeable buffer\n");
ret = -EINVAL;
goto out;
}
ret = drm_gem_create_mmap_offset(&obj->base);
if (ret != 0)
goto out;
*offset = DRM_GEM_MAPPING_OFF(obj->base.map_list.key) |
DRM_GEM_MAPPING_KEY;
out:
drm_gem_object_unreference(&obj->base);
unlock:
DRM_UNLOCK(dev);
return (ret);
}
int
i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_private *dev_priv;
struct drm_i915_gem_mmap_gtt *args;
dev_priv = dev->dev_private;
args = data;
return (i915_gem_mmap_gtt(file, dev, args->handle, &args->offset));
}
struct drm_i915_gem_object *
i915_gem_alloc_object(struct drm_device *dev, size_t size)
{
struct drm_i915_private *dev_priv;
struct drm_i915_gem_object *obj;
dev_priv = dev->dev_private;
obj = malloc(sizeof(*obj), DRM_I915_GEM, M_WAITOK | M_ZERO);
if (drm_gem_object_init(dev, &obj->base, size) != 0) {
free(obj, DRM_I915_GEM);
return (NULL);
}
obj->base.write_domain = I915_GEM_DOMAIN_CPU;
obj->base.read_domains = I915_GEM_DOMAIN_CPU;
if (HAS_LLC(dev))
obj->cache_level = I915_CACHE_LLC;
else
obj->cache_level = I915_CACHE_NONE;
obj->base.driver_private = NULL;
obj->fence_reg = I915_FENCE_REG_NONE;
INIT_LIST_HEAD(&obj->mm_list);
INIT_LIST_HEAD(&obj->gtt_list);
INIT_LIST_HEAD(&obj->ring_list);
INIT_LIST_HEAD(&obj->exec_list);
INIT_LIST_HEAD(&obj->gpu_write_list);
obj->madv = I915_MADV_WILLNEED;
/* Avoid an unnecessary call to unbind on the first bind. */
obj->map_and_fenceable = true;
i915_gem_info_add_obj(dev_priv, size);
return (obj);
}
void
i915_gem_clflush_object(struct drm_i915_gem_object *obj)
{
/* 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->pages == NULL)
return;
/* If the GPU is snooping the contents of the CPU cache,
* we do not need to manually clear the CPU cache lines. However,
* the caches are only snooped when the render cache is
* flushed/invalidated. As we always have to emit invalidations
* and flushes when moving into and out of the RENDER domain, correct
* snooping behaviour occurs naturally as the result of our domain
* tracking.
*/
if (obj->cache_level != I915_CACHE_NONE)
return;
CTR1(KTR_DRM, "object_clflush %p", obj);
drm_clflush_pages(obj->pages, obj->base.size / PAGE_SIZE);
}
static void
i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj)
{
uint32_t old_write_domain;
if (obj->base.write_domain != I915_GEM_DOMAIN_CPU)
return;
i915_gem_clflush_object(obj);
intel_gtt_chipset_flush();
old_write_domain = obj->base.write_domain;
obj->base.write_domain = 0;
CTR3(KTR_DRM, "object_change_domain flush_cpu_write %p %x %x", obj,
obj->base.read_domains, old_write_domain);
}
static int
i915_gem_object_flush_gpu_write_domain(struct drm_i915_gem_object *obj)
{
if ((obj->base.write_domain & I915_GEM_GPU_DOMAINS) == 0)
return (0);
return (i915_gem_flush_ring(obj->ring, 0, obj->base.write_domain));
}
static void
i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj)
{
uint32_t old_write_domain;
if (obj->base.write_domain != I915_GEM_DOMAIN_GTT)
return;
wmb();
old_write_domain = obj->base.write_domain;
obj->base.write_domain = 0;
CTR3(KTR_DRM, "object_change_domain flush gtt_write %p %x %x", obj,
obj->base.read_domains, old_write_domain);
}
int
i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write)
{
uint32_t old_write_domain, old_read_domains;
int ret;
if (obj->gtt_space == NULL)
return (-EINVAL);
if (obj->base.write_domain == I915_GEM_DOMAIN_GTT)
return 0;
ret = i915_gem_object_flush_gpu_write_domain(obj);
if (ret != 0)
return (ret);
if (obj->pending_gpu_write || write) {
ret = i915_gem_object_wait_rendering(obj);
if (ret != 0)
return (ret);
}
i915_gem_object_flush_cpu_write_domain(obj);
old_write_domain = obj->base.write_domain;
old_read_domains = obj->base.read_domains;
KASSERT((obj->base.write_domain & ~I915_GEM_DOMAIN_GTT) == 0,
("In GTT write domain"));
obj->base.read_domains |= I915_GEM_DOMAIN_GTT;
if (write) {
obj->base.read_domains = I915_GEM_DOMAIN_GTT;
obj->base.write_domain = I915_GEM_DOMAIN_GTT;
obj->dirty = 1;
}
CTR3(KTR_DRM, "object_change_domain set_to_gtt %p %x %x", obj,
old_read_domains, old_write_domain);
return (0);
}
int
i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
enum i915_cache_level cache_level)
{
struct drm_device *dev;
drm_i915_private_t *dev_priv;
int ret;
if (obj->cache_level == cache_level)
return 0;
if (obj->pin_count) {
DRM_DEBUG("can not change the cache level of pinned objects\n");
return (-EBUSY);
}
dev = obj->base.dev;
dev_priv = dev->dev_private;
if (obj->gtt_space) {
ret = i915_gem_object_finish_gpu(obj);
if (ret != 0)
return (ret);
i915_gem_object_finish_gtt(obj);
/* Before SandyBridge, you could not use tiling or fence
* registers with snooped memory, so relinquish any fences
* currently pointing to our region in the aperture.
*/
if (INTEL_INFO(obj->base.dev)->gen < 6) {
ret = i915_gem_object_put_fence(obj);
if (ret != 0)
return (ret);
}
i915_gem_gtt_rebind_object(obj, cache_level);
if (obj->has_aliasing_ppgtt_mapping)
i915_ppgtt_bind_object(dev_priv->mm.aliasing_ppgtt,
obj, cache_level);
}
if (cache_level == I915_CACHE_NONE) {
u32 old_read_domains, old_write_domain;
/* If we're coming from LLC cached, then we haven't
* actually been tracking whether the data is in the
* CPU cache or not, since we only allow one bit set
* in obj->write_domain and have been skipping the clflushes.
* Just set it to the CPU cache for now.
*/
KASSERT((obj->base.write_domain & ~I915_GEM_DOMAIN_CPU) == 0,
("obj %p in CPU write domain", obj));
KASSERT((obj->base.read_domains & ~I915_GEM_DOMAIN_CPU) == 0,
("obj %p in CPU read domain", obj));
old_read_domains = obj->base.read_domains;
old_write_domain = obj->base.write_domain;
obj->base.read_domains = I915_GEM_DOMAIN_CPU;
obj->base.write_domain = I915_GEM_DOMAIN_CPU;
CTR3(KTR_DRM, "object_change_domain set_cache_level %p %x %x",
obj, old_read_domains, old_write_domain);
}
obj->cache_level = cache_level;
return (0);
}
int
i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
u32 alignment, struct intel_ring_buffer *pipelined)
{
u32 old_read_domains, old_write_domain;
int ret;
ret = i915_gem_object_flush_gpu_write_domain(obj);
if (ret != 0)
return (ret);
if (pipelined != obj->ring) {
ret = i915_gem_object_wait_rendering(obj);
if (ret == -ERESTART || ret == -EINTR)
return (ret);
}
ret = i915_gem_object_set_cache_level(obj, I915_CACHE_NONE);
if (ret != 0)
return (ret);
ret = i915_gem_object_pin(obj, alignment, true);
if (ret != 0)
return (ret);
i915_gem_object_flush_cpu_write_domain(obj);
old_write_domain = obj->base.write_domain;
old_read_domains = obj->base.read_domains;
KASSERT((obj->base.write_domain & ~I915_GEM_DOMAIN_GTT) == 0,
("obj %p in GTT write domain", obj));
obj->base.read_domains |= I915_GEM_DOMAIN_GTT;
CTR3(KTR_DRM, "object_change_domain pin_to_display_plan %p %x %x",
obj, old_read_domains, obj->base.write_domain);
return (0);
}
int
i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj)
{
int ret;
if ((obj->base.read_domains & I915_GEM_GPU_DOMAINS) == 0)
return (0);
if (obj->base.write_domain & I915_GEM_GPU_DOMAINS) {
ret = i915_gem_flush_ring(obj->ring, 0, obj->base.write_domain);
if (ret != 0)
return (ret);
}
ret = i915_gem_object_wait_rendering(obj);
if (ret != 0)
return (ret);
obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS;
return (0);
}
static int
i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write)
{
uint32_t old_write_domain, old_read_domains;
int ret;
if (obj->base.write_domain == I915_GEM_DOMAIN_CPU)
return 0;
ret = i915_gem_object_flush_gpu_write_domain(obj);
if (ret != 0)
return (ret);
ret = i915_gem_object_wait_rendering(obj);
if (ret != 0)
return (ret);
i915_gem_object_flush_gtt_write_domain(obj);
i915_gem_object_set_to_full_cpu_read_domain(obj);
old_write_domain = obj->base.write_domain;
old_read_domains = obj->base.read_domains;
if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) {
i915_gem_clflush_object(obj);
obj->base.read_domains |= I915_GEM_DOMAIN_CPU;
}
KASSERT((obj->base.write_domain & ~I915_GEM_DOMAIN_CPU) == 0,
("In cpu write domain"));
if (write) {
obj->base.read_domains = I915_GEM_DOMAIN_CPU;
obj->base.write_domain = I915_GEM_DOMAIN_CPU;
}
CTR3(KTR_DRM, "object_change_domain set_to_cpu %p %x %x", obj,
old_read_domains, old_write_domain);
return (0);
}
static void
i915_gem_object_set_to_full_cpu_read_domain(struct drm_i915_gem_object *obj)
{
int i;
if (obj->page_cpu_valid == NULL)
return;
if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) != 0) {
for (i = 0; i <= (obj->base.size - 1) / PAGE_SIZE; i++) {
if (obj->page_cpu_valid[i] != 0)
continue;
drm_clflush_pages(obj->pages + i, 1);
}
}
free(obj->page_cpu_valid, DRM_I915_GEM);
obj->page_cpu_valid = NULL;
}
static int
i915_gem_object_set_cpu_read_domain_range(struct drm_i915_gem_object *obj,
uint64_t offset, uint64_t size)
{
uint32_t old_read_domains;
int i, ret;
if (offset == 0 && size == obj->base.size)
return (i915_gem_object_set_to_cpu_domain(obj, 0));
ret = i915_gem_object_flush_gpu_write_domain(obj);
if (ret != 0)
return (ret);
ret = i915_gem_object_wait_rendering(obj);
if (ret != 0)
return (ret);
i915_gem_object_flush_gtt_write_domain(obj);
if (obj->page_cpu_valid == NULL &&
(obj->base.read_domains & I915_GEM_DOMAIN_CPU) != 0)
return (0);
if (obj->page_cpu_valid == NULL) {
obj->page_cpu_valid = malloc(obj->base.size / PAGE_SIZE,
DRM_I915_GEM, M_WAITOK | M_ZERO);
} else if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0)
memset(obj->page_cpu_valid, 0, obj->base.size / PAGE_SIZE);
for (i = offset / PAGE_SIZE; i <= (offset + size - 1) / PAGE_SIZE;
i++) {
if (obj->page_cpu_valid[i])
continue;
drm_clflush_pages(obj->pages + i, 1);
obj->page_cpu_valid[i] = 1;
}
KASSERT((obj->base.write_domain & ~I915_GEM_DOMAIN_CPU) == 0,
("In gpu write domain"));
old_read_domains = obj->base.read_domains;
obj->base.read_domains |= I915_GEM_DOMAIN_CPU;
CTR3(KTR_DRM, "object_change_domain set_cpu_read %p %x %x", obj,
old_read_domains, obj->base.write_domain);
return (0);
}
static uint32_t
i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size, int tiling_mode)
{
uint32_t gtt_size;
if (INTEL_INFO(dev)->gen >= 4 ||
tiling_mode == I915_TILING_NONE)
return (size);
/* Previous chips need a power-of-two fence region when tiling */
if (INTEL_INFO(dev)->gen == 3)
gtt_size = 1024*1024;
else
gtt_size = 512*1024;
while (gtt_size < size)
gtt_size <<= 1;
return (gtt_size);
}
/**
* i915_gem_get_gtt_alignment - return required GTT alignment for an object
* @obj: object to check
*
* Return the required GTT alignment for an object, taking into account
* potential fence register mapping.
*/
static uint32_t
i915_gem_get_gtt_alignment(struct drm_device *dev, uint32_t size,
int tiling_mode)
{
/*
* Minimum alignment is 4k (GTT page size), but might be greater
* if a fence register is needed for the object.
*/
if (INTEL_INFO(dev)->gen >= 4 ||
tiling_mode == I915_TILING_NONE)
return (4096);
/*
* Previous chips need to be aligned to the size of the smallest
* fence register that can contain the object.
*/
return (i915_gem_get_gtt_size(dev, size, tiling_mode));
}
uint32_t
i915_gem_get_unfenced_gtt_alignment(struct drm_device *dev, uint32_t size,
int tiling_mode)
{
if (tiling_mode == I915_TILING_NONE)
return (4096);
/*
* Minimum alignment is 4k (GTT page size) for sane hw.
*/
if (INTEL_INFO(dev)->gen >= 4 || IS_G33(dev))
return (4096);
/*
* Previous hardware however needs to be aligned to a power-of-two
* tile height. The simplest method for determining this is to reuse
* the power-of-tile object size.
*/
return (i915_gem_get_gtt_size(dev, size, tiling_mode));
}
static int
i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj,
unsigned alignment, bool map_and_fenceable)
{
struct drm_device *dev;
struct drm_i915_private *dev_priv;
struct drm_mm_node *free_space;
uint32_t size, fence_size, fence_alignment, unfenced_alignment;
bool mappable, fenceable;
int ret;
dev = obj->base.dev;
dev_priv = dev->dev_private;
if (obj->madv != I915_MADV_WILLNEED) {
DRM_ERROR("Attempting to bind a purgeable object\n");
return (-EINVAL);
}
fence_size = i915_gem_get_gtt_size(dev, obj->base.size,
obj->tiling_mode);
fence_alignment = i915_gem_get_gtt_alignment(dev, obj->base.size,
obj->tiling_mode);
unfenced_alignment = i915_gem_get_unfenced_gtt_alignment(dev,
obj->base.size, obj->tiling_mode);
if (alignment == 0)
alignment = map_and_fenceable ? fence_alignment :
unfenced_alignment;
if (map_and_fenceable && (alignment & (fence_alignment - 1)) != 0) {
DRM_ERROR("Invalid object alignment requested %u\n", alignment);
return (-EINVAL);
}
size = map_and_fenceable ? fence_size : obj->base.size;
/* If the object is bigger than the entire aperture, reject it early
* before evicting everything in a vain attempt to find space.
*/
if (obj->base.size > (map_and_fenceable ?
dev_priv->mm.gtt_mappable_end : dev_priv->mm.gtt_total)) {
DRM_ERROR(
"Attempting to bind an object larger than the aperture\n");
return (-E2BIG);
}
search_free:
if (map_and_fenceable)
free_space = drm_mm_search_free_in_range(
&dev_priv->mm.gtt_space, size, alignment, 0,
dev_priv->mm.gtt_mappable_end, 0);
else
free_space = drm_mm_search_free(&dev_priv->mm.gtt_space,
size, alignment, 0);
if (free_space != NULL) {
if (map_and_fenceable)
obj->gtt_space = drm_mm_get_block_range_generic(
free_space, size, alignment, 0,
dev_priv->mm.gtt_mappable_end, 1);
else
obj->gtt_space = drm_mm_get_block_generic(free_space,
size, alignment, 1);
}
if (obj->gtt_space == NULL) {
ret = i915_gem_evict_something(dev, size, alignment,
map_and_fenceable);
if (ret != 0)
return (ret);
goto search_free;
}
ret = i915_gem_object_get_pages_gtt(obj, 0);
if (ret != 0) {
drm_mm_put_block(obj->gtt_space);
obj->gtt_space = NULL;
/*
* i915_gem_object_get_pages_gtt() cannot return
* ENOMEM, since we use vm_page_grab(VM_ALLOC_RETRY)
* (which does not support operation without a flag
* anyway).
*/
return (ret);
}
ret = i915_gem_gtt_bind_object(obj);
if (ret != 0) {
i915_gem_object_put_pages_gtt(obj);
drm_mm_put_block(obj->gtt_space);
obj->gtt_space = NULL;
if (i915_gem_evict_everything(dev, false))
return (ret);
goto search_free;
}
list_add_tail(&obj->gtt_list, &dev_priv->mm.gtt_list);
list_add_tail(&obj->mm_list, &dev_priv->mm.inactive_list);
KASSERT((obj->base.read_domains & I915_GEM_GPU_DOMAINS) == 0,
("Object in gpu read domain"));
KASSERT((obj->base.write_domain & I915_GEM_GPU_DOMAINS) == 0,
("Object in gpu write domain"));
obj->gtt_offset = obj->gtt_space->start;
fenceable =
obj->gtt_space->size == fence_size &&
(obj->gtt_space->start & (fence_alignment - 1)) == 0;
mappable =
obj->gtt_offset + obj->base.size <= dev_priv->mm.gtt_mappable_end;
obj->map_and_fenceable = mappable && fenceable;
CTR4(KTR_DRM, "object_bind %p %x %x %d", obj, obj->gtt_offset,
obj->base.size, map_and_fenceable);
return (0);
}
static void
i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj)
{
u32 old_write_domain, old_read_domains;
/* Act a barrier for all accesses through the GTT */
mb();
/* Force a pagefault for domain tracking on next user access */
i915_gem_release_mmap(obj);
if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0)
return;
old_read_domains = obj->base.read_domains;
old_write_domain = obj->base.write_domain;
obj->base.read_domains &= ~I915_GEM_DOMAIN_GTT;
obj->base.write_domain &= ~I915_GEM_DOMAIN_GTT;
CTR3(KTR_DRM, "object_change_domain finish gtt %p %x %x",
obj, old_read_domains, old_write_domain);
}
int
i915_gem_object_unbind(struct drm_i915_gem_object *obj)
{
drm_i915_private_t *dev_priv;
int ret;
dev_priv = obj->base.dev->dev_private;
ret = 0;
if (obj->gtt_space == NULL)
return (0);
if (obj->pin_count != 0) {
DRM_ERROR("Attempting to unbind pinned buffer\n");
return (-EINVAL);
}
ret = i915_gem_object_finish_gpu(obj);
if (ret == -ERESTART || ret == -EINTR)
return (ret);
i915_gem_object_finish_gtt(obj);
if (ret == 0)
ret = i915_gem_object_set_to_cpu_domain(obj, 1);
if (ret == -ERESTART || ret == -EINTR)
return (ret);
if (ret != 0) {
i915_gem_clflush_object(obj);
obj->base.read_domains = obj->base.write_domain =
I915_GEM_DOMAIN_CPU;
}
ret = i915_gem_object_put_fence(obj);
if (ret == -ERESTART)
return (ret);
i915_gem_gtt_unbind_object(obj);
if (obj->has_aliasing_ppgtt_mapping) {
i915_ppgtt_unbind_object(dev_priv->mm.aliasing_ppgtt, obj);
obj->has_aliasing_ppgtt_mapping = 0;
}
i915_gem_object_put_pages_gtt(obj);
list_del_init(&obj->gtt_list);
list_del_init(&obj->mm_list);
obj->map_and_fenceable = true;
drm_mm_put_block(obj->gtt_space);
obj->gtt_space = NULL;
obj->gtt_offset = 0;
if (i915_gem_object_is_purgeable(obj))
i915_gem_object_truncate(obj);
CTR1(KTR_DRM, "object_unbind %p", obj);
return (ret);
}
static int
i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj,
int flags)
{
struct drm_device *dev;
vm_object_t vm_obj;
vm_page_t m;
int page_count, i, j;
dev = obj->base.dev;
KASSERT(obj->pages == NULL, ("Obj already has pages"));
page_count = obj->base.size / PAGE_SIZE;
obj->pages = malloc(page_count * sizeof(vm_page_t), DRM_I915_GEM,
M_WAITOK);
vm_obj = obj->base.vm_obj;
VM_OBJECT_WLOCK(vm_obj);
for (i = 0; i < page_count; i++) {
if ((obj->pages[i] = i915_gem_wire_page(vm_obj, i)) == NULL)
goto failed;
}
VM_OBJECT_WUNLOCK(vm_obj);
if (i915_gem_object_needs_bit17_swizzle(obj))
i915_gem_object_do_bit_17_swizzle(obj);
return (0);
failed:
for (j = 0; j < i; j++) {
m = obj->pages[j];
vm_page_lock(m);
vm_page_unwire(m, 0);
vm_page_unlock(m);
atomic_add_long(&i915_gem_wired_pages_cnt, -1);
}
VM_OBJECT_WUNLOCK(vm_obj);
free(obj->pages, DRM_I915_GEM);
obj->pages = NULL;
return (-EIO);
}
#define GEM_PARANOID_CHECK_GTT 0
#if GEM_PARANOID_CHECK_GTT
static void
i915_gem_assert_pages_not_mapped(struct drm_device *dev, vm_page_t *ma,
int page_count)
{
struct drm_i915_private *dev_priv;
vm_paddr_t pa;
unsigned long start, end;
u_int i;
int j;
dev_priv = dev->dev_private;
start = OFF_TO_IDX(dev_priv->mm.gtt_start);
end = OFF_TO_IDX(dev_priv->mm.gtt_end);
for (i = start; i < end; i++) {
pa = intel_gtt_read_pte_paddr(i);
for (j = 0; j < page_count; j++) {
if (pa == VM_PAGE_TO_PHYS(ma[j])) {
panic("Page %p in GTT pte index %d pte %x",
ma[i], i, intel_gtt_read_pte(i));
}
}
}
}
#endif
static void
i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj)
{
vm_page_t m;
int page_count, i;
KASSERT(obj->madv != I915_MADV_PURGED_INTERNAL, ("Purged object"));
if (obj->tiling_mode != I915_TILING_NONE)
i915_gem_object_save_bit_17_swizzle(obj);
if (obj->madv == I915_MADV_DONTNEED)
obj->dirty = 0;
page_count = obj->base.size / PAGE_SIZE;
VM_OBJECT_WLOCK(obj->base.vm_obj);
#if GEM_PARANOID_CHECK_GTT
i915_gem_assert_pages_not_mapped(obj->base.dev, obj->pages, page_count);
#endif
for (i = 0; i < page_count; i++) {
m = obj->pages[i];
if (obj->dirty)
vm_page_dirty(m);
if (obj->madv == I915_MADV_WILLNEED)
vm_page_reference(m);
vm_page_lock(m);
vm_page_unwire(obj->pages[i], 1);
vm_page_unlock(m);
atomic_add_long(&i915_gem_wired_pages_cnt, -1);
}
VM_OBJECT_WUNLOCK(obj->base.vm_obj);
obj->dirty = 0;
free(obj->pages, DRM_I915_GEM);
obj->pages = NULL;
}
void
i915_gem_release_mmap(struct drm_i915_gem_object *obj)
{
vm_object_t devobj;
vm_page_t m;
int i, page_count;
if (!obj->fault_mappable)
return;
CTR3(KTR_DRM, "release_mmap %p %x %x", obj, obj->gtt_offset,
OFF_TO_IDX(obj->base.size));
devobj = cdev_pager_lookup(obj);
if (devobj != NULL) {
page_count = OFF_TO_IDX(obj->base.size);
VM_OBJECT_WLOCK(devobj);
retry:
for (i = 0; i < page_count; i++) {
m = vm_page_lookup(devobj, i);
if (m == NULL)
continue;
if (vm_page_sleep_if_busy(m, true, "915unm"))
goto retry;
cdev_pager_free_page(devobj, m);
}
VM_OBJECT_WUNLOCK(devobj);
vm_object_deallocate(devobj);
}
obj->fault_mappable = false;
}
int
i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj)
{
int ret;
KASSERT((obj->base.write_domain & I915_GEM_GPU_DOMAINS) == 0,
("In GPU write domain"));
CTR5(KTR_DRM, "object_wait_rendering %p %s %x %d %d", obj,
obj->ring != NULL ? obj->ring->name : "none", obj->gtt_offset,
obj->active, obj->last_rendering_seqno);
if (obj->active) {
ret = i915_wait_request(obj->ring, obj->last_rendering_seqno,
true);
if (ret != 0)
return (ret);
}
return (0);
}
void
i915_gem_object_move_to_active(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *ring, uint32_t seqno)
{
struct drm_device *dev = obj->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_fence_reg *reg;
obj->ring = ring;
KASSERT(ring != NULL, ("NULL ring"));
/* Add a reference if we're newly entering the active list. */
if (!obj->active) {
drm_gem_object_reference(&obj->base);
obj->active = 1;
}
/* Move from whatever list we were on to the tail of execution. */
list_move_tail(&obj->mm_list, &dev_priv->mm.active_list);
list_move_tail(&obj->ring_list, &ring->active_list);
obj->last_rendering_seqno = seqno;
if (obj->fenced_gpu_access) {
obj->last_fenced_seqno = seqno;
obj->last_fenced_ring = ring;
/* Bump MRU to take account of the delayed flush */
if (obj->fence_reg != I915_FENCE_REG_NONE) {
reg = &dev_priv->fence_regs[obj->fence_reg];
list_move_tail(&reg->lru_list,
&dev_priv->mm.fence_list);
}
}
}
static void
i915_gem_object_move_off_active(struct drm_i915_gem_object *obj)
{
list_del_init(&obj->ring_list);
obj->last_rendering_seqno = 0;
obj->last_fenced_seqno = 0;
}
static void
i915_gem_object_move_to_flushing(struct drm_i915_gem_object *obj)
{
struct drm_device *dev = obj->base.dev;
drm_i915_private_t *dev_priv = dev->dev_private;
KASSERT(obj->active, ("Object not active"));
list_move_tail(&obj->mm_list, &dev_priv->mm.flushing_list);
i915_gem_object_move_off_active(obj);
}
static void
i915_gem_object_move_to_inactive(struct drm_i915_gem_object *obj)
{
struct drm_device *dev = obj->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
if (obj->pin_count != 0)
list_move_tail(&obj->mm_list, &dev_priv->mm.pinned_list);
else
list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list);
KASSERT(list_empty(&obj->gpu_write_list), ("On gpu_write_list"));
KASSERT(obj->active, ("Object not active"));
obj->ring = NULL;
obj->last_fenced_ring = NULL;
i915_gem_object_move_off_active(obj);
obj->fenced_gpu_access = false;
obj->active = 0;
obj->pending_gpu_write = false;
drm_gem_object_unreference(&obj->base);
#if 1
KIB_NOTYET();
#else
WARN_ON(i915_verify_lists(dev));
#endif
}
static void
i915_gem_object_truncate(struct drm_i915_gem_object *obj)
{
vm_object_t vm_obj;
vm_obj = obj->base.vm_obj;
VM_OBJECT_WLOCK(vm_obj);
vm_object_page_remove(vm_obj, 0, 0, false);
VM_OBJECT_WUNLOCK(vm_obj);
obj->madv = I915_MADV_PURGED_INTERNAL;
}
static inline int
i915_gem_object_is_purgeable(struct drm_i915_gem_object *obj)
{
return (obj->madv == I915_MADV_DONTNEED);
}
static void
i915_gem_process_flushing_list(struct intel_ring_buffer *ring,
uint32_t flush_domains)
{
struct drm_i915_gem_object *obj, *next;
uint32_t old_write_domain;
list_for_each_entry_safe(obj, next, &ring->gpu_write_list,
gpu_write_list) {
if (obj->base.write_domain & flush_domains) {
old_write_domain = obj->base.write_domain;
obj->base.write_domain = 0;
list_del_init(&obj->gpu_write_list);
i915_gem_object_move_to_active(obj, ring,
i915_gem_next_request_seqno(ring));
CTR3(KTR_DRM, "object_change_domain process_flush %p %x %x",
obj, obj->base.read_domains, old_write_domain);
}
}
}
static int
i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_object *obj)
{
drm_i915_private_t *dev_priv;
dev_priv = obj->base.dev->dev_private;
return (dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_9_10_17 &&
obj->tiling_mode != I915_TILING_NONE);
}
static vm_page_t
i915_gem_wire_page(vm_object_t object, vm_pindex_t pindex)
{
vm_page_t m;
int rv;
VM_OBJECT_ASSERT_WLOCKED(object);
m = vm_page_grab(object, pindex, VM_ALLOC_NORMAL | VM_ALLOC_RETRY);
if (m->valid != VM_PAGE_BITS_ALL) {
if (vm_pager_has_page(object, pindex, NULL, NULL)) {
rv = vm_pager_get_pages(object, &m, 1, 0);
m = vm_page_lookup(object, pindex);
if (m == NULL)
return (NULL);
if (rv != VM_PAGER_OK) {
vm_page_lock(m);
vm_page_free(m);
vm_page_unlock(m);
return (NULL);
}
} else {
pmap_zero_page(m);
m->valid = VM_PAGE_BITS_ALL;
m->dirty = 0;
}
}
vm_page_lock(m);
vm_page_wire(m);
vm_page_unlock(m);
vm_page_wakeup(m);
atomic_add_long(&i915_gem_wired_pages_cnt, 1);
return (m);
}
int
i915_gem_flush_ring(struct intel_ring_buffer *ring, uint32_t invalidate_domains,
uint32_t flush_domains)
{
int ret;
if (((invalidate_domains | flush_domains) & I915_GEM_GPU_DOMAINS) == 0)
return 0;
CTR3(KTR_DRM, "ring_flush %s %x %x", ring->name, invalidate_domains,
flush_domains);
ret = ring->flush(ring, invalidate_domains, flush_domains);
if (ret)
return ret;
if (flush_domains & I915_GEM_GPU_DOMAINS)
i915_gem_process_flushing_list(ring, flush_domains);
return 0;
}
static int
i915_ring_idle(struct intel_ring_buffer *ring, bool do_retire)
{
int ret;
if (list_empty(&ring->gpu_write_list) && list_empty(&ring->active_list))
return 0;
if (!list_empty(&ring->gpu_write_list)) {
ret = i915_gem_flush_ring(ring, I915_GEM_GPU_DOMAINS,
I915_GEM_GPU_DOMAINS);
if (ret != 0)
return ret;
}
return (i915_wait_request(ring, i915_gem_next_request_seqno(ring),
do_retire));
}
int
i915_gpu_idle(struct drm_device *dev, bool do_retire)
{
drm_i915_private_t *dev_priv = dev->dev_private;
int ret, i;
/* Flush everything onto the inactive list. */
for (i = 0; i < I915_NUM_RINGS; i++) {
ret = i915_ring_idle(&dev_priv->rings[i], do_retire);
if (ret)
return ret;
}
return 0;
}
int
i915_wait_request(struct intel_ring_buffer *ring, uint32_t seqno, bool do_retire)
{
drm_i915_private_t *dev_priv;
struct drm_i915_gem_request *request;
uint32_t ier;
int flags, ret;
bool recovery_complete;
KASSERT(seqno != 0, ("Zero seqno"));
dev_priv = ring->dev->dev_private;
ret = 0;
if (atomic_load_acq_int(&dev_priv->mm.wedged) != 0) {
/* Give the error handler a chance to run. */
mtx_lock(&dev_priv->error_completion_lock);
recovery_complete = (&dev_priv->error_completion) > 0;
mtx_unlock(&dev_priv->error_completion_lock);
return (recovery_complete ? -EIO : -EAGAIN);
}
if (seqno == ring->outstanding_lazy_request) {
request = malloc(sizeof(*request), DRM_I915_GEM,
M_WAITOK | M_ZERO);
if (request == NULL)
return (-ENOMEM);
ret = i915_add_request(ring, NULL, request);
if (ret != 0) {
free(request, DRM_I915_GEM);
return (ret);
}
seqno = request->seqno;
}
if (!i915_seqno_passed(ring->get_seqno(ring), seqno)) {
if (HAS_PCH_SPLIT(ring->dev))
ier = I915_READ(DEIER) | I915_READ(GTIER);
else
ier = I915_READ(IER);
if (!ier) {
DRM_ERROR("something (likely vbetool) disabled "
"interrupts, re-enabling\n");
ring->dev->driver->irq_preinstall(ring->dev);
ring->dev->driver->irq_postinstall(ring->dev);
}
CTR2(KTR_DRM, "request_wait_begin %s %d", ring->name, seqno);
ring->waiting_seqno = seqno;
mtx_lock(&ring->irq_lock);
if (ring->irq_get(ring)) {
flags = dev_priv->mm.interruptible ? PCATCH : 0;
while (!i915_seqno_passed(ring->get_seqno(ring), seqno)
&& !atomic_load_acq_int(&dev_priv->mm.wedged) &&
ret == 0) {
ret = -msleep(ring, &ring->irq_lock, flags,
"915gwr", 0);
}
ring->irq_put(ring);
mtx_unlock(&ring->irq_lock);
} else {
mtx_unlock(&ring->irq_lock);
if (_intel_wait_for(ring->dev,
i915_seqno_passed(ring->get_seqno(ring), seqno) ||
atomic_load_acq_int(&dev_priv->mm.wedged), 3000,
0, "i915wrq") != 0)
ret = -EBUSY;
}
ring->waiting_seqno = 0;
CTR3(KTR_DRM, "request_wait_end %s %d %d", ring->name, seqno,
ret);
}
if (atomic_load_acq_int(&dev_priv->mm.wedged))
ret = -EAGAIN;
/* 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 && do_retire)
i915_gem_retire_requests_ring(ring);
return (ret);
}
static u32
i915_gem_get_seqno(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
u32 seqno = dev_priv->next_seqno;
/* reserve 0 for non-seqno */
if (++dev_priv->next_seqno == 0)
dev_priv->next_seqno = 1;
return seqno;
}
u32
i915_gem_next_request_seqno(struct intel_ring_buffer *ring)
{
if (ring->outstanding_lazy_request == 0)
ring->outstanding_lazy_request = i915_gem_get_seqno(ring->dev);
return ring->outstanding_lazy_request;
}
int
i915_add_request(struct intel_ring_buffer *ring, struct drm_file *file,
struct drm_i915_gem_request *request)
{
drm_i915_private_t *dev_priv;
struct drm_i915_file_private *file_priv;
uint32_t seqno;
u32 request_ring_position;
int was_empty;
int ret;
KASSERT(request != NULL, ("NULL request in add"));
DRM_LOCK_ASSERT(ring->dev);
dev_priv = ring->dev->dev_private;
seqno = i915_gem_next_request_seqno(ring);
request_ring_position = intel_ring_get_tail(ring);
ret = ring->add_request(ring, &seqno);
if (ret != 0)
return ret;
CTR2(KTR_DRM, "request_add %s %d", ring->name, seqno);
request->seqno = seqno;
request->ring = ring;
request->tail = request_ring_position;
request->emitted_jiffies = ticks;
was_empty = list_empty(&ring->request_list);
list_add_tail(&request->list, &ring->request_list);
if (file != NULL) {
file_priv = file->driver_priv;
mtx_lock(&file_priv->mm.lck);
request->file_priv = file_priv;
list_add_tail(&request->client_list,
&file_priv->mm.request_list);
mtx_unlock(&file_priv->mm.lck);
}
ring->outstanding_lazy_request = 0;
if (!dev_priv->mm.suspended) {
if (i915_enable_hangcheck) {
callout_schedule(&dev_priv->hangcheck_timer,
DRM_I915_HANGCHECK_PERIOD);
}
if (was_empty)
taskqueue_enqueue_timeout(dev_priv->tq,
&dev_priv->mm.retire_task, hz);
}
return (0);
}
static inline void
i915_gem_request_remove_from_client(struct drm_i915_gem_request *request)
{
struct drm_i915_file_private *file_priv = request->file_priv;
if (!file_priv)
return;
DRM_LOCK_ASSERT(request->ring->dev);
mtx_lock(&file_priv->mm.lck);
if (request->file_priv != NULL) {
list_del(&request->client_list);
request->file_priv = NULL;
}
mtx_unlock(&file_priv->mm.lck);
}
void
i915_gem_release(struct drm_device *dev, struct drm_file *file)
{
struct drm_i915_file_private *file_priv;
struct drm_i915_gem_request *request;
file_priv = file->driver_priv;
/* Clean up our request list when the client is going away, so that
* later retire_requests won't dereference our soon-to-be-gone
* file_priv.
*/
mtx_lock(&file_priv->mm.lck);
while (!list_empty(&file_priv->mm.request_list)) {
request = list_first_entry(&file_priv->mm.request_list,
struct drm_i915_gem_request,
client_list);
list_del(&request->client_list);
request->file_priv = NULL;
}
mtx_unlock(&file_priv->mm.lck);
}
static void
i915_gem_reset_ring_lists(struct drm_i915_private *dev_priv,
struct intel_ring_buffer *ring)
{
if (ring->dev != NULL)
DRM_LOCK_ASSERT(ring->dev);
while (!list_empty(&ring->request_list)) {
struct drm_i915_gem_request *request;
request = list_first_entry(&ring->request_list,
struct drm_i915_gem_request, list);
list_del(&request->list);
i915_gem_request_remove_from_client(request);
free(request, DRM_I915_GEM);
}
while (!list_empty(&ring->active_list)) {
struct drm_i915_gem_object *obj;
obj = list_first_entry(&ring->active_list,
struct drm_i915_gem_object, ring_list);
obj->base.write_domain = 0;
list_del_init(&obj->gpu_write_list);
i915_gem_object_move_to_inactive(obj);
}
}
static void
i915_gem_reset_fences(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int i;
for (i = 0; i < dev_priv->num_fence_regs; i++) {
struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i];
struct drm_i915_gem_object *obj = reg->obj;
if (!obj)
continue;
if (obj->tiling_mode)
i915_gem_release_mmap(obj);
reg->obj->fence_reg = I915_FENCE_REG_NONE;
reg->obj->fenced_gpu_access = false;
reg->obj->last_fenced_seqno = 0;
reg->obj->last_fenced_ring = NULL;
i915_gem_clear_fence_reg(dev, reg);
}
}
void
i915_gem_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_gem_object *obj;
int i;
for (i = 0; i < I915_NUM_RINGS; i++)
i915_gem_reset_ring_lists(dev_priv, &dev_priv->rings[i]);
/* Remove anything from the flushing lists. The GPU cache is likely
* to be lost on reset along with the data, so simply move the
* lost bo to the inactive list.
*/
while (!list_empty(&dev_priv->mm.flushing_list)) {
obj = list_first_entry(&dev_priv->mm.flushing_list,
struct drm_i915_gem_object,
mm_list);
obj->base.write_domain = 0;
list_del_init(&obj->gpu_write_list);
i915_gem_object_move_to_inactive(obj);
}
/* Move everything out of the GPU domains to ensure we do any
* necessary invalidation upon reuse.
*/
list_for_each_entry(obj, &dev_priv->mm.inactive_list, mm_list) {
obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS;
}
/* The fence registers are invalidated so clear them out */
i915_gem_reset_fences(dev);
}
/**
* This function clears the request list as sequence numbers are passed.
*/
void
i915_gem_retire_requests_ring(struct intel_ring_buffer *ring)
{
uint32_t seqno;
int i;
if (list_empty(&ring->request_list))
return;
seqno = ring->get_seqno(ring);
CTR2(KTR_DRM, "retire_request_ring %s %d", ring->name, seqno);
for (i = 0; i < DRM_ARRAY_SIZE(ring->sync_seqno); i++)
if (seqno >= ring->sync_seqno[i])
ring->sync_seqno[i] = 0;
while (!list_empty(&ring->request_list)) {
struct drm_i915_gem_request *request;
request = list_first_entry(&ring->request_list,
struct drm_i915_gem_request,
list);
if (!i915_seqno_passed(seqno, request->seqno))
break;
CTR2(KTR_DRM, "retire_request_seqno_passed %s %d",
ring->name, seqno);
ring->last_retired_head = request->tail;
list_del(&request->list);
i915_gem_request_remove_from_client(request);
free(request, DRM_I915_GEM);
}
/* 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(&ring->active_list)) {
struct drm_i915_gem_object *obj;
obj = list_first_entry(&ring->active_list,
struct drm_i915_gem_object,
ring_list);
if (!i915_seqno_passed(seqno, obj->last_rendering_seqno))
break;
if (obj->base.write_domain != 0)
i915_gem_object_move_to_flushing(obj);
else
i915_gem_object_move_to_inactive(obj);
}
if (ring->trace_irq_seqno &&
i915_seqno_passed(seqno, ring->trace_irq_seqno)) {
mtx_lock(&ring->irq_lock);
ring->irq_put(ring);
mtx_unlock(&ring->irq_lock);
ring->trace_irq_seqno = 0;
}
}
void
i915_gem_retire_requests(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_i915_gem_object *obj, *next;
int i;
if (!list_empty(&dev_priv->mm.deferred_free_list)) {
list_for_each_entry_safe(obj, next,
&dev_priv->mm.deferred_free_list, mm_list)
i915_gem_free_object_tail(obj);
}
for (i = 0; i < I915_NUM_RINGS; i++)
i915_gem_retire_requests_ring(&dev_priv->rings[i]);
}
static int
sandybridge_write_fence_reg(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *pipelined)
{
struct drm_device *dev = obj->base.dev;
drm_i915_private_t *dev_priv = dev->dev_private;
u32 size = obj->gtt_space->size;
int regnum = obj->fence_reg;
uint64_t val;
val = (uint64_t)((obj->gtt_offset + size - 4096) &
0xfffff000) << 32;
val |= obj->gtt_offset & 0xfffff000;
val |= (uint64_t)((obj->stride / 128) - 1) <<
SANDYBRIDGE_FENCE_PITCH_SHIFT;
if (obj->tiling_mode == I915_TILING_Y)
val |= 1 << I965_FENCE_TILING_Y_SHIFT;
val |= I965_FENCE_REG_VALID;
if (pipelined) {
int ret = intel_ring_begin(pipelined, 6);
if (ret)
return ret;
intel_ring_emit(pipelined, MI_NOOP);
intel_ring_emit(pipelined, MI_LOAD_REGISTER_IMM(2));
intel_ring_emit(pipelined, FENCE_REG_SANDYBRIDGE_0 + regnum*8);
intel_ring_emit(pipelined, (u32)val);
intel_ring_emit(pipelined, FENCE_REG_SANDYBRIDGE_0 + regnum*8 + 4);
intel_ring_emit(pipelined, (u32)(val >> 32));
intel_ring_advance(pipelined);
} else
I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + regnum * 8, val);
return 0;
}
static int
i965_write_fence_reg(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *pipelined)
{
struct drm_device *dev = obj->base.dev;
drm_i915_private_t *dev_priv = dev->dev_private;
u32 size = obj->gtt_space->size;
int regnum = obj->fence_reg;
uint64_t val;
val = (uint64_t)((obj->gtt_offset + size - 4096) &
0xfffff000) << 32;
val |= obj->gtt_offset & 0xfffff000;
val |= ((obj->stride / 128) - 1) << I965_FENCE_PITCH_SHIFT;
if (obj->tiling_mode == I915_TILING_Y)
val |= 1 << I965_FENCE_TILING_Y_SHIFT;
val |= I965_FENCE_REG_VALID;
if (pipelined) {
int ret = intel_ring_begin(pipelined, 6);
if (ret)
return ret;
intel_ring_emit(pipelined, MI_NOOP);
intel_ring_emit(pipelined, MI_LOAD_REGISTER_IMM(2));
intel_ring_emit(pipelined, FENCE_REG_965_0 + regnum*8);
intel_ring_emit(pipelined, (u32)val);
intel_ring_emit(pipelined, FENCE_REG_965_0 + regnum*8 + 4);
intel_ring_emit(pipelined, (u32)(val >> 32));
intel_ring_advance(pipelined);
} else
I915_WRITE64(FENCE_REG_965_0 + regnum * 8, val);
return 0;
}
static int
i915_write_fence_reg(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *pipelined)
{
struct drm_device *dev = obj->base.dev;
drm_i915_private_t *dev_priv = dev->dev_private;
u32 size = obj->gtt_space->size;
u32 fence_reg, val, pitch_val;
int tile_width;
if ((obj->gtt_offset & ~I915_FENCE_START_MASK) ||
(size & -size) != size || (obj->gtt_offset & (size - 1))) {
printf(
"object 0x%08x [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n",
obj->gtt_offset, obj->map_and_fenceable, size);
return -EINVAL;
}
if (obj->tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev))
tile_width = 128;
else
tile_width = 512;
/* Note: pitch better be a power of two tile widths */
pitch_val = obj->stride / tile_width;
pitch_val = ffs(pitch_val) - 1;
val = obj->gtt_offset;
if (obj->tiling_mode == I915_TILING_Y)
val |= 1 << I830_FENCE_TILING_Y_SHIFT;
val |= I915_FENCE_SIZE_BITS(size);
val |= pitch_val << I830_FENCE_PITCH_SHIFT;
val |= I830_FENCE_REG_VALID;
fence_reg = obj->fence_reg;
if (fence_reg < 8)
fence_reg = FENCE_REG_830_0 + fence_reg * 4;
else
fence_reg = FENCE_REG_945_8 + (fence_reg - 8) * 4;
if (pipelined) {
int ret = intel_ring_begin(pipelined, 4);
if (ret)
return ret;
intel_ring_emit(pipelined, MI_NOOP);
intel_ring_emit(pipelined, MI_LOAD_REGISTER_IMM(1));
intel_ring_emit(pipelined, fence_reg);
intel_ring_emit(pipelined, val);
intel_ring_advance(pipelined);
} else
I915_WRITE(fence_reg, val);
return 0;
}
static int
i830_write_fence_reg(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *pipelined)
{
struct drm_device *dev = obj->base.dev;
drm_i915_private_t *dev_priv = dev->dev_private;
u32 size = obj->gtt_space->size;
int regnum = obj->fence_reg;
uint32_t val;
uint32_t pitch_val;
if ((obj->gtt_offset & ~I830_FENCE_START_MASK) ||
(size & -size) != size || (obj->gtt_offset & (size - 1))) {
printf(
"object 0x%08x not 512K or pot-size 0x%08x aligned\n",
obj->gtt_offset, size);
return -EINVAL;
}
pitch_val = obj->stride / 128;
pitch_val = ffs(pitch_val) - 1;
val = obj->gtt_offset;
if (obj->tiling_mode == I915_TILING_Y)
val |= 1 << I830_FENCE_TILING_Y_SHIFT;
val |= I830_FENCE_SIZE_BITS(size);
val |= pitch_val << I830_FENCE_PITCH_SHIFT;
val |= I830_FENCE_REG_VALID;
if (pipelined) {
int ret = intel_ring_begin(pipelined, 4);
if (ret)
return ret;
intel_ring_emit(pipelined, MI_NOOP);
intel_ring_emit(pipelined, MI_LOAD_REGISTER_IMM(1));
intel_ring_emit(pipelined, FENCE_REG_830_0 + regnum*4);
intel_ring_emit(pipelined, val);
intel_ring_advance(pipelined);
} else
I915_WRITE(FENCE_REG_830_0 + regnum * 4, val);
return 0;
}
static bool ring_passed_seqno(struct intel_ring_buffer *ring, u32 seqno)
{
return i915_seqno_passed(ring->get_seqno(ring), seqno);
}
static int
i915_gem_object_flush_fence(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *pipelined)
{
int ret;
if (obj->fenced_gpu_access) {
if (obj->base.write_domain & I915_GEM_GPU_DOMAINS) {
ret = i915_gem_flush_ring(obj->last_fenced_ring, 0,
obj->base.write_domain);
if (ret)
return ret;
}
obj->fenced_gpu_access = false;
}
if (obj->last_fenced_seqno && pipelined != obj->last_fenced_ring) {
if (!ring_passed_seqno(obj->last_fenced_ring,
obj->last_fenced_seqno)) {
ret = i915_wait_request(obj->last_fenced_ring,
obj->last_fenced_seqno,
true);
if (ret)
return ret;
}
obj->last_fenced_seqno = 0;
obj->last_fenced_ring = NULL;
}
/* Ensure that all CPU reads are completed before installing a fence
* and all writes before removing the fence.
*/
if (obj->base.read_domains & I915_GEM_DOMAIN_GTT)
mb();
return 0;
}
int
i915_gem_object_put_fence(struct drm_i915_gem_object *obj)
{
int ret;
if (obj->tiling_mode)
i915_gem_release_mmap(obj);
ret = i915_gem_object_flush_fence(obj, NULL);
if (ret)
return ret;
if (obj->fence_reg != I915_FENCE_REG_NONE) {
struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
if (dev_priv->fence_regs[obj->fence_reg].pin_count != 0)
printf("%s: pin_count %d\n", __func__,
dev_priv->fence_regs[obj->fence_reg].pin_count);
i915_gem_clear_fence_reg(obj->base.dev,
&dev_priv->fence_regs[obj->fence_reg]);
obj->fence_reg = I915_FENCE_REG_NONE;
}
return 0;
}
static struct drm_i915_fence_reg *
i915_find_fence_reg(struct drm_device *dev, struct intel_ring_buffer *pipelined)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_fence_reg *reg, *first, *avail;
int i;
/* First try to find a free reg */
avail = NULL;
for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) {
reg = &dev_priv->fence_regs[i];
if (!reg->obj)
return reg;
if (!reg->pin_count)
avail = reg;
}
if (avail == NULL)
return NULL;
/* None available, try to steal one or wait for a user to finish */
avail = first = NULL;
list_for_each_entry(reg, &dev_priv->mm.fence_list, lru_list) {
if (reg->pin_count)
continue;
if (first == NULL)
first = reg;
if (!pipelined ||
!reg->obj->last_fenced_ring ||
reg->obj->last_fenced_ring == pipelined) {
avail = reg;
break;
}
}
if (avail == NULL)
avail = first;
return avail;
}
int
i915_gem_object_get_fence(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *pipelined)
{
struct drm_device *dev = obj->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_fence_reg *reg;
int ret;
pipelined = NULL;
ret = 0;
if (obj->fence_reg != I915_FENCE_REG_NONE) {
reg = &dev_priv->fence_regs[obj->fence_reg];
list_move_tail(&reg->lru_list, &dev_priv->mm.fence_list);
if (obj->tiling_changed) {
ret = i915_gem_object_flush_fence(obj, pipelined);
if (ret)
return ret;
if (!obj->fenced_gpu_access && !obj->last_fenced_seqno)
pipelined = NULL;
if (pipelined) {
reg->setup_seqno =
i915_gem_next_request_seqno(pipelined);
obj->last_fenced_seqno = reg->setup_seqno;
obj->last_fenced_ring = pipelined;
}
goto update;
}
if (!pipelined) {
if (reg->setup_seqno) {
if (!ring_passed_seqno(obj->last_fenced_ring,
reg->setup_seqno)) {
ret = i915_wait_request(
obj->last_fenced_ring,
reg->setup_seqno,
true);
if (ret)
return ret;
}
reg->setup_seqno = 0;
}
} else if (obj->last_fenced_ring &&
obj->last_fenced_ring != pipelined) {
ret = i915_gem_object_flush_fence(obj, pipelined);
if (ret)
return ret;
}
if (!obj->fenced_gpu_access && !obj->last_fenced_seqno)
pipelined = NULL;
KASSERT(pipelined || reg->setup_seqno == 0, ("!pipelined"));
if (obj->tiling_changed) {
if (pipelined) {
reg->setup_seqno =
i915_gem_next_request_seqno(pipelined);
obj->last_fenced_seqno = reg->setup_seqno;
obj->last_fenced_ring = pipelined;
}
goto update;
}
return 0;
}
reg = i915_find_fence_reg(dev, pipelined);
if (reg == NULL)
return -EDEADLK;
ret = i915_gem_object_flush_fence(obj, pipelined);
if (ret)
return ret;
if (reg->obj) {
struct drm_i915_gem_object *old = reg->obj;
drm_gem_object_reference(&old->base);
if (old->tiling_mode)
i915_gem_release_mmap(old);
ret = i915_gem_object_flush_fence(old, pipelined);
if (ret) {
drm_gem_object_unreference(&old->base);
return ret;
}
if (old->last_fenced_seqno == 0 && obj->last_fenced_seqno == 0)
pipelined = NULL;
old->fence_reg = I915_FENCE_REG_NONE;
old->last_fenced_ring = pipelined;
old->last_fenced_seqno =
pipelined ? i915_gem_next_request_seqno(pipelined) : 0;
drm_gem_object_unreference(&old->base);
} else if (obj->last_fenced_seqno == 0)
pipelined = NULL;
reg->obj = obj;
list_move_tail(&reg->lru_list, &dev_priv->mm.fence_list);
obj->fence_reg = reg - dev_priv->fence_regs;
obj->last_fenced_ring = pipelined;
reg->setup_seqno =
pipelined ? i915_gem_next_request_seqno(pipelined) : 0;
obj->last_fenced_seqno = reg->setup_seqno;
update:
obj->tiling_changed = false;
switch (INTEL_INFO(dev)->gen) {
case 7:
case 6:
ret = sandybridge_write_fence_reg(obj, pipelined);
break;
case 5:
case 4:
ret = i965_write_fence_reg(obj, pipelined);
break;
case 3:
ret = i915_write_fence_reg(obj, pipelined);
break;
case 2:
ret = i830_write_fence_reg(obj, pipelined);
break;
}
return ret;
}
static void
i915_gem_clear_fence_reg(struct drm_device *dev, struct drm_i915_fence_reg *reg)
{
drm_i915_private_t *dev_priv = dev->dev_private;
uint32_t fence_reg = reg - dev_priv->fence_regs;
switch (INTEL_INFO(dev)->gen) {
case 7:
case 6:
I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + fence_reg*8, 0);
break;
case 5:
case 4:
I915_WRITE64(FENCE_REG_965_0 + fence_reg*8, 0);
break;
case 3:
if (fence_reg >= 8)
fence_reg = FENCE_REG_945_8 + (fence_reg - 8) * 4;
else
case 2:
fence_reg = FENCE_REG_830_0 + fence_reg * 4;
I915_WRITE(fence_reg, 0);
break;
}
list_del_init(&reg->lru_list);
reg->obj = NULL;
reg->setup_seqno = 0;
reg->pin_count = 0;
}
int
i915_gem_init_object(struct drm_gem_object *obj)
{
printf("i915_gem_init_object called\n");
return (0);
}
static bool
i915_gem_object_is_inactive(struct drm_i915_gem_object *obj)
{
return (obj->gtt_space && !obj->active && obj->pin_count == 0);
}
static void
i915_gem_retire_task_handler(void *arg, int pending)
{
drm_i915_private_t *dev_priv;
struct drm_device *dev;
bool idle;
int i;
dev_priv = arg;
dev = dev_priv->dev;
/* Come back later if the device is busy... */
if (!sx_try_xlock(&dev->dev_struct_lock)) {
taskqueue_enqueue_timeout(dev_priv->tq,
&dev_priv->mm.retire_task, hz);
return;
}
CTR0(KTR_DRM, "retire_task");
i915_gem_retire_requests(dev);
/* Send a periodic flush down the ring so we don't hold onto GEM
* objects indefinitely.
*/
idle = true;
for (i = 0; i < I915_NUM_RINGS; i++) {
struct intel_ring_buffer *ring = &dev_priv->rings[i];
if (!list_empty(&ring->gpu_write_list)) {
struct drm_i915_gem_request *request;
int ret;
ret = i915_gem_flush_ring(ring,
0, I915_GEM_GPU_DOMAINS);
request = malloc(sizeof(*request), DRM_I915_GEM,
M_WAITOK | M_ZERO);
if (ret || request == NULL ||
i915_add_request(ring, NULL, request))
free(request, DRM_I915_GEM);
}
idle &= list_empty(&ring->request_list);
}
if (!dev_priv->mm.suspended && !idle)
taskqueue_enqueue_timeout(dev_priv->tq,
&dev_priv->mm.retire_task, hz);
DRM_UNLOCK(dev);
}
void
i915_gem_lastclose(struct drm_device *dev)
{
int ret;
if (drm_core_check_feature(dev, DRIVER_MODESET))
return;
ret = i915_gem_idle(dev);
if (ret != 0)
DRM_ERROR("failed to idle hardware: %d\n", ret);
}
static int
i915_gem_init_phys_object(struct drm_device *dev, int id, int size, int align)
{
drm_i915_private_t *dev_priv;
struct drm_i915_gem_phys_object *phys_obj;
int ret;
dev_priv = dev->dev_private;
if (dev_priv->mm.phys_objs[id - 1] != NULL || size == 0)
return (0);
phys_obj = malloc(sizeof(struct drm_i915_gem_phys_object), DRM_I915_GEM,
M_WAITOK | M_ZERO);
phys_obj->id = id;
phys_obj->handle = drm_pci_alloc(dev, size, align, ~0);
if (phys_obj->handle == NULL) {
ret = -ENOMEM;
goto free_obj;
}
pmap_change_attr((vm_offset_t)phys_obj->handle->vaddr,
size / PAGE_SIZE, PAT_WRITE_COMBINING);
dev_priv->mm.phys_objs[id - 1] = phys_obj;
return (0);
free_obj:
free(phys_obj, DRM_I915_GEM);
return (ret);
}
static void
i915_gem_free_phys_object(struct drm_device *dev, int id)
{
drm_i915_private_t *dev_priv;
struct drm_i915_gem_phys_object *phys_obj;
dev_priv = dev->dev_private;
if (dev_priv->mm.phys_objs[id - 1] == NULL)
return;
phys_obj = dev_priv->mm.phys_objs[id - 1];
if (phys_obj->cur_obj != NULL)
i915_gem_detach_phys_object(dev, phys_obj->cur_obj);
drm_pci_free(dev, phys_obj->handle);
free(phys_obj, DRM_I915_GEM);
dev_priv->mm.phys_objs[id - 1] = NULL;
}
void
i915_gem_free_all_phys_object(struct drm_device *dev)
{
int i;
for (i = I915_GEM_PHYS_CURSOR_0; i <= I915_MAX_PHYS_OBJECT; i++)
i915_gem_free_phys_object(dev, i);
}
void
i915_gem_detach_phys_object(struct drm_device *dev,
struct drm_i915_gem_object *obj)
{
vm_page_t m;
struct sf_buf *sf;
char *vaddr, *dst;
int i, page_count;
if (obj->phys_obj == NULL)
return;
vaddr = obj->phys_obj->handle->vaddr;
page_count = obj->base.size / PAGE_SIZE;
VM_OBJECT_WLOCK(obj->base.vm_obj);
for (i = 0; i < page_count; i++) {
m = i915_gem_wire_page(obj->base.vm_obj, i);
if (m == NULL)
continue; /* XXX */
VM_OBJECT_WUNLOCK(obj->base.vm_obj);
sf = sf_buf_alloc(m, 0);
if (sf != NULL) {
dst = (char *)sf_buf_kva(sf);
memcpy(dst, vaddr + IDX_TO_OFF(i), PAGE_SIZE);
sf_buf_free(sf);
}
drm_clflush_pages(&m, 1);
VM_OBJECT_WLOCK(obj->base.vm_obj);
vm_page_reference(m);
vm_page_lock(m);
vm_page_dirty(m);
vm_page_unwire(m, 0);
vm_page_unlock(m);
atomic_add_long(&i915_gem_wired_pages_cnt, -1);
}
VM_OBJECT_WUNLOCK(obj->base.vm_obj);
intel_gtt_chipset_flush();
obj->phys_obj->cur_obj = NULL;
obj->phys_obj = NULL;
}
int
i915_gem_attach_phys_object(struct drm_device *dev,
struct drm_i915_gem_object *obj, int id, int align)
{
drm_i915_private_t *dev_priv;
vm_page_t m;
struct sf_buf *sf;
char *dst, *src;
int i, page_count, ret;
if (id > I915_MAX_PHYS_OBJECT)
return (-EINVAL);
if (obj->phys_obj != NULL) {
if (obj->phys_obj->id == id)
return (0);
i915_gem_detach_phys_object(dev, obj);
}
dev_priv = dev->dev_private;
if (dev_priv->mm.phys_objs[id - 1] == NULL) {
ret = i915_gem_init_phys_object(dev, id, obj->base.size, align);
if (ret != 0) {
DRM_ERROR("failed to init phys object %d size: %zu\n",
id, obj->base.size);
return (ret);
}
}
/* bind to the object */
obj->phys_obj = dev_priv->mm.phys_objs[id - 1];
obj->phys_obj->cur_obj = obj;
page_count = obj->base.size / PAGE_SIZE;
VM_OBJECT_WLOCK(obj->base.vm_obj);
ret = 0;
for (i = 0; i < page_count; i++) {
m = i915_gem_wire_page(obj->base.vm_obj, i);
if (m == NULL) {
ret = -EIO;
break;
}
VM_OBJECT_WUNLOCK(obj->base.vm_obj);
sf = sf_buf_alloc(m, 0);
src = (char *)sf_buf_kva(sf);
dst = (char *)obj->phys_obj->handle->vaddr + IDX_TO_OFF(i);
memcpy(dst, src, PAGE_SIZE);
sf_buf_free(sf);
VM_OBJECT_WLOCK(obj->base.vm_obj);
vm_page_reference(m);
vm_page_lock(m);
vm_page_unwire(m, 0);
vm_page_unlock(m);
atomic_add_long(&i915_gem_wired_pages_cnt, -1);
}
VM_OBJECT_WUNLOCK(obj->base.vm_obj);
return (0);
}
static int
i915_gem_phys_pwrite(struct drm_device *dev, struct drm_i915_gem_object *obj,
uint64_t data_ptr, uint64_t offset, uint64_t size,
struct drm_file *file_priv)
{
char *user_data, *vaddr;
int ret;
vaddr = (char *)obj->phys_obj->handle->vaddr + offset;
user_data = (char *)(uintptr_t)data_ptr;
if (copyin_nofault(user_data, vaddr, size) != 0) {
/* The physical object once assigned is fixed for the lifetime
* of the obj, so we can safely drop the lock and continue
* to access vaddr.
*/
DRM_UNLOCK(dev);
ret = -copyin(user_data, vaddr, size);
DRM_LOCK(dev);
if (ret != 0)
return (ret);
}
intel_gtt_chipset_flush();
return (0);
}
static int
i915_gpu_is_active(struct drm_device *dev)
{
drm_i915_private_t *dev_priv;
dev_priv = dev->dev_private;
return (!list_empty(&dev_priv->mm.flushing_list) ||
!list_empty(&dev_priv->mm.active_list));
}
static void
i915_gem_lowmem(void *arg)
{
struct drm_device *dev;
struct drm_i915_private *dev_priv;
struct drm_i915_gem_object *obj, *next;
int cnt, cnt_fail, cnt_total;
dev = arg;
dev_priv = dev->dev_private;
if (!sx_try_xlock(&dev->dev_struct_lock))
return;
CTR0(KTR_DRM, "gem_lowmem");
rescan:
/* first scan for clean buffers */
i915_gem_retire_requests(dev);
cnt_total = cnt_fail = cnt = 0;
list_for_each_entry_safe(obj, next, &dev_priv->mm.inactive_list,
mm_list) {
if (i915_gem_object_is_purgeable(obj)) {
if (i915_gem_object_unbind(obj) != 0)
cnt_total++;
} else
cnt_total++;
}
/* second pass, evict/count anything still on the inactive list */
list_for_each_entry_safe(obj, next, &dev_priv->mm.inactive_list,
mm_list) {
if (i915_gem_object_unbind(obj) == 0)
cnt++;
else
cnt_fail++;
}
if (cnt_fail > cnt_total / 100 && i915_gpu_is_active(dev)) {
/*
* We are desperate for pages, so as a last resort, wait
* for the GPU to finish and discard whatever we can.
* This has a dramatic impact to reduce the number of
* OOM-killer events whilst running the GPU aggressively.
*/
if (i915_gpu_idle(dev, true) == 0)
goto rescan;
}
DRM_UNLOCK(dev);
}
void
i915_gem_unload(struct drm_device *dev)
{
struct drm_i915_private *dev_priv;
dev_priv = dev->dev_private;
EVENTHANDLER_DEREGISTER(vm_lowmem, dev_priv->mm.i915_lowmem);
}
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