/*
* Copyright 2008 Advanced Micro Devices , Inc .
* Copyright 2008 Red Hat Inc .
* Copyright 2009 Jerome Glisse .
*
* 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 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 COPYRIGHT HOLDER ( S ) OR AUTHOR ( S ) 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 : Dave Airlie
* Alex Deucher
* Jerome Glisse
* Christian K ö nig
*/
#include <linux/debugfs.h>
#include <drm/drm_file.h>
#include "radeon.h"
/*
* IB
* IBs ( Indirect Buffers ) and areas of GPU accessible memory where
* commands are stored . You can put a pointer to the IB in the
* command ring and the hw will fetch the commands from the IB
* and execute them . Generally userspace acceleration drivers
* produce command buffers which are send to the kernel and
* put in IBs for execution by the requested ring .
*/
static void radeon_debugfs_sa_init(struct radeon_device *rdev);
/**
* radeon_ib_get - request an IB ( Indirect Buffer )
*
* @ rdev : radeon_device pointer
* @ ring : ring index the IB is associated with
* @ vm : requested vm
* @ ib : IB object returned
* @ size : requested IB size
*
* Request an IB ( all asics ) . IBs are allocated using the
* suballocator .
* Returns 0 on success , error on failure .
*/
int radeon_ib_get(struct radeon_device *rdev, int ring,
struct radeon_ib *ib, struct radeon_vm *vm,
unsigned size)
{
int r;
r = radeon_sa_bo_new(&rdev->ring_tmp_bo, &ib->sa_bo, size, 256 );
if (r) {
dev_err(rdev->dev, "failed to get a new IB (%d)\n" , r);
return r;
}
radeon_sync_create(&ib->sync);
ib->ring = ring;
ib->fence = NULL;
ib->ptr = radeon_sa_bo_cpu_addr(ib->sa_bo);
ib->vm = vm;
if (vm) {
/* ib pool is bound at RADEON_VA_IB_OFFSET in virtual address
* space and soffset is the offset inside the pool bo
*/
ib->gpu_addr = drm_suballoc_soffset(ib->sa_bo) + RADEON_VA_IB_OFFSET;
} else {
ib->gpu_addr = radeon_sa_bo_gpu_addr(ib->sa_bo);
}
ib->is_const_ib = false ;
return 0 ;
}
/**
* radeon_ib_free - free an IB ( Indirect Buffer )
*
* @ rdev : radeon_device pointer
* @ ib : IB object to free
*
* Free an IB ( all asics ) .
*/
void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib *ib)
{
radeon_sync_free(rdev, &ib->sync, ib->fence);
radeon_sa_bo_free(&ib->sa_bo, ib->fence);
radeon_fence_unref(&ib->fence);
}
/**
* radeon_ib_schedule - schedule an IB ( Indirect Buffer ) on the ring
*
* @ rdev : radeon_device pointer
* @ ib : IB object to schedule
* @ const_ib : Const IB to schedule ( SI only )
* @ hdp_flush : Whether or not to perform an HDP cache flush
*
* Schedule an IB on the associated ring ( all asics ) .
* Returns 0 on success , error on failure .
*
* On SI , there are two parallel engines fed from the primary ring ,
* the CE ( Constant Engine ) and the DE ( Drawing Engine ) . Since
* resource descriptors have moved to memory , the CE allows you to
* prime the caches while the DE is updating register state so that
* the resource descriptors will be already in cache when the draw is
* processed . To accomplish this , the userspace driver submits two
* IBs , one for the CE and one for the DE . If there is a CE IB ( called
* a CONST_IB ) , it will be put on the ring prior to the DE IB . Prior
* to SI there was just a DE IB .
*/
int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib,
struct radeon_ib *const_ib, bool hdp_flush)
{
struct radeon_ring *ring = &rdev->ring[ib->ring];
int r = 0 ;
if (!ib->length_dw || !ring->ready) {
/* TODO: Nothings in the ib we should report. */
dev_err(rdev->dev, "couldn't schedule ib\n" );
return -EINVAL;
}
/* 64 dwords should be enough for fence too */
r = radeon_ring_lock(rdev, ring, 64 + RADEON_NUM_SYNCS * 8 );
if (r) {
dev_err(rdev->dev, "scheduling IB failed (%d).\n" , r);
return r;
}
/* grab a vm id if necessary */
if (ib->vm) {
struct radeon_fence *vm_id_fence;
vm_id_fence = radeon_vm_grab_id(rdev, ib->vm, ib->ring);
radeon_sync_fence(&ib->sync, vm_id_fence);
}
/* sync with other rings */
r = radeon_sync_rings(rdev, &ib->sync, ib->ring);
if (r) {
dev_err(rdev->dev, "failed to sync rings (%d)\n" , r);
radeon_ring_unlock_undo(rdev, ring);
return r;
}
if (ib->vm)
radeon_vm_flush(rdev, ib->vm, ib->ring,
ib->sync.last_vm_update);
if (const_ib) {
radeon_ring_ib_execute(rdev, const_ib->ring, const_ib);
radeon_sync_free(rdev, &const_ib->sync, NULL);
}
radeon_ring_ib_execute(rdev, ib->ring, ib);
r = radeon_fence_emit(rdev, &ib->fence, ib->ring);
if (r) {
dev_err(rdev->dev, "failed to emit fence for new IB (%d)\n" , r);
radeon_ring_unlock_undo(rdev, ring);
return r;
}
if (const_ib) {
const_ib->fence = radeon_fence_ref(ib->fence);
}
if (ib->vm)
radeon_vm_fence(rdev, ib->vm, ib->fence);
radeon_ring_unlock_commit(rdev, ring, hdp_flush);
return 0 ;
}
/**
* radeon_ib_pool_init - Init the IB ( Indirect Buffer ) pool
*
* @ rdev : radeon_device pointer
*
* Initialize the suballocator to manage a pool of memory
* for use as IBs ( all asics ) .
* Returns 0 on success , error on failure .
*/
int radeon_ib_pool_init(struct radeon_device *rdev)
{
int r;
if (rdev->ib_pool_ready) {
return 0 ;
}
if (rdev->family >= CHIP_BONAIRE) {
r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo,
RADEON_IB_POOL_SIZE*64 *1024 , 256 ,
RADEON_GEM_DOMAIN_GTT,
RADEON_GEM_GTT_WC);
} else {
/* Before CIK, it's better to stick to cacheable GTT due
* to the command stream checking
*/
r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo,
RADEON_IB_POOL_SIZE*64 *1024 , 256 ,
RADEON_GEM_DOMAIN_GTT, 0 );
}
if (r) {
return r;
}
r = radeon_sa_bo_manager_start(rdev, &rdev->ring_tmp_bo);
if (r) {
return r;
}
rdev->ib_pool_ready = true ;
radeon_debugfs_sa_init(rdev);
return 0 ;
}
/**
* radeon_ib_pool_fini - Free the IB ( Indirect Buffer ) pool
*
* @ rdev : radeon_device pointer
*
* Tear down the suballocator managing the pool of memory
* for use as IBs ( all asics ) .
*/
void radeon_ib_pool_fini(struct radeon_device *rdev)
{
if (rdev->ib_pool_ready) {
radeon_sa_bo_manager_suspend(rdev, &rdev->ring_tmp_bo);
radeon_sa_bo_manager_fini(rdev, &rdev->ring_tmp_bo);
rdev->ib_pool_ready = false ;
}
}
/**
* radeon_ib_ring_tests - test IBs on the rings
*
* @ rdev : radeon_device pointer
*
* Test an IB ( Indirect Buffer ) on each ring .
* If the test fails , disable the ring .
* Returns 0 on success , error if the primary GFX ring
* IB test fails .
*/
int radeon_ib_ring_tests(struct radeon_device *rdev)
{
unsigned i;
int r;
for (i = 0 ; i < RADEON_NUM_RINGS; ++i) {
struct radeon_ring *ring = &rdev->ring[i];
if (!ring->ready)
continue ;
r = radeon_ib_test(rdev, i, ring);
if (r) {
radeon_fence_driver_force_completion(rdev, i);
ring->ready = false ;
rdev->needs_reset = false ;
if (i == RADEON_RING_TYPE_GFX_INDEX) {
/* oh, oh, that's really bad */
DRM_ERROR("radeon: failed testing IB on GFX ring (%d).\n" , r);
rdev->accel_working = false ;
return r;
} else {
/* still not good, but we can live with it */
DRM_ERROR("radeon: failed testing IB on ring %d (%d).\n" , i, r);
}
}
}
return 0 ;
}
/*
* Debugfs info
*/
#if defined (CONFIG_DEBUG_FS)
static int radeon_debugfs_sa_info_show(struct seq_file *m, void *unused)
{
struct radeon_device *rdev = m->private ;
radeon_sa_bo_dump_debug_info(&rdev->ring_tmp_bo, m);
return 0 ;
}
DEFINE_SHOW_ATTRIBUTE(radeon_debugfs_sa_info);
#endif
static void radeon_debugfs_sa_init(struct radeon_device *rdev)
{
#if defined (CONFIG_DEBUG_FS)
struct dentry *root = rdev_to_drm(rdev)->primary->debugfs_root;
debugfs_create_file("radeon_sa_info" , 0444 , root, rdev,
&radeon_debugfs_sa_info_fops);
#endif
}
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