diff options
author | 2016-04-11 10:41:07 +0300 | |
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committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c')
-rw-r--r-- | kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 309 |
1 files changed, 309 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c new file mode 100644 index 000000000..fec65f01c --- /dev/null +++ b/kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c @@ -0,0 +1,309 @@ +/* + * Copyright 2015 Advanced Micro Devices, Inc. + * + * 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: monk liu <monk.liu@amd.com> + */ + +#include <drm/drmP.h> +#include "amdgpu.h" + +int amdgpu_ctx_init(struct amdgpu_device *adev, bool kernel, + struct amdgpu_ctx *ctx) +{ + unsigned i, j; + int r; + + memset(ctx, 0, sizeof(*ctx)); + ctx->adev = adev; + kref_init(&ctx->refcount); + spin_lock_init(&ctx->ring_lock); + for (i = 0; i < AMDGPU_MAX_RINGS; ++i) + ctx->rings[i].sequence = 1; + + if (amdgpu_enable_scheduler) { + /* create context entity for each ring */ + for (i = 0; i < adev->num_rings; i++) { + struct amd_sched_rq *rq; + if (kernel) + rq = &adev->rings[i]->sched.kernel_rq; + else + rq = &adev->rings[i]->sched.sched_rq; + r = amd_sched_entity_init(&adev->rings[i]->sched, + &ctx->rings[i].entity, + rq, amdgpu_sched_jobs); + if (r) + break; + } + + if (i < adev->num_rings) { + for (j = 0; j < i; j++) + amd_sched_entity_fini(&adev->rings[j]->sched, + &ctx->rings[j].entity); + kfree(ctx); + return r; + } + } + return 0; +} + +void amdgpu_ctx_fini(struct amdgpu_ctx *ctx) +{ + struct amdgpu_device *adev = ctx->adev; + unsigned i, j; + + if (!adev) + return; + + for (i = 0; i < AMDGPU_MAX_RINGS; ++i) + for (j = 0; j < AMDGPU_CTX_MAX_CS_PENDING; ++j) + fence_put(ctx->rings[i].fences[j]); + + if (amdgpu_enable_scheduler) { + for (i = 0; i < adev->num_rings; i++) + amd_sched_entity_fini(&adev->rings[i]->sched, + &ctx->rings[i].entity); + } +} + +static int amdgpu_ctx_alloc(struct amdgpu_device *adev, + struct amdgpu_fpriv *fpriv, + uint32_t *id) +{ + struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr; + struct amdgpu_ctx *ctx; + int r; + + ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + mutex_lock(&mgr->lock); + r = idr_alloc(&mgr->ctx_handles, ctx, 1, 0, GFP_KERNEL); + if (r < 0) { + mutex_unlock(&mgr->lock); + kfree(ctx); + return r; + } + *id = (uint32_t)r; + r = amdgpu_ctx_init(adev, false, ctx); + mutex_unlock(&mgr->lock); + + return r; +} + +static void amdgpu_ctx_do_release(struct kref *ref) +{ + struct amdgpu_ctx *ctx; + + ctx = container_of(ref, struct amdgpu_ctx, refcount); + + amdgpu_ctx_fini(ctx); + + kfree(ctx); +} + +static int amdgpu_ctx_free(struct amdgpu_fpriv *fpriv, uint32_t id) +{ + struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr; + struct amdgpu_ctx *ctx; + + mutex_lock(&mgr->lock); + ctx = idr_find(&mgr->ctx_handles, id); + if (ctx) { + idr_remove(&mgr->ctx_handles, id); + kref_put(&ctx->refcount, amdgpu_ctx_do_release); + mutex_unlock(&mgr->lock); + return 0; + } + mutex_unlock(&mgr->lock); + return -EINVAL; +} + +static int amdgpu_ctx_query(struct amdgpu_device *adev, + struct amdgpu_fpriv *fpriv, uint32_t id, + union drm_amdgpu_ctx_out *out) +{ + struct amdgpu_ctx *ctx; + struct amdgpu_ctx_mgr *mgr; + unsigned reset_counter; + + if (!fpriv) + return -EINVAL; + + mgr = &fpriv->ctx_mgr; + mutex_lock(&mgr->lock); + ctx = idr_find(&mgr->ctx_handles, id); + if (!ctx) { + mutex_unlock(&mgr->lock); + return -EINVAL; + } + + /* TODO: these two are always zero */ + out->state.flags = 0x0; + out->state.hangs = 0x0; + + /* determine if a GPU reset has occured since the last call */ + reset_counter = atomic_read(&adev->gpu_reset_counter); + /* TODO: this should ideally return NO, GUILTY, or INNOCENT. */ + if (ctx->reset_counter == reset_counter) + out->state.reset_status = AMDGPU_CTX_NO_RESET; + else + out->state.reset_status = AMDGPU_CTX_UNKNOWN_RESET; + ctx->reset_counter = reset_counter; + + mutex_unlock(&mgr->lock); + return 0; +} + +int amdgpu_ctx_ioctl(struct drm_device *dev, void *data, + struct drm_file *filp) +{ + int r; + uint32_t id; + + union drm_amdgpu_ctx *args = data; + struct amdgpu_device *adev = dev->dev_private; + struct amdgpu_fpriv *fpriv = filp->driver_priv; + + r = 0; + id = args->in.ctx_id; + + switch (args->in.op) { + case AMDGPU_CTX_OP_ALLOC_CTX: + r = amdgpu_ctx_alloc(adev, fpriv, &id); + args->out.alloc.ctx_id = id; + break; + case AMDGPU_CTX_OP_FREE_CTX: + r = amdgpu_ctx_free(fpriv, id); + break; + case AMDGPU_CTX_OP_QUERY_STATE: + r = amdgpu_ctx_query(adev, fpriv, id, &args->out); + break; + default: + return -EINVAL; + } + + return r; +} + +struct amdgpu_ctx *amdgpu_ctx_get(struct amdgpu_fpriv *fpriv, uint32_t id) +{ + struct amdgpu_ctx *ctx; + struct amdgpu_ctx_mgr *mgr; + + if (!fpriv) + return NULL; + + mgr = &fpriv->ctx_mgr; + + mutex_lock(&mgr->lock); + ctx = idr_find(&mgr->ctx_handles, id); + if (ctx) + kref_get(&ctx->refcount); + mutex_unlock(&mgr->lock); + return ctx; +} + +int amdgpu_ctx_put(struct amdgpu_ctx *ctx) +{ + if (ctx == NULL) + return -EINVAL; + + kref_put(&ctx->refcount, amdgpu_ctx_do_release); + return 0; +} + +uint64_t amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx, struct amdgpu_ring *ring, + struct fence *fence) +{ + struct amdgpu_ctx_ring *cring = & ctx->rings[ring->idx]; + uint64_t seq = cring->sequence; + unsigned idx = 0; + struct fence *other = NULL; + + idx = seq % AMDGPU_CTX_MAX_CS_PENDING; + other = cring->fences[idx]; + if (other) { + signed long r; + r = fence_wait_timeout(other, false, MAX_SCHEDULE_TIMEOUT); + if (r < 0) + DRM_ERROR("Error (%ld) waiting for fence!\n", r); + } + + fence_get(fence); + + spin_lock(&ctx->ring_lock); + cring->fences[idx] = fence; + cring->sequence++; + spin_unlock(&ctx->ring_lock); + + fence_put(other); + + return seq; +} + +struct fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx, + struct amdgpu_ring *ring, uint64_t seq) +{ + struct amdgpu_ctx_ring *cring = & ctx->rings[ring->idx]; + struct fence *fence; + + spin_lock(&ctx->ring_lock); + + if (seq >= cring->sequence) { + spin_unlock(&ctx->ring_lock); + return ERR_PTR(-EINVAL); + } + + + if (seq + AMDGPU_CTX_MAX_CS_PENDING < cring->sequence) { + spin_unlock(&ctx->ring_lock); + return NULL; + } + + fence = fence_get(cring->fences[seq % AMDGPU_CTX_MAX_CS_PENDING]); + spin_unlock(&ctx->ring_lock); + + return fence; +} + +void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr) +{ + mutex_init(&mgr->lock); + idr_init(&mgr->ctx_handles); +} + +void amdgpu_ctx_mgr_fini(struct amdgpu_ctx_mgr *mgr) +{ + struct amdgpu_ctx *ctx; + struct idr *idp; + uint32_t id; + + idp = &mgr->ctx_handles; + + idr_for_each_entry(idp, ctx, id) { + if (kref_put(&ctx->refcount, amdgpu_ctx_do_release) != 1) + DRM_ERROR("ctx %p is still alive\n", ctx); + } + + idr_destroy(&mgr->ctx_handles); + mutex_destroy(&mgr->lock); +} |