/* * 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" static int amdgpu_ctx_init(struct amdgpu_device *adev, 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);	ctx->fences = kcalloc(amdgpu_sched_jobs * AMDGPU_MAX_RINGS,			      sizeof(struct dma_fence*), GFP_KERNEL);	if (!ctx->fences)		return -ENOMEM; 	for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {		ctx->rings[i].sequence = 1;		ctx->rings[i].fences = &ctx->fences[amdgpu_sched_jobs * i];	} 	ctx->reset_counter = atomic_read(&adev->gpu_reset_counter); 	/* create context entity for each ring */	for (i = 0; i < adev->num_rings; i++) {		struct amdgpu_ring *ring = adev->rings[i];		struct amd_sched_rq *rq; 		rq = &ring->sched.sched_rq[AMD_SCHED_PRIORITY_NORMAL]; 		if (ring == &adev->gfx.kiq.ring)			continue; 		r = amd_sched_entity_init(&ring->sched, &ctx->rings[i].entity,					  rq, amdgpu_sched_jobs);		if (r)			goto failed;	} 	r = amdgpu_queue_mgr_init(adev, &ctx->queue_mgr);	if (r)		goto failed; 	return 0; failed:	for (j = 0; j < i; j++)		amd_sched_entity_fini(&adev->rings[j]->sched,				      &ctx->rings[j].entity);	kfree(ctx->fences);	ctx->fences = NULL;	return r;} static 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_sched_jobs; ++j)			dma_fence_put(ctx->rings[i].fences[j]);	kfree(ctx->fences);	ctx->fences = NULL; 	for (i = 0; i < adev->num_rings; i++)		amd_sched_entity_fini(&adev->rings[i]->sched,				      &ctx->rings[i].entity); 	amdgpu_queue_mgr_fini(adev, &ctx->queue_mgr);} 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, ctx);	if (r) {		idr_remove(&mgr->ctx_handles, *id);		*id = 0;		kfree(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_remove(&mgr->ctx_handles, id);	if (ctx)		kref_put(&ctx->refcount, amdgpu_ctx_do_release);	mutex_unlock(&mgr->lock);	return ctx ? 0 : -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 dma_fence *fence){	struct amdgpu_ctx_ring *cring = & ctx->rings[ring->idx];	uint64_t seq = cring->sequence;	unsigned idx = 0;	struct dma_fence *other = NULL; 	idx = seq & (amdgpu_sched_jobs - 1);	other = cring->fences[idx];	if (other) {		signed long r;		r = dma_fence_wait_timeout(other, false, MAX_SCHEDULE_TIMEOUT);		if (r < 0)			DRM_ERROR("Error (%ld) waiting for fence!\n", r);	} 	dma_fence_get(fence); 	spin_lock(&ctx->ring_lock);	cring->fences[idx] = fence;	cring->sequence++;	spin_unlock(&ctx->ring_lock); 	dma_fence_put(other); 	return seq;} struct dma_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 dma_fence *fence; 	spin_lock(&ctx->ring_lock); 	if (seq == ~0ull)		seq = ctx->rings[ring->idx].sequence - 1; 	if (seq >= cring->sequence) {		spin_unlock(&ctx->ring_lock);		return ERR_PTR(-EINVAL);	}  	if (seq + amdgpu_sched_jobs < cring->sequence) {		spin_unlock(&ctx->ring_lock);		return NULL;	} 	fence = dma_fence_get(cring->fences[seq & (amdgpu_sched_jobs - 1)]);	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);}