From: Rob Clark <robdcl...@chromium.org>
This submitqueue type isn't tied to a hw ringbuffer, but instead
executes on the CPU for performing async VM_BIND ops.
Signed-off-by: Rob Clark <robdcl...@chromium.org>
---
drivers/gpu/drm/msm/msm_gem.c | 3 +-
drivers/gpu/drm/msm/msm_gem.h | 10 ++
drivers/gpu/drm/msm/msm_gem_submit.c | 128 +++++++++++++++++++++++---
drivers/gpu/drm/msm/msm_gem_vma.c | 107 +++++++++++++++++++++
drivers/gpu/drm/msm/msm_gpu.h | 3 +
drivers/gpu/drm/msm/msm_submitqueue.c | 57 +++++++++---
include/uapi/drm/msm_drm.h | 9 +-
7 files changed, 287 insertions(+), 30 deletions(-)
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 5a5220b6f21d..4c68a3dd3fed 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -232,8 +232,7 @@ static void put_pages(struct drm_gem_object *obj)
}
}
-static struct page **msm_gem_get_pages_locked(struct drm_gem_object *obj,
- unsigned madv)
+struct page **msm_gem_get_pages_locked(struct drm_gem_object *obj, unsigned
madv)
{
struct msm_gem_object *msm_obj = to_msm_bo(obj);
diff --git a/drivers/gpu/drm/msm/msm_gem.h b/drivers/gpu/drm/msm/msm_gem.h
index 8e29e36ca9c5..d427ead2dce0 100644
--- a/drivers/gpu/drm/msm/msm_gem.h
+++ b/drivers/gpu/drm/msm/msm_gem.h
@@ -53,6 +53,13 @@ struct msm_gem_vm {
/** @base: Inherit from drm_gpuvm. */
struct drm_gpuvm base;
+ /**
+ * @sched: Scheduler used for asynchronous VM_BIND request.
+ *
+ * Unused for kernel managed VMs (where all operations are synchronous).
+ */
+ struct drm_gpu_scheduler sched;
+
/**
* @mm: Memory management for kernel managed VA allocations
*
@@ -106,6 +113,8 @@ struct drm_gpuvm *
msm_gem_vm_create(struct drm_device *drm, struct msm_mmu *mmu, const char
*name,
u64 va_start, u64 va_size, bool managed);
+void msm_gem_vm_close(struct drm_gpuvm *gpuvm);
+
struct msm_fence_context;
/**
@@ -195,6 +204,7 @@ int msm_gem_get_and_pin_iova(struct drm_gem_object *obj,
struct drm_gpuvm *vm,
uint64_t *iova);
void msm_gem_unpin_iova(struct drm_gem_object *obj, struct drm_gpuvm *vm);
void msm_gem_pin_obj_locked(struct drm_gem_object *obj);
+struct page **msm_gem_get_pages_locked(struct drm_gem_object *obj, unsigned
madv);
struct page **msm_gem_pin_pages_locked(struct drm_gem_object *obj);
void msm_gem_unpin_pages_locked(struct drm_gem_object *obj);
int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c
b/drivers/gpu/drm/msm/msm_gem_submit.c
index bb61231ab8ba..39a6e0418bdf 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -23,6 +23,11 @@
#define SUBMIT_ERROR(err, submit, fmt, ...) \
UERR(err, (submit)->dev, fmt, ##__VA_ARGS__)
+static bool submit_is_vmbind(struct msm_gem_submit *submit)
+{
+ return !!(submit->queue->flags & MSM_SUBMITQUEUE_VM_BIND);
+}
+
/*
* Cmdstream submission:
*/
@@ -115,6 +120,17 @@ void __msm_gem_submit_destroy(struct kref *kref)
kfree(submit);
}
+static bool invalid_bo_flags(bool vm_bind, uint32_t flags)
+{
+ if (vm_bind) {
+ return flags & ~(MSM_SUBMIT_BO_DUMP | MSM_SUBMIT_BO_OP_MASK);
+ } else {
+ /* at least one of READ and/or WRITE flags should be set: */
+ return (flags & ~MSM_SUBMIT_BO_FLAGS) ||
+ !(flags & (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE));
+ }
+}
+
static bool invalid_alignment(uint64_t addr)
{
/*
@@ -129,9 +145,10 @@ static int submit_lookup_objects(struct msm_gem_submit
*submit,
struct drm_msm_gem_submit *args, struct drm_file *file)
{
unsigned i, bo_stride = args->bos_stride;
+ bool vm_bind = submit_is_vmbind(submit);
int ret = 0;
- if (!bo_stride)
+ if (!bo_stride || !vm_bind)
bo_stride = sizeof(struct drm_msm_gem_submit_bo);
for (i = 0; i < args->nr_bos; i++) {
@@ -151,11 +168,7 @@ static int submit_lookup_objects(struct msm_gem_submit
*submit,
goto out;
}
-/* at least one of READ and/or WRITE flags should be set: */
-#define MANDATORY_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
-
- if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
- !(submit_bo.flags & MANDATORY_FLAGS))
+ if (invalid_bo_flags(vm_bind, submit_bo.flags))
ret = SUBMIT_ERROR(EINVAL, submit, "invalid flags:
%x\n", submit_bo.flags);
if (invalid_alignment(submit_bo.address))
@@ -174,6 +187,7 @@ static int submit_lookup_objects(struct msm_gem_submit
*submit,
submit->bos[i].handle = submit_bo.handle;
submit->bos[i].flags = submit_bo.flags;
+ submit->bos[i].iova = submit_bo.address;
submit->bos[i].bo_offset = submit_bo.bo_offset;
submit->bos[i].range = submit_bo.range;
}
@@ -183,6 +197,12 @@ static int submit_lookup_objects(struct msm_gem_submit
*submit,
for (i = 0; i < args->nr_bos; i++) {
struct drm_gem_object *obj;
+ if (vm_bind) {
+ unsigned op = submit->bos[i].flags &
MSM_SUBMIT_BO_OP_MASK;
+ if (op != MSM_SUBMIT_BO_OP_MAP)
+ continue;
+ }
+
/* normally use drm_gem_object_lookup(), but for bulk lookup
* all under single table_lock just hit object_idr directly:
*/
@@ -297,13 +317,22 @@ static int submit_lookup_cmds(struct msm_gem_submit
*submit,
/* This is where we make sure all the bo's are reserved and pin'd: */
static int submit_lock_objects(struct msm_gem_submit *submit)
{
+ bool vm_bind = submit_is_vmbind(submit);
+ unsigned flags = DRM_EXEC_INTERRUPTIBLE_WAIT;
int ret;
- drm_exec_init(&submit->exec, DRM_EXEC_INTERRUPTIBLE_WAIT,
submit->nr_bos);
+ if (vm_bind)
+ flags |= DRM_EXEC_IGNORE_DUPLICATES;
+
+ drm_exec_init(&submit->exec, flags, submit->nr_bos);
drm_exec_until_all_locked (&submit->exec) {
for (unsigned i = 0; i < submit->nr_bos; i++) {
struct drm_gem_object *obj = submit->bos[i].obj;
+
+ if (!obj)
+ continue;
+
ret = drm_exec_prepare_obj(&submit->exec, obj, 1);
drm_exec_retry_on_contention(&submit->exec);
if (ret)
@@ -372,6 +401,28 @@ static int submit_pin_vmas(struct msm_gem_submit *submit)
return ret;
}
+static int submit_get_pages(struct msm_gem_submit *submit)
+{
+ /*
+ * First loop, before holding the LRU lock, avoids holding the
+ * LRU lock while calling msm_gem_pin_vma_locked (which could
+ * trigger get_pages())
+ */
+ for (int i = 0; i < submit->nr_bos; i++) {
+ struct drm_gem_object *obj = submit->bos[i].obj;
+ struct page **pages;
+
+ if (!obj)
+ continue;
+
+ pages = msm_gem_get_pages_locked(obj, MSM_MADV_WILLNEED);
+ if (IS_ERR(pages))
+ return PTR_ERR(pages);
+ }
+
+ return 0;
+}
+
static void submit_pin_objects(struct msm_gem_submit *submit)
{
struct msm_drm_private *priv = submit->dev->dev_private;
@@ -385,7 +436,12 @@ static void submit_pin_objects(struct msm_gem_submit
*submit)
*/
mutex_lock(&priv->lru.lock);
for (int i = 0; i < submit->nr_bos; i++) {
- msm_gem_pin_obj_locked(submit->bos[i].obj);
+ struct drm_gem_object *obj = submit->bos[i].obj;
+
+ if (!obj)
+ continue;
+
+ msm_gem_pin_obj_locked(obj);
}
mutex_unlock(&priv->lru.lock);
@@ -400,6 +456,9 @@ static void submit_unpin_objects(struct msm_gem_submit
*submit)
for (int i = 0; i < submit->nr_bos; i++) {
struct drm_gem_object *obj = submit->bos[i].obj;
+ if (!obj)
+ continue;
+
msm_gem_unpin_locked(obj);
}
@@ -413,6 +472,9 @@ static void submit_attach_object_fences(struct
msm_gem_submit *submit)
for (i = 0; i < submit->nr_bos; i++) {
struct drm_gem_object *obj = submit->bos[i].obj;
+ if (!obj)
+ continue;
+
if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
dma_resv_add_fence(obj->resv, submit->user_fence,
DMA_RESV_USAGE_WRITE);
@@ -708,6 +770,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
struct msm_ringbuffer *ring;
struct msm_submit_post_dep *post_deps = NULL;
struct drm_syncobj **syncobjs_to_reset = NULL;
+ unsigned cmds_to_parse;
int out_fence_fd = -1;
unsigned i;
int ret;
@@ -724,9 +787,6 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
return UERR(EINVAL, dev, "invalid pipe");
- if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_EXEC_FLAGS)
- return UERR(EINVAL, dev, "invalid flags");
-
if (args->flags & MSM_SUBMIT_SUDO) {
if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) ||
!capable(CAP_SYS_RAWIO))
@@ -737,6 +797,26 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void
*data,
if (!queue)
return -ENOENT;
+ if (queue->flags & MSM_SUBMITQUEUE_VM_BIND) {
+ if (args->nr_cmds || args->cmds) {
+ ret = UERR(EINVAL, dev, "nr_cmds should be zero for
VM_BIND queue");
+ goto out_post_unlock;
+ }
+ if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_VM_BIND_FLAGS) {
+ ret = UERR(EINVAL, dev, "invalid flags");
+ goto out_post_unlock;
+ }
+ } else {
+ if (msm_context_is_vmbind(ctx) && (args->nr_bos || args->bos)) {
+ ret = UERR(EINVAL, dev, "nr_bos should be zero for
VM_BIND contexts");
+ goto out_post_unlock;
+ }
+ if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_EXEC_FLAGS) {
+ ret = UERR(EINVAL, dev, "invalid flags");
+ goto out_post_unlock;
+ }
+ }
+
ring = gpu->rb[queue->ring_nr];
if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
@@ -813,19 +893,37 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void
*data,
if (ret)
goto out;
- if (!(args->flags & MSM_SUBMIT_NO_IMPLICIT)) {
+ if (msm_context_is_vmbind(ctx) && !submit_is_vmbind(submit)) {
+ /*
+ * If we are not using VM_BIND, submit_pin_vmas() will validate
+ * just the BOs attached to the submit. In that case we don't
+ * need to validate the _entire_ vm, because userspace tracked
+ * what BOs are associated with the submit.
+ */
+ ret = drm_gpuvm_validate(submit->vm, &submit->exec);
+ if (ret)
+ goto out;
+ }
+
+ if (!(args->flags & MSM_SUBMIT_NO_IMPLICIT) &&
!submit_is_vmbind(submit)) {
ret = submit_fence_sync(submit);
if (ret)
goto out;
}
- ret = submit_pin_vmas(submit);
+ if (submit_is_vmbind(submit)) {
+ ret = submit_get_pages(submit);
+ } else {
+ ret = submit_pin_vmas(submit);
+ }
if (ret)
goto out;
submit_pin_objects(submit);
- for (i = 0; i < args->nr_cmds; i++) {
+ cmds_to_parse = msm_context_is_vmbind(ctx) ? 0 : args->nr_cmds;
+
+ for (i = 0; i < cmds_to_parse; i++) {
struct drm_gem_object *obj;
uint64_t iova;
@@ -856,7 +954,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
goto out;
}
- submit->nr_cmds = i;
+ submit->nr_cmds = args->nr_cmds;
idr_preload(GFP_KERNEL);
diff --git a/drivers/gpu/drm/msm/msm_gem_vma.c
b/drivers/gpu/drm/msm/msm_gem_vma.c
index 0bc22618e9f0..8c780dd6a936 100644
--- a/drivers/gpu/drm/msm/msm_gem_vma.c
+++ b/drivers/gpu/drm/msm/msm_gem_vma.c
@@ -162,6 +162,70 @@ static const struct drm_gpuvm_ops msm_gpuvm_ops = {
.vm_free = msm_gem_vm_free,
};
+static int
+run_bo_op(struct msm_gem_submit *submit, const struct msm_gem_submit_bo *bo)
+{
+ unsigned op = bo->flags & MSM_SUBMIT_BO_OP_MASK;
+
+ switch (op) {
+ case MSM_SUBMIT_BO_OP_MAP:
+ case MSM_SUBMIT_BO_OP_MAP_NULL:
+ return drm_gpuvm_sm_map(submit->vm, submit->vm, bo->iova,
+ bo->range, bo->obj, bo->bo_offset);
+ break;
+ case MSM_SUBMIT_BO_OP_UNMAP:
+ return drm_gpuvm_sm_unmap(submit->vm, submit->vm, bo->iova,
+ bo->bo_offset);
+ }
+
+ return -EINVAL;
+}
+
+static struct dma_fence *
+msm_vma_job_run(struct drm_sched_job *job)
+{
+ struct msm_gem_submit *submit = to_msm_submit(job);
+
+ for (unsigned i = 0; i < submit->nr_bos; i++) {
+ int ret = run_bo_op(submit, &submit->bos[i]);
+ if (ret) {
+ to_msm_vm(submit->vm)->unusable = true;
+ return ERR_PTR(ret);
+ }
+ }
+
+ /* VM_BIND ops run on CPU, so we are done now: */
+ msm_submit_retire(submit);
+
+ for (int i = 0; i < submit->nr_bos; i++) {
+ struct drm_gem_object *obj = submit->bos[i].obj;
+
+ if (!obj)
+ continue;
+
+ msm_gem_lock(obj);
+ msm_gem_unpin_locked(obj);
+ msm_gem_unlock(obj);
+ }
+
+ /* VM_BIND ops are synchronous, so no fence to wait on: */
+ return NULL;
+}
+
+static void
+msm_vma_job_free(struct drm_sched_job *job)
+{
+ struct msm_gem_submit *submit = to_msm_submit(job);
+
+ drm_sched_job_cleanup(job);
+ msm_gem_submit_put(submit);
+}
+
+static const struct drm_sched_backend_ops msm_vm_bind_ops = {
+ .run_job = msm_vma_job_run,
+ .free_job = msm_vma_job_free
+};
+
/**
* msm_gem_vm_create() - Create and initialize a &msm_gem_vm
* @drm: the drm device
@@ -198,6 +262,21 @@ msm_gem_vm_create(struct drm_device *drm, struct msm_mmu
*mmu, const char *name,
goto err_free_vm;
}
+ if (!managed) {
+ struct drm_sched_init_args args = {
+ .ops = &msm_vm_bind_ops,
+ .num_rqs = 1,
+ .credit_limit = 1,
+ .timeout = MAX_SCHEDULE_TIMEOUT,
+ .name = "msm-vm-bind",
+ .dev = drm->dev,
+ };
+
+ ret = drm_sched_init(&vm->sched, &args);
+ if (ret)
+ goto err_free_dummy;
+ }
+
drm_gpuvm_init(&vm->base, name, flags, drm, dummy_gem,
va_start, va_size, 0, 0, &msm_gpuvm_ops);
drm_gem_object_put(dummy_gem);
@@ -212,8 +291,36 @@ msm_gem_vm_create(struct drm_device *drm, struct msm_mmu
*mmu, const char *name,
return &vm->base;
+err_free_dummy:
+ drm_gem_object_put(dummy_gem);
+
err_free_vm:
kfree(vm);
return ERR_PTR(ret);
}
+
+/**
+ * msm_gem_vm_close() - Close a VM
+ * @gpuvm: The VM to close
+ *
+ * Called when the drm device file is closed, to tear down VM related resources
+ * (which will drop refcounts to GEM objects that were still mapped into the
+ * VM at the time).
+ */
+void
+msm_gem_vm_close(struct drm_gpuvm *gpuvm)
+{
+ struct msm_gem_vm *vm = to_msm_vm(gpuvm);
+
+ /*
+ * For kernel managed VMs, the VMAs are torn down when the handle is
+ * closed, so nothing more to do.
+ */
+ if (vm->managed)
+ return;
+
+ /* Kill the scheduler now, so we aren't racing with it for cleanup: */
+ drm_sched_stop(&vm->sched, NULL);
+ drm_sched_fini(&vm->sched);
+}
diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h
index 20f52d9636b0..49c8862ada13 100644
--- a/drivers/gpu/drm/msm/msm_gpu.h
+++ b/drivers/gpu/drm/msm/msm_gpu.h
@@ -562,6 +562,9 @@ struct msm_gpu_submitqueue {
struct mutex lock;
struct kref ref;
struct drm_sched_entity *entity;
+
+ /** @_vm_bind_entity: used for @entity pointer for VM_BIND queues */
+ struct drm_sched_entity _vm_bind_entity[0];
};
struct msm_gpu_state_bo {
diff --git a/drivers/gpu/drm/msm/msm_submitqueue.c
b/drivers/gpu/drm/msm/msm_submitqueue.c
index 8ced49c7557b..99ab780d5d7b 100644
--- a/drivers/gpu/drm/msm/msm_submitqueue.c
+++ b/drivers/gpu/drm/msm/msm_submitqueue.c
@@ -72,6 +72,9 @@ void msm_submitqueue_destroy(struct kref *kref)
idr_destroy(&queue->fence_idr);
+ if (queue->entity == &queue->_vm_bind_entity[0])
+ drm_sched_entity_destroy(queue->entity);
+
msm_context_put(queue->ctx);
kfree(queue);
@@ -115,6 +118,11 @@ void msm_submitqueue_close(struct msm_context *ctx)
list_del(&entry->node);
msm_submitqueue_put(entry);
}
+
+ if (!ctx->vm)
+ return;
+
+ msm_gem_vm_close(ctx->vm);
}
static struct drm_sched_entity *
@@ -160,8 +168,6 @@ int msm_submitqueue_create(struct drm_device *drm, struct
msm_context *ctx,
struct msm_drm_private *priv = drm->dev_private;
struct msm_gpu_submitqueue *queue;
enum drm_sched_priority sched_prio;
- extern int enable_preemption;
- bool preemption_supported;
unsigned ring_nr;
int ret;
@@ -171,26 +177,53 @@ int msm_submitqueue_create(struct drm_device *drm, struct
msm_context *ctx,
if (!priv->gpu)
return -ENODEV;
- preemption_supported = priv->gpu->nr_rings == 1 && enable_preemption !=
0;
+ if (flags & MSM_SUBMITQUEUE_VM_BIND) {
+ unsigned sz;
- if (flags & MSM_SUBMITQUEUE_ALLOW_PREEMPT && preemption_supported)
- return -EINVAL;
+ /* Not allowed for kernel managed VMs (ie. kernel allocs VA) */
+ if (!msm_context_is_vmbind(ctx))
+ return -EINVAL;
- ret = msm_gpu_convert_priority(priv->gpu, prio, &ring_nr, &sched_prio);
- if (ret)
- return ret;
+ if (prio)
+ return -EINVAL;
+
+ sz = struct_size(queue, _vm_bind_entity, 1);
+ queue = kzalloc(sz, GFP_KERNEL);
+ } else {
+ extern int enable_preemption;
+ bool preemption_supported =
+ priv->gpu->nr_rings == 1 && enable_preemption != 0;
+
+ if (flags & MSM_SUBMITQUEUE_ALLOW_PREEMPT &&
preemption_supported)
+ return -EINVAL;
- queue = kzalloc(sizeof(*queue), GFP_KERNEL);
+ ret = msm_gpu_convert_priority(priv->gpu, prio, &ring_nr,
&sched_prio);
+ if (ret)
+ return ret;
+
+ queue = kzalloc(sizeof(*queue), GFP_KERNEL);
+ }
if (!queue)
return -ENOMEM;
kref_init(&queue->ref);
queue->flags = flags;
- queue->ring_nr = ring_nr;
- queue->entity = get_sched_entity(ctx, priv->gpu->rb[ring_nr],
- ring_nr, sched_prio);
+ if (flags & MSM_SUBMITQUEUE_VM_BIND) {
+ struct drm_gpu_scheduler *sched =
&to_msm_vm(msm_context_vm(drm, ctx))->sched;
+
+ queue->entity = &queue->_vm_bind_entity[0];
+
+ drm_sched_entity_init(queue->entity, DRM_SCHED_PRIORITY_KERNEL,
+ &sched, 1, NULL);
+ } else {
+ queue->ring_nr = ring_nr;
+
+ queue->entity = get_sched_entity(ctx, priv->gpu->rb[ring_nr],
+ ring_nr, sched_prio);
+ }
+
if (IS_ERR(queue->entity)) {
ret = PTR_ERR(queue->entity);
kfree(queue);
diff --git a/include/uapi/drm/msm_drm.h b/include/uapi/drm/msm_drm.h
index 1a948d49c610..39b55c8d7413 100644
--- a/include/uapi/drm/msm_drm.h
+++ b/include/uapi/drm/msm_drm.h
@@ -404,12 +404,19 @@ struct drm_msm_gem_madvise {
/*
* Draw queues allow the user to set specific submission parameter. Command
* submissions specify a specific submitqueue to use. ID 0 is reserved for
- * backwards compatibility as a "default" submitqueue
+ * backwards compatibility as a "default" submitqueue.
+ *
+ * Because VM_BIND async updates happen on the CPU, they must run on a
+ * virtual queue created with the flag MSM_SUBMITQUEUE_VM_BIND. If we had
+ * a way to do pgtable updates on the GPU, we could drop this restriction.
*/
#define MSM_SUBMITQUEUE_ALLOW_PREEMPT 0x00000001
+#define MSM_SUBMITQUEUE_VM_BIND 0x00000002 /* virtual queue for
VM_BIND ops */
+
#define MSM_SUBMITQUEUE_FLAGS ( \
MSM_SUBMITQUEUE_ALLOW_PREEMPT | \
+ MSM_SUBMITQUEUE_VM_BIND | \
0)
/*
--
2.48.1
