From 03dd4cb26d967f9588437b0fc9cc0e8353322bb7 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Fri, 25 Mar 2016 03:53:42 -0300 Subject: Linux-libre 4.5-gnu --- drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c | 443 +++++++++++++++++++++++++++ 1 file changed, 443 insertions(+) create mode 100644 drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c (limited to 'drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c') diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c new file mode 100644 index 000000000..1aba01a99 --- /dev/null +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c @@ -0,0 +1,443 @@ +/* + * Copyright (C) 2015 Etnaviv Project + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see . + */ + +#include +#include "etnaviv_drv.h" +#include "etnaviv_gpu.h" +#include "etnaviv_gem.h" + +/* + * Cmdstream submission: + */ + +#define BO_INVALID_FLAGS ~(ETNA_SUBMIT_BO_READ | ETNA_SUBMIT_BO_WRITE) +/* make sure these don't conflict w/ ETNAVIV_SUBMIT_BO_x */ +#define BO_LOCKED 0x4000 +#define BO_PINNED 0x2000 + +static inline void __user *to_user_ptr(u64 address) +{ + return (void __user *)(uintptr_t)address; +} + +static struct etnaviv_gem_submit *submit_create(struct drm_device *dev, + struct etnaviv_gpu *gpu, size_t nr) +{ + struct etnaviv_gem_submit *submit; + size_t sz = size_vstruct(nr, sizeof(submit->bos[0]), sizeof(*submit)); + + submit = kmalloc(sz, GFP_TEMPORARY | __GFP_NOWARN | __GFP_NORETRY); + if (submit) { + submit->dev = dev; + submit->gpu = gpu; + + /* initially, until copy_from_user() and bo lookup succeeds: */ + submit->nr_bos = 0; + + ww_acquire_init(&submit->ticket, &reservation_ww_class); + } + + return submit; +} + +static int submit_lookup_objects(struct etnaviv_gem_submit *submit, + struct drm_file *file, struct drm_etnaviv_gem_submit_bo *submit_bos, + unsigned nr_bos) +{ + struct drm_etnaviv_gem_submit_bo *bo; + unsigned i; + int ret = 0; + + spin_lock(&file->table_lock); + + for (i = 0, bo = submit_bos; i < nr_bos; i++, bo++) { + struct drm_gem_object *obj; + + if (bo->flags & BO_INVALID_FLAGS) { + DRM_ERROR("invalid flags: %x\n", bo->flags); + ret = -EINVAL; + goto out_unlock; + } + + submit->bos[i].flags = bo->flags; + + /* normally use drm_gem_object_lookup(), but for bulk lookup + * all under single table_lock just hit object_idr directly: + */ + obj = idr_find(&file->object_idr, bo->handle); + if (!obj) { + DRM_ERROR("invalid handle %u at index %u\n", + bo->handle, i); + ret = -EINVAL; + goto out_unlock; + } + + /* + * Take a refcount on the object. The file table lock + * prevents the object_idr's refcount on this being dropped. + */ + drm_gem_object_reference(obj); + + submit->bos[i].obj = to_etnaviv_bo(obj); + } + +out_unlock: + submit->nr_bos = i; + spin_unlock(&file->table_lock); + + return ret; +} + +static void submit_unlock_object(struct etnaviv_gem_submit *submit, int i) +{ + if (submit->bos[i].flags & BO_LOCKED) { + struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj; + + ww_mutex_unlock(&etnaviv_obj->resv->lock); + submit->bos[i].flags &= ~BO_LOCKED; + } +} + +static int submit_lock_objects(struct etnaviv_gem_submit *submit) +{ + int contended, slow_locked = -1, i, ret = 0; + +retry: + for (i = 0; i < submit->nr_bos; i++) { + struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj; + + if (slow_locked == i) + slow_locked = -1; + + contended = i; + + if (!(submit->bos[i].flags & BO_LOCKED)) { + ret = ww_mutex_lock_interruptible(&etnaviv_obj->resv->lock, + &submit->ticket); + if (ret == -EALREADY) + DRM_ERROR("BO at index %u already on submit list\n", + i); + if (ret) + goto fail; + submit->bos[i].flags |= BO_LOCKED; + } + } + + ww_acquire_done(&submit->ticket); + + return 0; + +fail: + for (; i >= 0; i--) + submit_unlock_object(submit, i); + + if (slow_locked > 0) + submit_unlock_object(submit, slow_locked); + + if (ret == -EDEADLK) { + struct etnaviv_gem_object *etnaviv_obj; + + etnaviv_obj = submit->bos[contended].obj; + + /* we lost out in a seqno race, lock and retry.. */ + ret = ww_mutex_lock_slow_interruptible(&etnaviv_obj->resv->lock, + &submit->ticket); + if (!ret) { + submit->bos[contended].flags |= BO_LOCKED; + slow_locked = contended; + goto retry; + } + } + + return ret; +} + +static int submit_fence_sync(const struct etnaviv_gem_submit *submit) +{ + unsigned int context = submit->gpu->fence_context; + int i, ret = 0; + + for (i = 0; i < submit->nr_bos; i++) { + struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj; + bool write = submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE; + + ret = etnaviv_gpu_fence_sync_obj(etnaviv_obj, context, write); + if (ret) + break; + } + + return ret; +} + +static void submit_unpin_objects(struct etnaviv_gem_submit *submit) +{ + int i; + + for (i = 0; i < submit->nr_bos; i++) { + struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj; + + if (submit->bos[i].flags & BO_PINNED) + etnaviv_gem_put_iova(submit->gpu, &etnaviv_obj->base); + + submit->bos[i].iova = 0; + submit->bos[i].flags &= ~BO_PINNED; + } +} + +static int submit_pin_objects(struct etnaviv_gem_submit *submit) +{ + int i, ret = 0; + + for (i = 0; i < submit->nr_bos; i++) { + struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj; + u32 iova; + + ret = etnaviv_gem_get_iova(submit->gpu, &etnaviv_obj->base, + &iova); + if (ret) + break; + + submit->bos[i].flags |= BO_PINNED; + submit->bos[i].iova = iova; + } + + return ret; +} + +static int submit_bo(struct etnaviv_gem_submit *submit, u32 idx, + struct etnaviv_gem_object **obj, u32 *iova) +{ + if (idx >= submit->nr_bos) { + DRM_ERROR("invalid buffer index: %u (out of %u)\n", + idx, submit->nr_bos); + return -EINVAL; + } + + if (obj) + *obj = submit->bos[idx].obj; + if (iova) + *iova = submit->bos[idx].iova; + + return 0; +} + +/* process the reloc's and patch up the cmdstream as needed: */ +static int submit_reloc(struct etnaviv_gem_submit *submit, void *stream, + u32 size, const struct drm_etnaviv_gem_submit_reloc *relocs, + u32 nr_relocs) +{ + u32 i, last_offset = 0; + u32 *ptr = stream; + int ret; + + for (i = 0; i < nr_relocs; i++) { + const struct drm_etnaviv_gem_submit_reloc *r = relocs + i; + struct etnaviv_gem_object *bobj; + u32 iova, off; + + if (unlikely(r->flags)) { + DRM_ERROR("invalid reloc flags\n"); + return -EINVAL; + } + + if (r->submit_offset % 4) { + DRM_ERROR("non-aligned reloc offset: %u\n", + r->submit_offset); + return -EINVAL; + } + + /* offset in dwords: */ + off = r->submit_offset / 4; + + if ((off >= size ) || + (off < last_offset)) { + DRM_ERROR("invalid offset %u at reloc %u\n", off, i); + return -EINVAL; + } + + ret = submit_bo(submit, r->reloc_idx, &bobj, &iova); + if (ret) + return ret; + + if (r->reloc_offset >= + bobj->base.size - sizeof(*ptr)) { + DRM_ERROR("relocation %u outside object", i); + return -EINVAL; + } + + ptr[off] = iova + r->reloc_offset; + + last_offset = off; + } + + return 0; +} + +static void submit_cleanup(struct etnaviv_gem_submit *submit) +{ + unsigned i; + + for (i = 0; i < submit->nr_bos; i++) { + struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj; + + submit_unlock_object(submit, i); + drm_gem_object_unreference_unlocked(&etnaviv_obj->base); + } + + ww_acquire_fini(&submit->ticket); + kfree(submit); +} + +int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct etnaviv_drm_private *priv = dev->dev_private; + struct drm_etnaviv_gem_submit *args = data; + struct drm_etnaviv_gem_submit_reloc *relocs; + struct drm_etnaviv_gem_submit_bo *bos; + struct etnaviv_gem_submit *submit; + struct etnaviv_cmdbuf *cmdbuf; + struct etnaviv_gpu *gpu; + void *stream; + int ret; + + if (args->pipe >= ETNA_MAX_PIPES) + return -EINVAL; + + gpu = priv->gpu[args->pipe]; + if (!gpu) + return -ENXIO; + + if (args->stream_size % 4) { + DRM_ERROR("non-aligned cmdstream buffer size: %u\n", + args->stream_size); + return -EINVAL; + } + + if (args->exec_state != ETNA_PIPE_3D && + args->exec_state != ETNA_PIPE_2D && + args->exec_state != ETNA_PIPE_VG) { + DRM_ERROR("invalid exec_state: 0x%x\n", args->exec_state); + return -EINVAL; + } + + /* + * Copy the command submission and bo array to kernel space in + * one go, and do this outside of any locks. + */ + bos = drm_malloc_ab(args->nr_bos, sizeof(*bos)); + relocs = drm_malloc_ab(args->nr_relocs, sizeof(*relocs)); + stream = drm_malloc_ab(1, args->stream_size); + cmdbuf = etnaviv_gpu_cmdbuf_new(gpu, ALIGN(args->stream_size, 8) + 8, + args->nr_bos); + if (!bos || !relocs || !stream || !cmdbuf) { + ret = -ENOMEM; + goto err_submit_cmds; + } + + cmdbuf->exec_state = args->exec_state; + cmdbuf->ctx = file->driver_priv; + + ret = copy_from_user(bos, to_user_ptr(args->bos), + args->nr_bos * sizeof(*bos)); + if (ret) { + ret = -EFAULT; + goto err_submit_cmds; + } + + ret = copy_from_user(relocs, to_user_ptr(args->relocs), + args->nr_relocs * sizeof(*relocs)); + if (ret) { + ret = -EFAULT; + goto err_submit_cmds; + } + + ret = copy_from_user(stream, to_user_ptr(args->stream), + args->stream_size); + if (ret) { + ret = -EFAULT; + goto err_submit_cmds; + } + + submit = submit_create(dev, gpu, args->nr_bos); + if (!submit) { + ret = -ENOMEM; + goto err_submit_cmds; + } + + ret = submit_lookup_objects(submit, file, bos, args->nr_bos); + if (ret) + goto err_submit_objects; + + ret = submit_lock_objects(submit); + if (ret) + goto err_submit_objects; + + if (!etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4, + relocs, args->nr_relocs)) { + ret = -EINVAL; + goto err_submit_objects; + } + + ret = submit_fence_sync(submit); + if (ret) + goto err_submit_objects; + + ret = submit_pin_objects(submit); + if (ret) + goto out; + + ret = submit_reloc(submit, stream, args->stream_size / 4, + relocs, args->nr_relocs); + if (ret) + goto out; + + memcpy(cmdbuf->vaddr, stream, args->stream_size); + cmdbuf->user_size = ALIGN(args->stream_size, 8); + + ret = etnaviv_gpu_submit(gpu, submit, cmdbuf); + if (ret == 0) + cmdbuf = NULL; + + args->fence = submit->fence; + +out: + submit_unpin_objects(submit); + + /* + * If we're returning -EAGAIN, it may be due to the userptr code + * wanting to run its workqueue outside of any locks. Flush our + * workqueue to ensure that it is run in a timely manner. + */ + if (ret == -EAGAIN) + flush_workqueue(priv->wq); + +err_submit_objects: + submit_cleanup(submit); + +err_submit_cmds: + /* if we still own the cmdbuf */ + if (cmdbuf) + etnaviv_gpu_cmdbuf_free(cmdbuf); + if (stream) + drm_free_large(stream); + if (bos) + drm_free_large(bos); + if (relocs) + drm_free_large(relocs); + + return ret; +} -- cgit v1.2.3-54-g00ecf