From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/gpu/drm/msm/msm_gem_submit.c | 427 ++++++++++++++++++++++++++++ 1 file changed, 427 insertions(+) create mode 100644 kernel/drivers/gpu/drm/msm/msm_gem_submit.c (limited to 'kernel/drivers/gpu/drm/msm/msm_gem_submit.c') diff --git a/kernel/drivers/gpu/drm/msm/msm_gem_submit.c b/kernel/drivers/gpu/drm/msm/msm_gem_submit.c new file mode 100644 index 000000000..cd0554f68 --- /dev/null +++ b/kernel/drivers/gpu/drm/msm/msm_gem_submit.c @@ -0,0 +1,427 @@ +/* + * Copyright (C) 2013 Red Hat + * Author: Rob Clark + * + * 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 "msm_drv.h" +#include "msm_gpu.h" +#include "msm_gem.h" + +/* + * Cmdstream submission: + */ + +/* make sure these don't conflict w/ MSM_SUBMIT_BO_x */ +#define BO_VALID 0x8000 +#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 msm_gem_submit *submit_create(struct drm_device *dev, + struct msm_gpu *gpu, int nr) +{ + struct msm_gem_submit *submit; + int sz = sizeof(*submit) + (nr * sizeof(submit->bos[0])); + + 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; + submit->nr_cmds = 0; + + INIT_LIST_HEAD(&submit->bo_list); + ww_acquire_init(&submit->ticket, &reservation_ww_class); + } + + return submit; +} + +static int submit_lookup_objects(struct msm_gem_submit *submit, + struct drm_msm_gem_submit *args, struct drm_file *file) +{ + unsigned i; + int ret = 0; + + spin_lock(&file->table_lock); + + for (i = 0; i < args->nr_bos; i++) { + struct drm_msm_gem_submit_bo submit_bo; + struct drm_gem_object *obj; + struct msm_gem_object *msm_obj; + void __user *userptr = + to_user_ptr(args->bos + (i * sizeof(submit_bo))); + + ret = copy_from_user(&submit_bo, userptr, sizeof(submit_bo)); + if (ret) { + ret = -EFAULT; + goto out_unlock; + } + + if (submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) { + DRM_ERROR("invalid flags: %x\n", submit_bo.flags); + ret = -EINVAL; + goto out_unlock; + } + + submit->bos[i].flags = submit_bo.flags; + /* in validate_objects() we figure out if this is true: */ + submit->bos[i].iova = submit_bo.presumed; + + /* 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, submit_bo.handle); + if (!obj) { + DRM_ERROR("invalid handle %u at index %u\n", submit_bo.handle, i); + ret = -EINVAL; + goto out_unlock; + } + + msm_obj = to_msm_bo(obj); + + if (!list_empty(&msm_obj->submit_entry)) { + DRM_ERROR("handle %u at index %u already on submit list\n", + submit_bo.handle, i); + ret = -EINVAL; + goto out_unlock; + } + + drm_gem_object_reference(obj); + + submit->bos[i].obj = msm_obj; + + list_add_tail(&msm_obj->submit_entry, &submit->bo_list); + } + +out_unlock: + submit->nr_bos = i; + spin_unlock(&file->table_lock); + + return ret; +} + +static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i) +{ + struct msm_gem_object *msm_obj = submit->bos[i].obj; + + if (submit->bos[i].flags & BO_PINNED) + msm_gem_put_iova(&msm_obj->base, submit->gpu->id); + + if (submit->bos[i].flags & BO_LOCKED) + ww_mutex_unlock(&msm_obj->resv->lock); + + if (!(submit->bos[i].flags & BO_VALID)) + submit->bos[i].iova = 0; + + submit->bos[i].flags &= ~(BO_LOCKED | BO_PINNED); +} + +/* This is where we make sure all the bo's are reserved and pin'd: */ +static int submit_validate_objects(struct msm_gem_submit *submit) +{ + int contended, slow_locked = -1, i, ret = 0; + +retry: + submit->valid = true; + + for (i = 0; i < submit->nr_bos; i++) { + struct msm_gem_object *msm_obj = submit->bos[i].obj; + uint32_t iova; + + if (slow_locked == i) + slow_locked = -1; + + contended = i; + + if (!(submit->bos[i].flags & BO_LOCKED)) { + ret = ww_mutex_lock_interruptible(&msm_obj->resv->lock, + &submit->ticket); + if (ret) + goto fail; + submit->bos[i].flags |= BO_LOCKED; + } + + + /* if locking succeeded, pin bo: */ + ret = msm_gem_get_iova_locked(&msm_obj->base, + submit->gpu->id, &iova); + + /* this would break the logic in the fail path.. there is no + * reason for this to happen, but just to be on the safe side + * let's notice if this starts happening in the future: + */ + WARN_ON(ret == -EDEADLK); + + if (ret) + goto fail; + + submit->bos[i].flags |= BO_PINNED; + + if (iova == submit->bos[i].iova) { + submit->bos[i].flags |= BO_VALID; + } else { + submit->bos[i].iova = iova; + submit->bos[i].flags &= ~BO_VALID; + submit->valid = false; + } + } + + ww_acquire_done(&submit->ticket); + + return 0; + +fail: + for (; i >= 0; i--) + submit_unlock_unpin_bo(submit, i); + + if (slow_locked > 0) + submit_unlock_unpin_bo(submit, slow_locked); + + if (ret == -EDEADLK) { + struct msm_gem_object *msm_obj = submit->bos[contended].obj; + /* we lost out in a seqno race, lock and retry.. */ + ret = ww_mutex_lock_slow_interruptible(&msm_obj->resv->lock, + &submit->ticket); + if (!ret) { + submit->bos[contended].flags |= BO_LOCKED; + slow_locked = contended; + goto retry; + } + } + + return ret; +} + +static int submit_bo(struct msm_gem_submit *submit, uint32_t idx, + struct msm_gem_object **obj, uint32_t *iova, bool *valid) +{ + 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; + if (valid) + *valid = !!(submit->bos[idx].flags & BO_VALID); + + return 0; +} + +/* process the reloc's and patch up the cmdstream as needed: */ +static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj, + uint32_t offset, uint32_t nr_relocs, uint64_t relocs) +{ + uint32_t i, last_offset = 0; + uint32_t *ptr; + int ret; + + if (offset % 4) { + DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset); + return -EINVAL; + } + + /* For now, just map the entire thing. Eventually we probably + * to do it page-by-page, w/ kmap() if not vmap()d.. + */ + ptr = msm_gem_vaddr_locked(&obj->base); + + if (IS_ERR(ptr)) { + ret = PTR_ERR(ptr); + DBG("failed to map: %d", ret); + return ret; + } + + for (i = 0; i < nr_relocs; i++) { + struct drm_msm_gem_submit_reloc submit_reloc; + void __user *userptr = + to_user_ptr(relocs + (i * sizeof(submit_reloc))); + uint32_t iova, off; + bool valid; + + ret = copy_from_user(&submit_reloc, userptr, sizeof(submit_reloc)); + if (ret) + return -EFAULT; + + if (submit_reloc.submit_offset % 4) { + DRM_ERROR("non-aligned reloc offset: %u\n", + submit_reloc.submit_offset); + return -EINVAL; + } + + /* offset in dwords: */ + off = submit_reloc.submit_offset / 4; + + if ((off >= (obj->base.size / 4)) || + (off < last_offset)) { + DRM_ERROR("invalid offset %u at reloc %u\n", off, i); + return -EINVAL; + } + + ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid); + if (ret) + return ret; + + if (valid) + continue; + + iova += submit_reloc.reloc_offset; + + if (submit_reloc.shift < 0) + iova >>= -submit_reloc.shift; + else + iova <<= submit_reloc.shift; + + ptr[off] = iova | submit_reloc.or; + + last_offset = off; + } + + return 0; +} + +static void submit_cleanup(struct msm_gem_submit *submit, bool fail) +{ + unsigned i; + + for (i = 0; i < submit->nr_bos; i++) { + struct msm_gem_object *msm_obj = submit->bos[i].obj; + submit_unlock_unpin_bo(submit, i); + list_del_init(&msm_obj->submit_entry); + drm_gem_object_unreference(&msm_obj->base); + } + + ww_acquire_fini(&submit->ticket); + kfree(submit); +} + +int msm_ioctl_gem_submit(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct msm_drm_private *priv = dev->dev_private; + struct drm_msm_gem_submit *args = data; + struct msm_file_private *ctx = file->driver_priv; + struct msm_gem_submit *submit; + struct msm_gpu *gpu; + unsigned i; + int ret; + + /* for now, we just have 3d pipe.. eventually this would need to + * be more clever to dispatch to appropriate gpu module: + */ + if (args->pipe != MSM_PIPE_3D0) + return -EINVAL; + + gpu = priv->gpu; + + if (args->nr_cmds > MAX_CMDS) + return -EINVAL; + + mutex_lock(&dev->struct_mutex); + + submit = submit_create(dev, gpu, args->nr_bos); + if (!submit) { + ret = -ENOMEM; + goto out; + } + + ret = submit_lookup_objects(submit, args, file); + if (ret) + goto out; + + ret = submit_validate_objects(submit); + if (ret) + goto out; + + for (i = 0; i < args->nr_cmds; i++) { + struct drm_msm_gem_submit_cmd submit_cmd; + void __user *userptr = + to_user_ptr(args->cmds + (i * sizeof(submit_cmd))); + struct msm_gem_object *msm_obj; + uint32_t iova; + + ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd)); + if (ret) { + ret = -EFAULT; + goto out; + } + + /* validate input from userspace: */ + switch (submit_cmd.type) { + case MSM_SUBMIT_CMD_BUF: + case MSM_SUBMIT_CMD_IB_TARGET_BUF: + case MSM_SUBMIT_CMD_CTX_RESTORE_BUF: + break; + default: + DRM_ERROR("invalid type: %08x\n", submit_cmd.type); + ret = -EINVAL; + goto out; + } + + ret = submit_bo(submit, submit_cmd.submit_idx, + &msm_obj, &iova, NULL); + if (ret) + goto out; + + if (submit_cmd.size % 4) { + DRM_ERROR("non-aligned cmdstream buffer size: %u\n", + submit_cmd.size); + ret = -EINVAL; + goto out; + } + + if ((submit_cmd.size + submit_cmd.submit_offset) >= + msm_obj->base.size) { + DRM_ERROR("invalid cmdstream size: %u\n", submit_cmd.size); + ret = -EINVAL; + goto out; + } + + submit->cmd[i].type = submit_cmd.type; + submit->cmd[i].size = submit_cmd.size / 4; + submit->cmd[i].iova = iova + submit_cmd.submit_offset; + submit->cmd[i].idx = submit_cmd.submit_idx; + + if (submit->valid) + continue; + + ret = submit_reloc(submit, msm_obj, submit_cmd.submit_offset, + submit_cmd.nr_relocs, submit_cmd.relocs); + if (ret) + goto out; + } + + submit->nr_cmds = i; + + ret = msm_gpu_submit(gpu, submit, ctx); + + args->fence = submit->fence; + +out: + if (submit) + submit_cleanup(submit, !!ret); + mutex_unlock(&dev->struct_mutex); + return ret; +} -- cgit 1.2.3-korg