| /* |
| * Copyright 2015 Advanced Micro Devices, Inc. |
| * All Rights Reserved. |
| * |
| * 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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. |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| */ |
| /* |
| * Authors: |
| * Christian König <deathsimple@vodafone.de> |
| */ |
| |
| #include <linux/uaccess.h> |
| |
| #include "amdgpu.h" |
| #include "amdgpu_trace.h" |
| |
| #define AMDGPU_BO_LIST_MAX_PRIORITY 32u |
| #define AMDGPU_BO_LIST_NUM_BUCKETS (AMDGPU_BO_LIST_MAX_PRIORITY + 1) |
| |
| static void amdgpu_bo_list_free_rcu(struct rcu_head *rcu) |
| { |
| struct amdgpu_bo_list *list = container_of(rcu, struct amdgpu_bo_list, |
| rhead); |
| |
| kvfree(list); |
| } |
| |
| static void amdgpu_bo_list_free(struct kref *ref) |
| { |
| struct amdgpu_bo_list *list = container_of(ref, struct amdgpu_bo_list, |
| refcount); |
| struct amdgpu_bo_list_entry *e; |
| |
| amdgpu_bo_list_for_each_entry(e, list) { |
| struct amdgpu_bo *bo = ttm_to_amdgpu_bo(e->tv.bo); |
| |
| amdgpu_bo_unref(&bo); |
| } |
| |
| call_rcu(&list->rhead, amdgpu_bo_list_free_rcu); |
| } |
| |
| int amdgpu_bo_list_create(struct amdgpu_device *adev, struct drm_file *filp, |
| struct drm_amdgpu_bo_list_entry *info, |
| size_t num_entries, struct amdgpu_bo_list **result) |
| { |
| unsigned last_entry = 0, first_userptr = num_entries; |
| struct amdgpu_bo_list_entry *array; |
| struct amdgpu_bo_list *list; |
| uint64_t total_size = 0; |
| size_t size; |
| unsigned i; |
| int r; |
| |
| if (num_entries > (SIZE_MAX - sizeof(struct amdgpu_bo_list)) |
| / sizeof(struct amdgpu_bo_list_entry)) |
| return -EINVAL; |
| |
| size = sizeof(struct amdgpu_bo_list); |
| size += num_entries * sizeof(struct amdgpu_bo_list_entry); |
| list = kvmalloc(size, GFP_KERNEL); |
| if (!list) |
| return -ENOMEM; |
| |
| kref_init(&list->refcount); |
| list->gds_obj = NULL; |
| list->gws_obj = NULL; |
| list->oa_obj = NULL; |
| |
| array = amdgpu_bo_list_array_entry(list, 0); |
| memset(array, 0, num_entries * sizeof(struct amdgpu_bo_list_entry)); |
| |
| for (i = 0; i < num_entries; ++i) { |
| struct amdgpu_bo_list_entry *entry; |
| struct drm_gem_object *gobj; |
| struct amdgpu_bo *bo; |
| struct mm_struct *usermm; |
| |
| gobj = drm_gem_object_lookup(filp, info[i].bo_handle); |
| if (!gobj) { |
| r = -ENOENT; |
| goto error_free; |
| } |
| |
| bo = amdgpu_bo_ref(gem_to_amdgpu_bo(gobj)); |
| drm_gem_object_put(gobj); |
| |
| usermm = amdgpu_ttm_tt_get_usermm(bo->tbo.ttm); |
| if (usermm) { |
| if (usermm != current->mm) { |
| amdgpu_bo_unref(&bo); |
| r = -EPERM; |
| goto error_free; |
| } |
| entry = &array[--first_userptr]; |
| } else { |
| entry = &array[last_entry++]; |
| } |
| |
| entry->priority = min(info[i].bo_priority, |
| AMDGPU_BO_LIST_MAX_PRIORITY); |
| entry->tv.bo = &bo->tbo; |
| |
| if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_GDS) |
| list->gds_obj = bo; |
| if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_GWS) |
| list->gws_obj = bo; |
| if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_OA) |
| list->oa_obj = bo; |
| |
| total_size += amdgpu_bo_size(bo); |
| trace_amdgpu_bo_list_set(list, bo); |
| } |
| |
| list->first_userptr = first_userptr; |
| list->num_entries = num_entries; |
| |
| trace_amdgpu_cs_bo_status(list->num_entries, total_size); |
| |
| *result = list; |
| return 0; |
| |
| error_free: |
| for (i = 0; i < last_entry; ++i) { |
| struct amdgpu_bo *bo = ttm_to_amdgpu_bo(array[i].tv.bo); |
| |
| amdgpu_bo_unref(&bo); |
| } |
| for (i = first_userptr; i < num_entries; ++i) { |
| struct amdgpu_bo *bo = ttm_to_amdgpu_bo(array[i].tv.bo); |
| |
| amdgpu_bo_unref(&bo); |
| } |
| kvfree(list); |
| return r; |
| |
| } |
| |
| static void amdgpu_bo_list_destroy(struct amdgpu_fpriv *fpriv, int id) |
| { |
| struct amdgpu_bo_list *list; |
| |
| mutex_lock(&fpriv->bo_list_lock); |
| list = idr_remove(&fpriv->bo_list_handles, id); |
| mutex_unlock(&fpriv->bo_list_lock); |
| if (list) |
| kref_put(&list->refcount, amdgpu_bo_list_free); |
| } |
| |
| int amdgpu_bo_list_get(struct amdgpu_fpriv *fpriv, int id, |
| struct amdgpu_bo_list **result) |
| { |
| rcu_read_lock(); |
| *result = idr_find(&fpriv->bo_list_handles, id); |
| |
| if (*result && kref_get_unless_zero(&(*result)->refcount)) { |
| rcu_read_unlock(); |
| return 0; |
| } |
| |
| rcu_read_unlock(); |
| return -ENOENT; |
| } |
| |
| void amdgpu_bo_list_get_list(struct amdgpu_bo_list *list, |
| struct list_head *validated) |
| { |
| /* This is based on the bucket sort with O(n) time complexity. |
| * An item with priority "i" is added to bucket[i]. The lists are then |
| * concatenated in descending order. |
| */ |
| struct list_head bucket[AMDGPU_BO_LIST_NUM_BUCKETS]; |
| struct amdgpu_bo_list_entry *e; |
| unsigned i; |
| |
| for (i = 0; i < AMDGPU_BO_LIST_NUM_BUCKETS; i++) |
| INIT_LIST_HEAD(&bucket[i]); |
| |
| /* Since buffers which appear sooner in the relocation list are |
| * likely to be used more often than buffers which appear later |
| * in the list, the sort mustn't change the ordering of buffers |
| * with the same priority, i.e. it must be stable. |
| */ |
| amdgpu_bo_list_for_each_entry(e, list) { |
| struct amdgpu_bo *bo = ttm_to_amdgpu_bo(e->tv.bo); |
| unsigned priority = e->priority; |
| |
| if (!bo->parent) |
| list_add_tail(&e->tv.head, &bucket[priority]); |
| |
| e->user_pages = NULL; |
| } |
| |
| /* Connect the sorted buckets in the output list. */ |
| for (i = 0; i < AMDGPU_BO_LIST_NUM_BUCKETS; i++) |
| list_splice(&bucket[i], validated); |
| } |
| |
| void amdgpu_bo_list_put(struct amdgpu_bo_list *list) |
| { |
| kref_put(&list->refcount, amdgpu_bo_list_free); |
| } |
| |
| int amdgpu_bo_create_list_entry_array(struct drm_amdgpu_bo_list_in *in, |
| struct drm_amdgpu_bo_list_entry **info_param) |
| { |
| const void __user *uptr = u64_to_user_ptr(in->bo_info_ptr); |
| const uint32_t info_size = sizeof(struct drm_amdgpu_bo_list_entry); |
| struct drm_amdgpu_bo_list_entry *info; |
| int r; |
| |
| info = kvmalloc_array(in->bo_number, info_size, GFP_KERNEL); |
| if (!info) |
| return -ENOMEM; |
| |
| /* copy the handle array from userspace to a kernel buffer */ |
| r = -EFAULT; |
| if (likely(info_size == in->bo_info_size)) { |
| unsigned long bytes = in->bo_number * |
| in->bo_info_size; |
| |
| if (copy_from_user(info, uptr, bytes)) |
| goto error_free; |
| |
| } else { |
| unsigned long bytes = min(in->bo_info_size, info_size); |
| unsigned i; |
| |
| memset(info, 0, in->bo_number * info_size); |
| for (i = 0; i < in->bo_number; ++i) { |
| if (copy_from_user(&info[i], uptr, bytes)) |
| goto error_free; |
| |
| uptr += in->bo_info_size; |
| } |
| } |
| |
| *info_param = info; |
| return 0; |
| |
| error_free: |
| kvfree(info); |
| return r; |
| } |
| |
| int amdgpu_bo_list_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *filp) |
| { |
| struct amdgpu_device *adev = drm_to_adev(dev); |
| struct amdgpu_fpriv *fpriv = filp->driver_priv; |
| union drm_amdgpu_bo_list *args = data; |
| uint32_t handle = args->in.list_handle; |
| struct drm_amdgpu_bo_list_entry *info = NULL; |
| struct amdgpu_bo_list *list, *old; |
| int r; |
| |
| r = amdgpu_bo_create_list_entry_array(&args->in, &info); |
| if (r) |
| return r; |
| |
| switch (args->in.operation) { |
| case AMDGPU_BO_LIST_OP_CREATE: |
| r = amdgpu_bo_list_create(adev, filp, info, args->in.bo_number, |
| &list); |
| if (r) |
| goto error_free; |
| |
| mutex_lock(&fpriv->bo_list_lock); |
| r = idr_alloc(&fpriv->bo_list_handles, list, 1, 0, GFP_KERNEL); |
| mutex_unlock(&fpriv->bo_list_lock); |
| if (r < 0) { |
| goto error_put_list; |
| } |
| |
| handle = r; |
| break; |
| |
| case AMDGPU_BO_LIST_OP_DESTROY: |
| amdgpu_bo_list_destroy(fpriv, handle); |
| handle = 0; |
| break; |
| |
| case AMDGPU_BO_LIST_OP_UPDATE: |
| r = amdgpu_bo_list_create(adev, filp, info, args->in.bo_number, |
| &list); |
| if (r) |
| goto error_free; |
| |
| mutex_lock(&fpriv->bo_list_lock); |
| old = idr_replace(&fpriv->bo_list_handles, list, handle); |
| mutex_unlock(&fpriv->bo_list_lock); |
| |
| if (IS_ERR(old)) { |
| r = PTR_ERR(old); |
| goto error_put_list; |
| } |
| |
| amdgpu_bo_list_put(old); |
| break; |
| |
| default: |
| r = -EINVAL; |
| goto error_free; |
| } |
| |
| memset(args, 0, sizeof(*args)); |
| args->out.list_handle = handle; |
| kvfree(info); |
| |
| return 0; |
| |
| error_put_list: |
| amdgpu_bo_list_put(list); |
| |
| error_free: |
| kvfree(info); |
| return r; |
| } |