2 * Copyright 2015 Advanced Micro Devices, Inc.
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21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
31 #include <linux/sort.h>
32 #include <linux/uaccess.h>
35 #include "amdgpu_trace.h"
37 #define AMDGPU_BO_LIST_MAX_PRIORITY 32u
38 #define AMDGPU_BO_LIST_NUM_BUCKETS (AMDGPU_BO_LIST_MAX_PRIORITY + 1)
40 static void amdgpu_bo_list_free_rcu(struct rcu_head *rcu)
42 struct amdgpu_bo_list *list = container_of(rcu, struct amdgpu_bo_list,
44 mutex_destroy(&list->bo_list_mutex);
48 static void amdgpu_bo_list_free(struct kref *ref)
50 struct amdgpu_bo_list *list = container_of(ref, struct amdgpu_bo_list,
52 struct amdgpu_bo_list_entry *e;
54 amdgpu_bo_list_for_each_entry(e, list)
55 amdgpu_bo_unref(&e->bo);
56 call_rcu(&list->rhead, amdgpu_bo_list_free_rcu);
59 static int amdgpu_bo_list_entry_cmp(const void *_a, const void *_b)
61 const struct amdgpu_bo_list_entry *a = _a, *b = _b;
63 if (a->priority > b->priority)
65 if (a->priority < b->priority)
70 int amdgpu_bo_list_create(struct amdgpu_device *adev, struct drm_file *filp,
71 struct drm_amdgpu_bo_list_entry *info,
72 size_t num_entries, struct amdgpu_bo_list **result)
74 unsigned last_entry = 0, first_userptr = num_entries;
75 struct amdgpu_bo_list_entry *array;
76 struct amdgpu_bo_list *list;
77 uint64_t total_size = 0;
82 if (num_entries > (SIZE_MAX - sizeof(struct amdgpu_bo_list))
83 / sizeof(struct amdgpu_bo_list_entry))
86 size = sizeof(struct amdgpu_bo_list);
87 size += num_entries * sizeof(struct amdgpu_bo_list_entry);
88 list = kvmalloc(size, GFP_KERNEL);
92 kref_init(&list->refcount);
97 array = amdgpu_bo_list_array_entry(list, 0);
98 memset(array, 0, num_entries * sizeof(struct amdgpu_bo_list_entry));
100 for (i = 0; i < num_entries; ++i) {
101 struct amdgpu_bo_list_entry *entry;
102 struct drm_gem_object *gobj;
103 struct amdgpu_bo *bo;
104 struct mm_struct *usermm;
106 gobj = drm_gem_object_lookup(filp, info[i].bo_handle);
112 bo = amdgpu_bo_ref(gem_to_amdgpu_bo(gobj));
113 drm_gem_object_put(gobj);
115 usermm = amdgpu_ttm_tt_get_usermm(bo->tbo.ttm);
117 if (usermm != current->mm) {
118 amdgpu_bo_unref(&bo);
122 entry = &array[--first_userptr];
124 entry = &array[last_entry++];
127 entry->priority = min(info[i].bo_priority,
128 AMDGPU_BO_LIST_MAX_PRIORITY);
131 if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_GDS)
133 if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_GWS)
135 if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_OA)
138 total_size += amdgpu_bo_size(bo);
139 trace_amdgpu_bo_list_set(list, bo);
142 list->first_userptr = first_userptr;
143 list->num_entries = num_entries;
144 sort(array, last_entry, sizeof(struct amdgpu_bo_list_entry),
145 amdgpu_bo_list_entry_cmp, NULL);
147 trace_amdgpu_cs_bo_status(list->num_entries, total_size);
149 mutex_init(&list->bo_list_mutex);
154 for (i = 0; i < last_entry; ++i)
155 amdgpu_bo_unref(&array[i].bo);
156 for (i = first_userptr; i < num_entries; ++i)
157 amdgpu_bo_unref(&array[i].bo);
163 static void amdgpu_bo_list_destroy(struct amdgpu_fpriv *fpriv, int id)
165 struct amdgpu_bo_list *list;
167 mutex_lock(&fpriv->bo_list_lock);
168 list = idr_remove(&fpriv->bo_list_handles, id);
169 mutex_unlock(&fpriv->bo_list_lock);
171 kref_put(&list->refcount, amdgpu_bo_list_free);
174 int amdgpu_bo_list_get(struct amdgpu_fpriv *fpriv, int id,
175 struct amdgpu_bo_list **result)
178 *result = idr_find(&fpriv->bo_list_handles, id);
180 if (*result && kref_get_unless_zero(&(*result)->refcount)) {
189 void amdgpu_bo_list_put(struct amdgpu_bo_list *list)
191 kref_put(&list->refcount, amdgpu_bo_list_free);
194 int amdgpu_bo_create_list_entry_array(struct drm_amdgpu_bo_list_in *in,
195 struct drm_amdgpu_bo_list_entry **info_param)
197 const void __user *uptr = u64_to_user_ptr(in->bo_info_ptr);
198 const uint32_t info_size = sizeof(struct drm_amdgpu_bo_list_entry);
199 struct drm_amdgpu_bo_list_entry *info;
202 info = kvmalloc_array(in->bo_number, info_size, GFP_KERNEL);
206 /* copy the handle array from userspace to a kernel buffer */
208 if (likely(info_size == in->bo_info_size)) {
209 unsigned long bytes = in->bo_number *
212 if (copy_from_user(info, uptr, bytes))
216 unsigned long bytes = min(in->bo_info_size, info_size);
219 memset(info, 0, in->bo_number * info_size);
220 for (i = 0; i < in->bo_number; ++i) {
221 if (copy_from_user(&info[i], uptr, bytes))
224 uptr += in->bo_info_size;
236 int amdgpu_bo_list_ioctl(struct drm_device *dev, void *data,
237 struct drm_file *filp)
239 struct amdgpu_device *adev = drm_to_adev(dev);
240 struct amdgpu_fpriv *fpriv = filp->driver_priv;
241 union drm_amdgpu_bo_list *args = data;
242 uint32_t handle = args->in.list_handle;
243 struct drm_amdgpu_bo_list_entry *info = NULL;
244 struct amdgpu_bo_list *list, *old;
247 r = amdgpu_bo_create_list_entry_array(&args->in, &info);
251 switch (args->in.operation) {
252 case AMDGPU_BO_LIST_OP_CREATE:
253 r = amdgpu_bo_list_create(adev, filp, info, args->in.bo_number,
258 mutex_lock(&fpriv->bo_list_lock);
259 r = idr_alloc(&fpriv->bo_list_handles, list, 1, 0, GFP_KERNEL);
260 mutex_unlock(&fpriv->bo_list_lock);
268 case AMDGPU_BO_LIST_OP_DESTROY:
269 amdgpu_bo_list_destroy(fpriv, handle);
273 case AMDGPU_BO_LIST_OP_UPDATE:
274 r = amdgpu_bo_list_create(adev, filp, info, args->in.bo_number,
279 mutex_lock(&fpriv->bo_list_lock);
280 old = idr_replace(&fpriv->bo_list_handles, list, handle);
281 mutex_unlock(&fpriv->bo_list_lock);
288 amdgpu_bo_list_put(old);
296 memset(args, 0, sizeof(*args));
297 args->out.list_handle = handle;
303 amdgpu_bo_list_put(list);