2 * Copyright 2015 Advanced Micro Devices, Inc.
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33 #include "amdgpu_trace.h"
35 #define AMDGPU_BO_LIST_MAX_PRIORITY 32u
36 #define AMDGPU_BO_LIST_NUM_BUCKETS (AMDGPU_BO_LIST_MAX_PRIORITY + 1)
38 static int amdgpu_bo_list_create(struct amdgpu_fpriv *fpriv,
39 struct amdgpu_bo_list **result,
44 *result = kzalloc(sizeof(struct amdgpu_bo_list), GFP_KERNEL);
48 mutex_lock(&fpriv->bo_list_lock);
49 r = idr_alloc(&fpriv->bo_list_handles, *result,
52 mutex_unlock(&fpriv->bo_list_lock);
58 mutex_init(&(*result)->lock);
59 (*result)->num_entries = 0;
60 (*result)->array = NULL;
62 mutex_lock(&(*result)->lock);
63 mutex_unlock(&fpriv->bo_list_lock);
68 static void amdgpu_bo_list_destroy(struct amdgpu_fpriv *fpriv, int id)
70 struct amdgpu_bo_list *list;
72 mutex_lock(&fpriv->bo_list_lock);
73 list = idr_find(&fpriv->bo_list_handles, id);
75 mutex_lock(&list->lock);
76 idr_remove(&fpriv->bo_list_handles, id);
77 mutex_unlock(&list->lock);
78 amdgpu_bo_list_free(list);
80 mutex_unlock(&fpriv->bo_list_lock);
83 static int amdgpu_bo_list_set(struct amdgpu_device *adev,
84 struct drm_file *filp,
85 struct amdgpu_bo_list *list,
86 struct drm_amdgpu_bo_list_entry *info,
89 struct amdgpu_bo_list_entry *array;
90 struct amdgpu_bo *gds_obj = adev->gds.gds_gfx_bo;
91 struct amdgpu_bo *gws_obj = adev->gds.gws_gfx_bo;
92 struct amdgpu_bo *oa_obj = adev->gds.oa_gfx_bo;
94 unsigned last_entry = 0, first_userptr = num_entries;
98 array = drm_malloc_ab(num_entries, sizeof(struct amdgpu_bo_list_entry));
101 memset(array, 0, num_entries * sizeof(struct amdgpu_bo_list_entry));
103 for (i = 0; i < num_entries; ++i) {
104 struct amdgpu_bo_list_entry *entry;
105 struct drm_gem_object *gobj;
106 struct amdgpu_bo *bo;
107 struct mm_struct *usermm;
109 gobj = drm_gem_object_lookup(adev->ddev, filp, info[i].bo_handle);
115 bo = amdgpu_bo_ref(gem_to_amdgpu_bo(gobj));
116 drm_gem_object_unreference_unlocked(gobj);
118 usermm = amdgpu_ttm_tt_get_usermm(bo->tbo.ttm);
120 if (usermm != current->mm) {
121 amdgpu_bo_unref(&bo);
125 entry = &array[--first_userptr];
127 entry = &array[last_entry++];
131 entry->priority = min(info[i].bo_priority,
132 AMDGPU_BO_LIST_MAX_PRIORITY);
133 entry->tv.bo = &entry->robj->tbo;
134 entry->tv.shared = true;
136 if (entry->robj->prefered_domains == AMDGPU_GEM_DOMAIN_GDS)
137 gds_obj = entry->robj;
138 if (entry->robj->prefered_domains == AMDGPU_GEM_DOMAIN_GWS)
139 gws_obj = entry->robj;
140 if (entry->robj->prefered_domains == AMDGPU_GEM_DOMAIN_OA)
141 oa_obj = entry->robj;
143 trace_amdgpu_bo_list_set(list, entry->robj);
146 for (i = 0; i < list->num_entries; ++i)
147 amdgpu_bo_unref(&list->array[i].robj);
149 drm_free_large(list->array);
151 list->gds_obj = gds_obj;
152 list->gws_obj = gws_obj;
153 list->oa_obj = oa_obj;
154 list->first_userptr = first_userptr;
156 list->num_entries = num_entries;
162 amdgpu_bo_unref(&array[i].robj);
163 drm_free_large(array);
167 struct amdgpu_bo_list *
168 amdgpu_bo_list_get(struct amdgpu_fpriv *fpriv, int id)
170 struct amdgpu_bo_list *result;
172 mutex_lock(&fpriv->bo_list_lock);
173 result = idr_find(&fpriv->bo_list_handles, id);
175 mutex_lock(&result->lock);
176 mutex_unlock(&fpriv->bo_list_lock);
180 void amdgpu_bo_list_get_list(struct amdgpu_bo_list *list,
181 struct list_head *validated)
183 /* This is based on the bucket sort with O(n) time complexity.
184 * An item with priority "i" is added to bucket[i]. The lists are then
185 * concatenated in descending order.
187 struct list_head bucket[AMDGPU_BO_LIST_NUM_BUCKETS];
190 for (i = 0; i < AMDGPU_BO_LIST_NUM_BUCKETS; i++)
191 INIT_LIST_HEAD(&bucket[i]);
193 /* Since buffers which appear sooner in the relocation list are
194 * likely to be used more often than buffers which appear later
195 * in the list, the sort mustn't change the ordering of buffers
196 * with the same priority, i.e. it must be stable.
198 for (i = 0; i < list->num_entries; i++) {
199 unsigned priority = list->array[i].priority;
201 list_add_tail(&list->array[i].tv.head,
203 list->array[i].user_pages = NULL;
206 /* Connect the sorted buckets in the output list. */
207 for (i = 0; i < AMDGPU_BO_LIST_NUM_BUCKETS; i++)
208 list_splice(&bucket[i], validated);
211 void amdgpu_bo_list_put(struct amdgpu_bo_list *list)
213 mutex_unlock(&list->lock);
216 void amdgpu_bo_list_free(struct amdgpu_bo_list *list)
220 for (i = 0; i < list->num_entries; ++i)
221 amdgpu_bo_unref(&list->array[i].robj);
223 mutex_destroy(&list->lock);
224 drm_free_large(list->array);
228 int amdgpu_bo_list_ioctl(struct drm_device *dev, void *data,
229 struct drm_file *filp)
231 const uint32_t info_size = sizeof(struct drm_amdgpu_bo_list_entry);
233 struct amdgpu_device *adev = dev->dev_private;
234 struct amdgpu_fpriv *fpriv = filp->driver_priv;
235 union drm_amdgpu_bo_list *args = data;
236 uint32_t handle = args->in.list_handle;
237 const void __user *uptr = (const void*)(long)args->in.bo_info_ptr;
239 struct drm_amdgpu_bo_list_entry *info;
240 struct amdgpu_bo_list *list;
244 info = drm_malloc_ab(args->in.bo_number,
245 sizeof(struct drm_amdgpu_bo_list_entry));
249 /* copy the handle array from userspace to a kernel buffer */
251 if (likely(info_size == args->in.bo_info_size)) {
252 unsigned long bytes = args->in.bo_number *
253 args->in.bo_info_size;
255 if (copy_from_user(info, uptr, bytes))
259 unsigned long bytes = min(args->in.bo_info_size, info_size);
262 memset(info, 0, args->in.bo_number * info_size);
263 for (i = 0; i < args->in.bo_number; ++i) {
264 if (copy_from_user(&info[i], uptr, bytes))
267 uptr += args->in.bo_info_size;
271 switch (args->in.operation) {
272 case AMDGPU_BO_LIST_OP_CREATE:
273 r = amdgpu_bo_list_create(fpriv, &list, &handle);
277 r = amdgpu_bo_list_set(adev, filp, list, info,
279 amdgpu_bo_list_put(list);
285 case AMDGPU_BO_LIST_OP_DESTROY:
286 amdgpu_bo_list_destroy(fpriv, handle);
290 case AMDGPU_BO_LIST_OP_UPDATE:
292 list = amdgpu_bo_list_get(fpriv, handle);
296 r = amdgpu_bo_list_set(adev, filp, list, info,
298 amdgpu_bo_list_put(list);
309 memset(args, 0, sizeof(*args));
310 args->out.list_handle = handle;
311 drm_free_large(info);
316 drm_free_large(info);