drm/xe/xe_guc_db_mgr.c

58 	weight = bitmap_weight(dbm->bitmap, dbm->count);
63 			  weight, dbm->count);
69 	dbm->count = 0;
77  * @count: number of doorbells to manage
79  * The bare-metal or PF driver can pass ~0 as &count to indicate that all
87 int xe_guc_db_mgr_init(struct xe_guc_db_mgr *dbm, unsigned int count)
91 	if (count == ~0)
92 		count = GUC_NUM_DOORBELLS;
95 	dbm_assert(dbm, count <= GUC_NUM_DOORBELLS);
97 	if (!count)
100 	dbm->bitmap = bitmap_zalloc(count, GFP_KERNEL);
103 	dbm->count = count;
110 		  dbm->count, str_plural(dbm->count));
115 				    unsigned int count, unsigned int spare)
120 	dbm_assert(dbm, count);
121 	dbm_assert(dbm, count <= GUC_NUM_DOORBELLS);
122 	dbm_assert(dbm, dbm->count <= GUC_NUM_DOORBELLS);
125 	if (!dbm->count)
129 		used = bitmap_weight(dbm->bitmap, dbm->count);
130 		if (used + count + spare > dbm->count)
134 	index = bitmap_find_next_zero_area(dbm->bitmap, dbm->count, 0, count, 0);
135 	if (index >= dbm->count)
138 	bitmap_set(dbm->bitmap, index, count);
144 				     unsigned int start, unsigned int count)
146 	dbm_assert(dbm, count);
147 	dbm_assert(dbm, count <= GUC_NUM_DOORBELLS);
148 	dbm_assert(dbm, dbm->count);
149 	dbm_assert(dbm, dbm->count <= GUC_NUM_DOORBELLS);
155 		for (n = 0; n < count; n++)
158 	bitmap_clear(dbm->bitmap, start, count);
189  * @count: number of GuC doorbell IDs to reserve
200 				unsigned int count, unsigned int spare)
205 	ret = dbm_reserve_chunk_locked(dbm, count, spare);
215  * @count: number of GuC doorbell IDs to release
218 				 unsigned int start, unsigned int count)
221 	dbm_release_chunk_locked(dbm, start, count);
230 	drm_printf_indent(p, indent, "count: %u\n", dbm->count);
235 	for_each_clear_bitrange(rs, re, dbm->bitmap, dbm->count) {
243 	for_each_set_bitrange(rs, re, dbm->bitmap, dbm->count) {