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;
109 	xe_gt_dbg(dbm_to_gt(dbm), "using %u doorbell(s)\n", dbm->count);
114 				    unsigned int count, unsigned int spare)
119 	dbm_assert(dbm, count);
120 	dbm_assert(dbm, count <= GUC_NUM_DOORBELLS);
121 	dbm_assert(dbm, dbm->count <= GUC_NUM_DOORBELLS);
124 	if (!dbm->count)
128 		used = bitmap_weight(dbm->bitmap, dbm->count);
129 		if (used + count + spare > dbm->count)
133 	index = bitmap_find_next_zero_area(dbm->bitmap, dbm->count, 0, count, 0);
134 	if (index >= dbm->count)
137 	bitmap_set(dbm->bitmap, index, count);
143 				     unsigned int start, unsigned int count)
145 	dbm_assert(dbm, count);
146 	dbm_assert(dbm, count <= GUC_NUM_DOORBELLS);
147 	dbm_assert(dbm, dbm->count);
148 	dbm_assert(dbm, dbm->count <= GUC_NUM_DOORBELLS);
154 		for (n = 0; n < count; n++)
157 	bitmap_clear(dbm->bitmap, start, count);
188  * @count: number of GuC doorbell IDs to reserve
199 				unsigned int count, unsigned int spare)
204 	ret = dbm_reserve_chunk_locked(dbm, count, spare);
214  * @count: number of GuC doorbell IDs to release
217 				 unsigned int start, unsigned int count)
220 	dbm_release_chunk_locked(dbm, start, count);
229 	drm_printf_indent(p, indent, "count: %u\n", dbm->count);
234 	for_each_clear_bitrange(rs, re, dbm->bitmap, dbm->count) {
242 	for_each_set_bitrange(rs, re, dbm->bitmap, dbm->count) {