s390/cio/airq.c

130 	struct airq_iv *iv;
133 	iv = kzalloc(sizeof(*iv), GFP_KERNEL);
134 	if (!iv)
136 	iv->bits = bits;
137 	iv->flags = flags;
145 		iv->vector = dma_pool_zalloc(airq_iv_cache, GFP_KERNEL,
146 					     &iv->vector_dma);
147 		if (!iv->vector)
150 		iv->vector = vec;
152 		iv->vector = cio_dma_zalloc(size);
153 		if (!iv->vector)
157 		iv->avail = kmalloc(size, GFP_KERNEL);
158 		if (!iv->avail)
160 		memset(iv->avail, 0xff, size);
161 		iv->end = 0;
163 		iv->end = bits;
165 		iv->bitlock = kzalloc(size, GFP_KERNEL);
166 		if (!iv->bitlock)
171 		iv->ptr = kzalloc(size, GFP_KERNEL);
172 		if (!iv->ptr)
177 		iv->data = kzalloc(size, GFP_KERNEL);
178 		if (!iv->data)
181 	spin_lock_init(&iv->lock);
182 	return iv;
185 	kfree(iv->ptr);
186 	kfree(iv->bitlock);
187 	kfree(iv->avail);
188 	if (iv->flags & AIRQ_IV_CACHELINE && iv->vector)
189 		dma_pool_free(airq_iv_cache, iv->vector, iv->vector_dma);
190 	else if (!(iv->flags & AIRQ_IV_GUESTVEC))
191 		cio_dma_free(iv->vector, size);
192 	kfree(iv);
200  * @iv: pointer to interrupt vector structure
202 void airq_iv_release(struct airq_iv *iv)
204 	kfree(iv->data);
205 	kfree(iv->ptr);
206 	kfree(iv->bitlock);
207 	if (iv->flags & AIRQ_IV_CACHELINE)
208 		dma_pool_free(airq_iv_cache, iv->vector, iv->vector_dma);
209 	else if (!(iv->flags & AIRQ_IV_GUESTVEC))
210 		cio_dma_free(iv->vector, iv_size(iv->bits));
211 	kfree(iv->avail);
212 	kfree(iv);
218  * @iv: pointer to an interrupt vector structure
225 unsigned long airq_iv_alloc(struct airq_iv *iv, unsigned long num)
229 	if (!iv->avail || num == 0)
231 	spin_lock_irqsave(&iv->lock, flags);
232 	bit = find_first_bit_inv(iv->avail, iv->bits);
233 	while (bit + num <= iv->bits) {
235 			if (!test_bit_inv(bit + i, iv->avail))
240 				clear_bit_inv(bit + i, iv->avail);
241 			if (bit + num >= iv->end)
242 				iv->end = bit + num + 1;
245 		bit = find_next_bit_inv(iv->avail, iv->bits, bit + i + 1);
247 	if (bit + num > iv->bits)
249 	spin_unlock_irqrestore(&iv->lock, flags);
256  * @iv: pointer to interrupt vector structure
260 void airq_iv_free(struct airq_iv *iv, unsigned long bit, unsigned long num)
264 	if (!iv->avail || num == 0)
266 	spin_lock_irqsave(&iv->lock, flags);
269 		clear_bit_inv(bit + i, iv->vector);
271 		set_bit_inv(bit + i, iv->avail);
273 	if (bit + num >= iv->end) {
275 		while (iv->end > 0 && !test_bit_inv(iv->end - 1, iv->avail))
276 			iv->end--;
278 	spin_unlock_irqrestore(&iv->lock, flags);
284  * @iv: pointer to interrupt vector structure
291 unsigned long airq_iv_scan(struct airq_iv *iv, unsigned long start,
297 	bit = find_next_bit_inv(iv->vector, end, start);
300 	clear_bit_inv(bit, iv->vector);