Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/s390/cio/qdio_main.c |
| 3 | * |
| 4 | * Linux for s390 qdio support, buffer handling, qdio API and module support. |
| 5 | * |
| 6 | * Copyright 2000,2008 IBM Corp. |
| 7 | * Author(s): Utz Bacher <utz.bacher@de.ibm.com> |
| 8 | * Jan Glauber <jang@linux.vnet.ibm.com> |
| 9 | * 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com> |
| 10 | */ |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/timer.h> |
| 15 | #include <linux/delay.h> |
| 16 | #include <asm/atomic.h> |
| 17 | #include <asm/debug.h> |
| 18 | #include <asm/qdio.h> |
| 19 | |
| 20 | #include "cio.h" |
| 21 | #include "css.h" |
| 22 | #include "device.h" |
| 23 | #include "qdio.h" |
| 24 | #include "qdio_debug.h" |
| 25 | #include "qdio_perf.h" |
| 26 | |
| 27 | MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>,"\ |
| 28 | "Jan Glauber <jang@linux.vnet.ibm.com>"); |
| 29 | MODULE_DESCRIPTION("QDIO base support"); |
| 30 | MODULE_LICENSE("GPL"); |
| 31 | |
| 32 | static inline int do_siga_sync(struct subchannel_id schid, |
| 33 | unsigned int out_mask, unsigned int in_mask) |
| 34 | { |
| 35 | register unsigned long __fc asm ("0") = 2; |
| 36 | register struct subchannel_id __schid asm ("1") = schid; |
| 37 | register unsigned long out asm ("2") = out_mask; |
| 38 | register unsigned long in asm ("3") = in_mask; |
| 39 | int cc; |
| 40 | |
| 41 | asm volatile( |
| 42 | " siga 0\n" |
| 43 | " ipm %0\n" |
| 44 | " srl %0,28\n" |
| 45 | : "=d" (cc) |
| 46 | : "d" (__fc), "d" (__schid), "d" (out), "d" (in) : "cc"); |
| 47 | return cc; |
| 48 | } |
| 49 | |
| 50 | static inline int do_siga_input(struct subchannel_id schid, unsigned int mask) |
| 51 | { |
| 52 | register unsigned long __fc asm ("0") = 1; |
| 53 | register struct subchannel_id __schid asm ("1") = schid; |
| 54 | register unsigned long __mask asm ("2") = mask; |
| 55 | int cc; |
| 56 | |
| 57 | asm volatile( |
| 58 | " siga 0\n" |
| 59 | " ipm %0\n" |
| 60 | " srl %0,28\n" |
| 61 | : "=d" (cc) |
| 62 | : "d" (__fc), "d" (__schid), "d" (__mask) : "cc", "memory"); |
| 63 | return cc; |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * do_siga_output - perform SIGA-w/wt function |
| 68 | * @schid: subchannel id or in case of QEBSM the subchannel token |
| 69 | * @mask: which output queues to process |
| 70 | * @bb: busy bit indicator, set only if SIGA-w/wt could not access a buffer |
| 71 | * @fc: function code to perform |
| 72 | * |
| 73 | * Returns cc or QDIO_ERROR_SIGA_ACCESS_EXCEPTION. |
| 74 | * Note: For IQDC unicast queues only the highest priority queue is processed. |
| 75 | */ |
| 76 | static inline int do_siga_output(unsigned long schid, unsigned long mask, |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 77 | unsigned int *bb, unsigned int fc) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 78 | { |
| 79 | register unsigned long __fc asm("0") = fc; |
| 80 | register unsigned long __schid asm("1") = schid; |
| 81 | register unsigned long __mask asm("2") = mask; |
| 82 | int cc = QDIO_ERROR_SIGA_ACCESS_EXCEPTION; |
| 83 | |
| 84 | asm volatile( |
| 85 | " siga 0\n" |
| 86 | "0: ipm %0\n" |
| 87 | " srl %0,28\n" |
| 88 | "1:\n" |
| 89 | EX_TABLE(0b, 1b) |
| 90 | : "+d" (cc), "+d" (__fc), "+d" (__schid), "+d" (__mask) |
| 91 | : : "cc", "memory"); |
| 92 | *bb = ((unsigned int) __fc) >> 31; |
| 93 | return cc; |
| 94 | } |
| 95 | |
| 96 | static inline int qdio_check_ccq(struct qdio_q *q, unsigned int ccq) |
| 97 | { |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 98 | /* all done or next buffer state different */ |
| 99 | if (ccq == 0 || ccq == 32) |
| 100 | return 0; |
| 101 | /* not all buffers processed */ |
| 102 | if (ccq == 96 || ccq == 97) |
| 103 | return 1; |
| 104 | /* notify devices immediately */ |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 105 | DBF_ERROR("%4x ccq:%3d", SCH_NO(q), ccq); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 106 | return -EIO; |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * qdio_do_eqbs - extract buffer states for QEBSM |
| 111 | * @q: queue to manipulate |
| 112 | * @state: state of the extracted buffers |
| 113 | * @start: buffer number to start at |
| 114 | * @count: count of buffers to examine |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 115 | * @auto_ack: automatically acknowledge buffers |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 116 | * |
Coly Li | 73ac36e | 2009-01-07 18:09:16 -0800 | [diff] [blame] | 117 | * Returns the number of successfully extracted equal buffer states. |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 118 | * Stops processing if a state is different from the last buffers state. |
| 119 | */ |
| 120 | static int qdio_do_eqbs(struct qdio_q *q, unsigned char *state, |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 121 | int start, int count, int auto_ack) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 122 | { |
| 123 | unsigned int ccq = 0; |
| 124 | int tmp_count = count, tmp_start = start; |
| 125 | int nr = q->nr; |
| 126 | int rc; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 127 | |
| 128 | BUG_ON(!q->irq_ptr->sch_token); |
Jan Glauber | 23589d0 | 2008-12-25 13:38:44 +0100 | [diff] [blame] | 129 | qdio_perf_stat_inc(&perf_stats.debug_eqbs_all); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 130 | |
| 131 | if (!q->is_input_q) |
| 132 | nr += q->irq_ptr->nr_input_qs; |
| 133 | again: |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 134 | ccq = do_eqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count, |
| 135 | auto_ack); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 136 | rc = qdio_check_ccq(q, ccq); |
| 137 | |
| 138 | /* At least one buffer was processed, return and extract the remaining |
| 139 | * buffers later. |
| 140 | */ |
Jan Glauber | 23589d0 | 2008-12-25 13:38:44 +0100 | [diff] [blame] | 141 | if ((ccq == 96) && (count != tmp_count)) { |
| 142 | qdio_perf_stat_inc(&perf_stats.debug_eqbs_incomplete); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 143 | return (count - tmp_count); |
Jan Glauber | 23589d0 | 2008-12-25 13:38:44 +0100 | [diff] [blame] | 144 | } |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 145 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 146 | if (rc == 1) { |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 147 | DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "EQBS again:%2d", ccq); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 148 | goto again; |
| 149 | } |
| 150 | |
| 151 | if (rc < 0) { |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 152 | DBF_ERROR("%4x EQBS ERROR", SCH_NO(q)); |
| 153 | DBF_ERROR("%3d%3d%2d", count, tmp_count, nr); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 154 | q->handler(q->irq_ptr->cdev, |
| 155 | QDIO_ERROR_ACTIVATE_CHECK_CONDITION, |
| 156 | 0, -1, -1, q->irq_ptr->int_parm); |
| 157 | return 0; |
| 158 | } |
| 159 | return count - tmp_count; |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * qdio_do_sqbs - set buffer states for QEBSM |
| 164 | * @q: queue to manipulate |
| 165 | * @state: new state of the buffers |
| 166 | * @start: first buffer number to change |
| 167 | * @count: how many buffers to change |
| 168 | * |
| 169 | * Returns the number of successfully changed buffers. |
| 170 | * Does retrying until the specified count of buffer states is set or an |
| 171 | * error occurs. |
| 172 | */ |
| 173 | static int qdio_do_sqbs(struct qdio_q *q, unsigned char state, int start, |
| 174 | int count) |
| 175 | { |
| 176 | unsigned int ccq = 0; |
| 177 | int tmp_count = count, tmp_start = start; |
| 178 | int nr = q->nr; |
| 179 | int rc; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 180 | |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 181 | if (!count) |
| 182 | return 0; |
| 183 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 184 | BUG_ON(!q->irq_ptr->sch_token); |
Jan Glauber | 23589d0 | 2008-12-25 13:38:44 +0100 | [diff] [blame] | 185 | qdio_perf_stat_inc(&perf_stats.debug_sqbs_all); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 186 | |
| 187 | if (!q->is_input_q) |
| 188 | nr += q->irq_ptr->nr_input_qs; |
| 189 | again: |
| 190 | ccq = do_sqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count); |
| 191 | rc = qdio_check_ccq(q, ccq); |
| 192 | if (rc == 1) { |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 193 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "SQBS again:%2d", ccq); |
Jan Glauber | 23589d0 | 2008-12-25 13:38:44 +0100 | [diff] [blame] | 194 | qdio_perf_stat_inc(&perf_stats.debug_sqbs_incomplete); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 195 | goto again; |
| 196 | } |
| 197 | if (rc < 0) { |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 198 | DBF_ERROR("%4x SQBS ERROR", SCH_NO(q)); |
| 199 | DBF_ERROR("%3d%3d%2d", count, tmp_count, nr); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 200 | q->handler(q->irq_ptr->cdev, |
| 201 | QDIO_ERROR_ACTIVATE_CHECK_CONDITION, |
| 202 | 0, -1, -1, q->irq_ptr->int_parm); |
| 203 | return 0; |
| 204 | } |
| 205 | WARN_ON(tmp_count); |
| 206 | return count - tmp_count; |
| 207 | } |
| 208 | |
| 209 | /* returns number of examined buffers and their common state in *state */ |
| 210 | static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr, |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 211 | unsigned char *state, unsigned int count, |
| 212 | int auto_ack) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 213 | { |
| 214 | unsigned char __state = 0; |
| 215 | int i; |
| 216 | |
| 217 | BUG_ON(bufnr > QDIO_MAX_BUFFERS_MASK); |
| 218 | BUG_ON(count > QDIO_MAX_BUFFERS_PER_Q); |
| 219 | |
| 220 | if (is_qebsm(q)) |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 221 | return qdio_do_eqbs(q, state, bufnr, count, auto_ack); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 222 | |
| 223 | for (i = 0; i < count; i++) { |
| 224 | if (!__state) |
| 225 | __state = q->slsb.val[bufnr]; |
| 226 | else if (q->slsb.val[bufnr] != __state) |
| 227 | break; |
| 228 | bufnr = next_buf(bufnr); |
| 229 | } |
| 230 | *state = __state; |
| 231 | return i; |
| 232 | } |
| 233 | |
Jan Glauber | 60b5df2 | 2009-06-22 12:08:10 +0200 | [diff] [blame] | 234 | static inline int get_buf_state(struct qdio_q *q, unsigned int bufnr, |
| 235 | unsigned char *state, int auto_ack) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 236 | { |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 237 | return get_buf_states(q, bufnr, state, 1, auto_ack); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | /* wrap-around safe setting of slsb states, returns number of changed buffers */ |
| 241 | static inline int set_buf_states(struct qdio_q *q, int bufnr, |
| 242 | unsigned char state, int count) |
| 243 | { |
| 244 | int i; |
| 245 | |
| 246 | BUG_ON(bufnr > QDIO_MAX_BUFFERS_MASK); |
| 247 | BUG_ON(count > QDIO_MAX_BUFFERS_PER_Q); |
| 248 | |
| 249 | if (is_qebsm(q)) |
| 250 | return qdio_do_sqbs(q, state, bufnr, count); |
| 251 | |
| 252 | for (i = 0; i < count; i++) { |
| 253 | xchg(&q->slsb.val[bufnr], state); |
| 254 | bufnr = next_buf(bufnr); |
| 255 | } |
| 256 | return count; |
| 257 | } |
| 258 | |
| 259 | static inline int set_buf_state(struct qdio_q *q, int bufnr, |
| 260 | unsigned char state) |
| 261 | { |
| 262 | return set_buf_states(q, bufnr, state, 1); |
| 263 | } |
| 264 | |
| 265 | /* set slsb states to initial state */ |
| 266 | void qdio_init_buf_states(struct qdio_irq *irq_ptr) |
| 267 | { |
| 268 | struct qdio_q *q; |
| 269 | int i; |
| 270 | |
| 271 | for_each_input_queue(irq_ptr, q, i) |
| 272 | set_buf_states(q, 0, SLSB_P_INPUT_NOT_INIT, |
| 273 | QDIO_MAX_BUFFERS_PER_Q); |
| 274 | for_each_output_queue(irq_ptr, q, i) |
| 275 | set_buf_states(q, 0, SLSB_P_OUTPUT_NOT_INIT, |
| 276 | QDIO_MAX_BUFFERS_PER_Q); |
| 277 | } |
| 278 | |
Jan Glauber | 60b5df2 | 2009-06-22 12:08:10 +0200 | [diff] [blame] | 279 | static inline int qdio_siga_sync(struct qdio_q *q, unsigned int output, |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 280 | unsigned int input) |
| 281 | { |
| 282 | int cc; |
| 283 | |
| 284 | if (!need_siga_sync(q)) |
| 285 | return 0; |
| 286 | |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 287 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-s:%1d", q->nr); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 288 | qdio_perf_stat_inc(&perf_stats.siga_sync); |
| 289 | |
| 290 | cc = do_siga_sync(q->irq_ptr->schid, output, input); |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 291 | if (cc) |
| 292 | DBF_ERROR("%4x SIGA-S:%2d", SCH_NO(q), cc); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 293 | return cc; |
| 294 | } |
| 295 | |
Jan Glauber | 60b5df2 | 2009-06-22 12:08:10 +0200 | [diff] [blame] | 296 | static inline int qdio_siga_sync_q(struct qdio_q *q) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 297 | { |
| 298 | if (q->is_input_q) |
| 299 | return qdio_siga_sync(q, 0, q->mask); |
| 300 | else |
| 301 | return qdio_siga_sync(q, q->mask, 0); |
| 302 | } |
| 303 | |
| 304 | static inline int qdio_siga_sync_out(struct qdio_q *q) |
| 305 | { |
| 306 | return qdio_siga_sync(q, ~0U, 0); |
| 307 | } |
| 308 | |
| 309 | static inline int qdio_siga_sync_all(struct qdio_q *q) |
| 310 | { |
| 311 | return qdio_siga_sync(q, ~0U, ~0U); |
| 312 | } |
| 313 | |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 314 | static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 315 | { |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 316 | unsigned long schid; |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 317 | unsigned int fc = 0; |
| 318 | u64 start_time = 0; |
| 319 | int cc; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 320 | |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 321 | if (q->u.out.use_enh_siga) |
Klaus-Dieter Wacker | 7a0f475 | 2008-10-10 21:33:18 +0200 | [diff] [blame] | 322 | fc = 3; |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 323 | |
| 324 | if (is_qebsm(q)) { |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 325 | schid = q->irq_ptr->sch_token; |
| 326 | fc |= 0x80; |
| 327 | } |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 328 | else |
| 329 | schid = *((u32 *)&q->irq_ptr->schid); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 330 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 331 | again: |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 332 | cc = do_siga_output(schid, q->mask, busy_bit, fc); |
Jan Glauber | 58eb27c | 2008-08-21 19:46:34 +0200 | [diff] [blame] | 333 | |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 334 | /* hipersocket busy condition */ |
| 335 | if (*busy_bit) { |
| 336 | WARN_ON(queue_type(q) != QDIO_IQDIO_QFMT || cc != 2); |
| 337 | |
| 338 | if (!start_time) { |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 339 | start_time = get_usecs(); |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 340 | goto again; |
| 341 | } |
| 342 | if ((get_usecs() - start_time) < QDIO_BUSY_BIT_PATIENCE) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 343 | goto again; |
| 344 | } |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 345 | return cc; |
| 346 | } |
| 347 | |
| 348 | static inline int qdio_siga_input(struct qdio_q *q) |
| 349 | { |
| 350 | int cc; |
| 351 | |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 352 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-r:%1d", q->nr); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 353 | qdio_perf_stat_inc(&perf_stats.siga_in); |
| 354 | |
| 355 | cc = do_siga_input(q->irq_ptr->schid, q->mask); |
| 356 | if (cc) |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 357 | DBF_ERROR("%4x SIGA-R:%2d", SCH_NO(q), cc); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 358 | return cc; |
| 359 | } |
| 360 | |
Jan Glauber | 60b5df2 | 2009-06-22 12:08:10 +0200 | [diff] [blame] | 361 | static inline void qdio_sync_after_thinint(struct qdio_q *q) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 362 | { |
| 363 | if (pci_out_supported(q)) { |
| 364 | if (need_siga_sync_thinint(q)) |
| 365 | qdio_siga_sync_all(q); |
| 366 | else if (need_siga_sync_out_thinint(q)) |
| 367 | qdio_siga_sync_out(q); |
| 368 | } else |
| 369 | qdio_siga_sync_q(q); |
| 370 | } |
| 371 | |
Jan Glauber | 60b5df2 | 2009-06-22 12:08:10 +0200 | [diff] [blame] | 372 | int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr, |
| 373 | unsigned char *state) |
| 374 | { |
| 375 | qdio_siga_sync_q(q); |
| 376 | return get_buf_states(q, bufnr, state, 1, 0); |
| 377 | } |
| 378 | |
| 379 | static inline void qdio_stop_polling(struct qdio_q *q) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 380 | { |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 381 | if (!q->u.in.polling) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 382 | return; |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 383 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 384 | q->u.in.polling = 0; |
| 385 | qdio_perf_stat_inc(&perf_stats.debug_stop_polling); |
| 386 | |
| 387 | /* show the card that we are not polling anymore */ |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 388 | if (is_qebsm(q)) { |
Jan Glauber | e85dea0 | 2009-03-26 15:24:29 +0100 | [diff] [blame] | 389 | set_buf_states(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT, |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 390 | q->u.in.ack_count); |
| 391 | q->u.in.ack_count = 0; |
| 392 | } else |
Jan Glauber | e85dea0 | 2009-03-26 15:24:29 +0100 | [diff] [blame] | 393 | set_buf_state(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 394 | } |
| 395 | |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 396 | static void announce_buffer_error(struct qdio_q *q, int count) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 397 | { |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 398 | q->qdio_error |= QDIO_ERROR_SLSB_STATE; |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 399 | |
| 400 | /* special handling for no target buffer empty */ |
| 401 | if ((!q->is_input_q && |
| 402 | (q->sbal[q->first_to_check]->element[15].flags & 0xff) == 0x10)) { |
| 403 | qdio_perf_stat_inc(&perf_stats.outbound_target_full); |
| 404 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "OUTFULL FTC:%3d", |
| 405 | q->first_to_check); |
| 406 | return; |
| 407 | } |
| 408 | |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 409 | DBF_ERROR("%4x BUF ERROR", SCH_NO(q)); |
| 410 | DBF_ERROR((q->is_input_q) ? "IN:%2d" : "OUT:%2d", q->nr); |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 411 | DBF_ERROR("FTC:%3d C:%3d", q->first_to_check, count); |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 412 | DBF_ERROR("F14:%2x F15:%2x", |
| 413 | q->sbal[q->first_to_check]->element[14].flags & 0xff, |
| 414 | q->sbal[q->first_to_check]->element[15].flags & 0xff); |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 415 | } |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 416 | |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 417 | static inline void inbound_primed(struct qdio_q *q, int count) |
| 418 | { |
| 419 | int new; |
| 420 | |
| 421 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in prim: %3d", count); |
| 422 | |
| 423 | /* for QEBSM the ACK was already set by EQBS */ |
| 424 | if (is_qebsm(q)) { |
| 425 | if (!q->u.in.polling) { |
| 426 | q->u.in.polling = 1; |
| 427 | q->u.in.ack_count = count; |
Jan Glauber | e85dea0 | 2009-03-26 15:24:29 +0100 | [diff] [blame] | 428 | q->u.in.ack_start = q->first_to_check; |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 429 | return; |
| 430 | } |
| 431 | |
| 432 | /* delete the previous ACK's */ |
Jan Glauber | e85dea0 | 2009-03-26 15:24:29 +0100 | [diff] [blame] | 433 | set_buf_states(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT, |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 434 | q->u.in.ack_count); |
| 435 | q->u.in.ack_count = count; |
Jan Glauber | e85dea0 | 2009-03-26 15:24:29 +0100 | [diff] [blame] | 436 | q->u.in.ack_start = q->first_to_check; |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 437 | return; |
| 438 | } |
| 439 | |
| 440 | /* |
| 441 | * ACK the newest buffer. The ACK will be removed in qdio_stop_polling |
| 442 | * or by the next inbound run. |
| 443 | */ |
| 444 | new = add_buf(q->first_to_check, count - 1); |
| 445 | if (q->u.in.polling) { |
| 446 | /* reset the previous ACK but first set the new one */ |
| 447 | set_buf_state(q, new, SLSB_P_INPUT_ACK); |
Jan Glauber | e85dea0 | 2009-03-26 15:24:29 +0100 | [diff] [blame] | 448 | set_buf_state(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT); |
Jan Glauber | 3fdf1e1 | 2009-03-26 15:24:28 +0100 | [diff] [blame] | 449 | } else { |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 450 | q->u.in.polling = 1; |
Jan Glauber | 3fdf1e1 | 2009-03-26 15:24:28 +0100 | [diff] [blame] | 451 | set_buf_state(q, new, SLSB_P_INPUT_ACK); |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 452 | } |
| 453 | |
Jan Glauber | e85dea0 | 2009-03-26 15:24:29 +0100 | [diff] [blame] | 454 | q->u.in.ack_start = new; |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 455 | count--; |
| 456 | if (!count) |
| 457 | return; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | static int get_inbound_buffer_frontier(struct qdio_q *q) |
| 461 | { |
| 462 | int count, stop; |
| 463 | unsigned char state; |
| 464 | |
| 465 | /* |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 466 | * Don't check 128 buffers, as otherwise qdio_inbound_q_moved |
| 467 | * would return 0. |
| 468 | */ |
| 469 | count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK); |
| 470 | stop = add_buf(q->first_to_check, count); |
| 471 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 472 | if (q->first_to_check == stop) |
| 473 | goto out; |
| 474 | |
Jan Glauber | 36e3e72 | 2009-06-22 12:08:12 +0200 | [diff] [blame] | 475 | /* |
| 476 | * No siga sync here, as a PCI or we after a thin interrupt |
| 477 | * already sync'ed the queues. |
| 478 | */ |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 479 | count = get_buf_states(q, q->first_to_check, &state, count, 1); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 480 | if (!count) |
| 481 | goto out; |
| 482 | |
| 483 | switch (state) { |
| 484 | case SLSB_P_INPUT_PRIMED: |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 485 | inbound_primed(q, count); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 486 | q->first_to_check = add_buf(q->first_to_check, count); |
| 487 | atomic_sub(count, &q->nr_buf_used); |
Jan Glauber | 36e3e72 | 2009-06-22 12:08:12 +0200 | [diff] [blame] | 488 | break; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 489 | case SLSB_P_INPUT_ERROR: |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 490 | announce_buffer_error(q, count); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 491 | /* process the buffer, the upper layer will take care of it */ |
| 492 | q->first_to_check = add_buf(q->first_to_check, count); |
| 493 | atomic_sub(count, &q->nr_buf_used); |
| 494 | break; |
| 495 | case SLSB_CU_INPUT_EMPTY: |
| 496 | case SLSB_P_INPUT_NOT_INIT: |
| 497 | case SLSB_P_INPUT_ACK: |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 498 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in nop"); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 499 | break; |
| 500 | default: |
| 501 | BUG(); |
| 502 | } |
| 503 | out: |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 504 | return q->first_to_check; |
| 505 | } |
| 506 | |
Jan Glauber | 60b5df2 | 2009-06-22 12:08:10 +0200 | [diff] [blame] | 507 | static int qdio_inbound_q_moved(struct qdio_q *q) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 508 | { |
| 509 | int bufnr; |
| 510 | |
| 511 | bufnr = get_inbound_buffer_frontier(q); |
| 512 | |
Jan Glauber | e85dea0 | 2009-03-26 15:24:29 +0100 | [diff] [blame] | 513 | if ((bufnr != q->last_move) || q->qdio_error) { |
| 514 | q->last_move = bufnr; |
Jan Glauber | 9a2c160 | 2009-06-22 12:08:11 +0200 | [diff] [blame] | 515 | if (!is_thinint_irq(q->irq_ptr) && !MACHINE_IS_VM) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 516 | q->u.in.timestamp = get_usecs(); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 517 | return 1; |
| 518 | } else |
| 519 | return 0; |
| 520 | } |
| 521 | |
Jan Glauber | 9a2c160 | 2009-06-22 12:08:11 +0200 | [diff] [blame] | 522 | static inline int qdio_inbound_q_done(struct qdio_q *q) |
Jan Glauber | 60b5df2 | 2009-06-22 12:08:10 +0200 | [diff] [blame] | 523 | { |
| 524 | unsigned char state = 0; |
| 525 | |
| 526 | if (!atomic_read(&q->nr_buf_used)) |
| 527 | return 1; |
| 528 | |
| 529 | qdio_siga_sync_q(q); |
| 530 | get_buf_state(q, q->first_to_check, &state, 0); |
| 531 | |
| 532 | if (state == SLSB_P_INPUT_PRIMED) |
| 533 | /* more work coming */ |
| 534 | return 0; |
Jan Glauber | 9a2c160 | 2009-06-22 12:08:11 +0200 | [diff] [blame] | 535 | |
| 536 | if (is_thinint_irq(q->irq_ptr)) |
| 537 | return 1; |
| 538 | |
| 539 | /* don't poll under z/VM */ |
| 540 | if (MACHINE_IS_VM) |
| 541 | return 1; |
| 542 | |
| 543 | /* |
| 544 | * At this point we know, that inbound first_to_check |
| 545 | * has (probably) not moved (see qdio_inbound_processing). |
| 546 | */ |
| 547 | if (get_usecs() > q->u.in.timestamp + QDIO_INPUT_THRESHOLD) { |
| 548 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in done:%3d", |
| 549 | q->first_to_check); |
| 550 | return 1; |
| 551 | } else |
| 552 | return 0; |
Jan Glauber | 60b5df2 | 2009-06-22 12:08:10 +0200 | [diff] [blame] | 553 | } |
| 554 | |
| 555 | static void qdio_kick_handler(struct qdio_q *q) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 556 | { |
Jan Glauber | 9c8a08d | 2009-03-26 15:24:32 +0100 | [diff] [blame] | 557 | int start = q->first_to_kick; |
| 558 | int end = q->first_to_check; |
| 559 | int count; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 560 | |
| 561 | if (unlikely(q->irq_ptr->state != QDIO_IRQ_STATE_ACTIVE)) |
| 562 | return; |
| 563 | |
Jan Glauber | 9c8a08d | 2009-03-26 15:24:32 +0100 | [diff] [blame] | 564 | count = sub_buf(end, start); |
| 565 | |
| 566 | if (q->is_input_q) { |
| 567 | qdio_perf_stat_inc(&perf_stats.inbound_handler); |
| 568 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "kih s:%3d c:%3d", start, count); |
| 569 | } else { |
| 570 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "koh: nr:%1d", q->nr); |
| 571 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "s:%3d c:%3d", start, count); |
| 572 | } |
| 573 | |
| 574 | q->handler(q->irq_ptr->cdev, q->qdio_error, q->nr, start, count, |
| 575 | q->irq_ptr->int_parm); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 576 | |
| 577 | /* for the next time */ |
Jan Glauber | 9c8a08d | 2009-03-26 15:24:32 +0100 | [diff] [blame] | 578 | q->first_to_kick = end; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 579 | q->qdio_error = 0; |
| 580 | } |
| 581 | |
| 582 | static void __qdio_inbound_processing(struct qdio_q *q) |
| 583 | { |
| 584 | qdio_perf_stat_inc(&perf_stats.tasklet_inbound); |
| 585 | again: |
| 586 | if (!qdio_inbound_q_moved(q)) |
| 587 | return; |
| 588 | |
Jan Glauber | 9c8a08d | 2009-03-26 15:24:32 +0100 | [diff] [blame] | 589 | qdio_kick_handler(q); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 590 | |
| 591 | if (!qdio_inbound_q_done(q)) |
| 592 | /* means poll time is not yet over */ |
| 593 | goto again; |
| 594 | |
| 595 | qdio_stop_polling(q); |
| 596 | /* |
| 597 | * We need to check again to not lose initiative after |
| 598 | * resetting the ACK state. |
| 599 | */ |
| 600 | if (!qdio_inbound_q_done(q)) |
| 601 | goto again; |
| 602 | } |
| 603 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 604 | void qdio_inbound_processing(unsigned long data) |
| 605 | { |
| 606 | struct qdio_q *q = (struct qdio_q *)data; |
| 607 | __qdio_inbound_processing(q); |
| 608 | } |
| 609 | |
| 610 | static int get_outbound_buffer_frontier(struct qdio_q *q) |
| 611 | { |
| 612 | int count, stop; |
| 613 | unsigned char state; |
| 614 | |
| 615 | if (((queue_type(q) != QDIO_IQDIO_QFMT) && !pci_out_supported(q)) || |
| 616 | (queue_type(q) == QDIO_IQDIO_QFMT && multicast_outbound(q))) |
| 617 | qdio_siga_sync_q(q); |
| 618 | |
| 619 | /* |
| 620 | * Don't check 128 buffers, as otherwise qdio_inbound_q_moved |
| 621 | * would return 0. |
| 622 | */ |
| 623 | count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK); |
| 624 | stop = add_buf(q->first_to_check, count); |
| 625 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 626 | if (q->first_to_check == stop) |
| 627 | return q->first_to_check; |
| 628 | |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 629 | count = get_buf_states(q, q->first_to_check, &state, count, 0); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 630 | if (!count) |
| 631 | return q->first_to_check; |
| 632 | |
| 633 | switch (state) { |
| 634 | case SLSB_P_OUTPUT_EMPTY: |
| 635 | /* the adapter got it */ |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 636 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out empty:%1d %3d", q->nr, count); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 637 | |
| 638 | atomic_sub(count, &q->nr_buf_used); |
| 639 | q->first_to_check = add_buf(q->first_to_check, count); |
Jan Glauber | 36e3e72 | 2009-06-22 12:08:12 +0200 | [diff] [blame] | 640 | break; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 641 | case SLSB_P_OUTPUT_ERROR: |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 642 | announce_buffer_error(q, count); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 643 | /* process the buffer, the upper layer will take care of it */ |
| 644 | q->first_to_check = add_buf(q->first_to_check, count); |
| 645 | atomic_sub(count, &q->nr_buf_used); |
| 646 | break; |
| 647 | case SLSB_CU_OUTPUT_PRIMED: |
| 648 | /* the adapter has not fetched the output yet */ |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 649 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out primed:%1d", q->nr); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 650 | break; |
| 651 | case SLSB_P_OUTPUT_NOT_INIT: |
| 652 | case SLSB_P_OUTPUT_HALTED: |
| 653 | break; |
| 654 | default: |
| 655 | BUG(); |
| 656 | } |
| 657 | return q->first_to_check; |
| 658 | } |
| 659 | |
| 660 | /* all buffers processed? */ |
| 661 | static inline int qdio_outbound_q_done(struct qdio_q *q) |
| 662 | { |
| 663 | return atomic_read(&q->nr_buf_used) == 0; |
| 664 | } |
| 665 | |
| 666 | static inline int qdio_outbound_q_moved(struct qdio_q *q) |
| 667 | { |
| 668 | int bufnr; |
| 669 | |
| 670 | bufnr = get_outbound_buffer_frontier(q); |
| 671 | |
Jan Glauber | e85dea0 | 2009-03-26 15:24:29 +0100 | [diff] [blame] | 672 | if ((bufnr != q->last_move) || q->qdio_error) { |
| 673 | q->last_move = bufnr; |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 674 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out moved:%1d", q->nr); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 675 | return 1; |
| 676 | } else |
| 677 | return 0; |
| 678 | } |
| 679 | |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 680 | static int qdio_kick_outbound_q(struct qdio_q *q) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 681 | { |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 682 | unsigned int busy_bit; |
| 683 | int cc; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 684 | |
| 685 | if (!need_siga_out(q)) |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 686 | return 0; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 687 | |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 688 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-w:%1d", q->nr); |
| 689 | qdio_perf_stat_inc(&perf_stats.siga_out); |
| 690 | |
| 691 | cc = qdio_siga_output(q, &busy_bit); |
| 692 | switch (cc) { |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 693 | case 0: |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 694 | break; |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 695 | case 2: |
| 696 | if (busy_bit) { |
| 697 | DBF_ERROR("%4x cc2 REP:%1d", SCH_NO(q), q->nr); |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 698 | cc |= QDIO_ERROR_SIGA_BUSY; |
| 699 | } else |
| 700 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-w cc2:%1d", q->nr); |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 701 | break; |
| 702 | case 1: |
| 703 | case 3: |
| 704 | DBF_ERROR("%4x SIGA-W:%1d", SCH_NO(q), cc); |
Jan Glauber | 7a0b4cb | 2008-12-25 13:38:48 +0100 | [diff] [blame] | 705 | break; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 706 | } |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 707 | return cc; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 708 | } |
| 709 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 710 | static void __qdio_outbound_processing(struct qdio_q *q) |
| 711 | { |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 712 | qdio_perf_stat_inc(&perf_stats.tasklet_outbound); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 713 | BUG_ON(atomic_read(&q->nr_buf_used) < 0); |
| 714 | |
| 715 | if (qdio_outbound_q_moved(q)) |
Jan Glauber | 9c8a08d | 2009-03-26 15:24:32 +0100 | [diff] [blame] | 716 | qdio_kick_handler(q); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 717 | |
Jan Glauber | c38f960 | 2009-03-26 15:24:26 +0100 | [diff] [blame] | 718 | if (queue_type(q) == QDIO_ZFCP_QFMT) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 719 | if (!pci_out_supported(q) && !qdio_outbound_q_done(q)) |
Jan Glauber | c38f960 | 2009-03-26 15:24:26 +0100 | [diff] [blame] | 720 | goto sched; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 721 | |
| 722 | /* bail out for HiperSockets unicast queues */ |
| 723 | if (queue_type(q) == QDIO_IQDIO_QFMT && !multicast_outbound(q)) |
| 724 | return; |
| 725 | |
Ursula Braun | 4bcb3a3 | 2008-10-10 21:33:04 +0200 | [diff] [blame] | 726 | if ((queue_type(q) == QDIO_IQDIO_QFMT) && |
Jan Glauber | c38f960 | 2009-03-26 15:24:26 +0100 | [diff] [blame] | 727 | (atomic_read(&q->nr_buf_used)) > QDIO_IQDIO_POLL_LVL) |
| 728 | goto sched; |
Ursula Braun | 4bcb3a3 | 2008-10-10 21:33:04 +0200 | [diff] [blame] | 729 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 730 | if (q->u.out.pci_out_enabled) |
| 731 | return; |
| 732 | |
| 733 | /* |
| 734 | * Now we know that queue type is either qeth without pci enabled |
| 735 | * or HiperSockets multicast. Make sure buffer switch from PRIMED to |
| 736 | * EMPTY is noticed and outbound_handler is called after some time. |
| 737 | */ |
| 738 | if (qdio_outbound_q_done(q)) |
| 739 | del_timer(&q->u.out.timer); |
| 740 | else { |
| 741 | if (!timer_pending(&q->u.out.timer)) { |
| 742 | mod_timer(&q->u.out.timer, jiffies + 10 * HZ); |
| 743 | qdio_perf_stat_inc(&perf_stats.debug_tl_out_timer); |
| 744 | } |
| 745 | } |
Jan Glauber | c38f960 | 2009-03-26 15:24:26 +0100 | [diff] [blame] | 746 | return; |
| 747 | |
| 748 | sched: |
| 749 | if (unlikely(q->irq_ptr->state == QDIO_IRQ_STATE_STOPPED)) |
| 750 | return; |
| 751 | tasklet_schedule(&q->tasklet); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 752 | } |
| 753 | |
| 754 | /* outbound tasklet */ |
| 755 | void qdio_outbound_processing(unsigned long data) |
| 756 | { |
| 757 | struct qdio_q *q = (struct qdio_q *)data; |
| 758 | __qdio_outbound_processing(q); |
| 759 | } |
| 760 | |
| 761 | void qdio_outbound_timer(unsigned long data) |
| 762 | { |
| 763 | struct qdio_q *q = (struct qdio_q *)data; |
Jan Glauber | c38f960 | 2009-03-26 15:24:26 +0100 | [diff] [blame] | 764 | |
| 765 | if (unlikely(q->irq_ptr->state == QDIO_IRQ_STATE_STOPPED)) |
| 766 | return; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 767 | tasklet_schedule(&q->tasklet); |
| 768 | } |
| 769 | |
Jan Glauber | 60b5df2 | 2009-06-22 12:08:10 +0200 | [diff] [blame] | 770 | static inline void qdio_check_outbound_after_thinint(struct qdio_q *q) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 771 | { |
| 772 | struct qdio_q *out; |
| 773 | int i; |
| 774 | |
| 775 | if (!pci_out_supported(q)) |
| 776 | return; |
| 777 | |
| 778 | for_each_output_queue(q->irq_ptr, out, i) |
| 779 | if (!qdio_outbound_q_done(out)) |
| 780 | tasklet_schedule(&out->tasklet); |
| 781 | } |
| 782 | |
Jan Glauber | 60b5df2 | 2009-06-22 12:08:10 +0200 | [diff] [blame] | 783 | static void __tiqdio_inbound_processing(struct qdio_q *q) |
| 784 | { |
| 785 | qdio_perf_stat_inc(&perf_stats.thinint_inbound); |
| 786 | qdio_sync_after_thinint(q); |
| 787 | |
| 788 | /* |
| 789 | * The interrupt could be caused by a PCI request. Check the |
| 790 | * PCI capable outbound queues. |
| 791 | */ |
| 792 | qdio_check_outbound_after_thinint(q); |
| 793 | |
| 794 | if (!qdio_inbound_q_moved(q)) |
| 795 | return; |
| 796 | |
| 797 | qdio_kick_handler(q); |
| 798 | |
Jan Glauber | 9a2c160 | 2009-06-22 12:08:11 +0200 | [diff] [blame] | 799 | if (!qdio_inbound_q_done(q)) { |
Jan Glauber | 60b5df2 | 2009-06-22 12:08:10 +0200 | [diff] [blame] | 800 | qdio_perf_stat_inc(&perf_stats.thinint_inbound_loop); |
| 801 | if (likely(q->irq_ptr->state != QDIO_IRQ_STATE_STOPPED)) |
| 802 | tasklet_schedule(&q->tasklet); |
| 803 | } |
| 804 | |
| 805 | qdio_stop_polling(q); |
| 806 | /* |
| 807 | * We need to check again to not lose initiative after |
| 808 | * resetting the ACK state. |
| 809 | */ |
Jan Glauber | 9a2c160 | 2009-06-22 12:08:11 +0200 | [diff] [blame] | 810 | if (!qdio_inbound_q_done(q)) { |
Jan Glauber | 60b5df2 | 2009-06-22 12:08:10 +0200 | [diff] [blame] | 811 | qdio_perf_stat_inc(&perf_stats.thinint_inbound_loop2); |
| 812 | if (likely(q->irq_ptr->state != QDIO_IRQ_STATE_STOPPED)) |
| 813 | tasklet_schedule(&q->tasklet); |
| 814 | } |
| 815 | } |
| 816 | |
| 817 | void tiqdio_inbound_processing(unsigned long data) |
| 818 | { |
| 819 | struct qdio_q *q = (struct qdio_q *)data; |
| 820 | __tiqdio_inbound_processing(q); |
| 821 | } |
| 822 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 823 | static inline void qdio_set_state(struct qdio_irq *irq_ptr, |
| 824 | enum qdio_irq_states state) |
| 825 | { |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 826 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, "newstate: %1d", state); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 827 | |
| 828 | irq_ptr->state = state; |
| 829 | mb(); |
| 830 | } |
| 831 | |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 832 | static void qdio_irq_check_sense(struct qdio_irq *irq_ptr, struct irb *irb) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 833 | { |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 834 | if (irb->esw.esw0.erw.cons) { |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 835 | DBF_ERROR("%4x sense:", irq_ptr->schid.sch_no); |
| 836 | DBF_ERROR_HEX(irb, 64); |
| 837 | DBF_ERROR_HEX(irb->ecw, 64); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 838 | } |
| 839 | } |
| 840 | |
| 841 | /* PCI interrupt handler */ |
| 842 | static void qdio_int_handler_pci(struct qdio_irq *irq_ptr) |
| 843 | { |
| 844 | int i; |
| 845 | struct qdio_q *q; |
| 846 | |
Jan Glauber | c38f960 | 2009-03-26 15:24:26 +0100 | [diff] [blame] | 847 | if (unlikely(irq_ptr->state == QDIO_IRQ_STATE_STOPPED)) |
| 848 | return; |
| 849 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 850 | qdio_perf_stat_inc(&perf_stats.pci_int); |
| 851 | |
| 852 | for_each_input_queue(irq_ptr, q, i) |
| 853 | tasklet_schedule(&q->tasklet); |
| 854 | |
| 855 | if (!(irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)) |
| 856 | return; |
| 857 | |
| 858 | for_each_output_queue(irq_ptr, q, i) { |
| 859 | if (qdio_outbound_q_done(q)) |
| 860 | continue; |
| 861 | |
| 862 | if (!siga_syncs_out_pci(q)) |
| 863 | qdio_siga_sync_q(q); |
| 864 | |
| 865 | tasklet_schedule(&q->tasklet); |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | static void qdio_handle_activate_check(struct ccw_device *cdev, |
| 870 | unsigned long intparm, int cstat, int dstat) |
| 871 | { |
| 872 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; |
| 873 | struct qdio_q *q; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 874 | |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 875 | DBF_ERROR("%4x ACT CHECK", irq_ptr->schid.sch_no); |
| 876 | DBF_ERROR("intp :%lx", intparm); |
| 877 | DBF_ERROR("ds: %2x cs:%2x", dstat, cstat); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 878 | |
| 879 | if (irq_ptr->nr_input_qs) { |
| 880 | q = irq_ptr->input_qs[0]; |
| 881 | } else if (irq_ptr->nr_output_qs) { |
| 882 | q = irq_ptr->output_qs[0]; |
| 883 | } else { |
| 884 | dump_stack(); |
| 885 | goto no_handler; |
| 886 | } |
| 887 | q->handler(q->irq_ptr->cdev, QDIO_ERROR_ACTIVATE_CHECK_CONDITION, |
| 888 | 0, -1, -1, irq_ptr->int_parm); |
| 889 | no_handler: |
| 890 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED); |
| 891 | } |
| 892 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 893 | static void qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, |
| 894 | int dstat) |
| 895 | { |
| 896 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 897 | |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 898 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, "qest irq"); |
Jan Glauber | 4c57542 | 2009-06-12 10:26:28 +0200 | [diff] [blame] | 899 | |
| 900 | if (cstat) |
| 901 | goto error; |
| 902 | if (dstat & ~(DEV_STAT_DEV_END | DEV_STAT_CHN_END)) |
| 903 | goto error; |
| 904 | if (!(dstat & DEV_STAT_DEV_END)) |
| 905 | goto error; |
| 906 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ESTABLISHED); |
| 907 | return; |
| 908 | |
| 909 | error: |
| 910 | DBF_ERROR("%4x EQ:error", irq_ptr->schid.sch_no); |
| 911 | DBF_ERROR("ds: %2x cs:%2x", dstat, cstat); |
| 912 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 913 | } |
| 914 | |
| 915 | /* qdio interrupt handler */ |
| 916 | void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm, |
| 917 | struct irb *irb) |
| 918 | { |
| 919 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; |
| 920 | int cstat, dstat; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 921 | |
| 922 | qdio_perf_stat_inc(&perf_stats.qdio_int); |
| 923 | |
| 924 | if (!intparm || !irq_ptr) { |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 925 | DBF_ERROR("qint:%4x", cdev->private->schid.sch_no); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 926 | return; |
| 927 | } |
| 928 | |
| 929 | if (IS_ERR(irb)) { |
| 930 | switch (PTR_ERR(irb)) { |
| 931 | case -EIO: |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 932 | DBF_ERROR("%4x IO error", irq_ptr->schid.sch_no); |
Jan Glauber | 75cb71f | 2009-04-14 15:36:22 +0200 | [diff] [blame] | 933 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR); |
| 934 | wake_up(&cdev->private->wait_q); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 935 | return; |
| 936 | default: |
| 937 | WARN_ON(1); |
| 938 | return; |
| 939 | } |
| 940 | } |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 941 | qdio_irq_check_sense(irq_ptr, irb); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 942 | cstat = irb->scsw.cmd.cstat; |
| 943 | dstat = irb->scsw.cmd.dstat; |
| 944 | |
| 945 | switch (irq_ptr->state) { |
| 946 | case QDIO_IRQ_STATE_INACTIVE: |
| 947 | qdio_establish_handle_irq(cdev, cstat, dstat); |
| 948 | break; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 949 | case QDIO_IRQ_STATE_CLEANUP: |
| 950 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE); |
| 951 | break; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 952 | case QDIO_IRQ_STATE_ESTABLISHED: |
| 953 | case QDIO_IRQ_STATE_ACTIVE: |
| 954 | if (cstat & SCHN_STAT_PCI) { |
| 955 | qdio_int_handler_pci(irq_ptr); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 956 | return; |
| 957 | } |
Jan Glauber | 4c57542 | 2009-06-12 10:26:28 +0200 | [diff] [blame] | 958 | if (cstat || dstat) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 959 | qdio_handle_activate_check(cdev, intparm, cstat, |
| 960 | dstat); |
Jan Glauber | 4c57542 | 2009-06-12 10:26:28 +0200 | [diff] [blame] | 961 | break; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 962 | default: |
| 963 | WARN_ON(1); |
| 964 | } |
| 965 | wake_up(&cdev->private->wait_q); |
| 966 | } |
| 967 | |
| 968 | /** |
| 969 | * qdio_get_ssqd_desc - get qdio subchannel description |
| 970 | * @cdev: ccw device to get description for |
Jan Glauber | bbd50e1 | 2008-12-25 13:38:43 +0100 | [diff] [blame] | 971 | * @data: where to store the ssqd |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 972 | * |
Jan Glauber | bbd50e1 | 2008-12-25 13:38:43 +0100 | [diff] [blame] | 973 | * Returns 0 or an error code. The results of the chsc are stored in the |
| 974 | * specified structure. |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 975 | */ |
Jan Glauber | bbd50e1 | 2008-12-25 13:38:43 +0100 | [diff] [blame] | 976 | int qdio_get_ssqd_desc(struct ccw_device *cdev, |
| 977 | struct qdio_ssqd_desc *data) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 978 | { |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 979 | |
Jan Glauber | bbd50e1 | 2008-12-25 13:38:43 +0100 | [diff] [blame] | 980 | if (!cdev || !cdev->private) |
| 981 | return -EINVAL; |
| 982 | |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 983 | DBF_EVENT("get ssqd:%4x", cdev->private->schid.sch_no); |
Jan Glauber | bbd50e1 | 2008-12-25 13:38:43 +0100 | [diff] [blame] | 984 | return qdio_setup_get_ssqd(NULL, &cdev->private->schid, data); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 985 | } |
| 986 | EXPORT_SYMBOL_GPL(qdio_get_ssqd_desc); |
| 987 | |
| 988 | /** |
| 989 | * qdio_cleanup - shutdown queues and free data structures |
| 990 | * @cdev: associated ccw device |
| 991 | * @how: use halt or clear to shutdown |
| 992 | * |
Jan Glauber | 700e982 | 2009-03-26 15:24:27 +0100 | [diff] [blame] | 993 | * This function calls qdio_shutdown() for @cdev with method @how. |
| 994 | * and qdio_free(). The qdio_free() return value is ignored since |
| 995 | * !irq_ptr is already checked. |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 996 | */ |
| 997 | int qdio_cleanup(struct ccw_device *cdev, int how) |
| 998 | { |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 999 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1000 | int rc; |
| 1001 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1002 | if (!irq_ptr) |
| 1003 | return -ENODEV; |
| 1004 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1005 | rc = qdio_shutdown(cdev, how); |
Jan Glauber | 700e982 | 2009-03-26 15:24:27 +0100 | [diff] [blame] | 1006 | |
| 1007 | qdio_free(cdev); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1008 | return rc; |
| 1009 | } |
| 1010 | EXPORT_SYMBOL_GPL(qdio_cleanup); |
| 1011 | |
| 1012 | static void qdio_shutdown_queues(struct ccw_device *cdev) |
| 1013 | { |
| 1014 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; |
| 1015 | struct qdio_q *q; |
| 1016 | int i; |
| 1017 | |
| 1018 | for_each_input_queue(irq_ptr, q, i) |
Jan Glauber | c38f960 | 2009-03-26 15:24:26 +0100 | [diff] [blame] | 1019 | tasklet_kill(&q->tasklet); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1020 | |
| 1021 | for_each_output_queue(irq_ptr, q, i) { |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1022 | del_timer(&q->u.out.timer); |
Jan Glauber | c38f960 | 2009-03-26 15:24:26 +0100 | [diff] [blame] | 1023 | tasklet_kill(&q->tasklet); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1024 | } |
| 1025 | } |
| 1026 | |
| 1027 | /** |
| 1028 | * qdio_shutdown - shut down a qdio subchannel |
| 1029 | * @cdev: associated ccw device |
| 1030 | * @how: use halt or clear to shutdown |
| 1031 | */ |
| 1032 | int qdio_shutdown(struct ccw_device *cdev, int how) |
| 1033 | { |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1034 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1035 | int rc; |
| 1036 | unsigned long flags; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1037 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1038 | if (!irq_ptr) |
| 1039 | return -ENODEV; |
| 1040 | |
Jan Glauber | b454740 | 2009-03-26 15:24:24 +0100 | [diff] [blame] | 1041 | BUG_ON(irqs_disabled()); |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1042 | DBF_EVENT("qshutdown:%4x", cdev->private->schid.sch_no); |
| 1043 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1044 | mutex_lock(&irq_ptr->setup_mutex); |
| 1045 | /* |
| 1046 | * Subchannel was already shot down. We cannot prevent being called |
| 1047 | * twice since cio may trigger a shutdown asynchronously. |
| 1048 | */ |
| 1049 | if (irq_ptr->state == QDIO_IRQ_STATE_INACTIVE) { |
| 1050 | mutex_unlock(&irq_ptr->setup_mutex); |
| 1051 | return 0; |
| 1052 | } |
| 1053 | |
Jan Glauber | c38f960 | 2009-03-26 15:24:26 +0100 | [diff] [blame] | 1054 | /* |
| 1055 | * Indicate that the device is going down. Scheduling the queue |
| 1056 | * tasklets is forbidden from here on. |
| 1057 | */ |
| 1058 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED); |
| 1059 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1060 | tiqdio_remove_input_queues(irq_ptr); |
| 1061 | qdio_shutdown_queues(cdev); |
| 1062 | qdio_shutdown_debug_entries(irq_ptr, cdev); |
| 1063 | |
| 1064 | /* cleanup subchannel */ |
| 1065 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); |
| 1066 | |
| 1067 | if (how & QDIO_FLAG_CLEANUP_USING_CLEAR) |
| 1068 | rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP); |
| 1069 | else |
| 1070 | /* default behaviour is halt */ |
| 1071 | rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP); |
| 1072 | if (rc) { |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1073 | DBF_ERROR("%4x SHUTD ERR", irq_ptr->schid.sch_no); |
| 1074 | DBF_ERROR("rc:%4d", rc); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1075 | goto no_cleanup; |
| 1076 | } |
| 1077 | |
| 1078 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP); |
| 1079 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
| 1080 | wait_event_interruptible_timeout(cdev->private->wait_q, |
| 1081 | irq_ptr->state == QDIO_IRQ_STATE_INACTIVE || |
| 1082 | irq_ptr->state == QDIO_IRQ_STATE_ERR, |
| 1083 | 10 * HZ); |
| 1084 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); |
| 1085 | |
| 1086 | no_cleanup: |
| 1087 | qdio_shutdown_thinint(irq_ptr); |
| 1088 | |
| 1089 | /* restore interrupt handler */ |
| 1090 | if ((void *)cdev->handler == (void *)qdio_int_handler) |
| 1091 | cdev->handler = irq_ptr->orig_handler; |
| 1092 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
| 1093 | |
| 1094 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE); |
| 1095 | mutex_unlock(&irq_ptr->setup_mutex); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1096 | if (rc) |
| 1097 | return rc; |
| 1098 | return 0; |
| 1099 | } |
| 1100 | EXPORT_SYMBOL_GPL(qdio_shutdown); |
| 1101 | |
| 1102 | /** |
| 1103 | * qdio_free - free data structures for a qdio subchannel |
| 1104 | * @cdev: associated ccw device |
| 1105 | */ |
| 1106 | int qdio_free(struct ccw_device *cdev) |
| 1107 | { |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1108 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1109 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1110 | if (!irq_ptr) |
| 1111 | return -ENODEV; |
| 1112 | |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1113 | DBF_EVENT("qfree:%4x", cdev->private->schid.sch_no); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1114 | mutex_lock(&irq_ptr->setup_mutex); |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1115 | |
| 1116 | if (irq_ptr->debug_area != NULL) { |
| 1117 | debug_unregister(irq_ptr->debug_area); |
| 1118 | irq_ptr->debug_area = NULL; |
| 1119 | } |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1120 | cdev->private->qdio_data = NULL; |
| 1121 | mutex_unlock(&irq_ptr->setup_mutex); |
| 1122 | |
| 1123 | qdio_release_memory(irq_ptr); |
| 1124 | return 0; |
| 1125 | } |
| 1126 | EXPORT_SYMBOL_GPL(qdio_free); |
| 1127 | |
| 1128 | /** |
| 1129 | * qdio_initialize - allocate and establish queues for a qdio subchannel |
| 1130 | * @init_data: initialization data |
| 1131 | * |
| 1132 | * This function first allocates queues via qdio_allocate() and on success |
| 1133 | * establishes them via qdio_establish(). |
| 1134 | */ |
| 1135 | int qdio_initialize(struct qdio_initialize *init_data) |
| 1136 | { |
| 1137 | int rc; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1138 | |
| 1139 | rc = qdio_allocate(init_data); |
| 1140 | if (rc) |
| 1141 | return rc; |
| 1142 | |
| 1143 | rc = qdio_establish(init_data); |
| 1144 | if (rc) |
| 1145 | qdio_free(init_data->cdev); |
| 1146 | return rc; |
| 1147 | } |
| 1148 | EXPORT_SYMBOL_GPL(qdio_initialize); |
| 1149 | |
| 1150 | /** |
| 1151 | * qdio_allocate - allocate qdio queues and associated data |
| 1152 | * @init_data: initialization data |
| 1153 | */ |
| 1154 | int qdio_allocate(struct qdio_initialize *init_data) |
| 1155 | { |
| 1156 | struct qdio_irq *irq_ptr; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1157 | |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1158 | DBF_EVENT("qallocate:%4x", init_data->cdev->private->schid.sch_no); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1159 | |
| 1160 | if ((init_data->no_input_qs && !init_data->input_handler) || |
| 1161 | (init_data->no_output_qs && !init_data->output_handler)) |
| 1162 | return -EINVAL; |
| 1163 | |
| 1164 | if ((init_data->no_input_qs > QDIO_MAX_QUEUES_PER_IRQ) || |
| 1165 | (init_data->no_output_qs > QDIO_MAX_QUEUES_PER_IRQ)) |
| 1166 | return -EINVAL; |
| 1167 | |
| 1168 | if ((!init_data->input_sbal_addr_array) || |
| 1169 | (!init_data->output_sbal_addr_array)) |
| 1170 | return -EINVAL; |
| 1171 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1172 | /* irq_ptr must be in GFP_DMA since it contains ccw1.cda */ |
| 1173 | irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| 1174 | if (!irq_ptr) |
| 1175 | goto out_err; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1176 | |
| 1177 | mutex_init(&irq_ptr->setup_mutex); |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1178 | qdio_allocate_dbf(init_data, irq_ptr); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1179 | |
| 1180 | /* |
| 1181 | * Allocate a page for the chsc calls in qdio_establish. |
| 1182 | * Must be pre-allocated since a zfcp recovery will call |
| 1183 | * qdio_establish. In case of low memory and swap on a zfcp disk |
| 1184 | * we may not be able to allocate memory otherwise. |
| 1185 | */ |
| 1186 | irq_ptr->chsc_page = get_zeroed_page(GFP_KERNEL); |
| 1187 | if (!irq_ptr->chsc_page) |
| 1188 | goto out_rel; |
| 1189 | |
| 1190 | /* qdr is used in ccw1.cda which is u32 */ |
Jan Glauber | 3b8e300 | 2008-08-01 16:39:17 +0200 | [diff] [blame] | 1191 | irq_ptr->qdr = (struct qdr *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1192 | if (!irq_ptr->qdr) |
| 1193 | goto out_rel; |
| 1194 | WARN_ON((unsigned long)irq_ptr->qdr & 0xfff); |
| 1195 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1196 | if (qdio_allocate_qs(irq_ptr, init_data->no_input_qs, |
| 1197 | init_data->no_output_qs)) |
| 1198 | goto out_rel; |
| 1199 | |
| 1200 | init_data->cdev->private->qdio_data = irq_ptr; |
| 1201 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE); |
| 1202 | return 0; |
| 1203 | out_rel: |
| 1204 | qdio_release_memory(irq_ptr); |
| 1205 | out_err: |
| 1206 | return -ENOMEM; |
| 1207 | } |
| 1208 | EXPORT_SYMBOL_GPL(qdio_allocate); |
| 1209 | |
| 1210 | /** |
| 1211 | * qdio_establish - establish queues on a qdio subchannel |
| 1212 | * @init_data: initialization data |
| 1213 | */ |
| 1214 | int qdio_establish(struct qdio_initialize *init_data) |
| 1215 | { |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1216 | struct qdio_irq *irq_ptr; |
| 1217 | struct ccw_device *cdev = init_data->cdev; |
| 1218 | unsigned long saveflags; |
| 1219 | int rc; |
| 1220 | |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1221 | DBF_EVENT("qestablish:%4x", cdev->private->schid.sch_no); |
Jan Glauber | 58eb27c | 2008-08-21 19:46:34 +0200 | [diff] [blame] | 1222 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1223 | irq_ptr = cdev->private->qdio_data; |
| 1224 | if (!irq_ptr) |
| 1225 | return -ENODEV; |
| 1226 | |
| 1227 | if (cdev->private->state != DEV_STATE_ONLINE) |
| 1228 | return -EINVAL; |
| 1229 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1230 | mutex_lock(&irq_ptr->setup_mutex); |
| 1231 | qdio_setup_irq(init_data); |
| 1232 | |
| 1233 | rc = qdio_establish_thinint(irq_ptr); |
| 1234 | if (rc) { |
| 1235 | mutex_unlock(&irq_ptr->setup_mutex); |
| 1236 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); |
| 1237 | return rc; |
| 1238 | } |
| 1239 | |
| 1240 | /* establish q */ |
| 1241 | irq_ptr->ccw.cmd_code = irq_ptr->equeue.cmd; |
| 1242 | irq_ptr->ccw.flags = CCW_FLAG_SLI; |
| 1243 | irq_ptr->ccw.count = irq_ptr->equeue.count; |
| 1244 | irq_ptr->ccw.cda = (u32)((addr_t)irq_ptr->qdr); |
| 1245 | |
| 1246 | spin_lock_irqsave(get_ccwdev_lock(cdev), saveflags); |
| 1247 | ccw_device_set_options_mask(cdev, 0); |
| 1248 | |
| 1249 | rc = ccw_device_start(cdev, &irq_ptr->ccw, QDIO_DOING_ESTABLISH, 0, 0); |
| 1250 | if (rc) { |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1251 | DBF_ERROR("%4x est IO ERR", irq_ptr->schid.sch_no); |
| 1252 | DBF_ERROR("rc:%4x", rc); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1253 | } |
| 1254 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), saveflags); |
| 1255 | |
| 1256 | if (rc) { |
| 1257 | mutex_unlock(&irq_ptr->setup_mutex); |
| 1258 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); |
| 1259 | return rc; |
| 1260 | } |
| 1261 | |
| 1262 | wait_event_interruptible_timeout(cdev->private->wait_q, |
| 1263 | irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED || |
| 1264 | irq_ptr->state == QDIO_IRQ_STATE_ERR, HZ); |
| 1265 | |
| 1266 | if (irq_ptr->state != QDIO_IRQ_STATE_ESTABLISHED) { |
| 1267 | mutex_unlock(&irq_ptr->setup_mutex); |
| 1268 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); |
| 1269 | return -EIO; |
| 1270 | } |
| 1271 | |
| 1272 | qdio_setup_ssqd_info(irq_ptr); |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1273 | DBF_EVENT("qDmmwc:%2x", irq_ptr->ssqd_desc.mmwc); |
| 1274 | DBF_EVENT("qib ac:%4x", irq_ptr->qib.ac); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1275 | |
| 1276 | /* qebsm is now setup if available, initialize buffer states */ |
| 1277 | qdio_init_buf_states(irq_ptr); |
| 1278 | |
| 1279 | mutex_unlock(&irq_ptr->setup_mutex); |
| 1280 | qdio_print_subchannel_info(irq_ptr, cdev); |
| 1281 | qdio_setup_debug_entries(irq_ptr, cdev); |
| 1282 | return 0; |
| 1283 | } |
| 1284 | EXPORT_SYMBOL_GPL(qdio_establish); |
| 1285 | |
| 1286 | /** |
| 1287 | * qdio_activate - activate queues on a qdio subchannel |
| 1288 | * @cdev: associated cdev |
| 1289 | */ |
| 1290 | int qdio_activate(struct ccw_device *cdev) |
| 1291 | { |
| 1292 | struct qdio_irq *irq_ptr; |
| 1293 | int rc; |
| 1294 | unsigned long saveflags; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1295 | |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1296 | DBF_EVENT("qactivate:%4x", cdev->private->schid.sch_no); |
Jan Glauber | 58eb27c | 2008-08-21 19:46:34 +0200 | [diff] [blame] | 1297 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1298 | irq_ptr = cdev->private->qdio_data; |
| 1299 | if (!irq_ptr) |
| 1300 | return -ENODEV; |
| 1301 | |
| 1302 | if (cdev->private->state != DEV_STATE_ONLINE) |
| 1303 | return -EINVAL; |
| 1304 | |
| 1305 | mutex_lock(&irq_ptr->setup_mutex); |
| 1306 | if (irq_ptr->state == QDIO_IRQ_STATE_INACTIVE) { |
| 1307 | rc = -EBUSY; |
| 1308 | goto out; |
| 1309 | } |
| 1310 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1311 | irq_ptr->ccw.cmd_code = irq_ptr->aqueue.cmd; |
| 1312 | irq_ptr->ccw.flags = CCW_FLAG_SLI; |
| 1313 | irq_ptr->ccw.count = irq_ptr->aqueue.count; |
| 1314 | irq_ptr->ccw.cda = 0; |
| 1315 | |
| 1316 | spin_lock_irqsave(get_ccwdev_lock(cdev), saveflags); |
| 1317 | ccw_device_set_options(cdev, CCWDEV_REPORT_ALL); |
| 1318 | |
| 1319 | rc = ccw_device_start(cdev, &irq_ptr->ccw, QDIO_DOING_ACTIVATE, |
| 1320 | 0, DOIO_DENY_PREFETCH); |
| 1321 | if (rc) { |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1322 | DBF_ERROR("%4x act IO ERR", irq_ptr->schid.sch_no); |
| 1323 | DBF_ERROR("rc:%4x", rc); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1324 | } |
| 1325 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), saveflags); |
| 1326 | |
| 1327 | if (rc) |
| 1328 | goto out; |
| 1329 | |
| 1330 | if (is_thinint_irq(irq_ptr)) |
| 1331 | tiqdio_add_input_queues(irq_ptr); |
| 1332 | |
| 1333 | /* wait for subchannel to become active */ |
| 1334 | msleep(5); |
| 1335 | |
| 1336 | switch (irq_ptr->state) { |
| 1337 | case QDIO_IRQ_STATE_STOPPED: |
| 1338 | case QDIO_IRQ_STATE_ERR: |
Jan Glauber | e4c14e2 | 2009-03-26 15:24:25 +0100 | [diff] [blame] | 1339 | rc = -EIO; |
| 1340 | break; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1341 | default: |
| 1342 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE); |
| 1343 | rc = 0; |
| 1344 | } |
| 1345 | out: |
| 1346 | mutex_unlock(&irq_ptr->setup_mutex); |
| 1347 | return rc; |
| 1348 | } |
| 1349 | EXPORT_SYMBOL_GPL(qdio_activate); |
| 1350 | |
| 1351 | static inline int buf_in_between(int bufnr, int start, int count) |
| 1352 | { |
| 1353 | int end = add_buf(start, count); |
| 1354 | |
| 1355 | if (end > start) { |
| 1356 | if (bufnr >= start && bufnr < end) |
| 1357 | return 1; |
| 1358 | else |
| 1359 | return 0; |
| 1360 | } |
| 1361 | |
| 1362 | /* wrap-around case */ |
| 1363 | if ((bufnr >= start && bufnr <= QDIO_MAX_BUFFERS_PER_Q) || |
| 1364 | (bufnr < end)) |
| 1365 | return 1; |
| 1366 | else |
| 1367 | return 0; |
| 1368 | } |
| 1369 | |
| 1370 | /** |
| 1371 | * handle_inbound - reset processed input buffers |
| 1372 | * @q: queue containing the buffers |
| 1373 | * @callflags: flags |
| 1374 | * @bufnr: first buffer to process |
| 1375 | * @count: how many buffers are emptied |
| 1376 | */ |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 1377 | static int handle_inbound(struct qdio_q *q, unsigned int callflags, |
| 1378 | int bufnr, int count) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1379 | { |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 1380 | int used, diff; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1381 | |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 1382 | if (!q->u.in.polling) |
| 1383 | goto set; |
| 1384 | |
| 1385 | /* protect against stop polling setting an ACK for an emptied slsb */ |
| 1386 | if (count == QDIO_MAX_BUFFERS_PER_Q) { |
| 1387 | /* overwriting everything, just delete polling status */ |
| 1388 | q->u.in.polling = 0; |
| 1389 | q->u.in.ack_count = 0; |
| 1390 | goto set; |
Jan Glauber | e85dea0 | 2009-03-26 15:24:29 +0100 | [diff] [blame] | 1391 | } else if (buf_in_between(q->u.in.ack_start, bufnr, count)) { |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 1392 | if (is_qebsm(q)) { |
Jan Glauber | e85dea0 | 2009-03-26 15:24:29 +0100 | [diff] [blame] | 1393 | /* partial overwrite, just update ack_start */ |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 1394 | diff = add_buf(bufnr, count); |
Jan Glauber | e85dea0 | 2009-03-26 15:24:29 +0100 | [diff] [blame] | 1395 | diff = sub_buf(diff, q->u.in.ack_start); |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 1396 | q->u.in.ack_count -= diff; |
| 1397 | if (q->u.in.ack_count <= 0) { |
| 1398 | q->u.in.polling = 0; |
| 1399 | q->u.in.ack_count = 0; |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 1400 | goto set; |
| 1401 | } |
Jan Glauber | e85dea0 | 2009-03-26 15:24:29 +0100 | [diff] [blame] | 1402 | q->u.in.ack_start = add_buf(q->u.in.ack_start, diff); |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 1403 | } |
| 1404 | else |
| 1405 | /* the only ACK will be deleted, so stop polling */ |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1406 | q->u.in.polling = 0; |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 1407 | } |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1408 | |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 1409 | set: |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1410 | count = set_buf_states(q, bufnr, SLSB_CU_INPUT_EMPTY, count); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1411 | |
| 1412 | used = atomic_add_return(count, &q->nr_buf_used) - count; |
| 1413 | BUG_ON(used + count > QDIO_MAX_BUFFERS_PER_Q); |
| 1414 | |
| 1415 | /* no need to signal as long as the adapter had free buffers */ |
| 1416 | if (used) |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 1417 | return 0; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1418 | |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 1419 | if (need_siga_in(q)) |
| 1420 | return qdio_siga_input(q); |
| 1421 | return 0; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1422 | } |
| 1423 | |
| 1424 | /** |
| 1425 | * handle_outbound - process filled outbound buffers |
| 1426 | * @q: queue containing the buffers |
| 1427 | * @callflags: flags |
| 1428 | * @bufnr: first buffer to process |
| 1429 | * @count: how many buffers are filled |
| 1430 | */ |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 1431 | static int handle_outbound(struct qdio_q *q, unsigned int callflags, |
| 1432 | int bufnr, int count) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1433 | { |
| 1434 | unsigned char state; |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 1435 | int used, rc = 0; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1436 | |
| 1437 | qdio_perf_stat_inc(&perf_stats.outbound_handler); |
| 1438 | |
| 1439 | count = set_buf_states(q, bufnr, SLSB_CU_OUTPUT_PRIMED, count); |
| 1440 | used = atomic_add_return(count, &q->nr_buf_used); |
| 1441 | BUG_ON(used > QDIO_MAX_BUFFERS_PER_Q); |
| 1442 | |
| 1443 | if (callflags & QDIO_FLAG_PCI_OUT) |
| 1444 | q->u.out.pci_out_enabled = 1; |
| 1445 | else |
| 1446 | q->u.out.pci_out_enabled = 0; |
| 1447 | |
| 1448 | if (queue_type(q) == QDIO_IQDIO_QFMT) { |
| 1449 | if (multicast_outbound(q)) |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 1450 | rc = qdio_kick_outbound_q(q); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1451 | else |
Klaus-Dieter Wacker | 7a0f475 | 2008-10-10 21:33:18 +0200 | [diff] [blame] | 1452 | if ((q->irq_ptr->ssqd_desc.mmwc > 1) && |
| 1453 | (count > 1) && |
| 1454 | (count <= q->irq_ptr->ssqd_desc.mmwc)) { |
| 1455 | /* exploit enhanced SIGA */ |
| 1456 | q->u.out.use_enh_siga = 1; |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 1457 | rc = qdio_kick_outbound_q(q); |
Klaus-Dieter Wacker | 7a0f475 | 2008-10-10 21:33:18 +0200 | [diff] [blame] | 1458 | } else { |
| 1459 | /* |
| 1460 | * One siga-w per buffer required for unicast |
| 1461 | * HiperSockets. |
| 1462 | */ |
| 1463 | q->u.out.use_enh_siga = 0; |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 1464 | while (count--) { |
| 1465 | rc = qdio_kick_outbound_q(q); |
| 1466 | if (rc) |
| 1467 | goto out; |
| 1468 | } |
Klaus-Dieter Wacker | 7a0f475 | 2008-10-10 21:33:18 +0200 | [diff] [blame] | 1469 | } |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1470 | goto out; |
| 1471 | } |
| 1472 | |
| 1473 | if (need_siga_sync(q)) { |
| 1474 | qdio_siga_sync_q(q); |
| 1475 | goto out; |
| 1476 | } |
| 1477 | |
| 1478 | /* try to fast requeue buffers */ |
Jan Glauber | 50f769d | 2008-12-25 13:38:47 +0100 | [diff] [blame] | 1479 | get_buf_state(q, prev_buf(bufnr), &state, 0); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1480 | if (state != SLSB_CU_OUTPUT_PRIMED) |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 1481 | rc = qdio_kick_outbound_q(q); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1482 | else { |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1483 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "fast-req"); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1484 | qdio_perf_stat_inc(&perf_stats.fast_requeue); |
| 1485 | } |
| 1486 | out: |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1487 | tasklet_schedule(&q->tasklet); |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 1488 | return rc; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1489 | } |
| 1490 | |
| 1491 | /** |
| 1492 | * do_QDIO - process input or output buffers |
| 1493 | * @cdev: associated ccw_device for the qdio subchannel |
| 1494 | * @callflags: input or output and special flags from the program |
| 1495 | * @q_nr: queue number |
| 1496 | * @bufnr: buffer number |
| 1497 | * @count: how many buffers to process |
| 1498 | */ |
| 1499 | int do_QDIO(struct ccw_device *cdev, unsigned int callflags, |
Jan Glauber | 6618241 | 2009-06-22 12:08:15 +0200 | [diff] [blame] | 1500 | int q_nr, unsigned int bufnr, unsigned int count) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1501 | { |
| 1502 | struct qdio_irq *irq_ptr; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1503 | |
Jan Glauber | 6618241 | 2009-06-22 12:08:15 +0200 | [diff] [blame] | 1504 | if (bufnr >= QDIO_MAX_BUFFERS_PER_Q || count > QDIO_MAX_BUFFERS_PER_Q) |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1505 | return -EINVAL; |
| 1506 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1507 | irq_ptr = cdev->private->qdio_data; |
| 1508 | if (!irq_ptr) |
| 1509 | return -ENODEV; |
| 1510 | |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1511 | if (callflags & QDIO_FLAG_SYNC_INPUT) |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1512 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, "doQDIO input"); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1513 | else |
Jan Glauber | 22f9934 | 2008-12-25 13:38:46 +0100 | [diff] [blame] | 1514 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, "doQDIO output"); |
| 1515 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, "q:%1d flag:%4x", q_nr, callflags); |
| 1516 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, "buf:%2d cnt:%3d", bufnr, count); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1517 | |
| 1518 | if (irq_ptr->state != QDIO_IRQ_STATE_ACTIVE) |
| 1519 | return -EBUSY; |
| 1520 | |
| 1521 | if (callflags & QDIO_FLAG_SYNC_INPUT) |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 1522 | return handle_inbound(irq_ptr->input_qs[q_nr], |
| 1523 | callflags, bufnr, count); |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1524 | else if (callflags & QDIO_FLAG_SYNC_OUTPUT) |
Jan Glauber | d303b6f | 2009-03-26 15:24:31 +0100 | [diff] [blame] | 1525 | return handle_outbound(irq_ptr->output_qs[q_nr], |
| 1526 | callflags, bufnr, count); |
| 1527 | return -EINVAL; |
Jan Glauber | 779e6e1 | 2008-07-17 17:16:48 +0200 | [diff] [blame] | 1528 | } |
| 1529 | EXPORT_SYMBOL_GPL(do_QDIO); |
| 1530 | |
| 1531 | static int __init init_QDIO(void) |
| 1532 | { |
| 1533 | int rc; |
| 1534 | |
| 1535 | rc = qdio_setup_init(); |
| 1536 | if (rc) |
| 1537 | return rc; |
| 1538 | rc = tiqdio_allocate_memory(); |
| 1539 | if (rc) |
| 1540 | goto out_cache; |
| 1541 | rc = qdio_debug_init(); |
| 1542 | if (rc) |
| 1543 | goto out_ti; |
| 1544 | rc = qdio_setup_perf_stats(); |
| 1545 | if (rc) |
| 1546 | goto out_debug; |
| 1547 | rc = tiqdio_register_thinints(); |
| 1548 | if (rc) |
| 1549 | goto out_perf; |
| 1550 | return 0; |
| 1551 | |
| 1552 | out_perf: |
| 1553 | qdio_remove_perf_stats(); |
| 1554 | out_debug: |
| 1555 | qdio_debug_exit(); |
| 1556 | out_ti: |
| 1557 | tiqdio_free_memory(); |
| 1558 | out_cache: |
| 1559 | qdio_setup_exit(); |
| 1560 | return rc; |
| 1561 | } |
| 1562 | |
| 1563 | static void __exit exit_QDIO(void) |
| 1564 | { |
| 1565 | tiqdio_unregister_thinints(); |
| 1566 | tiqdio_free_memory(); |
| 1567 | qdio_remove_perf_stats(); |
| 1568 | qdio_debug_exit(); |
| 1569 | qdio_setup_exit(); |
| 1570 | } |
| 1571 | |
| 1572 | module_init(init_QDIO); |
| 1573 | module_exit(exit_QDIO); |