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Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
00bab910 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
00bab910 | 4 | * Setup and helper functions to access QDIO. |
1da177e4 | 5 | * |
42428f74 | 6 | * Copyright IBM Corporation 2002, 2009 |
1da177e4 LT |
7 | */ |
8 | ||
ecf39d42 CS |
9 | #define KMSG_COMPONENT "zfcp" |
10 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
11 | ||
1da177e4 LT |
12 | #include "zfcp_ext.h" |
13 | ||
5d4e2262 | 14 | #define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer)) |
1da177e4 | 15 | |
00bab910 | 16 | static int zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbal) |
1da177e4 | 17 | { |
b4e44590 | 18 | int pos; |
1da177e4 | 19 | |
b4e44590 | 20 | for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos += QBUFF_PER_PAGE) { |
00bab910 SS |
21 | sbal[pos] = (struct qdio_buffer *) get_zeroed_page(GFP_KERNEL); |
22 | if (!sbal[pos]) | |
b4e44590 | 23 | return -ENOMEM; |
b4e44590 SS |
24 | } |
25 | for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos++) | |
26 | if (pos % QBUFF_PER_PAGE) | |
00bab910 | 27 | sbal[pos] = sbal[pos - 1] + 1; |
b4e44590 | 28 | return 0; |
1da177e4 LT |
29 | } |
30 | ||
44cc76f2 | 31 | static struct qdio_buffer_element * |
00bab910 | 32 | zfcp_qdio_sbale(struct zfcp_qdio_queue *q, int sbal_idx, int sbale_idx) |
1da177e4 | 33 | { |
00bab910 | 34 | return &q->sbal[sbal_idx]->element[sbale_idx]; |
1da177e4 LT |
35 | } |
36 | ||
564e1c86 | 37 | static void zfcp_qdio_handler_error(struct zfcp_qdio *qdio, char *id) |
1da177e4 | 38 | { |
564e1c86 SS |
39 | struct zfcp_adapter *adapter = qdio->adapter; |
40 | ||
ff3b24fa | 41 | dev_warn(&adapter->ccw_device->dev, "A QDIO problem occurred\n"); |
1da177e4 | 42 | |
00bab910 SS |
43 | zfcp_erp_adapter_reopen(adapter, |
44 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | | |
45 | ZFCP_STATUS_COMMON_ERP_FAILED, id, NULL); | |
1da177e4 LT |
46 | } |
47 | ||
5d4e2262 CS |
48 | static void zfcp_qdio_zero_sbals(struct qdio_buffer *sbal[], int first, int cnt) |
49 | { | |
50 | int i, sbal_idx; | |
51 | ||
52 | for (i = first; i < first + cnt; i++) { | |
53 | sbal_idx = i % QDIO_MAX_BUFFERS_PER_Q; | |
54 | memset(sbal[sbal_idx], 0, sizeof(struct qdio_buffer)); | |
55 | } | |
56 | } | |
57 | ||
94506fd1 | 58 | /* this needs to be called prior to updating the queue fill level */ |
41e05a12 | 59 | static inline void zfcp_qdio_account(struct zfcp_qdio *qdio) |
94506fd1 | 60 | { |
41e05a12 | 61 | unsigned long long now, span; |
94506fd1 MP |
62 | int free, used; |
63 | ||
564e1c86 | 64 | spin_lock(&qdio->stat_lock); |
41e05a12 HC |
65 | now = get_clock_monotonic(); |
66 | span = (now - qdio->req_q_time) >> 12; | |
67 | free = atomic_read(&qdio->req_q.count); | |
94506fd1 | 68 | used = QDIO_MAX_BUFFERS_PER_Q - free; |
564e1c86 SS |
69 | qdio->req_q_util += used * span; |
70 | qdio->req_q_time = now; | |
71 | spin_unlock(&qdio->stat_lock); | |
94506fd1 MP |
72 | } |
73 | ||
779e6e1c JG |
74 | static void zfcp_qdio_int_req(struct ccw_device *cdev, unsigned int qdio_err, |
75 | int queue_no, int first, int count, | |
00bab910 | 76 | unsigned long parm) |
1da177e4 | 77 | { |
564e1c86 SS |
78 | struct zfcp_qdio *qdio = (struct zfcp_qdio *) parm; |
79 | struct zfcp_qdio_queue *queue = &qdio->req_q; | |
1da177e4 | 80 | |
779e6e1c | 81 | if (unlikely(qdio_err)) { |
5771710b SS |
82 | zfcp_dbf_hba_qdio(qdio->adapter->dbf, qdio_err, first, |
83 | count); | |
564e1c86 | 84 | zfcp_qdio_handler_error(qdio, "qdireq1"); |
00bab910 SS |
85 | return; |
86 | } | |
1da177e4 LT |
87 | |
88 | /* cleanup all SBALs being program-owned now */ | |
00bab910 | 89 | zfcp_qdio_zero_sbals(queue->sbal, first, count); |
1da177e4 | 90 | |
564e1c86 | 91 | zfcp_qdio_account(qdio); |
00bab910 | 92 | atomic_add(count, &queue->count); |
564e1c86 | 93 | wake_up(&qdio->req_q_wq); |
1da177e4 LT |
94 | } |
95 | ||
564e1c86 | 96 | static void zfcp_qdio_resp_put_back(struct zfcp_qdio *qdio, int processed) |
1da177e4 | 97 | { |
564e1c86 SS |
98 | struct zfcp_qdio_queue *queue = &qdio->resp_q; |
99 | struct ccw_device *cdev = qdio->adapter->ccw_device; | |
00bab910 SS |
100 | u8 count, start = queue->first; |
101 | unsigned int retval; | |
1da177e4 | 102 | |
00bab910 SS |
103 | count = atomic_read(&queue->count) + processed; |
104 | ||
779e6e1c | 105 | retval = do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT, 0, start, count); |
00bab910 SS |
106 | |
107 | if (unlikely(retval)) { | |
108 | atomic_set(&queue->count, count); | |
452b505c | 109 | zfcp_erp_adapter_reopen(qdio->adapter, 0, "qdrpb_1", NULL); |
00bab910 SS |
110 | } else { |
111 | queue->first += count; | |
112 | queue->first %= QDIO_MAX_BUFFERS_PER_Q; | |
113 | atomic_set(&queue->count, 0); | |
114 | } | |
115 | } | |
116 | ||
779e6e1c JG |
117 | static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int qdio_err, |
118 | int queue_no, int first, int count, | |
00bab910 SS |
119 | unsigned long parm) |
120 | { | |
564e1c86 | 121 | struct zfcp_qdio *qdio = (struct zfcp_qdio *) parm; |
bd63eaf4 | 122 | int sbal_idx, sbal_no; |
00bab910 | 123 | |
779e6e1c | 124 | if (unlikely(qdio_err)) { |
5771710b SS |
125 | zfcp_dbf_hba_qdio(qdio->adapter->dbf, qdio_err, first, |
126 | count); | |
564e1c86 | 127 | zfcp_qdio_handler_error(qdio, "qdires1"); |
00bab910 SS |
128 | return; |
129 | } | |
1da177e4 | 130 | |
1da177e4 LT |
131 | /* |
132 | * go through all SBALs from input queue currently | |
133 | * returned by QDIO layer | |
134 | */ | |
00bab910 SS |
135 | for (sbal_no = 0; sbal_no < count; sbal_no++) { |
136 | sbal_idx = (first + sbal_no) % QDIO_MAX_BUFFERS_PER_Q; | |
1da177e4 | 137 | /* go through all SBALEs of SBAL */ |
564e1c86 | 138 | zfcp_fsf_reqid_check(qdio, sbal_idx); |
1da177e4 LT |
139 | } |
140 | ||
141 | /* | |
142 | * put range of SBALs back to response queue | |
143 | * (including SBALs which have already been free before) | |
144 | */ | |
564e1c86 | 145 | zfcp_qdio_resp_put_back(qdio, count); |
1da177e4 LT |
146 | } |
147 | ||
1da177e4 | 148 | /** |
00bab910 | 149 | * zfcp_qdio_sbale_req - return ptr to SBALE of req_q for a struct zfcp_fsf_req |
564e1c86 | 150 | * @qdio: pointer to struct zfcp_qdio |
42428f74 | 151 | * @q_rec: pointer to struct zfcp_queue_rec |
00bab910 | 152 | * Returns: pointer to qdio_buffer_element (SBALE) structure |
1da177e4 | 153 | */ |
564e1c86 | 154 | struct qdio_buffer_element *zfcp_qdio_sbale_req(struct zfcp_qdio *qdio, |
42428f74 | 155 | struct zfcp_queue_req *q_req) |
1da177e4 | 156 | { |
564e1c86 | 157 | return zfcp_qdio_sbale(&qdio->req_q, q_req->sbal_last, 0); |
1da177e4 LT |
158 | } |
159 | ||
160 | /** | |
00bab910 SS |
161 | * zfcp_qdio_sbale_curr - return curr SBALE on req_q for a struct zfcp_fsf_req |
162 | * @fsf_req: pointer to struct fsf_req | |
163 | * Returns: pointer to qdio_buffer_element (SBALE) structure | |
1da177e4 | 164 | */ |
564e1c86 | 165 | struct qdio_buffer_element *zfcp_qdio_sbale_curr(struct zfcp_qdio *qdio, |
42428f74 | 166 | struct zfcp_queue_req *q_req) |
1da177e4 | 167 | { |
564e1c86 | 168 | return zfcp_qdio_sbale(&qdio->req_q, q_req->sbal_last, |
42428f74 | 169 | q_req->sbale_curr); |
1da177e4 LT |
170 | } |
171 | ||
564e1c86 | 172 | static void zfcp_qdio_sbal_limit(struct zfcp_qdio *qdio, |
42428f74 | 173 | struct zfcp_queue_req *q_req, int max_sbals) |
1da177e4 | 174 | { |
564e1c86 | 175 | int count = atomic_read(&qdio->req_q.count); |
1da177e4 | 176 | count = min(count, max_sbals); |
42428f74 | 177 | q_req->sbal_limit = (q_req->sbal_first + count - 1) |
00bab910 | 178 | % QDIO_MAX_BUFFERS_PER_Q; |
1da177e4 LT |
179 | } |
180 | ||
44cc76f2 | 181 | static struct qdio_buffer_element * |
564e1c86 | 182 | zfcp_qdio_sbal_chain(struct zfcp_qdio *qdio, struct zfcp_queue_req *q_req, |
42428f74 | 183 | unsigned long sbtype) |
1da177e4 | 184 | { |
44cc76f2 | 185 | struct qdio_buffer_element *sbale; |
1da177e4 LT |
186 | |
187 | /* set last entry flag in current SBALE of current SBAL */ | |
564e1c86 | 188 | sbale = zfcp_qdio_sbale_curr(qdio, q_req); |
1da177e4 LT |
189 | sbale->flags |= SBAL_FLAGS_LAST_ENTRY; |
190 | ||
191 | /* don't exceed last allowed SBAL */ | |
42428f74 | 192 | if (q_req->sbal_last == q_req->sbal_limit) |
1da177e4 LT |
193 | return NULL; |
194 | ||
195 | /* set chaining flag in first SBALE of current SBAL */ | |
564e1c86 | 196 | sbale = zfcp_qdio_sbale_req(qdio, q_req); |
1da177e4 LT |
197 | sbale->flags |= SBAL_FLAGS0_MORE_SBALS; |
198 | ||
199 | /* calculate index of next SBAL */ | |
42428f74 SS |
200 | q_req->sbal_last++; |
201 | q_req->sbal_last %= QDIO_MAX_BUFFERS_PER_Q; | |
1da177e4 LT |
202 | |
203 | /* keep this requests number of SBALs up-to-date */ | |
42428f74 | 204 | q_req->sbal_number++; |
1da177e4 LT |
205 | |
206 | /* start at first SBALE of new SBAL */ | |
42428f74 | 207 | q_req->sbale_curr = 0; |
1da177e4 LT |
208 | |
209 | /* set storage-block type for new SBAL */ | |
564e1c86 | 210 | sbale = zfcp_qdio_sbale_curr(qdio, q_req); |
1da177e4 LT |
211 | sbale->flags |= sbtype; |
212 | ||
213 | return sbale; | |
214 | } | |
215 | ||
44cc76f2 | 216 | static struct qdio_buffer_element * |
564e1c86 | 217 | zfcp_qdio_sbale_next(struct zfcp_qdio *qdio, struct zfcp_queue_req *q_req, |
42428f74 | 218 | unsigned int sbtype) |
1da177e4 | 219 | { |
42428f74 | 220 | if (q_req->sbale_curr == ZFCP_LAST_SBALE_PER_SBAL) |
564e1c86 | 221 | return zfcp_qdio_sbal_chain(qdio, q_req, sbtype); |
42428f74 | 222 | q_req->sbale_curr++; |
564e1c86 | 223 | return zfcp_qdio_sbale_curr(qdio, q_req); |
1da177e4 LT |
224 | } |
225 | ||
564e1c86 | 226 | static void zfcp_qdio_undo_sbals(struct zfcp_qdio *qdio, |
42428f74 | 227 | struct zfcp_queue_req *q_req) |
1da177e4 | 228 | { |
564e1c86 | 229 | struct qdio_buffer **sbal = qdio->req_q.sbal; |
42428f74 SS |
230 | int first = q_req->sbal_first; |
231 | int last = q_req->sbal_last; | |
00bab910 SS |
232 | int count = (last - first + QDIO_MAX_BUFFERS_PER_Q) % |
233 | QDIO_MAX_BUFFERS_PER_Q + 1; | |
234 | zfcp_qdio_zero_sbals(sbal, first, count); | |
1da177e4 LT |
235 | } |
236 | ||
564e1c86 | 237 | static int zfcp_qdio_fill_sbals(struct zfcp_qdio *qdio, |
42428f74 | 238 | struct zfcp_queue_req *q_req, |
00bab910 SS |
239 | unsigned int sbtype, void *start_addr, |
240 | unsigned int total_length) | |
1da177e4 | 241 | { |
44cc76f2 | 242 | struct qdio_buffer_element *sbale; |
1da177e4 LT |
243 | unsigned long remaining, length; |
244 | void *addr; | |
245 | ||
00bab910 | 246 | /* split segment up */ |
1da177e4 LT |
247 | for (addr = start_addr, remaining = total_length; remaining > 0; |
248 | addr += length, remaining -= length) { | |
564e1c86 | 249 | sbale = zfcp_qdio_sbale_next(qdio, q_req, sbtype); |
00bab910 | 250 | if (!sbale) { |
564e1c86 SS |
251 | atomic_inc(&qdio->req_q_full); |
252 | zfcp_qdio_undo_sbals(qdio, q_req); | |
1da177e4 LT |
253 | return -EINVAL; |
254 | } | |
00bab910 SS |
255 | |
256 | /* new piece must not exceed next page boundary */ | |
1da177e4 | 257 | length = min(remaining, |
00bab910 | 258 | (PAGE_SIZE - ((unsigned long)addr & |
1da177e4 | 259 | (PAGE_SIZE - 1)))); |
00bab910 SS |
260 | sbale->addr = addr; |
261 | sbale->length = length; | |
1da177e4 | 262 | } |
00bab910 | 263 | return 0; |
1da177e4 LT |
264 | } |
265 | ||
1da177e4 LT |
266 | /** |
267 | * zfcp_qdio_sbals_from_sg - fill SBALs from scatter-gather list | |
268 | * @fsf_req: request to be processed | |
269 | * @sbtype: SBALE flags | |
270 | * @sg: scatter-gather list | |
1da177e4 | 271 | * @max_sbals: upper bound for number of SBALs to be used |
00bab910 | 272 | * Returns: number of bytes, or error (negativ) |
1da177e4 | 273 | */ |
564e1c86 | 274 | int zfcp_qdio_sbals_from_sg(struct zfcp_qdio *qdio, |
42428f74 SS |
275 | struct zfcp_queue_req *q_req, |
276 | unsigned long sbtype, struct scatterlist *sg, | |
277 | int max_sbals) | |
1da177e4 | 278 | { |
44cc76f2 | 279 | struct qdio_buffer_element *sbale; |
00bab910 | 280 | int retval, bytes = 0; |
1da177e4 LT |
281 | |
282 | /* figure out last allowed SBAL */ | |
564e1c86 | 283 | zfcp_qdio_sbal_limit(qdio, q_req, max_sbals); |
1da177e4 | 284 | |
00bab910 | 285 | /* set storage-block type for this request */ |
564e1c86 | 286 | sbale = zfcp_qdio_sbale_req(qdio, q_req); |
1da177e4 LT |
287 | sbale->flags |= sbtype; |
288 | ||
00bab910 | 289 | for (; sg; sg = sg_next(sg)) { |
564e1c86 | 290 | retval = zfcp_qdio_fill_sbals(qdio, q_req, sbtype, |
42428f74 | 291 | sg_virt(sg), sg->length); |
00bab910 SS |
292 | if (retval < 0) |
293 | return retval; | |
294 | bytes += sg->length; | |
1da177e4 | 295 | } |
00bab910 | 296 | |
1da177e4 | 297 | /* assume that no other SBALEs are to follow in the same SBAL */ |
564e1c86 | 298 | sbale = zfcp_qdio_sbale_curr(qdio, q_req); |
1da177e4 | 299 | sbale->flags |= SBAL_FLAGS_LAST_ENTRY; |
00bab910 | 300 | |
1da177e4 LT |
301 | return bytes; |
302 | } | |
303 | ||
1da177e4 | 304 | /** |
00bab910 | 305 | * zfcp_qdio_send - set PCI flag in first SBALE and send req to QDIO |
564e1c86 SS |
306 | * @qdio: pointer to struct zfcp_qdio |
307 | * @q_req: pointer to struct zfcp_queue_req | |
00bab910 | 308 | * Returns: 0 on success, error otherwise |
1da177e4 | 309 | */ |
564e1c86 | 310 | int zfcp_qdio_send(struct zfcp_qdio *qdio, struct zfcp_queue_req *q_req) |
1da177e4 | 311 | { |
564e1c86 | 312 | struct zfcp_qdio_queue *req_q = &qdio->req_q; |
42428f74 SS |
313 | int first = q_req->sbal_first; |
314 | int count = q_req->sbal_number; | |
21ddaa53 CS |
315 | int retval; |
316 | unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT; | |
00bab910 | 317 | |
564e1c86 | 318 | zfcp_qdio_account(qdio); |
94506fd1 | 319 | |
564e1c86 SS |
320 | retval = do_QDIO(qdio->adapter->ccw_device, qdio_flags, 0, first, |
321 | count); | |
00bab910 SS |
322 | if (unlikely(retval)) { |
323 | zfcp_qdio_zero_sbals(req_q->sbal, first, count); | |
324 | return retval; | |
325 | } | |
326 | ||
327 | /* account for transferred buffers */ | |
328 | atomic_sub(count, &req_q->count); | |
329 | req_q->first += count; | |
330 | req_q->first %= QDIO_MAX_BUFFERS_PER_Q; | |
00bab910 | 331 | return 0; |
1da177e4 LT |
332 | } |
333 | ||
564e1c86 SS |
334 | |
335 | static void zfcp_qdio_setup_init_data(struct qdio_initialize *id, | |
336 | struct zfcp_qdio *qdio) | |
337 | { | |
338 | ||
339 | id->cdev = qdio->adapter->ccw_device; | |
340 | id->q_format = QDIO_ZFCP_QFMT; | |
341 | memcpy(id->adapter_name, dev_name(&id->cdev->dev), 8); | |
342 | ASCEBC(id->adapter_name, 8); | |
343 | id->qib_param_field_format = 0; | |
344 | id->qib_param_field = NULL; | |
345 | id->input_slib_elements = NULL; | |
346 | id->output_slib_elements = NULL; | |
347 | id->no_input_qs = 1; | |
348 | id->no_output_qs = 1; | |
349 | id->input_handler = zfcp_qdio_int_resp; | |
350 | id->output_handler = zfcp_qdio_int_req; | |
351 | id->int_parm = (unsigned long) qdio; | |
352 | id->flags = QDIO_INBOUND_0COPY_SBALS | | |
353 | QDIO_OUTBOUND_0COPY_SBALS | QDIO_USE_OUTBOUND_PCIS; | |
354 | id->input_sbal_addr_array = (void **) (qdio->resp_q.sbal); | |
355 | id->output_sbal_addr_array = (void **) (qdio->req_q.sbal); | |
356 | ||
357 | } | |
00bab910 SS |
358 | /** |
359 | * zfcp_qdio_allocate - allocate queue memory and initialize QDIO data | |
360 | * @adapter: pointer to struct zfcp_adapter | |
361 | * Returns: -ENOMEM on memory allocation error or return value from | |
362 | * qdio_allocate | |
363 | */ | |
d5a282a1 | 364 | static int zfcp_qdio_allocate(struct zfcp_qdio *qdio) |
00bab910 | 365 | { |
564e1c86 | 366 | struct qdio_initialize init_data; |
00bab910 | 367 | |
564e1c86 SS |
368 | if (zfcp_qdio_buffers_enqueue(qdio->req_q.sbal) || |
369 | zfcp_qdio_buffers_enqueue(qdio->resp_q.sbal)) | |
00bab910 SS |
370 | return -ENOMEM; |
371 | ||
564e1c86 SS |
372 | zfcp_qdio_setup_init_data(&init_data, qdio); |
373 | ||
374 | return qdio_allocate(&init_data); | |
00bab910 SS |
375 | } |
376 | ||
377 | /** | |
378 | * zfcp_close_qdio - close qdio queues for an adapter | |
564e1c86 | 379 | * @qdio: pointer to structure zfcp_qdio |
1da177e4 | 380 | */ |
564e1c86 | 381 | void zfcp_qdio_close(struct zfcp_qdio *qdio) |
1da177e4 | 382 | { |
00bab910 SS |
383 | struct zfcp_qdio_queue *req_q; |
384 | int first, count; | |
385 | ||
564e1c86 | 386 | if (!(atomic_read(&qdio->adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) |
00bab910 SS |
387 | return; |
388 | ||
389 | /* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */ | |
564e1c86 SS |
390 | req_q = &qdio->req_q; |
391 | spin_lock_bh(&qdio->req_q_lock); | |
392 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &qdio->adapter->status); | |
393 | spin_unlock_bh(&qdio->req_q_lock); | |
00bab910 | 394 | |
564e1c86 SS |
395 | qdio_shutdown(qdio->adapter->ccw_device, |
396 | QDIO_FLAG_CLEANUP_USING_CLEAR); | |
00bab910 SS |
397 | |
398 | /* cleanup used outbound sbals */ | |
399 | count = atomic_read(&req_q->count); | |
400 | if (count < QDIO_MAX_BUFFERS_PER_Q) { | |
401 | first = (req_q->first + count) % QDIO_MAX_BUFFERS_PER_Q; | |
402 | count = QDIO_MAX_BUFFERS_PER_Q - count; | |
403 | zfcp_qdio_zero_sbals(req_q->sbal, first, count); | |
1da177e4 | 404 | } |
00bab910 SS |
405 | req_q->first = 0; |
406 | atomic_set(&req_q->count, 0); | |
564e1c86 SS |
407 | qdio->resp_q.first = 0; |
408 | atomic_set(&qdio->resp_q.count, 0); | |
1da177e4 LT |
409 | } |
410 | ||
00bab910 SS |
411 | /** |
412 | * zfcp_qdio_open - prepare and initialize response queue | |
564e1c86 | 413 | * @qdio: pointer to struct zfcp_qdio |
00bab910 SS |
414 | * Returns: 0 on success, otherwise -EIO |
415 | */ | |
564e1c86 | 416 | int zfcp_qdio_open(struct zfcp_qdio *qdio) |
00bab910 | 417 | { |
44cc76f2 | 418 | struct qdio_buffer_element *sbale; |
564e1c86 SS |
419 | struct qdio_initialize init_data; |
420 | struct ccw_device *cdev = qdio->adapter->ccw_device; | |
00bab910 SS |
421 | int cc; |
422 | ||
564e1c86 | 423 | if (atomic_read(&qdio->adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP) |
00bab910 SS |
424 | return -EIO; |
425 | ||
564e1c86 SS |
426 | zfcp_qdio_setup_init_data(&init_data, qdio); |
427 | ||
428 | if (qdio_establish(&init_data)) | |
ff3b24fa | 429 | goto failed_establish; |
00bab910 | 430 | |
564e1c86 | 431 | if (qdio_activate(cdev)) |
00bab910 | 432 | goto failed_qdio; |
00bab910 SS |
433 | |
434 | for (cc = 0; cc < QDIO_MAX_BUFFERS_PER_Q; cc++) { | |
564e1c86 | 435 | sbale = &(qdio->resp_q.sbal[cc]->element[0]); |
00bab910 SS |
436 | sbale->length = 0; |
437 | sbale->flags = SBAL_FLAGS_LAST_ENTRY; | |
438 | sbale->addr = NULL; | |
439 | } | |
440 | ||
564e1c86 | 441 | if (do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT, 0, 0, |
ff3b24fa | 442 | QDIO_MAX_BUFFERS_PER_Q)) |
00bab910 | 443 | goto failed_qdio; |
00bab910 SS |
444 | |
445 | /* set index of first avalable SBALS / number of available SBALS */ | |
564e1c86 SS |
446 | qdio->req_q.first = 0; |
447 | atomic_set(&qdio->req_q.count, QDIO_MAX_BUFFERS_PER_Q); | |
00bab910 SS |
448 | |
449 | return 0; | |
450 | ||
451 | failed_qdio: | |
564e1c86 | 452 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); |
ff3b24fa | 453 | failed_establish: |
564e1c86 | 454 | dev_err(&cdev->dev, |
ff3b24fa | 455 | "Setting up the QDIO connection to the FCP adapter failed\n"); |
00bab910 SS |
456 | return -EIO; |
457 | } | |
d5a282a1 SS |
458 | |
459 | void zfcp_qdio_destroy(struct zfcp_qdio *qdio) | |
460 | { | |
461 | struct qdio_buffer **sbal_req, **sbal_resp; | |
462 | int p; | |
463 | ||
464 | if (!qdio) | |
465 | return; | |
466 | ||
467 | if (qdio->adapter->ccw_device) | |
468 | qdio_free(qdio->adapter->ccw_device); | |
469 | ||
470 | sbal_req = qdio->req_q.sbal; | |
471 | sbal_resp = qdio->resp_q.sbal; | |
472 | ||
473 | for (p = 0; p < QDIO_MAX_BUFFERS_PER_Q; p += QBUFF_PER_PAGE) { | |
474 | free_page((unsigned long) sbal_req[p]); | |
475 | free_page((unsigned long) sbal_resp[p]); | |
476 | } | |
477 | ||
478 | kfree(qdio); | |
479 | } | |
480 | ||
481 | int zfcp_qdio_setup(struct zfcp_adapter *adapter) | |
482 | { | |
483 | struct zfcp_qdio *qdio; | |
484 | ||
485 | qdio = kzalloc(sizeof(struct zfcp_qdio), GFP_KERNEL); | |
486 | if (!qdio) | |
487 | return -ENOMEM; | |
488 | ||
489 | qdio->adapter = adapter; | |
490 | ||
491 | if (zfcp_qdio_allocate(qdio)) { | |
492 | zfcp_qdio_destroy(qdio); | |
493 | return -ENOMEM; | |
494 | } | |
495 | ||
496 | spin_lock_init(&qdio->req_q_lock); | |
497 | spin_lock_init(&qdio->stat_lock); | |
498 | ||
499 | adapter->qdio = qdio; | |
500 | return 0; | |
501 | } | |
502 |