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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 | ||
5a0e3ad6 | 12 | #include <linux/slab.h> |
1da177e4 | 13 | #include "zfcp_ext.h" |
34c2b712 | 14 | #include "zfcp_qdio.h" |
1da177e4 | 15 | |
5d4e2262 | 16 | #define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer)) |
1da177e4 | 17 | |
00bab910 | 18 | static int zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbal) |
1da177e4 | 19 | { |
b4e44590 | 20 | int pos; |
1da177e4 | 21 | |
b4e44590 | 22 | for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos += QBUFF_PER_PAGE) { |
00bab910 SS |
23 | sbal[pos] = (struct qdio_buffer *) get_zeroed_page(GFP_KERNEL); |
24 | if (!sbal[pos]) | |
b4e44590 | 25 | return -ENOMEM; |
b4e44590 SS |
26 | } |
27 | for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos++) | |
28 | if (pos % QBUFF_PER_PAGE) | |
00bab910 | 29 | sbal[pos] = sbal[pos - 1] + 1; |
b4e44590 | 30 | return 0; |
1da177e4 LT |
31 | } |
32 | ||
564e1c86 | 33 | static void zfcp_qdio_handler_error(struct zfcp_qdio *qdio, char *id) |
1da177e4 | 34 | { |
564e1c86 SS |
35 | struct zfcp_adapter *adapter = qdio->adapter; |
36 | ||
ff3b24fa | 37 | dev_warn(&adapter->ccw_device->dev, "A QDIO problem occurred\n"); |
1da177e4 | 38 | |
00bab910 SS |
39 | zfcp_erp_adapter_reopen(adapter, |
40 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | | |
41 | ZFCP_STATUS_COMMON_ERP_FAILED, id, NULL); | |
1da177e4 LT |
42 | } |
43 | ||
5d4e2262 CS |
44 | static void zfcp_qdio_zero_sbals(struct qdio_buffer *sbal[], int first, int cnt) |
45 | { | |
46 | int i, sbal_idx; | |
47 | ||
48 | for (i = first; i < first + cnt; i++) { | |
49 | sbal_idx = i % QDIO_MAX_BUFFERS_PER_Q; | |
50 | memset(sbal[sbal_idx], 0, sizeof(struct qdio_buffer)); | |
51 | } | |
52 | } | |
53 | ||
94506fd1 | 54 | /* this needs to be called prior to updating the queue fill level */ |
41e05a12 | 55 | static inline void zfcp_qdio_account(struct zfcp_qdio *qdio) |
94506fd1 | 56 | { |
41e05a12 | 57 | unsigned long long now, span; |
94506fd1 MP |
58 | int free, used; |
59 | ||
564e1c86 | 60 | spin_lock(&qdio->stat_lock); |
41e05a12 HC |
61 | now = get_clock_monotonic(); |
62 | span = (now - qdio->req_q_time) >> 12; | |
63 | free = atomic_read(&qdio->req_q.count); | |
94506fd1 | 64 | used = QDIO_MAX_BUFFERS_PER_Q - free; |
564e1c86 SS |
65 | qdio->req_q_util += used * span; |
66 | qdio->req_q_time = now; | |
67 | spin_unlock(&qdio->stat_lock); | |
94506fd1 MP |
68 | } |
69 | ||
779e6e1c JG |
70 | static void zfcp_qdio_int_req(struct ccw_device *cdev, unsigned int qdio_err, |
71 | int queue_no, int first, int count, | |
00bab910 | 72 | unsigned long parm) |
1da177e4 | 73 | { |
564e1c86 SS |
74 | struct zfcp_qdio *qdio = (struct zfcp_qdio *) parm; |
75 | struct zfcp_qdio_queue *queue = &qdio->req_q; | |
1da177e4 | 76 | |
779e6e1c | 77 | if (unlikely(qdio_err)) { |
5771710b SS |
78 | zfcp_dbf_hba_qdio(qdio->adapter->dbf, qdio_err, first, |
79 | count); | |
564e1c86 | 80 | zfcp_qdio_handler_error(qdio, "qdireq1"); |
00bab910 SS |
81 | return; |
82 | } | |
1da177e4 LT |
83 | |
84 | /* cleanup all SBALs being program-owned now */ | |
00bab910 | 85 | zfcp_qdio_zero_sbals(queue->sbal, first, count); |
1da177e4 | 86 | |
564e1c86 | 87 | zfcp_qdio_account(qdio); |
00bab910 | 88 | atomic_add(count, &queue->count); |
564e1c86 | 89 | wake_up(&qdio->req_q_wq); |
1da177e4 LT |
90 | } |
91 | ||
564e1c86 | 92 | static void zfcp_qdio_resp_put_back(struct zfcp_qdio *qdio, int processed) |
1da177e4 | 93 | { |
564e1c86 SS |
94 | struct zfcp_qdio_queue *queue = &qdio->resp_q; |
95 | struct ccw_device *cdev = qdio->adapter->ccw_device; | |
00bab910 SS |
96 | u8 count, start = queue->first; |
97 | unsigned int retval; | |
1da177e4 | 98 | |
00bab910 SS |
99 | count = atomic_read(&queue->count) + processed; |
100 | ||
779e6e1c | 101 | retval = do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT, 0, start, count); |
00bab910 SS |
102 | |
103 | if (unlikely(retval)) { | |
104 | atomic_set(&queue->count, count); | |
452b505c | 105 | zfcp_erp_adapter_reopen(qdio->adapter, 0, "qdrpb_1", NULL); |
00bab910 SS |
106 | } else { |
107 | queue->first += count; | |
108 | queue->first %= QDIO_MAX_BUFFERS_PER_Q; | |
109 | atomic_set(&queue->count, 0); | |
110 | } | |
111 | } | |
112 | ||
779e6e1c JG |
113 | static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int qdio_err, |
114 | int queue_no, int first, int count, | |
00bab910 SS |
115 | unsigned long parm) |
116 | { | |
564e1c86 | 117 | struct zfcp_qdio *qdio = (struct zfcp_qdio *) parm; |
bd63eaf4 | 118 | int sbal_idx, sbal_no; |
00bab910 | 119 | |
779e6e1c | 120 | if (unlikely(qdio_err)) { |
5771710b SS |
121 | zfcp_dbf_hba_qdio(qdio->adapter->dbf, qdio_err, first, |
122 | count); | |
564e1c86 | 123 | zfcp_qdio_handler_error(qdio, "qdires1"); |
00bab910 SS |
124 | return; |
125 | } | |
1da177e4 | 126 | |
1da177e4 LT |
127 | /* |
128 | * go through all SBALs from input queue currently | |
129 | * returned by QDIO layer | |
130 | */ | |
00bab910 SS |
131 | for (sbal_no = 0; sbal_no < count; sbal_no++) { |
132 | sbal_idx = (first + sbal_no) % QDIO_MAX_BUFFERS_PER_Q; | |
1da177e4 | 133 | /* go through all SBALEs of SBAL */ |
564e1c86 | 134 | zfcp_fsf_reqid_check(qdio, sbal_idx); |
1da177e4 LT |
135 | } |
136 | ||
137 | /* | |
138 | * put range of SBALs back to response queue | |
139 | * (including SBALs which have already been free before) | |
140 | */ | |
564e1c86 | 141 | zfcp_qdio_resp_put_back(qdio, count); |
1da177e4 LT |
142 | } |
143 | ||
564e1c86 | 144 | static void zfcp_qdio_sbal_limit(struct zfcp_qdio *qdio, |
34c2b712 | 145 | struct zfcp_qdio_req *q_req, int max_sbals) |
1da177e4 | 146 | { |
564e1c86 | 147 | int count = atomic_read(&qdio->req_q.count); |
1da177e4 | 148 | count = min(count, max_sbals); |
42428f74 | 149 | q_req->sbal_limit = (q_req->sbal_first + count - 1) |
00bab910 | 150 | % QDIO_MAX_BUFFERS_PER_Q; |
1da177e4 LT |
151 | } |
152 | ||
44cc76f2 | 153 | static struct qdio_buffer_element * |
34c2b712 | 154 | zfcp_qdio_sbal_chain(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req, |
42428f74 | 155 | unsigned long sbtype) |
1da177e4 | 156 | { |
44cc76f2 | 157 | struct qdio_buffer_element *sbale; |
1da177e4 LT |
158 | |
159 | /* set last entry flag in current SBALE of current SBAL */ | |
564e1c86 | 160 | sbale = zfcp_qdio_sbale_curr(qdio, q_req); |
1da177e4 LT |
161 | sbale->flags |= SBAL_FLAGS_LAST_ENTRY; |
162 | ||
163 | /* don't exceed last allowed SBAL */ | |
42428f74 | 164 | if (q_req->sbal_last == q_req->sbal_limit) |
1da177e4 LT |
165 | return NULL; |
166 | ||
167 | /* set chaining flag in first SBALE of current SBAL */ | |
564e1c86 | 168 | sbale = zfcp_qdio_sbale_req(qdio, q_req); |
1da177e4 LT |
169 | sbale->flags |= SBAL_FLAGS0_MORE_SBALS; |
170 | ||
171 | /* calculate index of next SBAL */ | |
42428f74 SS |
172 | q_req->sbal_last++; |
173 | q_req->sbal_last %= QDIO_MAX_BUFFERS_PER_Q; | |
1da177e4 LT |
174 | |
175 | /* keep this requests number of SBALs up-to-date */ | |
42428f74 | 176 | q_req->sbal_number++; |
1da177e4 LT |
177 | |
178 | /* start at first SBALE of new SBAL */ | |
42428f74 | 179 | q_req->sbale_curr = 0; |
1da177e4 LT |
180 | |
181 | /* set storage-block type for new SBAL */ | |
564e1c86 | 182 | sbale = zfcp_qdio_sbale_curr(qdio, q_req); |
1da177e4 LT |
183 | sbale->flags |= sbtype; |
184 | ||
185 | return sbale; | |
186 | } | |
187 | ||
44cc76f2 | 188 | static struct qdio_buffer_element * |
34c2b712 | 189 | zfcp_qdio_sbale_next(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req, |
42428f74 | 190 | unsigned int sbtype) |
1da177e4 | 191 | { |
42428f74 | 192 | if (q_req->sbale_curr == ZFCP_LAST_SBALE_PER_SBAL) |
564e1c86 | 193 | return zfcp_qdio_sbal_chain(qdio, q_req, sbtype); |
42428f74 | 194 | q_req->sbale_curr++; |
564e1c86 | 195 | return zfcp_qdio_sbale_curr(qdio, q_req); |
1da177e4 LT |
196 | } |
197 | ||
564e1c86 | 198 | static void zfcp_qdio_undo_sbals(struct zfcp_qdio *qdio, |
34c2b712 | 199 | struct zfcp_qdio_req *q_req) |
1da177e4 | 200 | { |
564e1c86 | 201 | struct qdio_buffer **sbal = qdio->req_q.sbal; |
42428f74 SS |
202 | int first = q_req->sbal_first; |
203 | int last = q_req->sbal_last; | |
00bab910 SS |
204 | int count = (last - first + QDIO_MAX_BUFFERS_PER_Q) % |
205 | QDIO_MAX_BUFFERS_PER_Q + 1; | |
206 | zfcp_qdio_zero_sbals(sbal, first, count); | |
1da177e4 LT |
207 | } |
208 | ||
564e1c86 | 209 | static int zfcp_qdio_fill_sbals(struct zfcp_qdio *qdio, |
34c2b712 | 210 | struct zfcp_qdio_req *q_req, |
00bab910 SS |
211 | unsigned int sbtype, void *start_addr, |
212 | unsigned int total_length) | |
1da177e4 | 213 | { |
44cc76f2 | 214 | struct qdio_buffer_element *sbale; |
1da177e4 LT |
215 | unsigned long remaining, length; |
216 | void *addr; | |
217 | ||
00bab910 | 218 | /* split segment up */ |
1da177e4 LT |
219 | for (addr = start_addr, remaining = total_length; remaining > 0; |
220 | addr += length, remaining -= length) { | |
564e1c86 | 221 | sbale = zfcp_qdio_sbale_next(qdio, q_req, sbtype); |
00bab910 | 222 | if (!sbale) { |
564e1c86 SS |
223 | atomic_inc(&qdio->req_q_full); |
224 | zfcp_qdio_undo_sbals(qdio, q_req); | |
1da177e4 LT |
225 | return -EINVAL; |
226 | } | |
00bab910 SS |
227 | |
228 | /* new piece must not exceed next page boundary */ | |
1da177e4 | 229 | length = min(remaining, |
00bab910 | 230 | (PAGE_SIZE - ((unsigned long)addr & |
1da177e4 | 231 | (PAGE_SIZE - 1)))); |
00bab910 SS |
232 | sbale->addr = addr; |
233 | sbale->length = length; | |
1da177e4 | 234 | } |
00bab910 | 235 | return 0; |
1da177e4 LT |
236 | } |
237 | ||
1da177e4 LT |
238 | /** |
239 | * zfcp_qdio_sbals_from_sg - fill SBALs from scatter-gather list | |
240 | * @fsf_req: request to be processed | |
241 | * @sbtype: SBALE flags | |
242 | * @sg: scatter-gather list | |
1da177e4 | 243 | * @max_sbals: upper bound for number of SBALs to be used |
00bab910 | 244 | * Returns: number of bytes, or error (negativ) |
1da177e4 | 245 | */ |
34c2b712 | 246 | int zfcp_qdio_sbals_from_sg(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req, |
42428f74 SS |
247 | unsigned long sbtype, struct scatterlist *sg, |
248 | int max_sbals) | |
1da177e4 | 249 | { |
44cc76f2 | 250 | struct qdio_buffer_element *sbale; |
00bab910 | 251 | int retval, bytes = 0; |
1da177e4 LT |
252 | |
253 | /* figure out last allowed SBAL */ | |
564e1c86 | 254 | zfcp_qdio_sbal_limit(qdio, q_req, max_sbals); |
1da177e4 | 255 | |
00bab910 | 256 | /* set storage-block type for this request */ |
564e1c86 | 257 | sbale = zfcp_qdio_sbale_req(qdio, q_req); |
1da177e4 LT |
258 | sbale->flags |= sbtype; |
259 | ||
00bab910 | 260 | for (; sg; sg = sg_next(sg)) { |
564e1c86 | 261 | retval = zfcp_qdio_fill_sbals(qdio, q_req, sbtype, |
42428f74 | 262 | sg_virt(sg), sg->length); |
00bab910 SS |
263 | if (retval < 0) |
264 | return retval; | |
265 | bytes += sg->length; | |
1da177e4 | 266 | } |
00bab910 | 267 | |
1da177e4 | 268 | /* assume that no other SBALEs are to follow in the same SBAL */ |
564e1c86 | 269 | sbale = zfcp_qdio_sbale_curr(qdio, q_req); |
1da177e4 | 270 | sbale->flags |= SBAL_FLAGS_LAST_ENTRY; |
00bab910 | 271 | |
1da177e4 LT |
272 | return bytes; |
273 | } | |
274 | ||
1da177e4 | 275 | /** |
00bab910 | 276 | * zfcp_qdio_send - set PCI flag in first SBALE and send req to QDIO |
564e1c86 | 277 | * @qdio: pointer to struct zfcp_qdio |
34c2b712 | 278 | * @q_req: pointer to struct zfcp_qdio_req |
00bab910 | 279 | * Returns: 0 on success, error otherwise |
1da177e4 | 280 | */ |
34c2b712 | 281 | int zfcp_qdio_send(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req) |
1da177e4 | 282 | { |
564e1c86 | 283 | struct zfcp_qdio_queue *req_q = &qdio->req_q; |
42428f74 SS |
284 | int first = q_req->sbal_first; |
285 | int count = q_req->sbal_number; | |
21ddaa53 CS |
286 | int retval; |
287 | unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT; | |
00bab910 | 288 | |
564e1c86 | 289 | zfcp_qdio_account(qdio); |
94506fd1 | 290 | |
564e1c86 SS |
291 | retval = do_QDIO(qdio->adapter->ccw_device, qdio_flags, 0, first, |
292 | count); | |
00bab910 SS |
293 | if (unlikely(retval)) { |
294 | zfcp_qdio_zero_sbals(req_q->sbal, first, count); | |
295 | return retval; | |
296 | } | |
297 | ||
298 | /* account for transferred buffers */ | |
299 | atomic_sub(count, &req_q->count); | |
300 | req_q->first += count; | |
301 | req_q->first %= QDIO_MAX_BUFFERS_PER_Q; | |
00bab910 | 302 | return 0; |
1da177e4 LT |
303 | } |
304 | ||
564e1c86 SS |
305 | |
306 | static void zfcp_qdio_setup_init_data(struct qdio_initialize *id, | |
307 | struct zfcp_qdio *qdio) | |
308 | { | |
309 | ||
310 | id->cdev = qdio->adapter->ccw_device; | |
311 | id->q_format = QDIO_ZFCP_QFMT; | |
312 | memcpy(id->adapter_name, dev_name(&id->cdev->dev), 8); | |
313 | ASCEBC(id->adapter_name, 8); | |
314 | id->qib_param_field_format = 0; | |
315 | id->qib_param_field = NULL; | |
316 | id->input_slib_elements = NULL; | |
317 | id->output_slib_elements = NULL; | |
318 | id->no_input_qs = 1; | |
319 | id->no_output_qs = 1; | |
320 | id->input_handler = zfcp_qdio_int_resp; | |
321 | id->output_handler = zfcp_qdio_int_req; | |
322 | id->int_parm = (unsigned long) qdio; | |
564e1c86 SS |
323 | id->input_sbal_addr_array = (void **) (qdio->resp_q.sbal); |
324 | id->output_sbal_addr_array = (void **) (qdio->req_q.sbal); | |
325 | ||
326 | } | |
00bab910 SS |
327 | /** |
328 | * zfcp_qdio_allocate - allocate queue memory and initialize QDIO data | |
329 | * @adapter: pointer to struct zfcp_adapter | |
330 | * Returns: -ENOMEM on memory allocation error or return value from | |
331 | * qdio_allocate | |
332 | */ | |
d5a282a1 | 333 | static int zfcp_qdio_allocate(struct zfcp_qdio *qdio) |
00bab910 | 334 | { |
564e1c86 | 335 | struct qdio_initialize init_data; |
00bab910 | 336 | |
564e1c86 SS |
337 | if (zfcp_qdio_buffers_enqueue(qdio->req_q.sbal) || |
338 | zfcp_qdio_buffers_enqueue(qdio->resp_q.sbal)) | |
00bab910 SS |
339 | return -ENOMEM; |
340 | ||
564e1c86 SS |
341 | zfcp_qdio_setup_init_data(&init_data, qdio); |
342 | ||
343 | return qdio_allocate(&init_data); | |
00bab910 SS |
344 | } |
345 | ||
346 | /** | |
347 | * zfcp_close_qdio - close qdio queues for an adapter | |
564e1c86 | 348 | * @qdio: pointer to structure zfcp_qdio |
1da177e4 | 349 | */ |
564e1c86 | 350 | void zfcp_qdio_close(struct zfcp_qdio *qdio) |
1da177e4 | 351 | { |
00bab910 SS |
352 | struct zfcp_qdio_queue *req_q; |
353 | int first, count; | |
354 | ||
564e1c86 | 355 | if (!(atomic_read(&qdio->adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) |
00bab910 SS |
356 | return; |
357 | ||
358 | /* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */ | |
564e1c86 SS |
359 | req_q = &qdio->req_q; |
360 | spin_lock_bh(&qdio->req_q_lock); | |
361 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &qdio->adapter->status); | |
362 | spin_unlock_bh(&qdio->req_q_lock); | |
00bab910 | 363 | |
564e1c86 SS |
364 | qdio_shutdown(qdio->adapter->ccw_device, |
365 | QDIO_FLAG_CLEANUP_USING_CLEAR); | |
00bab910 SS |
366 | |
367 | /* cleanup used outbound sbals */ | |
368 | count = atomic_read(&req_q->count); | |
369 | if (count < QDIO_MAX_BUFFERS_PER_Q) { | |
370 | first = (req_q->first + count) % QDIO_MAX_BUFFERS_PER_Q; | |
371 | count = QDIO_MAX_BUFFERS_PER_Q - count; | |
372 | zfcp_qdio_zero_sbals(req_q->sbal, first, count); | |
1da177e4 | 373 | } |
00bab910 SS |
374 | req_q->first = 0; |
375 | atomic_set(&req_q->count, 0); | |
564e1c86 SS |
376 | qdio->resp_q.first = 0; |
377 | atomic_set(&qdio->resp_q.count, 0); | |
1da177e4 LT |
378 | } |
379 | ||
00bab910 SS |
380 | /** |
381 | * zfcp_qdio_open - prepare and initialize response queue | |
564e1c86 | 382 | * @qdio: pointer to struct zfcp_qdio |
00bab910 SS |
383 | * Returns: 0 on success, otherwise -EIO |
384 | */ | |
564e1c86 | 385 | int zfcp_qdio_open(struct zfcp_qdio *qdio) |
00bab910 | 386 | { |
44cc76f2 | 387 | struct qdio_buffer_element *sbale; |
564e1c86 SS |
388 | struct qdio_initialize init_data; |
389 | struct ccw_device *cdev = qdio->adapter->ccw_device; | |
00bab910 SS |
390 | int cc; |
391 | ||
564e1c86 | 392 | if (atomic_read(&qdio->adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP) |
00bab910 SS |
393 | return -EIO; |
394 | ||
564e1c86 SS |
395 | zfcp_qdio_setup_init_data(&init_data, qdio); |
396 | ||
397 | if (qdio_establish(&init_data)) | |
ff3b24fa | 398 | goto failed_establish; |
00bab910 | 399 | |
564e1c86 | 400 | if (qdio_activate(cdev)) |
00bab910 | 401 | goto failed_qdio; |
00bab910 SS |
402 | |
403 | for (cc = 0; cc < QDIO_MAX_BUFFERS_PER_Q; cc++) { | |
564e1c86 | 404 | sbale = &(qdio->resp_q.sbal[cc]->element[0]); |
00bab910 SS |
405 | sbale->length = 0; |
406 | sbale->flags = SBAL_FLAGS_LAST_ENTRY; | |
407 | sbale->addr = NULL; | |
408 | } | |
409 | ||
564e1c86 | 410 | if (do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT, 0, 0, |
ff3b24fa | 411 | QDIO_MAX_BUFFERS_PER_Q)) |
00bab910 | 412 | goto failed_qdio; |
00bab910 SS |
413 | |
414 | /* set index of first avalable SBALS / number of available SBALS */ | |
564e1c86 SS |
415 | qdio->req_q.first = 0; |
416 | atomic_set(&qdio->req_q.count, QDIO_MAX_BUFFERS_PER_Q); | |
00bab910 SS |
417 | |
418 | return 0; | |
419 | ||
420 | failed_qdio: | |
564e1c86 | 421 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); |
ff3b24fa | 422 | failed_establish: |
564e1c86 | 423 | dev_err(&cdev->dev, |
ff3b24fa | 424 | "Setting up the QDIO connection to the FCP adapter failed\n"); |
00bab910 SS |
425 | return -EIO; |
426 | } | |
d5a282a1 SS |
427 | |
428 | void zfcp_qdio_destroy(struct zfcp_qdio *qdio) | |
429 | { | |
430 | struct qdio_buffer **sbal_req, **sbal_resp; | |
431 | int p; | |
432 | ||
433 | if (!qdio) | |
434 | return; | |
435 | ||
436 | if (qdio->adapter->ccw_device) | |
437 | qdio_free(qdio->adapter->ccw_device); | |
438 | ||
439 | sbal_req = qdio->req_q.sbal; | |
440 | sbal_resp = qdio->resp_q.sbal; | |
441 | ||
442 | for (p = 0; p < QDIO_MAX_BUFFERS_PER_Q; p += QBUFF_PER_PAGE) { | |
443 | free_page((unsigned long) sbal_req[p]); | |
444 | free_page((unsigned long) sbal_resp[p]); | |
445 | } | |
446 | ||
447 | kfree(qdio); | |
448 | } | |
449 | ||
450 | int zfcp_qdio_setup(struct zfcp_adapter *adapter) | |
451 | { | |
452 | struct zfcp_qdio *qdio; | |
453 | ||
454 | qdio = kzalloc(sizeof(struct zfcp_qdio), GFP_KERNEL); | |
455 | if (!qdio) | |
456 | return -ENOMEM; | |
457 | ||
458 | qdio->adapter = adapter; | |
459 | ||
460 | if (zfcp_qdio_allocate(qdio)) { | |
461 | zfcp_qdio_destroy(qdio); | |
462 | return -ENOMEM; | |
463 | } | |
464 | ||
465 | spin_lock_init(&qdio->req_q_lock); | |
466 | spin_lock_init(&qdio->stat_lock); | |
467 | ||
468 | adapter->qdio = qdio; | |
469 | return 0; | |
470 | } | |
471 |