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46#include <linux/slab.h>
47
48#include "ehca_iverbs.h"
49#include "ehca_classes.h"
50#include "ehca_irq.h"
51#include "hcp_if.h"
52
53static struct kmem_cache *cq_cache;
54
55int ehca_cq_assign_qp(struct ehca_cq *cq, struct ehca_qp *qp)
56{
57 unsigned int qp_num = qp->real_qp_num;
58 unsigned int key = qp_num & (QP_HASHTAB_LEN-1);
59 unsigned long flags;
60
61 spin_lock_irqsave(&cq->spinlock, flags);
62 hlist_add_head(&qp->list_entries, &cq->qp_hashtab[key]);
63 spin_unlock_irqrestore(&cq->spinlock, flags);
64
65 ehca_dbg(cq->ib_cq.device, "cq_num=%x real_qp_num=%x",
66 cq->cq_number, qp_num);
67
68 return 0;
69}
70
71int ehca_cq_unassign_qp(struct ehca_cq *cq, unsigned int real_qp_num)
72{
73 int ret = -EINVAL;
74 unsigned int key = real_qp_num & (QP_HASHTAB_LEN-1);
75 struct hlist_node *iter;
76 struct ehca_qp *qp;
77 unsigned long flags;
78
79 spin_lock_irqsave(&cq->spinlock, flags);
80 hlist_for_each(iter, &cq->qp_hashtab[key]) {
81 qp = hlist_entry(iter, struct ehca_qp, list_entries);
82 if (qp->real_qp_num == real_qp_num) {
83 hlist_del(iter);
84 ehca_dbg(cq->ib_cq.device,
85 "removed qp from cq .cq_num=%x real_qp_num=%x",
86 cq->cq_number, real_qp_num);
87 ret = 0;
88 break;
89 }
90 }
91 spin_unlock_irqrestore(&cq->spinlock, flags);
92 if (ret)
93 ehca_err(cq->ib_cq.device,
94 "qp not found cq_num=%x real_qp_num=%x",
95 cq->cq_number, real_qp_num);
96
97 return ret;
98}
99
100struct ehca_qp *ehca_cq_get_qp(struct ehca_cq *cq, int real_qp_num)
101{
102 struct ehca_qp *ret = NULL;
103 unsigned int key = real_qp_num & (QP_HASHTAB_LEN-1);
104 struct hlist_node *iter;
105 struct ehca_qp *qp;
106 hlist_for_each(iter, &cq->qp_hashtab[key]) {
107 qp = hlist_entry(iter, struct ehca_qp, list_entries);
108 if (qp->real_qp_num == real_qp_num) {
109 ret = qp;
110 break;
111 }
112 }
113 return ret;
114}
115
116struct ib_cq *ehca_create_cq(struct ib_device *device, int cqe, int comp_vector,
117 struct ib_ucontext *context,
118 struct ib_udata *udata)
119{
120 static const u32 additional_cqe = 20;
121 struct ib_cq *cq;
122 struct ehca_cq *my_cq;
123 struct ehca_shca *shca =
124 container_of(device, struct ehca_shca, ib_device);
125 struct ipz_adapter_handle adapter_handle;
126 struct ehca_alloc_cq_parms param;
127 struct h_galpa gal;
128 void *vpage;
129 u32 counter;
130 u64 rpage, cqx_fec, h_ret;
131 int ipz_rc, ret, i;
132 unsigned long flags;
133
134 if (cqe >= 0xFFFFFFFF - 64 - additional_cqe)
135 return ERR_PTR(-EINVAL);
136
137 if (!atomic_add_unless(&shca->num_cqs, 1, shca->max_num_cqs)) {
138 ehca_err(device, "Unable to create CQ, max number of %i "
139 "CQs reached.", shca->max_num_cqs);
140 ehca_err(device, "To increase the maximum number of CQs "
141 "use the number_of_cqs module parameter.\n");
142 return ERR_PTR(-ENOSPC);
143 }
144
145 my_cq = kmem_cache_zalloc(cq_cache, GFP_KERNEL);
146 if (!my_cq) {
147 ehca_err(device, "Out of memory for ehca_cq struct device=%p",
148 device);
149 atomic_dec(&shca->num_cqs);
150 return ERR_PTR(-ENOMEM);
151 }
152
153 memset(¶m, 0, sizeof(struct ehca_alloc_cq_parms));
154
155 spin_lock_init(&my_cq->spinlock);
156 spin_lock_init(&my_cq->cb_lock);
157 spin_lock_init(&my_cq->task_lock);
158 atomic_set(&my_cq->nr_events, 0);
159 init_waitqueue_head(&my_cq->wait_completion);
160
161 cq = &my_cq->ib_cq;
162
163 adapter_handle = shca->ipz_hca_handle;
164 param.eq_handle = shca->eq.ipz_eq_handle;
165
166 do {
167 if (!idr_pre_get(&ehca_cq_idr, GFP_KERNEL)) {
168 cq = ERR_PTR(-ENOMEM);
169 ehca_err(device, "Can't reserve idr nr. device=%p",
170 device);
171 goto create_cq_exit1;
172 }
173
174 write_lock_irqsave(&ehca_cq_idr_lock, flags);
175 ret = idr_get_new(&ehca_cq_idr, my_cq, &my_cq->token);
176 write_unlock_irqrestore(&ehca_cq_idr_lock, flags);
177 } while (ret == -EAGAIN);
178
179 if (ret) {
180 cq = ERR_PTR(-ENOMEM);
181 ehca_err(device, "Can't allocate new idr entry. device=%p",
182 device);
183 goto create_cq_exit1;
184 }
185
186 if (my_cq->token > 0x1FFFFFF) {
187 cq = ERR_PTR(-ENOMEM);
188 ehca_err(device, "Invalid number of cq. device=%p", device);
189 goto create_cq_exit2;
190 }
191
192
193
194
195
196 param.nr_cqe = cqe + additional_cqe;
197 h_ret = hipz_h_alloc_resource_cq(adapter_handle, my_cq, ¶m);
198
199 if (h_ret != H_SUCCESS) {
200 ehca_err(device, "hipz_h_alloc_resource_cq() failed "
201 "h_ret=%lli device=%p", h_ret, device);
202 cq = ERR_PTR(ehca2ib_return_code(h_ret));
203 goto create_cq_exit2;
204 }
205
206 ipz_rc = ipz_queue_ctor(NULL, &my_cq->ipz_queue, param.act_pages,
207 EHCA_PAGESIZE, sizeof(struct ehca_cqe), 0, 0);
208 if (!ipz_rc) {
209 ehca_err(device, "ipz_queue_ctor() failed ipz_rc=%i device=%p",
210 ipz_rc, device);
211 cq = ERR_PTR(-EINVAL);
212 goto create_cq_exit3;
213 }
214
215 for (counter = 0; counter < param.act_pages; counter++) {
216 vpage = ipz_qpageit_get_inc(&my_cq->ipz_queue);
217 if (!vpage) {
218 ehca_err(device, "ipz_qpageit_get_inc() "
219 "returns NULL device=%p", device);
220 cq = ERR_PTR(-EAGAIN);
221 goto create_cq_exit4;
222 }
223 rpage = virt_to_abs(vpage);
224
225 h_ret = hipz_h_register_rpage_cq(adapter_handle,
226 my_cq->ipz_cq_handle,
227 &my_cq->pf,
228 0,
229 0,
230 rpage,
231 1,
232 my_cq->galpas.
233 kernel);
234
235 if (h_ret < H_SUCCESS) {
236 ehca_err(device, "hipz_h_register_rpage_cq() failed "
237 "ehca_cq=%p cq_num=%x h_ret=%lli counter=%i "
238 "act_pages=%i", my_cq, my_cq->cq_number,
239 h_ret, counter, param.act_pages);
240 cq = ERR_PTR(-EINVAL);
241 goto create_cq_exit4;
242 }
243
244 if (counter == (param.act_pages - 1)) {
245 vpage = ipz_qpageit_get_inc(&my_cq->ipz_queue);
246 if ((h_ret != H_SUCCESS) || vpage) {
247 ehca_err(device, "Registration of pages not "
248 "complete ehca_cq=%p cq_num=%x "
249 "h_ret=%lli", my_cq, my_cq->cq_number,
250 h_ret);
251 cq = ERR_PTR(-EAGAIN);
252 goto create_cq_exit4;
253 }
254 } else {
255 if (h_ret != H_PAGE_REGISTERED) {
256 ehca_err(device, "Registration of page failed "
257 "ehca_cq=%p cq_num=%x h_ret=%lli "
258 "counter=%i act_pages=%i",
259 my_cq, my_cq->cq_number,
260 h_ret, counter, param.act_pages);
261 cq = ERR_PTR(-ENOMEM);
262 goto create_cq_exit4;
263 }
264 }
265 }
266
267 ipz_qeit_reset(&my_cq->ipz_queue);
268
269 gal = my_cq->galpas.kernel;
270 cqx_fec = hipz_galpa_load(gal, CQTEMM_OFFSET(cqx_fec));
271 ehca_dbg(device, "ehca_cq=%p cq_num=%x CQX_FEC=%llx",
272 my_cq, my_cq->cq_number, cqx_fec);
273
274 my_cq->ib_cq.cqe = my_cq->nr_of_entries =
275 param.act_nr_of_entries - additional_cqe;
276 my_cq->cq_number = (my_cq->ipz_cq_handle.handle) & 0xffff;
277
278 for (i = 0; i < QP_HASHTAB_LEN; i++)
279 INIT_HLIST_HEAD(&my_cq->qp_hashtab[i]);
280
281 INIT_LIST_HEAD(&my_cq->sqp_err_list);
282 INIT_LIST_HEAD(&my_cq->rqp_err_list);
283
284 if (context) {
285 struct ipz_queue *ipz_queue = &my_cq->ipz_queue;
286 struct ehca_create_cq_resp resp;
287 memset(&resp, 0, sizeof(resp));
288 resp.cq_number = my_cq->cq_number;
289 resp.token = my_cq->token;
290 resp.ipz_queue.qe_size = ipz_queue->qe_size;
291 resp.ipz_queue.act_nr_of_sg = ipz_queue->act_nr_of_sg;
292 resp.ipz_queue.queue_length = ipz_queue->queue_length;
293 resp.ipz_queue.pagesize = ipz_queue->pagesize;
294 resp.ipz_queue.toggle_state = ipz_queue->toggle_state;
295 resp.fw_handle_ofs = (u32)
296 (my_cq->galpas.user.fw_handle & (PAGE_SIZE - 1));
297 if (ib_copy_to_udata(udata, &resp, sizeof(resp))) {
298 ehca_err(device, "Copy to udata failed.");
299 goto create_cq_exit4;
300 }
301 }
302
303 return cq;
304
305create_cq_exit4:
306 ipz_queue_dtor(NULL, &my_cq->ipz_queue);
307
308create_cq_exit3:
309 h_ret = hipz_h_destroy_cq(adapter_handle, my_cq, 1);
310 if (h_ret != H_SUCCESS)
311 ehca_err(device, "hipz_h_destroy_cq() failed ehca_cq=%p "
312 "cq_num=%x h_ret=%lli", my_cq, my_cq->cq_number, h_ret);
313
314create_cq_exit2:
315 write_lock_irqsave(&ehca_cq_idr_lock, flags);
316 idr_remove(&ehca_cq_idr, my_cq->token);
317 write_unlock_irqrestore(&ehca_cq_idr_lock, flags);
318
319create_cq_exit1:
320 kmem_cache_free(cq_cache, my_cq);
321
322 atomic_dec(&shca->num_cqs);
323 return cq;
324}
325
326int ehca_destroy_cq(struct ib_cq *cq)
327{
328 u64 h_ret;
329 struct ehca_cq *my_cq = container_of(cq, struct ehca_cq, ib_cq);
330 int cq_num = my_cq->cq_number;
331 struct ib_device *device = cq->device;
332 struct ehca_shca *shca = container_of(device, struct ehca_shca,
333 ib_device);
334 struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
335 unsigned long flags;
336
337 if (cq->uobject) {
338 if (my_cq->mm_count_galpa || my_cq->mm_count_queue) {
339 ehca_err(device, "Resources still referenced in "
340 "user space cq_num=%x", my_cq->cq_number);
341 return -EINVAL;
342 }
343 }
344
345
346
347
348
349 write_lock_irqsave(&ehca_cq_idr_lock, flags);
350 idr_remove(&ehca_cq_idr, my_cq->token);
351 write_unlock_irqrestore(&ehca_cq_idr_lock, flags);
352
353
354 wait_event(my_cq->wait_completion, !atomic_read(&my_cq->nr_events));
355
356
357 h_ret = hipz_h_destroy_cq(adapter_handle, my_cq, 0);
358 if (h_ret == H_R_STATE) {
359
360 ehca_dbg(device, "ehca_cq=%p cq_num=%x resource=%llx in err "
361 "state. Try to delete it forcibly.",
362 my_cq, cq_num, my_cq->ipz_cq_handle.handle);
363 ehca_error_data(shca, my_cq, my_cq->ipz_cq_handle.handle);
364 h_ret = hipz_h_destroy_cq(adapter_handle, my_cq, 1);
365 if (h_ret == H_SUCCESS)
366 ehca_dbg(device, "cq_num=%x deleted successfully.",
367 cq_num);
368 }
369 if (h_ret != H_SUCCESS) {
370 ehca_err(device, "hipz_h_destroy_cq() failed h_ret=%lli "
371 "ehca_cq=%p cq_num=%x", h_ret, my_cq, cq_num);
372 return ehca2ib_return_code(h_ret);
373 }
374 ipz_queue_dtor(NULL, &my_cq->ipz_queue);
375 kmem_cache_free(cq_cache, my_cq);
376
377 atomic_dec(&shca->num_cqs);
378 return 0;
379}
380
381int ehca_resize_cq(struct ib_cq *cq, int cqe, struct ib_udata *udata)
382{
383
384 ehca_err(cq->device, "not implemented yet");
385
386 return -EFAULT;
387}
388
389int ehca_init_cq_cache(void)
390{
391 cq_cache = kmem_cache_create("ehca_cache_cq",
392 sizeof(struct ehca_cq), 0,
393 SLAB_HWCACHE_ALIGN,
394 NULL);
395 if (!cq_cache)
396 return -ENOMEM;
397 return 0;
398}
399
400void ehca_cleanup_cq_cache(void)
401{
402 if (cq_cache)
403 kmem_cache_destroy(cq_cache);
404}
405
