2 * linux/drivers/net/ehea/ehea_qmr.c
4 * eHEA ethernet device driver for IBM eServer System p
6 * (C) Copyright IBM Corp. 2006
9 * Christoph Raisch <raisch@de.ibm.com>
10 * Jan-Bernd Themann <themann@de.ibm.com>
11 * Thomas Klein <tklein@de.ibm.com>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
31 #include "ehea_phyp.h"
34 static void *hw_qpageit_get_inc(struct hw_queue *queue)
36 void *retvalue = hw_qeit_get(queue);
38 queue->current_q_offset += queue->pagesize;
39 if (queue->current_q_offset > queue->queue_length) {
40 queue->current_q_offset -= queue->pagesize;
42 } else if (((u64) retvalue) & (EHEA_PAGESIZE-1)) {
43 ehea_error("not on pageboundary");
49 static int hw_queue_ctor(struct hw_queue *queue, const u32 nr_of_pages,
50 const u32 pagesize, const u32 qe_size)
52 int pages_per_kpage = PAGE_SIZE / pagesize;
55 if ((pagesize > PAGE_SIZE) || (!pages_per_kpage)) {
56 ehea_error("pagesize conflict! kernel pagesize=%d, "
57 "ehea pagesize=%d", (int)PAGE_SIZE, (int)pagesize);
61 queue->queue_length = nr_of_pages * pagesize;
62 queue->queue_pages = kmalloc(nr_of_pages * sizeof(void*), GFP_KERNEL);
63 if (!queue->queue_pages) {
64 ehea_error("no mem for queue_pages");
69 * allocate pages for queue:
70 * outer loop allocates whole kernel pages (page aligned) and
71 * inner loop divides a kernel page into smaller hea queue pages
74 while (i < nr_of_pages) {
75 u8 *kpage = (u8*)get_zeroed_page(GFP_KERNEL);
78 for (k = 0; k < pages_per_kpage && i < nr_of_pages; k++) {
79 (queue->queue_pages)[i] = (struct ehea_page*)kpage;
85 queue->current_q_offset = 0;
86 queue->qe_size = qe_size;
87 queue->pagesize = pagesize;
88 queue->toggle_state = 1;
92 for (i = 0; i < nr_of_pages; i += pages_per_kpage) {
93 if (!(queue->queue_pages)[i])
95 free_page((unsigned long)(queue->queue_pages)[i]);
100 static void hw_queue_dtor(struct hw_queue *queue)
102 int pages_per_kpage = PAGE_SIZE / queue->pagesize;
105 if (!queue || !queue->queue_pages)
108 nr_pages = queue->queue_length / queue->pagesize;
110 for (i = 0; i < nr_pages; i += pages_per_kpage)
111 free_page((unsigned long)(queue->queue_pages)[i]);
113 kfree(queue->queue_pages);
116 struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter,
117 int nr_of_cqe, u64 eq_handle, u32 cq_token)
121 u64 *cq_handle_ref, hret, rpage;
122 u32 act_nr_of_entries, act_pages, counter;
126 cq = kzalloc(sizeof(*cq), GFP_KERNEL);
128 ehea_error("no mem for cq");
132 cq->attr.max_nr_of_cqes = nr_of_cqe;
133 cq->attr.cq_token = cq_token;
134 cq->attr.eq_handle = eq_handle;
136 cq->adapter = adapter;
138 cq_handle_ref = &cq->fw_handle;
139 act_nr_of_entries = 0;
142 hret = ehea_h_alloc_resource_cq(adapter->handle, &cq->attr,
143 &cq->fw_handle, &cq->epas);
144 if (hret != H_SUCCESS) {
145 ehea_error("alloc_resource_cq failed");
149 ret = hw_queue_ctor(&cq->hw_queue, cq->attr.nr_pages,
150 EHEA_PAGESIZE, sizeof(struct ehea_cqe));
154 for (counter = 0; counter < cq->attr.nr_pages; counter++) {
155 vpage = hw_qpageit_get_inc(&cq->hw_queue);
157 ehea_error("hw_qpageit_get_inc failed");
161 rpage = virt_to_abs(vpage);
162 hret = ehea_h_register_rpage(adapter->handle,
163 0, EHEA_CQ_REGISTER_ORIG,
164 cq->fw_handle, rpage, 1);
165 if (hret < H_SUCCESS) {
166 ehea_error("register_rpage_cq failed ehea_cq=%p "
167 "hret=%lx counter=%i act_pages=%i",
168 cq, hret, counter, cq->attr.nr_pages);
172 if (counter == (cq->attr.nr_pages - 1)) {
173 vpage = hw_qpageit_get_inc(&cq->hw_queue);
175 if ((hret != H_SUCCESS) || (vpage)) {
176 ehea_error("registration of pages not "
177 "complete hret=%lx\n", hret);
181 if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
182 ehea_error("CQ: registration of page failed "
189 hw_qeit_reset(&cq->hw_queue);
190 epa = cq->epas.kernel;
191 ehea_reset_cq_ep(cq);
192 ehea_reset_cq_n1(cq);
197 hw_queue_dtor(&cq->hw_queue);
200 ehea_h_free_resource(adapter->handle, cq->fw_handle);
209 int ehea_destroy_cq(struct ehea_cq *cq)
211 u64 adapter_handle, hret;
216 adapter_handle = cq->adapter->handle;
218 /* deregister all previous registered pages */
219 hret = ehea_h_free_resource(adapter_handle, cq->fw_handle);
220 if (hret != H_SUCCESS) {
221 ehea_error("destroy CQ failed");
225 hw_queue_dtor(&cq->hw_queue);
231 struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
232 const enum ehea_eq_type type,
233 const u32 max_nr_of_eqes, const u8 eqe_gen)
240 eq = kzalloc(sizeof(*eq), GFP_KERNEL);
242 ehea_error("no mem for eq");
246 eq->adapter = adapter;
247 eq->attr.type = type;
248 eq->attr.max_nr_of_eqes = max_nr_of_eqes;
249 eq->attr.eqe_gen = eqe_gen;
250 spin_lock_init(&eq->spinlock);
252 hret = ehea_h_alloc_resource_eq(adapter->handle,
253 &eq->attr, &eq->fw_handle);
254 if (hret != H_SUCCESS) {
255 ehea_error("alloc_resource_eq failed");
259 ret = hw_queue_ctor(&eq->hw_queue, eq->attr.nr_pages,
260 EHEA_PAGESIZE, sizeof(struct ehea_eqe));
262 ehea_error("can't allocate eq pages");
266 for (i = 0; i < eq->attr.nr_pages; i++) {
267 vpage = hw_qpageit_get_inc(&eq->hw_queue);
269 ehea_error("hw_qpageit_get_inc failed");
274 rpage = virt_to_abs(vpage);
276 hret = ehea_h_register_rpage(adapter->handle, 0,
277 EHEA_EQ_REGISTER_ORIG,
278 eq->fw_handle, rpage, 1);
280 if (i == (eq->attr.nr_pages - 1)) {
282 vpage = hw_qpageit_get_inc(&eq->hw_queue);
283 if ((hret != H_SUCCESS) || (vpage)) {
287 if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
293 hw_qeit_reset(&eq->hw_queue);
297 hw_queue_dtor(&eq->hw_queue);
300 ehea_h_free_resource(adapter->handle, eq->fw_handle);
307 struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq)
309 struct ehea_eqe *eqe;
312 spin_lock_irqsave(&eq->spinlock, flags);
313 eqe = (struct ehea_eqe*)hw_eqit_eq_get_inc_valid(&eq->hw_queue);
314 spin_unlock_irqrestore(&eq->spinlock, flags);
319 int ehea_destroy_eq(struct ehea_eq *eq)
327 spin_lock_irqsave(&eq->spinlock, flags);
329 hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle);
330 spin_unlock_irqrestore(&eq->spinlock, flags);
332 if (hret != H_SUCCESS) {
333 ehea_error("destroy_eq failed");
337 hw_queue_dtor(&eq->hw_queue);
344 * allocates memory for a queue and registers pages in phyp
346 int ehea_qp_alloc_register(struct ehea_qp *qp, struct hw_queue *hw_queue,
347 int nr_pages, int wqe_size, int act_nr_sges,
348 struct ehea_adapter *adapter, int h_call_q_selector)
354 ret = hw_queue_ctor(hw_queue, nr_pages, EHEA_PAGESIZE, wqe_size);
358 for (cnt = 0; cnt < nr_pages; cnt++) {
359 vpage = hw_qpageit_get_inc(hw_queue);
361 ehea_error("hw_qpageit_get_inc failed");
364 rpage = virt_to_abs(vpage);
365 hret = ehea_h_register_rpage(adapter->handle,
366 0, h_call_q_selector,
367 qp->fw_handle, rpage, 1);
368 if (hret < H_SUCCESS) {
369 ehea_error("register_rpage_qp failed");
373 hw_qeit_reset(hw_queue);
377 hw_queue_dtor(hw_queue);
381 static inline u32 map_wqe_size(u8 wqe_enc_size)
383 return 128 << wqe_enc_size;
386 struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter,
387 u32 pd, struct ehea_qp_init_attr *init_attr)
392 u32 wqe_size_in_bytes_sq, wqe_size_in_bytes_rq1;
393 u32 wqe_size_in_bytes_rq2, wqe_size_in_bytes_rq3;
396 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
398 ehea_error("no mem for qp");
402 qp->adapter = adapter;
404 hret = ehea_h_alloc_resource_qp(adapter->handle, init_attr, pd,
405 &qp->fw_handle, &qp->epas);
406 if (hret != H_SUCCESS) {
407 ehea_error("ehea_h_alloc_resource_qp failed");
411 wqe_size_in_bytes_sq = map_wqe_size(init_attr->act_wqe_size_enc_sq);
412 wqe_size_in_bytes_rq1 = map_wqe_size(init_attr->act_wqe_size_enc_rq1);
413 wqe_size_in_bytes_rq2 = map_wqe_size(init_attr->act_wqe_size_enc_rq2);
414 wqe_size_in_bytes_rq3 = map_wqe_size(init_attr->act_wqe_size_enc_rq3);
416 ret = ehea_qp_alloc_register(qp, &qp->hw_squeue, init_attr->nr_sq_pages,
417 wqe_size_in_bytes_sq,
418 init_attr->act_wqe_size_enc_sq, adapter,
421 ehea_error("can't register for sq ret=%x", ret);
425 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue1,
426 init_attr->nr_rq1_pages,
427 wqe_size_in_bytes_rq1,
428 init_attr->act_wqe_size_enc_rq1,
431 ehea_error("can't register for rq1 ret=%x", ret);
435 if (init_attr->rq_count > 1) {
436 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue2,
437 init_attr->nr_rq2_pages,
438 wqe_size_in_bytes_rq2,
439 init_attr->act_wqe_size_enc_rq2,
442 ehea_error("can't register for rq2 ret=%x", ret);
447 if (init_attr->rq_count > 2) {
448 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue3,
449 init_attr->nr_rq3_pages,
450 wqe_size_in_bytes_rq3,
451 init_attr->act_wqe_size_enc_rq3,
454 ehea_error("can't register for rq3 ret=%x", ret);
459 qp->init_attr = *init_attr;
464 hw_queue_dtor(&qp->hw_rqueue2);
467 hw_queue_dtor(&qp->hw_rqueue1);
470 hw_queue_dtor(&qp->hw_squeue);
473 ehea_h_disable_and_get_hea(adapter->handle, qp->fw_handle);
474 ehea_h_free_resource(adapter->handle, qp->fw_handle);
481 int ehea_destroy_qp(struct ehea_qp *qp)
484 struct ehea_qp_init_attr *qp_attr = &qp->init_attr;
489 hret = ehea_h_free_resource(qp->adapter->handle, qp->fw_handle);
490 if (hret != H_SUCCESS) {
491 ehea_error("destroy_qp failed");
495 hw_queue_dtor(&qp->hw_squeue);
496 hw_queue_dtor(&qp->hw_rqueue1);
498 if (qp_attr->rq_count > 1)
499 hw_queue_dtor(&qp->hw_rqueue2);
500 if (qp_attr->rq_count > 2)
501 hw_queue_dtor(&qp->hw_rqueue3);
507 int ehea_reg_mr_adapter(struct ehea_adapter *adapter)
510 u64 hret, pt_abs, start, end, nr_pages;
511 u32 acc_ctrl = EHEA_MR_ACC_CTRL;
515 end = (u64)high_memory;
516 nr_pages = (end - start) / EHEA_PAGESIZE;
518 pt = kzalloc(PAGE_SIZE, GFP_KERNEL);
520 ehea_error("no mem");
524 pt_abs = virt_to_abs(pt);
526 hret = ehea_h_alloc_resource_mr(adapter->handle, start, end - start,
527 acc_ctrl, adapter->pd,
528 &adapter->mr.handle, &adapter->mr.lkey);
529 if (hret != H_SUCCESS) {
530 ehea_error("alloc_resource_mr failed");
535 adapter->mr.vaddr = KERNELBASE;
538 while (nr_pages > 0) {
540 u64 num_pages = min(nr_pages, (u64)512);
541 for (i = 0; i < num_pages; i++)
542 pt[i] = virt_to_abs((void*)(((u64)start) +
546 hret = ehea_h_register_rpage_mr(adapter->handle,
547 adapter->mr.handle, 0,
550 nr_pages -= num_pages;
552 u64 abs_adr = virt_to_abs((void*)(((u64)start) +
553 (k * EHEA_PAGESIZE)));
555 hret = ehea_h_register_rpage_mr(adapter->handle,
556 adapter->mr.handle, 0,
561 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED)) {
562 ehea_h_free_resource(adapter->handle,
564 ehea_error("register_rpage_mr failed: hret = %lX",
571 if (hret != H_SUCCESS) {
572 ehea_h_free_resource(adapter->handle, adapter->mr.handle);
573 ehea_error("register_rpage failed for last page: hret = %lX",