2 * linux/drivers/net/ethernet/ibm/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.
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
32 #include <linux/slab.h>
34 #include "ehea_phyp.h"
37 static struct ehea_bmap *ehea_bmap;
39 static void *hw_qpageit_get_inc(struct hw_queue *queue)
41 void *retvalue = hw_qeit_get(queue);
43 queue->current_q_offset += queue->pagesize;
44 if (queue->current_q_offset > queue->queue_length) {
45 queue->current_q_offset -= queue->pagesize;
47 } else if (((u64) retvalue) & (EHEA_PAGESIZE-1)) {
48 pr_err("not on pageboundary\n");
54 static int hw_queue_ctor(struct hw_queue *queue, const u32 nr_of_pages,
55 const u32 pagesize, const u32 qe_size)
57 int pages_per_kpage = PAGE_SIZE / pagesize;
60 if ((pagesize > PAGE_SIZE) || (!pages_per_kpage)) {
61 pr_err("pagesize conflict! kernel pagesize=%d, ehea pagesize=%d\n",
62 (int)PAGE_SIZE, (int)pagesize);
66 queue->queue_length = nr_of_pages * pagesize;
67 queue->queue_pages = kmalloc(nr_of_pages * sizeof(void *), GFP_KERNEL);
68 if (!queue->queue_pages) {
69 pr_err("no mem for queue_pages\n");
74 * allocate pages for queue:
75 * outer loop allocates whole kernel pages (page aligned) and
76 * inner loop divides a kernel page into smaller hea queue pages
79 while (i < nr_of_pages) {
80 u8 *kpage = (u8 *)get_zeroed_page(GFP_KERNEL);
83 for (k = 0; k < pages_per_kpage && i < nr_of_pages; k++) {
84 (queue->queue_pages)[i] = (struct ehea_page *)kpage;
90 queue->current_q_offset = 0;
91 queue->qe_size = qe_size;
92 queue->pagesize = pagesize;
93 queue->toggle_state = 1;
97 for (i = 0; i < nr_of_pages; i += pages_per_kpage) {
98 if (!(queue->queue_pages)[i])
100 free_page((unsigned long)(queue->queue_pages)[i]);
105 static void hw_queue_dtor(struct hw_queue *queue)
107 int pages_per_kpage = PAGE_SIZE / queue->pagesize;
110 if (!queue || !queue->queue_pages)
113 nr_pages = queue->queue_length / queue->pagesize;
115 for (i = 0; i < nr_pages; i += pages_per_kpage)
116 free_page((unsigned long)(queue->queue_pages)[i]);
118 kfree(queue->queue_pages);
121 struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter,
122 int nr_of_cqe, u64 eq_handle, u32 cq_token)
126 u64 *cq_handle_ref, hret, rpage;
127 u32 act_nr_of_entries, act_pages, counter;
131 cq = kzalloc(sizeof(*cq), GFP_KERNEL);
133 pr_err("no mem for cq\n");
137 cq->attr.max_nr_of_cqes = nr_of_cqe;
138 cq->attr.cq_token = cq_token;
139 cq->attr.eq_handle = eq_handle;
141 cq->adapter = adapter;
143 cq_handle_ref = &cq->fw_handle;
144 act_nr_of_entries = 0;
147 hret = ehea_h_alloc_resource_cq(adapter->handle, &cq->attr,
148 &cq->fw_handle, &cq->epas);
149 if (hret != H_SUCCESS) {
150 pr_err("alloc_resource_cq failed\n");
154 ret = hw_queue_ctor(&cq->hw_queue, cq->attr.nr_pages,
155 EHEA_PAGESIZE, sizeof(struct ehea_cqe));
159 for (counter = 0; counter < cq->attr.nr_pages; counter++) {
160 vpage = hw_qpageit_get_inc(&cq->hw_queue);
162 pr_err("hw_qpageit_get_inc failed\n");
166 rpage = virt_to_abs(vpage);
167 hret = ehea_h_register_rpage(adapter->handle,
168 0, EHEA_CQ_REGISTER_ORIG,
169 cq->fw_handle, rpage, 1);
170 if (hret < H_SUCCESS) {
171 pr_err("register_rpage_cq failed ehea_cq=%p hret=%llx counter=%i act_pages=%i\n",
172 cq, hret, counter, cq->attr.nr_pages);
176 if (counter == (cq->attr.nr_pages - 1)) {
177 vpage = hw_qpageit_get_inc(&cq->hw_queue);
179 if ((hret != H_SUCCESS) || (vpage)) {
180 pr_err("registration of pages not complete hret=%llx\n",
185 if (hret != H_PAGE_REGISTERED) {
186 pr_err("CQ: registration of page failed hret=%llx\n",
193 hw_qeit_reset(&cq->hw_queue);
194 epa = cq->epas.kernel;
195 ehea_reset_cq_ep(cq);
196 ehea_reset_cq_n1(cq);
201 hw_queue_dtor(&cq->hw_queue);
204 ehea_h_free_resource(adapter->handle, cq->fw_handle, FORCE_FREE);
213 static u64 ehea_destroy_cq_res(struct ehea_cq *cq, u64 force)
216 u64 adapter_handle = cq->adapter->handle;
218 /* deregister all previous registered pages */
219 hret = ehea_h_free_resource(adapter_handle, cq->fw_handle, force);
220 if (hret != H_SUCCESS)
223 hw_queue_dtor(&cq->hw_queue);
229 int ehea_destroy_cq(struct ehea_cq *cq)
235 hcp_epas_dtor(&cq->epas);
236 hret = ehea_destroy_cq_res(cq, NORMAL_FREE);
237 if (hret == H_R_STATE) {
238 ehea_error_data(cq->adapter, cq->fw_handle, &aer, &aerr);
239 hret = ehea_destroy_cq_res(cq, FORCE_FREE);
242 if (hret != H_SUCCESS) {
243 pr_err("destroy CQ failed\n");
250 struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
251 const enum ehea_eq_type type,
252 const u32 max_nr_of_eqes, const u8 eqe_gen)
259 eq = kzalloc(sizeof(*eq), GFP_KERNEL);
261 pr_err("no mem for eq\n");
265 eq->adapter = adapter;
266 eq->attr.type = type;
267 eq->attr.max_nr_of_eqes = max_nr_of_eqes;
268 eq->attr.eqe_gen = eqe_gen;
269 spin_lock_init(&eq->spinlock);
271 hret = ehea_h_alloc_resource_eq(adapter->handle,
272 &eq->attr, &eq->fw_handle);
273 if (hret != H_SUCCESS) {
274 pr_err("alloc_resource_eq failed\n");
278 ret = hw_queue_ctor(&eq->hw_queue, eq->attr.nr_pages,
279 EHEA_PAGESIZE, sizeof(struct ehea_eqe));
281 pr_err("can't allocate eq pages\n");
285 for (i = 0; i < eq->attr.nr_pages; i++) {
286 vpage = hw_qpageit_get_inc(&eq->hw_queue);
288 pr_err("hw_qpageit_get_inc failed\n");
293 rpage = virt_to_abs(vpage);
295 hret = ehea_h_register_rpage(adapter->handle, 0,
296 EHEA_EQ_REGISTER_ORIG,
297 eq->fw_handle, rpage, 1);
299 if (i == (eq->attr.nr_pages - 1)) {
301 vpage = hw_qpageit_get_inc(&eq->hw_queue);
302 if ((hret != H_SUCCESS) || (vpage))
306 if (hret != H_PAGE_REGISTERED)
312 hw_qeit_reset(&eq->hw_queue);
316 hw_queue_dtor(&eq->hw_queue);
319 ehea_h_free_resource(adapter->handle, eq->fw_handle, FORCE_FREE);
326 struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq)
328 struct ehea_eqe *eqe;
331 spin_lock_irqsave(&eq->spinlock, flags);
332 eqe = hw_eqit_eq_get_inc_valid(&eq->hw_queue);
333 spin_unlock_irqrestore(&eq->spinlock, flags);
338 static u64 ehea_destroy_eq_res(struct ehea_eq *eq, u64 force)
343 spin_lock_irqsave(&eq->spinlock, flags);
345 hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle, force);
346 spin_unlock_irqrestore(&eq->spinlock, flags);
348 if (hret != H_SUCCESS)
351 hw_queue_dtor(&eq->hw_queue);
357 int ehea_destroy_eq(struct ehea_eq *eq)
363 hcp_epas_dtor(&eq->epas);
365 hret = ehea_destroy_eq_res(eq, NORMAL_FREE);
366 if (hret == H_R_STATE) {
367 ehea_error_data(eq->adapter, eq->fw_handle, &aer, &aerr);
368 hret = ehea_destroy_eq_res(eq, FORCE_FREE);
371 if (hret != H_SUCCESS) {
372 pr_err("destroy EQ failed\n");
379 /* allocates memory for a queue and registers pages in phyp */
380 static int ehea_qp_alloc_register(struct ehea_qp *qp, struct hw_queue *hw_queue,
381 int nr_pages, int wqe_size, int act_nr_sges,
382 struct ehea_adapter *adapter, int h_call_q_selector)
388 ret = hw_queue_ctor(hw_queue, nr_pages, EHEA_PAGESIZE, wqe_size);
392 for (cnt = 0; cnt < nr_pages; cnt++) {
393 vpage = hw_qpageit_get_inc(hw_queue);
395 pr_err("hw_qpageit_get_inc failed\n");
398 rpage = virt_to_abs(vpage);
399 hret = ehea_h_register_rpage(adapter->handle,
400 0, h_call_q_selector,
401 qp->fw_handle, rpage, 1);
402 if (hret < H_SUCCESS) {
403 pr_err("register_rpage_qp failed\n");
407 hw_qeit_reset(hw_queue);
411 hw_queue_dtor(hw_queue);
415 static inline u32 map_wqe_size(u8 wqe_enc_size)
417 return 128 << wqe_enc_size;
420 struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter,
421 u32 pd, struct ehea_qp_init_attr *init_attr)
426 u32 wqe_size_in_bytes_sq, wqe_size_in_bytes_rq1;
427 u32 wqe_size_in_bytes_rq2, wqe_size_in_bytes_rq3;
430 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
432 pr_err("no mem for qp\n");
436 qp->adapter = adapter;
438 hret = ehea_h_alloc_resource_qp(adapter->handle, init_attr, pd,
439 &qp->fw_handle, &qp->epas);
440 if (hret != H_SUCCESS) {
441 pr_err("ehea_h_alloc_resource_qp failed\n");
445 wqe_size_in_bytes_sq = map_wqe_size(init_attr->act_wqe_size_enc_sq);
446 wqe_size_in_bytes_rq1 = map_wqe_size(init_attr->act_wqe_size_enc_rq1);
447 wqe_size_in_bytes_rq2 = map_wqe_size(init_attr->act_wqe_size_enc_rq2);
448 wqe_size_in_bytes_rq3 = map_wqe_size(init_attr->act_wqe_size_enc_rq3);
450 ret = ehea_qp_alloc_register(qp, &qp->hw_squeue, init_attr->nr_sq_pages,
451 wqe_size_in_bytes_sq,
452 init_attr->act_wqe_size_enc_sq, adapter,
455 pr_err("can't register for sq ret=%x\n", ret);
459 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue1,
460 init_attr->nr_rq1_pages,
461 wqe_size_in_bytes_rq1,
462 init_attr->act_wqe_size_enc_rq1,
465 pr_err("can't register for rq1 ret=%x\n", ret);
469 if (init_attr->rq_count > 1) {
470 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue2,
471 init_attr->nr_rq2_pages,
472 wqe_size_in_bytes_rq2,
473 init_attr->act_wqe_size_enc_rq2,
476 pr_err("can't register for rq2 ret=%x\n", ret);
481 if (init_attr->rq_count > 2) {
482 ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue3,
483 init_attr->nr_rq3_pages,
484 wqe_size_in_bytes_rq3,
485 init_attr->act_wqe_size_enc_rq3,
488 pr_err("can't register for rq3 ret=%x\n", ret);
493 qp->init_attr = *init_attr;
498 hw_queue_dtor(&qp->hw_rqueue2);
501 hw_queue_dtor(&qp->hw_rqueue1);
504 hw_queue_dtor(&qp->hw_squeue);
507 ehea_h_disable_and_get_hea(adapter->handle, qp->fw_handle);
508 ehea_h_free_resource(adapter->handle, qp->fw_handle, FORCE_FREE);
515 static u64 ehea_destroy_qp_res(struct ehea_qp *qp, u64 force)
518 struct ehea_qp_init_attr *qp_attr = &qp->init_attr;
521 ehea_h_disable_and_get_hea(qp->adapter->handle, qp->fw_handle);
522 hret = ehea_h_free_resource(qp->adapter->handle, qp->fw_handle, force);
523 if (hret != H_SUCCESS)
526 hw_queue_dtor(&qp->hw_squeue);
527 hw_queue_dtor(&qp->hw_rqueue1);
529 if (qp_attr->rq_count > 1)
530 hw_queue_dtor(&qp->hw_rqueue2);
531 if (qp_attr->rq_count > 2)
532 hw_queue_dtor(&qp->hw_rqueue3);
538 int ehea_destroy_qp(struct ehea_qp *qp)
544 hcp_epas_dtor(&qp->epas);
546 hret = ehea_destroy_qp_res(qp, NORMAL_FREE);
547 if (hret == H_R_STATE) {
548 ehea_error_data(qp->adapter, qp->fw_handle, &aer, &aerr);
549 hret = ehea_destroy_qp_res(qp, FORCE_FREE);
552 if (hret != H_SUCCESS) {
553 pr_err("destroy QP failed\n");
560 static inline int ehea_calc_index(unsigned long i, unsigned long s)
562 return (i >> s) & EHEA_INDEX_MASK;
565 static inline int ehea_init_top_bmap(struct ehea_top_bmap *ehea_top_bmap,
568 if (!ehea_top_bmap->dir[dir]) {
569 ehea_top_bmap->dir[dir] =
570 kzalloc(sizeof(struct ehea_dir_bmap), GFP_KERNEL);
571 if (!ehea_top_bmap->dir[dir])
577 static inline int ehea_init_bmap(struct ehea_bmap *ehea_bmap, int top, int dir)
579 if (!ehea_bmap->top[top]) {
580 ehea_bmap->top[top] =
581 kzalloc(sizeof(struct ehea_top_bmap), GFP_KERNEL);
582 if (!ehea_bmap->top[top])
585 return ehea_init_top_bmap(ehea_bmap->top[top], dir);
588 static DEFINE_MUTEX(ehea_busmap_mutex);
589 static unsigned long ehea_mr_len;
591 #define EHEA_BUSMAP_ADD_SECT 1
592 #define EHEA_BUSMAP_REM_SECT 0
594 static void ehea_rebuild_busmap(void)
596 u64 vaddr = EHEA_BUSMAP_START;
599 for (top = 0; top < EHEA_MAP_ENTRIES; top++) {
600 struct ehea_top_bmap *ehea_top;
601 int valid_dir_entries = 0;
603 if (!ehea_bmap->top[top])
605 ehea_top = ehea_bmap->top[top];
606 for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) {
607 struct ehea_dir_bmap *ehea_dir;
608 int valid_entries = 0;
610 if (!ehea_top->dir[dir])
613 ehea_dir = ehea_top->dir[dir];
614 for (idx = 0; idx < EHEA_MAP_ENTRIES; idx++) {
615 if (!ehea_dir->ent[idx])
618 ehea_dir->ent[idx] = vaddr;
619 vaddr += EHEA_SECTSIZE;
621 if (!valid_entries) {
622 ehea_top->dir[dir] = NULL;
626 if (!valid_dir_entries) {
627 ehea_bmap->top[top] = NULL;
633 static int ehea_update_busmap(unsigned long pfn, unsigned long nr_pages, int add)
635 unsigned long i, start_section, end_section;
641 ehea_bmap = kzalloc(sizeof(struct ehea_bmap), GFP_KERNEL);
646 start_section = (pfn * PAGE_SIZE) / EHEA_SECTSIZE;
647 end_section = start_section + ((nr_pages * PAGE_SIZE) / EHEA_SECTSIZE);
648 /* Mark entries as valid or invalid only; address is assigned later */
649 for (i = start_section; i < end_section; i++) {
651 int top = ehea_calc_index(i, EHEA_TOP_INDEX_SHIFT);
652 int dir = ehea_calc_index(i, EHEA_DIR_INDEX_SHIFT);
653 int idx = i & EHEA_INDEX_MASK;
656 int ret = ehea_init_bmap(ehea_bmap, top, dir);
659 flag = 1; /* valid */
660 ehea_mr_len += EHEA_SECTSIZE;
662 if (!ehea_bmap->top[top])
664 if (!ehea_bmap->top[top]->dir[dir])
666 flag = 0; /* invalid */
667 ehea_mr_len -= EHEA_SECTSIZE;
670 ehea_bmap->top[top]->dir[dir]->ent[idx] = flag;
672 ehea_rebuild_busmap(); /* Assign contiguous addresses for mr */
676 int ehea_add_sect_bmap(unsigned long pfn, unsigned long nr_pages)
680 mutex_lock(&ehea_busmap_mutex);
681 ret = ehea_update_busmap(pfn, nr_pages, EHEA_BUSMAP_ADD_SECT);
682 mutex_unlock(&ehea_busmap_mutex);
686 int ehea_rem_sect_bmap(unsigned long pfn, unsigned long nr_pages)
690 mutex_lock(&ehea_busmap_mutex);
691 ret = ehea_update_busmap(pfn, nr_pages, EHEA_BUSMAP_REM_SECT);
692 mutex_unlock(&ehea_busmap_mutex);
696 static int ehea_is_hugepage(unsigned long pfn)
700 if (pfn & EHEA_HUGEPAGE_PFN_MASK)
703 page_order = compound_order(pfn_to_page(pfn));
704 if (page_order + PAGE_SHIFT != EHEA_HUGEPAGESHIFT)
710 static int ehea_create_busmap_callback(unsigned long initial_pfn,
711 unsigned long total_nr_pages, void *arg)
714 unsigned long pfn, start_pfn, end_pfn, nr_pages;
716 if ((total_nr_pages * PAGE_SIZE) < EHEA_HUGEPAGE_SIZE)
717 return ehea_update_busmap(initial_pfn, total_nr_pages,
718 EHEA_BUSMAP_ADD_SECT);
720 /* Given chunk is >= 16GB -> check for hugepages */
721 start_pfn = initial_pfn;
722 end_pfn = initial_pfn + total_nr_pages;
725 while (pfn < end_pfn) {
726 if (ehea_is_hugepage(pfn)) {
727 /* Add mem found in front of the hugepage */
728 nr_pages = pfn - start_pfn;
729 ret = ehea_update_busmap(start_pfn, nr_pages,
730 EHEA_BUSMAP_ADD_SECT);
734 /* Skip the hugepage */
735 pfn += (EHEA_HUGEPAGE_SIZE / PAGE_SIZE);
738 pfn += (EHEA_SECTSIZE / PAGE_SIZE);
741 /* Add mem found behind the hugepage(s) */
742 nr_pages = pfn - start_pfn;
743 return ehea_update_busmap(start_pfn, nr_pages, EHEA_BUSMAP_ADD_SECT);
746 int ehea_create_busmap(void)
750 mutex_lock(&ehea_busmap_mutex);
752 ret = walk_system_ram_range(0, 1ULL << MAX_PHYSMEM_BITS, NULL,
753 ehea_create_busmap_callback);
754 mutex_unlock(&ehea_busmap_mutex);
758 void ehea_destroy_busmap(void)
761 mutex_lock(&ehea_busmap_mutex);
765 for (top = 0; top < EHEA_MAP_ENTRIES; top++) {
766 if (!ehea_bmap->top[top])
769 for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) {
770 if (!ehea_bmap->top[top]->dir[dir])
773 kfree(ehea_bmap->top[top]->dir[dir]);
776 kfree(ehea_bmap->top[top]);
782 mutex_unlock(&ehea_busmap_mutex);
785 u64 ehea_map_vaddr(void *caddr)
788 unsigned long index, offset;
791 return EHEA_INVAL_ADDR;
793 index = virt_to_abs(caddr) >> SECTION_SIZE_BITS;
794 top = (index >> EHEA_TOP_INDEX_SHIFT) & EHEA_INDEX_MASK;
795 if (!ehea_bmap->top[top])
796 return EHEA_INVAL_ADDR;
798 dir = (index >> EHEA_DIR_INDEX_SHIFT) & EHEA_INDEX_MASK;
799 if (!ehea_bmap->top[top]->dir[dir])
800 return EHEA_INVAL_ADDR;
802 idx = index & EHEA_INDEX_MASK;
803 if (!ehea_bmap->top[top]->dir[dir]->ent[idx])
804 return EHEA_INVAL_ADDR;
806 offset = (unsigned long)caddr & (EHEA_SECTSIZE - 1);
807 return ehea_bmap->top[top]->dir[dir]->ent[idx] | offset;
810 static inline void *ehea_calc_sectbase(int top, int dir, int idx)
812 unsigned long ret = idx;
813 ret |= dir << EHEA_DIR_INDEX_SHIFT;
814 ret |= top << EHEA_TOP_INDEX_SHIFT;
815 return abs_to_virt(ret << SECTION_SIZE_BITS);
818 static u64 ehea_reg_mr_section(int top, int dir, int idx, u64 *pt,
819 struct ehea_adapter *adapter,
825 u64 pt_abs = virt_to_abs(pt);
827 void *sectbase = ehea_calc_sectbase(top, dir, idx);
829 for (j = 0; j < (EHEA_PAGES_PER_SECTION / EHEA_MAX_RPAGE); j++) {
831 for (m = 0; m < EHEA_MAX_RPAGE; m++) {
832 pg = sectbase + ((k++) * EHEA_PAGESIZE);
833 pt[m] = virt_to_abs(pg);
835 hret = ehea_h_register_rpage_mr(adapter->handle, mr->handle, 0,
836 0, pt_abs, EHEA_MAX_RPAGE);
838 if ((hret != H_SUCCESS) &&
839 (hret != H_PAGE_REGISTERED)) {
840 ehea_h_free_resource(adapter->handle, mr->handle,
842 pr_err("register_rpage_mr failed\n");
849 static u64 ehea_reg_mr_sections(int top, int dir, u64 *pt,
850 struct ehea_adapter *adapter,
853 u64 hret = H_SUCCESS;
856 for (idx = 0; idx < EHEA_MAP_ENTRIES; idx++) {
857 if (!ehea_bmap->top[top]->dir[dir]->ent[idx])
860 hret = ehea_reg_mr_section(top, dir, idx, pt, adapter, mr);
861 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))
867 static u64 ehea_reg_mr_dir_sections(int top, u64 *pt,
868 struct ehea_adapter *adapter,
871 u64 hret = H_SUCCESS;
874 for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) {
875 if (!ehea_bmap->top[top]->dir[dir])
878 hret = ehea_reg_mr_sections(top, dir, pt, adapter, mr);
879 if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))
885 int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr)
890 u32 acc_ctrl = EHEA_MR_ACC_CTRL;
894 pt = (void *)get_zeroed_page(GFP_KERNEL);
901 hret = ehea_h_alloc_resource_mr(adapter->handle, EHEA_BUSMAP_START,
902 ehea_mr_len, acc_ctrl, adapter->pd,
903 &mr->handle, &mr->lkey);
905 if (hret != H_SUCCESS) {
906 pr_err("alloc_resource_mr failed\n");
912 ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
913 pr_err("no busmap available\n");
918 for (top = 0; top < EHEA_MAP_ENTRIES; top++) {
919 if (!ehea_bmap->top[top])
922 hret = ehea_reg_mr_dir_sections(top, pt, adapter, mr);
923 if((hret != H_PAGE_REGISTERED) && (hret != H_SUCCESS))
927 if (hret != H_SUCCESS) {
928 ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
929 pr_err("registering mr failed\n");
934 mr->vaddr = EHEA_BUSMAP_START;
935 mr->adapter = adapter;
938 free_page((unsigned long)pt);
942 int ehea_rem_mr(struct ehea_mr *mr)
946 if (!mr || !mr->adapter)
949 hret = ehea_h_free_resource(mr->adapter->handle, mr->handle,
951 if (hret != H_SUCCESS) {
952 pr_err("destroy MR failed\n");
959 int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr,
960 struct ehea_mr *shared_mr)
964 hret = ehea_h_register_smr(adapter->handle, old_mr->handle,
965 old_mr->vaddr, EHEA_MR_ACC_CTRL,
966 adapter->pd, shared_mr);
967 if (hret != H_SUCCESS)
970 shared_mr->adapter = adapter;
975 static void print_error_data(u64 *data)
978 u64 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, data[2]);
979 u64 resource = data[1];
981 length = EHEA_BMASK_GET(ERROR_DATA_LENGTH, data[0]);
983 if (length > EHEA_PAGESIZE)
984 length = EHEA_PAGESIZE;
986 if (type == EHEA_AER_RESTYPE_QP)
987 pr_err("QP (resource=%llX) state: AER=0x%llX, AERR=0x%llX, port=%llX\n",
988 resource, data[6], data[12], data[22]);
989 else if (type == EHEA_AER_RESTYPE_CQ)
990 pr_err("CQ (resource=%llX) state: AER=0x%llX\n",
992 else if (type == EHEA_AER_RESTYPE_EQ)
993 pr_err("EQ (resource=%llX) state: AER=0x%llX\n",
996 ehea_dump(data, length, "error data");
999 u64 ehea_error_data(struct ehea_adapter *adapter, u64 res_handle,
1000 u64 *aer, u64 *aerr)
1006 rblock = (void *)get_zeroed_page(GFP_KERNEL);
1008 pr_err("Cannot allocate rblock memory\n");
1012 ret = ehea_h_error_data(adapter->handle, res_handle, rblock);
1014 if (ret == H_SUCCESS) {
1015 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, rblock[2]);
1018 print_error_data(rblock);
1019 } else if (ret == H_R_STATE) {
1020 pr_err("No error data available: %llX\n", res_handle);
1022 pr_err("Error data could not be fetched: %llX\n", res_handle);
1024 free_page((unsigned long)rblock);