diff options
Diffstat (limited to 'drivers/net/ehea/ehea_qmr.c')
| -rw-r--r-- | drivers/net/ehea/ehea_qmr.c | 779 |
1 files changed, 0 insertions, 779 deletions
diff --git a/drivers/net/ehea/ehea_qmr.c b/drivers/net/ehea/ehea_qmr.c deleted file mode 100644 index d522e905f46..00000000000 --- a/drivers/net/ehea/ehea_qmr.c +++ /dev/null @@ -1,779 +0,0 @@ -/* - * linux/drivers/net/ehea/ehea_qmr.c - * - * eHEA ethernet device driver for IBM eServer System p - * - * (C) Copyright IBM Corp. 2006 - * - * Authors: - * Christoph Raisch <raisch@de.ibm.com> - * Jan-Bernd Themann <themann@de.ibm.com> - * Thomas Klein <tklein@de.ibm.com> - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/mm.h> -#include "ehea.h" -#include "ehea_phyp.h" -#include "ehea_qmr.h" - - -struct ehea_busmap ehea_bmap = { 0, 0, NULL }; - - -static void *hw_qpageit_get_inc(struct hw_queue *queue) -{ - void *retvalue = hw_qeit_get(queue); - - queue->current_q_offset += queue->pagesize; - if (queue->current_q_offset > queue->queue_length) { - queue->current_q_offset -= queue->pagesize; - retvalue = NULL; - } else if (((u64) retvalue) & (EHEA_PAGESIZE-1)) { - ehea_error("not on pageboundary"); - retvalue = NULL; - } - return retvalue; -} - -static int hw_queue_ctor(struct hw_queue *queue, const u32 nr_of_pages, - const u32 pagesize, const u32 qe_size) -{ - int pages_per_kpage = PAGE_SIZE / pagesize; - int i, k; - - if ((pagesize > PAGE_SIZE) || (!pages_per_kpage)) { - ehea_error("pagesize conflict! kernel pagesize=%d, " - "ehea pagesize=%d", (int)PAGE_SIZE, (int)pagesize); - return -EINVAL; - } - - queue->queue_length = nr_of_pages * pagesize; - queue->queue_pages = kmalloc(nr_of_pages * sizeof(void *), GFP_KERNEL); - if (!queue->queue_pages) { - ehea_error("no mem for queue_pages"); - return -ENOMEM; - } - - /* - * allocate pages for queue: - * outer loop allocates whole kernel pages (page aligned) and - * inner loop divides a kernel page into smaller hea queue pages - */ - i = 0; - while (i < nr_of_pages) { - u8 *kpage = (u8 *)get_zeroed_page(GFP_KERNEL); - if (!kpage) - goto out_nomem; - for (k = 0; k < pages_per_kpage && i < nr_of_pages; k++) { - (queue->queue_pages)[i] = (struct ehea_page *)kpage; - kpage += pagesize; - i++; - } - } - - queue->current_q_offset = 0; - queue->qe_size = qe_size; - queue->pagesize = pagesize; - queue->toggle_state = 1; - - return 0; -out_nomem: - for (i = 0; i < nr_of_pages; i += pages_per_kpage) { - if (!(queue->queue_pages)[i]) - break; - free_page((unsigned long)(queue->queue_pages)[i]); - } - return -ENOMEM; -} - -static void hw_queue_dtor(struct hw_queue *queue) -{ - int pages_per_kpage = PAGE_SIZE / queue->pagesize; - int i, nr_pages; - - if (!queue || !queue->queue_pages) - return; - - nr_pages = queue->queue_length / queue->pagesize; - - for (i = 0; i < nr_pages; i += pages_per_kpage) - free_page((unsigned long)(queue->queue_pages)[i]); - - kfree(queue->queue_pages); -} - -struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter, - int nr_of_cqe, u64 eq_handle, u32 cq_token) -{ - struct ehea_cq *cq; - struct h_epa epa; - u64 *cq_handle_ref, hret, rpage; - u32 act_nr_of_entries, act_pages, counter; - int ret; - void *vpage; - - cq = kzalloc(sizeof(*cq), GFP_KERNEL); - if (!cq) { - ehea_error("no mem for cq"); - goto out_nomem; - } - - cq->attr.max_nr_of_cqes = nr_of_cqe; - cq->attr.cq_token = cq_token; - cq->attr.eq_handle = eq_handle; - - cq->adapter = adapter; - - cq_handle_ref = &cq->fw_handle; - act_nr_of_entries = 0; - act_pages = 0; - - hret = ehea_h_alloc_resource_cq(adapter->handle, &cq->attr, - &cq->fw_handle, &cq->epas); - if (hret != H_SUCCESS) { - ehea_error("alloc_resource_cq failed"); - goto out_freemem; - } - - ret = hw_queue_ctor(&cq->hw_queue, cq->attr.nr_pages, - EHEA_PAGESIZE, sizeof(struct ehea_cqe)); - if (ret) - goto out_freeres; - - for (counter = 0; counter < cq->attr.nr_pages; counter++) { - vpage = hw_qpageit_get_inc(&cq->hw_queue); - if (!vpage) { - ehea_error("hw_qpageit_get_inc failed"); - goto out_kill_hwq; - } - - rpage = virt_to_abs(vpage); - hret = ehea_h_register_rpage(adapter->handle, - 0, EHEA_CQ_REGISTER_ORIG, - cq->fw_handle, rpage, 1); - if (hret < H_SUCCESS) { - ehea_error("register_rpage_cq failed ehea_cq=%p " - "hret=%lx counter=%i act_pages=%i", - cq, hret, counter, cq->attr.nr_pages); - goto out_kill_hwq; - } - - if (counter == (cq->attr.nr_pages - 1)) { - vpage = hw_qpageit_get_inc(&cq->hw_queue); - - if ((hret != H_SUCCESS) || (vpage)) { - ehea_error("registration of pages not " - "complete hret=%lx\n", hret); - goto out_kill_hwq; - } - } else { - if ((hret != H_PAGE_REGISTERED) || (!vpage)) { - ehea_error("CQ: registration of page failed " - "hret=%lx\n", hret); - goto out_kill_hwq; - } - } - } - - hw_qeit_reset(&cq->hw_queue); - epa = cq->epas.kernel; - ehea_reset_cq_ep(cq); - ehea_reset_cq_n1(cq); - - return cq; - -out_kill_hwq: - hw_queue_dtor(&cq->hw_queue); - -out_freeres: - ehea_h_free_resource(adapter->handle, cq->fw_handle, FORCE_FREE); - -out_freemem: - kfree(cq); - -out_nomem: - return NULL; -} - -u64 ehea_destroy_cq_res(struct ehea_cq *cq, u64 force) -{ - u64 hret; - u64 adapter_handle = cq->adapter->handle; - - /* deregister all previous registered pages */ - hret = ehea_h_free_resource(adapter_handle, cq->fw_handle, force); - if (hret != H_SUCCESS) - return hret; - - hw_queue_dtor(&cq->hw_queue); - kfree(cq); - - return hret; -} - -int ehea_destroy_cq(struct ehea_cq *cq) -{ - u64 hret; - if (!cq) - return 0; - - hcp_epas_dtor(&cq->epas); - hret = ehea_destroy_cq_res(cq, NORMAL_FREE); - if (hret == H_R_STATE) { - ehea_error_data(cq->adapter, cq->fw_handle); - hret = ehea_destroy_cq_res(cq, FORCE_FREE); - } - - if (hret != H_SUCCESS) { - ehea_error("destroy CQ failed"); - return -EIO; - } - - return 0; -} - -struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter, - const enum ehea_eq_type type, - const u32 max_nr_of_eqes, const u8 eqe_gen) -{ - int ret, i; - u64 hret, rpage; - void *vpage; - struct ehea_eq *eq; - - eq = kzalloc(sizeof(*eq), GFP_KERNEL); - if (!eq) { - ehea_error("no mem for eq"); - return NULL; - } - - eq->adapter = adapter; - eq->attr.type = type; - eq->attr.max_nr_of_eqes = max_nr_of_eqes; - eq->attr.eqe_gen = eqe_gen; - spin_lock_init(&eq->spinlock); - - hret = ehea_h_alloc_resource_eq(adapter->handle, - &eq->attr, &eq->fw_handle); - if (hret != H_SUCCESS) { - ehea_error("alloc_resource_eq failed"); - goto out_freemem; - } - - ret = hw_queue_ctor(&eq->hw_queue, eq->attr.nr_pages, - EHEA_PAGESIZE, sizeof(struct ehea_eqe)); - if (ret) { - ehea_error("can't allocate eq pages"); - goto out_freeres; - } - - for (i = 0; i < eq->attr.nr_pages; i++) { - vpage = hw_qpageit_get_inc(&eq->hw_queue); - if (!vpage) { - ehea_error("hw_qpageit_get_inc failed"); - hret = H_RESOURCE; - goto out_kill_hwq; - } - - rpage = virt_to_abs(vpage); - - hret = ehea_h_register_rpage(adapter->handle, 0, - EHEA_EQ_REGISTER_ORIG, - eq->fw_handle, rpage, 1); - - if (i == (eq->attr.nr_pages - 1)) { - /* last page */ - vpage = hw_qpageit_get_inc(&eq->hw_queue); - if ((hret != H_SUCCESS) || (vpage)) - goto out_kill_hwq; - - } else { - if ((hret != H_PAGE_REGISTERED) || (!vpage)) - goto out_kill_hwq; - - } - } - - hw_qeit_reset(&eq->hw_queue); - return eq; - -out_kill_hwq: - hw_queue_dtor(&eq->hw_queue); - -out_freeres: - ehea_h_free_resource(adapter->handle, eq->fw_handle, FORCE_FREE); - -out_freemem: - kfree(eq); - return NULL; -} - -struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq) -{ - struct ehea_eqe *eqe; - unsigned long flags; - - spin_lock_irqsave(&eq->spinlock, flags); - eqe = (struct ehea_eqe *)hw_eqit_eq_get_inc_valid(&eq->hw_queue); - spin_unlock_irqrestore(&eq->spinlock, flags); - - return eqe; -} - -u64 ehea_destroy_eq_res(struct ehea_eq *eq, u64 force) -{ - u64 hret; - unsigned long flags; - - spin_lock_irqsave(&eq->spinlock, flags); - - hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle, force); - spin_unlock_irqrestore(&eq->spinlock, flags); - - if (hret != H_SUCCESS) - return hret; - - hw_queue_dtor(&eq->hw_queue); - kfree(eq); - - return hret; -} - -int ehea_destroy_eq(struct ehea_eq *eq) -{ - u64 hret; - if (!eq) - return 0; - - hcp_epas_dtor(&eq->epas); - - hret = ehea_destroy_eq_res(eq, NORMAL_FREE); - if (hret == H_R_STATE) { - ehea_error_data(eq->adapter, eq->fw_handle); - hret = ehea_destroy_eq_res(eq, FORCE_FREE); - } - - if (hret != H_SUCCESS) { - ehea_error("destroy EQ failed"); - return -EIO; - } - - return 0; -} - -/** - * allocates memory for a queue and registers pages in phyp - */ -int ehea_qp_alloc_register(struct ehea_qp *qp, struct hw_queue *hw_queue, - int nr_pages, int wqe_size, int act_nr_sges, - struct ehea_adapter *adapter, int h_call_q_selector) -{ - u64 hret, rpage; - int ret, cnt; - void *vpage; - - ret = hw_queue_ctor(hw_queue, nr_pages, EHEA_PAGESIZE, wqe_size); - if (ret) - return ret; - - for (cnt = 0; cnt < nr_pages; cnt++) { - vpage = hw_qpageit_get_inc(hw_queue); - if (!vpage) { - ehea_error("hw_qpageit_get_inc failed"); - goto out_kill_hwq; - } - rpage = virt_to_abs(vpage); - hret = ehea_h_register_rpage(adapter->handle, - 0, h_call_q_selector, - qp->fw_handle, rpage, 1); - if (hret < H_SUCCESS) { - ehea_error("register_rpage_qp failed"); - goto out_kill_hwq; - } - } - hw_qeit_reset(hw_queue); - return 0; - -out_kill_hwq: - hw_queue_dtor(hw_queue); - return -EIO; -} - -static inline u32 map_wqe_size(u8 wqe_enc_size) -{ - return 128 << wqe_enc_size; -} - -struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter, - u32 pd, struct ehea_qp_init_attr *init_attr) -{ - int ret; - u64 hret; - struct ehea_qp *qp; - u32 wqe_size_in_bytes_sq, wqe_size_in_bytes_rq1; - u32 wqe_size_in_bytes_rq2, wqe_size_in_bytes_rq3; - - - qp = kzalloc(sizeof(*qp), GFP_KERNEL); - if (!qp) { - ehea_error("no mem for qp"); - return NULL; - } - - qp->adapter = adapter; - - hret = ehea_h_alloc_resource_qp(adapter->handle, init_attr, pd, - &qp->fw_handle, &qp->epas); - if (hret != H_SUCCESS) { - ehea_error("ehea_h_alloc_resource_qp failed"); - goto out_freemem; - } - - wqe_size_in_bytes_sq = map_wqe_size(init_attr->act_wqe_size_enc_sq); - wqe_size_in_bytes_rq1 = map_wqe_size(init_attr->act_wqe_size_enc_rq1); - wqe_size_in_bytes_rq2 = map_wqe_size(init_attr->act_wqe_size_enc_rq2); - wqe_size_in_bytes_rq3 = map_wqe_size(init_attr->act_wqe_size_enc_rq3); - - ret = ehea_qp_alloc_register(qp, &qp->hw_squeue, init_attr->nr_sq_pages, - wqe_size_in_bytes_sq, - init_attr->act_wqe_size_enc_sq, adapter, - 0); - if (ret) { - ehea_error("can't register for sq ret=%x", ret); - goto out_freeres; - } - - ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue1, - init_attr->nr_rq1_pages, - wqe_size_in_bytes_rq1, - init_attr->act_wqe_size_enc_rq1, - adapter, 1); - if (ret) { - ehea_error("can't register for rq1 ret=%x", ret); - goto out_kill_hwsq; - } - - if (init_attr->rq_count > 1) { - ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue2, - init_attr->nr_rq2_pages, - wqe_size_in_bytes_rq2, - init_attr->act_wqe_size_enc_rq2, - adapter, 2); - if (ret) { - ehea_error("can't register for rq2 ret=%x", ret); - goto out_kill_hwr1q; - } - } - - if (init_attr->rq_count > 2) { - ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue3, - init_attr->nr_rq3_pages, - wqe_size_in_bytes_rq3, - init_attr->act_wqe_size_enc_rq3, - adapter, 3); - if (ret) { - ehea_error("can't register for rq3 ret=%x", ret); - goto out_kill_hwr2q; - } - } - - qp->init_attr = *init_attr; - - return qp; - -out_kill_hwr2q: - hw_queue_dtor(&qp->hw_rqueue2); - -out_kill_hwr1q: - hw_queue_dtor(&qp->hw_rqueue1); - -out_kill_hwsq: - hw_queue_dtor(&qp->hw_squeue); - -out_freeres: - ehea_h_disable_and_get_hea(adapter->handle, qp->fw_handle); - ehea_h_free_resource(adapter->handle, qp->fw_handle, FORCE_FREE); - -out_freemem: - kfree(qp); - return NULL; -} - -u64 ehea_destroy_qp_res(struct ehea_qp *qp, u64 force) -{ - u64 hret; - struct ehea_qp_init_attr *qp_attr = &qp->init_attr; - - - ehea_h_disable_and_get_hea(qp->adapter->handle, qp->fw_handle); - hret = ehea_h_free_resource(qp->adapter->handle, qp->fw_handle, force); - if (hret != H_SUCCESS) - return hret; - - hw_queue_dtor(&qp->hw_squeue); - hw_queue_dtor(&qp->hw_rqueue1); - - if (qp_attr->rq_count > 1) - hw_queue_dtor(&qp->hw_rqueue2); - if (qp_attr->rq_count > 2) - hw_queue_dtor(&qp->hw_rqueue3); - kfree(qp); - - return hret; -} - -int ehea_destroy_qp(struct ehea_qp *qp) -{ - u64 hret; - if (!qp) - return 0; - - hcp_epas_dtor(&qp->epas); - - hret = ehea_destroy_qp_res(qp, NORMAL_FREE); - if (hret == H_R_STATE) { - ehea_error_data(qp->adapter, qp->fw_handle); - hret = ehea_destroy_qp_res(qp, FORCE_FREE); - } - - if (hret != H_SUCCESS) { - ehea_error("destroy QP failed"); - return -EIO; - } - - return 0; -} - -int ehea_create_busmap(void) -{ - u64 vaddr = EHEA_BUSMAP_START; - unsigned long high_section_index = 0; - int i; - - /* - * Sections are not in ascending order -> Loop over all sections and - * find the highest PFN to compute the required map size. - */ - ehea_bmap.valid_sections = 0; - - for (i = 0; i < NR_MEM_SECTIONS; i++) - if (valid_section_nr(i)) - high_section_index = i; - - ehea_bmap.entries = high_section_index + 1; - ehea_bmap.vaddr = vmalloc(ehea_bmap.entries * sizeof(*ehea_bmap.vaddr)); - - if (!ehea_bmap.vaddr) - return -ENOMEM; - - for (i = 0 ; i < ehea_bmap.entries; i++) { - unsigned long pfn = section_nr_to_pfn(i); - - if (pfn_valid(pfn)) { - ehea_bmap.vaddr[i] = vaddr; - vaddr += EHEA_SECTSIZE; - ehea_bmap.valid_sections++; - } else - ehea_bmap.vaddr[i] = 0; - } - - return 0; -} - -void ehea_destroy_busmap(void) -{ - vfree(ehea_bmap.vaddr); -} - -u64 ehea_map_vaddr(void *caddr) -{ - u64 mapped_addr; - unsigned long index = __pa(caddr) >> SECTION_SIZE_BITS; - - if (likely(index < ehea_bmap.entries)) { - mapped_addr = ehea_bmap.vaddr[index]; - if (likely(mapped_addr)) - mapped_addr |= (((unsigned long)caddr) - & (EHEA_SECTSIZE - 1)); - else - mapped_addr = -1; - } else - mapped_addr = -1; - - if (unlikely(mapped_addr == -1)) - if (!test_and_set_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) - schedule_work(&ehea_rereg_mr_task); - - return mapped_addr; -} - -int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr) -{ - int ret; - u64 *pt; - void *pg; - u64 hret, pt_abs, i, j, m, mr_len; - u32 acc_ctrl = EHEA_MR_ACC_CTRL; - - mr_len = ehea_bmap.valid_sections * EHEA_SECTSIZE; - - pt = kzalloc(PAGE_SIZE, GFP_KERNEL); - if (!pt) { - ehea_error("no mem"); - ret = -ENOMEM; - goto out; - } - pt_abs = virt_to_abs(pt); - - hret = ehea_h_alloc_resource_mr(adapter->handle, - EHEA_BUSMAP_START, mr_len, - acc_ctrl, adapter->pd, - &mr->handle, &mr->lkey); - if (hret != H_SUCCESS) { - ehea_error("alloc_resource_mr failed"); - ret = -EIO; - goto out; - } - - for (i = 0 ; i < ehea_bmap.entries; i++) - if (ehea_bmap.vaddr[i]) { - void *sectbase = __va(i << SECTION_SIZE_BITS); - unsigned long k = 0; - - for (j = 0; j < (EHEA_PAGES_PER_SECTION / - EHEA_MAX_RPAGE); j++) { - - for (m = 0; m < EHEA_MAX_RPAGE; m++) { - pg = sectbase + ((k++) * EHEA_PAGESIZE); - pt[m] = virt_to_abs(pg); - } - - hret = ehea_h_register_rpage_mr(adapter->handle, - mr->handle, - 0, 0, pt_abs, - EHEA_MAX_RPAGE); - if ((hret != H_SUCCESS) - && (hret != H_PAGE_REGISTERED)) { - ehea_h_free_resource(adapter->handle, - mr->handle, - FORCE_FREE); - ehea_error("register_rpage_mr failed"); - ret = -EIO; - goto out; - } - } - } - - if (hret != H_SUCCESS) { - ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE); - ehea_error("registering mr failed"); - ret = -EIO; - goto out; - } - - mr->vaddr = EHEA_BUSMAP_START; - mr->adapter = adapter; - ret = 0; -out: - kfree(pt); - return ret; -} - -int ehea_rem_mr(struct ehea_mr *mr) -{ - u64 hret; - - if (!mr || !mr->adapter) - return -EINVAL; - - hret = ehea_h_free_resource(mr->adapter->handle, mr->handle, - FORCE_FREE); - if (hret != H_SUCCESS) { - ehea_error("destroy MR failed"); - return -EIO; - } - - return 0; -} - -int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr, - struct ehea_mr *shared_mr) -{ - u64 hret; - - hret = ehea_h_register_smr(adapter->handle, old_mr->handle, - old_mr->vaddr, EHEA_MR_ACC_CTRL, - adapter->pd, shared_mr); - if (hret != H_SUCCESS) - return -EIO; - - shared_mr->adapter = adapter; - - return 0; -} - -void print_error_data(u64 *data) -{ - int length; - u64 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, data[2]); - u64 resource = data[1]; - - length = EHEA_BMASK_GET(ERROR_DATA_LENGTH, data[0]); - - if (length > EHEA_PAGESIZE) - length = EHEA_PAGESIZE; - - if (type == 0x8) /* Queue Pair */ - ehea_error("QP (resource=%lX) state: AER=0x%lX, AERR=0x%lX, " - "port=%lX", resource, data[6], data[12], data[22]); - - if (type == 0x4) /* Completion Queue */ - ehea_error("CQ (resource=%lX) state: AER=0x%lX", resource, - data[6]); - - if (type == 0x3) /* Event Queue */ - ehea_error("EQ (resource=%lX) state: AER=0x%lX", resource, - data[6]); - - ehea_dump(data, length, "error data"); -} - -void ehea_error_data(struct ehea_adapter *adapter, u64 res_handle) -{ - unsigned long ret; - u64 *rblock; - - rblock = kzalloc(PAGE_SIZE, GFP_KERNEL); - if (!rblock) { - ehea_error("Cannot allocate rblock memory."); - return; - } - - ret = ehea_h_error_data(adapter->handle, - res_handle, - rblock); - - if (ret == H_R_STATE) - ehea_error("No error data is available: %lX.", res_handle); - else if (ret == H_SUCCESS) - print_error_data(rblock); - else - ehea_error("Error data could not be fetched: %lX", res_handle); - - kfree(rblock); -} |