Signed-off-by: Jan-Bernd Themann <[email protected]>
drivers/net/ehea/ehea_qmr.c | 643 ++++++++++++++++++++++++++++++++++++++++++++
drivers/net/ehea/ehea_qmr.h | 367 +++++++++++++++++++++++++
2 files changed, 1010 insertions(+)
--- linux-2.6.18-rc4-orig/drivers/net/ehea/ehea_qmr.c 1969-12-31 16:00:00.000000000 -0800
+++ kernel/drivers/net/ehea/ehea_qmr.c 2006-08-18 00:01:02.765367182 -0700
@@ -0,0 +1,643 @@
+/*
+ * linux/drivers/net/ehea/ehea_qmr.c
+ *
+ * eHEA ethernet device driver for IBM eServer System p
+ *
+ * (C) Copyright IBM Corp. 2006
+ *
+ * Authors:
+ * Christoph Raisch <[email protected]>
+ * Jan-Bernd Themann <[email protected]>
+ * Thomas Klein <[email protected]>
+ *
+ *
+ * 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 "ehea.h"
+#include "ehea_phyp.h"
+#include "ehea_qmr.h"
+
+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)) != 0) {
+ 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;
+
+ if (pagesize > PAGE_SIZE) {
+ ehea_error("FATAL ERROR: pagesize=%x is greater than "
+ "kernel page size", pagesize);
+ return 0;
+ }
+ if (!pages_per_kpage) {
+ ehea_error("FATAL ERROR: invalid kernel page size. "
+ "pages_per_kpage=%x", pages_per_kpage);
+ return 0;
+ }
+ queue->queue_length = nr_of_pages * pagesize;
+ queue->queue_pages = vmalloc(nr_of_pages * sizeof(void *));
+ if (!queue->queue_pages) {
+ ehea_error("no mem");
+ return 0;
+ }
+ memset(queue->queue_pages, 0, nr_of_pages * sizeof(void *));
+ /*
+ * 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) {
+ int k;
+ u8 *kpage = (u8*)get_zeroed_page(GFP_KERNEL);
+ if (!kpage)
+ goto hw_queue_ctor_exit0;
+ 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 1;
+
+hw_queue_ctor_exit0:
+ 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 0;
+}
+
+static void hw_queue_dtor(struct hw_queue *queue)
+{
+ int pages_per_kpage = PAGE_SIZE / queue->pagesize;
+ int i;
+ int 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]);
+
+ vfree(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 = NULL;
+ struct h_epa epa;
+
+ u64 *cq_handle_ref;
+ u32 act_nr_of_entries;
+ u32 act_pages;
+ u64 hret = H_HARDWARE;
+ int hwret;
+ u32 counter;
+ void *vpage = NULL;
+ u64 rpage = 0;
+
+ cq = kzalloc(sizeof(*cq), GFP_KERNEL);
+ if (!cq) {
+ ehea_error("no mem for cq");
+ goto create_cq_exit0;
+ }
+
+ 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, &cq->attr,
+ &cq->fw_handle, &cq->epas);
+ if (hret != H_SUCCESS) {
+ ehea_error("alloc_resource_cq failed");
+ goto create_cq_exit1;
+ }
+
+ hwret = hw_queue_ctor(&cq->hw_queue, cq->attr.nr_pages,
+ EHEA_PAGESIZE, sizeof(struct ehea_cqe));
+ if (!hwret)
+ goto create_cq_exit2;
+
+ 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 create_cq_exit3;
+ }
+
+ rpage = virt_to_abs(vpage);
+
+ hret = ehea_h_register_rpage_cq(adapter->handle, cq->fw_handle,
+ 0, EHEA_CQ_REGISTER_ORIG, rpage,
+ 1, cq->epas.kernel);
+ 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 create_cq_exit3;
+ }
+
+ 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 create_cq_exit3;
+ }
+ } else {
+ if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
+ ehea_error("CQ: registration of page failed "
+ "hret=%lx\n", hret);
+ goto create_cq_exit3;
+ }
+ }
+ }
+
+ hw_qeit_reset(&cq->hw_queue);
+ epa = cq->epas.kernel;
+ ehea_reset_cq_ep(cq);
+ ehea_reset_cq_n1(cq);
+
+ return cq;
+
+create_cq_exit3:
+ hw_queue_dtor(&cq->hw_queue);
+
+create_cq_exit2:
+ ehea_h_destroy_cq(adapter->handle, cq, cq->fw_handle, &cq->epas);
+
+create_cq_exit1:
+ kfree(cq);
+
+create_cq_exit0:
+ return NULL;
+}
+
+int ehea_destroy_cq(struct ehea_cq *cq)
+{
+ u64 adapter_handle;
+ u64 hret = H_HARDWARE;
+
+ adapter_handle = cq->adapter->handle;
+
+ if (!cq)
+ return 0;
+
+ /* deregister all previous registered pages */
+ hret = ehea_h_destroy_cq(adapter_handle, cq, cq->fw_handle, &cq->epas);
+ if (hret != H_SUCCESS) {
+ ehea_error("destroy CQ failed");
+ return -EINVAL;
+ }
+
+ hw_queue_dtor(&cq->hw_queue);
+ kfree(cq);
+
+ 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)
+{
+ u64 hret = H_HARDWARE;
+ int ret = 0;
+ u32 i;
+ void *vpage = NULL;
+ u64 rpage = 0;
+ 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, &eq->attr, &eq->fw_handle);
+
+ if (hret != H_SUCCESS) {
+ ehea_error("alloc_resource_eq failed");
+ goto free_eq_mem;
+ }
+
+ 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 alloc_pages_failed;
+ }
+
+ 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 register_page_failed;
+ }
+
+ rpage = virt_to_abs(vpage);
+
+ hret = ehea_h_register_rpage_eq(adapter->handle, eq->fw_handle,
+ 0, EHEA_EQ_REGISTER_ORIG, 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 register_page_failed;
+ }
+ } else {
+ if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
+ goto register_page_failed;
+ }
+ }
+ }
+
+ hw_qeit_reset(&eq->hw_queue);
+ return eq;
+
+register_page_failed:
+ hw_queue_dtor(&eq->hw_queue);
+
+alloc_pages_failed:
+ ehea_h_destroy_eq(adapter->handle, eq, eq->fw_handle, &eq->epas);
+free_eq_mem:
+ kfree(eq);
+
+ return NULL;
+}
+
+struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq)
+{
+ struct ehea_eqe *eqe = NULL;
+ unsigned long flags = 0;
+
+ 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;
+}
+
+int ehea_destroy_eq(struct ehea_eq *eq)
+{
+ unsigned long flags = 0;
+ u64 hret = H_HARDWARE;
+
+ if (!eq)
+ return 0;
+
+ spin_lock_irqsave(&eq->spinlock, flags);
+
+ hret = ehea_h_destroy_eq(eq->adapter->handle, eq, eq->fw_handle,
+ &eq->epas);
+ spin_unlock_irqrestore(&eq->spinlock, flags);
+
+ if (hret != H_SUCCESS) {
+ ehea_error("failed freeing EQ resources");
+ return -EINVAL;
+ }
+
+ hw_queue_dtor(&eq->hw_queue);
+ kfree(eq);
+
+ 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 = H_HARDWARE;
+ u64 rpage = 0;
+ int ret = 0;
+ int cnt = 0;
+ void *vpage = NULL;
+
+ ret = hw_queue_ctor(hw_queue,
+ nr_pages, EHEA_PAGESIZE, wqe_size);
+ if (!ret)
+ return -ENOMEM;
+
+ for (cnt = 0; cnt < nr_pages; cnt++) {
+ vpage = hw_qpageit_get_inc(hw_queue);
+ if (!vpage) {
+ ehea_error("hw_qpageit_get_inc failed");
+ goto qp_alloc_register_exit0;
+ }
+ rpage = virt_to_abs(vpage);
+
+ hret = ehea_h_register_rpage_qp(adapter->handle, qp->fw_handle,
+ 0, h_call_q_selector, rpage, 1,
+ qp->epas.kernel);
+ if (hret < H_SUCCESS) {
+ ehea_error("register_rpage_qp failed");
+ goto qp_alloc_register_exit0;
+ }
+ }
+ hw_qeit_reset(hw_queue);
+
+ return 0;
+
+qp_alloc_register_exit0:
+ hw_queue_dtor(hw_queue);
+ return -EINVAL;
+}
+
+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)
+{
+ struct ehea_qp *qp;
+ u64 hret = H_HARDWARE;
+
+ u32 wqe_size_in_bytes_sq = 0;
+ u32 wqe_size_in_bytes_rq1 = 0;
+ u32 wqe_size_in_bytes_rq2 = 0;
+ u32 wqe_size_in_bytes_rq3 = 0;
+
+ int ret = -1;
+
+ 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, qp, init_attr, pd,
+ &qp->fw_handle, &qp->epas);
+ if (hret != H_SUCCESS) {
+ ehea_error("ehea_h_alloc_resource_qp failed");
+ goto create_qp_exit1;
+ }
+
+ 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 create_qp_exit2;
+ }
+
+ 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 create_qp_exit3;
+ }
+
+ 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 create_qp_exit4;
+ }
+ }
+
+ 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 create_qp_exit5;
+ }
+ }
+
+ qp->init_attr = *init_attr;
+
+ return qp;
+create_qp_exit5:
+ hw_queue_dtor(&qp->hw_rqueue2);
+
+create_qp_exit4:
+ hw_queue_dtor(&qp->hw_rqueue1);
+
+create_qp_exit3:
+ hw_queue_dtor(&qp->hw_squeue);
+
+create_qp_exit2:
+ hret = ehea_h_destroy_qp(adapter->handle, qp, qp->fw_handle, &qp->epas);
+
+create_qp_exit1:
+ kfree(qp);
+ return NULL;
+}
+
+int ehea_destroy_qp(struct ehea_qp *qp)
+{
+ int ret = 0;
+ u64 hret = H_HARDWARE;
+ struct ehea_qp_init_attr *qp_attr = &qp->init_attr;
+
+ if (!qp)
+ return 0;
+
+ hret = ehea_h_destroy_qp(qp->adapter->handle, qp, qp->fw_handle,
+ &qp->epas);
+ if (hret != H_SUCCESS) {
+ ehea_error("destroy QP failed");
+ ret = -EINVAL;
+ }
+
+ 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 ret;
+}
+
+int ehea_reg_mr_adapter(struct ehea_adapter *adapter)
+{
+ int i = 0;
+ int k = 0;
+ u64 hret = H_HARDWARE;
+ u64 start = KERNELBASE;
+ u64 end = (u64) high_memory;
+ u64 nr_pages = (end - start) / PAGE_SIZE;
+ u32 acc_ctrl = EHEA_MR_ACC_CTRL;
+ u64 pt_abs = 0;
+ u64 *pt;
+
+ pt = kzalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!pt) {
+ ehea_error("no mem");
+ return -ENOMEM;
+ }
+ pt_abs = virt_to_abs(pt);
+
+ hret = ehea_h_alloc_resource_mr(adapter->handle, start, end - start,
+ acc_ctrl, adapter->pd,
+ &adapter->mr.handle, &adapter->mr.lkey);
+ if (hret != H_SUCCESS) {
+ ehea_error("alloc_mr failed");
+ return -EINVAL;
+ }
+
+ adapter->mr.vaddr = KERNELBASE;
+
+ while (nr_pages > 0) {
+ if (nr_pages > 1) {
+ u64 num_pages = min(nr_pages, (u64)512);
+ for (i = 0; i < num_pages; i++)
+ pt[i] = virt_to_abs((void*)(((u64)start)
+ + ((k++) *
+ PAGE_SIZE)));
+
+ hret = ehea_h_register_rpage_mr(adapter->handle,
+ adapter->mr.handle, 0,
+ 0, (u64)pt_abs,
+ num_pages);
+ nr_pages -= num_pages;
+ } else {
+ u64 abs_adr = virt_to_abs((void *)(((u64)start)
+ + (k * PAGE_SIZE)));
+ hret = ehea_h_register_rpage_mr(adapter->handle,
+ adapter->mr.handle, 0,
+ 0, abs_adr,1);
+ nr_pages--;
+ }
+
+ if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED)) {
+ ehea_h_free_resource_mr(adapter->handle,
+ adapter->mr.handle);
+ ehea_error("free_resource_mr failed");
+ return -EINVAL;
+ }
+ }
+
+ if (hret != H_SUCCESS) {
+ ehea_h_free_resource_mr(adapter->handle, adapter->mr.handle);
+ ehea_error("free_resource_mr failed for last page");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+int ehea_reg_mr_pages(struct ehea_adapter *adapter,
+ struct ehea_mr *mr,
+ u64 start, u64 *pt, int nr_pages)
+{
+ u64 hret = H_HARDWARE;
+ u32 acc_ctrl = EHEA_MR_ACC_CTRL;
+
+ u64 pt_abs = virt_to_abs(pt);
+ u64 first_page = pt[0];
+
+ hret = ehea_h_alloc_resource_mr(adapter->handle, start,
+ PAGE_SIZE * nr_pages, acc_ctrl,
+ adapter->pd, &mr->handle, &mr->lkey);
+ if (hret != H_SUCCESS) {
+ ehea_error("alloc_resource_mr failed");
+ return -EINVAL;
+ }
+
+ if (nr_pages > 1)
+ hret = ehea_h_register_rpage_mr(adapter->handle, mr->handle,
+ 0, 0, (u64)pt_abs, nr_pages);
+ else
+ hret = ehea_h_register_rpage_mr(adapter->handle, mr->handle,
+ 0, 0, first_page, 1);
+
+ if (hret != H_SUCCESS) {
+ ehea_h_free_resource_mr(adapter->handle, mr->handle);
+ ehea_error("free_resource_mr failed for last page");
+ return -EINVAL;
+ }
+ mr->vaddr = start;
+ return 0;
+}
+
+int ehea_dereg_mr_adapter(struct ehea_adapter *adapter)
+{
+ u64 hret = H_HARDWARE;
+
+ hret = ehea_h_free_resource_mr(adapter->handle, adapter->mr.handle);
+ if (hret != H_SUCCESS) {
+ return -EINVAL;
+ }
+
+ return 0;
+}
--- linux-2.6.18-rc4-orig/drivers/net/ehea/ehea_qmr.h 1969-12-31 16:00:00.000000000 -0800
+++ kernel/drivers/net/ehea/ehea_qmr.h 2006-08-18 00:01:02.642366062 -0700
@@ -0,0 +1,367 @@
+/*
+ * linux/drivers/net/ehea/ehea_qmr.h
+ *
+ * eHEA ethernet device driver for IBM eServer System p
+ *
+ * (C) Copyright IBM Corp. 2006
+ *
+ * Authors:
+ * Christoph Raisch <[email protected]>
+ * Jan-Bernd Themann <[email protected]>
+ * Thomas Klein <[email protected]>
+ *
+ *
+ * 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.
+ */
+
+#ifndef __EHEA_QMR_H__
+#define __EHEA_QMR_H__
+
+#include "ehea.h"
+#include "ehea_hw.h"
+
+/*
+ * page size of ehea hardware queues
+ */
+
+#define EHEA_PAGESHIFT 12
+#define EHEA_PAGESIZE 4096UL
+
+/* Some abbreviations used here:
+ *
+ * WQE - Work Queue Entry
+ * SWQE - Send Work Queue Entry
+ * RWQE - Receive Work Queue Entry
+ * CQE - Completion Queue Entry
+ * EQE - Event Queue Entry
+ * MR - Memory Region
+ */
+
+/* Use of WR_ID field for EHEA */
+#define EHEA_WR_ID_COUNT EHEA_BMASK_IBM(0, 19)
+#define EHEA_WR_ID_TYPE EHEA_BMASK_IBM(20, 23)
+#define EHEA_SWQE2_TYPE 0x1
+#define EHEA_SWQE3_TYPE 0x2
+#define EHEA_RWQE2_TYPE 0x3
+#define EHEA_RWQE3_TYPE 0x4
+#define EHEA_WR_ID_INDEX EHEA_BMASK_IBM(24, 47)
+#define EHEA_WR_ID_REFILL EHEA_BMASK_IBM(48, 63)
+
+struct ehea_vsgentry {
+ u64 vaddr;
+ u32 l_key;
+ u32 len;
+};
+
+/* maximum number of sg entries allowed in a WQE */
+#define EHEA_MAX_WQE_SG_ENTRIES 252
+#define SWQE2_MAX_IMM (0xD0 - 0x30)
+#define SWQE3_MAX_IMM 224
+
+/* tx control flags for swqe */
+#define EHEA_SWQE_CRC 0x8000
+#define EHEA_SWQE_IP_CHECKSUM 0x4000
+#define EHEA_SWQE_TCP_CHECKSUM 0x2000
+#define EHEA_SWQE_TSO 0x1000
+#define EHEA_SWQE_SIGNALLED_COMPLETION 0x0800
+#define EHEA_SWQE_VLAN_INSERT 0x0400
+#define EHEA_SWQE_IMM_DATA_PRESENT 0x0200
+#define EHEA_SWQE_DESCRIPTORS_PRESENT 0x0100
+#define EHEA_SWQE_WRAP_CTL_REC 0x0080
+#define EHEA_SWQE_WRAP_CTL_FORCE 0x0040
+#define EHEA_SWQE_BIND 0x0020
+#define EHEA_SWQE_PURGE 0x0010
+
+#define SWQE_HEADER_SIZE 32
+
+struct ehea_swqe {
+ u64 wr_id;
+ u16 tx_control;
+ u16 vlan_tag;
+ u8 reserved1;
+ u8 ip_start;
+ u8 ip_end;
+ u8 immediate_data_length;
+ u8 tcp_offset;
+ u8 reserved2;
+ u16 tcp_end;
+ u8 wrap_tag;
+ u8 descriptors; /* number of valid descriptors in WQE */
+ u16 reserved3;
+ u16 reserved4;
+ u16 mss;
+ u32 reserved5;
+ union {
+ /* Send WQE Format 1 */
+ struct {
+ struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES];
+ } no_immediate_data;
+
+ /* Send WQE Format 2 */
+ struct {
+ struct ehea_vsgentry sg_entry;
+ /* 0x30 */
+ u8 immediate_data[SWQE2_MAX_IMM];
+ /* 0xd0 */
+ struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES-1];
+ } immdata_desc __attribute__ ((packed));
+
+ /* Send WQE Format 3 */
+ struct {
+ u8 immediate_data[SWQE3_MAX_IMM];
+ } immdata_nodesc;
+ } u;
+};
+
+struct ehea_rwqe {
+ u64 wr_id; /* work request ID */
+ u8 reserved1[5];
+ u8 data_segments;
+ u16 reserved2;
+ u64 reserved3;
+ u64 reserved4;
+ struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES];
+};
+
+#define EHEA_CQE_VLAN_TAG_XTRACT 0x0400
+
+#define EHEA_CQE_TYPE_RQ 0x60
+#define EHEA_CQE_STAT_ERR_MASK 0x7300
+#define EHEA_CQE_STAT_ERR_TCP 0x4000
+
+struct ehea_cqe {
+ u64 wr_id; /* work request ID from WQE */
+ u8 type;
+ u8 valid;
+ u16 status;
+ u16 reserved1;
+ u16 num_bytes_transfered;
+ u16 vlan_tag;
+ u16 inet_checksum_value;
+ u8 reserved2;
+ u8 header_length;
+ u16 reserved3;
+ u16 page_offset;
+ u16 wqe_count;
+ u32 qp_token;
+ u32 timestamp;
+ u32 reserved4;
+ u64 reserved5[3];
+};
+
+#define EHEA_EQE_VALID EHEA_BMASK_IBM(0, 0)
+#define EHEA_EQE_IS_CQE EHEA_BMASK_IBM(1, 1)
+#define EHEA_EQE_IDENTIFIER EHEA_BMASK_IBM(2, 7)
+#define EHEA_EQE_QP_CQ_NUMBER EHEA_BMASK_IBM(8, 31)
+#define EHEA_EQE_QP_TOKEN EHEA_BMASK_IBM(32, 63)
+#define EHEA_EQE_CQ_TOKEN EHEA_BMASK_IBM(32, 63)
+#define EHEA_EQE_KEY EHEA_BMASK_IBM(32, 63)
+#define EHEA_EQE_PORT_NUMBER EHEA_BMASK_IBM(56, 63)
+#define EHEA_EQE_EQ_NUMBER EHEA_BMASK_IBM(48, 63)
+#define EHEA_EQE_SM_ID EHEA_BMASK_IBM(48, 63)
+#define EHEA_EQE_SM_MECH_NUMBER EHEA_BMASK_IBM(48, 55)
+#define EHEA_EQE_SM_PORT_NUMBER EHEA_BMASK_IBM(56, 63)
+
+struct ehea_eqe {
+ u64 entry;
+};
+
+static inline void *hw_qeit_calc(struct hw_queue *queue, u64 q_offset)
+{
+ struct ehea_page *current_page = NULL;
+ if (q_offset >= queue->queue_length)
+ q_offset -= queue->queue_length;
+ current_page = (queue->queue_pages)[q_offset >> EHEA_PAGESHIFT];
+ return ¤t_page->entries[q_offset & (EHEA_PAGESIZE - 1)];
+}
+
+static inline void *hw_qeit_get(struct hw_queue *queue)
+{
+ return hw_qeit_calc(queue, queue->current_q_offset);
+}
+
+static inline void hw_qeit_inc(struct hw_queue *queue)
+{
+ queue->current_q_offset += queue->qe_size;
+ if (queue->current_q_offset >= queue->queue_length) {
+ queue->current_q_offset = 0;
+ /* toggle the valid flag */
+ queue->toggle_state = (~queue->toggle_state) & 1;
+ }
+}
+
+static inline void *hw_qeit_get_inc(struct hw_queue *queue)
+{
+ void *retvalue = hw_qeit_get(queue);
+ hw_qeit_inc(queue);
+ return retvalue;
+}
+
+static inline void *hw_qeit_get_inc_valid(struct hw_queue *queue)
+{
+ struct ehea_cqe *retvalue = hw_qeit_get(queue);
+ void *pref;
+ u8 valid = retvalue->valid;
+ if ((valid >> 7) == (queue->toggle_state & 1)) {
+ /* this is a good one */
+ hw_qeit_inc(queue);
+ pref = hw_qeit_calc(queue, queue->current_q_offset);
+ prefetch(pref);
+ prefetch(pref + 128);
+ } else
+ retvalue = NULL;
+ return retvalue;
+}
+
+static inline void *hw_qeit_get_valid(struct hw_queue *queue)
+{
+ u8 valid = 0;
+
+ struct ehea_cqe *retvalue = hw_qeit_get(queue);
+ void *pref;
+ pref = hw_qeit_calc(queue, queue->current_q_offset);
+ prefetch(pref);
+ prefetch(pref + 128);
+ prefetch(pref + 256);
+ valid = retvalue->valid;
+ if (!((valid >> 7) == (queue->toggle_state & 1)))
+ retvalue = NULL;
+ return retvalue;
+}
+
+static inline void *hw_qeit_reset(struct hw_queue *queue)
+{
+ queue->current_q_offset = 0;
+ return hw_qeit_get(queue);
+}
+
+static inline void *hw_qeit_eq_get_inc(struct hw_queue *queue)
+{
+ void *retvalue = NULL;
+ u64 last_entry_in_q = queue->queue_length - queue->qe_size;
+
+ retvalue = hw_qeit_get(queue);
+ queue->current_q_offset += queue->qe_size;
+ if (queue->current_q_offset > last_entry_in_q) {
+ queue->current_q_offset = 0;
+ queue->toggle_state = (~queue->toggle_state) & 1;
+ }
+ return retvalue;
+}
+
+static inline void *hw_eqit_eq_get_inc_valid(struct hw_queue *queue)
+{
+ void *retvalue = hw_qeit_get(queue);
+ u32 qe = *(u8 *) retvalue;
+ if ((qe >> 7) == (queue->toggle_state & 1))
+ hw_qeit_eq_get_inc(queue);
+ else
+ retvalue = NULL;
+ return retvalue;
+}
+
+static inline struct ehea_rwqe *ehea_get_next_rwqe(struct ehea_qp *qp,
+ int rq_nr)
+{
+ struct ehea_rwqe *wqe_p = NULL;
+ struct hw_queue *queue = NULL;
+ struct ehea_qp *my_qp = qp;
+
+ if (rq_nr == 1)
+ queue = &my_qp->hw_rqueue1;
+ else if (rq_nr == 2)
+ queue = &my_qp->hw_rqueue2;
+ else
+ queue = &my_qp->hw_rqueue3;
+ wqe_p = (struct ehea_rwqe *)hw_qeit_get_inc(queue);
+
+ return wqe_p;
+}
+
+static inline struct ehea_swqe *ehea_get_swqe(struct ehea_qp *my_qp,
+ int *wqe_index)
+{
+ struct hw_queue *queue = &my_qp->hw_squeue;
+ struct ehea_swqe *wqe_p = NULL;
+ *wqe_index = (queue->current_q_offset) >> (7 + EHEA_SG_SQ);
+ wqe_p = (struct ehea_swqe *)hw_qeit_get_inc(&my_qp->hw_squeue);
+ return wqe_p;
+}
+
+static inline void ehea_post_swqe(struct ehea_qp *my_qp, struct ehea_swqe *swqe)
+{
+ iosync();
+ ehea_update_sqa(my_qp, 1);
+}
+
+static inline struct ehea_cqe *ehea_poll_rq1(struct ehea_qp *qp, int *wqe_index)
+{
+ struct hw_queue *queue = &qp->hw_rqueue1;
+ struct ehea_cqe *cqe = NULL;
+
+ *wqe_index = (queue->current_q_offset) >> (7 + EHEA_SG_RQ1);
+ cqe = (struct ehea_cqe *)hw_qeit_get_valid(queue);
+ return cqe;
+}
+
+static inline void ehea_inc_rq1(struct ehea_qp *qp)
+{
+ struct hw_queue *queue = &qp->hw_rqueue1;
+ hw_qeit_inc(queue);
+}
+
+static inline struct ehea_cqe *ehea_poll_cq(struct ehea_cq *my_cq)
+{
+ struct ehea_cqe *wqe_p = NULL;
+ wqe_p = (struct ehea_cqe *)hw_qeit_get_inc_valid(&my_cq->hw_queue);
+ return wqe_p;
+};
+
+#define EHEA_CQ_REGISTER_ORIG 0
+#define EHEA_EQ_REGISTER_ORIG 0
+
+enum ehea_eq_type {
+ EHEA_EQ = 0, /* event queue */
+ EHEA_NEQ /* notification event queue */
+};
+
+struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
+ enum ehea_eq_type type,
+ const u32 length, const u8 eqe_gen);
+
+int ehea_destroy_eq(struct ehea_eq *eq);
+
+struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq);
+
+struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter, int cqe,
+ u64 eq_handle, u32 cq_token);
+
+int ehea_destroy_cq(struct ehea_cq *cq);
+
+
+struct ehea_qp *ehea_create_qp(struct ehea_adapter * adapter,
+ u32 pd,
+ struct ehea_qp_init_attr *init_attr);
+
+int ehea_destroy_qp(struct ehea_qp *qp);
+
+int ehea_reg_mr_adapter(struct ehea_adapter *adapter);
+int ehea_dereg_mr_adapter(struct ehea_adapter *adapter);
+
+int ehea_reg_mr_pages(struct ehea_adapter *adapter,
+ struct ehea_mr *mr,
+ u64 start, u64 *pt, int nr_pages);
+
+#endif /* __EHEA_QMR_H__ */
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