--- /dev/null
+/*******************************************************************
+ * This file is part of the Emulex RoCE Device Driver for *
+ * RoCE (RDMA over Converged Ethernet) adapters. *
+ * Copyright (C) 2008-2012 Emulex. All rights reserved. *
+ * EMULEX and SLI are trademarks of Emulex. *
+ * www.emulex.com *
+ * *
+ * This program is free software; you can redistribute it and/or *
+ * modify it under the terms of version 2 of the GNU General *
+ * Public License as published by the Free Software Foundation. *
+ * This program is distributed in the hope that it will be useful. *
+ * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
+ * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
+ * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
+ * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
+ * TO BE LEGALLY INVALID. See the GNU General Public License for *
+ * more details, a copy of which can be found in the file COPYING *
+ * included with this package. *
+ *
+ * Contact Information:
+ * linux-drivers@emulex.com
+ *
+ * Emulex
+ * 3333 Susan Street
+ * Costa Mesa, CA 92626
+ *******************************************************************/
+
+#include <linux/dma-mapping.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_user_verbs.h>
+#include <rdma/iw_cm.h>
+#include <rdma/ib_umem.h>
+#include <rdma/ib_addr.h>
+
+#include "ocrdma.h"
+#include "ocrdma_hw.h"
+#include "ocrdma_verbs.h"
+#include "ocrdma_abi.h"
+
+int ocrdma_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
+{
+ if (index > 1)
+ return -EINVAL;
+
+ *pkey = 0xffff;
+ return 0;
+}
+
+int ocrdma_query_gid(struct ib_device *ibdev, u8 port,
+ int index, union ib_gid *sgid)
+{
+ struct ocrdma_dev *dev;
+
+ dev = get_ocrdma_dev(ibdev);
+ memset(sgid, 0, sizeof(*sgid));
+ if (index >= OCRDMA_MAX_SGID)
+ return -EINVAL;
+
+ memcpy(sgid, &dev->sgid_tbl[index], sizeof(*sgid));
+
+ return 0;
+}
+
+int ocrdma_query_device(struct ib_device *ibdev, struct ib_device_attr *attr)
+{
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
+
+ memset(attr, 0, sizeof *attr);
+ memcpy(&attr->fw_ver, &dev->attr.fw_ver[0],
+ min(sizeof(dev->attr.fw_ver), sizeof(attr->fw_ver)));
+ ocrdma_get_guid(dev, (u8 *)&attr->sys_image_guid);
+ attr->max_mr_size = dev->attr.max_mr_size;
+ attr->page_size_cap = 0xffff000;
+ attr->vendor_id = dev->nic_info.pdev->vendor;
+ attr->vendor_part_id = dev->nic_info.pdev->device;
+ attr->hw_ver = dev->asic_id;
+ attr->max_qp = dev->attr.max_qp;
+ attr->max_ah = OCRDMA_MAX_AH;
+ attr->max_qp_wr = dev->attr.max_wqe;
+
+ attr->device_cap_flags = IB_DEVICE_CURR_QP_STATE_MOD |
+ IB_DEVICE_RC_RNR_NAK_GEN |
+ IB_DEVICE_SHUTDOWN_PORT |
+ IB_DEVICE_SYS_IMAGE_GUID |
+ IB_DEVICE_LOCAL_DMA_LKEY |
+ IB_DEVICE_MEM_MGT_EXTENSIONS;
+ attr->max_sge = min(dev->attr.max_send_sge, dev->attr.max_srq_sge);
+ attr->max_sge_rd = 0;
+ attr->max_cq = dev->attr.max_cq;
+ attr->max_cqe = dev->attr.max_cqe;
+ attr->max_mr = dev->attr.max_mr;
+ attr->max_mw = dev->attr.max_mw;
+ attr->max_pd = dev->attr.max_pd;
+ attr->atomic_cap = 0;
+ attr->max_fmr = 0;
+ attr->max_map_per_fmr = 0;
+ attr->max_qp_rd_atom =
+ min(dev->attr.max_ord_per_qp, dev->attr.max_ird_per_qp);
+ attr->max_qp_init_rd_atom = dev->attr.max_ord_per_qp;
+ attr->max_srq = dev->attr.max_srq;
+ attr->max_srq_sge = dev->attr.max_srq_sge;
+ attr->max_srq_wr = dev->attr.max_rqe;
+ attr->local_ca_ack_delay = dev->attr.local_ca_ack_delay;
+ attr->max_fast_reg_page_list_len = dev->attr.max_pages_per_frmr;
+ attr->max_pkeys = 1;
+ return 0;
+}
+
+static inline void get_link_speed_and_width(struct ocrdma_dev *dev,
+ u8 *ib_speed, u8 *ib_width)
+{
+ int status;
+ u8 speed;
+
+ status = ocrdma_mbx_get_link_speed(dev, &speed);
+ if (status)
+ speed = OCRDMA_PHYS_LINK_SPEED_ZERO;
+
+ switch (speed) {
+ case OCRDMA_PHYS_LINK_SPEED_1GBPS:
+ *ib_speed = IB_SPEED_SDR;
+ *ib_width = IB_WIDTH_1X;
+ break;
+
+ case OCRDMA_PHYS_LINK_SPEED_10GBPS:
+ *ib_speed = IB_SPEED_QDR;
+ *ib_width = IB_WIDTH_1X;
+ break;
+
+ case OCRDMA_PHYS_LINK_SPEED_20GBPS:
+ *ib_speed = IB_SPEED_DDR;
+ *ib_width = IB_WIDTH_4X;
+ break;
+
+ case OCRDMA_PHYS_LINK_SPEED_40GBPS:
+ *ib_speed = IB_SPEED_QDR;
+ *ib_width = IB_WIDTH_4X;
+ break;
+
+ default:
+ /* Unsupported */
+ *ib_speed = IB_SPEED_SDR;
+ *ib_width = IB_WIDTH_1X;
+ }
+}
+
+int ocrdma_query_port(struct ib_device *ibdev,
+ u8 port, struct ib_port_attr *props)
+{
+ enum ib_port_state port_state;
+ struct ocrdma_dev *dev;
+ struct net_device *netdev;
+
+ dev = get_ocrdma_dev(ibdev);
+ if (port > 1) {
+ pr_err("%s(%d) invalid_port=0x%x\n", __func__,
+ dev->id, port);
+ return -EINVAL;
+ }
+ netdev = dev->nic_info.netdev;
+ if (netif_running(netdev) && netif_oper_up(netdev)) {
+ port_state = IB_PORT_ACTIVE;
+ props->phys_state = 5;
+ } else {
+ port_state = IB_PORT_DOWN;
+ props->phys_state = 3;
+ }
+ props->max_mtu = IB_MTU_4096;
+ props->active_mtu = iboe_get_mtu(netdev->mtu);
+ props->lid = 0;
+ props->lmc = 0;
+ props->sm_lid = 0;
+ props->sm_sl = 0;
+ props->state = port_state;
+ props->port_cap_flags =
+ IB_PORT_CM_SUP |
+ IB_PORT_REINIT_SUP |
+ IB_PORT_DEVICE_MGMT_SUP | IB_PORT_VENDOR_CLASS_SUP | IB_PORT_IP_BASED_GIDS;
+ props->gid_tbl_len = OCRDMA_MAX_SGID;
+ props->pkey_tbl_len = 1;
+ props->bad_pkey_cntr = 0;
+ props->qkey_viol_cntr = 0;
+ get_link_speed_and_width(dev, &props->active_speed,
+ &props->active_width);
+ props->max_msg_sz = 0x80000000;
+ props->max_vl_num = 4;
+ return 0;
+}
+
+int ocrdma_modify_port(struct ib_device *ibdev, u8 port, int mask,
+ struct ib_port_modify *props)
+{
+ struct ocrdma_dev *dev;
+
+ dev = get_ocrdma_dev(ibdev);
+ if (port > 1) {
+ pr_err("%s(%d) invalid_port=0x%x\n", __func__, dev->id, port);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int ocrdma_add_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
+ unsigned long len)
+{
+ struct ocrdma_mm *mm;
+
+ mm = kzalloc(sizeof(*mm), GFP_KERNEL);
+ if (mm == NULL)
+ return -ENOMEM;
+ mm->key.phy_addr = phy_addr;
+ mm->key.len = len;
+ INIT_LIST_HEAD(&mm->entry);
+
+ mutex_lock(&uctx->mm_list_lock);
+ list_add_tail(&mm->entry, &uctx->mm_head);
+ mutex_unlock(&uctx->mm_list_lock);
+ return 0;
+}
+
+static void ocrdma_del_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
+ unsigned long len)
+{
+ struct ocrdma_mm *mm, *tmp;
+
+ mutex_lock(&uctx->mm_list_lock);
+ list_for_each_entry_safe(mm, tmp, &uctx->mm_head, entry) {
+ if (len != mm->key.len && phy_addr != mm->key.phy_addr)
+ continue;
+
+ list_del(&mm->entry);
+ kfree(mm);
+ break;
+ }
+ mutex_unlock(&uctx->mm_list_lock);
+}
+
+static bool ocrdma_search_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
+ unsigned long len)
+{
+ bool found = false;
+ struct ocrdma_mm *mm;
+
+ mutex_lock(&uctx->mm_list_lock);
+ list_for_each_entry(mm, &uctx->mm_head, entry) {
+ if (len != mm->key.len && phy_addr != mm->key.phy_addr)
+ continue;
+
+ found = true;
+ break;
+ }
+ mutex_unlock(&uctx->mm_list_lock);
+ return found;
+}
+
+
+static u16 _ocrdma_pd_mgr_get_bitmap(struct ocrdma_dev *dev, bool dpp_pool)
+{
+ u16 pd_bitmap_idx = 0;
+ const unsigned long *pd_bitmap;
+
+ if (dpp_pool) {
+ pd_bitmap = dev->pd_mgr->pd_dpp_bitmap;
+ pd_bitmap_idx = find_first_zero_bit(pd_bitmap,
+ dev->pd_mgr->max_dpp_pd);
+ __set_bit(pd_bitmap_idx, dev->pd_mgr->pd_dpp_bitmap);
+ dev->pd_mgr->pd_dpp_count++;
+ if (dev->pd_mgr->pd_dpp_count > dev->pd_mgr->pd_dpp_thrsh)
+ dev->pd_mgr->pd_dpp_thrsh = dev->pd_mgr->pd_dpp_count;
+ } else {
+ pd_bitmap = dev->pd_mgr->pd_norm_bitmap;
+ pd_bitmap_idx = find_first_zero_bit(pd_bitmap,
+ dev->pd_mgr->max_normal_pd);
+ __set_bit(pd_bitmap_idx, dev->pd_mgr->pd_norm_bitmap);
+ dev->pd_mgr->pd_norm_count++;
+ if (dev->pd_mgr->pd_norm_count > dev->pd_mgr->pd_norm_thrsh)
+ dev->pd_mgr->pd_norm_thrsh = dev->pd_mgr->pd_norm_count;
+ }
+ return pd_bitmap_idx;
+}
+
+static int _ocrdma_pd_mgr_put_bitmap(struct ocrdma_dev *dev, u16 pd_id,
+ bool dpp_pool)
+{
+ u16 pd_count;
+ u16 pd_bit_index;
+
+ pd_count = dpp_pool ? dev->pd_mgr->pd_dpp_count :
+ dev->pd_mgr->pd_norm_count;
+ if (pd_count == 0)
+ return -EINVAL;
+
+ if (dpp_pool) {
+ pd_bit_index = pd_id - dev->pd_mgr->pd_dpp_start;
+ if (pd_bit_index >= dev->pd_mgr->max_dpp_pd) {
+ return -EINVAL;
+ } else {
+ __clear_bit(pd_bit_index, dev->pd_mgr->pd_dpp_bitmap);
+ dev->pd_mgr->pd_dpp_count--;
+ }
+ } else {
+ pd_bit_index = pd_id - dev->pd_mgr->pd_norm_start;
+ if (pd_bit_index >= dev->pd_mgr->max_normal_pd) {
+ return -EINVAL;
+ } else {
+ __clear_bit(pd_bit_index, dev->pd_mgr->pd_norm_bitmap);
+ dev->pd_mgr->pd_norm_count--;
+ }
+ }
+
+ return 0;
+}
+
+static u8 ocrdma_put_pd_num(struct ocrdma_dev *dev, u16 pd_id,
+ bool dpp_pool)
+{
+ int status;
+
+ mutex_lock(&dev->dev_lock);
+ status = _ocrdma_pd_mgr_put_bitmap(dev, pd_id, dpp_pool);
+ mutex_unlock(&dev->dev_lock);
+ return status;
+}
+
+static int ocrdma_get_pd_num(struct ocrdma_dev *dev, struct ocrdma_pd *pd)
+{
+ u16 pd_idx = 0;
+ int status = 0;
+
+ mutex_lock(&dev->dev_lock);
+ if (pd->dpp_enabled) {
+ /* try allocating DPP PD, if not available then normal PD */
+ if (dev->pd_mgr->pd_dpp_count < dev->pd_mgr->max_dpp_pd) {
+ pd_idx = _ocrdma_pd_mgr_get_bitmap(dev, true);
+ pd->id = dev->pd_mgr->pd_dpp_start + pd_idx;
+ pd->dpp_page = dev->pd_mgr->dpp_page_index + pd_idx;
+ } else if (dev->pd_mgr->pd_norm_count <
+ dev->pd_mgr->max_normal_pd) {
+ pd_idx = _ocrdma_pd_mgr_get_bitmap(dev, false);
+ pd->id = dev->pd_mgr->pd_norm_start + pd_idx;
+ pd->dpp_enabled = false;
+ } else {
+ status = -EINVAL;
+ }
+ } else {
+ if (dev->pd_mgr->pd_norm_count < dev->pd_mgr->max_normal_pd) {
+ pd_idx = _ocrdma_pd_mgr_get_bitmap(dev, false);
+ pd->id = dev->pd_mgr->pd_norm_start + pd_idx;
+ } else {
+ status = -EINVAL;
+ }
+ }
+ mutex_unlock(&dev->dev_lock);
+ return status;
+}
+
+static struct ocrdma_pd *_ocrdma_alloc_pd(struct ocrdma_dev *dev,
+ struct ocrdma_ucontext *uctx,
+ struct ib_udata *udata)
+{
+ struct ocrdma_pd *pd = NULL;
+ int status = 0;
+
+ pd = kzalloc(sizeof(*pd), GFP_KERNEL);
+ if (!pd)
+ return ERR_PTR(-ENOMEM);
+
+ if (udata && uctx && dev->attr.max_dpp_pds) {
+ pd->dpp_enabled =
+ ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R;
+ pd->num_dpp_qp =
+ pd->dpp_enabled ? (dev->nic_info.db_page_size /
+ dev->attr.wqe_size) : 0;
+ }
+
+ if (dev->pd_mgr->pd_prealloc_valid) {
+ status = ocrdma_get_pd_num(dev, pd);
+ return (status == 0) ? pd : ERR_PTR(status);
+ }
+
+retry:
+ status = ocrdma_mbx_alloc_pd(dev, pd);
+ if (status) {
+ if (pd->dpp_enabled) {
+ pd->dpp_enabled = false;
+ pd->num_dpp_qp = 0;
+ goto retry;
+ } else {
+ kfree(pd);
+ return ERR_PTR(status);
+ }
+ }
+
+ return pd;
+}
+
+static inline int is_ucontext_pd(struct ocrdma_ucontext *uctx,
+ struct ocrdma_pd *pd)
+{
+ return (uctx->cntxt_pd == pd ? true : false);
+}
+
+static int _ocrdma_dealloc_pd(struct ocrdma_dev *dev,
+ struct ocrdma_pd *pd)
+{
+ int status = 0;
+
+ if (dev->pd_mgr->pd_prealloc_valid)
+ status = ocrdma_put_pd_num(dev, pd->id, pd->dpp_enabled);
+ else
+ status = ocrdma_mbx_dealloc_pd(dev, pd);
+
+ kfree(pd);
+ return status;
+}
+
+static int ocrdma_alloc_ucontext_pd(struct ocrdma_dev *dev,
+ struct ocrdma_ucontext *uctx,
+ struct ib_udata *udata)
+{
+ int status = 0;
+
+ uctx->cntxt_pd = _ocrdma_alloc_pd(dev, uctx, udata);
+ if (IS_ERR(uctx->cntxt_pd)) {
+ status = PTR_ERR(uctx->cntxt_pd);
+ uctx->cntxt_pd = NULL;
+ goto err;
+ }
+
+ uctx->cntxt_pd->uctx = uctx;
+ uctx->cntxt_pd->ibpd.device = &dev->ibdev;
+err:
+ return status;
+}
+
+static int ocrdma_dealloc_ucontext_pd(struct ocrdma_ucontext *uctx)
+{
+ struct ocrdma_pd *pd = uctx->cntxt_pd;
+ struct ocrdma_dev *dev = get_ocrdma_dev(pd->ibpd.device);
+
+ if (uctx->pd_in_use) {
+ pr_err("%s(%d) Freeing in use pdid=0x%x.\n",
+ __func__, dev->id, pd->id);
+ }
+ uctx->cntxt_pd = NULL;
+ (void)_ocrdma_dealloc_pd(dev, pd);
+ return 0;
+}
+
+static struct ocrdma_pd *ocrdma_get_ucontext_pd(struct ocrdma_ucontext *uctx)
+{
+ struct ocrdma_pd *pd = NULL;
+
+ mutex_lock(&uctx->mm_list_lock);
+ if (!uctx->pd_in_use) {
+ uctx->pd_in_use = true;
+ pd = uctx->cntxt_pd;
+ }
+ mutex_unlock(&uctx->mm_list_lock);
+
+ return pd;
+}
+
+static void ocrdma_release_ucontext_pd(struct ocrdma_ucontext *uctx)
+{
+ mutex_lock(&uctx->mm_list_lock);
+ uctx->pd_in_use = false;
+ mutex_unlock(&uctx->mm_list_lock);
+}
+
+struct ib_ucontext *ocrdma_alloc_ucontext(struct ib_device *ibdev,
+ struct ib_udata *udata)
+{
+ int status;
+ struct ocrdma_ucontext *ctx;
+ struct ocrdma_alloc_ucontext_resp resp;
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
+ struct pci_dev *pdev = dev->nic_info.pdev;
+ u32 map_len = roundup(sizeof(u32) * 2048, PAGE_SIZE);
+
+ if (!udata)
+ return ERR_PTR(-EFAULT);
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return ERR_PTR(-ENOMEM);
+ INIT_LIST_HEAD(&ctx->mm_head);
+ mutex_init(&ctx->mm_list_lock);
+
+ ctx->ah_tbl.va = dma_alloc_coherent(&pdev->dev, map_len,
+ &ctx->ah_tbl.pa, GFP_KERNEL);
+ if (!ctx->ah_tbl.va) {
+ kfree(ctx);
+ return ERR_PTR(-ENOMEM);
+ }
+ memset(ctx->ah_tbl.va, 0, map_len);
+ ctx->ah_tbl.len = map_len;
+
+ memset(&resp, 0, sizeof(resp));
+ resp.ah_tbl_len = ctx->ah_tbl.len;
+ resp.ah_tbl_page = virt_to_phys(ctx->ah_tbl.va);
+
+ status = ocrdma_add_mmap(ctx, resp.ah_tbl_page, resp.ah_tbl_len);
+ if (status)
+ goto map_err;
+
+ status = ocrdma_alloc_ucontext_pd(dev, ctx, udata);
+ if (status)
+ goto pd_err;
+
+ resp.dev_id = dev->id;
+ resp.max_inline_data = dev->attr.max_inline_data;
+ resp.wqe_size = dev->attr.wqe_size;
+ resp.rqe_size = dev->attr.rqe_size;
+ resp.dpp_wqe_size = dev->attr.wqe_size;
+
+ memcpy(resp.fw_ver, dev->attr.fw_ver, sizeof(resp.fw_ver));
+ status = ib_copy_to_udata(udata, &resp, sizeof(resp));
+ if (status)
+ goto cpy_err;
+ return &ctx->ibucontext;
+
+cpy_err:
+pd_err:
+ ocrdma_del_mmap(ctx, ctx->ah_tbl.pa, ctx->ah_tbl.len);
+map_err:
+ dma_free_coherent(&pdev->dev, ctx->ah_tbl.len, ctx->ah_tbl.va,
+ ctx->ah_tbl.pa);
+ kfree(ctx);
+ return ERR_PTR(status);
+}
+
+int ocrdma_dealloc_ucontext(struct ib_ucontext *ibctx)
+{
+ int status = 0;
+ struct ocrdma_mm *mm, *tmp;
+ struct ocrdma_ucontext *uctx = get_ocrdma_ucontext(ibctx);
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibctx->device);
+ struct pci_dev *pdev = dev->nic_info.pdev;
+
+ status = ocrdma_dealloc_ucontext_pd(uctx);
+
+ ocrdma_del_mmap(uctx, uctx->ah_tbl.pa, uctx->ah_tbl.len);
+ dma_free_coherent(&pdev->dev, uctx->ah_tbl.len, uctx->ah_tbl.va,
+ uctx->ah_tbl.pa);
+
+ list_for_each_entry_safe(mm, tmp, &uctx->mm_head, entry) {
+ list_del(&mm->entry);
+ kfree(mm);
+ }
+ kfree(uctx);
+ return status;
+}
+
+int ocrdma_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
+{
+ struct ocrdma_ucontext *ucontext = get_ocrdma_ucontext(context);
+ struct ocrdma_dev *dev = get_ocrdma_dev(context->device);
+ unsigned long vm_page = vma->vm_pgoff << PAGE_SHIFT;
+ u64 unmapped_db = (u64) dev->nic_info.unmapped_db;
+ unsigned long len = (vma->vm_end - vma->vm_start);
+ int status = 0;
+ bool found;
+
+ if (vma->vm_start & (PAGE_SIZE - 1))
+ return -EINVAL;
+ found = ocrdma_search_mmap(ucontext, vma->vm_pgoff << PAGE_SHIFT, len);
+ if (!found)
+ return -EINVAL;
+
+ if ((vm_page >= unmapped_db) && (vm_page <= (unmapped_db +
+ dev->nic_info.db_total_size)) &&
+ (len <= dev->nic_info.db_page_size)) {
+ if (vma->vm_flags & VM_READ)
+ return -EPERM;
+
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ status = io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
+ len, vma->vm_page_prot);
+ } else if (dev->nic_info.dpp_unmapped_len &&
+ (vm_page >= (u64) dev->nic_info.dpp_unmapped_addr) &&
+ (vm_page <= (u64) (dev->nic_info.dpp_unmapped_addr +
+ dev->nic_info.dpp_unmapped_len)) &&
+ (len <= dev->nic_info.dpp_unmapped_len)) {
+ if (vma->vm_flags & VM_READ)
+ return -EPERM;
+
+ vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+ status = io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
+ len, vma->vm_page_prot);
+ } else {
+ status = remap_pfn_range(vma, vma->vm_start,
+ vma->vm_pgoff, len, vma->vm_page_prot);
+ }
+ return status;
+}
+
+static int ocrdma_copy_pd_uresp(struct ocrdma_dev *dev, struct ocrdma_pd *pd,
+ struct ib_ucontext *ib_ctx,
+ struct ib_udata *udata)
+{
+ int status;
+ u64 db_page_addr;
+ u64 dpp_page_addr = 0;
+ u32 db_page_size;
+ struct ocrdma_alloc_pd_uresp rsp;
+ struct ocrdma_ucontext *uctx = get_ocrdma_ucontext(ib_ctx);
+
+ memset(&rsp, 0, sizeof(rsp));
+ rsp.id = pd->id;
+ rsp.dpp_enabled = pd->dpp_enabled;
+ db_page_addr = ocrdma_get_db_addr(dev, pd->id);
+ db_page_size = dev->nic_info.db_page_size;
+
+ status = ocrdma_add_mmap(uctx, db_page_addr, db_page_size);
+ if (status)
+ return status;
+
+ if (pd->dpp_enabled) {
+ dpp_page_addr = dev->nic_info.dpp_unmapped_addr +
+ (pd->id * PAGE_SIZE);
+ status = ocrdma_add_mmap(uctx, dpp_page_addr,
+ PAGE_SIZE);
+ if (status)
+ goto dpp_map_err;
+ rsp.dpp_page_addr_hi = upper_32_bits(dpp_page_addr);
+ rsp.dpp_page_addr_lo = dpp_page_addr;
+ }
+
+ status = ib_copy_to_udata(udata, &rsp, sizeof(rsp));
+ if (status)
+ goto ucopy_err;
+
+ pd->uctx = uctx;
+ return 0;
+
+ucopy_err:
+ if (pd->dpp_enabled)
+ ocrdma_del_mmap(pd->uctx, dpp_page_addr, PAGE_SIZE);
+dpp_map_err:
+ ocrdma_del_mmap(pd->uctx, db_page_addr, db_page_size);
+ return status;
+}
+
+struct ib_pd *ocrdma_alloc_pd(struct ib_device *ibdev,
+ struct ib_ucontext *context,
+ struct ib_udata *udata)
+{
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
+ struct ocrdma_pd *pd;
+ struct ocrdma_ucontext *uctx = NULL;
+ int status;
+ u8 is_uctx_pd = false;
+
+ if (udata && context) {
+ uctx = get_ocrdma_ucontext(context);
+ pd = ocrdma_get_ucontext_pd(uctx);
+ if (pd) {
+ is_uctx_pd = true;
+ goto pd_mapping;
+ }
+ }
+
+ pd = _ocrdma_alloc_pd(dev, uctx, udata);
+ if (IS_ERR(pd)) {
+ status = PTR_ERR(pd);
+ goto exit;
+ }
+
+pd_mapping:
+ if (udata && context) {
+ status = ocrdma_copy_pd_uresp(dev, pd, context, udata);
+ if (status)
+ goto err;
+ }
+ return &pd->ibpd;
+
+err:
+ if (is_uctx_pd) {
+ ocrdma_release_ucontext_pd(uctx);
+ } else {
+ status = _ocrdma_dealloc_pd(dev, pd);
+ kfree(pd);
+ }
+exit:
+ return ERR_PTR(status);
+}
+
+int ocrdma_dealloc_pd(struct ib_pd *ibpd)
+{
+ struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
+ struct ocrdma_ucontext *uctx = NULL;
+ int status = 0;
+ u64 usr_db;
+
+ uctx = pd->uctx;
+ if (uctx) {
+ u64 dpp_db = dev->nic_info.dpp_unmapped_addr +
+ (pd->id * PAGE_SIZE);
+ if (pd->dpp_enabled)
+ ocrdma_del_mmap(pd->uctx, dpp_db, PAGE_SIZE);
+ usr_db = ocrdma_get_db_addr(dev, pd->id);
+ ocrdma_del_mmap(pd->uctx, usr_db, dev->nic_info.db_page_size);
+
+ if (is_ucontext_pd(uctx, pd)) {
+ ocrdma_release_ucontext_pd(uctx);
+ return status;
+ }
+ }
+ status = _ocrdma_dealloc_pd(dev, pd);
+ return status;
+}
+
+static int ocrdma_alloc_lkey(struct ocrdma_dev *dev, struct ocrdma_mr *mr,
+ u32 pdid, int acc, u32 num_pbls, u32 addr_check)
+{
+ int status;
+
+ mr->hwmr.fr_mr = 0;
+ mr->hwmr.local_rd = 1;
+ mr->hwmr.remote_rd = (acc & IB_ACCESS_REMOTE_READ) ? 1 : 0;
+ mr->hwmr.remote_wr = (acc & IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
+ mr->hwmr.local_wr = (acc & IB_ACCESS_LOCAL_WRITE) ? 1 : 0;
+ mr->hwmr.mw_bind = (acc & IB_ACCESS_MW_BIND) ? 1 : 0;
+ mr->hwmr.remote_atomic = (acc & IB_ACCESS_REMOTE_ATOMIC) ? 1 : 0;
+ mr->hwmr.num_pbls = num_pbls;
+
+ status = ocrdma_mbx_alloc_lkey(dev, &mr->hwmr, pdid, addr_check);
+ if (status)
+ return status;
+
+ mr->ibmr.lkey = mr->hwmr.lkey;
+ if (mr->hwmr.remote_wr || mr->hwmr.remote_rd)
+ mr->ibmr.rkey = mr->hwmr.lkey;
+ return 0;
+}
+
+struct ib_mr *ocrdma_get_dma_mr(struct ib_pd *ibpd, int acc)
+{
+ int status;
+ struct ocrdma_mr *mr;
+ struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
+
+ if (acc & IB_ACCESS_REMOTE_WRITE && !(acc & IB_ACCESS_LOCAL_WRITE)) {
+ pr_err("%s err, invalid access rights\n", __func__);
+ return ERR_PTR(-EINVAL);
+ }
+
+ mr = kzalloc(sizeof(*mr), GFP_KERNEL);
+ if (!mr)
+ return ERR_PTR(-ENOMEM);
+
+ status = ocrdma_alloc_lkey(dev, mr, pd->id, acc, 0,
+ OCRDMA_ADDR_CHECK_DISABLE);
+ if (status) {
+ kfree(mr);
+ return ERR_PTR(status);
+ }
+
+ return &mr->ibmr;
+}
+
+static void ocrdma_free_mr_pbl_tbl(struct ocrdma_dev *dev,
+ struct ocrdma_hw_mr *mr)
+{
+ struct pci_dev *pdev = dev->nic_info.pdev;
+ int i = 0;
+
+ if (mr->pbl_table) {
+ for (i = 0; i < mr->num_pbls; i++) {
+ if (!mr->pbl_table[i].va)
+ continue;
+ dma_free_coherent(&pdev->dev, mr->pbl_size,
+ mr->pbl_table[i].va,
+ mr->pbl_table[i].pa);
+ }
+ kfree(mr->pbl_table);
+ mr->pbl_table = NULL;
+ }
+}
+
+static int ocrdma_get_pbl_info(struct ocrdma_dev *dev, struct ocrdma_mr *mr,
+ u32 num_pbes)
+{
+ u32 num_pbls = 0;
+ u32 idx = 0;
+ int status = 0;
+ u32 pbl_size;
+
+ do {
+ pbl_size = OCRDMA_MIN_HPAGE_SIZE * (1 << idx);
+ if (pbl_size > MAX_OCRDMA_PBL_SIZE) {
+ status = -EFAULT;
+ break;
+ }
+ num_pbls = roundup(num_pbes, (pbl_size / sizeof(u64)));
+ num_pbls = num_pbls / (pbl_size / sizeof(u64));
+ idx++;
+ } while (num_pbls >= dev->attr.max_num_mr_pbl);
+
+ mr->hwmr.num_pbes = num_pbes;
+ mr->hwmr.num_pbls = num_pbls;
+ mr->hwmr.pbl_size = pbl_size;
+ return status;
+}
+
+static int ocrdma_build_pbl_tbl(struct ocrdma_dev *dev, struct ocrdma_hw_mr *mr)
+{
+ int status = 0;
+ int i;
+ u32 dma_len = mr->pbl_size;
+ struct pci_dev *pdev = dev->nic_info.pdev;
+ void *va;
+ dma_addr_t pa;
+
+ mr->pbl_table = kzalloc(sizeof(struct ocrdma_pbl) *
+ mr->num_pbls, GFP_KERNEL);
+
+ if (!mr->pbl_table)
+ return -ENOMEM;
+
+ for (i = 0; i < mr->num_pbls; i++) {
+ va = dma_alloc_coherent(&pdev->dev, dma_len, &pa, GFP_KERNEL);
+ if (!va) {
+ ocrdma_free_mr_pbl_tbl(dev, mr);
+ status = -ENOMEM;
+ break;
+ }
+ memset(va, 0, dma_len);
+ mr->pbl_table[i].va = va;
+ mr->pbl_table[i].pa = pa;
+ }
+ return status;
+}
+
+static void build_user_pbes(struct ocrdma_dev *dev, struct ocrdma_mr *mr,
+ u32 num_pbes)
+{
+ struct ocrdma_pbe *pbe;
+ struct scatterlist *sg;
+ struct ocrdma_pbl *pbl_tbl = mr->hwmr.pbl_table;
+ struct ib_umem *umem = mr->umem;
+ int shift, pg_cnt, pages, pbe_cnt, entry, total_num_pbes = 0;
+
+ if (!mr->hwmr.num_pbes)
+ return;
+
+ pbe = (struct ocrdma_pbe *)pbl_tbl->va;
+ pbe_cnt = 0;
+
+ shift = ilog2(umem->page_size);
+
+ for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
+ pages = sg_dma_len(sg) >> shift;
+ for (pg_cnt = 0; pg_cnt < pages; pg_cnt++) {
+ /* store the page address in pbe */
+ pbe->pa_lo =
+ cpu_to_le32(sg_dma_address
+ (sg) +
+ (umem->page_size * pg_cnt));
+ pbe->pa_hi =
+ cpu_to_le32(upper_32_bits
+ ((sg_dma_address
+ (sg) +
+ umem->page_size * pg_cnt)));
+ pbe_cnt += 1;
+ total_num_pbes += 1;
+ pbe++;
+
+ /* if done building pbes, issue the mbx cmd. */
+ if (total_num_pbes == num_pbes)
+ return;
+
+ /* if the given pbl is full storing the pbes,
+ * move to next pbl.
+ */
+ if (pbe_cnt ==
+ (mr->hwmr.pbl_size / sizeof(u64))) {
+ pbl_tbl++;
+ pbe = (struct ocrdma_pbe *)pbl_tbl->va;
+ pbe_cnt = 0;
+ }
+
+ }
+ }
+}
+
+struct ib_mr *ocrdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
+ u64 usr_addr, int acc, struct ib_udata *udata)
+{
+ int status = -ENOMEM;
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
+ struct ocrdma_mr *mr;
+ struct ocrdma_pd *pd;
+ u32 num_pbes;
+
+ pd = get_ocrdma_pd(ibpd);
+
+ if (acc & IB_ACCESS_REMOTE_WRITE && !(acc & IB_ACCESS_LOCAL_WRITE))
+ return ERR_PTR(-EINVAL);
+
+ mr = kzalloc(sizeof(*mr), GFP_KERNEL);
+ if (!mr)
+ return ERR_PTR(status);
+ mr->umem = ib_umem_get(ibpd->uobject->context, start, len, acc, 0);
+ if (IS_ERR(mr->umem)) {
+ status = -EFAULT;
+ goto umem_err;
+ }
+ num_pbes = ib_umem_page_count(mr->umem);
+ status = ocrdma_get_pbl_info(dev, mr, num_pbes);
+ if (status)
+ goto umem_err;
+
+ mr->hwmr.pbe_size = mr->umem->page_size;
+ mr->hwmr.fbo = ib_umem_offset(mr->umem);
+ mr->hwmr.va = usr_addr;
+ mr->hwmr.len = len;
+ mr->hwmr.remote_wr = (acc & IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
+ mr->hwmr.remote_rd = (acc & IB_ACCESS_REMOTE_READ) ? 1 : 0;
+ mr->hwmr.local_wr = (acc & IB_ACCESS_LOCAL_WRITE) ? 1 : 0;
+ mr->hwmr.local_rd = 1;
+ mr->hwmr.remote_atomic = (acc & IB_ACCESS_REMOTE_ATOMIC) ? 1 : 0;
+ status = ocrdma_build_pbl_tbl(dev, &mr->hwmr);
+ if (status)
+ goto umem_err;
+ build_user_pbes(dev, mr, num_pbes);
+ status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, acc);
+ if (status)
+ goto mbx_err;
+ mr->ibmr.lkey = mr->hwmr.lkey;
+ if (mr->hwmr.remote_wr || mr->hwmr.remote_rd)
+ mr->ibmr.rkey = mr->hwmr.lkey;
+
+ return &mr->ibmr;
+
+mbx_err:
+ ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
+umem_err:
+ kfree(mr);
+ return ERR_PTR(status);
+}
+
+int ocrdma_dereg_mr(struct ib_mr *ib_mr)
+{
+ struct ocrdma_mr *mr = get_ocrdma_mr(ib_mr);
+ struct ocrdma_dev *dev = get_ocrdma_dev(ib_mr->device);
+
+ (void) ocrdma_mbx_dealloc_lkey(dev, mr->hwmr.fr_mr, mr->hwmr.lkey);
+
+ ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
+
+ /* it could be user registered memory. */
+ if (mr->umem)
+ ib_umem_release(mr->umem);
+ kfree(mr);
+
+ /* Don't stop cleanup, in case FW is unresponsive */
+ if (dev->mqe_ctx.fw_error_state) {
+ pr_err("%s(%d) fw not responding.\n",
+ __func__, dev->id);
+ }
+ return 0;
+}
+
+static int ocrdma_copy_cq_uresp(struct ocrdma_dev *dev, struct ocrdma_cq *cq,
+ struct ib_udata *udata,
+ struct ib_ucontext *ib_ctx)
+{
+ int status;
+ struct ocrdma_ucontext *uctx = get_ocrdma_ucontext(ib_ctx);
+ struct ocrdma_create_cq_uresp uresp;
+
+ memset(&uresp, 0, sizeof(uresp));
+ uresp.cq_id = cq->id;
+ uresp.page_size = PAGE_ALIGN(cq->len);
+ uresp.num_pages = 1;
+ uresp.max_hw_cqe = cq->max_hw_cqe;
+ uresp.page_addr[0] = virt_to_phys(cq->va);
+ uresp.db_page_addr = ocrdma_get_db_addr(dev, uctx->cntxt_pd->id);
+ uresp.db_page_size = dev->nic_info.db_page_size;
+ uresp.phase_change = cq->phase_change ? 1 : 0;
+ status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
+ if (status) {
+ pr_err("%s(%d) copy error cqid=0x%x.\n",
+ __func__, dev->id, cq->id);
+ goto err;
+ }
+ status = ocrdma_add_mmap(uctx, uresp.db_page_addr, uresp.db_page_size);
+ if (status)
+ goto err;
+ status = ocrdma_add_mmap(uctx, uresp.page_addr[0], uresp.page_size);
+ if (status) {
+ ocrdma_del_mmap(uctx, uresp.db_page_addr, uresp.db_page_size);
+ goto err;
+ }
+ cq->ucontext = uctx;
+err:
+ return status;
+}
+
+struct ib_cq *ocrdma_create_cq(struct ib_device *ibdev, int entries, int vector,
+ struct ib_ucontext *ib_ctx,
+ struct ib_udata *udata)
+{
+ struct ocrdma_cq *cq;
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
+ struct ocrdma_ucontext *uctx = NULL;
+ u16 pd_id = 0;
+ int status;
+ struct ocrdma_create_cq_ureq ureq;
+
+ if (udata) {
+ if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
+ return ERR_PTR(-EFAULT);
+ } else
+ ureq.dpp_cq = 0;
+ cq = kzalloc(sizeof(*cq), GFP_KERNEL);
+ if (!cq)
+ return ERR_PTR(-ENOMEM);
+
+ spin_lock_init(&cq->cq_lock);
+ spin_lock_init(&cq->comp_handler_lock);
+ INIT_LIST_HEAD(&cq->sq_head);
+ INIT_LIST_HEAD(&cq->rq_head);
+ cq->first_arm = true;
+
+ if (ib_ctx) {
+ uctx = get_ocrdma_ucontext(ib_ctx);
+ pd_id = uctx->cntxt_pd->id;
+ }
+
+ status = ocrdma_mbx_create_cq(dev, cq, entries, ureq.dpp_cq, pd_id);
+ if (status) {
+ kfree(cq);
+ return ERR_PTR(status);
+ }
+ if (ib_ctx) {
+ status = ocrdma_copy_cq_uresp(dev, cq, udata, ib_ctx);
+ if (status)
+ goto ctx_err;
+ }
+ cq->phase = OCRDMA_CQE_VALID;
+ dev->cq_tbl[cq->id] = cq;
+ return &cq->ibcq;
+
+ctx_err:
+ ocrdma_mbx_destroy_cq(dev, cq);
+ kfree(cq);
+ return ERR_PTR(status);
+}
+
+int ocrdma_resize_cq(struct ib_cq *ibcq, int new_cnt,
+ struct ib_udata *udata)
+{
+ int status = 0;
+ struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
+
+ if (new_cnt < 1 || new_cnt > cq->max_hw_cqe) {
+ status = -EINVAL;
+ return status;
+ }
+ ibcq->cqe = new_cnt;
+ return status;
+}
+
+static void ocrdma_flush_cq(struct ocrdma_cq *cq)
+{
+ int cqe_cnt;
+ int valid_count = 0;
+ unsigned long flags;
+
+ struct ocrdma_dev *dev = get_ocrdma_dev(cq->ibcq.device);
+ struct ocrdma_cqe *cqe = NULL;
+
+ cqe = cq->va;
+ cqe_cnt = cq->cqe_cnt;
+
+ /* Last irq might have scheduled a polling thread
+ * sync-up with it before hard flushing.
+ */
+ spin_lock_irqsave(&cq->cq_lock, flags);
+ while (cqe_cnt) {
+ if (is_cqe_valid(cq, cqe))
+ valid_count++;
+ cqe++;
+ cqe_cnt--;
+ }
+ ocrdma_ring_cq_db(dev, cq->id, false, false, valid_count);
+ spin_unlock_irqrestore(&cq->cq_lock, flags);
+}
+
+int ocrdma_destroy_cq(struct ib_cq *ibcq)
+{
+ struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
+ struct ocrdma_eq *eq = NULL;
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device);
+ int pdid = 0;
+ u32 irq, indx;
+
+ dev->cq_tbl[cq->id] = NULL;
+ indx = ocrdma_get_eq_table_index(dev, cq->eqn);
+ if (indx == -EINVAL)
+ BUG();
+
+ eq = &dev->eq_tbl[indx];
+ irq = ocrdma_get_irq(dev, eq);
+ synchronize_irq(irq);
+ ocrdma_flush_cq(cq);
+
+ (void)ocrdma_mbx_destroy_cq(dev, cq);
+ if (cq->ucontext) {
+ pdid = cq->ucontext->cntxt_pd->id;
+ ocrdma_del_mmap(cq->ucontext, (u64) cq->pa,
+ PAGE_ALIGN(cq->len));
+ ocrdma_del_mmap(cq->ucontext,
+ ocrdma_get_db_addr(dev, pdid),
+ dev->nic_info.db_page_size);
+ }
+
+ kfree(cq);
+ return 0;
+}
+
+static int ocrdma_add_qpn_map(struct ocrdma_dev *dev, struct ocrdma_qp *qp)
+{
+ int status = -EINVAL;
+
+ if (qp->id < OCRDMA_MAX_QP && dev->qp_tbl[qp->id] == NULL) {
+ dev->qp_tbl[qp->id] = qp;
+ status = 0;
+ }
+ return status;
+}
+
+static void ocrdma_del_qpn_map(struct ocrdma_dev *dev, struct ocrdma_qp *qp)
+{
+ dev->qp_tbl[qp->id] = NULL;
+}
+
+static int ocrdma_check_qp_params(struct ib_pd *ibpd, struct ocrdma_dev *dev,
+ struct ib_qp_init_attr *attrs)
+{
+ if ((attrs->qp_type != IB_QPT_GSI) &&
+ (attrs->qp_type != IB_QPT_RC) &&
+ (attrs->qp_type != IB_QPT_UC) &&
+ (attrs->qp_type != IB_QPT_UD)) {
+ pr_err("%s(%d) unsupported qp type=0x%x requested\n",
+ __func__, dev->id, attrs->qp_type);
+ return -EINVAL;
+ }
+ /* Skip the check for QP1 to support CM size of 128 */
+ if ((attrs->qp_type != IB_QPT_GSI) &&
+ (attrs->cap.max_send_wr > dev->attr.max_wqe)) {
+ pr_err("%s(%d) unsupported send_wr=0x%x requested\n",
+ __func__, dev->id, attrs->cap.max_send_wr);
+ pr_err("%s(%d) supported send_wr=0x%x\n",
+ __func__, dev->id, dev->attr.max_wqe);
+ return -EINVAL;
+ }
+ if (!attrs->srq && (attrs->cap.max_recv_wr > dev->attr.max_rqe)) {
+ pr_err("%s(%d) unsupported recv_wr=0x%x requested\n",
+ __func__, dev->id, attrs->cap.max_recv_wr);
+ pr_err("%s(%d) supported recv_wr=0x%x\n",
+ __func__, dev->id, dev->attr.max_rqe);
+ return -EINVAL;
+ }
+ if (attrs->cap.max_inline_data > dev->attr.max_inline_data) {
+ pr_err("%s(%d) unsupported inline data size=0x%x requested\n",
+ __func__, dev->id, attrs->cap.max_inline_data);
+ pr_err("%s(%d) supported inline data size=0x%x\n",
+ __func__, dev->id, dev->attr.max_inline_data);
+ return -EINVAL;
+ }
+ if (attrs->cap.max_send_sge > dev->attr.max_send_sge) {
+ pr_err("%s(%d) unsupported send_sge=0x%x requested\n",
+ __func__, dev->id, attrs->cap.max_send_sge);
+ pr_err("%s(%d) supported send_sge=0x%x\n",
+ __func__, dev->id, dev->attr.max_send_sge);
+ return -EINVAL;
+ }
+ if (attrs->cap.max_recv_sge > dev->attr.max_recv_sge) {
+ pr_err("%s(%d) unsupported recv_sge=0x%x requested\n",
+ __func__, dev->id, attrs->cap.max_recv_sge);
+ pr_err("%s(%d) supported recv_sge=0x%x\n",
+ __func__, dev->id, dev->attr.max_recv_sge);
+ return -EINVAL;
+ }
+ /* unprivileged user space cannot create special QP */
+ if (ibpd->uobject && attrs->qp_type == IB_QPT_GSI) {
+ pr_err
+ ("%s(%d) Userspace can't create special QPs of type=0x%x\n",
+ __func__, dev->id, attrs->qp_type);
+ return -EINVAL;
+ }
+ /* allow creating only one GSI type of QP */
+ if (attrs->qp_type == IB_QPT_GSI && dev->gsi_qp_created) {
+ pr_err("%s(%d) GSI special QPs already created.\n",
+ __func__, dev->id);
+ return -EINVAL;
+ }
+ /* verify consumer QPs are not trying to use GSI QP's CQ */
+ if ((attrs->qp_type != IB_QPT_GSI) && (dev->gsi_qp_created)) {
+ if ((dev->gsi_sqcq == get_ocrdma_cq(attrs->send_cq)) ||
+ (dev->gsi_rqcq == get_ocrdma_cq(attrs->recv_cq))) {
+ pr_err("%s(%d) Consumer QP cannot use GSI CQs.\n",
+ __func__, dev->id);
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+
+static int ocrdma_copy_qp_uresp(struct ocrdma_qp *qp,
+ struct ib_udata *udata, int dpp_offset,
+ int dpp_credit_lmt, int srq)
+{
+ int status = 0;
+ u64 usr_db;
+ struct ocrdma_create_qp_uresp uresp;
+ struct ocrdma_pd *pd = qp->pd;
+ struct ocrdma_dev *dev = get_ocrdma_dev(pd->ibpd.device);
+
+ memset(&uresp, 0, sizeof(uresp));
+ usr_db = dev->nic_info.unmapped_db +
+ (pd->id * dev->nic_info.db_page_size);
+ uresp.qp_id = qp->id;
+ uresp.sq_dbid = qp->sq.dbid;
+ uresp.num_sq_pages = 1;
+ uresp.sq_page_size = PAGE_ALIGN(qp->sq.len);
+ uresp.sq_page_addr[0] = virt_to_phys(qp->sq.va);
+ uresp.num_wqe_allocated = qp->sq.max_cnt;
+ if (!srq) {
+ uresp.rq_dbid = qp->rq.dbid;
+ uresp.num_rq_pages = 1;
+ uresp.rq_page_size = PAGE_ALIGN(qp->rq.len);
+ uresp.rq_page_addr[0] = virt_to_phys(qp->rq.va);
+ uresp.num_rqe_allocated = qp->rq.max_cnt;
+ }
+ uresp.db_page_addr = usr_db;
+ uresp.db_page_size = dev->nic_info.db_page_size;
+ uresp.db_sq_offset = OCRDMA_DB_GEN2_SQ_OFFSET;
+ uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ_OFFSET;
+ uresp.db_shift = OCRDMA_DB_RQ_SHIFT;
+
+ if (qp->dpp_enabled) {
+ uresp.dpp_credit = dpp_credit_lmt;
+ uresp.dpp_offset = dpp_offset;
+ }
+ status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
+ if (status) {
+ pr_err("%s(%d) user copy error.\n", __func__, dev->id);
+ goto err;
+ }
+ status = ocrdma_add_mmap(pd->uctx, uresp.sq_page_addr[0],
+ uresp.sq_page_size);
+ if (status)
+ goto err;
+
+ if (!srq) {
+ status = ocrdma_add_mmap(pd->uctx, uresp.rq_page_addr[0],
+ uresp.rq_page_size);
+ if (status)
+ goto rq_map_err;
+ }
+ return status;
+rq_map_err:
+ ocrdma_del_mmap(pd->uctx, uresp.sq_page_addr[0], uresp.sq_page_size);
+err:
+ return status;
+}
+
+static void ocrdma_set_qp_db(struct ocrdma_dev *dev, struct ocrdma_qp *qp,
+ struct ocrdma_pd *pd)
+{
+ if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
+ qp->sq_db = dev->nic_info.db +
+ (pd->id * dev->nic_info.db_page_size) +
+ OCRDMA_DB_GEN2_SQ_OFFSET;
+ qp->rq_db = dev->nic_info.db +
+ (pd->id * dev->nic_info.db_page_size) +
+ OCRDMA_DB_GEN2_RQ_OFFSET;
+ } else {
+ qp->sq_db = dev->nic_info.db +
+ (pd->id * dev->nic_info.db_page_size) +
+ OCRDMA_DB_SQ_OFFSET;
+ qp->rq_db = dev->nic_info.db +
+ (pd->id * dev->nic_info.db_page_size) +
+ OCRDMA_DB_RQ_OFFSET;
+ }
+}
+
+static int ocrdma_alloc_wr_id_tbl(struct ocrdma_qp *qp)
+{
+ qp->wqe_wr_id_tbl =
+ kzalloc(sizeof(*(qp->wqe_wr_id_tbl)) * qp->sq.max_cnt,
+ GFP_KERNEL);
+ if (qp->wqe_wr_id_tbl == NULL)
+ return -ENOMEM;
+ qp->rqe_wr_id_tbl =
+ kzalloc(sizeof(u64) * qp->rq.max_cnt, GFP_KERNEL);
+ if (qp->rqe_wr_id_tbl == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void ocrdma_set_qp_init_params(struct ocrdma_qp *qp,
+ struct ocrdma_pd *pd,
+ struct ib_qp_init_attr *attrs)
+{
+ qp->pd = pd;
+ spin_lock_init(&qp->q_lock);
+ INIT_LIST_HEAD(&qp->sq_entry);
+ INIT_LIST_HEAD(&qp->rq_entry);
+
+ qp->qp_type = attrs->qp_type;
+ qp->cap_flags = OCRDMA_QP_INB_RD | OCRDMA_QP_INB_WR;
+ qp->max_inline_data = attrs->cap.max_inline_data;
+ qp->sq.max_sges = attrs->cap.max_send_sge;
+ qp->rq.max_sges = attrs->cap.max_recv_sge;
+ qp->state = OCRDMA_QPS_RST;
+ qp->signaled = (attrs->sq_sig_type == IB_SIGNAL_ALL_WR) ? true : false;
+}
+
+static void ocrdma_store_gsi_qp_cq(struct ocrdma_dev *dev,
+ struct ib_qp_init_attr *attrs)
+{
+ if (attrs->qp_type == IB_QPT_GSI) {
+ dev->gsi_qp_created = 1;
+ dev->gsi_sqcq = get_ocrdma_cq(attrs->send_cq);
+ dev->gsi_rqcq = get_ocrdma_cq(attrs->recv_cq);
+ }
+}
+
+struct ib_qp *ocrdma_create_qp(struct ib_pd *ibpd,
+ struct ib_qp_init_attr *attrs,
+ struct ib_udata *udata)
+{
+ int status;
+ struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
+ struct ocrdma_qp *qp;
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
+ struct ocrdma_create_qp_ureq ureq;
+ u16 dpp_credit_lmt, dpp_offset;
+
+ status = ocrdma_check_qp_params(ibpd, dev, attrs);
+ if (status)
+ goto gen_err;
+
+ memset(&ureq, 0, sizeof(ureq));
+ if (udata) {
+ if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
+ return ERR_PTR(-EFAULT);
+ }
+ qp = kzalloc(sizeof(*qp), GFP_KERNEL);
+ if (!qp) {
+ status = -ENOMEM;
+ goto gen_err;
+ }
+ ocrdma_set_qp_init_params(qp, pd, attrs);
+ if (udata == NULL)
+ qp->cap_flags |= (OCRDMA_QP_MW_BIND | OCRDMA_QP_LKEY0 |
+ OCRDMA_QP_FAST_REG);
+
+ mutex_lock(&dev->dev_lock);
+ status = ocrdma_mbx_create_qp(qp, attrs, ureq.enable_dpp_cq,
+ ureq.dpp_cq_id,
+ &dpp_offset, &dpp_credit_lmt);
+ if (status)
+ goto mbx_err;
+
+ /* user space QP's wr_id table are managed in library */
+ if (udata == NULL) {
+ status = ocrdma_alloc_wr_id_tbl(qp);
+ if (status)
+ goto map_err;
+ }
+
+ status = ocrdma_add_qpn_map(dev, qp);
+ if (status)
+ goto map_err;
+ ocrdma_set_qp_db(dev, qp, pd);
+ if (udata) {
+ status = ocrdma_copy_qp_uresp(qp, udata, dpp_offset,
+ dpp_credit_lmt,
+ (attrs->srq != NULL));
+ if (status)
+ goto cpy_err;
+ }
+ ocrdma_store_gsi_qp_cq(dev, attrs);
+ qp->ibqp.qp_num = qp->id;
+ mutex_unlock(&dev->dev_lock);
+ return &qp->ibqp;
+
+cpy_err:
+ ocrdma_del_qpn_map(dev, qp);
+map_err:
+ ocrdma_mbx_destroy_qp(dev, qp);
+mbx_err:
+ mutex_unlock(&dev->dev_lock);
+ kfree(qp->wqe_wr_id_tbl);
+ kfree(qp->rqe_wr_id_tbl);
+ kfree(qp);
+ pr_err("%s(%d) error=%d\n", __func__, dev->id, status);
+gen_err:
+ return ERR_PTR(status);
+}
+
+int _ocrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int attr_mask)
+{
+ int status = 0;
+ struct ocrdma_qp *qp;
+ struct ocrdma_dev *dev;
+ enum ib_qp_state old_qps;
+
+ qp = get_ocrdma_qp(ibqp);
+ dev = get_ocrdma_dev(ibqp->device);
+ if (attr_mask & IB_QP_STATE)
+ status = ocrdma_qp_state_change(qp, attr->qp_state, &old_qps);
+ /* if new and previous states are same hw doesn't need to
+ * know about it.
+ */
+ if (status < 0)
+ return status;
+ status = ocrdma_mbx_modify_qp(dev, qp, attr, attr_mask);
+
+ return status;
+}
+
+int ocrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int attr_mask, struct ib_udata *udata)
+{
+ unsigned long flags;
+ int status = -EINVAL;
+ struct ocrdma_qp *qp;
+ struct ocrdma_dev *dev;
+ enum ib_qp_state old_qps, new_qps;
+
+ qp = get_ocrdma_qp(ibqp);
+ dev = get_ocrdma_dev(ibqp->device);
+
+ /* syncronize with multiple context trying to change, retrive qps */
+ mutex_lock(&dev->dev_lock);
+ /* syncronize with wqe, rqe posting and cqe processing contexts */
+ spin_lock_irqsave(&qp->q_lock, flags);
+ old_qps = get_ibqp_state(qp->state);
+ if (attr_mask & IB_QP_STATE)
+ new_qps = attr->qp_state;
+ else
+ new_qps = old_qps;
+ spin_unlock_irqrestore(&qp->q_lock, flags);
+
+ if (!ib_modify_qp_is_ok(old_qps, new_qps, ibqp->qp_type, attr_mask,
+ IB_LINK_LAYER_ETHERNET)) {
+ pr_err("%s(%d) invalid attribute mask=0x%x specified for\n"
+ "qpn=0x%x of type=0x%x old_qps=0x%x, new_qps=0x%x\n",
+ __func__, dev->id, attr_mask, qp->id, ibqp->qp_type,
+ old_qps, new_qps);
+ goto param_err;
+ }
+
+ status = _ocrdma_modify_qp(ibqp, attr, attr_mask);
+ if (status > 0)
+ status = 0;
+param_err:
+ mutex_unlock(&dev->dev_lock);
+ return status;
+}
+
+static enum ib_mtu ocrdma_mtu_int_to_enum(u16 mtu)
+{
+ switch (mtu) {
+ case 256:
+ return IB_MTU_256;
+ case 512:
+ return IB_MTU_512;
+ case 1024:
+ return IB_MTU_1024;
+ case 2048:
+ return IB_MTU_2048;
+ case 4096:
+ return IB_MTU_4096;
+ default:
+ return IB_MTU_1024;
+ }
+}
+
+static int ocrdma_to_ib_qp_acc_flags(int qp_cap_flags)
+{
+ int ib_qp_acc_flags = 0;
+
+ if (qp_cap_flags & OCRDMA_QP_INB_WR)
+ ib_qp_acc_flags |= IB_ACCESS_REMOTE_WRITE;
+ if (qp_cap_flags & OCRDMA_QP_INB_RD)
+ ib_qp_acc_flags |= IB_ACCESS_LOCAL_WRITE;
+ return ib_qp_acc_flags;
+}
+
+int ocrdma_query_qp(struct ib_qp *ibqp,
+ struct ib_qp_attr *qp_attr,
+ int attr_mask, struct ib_qp_init_attr *qp_init_attr)
+{
+ int status;
+ u32 qp_state;
+ struct ocrdma_qp_params params;
+ struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibqp->device);
+
+ memset(¶ms, 0, sizeof(params));
+ mutex_lock(&dev->dev_lock);
+ status = ocrdma_mbx_query_qp(dev, qp, ¶ms);
+ mutex_unlock(&dev->dev_lock);
+ if (status)
+ goto mbx_err;
+ if (qp->qp_type == IB_QPT_UD)
+ qp_attr->qkey = params.qkey;
+ qp_attr->path_mtu =
+ ocrdma_mtu_int_to_enum(params.path_mtu_pkey_indx &
+ OCRDMA_QP_PARAMS_PATH_MTU_MASK) >>
+ OCRDMA_QP_PARAMS_PATH_MTU_SHIFT;
+ qp_attr->path_mig_state = IB_MIG_MIGRATED;
+ qp_attr->rq_psn = params.hop_lmt_rq_psn & OCRDMA_QP_PARAMS_RQ_PSN_MASK;
+ qp_attr->sq_psn = params.tclass_sq_psn & OCRDMA_QP_PARAMS_SQ_PSN_MASK;
+ qp_attr->dest_qp_num =
+ params.ack_to_rnr_rtc_dest_qpn & OCRDMA_QP_PARAMS_DEST_QPN_MASK;
+
+ qp_attr->qp_access_flags = ocrdma_to_ib_qp_acc_flags(qp->cap_flags);
+ qp_attr->cap.max_send_wr = qp->sq.max_cnt - 1;
+ qp_attr->cap.max_recv_wr = qp->rq.max_cnt - 1;
+ qp_attr->cap.max_send_sge = qp->sq.max_sges;
+ qp_attr->cap.max_recv_sge = qp->rq.max_sges;
+ qp_attr->cap.max_inline_data = qp->max_inline_data;
+ qp_init_attr->cap = qp_attr->cap;
+ memcpy(&qp_attr->ah_attr.grh.dgid, ¶ms.dgid[0],
+ sizeof(params.dgid));
+ qp_attr->ah_attr.grh.flow_label = params.rnt_rc_sl_fl &
+ OCRDMA_QP_PARAMS_FLOW_LABEL_MASK;
+ qp_attr->ah_attr.grh.sgid_index = qp->sgid_idx;
+ qp_attr->ah_attr.grh.hop_limit = (params.hop_lmt_rq_psn &
+ OCRDMA_QP_PARAMS_HOP_LMT_MASK) >>
+ OCRDMA_QP_PARAMS_HOP_LMT_SHIFT;
+ qp_attr->ah_attr.grh.traffic_class = (params.tclass_sq_psn &
+ OCRDMA_QP_PARAMS_TCLASS_MASK) >>
+ OCRDMA_QP_PARAMS_TCLASS_SHIFT;
+
+ qp_attr->ah_attr.ah_flags = IB_AH_GRH;
+ qp_attr->ah_attr.port_num = 1;
+ qp_attr->ah_attr.sl = (params.rnt_rc_sl_fl &
+ OCRDMA_QP_PARAMS_SL_MASK) >>
+ OCRDMA_QP_PARAMS_SL_SHIFT;
+ qp_attr->timeout = (params.ack_to_rnr_rtc_dest_qpn &
+ OCRDMA_QP_PARAMS_ACK_TIMEOUT_MASK) >>
+ OCRDMA_QP_PARAMS_ACK_TIMEOUT_SHIFT;
+ qp_attr->rnr_retry = (params.ack_to_rnr_rtc_dest_qpn &
+ OCRDMA_QP_PARAMS_RNR_RETRY_CNT_MASK) >>
+ OCRDMA_QP_PARAMS_RNR_RETRY_CNT_SHIFT;
+ qp_attr->retry_cnt =
+ (params.rnt_rc_sl_fl & OCRDMA_QP_PARAMS_RETRY_CNT_MASK) >>
+ OCRDMA_QP_PARAMS_RETRY_CNT_SHIFT;
+ qp_attr->min_rnr_timer = 0;
+ qp_attr->pkey_index = 0;
+ qp_attr->port_num = 1;
+ qp_attr->ah_attr.src_path_bits = 0;
+ qp_attr->ah_attr.static_rate = 0;
+ qp_attr->alt_pkey_index = 0;
+ qp_attr->alt_port_num = 0;
+ qp_attr->alt_timeout = 0;
+ memset(&qp_attr->alt_ah_attr, 0, sizeof(qp_attr->alt_ah_attr));
+ qp_state = (params.max_sge_recv_flags & OCRDMA_QP_PARAMS_STATE_MASK) >>
+ OCRDMA_QP_PARAMS_STATE_SHIFT;
+ qp_attr->qp_state = get_ibqp_state(qp_state);
+ qp_attr->cur_qp_state = qp_attr->qp_state;
+ qp_attr->sq_draining = (qp_state == OCRDMA_QPS_SQ_DRAINING) ? 1 : 0;
+ qp_attr->max_dest_rd_atomic =
+ params.max_ord_ird >> OCRDMA_QP_PARAMS_MAX_ORD_SHIFT;
+ qp_attr->max_rd_atomic =
+ params.max_ord_ird & OCRDMA_QP_PARAMS_MAX_IRD_MASK;
+ qp_attr->en_sqd_async_notify = (params.max_sge_recv_flags &
+ OCRDMA_QP_PARAMS_FLAGS_SQD_ASYNC) ? 1 : 0;
+ /* Sync driver QP state with FW */
+ ocrdma_qp_state_change(qp, qp_attr->qp_state, NULL);
+mbx_err:
+ return status;
+}
+
+static void ocrdma_srq_toggle_bit(struct ocrdma_srq *srq, unsigned int idx)
+{
+ unsigned int i = idx / 32;
+ u32 mask = (1U << (idx % 32));
+
+ srq->idx_bit_fields[i] ^= mask;
+}
+
+static int ocrdma_hwq_free_cnt(struct ocrdma_qp_hwq_info *q)
+{
+ return ((q->max_wqe_idx - q->head) + q->tail) % q->max_cnt;
+}
+
+static int is_hw_sq_empty(struct ocrdma_qp *qp)
+{
+ return (qp->sq.tail == qp->sq.head);
+}
+
+static int is_hw_rq_empty(struct ocrdma_qp *qp)
+{
+ return (qp->rq.tail == qp->rq.head);
+}
+
+static void *ocrdma_hwq_head(struct ocrdma_qp_hwq_info *q)
+{
+ return q->va + (q->head * q->entry_size);
+}
+
+static void *ocrdma_hwq_head_from_idx(struct ocrdma_qp_hwq_info *q,
+ u32 idx)
+{
+ return q->va + (idx * q->entry_size);
+}
+
+static void ocrdma_hwq_inc_head(struct ocrdma_qp_hwq_info *q)
+{
+ q->head = (q->head + 1) & q->max_wqe_idx;
+}
+
+static void ocrdma_hwq_inc_tail(struct ocrdma_qp_hwq_info *q)
+{
+ q->tail = (q->tail + 1) & q->max_wqe_idx;
+}
+
+/* discard the cqe for a given QP */
+static void ocrdma_discard_cqes(struct ocrdma_qp *qp, struct ocrdma_cq *cq)
+{
+ unsigned long cq_flags;
+ unsigned long flags;
+ int discard_cnt = 0;
+ u32 cur_getp, stop_getp;
+ struct ocrdma_cqe *cqe;
+ u32 qpn = 0, wqe_idx = 0;
+
+ spin_lock_irqsave(&cq->cq_lock, cq_flags);
+
+ /* traverse through the CQEs in the hw CQ,
+ * find the matching CQE for a given qp,
+ * mark the matching one discarded by clearing qpn.
+ * ring the doorbell in the poll_cq() as
+ * we don't complete out of order cqe.
+ */
+
+ cur_getp = cq->getp;
+ /* find upto when do we reap the cq. */
+ stop_getp = cur_getp;
+ do {
+ if (is_hw_sq_empty(qp) && (!qp->srq && is_hw_rq_empty(qp)))
+ break;
+
+ cqe = cq->va + cur_getp;
+ /* if (a) done reaping whole hw cq, or
+ * (b) qp_xq becomes empty.
+ * then exit
+ */
+ qpn = cqe->cmn.qpn & OCRDMA_CQE_QPN_MASK;
+ /* if previously discarded cqe found, skip that too. */
+ /* check for matching qp */
+ if (qpn == 0 || qpn != qp->id)
+ goto skip_cqe;
+
+ if (is_cqe_for_sq(cqe)) {
+ ocrdma_hwq_inc_tail(&qp->sq);
+ } else {
+ if (qp->srq) {
+ wqe_idx = (le32_to_cpu(cqe->rq.buftag_qpn) >>
+ OCRDMA_CQE_BUFTAG_SHIFT) &
+ qp->srq->rq.max_wqe_idx;
+ if (wqe_idx < 1)
+ BUG();
+ spin_lock_irqsave(&qp->srq->q_lock, flags);
+ ocrdma_hwq_inc_tail(&qp->srq->rq);
+ ocrdma_srq_toggle_bit(qp->srq, wqe_idx - 1);
+ spin_unlock_irqrestore(&qp->srq->q_lock, flags);
+
+ } else {
+ ocrdma_hwq_inc_tail(&qp->rq);
+ }
+ }
+ /* mark cqe discarded so that it is not picked up later
+ * in the poll_cq().
+ */
+ discard_cnt += 1;
+ cqe->cmn.qpn = 0;
+skip_cqe:
+ cur_getp = (cur_getp + 1) % cq->max_hw_cqe;
+ } while (cur_getp != stop_getp);
+ spin_unlock_irqrestore(&cq->cq_lock, cq_flags);
+}
+
+void ocrdma_del_flush_qp(struct ocrdma_qp *qp)
+{
+ int found = false;
+ unsigned long flags;
+ struct ocrdma_dev *dev = get_ocrdma_dev(qp->ibqp.device);
+ /* sync with any active CQ poll */
+
+ spin_lock_irqsave(&dev->flush_q_lock, flags);
+ found = ocrdma_is_qp_in_sq_flushlist(qp->sq_cq, qp);
+ if (found)
+ list_del(&qp->sq_entry);
+ if (!qp->srq) {
+ found = ocrdma_is_qp_in_rq_flushlist(qp->rq_cq, qp);
+ if (found)
+ list_del(&qp->rq_entry);
+ }
+ spin_unlock_irqrestore(&dev->flush_q_lock, flags);
+}
+
+int ocrdma_destroy_qp(struct ib_qp *ibqp)
+{
+ struct ocrdma_pd *pd;
+ struct ocrdma_qp *qp;
+ struct ocrdma_dev *dev;
+ struct ib_qp_attr attrs;
+ int attr_mask;
+ unsigned long flags;
+
+ qp = get_ocrdma_qp(ibqp);
+ dev = get_ocrdma_dev(ibqp->device);
+
+ pd = qp->pd;
+
+ /* change the QP state to ERROR */
+ if (qp->state != OCRDMA_QPS_RST) {
+ attrs.qp_state = IB_QPS_ERR;
+ attr_mask = IB_QP_STATE;
+ _ocrdma_modify_qp(ibqp, &attrs, attr_mask);
+ }
+ /* ensure that CQEs for newly created QP (whose id may be same with
+ * one which just getting destroyed are same), dont get
+ * discarded until the old CQEs are discarded.
+ */
+ mutex_lock(&dev->dev_lock);
+ (void) ocrdma_mbx_destroy_qp(dev, qp);
+
+ /*
+ * acquire CQ lock while destroy is in progress, in order to
+ * protect against proessing in-flight CQEs for this QP.
+ */
+ spin_lock_irqsave(&qp->sq_cq->cq_lock, flags);
+ if (qp->rq_cq && (qp->rq_cq != qp->sq_cq))
+ spin_lock(&qp->rq_cq->cq_lock);
+
+ ocrdma_del_qpn_map(dev, qp);
+
+ if (qp->rq_cq && (qp->rq_cq != qp->sq_cq))
+ spin_unlock(&qp->rq_cq->cq_lock);
+ spin_unlock_irqrestore(&qp->sq_cq->cq_lock, flags);
+
+ if (!pd->uctx) {
+ ocrdma_discard_cqes(qp, qp->sq_cq);
+ ocrdma_discard_cqes(qp, qp->rq_cq);
+ }
+ mutex_unlock(&dev->dev_lock);
+
+ if (pd->uctx) {
+ ocrdma_del_mmap(pd->uctx, (u64) qp->sq.pa,
+ PAGE_ALIGN(qp->sq.len));
+ if (!qp->srq)
+ ocrdma_del_mmap(pd->uctx, (u64) qp->rq.pa,
+ PAGE_ALIGN(qp->rq.len));
+ }
+
+ ocrdma_del_flush_qp(qp);
+
+ kfree(qp->wqe_wr_id_tbl);
+ kfree(qp->rqe_wr_id_tbl);
+ kfree(qp);
+ return 0;
+}
+
+static int ocrdma_copy_srq_uresp(struct ocrdma_dev *dev, struct ocrdma_srq *srq,
+ struct ib_udata *udata)
+{
+ int status;
+ struct ocrdma_create_srq_uresp uresp;
+
+ memset(&uresp, 0, sizeof(uresp));
+ uresp.rq_dbid = srq->rq.dbid;
+ uresp.num_rq_pages = 1;
+ uresp.rq_page_addr[0] = virt_to_phys(srq->rq.va);
+ uresp.rq_page_size = srq->rq.len;
+ uresp.db_page_addr = dev->nic_info.unmapped_db +
+ (srq->pd->id * dev->nic_info.db_page_size);
+ uresp.db_page_size = dev->nic_info.db_page_size;
+ uresp.num_rqe_allocated = srq->rq.max_cnt;
+ if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
+ uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ_OFFSET;
+ uresp.db_shift = 24;
+ } else {
+ uresp.db_rq_offset = OCRDMA_DB_RQ_OFFSET;
+ uresp.db_shift = 16;
+ }
+
+ status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
+ if (status)
+ return status;
+ status = ocrdma_add_mmap(srq->pd->uctx, uresp.rq_page_addr[0],
+ uresp.rq_page_size);
+ if (status)
+ return status;
+ return status;
+}
+
+struct ib_srq *ocrdma_create_srq(struct ib_pd *ibpd,
+ struct ib_srq_init_attr *init_attr,
+ struct ib_udata *udata)
+{
+ int status = -ENOMEM;
+ struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
+ struct ocrdma_srq *srq;
+
+ if (init_attr->attr.max_sge > dev->attr.max_recv_sge)
+ return ERR_PTR(-EINVAL);
+ if (init_attr->attr.max_wr > dev->attr.max_rqe)
+ return ERR_PTR(-EINVAL);
+
+ srq = kzalloc(sizeof(*srq), GFP_KERNEL);
+ if (!srq)
+ return ERR_PTR(status);
+
+ spin_lock_init(&srq->q_lock);
+ srq->pd = pd;
+ srq->db = dev->nic_info.db + (pd->id * dev->nic_info.db_page_size);
+ status = ocrdma_mbx_create_srq(dev, srq, init_attr, pd);
+ if (status)
+ goto err;
+
+ if (udata == NULL) {
+ srq->rqe_wr_id_tbl = kzalloc(sizeof(u64) * srq->rq.max_cnt,
+ GFP_KERNEL);
+ if (srq->rqe_wr_id_tbl == NULL)
+ goto arm_err;
+
+ srq->bit_fields_len = (srq->rq.max_cnt / 32) +
+ (srq->rq.max_cnt % 32 ? 1 : 0);
+ srq->idx_bit_fields =
+ kmalloc(srq->bit_fields_len * sizeof(u32), GFP_KERNEL);
+ if (srq->idx_bit_fields == NULL)
+ goto arm_err;
+ memset(srq->idx_bit_fields, 0xff,
+ srq->bit_fields_len * sizeof(u32));
+ }
+
+ if (init_attr->attr.srq_limit) {
+ status = ocrdma_mbx_modify_srq(srq, &init_attr->attr);
+ if (status)
+ goto arm_err;
+ }
+
+ if (udata) {
+ status = ocrdma_copy_srq_uresp(dev, srq, udata);
+ if (status)
+ goto arm_err;
+ }
+
+ return &srq->ibsrq;
+
+arm_err:
+ ocrdma_mbx_destroy_srq(dev, srq);
+err:
+ kfree(srq->rqe_wr_id_tbl);
+ kfree(srq->idx_bit_fields);
+ kfree(srq);
+ return ERR_PTR(status);
+}
+
+int ocrdma_modify_srq(struct ib_srq *ibsrq,
+ struct ib_srq_attr *srq_attr,
+ enum ib_srq_attr_mask srq_attr_mask,
+ struct ib_udata *udata)
+{
+ int status = 0;
+ struct ocrdma_srq *srq;
+
+ srq = get_ocrdma_srq(ibsrq);
+ if (srq_attr_mask & IB_SRQ_MAX_WR)
+ status = -EINVAL;
+ else
+ status = ocrdma_mbx_modify_srq(srq, srq_attr);
+ return status;
+}
+
+int ocrdma_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr)
+{
+ int status;
+ struct ocrdma_srq *srq;
+
+ srq = get_ocrdma_srq(ibsrq);
+ status = ocrdma_mbx_query_srq(srq, srq_attr);
+ return status;
+}
+
+int ocrdma_destroy_srq(struct ib_srq *ibsrq)
+{
+ int status;
+ struct ocrdma_srq *srq;
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibsrq->device);
+
+ srq = get_ocrdma_srq(ibsrq);
+
+ status = ocrdma_mbx_destroy_srq(dev, srq);
+
+ if (srq->pd->uctx)
+ ocrdma_del_mmap(srq->pd->uctx, (u64) srq->rq.pa,
+ PAGE_ALIGN(srq->rq.len));
+
+ kfree(srq->idx_bit_fields);
+ kfree(srq->rqe_wr_id_tbl);
+ kfree(srq);
+ return status;
+}
+
+/* unprivileged verbs and their support functions. */
+static void ocrdma_build_ud_hdr(struct ocrdma_qp *qp,
+ struct ocrdma_hdr_wqe *hdr,
+ struct ib_send_wr *wr)
+{
+ struct ocrdma_ewqe_ud_hdr *ud_hdr =
+ (struct ocrdma_ewqe_ud_hdr *)(hdr + 1);
+ struct ocrdma_ah *ah = get_ocrdma_ah(wr->wr.ud.ah);
+
+ ud_hdr->rsvd_dest_qpn = wr->wr.ud.remote_qpn;
+ if (qp->qp_type == IB_QPT_GSI)
+ ud_hdr->qkey = qp->qkey;
+ else
+ ud_hdr->qkey = wr->wr.ud.remote_qkey;
+ ud_hdr->rsvd_ahid = ah->id;
+ if (ah->av->valid & OCRDMA_AV_VLAN_VALID)
+ hdr->cw |= (OCRDMA_FLAG_AH_VLAN_PR << OCRDMA_WQE_FLAGS_SHIFT);
+}
+
+static void ocrdma_build_sges(struct ocrdma_hdr_wqe *hdr,
+ struct ocrdma_sge *sge, int num_sge,
+ struct ib_sge *sg_list)
+{
+ int i;
+
+ for (i = 0; i < num_sge; i++) {
+ sge[i].lrkey = sg_list[i].lkey;
+ sge[i].addr_lo = sg_list[i].addr;
+ sge[i].addr_hi = upper_32_bits(sg_list[i].addr);
+ sge[i].len = sg_list[i].length;
+ hdr->total_len += sg_list[i].length;
+ }
+ if (num_sge == 0)
+ memset(sge, 0, sizeof(*sge));
+}
+
+static inline uint32_t ocrdma_sglist_len(struct ib_sge *sg_list, int num_sge)
+{
+ uint32_t total_len = 0, i;
+
+ for (i = 0; i < num_sge; i++)
+ total_len += sg_list[i].length;
+ return total_len;
+}
+
+
+static int ocrdma_build_inline_sges(struct ocrdma_qp *qp,
+ struct ocrdma_hdr_wqe *hdr,
+ struct ocrdma_sge *sge,
+ struct ib_send_wr *wr, u32 wqe_size)
+{
+ int i;
+ char *dpp_addr;
+
+ if (wr->send_flags & IB_SEND_INLINE && qp->qp_type != IB_QPT_UD) {
+ hdr->total_len = ocrdma_sglist_len(wr->sg_list, wr->num_sge);
+ if (unlikely(hdr->total_len > qp->max_inline_data)) {
+ pr_err("%s() supported_len=0x%x,\n"
+ " unsupported len req=0x%x\n", __func__,
+ qp->max_inline_data, hdr->total_len);
+ return -EINVAL;
+ }
+ dpp_addr = (char *)sge;
+ for (i = 0; i < wr->num_sge; i++) {
+ memcpy(dpp_addr,
+ (void *)(unsigned long)wr->sg_list[i].addr,
+ wr->sg_list[i].length);
+ dpp_addr += wr->sg_list[i].length;
+ }
+
+ wqe_size += roundup(hdr->total_len, OCRDMA_WQE_ALIGN_BYTES);
+ if (0 == hdr->total_len)
+ wqe_size += sizeof(struct ocrdma_sge);
+ hdr->cw |= (OCRDMA_TYPE_INLINE << OCRDMA_WQE_TYPE_SHIFT);
+ } else {
+ ocrdma_build_sges(hdr, sge, wr->num_sge, wr->sg_list);
+ if (wr->num_sge)
+ wqe_size += (wr->num_sge * sizeof(struct ocrdma_sge));
+ else
+ wqe_size += sizeof(struct ocrdma_sge);
+ hdr->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
+ }
+ hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
+ return 0;
+}
+
+static int ocrdma_build_send(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
+ struct ib_send_wr *wr)
+{
+ int status;
+ struct ocrdma_sge *sge;
+ u32 wqe_size = sizeof(*hdr);
+
+ if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) {
+ ocrdma_build_ud_hdr(qp, hdr, wr);
+ sge = (struct ocrdma_sge *)(hdr + 2);
+ wqe_size += sizeof(struct ocrdma_ewqe_ud_hdr);
+ } else {
+ sge = (struct ocrdma_sge *)(hdr + 1);
+ }
+
+ status = ocrdma_build_inline_sges(qp, hdr, sge, wr, wqe_size);
+ return status;
+}
+
+static int ocrdma_build_write(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
+ struct ib_send_wr *wr)
+{
+ int status;
+ struct ocrdma_sge *ext_rw = (struct ocrdma_sge *)(hdr + 1);
+ struct ocrdma_sge *sge = ext_rw + 1;
+ u32 wqe_size = sizeof(*hdr) + sizeof(*ext_rw);
+
+ status = ocrdma_build_inline_sges(qp, hdr, sge, wr, wqe_size);
+ if (status)
+ return status;
+ ext_rw->addr_lo = wr->wr.rdma.remote_addr;
+ ext_rw->addr_hi = upper_32_bits(wr->wr.rdma.remote_addr);
+ ext_rw->lrkey = wr->wr.rdma.rkey;
+ ext_rw->len = hdr->total_len;
+ return 0;
+}
+
+static void ocrdma_build_read(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
+ struct ib_send_wr *wr)
+{
+ struct ocrdma_sge *ext_rw = (struct ocrdma_sge *)(hdr + 1);
+ struct ocrdma_sge *sge = ext_rw + 1;
+ u32 wqe_size = ((wr->num_sge + 1) * sizeof(struct ocrdma_sge)) +
+ sizeof(struct ocrdma_hdr_wqe);
+
+ ocrdma_build_sges(hdr, sge, wr->num_sge, wr->sg_list);
+ hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
+ hdr->cw |= (OCRDMA_READ << OCRDMA_WQE_OPCODE_SHIFT);
+ hdr->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
+
+ ext_rw->addr_lo = wr->wr.rdma.remote_addr;
+ ext_rw->addr_hi = upper_32_bits(wr->wr.rdma.remote_addr);
+ ext_rw->lrkey = wr->wr.rdma.rkey;
+ ext_rw->len = hdr->total_len;
+}
+
+static void build_frmr_pbes(struct ib_send_wr *wr, struct ocrdma_pbl *pbl_tbl,
+ struct ocrdma_hw_mr *hwmr)
+{
+ int i;
+ u64 buf_addr = 0;
+ int num_pbes;
+ struct ocrdma_pbe *pbe;
+
+ pbe = (struct ocrdma_pbe *)pbl_tbl->va;
+ num_pbes = 0;
+
+ /* go through the OS phy regions & fill hw pbe entries into pbls. */
+ for (i = 0; i < wr->wr.fast_reg.page_list_len; i++) {
+ /* number of pbes can be more for one OS buf, when
+ * buffers are of different sizes.
+ * split the ib_buf to one or more pbes.
+ */
+ buf_addr = wr->wr.fast_reg.page_list->page_list[i];
+ pbe->pa_lo = cpu_to_le32((u32) (buf_addr & PAGE_MASK));
+ pbe->pa_hi = cpu_to_le32((u32) upper_32_bits(buf_addr));
+ num_pbes += 1;
+ pbe++;
+
+ /* if the pbl is full storing the pbes,
+ * move to next pbl.
+ */
+ if (num_pbes == (hwmr->pbl_size/sizeof(u64))) {
+ pbl_tbl++;
+ pbe = (struct ocrdma_pbe *)pbl_tbl->va;
+ }
+ }
+ return;
+}
+
+static int get_encoded_page_size(int pg_sz)
+{
+ /* Max size is 256M 4096 << 16 */
+ int i = 0;
+ for (; i < 17; i++)
+ if (pg_sz == (4096 << i))
+ break;
+ return i;
+}
+
+
+static int ocrdma_build_fr(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
+ struct ib_send_wr *wr)
+{
+ u64 fbo;
+ struct ocrdma_ewqe_fr *fast_reg = (struct ocrdma_ewqe_fr *)(hdr + 1);
+ struct ocrdma_mr *mr;
+ struct ocrdma_dev *dev = get_ocrdma_dev(qp->ibqp.device);
+ u32 wqe_size = sizeof(*fast_reg) + sizeof(*hdr);
+
+ wqe_size = roundup(wqe_size, OCRDMA_WQE_ALIGN_BYTES);
+
+ if (wr->wr.fast_reg.page_list_len > dev->attr.max_pages_per_frmr)
+ return -EINVAL;
+
+ hdr->cw |= (OCRDMA_FR_MR << OCRDMA_WQE_OPCODE_SHIFT);
+ hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
+
+ if (wr->wr.fast_reg.page_list_len == 0)
+ BUG();
+ if (wr->wr.fast_reg.access_flags & IB_ACCESS_LOCAL_WRITE)
+ hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_LOCAL_WR;
+ if (wr->wr.fast_reg.access_flags & IB_ACCESS_REMOTE_WRITE)
+ hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_REMOTE_WR;
+ if (wr->wr.fast_reg.access_flags & IB_ACCESS_REMOTE_READ)
+ hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_REMOTE_RD;
+ hdr->lkey = wr->wr.fast_reg.rkey;
+ hdr->total_len = wr->wr.fast_reg.length;
+
+ fbo = wr->wr.fast_reg.iova_start -
+ (wr->wr.fast_reg.page_list->page_list[0] & PAGE_MASK);
+
+ fast_reg->va_hi = upper_32_bits(wr->wr.fast_reg.iova_start);
+ fast_reg->va_lo = (u32) (wr->wr.fast_reg.iova_start & 0xffffffff);
+ fast_reg->fbo_hi = upper_32_bits(fbo);
+ fast_reg->fbo_lo = (u32) fbo & 0xffffffff;
+ fast_reg->num_sges = wr->wr.fast_reg.page_list_len;
+ fast_reg->size_sge =
+ get_encoded_page_size(1 << wr->wr.fast_reg.page_shift);
+ mr = (struct ocrdma_mr *) (unsigned long)
+ dev->stag_arr[(hdr->lkey >> 8) & (OCRDMA_MAX_STAG - 1)];
+ build_frmr_pbes(wr, mr->hwmr.pbl_table, &mr->hwmr);
+ return 0;
+}
+
+static void ocrdma_ring_sq_db(struct ocrdma_qp *qp)
+{
+ u32 val = qp->sq.dbid | (1 << OCRDMA_DB_SQ_SHIFT);
+
+ iowrite32(val, qp->sq_db);
+}
+
+int ocrdma_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
+ struct ib_send_wr **bad_wr)
+{
+ int status = 0;
+ struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
+ struct ocrdma_hdr_wqe *hdr;
+ unsigned long flags;
+
+ spin_lock_irqsave(&qp->q_lock, flags);
+ if (qp->state != OCRDMA_QPS_RTS && qp->state != OCRDMA_QPS_SQD) {
+ spin_unlock_irqrestore(&qp->q_lock, flags);
+ *bad_wr = wr;
+ return -EINVAL;
+ }
+
+ while (wr) {
+ if (qp->qp_type == IB_QPT_UD &&
+ (wr->opcode != IB_WR_SEND &&
+ wr->opcode != IB_WR_SEND_WITH_IMM)) {
+ *bad_wr = wr;
+ status = -EINVAL;
+ break;
+ }
+ if (ocrdma_hwq_free_cnt(&qp->sq) == 0 ||
+ wr->num_sge > qp->sq.max_sges) {
+ *bad_wr = wr;
+ status = -ENOMEM;
+ break;
+ }
+ hdr = ocrdma_hwq_head(&qp->sq);
+ hdr->cw = 0;
+ if (wr->send_flags & IB_SEND_SIGNALED || qp->signaled)
+ hdr->cw |= (OCRDMA_FLAG_SIG << OCRDMA_WQE_FLAGS_SHIFT);
+ if (wr->send_flags & IB_SEND_FENCE)
+ hdr->cw |=
+ (OCRDMA_FLAG_FENCE_L << OCRDMA_WQE_FLAGS_SHIFT);
+ if (wr->send_flags & IB_SEND_SOLICITED)
+ hdr->cw |=
+ (OCRDMA_FLAG_SOLICIT << OCRDMA_WQE_FLAGS_SHIFT);
+ hdr->total_len = 0;
+ switch (wr->opcode) {
+ case IB_WR_SEND_WITH_IMM:
+ hdr->cw |= (OCRDMA_FLAG_IMM << OCRDMA_WQE_FLAGS_SHIFT);
+ hdr->immdt = ntohl(wr->ex.imm_data);
+ case IB_WR_SEND:
+ hdr->cw |= (OCRDMA_SEND << OCRDMA_WQE_OPCODE_SHIFT);
+ ocrdma_build_send(qp, hdr, wr);
+ break;
+ case IB_WR_SEND_WITH_INV:
+ hdr->cw |= (OCRDMA_FLAG_INV << OCRDMA_WQE_FLAGS_SHIFT);
+ hdr->cw |= (OCRDMA_SEND << OCRDMA_WQE_OPCODE_SHIFT);
+ hdr->lkey = wr->ex.invalidate_rkey;
+ status = ocrdma_build_send(qp, hdr, wr);
+ break;
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ hdr->cw |= (OCRDMA_FLAG_IMM << OCRDMA_WQE_FLAGS_SHIFT);
+ hdr->immdt = ntohl(wr->ex.imm_data);
+ case IB_WR_RDMA_WRITE:
+ hdr->cw |= (OCRDMA_WRITE << OCRDMA_WQE_OPCODE_SHIFT);
+ status = ocrdma_build_write(qp, hdr, wr);
+ break;
+ case IB_WR_RDMA_READ:
+ ocrdma_build_read(qp, hdr, wr);
+ break;
+ case IB_WR_LOCAL_INV:
+ hdr->cw |=
+ (OCRDMA_LKEY_INV << OCRDMA_WQE_OPCODE_SHIFT);
+ hdr->cw |= ((sizeof(struct ocrdma_hdr_wqe) +
+ sizeof(struct ocrdma_sge)) /
+ OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT;
+ hdr->lkey = wr->ex.invalidate_rkey;
+ break;
+ case IB_WR_FAST_REG_MR:
+ status = ocrdma_build_fr(qp, hdr, wr);
+ break;
+ default:
+ status = -EINVAL;
+ break;
+ }
+ if (status) {
+ *bad_wr = wr;
+ break;
+ }
+ if (wr->send_flags & IB_SEND_SIGNALED || qp->signaled)
+ qp->wqe_wr_id_tbl[qp->sq.head].signaled = 1;
+ else
+ qp->wqe_wr_id_tbl[qp->sq.head].signaled = 0;
+ qp->wqe_wr_id_tbl[qp->sq.head].wrid = wr->wr_id;
+ ocrdma_cpu_to_le32(hdr, ((hdr->cw >> OCRDMA_WQE_SIZE_SHIFT) &
+ OCRDMA_WQE_SIZE_MASK) * OCRDMA_WQE_STRIDE);
+ /* make sure wqe is written before adapter can access it */
+ wmb();
+ /* inform hw to start processing it */
+ ocrdma_ring_sq_db(qp);
+
+ /* update pointer, counter for next wr */
+ ocrdma_hwq_inc_head(&qp->sq);
+ wr = wr->next;
+ }
+ spin_unlock_irqrestore(&qp->q_lock, flags);
+ return status;
+}
+
+static void ocrdma_ring_rq_db(struct ocrdma_qp *qp)
+{
+ u32 val = qp->rq.dbid | (1 << OCRDMA_DB_RQ_SHIFT);
+
+ iowrite32(val, qp->rq_db);
+}
+
+static void ocrdma_build_rqe(struct ocrdma_hdr_wqe *rqe, struct ib_recv_wr *wr,
+ u16 tag)
+{
+ u32 wqe_size = 0;
+ struct ocrdma_sge *sge;
+ if (wr->num_sge)
+ wqe_size = (wr->num_sge * sizeof(*sge)) + sizeof(*rqe);
+ else
+ wqe_size = sizeof(*sge) + sizeof(*rqe);
+
+ rqe->cw = ((wqe_size / OCRDMA_WQE_STRIDE) <<
+ OCRDMA_WQE_SIZE_SHIFT);
+ rqe->cw |= (OCRDMA_FLAG_SIG << OCRDMA_WQE_FLAGS_SHIFT);
+ rqe->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
+ rqe->total_len = 0;
+ rqe->rsvd_tag = tag;
+ sge = (struct ocrdma_sge *)(rqe + 1);
+ ocrdma_build_sges(rqe, sge, wr->num_sge, wr->sg_list);
+ ocrdma_cpu_to_le32(rqe, wqe_size);
+}
+
+int ocrdma_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ int status = 0;
+ unsigned long flags;
+ struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
+ struct ocrdma_hdr_wqe *rqe;
+
+ spin_lock_irqsave(&qp->q_lock, flags);
+ if (qp->state == OCRDMA_QPS_RST || qp->state == OCRDMA_QPS_ERR) {
+ spin_unlock_irqrestore(&qp->q_lock, flags);
+ *bad_wr = wr;
+ return -EINVAL;
+ }
+ while (wr) {
+ if (ocrdma_hwq_free_cnt(&qp->rq) == 0 ||
+ wr->num_sge > qp->rq.max_sges) {
+ *bad_wr = wr;
+ status = -ENOMEM;
+ break;
+ }
+ rqe = ocrdma_hwq_head(&qp->rq);
+ ocrdma_build_rqe(rqe, wr, 0);
+
+ qp->rqe_wr_id_tbl[qp->rq.head] = wr->wr_id;
+ /* make sure rqe is written before adapter can access it */
+ wmb();
+
+ /* inform hw to start processing it */
+ ocrdma_ring_rq_db(qp);
+
+ /* update pointer, counter for next wr */
+ ocrdma_hwq_inc_head(&qp->rq);
+ wr = wr->next;
+ }
+ spin_unlock_irqrestore(&qp->q_lock, flags);
+ return status;
+}
+
+/* cqe for srq's rqe can potentially arrive out of order.
+ * index gives the entry in the shadow table where to store
+ * the wr_id. tag/index is returned in cqe to reference back
+ * for a given rqe.
+ */
+static int ocrdma_srq_get_idx(struct ocrdma_srq *srq)
+{
+ int row = 0;
+ int indx = 0;
+
+ for (row = 0; row < srq->bit_fields_len; row++) {
+ if (srq->idx_bit_fields[row]) {
+ indx = ffs(srq->idx_bit_fields[row]);
+ indx = (row * 32) + (indx - 1);
+ if (indx >= srq->rq.max_cnt)
+ BUG();
+ ocrdma_srq_toggle_bit(srq, indx);
+ break;
+ }
+ }
+
+ if (row == srq->bit_fields_len)
+ BUG();
+ return indx + 1; /* Use from index 1 */
+}
+
+static void ocrdma_ring_srq_db(struct ocrdma_srq *srq)
+{
+ u32 val = srq->rq.dbid | (1 << 16);
+
+ iowrite32(val, srq->db + OCRDMA_DB_GEN2_SRQ_OFFSET);
+}
+
+int ocrdma_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ int status = 0;
+ unsigned long flags;
+ struct ocrdma_srq *srq;
+ struct ocrdma_hdr_wqe *rqe;
+ u16 tag;
+
+ srq = get_ocrdma_srq(ibsrq);
+
+ spin_lock_irqsave(&srq->q_lock, flags);
+ while (wr) {
+ if (ocrdma_hwq_free_cnt(&srq->rq) == 0 ||
+ wr->num_sge > srq->rq.max_sges) {
+ status = -ENOMEM;
+ *bad_wr = wr;
+ break;
+ }
+ tag = ocrdma_srq_get_idx(srq);
+ rqe = ocrdma_hwq_head(&srq->rq);
+ ocrdma_build_rqe(rqe, wr, tag);
+
+ srq->rqe_wr_id_tbl[tag] = wr->wr_id;
+ /* make sure rqe is written before adapter can perform DMA */
+ wmb();
+ /* inform hw to start processing it */
+ ocrdma_ring_srq_db(srq);
+ /* update pointer, counter for next wr */
+ ocrdma_hwq_inc_head(&srq->rq);
+ wr = wr->next;
+ }
+ spin_unlock_irqrestore(&srq->q_lock, flags);
+ return status;
+}
+
+static enum ib_wc_status ocrdma_to_ibwc_err(u16 status)
+{
+ enum ib_wc_status ibwc_status;
+
+ switch (status) {
+ case OCRDMA_CQE_GENERAL_ERR:
+ ibwc_status = IB_WC_GENERAL_ERR;
+ break;
+ case OCRDMA_CQE_LOC_LEN_ERR:
+ ibwc_status = IB_WC_LOC_LEN_ERR;
+ break;
+ case OCRDMA_CQE_LOC_QP_OP_ERR:
+ ibwc_status = IB_WC_LOC_QP_OP_ERR;
+ break;
+ case OCRDMA_CQE_LOC_EEC_OP_ERR:
+ ibwc_status = IB_WC_LOC_EEC_OP_ERR;
+ break;
+ case OCRDMA_CQE_LOC_PROT_ERR:
+ ibwc_status = IB_WC_LOC_PROT_ERR;
+ break;
+ case OCRDMA_CQE_WR_FLUSH_ERR:
+ ibwc_status = IB_WC_WR_FLUSH_ERR;
+ break;
+ case OCRDMA_CQE_MW_BIND_ERR:
+ ibwc_status = IB_WC_MW_BIND_ERR;
+ break;
+ case OCRDMA_CQE_BAD_RESP_ERR:
+ ibwc_status = IB_WC_BAD_RESP_ERR;
+ break;
+ case OCRDMA_CQE_LOC_ACCESS_ERR:
+ ibwc_status = IB_WC_LOC_ACCESS_ERR;
+ break;
+ case OCRDMA_CQE_REM_INV_REQ_ERR:
+ ibwc_status = IB_WC_REM_INV_REQ_ERR;
+ break;
+ case OCRDMA_CQE_REM_ACCESS_ERR:
+ ibwc_status = IB_WC_REM_ACCESS_ERR;
+ break;
+ case OCRDMA_CQE_REM_OP_ERR:
+ ibwc_status = IB_WC_REM_OP_ERR;
+ break;
+ case OCRDMA_CQE_RETRY_EXC_ERR:
+ ibwc_status = IB_WC_RETRY_EXC_ERR;
+ break;
+ case OCRDMA_CQE_RNR_RETRY_EXC_ERR:
+ ibwc_status = IB_WC_RNR_RETRY_EXC_ERR;
+ break;
+ case OCRDMA_CQE_LOC_RDD_VIOL_ERR:
+ ibwc_status = IB_WC_LOC_RDD_VIOL_ERR;
+ break;
+ case OCRDMA_CQE_REM_INV_RD_REQ_ERR:
+ ibwc_status = IB_WC_REM_INV_RD_REQ_ERR;
+ break;
+ case OCRDMA_CQE_REM_ABORT_ERR:
+ ibwc_status = IB_WC_REM_ABORT_ERR;
+ break;
+ case OCRDMA_CQE_INV_EECN_ERR:
+ ibwc_status = IB_WC_INV_EECN_ERR;
+ break;
+ case OCRDMA_CQE_INV_EEC_STATE_ERR:
+ ibwc_status = IB_WC_INV_EEC_STATE_ERR;
+ break;
+ case OCRDMA_CQE_FATAL_ERR:
+ ibwc_status = IB_WC_FATAL_ERR;
+ break;
+ case OCRDMA_CQE_RESP_TIMEOUT_ERR:
+ ibwc_status = IB_WC_RESP_TIMEOUT_ERR;
+ break;
+ default:
+ ibwc_status = IB_WC_GENERAL_ERR;
+ break;
+ }
+ return ibwc_status;
+}
+
+static void ocrdma_update_wc(struct ocrdma_qp *qp, struct ib_wc *ibwc,
+ u32 wqe_idx)
+{
+ struct ocrdma_hdr_wqe *hdr;
+ struct ocrdma_sge *rw;
+ int opcode;
+
+ hdr = ocrdma_hwq_head_from_idx(&qp->sq, wqe_idx);
+
+ ibwc->wr_id = qp->wqe_wr_id_tbl[wqe_idx].wrid;
+ /* Undo the hdr->cw swap */
+ opcode = le32_to_cpu(hdr->cw) & OCRDMA_WQE_OPCODE_MASK;
+ switch (opcode) {
+ case OCRDMA_WRITE:
+ ibwc->opcode = IB_WC_RDMA_WRITE;
+ break;
+ case OCRDMA_READ:
+ rw = (struct ocrdma_sge *)(hdr + 1);
+ ibwc->opcode = IB_WC_RDMA_READ;
+ ibwc->byte_len = rw->len;
+ break;
+ case OCRDMA_SEND:
+ ibwc->opcode = IB_WC_SEND;
+ break;
+ case OCRDMA_FR_MR:
+ ibwc->opcode = IB_WC_FAST_REG_MR;
+ break;
+ case OCRDMA_LKEY_INV:
+ ibwc->opcode = IB_WC_LOCAL_INV;
+ break;
+ default:
+ ibwc->status = IB_WC_GENERAL_ERR;
+ pr_err("%s() invalid opcode received = 0x%x\n",
+ __func__, hdr->cw & OCRDMA_WQE_OPCODE_MASK);
+ break;
+ }
+}
+
+static void ocrdma_set_cqe_status_flushed(struct ocrdma_qp *qp,
+ struct ocrdma_cqe *cqe)
+{
+ if (is_cqe_for_sq(cqe)) {
+ cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
+ cqe->flags_status_srcqpn) &
+ ~OCRDMA_CQE_STATUS_MASK);
+ cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
+ cqe->flags_status_srcqpn) |
+ (OCRDMA_CQE_WR_FLUSH_ERR <<
+ OCRDMA_CQE_STATUS_SHIFT));
+ } else {
+ if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) {
+ cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
+ cqe->flags_status_srcqpn) &
+ ~OCRDMA_CQE_UD_STATUS_MASK);
+ cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
+ cqe->flags_status_srcqpn) |
+ (OCRDMA_CQE_WR_FLUSH_ERR <<
+ OCRDMA_CQE_UD_STATUS_SHIFT));
+ } else {
+ cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
+ cqe->flags_status_srcqpn) &
+ ~OCRDMA_CQE_STATUS_MASK);
+ cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
+ cqe->flags_status_srcqpn) |
+ (OCRDMA_CQE_WR_FLUSH_ERR <<
+ OCRDMA_CQE_STATUS_SHIFT));
+ }
+ }
+}
+
+static bool ocrdma_update_err_cqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
+ struct ocrdma_qp *qp, int status)
+{
+ bool expand = false;
+
+ ibwc->byte_len = 0;
+ ibwc->qp = &qp->ibqp;
+ ibwc->status = ocrdma_to_ibwc_err(status);
+
+ ocrdma_flush_qp(qp);
+ ocrdma_qp_state_change(qp, IB_QPS_ERR, NULL);
+
+ /* if wqe/rqe pending for which cqe needs to be returned,
+ * trigger inflating it.
+ */
+ if (!is_hw_rq_empty(qp) || !is_hw_sq_empty(qp)) {
+ expand = true;
+ ocrdma_set_cqe_status_flushed(qp, cqe);
+ }
+ return expand;
+}
+
+static int ocrdma_update_err_rcqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
+ struct ocrdma_qp *qp, int status)
+{
+ ibwc->opcode = IB_WC_RECV;
+ ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
+ ocrdma_hwq_inc_tail(&qp->rq);
+
+ return ocrdma_update_err_cqe(ibwc, cqe, qp, status);
+}
+
+static int ocrdma_update_err_scqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
+ struct ocrdma_qp *qp, int status)
+{
+ ocrdma_update_wc(qp, ibwc, qp->sq.tail);
+ ocrdma_hwq_inc_tail(&qp->sq);
+
+ return ocrdma_update_err_cqe(ibwc, cqe, qp, status);
+}
+
+
+static bool ocrdma_poll_err_scqe(struct ocrdma_qp *qp,
+ struct ocrdma_cqe *cqe, struct ib_wc *ibwc,
+ bool *polled, bool *stop)
+{
+ bool expand;
+ struct ocrdma_dev *dev = get_ocrdma_dev(qp->ibqp.device);
+ int status = (le32_to_cpu(cqe->flags_status_srcqpn) &
+ OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
+ if (status < OCRDMA_MAX_CQE_ERR)
+ atomic_inc(&dev->cqe_err_stats[status]);
+
+ /* when hw sq is empty, but rq is not empty, so we continue
+ * to keep the cqe in order to get the cq event again.
+ */
+ if (is_hw_sq_empty(qp) && !is_hw_rq_empty(qp)) {
+ /* when cq for rq and sq is same, it is safe to return
+ * flush cqe for RQEs.
+ */
+ if (!qp->srq && (qp->sq_cq == qp->rq_cq)) {
+ *polled = true;
+ status = OCRDMA_CQE_WR_FLUSH_ERR;
+ expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status);
+ } else {
+ /* stop processing further cqe as this cqe is used for
+ * triggering cq event on buddy cq of RQ.
+ * When QP is destroyed, this cqe will be removed
+ * from the cq's hardware q.
+ */
+ *polled = false;
+ *stop = true;
+ expand = false;
+ }
+ } else if (is_hw_sq_empty(qp)) {
+ /* Do nothing */
+ expand = false;
+ *polled = false;
+ *stop = false;
+ } else {
+ *polled = true;
+ expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status);
+ }
+ return expand;
+}
+
+static bool ocrdma_poll_success_scqe(struct ocrdma_qp *qp,
+ struct ocrdma_cqe *cqe,
+ struct ib_wc *ibwc, bool *polled)
+{
+ bool expand = false;
+ int tail = qp->sq.tail;
+ u32 wqe_idx;
+
+ if (!qp->wqe_wr_id_tbl[tail].signaled) {
+ *polled = false; /* WC cannot be consumed yet */
+ } else {
+ ibwc->status = IB_WC_SUCCESS;
+ ibwc->wc_flags = 0;
+ ibwc->qp = &qp->ibqp;
+ ocrdma_update_wc(qp, ibwc, tail);
+ *polled = true;
+ }
+ wqe_idx = (le32_to_cpu(cqe->wq.wqeidx) &
+ OCRDMA_CQE_WQEIDX_MASK) & qp->sq.max_wqe_idx;
+ if (tail != wqe_idx)
+ expand = true; /* Coalesced CQE can't be consumed yet */
+
+ ocrdma_hwq_inc_tail(&qp->sq);
+ return expand;
+}
+
+static bool ocrdma_poll_scqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
+ struct ib_wc *ibwc, bool *polled, bool *stop)
+{
+ int status;
+ bool expand;
+
+ status = (le32_to_cpu(cqe->flags_status_srcqpn) &
+ OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
+
+ if (status == OCRDMA_CQE_SUCCESS)
+ expand = ocrdma_poll_success_scqe(qp, cqe, ibwc, polled);
+ else
+ expand = ocrdma_poll_err_scqe(qp, cqe, ibwc, polled, stop);
+ return expand;
+}
+
+static int ocrdma_update_ud_rcqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe)
+{
+ int status;
+
+ status = (le32_to_cpu(cqe->flags_status_srcqpn) &
+ OCRDMA_CQE_UD_STATUS_MASK) >> OCRDMA_CQE_UD_STATUS_SHIFT;
+ ibwc->src_qp = le32_to_cpu(cqe->flags_status_srcqpn) &
+ OCRDMA_CQE_SRCQP_MASK;
+ ibwc->pkey_index = le32_to_cpu(cqe->ud.rxlen_pkey) &
+ OCRDMA_CQE_PKEY_MASK;
+ ibwc->wc_flags = IB_WC_GRH;
+ ibwc->byte_len = (le32_to_cpu(cqe->ud.rxlen_pkey) >>
+ OCRDMA_CQE_UD_XFER_LEN_SHIFT);
+ return status;
+}
+
+static void ocrdma_update_free_srq_cqe(struct ib_wc *ibwc,
+ struct ocrdma_cqe *cqe,
+ struct ocrdma_qp *qp)
+{
+ unsigned long flags;
+ struct ocrdma_srq *srq;
+ u32 wqe_idx;
+
+ srq = get_ocrdma_srq(qp->ibqp.srq);
+ wqe_idx = (le32_to_cpu(cqe->rq.buftag_qpn) >>
+ OCRDMA_CQE_BUFTAG_SHIFT) & srq->rq.max_wqe_idx;
+ if (wqe_idx < 1)
+ BUG();
+
+ ibwc->wr_id = srq->rqe_wr_id_tbl[wqe_idx];
+ spin_lock_irqsave(&srq->q_lock, flags);
+ ocrdma_srq_toggle_bit(srq, wqe_idx - 1);
+ spin_unlock_irqrestore(&srq->q_lock, flags);
+ ocrdma_hwq_inc_tail(&srq->rq);
+}
+
+static bool ocrdma_poll_err_rcqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
+ struct ib_wc *ibwc, bool *polled, bool *stop,
+ int status)
+{
+ bool expand;
+ struct ocrdma_dev *dev = get_ocrdma_dev(qp->ibqp.device);
+
+ if (status < OCRDMA_MAX_CQE_ERR)
+ atomic_inc(&dev->cqe_err_stats[status]);
+
+ /* when hw_rq is empty, but wq is not empty, so continue
+ * to keep the cqe to get the cq event again.
+ */
+ if (is_hw_rq_empty(qp) && !is_hw_sq_empty(qp)) {
+ if (!qp->srq && (qp->sq_cq == qp->rq_cq)) {
+ *polled = true;
+ status = OCRDMA_CQE_WR_FLUSH_ERR;
+ expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status);
+ } else {
+ *polled = false;
+ *stop = true;
+ expand = false;
+ }
+ } else if (is_hw_rq_empty(qp)) {
+ /* Do nothing */
+ expand = false;
+ *polled = false;
+ *stop = false;
+ } else {
+ *polled = true;
+ expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status);
+ }
+ return expand;
+}
+
+static void ocrdma_poll_success_rcqe(struct ocrdma_qp *qp,
+ struct ocrdma_cqe *cqe, struct ib_wc *ibwc)
+{
+ ibwc->opcode = IB_WC_RECV;
+ ibwc->qp = &qp->ibqp;
+ ibwc->status = IB_WC_SUCCESS;
+
+ if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI)
+ ocrdma_update_ud_rcqe(ibwc, cqe);
+ else
+ ibwc->byte_len = le32_to_cpu(cqe->rq.rxlen);
+
+ if (is_cqe_imm(cqe)) {
+ ibwc->ex.imm_data = htonl(le32_to_cpu(cqe->rq.lkey_immdt));
+ ibwc->wc_flags |= IB_WC_WITH_IMM;
+ } else if (is_cqe_wr_imm(cqe)) {
+ ibwc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
+ ibwc->ex.imm_data = htonl(le32_to_cpu(cqe->rq.lkey_immdt));
+ ibwc->wc_flags |= IB_WC_WITH_IMM;
+ } else if (is_cqe_invalidated(cqe)) {
+ ibwc->ex.invalidate_rkey = le32_to_cpu(cqe->rq.lkey_immdt);
+ ibwc->wc_flags |= IB_WC_WITH_INVALIDATE;
+ }
+ if (qp->ibqp.srq) {
+ ocrdma_update_free_srq_cqe(ibwc, cqe, qp);
+ } else {
+ ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
+ ocrdma_hwq_inc_tail(&qp->rq);
+ }
+}
+
+static bool ocrdma_poll_rcqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
+ struct ib_wc *ibwc, bool *polled, bool *stop)
+{
+ int status;
+ bool expand = false;
+
+ ibwc->wc_flags = 0;
+ if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) {
+ status = (le32_to_cpu(cqe->flags_status_srcqpn) &
+ OCRDMA_CQE_UD_STATUS_MASK) >>
+ OCRDMA_CQE_UD_STATUS_SHIFT;
+ } else {
+ status = (le32_to_cpu(cqe->flags_status_srcqpn) &
+ OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
+ }
+
+ if (status == OCRDMA_CQE_SUCCESS) {
+ *polled = true;
+ ocrdma_poll_success_rcqe(qp, cqe, ibwc);
+ } else {
+ expand = ocrdma_poll_err_rcqe(qp, cqe, ibwc, polled, stop,
+ status);
+ }
+ return expand;
+}
+
+static void ocrdma_change_cq_phase(struct ocrdma_cq *cq, struct ocrdma_cqe *cqe,
+ u16 cur_getp)
+{
+ if (cq->phase_change) {
+ if (cur_getp == 0)
+ cq->phase = (~cq->phase & OCRDMA_CQE_VALID);
+ } else {
+ /* clear valid bit */
+ cqe->flags_status_srcqpn = 0;
+ }
+}
+
+static int ocrdma_poll_hwcq(struct ocrdma_cq *cq, int num_entries,
+ struct ib_wc *ibwc)
+{
+ u16 qpn = 0;
+ int i = 0;
+ bool expand = false;
+ int polled_hw_cqes = 0;
+ struct ocrdma_qp *qp = NULL;
+ struct ocrdma_dev *dev = get_ocrdma_dev(cq->ibcq.device);
+ struct ocrdma_cqe *cqe;
+ u16 cur_getp; bool polled = false; bool stop = false;
+
+ cur_getp = cq->getp;
+ while (num_entries) {
+ cqe = cq->va + cur_getp;
+ /* check whether valid cqe or not */
+ if (!is_cqe_valid(cq, cqe))
+ break;
+ qpn = (le32_to_cpu(cqe->cmn.qpn) & OCRDMA_CQE_QPN_MASK);
+ /* ignore discarded cqe */
+ if (qpn == 0)
+ goto skip_cqe;
+ qp = dev->qp_tbl[qpn];
+ BUG_ON(qp == NULL);
+
+ if (is_cqe_for_sq(cqe)) {
+ expand = ocrdma_poll_scqe(qp, cqe, ibwc, &polled,
+ &stop);
+ } else {
+ expand = ocrdma_poll_rcqe(qp, cqe, ibwc, &polled,
+ &stop);
+ }
+ if (expand)
+ goto expand_cqe;
+ if (stop)
+ goto stop_cqe;
+ /* clear qpn to avoid duplicate processing by discard_cqe() */
+ cqe->cmn.qpn = 0;
+skip_cqe:
+ polled_hw_cqes += 1;
+ cur_getp = (cur_getp + 1) % cq->max_hw_cqe;
+ ocrdma_change_cq_phase(cq, cqe, cur_getp);
+expand_cqe:
+ if (polled) {
+ num_entries -= 1;
+ i += 1;
+ ibwc = ibwc + 1;
+ polled = false;
+ }
+ }
+stop_cqe:
+ cq->getp = cur_getp;
+ if (cq->deferred_arm) {
+ ocrdma_ring_cq_db(dev, cq->id, true, cq->deferred_sol,
+ polled_hw_cqes);
+ cq->deferred_arm = false;
+ cq->deferred_sol = false;
+ } else {
+ /* We need to pop the CQE. No need to arm */
+ ocrdma_ring_cq_db(dev, cq->id, false, cq->deferred_sol,
+ polled_hw_cqes);
+ cq->deferred_sol = false;
+ }
+
+ return i;
+}
+
+/* insert error cqe if the QP's SQ or RQ's CQ matches the CQ under poll. */
+static int ocrdma_add_err_cqe(struct ocrdma_cq *cq, int num_entries,
+ struct ocrdma_qp *qp, struct ib_wc *ibwc)
+{
+ int err_cqes = 0;
+
+ while (num_entries) {
+ if (is_hw_sq_empty(qp) && is_hw_rq_empty(qp))
+ break;
+ if (!is_hw_sq_empty(qp) && qp->sq_cq == cq) {
+ ocrdma_update_wc(qp, ibwc, qp->sq.tail);
+ ocrdma_hwq_inc_tail(&qp->sq);
+ } else if (!is_hw_rq_empty(qp) && qp->rq_cq == cq) {
+ ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
+ ocrdma_hwq_inc_tail(&qp->rq);
+ } else {
+ return err_cqes;
+ }
+ ibwc->byte_len = 0;
+ ibwc->status = IB_WC_WR_FLUSH_ERR;
+ ibwc = ibwc + 1;
+ err_cqes += 1;
+ num_entries -= 1;
+ }
+ return err_cqes;
+}
+
+int ocrdma_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
+{
+ int cqes_to_poll = num_entries;
+ struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device);
+ int num_os_cqe = 0, err_cqes = 0;
+ struct ocrdma_qp *qp;
+ unsigned long flags;
+
+ /* poll cqes from adapter CQ */
+ spin_lock_irqsave(&cq->cq_lock, flags);
+ num_os_cqe = ocrdma_poll_hwcq(cq, cqes_to_poll, wc);
+ spin_unlock_irqrestore(&cq->cq_lock, flags);
+ cqes_to_poll -= num_os_cqe;
+
+ if (cqes_to_poll) {
+ wc = wc + num_os_cqe;
+ /* adapter returns single error cqe when qp moves to
+ * error state. So insert error cqes with wc_status as
+ * FLUSHED for pending WQEs and RQEs of QP's SQ and RQ
+ * respectively which uses this CQ.
+ */
+ spin_lock_irqsave(&dev->flush_q_lock, flags);
+ list_for_each_entry(qp, &cq->sq_head, sq_entry) {
+ if (cqes_to_poll == 0)
+ break;
+ err_cqes = ocrdma_add_err_cqe(cq, cqes_to_poll, qp, wc);
+ cqes_to_poll -= err_cqes;
+ num_os_cqe += err_cqes;
+ wc = wc + err_cqes;
+ }
+ spin_unlock_irqrestore(&dev->flush_q_lock, flags);
+ }
+ return num_os_cqe;
+}
+
+int ocrdma_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags cq_flags)
+{
+ struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device);
+ u16 cq_id;
+ unsigned long flags;
+ bool arm_needed = false, sol_needed = false;
+
+ cq_id = cq->id;
+
+ spin_lock_irqsave(&cq->cq_lock, flags);
+ if (cq_flags & IB_CQ_NEXT_COMP || cq_flags & IB_CQ_SOLICITED)
+ arm_needed = true;
+ if (cq_flags & IB_CQ_SOLICITED)
+ sol_needed = true;
+
+ if (cq->first_arm) {
+ ocrdma_ring_cq_db(dev, cq_id, arm_needed, sol_needed, 0);
+ cq->first_arm = false;
+ }
+
+ cq->deferred_arm = true;
+ cq->deferred_sol = sol_needed;
+ spin_unlock_irqrestore(&cq->cq_lock, flags);
+
+ return 0;
+}
+
+struct ib_mr *ocrdma_alloc_frmr(struct ib_pd *ibpd, int max_page_list_len)
+{
+ int status;
+ struct ocrdma_mr *mr;
+ struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
+
+ if (max_page_list_len > dev->attr.max_pages_per_frmr)
+ return ERR_PTR(-EINVAL);
+
+ mr = kzalloc(sizeof(*mr), GFP_KERNEL);
+ if (!mr)
+ return ERR_PTR(-ENOMEM);
+
+ status = ocrdma_get_pbl_info(dev, mr, max_page_list_len);
+ if (status)
+ goto pbl_err;
+ mr->hwmr.fr_mr = 1;
+ mr->hwmr.remote_rd = 0;
+ mr->hwmr.remote_wr = 0;
+ mr->hwmr.local_rd = 0;
+ mr->hwmr.local_wr = 0;
+ mr->hwmr.mw_bind = 0;
+ status = ocrdma_build_pbl_tbl(dev, &mr->hwmr);
+ if (status)
+ goto pbl_err;
+ status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, 0);
+ if (status)
+ goto mbx_err;
+ mr->ibmr.rkey = mr->hwmr.lkey;
+ mr->ibmr.lkey = mr->hwmr.lkey;
+ dev->stag_arr[(mr->hwmr.lkey >> 8) & (OCRDMA_MAX_STAG - 1)] =
+ (unsigned long) mr;
+ return &mr->ibmr;
+mbx_err:
+ ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
+pbl_err:
+ kfree(mr);
+ return ERR_PTR(-ENOMEM);
+}
+
+struct ib_fast_reg_page_list *ocrdma_alloc_frmr_page_list(struct ib_device
+ *ibdev,
+ int page_list_len)
+{
+ struct ib_fast_reg_page_list *frmr_list;
+ int size;
+
+ size = sizeof(*frmr_list) + (page_list_len * sizeof(u64));
+ frmr_list = kzalloc(size, GFP_KERNEL);
+ if (!frmr_list)
+ return ERR_PTR(-ENOMEM);
+ frmr_list->page_list = (u64 *)(frmr_list + 1);
+ return frmr_list;
+}
+
+void ocrdma_free_frmr_page_list(struct ib_fast_reg_page_list *page_list)
+{
+ kfree(page_list);
+}
+
+#define MAX_KERNEL_PBE_SIZE 65536
+static inline int count_kernel_pbes(struct ib_phys_buf *buf_list,
+ int buf_cnt, u32 *pbe_size)
+{
+ u64 total_size = 0;
+ u64 buf_size = 0;
+ int i;
+ *pbe_size = roundup(buf_list[0].size, PAGE_SIZE);
+ *pbe_size = roundup_pow_of_two(*pbe_size);
+
+ /* find the smallest PBE size that we can have */
+ for (i = 0; i < buf_cnt; i++) {
+ /* first addr may not be page aligned, so ignore checking */
+ if ((i != 0) && ((buf_list[i].addr & ~PAGE_MASK) ||
+ (buf_list[i].size & ~PAGE_MASK))) {
+ return 0;
+ }
+
+ /* if configured PBE size is greater then the chosen one,
+ * reduce the PBE size.
+ */
+ buf_size = roundup(buf_list[i].size, PAGE_SIZE);
+ /* pbe_size has to be even multiple of 4K 1,2,4,8...*/
+ buf_size = roundup_pow_of_two(buf_size);
+ if (*pbe_size > buf_size)
+ *pbe_size = buf_size;
+
+ total_size += buf_size;
+ }
+ *pbe_size = *pbe_size > MAX_KERNEL_PBE_SIZE ?
+ (MAX_KERNEL_PBE_SIZE) : (*pbe_size);
+
+ /* num_pbes = total_size / (*pbe_size); this is implemented below. */
+
+ return total_size >> ilog2(*pbe_size);
+}
+
+static void build_kernel_pbes(struct ib_phys_buf *buf_list, int ib_buf_cnt,
+ u32 pbe_size, struct ocrdma_pbl *pbl_tbl,
+ struct ocrdma_hw_mr *hwmr)
+{
+ int i;
+ int idx;
+ int pbes_per_buf = 0;
+ u64 buf_addr = 0;
+ int num_pbes;
+ struct ocrdma_pbe *pbe;
+ int total_num_pbes = 0;
+
+ if (!hwmr->num_pbes)
+ return;
+
+ pbe = (struct ocrdma_pbe *)pbl_tbl->va;
+ num_pbes = 0;
+
+ /* go through the OS phy regions & fill hw pbe entries into pbls. */
+ for (i = 0; i < ib_buf_cnt; i++) {
+ buf_addr = buf_list[i].addr;
+ pbes_per_buf =
+ roundup_pow_of_two(roundup(buf_list[i].size, PAGE_SIZE)) /
+ pbe_size;
+ hwmr->len += buf_list[i].size;
+ /* number of pbes can be more for one OS buf, when
+ * buffers are of different sizes.
+ * split the ib_buf to one or more pbes.
+ */
+ for (idx = 0; idx < pbes_per_buf; idx++) {
+ /* we program always page aligned addresses,
+ * first unaligned address is taken care by fbo.
+ */
+ if (i == 0) {
+ /* for non zero fbo, assign the
+ * start of the page.
+ */
+ pbe->pa_lo =
+ cpu_to_le32((u32) (buf_addr & PAGE_MASK));
+ pbe->pa_hi =
+ cpu_to_le32((u32) upper_32_bits(buf_addr));
+ } else {
+ pbe->pa_lo =
+ cpu_to_le32((u32) (buf_addr & 0xffffffff));
+ pbe->pa_hi =
+ cpu_to_le32((u32) upper_32_bits(buf_addr));
+ }
+ buf_addr += pbe_size;
+ num_pbes += 1;
+ total_num_pbes += 1;
+ pbe++;
+
+ if (total_num_pbes == hwmr->num_pbes)
+ goto mr_tbl_done;
+ /* if the pbl is full storing the pbes,
+ * move to next pbl.
+ */
+ if (num_pbes == (hwmr->pbl_size/sizeof(u64))) {
+ pbl_tbl++;
+ pbe = (struct ocrdma_pbe *)pbl_tbl->va;
+ num_pbes = 0;
+ }
+ }
+ }
+mr_tbl_done:
+ return;
+}
+
+struct ib_mr *ocrdma_reg_kernel_mr(struct ib_pd *ibpd,
+ struct ib_phys_buf *buf_list,
+ int buf_cnt, int acc, u64 *iova_start)
+{
+ int status = -ENOMEM;
+ struct ocrdma_mr *mr;
+ struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
+ struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
+ u32 num_pbes;
+ u32 pbe_size = 0;
+
+ if ((acc & IB_ACCESS_REMOTE_WRITE) && !(acc & IB_ACCESS_LOCAL_WRITE))
+ return ERR_PTR(-EINVAL);
+
+ mr = kzalloc(sizeof(*mr), GFP_KERNEL);
+ if (!mr)
+ return ERR_PTR(status);
+
+ num_pbes = count_kernel_pbes(buf_list, buf_cnt, &pbe_size);
+ if (num_pbes == 0) {
+ status = -EINVAL;
+ goto pbl_err;
+ }
+ status = ocrdma_get_pbl_info(dev, mr, num_pbes);
+ if (status)
+ goto pbl_err;
+
+ mr->hwmr.pbe_size = pbe_size;
+ mr->hwmr.fbo = *iova_start - (buf_list[0].addr & PAGE_MASK);
+ mr->hwmr.va = *iova_start;
+ mr->hwmr.local_rd = 1;
+ mr->hwmr.remote_wr = (acc & IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
+ mr->hwmr.remote_rd = (acc & IB_ACCESS_REMOTE_READ) ? 1 : 0;
+ mr->hwmr.local_wr = (acc & IB_ACCESS_LOCAL_WRITE) ? 1 : 0;
+ mr->hwmr.remote_atomic = (acc & IB_ACCESS_REMOTE_ATOMIC) ? 1 : 0;
+ mr->hwmr.mw_bind = (acc & IB_ACCESS_MW_BIND) ? 1 : 0;
+
+ status = ocrdma_build_pbl_tbl(dev, &mr->hwmr);
+ if (status)
+ goto pbl_err;
+ build_kernel_pbes(buf_list, buf_cnt, pbe_size, mr->hwmr.pbl_table,
+ &mr->hwmr);
+ status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, acc);
+ if (status)
+ goto mbx_err;
+
+ mr->ibmr.lkey = mr->hwmr.lkey;
+ if (mr->hwmr.remote_wr || mr->hwmr.remote_rd)
+ mr->ibmr.rkey = mr->hwmr.lkey;
+ return &mr->ibmr;
+
+mbx_err:
+ ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
+pbl_err:
+ kfree(mr);
+ return ERR_PTR(status);
+}
Code Review / kvmfornfv.git / blobdiff