| /******************************************************************* |
| * 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 = ~0ull; |
| 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 = 0; |
| attr->max_qp = dev->attr.max_qp; |
| attr->max_ah = dev->attr.max_qp; |
| 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; |
| attr->max_sge = dev->attr.max_send_sge; |
| attr->max_sge_rd = dev->attr.max_send_sge; |
| attr->max_cq = dev->attr.max_cq; |
| attr->max_cqe = dev->attr.max_cqe; |
| attr->max_mr = dev->attr.max_mr; |
| attr->max_mw = 0; |
| 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_qp - 1); |
| attr->max_srq_sge = attr->max_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 = 0; |
| attr->max_pkeys = 1; |
| return 0; |
| } |
| |
| 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) { |
| ocrdma_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; |
| props->gid_tbl_len = OCRDMA_MAX_SGID; |
| props->pkey_tbl_len = 1; |
| props->bad_pkey_cntr = 0; |
| props->qkey_viol_cntr = 0; |
| props->active_width = IB_WIDTH_1X; |
| props->active_speed = 4; |
| 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) { |
| ocrdma_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; |
| } |
| |
| 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); |
| ctx->dev = dev; |
| 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; |
| |
| resp.ah_tbl_len = ctx->ah_tbl.len; |
| resp.ah_tbl_page = ctx->ah_tbl.pa; |
| |
| status = ocrdma_add_mmap(ctx, resp.ah_tbl_page, resp.ah_tbl_len); |
| if (status) |
| goto map_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; |
| resp.rsvd = 0; |
| |
| 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: |
| 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) |
| { |
| struct ocrdma_mm *mm, *tmp; |
| struct ocrdma_ucontext *uctx = get_ocrdma_ucontext(ibctx); |
| struct pci_dev *pdev = uctx->dev->nic_info.pdev; |
| |
| 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 0; |
| } |
| |
| int ocrdma_mmap(struct ib_ucontext *context, struct vm_area_struct *vma) |
| { |
| struct ocrdma_ucontext *ucontext = get_ocrdma_ucontext(context); |
| struct ocrdma_dev *dev = ucontext->dev; |
| 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)) { |
| /* doorbell mapping */ |
| 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)) { |
| /* dpp area mapping */ |
| 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 { |
| /* queue memory mapping */ |
| 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_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); |
| |
| rsp.id = pd->id; |
| rsp.dpp_enabled = pd->dpp_enabled; |
| db_page_addr = pd->dev->nic_info.unmapped_db + |
| (pd->id * pd->dev->nic_info.db_page_size); |
| db_page_size = pd->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 = pd->dev->nic_info.dpp_unmapped_addr + |
| (pd->id * OCRDMA_DPP_PAGE_SIZE); |
| status = ocrdma_add_mmap(uctx, dpp_page_addr, |
| OCRDMA_DPP_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, OCRDMA_DPP_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; |
| int status; |
| |
| pd = kzalloc(sizeof(*pd), GFP_KERNEL); |
| if (!pd) |
| return ERR_PTR(-ENOMEM); |
| pd->dev = dev; |
| if (udata && context) { |
| pd->dpp_enabled = (dev->nic_info.dev_family == |
| OCRDMA_GEN2_FAMILY) ? true : false; |
| pd->num_dpp_qp = |
| pd->dpp_enabled ? OCRDMA_PD_MAX_DPP_ENABLED_QP : 0; |
| } |
| status = ocrdma_mbx_alloc_pd(dev, pd); |
| if (status) { |
| kfree(pd); |
| return ERR_PTR(status); |
| } |
| atomic_set(&pd->use_cnt, 0); |
| |
| if (udata && context) { |
| status = ocrdma_copy_pd_uresp(pd, context, udata); |
| if (status) |
| goto err; |
| } |
| return &pd->ibpd; |
| |
| err: |
| ocrdma_dealloc_pd(&pd->ibpd); |
| return ERR_PTR(status); |
| } |
| |
| int ocrdma_dealloc_pd(struct ib_pd *ibpd) |
| { |
| struct ocrdma_pd *pd = get_ocrdma_pd(ibpd); |
| struct ocrdma_dev *dev = pd->dev; |
| int status; |
| u64 usr_db; |
| |
| if (atomic_read(&pd->use_cnt)) { |
| ocrdma_err("%s(%d) pd=0x%x is in use.\n", |
| __func__, dev->id, pd->id); |
| status = -EFAULT; |
| goto dealloc_err; |
| } |
| status = ocrdma_mbx_dealloc_pd(dev, pd); |
| if (pd->uctx) { |
| u64 dpp_db = dev->nic_info.dpp_unmapped_addr + |
| (pd->id * OCRDMA_DPP_PAGE_SIZE); |
| if (pd->dpp_enabled) |
| ocrdma_del_mmap(pd->uctx, dpp_db, OCRDMA_DPP_PAGE_SIZE); |
| usr_db = dev->nic_info.unmapped_db + |
| (pd->id * dev->nic_info.db_page_size); |
| ocrdma_del_mmap(pd->uctx, usr_db, dev->nic_info.db_page_size); |
| } |
| kfree(pd); |
| dealloc_err: |
| return status; |
| } |
| |
| static struct ocrdma_mr *ocrdma_alloc_lkey(struct ib_pd *ibpd, |
| int acc, u32 num_pbls, |
| u32 addr_check) |
| { |
| int status; |
| struct ocrdma_mr *mr; |
| struct ocrdma_pd *pd = get_ocrdma_pd(ibpd); |
| struct ocrdma_dev *dev = pd->dev; |
| |
| if (acc & IB_ACCESS_REMOTE_WRITE && !(acc & IB_ACCESS_LOCAL_WRITE)) { |
| ocrdma_err("%s(%d) leaving err, invalid access rights\n", |
| __func__, dev->id); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| mr = kzalloc(sizeof(*mr), GFP_KERNEL); |
| if (!mr) |
| return ERR_PTR(-ENOMEM); |
| mr->hwmr.dev = dev; |
| 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, pd->id, addr_check); |
| if (status) { |
| kfree(mr); |
| return ERR_PTR(-ENOMEM); |
| } |
| mr->pd = pd; |
| atomic_inc(&pd->use_cnt); |
| mr->ibmr.lkey = mr->hwmr.lkey; |
| if (mr->hwmr.remote_wr || mr->hwmr.remote_rd) |
| mr->ibmr.rkey = mr->hwmr.lkey; |
| return mr; |
| } |
| |
| struct ib_mr *ocrdma_get_dma_mr(struct ib_pd *ibpd, int acc) |
| { |
| struct ocrdma_mr *mr; |
| |
| mr = ocrdma_alloc_lkey(ibpd, acc, 0, OCRDMA_ADDR_CHECK_DISABLE); |
| if (IS_ERR(mr)) |
| return ERR_CAST(mr); |
| |
| 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_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 >= mr->hwmr.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 ib_umem_chunk *chunk; |
| struct ocrdma_pbl *pbl_tbl = mr->hwmr.pbl_table; |
| struct ib_umem *umem = mr->umem; |
| int i, shift, pg_cnt, pages, pbe_cnt, 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); |
| |
| list_for_each_entry(chunk, &umem->chunk_list, list) { |
| /* get all the dma regions from the chunk. */ |
| for (i = 0; i < chunk->nmap; i++) { |
| pages = sg_dma_len(&chunk->page_list[i]) >> 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 |
| (&chunk->page_list[i]) + |
| (umem->page_size * pg_cnt)); |
| pbe->pa_hi = |
| cpu_to_le32(upper_32_bits |
| ((sg_dma_address |
| (&chunk->page_list[i]) + |
| 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; |
| struct ocrdma_mr *mr; |
| struct ocrdma_pd *pd; |
| u32 num_pbes; |
| |
| pd = get_ocrdma_pd(ibpd); |
| dev = pd->dev; |
| |
| 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->hwmr.dev = dev; |
| 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(mr, num_pbes); |
| if (status) |
| goto umem_err; |
| |
| mr->hwmr.pbe_size = mr->umem->page_size; |
| mr->hwmr.fbo = mr->umem->offset; |
| 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->pd = pd; |
| atomic_inc(&pd->use_cnt); |
| 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 = mr->hwmr.dev; |
| int status; |
| |
| status = ocrdma_mbx_dealloc_lkey(dev, mr->hwmr.fr_mr, mr->hwmr.lkey); |
| |
| if (mr->hwmr.fr_mr == 0) |
| ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr); |
| |
| atomic_dec(&mr->pd->use_cnt); |
| /* it could be user registered memory. */ |
| if (mr->umem) |
| ib_umem_release(mr->umem); |
| kfree(mr); |
| return status; |
| } |
| |
| static int ocrdma_copy_cq_uresp(struct ocrdma_cq *cq, struct ib_udata *udata, |
| struct ib_ucontext *ib_ctx) |
| { |
| int status; |
| struct ocrdma_ucontext *uctx; |
| struct ocrdma_create_cq_uresp uresp; |
| |
| uresp.cq_id = cq->id; |
| uresp.page_size = cq->len; |
| uresp.num_pages = 1; |
| uresp.max_hw_cqe = cq->max_hw_cqe; |
| uresp.page_addr[0] = cq->pa; |
| uresp.db_page_addr = cq->dev->nic_info.unmapped_db; |
| uresp.db_page_size = cq->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) { |
| ocrdma_err("%s(%d) copy error cqid=0x%x.\n", |
| __func__, cq->dev->id, cq->id); |
| goto err; |
| } |
| uctx = get_ocrdma_ucontext(ib_ctx); |
| 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); |
| 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); |
| atomic_set(&cq->use_cnt, 0); |
| INIT_LIST_HEAD(&cq->sq_head); |
| INIT_LIST_HEAD(&cq->rq_head); |
| cq->dev = dev; |
| |
| status = ocrdma_mbx_create_cq(dev, cq, entries, ureq.dpp_cq); |
| if (status) { |
| kfree(cq); |
| return ERR_PTR(status); |
| } |
| if (ib_ctx) { |
| status = ocrdma_copy_cq_uresp(cq, udata, ib_ctx); |
| if (status) |
| goto ctx_err; |
| } |
| cq->phase = OCRDMA_CQE_VALID; |
| cq->arm_needed = true; |
| 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; |
| } |
| |
| int ocrdma_destroy_cq(struct ib_cq *ibcq) |
| { |
| int status; |
| struct ocrdma_cq *cq = get_ocrdma_cq(ibcq); |
| struct ocrdma_dev *dev = cq->dev; |
| |
| if (atomic_read(&cq->use_cnt)) |
| return -EINVAL; |
| |
| status = ocrdma_mbx_destroy_cq(dev, cq); |
| |
| if (cq->ucontext) { |
| ocrdma_del_mmap(cq->ucontext, (u64) cq->pa, cq->len); |
| ocrdma_del_mmap(cq->ucontext, dev->nic_info.unmapped_db, |
| dev->nic_info.db_page_size); |
| } |
| dev->cq_tbl[cq->id] = NULL; |
| |
| kfree(cq); |
| return status; |
| } |
| |
| 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_UD) { |
| ocrdma_err("%s(%d) unsupported qp type=0x%x requested\n", |
| __func__, dev->id, attrs->qp_type); |
| return -EINVAL; |
| } |
| if (attrs->cap.max_send_wr > dev->attr.max_wqe) { |
| ocrdma_err("%s(%d) unsupported send_wr=0x%x requested\n", |
| __func__, dev->id, attrs->cap.max_send_wr); |
| ocrdma_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)) { |
| ocrdma_err("%s(%d) unsupported recv_wr=0x%x requested\n", |
| __func__, dev->id, attrs->cap.max_recv_wr); |
| ocrdma_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) { |
| ocrdma_err("%s(%d) unsupported inline data size=0x%x" |
| " requested\n", __func__, dev->id, |
| attrs->cap.max_inline_data); |
| ocrdma_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) { |
| ocrdma_err("%s(%d) unsupported send_sge=0x%x requested\n", |
| __func__, dev->id, attrs->cap.max_send_sge); |
| ocrdma_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) { |
| ocrdma_err("%s(%d) unsupported recv_sge=0x%x requested\n", |
| __func__, dev->id, attrs->cap.max_recv_sge); |
| ocrdma_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) { |
| ocrdma_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) { |
| ocrdma_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_sqcq == get_ocrdma_cq(attrs->send_cq))) { |
| ocrdma_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_dev *dev = qp->dev; |
| struct ocrdma_pd *pd = qp->pd; |
| |
| 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 = qp->sq.len; |
| uresp.sq_page_addr[0] = qp->sq.pa; |
| 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 = qp->rq.len; |
| uresp.rq_page_addr[0] = qp->rq.pa; |
| uresp.num_rqe_allocated = qp->rq.max_cnt; |
| } |
| uresp.db_page_addr = usr_db; |
| uresp.db_page_size = dev->nic_info.db_page_size; |
| if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) { |
| uresp.db_sq_offset = OCRDMA_DB_GEN2_SQ_OFFSET; |
| uresp.db_rq_offset = ((qp->id & 0xFFFF) < 128) ? |
| OCRDMA_DB_GEN2_RQ1_OFFSET : OCRDMA_DB_GEN2_RQ2_OFFSET; |
| uresp.db_shift = (qp->id < 128) ? 24 : 16; |
| } else { |
| uresp.db_sq_offset = OCRDMA_DB_SQ_OFFSET; |
| uresp.db_rq_offset = OCRDMA_DB_RQ_OFFSET; |
| uresp.db_shift = 16; |
| } |
| uresp.free_wqe_delta = qp->sq.free_delta; |
| uresp.free_rqe_delta = qp->rq.free_delta; |
| |
| 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) { |
| ocrdma_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 (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) { |
| 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) + |
| ((qp->id < 128) ? |
| OCRDMA_DB_GEN2_RQ1_OFFSET : OCRDMA_DB_GEN2_RQ2_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; |
| } |
| |
| static void ocrdma_set_qp_use_cnt(struct ocrdma_qp *qp, struct ocrdma_pd *pd) |
| { |
| atomic_inc(&pd->use_cnt); |
| atomic_inc(&qp->sq_cq->use_cnt); |
| atomic_inc(&qp->rq_cq->use_cnt); |
| if (qp->srq) |
| atomic_inc(&qp->srq->use_cnt); |
| qp->ibqp.qp_num = qp->id; |
| } |
| |
| 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 = pd->dev; |
| 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; |
| } |
| qp->dev = dev; |
| ocrdma_set_qp_init_params(qp, pd, attrs); |
| |
| 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) { |
| qp->cap_flags |= (OCRDMA_QP_MW_BIND | OCRDMA_QP_LKEY0 | |
| OCRDMA_QP_FAST_REG); |
| 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); |
| ocrdma_set_qp_use_cnt(qp, pd); |
| 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); |
| ocrdma_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 = qp->dev; |
| if (attr_mask & IB_QP_STATE) |
| status = ocrdma_qp_state_machine(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, old_qps); |
| 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 = qp->dev; |
| |
| /* 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)) { |
| ocrdma_err("%s(%d) invalid attribute mask=0x%x specified for " |
| "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 = qp->dev; |
| |
| 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; |
| qp_attr->qp_state = get_ibqp_state(IB_QPS_INIT); |
| qp_attr->cur_qp_state = get_ibqp_state(IB_QPS_INIT); |
| 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 = dev->attr.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_SQ_PSN_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->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; |
| mbx_err: |
| return status; |
| } |
| |
| static void ocrdma_srq_toggle_bit(struct ocrdma_srq *srq, int idx) |
| { |
| int i = idx / 32; |
| unsigned int mask = (1 << (idx % 32)); |
| |
| if (srq->idx_bit_fields[i] & mask) |
| srq->idx_bit_fields[i] &= ~mask; |
| else |
| srq->idx_bit_fields[i] |= mask; |
| } |
| |
| static int ocrdma_hwq_free_cnt(struct ocrdma_qp_hwq_info *q) |
| { |
| int free_cnt; |
| if (q->head >= q->tail) |
| free_cnt = (q->max_cnt - q->head) + q->tail; |
| else |
| free_cnt = q->tail - q->head; |
| if (q->free_delta) |
| free_cnt -= q->free_delta; |
| return free_cnt; |
| } |
| |
| static int is_hw_sq_empty(struct ocrdma_qp *qp) |
| { |
| return (qp->sq.tail == qp->sq.head && |
| ocrdma_hwq_free_cnt(&qp->sq) ? 1 : 0); |
| } |
| |
| static int is_hw_rq_empty(struct ocrdma_qp *qp) |
| { |
| return (qp->rq.tail == qp->rq.head) ? 1 : 0; |
| } |
| |
| 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; |
| |
| 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; |
| |
| /* mark cqe discarded so that it is not picked up later |
| * in the poll_cq(). |
| */ |
| discard_cnt += 1; |
| cqe->cmn.qpn = 0; |
| if (is_cqe_for_sq(cqe)) |
| ocrdma_hwq_inc_tail(&qp->sq); |
| else { |
| if (qp->srq) { |
| spin_lock_irqsave(&qp->srq->q_lock, flags); |
| ocrdma_hwq_inc_tail(&qp->srq->rq); |
| ocrdma_srq_toggle_bit(qp->srq, cur_getp); |
| spin_unlock_irqrestore(&qp->srq->q_lock, flags); |
| |
| } else |
| ocrdma_hwq_inc_tail(&qp->rq); |
| } |
| skip_cqe: |
| cur_getp = (cur_getp + 1) % cq->max_hw_cqe; |
| } while (cur_getp != stop_getp); |
| spin_unlock_irqrestore(&cq->cq_lock, cq_flags); |
| } |
| |
| static void ocrdma_del_flush_qp(struct ocrdma_qp *qp) |
| { |
| int found = false; |
| unsigned long flags; |
| struct ocrdma_dev *dev = qp->dev; |
| /* 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) |
| { |
| int status; |
| struct ocrdma_pd *pd; |
| struct ocrdma_qp *qp; |
| struct ocrdma_dev *dev; |
| struct ib_qp_attr attrs; |
| int attr_mask = IB_QP_STATE; |
| unsigned long wq_flags = 0, rq_flags = 0; |
| |
| qp = get_ocrdma_qp(ibqp); |
| dev = qp->dev; |
| |
| attrs.qp_state = IB_QPS_ERR; |
| pd = qp->pd; |
| |
| /* change the QP state to ERROR */ |
| _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); |
| status = 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, wq_flags); |
| if (qp->rq_cq && (qp->rq_cq != qp->sq_cq)) |
| spin_lock_irqsave(&qp->rq_cq->cq_lock, rq_flags); |
| |
| ocrdma_del_qpn_map(dev, qp); |
| |
| if (qp->rq_cq && (qp->rq_cq != qp->sq_cq)) |
| spin_unlock_irqrestore(&qp->rq_cq->cq_lock, rq_flags); |
| spin_unlock_irqrestore(&qp->sq_cq->cq_lock, wq_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, qp->sq.len); |
| if (!qp->srq) |
| ocrdma_del_mmap(pd->uctx, (u64) qp->rq.pa, qp->rq.len); |
| } |
| |
| ocrdma_del_flush_qp(qp); |
| |
| atomic_dec(&qp->pd->use_cnt); |
| atomic_dec(&qp->sq_cq->use_cnt); |
| atomic_dec(&qp->rq_cq->use_cnt); |
| if (qp->srq) |
| atomic_dec(&qp->srq->use_cnt); |
| kfree(qp->wqe_wr_id_tbl); |
| kfree(qp->rqe_wr_id_tbl); |
| kfree(qp); |
| return status; |
| } |
| |
| static int ocrdma_copy_srq_uresp(struct ocrdma_srq *srq, struct ib_udata *udata) |
| { |
| int status; |
| struct ocrdma_create_srq_uresp uresp; |
| |
| uresp.rq_dbid = srq->rq.dbid; |
| uresp.num_rq_pages = 1; |
| uresp.rq_page_addr[0] = srq->rq.pa; |
| uresp.rq_page_size = srq->rq.len; |
| uresp.db_page_addr = srq->dev->nic_info.unmapped_db + |
| (srq->pd->id * srq->dev->nic_info.db_page_size); |
| uresp.db_page_size = srq->dev->nic_info.db_page_size; |
| uresp.num_rqe_allocated = srq->rq.max_cnt; |
| uresp.free_rqe_delta = 1; |
| if (srq->dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) { |
| uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ1_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 = pd->dev; |
| 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->dev = dev; |
| srq->pd = pd; |
| srq->db = dev->nic_info.db + (pd->id * dev->nic_info.db_page_size); |
| status = ocrdma_mbx_create_srq(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; |
| } |
| |
| atomic_set(&srq->use_cnt, 0); |
| if (udata) { |
| status = ocrdma_copy_srq_uresp(srq, udata); |
| if (status) |
| goto arm_err; |
| } |
| |
| atomic_inc(&pd->use_cnt); |
| 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; |
| |
| srq = get_ocrdma_srq(ibsrq); |
| dev = srq->dev; |
| if (atomic_read(&srq->use_cnt)) { |
| ocrdma_err("%s(%d) err, srq=0x%x in use\n", |
| __func__, dev->id, srq->id); |
| return -EAGAIN; |
| } |
| |
| status = ocrdma_mbx_destroy_srq(dev, srq); |
| |
| if (srq->pd->uctx) |
| ocrdma_del_mmap(srq->pd->uctx, (u64) srq->rq.pa, srq->rq.len); |
| |
| atomic_dec(&srq->pd->use_cnt); |
| 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; |
| } |
| |
| 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 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) |
| { |
| if (wr->send_flags & IB_SEND_INLINE) { |
| if (wr->sg_list[0].length > qp->max_inline_data) { |
| ocrdma_err("%s() supported_len=0x%x," |
| " unspported len req=0x%x\n", __func__, |
| qp->max_inline_data, wr->sg_list[0].length); |
| return -EINVAL; |
| } |
| memcpy(sge, |
| (void *)(unsigned long)wr->sg_list[0].addr, |
| wr->sg_list[0].length); |
| hdr->total_len = wr->sg_list[0].length; |
| wqe_size += roundup(hdr->total_len, OCRDMA_WQE_ALIGN_BYTES); |
| 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 ocrdma_ring_sq_db(struct ocrdma_qp *qp) |
| { |
| u32 val = qp->sq.dbid | (1 << 16); |
| |
| 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); |
| return -EINVAL; |
| } |
| |
| while (wr) { |
| if (ocrdma_hwq_free_cnt(&qp->sq) == 0 || |
| wr->num_sge > qp->sq.max_sges) { |
| status = -ENOMEM; |
| break; |
| } |
| hdr = ocrdma_hwq_head(&qp->sq); |
| hdr->cw = 0; |
| if (wr->send_flags & IB_SEND_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_WITH_INV: |
| hdr->cw |= (OCRDMA_FLAG_INV << OCRDMA_WQE_FLAGS_SHIFT); |
| 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) / |
| OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT; |
| hdr->lkey = wr->ex.invalidate_rkey; |
| break; |
| default: |
| status = -EINVAL; |
| break; |
| } |
| if (status) { |
| *bad_wr = wr; |
| break; |
| } |
| if (wr->send_flags & IB_SEND_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_GET_NUM_POSTED_SHIFT_VAL(qp)); |
| |
| 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; |
| } |
| |
| 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 = IB_WC_GENERAL_ERR; |
| |
| 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_LKEY_INV: |
| ibwc->opcode = IB_WC_LOCAL_INV; |
| break; |
| default: |
| ibwc->status = IB_WC_GENERAL_ERR; |
| ocrdma_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_machine(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; |
| int status = (le32_to_cpu(cqe->flags_status_srcqpn) & |
| OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT; |
| |
| /* 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 { |
| *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) { |
| expand = true; /* CQE cannot be consumed yet */ |
| *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; |
| 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; |
| ibwc->wr_id = srq->rqe_wr_id_tbl[wqe_idx]; |
| spin_lock_irqsave(&srq->q_lock, flags); |
| ocrdma_srq_toggle_bit(srq, wqe_idx); |
| 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; |
| |
| /* 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 |
| 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 = cq->dev; |
| 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 (polled_hw_cqes || expand || stop) { |
| ocrdma_ring_cq_db(dev, cq->id, cq->armed, cq->solicited, |
| polled_hw_cqes); |
| } |
| 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 = NULL; |
| unsigned long flags; |
| struct ocrdma_dev *dev; |
| int num_os_cqe = 0, err_cqes = 0; |
| struct ocrdma_qp *qp; |
| |
| cq = get_ocrdma_cq(ibcq); |
| dev = cq->dev; |
| |
| /* 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; |
| unsigned long flags; |
| struct ocrdma_dev *dev; |
| u16 cq_id; |
| u16 cur_getp; |
| struct ocrdma_cqe *cqe; |
| |
| cq = get_ocrdma_cq(ibcq); |
| cq_id = cq->id; |
| dev = cq->dev; |
| |
| spin_lock_irqsave(&cq->cq_lock, flags); |
| if (cq_flags & IB_CQ_NEXT_COMP || cq_flags & IB_CQ_SOLICITED) |
| cq->armed = true; |
| if (cq_flags & IB_CQ_SOLICITED) |
| cq->solicited = true; |
| |
| cur_getp = cq->getp; |
| cqe = cq->va + cur_getp; |
| |
| /* check whether any valid cqe exist or not, if not then safe to |
| * arm. If cqe is not yet consumed, then let it get consumed and then |
| * we arm it to avoid false interrupts. |
| */ |
| if (!is_cqe_valid(cq, cqe) || cq->arm_needed) { |
| cq->arm_needed = false; |
| ocrdma_ring_cq_db(dev, cq_id, cq->armed, cq->solicited, 0); |
| } |
| spin_unlock_irqrestore(&cq->cq_lock, flags); |
| return 0; |
| } |