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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/infiniband/hw/efa/efa_verbs.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/infiniband/hw/efa/efa_verbs.c')
-rw-r--r--drivers/infiniband/hw/efa/efa_verbs.c2134
1 files changed, 2134 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/efa/efa_verbs.c b/drivers/infiniband/hw/efa/efa_verbs.c
new file mode 100644
index 000000000..90d5f1a96
--- /dev/null
+++ b/drivers/infiniband/hw/efa/efa_verbs.c
@@ -0,0 +1,2134 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/*
+ * Copyright 2018-2022 Amazon.com, Inc. or its affiliates. All rights reserved.
+ */
+
+#include <linux/dma-buf.h>
+#include <linux/dma-resv.h>
+#include <linux/vmalloc.h>
+#include <linux/log2.h>
+
+#include <rdma/ib_addr.h>
+#include <rdma/ib_umem.h>
+#include <rdma/ib_user_verbs.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/uverbs_ioctl.h>
+
+#include "efa.h"
+#include "efa_io_defs.h"
+
+enum {
+ EFA_MMAP_DMA_PAGE = 0,
+ EFA_MMAP_IO_WC,
+ EFA_MMAP_IO_NC,
+};
+
+#define EFA_AENQ_ENABLED_GROUPS \
+ (BIT(EFA_ADMIN_FATAL_ERROR) | BIT(EFA_ADMIN_WARNING) | \
+ BIT(EFA_ADMIN_NOTIFICATION) | BIT(EFA_ADMIN_KEEP_ALIVE))
+
+struct efa_user_mmap_entry {
+ struct rdma_user_mmap_entry rdma_entry;
+ u64 address;
+ u8 mmap_flag;
+};
+
+#define EFA_DEFINE_DEVICE_STATS(op) \
+ op(EFA_SUBMITTED_CMDS, "submitted_cmds") \
+ op(EFA_COMPLETED_CMDS, "completed_cmds") \
+ op(EFA_CMDS_ERR, "cmds_err") \
+ op(EFA_NO_COMPLETION_CMDS, "no_completion_cmds") \
+ op(EFA_KEEP_ALIVE_RCVD, "keep_alive_rcvd") \
+ op(EFA_ALLOC_PD_ERR, "alloc_pd_err") \
+ op(EFA_CREATE_QP_ERR, "create_qp_err") \
+ op(EFA_CREATE_CQ_ERR, "create_cq_err") \
+ op(EFA_REG_MR_ERR, "reg_mr_err") \
+ op(EFA_ALLOC_UCONTEXT_ERR, "alloc_ucontext_err") \
+ op(EFA_CREATE_AH_ERR, "create_ah_err") \
+ op(EFA_MMAP_ERR, "mmap_err")
+
+#define EFA_DEFINE_PORT_STATS(op) \
+ op(EFA_TX_BYTES, "tx_bytes") \
+ op(EFA_TX_PKTS, "tx_pkts") \
+ op(EFA_RX_BYTES, "rx_bytes") \
+ op(EFA_RX_PKTS, "rx_pkts") \
+ op(EFA_RX_DROPS, "rx_drops") \
+ op(EFA_SEND_BYTES, "send_bytes") \
+ op(EFA_SEND_WRS, "send_wrs") \
+ op(EFA_RECV_BYTES, "recv_bytes") \
+ op(EFA_RECV_WRS, "recv_wrs") \
+ op(EFA_RDMA_READ_WRS, "rdma_read_wrs") \
+ op(EFA_RDMA_READ_BYTES, "rdma_read_bytes") \
+ op(EFA_RDMA_READ_WR_ERR, "rdma_read_wr_err") \
+ op(EFA_RDMA_READ_RESP_BYTES, "rdma_read_resp_bytes") \
+
+#define EFA_STATS_ENUM(ename, name) ename,
+#define EFA_STATS_STR(ename, nam) \
+ [ename].name = nam,
+
+enum efa_hw_device_stats {
+ EFA_DEFINE_DEVICE_STATS(EFA_STATS_ENUM)
+};
+
+static const struct rdma_stat_desc efa_device_stats_descs[] = {
+ EFA_DEFINE_DEVICE_STATS(EFA_STATS_STR)
+};
+
+enum efa_hw_port_stats {
+ EFA_DEFINE_PORT_STATS(EFA_STATS_ENUM)
+};
+
+static const struct rdma_stat_desc efa_port_stats_descs[] = {
+ EFA_DEFINE_PORT_STATS(EFA_STATS_STR)
+};
+
+#define EFA_CHUNK_PAYLOAD_SHIFT 12
+#define EFA_CHUNK_PAYLOAD_SIZE BIT(EFA_CHUNK_PAYLOAD_SHIFT)
+#define EFA_CHUNK_PAYLOAD_PTR_SIZE 8
+
+#define EFA_CHUNK_SHIFT 12
+#define EFA_CHUNK_SIZE BIT(EFA_CHUNK_SHIFT)
+#define EFA_CHUNK_PTR_SIZE sizeof(struct efa_com_ctrl_buff_info)
+
+#define EFA_PTRS_PER_CHUNK \
+ ((EFA_CHUNK_SIZE - EFA_CHUNK_PTR_SIZE) / EFA_CHUNK_PAYLOAD_PTR_SIZE)
+
+#define EFA_CHUNK_USED_SIZE \
+ ((EFA_PTRS_PER_CHUNK * EFA_CHUNK_PAYLOAD_PTR_SIZE) + EFA_CHUNK_PTR_SIZE)
+
+struct pbl_chunk {
+ dma_addr_t dma_addr;
+ u64 *buf;
+ u32 length;
+};
+
+struct pbl_chunk_list {
+ struct pbl_chunk *chunks;
+ unsigned int size;
+};
+
+struct pbl_context {
+ union {
+ struct {
+ dma_addr_t dma_addr;
+ } continuous;
+ struct {
+ u32 pbl_buf_size_in_pages;
+ struct scatterlist *sgl;
+ int sg_dma_cnt;
+ struct pbl_chunk_list chunk_list;
+ } indirect;
+ } phys;
+ u64 *pbl_buf;
+ u32 pbl_buf_size_in_bytes;
+ u8 physically_continuous;
+};
+
+static inline struct efa_dev *to_edev(struct ib_device *ibdev)
+{
+ return container_of(ibdev, struct efa_dev, ibdev);
+}
+
+static inline struct efa_ucontext *to_eucontext(struct ib_ucontext *ibucontext)
+{
+ return container_of(ibucontext, struct efa_ucontext, ibucontext);
+}
+
+static inline struct efa_pd *to_epd(struct ib_pd *ibpd)
+{
+ return container_of(ibpd, struct efa_pd, ibpd);
+}
+
+static inline struct efa_mr *to_emr(struct ib_mr *ibmr)
+{
+ return container_of(ibmr, struct efa_mr, ibmr);
+}
+
+static inline struct efa_qp *to_eqp(struct ib_qp *ibqp)
+{
+ return container_of(ibqp, struct efa_qp, ibqp);
+}
+
+static inline struct efa_cq *to_ecq(struct ib_cq *ibcq)
+{
+ return container_of(ibcq, struct efa_cq, ibcq);
+}
+
+static inline struct efa_ah *to_eah(struct ib_ah *ibah)
+{
+ return container_of(ibah, struct efa_ah, ibah);
+}
+
+static inline struct efa_user_mmap_entry *
+to_emmap(struct rdma_user_mmap_entry *rdma_entry)
+{
+ return container_of(rdma_entry, struct efa_user_mmap_entry, rdma_entry);
+}
+
+#define EFA_DEV_CAP(dev, cap) \
+ ((dev)->dev_attr.device_caps & \
+ EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_##cap##_MASK)
+
+#define is_reserved_cleared(reserved) \
+ !memchr_inv(reserved, 0, sizeof(reserved))
+
+static void *efa_zalloc_mapped(struct efa_dev *dev, dma_addr_t *dma_addr,
+ size_t size, enum dma_data_direction dir)
+{
+ void *addr;
+
+ addr = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
+ if (!addr)
+ return NULL;
+
+ *dma_addr = dma_map_single(&dev->pdev->dev, addr, size, dir);
+ if (dma_mapping_error(&dev->pdev->dev, *dma_addr)) {
+ ibdev_err(&dev->ibdev, "Failed to map DMA address\n");
+ free_pages_exact(addr, size);
+ return NULL;
+ }
+
+ return addr;
+}
+
+static void efa_free_mapped(struct efa_dev *dev, void *cpu_addr,
+ dma_addr_t dma_addr,
+ size_t size, enum dma_data_direction dir)
+{
+ dma_unmap_single(&dev->pdev->dev, dma_addr, size, dir);
+ free_pages_exact(cpu_addr, size);
+}
+
+int efa_query_device(struct ib_device *ibdev,
+ struct ib_device_attr *props,
+ struct ib_udata *udata)
+{
+ struct efa_com_get_device_attr_result *dev_attr;
+ struct efa_ibv_ex_query_device_resp resp = {};
+ struct efa_dev *dev = to_edev(ibdev);
+ int err;
+
+ if (udata && udata->inlen &&
+ !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+ ibdev_dbg(ibdev,
+ "Incompatible ABI params, udata not cleared\n");
+ return -EINVAL;
+ }
+
+ dev_attr = &dev->dev_attr;
+
+ memset(props, 0, sizeof(*props));
+ props->max_mr_size = dev_attr->max_mr_pages * PAGE_SIZE;
+ props->page_size_cap = dev_attr->page_size_cap;
+ props->vendor_id = dev->pdev->vendor;
+ props->vendor_part_id = dev->pdev->device;
+ props->hw_ver = dev->pdev->subsystem_device;
+ props->max_qp = dev_attr->max_qp;
+ props->max_cq = dev_attr->max_cq;
+ props->max_pd = dev_attr->max_pd;
+ props->max_mr = dev_attr->max_mr;
+ props->max_ah = dev_attr->max_ah;
+ props->max_cqe = dev_attr->max_cq_depth;
+ props->max_qp_wr = min_t(u32, dev_attr->max_sq_depth,
+ dev_attr->max_rq_depth);
+ props->max_send_sge = dev_attr->max_sq_sge;
+ props->max_recv_sge = dev_attr->max_rq_sge;
+ props->max_sge_rd = dev_attr->max_wr_rdma_sge;
+ props->max_pkeys = 1;
+
+ if (udata && udata->outlen) {
+ resp.max_sq_sge = dev_attr->max_sq_sge;
+ resp.max_rq_sge = dev_attr->max_rq_sge;
+ resp.max_sq_wr = dev_attr->max_sq_depth;
+ resp.max_rq_wr = dev_attr->max_rq_depth;
+ resp.max_rdma_size = dev_attr->max_rdma_size;
+
+ resp.device_caps |= EFA_QUERY_DEVICE_CAPS_CQ_WITH_SGID;
+ if (EFA_DEV_CAP(dev, RDMA_READ))
+ resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_READ;
+
+ if (EFA_DEV_CAP(dev, RNR_RETRY))
+ resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RNR_RETRY;
+
+ if (dev->neqs)
+ resp.device_caps |= EFA_QUERY_DEVICE_CAPS_CQ_NOTIFICATIONS;
+
+ err = ib_copy_to_udata(udata, &resp,
+ min(sizeof(resp), udata->outlen));
+ if (err) {
+ ibdev_dbg(ibdev,
+ "Failed to copy udata for query_device\n");
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+int efa_query_port(struct ib_device *ibdev, u32 port,
+ struct ib_port_attr *props)
+{
+ struct efa_dev *dev = to_edev(ibdev);
+
+ props->lmc = 1;
+
+ props->state = IB_PORT_ACTIVE;
+ props->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
+ props->gid_tbl_len = 1;
+ props->pkey_tbl_len = 1;
+ props->active_speed = IB_SPEED_EDR;
+ props->active_width = IB_WIDTH_4X;
+ props->max_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);
+ props->active_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);
+ props->max_msg_sz = dev->dev_attr.mtu;
+ props->max_vl_num = 1;
+
+ return 0;
+}
+
+int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
+ int qp_attr_mask,
+ struct ib_qp_init_attr *qp_init_attr)
+{
+ struct efa_dev *dev = to_edev(ibqp->device);
+ struct efa_com_query_qp_params params = {};
+ struct efa_com_query_qp_result result;
+ struct efa_qp *qp = to_eqp(ibqp);
+ int err;
+
+#define EFA_QUERY_QP_SUPP_MASK \
+ (IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT | \
+ IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP | IB_QP_RNR_RETRY)
+
+ if (qp_attr_mask & ~EFA_QUERY_QP_SUPP_MASK) {
+ ibdev_dbg(&dev->ibdev,
+ "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
+ qp_attr_mask, EFA_QUERY_QP_SUPP_MASK);
+ return -EOPNOTSUPP;
+ }
+
+ memset(qp_attr, 0, sizeof(*qp_attr));
+ memset(qp_init_attr, 0, sizeof(*qp_init_attr));
+
+ params.qp_handle = qp->qp_handle;
+ err = efa_com_query_qp(&dev->edev, &params, &result);
+ if (err)
+ return err;
+
+ qp_attr->qp_state = result.qp_state;
+ qp_attr->qkey = result.qkey;
+ qp_attr->sq_psn = result.sq_psn;
+ qp_attr->sq_draining = result.sq_draining;
+ qp_attr->port_num = 1;
+ qp_attr->rnr_retry = result.rnr_retry;
+
+ qp_attr->cap.max_send_wr = qp->max_send_wr;
+ qp_attr->cap.max_recv_wr = qp->max_recv_wr;
+ qp_attr->cap.max_send_sge = qp->max_send_sge;
+ qp_attr->cap.max_recv_sge = qp->max_recv_sge;
+ qp_attr->cap.max_inline_data = qp->max_inline_data;
+
+ qp_init_attr->qp_type = ibqp->qp_type;
+ qp_init_attr->recv_cq = ibqp->recv_cq;
+ qp_init_attr->send_cq = ibqp->send_cq;
+ qp_init_attr->qp_context = ibqp->qp_context;
+ qp_init_attr->cap = qp_attr->cap;
+
+ return 0;
+}
+
+int efa_query_gid(struct ib_device *ibdev, u32 port, int index,
+ union ib_gid *gid)
+{
+ struct efa_dev *dev = to_edev(ibdev);
+
+ memcpy(gid->raw, dev->dev_attr.addr, sizeof(dev->dev_attr.addr));
+
+ return 0;
+}
+
+int efa_query_pkey(struct ib_device *ibdev, u32 port, u16 index,
+ u16 *pkey)
+{
+ if (index > 0)
+ return -EINVAL;
+
+ *pkey = 0xffff;
+ return 0;
+}
+
+static int efa_pd_dealloc(struct efa_dev *dev, u16 pdn)
+{
+ struct efa_com_dealloc_pd_params params = {
+ .pdn = pdn,
+ };
+
+ return efa_com_dealloc_pd(&dev->edev, &params);
+}
+
+int efa_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
+{
+ struct efa_dev *dev = to_edev(ibpd->device);
+ struct efa_ibv_alloc_pd_resp resp = {};
+ struct efa_com_alloc_pd_result result;
+ struct efa_pd *pd = to_epd(ibpd);
+ int err;
+
+ if (udata->inlen &&
+ !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+ ibdev_dbg(&dev->ibdev,
+ "Incompatible ABI params, udata not cleared\n");
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ err = efa_com_alloc_pd(&dev->edev, &result);
+ if (err)
+ goto err_out;
+
+ pd->pdn = result.pdn;
+ resp.pdn = result.pdn;
+
+ if (udata->outlen) {
+ err = ib_copy_to_udata(udata, &resp,
+ min(sizeof(resp), udata->outlen));
+ if (err) {
+ ibdev_dbg(&dev->ibdev,
+ "Failed to copy udata for alloc_pd\n");
+ goto err_dealloc_pd;
+ }
+ }
+
+ ibdev_dbg(&dev->ibdev, "Allocated pd[%d]\n", pd->pdn);
+
+ return 0;
+
+err_dealloc_pd:
+ efa_pd_dealloc(dev, result.pdn);
+err_out:
+ atomic64_inc(&dev->stats.alloc_pd_err);
+ return err;
+}
+
+int efa_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
+{
+ struct efa_dev *dev = to_edev(ibpd->device);
+ struct efa_pd *pd = to_epd(ibpd);
+
+ ibdev_dbg(&dev->ibdev, "Dealloc pd[%d]\n", pd->pdn);
+ efa_pd_dealloc(dev, pd->pdn);
+ return 0;
+}
+
+static int efa_destroy_qp_handle(struct efa_dev *dev, u32 qp_handle)
+{
+ struct efa_com_destroy_qp_params params = { .qp_handle = qp_handle };
+
+ return efa_com_destroy_qp(&dev->edev, &params);
+}
+
+static void efa_qp_user_mmap_entries_remove(struct efa_qp *qp)
+{
+ rdma_user_mmap_entry_remove(qp->rq_mmap_entry);
+ rdma_user_mmap_entry_remove(qp->rq_db_mmap_entry);
+ rdma_user_mmap_entry_remove(qp->llq_desc_mmap_entry);
+ rdma_user_mmap_entry_remove(qp->sq_db_mmap_entry);
+}
+
+int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
+{
+ struct efa_dev *dev = to_edev(ibqp->pd->device);
+ struct efa_qp *qp = to_eqp(ibqp);
+ int err;
+
+ ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num);
+
+ err = efa_destroy_qp_handle(dev, qp->qp_handle);
+ if (err)
+ return err;
+
+ efa_qp_user_mmap_entries_remove(qp);
+
+ if (qp->rq_cpu_addr) {
+ ibdev_dbg(&dev->ibdev,
+ "qp->cpu_addr[0x%p] freed: size[%lu], dma[%pad]\n",
+ qp->rq_cpu_addr, qp->rq_size,
+ &qp->rq_dma_addr);
+ efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr,
+ qp->rq_size, DMA_TO_DEVICE);
+ }
+
+ return 0;
+}
+
+static struct rdma_user_mmap_entry*
+efa_user_mmap_entry_insert(struct ib_ucontext *ucontext,
+ u64 address, size_t length,
+ u8 mmap_flag, u64 *offset)
+{
+ struct efa_user_mmap_entry *entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+ int err;
+
+ if (!entry)
+ return NULL;
+
+ entry->address = address;
+ entry->mmap_flag = mmap_flag;
+
+ err = rdma_user_mmap_entry_insert(ucontext, &entry->rdma_entry,
+ length);
+ if (err) {
+ kfree(entry);
+ return NULL;
+ }
+ *offset = rdma_user_mmap_get_offset(&entry->rdma_entry);
+
+ return &entry->rdma_entry;
+}
+
+static int qp_mmap_entries_setup(struct efa_qp *qp,
+ struct efa_dev *dev,
+ struct efa_ucontext *ucontext,
+ struct efa_com_create_qp_params *params,
+ struct efa_ibv_create_qp_resp *resp)
+{
+ size_t length;
+ u64 address;
+
+ address = dev->db_bar_addr + resp->sq_db_offset;
+ qp->sq_db_mmap_entry =
+ efa_user_mmap_entry_insert(&ucontext->ibucontext,
+ address,
+ PAGE_SIZE, EFA_MMAP_IO_NC,
+ &resp->sq_db_mmap_key);
+ if (!qp->sq_db_mmap_entry)
+ return -ENOMEM;
+
+ resp->sq_db_offset &= ~PAGE_MASK;
+
+ address = dev->mem_bar_addr + resp->llq_desc_offset;
+ length = PAGE_ALIGN(params->sq_ring_size_in_bytes +
+ (resp->llq_desc_offset & ~PAGE_MASK));
+
+ qp->llq_desc_mmap_entry =
+ efa_user_mmap_entry_insert(&ucontext->ibucontext,
+ address, length,
+ EFA_MMAP_IO_WC,
+ &resp->llq_desc_mmap_key);
+ if (!qp->llq_desc_mmap_entry)
+ goto err_remove_mmap;
+
+ resp->llq_desc_offset &= ~PAGE_MASK;
+
+ if (qp->rq_size) {
+ address = dev->db_bar_addr + resp->rq_db_offset;
+
+ qp->rq_db_mmap_entry =
+ efa_user_mmap_entry_insert(&ucontext->ibucontext,
+ address, PAGE_SIZE,
+ EFA_MMAP_IO_NC,
+ &resp->rq_db_mmap_key);
+ if (!qp->rq_db_mmap_entry)
+ goto err_remove_mmap;
+
+ resp->rq_db_offset &= ~PAGE_MASK;
+
+ address = virt_to_phys(qp->rq_cpu_addr);
+ qp->rq_mmap_entry =
+ efa_user_mmap_entry_insert(&ucontext->ibucontext,
+ address, qp->rq_size,
+ EFA_MMAP_DMA_PAGE,
+ &resp->rq_mmap_key);
+ if (!qp->rq_mmap_entry)
+ goto err_remove_mmap;
+
+ resp->rq_mmap_size = qp->rq_size;
+ }
+
+ return 0;
+
+err_remove_mmap:
+ efa_qp_user_mmap_entries_remove(qp);
+
+ return -ENOMEM;
+}
+
+static int efa_qp_validate_cap(struct efa_dev *dev,
+ struct ib_qp_init_attr *init_attr)
+{
+ if (init_attr->cap.max_send_wr > dev->dev_attr.max_sq_depth) {
+ ibdev_dbg(&dev->ibdev,
+ "qp: requested send wr[%u] exceeds the max[%u]\n",
+ init_attr->cap.max_send_wr,
+ dev->dev_attr.max_sq_depth);
+ return -EINVAL;
+ }
+ if (init_attr->cap.max_recv_wr > dev->dev_attr.max_rq_depth) {
+ ibdev_dbg(&dev->ibdev,
+ "qp: requested receive wr[%u] exceeds the max[%u]\n",
+ init_attr->cap.max_recv_wr,
+ dev->dev_attr.max_rq_depth);
+ return -EINVAL;
+ }
+ if (init_attr->cap.max_send_sge > dev->dev_attr.max_sq_sge) {
+ ibdev_dbg(&dev->ibdev,
+ "qp: requested sge send[%u] exceeds the max[%u]\n",
+ init_attr->cap.max_send_sge, dev->dev_attr.max_sq_sge);
+ return -EINVAL;
+ }
+ if (init_attr->cap.max_recv_sge > dev->dev_attr.max_rq_sge) {
+ ibdev_dbg(&dev->ibdev,
+ "qp: requested sge recv[%u] exceeds the max[%u]\n",
+ init_attr->cap.max_recv_sge, dev->dev_attr.max_rq_sge);
+ return -EINVAL;
+ }
+ if (init_attr->cap.max_inline_data > dev->dev_attr.inline_buf_size) {
+ ibdev_dbg(&dev->ibdev,
+ "qp: requested inline data[%u] exceeds the max[%u]\n",
+ init_attr->cap.max_inline_data,
+ dev->dev_attr.inline_buf_size);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int efa_qp_validate_attr(struct efa_dev *dev,
+ struct ib_qp_init_attr *init_attr)
+{
+ if (init_attr->qp_type != IB_QPT_DRIVER &&
+ init_attr->qp_type != IB_QPT_UD) {
+ ibdev_dbg(&dev->ibdev,
+ "Unsupported qp type %d\n", init_attr->qp_type);
+ return -EOPNOTSUPP;
+ }
+
+ if (init_attr->srq) {
+ ibdev_dbg(&dev->ibdev, "SRQ is not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (init_attr->create_flags) {
+ ibdev_dbg(&dev->ibdev, "Unsupported create flags\n");
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+int efa_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr,
+ struct ib_udata *udata)
+{
+ struct efa_com_create_qp_params create_qp_params = {};
+ struct efa_com_create_qp_result create_qp_resp;
+ struct efa_dev *dev = to_edev(ibqp->device);
+ struct efa_ibv_create_qp_resp resp = {};
+ struct efa_ibv_create_qp cmd = {};
+ struct efa_qp *qp = to_eqp(ibqp);
+ struct efa_ucontext *ucontext;
+ int err;
+
+ ucontext = rdma_udata_to_drv_context(udata, struct efa_ucontext,
+ ibucontext);
+
+ err = efa_qp_validate_cap(dev, init_attr);
+ if (err)
+ goto err_out;
+
+ err = efa_qp_validate_attr(dev, init_attr);
+ if (err)
+ goto err_out;
+
+ if (offsetofend(typeof(cmd), driver_qp_type) > udata->inlen) {
+ ibdev_dbg(&dev->ibdev,
+ "Incompatible ABI params, no input udata\n");
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ if (udata->inlen > sizeof(cmd) &&
+ !ib_is_udata_cleared(udata, sizeof(cmd),
+ udata->inlen - sizeof(cmd))) {
+ ibdev_dbg(&dev->ibdev,
+ "Incompatible ABI params, unknown fields in udata\n");
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ err = ib_copy_from_udata(&cmd, udata,
+ min(sizeof(cmd), udata->inlen));
+ if (err) {
+ ibdev_dbg(&dev->ibdev,
+ "Cannot copy udata for create_qp\n");
+ goto err_out;
+ }
+
+ if (cmd.comp_mask) {
+ ibdev_dbg(&dev->ibdev,
+ "Incompatible ABI params, unknown fields in udata\n");
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ create_qp_params.uarn = ucontext->uarn;
+ create_qp_params.pd = to_epd(ibqp->pd)->pdn;
+
+ if (init_attr->qp_type == IB_QPT_UD) {
+ create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_UD;
+ } else if (cmd.driver_qp_type == EFA_QP_DRIVER_TYPE_SRD) {
+ create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_SRD;
+ } else {
+ ibdev_dbg(&dev->ibdev,
+ "Unsupported qp type %d driver qp type %d\n",
+ init_attr->qp_type, cmd.driver_qp_type);
+ err = -EOPNOTSUPP;
+ goto err_out;
+ }
+
+ ibdev_dbg(&dev->ibdev, "Create QP: qp type %d driver qp type %#x\n",
+ init_attr->qp_type, cmd.driver_qp_type);
+ create_qp_params.send_cq_idx = to_ecq(init_attr->send_cq)->cq_idx;
+ create_qp_params.recv_cq_idx = to_ecq(init_attr->recv_cq)->cq_idx;
+ create_qp_params.sq_depth = init_attr->cap.max_send_wr;
+ create_qp_params.sq_ring_size_in_bytes = cmd.sq_ring_size;
+
+ create_qp_params.rq_depth = init_attr->cap.max_recv_wr;
+ create_qp_params.rq_ring_size_in_bytes = cmd.rq_ring_size;
+ qp->rq_size = PAGE_ALIGN(create_qp_params.rq_ring_size_in_bytes);
+ if (qp->rq_size) {
+ qp->rq_cpu_addr = efa_zalloc_mapped(dev, &qp->rq_dma_addr,
+ qp->rq_size, DMA_TO_DEVICE);
+ if (!qp->rq_cpu_addr) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+
+ ibdev_dbg(&dev->ibdev,
+ "qp->cpu_addr[0x%p] allocated: size[%lu], dma[%pad]\n",
+ qp->rq_cpu_addr, qp->rq_size, &qp->rq_dma_addr);
+ create_qp_params.rq_base_addr = qp->rq_dma_addr;
+ }
+
+ err = efa_com_create_qp(&dev->edev, &create_qp_params,
+ &create_qp_resp);
+ if (err)
+ goto err_free_mapped;
+
+ resp.sq_db_offset = create_qp_resp.sq_db_offset;
+ resp.rq_db_offset = create_qp_resp.rq_db_offset;
+ resp.llq_desc_offset = create_qp_resp.llq_descriptors_offset;
+ resp.send_sub_cq_idx = create_qp_resp.send_sub_cq_idx;
+ resp.recv_sub_cq_idx = create_qp_resp.recv_sub_cq_idx;
+
+ err = qp_mmap_entries_setup(qp, dev, ucontext, &create_qp_params,
+ &resp);
+ if (err)
+ goto err_destroy_qp;
+
+ qp->qp_handle = create_qp_resp.qp_handle;
+ qp->ibqp.qp_num = create_qp_resp.qp_num;
+ qp->max_send_wr = init_attr->cap.max_send_wr;
+ qp->max_recv_wr = init_attr->cap.max_recv_wr;
+ qp->max_send_sge = init_attr->cap.max_send_sge;
+ qp->max_recv_sge = init_attr->cap.max_recv_sge;
+ qp->max_inline_data = init_attr->cap.max_inline_data;
+
+ if (udata->outlen) {
+ err = ib_copy_to_udata(udata, &resp,
+ min(sizeof(resp), udata->outlen));
+ if (err) {
+ ibdev_dbg(&dev->ibdev,
+ "Failed to copy udata for qp[%u]\n",
+ create_qp_resp.qp_num);
+ goto err_remove_mmap_entries;
+ }
+ }
+
+ ibdev_dbg(&dev->ibdev, "Created qp[%d]\n", qp->ibqp.qp_num);
+
+ return 0;
+
+err_remove_mmap_entries:
+ efa_qp_user_mmap_entries_remove(qp);
+err_destroy_qp:
+ efa_destroy_qp_handle(dev, create_qp_resp.qp_handle);
+err_free_mapped:
+ if (qp->rq_size)
+ efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr,
+ qp->rq_size, DMA_TO_DEVICE);
+err_out:
+ atomic64_inc(&dev->stats.create_qp_err);
+ return err;
+}
+
+static const struct {
+ int valid;
+ enum ib_qp_attr_mask req_param;
+ enum ib_qp_attr_mask opt_param;
+} srd_qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
+ [IB_QPS_RESET] = {
+ [IB_QPS_RESET] = { .valid = 1 },
+ [IB_QPS_INIT] = {
+ .valid = 1,
+ .req_param = IB_QP_PKEY_INDEX |
+ IB_QP_PORT |
+ IB_QP_QKEY,
+ },
+ },
+ [IB_QPS_INIT] = {
+ [IB_QPS_RESET] = { .valid = 1 },
+ [IB_QPS_ERR] = { .valid = 1 },
+ [IB_QPS_INIT] = {
+ .valid = 1,
+ .opt_param = IB_QP_PKEY_INDEX |
+ IB_QP_PORT |
+ IB_QP_QKEY,
+ },
+ [IB_QPS_RTR] = {
+ .valid = 1,
+ .opt_param = IB_QP_PKEY_INDEX |
+ IB_QP_QKEY,
+ },
+ },
+ [IB_QPS_RTR] = {
+ [IB_QPS_RESET] = { .valid = 1 },
+ [IB_QPS_ERR] = { .valid = 1 },
+ [IB_QPS_RTS] = {
+ .valid = 1,
+ .req_param = IB_QP_SQ_PSN,
+ .opt_param = IB_QP_CUR_STATE |
+ IB_QP_QKEY |
+ IB_QP_RNR_RETRY,
+
+ }
+ },
+ [IB_QPS_RTS] = {
+ [IB_QPS_RESET] = { .valid = 1 },
+ [IB_QPS_ERR] = { .valid = 1 },
+ [IB_QPS_RTS] = {
+ .valid = 1,
+ .opt_param = IB_QP_CUR_STATE |
+ IB_QP_QKEY,
+ },
+ [IB_QPS_SQD] = {
+ .valid = 1,
+ .opt_param = IB_QP_EN_SQD_ASYNC_NOTIFY,
+ },
+ },
+ [IB_QPS_SQD] = {
+ [IB_QPS_RESET] = { .valid = 1 },
+ [IB_QPS_ERR] = { .valid = 1 },
+ [IB_QPS_RTS] = {
+ .valid = 1,
+ .opt_param = IB_QP_CUR_STATE |
+ IB_QP_QKEY,
+ },
+ [IB_QPS_SQD] = {
+ .valid = 1,
+ .opt_param = IB_QP_PKEY_INDEX |
+ IB_QP_QKEY,
+ }
+ },
+ [IB_QPS_SQE] = {
+ [IB_QPS_RESET] = { .valid = 1 },
+ [IB_QPS_ERR] = { .valid = 1 },
+ [IB_QPS_RTS] = {
+ .valid = 1,
+ .opt_param = IB_QP_CUR_STATE |
+ IB_QP_QKEY,
+ }
+ },
+ [IB_QPS_ERR] = {
+ [IB_QPS_RESET] = { .valid = 1 },
+ [IB_QPS_ERR] = { .valid = 1 },
+ }
+};
+
+static bool efa_modify_srd_qp_is_ok(enum ib_qp_state cur_state,
+ enum ib_qp_state next_state,
+ enum ib_qp_attr_mask mask)
+{
+ enum ib_qp_attr_mask req_param, opt_param;
+
+ if (mask & IB_QP_CUR_STATE &&
+ cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
+ cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
+ return false;
+
+ if (!srd_qp_state_table[cur_state][next_state].valid)
+ return false;
+
+ req_param = srd_qp_state_table[cur_state][next_state].req_param;
+ opt_param = srd_qp_state_table[cur_state][next_state].opt_param;
+
+ if ((mask & req_param) != req_param)
+ return false;
+
+ if (mask & ~(req_param | opt_param | IB_QP_STATE))
+ return false;
+
+ return true;
+}
+
+static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp,
+ struct ib_qp_attr *qp_attr, int qp_attr_mask,
+ enum ib_qp_state cur_state,
+ enum ib_qp_state new_state)
+{
+ int err;
+
+#define EFA_MODIFY_QP_SUPP_MASK \
+ (IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \
+ IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN | \
+ IB_QP_RNR_RETRY)
+
+ if (qp_attr_mask & ~EFA_MODIFY_QP_SUPP_MASK) {
+ ibdev_dbg(&dev->ibdev,
+ "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
+ qp_attr_mask, EFA_MODIFY_QP_SUPP_MASK);
+ return -EOPNOTSUPP;
+ }
+
+ if (qp->ibqp.qp_type == IB_QPT_DRIVER)
+ err = !efa_modify_srd_qp_is_ok(cur_state, new_state,
+ qp_attr_mask);
+ else
+ err = !ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD,
+ qp_attr_mask);
+
+ if (err) {
+ ibdev_dbg(&dev->ibdev, "Invalid modify QP parameters\n");
+ return -EINVAL;
+ }
+
+ if ((qp_attr_mask & IB_QP_PORT) && qp_attr->port_num != 1) {
+ ibdev_dbg(&dev->ibdev, "Can't change port num\n");
+ return -EOPNOTSUPP;
+ }
+
+ if ((qp_attr_mask & IB_QP_PKEY_INDEX) && qp_attr->pkey_index) {
+ ibdev_dbg(&dev->ibdev, "Can't change pkey index\n");
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
+ int qp_attr_mask, struct ib_udata *udata)
+{
+ struct efa_dev *dev = to_edev(ibqp->device);
+ struct efa_com_modify_qp_params params = {};
+ struct efa_qp *qp = to_eqp(ibqp);
+ enum ib_qp_state cur_state;
+ enum ib_qp_state new_state;
+ int err;
+
+ if (qp_attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
+ return -EOPNOTSUPP;
+
+ if (udata->inlen &&
+ !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+ ibdev_dbg(&dev->ibdev,
+ "Incompatible ABI params, udata not cleared\n");
+ return -EINVAL;
+ }
+
+ cur_state = qp_attr_mask & IB_QP_CUR_STATE ? qp_attr->cur_qp_state :
+ qp->state;
+ new_state = qp_attr_mask & IB_QP_STATE ? qp_attr->qp_state : cur_state;
+
+ err = efa_modify_qp_validate(dev, qp, qp_attr, qp_attr_mask, cur_state,
+ new_state);
+ if (err)
+ return err;
+
+ params.qp_handle = qp->qp_handle;
+
+ if (qp_attr_mask & IB_QP_STATE) {
+ EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QP_STATE,
+ 1);
+ EFA_SET(&params.modify_mask,
+ EFA_ADMIN_MODIFY_QP_CMD_CUR_QP_STATE, 1);
+ params.cur_qp_state = cur_state;
+ params.qp_state = new_state;
+ }
+
+ if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
+ EFA_SET(&params.modify_mask,
+ EFA_ADMIN_MODIFY_QP_CMD_SQ_DRAINED_ASYNC_NOTIFY, 1);
+ params.sq_drained_async_notify = qp_attr->en_sqd_async_notify;
+ }
+
+ if (qp_attr_mask & IB_QP_QKEY) {
+ EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QKEY, 1);
+ params.qkey = qp_attr->qkey;
+ }
+
+ if (qp_attr_mask & IB_QP_SQ_PSN) {
+ EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_SQ_PSN, 1);
+ params.sq_psn = qp_attr->sq_psn;
+ }
+
+ if (qp_attr_mask & IB_QP_RNR_RETRY) {
+ EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_RNR_RETRY,
+ 1);
+ params.rnr_retry = qp_attr->rnr_retry;
+ }
+
+ err = efa_com_modify_qp(&dev->edev, &params);
+ if (err)
+ return err;
+
+ qp->state = new_state;
+
+ return 0;
+}
+
+static int efa_destroy_cq_idx(struct efa_dev *dev, int cq_idx)
+{
+ struct efa_com_destroy_cq_params params = { .cq_idx = cq_idx };
+
+ return efa_com_destroy_cq(&dev->edev, &params);
+}
+
+static void efa_cq_user_mmap_entries_remove(struct efa_cq *cq)
+{
+ rdma_user_mmap_entry_remove(cq->db_mmap_entry);
+ rdma_user_mmap_entry_remove(cq->mmap_entry);
+}
+
+int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
+{
+ struct efa_dev *dev = to_edev(ibcq->device);
+ struct efa_cq *cq = to_ecq(ibcq);
+
+ ibdev_dbg(&dev->ibdev,
+ "Destroy cq[%d] virt[0x%p] freed: size[%lu], dma[%pad]\n",
+ cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr);
+
+ efa_destroy_cq_idx(dev, cq->cq_idx);
+ efa_cq_user_mmap_entries_remove(cq);
+ if (cq->eq) {
+ xa_erase(&dev->cqs_xa, cq->cq_idx);
+ synchronize_irq(cq->eq->irq.irqn);
+ }
+ efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size,
+ DMA_FROM_DEVICE);
+ return 0;
+}
+
+static struct efa_eq *efa_vec2eq(struct efa_dev *dev, int vec)
+{
+ return &dev->eqs[vec];
+}
+
+static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq,
+ struct efa_ibv_create_cq_resp *resp,
+ bool db_valid)
+{
+ resp->q_mmap_size = cq->size;
+ cq->mmap_entry = efa_user_mmap_entry_insert(&cq->ucontext->ibucontext,
+ virt_to_phys(cq->cpu_addr),
+ cq->size, EFA_MMAP_DMA_PAGE,
+ &resp->q_mmap_key);
+ if (!cq->mmap_entry)
+ return -ENOMEM;
+
+ if (db_valid) {
+ cq->db_mmap_entry =
+ efa_user_mmap_entry_insert(&cq->ucontext->ibucontext,
+ dev->db_bar_addr + resp->db_off,
+ PAGE_SIZE, EFA_MMAP_IO_NC,
+ &resp->db_mmap_key);
+ if (!cq->db_mmap_entry) {
+ rdma_user_mmap_entry_remove(cq->mmap_entry);
+ return -ENOMEM;
+ }
+
+ resp->db_off &= ~PAGE_MASK;
+ resp->comp_mask |= EFA_CREATE_CQ_RESP_DB_OFF;
+ }
+
+ return 0;
+}
+
+int efa_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
+ struct ib_udata *udata)
+{
+ struct efa_ucontext *ucontext = rdma_udata_to_drv_context(
+ udata, struct efa_ucontext, ibucontext);
+ struct efa_com_create_cq_params params = {};
+ struct efa_ibv_create_cq_resp resp = {};
+ struct efa_com_create_cq_result result;
+ struct ib_device *ibdev = ibcq->device;
+ struct efa_dev *dev = to_edev(ibdev);
+ struct efa_ibv_create_cq cmd = {};
+ struct efa_cq *cq = to_ecq(ibcq);
+ int entries = attr->cqe;
+ bool set_src_addr;
+ int err;
+
+ ibdev_dbg(ibdev, "create_cq entries %d\n", entries);
+
+ if (attr->flags)
+ return -EOPNOTSUPP;
+
+ if (entries < 1 || entries > dev->dev_attr.max_cq_depth) {
+ ibdev_dbg(ibdev,
+ "cq: requested entries[%u] non-positive or greater than max[%u]\n",
+ entries, dev->dev_attr.max_cq_depth);
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ if (offsetofend(typeof(cmd), num_sub_cqs) > udata->inlen) {
+ ibdev_dbg(ibdev,
+ "Incompatible ABI params, no input udata\n");
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ if (udata->inlen > sizeof(cmd) &&
+ !ib_is_udata_cleared(udata, sizeof(cmd),
+ udata->inlen - sizeof(cmd))) {
+ ibdev_dbg(ibdev,
+ "Incompatible ABI params, unknown fields in udata\n");
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ err = ib_copy_from_udata(&cmd, udata,
+ min(sizeof(cmd), udata->inlen));
+ if (err) {
+ ibdev_dbg(ibdev, "Cannot copy udata for create_cq\n");
+ goto err_out;
+ }
+
+ if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_58)) {
+ ibdev_dbg(ibdev,
+ "Incompatible ABI params, unknown fields in udata\n");
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ set_src_addr = !!(cmd.flags & EFA_CREATE_CQ_WITH_SGID);
+ if ((cmd.cq_entry_size != sizeof(struct efa_io_rx_cdesc_ex)) &&
+ (set_src_addr ||
+ cmd.cq_entry_size != sizeof(struct efa_io_rx_cdesc))) {
+ ibdev_dbg(ibdev,
+ "Invalid entry size [%u]\n", cmd.cq_entry_size);
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ if (cmd.num_sub_cqs != dev->dev_attr.sub_cqs_per_cq) {
+ ibdev_dbg(ibdev,
+ "Invalid number of sub cqs[%u] expected[%u]\n",
+ cmd.num_sub_cqs, dev->dev_attr.sub_cqs_per_cq);
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ cq->ucontext = ucontext;
+ cq->size = PAGE_ALIGN(cmd.cq_entry_size * entries * cmd.num_sub_cqs);
+ cq->cpu_addr = efa_zalloc_mapped(dev, &cq->dma_addr, cq->size,
+ DMA_FROM_DEVICE);
+ if (!cq->cpu_addr) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+
+ params.uarn = cq->ucontext->uarn;
+ params.cq_depth = entries;
+ params.dma_addr = cq->dma_addr;
+ params.entry_size_in_bytes = cmd.cq_entry_size;
+ params.num_sub_cqs = cmd.num_sub_cqs;
+ params.set_src_addr = set_src_addr;
+ if (cmd.flags & EFA_CREATE_CQ_WITH_COMPLETION_CHANNEL) {
+ cq->eq = efa_vec2eq(dev, attr->comp_vector);
+ params.eqn = cq->eq->eeq.eqn;
+ params.interrupt_mode_enabled = true;
+ }
+
+ err = efa_com_create_cq(&dev->edev, &params, &result);
+ if (err)
+ goto err_free_mapped;
+
+ resp.db_off = result.db_off;
+ resp.cq_idx = result.cq_idx;
+ cq->cq_idx = result.cq_idx;
+ cq->ibcq.cqe = result.actual_depth;
+ WARN_ON_ONCE(entries != result.actual_depth);
+
+ err = cq_mmap_entries_setup(dev, cq, &resp, result.db_valid);
+ if (err) {
+ ibdev_dbg(ibdev, "Could not setup cq[%u] mmap entries\n",
+ cq->cq_idx);
+ goto err_destroy_cq;
+ }
+
+ if (cq->eq) {
+ err = xa_err(xa_store(&dev->cqs_xa, cq->cq_idx, cq, GFP_KERNEL));
+ if (err) {
+ ibdev_dbg(ibdev, "Failed to store cq[%u] in xarray\n",
+ cq->cq_idx);
+ goto err_remove_mmap;
+ }
+ }
+
+ if (udata->outlen) {
+ err = ib_copy_to_udata(udata, &resp,
+ min(sizeof(resp), udata->outlen));
+ if (err) {
+ ibdev_dbg(ibdev,
+ "Failed to copy udata for create_cq\n");
+ goto err_xa_erase;
+ }
+ }
+
+ ibdev_dbg(ibdev, "Created cq[%d], cq depth[%u]. dma[%pad] virt[0x%p]\n",
+ cq->cq_idx, result.actual_depth, &cq->dma_addr, cq->cpu_addr);
+
+ return 0;
+
+err_xa_erase:
+ if (cq->eq)
+ xa_erase(&dev->cqs_xa, cq->cq_idx);
+err_remove_mmap:
+ efa_cq_user_mmap_entries_remove(cq);
+err_destroy_cq:
+ efa_destroy_cq_idx(dev, cq->cq_idx);
+err_free_mapped:
+ efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size,
+ DMA_FROM_DEVICE);
+
+err_out:
+ atomic64_inc(&dev->stats.create_cq_err);
+ return err;
+}
+
+static int umem_to_page_list(struct efa_dev *dev,
+ struct ib_umem *umem,
+ u64 *page_list,
+ u32 hp_cnt,
+ u8 hp_shift)
+{
+ u32 pages_in_hp = BIT(hp_shift - PAGE_SHIFT);
+ struct ib_block_iter biter;
+ unsigned int hp_idx = 0;
+
+ ibdev_dbg(&dev->ibdev, "hp_cnt[%u], pages_in_hp[%u]\n",
+ hp_cnt, pages_in_hp);
+
+ rdma_umem_for_each_dma_block(umem, &biter, BIT(hp_shift))
+ page_list[hp_idx++] = rdma_block_iter_dma_address(&biter);
+
+ return 0;
+}
+
+static struct scatterlist *efa_vmalloc_buf_to_sg(u64 *buf, int page_cnt)
+{
+ struct scatterlist *sglist;
+ struct page *pg;
+ int i;
+
+ sglist = kmalloc_array(page_cnt, sizeof(*sglist), GFP_KERNEL);
+ if (!sglist)
+ return NULL;
+ sg_init_table(sglist, page_cnt);
+ for (i = 0; i < page_cnt; i++) {
+ pg = vmalloc_to_page(buf);
+ if (!pg)
+ goto err;
+ sg_set_page(&sglist[i], pg, PAGE_SIZE, 0);
+ buf += PAGE_SIZE / sizeof(*buf);
+ }
+ return sglist;
+
+err:
+ kfree(sglist);
+ return NULL;
+}
+
+/*
+ * create a chunk list of physical pages dma addresses from the supplied
+ * scatter gather list
+ */
+static int pbl_chunk_list_create(struct efa_dev *dev, struct pbl_context *pbl)
+{
+ struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
+ int page_cnt = pbl->phys.indirect.pbl_buf_size_in_pages;
+ struct scatterlist *pages_sgl = pbl->phys.indirect.sgl;
+ unsigned int chunk_list_size, chunk_idx, payload_idx;
+ int sg_dma_cnt = pbl->phys.indirect.sg_dma_cnt;
+ struct efa_com_ctrl_buff_info *ctrl_buf;
+ u64 *cur_chunk_buf, *prev_chunk_buf;
+ struct ib_block_iter biter;
+ dma_addr_t dma_addr;
+ int i;
+
+ /* allocate a chunk list that consists of 4KB chunks */
+ chunk_list_size = DIV_ROUND_UP(page_cnt, EFA_PTRS_PER_CHUNK);
+
+ chunk_list->size = chunk_list_size;
+ chunk_list->chunks = kcalloc(chunk_list_size,
+ sizeof(*chunk_list->chunks),
+ GFP_KERNEL);
+ if (!chunk_list->chunks)
+ return -ENOMEM;
+
+ ibdev_dbg(&dev->ibdev,
+ "chunk_list_size[%u] - pages[%u]\n", chunk_list_size,
+ page_cnt);
+
+ /* allocate chunk buffers: */
+ for (i = 0; i < chunk_list_size; i++) {
+ chunk_list->chunks[i].buf = kzalloc(EFA_CHUNK_SIZE, GFP_KERNEL);
+ if (!chunk_list->chunks[i].buf)
+ goto chunk_list_dealloc;
+
+ chunk_list->chunks[i].length = EFA_CHUNK_USED_SIZE;
+ }
+ chunk_list->chunks[chunk_list_size - 1].length =
+ ((page_cnt % EFA_PTRS_PER_CHUNK) * EFA_CHUNK_PAYLOAD_PTR_SIZE) +
+ EFA_CHUNK_PTR_SIZE;
+
+ /* fill the dma addresses of sg list pages to chunks: */
+ chunk_idx = 0;
+ payload_idx = 0;
+ cur_chunk_buf = chunk_list->chunks[0].buf;
+ rdma_for_each_block(pages_sgl, &biter, sg_dma_cnt,
+ EFA_CHUNK_PAYLOAD_SIZE) {
+ cur_chunk_buf[payload_idx++] =
+ rdma_block_iter_dma_address(&biter);
+
+ if (payload_idx == EFA_PTRS_PER_CHUNK) {
+ chunk_idx++;
+ cur_chunk_buf = chunk_list->chunks[chunk_idx].buf;
+ payload_idx = 0;
+ }
+ }
+
+ /* map chunks to dma and fill chunks next ptrs */
+ for (i = chunk_list_size - 1; i >= 0; i--) {
+ dma_addr = dma_map_single(&dev->pdev->dev,
+ chunk_list->chunks[i].buf,
+ chunk_list->chunks[i].length,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
+ ibdev_err(&dev->ibdev,
+ "chunk[%u] dma_map_failed\n", i);
+ goto chunk_list_unmap;
+ }
+
+ chunk_list->chunks[i].dma_addr = dma_addr;
+ ibdev_dbg(&dev->ibdev,
+ "chunk[%u] mapped at [%pad]\n", i, &dma_addr);
+
+ if (!i)
+ break;
+
+ prev_chunk_buf = chunk_list->chunks[i - 1].buf;
+
+ ctrl_buf = (struct efa_com_ctrl_buff_info *)
+ &prev_chunk_buf[EFA_PTRS_PER_CHUNK];
+ ctrl_buf->length = chunk_list->chunks[i].length;
+
+ efa_com_set_dma_addr(dma_addr,
+ &ctrl_buf->address.mem_addr_high,
+ &ctrl_buf->address.mem_addr_low);
+ }
+
+ return 0;
+
+chunk_list_unmap:
+ for (; i < chunk_list_size; i++) {
+ dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
+ chunk_list->chunks[i].length, DMA_TO_DEVICE);
+ }
+chunk_list_dealloc:
+ for (i = 0; i < chunk_list_size; i++)
+ kfree(chunk_list->chunks[i].buf);
+
+ kfree(chunk_list->chunks);
+ return -ENOMEM;
+}
+
+static void pbl_chunk_list_destroy(struct efa_dev *dev, struct pbl_context *pbl)
+{
+ struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
+ int i;
+
+ for (i = 0; i < chunk_list->size; i++) {
+ dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
+ chunk_list->chunks[i].length, DMA_TO_DEVICE);
+ kfree(chunk_list->chunks[i].buf);
+ }
+
+ kfree(chunk_list->chunks);
+}
+
+/* initialize pbl continuous mode: map pbl buffer to a dma address. */
+static int pbl_continuous_initialize(struct efa_dev *dev,
+ struct pbl_context *pbl)
+{
+ dma_addr_t dma_addr;
+
+ dma_addr = dma_map_single(&dev->pdev->dev, pbl->pbl_buf,
+ pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
+ if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
+ ibdev_err(&dev->ibdev, "Unable to map pbl to DMA address\n");
+ return -ENOMEM;
+ }
+
+ pbl->phys.continuous.dma_addr = dma_addr;
+ ibdev_dbg(&dev->ibdev,
+ "pbl continuous - dma_addr = %pad, size[%u]\n",
+ &dma_addr, pbl->pbl_buf_size_in_bytes);
+
+ return 0;
+}
+
+/*
+ * initialize pbl indirect mode:
+ * create a chunk list out of the dma addresses of the physical pages of
+ * pbl buffer.
+ */
+static int pbl_indirect_initialize(struct efa_dev *dev, struct pbl_context *pbl)
+{
+ u32 size_in_pages = DIV_ROUND_UP(pbl->pbl_buf_size_in_bytes, EFA_CHUNK_PAYLOAD_SIZE);
+ struct scatterlist *sgl;
+ int sg_dma_cnt, err;
+
+ BUILD_BUG_ON(EFA_CHUNK_PAYLOAD_SIZE > PAGE_SIZE);
+ sgl = efa_vmalloc_buf_to_sg(pbl->pbl_buf, size_in_pages);
+ if (!sgl)
+ return -ENOMEM;
+
+ sg_dma_cnt = dma_map_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
+ if (!sg_dma_cnt) {
+ err = -EINVAL;
+ goto err_map;
+ }
+
+ pbl->phys.indirect.pbl_buf_size_in_pages = size_in_pages;
+ pbl->phys.indirect.sgl = sgl;
+ pbl->phys.indirect.sg_dma_cnt = sg_dma_cnt;
+ err = pbl_chunk_list_create(dev, pbl);
+ if (err) {
+ ibdev_dbg(&dev->ibdev,
+ "chunk_list creation failed[%d]\n", err);
+ goto err_chunk;
+ }
+
+ ibdev_dbg(&dev->ibdev,
+ "pbl indirect - size[%u], chunks[%u]\n",
+ pbl->pbl_buf_size_in_bytes,
+ pbl->phys.indirect.chunk_list.size);
+
+ return 0;
+
+err_chunk:
+ dma_unmap_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
+err_map:
+ kfree(sgl);
+ return err;
+}
+
+static void pbl_indirect_terminate(struct efa_dev *dev, struct pbl_context *pbl)
+{
+ pbl_chunk_list_destroy(dev, pbl);
+ dma_unmap_sg(&dev->pdev->dev, pbl->phys.indirect.sgl,
+ pbl->phys.indirect.pbl_buf_size_in_pages, DMA_TO_DEVICE);
+ kfree(pbl->phys.indirect.sgl);
+}
+
+/* create a page buffer list from a mapped user memory region */
+static int pbl_create(struct efa_dev *dev,
+ struct pbl_context *pbl,
+ struct ib_umem *umem,
+ int hp_cnt,
+ u8 hp_shift)
+{
+ int err;
+
+ pbl->pbl_buf_size_in_bytes = hp_cnt * EFA_CHUNK_PAYLOAD_PTR_SIZE;
+ pbl->pbl_buf = kvzalloc(pbl->pbl_buf_size_in_bytes, GFP_KERNEL);
+ if (!pbl->pbl_buf)
+ return -ENOMEM;
+
+ if (is_vmalloc_addr(pbl->pbl_buf)) {
+ pbl->physically_continuous = 0;
+ err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
+ hp_shift);
+ if (err)
+ goto err_free;
+
+ err = pbl_indirect_initialize(dev, pbl);
+ if (err)
+ goto err_free;
+ } else {
+ pbl->physically_continuous = 1;
+ err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
+ hp_shift);
+ if (err)
+ goto err_free;
+
+ err = pbl_continuous_initialize(dev, pbl);
+ if (err)
+ goto err_free;
+ }
+
+ ibdev_dbg(&dev->ibdev,
+ "user_pbl_created: user_pages[%u], continuous[%u]\n",
+ hp_cnt, pbl->physically_continuous);
+
+ return 0;
+
+err_free:
+ kvfree(pbl->pbl_buf);
+ return err;
+}
+
+static void pbl_destroy(struct efa_dev *dev, struct pbl_context *pbl)
+{
+ if (pbl->physically_continuous)
+ dma_unmap_single(&dev->pdev->dev, pbl->phys.continuous.dma_addr,
+ pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
+ else
+ pbl_indirect_terminate(dev, pbl);
+
+ kvfree(pbl->pbl_buf);
+}
+
+static int efa_create_inline_pbl(struct efa_dev *dev, struct efa_mr *mr,
+ struct efa_com_reg_mr_params *params)
+{
+ int err;
+
+ params->inline_pbl = 1;
+ err = umem_to_page_list(dev, mr->umem, params->pbl.inline_pbl_array,
+ params->page_num, params->page_shift);
+ if (err)
+ return err;
+
+ ibdev_dbg(&dev->ibdev,
+ "inline_pbl_array - pages[%u]\n", params->page_num);
+
+ return 0;
+}
+
+static int efa_create_pbl(struct efa_dev *dev,
+ struct pbl_context *pbl,
+ struct efa_mr *mr,
+ struct efa_com_reg_mr_params *params)
+{
+ int err;
+
+ err = pbl_create(dev, pbl, mr->umem, params->page_num,
+ params->page_shift);
+ if (err) {
+ ibdev_dbg(&dev->ibdev, "Failed to create pbl[%d]\n", err);
+ return err;
+ }
+
+ params->inline_pbl = 0;
+ params->indirect = !pbl->physically_continuous;
+ if (pbl->physically_continuous) {
+ params->pbl.pbl.length = pbl->pbl_buf_size_in_bytes;
+
+ efa_com_set_dma_addr(pbl->phys.continuous.dma_addr,
+ &params->pbl.pbl.address.mem_addr_high,
+ &params->pbl.pbl.address.mem_addr_low);
+ } else {
+ params->pbl.pbl.length =
+ pbl->phys.indirect.chunk_list.chunks[0].length;
+
+ efa_com_set_dma_addr(pbl->phys.indirect.chunk_list.chunks[0].dma_addr,
+ &params->pbl.pbl.address.mem_addr_high,
+ &params->pbl.pbl.address.mem_addr_low);
+ }
+
+ return 0;
+}
+
+static struct efa_mr *efa_alloc_mr(struct ib_pd *ibpd, int access_flags,
+ struct ib_udata *udata)
+{
+ struct efa_dev *dev = to_edev(ibpd->device);
+ int supp_access_flags;
+ struct efa_mr *mr;
+
+ if (udata && udata->inlen &&
+ !ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) {
+ ibdev_dbg(&dev->ibdev,
+ "Incompatible ABI params, udata not cleared\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ supp_access_flags =
+ IB_ACCESS_LOCAL_WRITE |
+ (EFA_DEV_CAP(dev, RDMA_READ) ? IB_ACCESS_REMOTE_READ : 0);
+
+ access_flags &= ~IB_ACCESS_OPTIONAL;
+ if (access_flags & ~supp_access_flags) {
+ ibdev_dbg(&dev->ibdev,
+ "Unsupported access flags[%#x], supported[%#x]\n",
+ access_flags, supp_access_flags);
+ return ERR_PTR(-EOPNOTSUPP);
+ }
+
+ mr = kzalloc(sizeof(*mr), GFP_KERNEL);
+ if (!mr)
+ return ERR_PTR(-ENOMEM);
+
+ return mr;
+}
+
+static int efa_register_mr(struct ib_pd *ibpd, struct efa_mr *mr, u64 start,
+ u64 length, u64 virt_addr, int access_flags)
+{
+ struct efa_dev *dev = to_edev(ibpd->device);
+ struct efa_com_reg_mr_params params = {};
+ struct efa_com_reg_mr_result result = {};
+ struct pbl_context pbl;
+ unsigned int pg_sz;
+ int inline_size;
+ int err;
+
+ params.pd = to_epd(ibpd)->pdn;
+ params.iova = virt_addr;
+ params.mr_length_in_bytes = length;
+ params.permissions = access_flags;
+
+ pg_sz = ib_umem_find_best_pgsz(mr->umem,
+ dev->dev_attr.page_size_cap,
+ virt_addr);
+ if (!pg_sz) {
+ ibdev_dbg(&dev->ibdev, "Failed to find a suitable page size in page_size_cap %#llx\n",
+ dev->dev_attr.page_size_cap);
+ return -EOPNOTSUPP;
+ }
+
+ params.page_shift = order_base_2(pg_sz);
+ params.page_num = ib_umem_num_dma_blocks(mr->umem, pg_sz);
+
+ ibdev_dbg(&dev->ibdev,
+ "start %#llx length %#llx params.page_shift %u params.page_num %u\n",
+ start, length, params.page_shift, params.page_num);
+
+ inline_size = ARRAY_SIZE(params.pbl.inline_pbl_array);
+ if (params.page_num <= inline_size) {
+ err = efa_create_inline_pbl(dev, mr, &params);
+ if (err)
+ return err;
+
+ err = efa_com_register_mr(&dev->edev, &params, &result);
+ if (err)
+ return err;
+ } else {
+ err = efa_create_pbl(dev, &pbl, mr, &params);
+ if (err)
+ return err;
+
+ err = efa_com_register_mr(&dev->edev, &params, &result);
+ pbl_destroy(dev, &pbl);
+
+ if (err)
+ return err;
+ }
+
+ mr->ibmr.lkey = result.l_key;
+ mr->ibmr.rkey = result.r_key;
+ mr->ibmr.length = length;
+ ibdev_dbg(&dev->ibdev, "Registered mr[%d]\n", mr->ibmr.lkey);
+
+ return 0;
+}
+
+struct ib_mr *efa_reg_user_mr_dmabuf(struct ib_pd *ibpd, u64 start,
+ u64 length, u64 virt_addr,
+ int fd, int access_flags,
+ struct ib_udata *udata)
+{
+ struct efa_dev *dev = to_edev(ibpd->device);
+ struct ib_umem_dmabuf *umem_dmabuf;
+ struct efa_mr *mr;
+ int err;
+
+ mr = efa_alloc_mr(ibpd, access_flags, udata);
+ if (IS_ERR(mr)) {
+ err = PTR_ERR(mr);
+ goto err_out;
+ }
+
+ umem_dmabuf = ib_umem_dmabuf_get_pinned(ibpd->device, start, length, fd,
+ access_flags);
+ if (IS_ERR(umem_dmabuf)) {
+ err = PTR_ERR(umem_dmabuf);
+ ibdev_dbg(&dev->ibdev, "Failed to get dmabuf umem[%d]\n", err);
+ goto err_free;
+ }
+
+ mr->umem = &umem_dmabuf->umem;
+ err = efa_register_mr(ibpd, mr, start, length, virt_addr, access_flags);
+ if (err)
+ goto err_release;
+
+ return &mr->ibmr;
+
+err_release:
+ ib_umem_release(mr->umem);
+err_free:
+ kfree(mr);
+err_out:
+ atomic64_inc(&dev->stats.reg_mr_err);
+ return ERR_PTR(err);
+}
+
+struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,
+ u64 virt_addr, int access_flags,
+ struct ib_udata *udata)
+{
+ struct efa_dev *dev = to_edev(ibpd->device);
+ struct efa_mr *mr;
+ int err;
+
+ mr = efa_alloc_mr(ibpd, access_flags, udata);
+ if (IS_ERR(mr)) {
+ err = PTR_ERR(mr);
+ goto err_out;
+ }
+
+ mr->umem = ib_umem_get(ibpd->device, start, length, access_flags);
+ if (IS_ERR(mr->umem)) {
+ err = PTR_ERR(mr->umem);
+ ibdev_dbg(&dev->ibdev,
+ "Failed to pin and map user space memory[%d]\n", err);
+ goto err_free;
+ }
+
+ err = efa_register_mr(ibpd, mr, start, length, virt_addr, access_flags);
+ if (err)
+ goto err_release;
+
+ return &mr->ibmr;
+
+err_release:
+ ib_umem_release(mr->umem);
+err_free:
+ kfree(mr);
+err_out:
+ atomic64_inc(&dev->stats.reg_mr_err);
+ return ERR_PTR(err);
+}
+
+int efa_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
+{
+ struct efa_dev *dev = to_edev(ibmr->device);
+ struct efa_com_dereg_mr_params params;
+ struct efa_mr *mr = to_emr(ibmr);
+ int err;
+
+ ibdev_dbg(&dev->ibdev, "Deregister mr[%d]\n", ibmr->lkey);
+
+ params.l_key = mr->ibmr.lkey;
+ err = efa_com_dereg_mr(&dev->edev, &params);
+ if (err)
+ return err;
+
+ ib_umem_release(mr->umem);
+ kfree(mr);
+
+ return 0;
+}
+
+int efa_get_port_immutable(struct ib_device *ibdev, u32 port_num,
+ struct ib_port_immutable *immutable)
+{
+ struct ib_port_attr attr;
+ int err;
+
+ err = ib_query_port(ibdev, port_num, &attr);
+ if (err) {
+ ibdev_dbg(ibdev, "Couldn't query port err[%d]\n", err);
+ return err;
+ }
+
+ immutable->pkey_tbl_len = attr.pkey_tbl_len;
+ immutable->gid_tbl_len = attr.gid_tbl_len;
+
+ return 0;
+}
+
+static int efa_dealloc_uar(struct efa_dev *dev, u16 uarn)
+{
+ struct efa_com_dealloc_uar_params params = {
+ .uarn = uarn,
+ };
+
+ return efa_com_dealloc_uar(&dev->edev, &params);
+}
+
+#define EFA_CHECK_USER_COMP(_dev, _comp_mask, _attr, _mask, _attr_str) \
+ (_attr_str = (!(_dev)->dev_attr._attr || ((_comp_mask) & (_mask))) ? \
+ NULL : #_attr)
+
+static int efa_user_comp_handshake(const struct ib_ucontext *ibucontext,
+ const struct efa_ibv_alloc_ucontext_cmd *cmd)
+{
+ struct efa_dev *dev = to_edev(ibucontext->device);
+ char *attr_str;
+
+ if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, max_tx_batch,
+ EFA_ALLOC_UCONTEXT_CMD_COMP_TX_BATCH, attr_str))
+ goto err;
+
+ if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, min_sq_depth,
+ EFA_ALLOC_UCONTEXT_CMD_COMP_MIN_SQ_WR,
+ attr_str))
+ goto err;
+
+ return 0;
+
+err:
+ ibdev_dbg(&dev->ibdev, "Userspace handshake failed for %s attribute\n",
+ attr_str);
+ return -EOPNOTSUPP;
+}
+
+int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata)
+{
+ struct efa_ucontext *ucontext = to_eucontext(ibucontext);
+ struct efa_dev *dev = to_edev(ibucontext->device);
+ struct efa_ibv_alloc_ucontext_resp resp = {};
+ struct efa_ibv_alloc_ucontext_cmd cmd = {};
+ struct efa_com_alloc_uar_result result;
+ int err;
+
+ /*
+ * it's fine if the driver does not know all request fields,
+ * we will ack input fields in our response.
+ */
+
+ err = ib_copy_from_udata(&cmd, udata,
+ min(sizeof(cmd), udata->inlen));
+ if (err) {
+ ibdev_dbg(&dev->ibdev,
+ "Cannot copy udata for alloc_ucontext\n");
+ goto err_out;
+ }
+
+ err = efa_user_comp_handshake(ibucontext, &cmd);
+ if (err)
+ goto err_out;
+
+ err = efa_com_alloc_uar(&dev->edev, &result);
+ if (err)
+ goto err_out;
+
+ ucontext->uarn = result.uarn;
+
+ resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE;
+ resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_CREATE_AH;
+ resp.sub_cqs_per_cq = dev->dev_attr.sub_cqs_per_cq;
+ resp.inline_buf_size = dev->dev_attr.inline_buf_size;
+ resp.max_llq_size = dev->dev_attr.max_llq_size;
+ resp.max_tx_batch = dev->dev_attr.max_tx_batch;
+ resp.min_sq_wr = dev->dev_attr.min_sq_depth;
+
+ err = ib_copy_to_udata(udata, &resp,
+ min(sizeof(resp), udata->outlen));
+ if (err)
+ goto err_dealloc_uar;
+
+ return 0;
+
+err_dealloc_uar:
+ efa_dealloc_uar(dev, result.uarn);
+err_out:
+ atomic64_inc(&dev->stats.alloc_ucontext_err);
+ return err;
+}
+
+void efa_dealloc_ucontext(struct ib_ucontext *ibucontext)
+{
+ struct efa_ucontext *ucontext = to_eucontext(ibucontext);
+ struct efa_dev *dev = to_edev(ibucontext->device);
+
+ efa_dealloc_uar(dev, ucontext->uarn);
+}
+
+void efa_mmap_free(struct rdma_user_mmap_entry *rdma_entry)
+{
+ struct efa_user_mmap_entry *entry = to_emmap(rdma_entry);
+
+ kfree(entry);
+}
+
+static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext,
+ struct vm_area_struct *vma)
+{
+ struct rdma_user_mmap_entry *rdma_entry;
+ struct efa_user_mmap_entry *entry;
+ unsigned long va;
+ int err = 0;
+ u64 pfn;
+
+ rdma_entry = rdma_user_mmap_entry_get(&ucontext->ibucontext, vma);
+ if (!rdma_entry) {
+ ibdev_dbg(&dev->ibdev,
+ "pgoff[%#lx] does not have valid entry\n",
+ vma->vm_pgoff);
+ atomic64_inc(&dev->stats.mmap_err);
+ return -EINVAL;
+ }
+ entry = to_emmap(rdma_entry);
+
+ ibdev_dbg(&dev->ibdev,
+ "Mapping address[%#llx], length[%#zx], mmap_flag[%d]\n",
+ entry->address, rdma_entry->npages * PAGE_SIZE,
+ entry->mmap_flag);
+
+ pfn = entry->address >> PAGE_SHIFT;
+ switch (entry->mmap_flag) {
+ case EFA_MMAP_IO_NC:
+ err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,
+ entry->rdma_entry.npages * PAGE_SIZE,
+ pgprot_noncached(vma->vm_page_prot),
+ rdma_entry);
+ break;
+ case EFA_MMAP_IO_WC:
+ err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,
+ entry->rdma_entry.npages * PAGE_SIZE,
+ pgprot_writecombine(vma->vm_page_prot),
+ rdma_entry);
+ break;
+ case EFA_MMAP_DMA_PAGE:
+ for (va = vma->vm_start; va < vma->vm_end;
+ va += PAGE_SIZE, pfn++) {
+ err = vm_insert_page(vma, va, pfn_to_page(pfn));
+ if (err)
+ break;
+ }
+ break;
+ default:
+ err = -EINVAL;
+ }
+
+ if (err) {
+ ibdev_dbg(
+ &dev->ibdev,
+ "Couldn't mmap address[%#llx] length[%#zx] mmap_flag[%d] err[%d]\n",
+ entry->address, rdma_entry->npages * PAGE_SIZE,
+ entry->mmap_flag, err);
+ atomic64_inc(&dev->stats.mmap_err);
+ }
+
+ rdma_user_mmap_entry_put(rdma_entry);
+ return err;
+}
+
+int efa_mmap(struct ib_ucontext *ibucontext,
+ struct vm_area_struct *vma)
+{
+ struct efa_ucontext *ucontext = to_eucontext(ibucontext);
+ struct efa_dev *dev = to_edev(ibucontext->device);
+ size_t length = vma->vm_end - vma->vm_start;
+
+ ibdev_dbg(&dev->ibdev,
+ "start %#lx, end %#lx, length = %#zx, pgoff = %#lx\n",
+ vma->vm_start, vma->vm_end, length, vma->vm_pgoff);
+
+ return __efa_mmap(dev, ucontext, vma);
+}
+
+static int efa_ah_destroy(struct efa_dev *dev, struct efa_ah *ah)
+{
+ struct efa_com_destroy_ah_params params = {
+ .ah = ah->ah,
+ .pdn = to_epd(ah->ibah.pd)->pdn,
+ };
+
+ return efa_com_destroy_ah(&dev->edev, &params);
+}
+
+int efa_create_ah(struct ib_ah *ibah,
+ struct rdma_ah_init_attr *init_attr,
+ struct ib_udata *udata)
+{
+ struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
+ struct efa_dev *dev = to_edev(ibah->device);
+ struct efa_com_create_ah_params params = {};
+ struct efa_ibv_create_ah_resp resp = {};
+ struct efa_com_create_ah_result result;
+ struct efa_ah *ah = to_eah(ibah);
+ int err;
+
+ if (!(init_attr->flags & RDMA_CREATE_AH_SLEEPABLE)) {
+ ibdev_dbg(&dev->ibdev,
+ "Create address handle is not supported in atomic context\n");
+ err = -EOPNOTSUPP;
+ goto err_out;
+ }
+
+ if (udata->inlen &&
+ !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+ ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ memcpy(params.dest_addr, ah_attr->grh.dgid.raw,
+ sizeof(params.dest_addr));
+ params.pdn = to_epd(ibah->pd)->pdn;
+ err = efa_com_create_ah(&dev->edev, &params, &result);
+ if (err)
+ goto err_out;
+
+ memcpy(ah->id, ah_attr->grh.dgid.raw, sizeof(ah->id));
+ ah->ah = result.ah;
+
+ resp.efa_address_handle = result.ah;
+
+ if (udata->outlen) {
+ err = ib_copy_to_udata(udata, &resp,
+ min(sizeof(resp), udata->outlen));
+ if (err) {
+ ibdev_dbg(&dev->ibdev,
+ "Failed to copy udata for create_ah response\n");
+ goto err_destroy_ah;
+ }
+ }
+ ibdev_dbg(&dev->ibdev, "Created ah[%d]\n", ah->ah);
+
+ return 0;
+
+err_destroy_ah:
+ efa_ah_destroy(dev, ah);
+err_out:
+ atomic64_inc(&dev->stats.create_ah_err);
+ return err;
+}
+
+int efa_destroy_ah(struct ib_ah *ibah, u32 flags)
+{
+ struct efa_dev *dev = to_edev(ibah->pd->device);
+ struct efa_ah *ah = to_eah(ibah);
+
+ ibdev_dbg(&dev->ibdev, "Destroy ah[%d]\n", ah->ah);
+
+ if (!(flags & RDMA_DESTROY_AH_SLEEPABLE)) {
+ ibdev_dbg(&dev->ibdev,
+ "Destroy address handle is not supported in atomic context\n");
+ return -EOPNOTSUPP;
+ }
+
+ efa_ah_destroy(dev, ah);
+ return 0;
+}
+
+struct rdma_hw_stats *efa_alloc_hw_port_stats(struct ib_device *ibdev,
+ u32 port_num)
+{
+ return rdma_alloc_hw_stats_struct(efa_port_stats_descs,
+ ARRAY_SIZE(efa_port_stats_descs),
+ RDMA_HW_STATS_DEFAULT_LIFESPAN);
+}
+
+struct rdma_hw_stats *efa_alloc_hw_device_stats(struct ib_device *ibdev)
+{
+ return rdma_alloc_hw_stats_struct(efa_device_stats_descs,
+ ARRAY_SIZE(efa_device_stats_descs),
+ RDMA_HW_STATS_DEFAULT_LIFESPAN);
+}
+
+static int efa_fill_device_stats(struct efa_dev *dev,
+ struct rdma_hw_stats *stats)
+{
+ struct efa_com_stats_admin *as = &dev->edev.aq.stats;
+ struct efa_stats *s = &dev->stats;
+
+ stats->value[EFA_SUBMITTED_CMDS] = atomic64_read(&as->submitted_cmd);
+ stats->value[EFA_COMPLETED_CMDS] = atomic64_read(&as->completed_cmd);
+ stats->value[EFA_CMDS_ERR] = atomic64_read(&as->cmd_err);
+ stats->value[EFA_NO_COMPLETION_CMDS] = atomic64_read(&as->no_completion);
+
+ stats->value[EFA_KEEP_ALIVE_RCVD] = atomic64_read(&s->keep_alive_rcvd);
+ stats->value[EFA_ALLOC_PD_ERR] = atomic64_read(&s->alloc_pd_err);
+ stats->value[EFA_CREATE_QP_ERR] = atomic64_read(&s->create_qp_err);
+ stats->value[EFA_CREATE_CQ_ERR] = atomic64_read(&s->create_cq_err);
+ stats->value[EFA_REG_MR_ERR] = atomic64_read(&s->reg_mr_err);
+ stats->value[EFA_ALLOC_UCONTEXT_ERR] =
+ atomic64_read(&s->alloc_ucontext_err);
+ stats->value[EFA_CREATE_AH_ERR] = atomic64_read(&s->create_ah_err);
+ stats->value[EFA_MMAP_ERR] = atomic64_read(&s->mmap_err);
+
+ return ARRAY_SIZE(efa_device_stats_descs);
+}
+
+static int efa_fill_port_stats(struct efa_dev *dev, struct rdma_hw_stats *stats,
+ u32 port_num)
+{
+ struct efa_com_get_stats_params params = {};
+ union efa_com_get_stats_result result;
+ struct efa_com_rdma_read_stats *rrs;
+ struct efa_com_messages_stats *ms;
+ struct efa_com_basic_stats *bs;
+ int err;
+
+ params.scope = EFA_ADMIN_GET_STATS_SCOPE_ALL;
+ params.type = EFA_ADMIN_GET_STATS_TYPE_BASIC;
+
+ err = efa_com_get_stats(&dev->edev, &params, &result);
+ if (err)
+ return err;
+
+ bs = &result.basic_stats;
+ stats->value[EFA_TX_BYTES] = bs->tx_bytes;
+ stats->value[EFA_TX_PKTS] = bs->tx_pkts;
+ stats->value[EFA_RX_BYTES] = bs->rx_bytes;
+ stats->value[EFA_RX_PKTS] = bs->rx_pkts;
+ stats->value[EFA_RX_DROPS] = bs->rx_drops;
+
+ params.type = EFA_ADMIN_GET_STATS_TYPE_MESSAGES;
+ err = efa_com_get_stats(&dev->edev, &params, &result);
+ if (err)
+ return err;
+
+ ms = &result.messages_stats;
+ stats->value[EFA_SEND_BYTES] = ms->send_bytes;
+ stats->value[EFA_SEND_WRS] = ms->send_wrs;
+ stats->value[EFA_RECV_BYTES] = ms->recv_bytes;
+ stats->value[EFA_RECV_WRS] = ms->recv_wrs;
+
+ params.type = EFA_ADMIN_GET_STATS_TYPE_RDMA_READ;
+ err = efa_com_get_stats(&dev->edev, &params, &result);
+ if (err)
+ return err;
+
+ rrs = &result.rdma_read_stats;
+ stats->value[EFA_RDMA_READ_WRS] = rrs->read_wrs;
+ stats->value[EFA_RDMA_READ_BYTES] = rrs->read_bytes;
+ stats->value[EFA_RDMA_READ_WR_ERR] = rrs->read_wr_err;
+ stats->value[EFA_RDMA_READ_RESP_BYTES] = rrs->read_resp_bytes;
+
+ return ARRAY_SIZE(efa_port_stats_descs);
+}
+
+int efa_get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats,
+ u32 port_num, int index)
+{
+ if (port_num)
+ return efa_fill_port_stats(to_edev(ibdev), stats, port_num);
+ else
+ return efa_fill_device_stats(to_edev(ibdev), stats);
+}
+
+enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev,
+ u32 port_num)
+{
+ return IB_LINK_LAYER_UNSPECIFIED;
+}
+