Add a file that implements the EFA verbs.
Signed-off-by: Gal Pressman <galpress@xxxxxxxxxx>
---
drivers/infiniband/hw/efa/efa_verbs.c | 1827 +++++++++++++++++++++++++++++++++
1 file changed, 1827 insertions(+)
create mode 100644 drivers/infiniband/hw/efa/efa_verbs.c
diff --git a/drivers/infiniband/hw/efa/efa_verbs.c b/drivers/infiniband/hw/efa/efa_verbs.c
new file mode 100644
index 000000000000..ec887648060e
--- /dev/null
+++ b/drivers/infiniband/hw/efa/efa_verbs.c
@@ -0,0 +1,1827 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * Copyright 2018 Amazon.com, Inc. or its affiliates.
+ */
+
+#include <linux/vmalloc.h>
+
+#include <rdma/efa-abi.h>
+#include <rdma/ib_addr.h>
+#include <rdma/ib_umem.h>
+#include <rdma/ib_user_verbs.h>
+#include <rdma/ib_verbs.h>
+
+#include "efa.h"
+
+#define EFA_MMAP_DB_BAR_MEMORY_FLAG BIT(61)
+#define EFA_MMAP_REG_BAR_MEMORY_FLAG BIT(62)
+#define EFA_MMAP_MEM_BAR_MEMORY_FLAG BIT(63)
+#define EFA_MMAP_BARS_MEMORY_MASK \
+ (EFA_MMAP_REG_BAR_MEMORY_FLAG | EFA_MMAP_MEM_BAR_MEMORY_FLAG | \
+ EFA_MMAP_DB_BAR_MEMORY_FLAG)
+
+struct efa_ucontext {
+ struct ib_ucontext ibucontext;
+ /* Protects ucontext state */
+ struct mutex lock;
+ struct list_head link;
+ struct list_head pending_mmaps;
+ u64 mmap_key;
+};
+
+#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_pd {
+ struct ib_pd ibpd;
+ u32 pdn;
+};
+
+struct efa_mr {
+ struct ib_mr ibmr;
+ struct ib_umem *umem;
+ u64 vaddr;
+};
+
+struct efa_cq {
+ struct ib_cq ibcq;
+ struct efa_ucontext *ucontext;
+ u16 cq_idx;
+ dma_addr_t dma_addr;
+ void *cpu_addr;
+ size_t size;
+};
+
+struct efa_qp {
+ struct ib_qp ibqp;
+ enum ib_qp_state state;
+ u32 qp_handle;
+ dma_addr_t rq_dma_addr;
+ void *rq_cpu_addr;
+ size_t rq_size;
+};
+
+struct efa_ah {
+ struct ib_ah ibah;
+ /* dest_addr */
+ u8 id[EFA_GID_SIZE];
+};
+
+struct efa_ah_id {
+ struct list_head list;
+ /* dest_addr */
+ u8 id[EFA_GID_SIZE];
+ u16 address_handle;
+ unsigned int ref_count;
+};
+
+struct efa_mmap_entry {
+ struct list_head list;
+ void *obj;
+ u64 address;
+ u64 length;
+ u64 key;
+};
+
+static void mmap_entry_insert(struct efa_ucontext *ucontext,
+ struct efa_mmap_entry *entry,
+ u64 mem_flag);
+
+static void mmap_obj_entries_remove(struct efa_ucontext *ucontext,
+ void *obj);
+
+#define EFA_PAGE_SHIFT 12
+#define EFA_PAGE_SIZE BIT(EFA_PAGE_SHIFT)
+#define EFA_PAGE_PTR_SIZE 8
+
+#define EFA_CHUNK_ALLOC_SIZE BIT(EFA_PAGE_SHIFT)
+#define EFA_CHUNK_PTR_SIZE sizeof(struct efa_com_ctrl_buff_info)
+
+#define EFA_PAGE_PTRS_PER_CHUNK \
+ ((EFA_CHUNK_ALLOC_SIZE - EFA_CHUNK_PTR_SIZE) / EFA_PAGE_PTR_SIZE)
+
+#define EFA_CHUNK_USED_SIZE \
+ ((EFA_PAGE_PTRS_PER_CHUNK * EFA_PAGE_PTR_SIZE) + EFA_CHUNK_PTR_SIZE)
+
+#define EFA_SUPPORTED_ACCESS_FLAGS IB_ACCESS_LOCAL_WRITE
+
+struct pbl_chunk {
+ u64 *buf;
+ u32 length;
+ dma_addr_t dma_addr;
+};
+
+struct pbl_chunk_list {
+ unsigned int size;
+ struct pbl_chunk *chunks;
+};
+
+struct pbl_context {
+ u64 *pbl_buf;
+ u32 pbl_buf_size_in_bytes;
+ bool physically_continuous;
+ 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;
+
+ struct efa_dev *dev;
+ struct device *dmadev;
+};
+
+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);
+}
+
+#define field_avail(x, fld, sz) (offsetof(typeof(x), fld) + \
+ sizeof(((typeof(x) *)0)->fld) <= (sz))
+
+#define EFA_IS_RESERVED_CLEARED(reserved) \
+ !memchr_inv(reserved, 0, sizeof(reserved))
+
+int efa_query_device(struct ib_device *ibdev,
+ struct ib_device_attr *props,
+ struct ib_udata *udata)
+{
+ struct efa_ibv_ex_query_device_resp resp = {};
+ struct efa_com_get_device_attr_result result;
+ struct efa_dev *dev = to_edev(ibdev);
+ int err;
+
+ pr_debug("--->\n");
+ memset(props, 0, sizeof(*props));
+
+ if (udata && udata->inlen &&
+ !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+ pr_err_ratelimited("Incompatible ABI params, udata not cleared\n");
+ return -EINVAL;
+ }
+
+ err = efa_get_device_attributes(dev, &result);
+ if (err) {
+ pr_err("failed to get device_attr err[%d]!\n", err);
+ return err;
+ }
+
+ props->max_mr_size = result.max_mr_pages * PAGE_SIZE;
+ props->page_size_cap = result.page_size_cap;
+ props->vendor_id = result.vendor_id;
+ props->vendor_part_id = result.vendor_part_id;
+ props->hw_ver = dev->pdev->subsystem_device;
+ props->max_qp = result.max_sq;
+ props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
+ IB_DEVICE_VIRTUAL_FUNCTION |
+ IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
+ props->max_cq = result.max_cq;
+ props->max_pd = result.max_pd;
+ props->max_mr = result.max_mr;
+ props->max_ah = result.max_ah;
+ props->max_cqe = result.max_cq_depth;
+ props->max_qp_wr = min_t(u16, result.max_sq_depth,
+ result.max_rq_depth);
+ props->max_send_sge = result.max_sq_sge;
+ props->max_recv_sge = result.max_rq_sge;
+
+ if (udata && udata->outlen) {
+ resp.sub_cqs_per_cq = result.sub_cqs_per_cq;
+ resp.max_sq_sge = result.max_sq_sge;
+ resp.max_rq_sge = result.max_rq_sge;
+ resp.max_sq_wr = result.max_sq_depth;
+ resp.max_rq_wr = result.max_rq_depth;
+ resp.max_inline_data = result.inline_buf_size;
+
+ err = ib_copy_to_udata(udata, &resp,
+ min(sizeof(resp), udata->outlen));
+ if (err) {
+ pr_err_ratelimited("failed to copy udata for query_device.\n");
+ return err;
+ }
+ }
+
+ return err;
+}
+
+int efa_query_port(struct ib_device *ibdev, u8 port,
+ struct ib_port_attr *props)
+{
+ struct efa_dev *dev = to_edev(ibdev);
+
+ pr_debug("--->\n");
+
+ mutex_lock(&dev->efa_dev_lock);
+ memset(props, 0, sizeof(*props));
+
+ props->lid = 0;
+ props->lmc = 1;
+ props->sm_lid = 0;
+ props->sm_sl = 0;
+
+ props->state = IB_PORT_ACTIVE;
+ props->phys_state = 5;
+ props->port_cap_flags = 0;
+ props->gid_tbl_len = 1;
+ props->pkey_tbl_len = 1;
+ props->bad_pkey_cntr = 0;
+ props->qkey_viol_cntr = 0;
+ props->active_speed = IB_SPEED_EDR;
+ props->active_width = IB_WIDTH_4X;
+ props->max_mtu = ib_mtu_int_to_enum(dev->mtu);
+ props->active_mtu = ib_mtu_int_to_enum(dev->mtu);
+ props->max_msg_sz = dev->mtu;
+ props->max_vl_num = 1;
+ mutex_unlock(&dev->efa_dev_lock);
+ 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_qp *qp = to_eqp(ibqp);
+
+ pr_debug("--->\n");
+
+ memset(qp_attr, 0, sizeof(*qp_attr));
+ memset(qp_init_attr, 0, sizeof(*qp_init_attr));
+
+ qp_attr->qp_state = qp->state;
+ qp_attr->cur_qp_state = qp->state;
+ qp_attr->port_num = 1;
+
+ qp_init_attr->qp_type = ibqp->qp_type;
+ qp_init_attr->recv_cq = ibqp->recv_cq;
+ qp_init_attr->send_cq = ibqp->send_cq;
+
+ return 0;
+}
+
+int efa_query_gid(struct ib_device *ibdev, u8 port, int index,
+ union ib_gid *gid)
+{
+ struct efa_dev *dev = to_edev(ibdev);
+
+ pr_debug("port %d gid index %d\n", port, index);
+
+ if (index > 1)
+ return -EINVAL;
+
+ mutex_lock(&dev->efa_dev_lock);
+ memcpy(gid->raw, dev->addr, sizeof(dev->addr));
+ mutex_unlock(&dev->efa_dev_lock);
+
+ return 0;
+}
+
+int efa_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
+ u16 *pkey)
+{
+ pr_debug("--->\n");
+ if (index > 1)
+ return -EINVAL;
+
+ *pkey = 0xffff;
+ return 0;
+}
+
+struct ib_pd *efa_alloc_pd(struct ib_device *ibdev,
+ struct ib_ucontext *ibucontext,
+ struct ib_udata *udata)
+{
+ struct efa_ibv_alloc_pd_resp resp = {};
+ struct efa_dev *dev = to_edev(ibdev);
+ struct efa_pd *pd;
+ int err;
+
+ pr_debug("--->\n");
+
+ if (!ibucontext) {
+ pr_err("ibucontext is not valid\n");
+ return ERR_PTR(-EOPNOTSUPP);
+ }
+
+ if (udata && udata->inlen &&
+ !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+ pr_err_ratelimited("Incompatible ABI params, udata not cleared\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ pd = kzalloc(sizeof(*pd), GFP_KERNEL);
+ if (!pd) {
+ dev->stats.sw_stats.alloc_pd_alloc_err++;
+ return ERR_PTR(-ENOMEM);
+ }
+
+ pd->pdn = efa_bitmap_alloc(&dev->pd_bitmap);
+ if (pd->pdn == EFA_BITMAP_INVAL) {
+ pr_err("Failed to alloc PD (max_pd %u)\n", dev->caps.max_pd);
+ dev->stats.sw_stats.alloc_pd_bitmap_full_err++;
+ kfree(pd);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ resp.pdn = pd->pdn;
+
+ if (udata && udata->outlen) {
+ err = ib_copy_to_udata(udata, &resp,
+ min(sizeof(resp), udata->outlen));
+ if (err) {
+ pr_err_ratelimited("failed to copy udata for alloc_pd\n");
+ efa_bitmap_free(&dev->pd_bitmap, pd->pdn);
+ kfree(pd);
+ return ERR_PTR(err);
+ }
+ }
+
+ pr_debug("Allocated pd[%d]\n", pd->pdn);
+
+ return &pd->ibpd;
+}
+
+int efa_dealloc_pd(struct ib_pd *ibpd)
+{
+ struct efa_dev *dev = to_edev(ibpd->device);
+ struct efa_pd *pd = to_epd(ibpd);
+
+ pr_debug("Dealloc pd[%d]\n", pd->pdn);
+ efa_bitmap_free(&dev->pd_bitmap, pd->pdn);
+ kfree(pd);
+
+ return 0;
+}
+
+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, ¶ms);
+}
+
+int efa_destroy_qp(struct ib_qp *ibqp)
+{
+ struct efa_dev *dev = to_edev(ibqp->pd->device);
+ struct efa_qp *qp = to_eqp(ibqp);
+ struct efa_ucontext *ucontext;
+
+ pr_debug("Destroy qp[%u]\n", ibqp->qp_num);
+ ucontext = ibqp->pd->uobject ?
+ to_eucontext(ibqp->pd->uobject->context) :
+ NULL;
+
+ if (!ucontext)
+ return -EOPNOTSUPP;
+
+ efa_destroy_qp_handle(dev, qp->qp_handle);
+ mmap_obj_entries_remove(ucontext, qp);
+
+ if (qp->rq_cpu_addr) {
+ pr_debug("qp->cpu_addr[%p] freed: size[%lu], dma[%pad]\n",
+ qp->rq_cpu_addr, qp->rq_size,
+ &qp->rq_dma_addr);
+ dma_free_coherent(&dev->pdev->dev, qp->rq_size,
+ qp->rq_cpu_addr, qp->rq_dma_addr);
+ }
+
+ kfree(qp);
+ return 0;
+}
+
+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)
+{
+ struct efa_mmap_entry *rq_db_entry;
+ struct efa_mmap_entry *sq_db_entry;
+ struct efa_mmap_entry *rq_entry;
+ struct efa_mmap_entry *sq_entry;
+
+ sq_db_entry = kzalloc(sizeof(*sq_db_entry), GFP_KERNEL);
+ sq_entry = kzalloc(sizeof(*sq_entry), GFP_KERNEL);
+ if (!sq_db_entry || !sq_entry) {
+ dev->stats.sw_stats.mmap_entry_alloc_err++;
+ goto err_alloc;
+ }
+
+ if (qp->rq_size) {
+ rq_entry = kzalloc(sizeof(*rq_entry), GFP_KERNEL);
+ rq_db_entry = kzalloc(sizeof(*rq_db_entry), GFP_KERNEL);
+ if (!rq_entry || !rq_db_entry) {
+ dev->stats.sw_stats.mmap_entry_alloc_err++;
+ goto err_alloc_rq;
+ }
+
+ rq_db_entry->obj = qp;
+ rq_entry->obj = qp;
+
+ rq_entry->address = virt_to_phys(qp->rq_cpu_addr);
+ rq_entry->length = qp->rq_size;
+ mmap_entry_insert(ucontext, rq_entry, 0);
+ resp->rq_mmap_key = rq_entry->key;
+ resp->rq_mmap_size = qp->rq_size;
+
+ rq_db_entry->address = dev->db_bar_addr +
+ resp->rq_db_offset;
+ rq_db_entry->length = PAGE_SIZE;
+ mmap_entry_insert(ucontext, rq_db_entry,
+ EFA_MMAP_DB_BAR_MEMORY_FLAG);
+ resp->rq_db_mmap_key = rq_db_entry->key;
+ resp->rq_db_offset &= ~PAGE_MASK;
+ }
+
+ sq_db_entry->obj = qp;
+ sq_entry->obj = qp;
+
+ sq_db_entry->address = dev->db_bar_addr + resp->sq_db_offset;
+ resp->sq_db_offset &= ~PAGE_MASK;
+ sq_db_entry->length = PAGE_SIZE;
+ mmap_entry_insert(ucontext, sq_db_entry, EFA_MMAP_DB_BAR_MEMORY_FLAG);
+ resp->sq_db_mmap_key = sq_db_entry->key;
+
+ sq_entry->address = dev->mem_bar_addr + resp->llq_desc_offset;
+ resp->llq_desc_offset &= ~PAGE_MASK;
+ sq_entry->length = PAGE_ALIGN(params->sq_ring_size_in_bytes +
+ resp->llq_desc_offset);
+ mmap_entry_insert(ucontext, sq_entry, EFA_MMAP_MEM_BAR_MEMORY_FLAG);
+ resp->llq_desc_mmap_key = sq_entry->key;
+
+ return 0;
+
+err_alloc_rq:
+ kfree(rq_entry);
+ kfree(rq_db_entry);
+err_alloc:
+ kfree(sq_entry);
+ kfree(sq_db_entry);
+ 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->caps.max_sq_depth) {
+ pr_err("qp: requested send wr[%u] exceeds the max[%u]\n",
+ init_attr->cap.max_send_wr,
+ dev->caps.max_sq_depth);
+ return -EINVAL;
+ }
+ if (init_attr->cap.max_recv_wr > dev->caps.max_rq_depth) {
+ pr_err("qp: requested receive wr[%u] exceeds the max[%u]\n",
+ init_attr->cap.max_recv_wr,
+ dev->caps.max_rq_depth);
+ return -EINVAL;
+ }
+ if (init_attr->cap.max_send_sge > dev->caps.max_sq_sge) {
+ pr_err("qp: requested sge send[%u] exceeds the max[%u]\n",
+ init_attr->cap.max_send_sge, dev->caps.max_sq_sge);
+ return -EINVAL;
+ }
+ if (init_attr->cap.max_recv_sge > dev->caps.max_rq_sge) {
+ pr_err("qp: requested sge recv[%u] exceeds the max[%u]\n",
+ init_attr->cap.max_recv_sge, dev->caps.max_rq_sge);
+ return -EINVAL;
+ }
+ if (init_attr->cap.max_inline_data > dev->caps.inline_buf_size) {
+ pr_warn("requested inline data[%u] exceeds the max[%u]\n",
+ init_attr->cap.max_inline_data,
+ dev->caps.inline_buf_size);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+struct ib_qp *efa_create_qp(struct ib_pd *ibpd,
+ 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(ibpd->device);
+ struct efa_ibv_create_qp_resp resp = {};
+ struct efa_ibv_create_qp cmd = {};
+ struct efa_ucontext *ucontext;
+ struct efa_qp *qp;
+ int err;
+
+ ucontext = ibpd->uobject ? to_eucontext(ibpd->uobject->context) :
+ NULL;
+
+ err = efa_qp_validate_cap(dev, init_attr);
+ if (err)
+ return ERR_PTR(err);
+
+ if (!ucontext)
+ return ERR_PTR(-EOPNOTSUPP);
+
+ if (init_attr->qp_type != IB_QPT_UD &&
+ init_attr->qp_type != IB_QPT_SRD) {
+ pr_err("unsupported qp type %d\n", init_attr->qp_type);
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (!udata || !field_avail(cmd, srd_qp, udata->inlen)) {
+ pr_err_ratelimited("Incompatible ABI params, no input udata\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (udata->inlen > sizeof(cmd) &&
+ !ib_is_udata_cleared(udata, sizeof(cmd),
+ udata->inlen - sizeof(cmd))) {
+ pr_err_ratelimited("Incompatible ABI params, unknown fields in udata\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ err = ib_copy_from_udata(&cmd, udata,
+ min(sizeof(cmd), udata->inlen));
+ if (err) {
+ pr_err_ratelimited("%s: cannot copy udata for create_qp\n",
+ dev_name(&dev->ibdev.dev));
+ return ERR_PTR(err);
+ }
+
+ if (cmd.comp_mask) {
+ pr_err_ratelimited("Incompatible ABI params, unknown fields in udata\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ qp = kzalloc(sizeof(*qp), GFP_KERNEL);
+ if (!qp) {
+ dev->stats.sw_stats.create_qp_alloc_err++;
+ return ERR_PTR(-ENOMEM);
+ }
+
+ create_qp_params.pd = to_epd(ibpd)->pdn;
+ if (init_attr->qp_type == IB_QPT_SRD)
+ create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_SRD;
+ else
+ create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_UD;
+
+ pr_debug("create QP, qp type %d srd qp %d\n",
+ init_attr->qp_type, cmd.srd_qp);
+ 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 = cmd.sq_depth;
+ create_qp_params.sq_ring_size_in_bytes = cmd.sq_ring_size;
+
+ create_qp_params.rq_ring_size_in_bytes = cmd.rq_entries *
+ cmd.rq_entry_size;
+ qp->rq_size = PAGE_ALIGN(create_qp_params.rq_ring_size_in_bytes);
+ if (qp->rq_size) {
+ qp->rq_cpu_addr = dma_zalloc_coherent(&dev->pdev->dev,
+ qp->rq_size,
+ &qp->rq_dma_addr,
+ GFP_KERNEL);
+ if (!qp->rq_cpu_addr) {
+ dev->stats.sw_stats.create_qp_alloc_err++;
+ err = -ENOMEM;
+ goto err_free_qp;
+ }
+ pr_debug("qp->cpu_addr[%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;
+ }
+
+ memset(&resp, 0, sizeof(resp));
+ err = efa_com_create_qp(dev->edev, &create_qp_params,
+ &create_qp_resp);
+ if (err) {
+ pr_err("failed to create qp %d\n", err);
+ err = -EINVAL;
+ goto err_free_dma;
+ }
+
+ WARN_ON_ONCE(create_qp_resp.sq_db_offset > dev->db_bar_len);
+ WARN_ON_ONCE(create_qp_resp.rq_db_offset > dev->db_bar_len);
+ WARN_ON_ONCE(create_qp_resp.llq_descriptors_offset >
+ dev->mem_bar_len);
+
+ 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->ibqp.qp_type = init_attr->qp_type;
+
+ if (udata && udata->outlen) {
+ err = ib_copy_to_udata(udata, &resp,
+ min(sizeof(resp), udata->outlen));
+ if (err) {
+ pr_err_ratelimited("failed to copy udata for qp[%u]",
+ create_qp_resp.qp_num);
+ goto err_mmap_remove;
+ }
+ }
+
+ pr_debug("Created qp[%d]\n", qp->ibqp.qp_num);
+
+ return &qp->ibqp;
+
+err_mmap_remove:
+ mmap_obj_entries_remove(ucontext, qp);
+err_destroy_qp:
+ efa_destroy_qp_handle(dev, create_qp_resp.qp_handle);
+err_free_dma:
+ if (qp->rq_size) {
+ pr_debug("qp->cpu_addr[%p] freed: size[%lu], dma[%pad]\n",
+ qp->rq_cpu_addr, qp->rq_size, &qp->rq_dma_addr);
+ dma_free_coherent(&dev->pdev->dev, qp->rq_size,
+ qp->rq_cpu_addr, qp->rq_dma_addr);
+ }
+err_free_qp:
+ kfree(qp);
+ return ERR_PTR(err);
+}
+
+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, ¶ms);
+}
+
+int efa_destroy_cq(struct ib_cq *ibcq)
+{
+ struct efa_dev *dev = to_edev(ibcq->device);
+ struct efa_cq *cq = to_ecq(ibcq);
+
+ pr_debug("Destroy cq[%d] virt[%p] freed: size[%lu], dma[%pad]\n",
+ cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr);
+ if (!cq->ucontext)
+ return -EOPNOTSUPP;
+
+ efa_destroy_cq_idx(dev, cq->cq_idx);
+
+ mmap_obj_entries_remove(cq->ucontext, cq);
+ dma_free_coherent(&dev->pdev->dev, cq->size,
+ cq->cpu_addr, cq->dma_addr);
+
+ kfree(cq);
+ return 0;
+}
+
+static int cq_mmap_entries_setup(struct efa_cq *cq,
+ struct efa_ibv_create_cq_resp *resp)
+{
+ struct efa_mmap_entry *cq_entry;
+
+ cq_entry = kzalloc(sizeof(*cq_entry), GFP_KERNEL);
+ if (!cq_entry)
+ return -ENOMEM;
+
+ cq_entry->obj = cq;
+
+ cq_entry->address = virt_to_phys(cq->cpu_addr);
+ cq_entry->length = cq->size;
+ mmap_entry_insert(cq->ucontext, cq_entry, 0);
+ resp->q_mmap_key = cq_entry->key;
+ resp->q_mmap_size = cq_entry->length;
+
+ return 0;
+}
+
+static struct ib_cq *do_create_cq(struct ib_device *ibdev, int entries,
+ int vector, struct ib_ucontext *ibucontext,
+ struct ib_udata *udata)
+{
+ struct efa_ibv_create_cq_resp resp = {};
+ struct efa_com_create_cq_params params;
+ struct efa_com_create_cq_result result;
+ struct efa_dev *dev = to_edev(ibdev);
+ struct efa_ibv_create_cq cmd = {};
+ struct efa_cq *cq;
+ int err;
+
+ pr_debug("entries %d udata %p\n", entries, udata);
+
+ if (entries < 1 || entries > dev->caps.max_cq_depth) {
+ pr_err("cq: requested entries[%u] non-positive or greater than max[%u]\n",
+ entries, dev->caps.max_cq_depth);
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (!ibucontext) {
+ pr_err("context is not valid ");
+ return ERR_PTR(-EOPNOTSUPP);
+ }
+
+ if (!udata || !field_avail(cmd, num_sub_cqs, udata->inlen)) {
+ pr_err_ratelimited("Incompatible ABI params, no input udata\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (udata->inlen > sizeof(cmd) &&
+ !ib_is_udata_cleared(udata, sizeof(cmd),
+ udata->inlen - sizeof(cmd))) {
+ pr_err_ratelimited("Incompatible ABI params, unknown fields in udata\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ err = ib_copy_from_udata(&cmd, udata,
+ min(sizeof(cmd), udata->inlen));
+ if (err) {
+ pr_err_ratelimited("%s: cannot copy udata for create_cq\n",
+ dev_name(&dev->ibdev.dev));
+ return ERR_PTR(err);
+ }
+
+ if (cmd.comp_mask || !EFA_IS_RESERVED_CLEARED(cmd.reserved_50)) {
+ pr_err_ratelimited("Incompatible ABI params, unknown fields in udata\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (!cmd.cq_entry_size) {
+ pr_err("invalid entry size [%u]\n", cmd.cq_entry_size);
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (cmd.num_sub_cqs != dev->caps.sub_cqs_per_cq) {
+ pr_err("invalid number of sub cqs[%u] expected[%u]\n",
+ cmd.num_sub_cqs, dev->caps.sub_cqs_per_cq);
+ return ERR_PTR(-EINVAL);
+ }
+
+ cq = kzalloc(sizeof(*cq), GFP_KERNEL);
+ if (!cq) {
+ dev->stats.sw_stats.create_cq_alloc_err++;
+ return ERR_PTR(-ENOMEM);
+ }
+
+ memset(&resp, 0, sizeof(resp));
+ cq->ucontext = to_eucontext(ibucontext);
+ cq->size = PAGE_ALIGN(cmd.cq_entry_size * entries * cmd.num_sub_cqs);
+ cq->cpu_addr = dma_zalloc_coherent(&dev->pdev->dev,
+ cq->size, &cq->dma_addr,
+ GFP_KERNEL);
+ if (!cq->cpu_addr) {
+ dev->stats.sw_stats.create_cq_alloc_err++;
+ err = -ENOMEM;
+ goto err_free_cq;
+ }
+ pr_debug("cq->cpu_addr[%p] allocated: size[%lu], dma[%pad]\n",
+ cq->cpu_addr, cq->size, &cq->dma_addr);
+
+ 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;
+ err = efa_com_create_cq(dev->edev, ¶ms, &result);
+ if (err) {
+ pr_err("failed to create cq [%d]!\n", err);
+ goto err_free_dma;
+ }
+
+ 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(cq, &resp);
+ if (err) {
+ pr_err("could not setup cq[%u] mmap entries!\n", cq->cq_idx);
+ goto err_destroy_cq;
+ }
+
+ if (udata && udata->outlen) {
+ err = ib_copy_to_udata(udata, &resp,
+ min(sizeof(resp), udata->outlen));
+ if (err) {
+ pr_err_ratelimited("failed to copy udata for %s",
+ dev_name(&dev->ibdev.dev));
+ goto err_mmap_remove;
+ }
+ }
+
+ pr_debug("Created cq[%d], cq depth[%u]. dma[%pad] virt[%p]\n",
+ cq->cq_idx, result.actual_depth, &cq->dma_addr, cq->cpu_addr);
+
+ return &cq->ibcq;
+
+err_mmap_remove:
+ mmap_obj_entries_remove(to_eucontext(ibucontext), cq);
+err_destroy_cq:
+ efa_destroy_cq_idx(dev, cq->cq_idx);
+err_free_dma:
+ pr_debug("cq->cpu_addr[%p] freed: size[%lu], dma[%pad]\n",
+ cq->cpu_addr, cq->size, &cq->dma_addr);
+ dma_free_coherent(&dev->pdev->dev, cq->size, cq->cpu_addr,
+ cq->dma_addr);
+err_free_cq:
+ kfree(cq);
+ return ERR_PTR(err);
+}
+
+struct ib_cq *efa_create_cq(struct ib_device *ibdev,
+ const struct ib_cq_init_attr *attr,
+ struct ib_ucontext *ibucontext,
+ struct ib_udata *udata)
+{
+ pr_debug("--->\n");
+ return do_create_cq(ibdev, attr->cqe, attr->comp_vector, ibucontext,
+ udata);
+}
+
+static int umem_to_page_list(struct ib_umem *umem,
+ u64 *page_list,
+ u32 hp_cnt,
+ u8 hp_shift)
+{
+ u32 pages_in_hp = BIT(hp_shift - PAGE_SHIFT);
+ unsigned int page_idx = 0;
+ unsigned int hp_idx = 0;
+ struct scatterlist *sg;
+ unsigned int entry;
+
+ if (umem->page_shift != PAGE_SHIFT)
+ return -EINVAL;
+
+ pr_debug("hp_cnt[%u], pages_in_hp[%u]\n", hp_cnt, pages_in_hp);
+
+ for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
+ if (unlikely(sg_dma_len(sg) != PAGE_SIZE)) {
+ pr_err("sg_dma_len[%u] != PAGE_SIZE[%lu]\n",
+ sg_dma_len(sg), PAGE_SIZE);
+ return -EINVAL;
+ }
+
+ if (page_idx % pages_in_hp == 0) {
+ page_list[hp_idx] = sg_dma_address(sg);
+ hp_idx++;
+ }
+ page_idx++;
+ }
+
+ return 0;
+}
+
+static struct scatterlist *efa_vmalloc_buf_to_sg(u64 *buf, int page_cnt)
+{
+ struct scatterlist *sglist;
+ struct page *pg;
+ int i;
+
+ sglist = kcalloc(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;
+ WARN_ON_ONCE(PageHighMem(pg));
+ sg_set_page(&sglist[i], pg, EFA_PAGE_SIZE, 0);
+ buf = (u64 *)((u8 *)buf + EFA_PAGE_SIZE);
+ }
+ 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 pbl_context *pbl)
+{
+ unsigned int entry, npg_in_sg, chunk_list_size, chunk_idx, page_idx;
+ 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;
+ 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 scatterlist *sg;
+ 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_PAGE_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;
+
+ pr_debug("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_ALLOC_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_PAGE_PTRS_PER_CHUNK) * EFA_PAGE_PTR_SIZE) +
+ EFA_CHUNK_PTR_SIZE;
+
+ /* fill the dma addresses of sg list pages to chunks: */
+ chunk_idx = 0;
+ page_idx = 0;
+ cur_chunk_buf = chunk_list->chunks[0].buf;
+ for_each_sg(pages_sgl, sg, sg_dma_cnt, entry) {
+ npg_in_sg = sg_dma_len(sg) >> EFA_PAGE_SHIFT;
+ for (i = 0; i < npg_in_sg; i++) {
+ cur_chunk_buf[page_idx++] = sg_dma_address(sg) +
+ (EFA_PAGE_SIZE * i);
+
+ if (page_idx == EFA_PAGE_PTRS_PER_CHUNK) {
+ chunk_idx++;
+ cur_chunk_buf = chunk_list->chunks[chunk_idx].buf;
+ page_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(pbl->dmadev,
+ chunk_list->chunks[i].buf,
+ chunk_list->chunks[i].length,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(pbl->dmadev, dma_addr)) {
+ pr_err("chunk[%u] dma_map_failed\n", i);
+ goto chunk_list_unmap;
+ }
+
+ chunk_list->chunks[i].dma_addr = dma_addr;
+ pr_debug("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_PAGE_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(pbl->dmadev, 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 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(pbl->dmadev, 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 pbl_context *pbl)
+{
+ dma_addr_t dma_addr;
+
+ dma_addr = dma_map_single(pbl->dmadev, pbl->pbl_buf,
+ pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
+ if (dma_mapping_error(pbl->dmadev, dma_addr)) {
+ pr_err("Unable to map pbl to DMA address");
+ return -ENOMEM;
+ }
+
+ pbl->phys.continuous.dma_addr = dma_addr;
+ pr_debug("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 pbl_context *pbl)
+{
+ u32 size_in_pages = DIV_ROUND_UP(pbl->pbl_buf_size_in_bytes,
+ EFA_PAGE_SIZE);
+ struct scatterlist *sgl;
+ int sg_dma_cnt, err;
+
+ sgl = efa_vmalloc_buf_to_sg(pbl->pbl_buf, size_in_pages);
+ if (!sgl)
+ return -ENOMEM;
+
+ sg_dma_cnt = dma_map_sg(pbl->dmadev, 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(pbl);
+ if (err) {
+ pr_err("chunk_list creation failed[%d]!\n", err);
+ goto err_chunk;
+ }
+
+ pr_debug("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(pbl->dmadev, sgl, size_in_pages, DMA_TO_DEVICE);
+err_map:
+ kfree(sgl);
+ return err;
+}
+
+static void pbl_indirect_terminate(struct pbl_context *pbl)
+{
+ pbl_chunk_list_destroy(pbl);
+ dma_unmap_sg(pbl->dmadev, 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 pbl_context *pbl,
+ struct efa_dev *dev,
+ struct ib_umem *umem,
+ int hp_cnt,
+ u8 hp_shift)
+{
+ int err;
+
+ pbl->dev = dev;
+ pbl->dmadev = &dev->pdev->dev;
+ pbl->pbl_buf_size_in_bytes = hp_cnt * EFA_PAGE_PTR_SIZE;
+ pbl->pbl_buf = kzalloc(pbl->pbl_buf_size_in_bytes,
+ GFP_KERNEL | __GFP_NOWARN);
+ if (pbl->pbl_buf) {
+ pbl->physically_continuous = true;
+ err = umem_to_page_list(umem, pbl->pbl_buf, hp_cnt, hp_shift);
+ if (err)
+ goto err_continuous;
+ err = pbl_continuous_initialize(pbl);
+ if (err)
+ goto err_continuous;
+ } else {
+ pbl->physically_continuous = false;
+ pbl->pbl_buf = vzalloc(pbl->pbl_buf_size_in_bytes);
+ if (!pbl->pbl_buf)
+ return -ENOMEM;
+
+ err = umem_to_page_list(umem, pbl->pbl_buf, hp_cnt, hp_shift);
+ if (err)
+ goto err_indirect;
+ err = pbl_indirect_initialize(pbl);
+ if (err)
+ goto err_indirect;
+ }
+
+ pr_debug("user_pbl_created: user_pages[%u], continuous[%u]\n",
+ hp_cnt, pbl->physically_continuous);
+
+ return 0;
+
+err_continuous:
+ kfree(pbl->pbl_buf);
+ return err;
+err_indirect:
+ vfree(pbl->pbl_buf);
+ return err;
+}
+
+static void pbl_destroy(struct pbl_context *pbl)
+{
+ if (pbl->physically_continuous) {
+ dma_unmap_single(pbl->dmadev, pbl->phys.continuous.dma_addr,
+ pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
+ kfree(pbl->pbl_buf);
+ } else {
+ pbl_indirect_terminate(pbl);
+ vfree(pbl->pbl_buf);
+ }
+}
+
+static int efa_create_inline_pbl(struct efa_mr *mr,
+ struct efa_com_reg_mr_params *params)
+{
+ int err;
+
+ params->inline_pbl = true;
+ err = umem_to_page_list(mr->umem, params->pbl.inline_pbl_array,
+ params->page_num, params->page_shift);
+ if (err) {
+ pr_err("failed to create inline pbl[%d]\n", err);
+ return err;
+ }
+
+ pr_debug("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(pbl, dev, mr->umem, params->page_num,
+ params->page_shift);
+ if (err) {
+ pr_err("failed to create pbl[%d]\n", err);
+ return err;
+ }
+
+ params->inline_pbl = false;
+ 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,
+ ¶ms->pbl.pbl.address.mem_addr_high,
+ ¶ms->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,
+ ¶ms->pbl.pbl.address.mem_addr_high,
+ ¶ms->pbl.pbl.address.mem_addr_low);
+ }
+
+ return 0;
+}
+
+static void efa_cont_pages(struct ib_umem *umem, u64 addr,
+ unsigned long max_page_shift,
+ int *count, u8 *shift, u32 *ncont)
+{
+ unsigned long page_shift = umem->page_shift;
+ struct scatterlist *sg;
+ u64 base = ~0, p = 0;
+ unsigned long tmp;
+ unsigned long m;
+ u64 len, pfn;
+ int i = 0;
+ int entry;
+
+ addr = addr >> page_shift;
+ tmp = (unsigned long)addr;
+ m = find_first_bit(&tmp, BITS_PER_LONG);
+ if (max_page_shift)
+ m = min_t(unsigned long, max_page_shift - page_shift, m);
+
+ for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
+ len = sg_dma_len(sg) >> page_shift;
+ pfn = sg_dma_address(sg) >> page_shift;
+ if (base + p != pfn) {
+ /*
+ * If either the offset or the new
+ * base are unaligned update m
+ */
+ tmp = (unsigned long)(pfn | p);
+ if (!IS_ALIGNED(tmp, 1 << m))
+ m = find_first_bit(&tmp, BITS_PER_LONG);
+
+ base = pfn;
+ p = 0;
+ }
+
+ p += len;
+ i += len;
+ }
+
+ if (i) {
+ m = min_t(unsigned long, ilog2(roundup_pow_of_two(i)), m);
+ *ncont = DIV_ROUND_UP(i, (1 << m));
+ } else {
+ m = 0;
+ *ncont = 0;
+ }
+
+ *shift = page_shift + m;
+ *count = i;
+}
+
+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_com_reg_mr_params params = {};
+ struct efa_com_reg_mr_result result = {};
+ struct pbl_context pbl;
+ struct efa_mr *mr;
+ int inline_size;
+ int npages;
+ int err;
+
+ if (udata && udata->inlen &&
+ !ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) {
+ pr_err_ratelimited("Incompatible ABI params, udata not cleared\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (access_flags & ~EFA_SUPPORTED_ACCESS_FLAGS) {
+ pr_err("Unsupported access flags[%#x], supported[%#x]\n",
+ access_flags, EFA_SUPPORTED_ACCESS_FLAGS);
+ return ERR_PTR(-EOPNOTSUPP);
+ }
+
+ mr = kzalloc(sizeof(*mr), GFP_KERNEL);
+ if (!mr) {
+ dev->stats.sw_stats.reg_mr_alloc_err++;
+ return ERR_PTR(-ENOMEM);
+ }
+
+ mr->umem = ib_umem_get(ibpd->uobject->context, start, length,
+ access_flags, 0);
+ if (IS_ERR(mr->umem)) {
+ err = PTR_ERR(mr->umem);
+ pr_err("failed to pin and map user space memory[%d]\n", err);
+ goto err;
+ }
+
+ params.pd = to_epd(ibpd)->pdn;
+ params.iova = virt_addr;
+ params.mr_length_in_bytes = length;
+ params.permissions = access_flags & 0x1;
+
+ efa_cont_pages(mr->umem, start,
+ EFA_ADMIN_REG_MR_CMD_PHYS_PAGE_SIZE_SHIFT_MASK, &npages,
+ ¶ms.page_shift, ¶ms.page_num);
+ pr_debug("start %#llx length %#llx npages %d params.page_shift %u params.page_num %u\n",
+ start, length, npages, 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(mr, ¶ms);
+ if (err)
+ goto err_unmap;
+
+ err = efa_com_register_mr(dev->edev, ¶ms, &result);
+ if (err) {
+ pr_err("efa_com_register_mr failed - %d!\n", err);
+ goto err_unmap;
+ }
+ } else {
+ err = efa_create_pbl(dev, &pbl, mr, ¶ms);
+ if (err)
+ goto err_unmap;
+
+ err = efa_com_register_mr(dev->edev, ¶ms, &result);
+ pbl_destroy(&pbl);
+
+ if (err) {
+ pr_err("efa_com_register_mr failed - %d!\n", err);
+ goto err_unmap;
+ }
+ }
+
+ mr->vaddr = virt_addr;
+ mr->ibmr.lkey = result.l_key;
+ mr->ibmr.rkey = result.r_key;
+ mr->ibmr.length = length;
+ pr_debug("Registered mr[%d]\n", mr->ibmr.lkey);
+
+ return &mr->ibmr;
+
+err_unmap:
+ ib_umem_release(mr->umem);
+err:
+ kfree(mr);
+ return ERR_PTR(err);
+}
+
+int efa_dereg_mr(struct ib_mr *ibmr)
+{
+ struct efa_dev *dev = to_edev(ibmr->device);
+ struct efa_com_dereg_mr_params params;
+ struct efa_mr *mr = to_emr(ibmr);
+
+ pr_debug("Deregister mr[%d]\n", ibmr->lkey);
+
+ if (mr->umem) {
+ params.l_key = mr->ibmr.lkey;
+ efa_com_dereg_mr(dev->edev, ¶ms);
+ ib_umem_release(mr->umem);
+ }
+
+ kfree(mr);
+
+ return 0;
+}
+
+int efa_get_port_immutable(struct ib_device *ibdev, u8 port_num,
+ struct ib_port_immutable *immutable)
+{
+ pr_debug("--->\n");
+ immutable->core_cap_flags = RDMA_CORE_CAP_PROT_EFA;
+ immutable->gid_tbl_len = 1;
+
+ return 0;
+}
+
+struct ib_ucontext *efa_alloc_ucontext(struct ib_device *ibdev,
+ struct ib_udata *udata)
+{
+ struct efa_ibv_alloc_ucontext_resp resp = {};
+ struct efa_dev *dev = to_edev(ibdev);
+ struct efa_ucontext *ucontext;
+ int err;
+
+ pr_debug("--->\n");
+ /*
+ * it's fine if the driver does not know all request fields,
+ * we will ack input fields in our response.
+ */
+
+ ucontext = kzalloc(sizeof(*ucontext), GFP_KERNEL);
+ if (!ucontext) {
+ dev->stats.sw_stats.alloc_ucontext_alloc_err++;
+ return ERR_PTR(-ENOMEM);
+ }
+
+ mutex_init(&ucontext->lock);
+ INIT_LIST_HEAD(&ucontext->pending_mmaps);
+
+ mutex_lock(&dev->efa_dev_lock);
+
+ 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.kernel_supp_mask |= EFA_KERNEL_SUPP_QPT_SRD;
+
+ if (udata && udata->outlen) {
+ err = ib_copy_to_udata(udata, &resp,
+ min(sizeof(resp), udata->outlen));
+ if (err)
+ goto err_resp;
+ }
+
+ list_add_tail(&ucontext->link, &dev->ctx_list);
+ mutex_unlock(&dev->efa_dev_lock);
+ return &ucontext->ibucontext;
+
+err_resp:
+ mutex_unlock(&dev->efa_dev_lock);
+ kfree(ucontext);
+ return ERR_PTR(err);
+}
+
+int efa_dealloc_ucontext(struct ib_ucontext *ibucontext)
+{
+ struct efa_ucontext *ucontext = to_eucontext(ibucontext);
+ struct efa_dev *dev = to_edev(ibucontext->device);
+
+ pr_debug("--->\n");
+
+ WARN_ON(!list_empty(&ucontext->pending_mmaps));
+
+ mutex_lock(&dev->efa_dev_lock);
+ list_del(&ucontext->link);
+ mutex_unlock(&dev->efa_dev_lock);
+ kfree(ucontext);
+ return 0;
+}
+
+static void mmap_obj_entries_remove(struct efa_ucontext *ucontext, void *obj)
+{
+ struct efa_mmap_entry *entry, *tmp;
+
+ pr_debug("--->\n");
+
+ mutex_lock(&ucontext->lock);
+ list_for_each_entry_safe(entry, tmp, &ucontext->pending_mmaps, list) {
+ if (entry->obj == obj) {
+ list_del(&entry->list);
+ pr_debug("mmap: obj[%p] key[0x%llx] addr[0x%llX] len[0x%llX] removed\n",
+ entry->obj, entry->key, entry->address,
+ entry->length);
+ kfree(entry);
+ }
+ }
+ mutex_unlock(&ucontext->lock);
+}
+
+static struct efa_mmap_entry *mmap_entry_remove(struct efa_ucontext *ucontext,
+ u64 key,
+ u64 len)
+{
+ struct efa_mmap_entry *entry, *tmp;
+
+ mutex_lock(&ucontext->lock);
+ list_for_each_entry_safe(entry, tmp, &ucontext->pending_mmaps, list) {
+ if (entry->key == key && entry->length == len) {
+ list_del_init(&entry->list);
+ pr_debug("mmap: obj[%p] key[0x%llx] addr[0x%llX] len[0x%llX] removed\n",
+ entry->obj, key, entry->address,
+ entry->length);
+ mutex_unlock(&ucontext->lock);
+ return entry;
+ }
+ }
+ mutex_unlock(&ucontext->lock);
+
+ return NULL;
+}
+
+static void mmap_entry_insert(struct efa_ucontext *ucontext,
+ struct efa_mmap_entry *entry,
+ u64 mem_flag)
+{
+ mutex_lock(&ucontext->lock);
+ entry->key = ucontext->mmap_key | mem_flag;
+ ucontext->mmap_key += PAGE_SIZE;
+ list_add_tail(&entry->list, &ucontext->pending_mmaps);
+ pr_debug("mmap: obj[%p] addr[0x%llx], len[0x%llx], key[0x%llx] inserted\n",
+ entry->obj, entry->address, entry->length, entry->key);
+ mutex_unlock(&ucontext->lock);
+}
+
+static int __efa_mmap(struct efa_dev *dev,
+ struct vm_area_struct *vma,
+ u64 mmap_flag,
+ u64 address,
+ u64 length)
+{
+ u64 pfn = address >> PAGE_SHIFT;
+ int err;
+
+ switch (mmap_flag) {
+ case EFA_MMAP_REG_BAR_MEMORY_FLAG:
+ pr_debug("mapping address[0x%llX], length[0x%llX] on register BAR!",
+ address, length);
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ err = io_remap_pfn_range(vma, vma->vm_start, pfn, length,
+ vma->vm_page_prot);
+ break;
+ case EFA_MMAP_MEM_BAR_MEMORY_FLAG:
+ pr_debug("mapping address 0x%llX, length[0x%llX] on memory BAR!",
+ address, length);
+ vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+ err = io_remap_pfn_range(vma, vma->vm_start, pfn, length,
+ vma->vm_page_prot);
+ break;
+ case EFA_MMAP_DB_BAR_MEMORY_FLAG:
+ pr_debug("mapping address 0x%llX, length[0x%llX] on DB BAR!",
+ address, length);
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ err = io_remap_pfn_range(vma, vma->vm_start, pfn, length,
+ vma->vm_page_prot);
+ break;
+ default:
+ pr_debug("mapping address[0x%llX], length[0x%llX] of dma buffer!\n",
+ address, length);
+ err = remap_pfn_range(vma, vma->vm_start, pfn, length,
+ vma->vm_page_prot);
+ }
+
+ 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);
+ u64 length = vma->vm_end - vma->vm_start;
+ u64 key = vma->vm_pgoff << PAGE_SHIFT;
+ struct efa_mmap_entry *entry;
+ u64 mmap_flag;
+ u64 address;
+
+ pr_debug("start 0x%lx, end 0x%lx, length = 0x%llx, key = 0x%llx\n",
+ vma->vm_start, vma->vm_end, length, key);
+
+ if (length % PAGE_SIZE != 0) {
+ pr_err("length[0x%llX] is not page size aligned[0x%lX]!",
+ length, PAGE_SIZE);
+ return -EINVAL;
+ }
+
+ entry = mmap_entry_remove(ucontext, key, length);
+ if (!entry) {
+ pr_err("key[0x%llX] does not have valid entry!", key);
+ return -EINVAL;
+ }
+ address = entry->address;
+ kfree(entry);
+
+ mmap_flag = key & EFA_MMAP_BARS_MEMORY_MASK;
+ return __efa_mmap(dev, vma, mmap_flag, address, length);
+}
+
+static inline bool efa_ah_id_equal(u8 *id1, u8 *id2)
+{
+ return !memcmp(id1, id2, EFA_GID_SIZE);
+}
+
+static int efa_get_ah_by_id(struct efa_dev *dev, u8 *id,
+ u16 *ah_res, bool ref_update)
+{
+ struct efa_ah_id *ah_id;
+
+ list_for_each_entry(ah_id, &dev->efa_ah_list, list) {
+ if (efa_ah_id_equal(ah_id->id, id)) {
+ *ah_res = ah_id->address_handle;
+ if (ref_update)
+ ah_id->ref_count++;
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int efa_add_ah_id(struct efa_dev *dev, u8 *id,
+ u16 address_handle)
+{
+ struct efa_ah_id *ah_id;
+
+ ah_id = kzalloc(sizeof(*ah_id), GFP_KERNEL);
+ if (!ah_id)
+ return -ENOMEM;
+
+ memcpy(ah_id->id, id, sizeof(ah_id->id));
+ ah_id->address_handle = address_handle;
+ ah_id->ref_count = 1;
+ list_add_tail(&ah_id->list, &dev->efa_ah_list);
+
+ return 0;
+}
+
+static void efa_remove_ah_id(struct efa_dev *dev, u8 *id, u32 *ref_count)
+{
+ struct efa_ah_id *ah_id, *tmp;
+
+ list_for_each_entry_safe(ah_id, tmp, &dev->efa_ah_list, list) {
+ if (efa_ah_id_equal(ah_id->id, id)) {
+ *ref_count = --ah_id->ref_count;
+ if (ah_id->ref_count == 0) {
+ list_del(&ah_id->list);
+ kfree(ah_id);
+ return;
+ }
+ }
+ }
+}
+
+static void ah_destroy_on_device(struct efa_dev *dev, u16 device_ah)
+{
+ struct efa_com_destroy_ah_params params;
+ int err;
+
+ params.ah = device_ah;
+ err = efa_com_destroy_ah(dev->edev, ¶ms);
+ if (err)
+ pr_err("efa_com_destroy_ah failed (%d)\n", err);
+}
+
+static int efa_create_ah_id(struct efa_dev *dev, u8 *id,
+ u16 *efa_address_handle)
+{
+ struct efa_com_create_ah_params params = {};
+ struct efa_com_create_ah_result result = {};
+ int err;
+
+ mutex_lock(&dev->ah_list_lock);
+ err = efa_get_ah_by_id(dev, id, efa_address_handle, true);
+ if (err) {
+ memcpy(params.dest_addr, id, sizeof(params.dest_addr));
+ err = efa_com_create_ah(dev->edev, ¶ms, &result);
+ if (err) {
+ pr_err("efa_com_create_ah failed %d\n", err);
+ goto err_unlock;
+ }
+
+ pr_debug("create address handle %u for address %pI6\n",
+ result.ah, params.dest_addr);
+
+ err = efa_add_ah_id(dev, id, result.ah);
+ if (err) {
+ pr_err("efa_add_ah_id failed %d\n", err);
+ goto err_destroy_ah;
+ }
+
+ *efa_address_handle = result.ah;
+ }
+ mutex_unlock(&dev->ah_list_lock);
+
+ return 0;
+
+err_destroy_ah:
+ ah_destroy_on_device(dev, result.ah);
+err_unlock:
+ mutex_unlock(&dev->ah_list_lock);
+ return err;
+}
+
+static void efa_destroy_ah_id(struct efa_dev *dev, u8 *id)
+{
+ u16 device_ah;
+ u32 ref_count;
+ int err;
+
+ mutex_lock(&dev->ah_list_lock);
+ err = efa_get_ah_by_id(dev, id, &device_ah, false);
+ if (err) {
+ WARN_ON(1);
+ goto out_unlock;
+ }
+
+ efa_remove_ah_id(dev, id, &ref_count);
+ if (!ref_count)
+ ah_destroy_on_device(dev, device_ah);
+
+out_unlock:
+ mutex_unlock(&dev->ah_list_lock);
+}
+
+struct ib_ah *efa_create_ah(struct ib_pd *ibpd,
+ struct rdma_ah_attr *ah_attr,
+ struct ib_udata *udata)
+{
+ struct efa_dev *dev = to_edev(ibpd->device);
+ struct efa_ibv_create_ah_resp resp = {};
+ u16 efa_address_handle;
+ struct efa_ah *ah;
+ int err;
+
+ pr_debug("--->\n");
+
+ if (udata && udata->inlen &&
+ !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+ pr_err_ratelimited("Incompatiable ABI params\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ ah = kzalloc(sizeof(*ah), GFP_KERNEL);
+ if (!ah) {
+ dev->stats.sw_stats.create_ah_alloc_err++;
+ return ERR_PTR(-ENOMEM);
+ }
+
+ err = efa_create_ah_id(dev, ah_attr->grh.dgid.raw, &efa_address_handle);
+ if (err)
+ goto err_free;
+
+ resp.efa_address_handle = efa_address_handle;
+
+ if (udata && udata->outlen) {
+ err = ib_copy_to_udata(udata, &resp,
+ min(sizeof(resp), udata->outlen));
+ if (err) {
+ pr_err_ratelimited("failed to copy udata for create_ah response\n");
+ goto err_destroy_ah;
+ }
+ }
+
+ memcpy(ah->id, ah_attr->grh.dgid.raw, sizeof(ah->id));
+ return &ah->ibah;
+
+err_destroy_ah:
+ efa_destroy_ah_id(dev, ah_attr->grh.dgid.raw);
+err_free:
+ kfree(ah);
+ return ERR_PTR(err);
+}
+
+int efa_destroy_ah(struct ib_ah *ibah)
+{
+ struct efa_dev *dev = to_edev(ibah->pd->device);
+ struct efa_ah *ah = to_eah(ibah);
+
+ pr_debug("--->\n");
+ efa_destroy_ah_id(dev, ah->id);
+
+ kfree(ah);
+ return 0;
+}
+
+/* In ib callbacks section - Start of stub funcs */
+int efa_post_send(struct ib_qp *ibqp,
+ const struct ib_send_wr *wr,
+ const struct ib_send_wr **bad_wr)
+{
+ pr_warn("Function not supported\n");
+ return -EOPNOTSUPP;
+}
+
+int efa_post_recv(struct ib_qp *ibqp,
+ const struct ib_recv_wr *wr,
+ const struct ib_recv_wr **bad_wr)
+{
+ pr_warn("Function not supported\n");
+ return -EOPNOTSUPP;
+}
+
+int efa_poll_cq(struct ib_cq *ibcq, int num_entries,
+ struct ib_wc *wc)
+{
+ pr_warn("Function not supported\n");
+ return -EOPNOTSUPP;
+}
+
+int efa_req_notify_cq(struct ib_cq *ibcq,
+ enum ib_cq_notify_flags flags)
+{
+ pr_warn("Function not supported\n");
+ return -EOPNOTSUPP;
+}
+
+struct ib_mr *efa_get_dma_mr(struct ib_pd *ibpd, int acc)
+{
+ pr_warn("Function not supported\n");
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
+int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int attr_mask, struct ib_udata *udata)
+{
+ pr_warn("Function not supported\n");
+ return -EOPNOTSUPP;
+}
+
+enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev,
+ u8 port_num)
+{
+ pr_debug("--->\n");
+ return IB_LINK_LAYER_ETHERNET;
+}
+
--
2.7.4
