Commit 40909f66 authored by Gal Pressman's avatar Gal Pressman Committed by Jason Gunthorpe

RDMA/efa: Add EFA verbs implementation

Add a file that implements the EFA verbs.
Signed-off-by: default avatarGal Pressman <galpress@amazon.com>
Reviewed-by: default avatarShiraz Saleem <shiraz.saleem@intel.com>
Reviewed-by: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent e9c6c537
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All rights reserved.
*/
#include <linux/vmalloc.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"
#define EFA_MMAP_FLAG_SHIFT 56
#define EFA_MMAP_PAGE_MASK GENMASK(EFA_MMAP_FLAG_SHIFT - 1, 0)
#define EFA_MMAP_INVALID U64_MAX
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_mmap_entry {
void *obj;
u64 address;
u64 length;
u32 mmap_page;
u8 mmap_flag;
};
static inline u64 get_mmap_key(const struct efa_mmap_entry *efa)
{
return ((u64)efa->mmap_flag << EFA_MMAP_FLAG_SHIFT) |
((u64)efa->mmap_page << PAGE_SHIFT);
}
#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)
#define EFA_SUPPORTED_ACCESS_FLAGS IB_ACCESS_LOCAL_WRITE
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);
}
#define field_avail(x, fld, sz) (offsetof(typeof(x), fld) + \
sizeof(((typeof(x) *)0)->fld) <= (sz))
#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;
}
/*
* This is only called when the ucontext is destroyed and there can be no
* concurrent query via mmap or allocate on the xarray, thus we can be sure no
* other thread is using the entry pointer. We also know that all the BAR
* pages have either been zap'd or munmaped at this point. Normal pages are
* refcounted and will be freed at the proper time.
*/
static void mmap_entries_remove_free(struct efa_dev *dev,
struct efa_ucontext *ucontext)
{
struct efa_mmap_entry *entry;
unsigned long mmap_page;
xa_for_each(&ucontext->mmap_xa, mmap_page, entry) {
xa_erase(&ucontext->mmap_xa, mmap_page);
ibdev_dbg(
&dev->ibdev,
"mmap: obj[0x%p] key[%#llx] addr[%#llx] len[%#llx] removed\n",
entry->obj, get_mmap_key(entry), entry->address,
entry->length);
if (entry->mmap_flag == EFA_MMAP_DMA_PAGE)
/* DMA mapping is already gone, now free the pages */
free_pages_exact(phys_to_virt(entry->address),
entry->length);
kfree(entry);
}
}
static struct efa_mmap_entry *mmap_entry_get(struct efa_dev *dev,
struct efa_ucontext *ucontext,
u64 key, u64 len)
{
struct efa_mmap_entry *entry;
u64 mmap_page;
mmap_page = (key & EFA_MMAP_PAGE_MASK) >> PAGE_SHIFT;
if (mmap_page > U32_MAX)
return NULL;
entry = xa_load(&ucontext->mmap_xa, mmap_page);
if (!entry || get_mmap_key(entry) != key || entry->length != len)
return NULL;
ibdev_dbg(&dev->ibdev,
"mmap: obj[0x%p] key[%#llx] addr[%#llx] len[%#llx] removed\n",
entry->obj, key, entry->address, entry->length);
return entry;
}
/*
* Note this locking scheme cannot support removal of entries, except during
* ucontext destruction when the core code guarentees no concurrency.
*/
static u64 mmap_entry_insert(struct efa_dev *dev, struct efa_ucontext *ucontext,
void *obj, u64 address, u64 length, u8 mmap_flag)
{
struct efa_mmap_entry *entry;
int err;
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
return EFA_MMAP_INVALID;
entry->obj = obj;
entry->address = address;
entry->length = length;
entry->mmap_flag = mmap_flag;
xa_lock(&ucontext->mmap_xa);
entry->mmap_page = ucontext->mmap_xa_page;
ucontext->mmap_xa_page += DIV_ROUND_UP(length, PAGE_SIZE);
err = __xa_insert(&ucontext->mmap_xa, entry->mmap_page, entry,
GFP_KERNEL);
xa_unlock(&ucontext->mmap_xa);
if (err){
kfree(entry);
return EFA_MMAP_INVALID;
}
ibdev_dbg(
&dev->ibdev,
"mmap: obj[0x%p] addr[%#llx], len[%#llx], key[%#llx] inserted\n",
entry->obj, entry->address, entry->length, get_mmap_key(entry));
return get_mmap_key(entry);
}
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;
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;
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, u8 port,
struct ib_port_attr *props)
{
struct efa_dev *dev = to_edev(ibdev);
props->lmc = 1;
props->state = IB_PORT_ACTIVE;
props->phys_state = 5;
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->mtu);
props->active_mtu = ib_mtu_int_to_enum(dev->mtu);
props->max_msg_sz = dev->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)
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->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, u8 port, int index,
union ib_gid *gid)
{
struct efa_dev *dev = to_edev(ibdev);
memcpy(gid->raw, dev->addr, sizeof(dev->addr));
return 0;
}
int efa_query_pkey(struct ib_device *ibdev, u8 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.sw_stats.alloc_pd_err);
return err;
}
void 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);
if (udata->inlen &&
!ib_is_udata_cleared(udata, 0, udata->inlen)) {
ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
return;
}
ibdev_dbg(&dev->ibdev, "Dealloc pd[%d]\n", pd->pdn);
efa_pd_dealloc(dev, pd->pdn);
}
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);
}
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;
if (udata->inlen &&
!ib_is_udata_cleared(udata, 0, udata->inlen)) {
ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
return -EINVAL;
}
ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num);
err = efa_destroy_qp_handle(dev, qp->qp_handle);
if (err)
return err;
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);
dma_unmap_single(&dev->pdev->dev, qp->rq_dma_addr, qp->rq_size,
DMA_TO_DEVICE);
}
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)
{
/*
* Once an entry is inserted it might be mmapped, hence cannot be
* cleaned up until dealloc_ucontext.
*/
resp->sq_db_mmap_key =
mmap_entry_insert(dev, ucontext, qp,
dev->db_bar_addr + resp->sq_db_offset,
PAGE_SIZE, EFA_MMAP_IO_NC);
if (resp->sq_db_mmap_key == EFA_MMAP_INVALID)
return -ENOMEM;
resp->sq_db_offset &= ~PAGE_MASK;
resp->llq_desc_mmap_key =
mmap_entry_insert(dev, ucontext, qp,
dev->mem_bar_addr + resp->llq_desc_offset,
PAGE_ALIGN(params->sq_ring_size_in_bytes +
(resp->llq_desc_offset & ~PAGE_MASK)),
EFA_MMAP_IO_WC);
if (resp->llq_desc_mmap_key == EFA_MMAP_INVALID)
return -ENOMEM;
resp->llq_desc_offset &= ~PAGE_MASK;
if (qp->rq_size) {
resp->rq_db_mmap_key =
mmap_entry_insert(dev, ucontext, qp,
dev->db_bar_addr + resp->rq_db_offset,
PAGE_SIZE, EFA_MMAP_IO_NC);
if (resp->rq_db_mmap_key == EFA_MMAP_INVALID)
return -ENOMEM;
resp->rq_db_offset &= ~PAGE_MASK;
resp->rq_mmap_key =
mmap_entry_insert(dev, ucontext, qp,
virt_to_phys(qp->rq_cpu_addr),
qp->rq_size, EFA_MMAP_DMA_PAGE);
if (resp->rq_mmap_key == EFA_MMAP_INVALID)
return -ENOMEM;
resp->rq_mmap_size = qp->rq_size;
}
return 0;
}
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;
}
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 = {};
bool rq_entry_inserted = false;
struct efa_ucontext *ucontext;
struct efa_qp *qp;
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 (!field_avail(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;
}
qp = kzalloc(sizeof(*qp), GFP_KERNEL);
if (!qp) {
err = -ENOMEM;
goto err_out;
}
create_qp_params.uarn = ucontext->uarn;
create_qp_params.pd = to_epd(ibpd)->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_free_qp;
}
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_free_qp;
}
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;
rq_entry_inserted = true;
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;
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_destroy_qp;
}
}
ibdev_dbg(&dev->ibdev, "Created qp[%d]\n", qp->ibqp.qp_num);
return &qp->ibqp;
err_destroy_qp:
efa_destroy_qp_handle(dev, create_qp_resp.qp_handle);
err_free_mapped:
if (qp->rq_size) {
dma_unmap_single(&dev->pdev->dev, qp->rq_dma_addr, qp->rq_size,
DMA_TO_DEVICE);
if (!rq_entry_inserted)
free_pages_exact(qp->rq_cpu_addr, qp->rq_size);
}
err_free_qp:
kfree(qp);
err_out:
atomic64_inc(&dev->stats.sw_stats.create_qp_err);
return ERR_PTR(err);
}
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)
{
#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)
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 (!ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD,
qp_attr_mask)) {
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 (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) {
params.modify_mask |= BIT(EFA_ADMIN_QP_STATE_BIT) |
BIT(EFA_ADMIN_CUR_QP_STATE_BIT);
params.cur_qp_state = qp_attr->cur_qp_state;
params.qp_state = qp_attr->qp_state;
}
if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
params.modify_mask |=
BIT(EFA_ADMIN_SQ_DRAINED_ASYNC_NOTIFY_BIT);
params.sq_drained_async_notify = qp_attr->en_sqd_async_notify;
}
if (qp_attr_mask & IB_QP_QKEY) {
params.modify_mask |= BIT(EFA_ADMIN_QKEY_BIT);
params.qkey = qp_attr->qkey;
}
if (qp_attr_mask & IB_QP_SQ_PSN) {
params.modify_mask |= BIT(EFA_ADMIN_SQ_PSN_BIT);
params.sq_psn = qp_attr->sq_psn;
}
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);
}
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);
int err;
if (udata->inlen &&
!ib_is_udata_cleared(udata, 0, udata->inlen)) {
ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
return -EINVAL;
}
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);
err = efa_destroy_cq_idx(dev, cq->cq_idx);
if (err)
return err;
dma_unmap_single(&dev->pdev->dev, cq->dma_addr, cq->size,
DMA_FROM_DEVICE);
kfree(cq);
return 0;
}
static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq,
struct efa_ibv_create_cq_resp *resp)
{
resp->q_mmap_size = cq->size;
resp->q_mmap_key = mmap_entry_insert(dev, cq->ucontext, cq,
virt_to_phys(cq->cpu_addr),
cq->size, EFA_MMAP_DMA_PAGE);
if (resp->q_mmap_key == EFA_MMAP_INVALID)
return -ENOMEM;
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 = {};
bool cq_entry_inserted = false;
struct efa_cq *cq;
int err;
ibdev_dbg(ibdev, "create_cq entries %d\n", entries);
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 (!field_avail(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_50)) {
ibdev_dbg(ibdev,
"Incompatible ABI params, unknown fields in udata\n");
err = -EINVAL;
goto err_out;
}
if (!cmd.cq_entry_size) {
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 = kzalloc(sizeof(*cq), GFP_KERNEL);
if (!cq) {
err = -ENOMEM;
goto err_out;
}
cq->ucontext = to_eucontext(ibucontext);
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_free_cq;
}
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;
err = efa_com_create_cq(&dev->edev, &params, &result);
if (err)
goto err_free_mapped;
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);
if (err) {
ibdev_dbg(ibdev,
"Could not setup cq[%u] mmap entries\n", cq->cq_idx);
goto err_destroy_cq;
}
cq_entry_inserted = true;
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_destroy_cq;
}
}
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 &cq->ibcq;
err_destroy_cq:
efa_destroy_cq_idx(dev, cq->cq_idx);
err_free_mapped:
dma_unmap_single(&dev->pdev->dev, cq->dma_addr, cq->size,
DMA_FROM_DEVICE);
if (!cq_entry_inserted)
free_pages_exact(cq->cpu_addr, cq->size);
err_free_cq:
kfree(cq);
err_out:
atomic64_inc(&dev->stats.sw_stats.create_cq_err);
return ERR_PTR(err);
}
struct ib_cq *efa_create_cq(struct ib_device *ibdev,
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);
return do_create_cq(ibdev, attr->cqe, attr->comp_vector,
&ucontext->ibucontext, udata);
}
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 sg_dma_page_iter sg_iter;
unsigned int page_idx = 0;
unsigned int hp_idx = 0;
ibdev_dbg(&dev->ibdev, "hp_cnt[%u], pages_in_hp[%u]\n",
hp_cnt, pages_in_hp);
for_each_sg_dma_page(umem->sg_head.sgl, &sg_iter, umem->nmap, 0) {
if (page_idx % pages_in_hp == 0) {
page_list[hp_idx] = sg_page_iter_dma_address(&sg_iter);
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;
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)
{
unsigned int entry, payloads_in_sg, chunk_list_size, chunk_idx, payload_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_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;
for_each_sg(pages_sgl, sg, sg_dma_cnt, entry) {
payloads_in_sg = sg_dma_len(sg) >> EFA_CHUNK_PAYLOAD_SHIFT;
for (i = 0; i < payloads_in_sg; i++) {
cur_chunk_buf[payload_idx++] =
(sg_dma_address(sg) & ~(EFA_CHUNK_PAYLOAD_SIZE - 1)) +
(EFA_CHUNK_PAYLOAD_SIZE * i);
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, PAGE_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 = kzalloc(pbl->pbl_buf_size_in_bytes,
GFP_KERNEL | __GFP_NOWARN);
if (pbl->pbl_buf) {
pbl->physically_continuous = 1;
err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
hp_shift);
if (err)
goto err_continuous;
err = pbl_continuous_initialize(dev, pbl);
if (err)
goto err_continuous;
} else {
pbl->physically_continuous = 0;
pbl->pbl_buf = vzalloc(pbl->pbl_buf_size_in_bytes);
if (!pbl->pbl_buf)
return -ENOMEM;
err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
hp_shift);
if (err)
goto err_indirect;
err = pbl_indirect_initialize(dev, pbl);
if (err)
goto err_indirect;
}
ibdev_dbg(&dev->ibdev,
"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 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);
kfree(pbl->pbl_buf);
} else {
pbl_indirect_terminate(dev, pbl);
vfree(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 void efa_cont_pages(struct ib_umem *umem, u64 addr,
unsigned long max_page_shift,
int *count, u8 *shift, u32 *ncont)
{
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 = DIV_ROUND_UP(sg_dma_len(sg), PAGE_SIZE);
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 = {};
unsigned long max_page_shift;
struct pbl_context pbl;
struct efa_mr *mr;
int inline_size;
int npages;
int err;
if (udata->inlen &&
!ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) {
ibdev_dbg(&dev->ibdev,
"Incompatible ABI params, udata not cleared\n");
err = -EINVAL;
goto err_out;
}
if (access_flags & ~EFA_SUPPORTED_ACCESS_FLAGS) {
ibdev_dbg(&dev->ibdev,
"Unsupported access flags[%#x], supported[%#x]\n",
access_flags, EFA_SUPPORTED_ACCESS_FLAGS);
err = -EOPNOTSUPP;
goto err_out;
}
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr) {
err = -ENOMEM;
goto err_out;
}
mr->umem = ib_umem_get(udata, start, length, access_flags, 0);
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;
}
params.pd = to_epd(ibpd)->pdn;
params.iova = virt_addr;
params.mr_length_in_bytes = length;
params.permissions = access_flags & 0x1;
max_page_shift = fls64(dev->dev_attr.page_size_cap);
efa_cont_pages(mr->umem, start, max_page_shift, &npages,
&params.page_shift, &params.page_num);
ibdev_dbg(&dev->ibdev,
"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(dev, mr, &params);
if (err)
goto err_unmap;
err = efa_com_register_mr(&dev->edev, &params, &result);
if (err)
goto err_unmap;
} else {
err = efa_create_pbl(dev, &pbl, mr, &params);
if (err)
goto err_unmap;
err = efa_com_register_mr(&dev->edev, &params, &result);
pbl_destroy(dev, &pbl);
if (err)
goto err_unmap;
}
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 &mr->ibmr;
err_unmap:
ib_umem_release(mr->umem);
err_free:
kfree(mr);
err_out:
atomic64_inc(&dev->stats.sw_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;
if (udata->inlen &&
!ib_is_udata_cleared(udata, 0, udata->inlen)) {
ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
return -EINVAL;
}
ibdev_dbg(&dev->ibdev, "Deregister mr[%d]\n", ibmr->lkey);
if (mr->umem) {
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, u8 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);
}
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_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 = efa_com_alloc_uar(&dev->edev, &result);
if (err)
goto err_out;
ucontext->uarn = result.uarn;
xa_init(&ucontext->mmap_xa);
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;
if (udata && udata->outlen) {
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.sw_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);
mmap_entries_remove_free(dev, ucontext);
efa_dealloc_uar(dev, ucontext->uarn);
}
static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext,
struct vm_area_struct *vma, u64 key, u64 length)
{
struct efa_mmap_entry *entry;
unsigned long va;
u64 pfn;
int err;
entry = mmap_entry_get(dev, ucontext, key, length);
if (!entry) {
ibdev_dbg(&dev->ibdev, "key[%#llx] does not have valid entry\n",
key);
return -EINVAL;
}
ibdev_dbg(&dev->ibdev,
"Mapping address[%#llx], length[%#llx], mmap_flag[%d]\n",
entry->address, length, 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, length,
pgprot_noncached(vma->vm_page_prot));
break;
case EFA_MMAP_IO_WC:
err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn, length,
pgprot_writecombine(vma->vm_page_prot));
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[%#llx] mmap_flag[%d] err[%d]\n",
entry->address, length, entry->mmap_flag, err);
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;
ibdev_dbg(&dev->ibdev,
"start %#lx, end %#lx, length = %#llx, key = %#llx\n",
vma->vm_start, vma->vm_end, length, key);
if (length % PAGE_SIZE != 0 || !(vma->vm_flags & VM_SHARED)) {
ibdev_dbg(&dev->ibdev,
"length[%#llx] is not page size aligned[%#lx] or VM_SHARED is not set [%#lx]\n",
length, PAGE_SIZE, vma->vm_flags);
return -EINVAL;
}
if (vma->vm_flags & VM_EXEC) {
ibdev_dbg(&dev->ibdev, "Mapping executable pages is not permitted\n");
return -EPERM;
}
vma->vm_flags &= ~VM_MAYEXEC;
return __efa_mmap(dev, ucontext, vma, key, length);
}
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_attr *ah_attr,
u32 flags,
struct ib_udata *udata)
{
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 (!(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.sw_stats.create_ah_err);
return err;
}
void 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;
}
efa_ah_destroy(dev, ah);
}
enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev,
u8 port_num)
{
return IB_LINK_LAYER_UNSPECIFIED;
}
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