649 lines
12 KiB
C
649 lines
12 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
|
||
|
|
* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
|
||
|
|
*
|
||
|
|
* This software is available to you under a choice of one of two
|
||
|
|
* licenses. You may choose to be licensed under the terms of the GNU
|
||
|
|
* General Public License (GPL) Version 2, available from the file
|
||
|
|
* COPYING in the main directory of this source tree, or the
|
||
|
|
* OpenIB.org BSD license below:
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or
|
||
|
|
* without modification, are permitted provided that the following
|
||
|
|
* conditions are met:
|
||
|
|
*
|
||
|
|
* - Redistributions of source code must retain the above
|
||
|
|
* copyright notice, this list of conditions and the following
|
||
|
|
* disclaimer.
|
||
|
|
*
|
||
|
|
* - Redistributions in binary form must reproduce the above
|
||
|
|
* copyright notice, this list of conditions and the following
|
||
|
|
* disclaimer in the documentation and/or other materials
|
||
|
|
* provided with the distribution.
|
||
|
|
*
|
||
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
||
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
||
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
||
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||
|
|
* SOFTWARE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "rxe.h"
|
||
|
|
#include "rxe_loc.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* lfsr (linear feedback shift register) with period 255
|
||
|
|
*/
|
||
|
|
static u8 rxe_get_key(void)
|
||
|
|
{
|
||
|
|
static u32 key = 1;
|
||
|
|
|
||
|
|
key = key << 1;
|
||
|
|
|
||
|
|
key |= (0 != (key & 0x100)) ^ (0 != (key & 0x10))
|
||
|
|
^ (0 != (key & 0x80)) ^ (0 != (key & 0x40));
|
||
|
|
|
||
|
|
key &= 0xff;
|
||
|
|
|
||
|
|
return key;
|
||
|
|
}
|
||
|
|
|
||
|
|
int mem_check_range(struct rxe_mem *mem, u64 iova, size_t length)
|
||
|
|
{
|
||
|
|
switch (mem->type) {
|
||
|
|
case RXE_MEM_TYPE_DMA:
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
case RXE_MEM_TYPE_MR:
|
||
|
|
case RXE_MEM_TYPE_FMR:
|
||
|
|
if (iova < mem->iova ||
|
||
|
|
length > mem->length ||
|
||
|
|
iova > mem->iova + mem->length - length)
|
||
|
|
return -EFAULT;
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#define IB_ACCESS_REMOTE (IB_ACCESS_REMOTE_READ \
|
||
|
|
| IB_ACCESS_REMOTE_WRITE \
|
||
|
|
| IB_ACCESS_REMOTE_ATOMIC)
|
||
|
|
|
||
|
|
static void rxe_mem_init(int access, struct rxe_mem *mem)
|
||
|
|
{
|
||
|
|
u32 lkey = mem->pelem.index << 8 | rxe_get_key();
|
||
|
|
u32 rkey = (access & IB_ACCESS_REMOTE) ? lkey : 0;
|
||
|
|
|
||
|
|
if (mem->pelem.pool->type == RXE_TYPE_MR) {
|
||
|
|
mem->ibmr.lkey = lkey;
|
||
|
|
mem->ibmr.rkey = rkey;
|
||
|
|
}
|
||
|
|
|
||
|
|
mem->lkey = lkey;
|
||
|
|
mem->rkey = rkey;
|
||
|
|
mem->state = RXE_MEM_STATE_INVALID;
|
||
|
|
mem->type = RXE_MEM_TYPE_NONE;
|
||
|
|
mem->map_shift = ilog2(RXE_BUF_PER_MAP);
|
||
|
|
}
|
||
|
|
|
||
|
|
void rxe_mem_cleanup(struct rxe_pool_entry *arg)
|
||
|
|
{
|
||
|
|
struct rxe_mem *mem = container_of(arg, typeof(*mem), pelem);
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (mem->umem)
|
||
|
|
ib_umem_release(mem->umem);
|
||
|
|
|
||
|
|
if (mem->map) {
|
||
|
|
for (i = 0; i < mem->num_map; i++)
|
||
|
|
kfree(mem->map[i]);
|
||
|
|
|
||
|
|
kfree(mem->map);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int rxe_mem_alloc(struct rxe_mem *mem, int num_buf)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
int num_map;
|
||
|
|
struct rxe_map **map = mem->map;
|
||
|
|
|
||
|
|
num_map = (num_buf + RXE_BUF_PER_MAP - 1) / RXE_BUF_PER_MAP;
|
||
|
|
|
||
|
|
mem->map = kmalloc_array(num_map, sizeof(*map), GFP_KERNEL);
|
||
|
|
if (!mem->map)
|
||
|
|
goto err1;
|
||
|
|
|
||
|
|
for (i = 0; i < num_map; i++) {
|
||
|
|
mem->map[i] = kmalloc(sizeof(**map), GFP_KERNEL);
|
||
|
|
if (!mem->map[i])
|
||
|
|
goto err2;
|
||
|
|
}
|
||
|
|
|
||
|
|
BUILD_BUG_ON(!is_power_of_2(RXE_BUF_PER_MAP));
|
||
|
|
|
||
|
|
mem->map_shift = ilog2(RXE_BUF_PER_MAP);
|
||
|
|
mem->map_mask = RXE_BUF_PER_MAP - 1;
|
||
|
|
|
||
|
|
mem->num_buf = num_buf;
|
||
|
|
mem->num_map = num_map;
|
||
|
|
mem->max_buf = num_map * RXE_BUF_PER_MAP;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err2:
|
||
|
|
for (i--; i >= 0; i--)
|
||
|
|
kfree(mem->map[i]);
|
||
|
|
|
||
|
|
kfree(mem->map);
|
||
|
|
err1:
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
int rxe_mem_init_dma(struct rxe_pd *pd,
|
||
|
|
int access, struct rxe_mem *mem)
|
||
|
|
{
|
||
|
|
rxe_mem_init(access, mem);
|
||
|
|
|
||
|
|
mem->pd = pd;
|
||
|
|
mem->access = access;
|
||
|
|
mem->state = RXE_MEM_STATE_VALID;
|
||
|
|
mem->type = RXE_MEM_TYPE_DMA;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int rxe_mem_init_user(struct rxe_pd *pd, u64 start,
|
||
|
|
u64 length, u64 iova, int access, struct ib_udata *udata,
|
||
|
|
struct rxe_mem *mem)
|
||
|
|
{
|
||
|
|
int entry;
|
||
|
|
struct rxe_map **map;
|
||
|
|
struct rxe_phys_buf *buf = NULL;
|
||
|
|
struct ib_umem *umem;
|
||
|
|
struct scatterlist *sg;
|
||
|
|
int num_buf;
|
||
|
|
void *vaddr;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
umem = ib_umem_get(pd->ibpd.uobject->context, start, length, access, 0);
|
||
|
|
if (IS_ERR(umem)) {
|
||
|
|
pr_warn("err %d from rxe_umem_get\n",
|
||
|
|
(int)PTR_ERR(umem));
|
||
|
|
err = -EINVAL;
|
||
|
|
goto err1;
|
||
|
|
}
|
||
|
|
|
||
|
|
mem->umem = umem;
|
||
|
|
num_buf = umem->nmap;
|
||
|
|
|
||
|
|
rxe_mem_init(access, mem);
|
||
|
|
|
||
|
|
err = rxe_mem_alloc(mem, num_buf);
|
||
|
|
if (err) {
|
||
|
|
pr_warn("err %d from rxe_mem_alloc\n", err);
|
||
|
|
ib_umem_release(umem);
|
||
|
|
goto err1;
|
||
|
|
}
|
||
|
|
|
||
|
|
mem->page_shift = umem->page_shift;
|
||
|
|
mem->page_mask = BIT(umem->page_shift) - 1;
|
||
|
|
|
||
|
|
num_buf = 0;
|
||
|
|
map = mem->map;
|
||
|
|
if (length > 0) {
|
||
|
|
buf = map[0]->buf;
|
||
|
|
|
||
|
|
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
|
||
|
|
vaddr = page_address(sg_page(sg));
|
||
|
|
if (!vaddr) {
|
||
|
|
pr_warn("null vaddr\n");
|
||
|
|
ib_umem_release(umem);
|
||
|
|
err = -ENOMEM;
|
||
|
|
goto err1;
|
||
|
|
}
|
||
|
|
|
||
|
|
buf->addr = (uintptr_t)vaddr;
|
||
|
|
buf->size = BIT(umem->page_shift);
|
||
|
|
num_buf++;
|
||
|
|
buf++;
|
||
|
|
|
||
|
|
if (num_buf >= RXE_BUF_PER_MAP) {
|
||
|
|
map++;
|
||
|
|
buf = map[0]->buf;
|
||
|
|
num_buf = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
mem->pd = pd;
|
||
|
|
mem->umem = umem;
|
||
|
|
mem->access = access;
|
||
|
|
mem->length = length;
|
||
|
|
mem->iova = iova;
|
||
|
|
mem->va = start;
|
||
|
|
mem->offset = ib_umem_offset(umem);
|
||
|
|
mem->state = RXE_MEM_STATE_VALID;
|
||
|
|
mem->type = RXE_MEM_TYPE_MR;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err1:
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
int rxe_mem_init_fast(struct rxe_pd *pd,
|
||
|
|
int max_pages, struct rxe_mem *mem)
|
||
|
|
{
|
||
|
|
int err;
|
||
|
|
|
||
|
|
rxe_mem_init(0, mem);
|
||
|
|
|
||
|
|
/* In fastreg, we also set the rkey */
|
||
|
|
mem->ibmr.rkey = mem->ibmr.lkey;
|
||
|
|
|
||
|
|
err = rxe_mem_alloc(mem, max_pages);
|
||
|
|
if (err)
|
||
|
|
goto err1;
|
||
|
|
|
||
|
|
mem->pd = pd;
|
||
|
|
mem->max_buf = max_pages;
|
||
|
|
mem->state = RXE_MEM_STATE_FREE;
|
||
|
|
mem->type = RXE_MEM_TYPE_MR;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err1:
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void lookup_iova(
|
||
|
|
struct rxe_mem *mem,
|
||
|
|
u64 iova,
|
||
|
|
int *m_out,
|
||
|
|
int *n_out,
|
||
|
|
size_t *offset_out)
|
||
|
|
{
|
||
|
|
size_t offset = iova - mem->iova + mem->offset;
|
||
|
|
int map_index;
|
||
|
|
int buf_index;
|
||
|
|
u64 length;
|
||
|
|
|
||
|
|
if (likely(mem->page_shift)) {
|
||
|
|
*offset_out = offset & mem->page_mask;
|
||
|
|
offset >>= mem->page_shift;
|
||
|
|
*n_out = offset & mem->map_mask;
|
||
|
|
*m_out = offset >> mem->map_shift;
|
||
|
|
} else {
|
||
|
|
map_index = 0;
|
||
|
|
buf_index = 0;
|
||
|
|
|
||
|
|
length = mem->map[map_index]->buf[buf_index].size;
|
||
|
|
|
||
|
|
while (offset >= length) {
|
||
|
|
offset -= length;
|
||
|
|
buf_index++;
|
||
|
|
|
||
|
|
if (buf_index == RXE_BUF_PER_MAP) {
|
||
|
|
map_index++;
|
||
|
|
buf_index = 0;
|
||
|
|
}
|
||
|
|
length = mem->map[map_index]->buf[buf_index].size;
|
||
|
|
}
|
||
|
|
|
||
|
|
*m_out = map_index;
|
||
|
|
*n_out = buf_index;
|
||
|
|
*offset_out = offset;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void *iova_to_vaddr(struct rxe_mem *mem, u64 iova, int length)
|
||
|
|
{
|
||
|
|
size_t offset;
|
||
|
|
int m, n;
|
||
|
|
void *addr;
|
||
|
|
|
||
|
|
if (mem->state != RXE_MEM_STATE_VALID) {
|
||
|
|
pr_warn("mem not in valid state\n");
|
||
|
|
addr = NULL;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!mem->map) {
|
||
|
|
addr = (void *)(uintptr_t)iova;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mem_check_range(mem, iova, length)) {
|
||
|
|
pr_warn("range violation\n");
|
||
|
|
addr = NULL;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
lookup_iova(mem, iova, &m, &n, &offset);
|
||
|
|
|
||
|
|
if (offset + length > mem->map[m]->buf[n].size) {
|
||
|
|
pr_warn("crosses page boundary\n");
|
||
|
|
addr = NULL;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
addr = (void *)(uintptr_t)mem->map[m]->buf[n].addr + offset;
|
||
|
|
|
||
|
|
out:
|
||
|
|
return addr;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* copy data from a range (vaddr, vaddr+length-1) to or from
|
||
|
|
* a mem object starting at iova. Compute incremental value of
|
||
|
|
* crc32 if crcp is not zero. caller must hold a reference to mem
|
||
|
|
*/
|
||
|
|
int rxe_mem_copy(struct rxe_mem *mem, u64 iova, void *addr, int length,
|
||
|
|
enum copy_direction dir, u32 *crcp)
|
||
|
|
{
|
||
|
|
int err;
|
||
|
|
int bytes;
|
||
|
|
u8 *va;
|
||
|
|
struct rxe_map **map;
|
||
|
|
struct rxe_phys_buf *buf;
|
||
|
|
int m;
|
||
|
|
int i;
|
||
|
|
size_t offset;
|
||
|
|
u32 crc = crcp ? (*crcp) : 0;
|
||
|
|
|
||
|
|
if (length == 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (mem->type == RXE_MEM_TYPE_DMA) {
|
||
|
|
u8 *src, *dest;
|
||
|
|
|
||
|
|
src = (dir == to_mem_obj) ?
|
||
|
|
addr : ((void *)(uintptr_t)iova);
|
||
|
|
|
||
|
|
dest = (dir == to_mem_obj) ?
|
||
|
|
((void *)(uintptr_t)iova) : addr;
|
||
|
|
|
||
|
|
memcpy(dest, src, length);
|
||
|
|
|
||
|
|
if (crcp)
|
||
|
|
*crcp = rxe_crc32(to_rdev(mem->pd->ibpd.device),
|
||
|
|
*crcp, dest, length);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
WARN_ON_ONCE(!mem->map);
|
||
|
|
|
||
|
|
err = mem_check_range(mem, iova, length);
|
||
|
|
if (err) {
|
||
|
|
err = -EFAULT;
|
||
|
|
goto err1;
|
||
|
|
}
|
||
|
|
|
||
|
|
lookup_iova(mem, iova, &m, &i, &offset);
|
||
|
|
|
||
|
|
map = mem->map + m;
|
||
|
|
buf = map[0]->buf + i;
|
||
|
|
|
||
|
|
while (length > 0) {
|
||
|
|
u8 *src, *dest;
|
||
|
|
|
||
|
|
va = (u8 *)(uintptr_t)buf->addr + offset;
|
||
|
|
src = (dir == to_mem_obj) ? addr : va;
|
||
|
|
dest = (dir == to_mem_obj) ? va : addr;
|
||
|
|
|
||
|
|
bytes = buf->size - offset;
|
||
|
|
|
||
|
|
if (bytes > length)
|
||
|
|
bytes = length;
|
||
|
|
|
||
|
|
memcpy(dest, src, bytes);
|
||
|
|
|
||
|
|
if (crcp)
|
||
|
|
crc = rxe_crc32(to_rdev(mem->pd->ibpd.device),
|
||
|
|
crc, dest, bytes);
|
||
|
|
|
||
|
|
length -= bytes;
|
||
|
|
addr += bytes;
|
||
|
|
|
||
|
|
offset = 0;
|
||
|
|
buf++;
|
||
|
|
i++;
|
||
|
|
|
||
|
|
if (i == RXE_BUF_PER_MAP) {
|
||
|
|
i = 0;
|
||
|
|
map++;
|
||
|
|
buf = map[0]->buf;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (crcp)
|
||
|
|
*crcp = crc;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err1:
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* copy data in or out of a wqe, i.e. sg list
|
||
|
|
* under the control of a dma descriptor
|
||
|
|
*/
|
||
|
|
int copy_data(
|
||
|
|
struct rxe_pd *pd,
|
||
|
|
int access,
|
||
|
|
struct rxe_dma_info *dma,
|
||
|
|
void *addr,
|
||
|
|
int length,
|
||
|
|
enum copy_direction dir,
|
||
|
|
u32 *crcp)
|
||
|
|
{
|
||
|
|
int bytes;
|
||
|
|
struct rxe_sge *sge = &dma->sge[dma->cur_sge];
|
||
|
|
int offset = dma->sge_offset;
|
||
|
|
int resid = dma->resid;
|
||
|
|
struct rxe_mem *mem = NULL;
|
||
|
|
u64 iova;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if (length == 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (length > resid) {
|
||
|
|
err = -EINVAL;
|
||
|
|
goto err2;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (sge->length && (offset < sge->length)) {
|
||
|
|
mem = lookup_mem(pd, access, sge->lkey, lookup_local);
|
||
|
|
if (!mem) {
|
||
|
|
err = -EINVAL;
|
||
|
|
goto err1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
while (length > 0) {
|
||
|
|
bytes = length;
|
||
|
|
|
||
|
|
if (offset >= sge->length) {
|
||
|
|
if (mem) {
|
||
|
|
rxe_drop_ref(mem);
|
||
|
|
mem = NULL;
|
||
|
|
}
|
||
|
|
sge++;
|
||
|
|
dma->cur_sge++;
|
||
|
|
offset = 0;
|
||
|
|
|
||
|
|
if (dma->cur_sge >= dma->num_sge) {
|
||
|
|
err = -ENOSPC;
|
||
|
|
goto err2;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (sge->length) {
|
||
|
|
mem = lookup_mem(pd, access, sge->lkey,
|
||
|
|
lookup_local);
|
||
|
|
if (!mem) {
|
||
|
|
err = -EINVAL;
|
||
|
|
goto err1;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (bytes > sge->length - offset)
|
||
|
|
bytes = sge->length - offset;
|
||
|
|
|
||
|
|
if (bytes > 0) {
|
||
|
|
iova = sge->addr + offset;
|
||
|
|
|
||
|
|
err = rxe_mem_copy(mem, iova, addr, bytes, dir, crcp);
|
||
|
|
if (err)
|
||
|
|
goto err2;
|
||
|
|
|
||
|
|
offset += bytes;
|
||
|
|
resid -= bytes;
|
||
|
|
length -= bytes;
|
||
|
|
addr += bytes;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
dma->sge_offset = offset;
|
||
|
|
dma->resid = resid;
|
||
|
|
|
||
|
|
if (mem)
|
||
|
|
rxe_drop_ref(mem);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err2:
|
||
|
|
if (mem)
|
||
|
|
rxe_drop_ref(mem);
|
||
|
|
err1:
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
int advance_dma_data(struct rxe_dma_info *dma, unsigned int length)
|
||
|
|
{
|
||
|
|
struct rxe_sge *sge = &dma->sge[dma->cur_sge];
|
||
|
|
int offset = dma->sge_offset;
|
||
|
|
int resid = dma->resid;
|
||
|
|
|
||
|
|
while (length) {
|
||
|
|
unsigned int bytes;
|
||
|
|
|
||
|
|
if (offset >= sge->length) {
|
||
|
|
sge++;
|
||
|
|
dma->cur_sge++;
|
||
|
|
offset = 0;
|
||
|
|
if (dma->cur_sge >= dma->num_sge)
|
||
|
|
return -ENOSPC;
|
||
|
|
}
|
||
|
|
|
||
|
|
bytes = length;
|
||
|
|
|
||
|
|
if (bytes > sge->length - offset)
|
||
|
|
bytes = sge->length - offset;
|
||
|
|
|
||
|
|
offset += bytes;
|
||
|
|
resid -= bytes;
|
||
|
|
length -= bytes;
|
||
|
|
}
|
||
|
|
|
||
|
|
dma->sge_offset = offset;
|
||
|
|
dma->resid = resid;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* (1) find the mem (mr or mw) corresponding to lkey/rkey
|
||
|
|
* depending on lookup_type
|
||
|
|
* (2) verify that the (qp) pd matches the mem pd
|
||
|
|
* (3) verify that the mem can support the requested access
|
||
|
|
* (4) verify that mem state is valid
|
||
|
|
*/
|
||
|
|
struct rxe_mem *lookup_mem(struct rxe_pd *pd, int access, u32 key,
|
||
|
|
enum lookup_type type)
|
||
|
|
{
|
||
|
|
struct rxe_mem *mem;
|
||
|
|
struct rxe_dev *rxe = to_rdev(pd->ibpd.device);
|
||
|
|
int index = key >> 8;
|
||
|
|
|
||
|
|
if (index >= RXE_MIN_MR_INDEX && index <= RXE_MAX_MR_INDEX) {
|
||
|
|
mem = rxe_pool_get_index(&rxe->mr_pool, index);
|
||
|
|
if (!mem)
|
||
|
|
goto err1;
|
||
|
|
} else {
|
||
|
|
goto err1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((type == lookup_local && mem->lkey != key) ||
|
||
|
|
(type == lookup_remote && mem->rkey != key))
|
||
|
|
goto err2;
|
||
|
|
|
||
|
|
if (mem->pd != pd)
|
||
|
|
goto err2;
|
||
|
|
|
||
|
|
if (access && !(access & mem->access))
|
||
|
|
goto err2;
|
||
|
|
|
||
|
|
if (mem->state != RXE_MEM_STATE_VALID)
|
||
|
|
goto err2;
|
||
|
|
|
||
|
|
return mem;
|
||
|
|
|
||
|
|
err2:
|
||
|
|
rxe_drop_ref(mem);
|
||
|
|
err1:
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
int rxe_mem_map_pages(struct rxe_dev *rxe, struct rxe_mem *mem,
|
||
|
|
u64 *page, int num_pages, u64 iova)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
int num_buf;
|
||
|
|
int err;
|
||
|
|
struct rxe_map **map;
|
||
|
|
struct rxe_phys_buf *buf;
|
||
|
|
int page_size;
|
||
|
|
|
||
|
|
if (num_pages > mem->max_buf) {
|
||
|
|
err = -EINVAL;
|
||
|
|
goto err1;
|
||
|
|
}
|
||
|
|
|
||
|
|
num_buf = 0;
|
||
|
|
page_size = 1 << mem->page_shift;
|
||
|
|
map = mem->map;
|
||
|
|
buf = map[0]->buf;
|
||
|
|
|
||
|
|
for (i = 0; i < num_pages; i++) {
|
||
|
|
buf->addr = *page++;
|
||
|
|
buf->size = page_size;
|
||
|
|
buf++;
|
||
|
|
num_buf++;
|
||
|
|
|
||
|
|
if (num_buf == RXE_BUF_PER_MAP) {
|
||
|
|
map++;
|
||
|
|
buf = map[0]->buf;
|
||
|
|
num_buf = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
mem->iova = iova;
|
||
|
|
mem->va = iova;
|
||
|
|
mem->length = num_pages << mem->page_shift;
|
||
|
|
mem->state = RXE_MEM_STATE_VALID;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err1:
|
||
|
|
return err;
|
||
|
|
}
|