533 lines
12 KiB
C
533 lines
12 KiB
C
/*
|
|
* Copyright (c) 2006, 2007, 2008, 2009 QLogic Corporation. All rights reserved.
|
|
* Copyright (c) 2005, 2006 PathScale, 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 <rdma/ib_umem.h>
|
|
#include <rdma/ib_smi.h>
|
|
|
|
#include "qib.h"
|
|
|
|
/* Fast memory region */
|
|
struct qib_fmr {
|
|
struct ib_fmr ibfmr;
|
|
struct qib_mregion mr; /* must be last */
|
|
};
|
|
|
|
static inline struct qib_fmr *to_ifmr(struct ib_fmr *ibfmr)
|
|
{
|
|
return container_of(ibfmr, struct qib_fmr, ibfmr);
|
|
}
|
|
|
|
static int init_qib_mregion(struct qib_mregion *mr, struct ib_pd *pd,
|
|
int count)
|
|
{
|
|
int m, i = 0;
|
|
int rval = 0;
|
|
|
|
m = (count + QIB_SEGSZ - 1) / QIB_SEGSZ;
|
|
for (; i < m; i++) {
|
|
mr->map[i] = kzalloc(sizeof *mr->map[0], GFP_KERNEL);
|
|
if (!mr->map[i])
|
|
goto bail;
|
|
}
|
|
mr->mapsz = m;
|
|
init_completion(&mr->comp);
|
|
/* count returning the ptr to user */
|
|
atomic_set(&mr->refcount, 1);
|
|
mr->pd = pd;
|
|
mr->max_segs = count;
|
|
out:
|
|
return rval;
|
|
bail:
|
|
while (i)
|
|
kfree(mr->map[--i]);
|
|
rval = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
static void deinit_qib_mregion(struct qib_mregion *mr)
|
|
{
|
|
int i = mr->mapsz;
|
|
|
|
mr->mapsz = 0;
|
|
while (i)
|
|
kfree(mr->map[--i]);
|
|
}
|
|
|
|
|
|
/**
|
|
* qib_get_dma_mr - get a DMA memory region
|
|
* @pd: protection domain for this memory region
|
|
* @acc: access flags
|
|
*
|
|
* Returns the memory region on success, otherwise returns an errno.
|
|
* Note that all DMA addresses should be created via the
|
|
* struct ib_dma_mapping_ops functions (see qib_dma.c).
|
|
*/
|
|
struct ib_mr *qib_get_dma_mr(struct ib_pd *pd, int acc)
|
|
{
|
|
struct qib_mr *mr = NULL;
|
|
struct ib_mr *ret;
|
|
int rval;
|
|
|
|
if (to_ipd(pd)->user) {
|
|
ret = ERR_PTR(-EPERM);
|
|
goto bail;
|
|
}
|
|
|
|
mr = kzalloc(sizeof *mr, GFP_KERNEL);
|
|
if (!mr) {
|
|
ret = ERR_PTR(-ENOMEM);
|
|
goto bail;
|
|
}
|
|
|
|
rval = init_qib_mregion(&mr->mr, pd, 0);
|
|
if (rval) {
|
|
ret = ERR_PTR(rval);
|
|
goto bail;
|
|
}
|
|
|
|
|
|
rval = qib_alloc_lkey(&mr->mr, 1);
|
|
if (rval) {
|
|
ret = ERR_PTR(rval);
|
|
goto bail_mregion;
|
|
}
|
|
|
|
mr->mr.access_flags = acc;
|
|
ret = &mr->ibmr;
|
|
done:
|
|
return ret;
|
|
|
|
bail_mregion:
|
|
deinit_qib_mregion(&mr->mr);
|
|
bail:
|
|
kfree(mr);
|
|
goto done;
|
|
}
|
|
|
|
static struct qib_mr *alloc_mr(int count, struct ib_pd *pd)
|
|
{
|
|
struct qib_mr *mr;
|
|
int rval = -ENOMEM;
|
|
int m;
|
|
|
|
/* Allocate struct plus pointers to first level page tables. */
|
|
m = (count + QIB_SEGSZ - 1) / QIB_SEGSZ;
|
|
mr = kzalloc(sizeof *mr + m * sizeof mr->mr.map[0], GFP_KERNEL);
|
|
if (!mr)
|
|
goto bail;
|
|
|
|
rval = init_qib_mregion(&mr->mr, pd, count);
|
|
if (rval)
|
|
goto bail;
|
|
/*
|
|
* ib_reg_phys_mr() will initialize mr->ibmr except for
|
|
* lkey and rkey.
|
|
*/
|
|
rval = qib_alloc_lkey(&mr->mr, 0);
|
|
if (rval)
|
|
goto bail_mregion;
|
|
mr->ibmr.lkey = mr->mr.lkey;
|
|
mr->ibmr.rkey = mr->mr.lkey;
|
|
done:
|
|
return mr;
|
|
|
|
bail_mregion:
|
|
deinit_qib_mregion(&mr->mr);
|
|
bail:
|
|
kfree(mr);
|
|
mr = ERR_PTR(rval);
|
|
goto done;
|
|
}
|
|
|
|
/**
|
|
* qib_reg_phys_mr - register a physical memory region
|
|
* @pd: protection domain for this memory region
|
|
* @buffer_list: pointer to the list of physical buffers to register
|
|
* @num_phys_buf: the number of physical buffers to register
|
|
* @iova_start: the starting address passed over IB which maps to this MR
|
|
*
|
|
* Returns the memory region on success, otherwise returns an errno.
|
|
*/
|
|
struct ib_mr *qib_reg_phys_mr(struct ib_pd *pd,
|
|
struct ib_phys_buf *buffer_list,
|
|
int num_phys_buf, int acc, u64 *iova_start)
|
|
{
|
|
struct qib_mr *mr;
|
|
int n, m, i;
|
|
struct ib_mr *ret;
|
|
|
|
mr = alloc_mr(num_phys_buf, pd);
|
|
if (IS_ERR(mr)) {
|
|
ret = (struct ib_mr *)mr;
|
|
goto bail;
|
|
}
|
|
|
|
mr->mr.user_base = *iova_start;
|
|
mr->mr.iova = *iova_start;
|
|
mr->mr.access_flags = acc;
|
|
|
|
m = 0;
|
|
n = 0;
|
|
for (i = 0; i < num_phys_buf; i++) {
|
|
mr->mr.map[m]->segs[n].vaddr = (void *) buffer_list[i].addr;
|
|
mr->mr.map[m]->segs[n].length = buffer_list[i].size;
|
|
mr->mr.length += buffer_list[i].size;
|
|
n++;
|
|
if (n == QIB_SEGSZ) {
|
|
m++;
|
|
n = 0;
|
|
}
|
|
}
|
|
|
|
ret = &mr->ibmr;
|
|
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* qib_reg_user_mr - register a userspace memory region
|
|
* @pd: protection domain for this memory region
|
|
* @start: starting userspace address
|
|
* @length: length of region to register
|
|
* @mr_access_flags: access flags for this memory region
|
|
* @udata: unused by the QLogic_IB driver
|
|
*
|
|
* Returns the memory region on success, otherwise returns an errno.
|
|
*/
|
|
struct ib_mr *qib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
|
|
u64 virt_addr, int mr_access_flags,
|
|
struct ib_udata *udata)
|
|
{
|
|
struct qib_mr *mr;
|
|
struct ib_umem *umem;
|
|
struct scatterlist *sg;
|
|
int n, m, entry;
|
|
struct ib_mr *ret;
|
|
|
|
if (length == 0) {
|
|
ret = ERR_PTR(-EINVAL);
|
|
goto bail;
|
|
}
|
|
|
|
umem = ib_umem_get(pd->uobject->context, start, length,
|
|
mr_access_flags, 0);
|
|
if (IS_ERR(umem))
|
|
return (void *) umem;
|
|
|
|
n = umem->nmap;
|
|
|
|
mr = alloc_mr(n, pd);
|
|
if (IS_ERR(mr)) {
|
|
ret = (struct ib_mr *)mr;
|
|
ib_umem_release(umem);
|
|
goto bail;
|
|
}
|
|
|
|
mr->mr.user_base = start;
|
|
mr->mr.iova = virt_addr;
|
|
mr->mr.length = length;
|
|
mr->mr.offset = ib_umem_offset(umem);
|
|
mr->mr.access_flags = mr_access_flags;
|
|
mr->umem = umem;
|
|
|
|
if (is_power_of_2(umem->page_size))
|
|
mr->mr.page_shift = ilog2(umem->page_size);
|
|
m = 0;
|
|
n = 0;
|
|
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
|
|
void *vaddr;
|
|
|
|
vaddr = page_address(sg_page(sg));
|
|
if (!vaddr) {
|
|
ret = ERR_PTR(-EINVAL);
|
|
goto bail;
|
|
}
|
|
mr->mr.map[m]->segs[n].vaddr = vaddr;
|
|
mr->mr.map[m]->segs[n].length = umem->page_size;
|
|
n++;
|
|
if (n == QIB_SEGSZ) {
|
|
m++;
|
|
n = 0;
|
|
}
|
|
}
|
|
ret = &mr->ibmr;
|
|
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* qib_dereg_mr - unregister and free a memory region
|
|
* @ibmr: the memory region to free
|
|
*
|
|
* Returns 0 on success.
|
|
*
|
|
* Note that this is called to free MRs created by qib_get_dma_mr()
|
|
* or qib_reg_user_mr().
|
|
*/
|
|
int qib_dereg_mr(struct ib_mr *ibmr)
|
|
{
|
|
struct qib_mr *mr = to_imr(ibmr);
|
|
int ret = 0;
|
|
unsigned long timeout;
|
|
|
|
qib_free_lkey(&mr->mr);
|
|
|
|
qib_put_mr(&mr->mr); /* will set completion if last */
|
|
timeout = wait_for_completion_timeout(&mr->mr.comp,
|
|
5 * HZ);
|
|
if (!timeout) {
|
|
qib_get_mr(&mr->mr);
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
deinit_qib_mregion(&mr->mr);
|
|
if (mr->umem)
|
|
ib_umem_release(mr->umem);
|
|
kfree(mr);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Allocate a memory region usable with the
|
|
* IB_WR_FAST_REG_MR send work request.
|
|
*
|
|
* Return the memory region on success, otherwise return an errno.
|
|
*/
|
|
struct ib_mr *qib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len)
|
|
{
|
|
struct qib_mr *mr;
|
|
|
|
mr = alloc_mr(max_page_list_len, pd);
|
|
if (IS_ERR(mr))
|
|
return (struct ib_mr *)mr;
|
|
|
|
return &mr->ibmr;
|
|
}
|
|
|
|
struct ib_fast_reg_page_list *
|
|
qib_alloc_fast_reg_page_list(struct ib_device *ibdev, int page_list_len)
|
|
{
|
|
unsigned size = page_list_len * sizeof(u64);
|
|
struct ib_fast_reg_page_list *pl;
|
|
|
|
if (size > PAGE_SIZE)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
pl = kzalloc(sizeof *pl, GFP_KERNEL);
|
|
if (!pl)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
pl->page_list = kzalloc(size, GFP_KERNEL);
|
|
if (!pl->page_list)
|
|
goto err_free;
|
|
|
|
return pl;
|
|
|
|
err_free:
|
|
kfree(pl);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
void qib_free_fast_reg_page_list(struct ib_fast_reg_page_list *pl)
|
|
{
|
|
kfree(pl->page_list);
|
|
kfree(pl);
|
|
}
|
|
|
|
/**
|
|
* qib_alloc_fmr - allocate a fast memory region
|
|
* @pd: the protection domain for this memory region
|
|
* @mr_access_flags: access flags for this memory region
|
|
* @fmr_attr: fast memory region attributes
|
|
*
|
|
* Returns the memory region on success, otherwise returns an errno.
|
|
*/
|
|
struct ib_fmr *qib_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
|
|
struct ib_fmr_attr *fmr_attr)
|
|
{
|
|
struct qib_fmr *fmr;
|
|
int m;
|
|
struct ib_fmr *ret;
|
|
int rval = -ENOMEM;
|
|
|
|
/* Allocate struct plus pointers to first level page tables. */
|
|
m = (fmr_attr->max_pages + QIB_SEGSZ - 1) / QIB_SEGSZ;
|
|
fmr = kzalloc(sizeof *fmr + m * sizeof fmr->mr.map[0], GFP_KERNEL);
|
|
if (!fmr)
|
|
goto bail;
|
|
|
|
rval = init_qib_mregion(&fmr->mr, pd, fmr_attr->max_pages);
|
|
if (rval)
|
|
goto bail;
|
|
|
|
/*
|
|
* ib_alloc_fmr() will initialize fmr->ibfmr except for lkey &
|
|
* rkey.
|
|
*/
|
|
rval = qib_alloc_lkey(&fmr->mr, 0);
|
|
if (rval)
|
|
goto bail_mregion;
|
|
fmr->ibfmr.rkey = fmr->mr.lkey;
|
|
fmr->ibfmr.lkey = fmr->mr.lkey;
|
|
/*
|
|
* Resources are allocated but no valid mapping (RKEY can't be
|
|
* used).
|
|
*/
|
|
fmr->mr.access_flags = mr_access_flags;
|
|
fmr->mr.max_segs = fmr_attr->max_pages;
|
|
fmr->mr.page_shift = fmr_attr->page_shift;
|
|
|
|
ret = &fmr->ibfmr;
|
|
done:
|
|
return ret;
|
|
|
|
bail_mregion:
|
|
deinit_qib_mregion(&fmr->mr);
|
|
bail:
|
|
kfree(fmr);
|
|
ret = ERR_PTR(rval);
|
|
goto done;
|
|
}
|
|
|
|
/**
|
|
* qib_map_phys_fmr - set up a fast memory region
|
|
* @ibmfr: the fast memory region to set up
|
|
* @page_list: the list of pages to associate with the fast memory region
|
|
* @list_len: the number of pages to associate with the fast memory region
|
|
* @iova: the virtual address of the start of the fast memory region
|
|
*
|
|
* This may be called from interrupt context.
|
|
*/
|
|
|
|
int qib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
|
|
int list_len, u64 iova)
|
|
{
|
|
struct qib_fmr *fmr = to_ifmr(ibfmr);
|
|
struct qib_lkey_table *rkt;
|
|
unsigned long flags;
|
|
int m, n, i;
|
|
u32 ps;
|
|
int ret;
|
|
|
|
i = atomic_read(&fmr->mr.refcount);
|
|
if (i > 2)
|
|
return -EBUSY;
|
|
|
|
if (list_len > fmr->mr.max_segs) {
|
|
ret = -EINVAL;
|
|
goto bail;
|
|
}
|
|
rkt = &to_idev(ibfmr->device)->lk_table;
|
|
spin_lock_irqsave(&rkt->lock, flags);
|
|
fmr->mr.user_base = iova;
|
|
fmr->mr.iova = iova;
|
|
ps = 1 << fmr->mr.page_shift;
|
|
fmr->mr.length = list_len * ps;
|
|
m = 0;
|
|
n = 0;
|
|
for (i = 0; i < list_len; i++) {
|
|
fmr->mr.map[m]->segs[n].vaddr = (void *) page_list[i];
|
|
fmr->mr.map[m]->segs[n].length = ps;
|
|
if (++n == QIB_SEGSZ) {
|
|
m++;
|
|
n = 0;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&rkt->lock, flags);
|
|
ret = 0;
|
|
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* qib_unmap_fmr - unmap fast memory regions
|
|
* @fmr_list: the list of fast memory regions to unmap
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int qib_unmap_fmr(struct list_head *fmr_list)
|
|
{
|
|
struct qib_fmr *fmr;
|
|
struct qib_lkey_table *rkt;
|
|
unsigned long flags;
|
|
|
|
list_for_each_entry(fmr, fmr_list, ibfmr.list) {
|
|
rkt = &to_idev(fmr->ibfmr.device)->lk_table;
|
|
spin_lock_irqsave(&rkt->lock, flags);
|
|
fmr->mr.user_base = 0;
|
|
fmr->mr.iova = 0;
|
|
fmr->mr.length = 0;
|
|
spin_unlock_irqrestore(&rkt->lock, flags);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* qib_dealloc_fmr - deallocate a fast memory region
|
|
* @ibfmr: the fast memory region to deallocate
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int qib_dealloc_fmr(struct ib_fmr *ibfmr)
|
|
{
|
|
struct qib_fmr *fmr = to_ifmr(ibfmr);
|
|
int ret = 0;
|
|
unsigned long timeout;
|
|
|
|
qib_free_lkey(&fmr->mr);
|
|
qib_put_mr(&fmr->mr); /* will set completion if last */
|
|
timeout = wait_for_completion_timeout(&fmr->mr.comp,
|
|
5 * HZ);
|
|
if (!timeout) {
|
|
qib_get_mr(&fmr->mr);
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
deinit_qib_mregion(&fmr->mr);
|
|
kfree(fmr);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
void mr_rcu_callback(struct rcu_head *list)
|
|
{
|
|
struct qib_mregion *mr = container_of(list, struct qib_mregion, list);
|
|
|
|
complete(&mr->comp);
|
|
}
|