IB/qib: remove qib_keys.c
qib_keys.c was left uncompilable in commit 7c2e11fe2d ("IB/qib: Remove qp and mr functionality from qib")
Since nothing need it, remove it from tree.
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Corentin Labbe
Jason Gunthorpe
parent
57ac30c0ef
commit
3356c8c0b8
@ -1,235 +0,0 @@
|
|||||||
/*
|
|
||||||
* Copyright (c) 2006, 2007, 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 "qib.h"
|
|
||||||
|
|
||||||
/**
|
|
||||||
* qib_alloc_lkey - allocate an lkey
|
|
||||||
* @mr: memory region that this lkey protects
|
|
||||||
* @dma_region: 0->normal key, 1->restricted DMA key
|
|
||||||
*
|
|
||||||
* Returns 0 if successful, otherwise returns -errno.
|
|
||||||
*
|
|
||||||
* Increments mr reference count as required.
|
|
||||||
*
|
|
||||||
* Sets the lkey field mr for non-dma regions.
|
|
||||||
*
|
|
||||||
*/
|
|
||||||
|
|
||||||
int qib_alloc_lkey(struct rvt_mregion *mr, int dma_region)
|
|
||||||
{
|
|
||||||
unsigned long flags;
|
|
||||||
u32 r;
|
|
||||||
u32 n;
|
|
||||||
int ret = 0;
|
|
||||||
struct qib_ibdev *dev = to_idev(mr->pd->device);
|
|
||||||
struct rvt_lkey_table *rkt = &dev->lk_table;
|
|
||||||
|
|
||||||
spin_lock_irqsave(&rkt->lock, flags);
|
|
||||||
|
|
||||||
/* special case for dma_mr lkey == 0 */
|
|
||||||
if (dma_region) {
|
|
||||||
struct rvt_mregion *tmr;
|
|
||||||
|
|
||||||
tmr = rcu_access_pointer(dev->dma_mr);
|
|
||||||
if (!tmr) {
|
|
||||||
qib_get_mr(mr);
|
|
||||||
rcu_assign_pointer(dev->dma_mr, mr);
|
|
||||||
mr->lkey_published = 1;
|
|
||||||
}
|
|
||||||
goto success;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Find the next available LKEY */
|
|
||||||
r = rkt->next;
|
|
||||||
n = r;
|
|
||||||
for (;;) {
|
|
||||||
if (rkt->table[r] == NULL)
|
|
||||||
break;
|
|
||||||
r = (r + 1) & (rkt->max - 1);
|
|
||||||
if (r == n)
|
|
||||||
goto bail;
|
|
||||||
}
|
|
||||||
rkt->next = (r + 1) & (rkt->max - 1);
|
|
||||||
/*
|
|
||||||
* Make sure lkey is never zero which is reserved to indicate an
|
|
||||||
* unrestricted LKEY.
|
|
||||||
*/
|
|
||||||
rkt->gen++;
|
|
||||||
/*
|
|
||||||
* bits are capped in qib_verbs.c to insure enough bits
|
|
||||||
* for generation number
|
|
||||||
*/
|
|
||||||
mr->lkey = (r << (32 - ib_rvt_lkey_table_size)) |
|
|
||||||
((((1 << (24 - ib_rvt_lkey_table_size)) - 1) & rkt->gen)
|
|
||||||
<< 8);
|
|
||||||
if (mr->lkey == 0) {
|
|
||||||
mr->lkey |= 1 << 8;
|
|
||||||
rkt->gen++;
|
|
||||||
}
|
|
||||||
qib_get_mr(mr);
|
|
||||||
rcu_assign_pointer(rkt->table[r], mr);
|
|
||||||
mr->lkey_published = 1;
|
|
||||||
success:
|
|
||||||
spin_unlock_irqrestore(&rkt->lock, flags);
|
|
||||||
out:
|
|
||||||
return ret;
|
|
||||||
bail:
|
|
||||||
spin_unlock_irqrestore(&rkt->lock, flags);
|
|
||||||
ret = -ENOMEM;
|
|
||||||
goto out;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* qib_free_lkey - free an lkey
|
|
||||||
* @mr: mr to free from tables
|
|
||||||
*/
|
|
||||||
void qib_free_lkey(struct rvt_mregion *mr)
|
|
||||||
{
|
|
||||||
unsigned long flags;
|
|
||||||
u32 lkey = mr->lkey;
|
|
||||||
u32 r;
|
|
||||||
struct qib_ibdev *dev = to_idev(mr->pd->device);
|
|
||||||
struct rvt_lkey_table *rkt = &dev->lk_table;
|
|
||||||
|
|
||||||
spin_lock_irqsave(&rkt->lock, flags);
|
|
||||||
if (!mr->lkey_published)
|
|
||||||
goto out;
|
|
||||||
if (lkey == 0)
|
|
||||||
RCU_INIT_POINTER(dev->dma_mr, NULL);
|
|
||||||
else {
|
|
||||||
r = lkey >> (32 - ib_rvt_lkey_table_size);
|
|
||||||
RCU_INIT_POINTER(rkt->table[r], NULL);
|
|
||||||
}
|
|
||||||
qib_put_mr(mr);
|
|
||||||
mr->lkey_published = 0;
|
|
||||||
out:
|
|
||||||
spin_unlock_irqrestore(&rkt->lock, flags);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* qib_rkey_ok - check the IB virtual address, length, and RKEY
|
|
||||||
* @qp: qp for validation
|
|
||||||
* @sge: SGE state
|
|
||||||
* @len: length of data
|
|
||||||
* @vaddr: virtual address to place data
|
|
||||||
* @rkey: rkey to check
|
|
||||||
* @acc: access flags
|
|
||||||
*
|
|
||||||
* Return 1 if successful, otherwise 0.
|
|
||||||
*
|
|
||||||
* increments the reference count upon success
|
|
||||||
*/
|
|
||||||
int qib_rkey_ok(struct rvt_qp *qp, struct rvt_sge *sge,
|
|
||||||
u32 len, u64 vaddr, u32 rkey, int acc)
|
|
||||||
{
|
|
||||||
struct rvt_lkey_table *rkt = &to_idev(qp->ibqp.device)->lk_table;
|
|
||||||
struct rvt_mregion *mr;
|
|
||||||
unsigned n, m;
|
|
||||||
size_t off;
|
|
||||||
|
|
||||||
/* We use RKEY == zero for kernel virtual addresses */
|
|
||||||
rcu_read_lock();
|
|
||||||
if (rkey == 0) {
|
|
||||||
struct rvt_pd *pd = ibpd_to_rvtpd(qp->ibqp.pd);
|
|
||||||
struct qib_ibdev *dev = to_idev(pd->ibpd.device);
|
|
||||||
|
|
||||||
if (pd->user)
|
|
||||||
goto bail;
|
|
||||||
mr = rcu_dereference(dev->dma_mr);
|
|
||||||
if (!mr)
|
|
||||||
goto bail;
|
|
||||||
if (unlikely(!atomic_inc_not_zero(&mr->refcount)))
|
|
||||||
goto bail;
|
|
||||||
rcu_read_unlock();
|
|
||||||
|
|
||||||
sge->mr = mr;
|
|
||||||
sge->vaddr = (void *) vaddr;
|
|
||||||
sge->length = len;
|
|
||||||
sge->sge_length = len;
|
|
||||||
sge->m = 0;
|
|
||||||
sge->n = 0;
|
|
||||||
goto ok;
|
|
||||||
}
|
|
||||||
|
|
||||||
mr = rcu_dereference(
|
|
||||||
rkt->table[(rkey >> (32 - ib_rvt_lkey_table_size))]);
|
|
||||||
if (unlikely(!mr || mr->lkey != rkey || qp->ibqp.pd != mr->pd))
|
|
||||||
goto bail;
|
|
||||||
|
|
||||||
off = vaddr - mr->iova;
|
|
||||||
if (unlikely(vaddr < mr->iova || off + len > mr->length ||
|
|
||||||
(mr->access_flags & acc) == 0))
|
|
||||||
goto bail;
|
|
||||||
if (unlikely(!atomic_inc_not_zero(&mr->refcount)))
|
|
||||||
goto bail;
|
|
||||||
rcu_read_unlock();
|
|
||||||
|
|
||||||
off += mr->offset;
|
|
||||||
if (mr->page_shift) {
|
|
||||||
/*
|
|
||||||
page sizes are uniform power of 2 so no loop is necessary
|
|
||||||
entries_spanned_by_off is the number of times the loop below
|
|
||||||
would have executed.
|
|
||||||
*/
|
|
||||||
size_t entries_spanned_by_off;
|
|
||||||
|
|
||||||
entries_spanned_by_off = off >> mr->page_shift;
|
|
||||||
off -= (entries_spanned_by_off << mr->page_shift);
|
|
||||||
m = entries_spanned_by_off / RVT_SEGSZ;
|
|
||||||
n = entries_spanned_by_off % RVT_SEGSZ;
|
|
||||||
} else {
|
|
||||||
m = 0;
|
|
||||||
n = 0;
|
|
||||||
while (off >= mr->map[m]->segs[n].length) {
|
|
||||||
off -= mr->map[m]->segs[n].length;
|
|
||||||
n++;
|
|
||||||
if (n >= RVT_SEGSZ) {
|
|
||||||
m++;
|
|
||||||
n = 0;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
sge->mr = mr;
|
|
||||||
sge->vaddr = mr->map[m]->segs[n].vaddr + off;
|
|
||||||
sge->length = mr->map[m]->segs[n].length - off;
|
|
||||||
sge->sge_length = len;
|
|
||||||
sge->m = m;
|
|
||||||
sge->n = n;
|
|
||||||
ok:
|
|
||||||
return 1;
|
|
||||||
bail:
|
|
||||||
rcu_read_unlock();
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
Loading…
Reference in New Issue
Block a user