freebsd-dev/sys/dev/ixl/ixl_pf_qmgr.c
Sean Bruno 4294f337b0 ixl(4): Update to ixl-1.6.6-k.
Submitted by:	erj
Reviewed by:	jeffrey.e.pieper@intel.com
MFC after:	3 days
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D7391
2016-08-07 18:12:36 +00:00

309 lines
7.5 KiB
C

/******************************************************************************
Copyright (c) 2013-2015, Intel Corporation
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
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3. Neither the name of the Intel Corporation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
******************************************************************************/
/*$FreeBSD$*/
#include "ixl_pf_qmgr.h"
static int ixl_pf_qmgr_find_free_contiguous_block(struct ixl_pf_qmgr *qmgr, int num);
int
ixl_pf_qmgr_init(struct ixl_pf_qmgr *qmgr, u16 num_queues)
{
if (num_queues < 1)
return (EINVAL);
qmgr->num_queues = num_queues;
qmgr->qinfo = malloc(num_queues * sizeof(struct ixl_pf_qmgr_qinfo),
M_IXL, M_ZERO | M_WAITOK);
if (qmgr->qinfo == NULL)
return ENOMEM;
return (0);
}
int
ixl_pf_qmgr_alloc_contiguous(struct ixl_pf_qmgr *qmgr, u16 num, struct ixl_pf_qtag *qtag)
{
int i;
int avail;
int block_start;
u16 alloc_size;
if (qtag == NULL || num < 1)
return (EINVAL);
/* We have to allocate in power-of-two chunks, so get next power of two */
alloc_size = (u16)next_power_of_two(num);
/* Don't try if there aren't enough queues */
avail = ixl_pf_qmgr_get_num_free(qmgr);
if (avail < alloc_size)
return (ENOSPC);
block_start = ixl_pf_qmgr_find_free_contiguous_block(qmgr, alloc_size);
if (block_start < 0)
return (ENOSPC);
/* Mark queues as allocated */
for (i = block_start; i < block_start + alloc_size; i++)
qmgr->qinfo[i].allocated = true;
bzero(qtag, sizeof(*qtag));
qtag->qmgr = qmgr;
qtag->type = IXL_PF_QALLOC_CONTIGUOUS;
qtag->qidx[0] = block_start;
qtag->num_allocated = num;
qtag->num_active = alloc_size;
return (0);
}
/*
* NB: indices is u16 because this is the queue index width used in the Add VSI AQ command
*/
int
ixl_pf_qmgr_alloc_scattered(struct ixl_pf_qmgr *qmgr, u16 num, struct ixl_pf_qtag *qtag)
{
int i;
int avail, count = 0;
u16 alloc_size;
if (qtag == NULL || num < 1 || num > 16)
return (EINVAL);
/* We have to allocate in power-of-two chunks, so get next power of two */
alloc_size = (u16)next_power_of_two(num);
avail = ixl_pf_qmgr_get_num_free(qmgr);
if (avail < alloc_size)
return (ENOSPC);
bzero(qtag, sizeof(*qtag));
qtag->qmgr = qmgr;
qtag->type = IXL_PF_QALLOC_SCATTERED;
qtag->num_active = num;
qtag->num_allocated = alloc_size;
for (i = 0; i < qmgr->num_queues; i++) {
if (!qmgr->qinfo[i].allocated) {
qtag->qidx[count] = i;
count++;
qmgr->qinfo[i].allocated = true;
if (count == alloc_size)
return (0);
}
}
// Shouldn't get here
return (EDOOFUS);
}
int
ixl_pf_qmgr_release(struct ixl_pf_qmgr *qmgr, struct ixl_pf_qtag *qtag)
{
u16 i, qidx;
if (qtag == NULL)
return (EINVAL);
if (qtag->type == IXL_PF_QALLOC_SCATTERED) {
for (i = 0; i < qtag->num_allocated; i++) {
qidx = qtag->qidx[i];
bzero(&qmgr->qinfo[qidx], sizeof(qmgr->qinfo[qidx]));
}
} else {
u16 first_index = qtag->qidx[0];
for (i = first_index; i < first_index + qtag->num_allocated; i++)
bzero(&qmgr->qinfo[i], sizeof(qmgr->qinfo[qidx]));
}
qtag->qmgr = NULL;
return (0);
}
int
ixl_pf_qmgr_get_num_queues(struct ixl_pf_qmgr *qmgr)
{
return (qmgr->num_queues);
}
/*
* ERJ: This assumes the info array isn't longer than INT_MAX.
* This assumption might cause a y3k bug or something, I'm sure.
*/
int
ixl_pf_qmgr_get_num_free(struct ixl_pf_qmgr *qmgr)
{
int count = 0;
for (int i = 0; i < qmgr->num_queues; i++) {
if (!qmgr->qinfo[i].allocated)
count++;
}
return (count);
}
int
ixl_pf_qmgr_get_first_free(struct ixl_pf_qmgr *qmgr, u16 start)
{
int i;
if (start > qmgr->num_queues - 1)
return (-EINVAL);
for (i = start; i < qmgr->num_queues; i++) {
if (qmgr->qinfo[i].allocated)
continue;
else
return (i);
}
// No free queues
return (-ENOSPC);
}
void
ixl_pf_qmgr_destroy(struct ixl_pf_qmgr *qmgr)
{
free(qmgr->qinfo, M_IXL);
qmgr->qinfo = NULL;
}
void
ixl_pf_qmgr_mark_queue_enabled(struct ixl_pf_qtag *qtag, u16 vsi_qidx, bool tx)
{
MPASS(qtag != NULL);
struct ixl_pf_qmgr *qmgr = qtag->qmgr;
u16 pf_qidx = ixl_pf_qidx_from_vsi_qidx(qtag, vsi_qidx);
if (tx)
qmgr->qinfo[pf_qidx].tx_enabled = true;
else
qmgr->qinfo[pf_qidx].rx_enabled = true;
}
void
ixl_pf_qmgr_mark_queue_disabled(struct ixl_pf_qtag *qtag, u16 vsi_qidx, bool tx)
{
MPASS(qtag != NULL);
struct ixl_pf_qmgr *qmgr = qtag->qmgr;
u16 pf_qidx = ixl_pf_qidx_from_vsi_qidx(qtag, vsi_qidx);
if (tx)
qmgr->qinfo[pf_qidx].tx_enabled = false;
else
qmgr->qinfo[pf_qidx].rx_enabled = false;
}
void
ixl_pf_qmgr_mark_queue_configured(struct ixl_pf_qtag *qtag, u16 vsi_qidx, bool tx)
{
MPASS(qtag != NULL);
struct ixl_pf_qmgr *qmgr = qtag->qmgr;
u16 pf_qidx = ixl_pf_qidx_from_vsi_qidx(qtag, vsi_qidx);
if (tx)
qmgr->qinfo[pf_qidx].tx_configured = true;
else
qmgr->qinfo[pf_qidx].rx_configured = true;
}
bool
ixl_pf_qmgr_is_queue_enabled(struct ixl_pf_qtag *qtag, u16 vsi_qidx, bool tx)
{
MPASS(qtag != NULL);
struct ixl_pf_qmgr *qmgr = qtag->qmgr;
u16 pf_qidx = ixl_pf_qidx_from_vsi_qidx(qtag, vsi_qidx);
if (tx)
return (qmgr->qinfo[pf_qidx].tx_enabled);
else
return (qmgr->qinfo[pf_qidx].rx_enabled);
}
bool
ixl_pf_qmgr_is_queue_configured(struct ixl_pf_qtag *qtag, u16 vsi_qidx, bool tx)
{
MPASS(qtag != NULL);
struct ixl_pf_qmgr *qmgr = qtag->qmgr;
u16 pf_qidx = ixl_pf_qidx_from_vsi_qidx(qtag, vsi_qidx);
if (tx)
return (qmgr->qinfo[pf_qidx].tx_configured);
else
return (qmgr->qinfo[pf_qidx].rx_configured);
}
u16
ixl_pf_qidx_from_vsi_qidx(struct ixl_pf_qtag *qtag, u16 index)
{
MPASS(index < qtag->num_allocated);
if (qtag->type == IXL_PF_QALLOC_CONTIGUOUS)
return qtag->qidx[0] + index;
else
return qtag->qidx[index];
}
/* Static Functions */
static int
ixl_pf_qmgr_find_free_contiguous_block(struct ixl_pf_qmgr *qmgr, int num)
{
int i;
int count = 0;
bool block_started = false;
int possible_start;
for (i = 0; i < qmgr->num_queues; i++) {
if (!qmgr->qinfo[i].allocated) {
if (!block_started) {
block_started = true;
possible_start = i;
}
count++;
if (count == num)
return (possible_start);
} else { /* this queue is already allocated */
block_started = false;
count = 0;
}
}
/* Can't find a contiguous block of the requested size */
return (-1);
}