/*
* Copyright (c) 2009-2010 Chelsio, 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.
*/
/* Crude resource management */
#include <linux/spinlock.h>
#include <linux/genalloc.h>
#include <linux/ratelimit.h>
#include "iw_cxgb4.h"
static int c4iw_init_qid_table(struct c4iw_rdev *rdev)
{
u32 i;
if (c4iw_id_table_alloc(&rdev->resource.qid_table,
rdev->lldi.vr->qp.start,
rdev->lldi.vr->qp.size,
rdev->lldi.vr->qp.size, 0))
return -ENOMEM;
for (i = rdev->lldi.vr->qp.start;
i < rdev->lldi.vr->qp.start + rdev->lldi.vr->qp.size; i++)
if (!(i & rdev->qpmask))
c4iw_id_free(&rdev->resource.qid_table, i);
return 0;
}
/* nr_* must be power of 2 */
int c4iw_init_resource(struct c4iw_rdev *rdev, u32 nr_tpt,
u32 nr_pdid, u32 nr_srqt)
{
int err = 0;
err = c4iw_id_table_alloc(&rdev->resource.tpt_table, 0, nr_tpt, 1,
C4IW_ID_TABLE_F_RANDOM);
if (err)
goto tpt_err;
err = c4iw_init_qid_table(rdev);
if (err)
goto qid_err;
err = c4iw_id_table_alloc(&rdev->resource.pdid_table, 0,
nr_pdid, 1, 0);
if (err)
goto pdid_err;
if (!nr_srqt)
err = c4iw_id_table_alloc(&rdev->resource.srq_table, 0,
1, 1, 0);
else
err = c4iw_id_table_alloc(&rdev->resource.srq_table, 0,
nr_srqt, 0, 0);
if (err)
goto srq_err;
return 0;
srq_err:
c4iw_id_table_free(&rdev->resource.pdid_table);
pdid_err:
c4iw_id_table_free(&rdev->resource.qid_table);
qid_err:
c4iw_id_table_free(&rdev->resource.tpt_table);
tpt_err:
return -ENOMEM;
}
/*
* returns 0 if no resource available
*/
u32 c4iw_get_resource(struct c4iw_id_table *id_table)
{
u32 entry;
entry = c4iw_id_alloc(id_table);
if (entry == (u32)(-1))
return 0;
return entry;
}
void c4iw_put_resource(struct c4iw_id_table *id_table, u32 entry)
{
pr_debug("entry 0x%x\n", entry);
c4iw_id_free(id_table, entry);
}
u32 c4iw_get_cqid(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx)
{
struct c4iw_qid_list *entry;
u32 qid;
int i;
mutex_lock(&uctx->lock);
if (!list_empty(&uctx->cqids)) {
entry = list_entry(uctx->cqids.next, struct c4iw_qid_list,
entry);
list_del(&entry->entry);
qid = entry->qid;
kfree(entry);
} else {
qid = c4iw_get_resource(&rdev->resource.qid_table);
if (!qid)
goto out;
mutex_lock(&rdev->stats.lock);
rdev->stats.qid.cur += rdev->qpmask + 1;
mutex_unlock(&rdev->stats.lock);
for (i = qid+1; i & rdev->qpmask; i++) {
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
goto out;
entry->qid = i;
list_add_tail(&entry->entry, &uctx->cqids);
}
/*
* now put the same ids on the qp list since they all
* map to the same db/gts page.
*/
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
goto out;
entry->qid = qid;
list_add_tail(&entry->entry, &uctx->qpids);
for (i = qid+1; i & rdev->qpmask; i++) {
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
goto out;
entry->qid = i;
list_add_tail(&entry->entry, &uctx->qpids);
}
}
out:
mutex_unlock(&uctx->lock);
pr_debug("qid 0x%x\n", qid);
mutex_lock(&rdev->stats.lock);
if (rdev->stats.qid.cur > rdev->stats.qid.max)
rdev->stats.qid.max = rdev->stats.qid.cur;
mutex_unlock(&rdev->stats.lock);
return qid;
}
void c4iw_put_cqid(struct c4iw_rdev *rdev, u32 qid,
struct c4iw_dev_ucontext *uctx)
{
struct c4iw_qid_list *entry;
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
return;
pr_debug("qid 0x%x\n", qid);
entry->qid = qid;
mutex_lock(&uctx->lock);
list_add_tail(&entry->entry, &uctx->cqids);
mutex_unlock(&uctx->lock);
}
u32 c4iw_get_qpid(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx)
{
struct c4iw_qid_list *entry;
u32 qid;
int i;
mutex_lock(&uctx->lock);
if (!list_empty(&uctx->qpids)) {
entry = list_entry(uctx->qpids.next, struct c4iw_qid_list,
entry);
list_del(&entry->entry);
qid = entry->qid;
kfree(entry);
} else {
qid = c4iw_get_resource(&rdev->resource.qid_table);
if (!qid) {
mutex_lock(&rdev->stats.lock);
rdev->stats.qid.fail++;
mutex_unlock(&rdev->stats.lock);
goto out;
}
mutex_lock(&rdev->stats.lock);
rdev->stats.qid.cur += rdev->qpmask + 1;
mutex_unlock(&rdev->stats.lock);
for (i = qid+1; i & rdev->qpmask; i++) {
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
goto out;
entry->qid = i;
list_add_tail(&entry->entry, &uctx->qpids);
}
/*
* now put the same ids on the cq list since they all
* map to the same db/gts page.
*/
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
goto out;
entry->qid = qid;
list_add_tail(&entry->entry, &uctx->cqids);
for (i = qid + 1; i & rdev->qpmask; i++) {
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
goto out;
entry->qid = i;
list_add_tail(&entry->entry, &uctx->cqids);
}
}
out:
mutex_unlock(&uctx->lock);
pr_debug("qid 0x%x\n", qid);
mutex_lock(&rdev->stats.lock);
if (rdev->stats.qid.cur > rdev->stats.qid.max)
rdev->stats.qid.max = rdev->stats.qid.cur;
mutex_unlock(&rdev->stats.lock);
return qid;
}
void c4iw_put_qpid(struct c4iw_rdev *rdev, u32 qid,
struct c4iw_dev_ucontext *uctx)
{
struct c4iw_qid_list *entry;
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
return;
pr_debug("qid 0x%x\n", qid);
entry->qid = qid;
mutex_lock(&uctx->lock);
list_add_tail(&entry->entry, &uctx->qpids);
mutex_unlock(&uctx->lock);
}
void c4iw_destroy_resource(struct c4iw_resource *rscp)
{
c4iw_id_table_free(&rscp->tpt_table);
c4iw_id_table_free(&rscp->qid_table);
c4iw_id_table_free(&rscp->pdid_table);
}
/*
* PBL Memory Manager. Uses Linux generic allocator.
*/
#define MIN_PBL_SHIFT 8 /* 256B == min PBL size (32 entries) */
u32 c4iw_pblpool_alloc(struct c4iw_rdev *rdev, int size)
{
unsigned long addr = gen_pool_alloc(rdev->pbl_pool, size);
pr_debug("addr 0x%x size %d\n", (u32)addr, size);
mutex_lock(&rdev->stats.lock);
if (addr) {
rdev->stats.pbl.cur += roundup(size, 1 << MIN_PBL_SHIFT);
if (rdev->stats.pbl.cur > rdev->stats.pbl.max)
rdev->stats.pbl.max = rdev->stats.pbl.cur;
kref_get(&rdev->pbl_kref);
} else
rdev->stats.pbl.fail++;
mutex_unlock(&rdev->stats.lock);
return (u32)addr;
}
static void destroy_pblpool(struct kref *kref)
{
struct c4iw_rdev *rdev;
rdev = container_of(kref, struct c4iw_rdev, pbl_kref);
gen_pool_destroy(rdev->pbl_pool);
complete(&rdev->pbl_compl);
}
void c4iw_pblpool_free(struct c4iw_rdev *rdev, u32 addr, int size)
{
pr_debug("addr 0x%x size %d\n", addr, size);
mutex_lock(&rdev->stats.lock);
rdev->stats.pbl.cur -= roundup(size, 1 << MIN_PBL_SHIFT);
mutex_unlock(&rdev->stats.lock);
gen_pool_free(rdev->pbl_pool, (unsigned long)addr, size);
kref_put(&rdev->pbl_kref, destroy_pblpool);
}
int c4iw_pblpool_create(struct c4iw_rdev *rdev)
{
unsigned pbl_start, pbl_chunk, pbl_top;
rdev->pbl_pool = gen_pool_create(MIN_PBL_SHIFT, -1);
if (!rdev->pbl_pool)
return -ENOMEM;
pbl_start = rdev->lldi.vr->pbl.start;
pbl_chunk = rdev->lldi.vr->pbl.size;
pbl_top = pbl_start + pbl_chunk;
while (pbl_start < pbl_top) {
pbl_chunk = min(pbl_top - pbl_start + 1, pbl_chunk);
if (gen_pool_add(rdev->pbl_pool, pbl_start, pbl_chunk, -1)) {
pr_debug("failed to add PBL chunk (%x/%x)\n",
pbl_start, pbl_chunk);
if (pbl_chunk <= 1024 << MIN_PBL_SHIFT) {
pr_warn("Failed to add all PBL chunks (%x/%x)\n",
pbl_start, pbl_top - pbl_start);
return 0;
}
pbl_chunk >>= 1;
} else {
pr_debug("added PBL chunk (%x/%x)\n",
pbl_start, pbl_chunk);
pbl_start += pbl_chunk;
}
}
return 0;
}
void c4iw_pblpool_destroy(struct c4iw_rdev *rdev)
{
kref_put(&rdev->pbl_kref, destroy_pblpool);
}
/*
* RQT Memory Manager. Uses Linux generic allocator.
*/
#define MIN_RQT_SHIFT 10 /* 1KB == min RQT size (16 entries) */
u32 c4iw_rqtpool_alloc(struct c4iw_rdev *rdev, int size)
{
unsigned long addr = gen_pool_alloc(rdev->rqt_pool, size << 6);
pr_debug("addr 0x%x size %d\n", (u32)addr, size << 6);
if (!addr)
pr_warn_ratelimited("%s: Out of RQT memory\n",
pci_name(rdev->lldi.pdev));
mutex_lock(&rdev->stats.lock);
if (addr) {
rdev->stats.rqt.cur += roundup(size << 6, 1 << MIN_RQT_SHIFT);
if (rdev->stats.rqt.cur > rdev->stats.rqt.max)
rdev->stats.rqt.max = rdev->stats.rqt.cur;
kref_get(&rdev->rqt_kref);
} else
rdev->stats.rqt.fail++;
mutex_unlock(&rdev->stats.lock);
return (u32)addr;
}
static void destroy_rqtpool(struct kref *kref)
{
struct c4iw_rdev *rdev;
rdev = container_of(kref, struct c4iw_rdev, rqt_kref);
gen_pool_destroy(rdev->rqt_pool);
complete(&rdev->rqt_compl);
}
void c4iw_rqtpool_free(struct c4iw_rdev *rdev, u32 addr, int size)
{
pr_debug("addr 0x%x size %d\n", addr, size << 6);
mutex_lock(&rdev->stats.lock);
rdev->stats.rqt.cur -= roundup(size << 6, 1 << MIN_RQT_SHIFT);
mutex_unlock(&rdev->stats.lock);
gen_pool_free(rdev->rqt_pool, (unsigned long)addr, size << 6);
kref_put(&rdev->rqt_kref, destroy_rqtpool);
}
int c4iw_rqtpool_create(struct c4iw_rdev *rdev)
{
unsigned rqt_start, rqt_chunk, rqt_top;
int skip = 0;
rdev->rqt_pool = gen_pool_create(MIN_RQT_SHIFT, -1);
if (!rdev->rqt_pool)
return -ENOMEM;
/*
* If SRQs are supported, then never use the first RQE from
* the RQT region. This is because HW uses RQT index 0 as NULL.
*/
if (rdev->lldi.vr->srq.size)
skip = T4_RQT_ENTRY_SIZE;
rqt_start = rdev->lldi.vr->rq.start + skip;
rqt_chunk = rdev->lldi.vr->rq.size - skip;
rqt_top = rqt_start + rqt_chunk;
while (rqt_start < rqt_top) {
rqt_chunk = min(rqt_top - rqt_start + 1, rqt_chunk);
if (gen_pool_add(rdev->rqt_pool, rqt_start, rqt_chunk, -1)) {
pr_debug("failed to add RQT chunk (%x/%x)\n",
rqt_start, rqt_chunk);
if (rqt_chunk <= 1024 << MIN_RQT_SHIFT) {
pr_warn("Failed to add all RQT chunks (%x/%x)\n",
rqt_start, rqt_top - rqt_start);
return 0;
}
rqt_chunk >>= 1;
} else {
pr_debug("added RQT chunk (%x/%x)\n",
rqt_start, rqt_chunk);
rqt_start += rqt_chunk;
}
}
return 0;
}
void c4iw_rqtpool_destroy(struct c4iw_rdev *rdev)
{
kref_put(&rdev->rqt_kref, destroy_rqtpool);
}
int c4iw_alloc_srq_idx(struct c4iw_rdev *rdev)
{
int idx;
idx = c4iw_id_alloc(&rdev->resource.srq_table);
mutex_lock(&rdev->stats.lock);
if (idx == -1) {
rdev->stats.srqt.fail++;
mutex_unlock(&rdev->stats.lock);
return -ENOMEM;
}
rdev->stats.srqt.cur++;
if (rdev->stats.srqt.cur > rdev->stats.srqt.max)
rdev->stats.srqt.max = rdev->stats.srqt.cur;
mutex_unlock(&rdev->stats.lock);
return idx;
}
void c4iw_free_srq_idx(struct c4iw_rdev *rdev, int idx)
{
c4iw_id_free(&rdev->resource.srq_table, idx);
mutex_lock(&rdev->stats.lock);
rdev->stats.srqt.cur--;
mutex_unlock(&rdev->stats.lock);
}
/*
* On-Chip QP Memory.
*/
#define MIN_OCQP_SHIFT 12 /* 4KB == min ocqp size */
u32 c4iw_ocqp_pool_alloc(struct c4iw_rdev *rdev, int size)
{
unsigned long addr = gen_pool_alloc(rdev->ocqp_pool, size);
pr_debug("addr 0x%x size %d\n", (u32)addr, size);
if (addr) {
mutex_lock(&rdev->stats.lock);
rdev->stats.ocqp.cur += roundup(size, 1 << MIN_OCQP_SHIFT);
if (rdev->stats.ocqp.cur > rdev->stats.ocqp.max)
rdev->stats.ocqp.max = rdev->stats.ocqp.cur;
mutex_unlock(&rdev->stats.lock);
}
return (u32)addr;
}
void c4iw_ocqp_pool_free(struct c4iw_rdev *rdev, u32 addr, int size)
{
pr_debug("addr 0x%x size %d\n", addr, size);
mutex_lock(&rdev->stats.lock);
rdev->stats.ocqp.cur -= roundup(size, 1 << MIN_OCQP_SHIFT);
mutex_unlock(&rdev->stats.lock);
gen_pool_free(rdev->ocqp_pool, (unsigned long)addr, size);
}
int c4iw_ocqp_pool_create(struct c4iw_rdev *rdev)
{
unsigned start, chunk, top;
rdev->ocqp_pool = gen_pool_create(MIN_OCQP_SHIFT, -1);
if (!rdev->ocqp_pool)
return -ENOMEM;
start = rdev->lldi.vr->ocq.start;
chunk = rdev->lldi.vr->ocq.size;
top = start + chunk;
while (start < top) {
chunk = min(top - start + 1, chunk);
if (gen_pool_add(rdev->ocqp_pool, start, chunk, -1)) {
pr_debug("failed to add OCQP chunk (%x/%x)\n",
start, chunk);
if (chunk <= 1024 << MIN_OCQP_SHIFT) {
pr_warn("Failed to add all OCQP chunks (%x/%x)\n",
start, top - start);
return 0;
}
chunk >>= 1;
} else {
pr_debug("added OCQP chunk (%x/%x)\n",
start, chunk);
start += chunk;
}
}
return 0;
}
void c4iw_ocqp_pool_destroy(struct c4iw_rdev *rdev)
{
gen_pool_destroy(rdev->ocqp_pool);
}
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