freebsd-dev/sys/dev/cxgbe/iw_cxgbe/device.c
2013-10-18 00:00:08 +00:00

370 lines
8.3 KiB
C

/*
* Copyright (c) 2009-2013 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include <sys/ktr.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <rdma/ib_verbs.h>
#include <linux/idr.h>
#ifdef TCP_OFFLOAD
#include "iw_cxgbe.h"
int spg_creds = 2; /* Default status page size is 2 credits = 128B */
void
c4iw_release_dev_ucontext(struct c4iw_rdev *rdev,
struct c4iw_dev_ucontext *uctx)
{
struct list_head *pos, *nxt;
struct c4iw_qid_list *entry;
mutex_lock(&uctx->lock);
list_for_each_safe(pos, nxt, &uctx->qpids) {
entry = list_entry(pos, struct c4iw_qid_list, entry);
list_del_init(&entry->entry);
if (!(entry->qid & rdev->qpmask)) {
c4iw_put_resource(&rdev->resource.qid_table,
entry->qid);
mutex_lock(&rdev->stats.lock);
rdev->stats.qid.cur -= rdev->qpmask + 1;
mutex_unlock(&rdev->stats.lock);
}
kfree(entry);
}
list_for_each_safe(pos, nxt, &uctx->qpids) {
entry = list_entry(pos, struct c4iw_qid_list, entry);
list_del_init(&entry->entry);
kfree(entry);
}
mutex_unlock(&uctx->lock);
}
void
c4iw_init_dev_ucontext(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx)
{
INIT_LIST_HEAD(&uctx->qpids);
INIT_LIST_HEAD(&uctx->cqids);
mutex_init(&uctx->lock);
}
static int
c4iw_rdev_open(struct c4iw_rdev *rdev)
{
struct adapter *sc = rdev->adap;
int rc;
c4iw_init_dev_ucontext(rdev, &rdev->uctx);
/* Save the status page size set by if_cxgbe */
spg_creds = (t4_read_reg(sc, A_SGE_CONTROL) & F_EGRSTATUSPAGESIZE) ?
2 : 1;
/* XXX: we can probably make this work */
if (sc->sge.eq_s_qpp > PAGE_SHIFT || sc->sge.iq_s_qpp > PAGE_SHIFT) {
device_printf(sc->dev,
"doorbell density too high (eq %d, iq %d, pg %d).\n",
sc->sge.eq_s_qpp, sc->sge.eq_s_qpp, PAGE_SHIFT);
rc = -EINVAL;
goto err1;
}
rdev->qpshift = PAGE_SHIFT - sc->sge.eq_s_qpp;
rdev->qpmask = (1 << sc->sge.eq_s_qpp) - 1;
rdev->cqshift = PAGE_SHIFT - sc->sge.iq_s_qpp;
rdev->cqmask = (1 << sc->sge.iq_s_qpp) - 1;
if (c4iw_num_stags(rdev) == 0) {
rc = -EINVAL;
goto err1;
}
rdev->stats.pd.total = T4_MAX_NUM_PD;
rdev->stats.stag.total = sc->vres.stag.size;
rdev->stats.pbl.total = sc->vres.pbl.size;
rdev->stats.rqt.total = sc->vres.rq.size;
rdev->stats.qid.total = sc->vres.qp.size;
rc = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD);
if (rc) {
device_printf(sc->dev, "error %d initializing resources\n", rc);
goto err1;
}
rc = c4iw_pblpool_create(rdev);
if (rc) {
device_printf(sc->dev, "error %d initializing pbl pool\n", rc);
goto err2;
}
rc = c4iw_rqtpool_create(rdev);
if (rc) {
device_printf(sc->dev, "error %d initializing rqt pool\n", rc);
goto err3;
}
return (0);
err3:
c4iw_pblpool_destroy(rdev);
err2:
c4iw_destroy_resource(&rdev->resource);
err1:
return (rc);
}
static void c4iw_rdev_close(struct c4iw_rdev *rdev)
{
c4iw_pblpool_destroy(rdev);
c4iw_rqtpool_destroy(rdev);
c4iw_destroy_resource(&rdev->resource);
}
static void
c4iw_dealloc(struct c4iw_dev *iwsc)
{
c4iw_rdev_close(&iwsc->rdev);
idr_destroy(&iwsc->cqidr);
idr_destroy(&iwsc->qpidr);
idr_destroy(&iwsc->mmidr);
ib_dealloc_device(&iwsc->ibdev);
}
static struct c4iw_dev *
c4iw_alloc(struct adapter *sc)
{
struct c4iw_dev *iwsc;
int rc;
iwsc = (struct c4iw_dev *)ib_alloc_device(sizeof(*iwsc));
if (iwsc == NULL) {
device_printf(sc->dev, "Cannot allocate ib device.\n");
return (ERR_PTR(-ENOMEM));
}
iwsc->rdev.adap = sc;
rc = c4iw_rdev_open(&iwsc->rdev);
if (rc != 0) {
device_printf(sc->dev, "Unable to open CXIO rdev (%d)\n", rc);
ib_dealloc_device(&iwsc->ibdev);
return (ERR_PTR(rc));
}
idr_init(&iwsc->cqidr);
idr_init(&iwsc->qpidr);
idr_init(&iwsc->mmidr);
spin_lock_init(&iwsc->lock);
mutex_init(&iwsc->rdev.stats.lock);
return (iwsc);
}
static int c4iw_mod_load(void);
static int c4iw_mod_unload(void);
static int c4iw_activate(struct adapter *);
static int c4iw_deactivate(struct adapter *);
static struct uld_info c4iw_uld_info = {
.uld_id = ULD_IWARP,
.activate = c4iw_activate,
.deactivate = c4iw_deactivate,
};
static int
c4iw_activate(struct adapter *sc)
{
struct c4iw_dev *iwsc;
int rc;
ASSERT_SYNCHRONIZED_OP(sc);
if (isset(&sc->offload_map, MAX_NPORTS)) {
KASSERT(0, ("%s: RDMA already eanbled on sc %p", __func__, sc));
return (0);
}
if (sc->rdmacaps == 0) {
device_printf(sc->dev,
"RDMA not supported or RDMA cap is not enabled.\n");
return (ENOSYS);
}
iwsc = c4iw_alloc(sc);
if (IS_ERR(iwsc)) {
rc = -PTR_ERR(iwsc);
device_printf(sc->dev, "initialization failed: %d\n", rc);
return (rc);
}
sc->iwarp_softc = iwsc;
c4iw_cm_init_cpl(sc);
rc = -c4iw_register_device(iwsc);
if (rc) {
device_printf(sc->dev, "RDMA registration failed: %d\n", rc);
c4iw_dealloc(iwsc);
sc->iwarp_softc = NULL;
}
return (rc);
}
static int
c4iw_deactivate(struct adapter *sc)
{
struct c4iw_dev *iwsc = sc->iwarp_softc;
ASSERT_SYNCHRONIZED_OP(sc);
c4iw_unregister_device(iwsc);
c4iw_dealloc(iwsc);
sc->iwarp_softc = NULL;
return (0);
}
static void
c4iw_activate_all(struct adapter *sc, void *arg __unused)
{
if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4iwact") != 0)
return;
if (!isset(&sc->offload_map, MAX_NPORTS) &&
t4_activate_uld(sc, ULD_IWARP) == 0)
setbit(&sc->offload_map, MAX_NPORTS);
end_synchronized_op(sc, 0);
}
static void
c4iw_deactivate_all(struct adapter *sc, void *arg __unused)
{
if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4iwdea") != 0)
return;
if (isset(&sc->offload_map, MAX_NPORTS) &&
t4_deactivate_uld(sc, ULD_IWARP) == 0)
clrbit(&sc->offload_map, MAX_NPORTS);
end_synchronized_op(sc, 0);
}
static int
c4iw_mod_load(void)
{
int rc;
rc = -c4iw_cm_init();
if (rc != 0)
return (rc);
rc = t4_register_uld(&c4iw_uld_info);
if (rc != 0) {
c4iw_cm_term();
return (rc);
}
t4_iterate(c4iw_activate_all, NULL);
return (rc);
}
static int
c4iw_mod_unload(void)
{
t4_iterate(c4iw_deactivate_all, NULL);
c4iw_cm_term();
if (t4_unregister_uld(&c4iw_uld_info) == EBUSY)
return (EBUSY);
return (0);
}
#endif
#undef MODULE_VERSION
#include <sys/module.h>
/*
* t4_tom won't load on kernels without TCP_OFFLOAD and this module's dependency
* on t4_tom ensures that it won't either. So we don't directly check for
* TCP_OFFLOAD here.
*/
static int
c4iw_modevent(module_t mod, int cmd, void *arg)
{
int rc = 0;
#ifdef TCP_OFFLOAD
switch (cmd) {
case MOD_LOAD:
rc = c4iw_mod_load();
if (rc == 0)
printf("iw_cxgbe: Chelsio T4/T5 RDMA driver loaded.\n");
break;
case MOD_UNLOAD:
rc = c4iw_mod_unload();
break;
default:
rc = EINVAL;
}
#else
printf("t4_tom: compiled without TCP_OFFLOAD support.\n");
rc = EOPNOTSUPP;
#endif
return (rc);
}
static moduledata_t c4iw_mod_data = {
"iw_cxgbe",
c4iw_modevent,
0
};
MODULE_VERSION(iw_cxgbe, 1);
MODULE_DEPEND(iw_cxgbe, t4nex, 1, 1, 1);
MODULE_DEPEND(iw_cxgbe, t4_tom, 1, 1, 1);
MODULE_DEPEND(iw_cxgbe, ibcore, 1, 1, 1);
DECLARE_MODULE(iw_cxgbe, c4iw_mod_data, SI_SUB_EXEC, SI_ORDER_ANY);