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freebsd-skq/sys/dev/ixl/ixl_iw.c
Eric Joyner cb6b8299fd ixl(4): Update to 1.7.12-k 
Refresh upstream driver before impending conversion to iflib.

Major new features:

- Support for Fortville-based 25G adapters
- Support for I2C reads/writes

(To prevent getting or sending corrupt data, you should set
dev.ixl.0.debug.disable_fw_link_management=1 when using I2C
[this will disable link!], then set it to 0 when done. The driver implements
the SIOCGI2C ioctl, so ifconfig -v works for reading I2C data,
but there are read_i2c and write_i2c sysctls under the .debug sysctl tree
[the latter being useful for upper page support in QSFP+]).

- Addition of an iWARP client interface (so the future iWARP driver for
  X722 devices can communicate with the base driver).
  - Compiling this option in is enabled by default, with "options IXL_IW" in
    GENERIC.

Differential Revision:	https://reviews.freebsd.org/D9227
Reviewed by:	sbruno
MFC after:	2 weeks
Sponsored by:	Intel Corporation
2017-02-10 01:04:11 +00:00

470 lines
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/******************************************************************************
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
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
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.h"
#include "ixl_pf.h"
#include "ixl_iw.h"
#include "ixl_iw_int.h"
#ifdef IXL_IW
#define IXL_IW_VEC_BASE(pf) ((pf)->msix - (pf)->iw_msix)
#define IXL_IW_VEC_COUNT(pf) ((pf)->iw_msix)
#define IXL_IW_VEC_LIMIT(pf) ((pf)->msix)
extern int ixl_enable_iwarp;
static struct ixl_iw_state ixl_iw;
static int ixl_iw_ref_cnt;
static void
ixl_iw_pf_msix_reset(struct ixl_pf *pf)
{
struct i40e_hw *hw = &pf->hw;
u32 reg;
int vec;
for (vec = IXL_IW_VEC_BASE(pf); vec < IXL_IW_VEC_LIMIT(pf); vec++) {
reg = I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK;
wr32(hw, I40E_PFINT_LNKLSTN(vec - 1), reg);
}
return;
}
static void
ixl_iw_invoke_op(void *context, int pending)
{
struct ixl_iw_pf_entry *pf_entry = (struct ixl_iw_pf_entry *)context;
struct ixl_iw_pf info;
bool initialize;
int err;
INIT_DEBUGOUT("begin");
mtx_lock(&ixl_iw.mtx);
if ((pf_entry->state.iw_scheduled == IXL_IW_PF_STATE_ON) &&
(pf_entry->state.iw_current == IXL_IW_PF_STATE_OFF))
initialize = true;
else if ((pf_entry->state.iw_scheduled == IXL_IW_PF_STATE_OFF) &&
(pf_entry->state.iw_current == IXL_IW_PF_STATE_ON))
initialize = false;
else {
/* nothing to be done, so finish here */
mtx_unlock(&ixl_iw.mtx);
return;
}
info = pf_entry->pf_info;
mtx_unlock(&ixl_iw.mtx);
if (initialize) {
err = ixl_iw.ops->init(&info);
if (err)
device_printf(pf_entry->pf->dev,
"%s: failed to initialize iwarp (err %d)\n",
__func__, err);
else
pf_entry->state.iw_current = IXL_IW_PF_STATE_ON;
} else {
err = ixl_iw.ops->stop(&info);
if (err)
device_printf(pf_entry->pf->dev,
"%s: failed to stop iwarp (err %d)\n",
__func__, err);
else {
ixl_iw_pf_msix_reset(pf_entry->pf);
pf_entry->state.iw_current = IXL_IW_PF_STATE_OFF;
}
}
return;
}
static void
ixl_iw_uninit(void)
{
INIT_DEBUGOUT("begin");
mtx_destroy(&ixl_iw.mtx);
return;
}
static void
ixl_iw_init(void)
{
INIT_DEBUGOUT("begin");
LIST_INIT(&ixl_iw.pfs);
mtx_init(&ixl_iw.mtx, "ixl_iw_pfs", NULL, MTX_DEF);
ixl_iw.registered = false;
return;
}
/******************************************************************************
* if_ixl internal API
*****************************************************************************/
int
ixl_iw_pf_init(struct ixl_pf *pf)
{
struct ixl_iw_pf_entry *pf_entry;
struct ixl_iw_pf *pf_info;
int err = 0;
INIT_DEBUGOUT("begin");
mtx_lock(&ixl_iw.mtx);
LIST_FOREACH(pf_entry, &ixl_iw.pfs, node)
if (pf_entry->pf == pf)
break;
if (pf_entry == NULL) {
/* attempt to initialize PF not yet attached - sth is wrong */
device_printf(pf->dev, "%s: PF not found\n", __func__);
err = ENOENT;
goto out;
}
pf_info = &pf_entry->pf_info;
pf_info->handle = (void *)pf;
pf_info->ifp = pf->vsi.ifp;
pf_info->dev = pf->dev;
pf_info->pci_mem = pf->pci_mem;
pf_info->pf_id = pf->hw.pf_id;
pf_info->mtu = pf->vsi.ifp->if_mtu;
pf_info->iw_msix.count = IXL_IW_VEC_COUNT(pf);
pf_info->iw_msix.base = IXL_IW_VEC_BASE(pf);
for (int i = 0; i < IXL_IW_MAX_USER_PRIORITY; i++)
pf_info->qs_handle[i] = le16_to_cpu(pf->vsi.info.qs_handle[0]);
pf_entry->state.pf = IXL_IW_PF_STATE_ON;
if (ixl_iw.registered) {
pf_entry->state.iw_scheduled = IXL_IW_PF_STATE_ON;
taskqueue_enqueue(ixl_iw.tq, &pf_entry->iw_task);
}
out:
mtx_unlock(&ixl_iw.mtx);
return (err);
}
void
ixl_iw_pf_stop(struct ixl_pf *pf)
{
struct ixl_iw_pf_entry *pf_entry;
INIT_DEBUGOUT("begin");
mtx_lock(&ixl_iw.mtx);
LIST_FOREACH(pf_entry, &ixl_iw.pfs, node)
if (pf_entry->pf == pf)
break;
if (pf_entry == NULL) {
/* attempt to stop PF which has not been attached - sth is wrong */
device_printf(pf->dev, "%s: PF not found\n", __func__);
goto out;
}
pf_entry->state.pf = IXL_IW_PF_STATE_OFF;
if (pf_entry->state.iw_scheduled == IXL_IW_PF_STATE_ON) {
pf_entry->state.iw_scheduled = IXL_IW_PF_STATE_OFF;
if (ixl_iw.registered)
taskqueue_enqueue(ixl_iw.tq, &pf_entry->iw_task);
}
out:
mtx_unlock(&ixl_iw.mtx);
return;
}
int
ixl_iw_pf_attach(struct ixl_pf *pf)
{
struct ixl_iw_pf_entry *pf_entry;
int err = 0;
INIT_DEBUGOUT("begin");
if (ixl_iw_ref_cnt == 0)
ixl_iw_init();
mtx_lock(&ixl_iw.mtx);
LIST_FOREACH(pf_entry, &ixl_iw.pfs, node)
if (pf_entry->pf == pf) {
device_printf(pf->dev, "%s: PF already exists\n",
__func__);
err = EEXIST;
goto out;
}
pf_entry = malloc(sizeof(struct ixl_iw_pf_entry),
M_DEVBUF, M_NOWAIT | M_ZERO);
if (pf_entry == NULL) {
device_printf(pf->dev,
"%s: failed to allocate memory to attach new PF\n",
__func__);
err = ENOMEM;
goto out;
}
pf_entry->pf = pf;
pf_entry->state.pf = IXL_IW_PF_STATE_OFF;
pf_entry->state.iw_scheduled = IXL_IW_PF_STATE_OFF;
pf_entry->state.iw_current = IXL_IW_PF_STATE_OFF;
LIST_INSERT_HEAD(&ixl_iw.pfs, pf_entry, node);
ixl_iw_ref_cnt++;
TASK_INIT(&pf_entry->iw_task, 0, ixl_iw_invoke_op, pf_entry);
out:
mtx_unlock(&ixl_iw.mtx);
return (err);
}
int
ixl_iw_pf_detach(struct ixl_pf *pf)
{
struct ixl_iw_pf_entry *pf_entry;
int err = 0;
INIT_DEBUGOUT("begin");
mtx_lock(&ixl_iw.mtx);
LIST_FOREACH(pf_entry, &ixl_iw.pfs, node)
if (pf_entry->pf == pf)
break;
if (pf_entry == NULL) {
/* attempt to stop PF which has not been attached - sth is wrong */
device_printf(pf->dev, "%s: PF not found\n", __func__);
err = ENOENT;
goto out;
}
if (pf_entry->state.pf != IXL_IW_PF_STATE_OFF) {
/* attempt to detach PF which has not yet been stopped - sth is wrong */
device_printf(pf->dev, "%s: failed - PF is still active\n",
__func__);
err = EBUSY;
goto out;
}
LIST_REMOVE(pf_entry, node);
free(pf_entry, M_DEVBUF);
ixl_iw_ref_cnt--;
out:
mtx_unlock(&ixl_iw.mtx);
if (ixl_iw_ref_cnt == 0)
ixl_iw_uninit();
return (err);
}
/******************************************************************************
* API exposed to iw_ixl module
*****************************************************************************/
int
ixl_iw_pf_reset(void *pf_handle)
{
struct ixl_pf *pf = (struct ixl_pf *)pf_handle;
INIT_DEBUGOUT("begin");
IXL_PF_LOCK(pf);
ixl_init_locked(pf);
IXL_PF_UNLOCK(pf);
return (0);
}
int
ixl_iw_pf_msix_init(void *pf_handle,
struct ixl_iw_msix_mapping *msix_info)
{
struct ixl_pf *pf = (struct ixl_pf *)pf_handle;
struct i40e_hw *hw = &pf->hw;
u32 reg;
int vec, i;
INIT_DEBUGOUT("begin");
if ((msix_info->aeq_vector < IXL_IW_VEC_BASE(pf)) ||
(msix_info->aeq_vector >= IXL_IW_VEC_LIMIT(pf))) {
printf("%s: invalid MSIX vector (%i) for AEQ\n",
__func__, msix_info->aeq_vector);
return (EINVAL);
}
reg = I40E_PFINT_AEQCTL_CAUSE_ENA_MASK |
(msix_info->aeq_vector << I40E_PFINT_AEQCTL_MSIX_INDX_SHIFT) |
(msix_info->itr_indx << I40E_PFINT_AEQCTL_ITR_INDX_SHIFT);
wr32(hw, I40E_PFINT_AEQCTL, reg);
for (vec = IXL_IW_VEC_BASE(pf); vec < IXL_IW_VEC_LIMIT(pf); vec++) {
for (i = 0; i < msix_info->ceq_cnt; i++)
if (msix_info->ceq_vector[i] == vec)
break;
if (i == msix_info->ceq_cnt) {
/* this vector has no CEQ mapped */
reg = I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK;
wr32(hw, I40E_PFINT_LNKLSTN(vec - 1), reg);
} else {
reg = (i & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK) |
(I40E_QUEUE_TYPE_PE_CEQ <<
I40E_PFINT_LNKLSTN_FIRSTQ_TYPE_SHIFT);
wr32(hw, I40E_PFINT_LNKLSTN(vec - 1), reg);
reg = I40E_PFINT_CEQCTL_CAUSE_ENA_MASK |
(vec << I40E_PFINT_CEQCTL_MSIX_INDX_SHIFT) |
(msix_info->itr_indx <<
I40E_PFINT_CEQCTL_ITR_INDX_SHIFT) |
(IXL_QUEUE_EOL <<
I40E_PFINT_CEQCTL_NEXTQ_INDX_SHIFT);
wr32(hw, I40E_PFINT_CEQCTL(i), reg);
}
}
return (0);
}
int
ixl_iw_register(struct ixl_iw_ops *ops)
{
struct ixl_iw_pf_entry *pf_entry;
int err = 0;
INIT_DEBUGOUT("begin");
if (ixl_enable_iwarp == 0) {
printf("%s: enable_iwarp is off, registering dropped\n",
__func__);
return (EACCES);
}
if ((ops->init == NULL) || (ops->stop == NULL)) {
printf("%s: invalid iwarp driver ops\n", __func__);
return (EINVAL);
}
mtx_lock(&ixl_iw.mtx);
if (ixl_iw.registered) {
printf("%s: iwarp driver already registered\n", __func__);
err = EBUSY;
goto out;
}
ixl_iw.tq = taskqueue_create("ixl_iw", M_NOWAIT,
taskqueue_thread_enqueue, &ixl_iw.tq);
if (ixl_iw.tq == NULL) {
printf("%s: failed to create queue\n", __func__);
err = ENOMEM;
goto out;
}
taskqueue_start_threads(&ixl_iw.tq, 1, PI_NET, "ixl iw");
ixl_iw.ops = malloc(sizeof(struct ixl_iw_ops),
M_DEVBUF, M_NOWAIT | M_ZERO);
if (ixl_iw.ops == NULL) {
printf("%s: failed to allocate memory\n", __func__);
taskqueue_free(ixl_iw.tq);
err = ENOMEM;
goto out;
}
ixl_iw.ops->init = ops->init;
ixl_iw.ops->stop = ops->stop;
ixl_iw.registered = true;
LIST_FOREACH(pf_entry, &ixl_iw.pfs, node)
if (pf_entry->state.pf == IXL_IW_PF_STATE_ON) {
pf_entry->state.iw_scheduled = IXL_IW_PF_STATE_ON;
taskqueue_enqueue(ixl_iw.tq, &pf_entry->iw_task);
}
out:
mtx_unlock(&ixl_iw.mtx);
return (err);
}
int
ixl_iw_unregister(void)
{
struct ixl_iw_pf_entry *pf_entry;
INIT_DEBUGOUT("begin");
mtx_lock(&ixl_iw.mtx);
if (!ixl_iw.registered) {
printf("%s: failed - iwarp driver has not been registered\n",
__func__);
mtx_unlock(&ixl_iw.mtx);
return (ENOENT);
}
LIST_FOREACH(pf_entry, &ixl_iw.pfs, node)
if (pf_entry->state.iw_scheduled == IXL_IW_PF_STATE_ON) {
pf_entry->state.iw_scheduled = IXL_IW_PF_STATE_OFF;
taskqueue_enqueue(ixl_iw.tq, &pf_entry->iw_task);
}
ixl_iw.registered = false;
mtx_unlock(&ixl_iw.mtx);
LIST_FOREACH(pf_entry, &ixl_iw.pfs, node)
taskqueue_drain(ixl_iw.tq, &pf_entry->iw_task);
taskqueue_free(ixl_iw.tq);
ixl_iw.tq = NULL;
free(ixl_iw.ops, M_DEVBUF);
ixl_iw.ops = NULL;
return (0);
}
#endif /* IXL_IW */
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