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449fc48866
linux/drivers/net/ethernet/mellanox/mlx4/eq.c
Matan Barak 449fc48866 net/mlx4: Adapt code for N-Port VF 
Adds support for N-Port VFs, this includes:
1. Adding support in the wrapped FW command
	In wrapped commands, we need to verify and convert
	the slave's port into the real physical port.
	Furthermore, when sending the response back to the slave,
	a reverse conversion should be made.
2. Adjusting sqpn for QP1 para-virtualization
	The slave assumes that sqpn is used for QP1 communication.
	If the slave is assigned to a port != (first port), we need
	to adjust the sqpn that will direct its QP1 packets into the
	correct endpoint.
3. Adjusting gid[5] to modify the port for raw ethernet
	In B0 steering, gid[5] contains the port. It needs
	to be adjusted into the physical port.
4. Adjusting number of ports in the query / ports caps in the FW commands
	When a slave queries the hardware, it needs to view only
	the physical ports it's assigned to.
5. Adjusting the sched_qp according to the port number
	The QP port is encoded in the sched_qp, thus in modify_qp we need
	to encode the correct port in sched_qp.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-20 16:18:30 -04:00

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/*
* Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
* Copyright (c) 2005, 2006, 2007 Cisco Systems, 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 <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <linux/mm.h>
#include <linux/dma-mapping.h>
#include <linux/mlx4/cmd.h>
#include <linux/cpu_rmap.h>
#include "mlx4.h"
#include "fw.h"
enum {
MLX4_IRQNAME_SIZE = 32
};
enum {
MLX4_NUM_ASYNC_EQE = 0x100,
MLX4_NUM_SPARE_EQE = 0x80,
MLX4_EQ_ENTRY_SIZE = 0x20
};
#define MLX4_EQ_STATUS_OK ( 0 << 28)
#define MLX4_EQ_STATUS_WRITE_FAIL (10 << 28)
#define MLX4_EQ_OWNER_SW ( 0 << 24)
#define MLX4_EQ_OWNER_HW ( 1 << 24)
#define MLX4_EQ_FLAG_EC ( 1 << 18)
#define MLX4_EQ_FLAG_OI ( 1 << 17)
#define MLX4_EQ_STATE_ARMED ( 9 << 8)
#define MLX4_EQ_STATE_FIRED (10 << 8)
#define MLX4_EQ_STATE_ALWAYS_ARMED (11 << 8)
#define MLX4_ASYNC_EVENT_MASK ((1ull << MLX4_EVENT_TYPE_PATH_MIG) | \
(1ull << MLX4_EVENT_TYPE_COMM_EST) | \
(1ull << MLX4_EVENT_TYPE_SQ_DRAINED) | \
(1ull << MLX4_EVENT_TYPE_CQ_ERROR) | \
(1ull << MLX4_EVENT_TYPE_WQ_CATAS_ERROR) | \
(1ull << MLX4_EVENT_TYPE_EEC_CATAS_ERROR) | \
(1ull << MLX4_EVENT_TYPE_PATH_MIG_FAILED) | \
(1ull << MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \
(1ull << MLX4_EVENT_TYPE_WQ_ACCESS_ERROR) | \
(1ull << MLX4_EVENT_TYPE_PORT_CHANGE) | \
(1ull << MLX4_EVENT_TYPE_ECC_DETECT) | \
(1ull << MLX4_EVENT_TYPE_SRQ_CATAS_ERROR) | \
(1ull << MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE) | \
(1ull << MLX4_EVENT_TYPE_SRQ_LIMIT) | \
(1ull << MLX4_EVENT_TYPE_CMD) | \
(1ull << MLX4_EVENT_TYPE_OP_REQUIRED) | \
(1ull << MLX4_EVENT_TYPE_COMM_CHANNEL) | \
(1ull << MLX4_EVENT_TYPE_FLR_EVENT) | \
(1ull << MLX4_EVENT_TYPE_FATAL_WARNING))
static u64 get_async_ev_mask(struct mlx4_dev *dev)
{
u64 async_ev_mask = MLX4_ASYNC_EVENT_MASK;
if (dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
async_ev_mask |= (1ull << MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT);
return async_ev_mask;
}
static void eq_set_ci(struct mlx4_eq *eq, int req_not)
{
__raw_writel((__force u32) cpu_to_be32((eq->cons_index & 0xffffff) |
req_not << 31),
eq->doorbell);
/* We still want ordering, just not swabbing, so add a barrier */
mb();
}
static struct mlx4_eqe *get_eqe(struct mlx4_eq *eq, u32 entry, u8 eqe_factor)
{
/* (entry & (eq->nent - 1)) gives us a cyclic array */
unsigned long offset = (entry & (eq->nent - 1)) * (MLX4_EQ_ENTRY_SIZE << eqe_factor);
/* CX3 is capable of extending the EQE from 32 to 64 bytes.
* When this feature is enabled, the first (in the lower addresses)
* 32 bytes in the 64 byte EQE are reserved and the next 32 bytes
* contain the legacy EQE information.
*/
return eq->page_list[offset / PAGE_SIZE].buf + (offset + (eqe_factor ? MLX4_EQ_ENTRY_SIZE : 0)) % PAGE_SIZE;
}
static struct mlx4_eqe *next_eqe_sw(struct mlx4_eq *eq, u8 eqe_factor)
{
struct mlx4_eqe *eqe = get_eqe(eq, eq->cons_index, eqe_factor);
return !!(eqe->owner & 0x80) ^ !!(eq->cons_index & eq->nent) ? NULL : eqe;
}
static struct mlx4_eqe *next_slave_event_eqe(struct mlx4_slave_event_eq *slave_eq)
{
struct mlx4_eqe *eqe =
&slave_eq->event_eqe[slave_eq->cons & (SLAVE_EVENT_EQ_SIZE - 1)];
return (!!(eqe->owner & 0x80) ^
!!(slave_eq->cons & SLAVE_EVENT_EQ_SIZE)) ?
eqe : NULL;
}
void mlx4_gen_slave_eqe(struct work_struct *work)
{
struct mlx4_mfunc_master_ctx *master =
container_of(work, struct mlx4_mfunc_master_ctx,
slave_event_work);
struct mlx4_mfunc *mfunc =
container_of(master, struct mlx4_mfunc, master);
struct mlx4_priv *priv = container_of(mfunc, struct mlx4_priv, mfunc);
struct mlx4_dev *dev = &priv->dev;
struct mlx4_slave_event_eq *slave_eq = &mfunc->master.slave_eq;
struct mlx4_eqe *eqe;
u8 slave;
int i;
for (eqe = next_slave_event_eqe(slave_eq); eqe;
eqe = next_slave_event_eqe(slave_eq)) {
slave = eqe->slave_id;
/* All active slaves need to receive the event */
if (slave == ALL_SLAVES) {
for (i = 0; i < dev->num_slaves; i++) {
if (i != dev->caps.function &&
master->slave_state[i].active)
if (mlx4_GEN_EQE(dev, i, eqe))
mlx4_warn(dev, "Failed to "
" generate event "
"for slave %d\n", i);
}
} else {
if (mlx4_GEN_EQE(dev, slave, eqe))
mlx4_warn(dev, "Failed to generate event "
"for slave %d\n", slave);
}
++slave_eq->cons;
}
}
static void slave_event(struct mlx4_dev *dev, u8 slave, struct mlx4_eqe *eqe)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_slave_event_eq *slave_eq = &priv->mfunc.master.slave_eq;
struct mlx4_eqe *s_eqe;
unsigned long flags;
spin_lock_irqsave(&slave_eq->event_lock, flags);
s_eqe = &slave_eq->event_eqe[slave_eq->prod & (SLAVE_EVENT_EQ_SIZE - 1)];
if ((!!(s_eqe->owner & 0x80)) ^
(!!(slave_eq->prod & SLAVE_EVENT_EQ_SIZE))) {
mlx4_warn(dev, "Master failed to generate an EQE for slave: %d. "
"No free EQE on slave events queue\n", slave);
spin_unlock_irqrestore(&slave_eq->event_lock, flags);
return;
}
memcpy(s_eqe, eqe, dev->caps.eqe_size - 1);
s_eqe->slave_id = slave;
/* ensure all information is written before setting the ownersip bit */
wmb();
s_eqe->owner = !!(slave_eq->prod & SLAVE_EVENT_EQ_SIZE) ? 0x0 : 0x80;
++slave_eq->prod;
queue_work(priv->mfunc.master.comm_wq,
&priv->mfunc.master.slave_event_work);
spin_unlock_irqrestore(&slave_eq->event_lock, flags);
}
static void mlx4_slave_event(struct mlx4_dev *dev, int slave,
struct mlx4_eqe *eqe)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_slave_state *s_slave =
&priv->mfunc.master.slave_state[slave];
if (!s_slave->active) {
/*mlx4_warn(dev, "Trying to pass event to inactive slave\n");*/
return;
}
slave_event(dev, slave, eqe);
}
int mlx4_gen_pkey_eqe(struct mlx4_dev *dev, int slave, u8 port)
{
struct mlx4_eqe eqe;
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_slave_state *s_slave = &priv->mfunc.master.slave_state[slave];
if (!s_slave->active)
return 0;
memset(&eqe, 0, sizeof eqe);
eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT;
eqe.subtype = MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE;
eqe.event.port_mgmt_change.port = port;
return mlx4_GEN_EQE(dev, slave, &eqe);
}
EXPORT_SYMBOL(mlx4_gen_pkey_eqe);
int mlx4_gen_guid_change_eqe(struct mlx4_dev *dev, int slave, u8 port)
{
struct mlx4_eqe eqe;
/*don't send if we don't have the that slave */
if (dev->num_vfs < slave)
return 0;
memset(&eqe, 0, sizeof eqe);
eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT;
eqe.subtype = MLX4_DEV_PMC_SUBTYPE_GUID_INFO;
eqe.event.port_mgmt_change.port = port;
return mlx4_GEN_EQE(dev, slave, &eqe);
}
EXPORT_SYMBOL(mlx4_gen_guid_change_eqe);
int mlx4_gen_port_state_change_eqe(struct mlx4_dev *dev, int slave, u8 port,
u8 port_subtype_change)
{
struct mlx4_eqe eqe;
/*don't send if we don't have the that slave */
if (dev->num_vfs < slave)
return 0;
memset(&eqe, 0, sizeof eqe);
eqe.type = MLX4_EVENT_TYPE_PORT_CHANGE;
eqe.subtype = port_subtype_change;
eqe.event.port_change.port = cpu_to_be32(port << 28);
mlx4_dbg(dev, "%s: sending: %d to slave: %d on port: %d\n", __func__,
port_subtype_change, slave, port);
return mlx4_GEN_EQE(dev, slave, &eqe);
}
EXPORT_SYMBOL(mlx4_gen_port_state_change_eqe);
enum slave_port_state mlx4_get_slave_port_state(struct mlx4_dev *dev, int slave, u8 port)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_slave_state *s_state = priv->mfunc.master.slave_state;
struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
if (slave >= dev->num_slaves || port > dev->caps.num_ports ||
port <= 0 || !test_bit(port - 1, actv_ports.ports)) {
pr_err("%s: Error: asking for slave:%d, port:%d\n",
__func__, slave, port);
return SLAVE_PORT_DOWN;
}
return s_state[slave].port_state[port];
}
EXPORT_SYMBOL(mlx4_get_slave_port_state);
static int mlx4_set_slave_port_state(struct mlx4_dev *dev, int slave, u8 port,
enum slave_port_state state)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_slave_state *s_state = priv->mfunc.master.slave_state;
struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
if (slave >= dev->num_slaves || port > dev->caps.num_ports ||
port <= 0 || !test_bit(port - 1, actv_ports.ports)) {
pr_err("%s: Error: asking for slave:%d, port:%d\n",
__func__, slave, port);
return -1;
}
s_state[slave].port_state[port] = state;
return 0;
}
static void set_all_slave_state(struct mlx4_dev *dev, u8 port, int event)
{
int i;
enum slave_port_gen_event gen_event;
struct mlx4_slaves_pport slaves_pport = mlx4_phys_to_slaves_pport(dev,
port);
for (i = 0; i < dev->num_vfs + 1; i++)
if (test_bit(i, slaves_pport.slaves))
set_and_calc_slave_port_state(dev, i, port,
event, &gen_event);
}
/**************************************************************************
The function get as input the new event to that port,
and according to the prev state change the slave's port state.
The events are:
MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN,
MLX4_PORT_STATE_DEV_EVENT_PORT_UP
MLX4_PORT_STATE_IB_EVENT_GID_VALID
MLX4_PORT_STATE_IB_EVENT_GID_INVALID
***************************************************************************/
int set_and_calc_slave_port_state(struct mlx4_dev *dev, int slave,
u8 port, int event,
enum slave_port_gen_event *gen_event)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_slave_state *ctx = NULL;
unsigned long flags;
int ret = -1;
struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
enum slave_port_state cur_state =
mlx4_get_slave_port_state(dev, slave, port);
*gen_event = SLAVE_PORT_GEN_EVENT_NONE;
if (slave >= dev->num_slaves || port > dev->caps.num_ports ||
port <= 0 || !test_bit(port - 1, actv_ports.ports)) {
pr_err("%s: Error: asking for slave:%d, port:%d\n",
__func__, slave, port);
return ret;
}
ctx = &priv->mfunc.master.slave_state[slave];
spin_lock_irqsave(&ctx->lock, flags);
switch (cur_state) {
case SLAVE_PORT_DOWN:
if (MLX4_PORT_STATE_DEV_EVENT_PORT_UP == event)
mlx4_set_slave_port_state(dev, slave, port,
SLAVE_PENDING_UP);
break;
case SLAVE_PENDING_UP:
if (MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN == event)
mlx4_set_slave_port_state(dev, slave, port,
SLAVE_PORT_DOWN);
else if (MLX4_PORT_STATE_IB_PORT_STATE_EVENT_GID_VALID == event) {
mlx4_set_slave_port_state(dev, slave, port,
SLAVE_PORT_UP);
*gen_event = SLAVE_PORT_GEN_EVENT_UP;
}
break;
case SLAVE_PORT_UP:
if (MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN == event) {
mlx4_set_slave_port_state(dev, slave, port,
SLAVE_PORT_DOWN);
*gen_event = SLAVE_PORT_GEN_EVENT_DOWN;
} else if (MLX4_PORT_STATE_IB_EVENT_GID_INVALID ==
event) {
mlx4_set_slave_port_state(dev, slave, port,
SLAVE_PENDING_UP);
*gen_event = SLAVE_PORT_GEN_EVENT_DOWN;
}
break;
default:
pr_err("%s: BUG!!! UNKNOWN state: "
"slave:%d, port:%d\n", __func__, slave, port);
goto out;
}
ret = mlx4_get_slave_port_state(dev, slave, port);
out:
spin_unlock_irqrestore(&ctx->lock, flags);
return ret;
}
EXPORT_SYMBOL(set_and_calc_slave_port_state);
int mlx4_gen_slaves_port_mgt_ev(struct mlx4_dev *dev, u8 port, int attr)
{
struct mlx4_eqe eqe;
memset(&eqe, 0, sizeof eqe);
eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT;
eqe.subtype = MLX4_DEV_PMC_SUBTYPE_PORT_INFO;
eqe.event.port_mgmt_change.port = port;
eqe.event.port_mgmt_change.params.port_info.changed_attr =
cpu_to_be32((u32) attr);
slave_event(dev, ALL_SLAVES, &eqe);
return 0;
}
EXPORT_SYMBOL(mlx4_gen_slaves_port_mgt_ev);
void mlx4_master_handle_slave_flr(struct work_struct *work)
{
struct mlx4_mfunc_master_ctx *master =
container_of(work, struct mlx4_mfunc_master_ctx,
slave_flr_event_work);
struct mlx4_mfunc *mfunc =
container_of(master, struct mlx4_mfunc, master);
struct mlx4_priv *priv =
container_of(mfunc, struct mlx4_priv, mfunc);
struct mlx4_dev *dev = &priv->dev;
struct mlx4_slave_state *slave_state = priv->mfunc.master.slave_state;
int i;
int err;
unsigned long flags;
mlx4_dbg(dev, "mlx4_handle_slave_flr\n");
for (i = 0 ; i < dev->num_slaves; i++) {
if (MLX4_COMM_CMD_FLR == slave_state[i].last_cmd) {
mlx4_dbg(dev, "mlx4_handle_slave_flr: "
"clean slave: %d\n", i);
mlx4_delete_all_resources_for_slave(dev, i);
/*return the slave to running mode*/
spin_lock_irqsave(&priv->mfunc.master.slave_state_lock, flags);
slave_state[i].last_cmd = MLX4_COMM_CMD_RESET;
slave_state[i].is_slave_going_down = 0;
spin_unlock_irqrestore(&priv->mfunc.master.slave_state_lock, flags);
/*notify the FW:*/
err = mlx4_cmd(dev, 0, i, 0, MLX4_CMD_INFORM_FLR_DONE,
MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
if (err)
mlx4_warn(dev, "Failed to notify FW on "
"FLR done (slave:%d)\n", i);
}
}
}
static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_eqe *eqe;
int cqn;
int eqes_found = 0;
int set_ci = 0;
int port;
int slave = 0;
int ret;
u32 flr_slave;
u8 update_slave_state;
int i;
enum slave_port_gen_event gen_event;
unsigned long flags;
struct mlx4_vport_state *s_info;
while ((eqe = next_eqe_sw(eq, dev->caps.eqe_factor))) {
/*
* Make sure we read EQ entry contents after we've
* checked the ownership bit.
*/
rmb();
switch (eqe->type) {
case MLX4_EVENT_TYPE_COMP:
cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff;
mlx4_cq_completion(dev, cqn);
break;
case MLX4_EVENT_TYPE_PATH_MIG:
case MLX4_EVENT_TYPE_COMM_EST:
case MLX4_EVENT_TYPE_SQ_DRAINED:
case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
mlx4_dbg(dev, "event %d arrived\n", eqe->type);
if (mlx4_is_master(dev)) {
/* forward only to slave owning the QP */
ret = mlx4_get_slave_from_resource_id(dev,
RES_QP,
be32_to_cpu(eqe->event.qp.qpn)
& 0xffffff, &slave);
if (ret && ret != -ENOENT) {
mlx4_dbg(dev, "QP event %02x(%02x) on "
"EQ %d at index %u: could "
"not get slave id (%d)\n",
eqe->type, eqe->subtype,
eq->eqn, eq->cons_index, ret);
break;
}
if (!ret && slave != dev->caps.function) {
mlx4_slave_event(dev, slave, eqe);
break;
}
}
mlx4_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) &
0xffffff, eqe->type);
break;
case MLX4_EVENT_TYPE_SRQ_LIMIT:
mlx4_dbg(dev, "%s: MLX4_EVENT_TYPE_SRQ_LIMIT\n",
__func__);
case MLX4_EVENT_TYPE_SRQ_CATAS_ERROR:
if (mlx4_is_master(dev)) {
/* forward only to slave owning the SRQ */
ret = mlx4_get_slave_from_resource_id(dev,
RES_SRQ,
be32_to_cpu(eqe->event.srq.srqn)
& 0xffffff,
&slave);
if (ret && ret != -ENOENT) {
mlx4_warn(dev, "SRQ event %02x(%02x) "
"on EQ %d at index %u: could"
" not get slave id (%d)\n",
eqe->type, eqe->subtype,
eq->eqn, eq->cons_index, ret);
break;
}
mlx4_warn(dev, "%s: slave:%d, srq_no:0x%x,"
" event: %02x(%02x)\n", __func__,
slave,
be32_to_cpu(eqe->event.srq.srqn),
eqe->type, eqe->subtype);
if (!ret && slave != dev->caps.function) {
mlx4_warn(dev, "%s: sending event "
"%02x(%02x) to slave:%d\n",
__func__, eqe->type,
eqe->subtype, slave);
mlx4_slave_event(dev, slave, eqe);
break;
}
}
mlx4_srq_event(dev, be32_to_cpu(eqe->event.srq.srqn) &
0xffffff, eqe->type);
break;
case MLX4_EVENT_TYPE_CMD:
mlx4_cmd_event(dev,
be16_to_cpu(eqe->event.cmd.token),
eqe->event.cmd.status,
be64_to_cpu(eqe->event.cmd.out_param));
break;
case MLX4_EVENT_TYPE_PORT_CHANGE: {
struct mlx4_slaves_pport slaves_port;
port = be32_to_cpu(eqe->event.port_change.port) >> 28;
slaves_port = mlx4_phys_to_slaves_pport(dev, port);
if (eqe->subtype == MLX4_PORT_CHANGE_SUBTYPE_DOWN) {
mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_DOWN,
port);
mlx4_priv(dev)->sense.do_sense_port[port] = 1;
if (!mlx4_is_master(dev))
break;
for (i = 0; i < dev->num_vfs + 1; i++) {
if (!test_bit(i, slaves_port.slaves))
continue;
if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH) {
if (i == mlx4_master_func_num(dev))
continue;
mlx4_dbg(dev, "%s: Sending MLX4_PORT_CHANGE_SUBTYPE_DOWN"
" to slave: %d, port:%d\n",
__func__, i, port);
s_info = &priv->mfunc.master.vf_oper[slave].vport[port].state;
if (IFLA_VF_LINK_STATE_AUTO == s_info->link_state) {
eqe->event.port_change.port =
cpu_to_be32(
(be32_to_cpu(eqe->event.port_change.port) & 0xFFFFFFF)
| (mlx4_phys_to_slave_port(dev, i, port) << 28));
mlx4_slave_event(dev, i, eqe);
}
} else { /* IB port */
set_and_calc_slave_port_state(dev, i, port,
MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN,
&gen_event);
/*we can be in pending state, then do not send port_down event*/
if (SLAVE_PORT_GEN_EVENT_DOWN == gen_event) {
if (i == mlx4_master_func_num(dev))
continue;
mlx4_slave_event(dev, i, eqe);
}
}
}
} else {
mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_UP, port);
mlx4_priv(dev)->sense.do_sense_port[port] = 0;
if (!mlx4_is_master(dev))
break;
if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
for (i = 0; i < dev->num_vfs + 1; i++) {
if (!test_bit(i, slaves_port.slaves))
continue;
if (i == mlx4_master_func_num(dev))
continue;
s_info = &priv->mfunc.master.vf_oper[slave].vport[port].state;
if (IFLA_VF_LINK_STATE_AUTO == s_info->link_state) {
eqe->event.port_change.port =
cpu_to_be32(
(be32_to_cpu(eqe->event.port_change.port) & 0xFFFFFFF)
| (mlx4_phys_to_slave_port(dev, i, port) << 28));
mlx4_slave_event(dev, i, eqe);
}
}
else /* IB port */
/* port-up event will be sent to a slave when the
* slave's alias-guid is set. This is done in alias_GUID.c
*/
set_all_slave_state(dev, port, MLX4_DEV_EVENT_PORT_UP);
}
break;
}
case MLX4_EVENT_TYPE_CQ_ERROR:
mlx4_warn(dev, "CQ %s on CQN %06x\n",
eqe->event.cq_err.syndrome == 1 ?
"overrun" : "access violation",
be32_to_cpu(eqe->event.cq_err.cqn) & 0xffffff);
if (mlx4_is_master(dev)) {
ret = mlx4_get_slave_from_resource_id(dev,
RES_CQ,
be32_to_cpu(eqe->event.cq_err.cqn)
& 0xffffff, &slave);
if (ret && ret != -ENOENT) {
mlx4_dbg(dev, "CQ event %02x(%02x) on "
"EQ %d at index %u: could "
"not get slave id (%d)\n",
eqe->type, eqe->subtype,
eq->eqn, eq->cons_index, ret);
break;
}
if (!ret && slave != dev->caps.function) {
mlx4_slave_event(dev, slave, eqe);
break;
}
}
mlx4_cq_event(dev,
be32_to_cpu(eqe->event.cq_err.cqn)
& 0xffffff,
eqe->type);
break;
case MLX4_EVENT_TYPE_EQ_OVERFLOW:
mlx4_warn(dev, "EQ overrun on EQN %d\n", eq->eqn);
break;
case MLX4_EVENT_TYPE_OP_REQUIRED:
atomic_inc(&priv->opreq_count);
/* FW commands can't be executed from interrupt context
* working in deferred task
*/
queue_work(mlx4_wq, &priv->opreq_task);
break;
case MLX4_EVENT_TYPE_COMM_CHANNEL:
if (!mlx4_is_master(dev)) {
mlx4_warn(dev, "Received comm channel event "
"for non master device\n");
break;
}
memcpy(&priv->mfunc.master.comm_arm_bit_vector,
eqe->event.comm_channel_arm.bit_vec,
sizeof eqe->event.comm_channel_arm.bit_vec);
queue_work(priv->mfunc.master.comm_wq,
&priv->mfunc.master.comm_work);
break;
case MLX4_EVENT_TYPE_FLR_EVENT:
flr_slave = be32_to_cpu(eqe->event.flr_event.slave_id);
if (!mlx4_is_master(dev)) {
mlx4_warn(dev, "Non-master function received"
"FLR event\n");
break;
}
mlx4_dbg(dev, "FLR event for slave: %d\n", flr_slave);
if (flr_slave >= dev->num_slaves) {
mlx4_warn(dev,
"Got FLR for unknown function: %d\n",
flr_slave);
update_slave_state = 0;
} else
update_slave_state = 1;
spin_lock_irqsave(&priv->mfunc.master.slave_state_lock, flags);
if (update_slave_state) {
priv->mfunc.master.slave_state[flr_slave].active = false;
priv->mfunc.master.slave_state[flr_slave].last_cmd = MLX4_COMM_CMD_FLR;
priv->mfunc.master.slave_state[flr_slave].is_slave_going_down = 1;
}
spin_unlock_irqrestore(&priv->mfunc.master.slave_state_lock, flags);
queue_work(priv->mfunc.master.comm_wq,
&priv->mfunc.master.slave_flr_event_work);
break;
case MLX4_EVENT_TYPE_FATAL_WARNING:
if (eqe->subtype == MLX4_FATAL_WARNING_SUBTYPE_WARMING) {
if (mlx4_is_master(dev))
for (i = 0; i < dev->num_slaves; i++) {
mlx4_dbg(dev, "%s: Sending "
"MLX4_FATAL_WARNING_SUBTYPE_WARMING"
" to slave: %d\n", __func__, i);
if (i == dev->caps.function)
continue;
mlx4_slave_event(dev, i, eqe);
}
mlx4_err(dev, "Temperature Threshold was reached! "
"Threshold: %d celsius degrees; "
"Current Temperature: %d\n",
be16_to_cpu(eqe->event.warming.warning_threshold),
be16_to_cpu(eqe->event.warming.current_temperature));
} else
mlx4_warn(dev, "Unhandled event FATAL WARNING (%02x), "
"subtype %02x on EQ %d at index %u. owner=%x, "
"nent=0x%x, slave=%x, ownership=%s\n",
eqe->type, eqe->subtype, eq->eqn,
eq->cons_index, eqe->owner, eq->nent,
eqe->slave_id,
!!(eqe->owner & 0x80) ^
!!(eq->cons_index & eq->nent) ? "HW" : "SW");
break;
case MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT:
mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_MGMT_CHANGE,
(unsigned long) eqe);
break;
case MLX4_EVENT_TYPE_EEC_CATAS_ERROR:
case MLX4_EVENT_TYPE_ECC_DETECT:
default:
mlx4_warn(dev, "Unhandled event %02x(%02x) on EQ %d at "
"index %u. owner=%x, nent=0x%x, slave=%x, "
"ownership=%s\n",
eqe->type, eqe->subtype, eq->eqn,
eq->cons_index, eqe->owner, eq->nent,
eqe->slave_id,
!!(eqe->owner & 0x80) ^
!!(eq->cons_index & eq->nent) ? "HW" : "SW");
break;
};
++eq->cons_index;
eqes_found = 1;
++set_ci;
/*
* The HCA will think the queue has overflowed if we
* don't tell it we've been processing events. We
* create our EQs with MLX4_NUM_SPARE_EQE extra
* entries, so we must update our consumer index at
* least that often.
*/
if (unlikely(set_ci >= MLX4_NUM_SPARE_EQE)) {
eq_set_ci(eq, 0);
set_ci = 0;
}
}
eq_set_ci(eq, 1);
return eqes_found;
}
static irqreturn_t mlx4_interrupt(int irq, void *dev_ptr)
{
struct mlx4_dev *dev = dev_ptr;
struct mlx4_priv *priv = mlx4_priv(dev);
int work = 0;
int i;
writel(priv->eq_table.clr_mask, priv->eq_table.clr_int);
for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
work |= mlx4_eq_int(dev, &priv->eq_table.eq[i]);
return IRQ_RETVAL(work);
}
static irqreturn_t mlx4_msi_x_interrupt(int irq, void *eq_ptr)
{
struct mlx4_eq *eq = eq_ptr;
struct mlx4_dev *dev = eq->dev;
mlx4_eq_int(dev, eq);
/* MSI-X vectors always belong to us */
return IRQ_HANDLED;
}
int mlx4_MAP_EQ_wrapper(struct mlx4_dev *dev, int slave,
struct mlx4_vhcr *vhcr,
struct mlx4_cmd_mailbox *inbox,
struct mlx4_cmd_mailbox *outbox,
struct mlx4_cmd_info *cmd)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_slave_event_eq_info *event_eq =
priv->mfunc.master.slave_state[slave].event_eq;
u32 in_modifier = vhcr->in_modifier;
u32 eqn = in_modifier & 0x3FF;
u64 in_param = vhcr->in_param;
int err = 0;
int i;
if (slave == dev->caps.function)
err = mlx4_cmd(dev, in_param, (in_modifier & 0x80000000) | eqn,
0, MLX4_CMD_MAP_EQ, MLX4_CMD_TIME_CLASS_B,
MLX4_CMD_NATIVE);
if (!err)
for (i = 0; i < MLX4_EVENT_TYPES_NUM; ++i)
if (in_param & (1LL << i))
event_eq[i].eqn = in_modifier >> 31 ? -1 : eqn;
return err;
}
static int mlx4_MAP_EQ(struct mlx4_dev *dev, u64 event_mask, int unmap,
int eq_num)
{
return mlx4_cmd(dev, event_mask, (unmap << 31) | eq_num,
0, MLX4_CMD_MAP_EQ, MLX4_CMD_TIME_CLASS_B,
MLX4_CMD_WRAPPED);
}
static int mlx4_SW2HW_EQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
int eq_num)
{
return mlx4_cmd(dev, mailbox->dma, eq_num, 0,
MLX4_CMD_SW2HW_EQ, MLX4_CMD_TIME_CLASS_A,
MLX4_CMD_WRAPPED);
}
static int mlx4_HW2SW_EQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
int eq_num)
{
return mlx4_cmd_box(dev, 0, mailbox->dma, eq_num,
0, MLX4_CMD_HW2SW_EQ, MLX4_CMD_TIME_CLASS_A,
MLX4_CMD_WRAPPED);
}
static int mlx4_num_eq_uar(struct mlx4_dev *dev)
{
/*
* Each UAR holds 4 EQ doorbells. To figure out how many UARs
* we need to map, take the difference of highest index and
* the lowest index we'll use and add 1.
*/
return (dev->caps.num_comp_vectors + 1 + dev->caps.reserved_eqs +
dev->caps.comp_pool)/4 - dev->caps.reserved_eqs/4 + 1;
}
static void __iomem *mlx4_get_eq_uar(struct mlx4_dev *dev, struct mlx4_eq *eq)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int index;
index = eq->eqn / 4 - dev->caps.reserved_eqs / 4;
if (!priv->eq_table.uar_map[index]) {
priv->eq_table.uar_map[index] =
ioremap(pci_resource_start(dev->pdev, 2) +
((eq->eqn / 4) << PAGE_SHIFT),
PAGE_SIZE);
if (!priv->eq_table.uar_map[index]) {
mlx4_err(dev, "Couldn't map EQ doorbell for EQN 0x%06x\n",
eq->eqn);
return NULL;
}
}
return priv->eq_table.uar_map[index] + 0x800 + 8 * (eq->eqn % 4);
}
static void mlx4_unmap_uar(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int i;
for (i = 0; i < mlx4_num_eq_uar(dev); ++i)
if (priv->eq_table.uar_map[i]) {
iounmap(priv->eq_table.uar_map[i]);
priv->eq_table.uar_map[i] = NULL;
}
}
static int mlx4_create_eq(struct mlx4_dev *dev, int nent,
u8 intr, struct mlx4_eq *eq)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_cmd_mailbox *mailbox;
struct mlx4_eq_context *eq_context;
int npages;
u64 *dma_list = NULL;
dma_addr_t t;
u64 mtt_addr;
int err = -ENOMEM;
int i;
eq->dev = dev;
eq->nent = roundup_pow_of_two(max(nent, 2));
/* CX3 is capable of extending the CQE/EQE from 32 to 64 bytes */
npages = PAGE_ALIGN(eq->nent * (MLX4_EQ_ENTRY_SIZE << dev->caps.eqe_factor)) / PAGE_SIZE;
eq->page_list = kmalloc(npages * sizeof *eq->page_list,
GFP_KERNEL);
if (!eq->page_list)
goto err_out;
for (i = 0; i < npages; ++i)
eq->page_list[i].buf = NULL;
dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
if (!dma_list)
goto err_out_free;
mailbox = mlx4_alloc_cmd_mailbox(dev);
if (IS_ERR(mailbox))
goto err_out_free;
eq_context = mailbox->buf;
for (i = 0; i < npages; ++i) {
eq->page_list[i].buf = dma_alloc_coherent(&dev->pdev->dev,
PAGE_SIZE, &t, GFP_KERNEL);
if (!eq->page_list[i].buf)
goto err_out_free_pages;
dma_list[i] = t;
eq->page_list[i].map = t;
memset(eq->page_list[i].buf, 0, PAGE_SIZE);
}
eq->eqn = mlx4_bitmap_alloc(&priv->eq_table.bitmap);
if (eq->eqn == -1)
goto err_out_free_pages;
eq->doorbell = mlx4_get_eq_uar(dev, eq);
if (!eq->doorbell) {
err = -ENOMEM;
goto err_out_free_eq;
}
err = mlx4_mtt_init(dev, npages, PAGE_SHIFT, &eq->mtt);
if (err)
goto err_out_free_eq;
err = mlx4_write_mtt(dev, &eq->mtt, 0, npages, dma_list);
if (err)
goto err_out_free_mtt;
eq_context->flags = cpu_to_be32(MLX4_EQ_STATUS_OK |
MLX4_EQ_STATE_ARMED);
eq_context->log_eq_size = ilog2(eq->nent);
eq_context->intr = intr;
eq_context->log_page_size = PAGE_SHIFT - MLX4_ICM_PAGE_SHIFT;
mtt_addr = mlx4_mtt_addr(dev, &eq->mtt);
eq_context->mtt_base_addr_h = mtt_addr >> 32;
eq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
err = mlx4_SW2HW_EQ(dev, mailbox, eq->eqn);
if (err) {
mlx4_warn(dev, "SW2HW_EQ failed (%d)\n", err);
goto err_out_free_mtt;
}
kfree(dma_list);
mlx4_free_cmd_mailbox(dev, mailbox);
eq->cons_index = 0;
return err;
err_out_free_mtt:
mlx4_mtt_cleanup(dev, &eq->mtt);
err_out_free_eq:
mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn, MLX4_USE_RR);
err_out_free_pages:
for (i = 0; i < npages; ++i)
if (eq->page_list[i].buf)
dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
eq->page_list[i].buf,
eq->page_list[i].map);
mlx4_free_cmd_mailbox(dev, mailbox);
err_out_free:
kfree(eq->page_list);
kfree(dma_list);
err_out:
return err;
}
static void mlx4_free_eq(struct mlx4_dev *dev,
struct mlx4_eq *eq)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_cmd_mailbox *mailbox;
int err;
int i;
/* CX3 is capable of extending the CQE/EQE from 32 to 64 bytes */
int npages = PAGE_ALIGN((MLX4_EQ_ENTRY_SIZE << dev->caps.eqe_factor) * eq->nent) / PAGE_SIZE;
mailbox = mlx4_alloc_cmd_mailbox(dev);
if (IS_ERR(mailbox))
return;
err = mlx4_HW2SW_EQ(dev, mailbox, eq->eqn);
if (err)
mlx4_warn(dev, "HW2SW_EQ failed (%d)\n", err);
if (0) {
mlx4_dbg(dev, "Dumping EQ context %02x:\n", eq->eqn);
for (i = 0; i < sizeof (struct mlx4_eq_context) / 4; ++i) {
if (i % 4 == 0)
pr_cont("[%02x] ", i * 4);
pr_cont(" %08x", be32_to_cpup(mailbox->buf + i * 4));
if ((i + 1) % 4 == 0)
pr_cont("\n");
}
}
mlx4_mtt_cleanup(dev, &eq->mtt);
for (i = 0; i < npages; ++i)
dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
eq->page_list[i].buf,
eq->page_list[i].map);
kfree(eq->page_list);
mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn, MLX4_USE_RR);
mlx4_free_cmd_mailbox(dev, mailbox);
}
static void mlx4_free_irqs(struct mlx4_dev *dev)
{
struct mlx4_eq_table *eq_table = &mlx4_priv(dev)->eq_table;
struct mlx4_priv *priv = mlx4_priv(dev);
int i, vec;
if (eq_table->have_irq)
free_irq(dev->pdev->irq, dev);
for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
if (eq_table->eq[i].have_irq) {
free_irq(eq_table->eq[i].irq, eq_table->eq + i);
eq_table->eq[i].have_irq = 0;
}
for (i = 0; i < dev->caps.comp_pool; i++) {
/*
* Freeing the assigned irq's
* all bits should be 0, but we need to validate
*/
if (priv->msix_ctl.pool_bm & 1ULL << i) {
/* NO need protecting*/
vec = dev->caps.num_comp_vectors + 1 + i;
free_irq(priv->eq_table.eq[vec].irq,
&priv->eq_table.eq[vec]);
}
}
kfree(eq_table->irq_names);
}
static int mlx4_map_clr_int(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
priv->clr_base = ioremap(pci_resource_start(dev->pdev, priv->fw.clr_int_bar) +
priv->fw.clr_int_base, MLX4_CLR_INT_SIZE);
if (!priv->clr_base) {
mlx4_err(dev, "Couldn't map interrupt clear register, aborting.\n");
return -ENOMEM;
}
return 0;
}
static void mlx4_unmap_clr_int(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
iounmap(priv->clr_base);
}
int mlx4_alloc_eq_table(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
priv->eq_table.eq = kcalloc(dev->caps.num_eqs - dev->caps.reserved_eqs,
sizeof *priv->eq_table.eq, GFP_KERNEL);
if (!priv->eq_table.eq)
return -ENOMEM;
return 0;
}
void mlx4_free_eq_table(struct mlx4_dev *dev)
{
kfree(mlx4_priv(dev)->eq_table.eq);
}
int mlx4_init_eq_table(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int err;
int i;
priv->eq_table.uar_map = kcalloc(mlx4_num_eq_uar(dev),
sizeof *priv->eq_table.uar_map,
GFP_KERNEL);
if (!priv->eq_table.uar_map) {
err = -ENOMEM;
goto err_out_free;
}
err = mlx4_bitmap_init(&priv->eq_table.bitmap, dev->caps.num_eqs,
dev->caps.num_eqs - 1, dev->caps.reserved_eqs, 0);
if (err)
goto err_out_free;
for (i = 0; i < mlx4_num_eq_uar(dev); ++i)
priv->eq_table.uar_map[i] = NULL;
if (!mlx4_is_slave(dev)) {
err = mlx4_map_clr_int(dev);
if (err)
goto err_out_bitmap;
priv->eq_table.clr_mask =
swab32(1 << (priv->eq_table.inta_pin & 31));
priv->eq_table.clr_int = priv->clr_base +
(priv->eq_table.inta_pin < 32 ? 4 : 0);
}
priv->eq_table.irq_names =
kmalloc(MLX4_IRQNAME_SIZE * (dev->caps.num_comp_vectors + 1 +
dev->caps.comp_pool),
GFP_KERNEL);
if (!priv->eq_table.irq_names) {
err = -ENOMEM;
goto err_out_bitmap;
}
for (i = 0; i < dev->caps.num_comp_vectors; ++i) {
err = mlx4_create_eq(dev, dev->caps.num_cqs -
dev->caps.reserved_cqs +
MLX4_NUM_SPARE_EQE,
(dev->flags & MLX4_FLAG_MSI_X) ? i : 0,
&priv->eq_table.eq[i]);
if (err) {
--i;
goto err_out_unmap;
}
}
err = mlx4_create_eq(dev, MLX4_NUM_ASYNC_EQE + MLX4_NUM_SPARE_EQE,
(dev->flags & MLX4_FLAG_MSI_X) ? dev->caps.num_comp_vectors : 0,
&priv->eq_table.eq[dev->caps.num_comp_vectors]);
if (err)
goto err_out_comp;
/*if additional completion vectors poolsize is 0 this loop will not run*/
for (i = dev->caps.num_comp_vectors + 1;
i < dev->caps.num_comp_vectors + dev->caps.comp_pool + 1; ++i) {
err = mlx4_create_eq(dev, dev->caps.num_cqs -
dev->caps.reserved_cqs +
MLX4_NUM_SPARE_EQE,
(dev->flags & MLX4_FLAG_MSI_X) ? i : 0,
&priv->eq_table.eq[i]);
if (err) {
--i;
goto err_out_unmap;
}
}
if (dev->flags & MLX4_FLAG_MSI_X) {
const char *eq_name;
for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i) {
if (i < dev->caps.num_comp_vectors) {
snprintf(priv->eq_table.irq_names +
i * MLX4_IRQNAME_SIZE,
MLX4_IRQNAME_SIZE,
"mlx4-comp-%d@pci:%s", i,
pci_name(dev->pdev));
} else {
snprintf(priv->eq_table.irq_names +
i * MLX4_IRQNAME_SIZE,
MLX4_IRQNAME_SIZE,
"mlx4-async@pci:%s",
pci_name(dev->pdev));
}
eq_name = priv->eq_table.irq_names +
i * MLX4_IRQNAME_SIZE;
err = request_irq(priv->eq_table.eq[i].irq,
mlx4_msi_x_interrupt, 0, eq_name,
priv->eq_table.eq + i);
if (err)
goto err_out_async;
priv->eq_table.eq[i].have_irq = 1;
}
} else {
snprintf(priv->eq_table.irq_names,
MLX4_IRQNAME_SIZE,
DRV_NAME "@pci:%s",
pci_name(dev->pdev));
err = request_irq(dev->pdev->irq, mlx4_interrupt,
IRQF_SHARED, priv->eq_table.irq_names, dev);
if (err)
goto err_out_async;
priv->eq_table.have_irq = 1;
}
err = mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
priv->eq_table.eq[dev->caps.num_comp_vectors].eqn);
if (err)
mlx4_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n",
priv->eq_table.eq[dev->caps.num_comp_vectors].eqn, err);
for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
eq_set_ci(&priv->eq_table.eq[i], 1);
return 0;
err_out_async:
mlx4_free_eq(dev, &priv->eq_table.eq[dev->caps.num_comp_vectors]);
err_out_comp:
i = dev->caps.num_comp_vectors - 1;
err_out_unmap:
while (i >= 0) {
mlx4_free_eq(dev, &priv->eq_table.eq[i]);
--i;
}
if (!mlx4_is_slave(dev))
mlx4_unmap_clr_int(dev);
mlx4_free_irqs(dev);
err_out_bitmap:
mlx4_unmap_uar(dev);
mlx4_bitmap_cleanup(&priv->eq_table.bitmap);
err_out_free:
kfree(priv->eq_table.uar_map);
return err;
}
void mlx4_cleanup_eq_table(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int i;
mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 1,
priv->eq_table.eq[dev->caps.num_comp_vectors].eqn);
mlx4_free_irqs(dev);
for (i = 0; i < dev->caps.num_comp_vectors + dev->caps.comp_pool + 1; ++i)
mlx4_free_eq(dev, &priv->eq_table.eq[i]);
if (!mlx4_is_slave(dev))
mlx4_unmap_clr_int(dev);
mlx4_unmap_uar(dev);
mlx4_bitmap_cleanup(&priv->eq_table.bitmap);
kfree(priv->eq_table.uar_map);
}
/* A test that verifies that we can accept interrupts on all
* the irq vectors of the device.
* Interrupts are checked using the NOP command.
*/
int mlx4_test_interrupts(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int i;
int err;
err = mlx4_NOP(dev);
/* When not in MSI_X, there is only one irq to check */
if (!(dev->flags & MLX4_FLAG_MSI_X) || mlx4_is_slave(dev))
return err;
/* A loop over all completion vectors, for each vector we will check
* whether it works by mapping command completions to that vector
* and performing a NOP command
*/
for(i = 0; !err && (i < dev->caps.num_comp_vectors); ++i) {
/* Temporary use polling for command completions */
mlx4_cmd_use_polling(dev);
/* Map the new eq to handle all asynchronous events */
err = mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
priv->eq_table.eq[i].eqn);
if (err) {
mlx4_warn(dev, "Failed mapping eq for interrupt test\n");
mlx4_cmd_use_events(dev);
break;
}
/* Go back to using events */
mlx4_cmd_use_events(dev);
err = mlx4_NOP(dev);
}
/* Return to default */
mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
priv->eq_table.eq[dev->caps.num_comp_vectors].eqn);
return err;
}
EXPORT_SYMBOL(mlx4_test_interrupts);
int mlx4_assign_eq(struct mlx4_dev *dev, char *name, struct cpu_rmap *rmap,
int *vector)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int vec = 0, err = 0, i;
mutex_lock(&priv->msix_ctl.pool_lock);
for (i = 0; !vec && i < dev->caps.comp_pool; i++) {
if (~priv->msix_ctl.pool_bm & 1ULL << i) {
priv->msix_ctl.pool_bm |= 1ULL << i;
vec = dev->caps.num_comp_vectors + 1 + i;
snprintf(priv->eq_table.irq_names +
vec * MLX4_IRQNAME_SIZE,
MLX4_IRQNAME_SIZE, "%s", name);
#ifdef CONFIG_RFS_ACCEL
if (rmap) {
err = irq_cpu_rmap_add(rmap,
priv->eq_table.eq[vec].irq);
if (err)
mlx4_warn(dev, "Failed adding irq rmap\n");
}
#endif
err = request_irq(priv->eq_table.eq[vec].irq,
mlx4_msi_x_interrupt, 0,
&priv->eq_table.irq_names[vec<<5],
priv->eq_table.eq + vec);
if (err) {
/*zero out bit by fliping it*/
priv->msix_ctl.pool_bm ^= 1 << i;
vec = 0;
continue;
/*we dont want to break here*/
}
eq_set_ci(&priv->eq_table.eq[vec], 1);
}
}
mutex_unlock(&priv->msix_ctl.pool_lock);
if (vec) {
*vector = vec;
} else {
*vector = 0;
err = (i == dev->caps.comp_pool) ? -ENOSPC : err;
}
return err;
}
EXPORT_SYMBOL(mlx4_assign_eq);
void mlx4_release_eq(struct mlx4_dev *dev, int vec)
{
struct mlx4_priv *priv = mlx4_priv(dev);
/*bm index*/
int i = vec - dev->caps.num_comp_vectors - 1;
if (likely(i >= 0)) {
/*sanity check , making sure were not trying to free irq's
Belonging to a legacy EQ*/
mutex_lock(&priv->msix_ctl.pool_lock);
if (priv->msix_ctl.pool_bm & 1ULL << i) {
free_irq(priv->eq_table.eq[vec].irq,
&priv->eq_table.eq[vec]);
priv->msix_ctl.pool_bm &= ~(1ULL << i);
}
mutex_unlock(&priv->msix_ctl.pool_lock);
}
}
EXPORT_SYMBOL(mlx4_release_eq);
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