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linux-sg2042/drivers/net/ethernet/mellanox/mlx4/cmd.c

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/*
* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
* 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/sched.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <linux/pci.h>
#include <linux/errno.h>
#include <linux/mlx4/cmd.h>
#include <linux/semaphore.h>
#include <asm/io.h>
#include "mlx4.h"
#include "fw.h"
#define CMD_POLL_TOKEN 0xffff
#define INBOX_MASK 0xffffffffffffff00ULL
#define CMD_CHAN_VER 1
#define CMD_CHAN_IF_REV 1
enum {
/* command completed successfully: */
CMD_STAT_OK = 0x00,
/* Internal error (such as a bus error) occurred while processing command: */
CMD_STAT_INTERNAL_ERR = 0x01,
/* Operation/command not supported or opcode modifier not supported: */
CMD_STAT_BAD_OP = 0x02,
/* Parameter not supported or parameter out of range: */
CMD_STAT_BAD_PARAM = 0x03,
/* System not enabled or bad system state: */
CMD_STAT_BAD_SYS_STATE = 0x04,
/* Attempt to access reserved or unallocaterd resource: */
CMD_STAT_BAD_RESOURCE = 0x05,
/* Requested resource is currently executing a command, or is otherwise busy: */
CMD_STAT_RESOURCE_BUSY = 0x06,
/* Required capability exceeds device limits: */
CMD_STAT_EXCEED_LIM = 0x08,
/* Resource is not in the appropriate state or ownership: */
CMD_STAT_BAD_RES_STATE = 0x09,
/* Index out of range: */
CMD_STAT_BAD_INDEX = 0x0a,
/* FW image corrupted: */
CMD_STAT_BAD_NVMEM = 0x0b,
/* Error in ICM mapping (e.g. not enough auxiliary ICM pages to execute command): */
CMD_STAT_ICM_ERROR = 0x0c,
/* Attempt to modify a QP/EE which is not in the presumed state: */
CMD_STAT_BAD_QP_STATE = 0x10,
/* Bad segment parameters (Address/Size): */
CMD_STAT_BAD_SEG_PARAM = 0x20,
/* Memory Region has Memory Windows bound to: */
CMD_STAT_REG_BOUND = 0x21,
/* HCA local attached memory not present: */
CMD_STAT_LAM_NOT_PRE = 0x22,
/* Bad management packet (silently discarded): */
CMD_STAT_BAD_PKT = 0x30,
/* More outstanding CQEs in CQ than new CQ size: */
CMD_STAT_BAD_SIZE = 0x40,
/* Multi Function device support required: */
CMD_STAT_MULTI_FUNC_REQ = 0x50,
};
enum {
HCR_IN_PARAM_OFFSET = 0x00,
HCR_IN_MODIFIER_OFFSET = 0x08,
HCR_OUT_PARAM_OFFSET = 0x0c,
HCR_TOKEN_OFFSET = 0x14,
HCR_STATUS_OFFSET = 0x18,
HCR_OPMOD_SHIFT = 12,
HCR_T_BIT = 21,
HCR_E_BIT = 22,
HCR_GO_BIT = 23
};
enum {
GO_BIT_TIMEOUT_MSECS = 10000
};
struct mlx4_cmd_context {
struct completion done;
int result;
int next;
u64 out_param;
u16 token;
u8 fw_status;
};
static int mlx4_master_process_vhcr(struct mlx4_dev *dev, int slave,
struct mlx4_vhcr_cmd *in_vhcr);
static int mlx4_status_to_errno(u8 status)
{
static const int trans_table[] = {
[CMD_STAT_INTERNAL_ERR] = -EIO,
[CMD_STAT_BAD_OP] = -EPERM,
[CMD_STAT_BAD_PARAM] = -EINVAL,
[CMD_STAT_BAD_SYS_STATE] = -ENXIO,
[CMD_STAT_BAD_RESOURCE] = -EBADF,
[CMD_STAT_RESOURCE_BUSY] = -EBUSY,
[CMD_STAT_EXCEED_LIM] = -ENOMEM,
[CMD_STAT_BAD_RES_STATE] = -EBADF,
[CMD_STAT_BAD_INDEX] = -EBADF,
[CMD_STAT_BAD_NVMEM] = -EFAULT,
[CMD_STAT_ICM_ERROR] = -ENFILE,
[CMD_STAT_BAD_QP_STATE] = -EINVAL,
[CMD_STAT_BAD_SEG_PARAM] = -EFAULT,
[CMD_STAT_REG_BOUND] = -EBUSY,
[CMD_STAT_LAM_NOT_PRE] = -EAGAIN,
[CMD_STAT_BAD_PKT] = -EINVAL,
[CMD_STAT_BAD_SIZE] = -ENOMEM,
[CMD_STAT_MULTI_FUNC_REQ] = -EACCES,
};
if (status >= ARRAY_SIZE(trans_table) ||
(status != CMD_STAT_OK && trans_table[status] == 0))
return -EIO;
return trans_table[status];
}
static int comm_pending(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
u32 status = readl(&priv->mfunc.comm->slave_read);
return (swab32(status) >> 31) != priv->cmd.comm_toggle;
}
static void mlx4_comm_cmd_post(struct mlx4_dev *dev, u8 cmd, u16 param)
{
struct mlx4_priv *priv = mlx4_priv(dev);
u32 val;
priv->cmd.comm_toggle ^= 1;
val = param | (cmd << 16) | (priv->cmd.comm_toggle << 31);
__raw_writel((__force u32) cpu_to_be32(val),
&priv->mfunc.comm->slave_write);
mmiowb();
}
static int mlx4_comm_cmd_poll(struct mlx4_dev *dev, u8 cmd, u16 param,
unsigned long timeout)
{
struct mlx4_priv *priv = mlx4_priv(dev);
unsigned long end;
int err = 0;
int ret_from_pending = 0;
/* First, verify that the master reports correct status */
if (comm_pending(dev)) {
mlx4_warn(dev, "Communication channel is not idle."
"my toggle is %d (cmd:0x%x)\n",
priv->cmd.comm_toggle, cmd);
return -EAGAIN;
}
/* Write command */
down(&priv->cmd.poll_sem);
mlx4_comm_cmd_post(dev, cmd, param);
end = msecs_to_jiffies(timeout) + jiffies;
while (comm_pending(dev) && time_before(jiffies, end))
cond_resched();
ret_from_pending = comm_pending(dev);
if (ret_from_pending) {
/* check if the slave is trying to boot in the middle of
* FLR process. The only non-zero result in the RESET command
* is MLX4_DELAY_RESET_SLAVE*/
if ((MLX4_COMM_CMD_RESET == cmd)) {
mlx4_warn(dev, "Got slave FLRed from Communication"
" channel (ret:0x%x)\n", ret_from_pending);
err = MLX4_DELAY_RESET_SLAVE;
} else {
mlx4_warn(dev, "Communication channel timed out\n");
err = -ETIMEDOUT;
}
}
up(&priv->cmd.poll_sem);
return err;
}
static int mlx4_comm_cmd_wait(struct mlx4_dev *dev, u8 op,
u16 param, unsigned long timeout)
{
struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
struct mlx4_cmd_context *context;
int err = 0;
down(&cmd->event_sem);
spin_lock(&cmd->context_lock);
BUG_ON(cmd->free_head < 0);
context = &cmd->context[cmd->free_head];
context->token += cmd->token_mask + 1;
cmd->free_head = context->next;
spin_unlock(&cmd->context_lock);
init_completion(&context->done);
mlx4_comm_cmd_post(dev, op, param);
if (!wait_for_completion_timeout(&context->done,
msecs_to_jiffies(timeout))) {
err = -EBUSY;
goto out;
}
err = context->result;
if (err && context->fw_status != CMD_STAT_MULTI_FUNC_REQ) {
mlx4_err(dev, "command 0x%x failed: fw status = 0x%x\n",
op, context->fw_status);
goto out;
}
out:
spin_lock(&cmd->context_lock);
context->next = cmd->free_head;
cmd->free_head = context - cmd->context;
spin_unlock(&cmd->context_lock);
up(&cmd->event_sem);
return err;
}
static int mlx4_comm_cmd(struct mlx4_dev *dev, u8 cmd, u16 param,
unsigned long timeout)
{
if (mlx4_priv(dev)->cmd.use_events)
return mlx4_comm_cmd_wait(dev, cmd, param, timeout);
return mlx4_comm_cmd_poll(dev, cmd, param, timeout);
}
static int cmd_pending(struct mlx4_dev *dev)
{
u32 status = readl(mlx4_priv(dev)->cmd.hcr + HCR_STATUS_OFFSET);
return (status & swab32(1 << HCR_GO_BIT)) ||
(mlx4_priv(dev)->cmd.toggle ==
!!(status & swab32(1 << HCR_T_BIT)));
}
static int mlx4_cmd_post(struct mlx4_dev *dev, u64 in_param, u64 out_param,
u32 in_modifier, u8 op_modifier, u16 op, u16 token,
int event)
{
struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
u32 __iomem *hcr = cmd->hcr;
int ret = -EAGAIN;
unsigned long end;
mutex_lock(&cmd->hcr_mutex);
end = jiffies;
if (event)
end += msecs_to_jiffies(GO_BIT_TIMEOUT_MSECS);
while (cmd_pending(dev)) {
if (time_after_eq(jiffies, end)) {
mlx4_err(dev, "%s:cmd_pending failed\n", __func__);
goto out;
}
cond_resched();
}
/*
* We use writel (instead of something like memcpy_toio)
* because writes of less than 32 bits to the HCR don't work
* (and some architectures such as ia64 implement memcpy_toio
* in terms of writeb).
*/
__raw_writel((__force u32) cpu_to_be32(in_param >> 32), hcr + 0);
__raw_writel((__force u32) cpu_to_be32(in_param & 0xfffffffful), hcr + 1);
__raw_writel((__force u32) cpu_to_be32(in_modifier), hcr + 2);
__raw_writel((__force u32) cpu_to_be32(out_param >> 32), hcr + 3);
__raw_writel((__force u32) cpu_to_be32(out_param & 0xfffffffful), hcr + 4);
__raw_writel((__force u32) cpu_to_be32(token << 16), hcr + 5);
/* __raw_writel may not order writes. */
wmb();
__raw_writel((__force u32) cpu_to_be32((1 << HCR_GO_BIT) |
(cmd->toggle << HCR_T_BIT) |
(event ? (1 << HCR_E_BIT) : 0) |
(op_modifier << HCR_OPMOD_SHIFT) |
op), hcr + 6);
/*
* Make sure that our HCR writes don't get mixed in with
* writes from another CPU starting a FW command.
*/
mmiowb();
cmd->toggle = cmd->toggle ^ 1;
ret = 0;
out:
mutex_unlock(&cmd->hcr_mutex);
return ret;
}
static int mlx4_slave_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
int out_is_imm, u32 in_modifier, u8 op_modifier,
u16 op, unsigned long timeout)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_vhcr_cmd *vhcr = priv->mfunc.vhcr;
int ret;
down(&priv->cmd.slave_sem);
vhcr->in_param = cpu_to_be64(in_param);
vhcr->out_param = out_param ? cpu_to_be64(*out_param) : 0;
vhcr->in_modifier = cpu_to_be32(in_modifier);
vhcr->opcode = cpu_to_be16((((u16) op_modifier) << 12) | (op & 0xfff));
vhcr->token = cpu_to_be16(CMD_POLL_TOKEN);
vhcr->status = 0;
vhcr->flags = !!(priv->cmd.use_events) << 6;
if (mlx4_is_master(dev)) {
ret = mlx4_master_process_vhcr(dev, dev->caps.function, vhcr);
if (!ret) {
if (out_is_imm) {
if (out_param)
*out_param =
be64_to_cpu(vhcr->out_param);
else {
mlx4_err(dev, "response expected while"
"output mailbox is NULL for "
"command 0x%x\n", op);
vhcr->status = -EINVAL;
}
}
ret = vhcr->status;
}
} else {
ret = mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR_POST, 0,
MLX4_COMM_TIME + timeout);
if (!ret) {
if (out_is_imm) {
if (out_param)
*out_param =
be64_to_cpu(vhcr->out_param);
else {
mlx4_err(dev, "response expected while"
"output mailbox is NULL for "
"command 0x%x\n", op);
vhcr->status = -EINVAL;
}
}
ret = vhcr->status;
} else
mlx4_err(dev, "failed execution of VHCR_POST command"
"opcode 0x%x\n", op);
}
up(&priv->cmd.slave_sem);
return ret;
}
static int mlx4_cmd_poll(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
int out_is_imm, u32 in_modifier, u8 op_modifier,
u16 op, unsigned long timeout)
{
struct mlx4_priv *priv = mlx4_priv(dev);
void __iomem *hcr = priv->cmd.hcr;
int err = 0;
unsigned long end;
u32 stat;
down(&priv->cmd.poll_sem);
err = mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0,
in_modifier, op_modifier, op, CMD_POLL_TOKEN, 0);
if (err)
goto out;
end = msecs_to_jiffies(timeout) + jiffies;
while (cmd_pending(dev) && time_before(jiffies, end))
cond_resched();
if (cmd_pending(dev)) {
err = -ETIMEDOUT;
goto out;
}
if (out_is_imm)
*out_param =
(u64) be32_to_cpu((__force __be32)
__raw_readl(hcr + HCR_OUT_PARAM_OFFSET)) << 32 |
(u64) be32_to_cpu((__force __be32)
__raw_readl(hcr + HCR_OUT_PARAM_OFFSET + 4));
stat = be32_to_cpu((__force __be32)
__raw_readl(hcr + HCR_STATUS_OFFSET)) >> 24;
err = mlx4_status_to_errno(stat);
if (err)
mlx4_err(dev, "command 0x%x failed: fw status = 0x%x\n",
op, stat);
out:
up(&priv->cmd.poll_sem);
return err;
}
void mlx4_cmd_event(struct mlx4_dev *dev, u16 token, u8 status, u64 out_param)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_cmd_context *context =
&priv->cmd.context[token & priv->cmd.token_mask];
/* previously timed out command completing at long last */
if (token != context->token)
return;
context->fw_status = status;
context->result = mlx4_status_to_errno(status);
context->out_param = out_param;
complete(&context->done);
}
static int mlx4_cmd_wait(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
int out_is_imm, u32 in_modifier, u8 op_modifier,
u16 op, unsigned long timeout)
{
struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
struct mlx4_cmd_context *context;
int err = 0;
down(&cmd->event_sem);
spin_lock(&cmd->context_lock);
BUG_ON(cmd->free_head < 0);
context = &cmd->context[cmd->free_head];
context->token += cmd->token_mask + 1;
cmd->free_head = context->next;
spin_unlock(&cmd->context_lock);
init_completion(&context->done);
mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0,
in_modifier, op_modifier, op, context->token, 1);
if (!wait_for_completion_timeout(&context->done,
msecs_to_jiffies(timeout))) {
err = -EBUSY;
goto out;
}
err = context->result;
if (err) {
mlx4_err(dev, "command 0x%x failed: fw status = 0x%x\n",
op, context->fw_status);
goto out;
}
if (out_is_imm)
*out_param = context->out_param;
out:
spin_lock(&cmd->context_lock);
context->next = cmd->free_head;
cmd->free_head = context - cmd->context;
spin_unlock(&cmd->context_lock);
up(&cmd->event_sem);
return err;
}
int __mlx4_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
int out_is_imm, u32 in_modifier, u8 op_modifier,
u16 op, unsigned long timeout, int native)
{
if (!mlx4_is_mfunc(dev) || (native && mlx4_is_master(dev))) {
if (mlx4_priv(dev)->cmd.use_events)
return mlx4_cmd_wait(dev, in_param, out_param,
out_is_imm, in_modifier,
op_modifier, op, timeout);
else
return mlx4_cmd_poll(dev, in_param, out_param,
out_is_imm, in_modifier,
op_modifier, op, timeout);
}
return mlx4_slave_cmd(dev, in_param, out_param, out_is_imm,
in_modifier, op_modifier, op, timeout);
}
EXPORT_SYMBOL_GPL(__mlx4_cmd);
static int mlx4_ARM_COMM_CHANNEL(struct mlx4_dev *dev)
{
return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_ARM_COMM_CHANNEL,
MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
}
static int mlx4_ACCESS_MEM(struct mlx4_dev *dev, u64 master_addr,
int slave, u64 slave_addr,
int size, int is_read)
{
u64 in_param;
u64 out_param;
if ((slave_addr & 0xfff) | (master_addr & 0xfff) |
(slave & ~0x7f) | (size & 0xff)) {
mlx4_err(dev, "Bad access mem params - slave_addr:0x%llx "
"master_addr:0x%llx slave_id:%d size:%d\n",
slave_addr, master_addr, slave, size);
return -EINVAL;
}
if (is_read) {
in_param = (u64) slave | slave_addr;
out_param = (u64) dev->caps.function | master_addr;
} else {
in_param = (u64) dev->caps.function | master_addr;
out_param = (u64) slave | slave_addr;
}
return mlx4_cmd_imm(dev, in_param, &out_param, size, 0,
MLX4_CMD_ACCESS_MEM,
MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
}
int mlx4_DMA_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)
{
u64 in_param;
u64 out_param;
int err;
in_param = cmd->has_inbox ? (u64) inbox->dma : vhcr->in_param;
out_param = cmd->has_outbox ? (u64) outbox->dma : vhcr->out_param;
if (cmd->encode_slave_id) {
in_param &= 0xffffffffffffff00ll;
in_param |= slave;
}
err = __mlx4_cmd(dev, in_param, &out_param, cmd->out_is_imm,
vhcr->in_modifier, vhcr->op_modifier, vhcr->op,
MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
if (cmd->out_is_imm)
vhcr->out_param = out_param;
return err;
}
static struct mlx4_cmd_info cmd_info[] = {
{
.opcode = MLX4_CMD_QUERY_FW,
.has_inbox = false,
.has_outbox = true,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = NULL
},
{
.opcode = MLX4_CMD_QUERY_HCA,
.has_inbox = false,
.has_outbox = true,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = NULL
},
{
.opcode = MLX4_CMD_QUERY_DEV_CAP,
.has_inbox = false,
.has_outbox = true,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = NULL
},
{
.opcode = MLX4_CMD_QUERY_FUNC_CAP,
.has_inbox = false,
.has_outbox = true,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_QUERY_FUNC_CAP_wrapper
},
{
.opcode = MLX4_CMD_QUERY_ADAPTER,
.has_inbox = false,
.has_outbox = true,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = NULL
},
{
.opcode = MLX4_CMD_INIT_PORT,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_INIT_PORT_wrapper
},
{
.opcode = MLX4_CMD_CLOSE_PORT,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_CLOSE_PORT_wrapper
},
{
.opcode = MLX4_CMD_QUERY_PORT,
.has_inbox = false,
.has_outbox = true,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_QUERY_PORT_wrapper
},
{
.opcode = MLX4_CMD_MAP_EQ,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_MAP_EQ_wrapper
},
{
.opcode = MLX4_CMD_SW2HW_EQ,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = true,
.verify = NULL,
.wrapper = mlx4_SW2HW_EQ_wrapper
},
{
.opcode = MLX4_CMD_HW_HEALTH_CHECK,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = NULL
},
{
.opcode = MLX4_CMD_NOP,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = NULL
},
{
.opcode = MLX4_CMD_ALLOC_RES,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = true,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_ALLOC_RES_wrapper
},
{
.opcode = MLX4_CMD_FREE_RES,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_FREE_RES_wrapper
},
{
.opcode = MLX4_CMD_SW2HW_MPT,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = true,
.verify = NULL,
.wrapper = mlx4_SW2HW_MPT_wrapper
},
{
.opcode = MLX4_CMD_QUERY_MPT,
.has_inbox = false,
.has_outbox = true,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_QUERY_MPT_wrapper
},
{
.opcode = MLX4_CMD_HW2SW_MPT,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_HW2SW_MPT_wrapper
},
{
.opcode = MLX4_CMD_READ_MTT,
.has_inbox = false,
.has_outbox = true,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = NULL
},
{
.opcode = MLX4_CMD_WRITE_MTT,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_WRITE_MTT_wrapper
},
{
.opcode = MLX4_CMD_SYNC_TPT,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = NULL
},
{
.opcode = MLX4_CMD_HW2SW_EQ,
.has_inbox = false,
.has_outbox = true,
.out_is_imm = false,
.encode_slave_id = true,
.verify = NULL,
.wrapper = mlx4_HW2SW_EQ_wrapper
},
{
.opcode = MLX4_CMD_QUERY_EQ,
.has_inbox = false,
.has_outbox = true,
.out_is_imm = false,
.encode_slave_id = true,
.verify = NULL,
.wrapper = mlx4_QUERY_EQ_wrapper
},
{
.opcode = MLX4_CMD_SW2HW_CQ,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = true,
.verify = NULL,
.wrapper = mlx4_SW2HW_CQ_wrapper
},
{
.opcode = MLX4_CMD_HW2SW_CQ,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_HW2SW_CQ_wrapper
},
{
.opcode = MLX4_CMD_QUERY_CQ,
.has_inbox = false,
.has_outbox = true,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_QUERY_CQ_wrapper
},
{
.opcode = MLX4_CMD_MODIFY_CQ,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = true,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_MODIFY_CQ_wrapper
},
{
.opcode = MLX4_CMD_SW2HW_SRQ,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = true,
.verify = NULL,
.wrapper = mlx4_SW2HW_SRQ_wrapper
},
{
.opcode = MLX4_CMD_HW2SW_SRQ,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_HW2SW_SRQ_wrapper
},
{
.opcode = MLX4_CMD_QUERY_SRQ,
.has_inbox = false,
.has_outbox = true,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_QUERY_SRQ_wrapper
},
{
.opcode = MLX4_CMD_ARM_SRQ,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_ARM_SRQ_wrapper
},
{
.opcode = MLX4_CMD_RST2INIT_QP,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = true,
.verify = NULL,
.wrapper = mlx4_RST2INIT_QP_wrapper
},
{
.opcode = MLX4_CMD_INIT2INIT_QP,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_GEN_QP_wrapper
},
{
.opcode = MLX4_CMD_INIT2RTR_QP,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_INIT2RTR_QP_wrapper
},
{
.opcode = MLX4_CMD_RTR2RTS_QP,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_GEN_QP_wrapper
},
{
.opcode = MLX4_CMD_RTS2RTS_QP,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_GEN_QP_wrapper
},
{
.opcode = MLX4_CMD_SQERR2RTS_QP,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_GEN_QP_wrapper
},
{
.opcode = MLX4_CMD_2ERR_QP,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_GEN_QP_wrapper
},
{
.opcode = MLX4_CMD_RTS2SQD_QP,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_GEN_QP_wrapper
},
{
.opcode = MLX4_CMD_SQD2SQD_QP,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_GEN_QP_wrapper
},
{
.opcode = MLX4_CMD_SQD2RTS_QP,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_GEN_QP_wrapper
},
{
.opcode = MLX4_CMD_2RST_QP,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_2RST_QP_wrapper
},
{
.opcode = MLX4_CMD_QUERY_QP,
.has_inbox = false,
.has_outbox = true,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_GEN_QP_wrapper
},
{
.opcode = MLX4_CMD_SUSPEND_QP,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_GEN_QP_wrapper
},
{
.opcode = MLX4_CMD_UNSUSPEND_QP,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_GEN_QP_wrapper
},
{
.opcode = MLX4_CMD_QUERY_IF_STAT,
.has_inbox = false,
.has_outbox = true,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_QUERY_IF_STAT_wrapper
},
/* Native multicast commands are not available for guests */
{
.opcode = MLX4_CMD_QP_ATTACH,
.has_inbox = true,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_QP_ATTACH_wrapper
},
{
.opcode = MLX4_CMD_PROMISC,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = mlx4_PROMISC_wrapper
},
{
.opcode = MLX4_CMD_INFORM_FLR_DONE,
.has_inbox = false,
.has_outbox = false,
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = NULL
},
};
static int mlx4_master_process_vhcr(struct mlx4_dev *dev, int slave,
struct mlx4_vhcr_cmd *in_vhcr)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_cmd_info *cmd = NULL;
struct mlx4_vhcr_cmd *vhcr_cmd = in_vhcr ? in_vhcr : priv->mfunc.vhcr;
struct mlx4_vhcr *vhcr;
struct mlx4_cmd_mailbox *inbox = NULL;
struct mlx4_cmd_mailbox *outbox = NULL;
u64 in_param;
u64 out_param;
int ret = 0;
int i;
/* Create sw representation of Virtual HCR */
vhcr = kzalloc(sizeof(struct mlx4_vhcr), GFP_KERNEL);
if (!vhcr)
return -ENOMEM;
/* DMA in the vHCR */
if (!in_vhcr) {
ret = mlx4_ACCESS_MEM(dev, priv->mfunc.vhcr_dma, slave,
priv->mfunc.master.slave_state[slave].vhcr_dma,
ALIGN(sizeof(struct mlx4_vhcr_cmd),
MLX4_ACCESS_MEM_ALIGN), 1);
if (ret) {
mlx4_err(dev, "%s:Failed reading vhcr"
"ret: 0x%x\n", __func__, ret);
kfree(vhcr);
return ret;
}
}
/* Fill SW VHCR fields */
vhcr->in_param = be64_to_cpu(vhcr_cmd->in_param);
vhcr->out_param = be64_to_cpu(vhcr_cmd->out_param);
vhcr->in_modifier = be32_to_cpu(vhcr_cmd->in_modifier);
vhcr->token = be16_to_cpu(vhcr_cmd->token);
vhcr->op = be16_to_cpu(vhcr_cmd->opcode) & 0xfff;
vhcr->op_modifier = (u8) (be16_to_cpu(vhcr_cmd->opcode) >> 12);
vhcr->e_bit = vhcr_cmd->flags & (1 << 6);
/* Lookup command */
for (i = 0; i < ARRAY_SIZE(cmd_info); ++i) {
if (vhcr->op == cmd_info[i].opcode) {
cmd = &cmd_info[i];
break;
}
}
if (!cmd) {
mlx4_err(dev, "Unknown command:0x%x accepted from slave:%d\n",
vhcr->op, slave);
vhcr_cmd->status = -EINVAL;
goto out_status;
}
/* Read inbox */
if (cmd->has_inbox) {
vhcr->in_param &= INBOX_MASK;
inbox = mlx4_alloc_cmd_mailbox(dev);
if (IS_ERR(inbox)) {
ret = PTR_ERR(inbox);
inbox = NULL;
goto out;
}
ret = mlx4_ACCESS_MEM(dev, inbox->dma, slave,
vhcr->in_param,
MLX4_MAILBOX_SIZE, 1);
if (ret) {
mlx4_err(dev, "%s: Failed reading inbox (cmd:0x%x)\n",
__func__, cmd->opcode);
goto out;
}
}
/* Apply permission and bound checks if applicable */
if (cmd->verify && cmd->verify(dev, slave, vhcr, inbox)) {
mlx4_warn(dev, "Command:0x%x from slave: %d failed protection "
"checks for resource_id:%d\n", vhcr->op, slave,
vhcr->in_modifier);
vhcr_cmd->status = -EPERM;
goto out_status;
}
/* Allocate outbox */
if (cmd->has_outbox) {
outbox = mlx4_alloc_cmd_mailbox(dev);
if (IS_ERR(outbox)) {
ret = PTR_ERR(outbox);
outbox = NULL;
goto out;
}
}
/* Execute the command! */
if (cmd->wrapper) {
vhcr_cmd->status = cmd->wrapper(dev, slave, vhcr, inbox, outbox,
cmd);
if (cmd->out_is_imm)
vhcr_cmd->out_param = cpu_to_be64(vhcr->out_param);
} else {
in_param = cmd->has_inbox ? (u64) inbox->dma :
vhcr->in_param;
out_param = cmd->has_outbox ? (u64) outbox->dma :
vhcr->out_param;
vhcr_cmd->status = __mlx4_cmd(dev, in_param, &out_param,
cmd->out_is_imm, vhcr->in_modifier,
vhcr->op_modifier, vhcr->op,
MLX4_CMD_TIME_CLASS_A,
MLX4_CMD_NATIVE);
if (vhcr_cmd->status) {
mlx4_warn(dev, "vhcr command:0x%x slave:%d failed with"
" error:%d, status %d\n",
vhcr->op, slave, vhcr->errno,
vhcr_cmd->status);
ret = vhcr_cmd->status;
goto out;
}
if (cmd->out_is_imm) {
vhcr->out_param = out_param;
vhcr_cmd->out_param = cpu_to_be64(vhcr->out_param);
}
}
/* Write outbox if command completed successfully */
if (cmd->has_outbox && !vhcr->errno) {
ret = mlx4_ACCESS_MEM(dev, outbox->dma, slave,
vhcr->out_param,
MLX4_MAILBOX_SIZE, MLX4_CMD_WRAPPED);
if (ret) {
mlx4_err(dev, "%s:Failed writing outbox\n", __func__);
goto out;
}
}
out_status:
/* DMA back vhcr result */
if (!in_vhcr) {
ret = mlx4_ACCESS_MEM(dev, priv->mfunc.vhcr_dma, slave,
priv->mfunc.master.slave_state[slave].vhcr_dma,
ALIGN(sizeof(struct mlx4_vhcr),
MLX4_ACCESS_MEM_ALIGN),
MLX4_CMD_WRAPPED);
if (ret)
mlx4_err(dev, "%s:Failed writing vhcr result\n",
__func__);
else if (vhcr->e_bit &&
mlx4_GEN_EQE(dev, slave, &priv->mfunc.master.cmd_eqe))
mlx4_warn(dev, "Failed to generate command completion "
"eqe for slave %d\n", slave);
}
out:
kfree(vhcr);
mlx4_free_cmd_mailbox(dev, inbox);
mlx4_free_cmd_mailbox(dev, outbox);
return ret;
}
static void mlx4_master_do_cmd(struct mlx4_dev *dev, int slave, u8 cmd,
u16 param, u8 toggle)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_slave_state *slave_state = priv->mfunc.master.slave_state;
u32 reply;
u32 slave_status = 0;
u8 is_going_down = 0;
slave_state[slave].comm_toggle ^= 1;
reply = (u32) slave_state[slave].comm_toggle << 31;
if (toggle != slave_state[slave].comm_toggle) {
mlx4_warn(dev, "Incorrect toggle %d from slave %d. *** MASTER"
"STATE COMPROMISIED ***\n", toggle, slave);
goto reset_slave;
}
if (cmd == MLX4_COMM_CMD_RESET) {
mlx4_warn(dev, "Received reset from slave:%d\n", slave);
slave_state[slave].active = false;
/*check if we are in the middle of FLR process,
if so return "retry" status to the slave*/
if (MLX4_COMM_CMD_FLR == slave_state[slave].last_cmd) {
slave_status = MLX4_DELAY_RESET_SLAVE;
goto inform_slave_state;
}
/* write the version in the event field */
reply |= mlx4_comm_get_version();
goto reset_slave;
}
/*command from slave in the middle of FLR*/
if (cmd != MLX4_COMM_CMD_RESET &&
MLX4_COMM_CMD_FLR == slave_state[slave].last_cmd) {
mlx4_warn(dev, "slave:%d is Trying to run cmd(0x%x) "
"in the middle of FLR\n", slave, cmd);
return;
}
switch (cmd) {
case MLX4_COMM_CMD_VHCR0:
if (slave_state[slave].last_cmd != MLX4_COMM_CMD_RESET)
goto reset_slave;
slave_state[slave].vhcr_dma = ((u64) param) << 48;
priv->mfunc.master.slave_state[slave].cookie = 0;
mutex_init(&priv->mfunc.master.gen_eqe_mutex[slave]);
break;
case MLX4_COMM_CMD_VHCR1:
if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR0)
goto reset_slave;
slave_state[slave].vhcr_dma |= ((u64) param) << 32;
break;
case MLX4_COMM_CMD_VHCR2:
if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR1)
goto reset_slave;
slave_state[slave].vhcr_dma |= ((u64) param) << 16;
break;
case MLX4_COMM_CMD_VHCR_EN:
if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR2)
goto reset_slave;
slave_state[slave].vhcr_dma |= param;
slave_state[slave].active = true;
break;
case MLX4_COMM_CMD_VHCR_POST:
if ((slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR_EN) &&
(slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR_POST))
goto reset_slave;
down(&priv->cmd.slave_sem);
if (mlx4_master_process_vhcr(dev, slave, NULL)) {
mlx4_err(dev, "Failed processing vhcr for slave:%d,"
" reseting slave.\n", slave);
up(&priv->cmd.slave_sem);
goto reset_slave;
}
up(&priv->cmd.slave_sem);
break;
default:
mlx4_warn(dev, "Bad comm cmd:%d from slave:%d\n", cmd, slave);
goto reset_slave;
}
spin_lock(&priv->mfunc.master.slave_state_lock);
if (!slave_state[slave].is_slave_going_down)
slave_state[slave].last_cmd = cmd;
else
is_going_down = 1;
spin_unlock(&priv->mfunc.master.slave_state_lock);
if (is_going_down) {
mlx4_warn(dev, "Slave is going down aborting command(%d)"
" executing from slave:%d\n",
cmd, slave);
return;
}
__raw_writel((__force u32) cpu_to_be32(reply),
&priv->mfunc.comm[slave].slave_read);
mmiowb();
return;
reset_slave:
/* cleanup any slave resources */
mlx4_delete_all_resources_for_slave(dev, slave);
spin_lock(&priv->mfunc.master.slave_state_lock);
if (!slave_state[slave].is_slave_going_down)
slave_state[slave].last_cmd = MLX4_COMM_CMD_RESET;
spin_unlock(&priv->mfunc.master.slave_state_lock);
/*with slave in the middle of flr, no need to clean resources again.*/
inform_slave_state:
memset(&slave_state[slave].event_eq, 0,
sizeof(struct mlx4_slave_event_eq_info));
__raw_writel((__force u32) cpu_to_be32(reply),
&priv->mfunc.comm[slave].slave_read);
wmb();
}
/* master command processing */
void mlx4_master_comm_channel(struct work_struct *work)
{
struct mlx4_mfunc_master_ctx *master =
container_of(work,
struct mlx4_mfunc_master_ctx,
comm_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;
__be32 *bit_vec;
u32 comm_cmd;
u32 vec;
int i, j, slave;
int toggle;
int served = 0;
int reported = 0;
u32 slt;
bit_vec = master->comm_arm_bit_vector;
for (i = 0; i < COMM_CHANNEL_BIT_ARRAY_SIZE; i++) {
vec = be32_to_cpu(bit_vec[i]);
for (j = 0; j < 32; j++) {
if (!(vec & (1 << j)))
continue;
++reported;
slave = (i * 32) + j;
comm_cmd = swab32(readl(
&mfunc->comm[slave].slave_write));
slt = swab32(readl(&mfunc->comm[slave].slave_read))
>> 31;
toggle = comm_cmd >> 31;
if (toggle != slt) {
if (master->slave_state[slave].comm_toggle
!= slt) {
printk(KERN_INFO "slave %d out of sync."
" read toggle %d, state toggle %d. "
"Resynching.\n", slave, slt,
master->slave_state[slave].comm_toggle);
master->slave_state[slave].comm_toggle =
slt;
}
mlx4_master_do_cmd(dev, slave,
comm_cmd >> 16 & 0xff,
comm_cmd & 0xffff, toggle);
++served;
}
}
}
if (reported && reported != served)
mlx4_warn(dev, "Got command event with bitmask from %d slaves"
" but %d were served\n",
reported, served);
if (mlx4_ARM_COMM_CHANNEL(dev))
mlx4_warn(dev, "Failed to arm comm channel events\n");
}
int mlx4_cmd_init(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
mutex_init(&priv->cmd.hcr_mutex);
sema_init(&priv->cmd.poll_sem, 1);
priv->cmd.use_events = 0;
priv->cmd.toggle = 1;
priv->cmd.hcr = NULL;
priv->mfunc.vhcr = NULL;
if (!mlx4_is_slave(dev)) {
priv->cmd.hcr = ioremap(pci_resource_start(dev->pdev, 0) +
MLX4_HCR_BASE, MLX4_HCR_SIZE);
if (!priv->cmd.hcr) {
mlx4_err(dev, "Couldn't map command register.\n");
return -ENOMEM;
}
}
priv->cmd.pool = pci_pool_create("mlx4_cmd", dev->pdev,
MLX4_MAILBOX_SIZE,
MLX4_MAILBOX_SIZE, 0);
if (!priv->cmd.pool)
goto err_hcr;
return 0;
err_hcr:
if (!mlx4_is_slave(dev))
iounmap(priv->cmd.hcr);
return -ENOMEM;
}
void mlx4_cmd_cleanup(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
pci_pool_destroy(priv->cmd.pool);
if (!mlx4_is_slave(dev))
iounmap(priv->cmd.hcr);
}
/*
* Switch to using events to issue FW commands (can only be called
* after event queue for command events has been initialized).
*/
int mlx4_cmd_use_events(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int i;
int err = 0;
priv->cmd.context = kmalloc(priv->cmd.max_cmds *
sizeof (struct mlx4_cmd_context),
GFP_KERNEL);
if (!priv->cmd.context)
return -ENOMEM;
for (i = 0; i < priv->cmd.max_cmds; ++i) {
priv->cmd.context[i].token = i;
priv->cmd.context[i].next = i + 1;
}
priv->cmd.context[priv->cmd.max_cmds - 1].next = -1;
priv->cmd.free_head = 0;
sema_init(&priv->cmd.event_sem, priv->cmd.max_cmds);
spin_lock_init(&priv->cmd.context_lock);
for (priv->cmd.token_mask = 1;
priv->cmd.token_mask < priv->cmd.max_cmds;
priv->cmd.token_mask <<= 1)
; /* nothing */
--priv->cmd.token_mask;
down(&priv->cmd.poll_sem);
priv->cmd.use_events = 1;
return err;
}
/*
* Switch back to polling (used when shutting down the device)
*/
void mlx4_cmd_use_polling(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int i;
priv->cmd.use_events = 0;
for (i = 0; i < priv->cmd.max_cmds; ++i)
down(&priv->cmd.event_sem);
kfree(priv->cmd.context);
up(&priv->cmd.poll_sem);
}
struct mlx4_cmd_mailbox *mlx4_alloc_cmd_mailbox(struct mlx4_dev *dev)
{
struct mlx4_cmd_mailbox *mailbox;
mailbox = kmalloc(sizeof *mailbox, GFP_KERNEL);
if (!mailbox)
return ERR_PTR(-ENOMEM);
mailbox->buf = pci_pool_alloc(mlx4_priv(dev)->cmd.pool, GFP_KERNEL,
&mailbox->dma);
if (!mailbox->buf) {
kfree(mailbox);
return ERR_PTR(-ENOMEM);
}
return mailbox;
}
EXPORT_SYMBOL_GPL(mlx4_alloc_cmd_mailbox);
void mlx4_free_cmd_mailbox(struct mlx4_dev *dev,
struct mlx4_cmd_mailbox *mailbox)
{
if (!mailbox)
return;
pci_pool_free(mlx4_priv(dev)->cmd.pool, mailbox->buf, mailbox->dma);
kfree(mailbox);
}
EXPORT_SYMBOL_GPL(mlx4_free_cmd_mailbox);
u32 mlx4_comm_get_version(void)
{
return ((u32) CMD_CHAN_IF_REV << 8) | (u32) CMD_CHAN_VER;
}
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