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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 u8 mlx4_errno_to_status(int errno)
- {
- switch (errno) {
- case -EPERM:
- return CMD_STAT_BAD_OP;
- case -EINVAL:
- return CMD_STAT_BAD_PARAM;
- case -ENXIO:
- return CMD_STAT_BAD_SYS_STATE;
- case -EBUSY:
- return CMD_STAT_RESOURCE_BUSY;
- case -ENOMEM:
- return CMD_STAT_EXCEED_LIM;
- case -ENFILE:
- return CMD_STAT_ICM_ERROR;
- default:
- return CMD_STAT_INTERNAL_ERR;
- }
- }
- 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;
- unsigned long end;
- 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:
- /* wait for comm channel ready
- * this is necessary for prevention the race
- * when switching between event to polling mode
- */
- end = msecs_to_jiffies(timeout) + jiffies;
- while (comm_pending(dev) && time_before(jiffies, end))
- cond_resched();
- 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_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 = CMD_STAT_BAD_PARAM;
- }
- }
- ret = mlx4_status_to_errno(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 = CMD_STAT_BAD_PARAM;
- }
- }
- ret = mlx4_status_to_errno(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_SET_PORT,
- .has_inbox = true,
- .has_outbox = false,
- .out_is_imm = false,
- .encode_slave_id = false,
- .verify = NULL,
- .wrapper = mlx4_SET_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
- },
- /* Ethernet specific commands */
- {
- .opcode = MLX4_CMD_SET_VLAN_FLTR,
- .has_inbox = true,
- .has_outbox = false,
- .out_is_imm = false,
- .encode_slave_id = false,
- .verify = NULL,
- .wrapper = mlx4_SET_VLAN_FLTR_wrapper
- },
- {
- .opcode = MLX4_CMD_SET_MCAST_FLTR,
- .has_inbox = false,
- .has_outbox = false,
- .out_is_imm = false,
- .encode_slave_id = false,
- .verify = NULL,
- .wrapper = mlx4_SET_MCAST_FLTR_wrapper
- },
- {
- .opcode = MLX4_CMD_DUMP_ETH_STATS,
- .has_inbox = false,
- .has_outbox = true,
- .out_is_imm = false,
- .encode_slave_id = false,
- .verify = NULL,
- .wrapper = mlx4_DUMP_ETH_STATS_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;
- int err = 0;
- /* 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 = CMD_STAT_BAD_PARAM;
- goto out_status;
- }
- /* Read inbox */
- if (cmd->has_inbox) {
- vhcr->in_param &= INBOX_MASK;
- inbox = mlx4_alloc_cmd_mailbox(dev);
- if (IS_ERR(inbox)) {
- vhcr_cmd->status = CMD_STAT_BAD_SIZE;
- inbox = NULL;
- goto out_status;
- }
- if (mlx4_ACCESS_MEM(dev, inbox->dma, slave,
- vhcr->in_param,
- MLX4_MAILBOX_SIZE, 1)) {
- mlx4_err(dev, "%s: Failed reading inbox (cmd:0x%x)\n",
- __func__, cmd->opcode);
- vhcr_cmd->status = CMD_STAT_INTERNAL_ERR;
- goto out_status;
- }
- }
- /* 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 = CMD_STAT_BAD_OP;
- goto out_status;
- }
- /* Allocate outbox */
- if (cmd->has_outbox) {
- outbox = mlx4_alloc_cmd_mailbox(dev);
- if (IS_ERR(outbox)) {
- vhcr_cmd->status = CMD_STAT_BAD_SIZE;
- outbox = NULL;
- goto out_status;
- }
- }
- /* Execute the command! */
- if (cmd->wrapper) {
- err = 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;
- 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;
- vhcr_cmd->out_param = cpu_to_be64(vhcr->out_param);
- }
- }
- if (err) {
- mlx4_warn(dev, "vhcr command:0x%x slave:%d failed with"
- " error:%d, status %d\n",
- vhcr->op, slave, vhcr->errno, err);
- vhcr_cmd->status = mlx4_errno_to_status(err);
- goto out_status;
- }
- /* Write outbox if command completed successfully */
- if (cmd->has_outbox && !vhcr_cmd->status) {
- ret = mlx4_ACCESS_MEM(dev, outbox->dma, slave,
- vhcr->out_param,
- MLX4_MAILBOX_SIZE, MLX4_CMD_WRAPPED);
- if (ret) {
- /* If we failed to write back the outbox after the
- *command was successfully executed, we must fail this
- * slave, as it is now in undefined state */
- 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;
- int i;
- 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;
- for (i = 0; i < MLX4_EVENT_TYPES_NUM; ++i) {
- slave_state[slave].event_eq[i].eqn = -1;
- slave_state[slave].event_eq[i].token = 0;
- }
- /*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,"
- " resetting 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");
- }
- static int sync_toggles(struct mlx4_dev *dev)
- {
- struct mlx4_priv *priv = mlx4_priv(dev);
- int wr_toggle;
- int rd_toggle;
- unsigned long end;
- wr_toggle = swab32(readl(&priv->mfunc.comm->slave_write)) >> 31;
- end = jiffies + msecs_to_jiffies(5000);
- while (time_before(jiffies, end)) {
- rd_toggle = swab32(readl(&priv->mfunc.comm->slave_read)) >> 31;
- if (rd_toggle == wr_toggle) {
- priv->cmd.comm_toggle = rd_toggle;
- return 0;
- }
- cond_resched();
- }
- /*
- * we could reach here if for example the previous VM using this
- * function misbehaved and left the channel with unsynced state. We
- * should fix this here and give this VM a chance to use a properly
- * synced channel
- */
- mlx4_warn(dev, "recovering from previously mis-behaved VM\n");
- __raw_writel((__force u32) 0, &priv->mfunc.comm->slave_read);
- __raw_writel((__force u32) 0, &priv->mfunc.comm->slave_write);
- priv->cmd.comm_toggle = 0;
- return 0;
- }
- int mlx4_multi_func_init(struct mlx4_dev *dev)
- {
- struct mlx4_priv *priv = mlx4_priv(dev);
- struct mlx4_slave_state *s_state;
- int i, j, err, port;
- priv->mfunc.vhcr = dma_alloc_coherent(&(dev->pdev->dev), PAGE_SIZE,
- &priv->mfunc.vhcr_dma,
- GFP_KERNEL);
- if (!priv->mfunc.vhcr) {
- mlx4_err(dev, "Couldn't allocate vhcr.\n");
- return -ENOMEM;
- }
- if (mlx4_is_master(dev))
- priv->mfunc.comm =
- ioremap(pci_resource_start(dev->pdev, priv->fw.comm_bar) +
- priv->fw.comm_base, MLX4_COMM_PAGESIZE);
- else
- priv->mfunc.comm =
- ioremap(pci_resource_start(dev->pdev, 2) +
- MLX4_SLAVE_COMM_BASE, MLX4_COMM_PAGESIZE);
- if (!priv->mfunc.comm) {
- mlx4_err(dev, "Couldn't map communication vector.\n");
- goto err_vhcr;
- }
- if (mlx4_is_master(dev)) {
- priv->mfunc.master.slave_state =
- kzalloc(dev->num_slaves *
- sizeof(struct mlx4_slave_state), GFP_KERNEL);
- if (!priv->mfunc.master.slave_state)
- goto err_comm;
- for (i = 0; i < dev->num_slaves; ++i) {
- s_state = &priv->mfunc.master.slave_state[i];
- s_state->last_cmd = MLX4_COMM_CMD_RESET;
- for (j = 0; j < MLX4_EVENT_TYPES_NUM; ++j)
- s_state->event_eq[j].eqn = -1;
- __raw_writel((__force u32) 0,
- &priv->mfunc.comm[i].slave_write);
- __raw_writel((__force u32) 0,
- &priv->mfunc.comm[i].slave_read);
- mmiowb();
- for (port = 1; port <= MLX4_MAX_PORTS; port++) {
- s_state->vlan_filter[port] =
- kzalloc(sizeof(struct mlx4_vlan_fltr),
- GFP_KERNEL);
- if (!s_state->vlan_filter[port]) {
- if (--port)
- kfree(s_state->vlan_filter[port]);
- goto err_slaves;
- }
- INIT_LIST_HEAD(&s_state->mcast_filters[port]);
- }
- spin_lock_init(&s_state->lock);
- }
- memset(&priv->mfunc.master.cmd_eqe, 0, sizeof(struct mlx4_eqe));
- priv->mfunc.master.cmd_eqe.type = MLX4_EVENT_TYPE_CMD;
- INIT_WORK(&priv->mfunc.master.comm_work,
- mlx4_master_comm_channel);
- INIT_WORK(&priv->mfunc.master.slave_event_work,
- mlx4_gen_slave_eqe);
- INIT_WORK(&priv->mfunc.master.slave_flr_event_work,
- mlx4_master_handle_slave_flr);
- spin_lock_init(&priv->mfunc.master.slave_state_lock);
- priv->mfunc.master.comm_wq =
- create_singlethread_workqueue("mlx4_comm");
- if (!priv->mfunc.master.comm_wq)
- goto err_slaves;
- if (mlx4_init_resource_tracker(dev))
- goto err_thread;
- sema_init(&priv->cmd.slave_sem, 1);
- err = mlx4_ARM_COMM_CHANNEL(dev);
- if (err) {
- mlx4_err(dev, " Failed to arm comm channel eq: %x\n",
- err);
- goto err_resource;
- }
- } else {
- err = sync_toggles(dev);
- if (err) {
- mlx4_err(dev, "Couldn't sync toggles\n");
- goto err_comm;
- }
- sema_init(&priv->cmd.slave_sem, 1);
- }
- return 0;
- err_resource:
- mlx4_free_resource_tracker(dev);
- err_thread:
- flush_workqueue(priv->mfunc.master.comm_wq);
- destroy_workqueue(priv->mfunc.master.comm_wq);
- err_slaves:
- while (--i) {
- for (port = 1; port <= MLX4_MAX_PORTS; port++)
- kfree(priv->mfunc.master.slave_state[i].vlan_filter[port]);
- }
- kfree(priv->mfunc.master.slave_state);
- err_comm:
- iounmap(priv->mfunc.comm);
- err_vhcr:
- dma_free_coherent(&(dev->pdev->dev), PAGE_SIZE,
- priv->mfunc.vhcr,
- priv->mfunc.vhcr_dma);
- priv->mfunc.vhcr = NULL;
- return -ENOMEM;
- }
- 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_multi_func_cleanup(struct mlx4_dev *dev)
- {
- struct mlx4_priv *priv = mlx4_priv(dev);
- int i, port;
- if (mlx4_is_master(dev)) {
- flush_workqueue(priv->mfunc.master.comm_wq);
- destroy_workqueue(priv->mfunc.master.comm_wq);
- for (i = 0; i < dev->num_slaves; i++) {
- for (port = 1; port <= MLX4_MAX_PORTS; port++)
- kfree(priv->mfunc.master.slave_state[i].vlan_filter[port]);
- }
- kfree(priv->mfunc.master.slave_state);
- }
- iounmap(priv->mfunc.comm);
- dma_free_coherent(&(dev->pdev->dev), PAGE_SIZE,
- priv->mfunc.vhcr, priv->mfunc.vhcr_dma);
- priv->mfunc.vhcr = NULL;
- }
- 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;
- }
|