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* Copyright (c) 2013-2015, Mellanox Technologies. 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/module.h>
#include <linux/mlx5/driver.h>
#include <linux/mlx5/cmd.h>
#include "mlx5_core.h"
#ifdef CONFIG_MLX5_CORE_EN
#include "eswitch.h"
#endif
enum {
MLX5_EQE_SIZE = sizeof(struct mlx5_eqe),
MLX5_EQE_OWNER_INIT_VAL = 0x1,
};
enum {
MLX5_EQ_STATE_ARMED = 0x9,
MLX5_EQ_STATE_FIRED = 0xa,
MLX5_EQ_STATE_ALWAYS_ARMED = 0xb,
};
enum {
MLX5_NUM_SPARE_EQE = 0x80,
MLX5_NUM_ASYNC_EQE = 0x100,
MLX5_NUM_CMD_EQE = 32,
};
enum {
MLX5_EQ_DOORBEL_OFFSET = 0x40,
};
#define MLX5_ASYNC_EVENT_MASK ((1ull << MLX5_EVENT_TYPE_PATH_MIG) | \
(1ull << MLX5_EVENT_TYPE_COMM_EST) | \
(1ull << MLX5_EVENT_TYPE_SQ_DRAINED) | \
(1ull << MLX5_EVENT_TYPE_CQ_ERROR) | \
(1ull << MLX5_EVENT_TYPE_WQ_CATAS_ERROR) | \
(1ull << MLX5_EVENT_TYPE_PATH_MIG_FAILED) | \
(1ull << MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \
(1ull << MLX5_EVENT_TYPE_WQ_ACCESS_ERROR) | \
(1ull << MLX5_EVENT_TYPE_PORT_CHANGE) | \
(1ull << MLX5_EVENT_TYPE_SRQ_CATAS_ERROR) | \
(1ull << MLX5_EVENT_TYPE_SRQ_LAST_WQE) | \
(1ull << MLX5_EVENT_TYPE_SRQ_RQ_LIMIT))
struct map_eq_in {
u64 mask;
u32 reserved;
u32 unmap_eqn;
};
struct cre_des_eq {
u8 reserved[15];
u8 eqn;
};
static int mlx5_cmd_destroy_eq(struct mlx5_core_dev *dev, u8 eqn)
{
u32 out[MLX5_ST_SZ_DW(destroy_eq_out)] = {0};
u32 in[MLX5_ST_SZ_DW(destroy_eq_in)] = {0};
MLX5_SET(destroy_eq_in, in, opcode, MLX5_CMD_OP_DESTROY_EQ);
MLX5_SET(destroy_eq_in, in, eq_number, eqn);
return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
}
static struct mlx5_eqe *get_eqe(struct mlx5_eq *eq, u32 entry)
{
return mlx5_buf_offset(&eq->buf, entry * MLX5_EQE_SIZE);
}
static struct mlx5_eqe *next_eqe_sw(struct mlx5_eq *eq)
{
struct mlx5_eqe *eqe = get_eqe(eq, eq->cons_index & (eq->nent - 1));
return ((eqe->owner & 1) ^ !!(eq->cons_index & eq->nent)) ? NULL : eqe;
}
static const char *eqe_type_str(u8 type)
{
switch (type) {
case MLX5_EVENT_TYPE_COMP:
return "MLX5_EVENT_TYPE_COMP";
case MLX5_EVENT_TYPE_PATH_MIG:
return "MLX5_EVENT_TYPE_PATH_MIG";
case MLX5_EVENT_TYPE_COMM_EST:
return "MLX5_EVENT_TYPE_COMM_EST";
case MLX5_EVENT_TYPE_SQ_DRAINED:
return "MLX5_EVENT_TYPE_SQ_DRAINED";
case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
return "MLX5_EVENT_TYPE_SRQ_LAST_WQE";
case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
return "MLX5_EVENT_TYPE_SRQ_RQ_LIMIT";
case MLX5_EVENT_TYPE_CQ_ERROR:
return "MLX5_EVENT_TYPE_CQ_ERROR";
case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
return "MLX5_EVENT_TYPE_WQ_CATAS_ERROR";
case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
return "MLX5_EVENT_TYPE_PATH_MIG_FAILED";
case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
return "MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR";
case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
return "MLX5_EVENT_TYPE_WQ_ACCESS_ERROR";
case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
return "MLX5_EVENT_TYPE_SRQ_CATAS_ERROR";
case MLX5_EVENT_TYPE_INTERNAL_ERROR:
return "MLX5_EVENT_TYPE_INTERNAL_ERROR";
case MLX5_EVENT_TYPE_PORT_CHANGE:
return "MLX5_EVENT_TYPE_PORT_CHANGE";
case MLX5_EVENT_TYPE_GPIO_EVENT:
return "MLX5_EVENT_TYPE_GPIO_EVENT";
case MLX5_EVENT_TYPE_REMOTE_CONFIG:
return "MLX5_EVENT_TYPE_REMOTE_CONFIG";
case MLX5_EVENT_TYPE_DB_BF_CONGESTION:
return "MLX5_EVENT_TYPE_DB_BF_CONGESTION";
case MLX5_EVENT_TYPE_STALL_EVENT:
return "MLX5_EVENT_TYPE_STALL_EVENT";
case MLX5_EVENT_TYPE_CMD:
return "MLX5_EVENT_TYPE_CMD";
case MLX5_EVENT_TYPE_PAGE_REQUEST:
return "MLX5_EVENT_TYPE_PAGE_REQUEST";
case MLX5_EVENT_TYPE_PAGE_FAULT:
return "MLX5_EVENT_TYPE_PAGE_FAULT";
default:
return "Unrecognized event";
}
}
static enum mlx5_dev_event port_subtype_event(u8 subtype)
{
switch (subtype) {
case MLX5_PORT_CHANGE_SUBTYPE_DOWN:
return MLX5_DEV_EVENT_PORT_DOWN;
case MLX5_PORT_CHANGE_SUBTYPE_ACTIVE:
return MLX5_DEV_EVENT_PORT_UP;
case MLX5_PORT_CHANGE_SUBTYPE_INITIALIZED:
return MLX5_DEV_EVENT_PORT_INITIALIZED;
case MLX5_PORT_CHANGE_SUBTYPE_LID:
return MLX5_DEV_EVENT_LID_CHANGE;
case MLX5_PORT_CHANGE_SUBTYPE_PKEY:
return MLX5_DEV_EVENT_PKEY_CHANGE;
case MLX5_PORT_CHANGE_SUBTYPE_GUID:
return MLX5_DEV_EVENT_GUID_CHANGE;
case MLX5_PORT_CHANGE_SUBTYPE_CLIENT_REREG:
return MLX5_DEV_EVENT_CLIENT_REREG;
}
return -1;
}
static void eq_update_ci(struct mlx5_eq *eq, int arm)
{
__be32 __iomem *addr = eq->doorbell + (arm ? 0 : 2);
u32 val = (eq->cons_index & 0xffffff) | (eq->eqn << 24);
__raw_writel((__force u32) cpu_to_be32(val), addr);
/* We still want ordering, just not swabbing, so add a barrier */
mb();
}
static int mlx5_eq_int(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
{
struct mlx5_eqe *eqe;
int eqes_found = 0;
int set_ci = 0;
u32 cqn = -1;
u32 rsn;
u8 port;
while ((eqe = next_eqe_sw(eq))) {
/*
* Make sure we read EQ entry contents after we've
* checked the ownership bit.
*/
dma_rmb();
mlx5_core_dbg(eq->dev, "eqn %d, eqe type %s\n",
eq->eqn, eqe_type_str(eqe->type));
switch (eqe->type) {
case MLX5_EVENT_TYPE_COMP:
cqn = be32_to_cpu(eqe->data.comp.cqn) & 0xffffff;
mlx5_cq_completion(dev, cqn);
break;
case MLX5_EVENT_TYPE_PATH_MIG:
case MLX5_EVENT_TYPE_COMM_EST:
case MLX5_EVENT_TYPE_SQ_DRAINED:
case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
rsn = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff;
rsn |= (eqe->data.qp_srq.type << MLX5_USER_INDEX_LEN);
mlx5_core_dbg(dev, "event %s(%d) arrived on resource 0x%x\n",
eqe_type_str(eqe->type), eqe->type, rsn);
mlx5_rsc_event(dev, rsn, eqe->type);
break;
case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
rsn = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff;
mlx5_core_dbg(dev, "SRQ event %s(%d): srqn 0x%x\n",
eqe_type_str(eqe->type), eqe->type, rsn);
mlx5_srq_event(dev, rsn, eqe->type);
break;
case MLX5_EVENT_TYPE_CMD:
mlx5_cmd_comp_handler(dev, be32_to_cpu(eqe->data.cmd.vector), false);
break;
case MLX5_EVENT_TYPE_PORT_CHANGE:
port = (eqe->data.port.port >> 4) & 0xf;
switch (eqe->sub_type) {
case MLX5_PORT_CHANGE_SUBTYPE_DOWN:
case MLX5_PORT_CHANGE_SUBTYPE_ACTIVE:
case MLX5_PORT_CHANGE_SUBTYPE_LID:
case MLX5_PORT_CHANGE_SUBTYPE_PKEY:
case MLX5_PORT_CHANGE_SUBTYPE_GUID:
case MLX5_PORT_CHANGE_SUBTYPE_CLIENT_REREG:
case MLX5_PORT_CHANGE_SUBTYPE_INITIALIZED:
if (dev->event)
dev->event(dev, port_subtype_event(eqe->sub_type),
(unsigned long)port);
break;
default:
mlx5_core_warn(dev, "Port event with unrecognized subtype: port %d, sub_type %d\n",
port, eqe->sub_type);
}
break;
case MLX5_EVENT_TYPE_CQ_ERROR:
cqn = be32_to_cpu(eqe->data.cq_err.cqn) & 0xffffff;
mlx5_core_warn(dev, "CQ error on CQN 0x%x, syndrom 0x%x\n",
cqn, eqe->data.cq_err.syndrome);
mlx5_cq_event(dev, cqn, eqe->type);
break;
case MLX5_EVENT_TYPE_PAGE_REQUEST:
{
u16 func_id = be16_to_cpu(eqe->data.req_pages.func_id);
s32 npages = be32_to_cpu(eqe->data.req_pages.num_pages);
mlx5_core_dbg(dev, "page request for func 0x%x, npages %d\n",
func_id, npages);
mlx5_core_req_pages_handler(dev, func_id, npages);
}
break;
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
case MLX5_EVENT_TYPE_PAGE_FAULT:
mlx5_eq_pagefault(dev, eqe);
break;
#endif
#ifdef CONFIG_MLX5_CORE_EN
case MLX5_EVENT_TYPE_NIC_VPORT_CHANGE:
mlx5_eswitch_vport_event(dev->priv.eswitch, eqe);
break;
#endif
default:
mlx5_core_warn(dev, "Unhandled event 0x%x on EQ 0x%x\n",
eqe->type, eq->eqn);
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 MLX5_NUM_SPARE_EQE extra
* entries, so we must update our consumer index at
* least that often.
*/
if (unlikely(set_ci >= MLX5_NUM_SPARE_EQE)) {
eq_update_ci(eq, 0);
set_ci = 0;
}
}
eq_update_ci(eq, 1);
if (cqn != -1)
tasklet_schedule(&eq->tasklet_ctx.task);
return eqes_found;
}
static irqreturn_t mlx5_msix_handler(int irq, void *eq_ptr)
{
struct mlx5_eq *eq = eq_ptr;
struct mlx5_core_dev *dev = eq->dev;
mlx5_eq_int(dev, eq);
/* MSI-X vectors always belong to us */
return IRQ_HANDLED;
}
static void init_eq_buf(struct mlx5_eq *eq)
{
struct mlx5_eqe *eqe;
int i;
for (i = 0; i < eq->nent; i++) {
eqe = get_eqe(eq, i);
eqe->owner = MLX5_EQE_OWNER_INIT_VAL;
}
}
int mlx5_create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, u8 vecidx,
int nent, u64 mask, const char *name, struct mlx5_uar *uar)
{
u32 out[MLX5_ST_SZ_DW(create_eq_out)] = {0};
struct mlx5_priv *priv = &dev->priv;
__be64 *pas;
void *eqc;
int inlen;
u32 *in;
int err;
eq->nent = roundup_pow_of_two(nent + MLX5_NUM_SPARE_EQE);
eq->cons_index = 0;
err = mlx5_buf_alloc(dev, eq->nent * MLX5_EQE_SIZE, &eq->buf);
if (err)
return err;
init_eq_buf(eq);
inlen = MLX5_ST_SZ_BYTES(create_eq_in) +
MLX5_FLD_SZ_BYTES(create_eq_in, pas[0]) * eq->buf.npages;
in = mlx5_vzalloc(inlen);
if (!in) {
err = -ENOMEM;
goto err_buf;
}
pas = (__be64 *)MLX5_ADDR_OF(create_eq_in, in, pas);
mlx5_fill_page_array(&eq->buf, pas);
MLX5_SET(create_eq_in, in, opcode, MLX5_CMD_OP_CREATE_EQ);
MLX5_SET64(create_eq_in, in, event_bitmask, mask);
eqc = MLX5_ADDR_OF(create_eq_in, in, eq_context_entry);
MLX5_SET(eqc, eqc, log_eq_size, ilog2(eq->nent));
MLX5_SET(eqc, eqc, uar_page, uar->index);
MLX5_SET(eqc, eqc, intr, vecidx);
MLX5_SET(eqc, eqc, log_page_size,
eq->buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT);
err = mlx5_cmd_exec(dev, in, inlen, out, sizeof(out));
if (err)
goto err_in;
snprintf(priv->irq_info[vecidx].name, MLX5_MAX_IRQ_NAME, "%s@pci:%s",
name, pci_name(dev->pdev));
eq->eqn = MLX5_GET(create_eq_out, out, eq_number);
eq->irqn = priv->msix_arr[vecidx].vector;
eq->dev = dev;
eq->doorbell = uar->map + MLX5_EQ_DOORBEL_OFFSET;
err = request_irq(eq->irqn, mlx5_msix_handler, 0,
priv->irq_info[vecidx].name, eq);
if (err)
goto err_eq;
err = mlx5_debug_eq_add(dev, eq);
if (err)
goto err_irq;
INIT_LIST_HEAD(&eq->tasklet_ctx.list);
INIT_LIST_HEAD(&eq->tasklet_ctx.process_list);
spin_lock_init(&eq->tasklet_ctx.lock);
tasklet_init(&eq->tasklet_ctx.task, mlx5_cq_tasklet_cb,
(unsigned long)&eq->tasklet_ctx);
/* EQs are created in ARMED state
*/
eq_update_ci(eq, 1);
kvfree(in);
return 0;
err_irq:
free_irq(priv->msix_arr[vecidx].vector, eq);
err_eq:
mlx5_cmd_destroy_eq(dev, eq->eqn);
err_in:
kvfree(in);
err_buf:
mlx5_buf_free(dev, &eq->buf);
return err;
}
EXPORT_SYMBOL_GPL(mlx5_create_map_eq);
int mlx5_destroy_unmap_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
{
int err;
mlx5_debug_eq_remove(dev, eq);
free_irq(eq->irqn, eq);
err = mlx5_cmd_destroy_eq(dev, eq->eqn);
if (err)
mlx5_core_warn(dev, "failed to destroy a previously created eq: eqn %d\n",
eq->eqn);
synchronize_irq(eq->irqn);
tasklet_disable(&eq->tasklet_ctx.task);
mlx5_buf_free(dev, &eq->buf);
return err;
}
EXPORT_SYMBOL_GPL(mlx5_destroy_unmap_eq);
u32 mlx5_get_msix_vec(struct mlx5_core_dev *dev, int vecidx)
{
return dev->priv.msix_arr[MLX5_EQ_VEC_ASYNC].vector;
}
int mlx5_eq_init(struct mlx5_core_dev *dev)
{
int err;
spin_lock_init(&dev->priv.eq_table.lock);
err = mlx5_eq_debugfs_init(dev);
return err;
}
void mlx5_eq_cleanup(struct mlx5_core_dev *dev)
{
mlx5_eq_debugfs_cleanup(dev);
}
int mlx5_start_eqs(struct mlx5_core_dev *dev)
{
struct mlx5_eq_table *table = &dev->priv.eq_table;
u32 async_event_mask = MLX5_ASYNC_EVENT_MASK;
int err;
if (MLX5_CAP_GEN(dev, pg))
async_event_mask |= (1ull << MLX5_EVENT_TYPE_PAGE_FAULT);
if (MLX5_CAP_GEN(dev, port_type) == MLX5_CAP_PORT_TYPE_ETH &&
MLX5_CAP_GEN(dev, vport_group_manager) &&
mlx5_core_is_pf(dev))
async_event_mask |= (1ull << MLX5_EVENT_TYPE_NIC_VPORT_CHANGE);
err = mlx5_create_map_eq(dev, &table->cmd_eq, MLX5_EQ_VEC_CMD,
MLX5_NUM_CMD_EQE, 1ull << MLX5_EVENT_TYPE_CMD,
"mlx5_cmd_eq", &dev->priv.uuari.uars[0]);
if (err) {
mlx5_core_warn(dev, "failed to create cmd EQ %d\n", err);
return err;
}
mlx5_cmd_use_events(dev);
err = mlx5_create_map_eq(dev, &table->async_eq, MLX5_EQ_VEC_ASYNC,
MLX5_NUM_ASYNC_EQE, async_event_mask,
"mlx5_async_eq", &dev->priv.uuari.uars[0]);
if (err) {
mlx5_core_warn(dev, "failed to create async EQ %d\n", err);
goto err1;
}
err = mlx5_create_map_eq(dev, &table->pages_eq,
MLX5_EQ_VEC_PAGES,
/* TODO: sriov max_vf + */ 1,
1 << MLX5_EVENT_TYPE_PAGE_REQUEST, "mlx5_pages_eq",
&dev->priv.uuari.uars[0]);
if (err) {
mlx5_core_warn(dev, "failed to create pages EQ %d\n", err);
goto err2;
}
return err;
err2:
mlx5_destroy_unmap_eq(dev, &table->async_eq);
err1:
mlx5_cmd_use_polling(dev);
mlx5_destroy_unmap_eq(dev, &table->cmd_eq);
return err;
}
int mlx5_stop_eqs(struct mlx5_core_dev *dev)
{
struct mlx5_eq_table *table = &dev->priv.eq_table;
int err;
err = mlx5_destroy_unmap_eq(dev, &table->pages_eq);
if (err)
return err;
mlx5_destroy_unmap_eq(dev, &table->async_eq);
mlx5_cmd_use_polling(dev);
err = mlx5_destroy_unmap_eq(dev, &table->cmd_eq);
if (err)
mlx5_cmd_use_events(dev);
return err;
}
int mlx5_core_eq_query(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
u32 *out, int outlen)
{
u32 in[MLX5_ST_SZ_DW(query_eq_in)] = {0};
MLX5_SET(query_eq_in, in, opcode, MLX5_CMD_OP_QUERY_EQ);
MLX5_SET(query_eq_in, in, eq_number, eq->eqn);
return mlx5_cmd_exec(dev, in, sizeof(in), out, outlen);
}
EXPORT_SYMBOL_GPL(mlx5_core_eq_query);
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