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gfiber / kernel / bruno / d0ba0f6a82914e684e5d9ae2cae702bed75670fe / . / drivers / net / ethernet / mellanox / mlx4 / main.c
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/*
* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
* Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
* Copyright (c) 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/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/io-mapping.h>
#include <linux/delay.h>
#include <linux/kmod.h>
#include <linux/mlx4/device.h>
#include <linux/mlx4/doorbell.h>
#include "mlx4.h"
#include "fw.h"
#include "icm.h"
MODULE_AUTHOR("Roland Dreier");
MODULE_DESCRIPTION("Mellanox ConnectX HCA low-level driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(DRV_VERSION);
struct workqueue_struct *mlx4_wq;
#ifdef CONFIG_MLX4_DEBUG
int mlx4_debug_level = 0;
module_param_named(debug_level, mlx4_debug_level, int, 0644);
MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
#endif /* CONFIG_MLX4_DEBUG */
#ifdef CONFIG_PCI_MSI
static int msi_x = 1;
module_param(msi_x, int, 0444);
MODULE_PARM_DESC(msi_x, "attempt to use MSI-X if nonzero");
#else /* CONFIG_PCI_MSI */
#define msi_x (0)
#endif /* CONFIG_PCI_MSI */
static uint8_t num_vfs[3] = {0, 0, 0};
static int num_vfs_argc;
module_param_array(num_vfs, byte , &num_vfs_argc, 0444);
MODULE_PARM_DESC(num_vfs, "enable #num_vfs functions if num_vfs > 0\n"
"num_vfs=port1,port2,port1+2");
static uint8_t probe_vf[3] = {0, 0, 0};
static int probe_vfs_argc;
module_param_array(probe_vf, byte, &probe_vfs_argc, 0444);
MODULE_PARM_DESC(probe_vf, "number of vfs to probe by pf driver (num_vfs > 0)\n"
"probe_vf=port1,port2,port1+2");
int mlx4_log_num_mgm_entry_size = MLX4_DEFAULT_MGM_LOG_ENTRY_SIZE;
module_param_named(log_num_mgm_entry_size,
mlx4_log_num_mgm_entry_size, int, 0444);
MODULE_PARM_DESC(log_num_mgm_entry_size, "log mgm size, that defines the num"
" of qp per mcg, for example:"
" 10 gives 248.range: 7 <="
" log_num_mgm_entry_size <= 12."
" To activate device managed"
" flow steering when available, set to -1");
static bool enable_64b_cqe_eqe = true;
module_param(enable_64b_cqe_eqe, bool, 0444);
MODULE_PARM_DESC(enable_64b_cqe_eqe,
"Enable 64 byte CQEs/EQEs when the FW supports this (default: True)");
#define PF_CONTEXT_BEHAVIOUR_MASK (MLX4_FUNC_CAP_64B_EQE_CQE | \
MLX4_FUNC_CAP_EQE_CQE_STRIDE | \
MLX4_FUNC_CAP_DMFS_A0_STATIC)
#define RESET_PERSIST_MASK_FLAGS (MLX4_FLAG_SRIOV)
static char mlx4_version[] =
DRV_NAME ": Mellanox ConnectX core driver v"
DRV_VERSION " (" DRV_RELDATE ")\n";
static struct mlx4_profile default_profile = {
.num_qp = 1 << 18,
.num_srq = 1 << 16,
.rdmarc_per_qp = 1 << 4,
.num_cq = 1 << 16,
.num_mcg = 1 << 13,
.num_mpt = 1 << 19,
.num_mtt = 1 << 20, /* It is really num mtt segements */
};
static struct mlx4_profile low_mem_profile = {
.num_qp = 1 << 17,
.num_srq = 1 << 6,
.rdmarc_per_qp = 1 << 4,
.num_cq = 1 << 8,
.num_mcg = 1 << 8,
.num_mpt = 1 << 9,
.num_mtt = 1 << 7,
};
static int log_num_mac = 7;
module_param_named(log_num_mac, log_num_mac, int, 0444);
MODULE_PARM_DESC(log_num_mac, "Log2 max number of MACs per ETH port (1-7)");
static int log_num_vlan;
module_param_named(log_num_vlan, log_num_vlan, int, 0444);
MODULE_PARM_DESC(log_num_vlan, "Log2 max number of VLANs per ETH port (0-7)");
/* Log2 max number of VLANs per ETH port (0-7) */
#define MLX4_LOG_NUM_VLANS 7
#define MLX4_MIN_LOG_NUM_VLANS 0
#define MLX4_MIN_LOG_NUM_MAC 1
static bool use_prio;
module_param_named(use_prio, use_prio, bool, 0444);
MODULE_PARM_DESC(use_prio, "Enable steering by VLAN priority on ETH ports (deprecated)");
int log_mtts_per_seg = ilog2(MLX4_MTT_ENTRY_PER_SEG);
module_param_named(log_mtts_per_seg, log_mtts_per_seg, int, 0444);
MODULE_PARM_DESC(log_mtts_per_seg, "Log2 number of MTT entries per segment (1-7)");
static int port_type_array[2] = {MLX4_PORT_TYPE_NONE, MLX4_PORT_TYPE_NONE};
static int arr_argc = 2;
module_param_array(port_type_array, int, &arr_argc, 0444);
MODULE_PARM_DESC(port_type_array, "Array of port types: HW_DEFAULT (0) is default "
"1 for IB, 2 for Ethernet");
struct mlx4_port_config {
struct list_head list;
enum mlx4_port_type port_type[MLX4_MAX_PORTS + 1];
struct pci_dev *pdev;
};
static atomic_t pf_loading = ATOMIC_INIT(0);
int mlx4_check_port_params(struct mlx4_dev *dev,
enum mlx4_port_type *port_type)
{
int i;
if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP)) {
for (i = 0; i < dev->caps.num_ports - 1; i++) {
if (port_type[i] != port_type[i + 1]) {
mlx4_err(dev, "Only same port types supported on this HCA, aborting\n");
return -EINVAL;
}
}
}
for (i = 0; i < dev->caps.num_ports; i++) {
if (!(port_type[i] & dev->caps.supported_type[i+1])) {
mlx4_err(dev, "Requested port type for port %d is not supported on this HCA\n",
i + 1);
return -EINVAL;
}
}
return 0;
}
static void mlx4_set_port_mask(struct mlx4_dev *dev)
{
int i;
for (i = 1; i <= dev->caps.num_ports; ++i)
dev->caps.port_mask[i] = dev->caps.port_type[i];
}
enum {
MLX4_QUERY_FUNC_NUM_SYS_EQS = 1 << 0,
};
static int mlx4_query_func(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
{
int err = 0;
struct mlx4_func func;
if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SYS_EQS) {
err = mlx4_QUERY_FUNC(dev, &func, 0);
if (err) {
mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting.\n");
return err;
}
dev_cap->max_eqs = func.max_eq;
dev_cap->reserved_eqs = func.rsvd_eqs;
dev_cap->reserved_uars = func.rsvd_uars;
err |= MLX4_QUERY_FUNC_NUM_SYS_EQS;
}
return err;
}
static void mlx4_enable_cqe_eqe_stride(struct mlx4_dev *dev)
{
struct mlx4_caps *dev_cap = &dev->caps;
/* FW not supporting or cancelled by user */
if (!(dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_EQE_STRIDE) ||
!(dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_CQE_STRIDE))
return;
/* Must have 64B CQE_EQE enabled by FW to use bigger stride
* When FW has NCSI it may decide not to report 64B CQE/EQEs
*/
if (!(dev_cap->flags & MLX4_DEV_CAP_FLAG_64B_EQE) ||
!(dev_cap->flags & MLX4_DEV_CAP_FLAG_64B_CQE)) {
dev_cap->flags2 &= ~MLX4_DEV_CAP_FLAG2_CQE_STRIDE;
dev_cap->flags2 &= ~MLX4_DEV_CAP_FLAG2_EQE_STRIDE;
return;
}
if (cache_line_size() == 128 || cache_line_size() == 256) {
mlx4_dbg(dev, "Enabling CQE stride cacheLine supported\n");
/* Changing the real data inside CQE size to 32B */
dev_cap->flags &= ~MLX4_DEV_CAP_FLAG_64B_CQE;
dev_cap->flags &= ~MLX4_DEV_CAP_FLAG_64B_EQE;
if (mlx4_is_master(dev))
dev_cap->function_caps |= MLX4_FUNC_CAP_EQE_CQE_STRIDE;
} else {
if (cache_line_size() != 32 && cache_line_size() != 64)
mlx4_dbg(dev, "Disabling CQE stride, cacheLine size unsupported\n");
dev_cap->flags2 &= ~MLX4_DEV_CAP_FLAG2_CQE_STRIDE;
dev_cap->flags2 &= ~MLX4_DEV_CAP_FLAG2_EQE_STRIDE;
}
}
static int _mlx4_dev_port(struct mlx4_dev *dev, int port,
struct mlx4_port_cap *port_cap)
{
dev->caps.vl_cap[port] = port_cap->max_vl;
dev->caps.ib_mtu_cap[port] = port_cap->ib_mtu;
dev->phys_caps.gid_phys_table_len[port] = port_cap->max_gids;
dev->phys_caps.pkey_phys_table_len[port] = port_cap->max_pkeys;
/* set gid and pkey table operating lengths by default
* to non-sriov values
*/
dev->caps.gid_table_len[port] = port_cap->max_gids;
dev->caps.pkey_table_len[port] = port_cap->max_pkeys;
dev->caps.port_width_cap[port] = port_cap->max_port_width;
dev->caps.eth_mtu_cap[port] = port_cap->eth_mtu;
dev->caps.def_mac[port] = port_cap->def_mac;
dev->caps.supported_type[port] = port_cap->supported_port_types;
dev->caps.suggested_type[port] = port_cap->suggested_type;
dev->caps.default_sense[port] = port_cap->default_sense;
dev->caps.trans_type[port] = port_cap->trans_type;
dev->caps.vendor_oui[port] = port_cap->vendor_oui;
dev->caps.wavelength[port] = port_cap->wavelength;
dev->caps.trans_code[port] = port_cap->trans_code;
return 0;
}
static int mlx4_dev_port(struct mlx4_dev *dev, int port,
struct mlx4_port_cap *port_cap)
{
int err = 0;
err = mlx4_QUERY_PORT(dev, port, port_cap);
if (err)
mlx4_err(dev, "QUERY_PORT command failed.\n");
return err;
}
static inline void mlx4_enable_ignore_fcs(struct mlx4_dev *dev)
{
if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_IGNORE_FCS))
return;
if (mlx4_is_mfunc(dev)) {
mlx4_dbg(dev, "SRIOV mode - Disabling Ignore FCS");
dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_IGNORE_FCS;
return;
}
if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP)) {
mlx4_dbg(dev,
"Keep FCS is not supported - Disabling Ignore FCS");
dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_IGNORE_FCS;
return;
}
}
#define MLX4_A0_STEERING_TABLE_SIZE 256
static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
{
int err;
int i;
err = mlx4_QUERY_DEV_CAP(dev, dev_cap);
if (err) {
mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting\n");
return err;
}
mlx4_dev_cap_dump(dev, dev_cap);
if (dev_cap->min_page_sz > PAGE_SIZE) {
mlx4_err(dev, "HCA minimum page size of %d bigger than kernel PAGE_SIZE of %ld, aborting\n",
dev_cap->min_page_sz, PAGE_SIZE);
return -ENODEV;
}
if (dev_cap->num_ports > MLX4_MAX_PORTS) {
mlx4_err(dev, "HCA has %d ports, but we only support %d, aborting\n",
dev_cap->num_ports, MLX4_MAX_PORTS);
return -ENODEV;
}
if (dev_cap->uar_size > pci_resource_len(dev->persist->pdev, 2)) {
mlx4_err(dev, "HCA reported UAR size of 0x%x bigger than PCI resource 2 size of 0x%llx, aborting\n",
dev_cap->uar_size,
(unsigned long long)
pci_resource_len(dev->persist->pdev, 2));
return -ENODEV;
}
dev->caps.num_ports = dev_cap->num_ports;
dev->caps.num_sys_eqs = dev_cap->num_sys_eqs;
dev->phys_caps.num_phys_eqs = dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_SYS_EQS ?
dev->caps.num_sys_eqs :
MLX4_MAX_EQ_NUM;
for (i = 1; i <= dev->caps.num_ports; ++i) {
err = _mlx4_dev_port(dev, i, dev_cap->port_cap + i);
if (err) {
mlx4_err(dev, "QUERY_PORT command failed, aborting\n");
return err;
}
}
dev->caps.uar_page_size = PAGE_SIZE;
dev->caps.num_uars = dev_cap->uar_size / PAGE_SIZE;
dev->caps.local_ca_ack_delay = dev_cap->local_ca_ack_delay;
dev->caps.bf_reg_size = dev_cap->bf_reg_size;
dev->caps.bf_regs_per_page = dev_cap->bf_regs_per_page;
dev->caps.max_sq_sg = dev_cap->max_sq_sg;
dev->caps.max_rq_sg = dev_cap->max_rq_sg;
dev->caps.max_wqes = dev_cap->max_qp_sz;
dev->caps.max_qp_init_rdma = dev_cap->max_requester_per_qp;
dev->caps.max_srq_wqes = dev_cap->max_srq_sz;
dev->caps.max_srq_sge = dev_cap->max_rq_sg - 1;
dev->caps.reserved_srqs = dev_cap->reserved_srqs;
dev->caps.max_sq_desc_sz = dev_cap->max_sq_desc_sz;
dev->caps.max_rq_desc_sz = dev_cap->max_rq_desc_sz;
/*
* Subtract 1 from the limit because we need to allocate a
* spare CQE so the HCA HW can tell the difference between an
* empty CQ and a full CQ.
*/
dev->caps.max_cqes = dev_cap->max_cq_sz - 1;
dev->caps.reserved_cqs = dev_cap->reserved_cqs;
dev->caps.reserved_eqs = dev_cap->reserved_eqs;
dev->caps.reserved_mtts = dev_cap->reserved_mtts;
dev->caps.reserved_mrws = dev_cap->reserved_mrws;
/* The first 128 UARs are used for EQ doorbells */
dev->caps.reserved_uars = max_t(int, 128, dev_cap->reserved_uars);
dev->caps.reserved_pds = dev_cap->reserved_pds;
dev->caps.reserved_xrcds = (dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC) ?
dev_cap->reserved_xrcds : 0;
dev->caps.max_xrcds = (dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC) ?
dev_cap->max_xrcds : 0;
dev->caps.mtt_entry_sz = dev_cap->mtt_entry_sz;
dev->caps.max_msg_sz = dev_cap->max_msg_sz;
dev->caps.page_size_cap = ~(u32) (dev_cap->min_page_sz - 1);
dev->caps.flags = dev_cap->flags;
dev->caps.flags2 = dev_cap->flags2;
dev->caps.bmme_flags = dev_cap->bmme_flags;
dev->caps.reserved_lkey = dev_cap->reserved_lkey;
dev->caps.stat_rate_support = dev_cap->stat_rate_support;
dev->caps.max_gso_sz = dev_cap->max_gso_sz;
dev->caps.max_rss_tbl_sz = dev_cap->max_rss_tbl_sz;
if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_PHV_EN) {
struct mlx4_init_hca_param hca_param;
memset(&hca_param, 0, sizeof(hca_param));
err = mlx4_QUERY_HCA(dev, &hca_param);
/* Turn off PHV_EN flag in case phv_check_en is set.
* phv_check_en is a HW check that parse the packet and verify
* phv bit was reported correctly in the wqe. To allow QinQ
* PHV_EN flag should be set and phv_check_en must be cleared
* otherwise QinQ packets will be drop by the HW.
*/
if (err || hca_param.phv_check_en)
dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_PHV_EN;
}
/* Sense port always allowed on supported devices for ConnectX-1 and -2 */
if (mlx4_priv(dev)->pci_dev_data & MLX4_PCI_DEV_FORCE_SENSE_PORT)
dev->caps.flags |= MLX4_DEV_CAP_FLAG_SENSE_SUPPORT;
/* Don't do sense port on multifunction devices (for now at least) */
if (mlx4_is_mfunc(dev))
dev->caps.flags &= ~MLX4_DEV_CAP_FLAG_SENSE_SUPPORT;
if (mlx4_low_memory_profile()) {
dev->caps.log_num_macs = MLX4_MIN_LOG_NUM_MAC;
dev->caps.log_num_vlans = MLX4_MIN_LOG_NUM_VLANS;
} else {
dev->caps.log_num_macs = log_num_mac;
dev->caps.log_num_vlans = MLX4_LOG_NUM_VLANS;
}
for (i = 1; i <= dev->caps.num_ports; ++i) {
dev->caps.port_type[i] = MLX4_PORT_TYPE_NONE;
if (dev->caps.supported_type[i]) {
/* if only ETH is supported - assign ETH */
if (dev->caps.supported_type[i] == MLX4_PORT_TYPE_ETH)
dev->caps.port_type[i] = MLX4_PORT_TYPE_ETH;
/* if only IB is supported, assign IB */
else if (dev->caps.supported_type[i] ==
MLX4_PORT_TYPE_IB)
dev->caps.port_type[i] = MLX4_PORT_TYPE_IB;
else {
/* if IB and ETH are supported, we set the port
* type according to user selection of port type;
* if user selected none, take the FW hint */
if (port_type_array[i - 1] == MLX4_PORT_TYPE_NONE)
dev->caps.port_type[i] = dev->caps.suggested_type[i] ?
MLX4_PORT_TYPE_ETH : MLX4_PORT_TYPE_IB;
else
dev->caps.port_type[i] = port_type_array[i - 1];
}
}
/*
* Link sensing is allowed on the port if 3 conditions are true:
* 1. Both protocols are supported on the port.
* 2. Different types are supported on the port
* 3. FW declared that it supports link sensing
*/
mlx4_priv(dev)->sense.sense_allowed[i] =
((dev->caps.supported_type[i] == MLX4_PORT_TYPE_AUTO) &&
(dev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP) &&
(dev->caps.flags & MLX4_DEV_CAP_FLAG_SENSE_SUPPORT));
/*
* If "default_sense" bit is set, we move the port to "AUTO" mode
* and perform sense_port FW command to try and set the correct
* port type from beginning
*/
if (mlx4_priv(dev)->sense.sense_allowed[i] && dev->caps.default_sense[i]) {
enum mlx4_port_type sensed_port = MLX4_PORT_TYPE_NONE;
dev->caps.possible_type[i] = MLX4_PORT_TYPE_AUTO;
mlx4_SENSE_PORT(dev, i, &sensed_port);
if (sensed_port != MLX4_PORT_TYPE_NONE)
dev->caps.port_type[i] = sensed_port;
} else {
dev->caps.possible_type[i] = dev->caps.port_type[i];
}
if (dev->caps.log_num_macs > dev_cap->port_cap[i].log_max_macs) {
dev->caps.log_num_macs = dev_cap->port_cap[i].log_max_macs;
mlx4_warn(dev, "Requested number of MACs is too much for port %d, reducing to %d\n",
i, 1 << dev->caps.log_num_macs);
}
if (dev->caps.log_num_vlans > dev_cap->port_cap[i].log_max_vlans) {
dev->caps.log_num_vlans = dev_cap->port_cap[i].log_max_vlans;
mlx4_warn(dev, "Requested number of VLANs is too much for port %d, reducing to %d\n",
i, 1 << dev->caps.log_num_vlans);
}
}
if (mlx4_is_master(dev) && (dev->caps.num_ports == 2) &&
(port_type_array[0] == MLX4_PORT_TYPE_IB) &&
(port_type_array[1] == MLX4_PORT_TYPE_ETH)) {
mlx4_warn(dev,
"Granular QoS per VF not supported with IB/Eth configuration\n");
dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_QOS_VPP;
}
dev->caps.max_counters = dev_cap->max_counters;
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW] = dev_cap->reserved_qps;
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_ETH_ADDR] =
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FC_ADDR] =
(1 << dev->caps.log_num_macs) *
(1 << dev->caps.log_num_vlans) *
dev->caps.num_ports;
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FC_EXCH] = MLX4_NUM_FEXCH;
if (dev_cap->dmfs_high_rate_qpn_base > 0 &&
dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_FS_EN)
dev->caps.dmfs_high_rate_qpn_base = dev_cap->dmfs_high_rate_qpn_base;
else
dev->caps.dmfs_high_rate_qpn_base =
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW];
if (dev_cap->dmfs_high_rate_qpn_range > 0 &&
dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_FS_EN) {
dev->caps.dmfs_high_rate_qpn_range = dev_cap->dmfs_high_rate_qpn_range;
dev->caps.dmfs_high_steer_mode = MLX4_STEERING_DMFS_A0_DEFAULT;
dev->caps.flags2 |= MLX4_DEV_CAP_FLAG2_FS_A0;
} else {
dev->caps.dmfs_high_steer_mode = MLX4_STEERING_DMFS_A0_NOT_SUPPORTED;
dev->caps.dmfs_high_rate_qpn_base =
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW];
dev->caps.dmfs_high_rate_qpn_range = MLX4_A0_STEERING_TABLE_SIZE;
}
dev->caps.rl_caps = dev_cap->rl_caps;
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_RSS_RAW_ETH] =
dev->caps.dmfs_high_rate_qpn_range;
dev->caps.reserved_qps = dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW] +
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_ETH_ADDR] +
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FC_ADDR] +
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FC_EXCH];
dev->caps.sqp_demux = (mlx4_is_master(dev)) ? MLX4_MAX_NUM_SLAVES : 0;
if (!enable_64b_cqe_eqe && !mlx4_is_slave(dev)) {
if (dev_cap->flags &
(MLX4_DEV_CAP_FLAG_64B_CQE | MLX4_DEV_CAP_FLAG_64B_EQE)) {
mlx4_warn(dev, "64B EQEs/CQEs supported by the device but not enabled\n");
dev->caps.flags &= ~MLX4_DEV_CAP_FLAG_64B_CQE;
dev->caps.flags &= ~MLX4_DEV_CAP_FLAG_64B_EQE;
}
if (dev_cap->flags2 &
(MLX4_DEV_CAP_FLAG2_CQE_STRIDE |
MLX4_DEV_CAP_FLAG2_EQE_STRIDE)) {
mlx4_warn(dev, "Disabling EQE/CQE stride per user request\n");
dev_cap->flags2 &= ~MLX4_DEV_CAP_FLAG2_CQE_STRIDE;
dev_cap->flags2 &= ~MLX4_DEV_CAP_FLAG2_EQE_STRIDE;
}
}
if ((dev->caps.flags &
(MLX4_DEV_CAP_FLAG_64B_CQE | MLX4_DEV_CAP_FLAG_64B_EQE)) &&
mlx4_is_master(dev))
dev->caps.function_caps |= MLX4_FUNC_CAP_64B_EQE_CQE;
if (!mlx4_is_slave(dev)) {
mlx4_enable_cqe_eqe_stride(dev);
dev->caps.alloc_res_qp_mask =
(dev->caps.bf_reg_size ? MLX4_RESERVE_ETH_BF_QP : 0) |
MLX4_RESERVE_A0_QP;
if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ETS_CFG) &&
dev->caps.flags & MLX4_DEV_CAP_FLAG_SET_ETH_SCHED) {
mlx4_warn(dev, "Old device ETS support detected\n");
mlx4_warn(dev, "Consider upgrading device FW.\n");
dev->caps.flags2 |= MLX4_DEV_CAP_FLAG2_ETS_CFG;
}
} else {
dev->caps.alloc_res_qp_mask = 0;
}
mlx4_enable_ignore_fcs(dev);
return 0;
}
static int mlx4_get_pcie_dev_link_caps(struct mlx4_dev *dev,
enum pci_bus_speed *speed,
enum pcie_link_width *width)
{
u32 lnkcap1, lnkcap2;
int err1, err2;
#define PCIE_MLW_CAP_SHIFT 4 /* start of MLW mask in link capabilities */
*speed = PCI_SPEED_UNKNOWN;
*width = PCIE_LNK_WIDTH_UNKNOWN;
err1 = pcie_capability_read_dword(dev->persist->pdev, PCI_EXP_LNKCAP,
&lnkcap1);
err2 = pcie_capability_read_dword(dev->persist->pdev, PCI_EXP_LNKCAP2,
&lnkcap2);
if (!err2 && lnkcap2) { /* PCIe r3.0-compliant */
if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
*speed = PCIE_SPEED_8_0GT;
else if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
*speed = PCIE_SPEED_5_0GT;
else if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
*speed = PCIE_SPEED_2_5GT;
}
if (!err1) {
*width = (lnkcap1 & PCI_EXP_LNKCAP_MLW) >> PCIE_MLW_CAP_SHIFT;
if (!lnkcap2) { /* pre-r3.0 */
if (lnkcap1 & PCI_EXP_LNKCAP_SLS_5_0GB)
*speed = PCIE_SPEED_5_0GT;
else if (lnkcap1 & PCI_EXP_LNKCAP_SLS_2_5GB)
*speed = PCIE_SPEED_2_5GT;
}
}
if (*speed == PCI_SPEED_UNKNOWN || *width == PCIE_LNK_WIDTH_UNKNOWN) {
return err1 ? err1 :
err2 ? err2 : -EINVAL;
}
return 0;
}
static void mlx4_check_pcie_caps(struct mlx4_dev *dev)
{
enum pcie_link_width width, width_cap;
enum pci_bus_speed speed, speed_cap;
int err;
#define PCIE_SPEED_STR(speed) \
(speed == PCIE_SPEED_8_0GT ? "8.0GT/s" : \
speed == PCIE_SPEED_5_0GT ? "5.0GT/s" : \
speed == PCIE_SPEED_2_5GT ? "2.5GT/s" : \
"Unknown")
err = mlx4_get_pcie_dev_link_caps(dev, &speed_cap, &width_cap);
if (err) {
mlx4_warn(dev,
"Unable to determine PCIe device BW capabilities\n");
return;
}
err = pcie_get_minimum_link(dev->persist->pdev, &speed, &width);
if (err || speed == PCI_SPEED_UNKNOWN ||
width == PCIE_LNK_WIDTH_UNKNOWN) {
mlx4_warn(dev,
"Unable to determine PCI device chain minimum BW\n");
return;
}
if (width != width_cap || speed != speed_cap)
mlx4_warn(dev,
"PCIe BW is different than device's capability\n");
mlx4_info(dev, "PCIe link speed is %s, device supports %s\n",
PCIE_SPEED_STR(speed), PCIE_SPEED_STR(speed_cap));
mlx4_info(dev, "PCIe link width is x%d, device supports x%d\n",
width, width_cap);
return;
}
/*The function checks if there are live vf, return the num of them*/
static int mlx4_how_many_lives_vf(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_slave_state *s_state;
int i;
int ret = 0;
for (i = 1/*the ppf is 0*/; i < dev->num_slaves; ++i) {
s_state = &priv->mfunc.master.slave_state[i];
if (s_state->active && s_state->last_cmd !=
MLX4_COMM_CMD_RESET) {
mlx4_warn(dev, "%s: slave: %d is still active\n",
__func__, i);
ret++;
}
}
return ret;
}
int mlx4_get_parav_qkey(struct mlx4_dev *dev, u32 qpn, u32 *qkey)
{
u32 qk = MLX4_RESERVED_QKEY_BASE;
if (qpn >= dev->phys_caps.base_tunnel_sqpn + 8 * MLX4_MFUNC_MAX ||
qpn < dev->phys_caps.base_proxy_sqpn)
return -EINVAL;
if (qpn >= dev->phys_caps.base_tunnel_sqpn)
/* tunnel qp */
qk += qpn - dev->phys_caps.base_tunnel_sqpn;
else
qk += qpn - dev->phys_caps.base_proxy_sqpn;
*qkey = qk;
return 0;
}
EXPORT_SYMBOL(mlx4_get_parav_qkey);
void mlx4_sync_pkey_table(struct mlx4_dev *dev, int slave, int port, int i, int val)
{
struct mlx4_priv *priv = container_of(dev, struct mlx4_priv, dev);
if (!mlx4_is_master(dev))
return;
priv->virt2phys_pkey[slave][port - 1][i] = val;
}
EXPORT_SYMBOL(mlx4_sync_pkey_table);
void mlx4_put_slave_node_guid(struct mlx4_dev *dev, int slave, __be64 guid)
{
struct mlx4_priv *priv = container_of(dev, struct mlx4_priv, dev);
if (!mlx4_is_master(dev))
return;
priv->slave_node_guids[slave] = guid;
}
EXPORT_SYMBOL(mlx4_put_slave_node_guid);
__be64 mlx4_get_slave_node_guid(struct mlx4_dev *dev, int slave)
{
struct mlx4_priv *priv = container_of(dev, struct mlx4_priv, dev);
if (!mlx4_is_master(dev))
return 0;
return priv->slave_node_guids[slave];
}
EXPORT_SYMBOL(mlx4_get_slave_node_guid);
int mlx4_is_slave_active(struct mlx4_dev *dev, int slave)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_slave_state *s_slave;
if (!mlx4_is_master(dev))
return 0;
s_slave = &priv->mfunc.master.slave_state[slave];
return !!s_slave->active;
}
EXPORT_SYMBOL(mlx4_is_slave_active);
static void slave_adjust_steering_mode(struct mlx4_dev *dev,
struct mlx4_dev_cap *dev_cap,
struct mlx4_init_hca_param *hca_param)
{
dev->caps.steering_mode = hca_param->steering_mode;
if (dev->caps.steering_mode == MLX4_STEERING_MODE_DEVICE_MANAGED) {
dev->caps.num_qp_per_mgm = dev_cap->fs_max_num_qp_per_entry;
dev->caps.fs_log_max_ucast_qp_range_size =
dev_cap->fs_log_max_ucast_qp_range_size;
} else
dev->caps.num_qp_per_mgm =
4 * ((1 << hca_param->log_mc_entry_sz)/16 - 2);
mlx4_dbg(dev, "Steering mode is: %s\n",
mlx4_steering_mode_str(dev->caps.steering_mode));
}
static int mlx4_slave_cap(struct mlx4_dev *dev)
{
int err;
u32 page_size;
struct mlx4_dev_cap dev_cap;
struct mlx4_func_cap func_cap;
struct mlx4_init_hca_param hca_param;
u8 i;
memset(&hca_param, 0, sizeof(hca_param));
err = mlx4_QUERY_HCA(dev, &hca_param);
if (err) {
mlx4_err(dev, "QUERY_HCA command failed, aborting\n");
return err;
}
/* fail if the hca has an unknown global capability
* at this time global_caps should be always zeroed
*/
if (hca_param.global_caps) {
mlx4_err(dev, "Unknown hca global capabilities\n");
return -ENOSYS;
}
mlx4_log_num_mgm_entry_size = hca_param.log_mc_entry_sz;
dev->caps.hca_core_clock = hca_param.hca_core_clock;
memset(&dev_cap, 0, sizeof(dev_cap));
dev->caps.max_qp_dest_rdma = 1 << hca_param.log_rd_per_qp;
err = mlx4_dev_cap(dev, &dev_cap);
if (err) {
mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting\n");
return err;
}
err = mlx4_QUERY_FW(dev);
if (err)
mlx4_err(dev, "QUERY_FW command failed: could not get FW version\n");
page_size = ~dev->caps.page_size_cap + 1;
mlx4_warn(dev, "HCA minimum page size:%d\n", page_size);
if (page_size > PAGE_SIZE) {
mlx4_err(dev, "HCA minimum page size of %d bigger than kernel PAGE_SIZE of %ld, aborting\n",
page_size, PAGE_SIZE);
return -ENODEV;
}
/* slave gets uar page size from QUERY_HCA fw command */
dev->caps.uar_page_size = 1 << (hca_param.uar_page_sz + 12);
/* TODO: relax this assumption */
if (dev->caps.uar_page_size != PAGE_SIZE) {
mlx4_err(dev, "UAR size:%d != kernel PAGE_SIZE of %ld\n",
dev->caps.uar_page_size, PAGE_SIZE);
return -ENODEV;
}
memset(&func_cap, 0, sizeof(func_cap));
err = mlx4_QUERY_FUNC_CAP(dev, 0, &func_cap);
if (err) {
mlx4_err(dev, "QUERY_FUNC_CAP general command failed, aborting (%d)\n",
err);
return err;
}
if ((func_cap.pf_context_behaviour | PF_CONTEXT_BEHAVIOUR_MASK) !=
PF_CONTEXT_BEHAVIOUR_MASK) {
mlx4_err(dev, "Unknown pf context behaviour %x known flags %x\n",
func_cap.pf_context_behaviour, PF_CONTEXT_BEHAVIOUR_MASK);
return -ENOSYS;
}
dev->caps.num_ports = func_cap.num_ports;
dev->quotas.qp = func_cap.qp_quota;
dev->quotas.srq = func_cap.srq_quota;
dev->quotas.cq = func_cap.cq_quota;
dev->quotas.mpt = func_cap.mpt_quota;
dev->quotas.mtt = func_cap.mtt_quota;
dev->caps.num_qps = 1 << hca_param.log_num_qps;
dev->caps.num_srqs = 1 << hca_param.log_num_srqs;
dev->caps.num_cqs = 1 << hca_param.log_num_cqs;
dev->caps.num_mpts = 1 << hca_param.log_mpt_sz;
dev->caps.num_eqs = func_cap.max_eq;
dev->caps.reserved_eqs = func_cap.reserved_eq;
dev->caps.reserved_lkey = func_cap.reserved_lkey;
dev->caps.num_pds = MLX4_NUM_PDS;
dev->caps.num_mgms = 0;
dev->caps.num_amgms = 0;
if (dev->caps.num_ports > MLX4_MAX_PORTS) {
mlx4_err(dev, "HCA has %d ports, but we only support %d, aborting\n",
dev->caps.num_ports, MLX4_MAX_PORTS);
return -ENODEV;
}
mlx4_replace_zero_macs(dev);
dev->caps.qp0_qkey = kcalloc(dev->caps.num_ports, sizeof(u32), GFP_KERNEL);
dev->caps.qp0_tunnel = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
dev->caps.qp0_proxy = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
dev->caps.qp1_tunnel = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
dev->caps.qp1_proxy = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
if (!dev->caps.qp0_tunnel || !dev->caps.qp0_proxy ||
!dev->caps.qp1_tunnel || !dev->caps.qp1_proxy ||
!dev->caps.qp0_qkey) {
err = -ENOMEM;
goto err_mem;
}
for (i = 1; i <= dev->caps.num_ports; ++i) {
err = mlx4_QUERY_FUNC_CAP(dev, i, &func_cap);
if (err) {
mlx4_err(dev, "QUERY_FUNC_CAP port command failed for port %d, aborting (%d)\n",
i, err);
goto err_mem;
}
dev->caps.qp0_qkey[i - 1] = func_cap.qp0_qkey;
dev->caps.qp0_tunnel[i - 1] = func_cap.qp0_tunnel_qpn;
dev->caps.qp0_proxy[i - 1] = func_cap.qp0_proxy_qpn;
dev->caps.qp1_tunnel[i - 1] = func_cap.qp1_tunnel_qpn;
dev->caps.qp1_proxy[i - 1] = func_cap.qp1_proxy_qpn;
dev->caps.port_mask[i] = dev->caps.port_type[i];
dev->caps.phys_port_id[i] = func_cap.phys_port_id;
err = mlx4_get_slave_pkey_gid_tbl_len(dev, i,
&dev->caps.gid_table_len[i],
&dev->caps.pkey_table_len[i]);
if (err)
goto err_mem;
}
if (dev->caps.uar_page_size * (dev->caps.num_uars -
dev->caps.reserved_uars) >
pci_resource_len(dev->persist->pdev,
2)) {
mlx4_err(dev, "HCA reported UAR region size of 0x%x bigger than PCI resource 2 size of 0x%llx, aborting\n",
dev->caps.uar_page_size * dev->caps.num_uars,
(unsigned long long)
pci_resource_len(dev->persist->pdev, 2));
err = -ENOMEM;
goto err_mem;
}
if (hca_param.dev_cap_enabled & MLX4_DEV_CAP_64B_EQE_ENABLED) {
dev->caps.eqe_size = 64;
dev->caps.eqe_factor = 1;
} else {
dev->caps.eqe_size = 32;
dev->caps.eqe_factor = 0;
}
if (hca_param.dev_cap_enabled & MLX4_DEV_CAP_64B_CQE_ENABLED) {
dev->caps.cqe_size = 64;
dev->caps.userspace_caps |= MLX4_USER_DEV_CAP_LARGE_CQE;
} else {
dev->caps.cqe_size = 32;
}
if (hca_param.dev_cap_enabled & MLX4_DEV_CAP_EQE_STRIDE_ENABLED) {
dev->caps.eqe_size = hca_param.eqe_size;
dev->caps.eqe_factor = 0;
}
if (hca_param.dev_cap_enabled & MLX4_DEV_CAP_CQE_STRIDE_ENABLED) {
dev->caps.cqe_size = hca_param.cqe_size;
/* User still need to know when CQE > 32B */
dev->caps.userspace_caps |= MLX4_USER_DEV_CAP_LARGE_CQE;
}
dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_TS;
mlx4_warn(dev, "Timestamping is not supported in slave mode\n");
slave_adjust_steering_mode(dev, &dev_cap, &hca_param);
mlx4_dbg(dev, "RSS support for IP fragments is %s\n",
hca_param.rss_ip_frags ? "on" : "off");
if (func_cap.extra_flags & MLX4_QUERY_FUNC_FLAGS_BF_RES_QP &&
dev->caps.bf_reg_size)
dev->caps.alloc_res_qp_mask |= MLX4_RESERVE_ETH_BF_QP;
if (func_cap.extra_flags & MLX4_QUERY_FUNC_FLAGS_A0_RES_QP)
dev->caps.alloc_res_qp_mask |= MLX4_RESERVE_A0_QP;
return 0;
err_mem:
kfree(dev->caps.qp0_qkey);
kfree(dev->caps.qp0_tunnel);
kfree(dev->caps.qp0_proxy);
kfree(dev->caps.qp1_tunnel);
kfree(dev->caps.qp1_proxy);
dev->caps.qp0_qkey = NULL;
dev->caps.qp0_tunnel = NULL;
dev->caps.qp0_proxy = NULL;
dev->caps.qp1_tunnel = NULL;
dev->caps.qp1_proxy = NULL;
return err;
}
static void mlx4_request_modules(struct mlx4_dev *dev)
{
int port;
int has_ib_port = false;
int has_eth_port = false;
#define EN_DRV_NAME "mlx4_en"
#define IB_DRV_NAME "mlx4_ib"
for (port = 1; port <= dev->caps.num_ports; port++) {
if (dev->caps.port_type[port] == MLX4_PORT_TYPE_IB)
has_ib_port = true;
else if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
has_eth_port = true;
}
if (has_eth_port)
request_module_nowait(EN_DRV_NAME);
if (has_ib_port || (dev->caps.flags & MLX4_DEV_CAP_FLAG_IBOE))
request_module_nowait(IB_DRV_NAME);
}
/*
* Change the port configuration of the device.
* Every user of this function must hold the port mutex.
*/
int mlx4_change_port_types(struct mlx4_dev *dev,
enum mlx4_port_type *port_types)
{
int err = 0;
int change = 0;
int port;
for (port = 0; port < dev->caps.num_ports; port++) {
/* Change the port type only if the new type is different
* from the current, and not set to Auto */
if (port_types[port] != dev->caps.port_type[port + 1])
change = 1;
}
if (change) {
mlx4_unregister_device(dev);
for (port = 1; port <= dev->caps.num_ports; port++) {
mlx4_CLOSE_PORT(dev, port);
dev->caps.port_type[port] = port_types[port - 1];
err = mlx4_SET_PORT(dev, port, -1);
if (err) {
mlx4_err(dev, "Failed to set port %d, aborting\n",
port);
goto out;
}
}
mlx4_set_port_mask(dev);
err = mlx4_register_device(dev);
if (err) {
mlx4_err(dev, "Failed to register device\n");
goto out;
}
mlx4_request_modules(dev);
}
out:
return err;
}
static ssize_t show_port_type(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct mlx4_port_info *info = container_of(attr, struct mlx4_port_info,
port_attr);
struct mlx4_dev *mdev = info->dev;
char type[8];
sprintf(type, "%s",
(mdev->caps.port_type[info->port] == MLX4_PORT_TYPE_IB) ?
"ib" : "eth");
if (mdev->caps.possible_type[info->port] == MLX4_PORT_TYPE_AUTO)
sprintf(buf, "auto (%s)\n", type);
else
sprintf(buf, "%s\n", type);
return strlen(buf);
}
static ssize_t set_port_type(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct mlx4_port_info *info = container_of(attr, struct mlx4_port_info,
port_attr);
struct mlx4_dev *mdev = info->dev;
struct mlx4_priv *priv = mlx4_priv(mdev);
enum mlx4_port_type types[MLX4_MAX_PORTS];
enum mlx4_port_type new_types[MLX4_MAX_PORTS];
static DEFINE_MUTEX(set_port_type_mutex);
int i;
int err = 0;
mutex_lock(&set_port_type_mutex);
if (!strcmp(buf, "ib\n"))
info->tmp_type = MLX4_PORT_TYPE_IB;
else if (!strcmp(buf, "eth\n"))
info->tmp_type = MLX4_PORT_TYPE_ETH;
else if (!strcmp(buf, "auto\n"))
info->tmp_type = MLX4_PORT_TYPE_AUTO;
else {
mlx4_err(mdev, "%s is not supported port type\n", buf);
err = -EINVAL;
goto err_out;
}
mlx4_stop_sense(mdev);
mutex_lock(&priv->port_mutex);
/* Possible type is always the one that was delivered */
mdev->caps.possible_type[info->port] = info->tmp_type;
for (i = 0; i < mdev->caps.num_ports; i++) {
types[i] = priv->port[i+1].tmp_type ? priv->port[i+1].tmp_type :
mdev->caps.possible_type[i+1];
if (types[i] == MLX4_PORT_TYPE_AUTO)
types[i] = mdev->caps.port_type[i+1];
}
if (!(mdev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP) &&
!(mdev->caps.flags & MLX4_DEV_CAP_FLAG_SENSE_SUPPORT)) {
for (i = 1; i <= mdev->caps.num_ports; i++) {
if (mdev->caps.possible_type[i] == MLX4_PORT_TYPE_AUTO) {
mdev->caps.possible_type[i] = mdev->caps.port_type[i];
err = -EINVAL;
}
}
}
if (err) {
mlx4_err(mdev, "Auto sensing is not supported on this HCA. Set only 'eth' or 'ib' for both ports (should be the same)\n");
goto out;
}
mlx4_do_sense_ports(mdev, new_types, types);
err = mlx4_check_port_params(mdev, new_types);
if (err)
goto out;
/* We are about to apply the changes after the configuration
* was verified, no need to remember the temporary types
* any more */
for (i = 0; i < mdev->caps.num_ports; i++)
priv->port[i + 1].tmp_type = 0;
err = mlx4_change_port_types(mdev, new_types);
out:
mlx4_start_sense(mdev);
mutex_unlock(&priv->port_mutex);
err_out:
mutex_unlock(&set_port_type_mutex);
return err ? err : count;
}
enum ibta_mtu {
IB_MTU_256 = 1,
IB_MTU_512 = 2,
IB_MTU_1024 = 3,
IB_MTU_2048 = 4,
IB_MTU_4096 = 5
};
static inline int int_to_ibta_mtu(int mtu)
{
switch (mtu) {
case 256: return IB_MTU_256;
case 512: return IB_MTU_512;
case 1024: return IB_MTU_1024;
case 2048: return IB_MTU_2048;
case 4096: return IB_MTU_4096;
default: return -1;
}
}
static inline int ibta_mtu_to_int(enum ibta_mtu mtu)
{
switch (mtu) {
case IB_MTU_256: return 256;
case IB_MTU_512: return 512;
case IB_MTU_1024: return 1024;
case IB_MTU_2048: return 2048;
case IB_MTU_4096: return 4096;
default: return -1;
}
}
static ssize_t show_port_ib_mtu(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct mlx4_port_info *info = container_of(attr, struct mlx4_port_info,
port_mtu_attr);
struct mlx4_dev *mdev = info->dev;
if (mdev->caps.port_type[info->port] == MLX4_PORT_TYPE_ETH)
mlx4_warn(mdev, "port level mtu is only used for IB ports\n");
sprintf(buf, "%d\n",
ibta_mtu_to_int(mdev->caps.port_ib_mtu[info->port]));
return strlen(buf);
}
static ssize_t set_port_ib_mtu(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct mlx4_port_info *info = container_of(attr, struct mlx4_port_info,
port_mtu_attr);
struct mlx4_dev *mdev = info->dev;
struct mlx4_priv *priv = mlx4_priv(mdev);
int err, port, mtu, ibta_mtu = -1;
if (mdev->caps.port_type[info->port] == MLX4_PORT_TYPE_ETH) {
mlx4_warn(mdev, "port level mtu is only used for IB ports\n");
return -EINVAL;
}
err = kstrtoint(buf, 0, &mtu);
if (!err)
ibta_mtu = int_to_ibta_mtu(mtu);
if (err || ibta_mtu < 0) {
mlx4_err(mdev, "%s is invalid IBTA mtu\n", buf);
return -EINVAL;
}
mdev->caps.port_ib_mtu[info->port] = ibta_mtu;
mlx4_stop_sense(mdev);
mutex_lock(&priv->port_mutex);
mlx4_unregister_device(mdev);
for (port = 1; port <= mdev->caps.num_ports; port++) {
mlx4_CLOSE_PORT(mdev, port);
err = mlx4_SET_PORT(mdev, port, -1);
if (err) {
mlx4_err(mdev, "Failed to set port %d, aborting\n",
port);
goto err_set_port;
}
}
err = mlx4_register_device(mdev);
err_set_port:
mutex_unlock(&priv->port_mutex);
mlx4_start_sense(mdev);
return err ? err : count;
}
int mlx4_bond(struct mlx4_dev *dev)
{
int ret = 0;
struct mlx4_priv *priv = mlx4_priv(dev);
mutex_lock(&priv->bond_mutex);
if (!mlx4_is_bonded(dev))
ret = mlx4_do_bond(dev, true);
else
ret = 0;
mutex_unlock(&priv->bond_mutex);
if (ret)
mlx4_err(dev, "Failed to bond device: %d\n", ret);
else
mlx4_dbg(dev, "Device is bonded\n");
return ret;
}
EXPORT_SYMBOL_GPL(mlx4_bond);
int mlx4_unbond(struct mlx4_dev *dev)
{
int ret = 0;
struct mlx4_priv *priv = mlx4_priv(dev);
mutex_lock(&priv->bond_mutex);
if (mlx4_is_bonded(dev))
ret = mlx4_do_bond(dev, false);
mutex_unlock(&priv->bond_mutex);
if (ret)
mlx4_err(dev, "Failed to unbond device: %d\n", ret);
else
mlx4_dbg(dev, "Device is unbonded\n");
return ret;
}
EXPORT_SYMBOL_GPL(mlx4_unbond);
int mlx4_port_map_set(struct mlx4_dev *dev, struct mlx4_port_map *v2p)
{
u8 port1 = v2p->port1;
u8 port2 = v2p->port2;
struct mlx4_priv *priv = mlx4_priv(dev);
int err;
if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_PORT_REMAP))
return -ENOTSUPP;
mutex_lock(&priv->bond_mutex);
/* zero means keep current mapping for this port */
if (port1 == 0)
port1 = priv->v2p.port1;
if (port2 == 0)
port2 = priv->v2p.port2;
if ((port1 < 1) || (port1 > MLX4_MAX_PORTS) ||
(port2 < 1) || (port2 > MLX4_MAX_PORTS) ||
(port1 == 2 && port2 == 1)) {
/* besides boundary checks cross mapping makes
* no sense and therefore not allowed */
err = -EINVAL;
} else if ((port1 == priv->v2p.port1) &&
(port2 == priv->v2p.port2)) {
err = 0;
} else {
err = mlx4_virt2phy_port_map(dev, port1, port2);
if (!err) {
mlx4_dbg(dev, "port map changed: [%d][%d]\n",
port1, port2);
priv->v2p.port1 = port1;
priv->v2p.port2 = port2;
} else {
mlx4_err(dev, "Failed to change port mape: %d\n", err);
}
}
mutex_unlock(&priv->bond_mutex);
return err;
}
EXPORT_SYMBOL_GPL(mlx4_port_map_set);
static int mlx4_load_fw(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int err;
priv->fw.fw_icm = mlx4_alloc_icm(dev, priv->fw.fw_pages,
GFP_HIGHUSER | __GFP_NOWARN, 0);
if (!priv->fw.fw_icm) {
mlx4_err(dev, "Couldn't allocate FW area, aborting\n");
return -ENOMEM;
}
err = mlx4_MAP_FA(dev, priv->fw.fw_icm);
if (err) {
mlx4_err(dev, "MAP_FA command failed, aborting\n");
goto err_free;
}
err = mlx4_RUN_FW(dev);
if (err) {
mlx4_err(dev, "RUN_FW command failed, aborting\n");
goto err_unmap_fa;
}
return 0;
err_unmap_fa:
mlx4_UNMAP_FA(dev);
err_free:
mlx4_free_icm(dev, priv->fw.fw_icm, 0);
return err;
}
static int mlx4_init_cmpt_table(struct mlx4_dev *dev, u64 cmpt_base,
int cmpt_entry_sz)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int err;
int num_eqs;
err = mlx4_init_icm_table(dev, &priv->qp_table.cmpt_table,
cmpt_base +
((u64) (MLX4_CMPT_TYPE_QP *
cmpt_entry_sz) << MLX4_CMPT_SHIFT),
cmpt_entry_sz, dev->caps.num_qps,
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW],
0, 0);
if (err)
goto err;
err = mlx4_init_icm_table(dev, &priv->srq_table.cmpt_table,
cmpt_base +
((u64) (MLX4_CMPT_TYPE_SRQ *
cmpt_entry_sz) << MLX4_CMPT_SHIFT),
cmpt_entry_sz, dev->caps.num_srqs,
dev->caps.reserved_srqs, 0, 0);
if (err)
goto err_qp;
err = mlx4_init_icm_table(dev, &priv->cq_table.cmpt_table,
cmpt_base +
((u64) (MLX4_CMPT_TYPE_CQ *
cmpt_entry_sz) << MLX4_CMPT_SHIFT),
cmpt_entry_sz, dev->caps.num_cqs,
dev->caps.reserved_cqs, 0, 0);
if (err)
goto err_srq;
num_eqs = dev->phys_caps.num_phys_eqs;
err = mlx4_init_icm_table(dev, &priv->eq_table.cmpt_table,
cmpt_base +
((u64) (MLX4_CMPT_TYPE_EQ *
cmpt_entry_sz) << MLX4_CMPT_SHIFT),
cmpt_entry_sz, num_eqs, num_eqs, 0, 0);
if (err)
goto err_cq;
return 0;
err_cq:
mlx4_cleanup_icm_table(dev, &priv->cq_table.cmpt_table);
err_srq:
mlx4_cleanup_icm_table(dev, &priv->srq_table.cmpt_table);
err_qp:
mlx4_cleanup_icm_table(dev, &priv->qp_table.cmpt_table);
err:
return err;
}
static int mlx4_init_icm(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap,
struct mlx4_init_hca_param *init_hca, u64 icm_size)
{
struct mlx4_priv *priv = mlx4_priv(dev);
u64 aux_pages;
int num_eqs;
int err;
err = mlx4_SET_ICM_SIZE(dev, icm_size, &aux_pages);
if (err) {
mlx4_err(dev, "SET_ICM_SIZE command failed, aborting\n");
return err;
}
mlx4_dbg(dev, "%lld KB of HCA context requires %lld KB aux memory\n",
(unsigned long long) icm_size >> 10,
(unsigned long long) aux_pages << 2);
priv->fw.aux_icm = mlx4_alloc_icm(dev, aux_pages,
GFP_HIGHUSER | __GFP_NOWARN, 0);
if (!priv->fw.aux_icm) {
mlx4_err(dev, "Couldn't allocate aux memory, aborting\n");
return -ENOMEM;
}
err = mlx4_MAP_ICM_AUX(dev, priv->fw.aux_icm);
if (err) {
mlx4_err(dev, "MAP_ICM_AUX command failed, aborting\n");
goto err_free_aux;
}
err = mlx4_init_cmpt_table(dev, init_hca->cmpt_base, dev_cap->cmpt_entry_sz);
if (err) {
mlx4_err(dev, "Failed to map cMPT context memory, aborting\n");
goto err_unmap_aux;
}
num_eqs = dev->phys_caps.num_phys_eqs;
err = mlx4_init_icm_table(dev, &priv->eq_table.table,
init_hca->eqc_base, dev_cap->eqc_entry_sz,
num_eqs, num_eqs, 0, 0);
if (err) {
mlx4_err(dev, "Failed to map EQ context memory, aborting\n");
goto err_unmap_cmpt;
}
/*
* Reserved MTT entries must be aligned up to a cacheline
* boundary, since the FW will write to them, while the driver
* writes to all other MTT entries. (The variable
* dev->caps.mtt_entry_sz below is really the MTT segment
* size, not the raw entry size)
*/
dev->caps.reserved_mtts =
ALIGN(dev->caps.reserved_mtts * dev->caps.mtt_entry_sz,
dma_get_cache_alignment()) / dev->caps.mtt_entry_sz;
err = mlx4_init_icm_table(dev, &priv->mr_table.mtt_table,
init_hca->mtt_base,
dev->caps.mtt_entry_sz,
dev->caps.num_mtts,
dev->caps.reserved_mtts, 1, 0);
if (err) {
mlx4_err(dev, "Failed to map MTT context memory, aborting\n");
goto err_unmap_eq;
}
err = mlx4_init_icm_table(dev, &priv->mr_table.dmpt_table,
init_hca->dmpt_base,
dev_cap->dmpt_entry_sz,
dev->caps.num_mpts,
dev->caps.reserved_mrws, 1, 1);
if (err) {
mlx4_err(dev, "Failed to map dMPT context memory, aborting\n");
goto err_unmap_mtt;
}
err = mlx4_init_icm_table(dev, &priv->qp_table.qp_table,
init_hca->qpc_base,
dev_cap->qpc_entry_sz,
dev->caps.num_qps,
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW],
0, 0);
if (err) {
mlx4_err(dev, "Failed to map QP context memory, aborting\n");
goto err_unmap_dmpt;
}
err = mlx4_init_icm_table(dev, &priv->qp_table.auxc_table,
init_hca->auxc_base,
dev_cap->aux_entry_sz,
dev->caps.num_qps,
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW],
0, 0);
if (err) {
mlx4_err(dev, "Failed to map AUXC context memory, aborting\n");
goto err_unmap_qp;
}
err = mlx4_init_icm_table(dev, &priv->qp_table.altc_table,
init_hca->altc_base,
dev_cap->altc_entry_sz,
dev->caps.num_qps,
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW],
0, 0);
if (err) {
mlx4_err(dev, "Failed to map ALTC context memory, aborting\n");
goto err_unmap_auxc;
}
err = mlx4_init_icm_table(dev, &priv->qp_table.rdmarc_table,
init_hca->rdmarc_base,
dev_cap->rdmarc_entry_sz << priv->qp_table.rdmarc_shift,
dev->caps.num_qps,
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW],
0, 0);
if (err) {
mlx4_err(dev, "Failed to map RDMARC context memory, aborting\n");
goto err_unmap_altc;
}
err = mlx4_init_icm_table(dev, &priv->cq_table.table,
init_hca->cqc_base,
dev_cap->cqc_entry_sz,
dev->caps.num_cqs,
dev->caps.reserved_cqs, 0, 0);
if (err) {
mlx4_err(dev, "Failed to map CQ context memory, aborting\n");
goto err_unmap_rdmarc;
}
err = mlx4_init_icm_table(dev, &priv->srq_table.table,
init_hca->srqc_base,
dev_cap->srq_entry_sz,
dev->caps.num_srqs,
dev->caps.reserved_srqs, 0, 0);
if (err) {
mlx4_err(dev, "Failed to map SRQ context memory, aborting\n");
goto err_unmap_cq;
}
/*
* For flow steering device managed mode it is required to use
* mlx4_init_icm_table. For B0 steering mode it's not strictly
* required, but for simplicity just map the whole multicast
* group table now. The table isn't very big and it's a lot
* easier than trying to track ref counts.
*/
err = mlx4_init_icm_table(dev, &priv->mcg_table.table,
init_hca->mc_base,
mlx4_get_mgm_entry_size(dev),
dev->caps.num_mgms + dev->caps.num_amgms,
dev->caps.num_mgms + dev->caps.num_amgms,
0, 0);
if (err) {
mlx4_err(dev, "Failed to map MCG context memory, aborting\n");
goto err_unmap_srq;
}
return 0;
err_unmap_srq:
mlx4_cleanup_icm_table(dev, &priv->srq_table.table);
err_unmap_cq:
mlx4_cleanup_icm_table(dev, &priv->cq_table.table);
err_unmap_rdmarc:
mlx4_cleanup_icm_table(dev, &priv->qp_table.rdmarc_table);
err_unmap_altc:
mlx4_cleanup_icm_table(dev, &priv->qp_table.altc_table);
err_unmap_auxc:
mlx4_cleanup_icm_table(dev, &priv->qp_table.auxc_table);
err_unmap_qp:
mlx4_cleanup_icm_table(dev, &priv->qp_table.qp_table);
err_unmap_dmpt:
mlx4_cleanup_icm_table(dev, &priv->mr_table.dmpt_table);
err_unmap_mtt:
mlx4_cleanup_icm_table(dev, &priv->mr_table.mtt_table);
err_unmap_eq:
mlx4_cleanup_icm_table(dev, &priv->eq_table.table);
err_unmap_cmpt:
mlx4_cleanup_icm_table(dev, &priv->eq_table.cmpt_table);
mlx4_cleanup_icm_table(dev, &priv->cq_table.cmpt_table);
mlx4_cleanup_icm_table(dev, &priv->srq_table.cmpt_table);
mlx4_cleanup_icm_table(dev, &priv->qp_table.cmpt_table);
err_unmap_aux:
mlx4_UNMAP_ICM_AUX(dev);
err_free_aux:
mlx4_free_icm(dev, priv->fw.aux_icm, 0);
return err;
}
static void mlx4_free_icms(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
mlx4_cleanup_icm_table(dev, &priv->mcg_table.table);
mlx4_cleanup_icm_table(dev, &priv->srq_table.table);
mlx4_cleanup_icm_table(dev, &priv->cq_table.table);
mlx4_cleanup_icm_table(dev, &priv->qp_table.rdmarc_table);
mlx4_cleanup_icm_table(dev, &priv->qp_table.altc_table);
mlx4_cleanup_icm_table(dev, &priv->qp_table.auxc_table);
mlx4_cleanup_icm_table(dev, &priv->qp_table.qp_table);
mlx4_cleanup_icm_table(dev, &priv->mr_table.dmpt_table);
mlx4_cleanup_icm_table(dev, &priv->mr_table.mtt_table);
mlx4_cleanup_icm_table(dev, &priv->eq_table.table);
mlx4_cleanup_icm_table(dev, &priv->eq_table.cmpt_table);
mlx4_cleanup_icm_table(dev, &priv->cq_table.cmpt_table);
mlx4_cleanup_icm_table(dev, &priv->srq_table.cmpt_table);
mlx4_cleanup_icm_table(dev, &priv->qp_table.cmpt_table);
mlx4_UNMAP_ICM_AUX(dev);
mlx4_free_icm(dev, priv->fw.aux_icm, 0);
}
static void mlx4_slave_exit(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
mutex_lock(&priv->cmd.slave_cmd_mutex);
if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_RESET, 0, MLX4_COMM_CMD_NA_OP,
MLX4_COMM_TIME))
mlx4_warn(dev, "Failed to close slave function\n");
mutex_unlock(&priv->cmd.slave_cmd_mutex);
}
static int map_bf_area(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
resource_size_t bf_start;
resource_size_t bf_len;
int err = 0;
if (!dev->caps.bf_reg_size)
return -ENXIO;
bf_start = pci_resource_start(dev->persist->pdev, 2) +
(dev->caps.num_uars << PAGE_SHIFT);
bf_len = pci_resource_len(dev->persist->pdev, 2) -
(dev->caps.num_uars << PAGE_SHIFT);
priv->bf_mapping = io_mapping_create_wc(bf_start, bf_len);
if (!priv->bf_mapping)
err = -ENOMEM;
return err;
}
static void unmap_bf_area(struct mlx4_dev *dev)
{
if (mlx4_priv(dev)->bf_mapping)
io_mapping_free(mlx4_priv(dev)->bf_mapping);
}
cycle_t mlx4_read_clock(struct mlx4_dev *dev)
{
u32 clockhi, clocklo, clockhi1;
cycle_t cycles;
int i;
struct mlx4_priv *priv = mlx4_priv(dev);
for (i = 0; i < 10; i++) {
clockhi = swab32(readl(priv->clock_mapping));
clocklo = swab32(readl(priv->clock_mapping + 4));
clockhi1 = swab32(readl(priv->clock_mapping));
if (clockhi == clockhi1)
break;
}
cycles = (u64) clockhi << 32 | (u64) clocklo;
return cycles;
}
EXPORT_SYMBOL_GPL(mlx4_read_clock);
static int map_internal_clock(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
priv->clock_mapping =
ioremap(pci_resource_start(dev->persist->pdev,
priv->fw.clock_bar) +
priv->fw.clock_offset, MLX4_CLOCK_SIZE);
if (!priv->clock_mapping)
return -ENOMEM;
return 0;
}
int mlx4_get_internal_clock_params(struct mlx4_dev *dev,
struct mlx4_clock_params *params)
{
struct mlx4_priv *priv = mlx4_priv(dev);
if (mlx4_is_slave(dev))
return -ENOTSUPP;
if (!params)
return -EINVAL;
params->bar = priv->fw.clock_bar;
params->offset = priv->fw.clock_offset;
params->size = MLX4_CLOCK_SIZE;
return 0;
}
EXPORT_SYMBOL_GPL(mlx4_get_internal_clock_params);
static void unmap_internal_clock(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
if (priv->clock_mapping)
iounmap(priv->clock_mapping);
}
static void mlx4_close_hca(struct mlx4_dev *dev)
{
unmap_internal_clock(dev);
unmap_bf_area(dev);
if (mlx4_is_slave(dev))
mlx4_slave_exit(dev);
else {
mlx4_CLOSE_HCA(dev, 0);
mlx4_free_icms(dev);
}
}
static void mlx4_close_fw(struct mlx4_dev *dev)
{
if (!mlx4_is_slave(dev)) {
mlx4_UNMAP_FA(dev);
mlx4_free_icm(dev, mlx4_priv(dev)->fw.fw_icm, 0);
}
}
static int mlx4_comm_check_offline(struct mlx4_dev *dev)
{
#define COMM_CHAN_OFFLINE_OFFSET 0x09
u32 comm_flags;
u32 offline_bit;
unsigned long end;
struct mlx4_priv *priv = mlx4_priv(dev);
end = msecs_to_jiffies(MLX4_COMM_OFFLINE_TIME_OUT) + jiffies;
while (time_before(jiffies, end)) {
comm_flags = swab32(readl((__iomem char *)priv->mfunc.comm +
MLX4_COMM_CHAN_FLAGS));
offline_bit = (comm_flags &
(u32)(1 << COMM_CHAN_OFFLINE_OFFSET));
if (!offline_bit)
return 0;
/* There are cases as part of AER/Reset flow that PF needs
* around 100 msec to load. We therefore sleep for 100 msec
* to allow other tasks to make use of that CPU during this
* time interval.
*/
msleep(100);
}
mlx4_err(dev, "Communication channel is offline.\n");
return -EIO;
}
static void mlx4_reset_vf_support(struct mlx4_dev *dev)
{
#define COMM_CHAN_RST_OFFSET 0x1e
struct mlx4_priv *priv = mlx4_priv(dev);
u32 comm_rst;
u32 comm_caps;
comm_caps = swab32(readl((__iomem char *)priv->mfunc.comm +
MLX4_COMM_CHAN_CAPS));
comm_rst = (comm_caps & (u32)(1 << COMM_CHAN_RST_OFFSET));
if (comm_rst)
dev->caps.vf_caps |= MLX4_VF_CAP_FLAG_RESET;
}
static int mlx4_init_slave(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
u64 dma = (u64) priv->mfunc.vhcr_dma;
int ret_from_reset = 0;
u32 slave_read;
u32 cmd_channel_ver;
if (atomic_read(&pf_loading)) {
mlx4_warn(dev, "PF is not ready - Deferring probe\n");
return -EPROBE_DEFER;
}
mutex_lock(&priv->cmd.slave_cmd_mutex);
priv->cmd.max_cmds = 1;
if (mlx4_comm_check_offline(dev)) {
mlx4_err(dev, "PF is not responsive, skipping initialization\n");
goto err_offline;
}
mlx4_reset_vf_support(dev);
mlx4_warn(dev, "Sending reset\n");
ret_from_reset = mlx4_comm_cmd(dev, MLX4_COMM_CMD_RESET, 0,
MLX4_COMM_CMD_NA_OP, MLX4_COMM_TIME);
/* if we are in the middle of flr the slave will try
* NUM_OF_RESET_RETRIES times before leaving.*/
if (ret_from_reset) {
if (MLX4_DELAY_RESET_SLAVE == ret_from_reset) {
mlx4_warn(dev, "slave is currently in the middle of FLR - Deferring probe\n");
mutex_unlock(&priv->cmd.slave_cmd_mutex);
return -EPROBE_DEFER;
} else
goto err;
}
/* check the driver version - the slave I/F revision
* must match the master's */
slave_read = swab32(readl(&priv->mfunc.comm->slave_read));
cmd_channel_ver = mlx4_comm_get_version();
if (MLX4_COMM_GET_IF_REV(cmd_channel_ver) !=
MLX4_COMM_GET_IF_REV(slave_read)) {
mlx4_err(dev, "slave driver version is not supported by the master\n");
goto err;
}
mlx4_warn(dev, "Sending vhcr0\n");
if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR0, dma >> 48,
MLX4_COMM_CMD_NA_OP, MLX4_COMM_TIME))
goto err;
if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR1, dma >> 32,
MLX4_COMM_CMD_NA_OP, MLX4_COMM_TIME))
goto err;
if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR2, dma >> 16,
MLX4_COMM_CMD_NA_OP, MLX4_COMM_TIME))
goto err;
if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR_EN, dma,
MLX4_COMM_CMD_NA_OP, MLX4_COMM_TIME))
goto err;
mutex_unlock(&priv->cmd.slave_cmd_mutex);
return 0;
err:
mlx4_comm_cmd(dev, MLX4_COMM_CMD_RESET, 0, MLX4_COMM_CMD_NA_OP, 0);
err_offline:
mutex_unlock(&priv->cmd.slave_cmd_mutex);
return -EIO;
}
static void mlx4_parav_master_pf_caps(struct mlx4_dev *dev)
{
int i;
for (i = 1; i <= dev->caps.num_ports; i++) {
if (dev->caps.port_type[i] == MLX4_PORT_TYPE_ETH)
dev->caps.gid_table_len[i] =
mlx4_get_slave_num_gids(dev, 0, i);
else
dev->caps.gid_table_len[i] = 1;
dev->caps.pkey_table_len[i] =
dev->phys_caps.pkey_phys_table_len[i] - 1;
}
}
static int choose_log_fs_mgm_entry_size(int qp_per_entry)
{
int i = MLX4_MIN_MGM_LOG_ENTRY_SIZE;
for (i = MLX4_MIN_MGM_LOG_ENTRY_SIZE; i <= MLX4_MAX_MGM_LOG_ENTRY_SIZE;
i++) {
if (qp_per_entry <= 4 * ((1 << i) / 16 - 2))
break;
}
return (i <= MLX4_MAX_MGM_LOG_ENTRY_SIZE) ? i : -1;
}
static const char *dmfs_high_rate_steering_mode_str(int dmfs_high_steer_mode)
{
switch (dmfs_high_steer_mode) {
case MLX4_STEERING_DMFS_A0_DEFAULT:
return "default performance";
case MLX4_STEERING_DMFS_A0_DYNAMIC:
return "dynamic hybrid mode";
case MLX4_STEERING_DMFS_A0_STATIC:
return "performance optimized for limited rule configuration (static)";
case MLX4_STEERING_DMFS_A0_DISABLE:
return "disabled performance optimized steering";
case MLX4_STEERING_DMFS_A0_NOT_SUPPORTED:
return "performance optimized steering not supported";
default:
return "Unrecognized mode";
}
}
#define MLX4_DMFS_A0_STEERING (1UL << 2)
static void choose_steering_mode(struct mlx4_dev *dev,
struct mlx4_dev_cap *dev_cap)
{
if (mlx4_log_num_mgm_entry_size <= 0) {
if ((-mlx4_log_num_mgm_entry_size) & MLX4_DMFS_A0_STEERING) {
if (dev->caps.dmfs_high_steer_mode ==
MLX4_STEERING_DMFS_A0_NOT_SUPPORTED)
mlx4_err(dev, "DMFS high rate mode not supported\n");
else
dev->caps.dmfs_high_steer_mode =
MLX4_STEERING_DMFS_A0_STATIC;
}
}
if (mlx4_log_num_mgm_entry_size <= 0 &&
dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_FS_EN &&
(!mlx4_is_mfunc(dev) ||
(dev_cap->fs_max_num_qp_per_entry >=
(dev->persist->num_vfs + 1))) &&
choose_log_fs_mgm_entry_size(dev_cap->fs_max_num_qp_per_entry) >=
MLX4_MIN_MGM_LOG_ENTRY_SIZE) {
dev->oper_log_mgm_entry_size =
choose_log_fs_mgm_entry_size(dev_cap->fs_max_num_qp_per_entry);
dev->caps.steering_mode = MLX4_STEERING_MODE_DEVICE_MANAGED;
dev->caps.num_qp_per_mgm = dev_cap->fs_max_num_qp_per_entry;
dev->caps.fs_log_max_ucast_qp_range_size =
dev_cap->fs_log_max_ucast_qp_range_size;
} else {
if (dev->caps.dmfs_high_steer_mode !=
MLX4_STEERING_DMFS_A0_NOT_SUPPORTED)
dev->caps.dmfs_high_steer_mode = MLX4_STEERING_DMFS_A0_DISABLE;
if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER &&
dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER)
dev->caps.steering_mode = MLX4_STEERING_MODE_B0;
else {
dev->caps.steering_mode = MLX4_STEERING_MODE_A0;
if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER ||
dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER)
mlx4_warn(dev, "Must have both UC_STEER and MC_STEER flags set to use B0 steering - falling back to A0 steering mode\n");
}
dev->oper_log_mgm_entry_size =
mlx4_log_num_mgm_entry_size > 0 ?
mlx4_log_num_mgm_entry_size :
MLX4_DEFAULT_MGM_LOG_ENTRY_SIZE;
dev->caps.num_qp_per_mgm = mlx4_get_qp_per_mgm(dev);
}
mlx4_dbg(dev, "Steering mode is: %s, oper_log_mgm_entry_size = %d, modparam log_num_mgm_entry_size = %d\n",
mlx4_steering_mode_str(dev->caps.steering_mode),
dev->oper_log_mgm_entry_size,
mlx4_log_num_mgm_entry_size);
}
static void choose_tunnel_offload_mode(struct mlx4_dev *dev,
struct mlx4_dev_cap *dev_cap)
{
if (dev->caps.steering_mode == MLX4_STEERING_MODE_DEVICE_MANAGED &&
dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_VXLAN_OFFLOADS)
dev->caps.tunnel_offload_mode = MLX4_TUNNEL_OFFLOAD_MODE_VXLAN;
else
dev->caps.tunnel_offload_mode = MLX4_TUNNEL_OFFLOAD_MODE_NONE;
mlx4_dbg(dev, "Tunneling offload mode is: %s\n", (dev->caps.tunnel_offload_mode
== MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) ? "vxlan" : "none");
}
static int mlx4_validate_optimized_steering(struct mlx4_dev *dev)
{
int i;
struct mlx4_port_cap port_cap;
if (dev->caps.dmfs_high_steer_mode == MLX4_STEERING_DMFS_A0_NOT_SUPPORTED)
return -EINVAL;
for (i = 1; i <= dev->caps.num_ports; i++) {
if (mlx4_dev_port(dev, i, &port_cap)) {
mlx4_err(dev,
"QUERY_DEV_CAP command failed, can't veify DMFS high rate steering.\n");
} else if ((dev->caps.dmfs_high_steer_mode !=
MLX4_STEERING_DMFS_A0_DEFAULT) &&
(port_cap.dmfs_optimized_state ==
!!(dev->caps.dmfs_high_steer_mode ==
MLX4_STEERING_DMFS_A0_DISABLE))) {
mlx4_err(dev,
"DMFS high rate steer mode differ, driver requested %s but %s in FW.\n",
dmfs_high_rate_steering_mode_str(
dev->caps.dmfs_high_steer_mode),
(port_cap.dmfs_optimized_state ?
"enabled" : "disabled"));
}
}
return 0;
}
static int mlx4_init_fw(struct mlx4_dev *dev)
{
struct mlx4_mod_stat_cfg mlx4_cfg;
int err = 0;
if (!mlx4_is_slave(dev)) {
err = mlx4_QUERY_FW(dev);
if (err) {
if (err == -EACCES)
mlx4_info(dev, "non-primary physical function, skipping\n");
else
mlx4_err(dev, "QUERY_FW command failed, aborting\n");
return err;
}
err = mlx4_load_fw(dev);
if (err) {
mlx4_err(dev, "Failed to start FW, aborting\n");
return err;
}
mlx4_cfg.log_pg_sz_m = 1;
mlx4_cfg.log_pg_sz = 0;
err = mlx4_MOD_STAT_CFG(dev, &mlx4_cfg);
if (err)
mlx4_warn(dev, "Failed to override log_pg_sz parameter\n");
}
return err;
}
static int mlx4_init_hca(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_adapter adapter;
struct mlx4_dev_cap dev_cap;
struct mlx4_profile profile;
struct mlx4_init_hca_param init_hca;
u64 icm_size;
struct mlx4_config_dev_params params;
int err;
if (!mlx4_is_slave(dev)) {
err = mlx4_dev_cap(dev, &dev_cap);
if (err) {
mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting\n");
return err;
}
choose_steering_mode(dev, &dev_cap);
choose_tunnel_offload_mode(dev, &dev_cap);
if (dev->caps.dmfs_high_steer_mode == MLX4_STEERING_DMFS_A0_STATIC &&
mlx4_is_master(dev))
dev->caps.function_caps |= MLX4_FUNC_CAP_DMFS_A0_STATIC;
err = mlx4_get_phys_port_id(dev);
if (err)
mlx4_err(dev, "Fail to get physical port id\n");
if (mlx4_is_master(dev))
mlx4_parav_master_pf_caps(dev);
if (mlx4_low_memory_profile()) {
mlx4_info(dev, "Running from within kdump kernel. Using low memory profile\n");
profile = low_mem_profile;
} else {
profile = default_profile;
}
if (dev->caps.steering_mode ==
MLX4_STEERING_MODE_DEVICE_MANAGED)
profile.num_mcg = MLX4_FS_NUM_MCG;
icm_size = mlx4_make_profile(dev, &profile, &dev_cap,
&init_hca);
if ((long long) icm_size < 0) {
err = icm_size;
return err;
}
dev->caps.max_fmr_maps = (1 << (32 - ilog2(dev->caps.num_mpts))) - 1;
init_hca.log_uar_sz = ilog2(dev->caps.num_uars);
init_hca.uar_page_sz = PAGE_SHIFT - 12;
init_hca.mw_enabled = 0;
if (dev->caps.flags & MLX4_DEV_CAP_FLAG_MEM_WINDOW ||
dev->caps.bmme_flags & MLX4_BMME_FLAG_TYPE_2_WIN)
init_hca.mw_enabled = INIT_HCA_TPT_MW_ENABLE;
err = mlx4_init_icm(dev, &dev_cap, &init_hca, icm_size);
if (err)
return err;
err = mlx4_INIT_HCA(dev, &init_hca);
if (err) {
mlx4_err(dev, "INIT_HCA command failed, aborting\n");
goto err_free_icm;
}
if (dev_cap.flags2 & MLX4_DEV_CAP_FLAG2_SYS_EQS) {
err = mlx4_query_func(dev, &dev_cap);
if (err < 0) {
mlx4_err(dev, "QUERY_FUNC command failed, aborting.\n");
goto err_close;
} else if (err & MLX4_QUERY_FUNC_NUM_SYS_EQS) {
dev->caps.num_eqs = dev_cap.max_eqs;
dev->caps.reserved_eqs = dev_cap.reserved_eqs;
dev->caps.reserved_uars = dev_cap.reserved_uars;
}
}
/*
* If TS is supported by FW
* read HCA frequency by QUERY_HCA command
*/
if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS) {
memset(&init_hca, 0, sizeof(init_hca));
err = mlx4_QUERY_HCA(dev, &init_hca);
if (err) {
mlx4_err(dev, "QUERY_HCA command failed, disable timestamp\n");
dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_TS;
} else {
dev->caps.hca_core_clock =
init_hca.hca_core_clock;
}
/* In case we got HCA frequency 0 - disable timestamping
* to avoid dividing by zero
*/
if (!dev->caps.hca_core_clock) {
dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_TS;
mlx4_err(dev,
"HCA frequency is 0 - timestamping is not supported\n");
} else if (map_internal_clock(dev)) {
/*
* Map internal clock,
* in case of failure disable timestamping
*/
dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_TS;
mlx4_err(dev, "Failed to map internal clock. Timestamping is not supported\n");
}
}
if (dev->caps.dmfs_high_steer_mode !=
MLX4_STEERING_DMFS_A0_NOT_SUPPORTED) {
if (mlx4_validate_optimized_steering(dev))
mlx4_warn(dev, "Optimized steering validation failed\n");
if (dev->caps.dmfs_high_steer_mode ==
MLX4_STEERING_DMFS_A0_DISABLE) {
dev->caps.dmfs_high_rate_qpn_base =
dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW];
dev->caps.dmfs_high_rate_qpn_range =
MLX4_A0_STEERING_TABLE_SIZE;
}
mlx4_dbg(dev, "DMFS high rate steer mode is: %s\n",
dmfs_high_rate_steering_mode_str(
dev->caps.dmfs_high_steer_mode));
}
} else {
err = mlx4_init_slave(dev);
if (err) {
if (err != -EPROBE_DEFER)
mlx4_err(dev, "Failed to initialize slave\n");
return err;
}
err = mlx4_slave_cap(dev);
if (err) {
mlx4_err(dev, "Failed to obtain slave caps\n");
goto err_close;
}
}
if (map_bf_area(dev))
mlx4_dbg(dev, "Failed to map blue flame area\n");
/*Only the master set the ports, all the rest got it from it.*/
if (!mlx4_is_slave(dev))
mlx4_set_port_mask(dev);
err = mlx4_QUERY_ADAPTER(dev, &adapter);
if (err) {
mlx4_err(dev, "QUERY_ADAPTER command failed, aborting\n");
goto unmap_bf;
}
/* Query CONFIG_DEV parameters */
err = mlx4_config_dev_retrieval(dev, &params);
if (err && err != -ENOTSUPP) {
mlx4_err(dev, "Failed to query CONFIG_DEV parameters\n");
} else if (!err) {
dev->caps.rx_checksum_flags_port[1] = params.rx_csum_flags_port_1;
dev->caps.rx_checksum_flags_port[2] = params.rx_csum_flags_port_2;
}
priv->eq_table.inta_pin = adapter.inta_pin;
memcpy(dev->board_id, adapter.board_id, sizeof dev->board_id);
return 0;
unmap_bf:
unmap_internal_clock(dev);
unmap_bf_area(dev);
if (mlx4_is_slave(dev)) {
kfree(dev->caps.qp0_qkey);
kfree(dev->caps.qp0_tunnel);
kfree(dev->caps.qp0_proxy);
kfree(dev->caps.qp1_tunnel);
kfree(dev->caps.qp1_proxy);
}
err_close:
if (mlx4_is_slave(dev))
mlx4_slave_exit(dev);
else
mlx4_CLOSE_HCA(dev, 0);
err_free_icm:
if (!mlx4_is_slave(dev))
mlx4_free_icms(dev);
return err;
}
static int mlx4_init_counters_table(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int nent_pow2;
if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_COUNTERS))
return -ENOENT;
if (!dev->caps.max_counters)
return -ENOSPC;
nent_pow2 = roundup_pow_of_two(dev->caps.max_counters);
/* reserve last counter index for sink counter */
return mlx4_bitmap_init(&priv->counters_bitmap, nent_pow2,
nent_pow2 - 1, 0,
nent_pow2 - dev->caps.max_counters + 1);
}
static void mlx4_cleanup_counters_table(struct mlx4_dev *dev)
{
if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_COUNTERS))
return;
if (!dev->caps.max_counters)
return;
mlx4_bitmap_cleanup(&mlx4_priv(dev)->counters_bitmap);
}
static void mlx4_cleanup_default_counters(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int port;
for (port = 0; port < dev->caps.num_ports; port++)
if (priv->def_counter[port] != -1)
mlx4_counter_free(dev, priv->def_counter[port]);
}
static int mlx4_allocate_default_counters(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int port, err = 0;
u32 idx;
for (port = 0; port < dev->caps.num_ports; port++)
priv->def_counter[port] = -1;
for (port = 0; port < dev->caps.num_ports; port++) {
err = mlx4_counter_alloc(dev, &idx);
if (!err || err == -ENOSPC) {
priv->def_counter[port] = idx;
} else if (err == -ENOENT) {
err = 0;
continue;
} else if (mlx4_is_slave(dev) && err == -EINVAL) {
priv->def_counter[port] = MLX4_SINK_COUNTER_INDEX(dev);
mlx4_warn(dev, "can't allocate counter from old PF driver, using index %d\n",
MLX4_SINK_COUNTER_INDEX(dev));
err = 0;
} else {
mlx4_err(dev, "%s: failed to allocate default counter port %d err %d\n",
__func__, port + 1, err);
mlx4_cleanup_default_counters(dev);
return err;
}
mlx4_dbg(dev, "%s: default counter index %d for port %d\n",
__func__, priv->def_counter[port], port + 1);
}
return err;
}
int __mlx4_counter_alloc(struct mlx4_dev *dev, u32 *idx)
{
struct mlx4_priv *priv = mlx4_priv(dev);
if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_COUNTERS))
return -ENOENT;
*idx = mlx4_bitmap_alloc(&priv->counters_bitmap);
if (*idx == -1) {
*idx = MLX4_SINK_COUNTER_INDEX(dev);
return -ENOSPC;
}
return 0;
}
int mlx4_counter_alloc(struct mlx4_dev *dev, u32 *idx)
{
u64 out_param;
int err;
if (mlx4_is_mfunc(dev)) {
err = mlx4_cmd_imm(dev, 0, &out_param, RES_COUNTER,
RES_OP_RESERVE, MLX4_CMD_ALLOC_RES,
MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
if (!err)
*idx = get_param_l(&out_param);
return err;
}
return __mlx4_counter_alloc(dev, idx);
}
EXPORT_SYMBOL_GPL(mlx4_counter_alloc);
static int __mlx4_clear_if_stat(struct mlx4_dev *dev,
u8 counter_index)
{
struct mlx4_cmd_mailbox *if_stat_mailbox;
int err;
u32 if_stat_in_mod = (counter_index & 0xff) | MLX4_QUERY_IF_STAT_RESET;
if_stat_mailbox = mlx4_alloc_cmd_mailbox(dev);
if (IS_ERR(if_stat_mailbox))
return PTR_ERR(if_stat_mailbox);
err = mlx4_cmd_box(dev, 0, if_stat_mailbox->dma, if_stat_in_mod, 0,
MLX4_CMD_QUERY_IF_STAT, MLX4_CMD_TIME_CLASS_C,
MLX4_CMD_NATIVE);
mlx4_free_cmd_mailbox(dev, if_stat_mailbox);
return err;
}
void __mlx4_counter_free(struct mlx4_dev *dev, u32 idx)
{
if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_COUNTERS))
return;
if (idx == MLX4_SINK_COUNTER_INDEX(dev))
return;
__mlx4_clear_if_stat(dev, idx);
mlx4_bitmap_free(&mlx4_priv(dev)->counters_bitmap, idx, MLX4_USE_RR);
return;
}
void mlx4_counter_free(struct mlx4_dev *dev, u32 idx)
{
u64 in_param = 0;
if (mlx4_is_mfunc(dev)) {
set_param_l(&in_param, idx);
mlx4_cmd(dev, in_param, RES_COUNTER, RES_OP_RESERVE,
MLX4_CMD_FREE_RES, MLX4_CMD_TIME_CLASS_A,
MLX4_CMD_WRAPPED);
return;
}
__mlx4_counter_free(dev, idx);
}
EXPORT_SYMBOL_GPL(mlx4_counter_free);
int mlx4_get_default_counter_index(struct mlx4_dev *dev, int port)
{
struct mlx4_priv *priv = mlx4_priv(dev);
return priv->def_counter[port - 1];
}
EXPORT_SYMBOL_GPL(mlx4_get_default_counter_index);
void mlx4_set_admin_guid(struct mlx4_dev *dev, __be64 guid, int entry, int port)
{
struct mlx4_priv *priv = mlx4_priv(dev);
priv->mfunc.master.vf_admin[entry].vport[port].guid = guid;
}
EXPORT_SYMBOL_GPL(mlx4_set_admin_guid);
__be64 mlx4_get_admin_guid(struct mlx4_dev *dev, int entry, int port)
{
struct mlx4_priv *priv = mlx4_priv(dev);
return priv->mfunc.master.vf_admin[entry].vport[port].guid;
}
EXPORT_SYMBOL_GPL(mlx4_get_admin_guid);
void mlx4_set_random_admin_guid(struct mlx4_dev *dev, int entry, int port)
{
struct mlx4_priv *priv = mlx4_priv(dev);
__be64 guid;
/* hw GUID */
if (entry == 0)
return;
get_random_bytes((char *)&guid, sizeof(guid));
guid &= ~(cpu_to_be64(1ULL << 56));
guid |= cpu_to_be64(1ULL << 57);
priv->mfunc.master.vf_admin[entry].vport[port].guid = guid;
}
static int mlx4_setup_hca(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int err;
int port;
__be32 ib_port_default_caps;
err = mlx4_init_uar_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize user access region table, aborting\n");
return err;
}
err = mlx4_uar_alloc(dev, &priv->driver_uar);
if (err) {
mlx4_err(dev, "Failed to allocate driver access region, aborting\n");
goto err_uar_table_free;
}
priv->kar = ioremap((phys_addr_t) priv->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
if (!priv->kar) {
mlx4_err(dev, "Couldn't map kernel access region, aborting\n");
err = -ENOMEM;
goto err_uar_free;
}
err = mlx4_init_pd_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize protection domain table, aborting\n");
goto err_kar_unmap;
}
err = mlx4_init_xrcd_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize reliable connection domain table, aborting\n");
goto err_pd_table_free;
}
err = mlx4_init_mr_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize memory region table, aborting\n");
goto err_xrcd_table_free;
}
if (!mlx4_is_slave(dev)) {
err = mlx4_init_mcg_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize multicast group table, aborting\n");
goto err_mr_table_free;
}
err = mlx4_config_mad_demux(dev);
if (err) {
mlx4_err(dev, "Failed in config_mad_demux, aborting\n");
goto err_mcg_table_free;
}
}
err = mlx4_init_eq_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize event queue table, aborting\n");
goto err_mcg_table_free;
}
err = mlx4_cmd_use_events(dev);
if (err) {
mlx4_err(dev, "Failed to switch to event-driven firmware commands, aborting\n");
goto err_eq_table_free;
}
err = mlx4_NOP(dev);
if (err) {
if (dev->flags & MLX4_FLAG_MSI_X) {
mlx4_warn(dev, "NOP command failed to generate MSI-X interrupt IRQ %d)\n",
priv->eq_table.eq[MLX4_EQ_ASYNC].irq);
mlx4_warn(dev, "Trying again without MSI-X\n");
} else {
mlx4_err(dev, "NOP command failed to generate interrupt (IRQ %d), aborting\n",
priv->eq_table.eq[MLX4_EQ_ASYNC].irq);
mlx4_err(dev, "BIOS or ACPI interrupt routing problem?\n");
}
goto err_cmd_poll;
}
mlx4_dbg(dev, "NOP command IRQ test passed\n");
err = mlx4_init_cq_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize completion queue table, aborting\n");
goto err_cmd_poll;
}
err = mlx4_init_srq_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize shared receive queue table, aborting\n");
goto err_cq_table_free;
}
err = mlx4_init_qp_table(dev);
if (err) {
mlx4_err(dev, "Failed to initialize queue pair table, aborting\n");
goto err_srq_table_free;
}
if (!mlx4_is_slave(dev)) {
err = mlx4_init_counters_table(dev);
if (err && err != -ENOENT) {
mlx4_err(dev, "Failed to initialize counters table, aborting\n");
goto err_qp_table_free;
}
}
err = mlx4_allocate_default_counters(dev);
if (err) {
mlx4_err(dev, "Failed to allocate default counters, aborting\n");
goto err_counters_table_free;
}
if (!mlx4_is_slave(dev)) {
for (port = 1; port <= dev->caps.num_ports; port++) {
ib_port_default_caps = 0;
err = mlx4_get_port_ib_caps(dev, port,
&ib_port_default_caps);
if (err)
mlx4_warn(dev, "failed to get port %d default ib capabilities (%d). Continuing with caps = 0\n",
port, err);
dev->caps.ib_port_def_cap[port] = ib_port_default_caps;
/* initialize per-slave default ib port capabilities */
if (mlx4_is_master(dev)) {
int i;
for (i = 0; i < dev->num_slaves; i++) {
if (i == mlx4_master_func_num(dev))
continue;
priv->mfunc.master.slave_state[i].ib_cap_mask[port] =
ib_port_default_caps;
}
}
if (mlx4_is_mfunc(dev))
dev->caps.port_ib_mtu[port] = IB_MTU_2048;
else
dev->caps.port_ib_mtu[port] = IB_MTU_4096;
err = mlx4_SET_PORT(dev, port, mlx4_is_master(dev) ?
dev->caps.pkey_table_len[port] : -1);
if (err) {
mlx4_err(dev, "Failed to set port %d, aborting\n",
port);
goto err_default_countes_free;
}
}
}
return 0;
err_default_countes_free:
mlx4_cleanup_default_counters(dev);
err_counters_table_free:
if (!mlx4_is_slave(dev))
mlx4_cleanup_counters_table(dev);
err_qp_table_free:
mlx4_cleanup_qp_table(dev);
err_srq_table_free:
mlx4_cleanup_srq_table(dev);
err_cq_table_free:
mlx4_cleanup_cq_table(dev);
err_cmd_poll:
mlx4_cmd_use_polling(dev);
err_eq_table_free:
mlx4_cleanup_eq_table(dev);
err_mcg_table_free:
if (!mlx4_is_slave(dev))
mlx4_cleanup_mcg_table(dev);
err_mr_table_free:
mlx4_cleanup_mr_table(dev);
err_xrcd_table_free:
mlx4_cleanup_xrcd_table(dev);
err_pd_table_free:
mlx4_cleanup_pd_table(dev);
err_kar_unmap:
iounmap(priv->kar);
err_uar_free:
mlx4_uar_free(dev, &priv->driver_uar);
err_uar_table_free:
mlx4_cleanup_uar_table(dev);
return err;
}
static int mlx4_init_affinity_hint(struct mlx4_dev *dev, int port, int eqn)
{
int requested_cpu = 0;
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_eq *eq;
int off = 0;
int i;
if (eqn > dev->caps.num_comp_vectors)
return -EINVAL;
for (i = 1; i < port; i++)
off += mlx4_get_eqs_per_port(dev, i);
requested_cpu = eqn - off - !!(eqn > MLX4_EQ_ASYNC);
/* Meaning EQs are shared, and this call comes from the second port */
if (requested_cpu < 0)
return 0;
eq = &priv->eq_table.eq[eqn];
if (!zalloc_cpumask_var(&eq->affinity_mask, GFP_KERNEL))
return -ENOMEM;
cpumask_set_cpu(requested_cpu, eq->affinity_mask);
return 0;
}
static void mlx4_enable_msi_x(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct msix_entry *entries;
int i;
int port = 0;
if (msi_x) {
int nreq = dev->caps.num_ports * num_online_cpus() + 1;
nreq = min_t(int, dev->caps.num_eqs - dev->caps.reserved_eqs,
nreq);
if (nreq > MAX_MSIX)
nreq = MAX_MSIX;
entries = kcalloc(nreq, sizeof *entries, GFP_KERNEL);
if (!entries)
goto no_msi;
for (i = 0; i < nreq; ++i)
entries[i].entry = i;
nreq = pci_enable_msix_range(dev->persist->pdev, entries, 2,
nreq);
if (nreq < 0 || nreq < MLX4_EQ_ASYNC) {
kfree(entries);
goto no_msi;
}
/* 1 is reserved for events (asyncrounous EQ) */
dev->caps.num_comp_vectors = nreq - 1;
priv->eq_table.eq[MLX4_EQ_ASYNC].irq = entries[0].vector;
bitmap_zero(priv->eq_table.eq[MLX4_EQ_ASYNC].actv_ports.ports,
dev->caps.num_ports);
for (i = 0; i < dev->caps.num_comp_vectors + 1; i++) {
if (i == MLX4_EQ_ASYNC)
continue;
priv->eq_table.eq[i].irq =
entries[i + 1 - !!(i > MLX4_EQ_ASYNC)].vector;
if (MLX4_IS_LEGACY_EQ_MODE(dev->caps)) {
bitmap_fill(priv->eq_table.eq[i].actv_ports.ports,
dev->caps.num_ports);
/* We don't set affinity hint when there
* aren't enough EQs
*/
} else {
set_bit(port,
priv->eq_table.eq[i].actv_ports.ports);
if (mlx4_init_affinity_hint(dev, port + 1, i))
mlx4_warn(dev, "Couldn't init hint cpumask for EQ %d\n",
i);
}
/* We divide the Eqs evenly between the two ports.
* (dev->caps.num_comp_vectors / dev->caps.num_ports)
* refers to the number of Eqs per port
* (i.e eqs_per_port). Theoretically, we would like to
* write something like (i + 1) % eqs_per_port == 0.
* However, since there's an asynchronous Eq, we have
* to skip over it by comparing this condition to
* !!((i + 1) > MLX4_EQ_ASYNC).
*/
if ((dev->caps.num_comp_vectors > dev->caps.num_ports) &&
((i + 1) %
(dev->caps.num_comp_vectors / dev->caps.num_ports)) ==
!!((i + 1) > MLX4_EQ_ASYNC))
/* If dev->caps.num_comp_vectors < dev->caps.num_ports,
* everything is shared anyway.
*/
port++;
}
dev->flags |= MLX4_FLAG_MSI_X;
kfree(entries);
return;
}
no_msi:
dev->caps.num_comp_vectors = 1;
BUG_ON(MLX4_EQ_ASYNC >= 2);
for (i = 0; i < 2; ++i) {
priv->eq_table.eq[i].irq = dev->persist->pdev->irq;
if (i != MLX4_EQ_ASYNC) {
bitmap_fill(priv->eq_table.eq[i].actv_ports.ports,
dev->caps.num_ports);
}
}
}
static int mlx4_init_port_info(struct mlx4_dev *dev, int port)
{
struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
int err = 0;
info->dev = dev;
info->port = port;
if (!mlx4_is_slave(dev)) {
mlx4_init_mac_table(dev, &info->mac_table);
mlx4_init_vlan_table(dev, &info->vlan_table);
mlx4_init_roce_gid_table(dev, &info->gid_table);
info->base_qpn = mlx4_get_base_qpn(dev, port);
}
sprintf(info->dev_name, "mlx4_port%d", port);
info->port_attr.attr.name = info->dev_name;
if (mlx4_is_mfunc(dev))
info->port_attr.attr.mode = S_IRUGO;
else {
info->port_attr.attr.mode = S_IRUGO | S_IWUSR;
info->port_attr.store = set_port_type;
}
info->port_attr.show = show_port_type;
sysfs_attr_init(&info->port_attr.attr);
err = device_create_file(&dev->persist->pdev->dev, &info->port_attr);
if (err) {
mlx4_err(dev, "Failed to create file for port %d\n", port);
info->port = -1;
}
sprintf(info->dev_mtu_name, "mlx4_port%d_mtu", port);
info->port_mtu_attr.attr.name = info->dev_mtu_name;
if (mlx4_is_mfunc(dev))
info->port_mtu_attr.attr.mode = S_IRUGO;
else {
info->port_mtu_attr.attr.mode = S_IRUGO | S_IWUSR;
info->port_mtu_attr.store = set_port_ib_mtu;
}
info->port_mtu_attr.show = show_port_ib_mtu;
sysfs_attr_init(&info->port_mtu_attr.attr);
err = device_create_file(&dev->persist->pdev->dev,
&info->port_mtu_attr);
if (err) {
mlx4_err(dev, "Failed to create mtu file for port %d\n", port);
device_remove_file(&info->dev->persist->pdev->dev,
&info->port_attr);
info->port = -1;
}
return err;
}
static void mlx4_cleanup_port_info(struct mlx4_port_info *info)
{
if (info->port < 0)
return;
device_remove_file(&info->dev->persist->pdev->dev, &info->port_attr);
device_remove_file(&info->dev->persist->pdev->dev,
&info->port_mtu_attr);
#ifdef CONFIG_RFS_ACCEL
free_irq_cpu_rmap(info->rmap);
info->rmap = NULL;
#endif
}
static int mlx4_init_steering(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int num_entries = dev->caps.num_ports;
int i, j;
priv->steer = kzalloc(sizeof(struct mlx4_steer) * num_entries, GFP_KERNEL);
if (!priv->steer)
return -ENOMEM;
for (i = 0; i < num_entries; i++)
for (j = 0; j < MLX4_NUM_STEERS; j++) {
INIT_LIST_HEAD(&priv->steer[i].promisc_qps[j]);
INIT_LIST_HEAD(&priv->steer[i].steer_entries[j]);
}
return 0;
}
static void mlx4_clear_steering(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_steer_index *entry, *tmp_entry;
struct mlx4_promisc_qp *pqp, *tmp_pqp;
int num_entries = dev->caps.num_ports;
int i, j;
for (i = 0; i < num_entries; i++) {
for (j = 0; j < MLX4_NUM_STEERS; j++) {
list_for_each_entry_safe(pqp, tmp_pqp,
&priv->steer[i].promisc_qps[j],
list) {
list_del(&pqp->list);
kfree(pqp);
}
list_for_each_entry_safe(entry, tmp_entry,
&priv->steer[i].steer_entries[j],
list) {
list_del(&entry->list);
list_for_each_entry_safe(pqp, tmp_pqp,
&entry->duplicates,
list) {
list_del(&pqp->list);
kfree(pqp);
}
kfree(entry);
}
}
}
kfree(priv->steer);
}
static int extended_func_num(struct pci_dev *pdev)
{
return PCI_SLOT(pdev->devfn) * 8 + PCI_FUNC(pdev->devfn);
}
#define MLX4_OWNER_BASE 0x8069c
#define MLX4_OWNER_SIZE 4
static int mlx4_get_ownership(struct mlx4_dev *dev)
{
void __iomem *owner;
u32 ret;
if (pci_channel_offline(dev->persist->pdev))
return -EIO;
owner = ioremap(pci_resource_start(dev->persist->pdev, 0) +
MLX4_OWNER_BASE,
MLX4_OWNER_SIZE);
if (!owner) {
mlx4_err(dev, "Failed to obtain ownership bit\n");
return -ENOMEM;
}
ret = readl(owner);
iounmap(owner);
return (int) !!ret;
}
static void mlx4_free_ownership(struct mlx4_dev *dev)
{
void __iomem *owner;
if (pci_channel_offline(dev->persist->pdev))
return;
owner = ioremap(pci_resource_start(dev->persist->pdev, 0) +
MLX4_OWNER_BASE,
MLX4_OWNER_SIZE);
if (!owner) {
mlx4_err(dev, "Failed to obtain ownership bit\n");
return;
}
writel(0, owner);
msleep(1000);
iounmap(owner);
}
#define SRIOV_VALID_STATE(flags) (!!((flags) & MLX4_FLAG_SRIOV) ==\
!!((flags) & MLX4_FLAG_MASTER))
static u64 mlx4_enable_sriov(struct mlx4_dev *dev, struct pci_dev *pdev,
u8 total_vfs, int existing_vfs, int reset_flow)
{
u64 dev_flags = dev->flags;
int err = 0;
int fw_enabled_sriov_vfs = min(pci_sriov_get_totalvfs(pdev),
MLX4_MAX_NUM_VF);
if (reset_flow) {
dev->dev_vfs = kcalloc(total_vfs, sizeof(*dev->dev_vfs),
GFP_KERNEL);
if (!dev->dev_vfs)
goto free_mem;
return dev_flags;
}
atomic_inc(&pf_loading);
if (dev->flags & MLX4_FLAG_SRIOV) {
if (existing_vfs != total_vfs) {
mlx4_err(dev, "SR-IOV was already enabled, but with num_vfs (%d) different than requested (%d)\n",
existing_vfs, total_vfs);
total_vfs = existing_vfs;
}
}
dev->dev_vfs = kzalloc(total_vfs * sizeof(*dev->dev_vfs), GFP_KERNEL);
if (NULL == dev->dev_vfs) {
mlx4_err(dev, "Failed to allocate memory for VFs\n");
goto disable_sriov;
}
if (!(dev->flags & MLX4_FLAG_SRIOV)) {
if (total_vfs > fw_enabled_sriov_vfs) {
mlx4_err(dev, "requested vfs (%d) > available vfs (%d). Continuing without SR_IOV\n",
total_vfs, fw_enabled_sriov_vfs);
err = -ENOMEM;
goto disable_sriov;
}
mlx4_warn(dev, "Enabling SR-IOV with %d VFs\n", total_vfs);
err = pci_enable_sriov(pdev, total_vfs);
}
if (err) {
mlx4_err(dev, "Failed to enable SR-IOV, continuing without SR-IOV (err = %d)\n",
err);
goto disable_sriov;
} else {
mlx4_warn(dev, "Running in master mode\n");
dev_flags |= MLX4_FLAG_SRIOV |
MLX4_FLAG_MASTER;
dev_flags &= ~MLX4_FLAG_SLAVE;
dev->persist->num_vfs = total_vfs;
}
return dev_flags;
disable_sriov:
atomic_dec(&pf_loading);
free_mem:
dev->persist->num_vfs = 0;
kfree(dev->dev_vfs);
dev->dev_vfs = NULL;
return dev_flags & ~MLX4_FLAG_MASTER;
}
enum {
MLX4_DEV_CAP_CHECK_NUM_VFS_ABOVE_64 = -1,
};
static int mlx4_check_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap,
int *nvfs)
{
int requested_vfs = nvfs[0] + nvfs[1] + nvfs[2];
/* Checking for 64 VFs as a limitation of CX2 */
if (!(dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_80_VFS) &&
requested_vfs >= 64) {
mlx4_err(dev, "Requested %d VFs, but FW does not support more than 64\n",
requested_vfs);
return MLX4_DEV_CAP_CHECK_NUM_VFS_ABOVE_64;
}
return 0;
}
static int mlx4_load_one(struct pci_dev *pdev, int pci_dev_data,
int total_vfs, int *nvfs, struct mlx4_priv *priv,
int reset_flow)
{
struct mlx4_dev *dev;
unsigned sum = 0;
int err;
int port;
int i;
struct mlx4_dev_cap *dev_cap = NULL;
int existing_vfs = 0;
dev = &priv->dev;
INIT_LIST_HEAD(&priv->ctx_list);
spin_lock_init(&priv->ctx_lock);
mutex_init(&priv->port_mutex);
mutex_init(&priv->bond_mutex);
INIT_LIST_HEAD(&priv->pgdir_list);
mutex_init(&priv->pgdir_mutex);
INIT_LIST_HEAD(&priv->bf_list);
mutex_init(&priv->bf_mutex);
dev->rev_id = pdev->revision;
dev->numa_node = dev_to_node(&pdev->dev);
/* Detect if this device is a virtual function */
if (pci_dev_data & MLX4_PCI_DEV_IS_VF) {
mlx4_warn(dev, "Detected virtual function - running in slave mode\n");
dev->flags |= MLX4_FLAG_SLAVE;
} else {
/* We reset the device and enable SRIOV only for physical
* devices. Try to claim ownership on the device;
* if already taken, skip -- do not allow multiple PFs */
err = mlx4_get_ownership(dev);
if (err) {
if (err < 0)
return err;
else {
mlx4_warn(dev, "Multiple PFs not yet supported - Skipping PF\n");
return -EINVAL;
}
}
atomic_set(&priv->opreq_count, 0);
INIT_WORK(&priv->opreq_task, mlx4_opreq_action);
/*
* Now reset the HCA before we touch the PCI capabilities or
* attempt a firmware command, since a boot ROM may have left
* the HCA in an undefined state.
*/
err = mlx4_reset(dev);
if (err) {
mlx4_err(dev, "Failed to reset HCA, aborting\n");
goto err_sriov;
}
if (total_vfs) {
dev->flags = MLX4_FLAG_MASTER;
existing_vfs = pci_num_vf(pdev);
if (existing_vfs)
dev->flags |= MLX4_FLAG_SRIOV;
dev->persist->num_vfs = total_vfs;
}
}
/* on load remove any previous indication of internal error,
* device is up.
*/
dev->persist->state = MLX4_DEVICE_STATE_UP;
slave_start:
err = mlx4_cmd_init(dev);
if (err) {
mlx4_err(dev, "Failed to init command interface, aborting\n");
goto err_sriov;
}
/* In slave functions, the communication channel must be initialized
* before posting commands. Also, init num_slaves before calling
* mlx4_init_hca */
if (mlx4_is_mfunc(dev)) {
if (mlx4_is_master(dev)) {
dev->num_slaves = MLX4_MAX_NUM_SLAVES;
} else {
dev->num_slaves = 0;
err = mlx4_multi_func_init(dev);
if (err) {
mlx4_err(dev, "Failed to init slave mfunc interface, aborting\n");
goto err_cmd;
}
}
}
err = mlx4_init_fw(dev);
if (err) {
mlx4_err(dev, "Failed to init fw, aborting.\n");
goto err_mfunc;
}
if (mlx4_is_master(dev)) {
/* when we hit the goto slave_start below, dev_cap already initialized */
if (!dev_cap) {
dev_cap = kzalloc(sizeof(*dev_cap), GFP_KERNEL);
if (!dev_cap) {
err = -ENOMEM;
goto err_fw;
}
err = mlx4_QUERY_DEV_CAP(dev, dev_cap);
if (err) {
mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting.\n");
goto err_fw;
}
if (mlx4_check_dev_cap(dev, dev_cap, nvfs))
goto err_fw;
if (!(dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_SYS_EQS)) {
u64 dev_flags = mlx4_enable_sriov(dev, pdev,
total_vfs,
existing_vfs,
reset_flow);
mlx4_close_fw(dev);
mlx4_cmd_cleanup(dev, MLX4_CMD_CLEANUP_ALL);
dev->flags = dev_flags;
if (!SRIOV_VALID_STATE(dev->flags)) {
mlx4_err(dev, "Invalid SRIOV state\n");
goto err_sriov;
}
err = mlx4_reset(dev);
if (err) {
mlx4_err(dev, "Failed to reset HCA, aborting.\n");
goto err_sriov;
}
goto slave_start;
}
} else {
/* Legacy mode FW requires SRIOV to be enabled before
* doing QUERY_DEV_CAP, since max_eq's value is different if
* SRIOV is enabled.
*/
memset(dev_cap, 0, sizeof(*dev_cap));
err = mlx4_QUERY_DEV_CAP(dev, dev_cap);
if (err) {
mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting.\n");
goto err_fw;
}
if (mlx4_check_dev_cap(dev, dev_cap, nvfs))
goto err_fw;
}
}
err = mlx4_init_hca(dev);
if (err) {
if (err == -EACCES) {
/* Not primary Physical function
* Running in slave mode */
mlx4_cmd_cleanup(dev, MLX4_CMD_CLEANUP_ALL);
/* We're not a PF */
if (dev->flags & MLX4_FLAG_SRIOV) {
if (!existing_vfs)
pci_disable_sriov(pdev);
if (mlx4_is_master(dev) && !reset_flow)
atomic_dec(&pf_loading);
dev->flags &= ~MLX4_FLAG_SRIOV;
}
if (!mlx4_is_slave(dev))
mlx4_free_ownership(dev);
dev->flags |= MLX4_FLAG_SLAVE;
dev->flags &= ~MLX4_FLAG_MASTER;
goto slave_start;
} else
goto err_fw;
}
if (mlx4_is_master(dev) && (dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_SYS_EQS)) {
u64 dev_flags = mlx4_enable_sriov(dev, pdev, total_vfs,
existing_vfs, reset_flow);
if ((dev->flags ^ dev_flags) & (MLX4_FLAG_MASTER | MLX4_FLAG_SLAVE)) {
mlx4_cmd_cleanup(dev, MLX4_CMD_CLEANUP_VHCR);
dev->flags = dev_flags;
err = mlx4_cmd_init(dev);
if (err) {
/* Only VHCR is cleaned up, so could still
* send FW commands
*/
mlx4_err(dev, "Failed to init VHCR command interface, aborting\n");
goto err_close;
}
} else {
dev->flags = dev_flags;
}
if (!SRIOV_VALID_STATE(dev->flags)) {
mlx4_err(dev, "Invalid SRIOV state\n");
goto err_close;
}
}
/* check if the device is functioning at its maximum possible speed.
* No return code for this call, just warn the user in case of PCI
* express device capabilities are under-satisfied by the bus.
*/
if (!mlx4_is_slave(dev))
mlx4_check_pcie_caps(dev);
/* In master functions, the communication channel must be initialized
* after obtaining its address from fw */
if (mlx4_is_master(dev)) {
if (dev->caps.num_ports < 2 &&
num_vfs_argc > 1) {
err = -EINVAL;
mlx4_err(dev,
"Error: Trying to configure VFs on port 2, but HCA has only %d physical ports\n",
dev->caps.num_ports);
goto err_close;
}
memcpy(dev->persist->nvfs, nvfs, sizeof(dev->persist->nvfs));
for (i = 0;
i < sizeof(dev->persist->nvfs)/
sizeof(dev->persist->nvfs[0]); i++) {
unsigned j;
for (j = 0; j < dev->persist->nvfs[i]; ++sum, ++j) {
dev->dev_vfs[sum].min_port = i < 2 ? i + 1 : 1;
dev->dev_vfs[sum].n_ports = i < 2 ? 1 :
dev->caps.num_ports;
}
}
/* In master functions, the communication channel
* must be initialized after obtaining its address from fw
*/
err = mlx4_multi_func_init(dev);
if (err) {
mlx4_err(dev, "Failed to init master mfunc interface, aborting.\n");
goto err_close;
}
}
err = mlx4_alloc_eq_table(dev);
if (err)
goto err_master_mfunc;
bitmap_zero(priv->msix_ctl.pool_bm, MAX_MSIX);
mutex_init(&priv->msix_ctl.pool_lock);
mlx4_enable_msi_x(dev);
if ((mlx4_is_mfunc(dev)) &&
!(dev->flags & MLX4_FLAG_MSI_X)) {
err = -ENOSYS;
mlx4_err(dev, "INTx is not supported in multi-function mode, aborting\n");
goto err_free_eq;
}
if (!mlx4_is_slave(dev)) {
err = mlx4_init_steering(dev);
if (err)
goto err_disable_msix;
}
err = mlx4_setup_hca(dev);
if (err == -EBUSY && (dev->flags & MLX4_FLAG_MSI_X) &&
!mlx4_is_mfunc(dev)) {
dev->flags &= ~MLX4_FLAG_MSI_X;
dev->caps.num_comp_vectors = 1;
pci_disable_msix(pdev);
err = mlx4_setup_hca(dev);
}
if (err)
goto err_steer;
mlx4_init_quotas(dev);
/* When PF resources are ready arm its comm channel to enable
* getting commands
*/
if (mlx4_is_master(dev)) {
err = mlx4_ARM_COMM_CHANNEL(dev);
if (err) {
mlx4_err(dev, " Failed to arm comm channel eq: %x\n",
err);
goto err_steer;
}
}
for (port = 1; port <= dev->caps.num_ports; port++) {
err = mlx4_init_port_info(dev, port);
if (err)
goto err_port;
}
priv->v2p.port1 = 1;
priv->v2p.port2 = 2;
err = mlx4_register_device(dev);
if (err)
goto err_port;
mlx4_request_modules(dev);
mlx4_sense_init(dev);
mlx4_start_sense(dev);
priv->removed = 0;
if (mlx4_is_master(dev) && dev->persist->num_vfs && !reset_flow)
atomic_dec(&pf_loading);
kfree(dev_cap);
return 0;
err_port:
for (--port; port >= 1; --port)
mlx4_cleanup_port_info(&priv->port[port]);
mlx4_cleanup_default_counters(dev);
if (!mlx4_is_slave(dev))
mlx4_cleanup_counters_table(dev);
mlx4_cleanup_qp_table(dev);
mlx4_cleanup_srq_table(dev);
mlx4_cleanup_cq_table(dev);
mlx4_cmd_use_polling(dev);
mlx4_cleanup_eq_table(dev);
mlx4_cleanup_mcg_table(dev);
mlx4_cleanup_mr_table(dev);
mlx4_cleanup_xrcd_table(dev);
mlx4_cleanup_pd_table(dev);
mlx4_cleanup_uar_table(dev);
err_steer:
if (!mlx4_is_slave(dev))
mlx4_clear_steering(dev);
err_disable_msix:
if (dev->flags & MLX4_FLAG_MSI_X)
pci_disable_msix(pdev);
err_free_eq:
mlx4_free_eq_table(dev);
err_master_mfunc:
if (mlx4_is_master(dev)) {
mlx4_free_resource_tracker(dev, RES_TR_FREE_STRUCTS_ONLY);
mlx4_multi_func_cleanup(dev);
}
if (mlx4_is_slave(dev)) {
kfree(dev->caps.qp0_qkey);
kfree(dev->caps.qp0_tunnel);
kfree(dev->caps.qp0_proxy);
kfree(dev->caps.qp1_tunnel);
kfree(dev->caps.qp1_proxy);
}
err_close:
mlx4_close_hca(dev);
err_fw:
mlx4_close_fw(dev);
err_mfunc:
if (mlx4_is_slave(dev))
mlx4_multi_func_cleanup(dev);
err_cmd:
mlx4_cmd_cleanup(dev, MLX4_CMD_CLEANUP_ALL);
err_sriov:
if (dev->flags & MLX4_FLAG_SRIOV && !existing_vfs) {
pci_disable_sriov(pdev);
dev->flags &= ~MLX4_FLAG_SRIOV;
}
if (mlx4_is_master(dev) && dev->persist->num_vfs && !reset_flow)
atomic_dec(&pf_loading);
kfree(priv->dev.dev_vfs);
if (!mlx4_is_slave(dev))
mlx4_free_ownership(dev);
kfree(dev_cap);
return err;
}
static int __mlx4_init_one(struct pci_dev *pdev, int pci_dev_data,
struct mlx4_priv *priv)
{
int err;
int nvfs[MLX4_MAX_PORTS + 1] = {0, 0, 0};
int prb_vf[MLX4_MAX_PORTS + 1] = {0, 0, 0};
const int param_map[MLX4_MAX_PORTS + 1][MLX4_MAX_PORTS + 1] = {
{2, 0, 0}, {0, 1, 2}, {0, 1, 2} };
unsigned total_vfs = 0;
unsigned int i;
pr_info(DRV_NAME ": Initializing %s\n", pci_name(pdev));
err = pci_enable_device(pdev);
if (err) {
dev_err(&pdev->dev, "Cannot enable PCI device, aborting\n");
return err;
}
/* Due to requirement that all VFs and the PF are *guaranteed* 2 MACS
* per port, we must limit the number of VFs to 63 (since their are
* 128 MACs)
*/
for (i = 0; i < sizeof(nvfs)/sizeof(nvfs[0]) && i < num_vfs_argc;
total_vfs += nvfs[param_map[num_vfs_argc - 1][i]], i++) {
nvfs[param_map[num_vfs_argc - 1][i]] = num_vfs[i];
if (nvfs[i] < 0) {
dev_err(&pdev->dev, "num_vfs module parameter cannot be negative\n");
err = -EINVAL;
goto err_disable_pdev;
}
}
for (i = 0; i < sizeof(prb_vf)/sizeof(prb_vf[0]) && i < probe_vfs_argc;
i++) {
prb_vf[param_map[probe_vfs_argc - 1][i]] = probe_vf[i];
if (prb_vf[i] < 0 || prb_vf[i] > nvfs[i]) {
dev_err(&pdev->dev, "probe_vf module parameter cannot be negative or greater than num_vfs\n");
err = -EINVAL;
goto err_disable_pdev;
}
}
if (total_vfs > MLX4_MAX_NUM_VF) {
dev_err(&pdev->dev,
"Requested more VF's (%d) than allowed by hw (%d)\n",
total_vfs, MLX4_MAX_NUM_VF);
err = -EINVAL;
goto err_disable_pdev;
}
for (i = 0; i < MLX4_MAX_PORTS; i++) {
if (nvfs[i] + nvfs[2] > MLX4_MAX_NUM_VF_P_PORT) {
dev_err(&pdev->dev,
"Requested more VF's (%d) for port (%d) than allowed by driver (%d)\n",
nvfs[i] + nvfs[2], i + 1,
MLX4_MAX_NUM_VF_P_PORT);
err = -EINVAL;
goto err_disable_pdev;
}
}
/* Check for BARs. */
if (!(pci_dev_data & MLX4_PCI_DEV_IS_VF) &&
!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
dev_err(&pdev->dev, "Missing DCS, aborting (driver_data: 0x%x, pci_resource_flags(pdev, 0):0x%lx)\n",
pci_dev_data, pci_resource_flags(pdev, 0));
err = -ENODEV;
goto err_disable_pdev;
}
if (!(pci_resource_flags(pdev, 2) & IORESOURCE_MEM)) {
dev_err(&pdev->dev, "Missing UAR, aborting\n");
err = -ENODEV;
goto err_disable_pdev;
}
err = pci_request_regions(pdev, DRV_NAME);
if (err) {
dev_err(&pdev->dev, "Couldn't get PCI resources, aborting\n");
goto err_disable_pdev;
}
pci_set_master(pdev);
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
if (err) {
dev_warn(&pdev->dev, "Warning: couldn't set 64-bit PCI DMA mask\n");
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting\n");
goto err_release_regions;
}
}
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
if (err) {
dev_warn(&pdev->dev, "Warning: couldn't set 64-bit consistent PCI DMA mask\n");
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev, "Can't set consistent PCI DMA mask, aborting\n");
goto err_release_regions;
}
}
/* Allow large DMA segments, up to the firmware limit of 1 GB */
dma_set_max_seg_size(&pdev->dev, 1024 * 1024 * 1024);
/* Detect if this device is a virtual function */
if (pci_dev_data & MLX4_PCI_DEV_IS_VF) {
/* When acting as pf, we normally skip vfs unless explicitly
* requested to probe them.
*/
if (total_vfs) {
unsigned vfs_offset = 0;
for (i = 0; i < sizeof(nvfs)/sizeof(nvfs[0]) &&
vfs_offset + nvfs[i] < extended_func_num(pdev);
vfs_offset += nvfs[i], i++)
;
if (i == sizeof(nvfs)/sizeof(nvfs[0])) {
err = -ENODEV;
goto err_release_regions;
}
if ((extended_func_num(pdev) - vfs_offset)
> prb_vf[i]) {
dev_warn(&pdev->dev, "Skipping virtual function:%d\n",
extended_func_num(pdev));
err = -ENODEV;
goto err_release_regions;
}
}
}
err = mlx4_catas_init(&priv->dev);
if (err)
goto err_release_regions;
err = mlx4_load_one(pdev, pci_dev_data, total_vfs, nvfs, priv, 0);
if (err)
goto err_catas;
return 0;
err_catas:
mlx4_catas_end(&priv->dev);
err_release_regions:
pci_release_regions(pdev);
err_disable_pdev:
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
return err;
}
static int mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct mlx4_priv *priv;
struct mlx4_dev *dev;
int ret;
printk_once(KERN_INFO "%s", mlx4_version);
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
dev = &priv->dev;
dev->persist = kzalloc(sizeof(*dev->persist), GFP_KERNEL);
if (!dev->persist) {
kfree(priv);
return -ENOMEM;
}
dev->persist->pdev = pdev;
dev->persist->dev = dev;
pci_set_drvdata(pdev, dev->persist);
priv->pci_dev_data = id->driver_data;
mutex_init(&dev->persist->device_state_mutex);
mutex_init(&dev->persist->interface_state_mutex);
ret = __mlx4_init_one(pdev, id->driver_data, priv);
if (ret) {
kfree(dev->persist);
kfree(priv);
} else {
pci_save_state(pdev);
}
return ret;
}
static void mlx4_clean_dev(struct mlx4_dev *dev)
{
struct mlx4_dev_persistent *persist = dev->persist;
struct mlx4_priv *priv = mlx4_priv(dev);
unsigned long flags = (dev->flags & RESET_PERSIST_MASK_FLAGS);
memset(priv, 0, sizeof(*priv));
priv->dev.persist = persist;
priv->dev.flags = flags;
}
static void mlx4_unload_one(struct pci_dev *pdev)
{
struct mlx4_dev_persistent *persist = pci_get_drvdata(pdev);
struct mlx4_dev *dev = persist->dev;
struct mlx4_priv *priv = mlx4_priv(dev);
int pci_dev_data;
int p, i;
if (priv->removed)
return;
/* saving current ports type for further use */
for (i = 0; i < dev->caps.num_ports; i++) {
dev->persist->curr_port_type[i] = dev->caps.port_type[i + 1];
dev->persist->curr_port_poss_type[i] = dev->caps.
possible_type[i + 1];
}
pci_dev_data = priv->pci_dev_data;
mlx4_stop_sense(dev);
mlx4_unregister_device(dev);
for (p = 1; p <= dev->caps.num_ports; p++) {
mlx4_cleanup_port_info(&priv->port[p]);
mlx4_CLOSE_PORT(dev, p);
}
if (mlx4_is_master(dev))
mlx4_free_resource_tracker(dev,
RES_TR_FREE_SLAVES_ONLY);
mlx4_cleanup_default_counters(dev);
if (!mlx4_is_slave(dev))
mlx4_cleanup_counters_table(dev);
mlx4_cleanup_qp_table(dev);
mlx4_cleanup_srq_table(dev);
mlx4_cleanup_cq_table(dev);
mlx4_cmd_use_polling(dev);
mlx4_cleanup_eq_table(dev);
mlx4_cleanup_mcg_table(dev);
mlx4_cleanup_mr_table(dev);
mlx4_cleanup_xrcd_table(dev);
mlx4_cleanup_pd_table(dev);
if (mlx4_is_master(dev))
mlx4_free_resource_tracker(dev,
RES_TR_FREE_STRUCTS_ONLY);
iounmap(priv->kar);
mlx4_uar_free(dev, &priv->driver_uar);
mlx4_cleanup_uar_table(dev);
if (!mlx4_is_slave(dev))
mlx4_clear_steering(dev);
mlx4_free_eq_table(dev);
if (mlx4_is_master(dev))
mlx4_multi_func_cleanup(dev);
mlx4_close_hca(dev);
mlx4_close_fw(dev);
if (mlx4_is_slave(dev))
mlx4_multi_func_cleanup(dev);
mlx4_cmd_cleanup(dev, MLX4_CMD_CLEANUP_ALL);
if (dev->flags & MLX4_FLAG_MSI_X)
pci_disable_msix(pdev);
if (!mlx4_is_slave(dev))
mlx4_free_ownership(dev);
kfree(dev->caps.qp0_qkey);
kfree(dev->caps.qp0_tunnel);
kfree(dev->caps.qp0_proxy);
kfree(dev->caps.qp1_tunnel);
kfree(dev->caps.qp1_proxy);
kfree(dev->dev_vfs);
mlx4_clean_dev(dev);
priv->pci_dev_data = pci_dev_data;
priv->removed = 1;
}
static void mlx4_remove_one(struct pci_dev *pdev)
{
struct mlx4_dev_persistent *persist = pci_get_drvdata(pdev);
struct mlx4_dev *dev = persist->dev;
struct mlx4_priv *priv = mlx4_priv(dev);
int active_vfs = 0;
mutex_lock(&persist->interface_state_mutex);
persist->interface_state |= MLX4_INTERFACE_STATE_DELETION;
mutex_unlock(&persist->interface_state_mutex);
/* Disabling SR-IOV is not allowed while there are active vf's */
if (mlx4_is_master(dev) && dev->flags & MLX4_FLAG_SRIOV) {
active_vfs = mlx4_how_many_lives_vf(dev);
if (active_vfs) {
pr_warn("Removing PF when there are active VF's !!\n");
pr_warn("Will not disable SR-IOV.\n");
}
}
/* device marked to be under deletion running now without the lock
* letting other tasks to be terminated
*/
if (persist->interface_state & MLX4_INTERFACE_STATE_UP)
mlx4_unload_one(pdev);
else
mlx4_info(dev, "%s: interface is down\n", __func__);
mlx4_catas_end(dev);
if (dev->flags & MLX4_FLAG_SRIOV && !active_vfs) {
mlx4_warn(dev, "Disabling SR-IOV\n");
pci_disable_sriov(pdev);
}
pci_release_regions(pdev);
pci_disable_device(pdev);
kfree(dev->persist);
kfree(priv);
pci_set_drvdata(pdev, NULL);
}
static int restore_current_port_types(struct mlx4_dev *dev,
enum mlx4_port_type *types,
enum mlx4_port_type *poss_types)
{
struct mlx4_priv *priv = mlx4_priv(dev);
int err, i;
mlx4_stop_sense(dev);
mutex_lock(&priv->port_mutex);
for (i = 0; i < dev->caps.num_ports; i++)
dev->caps.possible_type[i + 1] = poss_types[i];
err = mlx4_change_port_types(dev, types);
mlx4_start_sense(dev);
mutex_unlock(&priv->port_mutex);
return err;
}
int mlx4_restart_one(struct pci_dev *pdev)
{
struct mlx4_dev_persistent *persist = pci_get_drvdata(pdev);
struct mlx4_dev *dev = persist->dev;
struct mlx4_priv *priv = mlx4_priv(dev);
int nvfs[MLX4_MAX_PORTS + 1] = {0, 0, 0};
int pci_dev_data, err, total_vfs;
pci_dev_data = priv->pci_dev_data;
total_vfs = dev->persist->num_vfs;
memcpy(nvfs, dev->persist->nvfs, sizeof(dev->persist->nvfs));
mlx4_unload_one(pdev);
err = mlx4_load_one(pdev, pci_dev_data, total_vfs, nvfs, priv, 1);
if (err) {
mlx4_err(dev, "%s: ERROR: mlx4_load_one failed, pci_name=%s, err=%d\n",
__func__, pci_name(pdev), err);
return err;
}
err = restore_current_port_types(dev, dev->persist->curr_port_type,
dev->persist->curr_port_poss_type);
if (err)
mlx4_err(dev, "could not restore original port types (%d)\n",
err);
return err;
}
static const struct pci_device_id mlx4_pci_table[] = {
/* MT25408 "Hermon" SDR */
{ PCI_VDEVICE(MELLANOX, 0x6340), MLX4_PCI_DEV_FORCE_SENSE_PORT },
/* MT25408 "Hermon" DDR */
{ PCI_VDEVICE(MELLANOX, 0x634a), MLX4_PCI_DEV_FORCE_SENSE_PORT },
/* MT25408 "Hermon" QDR */
{ PCI_VDEVICE(MELLANOX, 0x6354), MLX4_PCI_DEV_FORCE_SENSE_PORT },
/* MT25408 "Hermon" DDR PCIe gen2 */
{ PCI_VDEVICE(MELLANOX, 0x6732), MLX4_PCI_DEV_FORCE_SENSE_PORT },
/* MT25408 "Hermon" QDR PCIe gen2 */
{ PCI_VDEVICE(MELLANOX, 0x673c), MLX4_PCI_DEV_FORCE_SENSE_PORT },
/* MT25408 "Hermon" EN 10GigE */
{ PCI_VDEVICE(MELLANOX, 0x6368), MLX4_PCI_DEV_FORCE_SENSE_PORT },
/* MT25408 "Hermon" EN 10GigE PCIe gen2 */
{ PCI_VDEVICE(MELLANOX, 0x6750), MLX4_PCI_DEV_FORCE_SENSE_PORT },
/* MT25458 ConnectX EN 10GBASE-T 10GigE */
{ PCI_VDEVICE(MELLANOX, 0x6372), MLX4_PCI_DEV_FORCE_SENSE_PORT },
/* MT25458 ConnectX EN 10GBASE-T+Gen2 10GigE */
{ PCI_VDEVICE(MELLANOX, 0x675a), MLX4_PCI_DEV_FORCE_SENSE_PORT },
/* MT26468 ConnectX EN 10GigE PCIe gen2*/
{ PCI_VDEVICE(MELLANOX, 0x6764), MLX4_PCI_DEV_FORCE_SENSE_PORT },
/* MT26438 ConnectX EN 40GigE PCIe gen2 5GT/s */
{ PCI_VDEVICE(MELLANOX, 0x6746), MLX4_PCI_DEV_FORCE_SENSE_PORT },
/* MT26478 ConnectX2 40GigE PCIe gen2 */
{ PCI_VDEVICE(MELLANOX, 0x676e), MLX4_PCI_DEV_FORCE_SENSE_PORT },
/* MT25400 Family [ConnectX-2 Virtual Function] */
{ PCI_VDEVICE(MELLANOX, 0x1002), MLX4_PCI_DEV_IS_VF },
/* MT27500 Family [ConnectX-3] */
{ PCI_VDEVICE(MELLANOX, 0x1003), 0 },
/* MT27500 Family [ConnectX-3 Virtual Function] */
{ PCI_VDEVICE(MELLANOX, 0x1004), MLX4_PCI_DEV_IS_VF },
{ PCI_VDEVICE(MELLANOX, 0x1005), 0 }, /* MT27510 Family */
{ PCI_VDEVICE(MELLANOX, 0x1006), 0 }, /* MT27511 Family */
{ PCI_VDEVICE(MELLANOX, 0x1007), 0 }, /* MT27520 Family */
{ PCI_VDEVICE(MELLANOX, 0x1008), 0 }, /* MT27521 Family */
{ PCI_VDEVICE(MELLANOX, 0x1009), 0 }, /* MT27530 Family */
{ PCI_VDEVICE(MELLANOX, 0x100a), 0 }, /* MT27531 Family */
{ PCI_VDEVICE(MELLANOX, 0x100b), 0 }, /* MT27540 Family */
{ PCI_VDEVICE(MELLANOX, 0x100c), 0 }, /* MT27541 Family */
{ PCI_VDEVICE(MELLANOX, 0x100d), 0 }, /* MT27550 Family */
{ PCI_VDEVICE(MELLANOX, 0x100e), 0 }, /* MT27551 Family */
{ PCI_VDEVICE(MELLANOX, 0x100f), 0 }, /* MT27560 Family */
{ PCI_VDEVICE(MELLANOX, 0x1010), 0 }, /* MT27561 Family */
{ 0, }
};
MODULE_DEVICE_TABLE(pci, mlx4_pci_table);
static pci_ers_result_t mlx4_pci_err_detected(struct pci_dev *pdev,
pci_channel_state_t state)
{
struct mlx4_dev_persistent *persist = pci_get_drvdata(pdev);
mlx4_err(persist->dev, "mlx4_pci_err_detected was called\n");
mlx4_enter_error_state(persist);
mutex_lock(&persist->interface_state_mutex);
if (persist->interface_state & MLX4_INTERFACE_STATE_UP)
mlx4_unload_one(pdev);
mutex_unlock(&persist->interface_state_mutex);
if (state == pci_channel_io_perm_failure)
return PCI_ERS_RESULT_DISCONNECT;
pci_disable_device(pdev);
return PCI_ERS_RESULT_NEED_RESET;
}
static pci_ers_result_t mlx4_pci_slot_reset(struct pci_dev *pdev)
{
struct mlx4_dev_persistent *persist = pci_get_drvdata(pdev);
struct mlx4_dev *dev = persist->dev;
struct mlx4_priv *priv = mlx4_priv(dev);
int ret;
int nvfs[MLX4_MAX_PORTS + 1] = {0, 0, 0};
int total_vfs;
mlx4_err(dev, "mlx4_pci_slot_reset was called\n");
ret = pci_enable_device(pdev);
if (ret) {
mlx4_err(dev, "Can not re-enable device, ret=%d\n", ret);
return PCI_ERS_RESULT_DISCONNECT;
}
pci_set_master(pdev);
pci_restore_state(pdev);
pci_save_state(pdev);
total_vfs = dev->persist->num_vfs;
memcpy(nvfs, dev->persist->nvfs, sizeof(dev->persist->nvfs));
mutex_lock(&persist->interface_state_mutex);
if (!(persist->interface_state & MLX4_INTERFACE_STATE_UP)) {
ret = mlx4_load_one(pdev, priv->pci_dev_data, total_vfs, nvfs,
priv, 1);
if (ret) {
mlx4_err(dev, "%s: mlx4_load_one failed, ret=%d\n",
__func__, ret);
goto end;
}
ret = restore_current_port_types(dev, dev->persist->
curr_port_type, dev->persist->
curr_port_poss_type);
if (ret)
mlx4_err(dev, "could not restore original port types (%d)\n", ret);
}
end:
mutex_unlock(&persist->interface_state_mutex);
return ret ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_RECOVERED;
}
static void mlx4_shutdown(struct pci_dev *pdev)
{
struct mlx4_dev_persistent *persist = pci_get_drvdata(pdev);
mlx4_info(persist->dev, "mlx4_shutdown was called\n");
mutex_lock(&persist->interface_state_mutex);
if (persist->interface_state & MLX4_INTERFACE_STATE_UP)
mlx4_unload_one(pdev);
mutex_unlock(&persist->interface_state_mutex);
}
static const struct pci_error_handlers mlx4_err_handler = {
.error_detected = mlx4_pci_err_detected,
.slot_reset = mlx4_pci_slot_reset,
};
static struct pci_driver mlx4_driver = {
.name = DRV_NAME,
.id_table = mlx4_pci_table,
.probe = mlx4_init_one,
.shutdown = mlx4_shutdown,
.remove = mlx4_remove_one,
.err_handler = &mlx4_err_handler,
};
static int __init mlx4_verify_params(void)
{
if ((log_num_mac < 0) || (log_num_mac > 7)) {
pr_warn("mlx4_core: bad num_mac: %d\n", log_num_mac);
return -1;
}
if (log_num_vlan != 0)
pr_warn("mlx4_core: log_num_vlan - obsolete module param, using %d\n",
MLX4_LOG_NUM_VLANS);
if (use_prio != 0)
pr_warn("mlx4_core: use_prio - obsolete module param, ignored\n");
if ((log_mtts_per_seg < 1) || (log_mtts_per_seg > 7)) {
pr_warn("mlx4_core: bad log_mtts_per_seg: %d\n",
log_mtts_per_seg);
return -1;
}
/* Check if module param for ports type has legal combination */
if (port_type_array[0] == false && port_type_array[1] == true) {
pr_warn("Module parameter configuration ETH/IB is not supported. Switching to default configuration IB/IB\n");
port_type_array[0] = true;
}
if (mlx4_log_num_mgm_entry_size < -7 ||
(mlx4_log_num_mgm_entry_size > 0 &&
(mlx4_log_num_mgm_entry_size < MLX4_MIN_MGM_LOG_ENTRY_SIZE ||
mlx4_log_num_mgm_entry_size > MLX4_MAX_MGM_LOG_ENTRY_SIZE))) {
pr_warn("mlx4_core: mlx4_log_num_mgm_entry_size (%d) not in legal range (-7..0 or %d..%d)\n",
mlx4_log_num_mgm_entry_size,
MLX4_MIN_MGM_LOG_ENTRY_SIZE,
MLX4_MAX_MGM_LOG_ENTRY_SIZE);
return -1;
}
return 0;
}
static int __init mlx4_init(void)
{
int ret;
if (mlx4_verify_params())
return -EINVAL;
mlx4_wq = create_singlethread_workqueue("mlx4");
if (!mlx4_wq)
return -ENOMEM;
ret = pci_register_driver(&mlx4_driver);
if (ret < 0)
destroy_workqueue(mlx4_wq);
return ret < 0 ? ret : 0;
}
static void __exit mlx4_cleanup(void)
{
pci_unregister_driver(&mlx4_driver);
destroy_workqueue(mlx4_wq);
}
module_init(mlx4_init);
module_exit(mlx4_cleanup);