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android_kernel_xiaomi_sm8350/drivers/infiniband/hw/mthca/mthca_main.c
Michael S. Tsirkin abf45dbb5b IB/mthca: Disable tuning PCI read burst size 
The PCI spec recommends against drivers playing with a device's PCI
read burst size, and says that systems software should configure it.
And we actually have users that report that changing it from the
default set by BIOS hurts performance and/or stability for them.  On
the other hand, the Mellanox Programmer's Reference Manual recommends
turning it up all the way to the maximum value.  Some tests conducted
here in the lab do not show performance improvement from this tuning,
but this might be just me.

As a work-around, make this tuning an option, off by default (safe
value), with an eye towards removing it completely one day if no one
complains.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-04-10 09:43:58 -07:00

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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 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* $Id: mthca_main.c 1396 2004-12-28 04:10:27Z roland $
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include "mthca_dev.h"
#include "mthca_config_reg.h"
#include "mthca_cmd.h"
#include "mthca_profile.h"
#include "mthca_memfree.h"
MODULE_AUTHOR("Roland Dreier");
MODULE_DESCRIPTION("Mellanox InfiniBand HCA low-level driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(DRV_VERSION);
#ifdef CONFIG_INFINIBAND_MTHCA_DEBUG
int mthca_debug_level = 0;
module_param_named(debug_level, mthca_debug_level, int, 0644);
MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
#endif /* CONFIG_INFINIBAND_MTHCA_DEBUG */
#ifdef CONFIG_PCI_MSI
static int msi_x = 0;
module_param(msi_x, int, 0444);
MODULE_PARM_DESC(msi_x, "attempt to use MSI-X if nonzero");
static int msi = 0;
module_param(msi, int, 0444);
MODULE_PARM_DESC(msi, "attempt to use MSI if nonzero");
#else /* CONFIG_PCI_MSI */
#define msi_x (0)
#define msi (0)
#endif /* CONFIG_PCI_MSI */
static int tune_pci = 0;
module_param(tune_pci, int, 0444);
MODULE_PARM_DESC(tune_pci, "increase PCI burst from the default set by BIOS if nonzero");
static const char mthca_version[] __devinitdata =
DRV_NAME ": Mellanox InfiniBand HCA driver v"
DRV_VERSION " (" DRV_RELDATE ")\n";
static struct mthca_profile default_profile = {
.num_qp = 1 << 16,
.rdb_per_qp = 4,
.num_cq = 1 << 16,
.num_mcg = 1 << 13,
.num_mpt = 1 << 17,
.num_mtt = 1 << 20,
.num_udav = 1 << 15, /* Tavor only */
.fmr_reserved_mtts = 1 << 18, /* Tavor only */
.uarc_size = 1 << 18, /* Arbel only */
};
static int __devinit mthca_tune_pci(struct mthca_dev *mdev)
{
int cap;
u16 val;
if (!tune_pci)
return 0;
/* First try to max out Read Byte Count */
cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_PCIX);
if (cap) {
if (pci_read_config_word(mdev->pdev, cap + PCI_X_CMD, &val)) {
mthca_err(mdev, "Couldn't read PCI-X command register, "
"aborting.\n");
return -ENODEV;
}
val = (val & ~PCI_X_CMD_MAX_READ) | (3 << 2);
if (pci_write_config_word(mdev->pdev, cap + PCI_X_CMD, val)) {
mthca_err(mdev, "Couldn't write PCI-X command register, "
"aborting.\n");
return -ENODEV;
}
} else if (!(mdev->mthca_flags & MTHCA_FLAG_PCIE))
mthca_info(mdev, "No PCI-X capability, not setting RBC.\n");
cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_EXP);
if (cap) {
if (pci_read_config_word(mdev->pdev, cap + PCI_EXP_DEVCTL, &val)) {
mthca_err(mdev, "Couldn't read PCI Express device control "
"register, aborting.\n");
return -ENODEV;
}
val = (val & ~PCI_EXP_DEVCTL_READRQ) | (5 << 12);
if (pci_write_config_word(mdev->pdev, cap + PCI_EXP_DEVCTL, val)) {
mthca_err(mdev, "Couldn't write PCI Express device control "
"register, aborting.\n");
return -ENODEV;
}
} else if (mdev->mthca_flags & MTHCA_FLAG_PCIE)
mthca_info(mdev, "No PCI Express capability, "
"not setting Max Read Request Size.\n");
return 0;
}
static int __devinit mthca_dev_lim(struct mthca_dev *mdev, struct mthca_dev_lim *dev_lim)
{
int err;
u8 status;
err = mthca_QUERY_DEV_LIM(mdev, dev_lim, &status);
if (err) {
mthca_err(mdev, "QUERY_DEV_LIM command failed, aborting.\n");
return err;
}
if (status) {
mthca_err(mdev, "QUERY_DEV_LIM returned status 0x%02x, "
"aborting.\n", status);
return -EINVAL;
}
if (dev_lim->min_page_sz > PAGE_SIZE) {
mthca_err(mdev, "HCA minimum page size of %d bigger than "
"kernel PAGE_SIZE of %ld, aborting.\n",
dev_lim->min_page_sz, PAGE_SIZE);
return -ENODEV;
}
if (dev_lim->num_ports > MTHCA_MAX_PORTS) {
mthca_err(mdev, "HCA has %d ports, but we only support %d, "
"aborting.\n",
dev_lim->num_ports, MTHCA_MAX_PORTS);
return -ENODEV;
}
if (dev_lim->uar_size > pci_resource_len(mdev->pdev, 2)) {
mthca_err(mdev, "HCA reported UAR size of 0x%x bigger than "
"PCI resource 2 size of 0x%lx, aborting.\n",
dev_lim->uar_size, pci_resource_len(mdev->pdev, 2));
return -ENODEV;
}
mdev->limits.num_ports = dev_lim->num_ports;
mdev->limits.vl_cap = dev_lim->max_vl;
mdev->limits.mtu_cap = dev_lim->max_mtu;
mdev->limits.gid_table_len = dev_lim->max_gids;
mdev->limits.pkey_table_len = dev_lim->max_pkeys;
mdev->limits.local_ca_ack_delay = dev_lim->local_ca_ack_delay;
mdev->limits.max_sg = dev_lim->max_sg;
mdev->limits.max_wqes = dev_lim->max_qp_sz;
mdev->limits.max_qp_init_rdma = dev_lim->max_requester_per_qp;
mdev->limits.reserved_qps = dev_lim->reserved_qps;
mdev->limits.max_srq_wqes = dev_lim->max_srq_sz;
mdev->limits.reserved_srqs = dev_lim->reserved_srqs;
mdev->limits.reserved_eecs = dev_lim->reserved_eecs;
mdev->limits.max_desc_sz = dev_lim->max_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.
*/
mdev->limits.max_cqes = dev_lim->max_cq_sz - 1;
mdev->limits.reserved_cqs = dev_lim->reserved_cqs;
mdev->limits.reserved_eqs = dev_lim->reserved_eqs;
mdev->limits.reserved_mtts = dev_lim->reserved_mtts;
mdev->limits.reserved_mrws = dev_lim->reserved_mrws;
mdev->limits.reserved_uars = dev_lim->reserved_uars;
mdev->limits.reserved_pds = dev_lim->reserved_pds;
mdev->limits.port_width_cap = dev_lim->max_port_width;
mdev->limits.page_size_cap = ~(u32) (dev_lim->min_page_sz - 1);
mdev->limits.flags = dev_lim->flags;
/*
* For old FW that doesn't return static rate support, use a
* value of 0x3 (only static rate values of 0 or 1 are handled),
* except on Sinai, where even old FW can handle static rate
* values of 2 and 3.
*/
if (dev_lim->stat_rate_support)
mdev->limits.stat_rate_support = dev_lim->stat_rate_support;
else if (mdev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
mdev->limits.stat_rate_support = 0xf;
else
mdev->limits.stat_rate_support = 0x3;
/* IB_DEVICE_RESIZE_MAX_WR not supported by driver.
May be doable since hardware supports it for SRQ.
IB_DEVICE_N_NOTIFY_CQ is supported by hardware but not by driver.
IB_DEVICE_SRQ_RESIZE is supported by hardware but SRQ is not
supported by driver. */
mdev->device_cap_flags = IB_DEVICE_CHANGE_PHY_PORT |
IB_DEVICE_PORT_ACTIVE_EVENT |
IB_DEVICE_SYS_IMAGE_GUID |
IB_DEVICE_RC_RNR_NAK_GEN;
if (dev_lim->flags & DEV_LIM_FLAG_BAD_PKEY_CNTR)
mdev->device_cap_flags |= IB_DEVICE_BAD_PKEY_CNTR;
if (dev_lim->flags & DEV_LIM_FLAG_BAD_QKEY_CNTR)
mdev->device_cap_flags |= IB_DEVICE_BAD_QKEY_CNTR;
if (dev_lim->flags & DEV_LIM_FLAG_RAW_MULTI)
mdev->device_cap_flags |= IB_DEVICE_RAW_MULTI;
if (dev_lim->flags & DEV_LIM_FLAG_AUTO_PATH_MIG)
mdev->device_cap_flags |= IB_DEVICE_AUTO_PATH_MIG;
if (dev_lim->flags & DEV_LIM_FLAG_UD_AV_PORT_ENFORCE)
mdev->device_cap_flags |= IB_DEVICE_UD_AV_PORT_ENFORCE;
if (dev_lim->flags & DEV_LIM_FLAG_SRQ)
mdev->mthca_flags |= MTHCA_FLAG_SRQ;
return 0;
}
static int __devinit mthca_init_tavor(struct mthca_dev *mdev)
{
u8 status;
int err;
struct mthca_dev_lim dev_lim;
struct mthca_profile profile;
struct mthca_init_hca_param init_hca;
err = mthca_SYS_EN(mdev, &status);
if (err) {
mthca_err(mdev, "SYS_EN command failed, aborting.\n");
return err;
}
if (status) {
mthca_err(mdev, "SYS_EN returned status 0x%02x, "
"aborting.\n", status);
return -EINVAL;
}
err = mthca_QUERY_FW(mdev, &status);
if (err) {
mthca_err(mdev, "QUERY_FW command failed, aborting.\n");
goto err_disable;
}
if (status) {
mthca_err(mdev, "QUERY_FW returned status 0x%02x, "
"aborting.\n", status);
err = -EINVAL;
goto err_disable;
}
err = mthca_QUERY_DDR(mdev, &status);
if (err) {
mthca_err(mdev, "QUERY_DDR command failed, aborting.\n");
goto err_disable;
}
if (status) {
mthca_err(mdev, "QUERY_DDR returned status 0x%02x, "
"aborting.\n", status);
err = -EINVAL;
goto err_disable;
}
err = mthca_dev_lim(mdev, &dev_lim);
if (err) {
mthca_err(mdev, "QUERY_DEV_LIM command failed, aborting.\n");
goto err_disable;
}
profile = default_profile;
profile.num_uar = dev_lim.uar_size / PAGE_SIZE;
profile.uarc_size = 0;
if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
profile.num_srq = dev_lim.max_srqs;
err = mthca_make_profile(mdev, &profile, &dev_lim, &init_hca);
if (err < 0)
goto err_disable;
err = mthca_INIT_HCA(mdev, &init_hca, &status);
if (err) {
mthca_err(mdev, "INIT_HCA command failed, aborting.\n");
goto err_disable;
}
if (status) {
mthca_err(mdev, "INIT_HCA returned status 0x%02x, "
"aborting.\n", status);
err = -EINVAL;
goto err_disable;
}
return 0;
err_disable:
mthca_SYS_DIS(mdev, &status);
return err;
}
static int __devinit mthca_load_fw(struct mthca_dev *mdev)
{
u8 status;
int err;
/* FIXME: use HCA-attached memory for FW if present */
mdev->fw.arbel.fw_icm =
mthca_alloc_icm(mdev, mdev->fw.arbel.fw_pages,
GFP_HIGHUSER | __GFP_NOWARN);
if (!mdev->fw.arbel.fw_icm) {
mthca_err(mdev, "Couldn't allocate FW area, aborting.\n");
return -ENOMEM;
}
err = mthca_MAP_FA(mdev, mdev->fw.arbel.fw_icm, &status);
if (err) {
mthca_err(mdev, "MAP_FA command failed, aborting.\n");
goto err_free;
}
if (status) {
mthca_err(mdev, "MAP_FA returned status 0x%02x, aborting.\n", status);
err = -EINVAL;
goto err_free;
}
err = mthca_RUN_FW(mdev, &status);
if (err) {
mthca_err(mdev, "RUN_FW command failed, aborting.\n");
goto err_unmap_fa;
}
if (status) {
mthca_err(mdev, "RUN_FW returned status 0x%02x, aborting.\n", status);
err = -EINVAL;
goto err_unmap_fa;
}
return 0;
err_unmap_fa:
mthca_UNMAP_FA(mdev, &status);
err_free:
mthca_free_icm(mdev, mdev->fw.arbel.fw_icm);
return err;
}
static int __devinit mthca_init_icm(struct mthca_dev *mdev,
struct mthca_dev_lim *dev_lim,
struct mthca_init_hca_param *init_hca,
u64 icm_size)
{
u64 aux_pages;
u8 status;
int err;
err = mthca_SET_ICM_SIZE(mdev, icm_size, &aux_pages, &status);
if (err) {
mthca_err(mdev, "SET_ICM_SIZE command failed, aborting.\n");
return err;
}
if (status) {
mthca_err(mdev, "SET_ICM_SIZE returned status 0x%02x, "
"aborting.\n", status);
return -EINVAL;
}
mthca_dbg(mdev, "%lld KB of HCA context requires %lld KB aux memory.\n",
(unsigned long long) icm_size >> 10,
(unsigned long long) aux_pages << 2);
mdev->fw.arbel.aux_icm = mthca_alloc_icm(mdev, aux_pages,
GFP_HIGHUSER | __GFP_NOWARN);
if (!mdev->fw.arbel.aux_icm) {
mthca_err(mdev, "Couldn't allocate aux memory, aborting.\n");
return -ENOMEM;
}
err = mthca_MAP_ICM_AUX(mdev, mdev->fw.arbel.aux_icm, &status);
if (err) {
mthca_err(mdev, "MAP_ICM_AUX command failed, aborting.\n");
goto err_free_aux;
}
if (status) {
mthca_err(mdev, "MAP_ICM_AUX returned status 0x%02x, aborting.\n", status);
err = -EINVAL;
goto err_free_aux;
}
err = mthca_map_eq_icm(mdev, init_hca->eqc_base);
if (err) {
mthca_err(mdev, "Failed to map EQ context memory, aborting.\n");
goto err_unmap_aux;
}
mdev->mr_table.mtt_table = mthca_alloc_icm_table(mdev, init_hca->mtt_base,
MTHCA_MTT_SEG_SIZE,
mdev->limits.num_mtt_segs,
mdev->limits.reserved_mtts, 1);
if (!mdev->mr_table.mtt_table) {
mthca_err(mdev, "Failed to map MTT context memory, aborting.\n");
err = -ENOMEM;
goto err_unmap_eq;
}
mdev->mr_table.mpt_table = mthca_alloc_icm_table(mdev, init_hca->mpt_base,
dev_lim->mpt_entry_sz,
mdev->limits.num_mpts,
mdev->limits.reserved_mrws, 1);
if (!mdev->mr_table.mpt_table) {
mthca_err(mdev, "Failed to map MPT context memory, aborting.\n");
err = -ENOMEM;
goto err_unmap_mtt;
}
mdev->qp_table.qp_table = mthca_alloc_icm_table(mdev, init_hca->qpc_base,
dev_lim->qpc_entry_sz,
mdev->limits.num_qps,
mdev->limits.reserved_qps, 0);
if (!mdev->qp_table.qp_table) {
mthca_err(mdev, "Failed to map QP context memory, aborting.\n");
err = -ENOMEM;
goto err_unmap_mpt;
}
mdev->qp_table.eqp_table = mthca_alloc_icm_table(mdev, init_hca->eqpc_base,
dev_lim->eqpc_entry_sz,
mdev->limits.num_qps,
mdev->limits.reserved_qps, 0);
if (!mdev->qp_table.eqp_table) {
mthca_err(mdev, "Failed to map EQP context memory, aborting.\n");
err = -ENOMEM;
goto err_unmap_qp;
}
mdev->qp_table.rdb_table = mthca_alloc_icm_table(mdev, init_hca->rdb_base,
MTHCA_RDB_ENTRY_SIZE,
mdev->limits.num_qps <<
mdev->qp_table.rdb_shift,
0, 0);
if (!mdev->qp_table.rdb_table) {
mthca_err(mdev, "Failed to map RDB context memory, aborting\n");
err = -ENOMEM;
goto err_unmap_eqp;
}
mdev->cq_table.table = mthca_alloc_icm_table(mdev, init_hca->cqc_base,
dev_lim->cqc_entry_sz,
mdev->limits.num_cqs,
mdev->limits.reserved_cqs, 0);
if (!mdev->cq_table.table) {
mthca_err(mdev, "Failed to map CQ context memory, aborting.\n");
err = -ENOMEM;
goto err_unmap_rdb;
}
if (mdev->mthca_flags & MTHCA_FLAG_SRQ) {
mdev->srq_table.table =
mthca_alloc_icm_table(mdev, init_hca->srqc_base,
dev_lim->srq_entry_sz,
mdev->limits.num_srqs,
mdev->limits.reserved_srqs, 0);
if (!mdev->srq_table.table) {
mthca_err(mdev, "Failed to map SRQ context memory, "
"aborting.\n");
err = -ENOMEM;
goto err_unmap_cq;
}
}
/*
* 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.
*/
mdev->mcg_table.table = mthca_alloc_icm_table(mdev, init_hca->mc_base,
MTHCA_MGM_ENTRY_SIZE,
mdev->limits.num_mgms +
mdev->limits.num_amgms,
mdev->limits.num_mgms +
mdev->limits.num_amgms,
0);
if (!mdev->mcg_table.table) {
mthca_err(mdev, "Failed to map MCG context memory, aborting.\n");
err = -ENOMEM;
goto err_unmap_srq;
}
return 0;
err_unmap_srq:
if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
mthca_free_icm_table(mdev, mdev->srq_table.table);
err_unmap_cq:
mthca_free_icm_table(mdev, mdev->cq_table.table);
err_unmap_rdb:
mthca_free_icm_table(mdev, mdev->qp_table.rdb_table);
err_unmap_eqp:
mthca_free_icm_table(mdev, mdev->qp_table.eqp_table);
err_unmap_qp:
mthca_free_icm_table(mdev, mdev->qp_table.qp_table);
err_unmap_mpt:
mthca_free_icm_table(mdev, mdev->mr_table.mpt_table);
err_unmap_mtt:
mthca_free_icm_table(mdev, mdev->mr_table.mtt_table);
err_unmap_eq:
mthca_unmap_eq_icm(mdev);
err_unmap_aux:
mthca_UNMAP_ICM_AUX(mdev, &status);
err_free_aux:
mthca_free_icm(mdev, mdev->fw.arbel.aux_icm);
return err;
}
static void mthca_free_icms(struct mthca_dev *mdev)
{
u8 status;
mthca_free_icm_table(mdev, mdev->mcg_table.table);
if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
mthca_free_icm_table(mdev, mdev->srq_table.table);
mthca_free_icm_table(mdev, mdev->cq_table.table);
mthca_free_icm_table(mdev, mdev->qp_table.rdb_table);
mthca_free_icm_table(mdev, mdev->qp_table.eqp_table);
mthca_free_icm_table(mdev, mdev->qp_table.qp_table);
mthca_free_icm_table(mdev, mdev->mr_table.mpt_table);
mthca_free_icm_table(mdev, mdev->mr_table.mtt_table);
mthca_unmap_eq_icm(mdev);
mthca_UNMAP_ICM_AUX(mdev, &status);
mthca_free_icm(mdev, mdev->fw.arbel.aux_icm);
}
static int __devinit mthca_init_arbel(struct mthca_dev *mdev)
{
struct mthca_dev_lim dev_lim;
struct mthca_profile profile;
struct mthca_init_hca_param init_hca;
u64 icm_size;
u8 status;
int err;
err = mthca_QUERY_FW(mdev, &status);
if (err) {
mthca_err(mdev, "QUERY_FW command failed, aborting.\n");
return err;
}
if (status) {
mthca_err(mdev, "QUERY_FW returned status 0x%02x, "
"aborting.\n", status);
return -EINVAL;
}
err = mthca_ENABLE_LAM(mdev, &status);
if (err) {
mthca_err(mdev, "ENABLE_LAM command failed, aborting.\n");
return err;
}
if (status == MTHCA_CMD_STAT_LAM_NOT_PRE) {
mthca_dbg(mdev, "No HCA-attached memory (running in MemFree mode)\n");
mdev->mthca_flags |= MTHCA_FLAG_NO_LAM;
} else if (status) {
mthca_err(mdev, "ENABLE_LAM returned status 0x%02x, "
"aborting.\n", status);
return -EINVAL;
}
err = mthca_load_fw(mdev);
if (err) {
mthca_err(mdev, "Failed to start FW, aborting.\n");
goto err_disable;
}
err = mthca_dev_lim(mdev, &dev_lim);
if (err) {
mthca_err(mdev, "QUERY_DEV_LIM command failed, aborting.\n");
goto err_stop_fw;
}
profile = default_profile;
profile.num_uar = dev_lim.uar_size / PAGE_SIZE;
profile.num_udav = 0;
if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
profile.num_srq = dev_lim.max_srqs;
icm_size = mthca_make_profile(mdev, &profile, &dev_lim, &init_hca);
if ((int) icm_size < 0) {
err = icm_size;
goto err_stop_fw;
}
err = mthca_init_icm(mdev, &dev_lim, &init_hca, icm_size);
if (err)
goto err_stop_fw;
err = mthca_INIT_HCA(mdev, &init_hca, &status);
if (err) {
mthca_err(mdev, "INIT_HCA command failed, aborting.\n");
goto err_free_icm;
}
if (status) {
mthca_err(mdev, "INIT_HCA returned status 0x%02x, "
"aborting.\n", status);
err = -EINVAL;
goto err_free_icm;
}
return 0;
err_free_icm:
mthca_free_icms(mdev);
err_stop_fw:
mthca_UNMAP_FA(mdev, &status);
mthca_free_icm(mdev, mdev->fw.arbel.fw_icm);
err_disable:
if (!(mdev->mthca_flags & MTHCA_FLAG_NO_LAM))
mthca_DISABLE_LAM(mdev, &status);
return err;
}
static void mthca_close_hca(struct mthca_dev *mdev)
{
u8 status;
mthca_CLOSE_HCA(mdev, 0, &status);
if (mthca_is_memfree(mdev)) {
mthca_free_icms(mdev);
mthca_UNMAP_FA(mdev, &status);
mthca_free_icm(mdev, mdev->fw.arbel.fw_icm);
if (!(mdev->mthca_flags & MTHCA_FLAG_NO_LAM))
mthca_DISABLE_LAM(mdev, &status);
} else
mthca_SYS_DIS(mdev, &status);
}
static int __devinit mthca_init_hca(struct mthca_dev *mdev)
{
u8 status;
int err;
struct mthca_adapter adapter;
if (mthca_is_memfree(mdev))
err = mthca_init_arbel(mdev);
else
err = mthca_init_tavor(mdev);
if (err)
return err;
err = mthca_QUERY_ADAPTER(mdev, &adapter, &status);
if (err) {
mthca_err(mdev, "QUERY_ADAPTER command failed, aborting.\n");
goto err_close;
}
if (status) {
mthca_err(mdev, "QUERY_ADAPTER returned status 0x%02x, "
"aborting.\n", status);
err = -EINVAL;
goto err_close;
}
mdev->eq_table.inta_pin = adapter.inta_pin;
mdev->rev_id = adapter.revision_id;
memcpy(mdev->board_id, adapter.board_id, sizeof mdev->board_id);
return 0;
err_close:
mthca_close_hca(mdev);
return err;
}
static int __devinit mthca_setup_hca(struct mthca_dev *dev)
{
int err;
u8 status;
MTHCA_INIT_DOORBELL_LOCK(&dev->doorbell_lock);
err = mthca_init_uar_table(dev);
if (err) {
mthca_err(dev, "Failed to initialize "
"user access region table, aborting.\n");
return err;
}
err = mthca_uar_alloc(dev, &dev->driver_uar);
if (err) {
mthca_err(dev, "Failed to allocate driver access region, "
"aborting.\n");
goto err_uar_table_free;
}
dev->kar = ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
if (!dev->kar) {
mthca_err(dev, "Couldn't map kernel access region, "
"aborting.\n");
err = -ENOMEM;
goto err_uar_free;
}
err = mthca_init_pd_table(dev);
if (err) {
mthca_err(dev, "Failed to initialize "
"protection domain table, aborting.\n");
goto err_kar_unmap;
}
err = mthca_init_mr_table(dev);
if (err) {
mthca_err(dev, "Failed to initialize "
"memory region table, aborting.\n");
goto err_pd_table_free;
}
err = mthca_pd_alloc(dev, 1, &dev->driver_pd);
if (err) {
mthca_err(dev, "Failed to create driver PD, "
"aborting.\n");
goto err_mr_table_free;
}
err = mthca_init_eq_table(dev);
if (err) {
mthca_err(dev, "Failed to initialize "
"event queue table, aborting.\n");
goto err_pd_free;
}
err = mthca_cmd_use_events(dev);
if (err) {
mthca_err(dev, "Failed to switch to event-driven "
"firmware commands, aborting.\n");
goto err_eq_table_free;
}
err = mthca_NOP(dev, &status);
if (err || status) {
mthca_err(dev, "NOP command failed to generate interrupt (IRQ %d), aborting.\n",
dev->mthca_flags & MTHCA_FLAG_MSI_X ?
dev->eq_table.eq[MTHCA_EQ_CMD].msi_x_vector :
dev->pdev->irq);
if (dev->mthca_flags & (MTHCA_FLAG_MSI | MTHCA_FLAG_MSI_X))
mthca_err(dev, "Try again with MSI/MSI-X disabled.\n");
else
mthca_err(dev, "BIOS or ACPI interrupt routing problem?\n");
goto err_cmd_poll;
}
mthca_dbg(dev, "NOP command IRQ test passed\n");
err = mthca_init_cq_table(dev);
if (err) {
mthca_err(dev, "Failed to initialize "
"completion queue table, aborting.\n");
goto err_cmd_poll;
}
err = mthca_init_srq_table(dev);
if (err) {
mthca_err(dev, "Failed to initialize "
"shared receive queue table, aborting.\n");
goto err_cq_table_free;
}
err = mthca_init_qp_table(dev);
if (err) {
mthca_err(dev, "Failed to initialize "
"queue pair table, aborting.\n");
goto err_srq_table_free;
}
err = mthca_init_av_table(dev);
if (err) {
mthca_err(dev, "Failed to initialize "
"address vector table, aborting.\n");
goto err_qp_table_free;
}
err = mthca_init_mcg_table(dev);
if (err) {
mthca_err(dev, "Failed to initialize "
"multicast group table, aborting.\n");
goto err_av_table_free;
}
return 0;
err_av_table_free:
mthca_cleanup_av_table(dev);
err_qp_table_free:
mthca_cleanup_qp_table(dev);
err_srq_table_free:
mthca_cleanup_srq_table(dev);
err_cq_table_free:
mthca_cleanup_cq_table(dev);
err_cmd_poll:
mthca_cmd_use_polling(dev);
err_eq_table_free:
mthca_cleanup_eq_table(dev);
err_pd_free:
mthca_pd_free(dev, &dev->driver_pd);
err_mr_table_free:
mthca_cleanup_mr_table(dev);
err_pd_table_free:
mthca_cleanup_pd_table(dev);
err_kar_unmap:
iounmap(dev->kar);
err_uar_free:
mthca_uar_free(dev, &dev->driver_uar);
err_uar_table_free:
mthca_cleanup_uar_table(dev);
return err;
}
static int __devinit mthca_request_regions(struct pci_dev *pdev,
int ddr_hidden)
{
int err;
/*
* We can't just use pci_request_regions() because the MSI-X
* table is right in the middle of the first BAR. If we did
* pci_request_region and grab all of the first BAR, then
* setting up MSI-X would fail, since the PCI core wants to do
* request_mem_region on the MSI-X vector table.
*
* So just request what we need right now, and request any
* other regions we need when setting up EQs.
*/
if (!request_mem_region(pci_resource_start(pdev, 0) + MTHCA_HCR_BASE,
MTHCA_HCR_SIZE, DRV_NAME))
return -EBUSY;
err = pci_request_region(pdev, 2, DRV_NAME);
if (err)
goto err_bar2_failed;
if (!ddr_hidden) {
err = pci_request_region(pdev, 4, DRV_NAME);
if (err)
goto err_bar4_failed;
}
return 0;
err_bar4_failed:
pci_release_region(pdev, 2);
err_bar2_failed:
release_mem_region(pci_resource_start(pdev, 0) + MTHCA_HCR_BASE,
MTHCA_HCR_SIZE);
return err;
}
static void mthca_release_regions(struct pci_dev *pdev,
int ddr_hidden)
{
if (!ddr_hidden)
pci_release_region(pdev, 4);
pci_release_region(pdev, 2);
release_mem_region(pci_resource_start(pdev, 0) + MTHCA_HCR_BASE,
MTHCA_HCR_SIZE);
}
static int __devinit mthca_enable_msi_x(struct mthca_dev *mdev)
{
struct msix_entry entries[3];
int err;
entries[0].entry = 0;
entries[1].entry = 1;
entries[2].entry = 2;
err = pci_enable_msix(mdev->pdev, entries, ARRAY_SIZE(entries));
if (err) {
if (err > 0)
mthca_info(mdev, "Only %d MSI-X vectors available, "
"not using MSI-X\n", err);
return err;
}
mdev->eq_table.eq[MTHCA_EQ_COMP ].msi_x_vector = entries[0].vector;
mdev->eq_table.eq[MTHCA_EQ_ASYNC].msi_x_vector = entries[1].vector;
mdev->eq_table.eq[MTHCA_EQ_CMD ].msi_x_vector = entries[2].vector;
return 0;
}
/* Types of supported HCA */
enum {
TAVOR, /* MT23108 */
ARBEL_COMPAT, /* MT25208 in Tavor compat mode */
ARBEL_NATIVE, /* MT25208 with extended features */
SINAI /* MT25204 */
};
#define MTHCA_FW_VER(major, minor, subminor) \
(((u64) (major) << 32) | ((u64) (minor) << 16) | (u64) (subminor))
static struct {
u64 latest_fw;
u32 flags;
} mthca_hca_table[] = {
[TAVOR] = { .latest_fw = MTHCA_FW_VER(3, 4, 0),
.flags = 0 },
[ARBEL_COMPAT] = { .latest_fw = MTHCA_FW_VER(4, 7, 400),
.flags = MTHCA_FLAG_PCIE },
[ARBEL_NATIVE] = { .latest_fw = MTHCA_FW_VER(5, 1, 0),
.flags = MTHCA_FLAG_MEMFREE |
MTHCA_FLAG_PCIE },
[SINAI] = { .latest_fw = MTHCA_FW_VER(1, 0, 800),
.flags = MTHCA_FLAG_MEMFREE |
MTHCA_FLAG_PCIE |
MTHCA_FLAG_SINAI_OPT }
};
static int __devinit mthca_init_one(struct pci_dev *pdev,
const struct pci_device_id *id)
{
static int mthca_version_printed = 0;
int ddr_hidden = 0;
int err;
struct mthca_dev *mdev;
if (!mthca_version_printed) {
printk(KERN_INFO "%s", mthca_version);
++mthca_version_printed;
}
printk(KERN_INFO PFX "Initializing %s\n",
pci_name(pdev));
if (id->driver_data >= ARRAY_SIZE(mthca_hca_table)) {
printk(KERN_ERR PFX "%s has invalid driver data %lx\n",
pci_name(pdev), id->driver_data);
return -ENODEV;
}
err = pci_enable_device(pdev);
if (err) {
dev_err(&pdev->dev, "Cannot enable PCI device, "
"aborting.\n");
return err;
}
/*
* Check for BARs. We expect 0: 1MB, 2: 8MB, 4: DDR (may not
* be present)
*/
if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
pci_resource_len(pdev, 0) != 1 << 20) {
dev_err(&pdev->dev, "Missing DCS, aborting.\n");
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;
}
if (!(pci_resource_flags(pdev, 4) & IORESOURCE_MEM))
ddr_hidden = 1;
err = mthca_request_regions(pdev, ddr_hidden);
if (err) {
dev_err(&pdev->dev, "Cannot obtain PCI resources, "
"aborting.\n");
goto err_disable_pdev;
}
pci_set_master(pdev);
err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
if (err) {
dev_warn(&pdev->dev, "Warning: couldn't set 64-bit PCI DMA mask.\n");
err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
if (err) {
dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting.\n");
goto err_free_res;
}
}
err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
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_32BIT_MASK);
if (err) {
dev_err(&pdev->dev, "Can't set consistent PCI DMA mask, "
"aborting.\n");
goto err_free_res;
}
}
mdev = (struct mthca_dev *) ib_alloc_device(sizeof *mdev);
if (!mdev) {
dev_err(&pdev->dev, "Device struct alloc failed, "
"aborting.\n");
err = -ENOMEM;
goto err_free_res;
}
mdev->pdev = pdev;
mdev->mthca_flags = mthca_hca_table[id->driver_data].flags;
if (ddr_hidden)
mdev->mthca_flags |= MTHCA_FLAG_DDR_HIDDEN;
/*
* 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 = mthca_reset(mdev);
if (err) {
mthca_err(mdev, "Failed to reset HCA, aborting.\n");
goto err_free_dev;
}
if (msi_x && !mthca_enable_msi_x(mdev))
mdev->mthca_flags |= MTHCA_FLAG_MSI_X;
if (msi && !(mdev->mthca_flags & MTHCA_FLAG_MSI_X) &&
!pci_enable_msi(pdev))
mdev->mthca_flags |= MTHCA_FLAG_MSI;
if (mthca_cmd_init(mdev)) {
mthca_err(mdev, "Failed to init command interface, aborting.\n");
goto err_free_dev;
}
err = mthca_tune_pci(mdev);
if (err)
goto err_cmd;
err = mthca_init_hca(mdev);
if (err)
goto err_cmd;
if (mdev->fw_ver < mthca_hca_table[id->driver_data].latest_fw) {
mthca_warn(mdev, "HCA FW version %d.%d.%d is old (%d.%d.%d is current).\n",
(int) (mdev->fw_ver >> 32), (int) (mdev->fw_ver >> 16) & 0xffff,
(int) (mdev->fw_ver & 0xffff),
(int) (mthca_hca_table[id->driver_data].latest_fw >> 32),
(int) (mthca_hca_table[id->driver_data].latest_fw >> 16) & 0xffff,
(int) (mthca_hca_table[id->driver_data].latest_fw & 0xffff));
mthca_warn(mdev, "If you have problems, try updating your HCA FW.\n");
}
err = mthca_setup_hca(mdev);
if (err)
goto err_close;
err = mthca_register_device(mdev);
if (err)
goto err_cleanup;
err = mthca_create_agents(mdev);
if (err)
goto err_unregister;
pci_set_drvdata(pdev, mdev);
return 0;
err_unregister:
mthca_unregister_device(mdev);
err_cleanup:
mthca_cleanup_mcg_table(mdev);
mthca_cleanup_av_table(mdev);
mthca_cleanup_qp_table(mdev);
mthca_cleanup_srq_table(mdev);
mthca_cleanup_cq_table(mdev);
mthca_cmd_use_polling(mdev);
mthca_cleanup_eq_table(mdev);
mthca_pd_free(mdev, &mdev->driver_pd);
mthca_cleanup_mr_table(mdev);
mthca_cleanup_pd_table(mdev);
mthca_cleanup_uar_table(mdev);
err_close:
mthca_close_hca(mdev);
err_cmd:
mthca_cmd_cleanup(mdev);
err_free_dev:
if (mdev->mthca_flags & MTHCA_FLAG_MSI_X)
pci_disable_msix(pdev);
if (mdev->mthca_flags & MTHCA_FLAG_MSI)
pci_disable_msi(pdev);
ib_dealloc_device(&mdev->ib_dev);
err_free_res:
mthca_release_regions(pdev, ddr_hidden);
err_disable_pdev:
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
return err;
}
static void __devexit mthca_remove_one(struct pci_dev *pdev)
{
struct mthca_dev *mdev = pci_get_drvdata(pdev);
u8 status;
int p;
if (mdev) {
mthca_free_agents(mdev);
mthca_unregister_device(mdev);
for (p = 1; p <= mdev->limits.num_ports; ++p)
mthca_CLOSE_IB(mdev, p, &status);
mthca_cleanup_mcg_table(mdev);
mthca_cleanup_av_table(mdev);
mthca_cleanup_qp_table(mdev);
mthca_cleanup_srq_table(mdev);
mthca_cleanup_cq_table(mdev);
mthca_cmd_use_polling(mdev);
mthca_cleanup_eq_table(mdev);
mthca_pd_free(mdev, &mdev->driver_pd);
mthca_cleanup_mr_table(mdev);
mthca_cleanup_pd_table(mdev);
iounmap(mdev->kar);
mthca_uar_free(mdev, &mdev->driver_uar);
mthca_cleanup_uar_table(mdev);
mthca_close_hca(mdev);
mthca_cmd_cleanup(mdev);
if (mdev->mthca_flags & MTHCA_FLAG_MSI_X)
pci_disable_msix(pdev);
if (mdev->mthca_flags & MTHCA_FLAG_MSI)
pci_disable_msi(pdev);
ib_dealloc_device(&mdev->ib_dev);
mthca_release_regions(pdev, mdev->mthca_flags &
MTHCA_FLAG_DDR_HIDDEN);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
}
}
static struct pci_device_id mthca_pci_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR),
.driver_data = TAVOR },
{ PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_TAVOR),
.driver_data = TAVOR },
{ PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT),
.driver_data = ARBEL_COMPAT },
{ PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT),
.driver_data = ARBEL_COMPAT },
{ PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_ARBEL),
.driver_data = ARBEL_NATIVE },
{ PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_ARBEL),
.driver_data = ARBEL_NATIVE },
{ PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_SINAI),
.driver_data = SINAI },
{ PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_SINAI),
.driver_data = SINAI },
{ PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_SINAI_OLD),
.driver_data = SINAI },
{ PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_SINAI_OLD),
.driver_data = SINAI },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, mthca_pci_table);
static struct pci_driver mthca_driver = {
.name = DRV_NAME,
.id_table = mthca_pci_table,
.probe = mthca_init_one,
.remove = __devexit_p(mthca_remove_one)
};
static int __init mthca_init(void)
{
int ret;
ret = pci_register_driver(&mthca_driver);
return ret < 0 ? ret : 0;
}
static void __exit mthca_cleanup(void)
{
pci_unregister_driver(&mthca_driver);
}
module_init(mthca_init);
module_exit(mthca_cleanup);
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