Commit 5d9157aa authored by Dean Luick's avatar Dean Luick Committed by Greg Kroah-Hartman
Browse files

staging/rdma/hfi1: Read EFI variable for device description



Read an EFI variable for the device description.  Create the
infrastructure for additional variable reads.
Reviewed-by: default avatarEaswar Hariharan <easwar.hariharan@intel.com>
Signed-off-by: default avatarDean Luick <dean.luick@intel.com>
Signed-off-by: default avatarJubin John <jubin.john@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 995deafa
......@@ -7,7 +7,7 @@
#
obj-$(CONFIG_INFINIBAND_HFI1) += hfi1.o
hfi1-y := chip.o cq.o device.o diag.o dma.o driver.o eprom.o file_ops.o firmware.o \
hfi1-y := chip.o cq.o device.o diag.o dma.o driver.o efivar.o eprom.o file_ops.o firmware.o \
init.o intr.o keys.o mad.o mmap.o mr.o pcie.o pio.o pio_copy.o \
qp.o qsfp.o rc.o ruc.o sdma.o srq.o sysfs.o trace.o twsi.o \
uc.o ud.o user_pages.o user_sdma.o verbs_mcast.o verbs.o
......
......@@ -63,6 +63,7 @@
#include "pio.h"
#include "sdma.h"
#include "eprom.h"
#include "efivar.h"
#define NUM_IB_PORTS 1
......@@ -10461,6 +10462,32 @@ static void asic_should_init(struct hfi1_devdata *dd)
spin_unlock_irqrestore(&hfi1_devs_lock, flags);
}
/*
* Set dd->boardname. Use a generic name if a name is not returned from
* EFI variable space.
*
* Return 0 on success, -ENOMEM if space could not be allocated.
*/
static int obtain_boardname(struct hfi1_devdata *dd)
{
/* generic board description */
const char generic[] =
"Intel Omni-Path Host Fabric Interface Adapter 100 Series";
unsigned long size;
int ret;
ret = read_hfi1_efi_var(dd, "description", &size,
(void **)&dd->boardname);
if (ret) {
dd_dev_err(dd, "Board description not found\n");
/* use generic description */
dd->boardname = kstrdup(generic, GFP_KERNEL);
if (!dd->boardname)
return -ENOMEM;
}
return 0;
}
/**
* Allocate and initialize the device structure for the hfi.
* @dev: the pci_dev for hfi1_ib device
......@@ -10658,18 +10685,13 @@ struct hfi1_devdata *hfi1_init_dd(struct pci_dev *pdev,
parse_platform_config(dd);
/* add board names as they are defined */
dd->boardname = kmalloc(64, GFP_KERNEL);
if (!dd->boardname)
ret = obtain_boardname(dd);
if (ret)
goto bail_cleanup;
snprintf(dd->boardname, 64, "Board ID 0x%llx",
dd->revision >> CCE_REVISION_BOARD_ID_LOWER_NIBBLE_SHIFT
& CCE_REVISION_BOARD_ID_LOWER_NIBBLE_MASK);
snprintf(dd->boardversion, BOARD_VERS_MAX,
"ChipABI %u.%u, %s, ChipRev %u.%u, SW Compat %llu\n",
"ChipABI %u.%u, ChipRev %u.%u, SW Compat %llu\n",
HFI1_CHIP_VERS_MAJ, HFI1_CHIP_VERS_MIN,
dd->boardname,
(u32)dd->majrev,
(u32)dd->minrev,
(dd->revision >> CCE_REVISION_SW_SHIFT)
......
/*
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2015 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* Copyright(c) 2015 Intel Corporation.
*
* 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.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "efivar.h"
/* GUID for HFI1 variables in EFI */
#define HFI1_EFIVAR_GUID EFI_GUID(0xc50a953e, 0xa8b2, 0x42a6, \
0xbf, 0x89, 0xd3, 0x33, 0xa6, 0xe9, 0xe6, 0xd4)
/* largest EFI data size we expect */
#define EFI_DATA_SIZE 4096
/*
* Read the named EFI variable. Return the size of the actual data in *size
* and a kmalloc'ed buffer in *return_data. The caller must free the
* data. It is guaranteed that *return_data will be NULL and *size = 0
* if this routine fails.
*
* Return 0 on success, -errno on failure.
*/
static int read_efi_var(const char *name, unsigned long *size,
void **return_data)
{
efi_status_t status;
efi_char16_t *uni_name;
efi_guid_t guid;
unsigned long temp_size;
void *temp_buffer;
void *data;
int i;
int ret;
/* set failure return values */
*size = 0;
*return_data = NULL;
if (!efi_enabled(EFI_RUNTIME_SERVICES))
return -EOPNOTSUPP;
uni_name = kzalloc(sizeof(efi_char16_t) * (strlen(name) + 1),
GFP_KERNEL);
temp_buffer = kzalloc(EFI_DATA_SIZE, GFP_KERNEL);
if (!uni_name || !temp_buffer) {
ret = -ENOMEM;
goto fail;
}
/* input: the size of the buffer */
temp_size = EFI_DATA_SIZE;
/* convert ASCII to unicode - it is a 1:1 mapping */
for (i = 0; name[i]; i++)
uni_name[i] = name[i];
/* need a variable for our GUID */
guid = HFI1_EFIVAR_GUID;
/* call into EFI runtime services */
status = efi.get_variable(
uni_name,
&guid,
NULL,
&temp_size,
temp_buffer);
/*
* It would be nice to call efi_status_to_err() here, but that
* is in the EFIVAR_FS code and may not be compiled in.
* However, even that is insufficient since it does not cover
* EFI_BUFFER_TOO_SMALL which could be an important return.
* For now, just split out succces or not found.
*/
ret = status == EFI_SUCCESS ? 0 :
status == EFI_NOT_FOUND ? -ENOENT :
-EINVAL;
if (ret)
goto fail;
/*
* We have successfully read the EFI variable into our
* temporary buffer. Now allocate a correctly sized
* buffer.
*/
data = kmalloc(temp_size, GFP_KERNEL);
if (!data) {
ret = -ENOMEM;
goto fail;
}
memcpy(data, temp_buffer, temp_size);
*size = temp_size;
*return_data = data;
fail:
kfree(uni_name);
kfree(temp_buffer);
return ret;
}
/*
* Read an HFI1 EFI variable of the form:
* <PCIe address>-<kind>
* Return an kalloc'ed array and size of the data.
*
* Returns 0 on success, -errno on failure.
*/
int read_hfi1_efi_var(struct hfi1_devdata *dd, const char *kind,
unsigned long *size, void **return_data)
{
char name[64];
/* create a common prefix */
snprintf(name, sizeof(name), "%04x:%02x:%02x.%x-%s",
pci_domain_nr(dd->pcidev->bus),
dd->pcidev->bus->number,
PCI_SLOT(dd->pcidev->devfn),
PCI_FUNC(dd->pcidev->devfn),
kind);
return read_efi_var(name, size, return_data);
}
/*
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2015 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* Copyright(c) 2015 Intel Corporation.
*
* 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.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef _HFI1_EFIVAR_H
#define _HFI1_EFIVAR_H
#include <linux/efi.h>
#include "hfi.h"
int read_hfi1_efi_var(struct hfi1_devdata *dd, const char *kind,
unsigned long *size, void **return_data);
#endif /* _HFI1_EFIVAR_H */
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