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: Easwar Hariharan <easwar.hariharan@intel.com> Signed-off-by: Dean Luick <dean.luick@intel.com> Signed-off-by: Jubin John <jubin.john@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dean Luick
Greg Kroah-Hartman
parent
995deafaff
commit
5d9157aafb
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@ -7,7 +7,7 @@
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#
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obj-$(CONFIG_INFINIBAND_HFI1) += hfi1.o
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hfi1-y := chip.o cq.o device.o diag.o dma.o driver.o eprom.o file_ops.o firmware.o \
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hfi1-y := chip.o cq.o device.o diag.o dma.o driver.o efivar.o eprom.o file_ops.o firmware.o \
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init.o intr.o keys.o mad.o mmap.o mr.o pcie.o pio.o pio_copy.o \
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qp.o qsfp.o rc.o ruc.o sdma.o srq.o sysfs.o trace.o twsi.o \
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uc.o ud.o user_pages.o user_sdma.o verbs_mcast.o verbs.o
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@ -63,6 +63,7 @@
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#include "pio.h"
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#include "sdma.h"
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#include "eprom.h"
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#include "efivar.h"
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#define NUM_IB_PORTS 1
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@ -10461,6 +10462,32 @@ static void asic_should_init(struct hfi1_devdata *dd)
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spin_unlock_irqrestore(&hfi1_devs_lock, flags);
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}
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/*
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* Set dd->boardname. Use a generic name if a name is not returned from
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* EFI variable space.
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*
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* Return 0 on success, -ENOMEM if space could not be allocated.
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*/
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static int obtain_boardname(struct hfi1_devdata *dd)
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{
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/* generic board description */
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const char generic[] =
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"Intel Omni-Path Host Fabric Interface Adapter 100 Series";
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unsigned long size;
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int ret;
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ret = read_hfi1_efi_var(dd, "description", &size,
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(void **)&dd->boardname);
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if (ret) {
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dd_dev_err(dd, "Board description not found\n");
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/* use generic description */
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dd->boardname = kstrdup(generic, GFP_KERNEL);
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if (!dd->boardname)
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return -ENOMEM;
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}
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return 0;
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}
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/**
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* Allocate and initialize the device structure for the hfi.
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* @dev: the pci_dev for hfi1_ib device
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@ -10658,18 +10685,13 @@ struct hfi1_devdata *hfi1_init_dd(struct pci_dev *pdev,
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parse_platform_config(dd);
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/* add board names as they are defined */
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dd->boardname = kmalloc(64, GFP_KERNEL);
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if (!dd->boardname)
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ret = obtain_boardname(dd);
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if (ret)
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goto bail_cleanup;
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snprintf(dd->boardname, 64, "Board ID 0x%llx",
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dd->revision >> CCE_REVISION_BOARD_ID_LOWER_NIBBLE_SHIFT
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& CCE_REVISION_BOARD_ID_LOWER_NIBBLE_MASK);
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snprintf(dd->boardversion, BOARD_VERS_MAX,
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"ChipABI %u.%u, %s, ChipRev %u.%u, SW Compat %llu\n",
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"ChipABI %u.%u, ChipRev %u.%u, SW Compat %llu\n",
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HFI1_CHIP_VERS_MAJ, HFI1_CHIP_VERS_MIN,
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dd->boardname,
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(u32)dd->majrev,
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(u32)dd->minrev,
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(dd->revision >> CCE_REVISION_SW_SHIFT)
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@ -0,0 +1,169 @@
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/*
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2015 Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2015 Intel Corporation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "efivar.h"
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/* GUID for HFI1 variables in EFI */
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#define HFI1_EFIVAR_GUID EFI_GUID(0xc50a953e, 0xa8b2, 0x42a6, \
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0xbf, 0x89, 0xd3, 0x33, 0xa6, 0xe9, 0xe6, 0xd4)
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/* largest EFI data size we expect */
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#define EFI_DATA_SIZE 4096
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/*
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* Read the named EFI variable. Return the size of the actual data in *size
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* and a kmalloc'ed buffer in *return_data. The caller must free the
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* data. It is guaranteed that *return_data will be NULL and *size = 0
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* if this routine fails.
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*
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* Return 0 on success, -errno on failure.
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*/
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static int read_efi_var(const char *name, unsigned long *size,
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void **return_data)
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{
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efi_status_t status;
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efi_char16_t *uni_name;
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efi_guid_t guid;
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unsigned long temp_size;
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void *temp_buffer;
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void *data;
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int i;
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int ret;
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/* set failure return values */
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*size = 0;
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*return_data = NULL;
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if (!efi_enabled(EFI_RUNTIME_SERVICES))
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return -EOPNOTSUPP;
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uni_name = kzalloc(sizeof(efi_char16_t) * (strlen(name) + 1),
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GFP_KERNEL);
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temp_buffer = kzalloc(EFI_DATA_SIZE, GFP_KERNEL);
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if (!uni_name || !temp_buffer) {
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ret = -ENOMEM;
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goto fail;
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}
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/* input: the size of the buffer */
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temp_size = EFI_DATA_SIZE;
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/* convert ASCII to unicode - it is a 1:1 mapping */
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for (i = 0; name[i]; i++)
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uni_name[i] = name[i];
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/* need a variable for our GUID */
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guid = HFI1_EFIVAR_GUID;
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/* call into EFI runtime services */
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status = efi.get_variable(
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uni_name,
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&guid,
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NULL,
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&temp_size,
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temp_buffer);
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/*
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* It would be nice to call efi_status_to_err() here, but that
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* is in the EFIVAR_FS code and may not be compiled in.
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* However, even that is insufficient since it does not cover
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* EFI_BUFFER_TOO_SMALL which could be an important return.
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* For now, just split out succces or not found.
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*/
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ret = status == EFI_SUCCESS ? 0 :
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status == EFI_NOT_FOUND ? -ENOENT :
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-EINVAL;
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if (ret)
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goto fail;
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/*
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* We have successfully read the EFI variable into our
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* temporary buffer. Now allocate a correctly sized
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* buffer.
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*/
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data = kmalloc(temp_size, GFP_KERNEL);
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if (!data) {
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ret = -ENOMEM;
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goto fail;
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}
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memcpy(data, temp_buffer, temp_size);
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*size = temp_size;
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*return_data = data;
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fail:
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kfree(uni_name);
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kfree(temp_buffer);
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return ret;
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}
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/*
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* Read an HFI1 EFI variable of the form:
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* <PCIe address>-<kind>
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* Return an kalloc'ed array and size of the data.
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*
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* Returns 0 on success, -errno on failure.
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*/
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int read_hfi1_efi_var(struct hfi1_devdata *dd, const char *kind,
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unsigned long *size, void **return_data)
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{
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char name[64];
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/* create a common prefix */
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snprintf(name, sizeof(name), "%04x:%02x:%02x.%x-%s",
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pci_domain_nr(dd->pcidev->bus),
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dd->pcidev->bus->number,
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PCI_SLOT(dd->pcidev->devfn),
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PCI_FUNC(dd->pcidev->devfn),
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kind);
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return read_efi_var(name, size, return_data);
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}
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@ -0,0 +1,60 @@
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/*
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2015 Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2015 Intel Corporation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef _HFI1_EFIVAR_H
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#define _HFI1_EFIVAR_H
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#include <linux/efi.h>
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#include "hfi.h"
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int read_hfi1_efi_var(struct hfi1_devdata *dd, const char *kind,
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unsigned long *size, void **return_data);
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#endif /* _HFI1_EFIVAR_H */
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