staging/rdma/hfi1: Read EFI variable for device description (5d9157aa) · Commits · 戴 / test

drivers/staging/rdma/hfi1/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -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

drivers/staging/rdma/hfi1/chip.c

+30 −8

Original line number	Diff line number	Diff line
		@@ -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)

drivers/staging/rdma/hfi1/efivar.c

0 → 100644

+169 −0

Original line number	Diff line number	Diff line
		/*
		*
		* 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);
		}

drivers/staging/rdma/hfi1/efivar.h

0 → 100644

+60 −0

Original line number	Diff line number	Diff line
		/*
		*
		* 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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