diff options
Diffstat (limited to 'drivers/staging/rdma/hfi1/efivar.c')
| -rw-r--r-- | drivers/staging/rdma/hfi1/efivar.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/drivers/staging/rdma/hfi1/efivar.c b/drivers/staging/rdma/hfi1/efivar.c deleted file mode 100644 index 106349fc1fb9..000000000000 --- a/drivers/staging/rdma/hfi1/efivar.c +++ /dev/null @@ -1,164 +0,0 @@ -/* - * Copyright(c) 2015, 2016 Intel Corporation. - * - * 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 - * - * 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 - * - * 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 = kcalloc(strlen(name) + 1, sizeof(efi_char16_t), 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 = kmemdup(temp_buffer, temp_size, GFP_KERNEL); - if (!data) { - ret = -ENOMEM; - goto fail; - } - - *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); -} |