diff options
| -rw-r--r-- | drivers/staging/rdma/hfi1/Makefile | 2 | ||||
| -rw-r--r-- | drivers/staging/rdma/hfi1/chip.c | 38 | ||||
| -rw-r--r-- | drivers/staging/rdma/hfi1/efivar.c | 169 | ||||
| -rw-r--r-- | drivers/staging/rdma/hfi1/efivar.h | 60 |
4 files changed, 260 insertions, 9 deletions
diff --git a/drivers/staging/rdma/hfi1/Makefile b/drivers/staging/rdma/hfi1/Makefile index 2e5daa6cdcc2..68c5a315e557 100644 --- a/drivers/staging/rdma/hfi1/Makefile +++ b/drivers/staging/rdma/hfi1/Makefile @@ -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 diff --git a/drivers/staging/rdma/hfi1/chip.c b/drivers/staging/rdma/hfi1/chip.c index 3235324659ba..bcbd831d2b73 100644 --- a/drivers/staging/rdma/hfi1/chip.c +++ b/drivers/staging/rdma/hfi1/chip.c @@ -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) diff --git a/drivers/staging/rdma/hfi1/efivar.c b/drivers/staging/rdma/hfi1/efivar.c new file mode 100644 index 000000000000..7dc5bae220e0 --- /dev/null +++ b/drivers/staging/rdma/hfi1/efivar.c @@ -0,0 +1,169 @@ +/* + * + * 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); +} diff --git a/drivers/staging/rdma/hfi1/efivar.h b/drivers/staging/rdma/hfi1/efivar.h new file mode 100644 index 000000000000..070706225c51 --- /dev/null +++ b/drivers/staging/rdma/hfi1/efivar.h @@ -0,0 +1,60 @@ +/* + * + * 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 */ |