mirror of https://gitee.com/openkylin/linux.git
115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
/*
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* Copyright (C) 2012 CERN (www.cern.ch)
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* Author: Alessandro Rubini <rubini@gnudd.com>
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*
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* Released according to the GNU GPL, version 2 or any later version.
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*
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* This work is part of the White Rabbit project, a research effort led
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* by CERN, the European Institute for Nuclear Research.
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/fmc.h>
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#include <linux/ipmi-fru.h>
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/* The fru parser is both user and kernel capable: it needs alloc */
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void *fru_alloc(size_t size)
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{
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return kzalloc(size, GFP_KERNEL);
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}
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/* The actual match function */
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int fmc_match(struct device *dev, struct device_driver *drv)
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{
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struct fmc_driver *fdrv = to_fmc_driver(drv);
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struct fmc_device *fdev = to_fmc_device(dev);
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struct fmc_fru_id *fid;
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int i, matched = 0;
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/* This currently only matches the EEPROM (FRU id) */
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fid = fdrv->id_table.fru_id;
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if (!fid) {
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dev_warn(&fdev->dev, "Driver has no ID: matches all\n");
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matched = 1;
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} else {
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if (!fdev->id.manufacturer || !fdev->id.product_name)
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return 0; /* the device has no FRU information */
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for (i = 0; i < fdrv->id_table.fru_id_nr; i++, fid++) {
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if (fid->manufacturer &&
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strcmp(fid->manufacturer, fdev->id.manufacturer))
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continue;
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if (fid->product_name &&
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strcmp(fid->product_name, fdev->id.product_name))
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continue;
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matched = 1;
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break;
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}
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}
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/* FIXME: match SDB contents */
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return matched;
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}
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/* This function creates ID info for a newly registered device */
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int fmc_fill_id_info(struct fmc_device *fmc)
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{
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struct fru_common_header *h;
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struct fru_board_info_area *bia;
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int ret, allocated = 0;
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/* If we know the eeprom length, try to read it off the device */
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if (fmc->eeprom_len && !fmc->eeprom) {
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fmc->eeprom = kzalloc(fmc->eeprom_len, GFP_KERNEL);
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if (!fmc->eeprom)
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return -ENOMEM;
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allocated = 1;
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ret = fmc_read_ee(fmc, 0, fmc->eeprom, fmc->eeprom_len);
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if (ret < 0)
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goto out;
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}
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/* If no eeprom, continue with other matches */
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if (!fmc->eeprom)
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return 0;
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dev_info(fmc->hwdev, "mezzanine %i\n", fmc->slot_id); /* header */
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/* So we have the eeprom: parse the FRU part (if any) */
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h = (void *)fmc->eeprom;
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if (h->format != 1) {
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pr_info(" EEPROM has no FRU information\n");
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goto out;
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}
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if (!fru_header_cksum_ok(h)) {
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pr_info(" FRU: wrong header checksum\n");
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goto out;
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}
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bia = fru_get_board_area(h);
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if (!fru_bia_cksum_ok(bia)) {
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pr_info(" FRU: wrong board area checksum\n");
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goto out;
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}
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fmc->id.manufacturer = fru_get_board_manufacturer(h);
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fmc->id.product_name = fru_get_product_name(h);
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pr_info(" Manufacturer: %s\n", fmc->id.manufacturer);
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pr_info(" Product name: %s\n", fmc->id.product_name);
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/* Create the short name (FIXME: look in sdb as well) */
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fmc->mezzanine_name = kstrdup(fmc->id.product_name, GFP_KERNEL);
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out:
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if (allocated) {
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kfree(fmc->eeprom);
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fmc->eeprom = NULL;
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}
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return 0; /* no error: let other identification work */
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}
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/* Some ID data is allocated using fru_alloc() above, so release it */
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void fmc_free_id_info(struct fmc_device *fmc)
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{
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kfree(fmc->mezzanine_name);
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kfree(fmc->id.manufacturer);
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kfree(fmc->id.product_name);
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}
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