diff options
Diffstat (limited to 'drivers/block/rsxx/config.c')
| -rw-r--r-- | drivers/block/rsxx/config.c | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/drivers/block/rsxx/config.c b/drivers/block/rsxx/config.c deleted file mode 100644 index 11ed1d9646b9..000000000000 --- a/drivers/block/rsxx/config.c +++ /dev/null @@ -1,197 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* -* Filename: config.c -* -* Authors: Joshua Morris <josh.h.morris@us.ibm.com> -* Philip Kelleher <pjk1939@linux.vnet.ibm.com> -* -* (C) Copyright 2013 IBM Corporation -*/ - -#include <linux/types.h> -#include <linux/crc32.h> -#include <linux/swab.h> - -#include "rsxx_priv.h" -#include "rsxx_cfg.h" - -static void initialize_config(struct rsxx_card_cfg *cfg) -{ - cfg->hdr.version = RSXX_CFG_VERSION; - - cfg->data.block_size = RSXX_HW_BLK_SIZE; - cfg->data.stripe_size = RSXX_HW_BLK_SIZE; - cfg->data.vendor_id = RSXX_VENDOR_ID_IBM; - cfg->data.cache_order = (-1); - cfg->data.intr_coal.mode = RSXX_INTR_COAL_DISABLED; - cfg->data.intr_coal.count = 0; - cfg->data.intr_coal.latency = 0; -} - -static u32 config_data_crc32(struct rsxx_card_cfg *cfg) -{ - /* - * Return the compliment of the CRC to ensure compatibility - * (i.e. this is how early rsxx drivers did it.) - */ - - return ~crc32(~0, &cfg->data, sizeof(cfg->data)); -} - - -/*----------------- Config Byte Swap Functions -------------------*/ -static void config_hdr_be_to_cpu(struct card_cfg_hdr *hdr) -{ - hdr->version = be32_to_cpu((__force __be32) hdr->version); - hdr->crc = be32_to_cpu((__force __be32) hdr->crc); -} - -static void config_hdr_cpu_to_be(struct card_cfg_hdr *hdr) -{ - hdr->version = (__force u32) cpu_to_be32(hdr->version); - hdr->crc = (__force u32) cpu_to_be32(hdr->crc); -} - -static void config_data_swab(struct rsxx_card_cfg *cfg) -{ - u32 *data = (u32 *) &cfg->data; - int i; - - for (i = 0; i < (sizeof(cfg->data) / 4); i++) - data[i] = swab32(data[i]); -} - -static void config_data_le_to_cpu(struct rsxx_card_cfg *cfg) -{ - u32 *data = (u32 *) &cfg->data; - int i; - - for (i = 0; i < (sizeof(cfg->data) / 4); i++) - data[i] = le32_to_cpu((__force __le32) data[i]); -} - -static void config_data_cpu_to_le(struct rsxx_card_cfg *cfg) -{ - u32 *data = (u32 *) &cfg->data; - int i; - - for (i = 0; i < (sizeof(cfg->data) / 4); i++) - data[i] = (__force u32) cpu_to_le32(data[i]); -} - - -/*----------------- Config Operations ------------------*/ -static int rsxx_save_config(struct rsxx_cardinfo *card) -{ - struct rsxx_card_cfg cfg; - int st; - - memcpy(&cfg, &card->config, sizeof(cfg)); - - if (unlikely(cfg.hdr.version != RSXX_CFG_VERSION)) { - dev_err(CARD_TO_DEV(card), - "Cannot save config with invalid version %d\n", - cfg.hdr.version); - return -EINVAL; - } - - /* Convert data to little endian for the CRC calculation. */ - config_data_cpu_to_le(&cfg); - - cfg.hdr.crc = config_data_crc32(&cfg); - - /* - * Swap the data from little endian to big endian so it can be - * stored. - */ - config_data_swab(&cfg); - config_hdr_cpu_to_be(&cfg.hdr); - - st = rsxx_creg_write(card, CREG_ADD_CONFIG, sizeof(cfg), &cfg, 1); - if (st) - return st; - - return 0; -} - -int rsxx_load_config(struct rsxx_cardinfo *card) -{ - int st; - u32 crc; - - st = rsxx_creg_read(card, CREG_ADD_CONFIG, sizeof(card->config), - &card->config, 1); - if (st) { - dev_err(CARD_TO_DEV(card), - "Failed reading card config.\n"); - return st; - } - - config_hdr_be_to_cpu(&card->config.hdr); - - if (card->config.hdr.version == RSXX_CFG_VERSION) { - /* - * We calculate the CRC with the data in little endian, because - * early drivers did not take big endian CPUs into account. - * The data is always stored in big endian, so we need to byte - * swap it before calculating the CRC. - */ - - config_data_swab(&card->config); - - /* Check the CRC */ - crc = config_data_crc32(&card->config); - if (crc != card->config.hdr.crc) { - dev_err(CARD_TO_DEV(card), - "Config corruption detected!\n"); - dev_info(CARD_TO_DEV(card), - "CRC (sb x%08x is x%08x)\n", - card->config.hdr.crc, crc); - return -EIO; - } - - /* Convert the data to CPU byteorder */ - config_data_le_to_cpu(&card->config); - - } else if (card->config.hdr.version != 0) { - dev_err(CARD_TO_DEV(card), - "Invalid config version %d.\n", - card->config.hdr.version); - /* - * Config version changes require special handling from the - * user - */ - return -EINVAL; - } else { - dev_info(CARD_TO_DEV(card), - "Initializing card configuration.\n"); - initialize_config(&card->config); - st = rsxx_save_config(card); - if (st) - return st; - } - - card->config_valid = 1; - - dev_dbg(CARD_TO_DEV(card), "version: x%08x\n", - card->config.hdr.version); - dev_dbg(CARD_TO_DEV(card), "crc: x%08x\n", - card->config.hdr.crc); - dev_dbg(CARD_TO_DEV(card), "block_size: x%08x\n", - card->config.data.block_size); - dev_dbg(CARD_TO_DEV(card), "stripe_size: x%08x\n", - card->config.data.stripe_size); - dev_dbg(CARD_TO_DEV(card), "vendor_id: x%08x\n", - card->config.data.vendor_id); - dev_dbg(CARD_TO_DEV(card), "cache_order: x%08x\n", - card->config.data.cache_order); - dev_dbg(CARD_TO_DEV(card), "mode: x%08x\n", - card->config.data.intr_coal.mode); - dev_dbg(CARD_TO_DEV(card), "count: x%08x\n", - card->config.data.intr_coal.count); - dev_dbg(CARD_TO_DEV(card), "latency: x%08x\n", - card->config.data.intr_coal.latency); - - return 0; -} - |