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client-ip=63.163.107.173; helo=milsmgep12.sandisk.com; Authentication-Results: spf=pass (sender IP is 63.163.107.173) smtp.mailfrom=Avi.Shchislowski@sandisk.com; X-Exchange-Antispam-Report-CFA: BCL:0;PCL:0;RULEID:;SRVR:BY2PR02MB121; X-OriginatorOrg: sandisk.com Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add support of FFU for eMMC v5.0 Signed-off-by: Avi Shchislowski diff --git a/drivers/mmc/card/Kconfig b/drivers/mmc/card/Kconfig index 5562308..19ba729 100644 --- a/drivers/mmc/card/Kconfig +++ b/drivers/mmc/card/Kconfig @@ -68,3 +68,11 @@ config MMC_TEST This driver is only of interest to those developing or testing a host driver. Most people should say N here. + +config MMC_FFU + bool "FFU SUPPORT" + depends on MMC != n + help + This is an option to run firmware update on eMMC 5.0. + Field firmware updates (FFU) enables features enhancment + in the field. diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index ede41f0..68997f2 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -480,6 +480,11 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev, goto cmd_done; } + if (idata->ic.opcode == MMC_FFU_INVOKE_OP) { + err = mmc_ffu_invoke(card, idata->buf); + goto cmd_done; + } + cmd.opcode = idata->ic.opcode; cmd.arg = idata->ic.arg; cmd.flags = idata->ic.flags; diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile index 38ed210..f2fdfd4 100644 --- a/drivers/mmc/core/Makefile +++ b/drivers/mmc/core/Makefile @@ -10,3 +10,4 @@ mmc_core-y := core.o bus.o host.o \ quirks.o slot-gpio.o mmc_core-$(CONFIG_DEBUG_FS) += debugfs.o +obj-$(CONFIG_MMC_FFU) += mmc_ffu.o diff --git a/drivers/mmc/core/mmc_ffu.c b/drivers/mmc/core/mmc_ffu.c new file mode 100644 index 0000000..817a58d --- /dev/null +++ b/drivers/mmc/core/mmc_ffu.c @@ -0,0 +1,487 @@ +/* + * * ffu.c + * + * Copyright 2007-2008 Pierre Ossman + * + * Modified by SanDisk Corp., Copyright © 2013 SanDisk Corp. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program includes bug.h, card.h, host.h, mmc.h, scatterlist.h, + * slab.h, ffu.h & swap.h header files + * The original, unmodified version of this program – the mmc_test.c + * file – is obtained under the GPL v2.0 license that is available via + * http://www.gnu.org/licenses/, + * or http://www.opensource.org/licenses/gpl-2.0.php +*/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/** + * struct mmc_ffu_pages - pages allocated by 'alloc_pages()'. + * @page: first page in the allocation + * @order: order of the number of pages allocated + */ +struct mmc_ffu_pages { + struct page *page; + unsigned int order; +}; + +/** + * struct mmc_ffu_mem - allocated memory. + * @arr: array of allocations + * @cnt: number of allocations + */ +struct mmc_ffu_mem { + struct mmc_ffu_pages *arr; + unsigned int cnt; +}; + +struct mmc_ffu_area { + unsigned long max_sz; + unsigned int max_tfr; + unsigned int max_segs; + unsigned int max_seg_sz; + unsigned int blocks; + unsigned int sg_len; + struct mmc_ffu_mem mem; + struct sg_table sgtable; +}; + +/* + * Map memory into a scatterlist. + */ +static unsigned int mmc_ffu_map_sg(struct mmc_ffu_mem *mem, int size, + struct scatterlist *sglist) +{ + struct scatterlist *sg = sglist; + unsigned int i; + unsigned long sz = size; + unsigned int sctr_len = 0; + unsigned long len; + + for (i = 0; i < mem->cnt && sz; i++, sz -= len) { + len = PAGE_SIZE << mem->arr[i].order; + + if (len > sz) { + len = sz; + sz = 0; + } + + sg_set_page(sg, mem->arr[i].page, len, 0); + sg = sg_next(sg); + sctr_len++; + } + + return sctr_len; +} + +static void mmc_ffu_free_mem(struct mmc_ffu_mem *mem) +{ + if (!mem) + return; + + while (mem->cnt--) + __free_pages(mem->arr[mem->cnt].page, mem->arr[mem->cnt].order); + + kfree(mem->arr); +} + +/* + * Cleanup struct mmc_ffu_area. + */ +static int mmc_ffu_area_cleanup(struct mmc_ffu_area *area) +{ + sg_free_table(&area->sgtable); + mmc_ffu_free_mem(&area->mem); + return 0; +} + +/* + * Allocate a lot of memory, preferably max_sz but at least min_sz. In case + * there isn't much memory do not exceed 1/16th total low mem pages. Also do + * not exceed a maximum number of segments and try not to make segments much + * bigger than maximum segment size. + */ +static int mmc_ffu_alloc_mem(struct mmc_ffu_area *area, unsigned long min_sz) +{ + unsigned long max_page_cnt = DIV_ROUND_UP(area->max_tfr, PAGE_SIZE); + unsigned long min_page_cnt = DIV_ROUND_UP(min_sz, PAGE_SIZE); + unsigned long max_seg_page_cnt = + DIV_ROUND_UP(area->max_seg_sz, PAGE_SIZE); + unsigned long page_cnt = 0; + /* we divide by 16 to ensure we will not allocate a big amount + * of unnecessary pages */ + unsigned long limit = nr_free_buffer_pages() >> 4; + + gfp_t flags = GFP_KERNEL | GFP_DMA | __GFP_NOWARN | __GFP_NORETRY; + + if (max_page_cnt > limit) { + max_page_cnt = limit; + area->max_tfr = max_page_cnt * PAGE_SIZE; + } + + if (min_page_cnt > max_page_cnt) + min_page_cnt = max_page_cnt; + + if (area->max_segs * max_seg_page_cnt > max_page_cnt) + area->max_segs = DIV_ROUND_UP(max_page_cnt, max_seg_page_cnt); + + area->mem.arr = kzalloc(sizeof(struct mmc_ffu_pages) * area->max_segs, + GFP_KERNEL); + area->mem.cnt = 0; + if (!area->mem.arr) + goto out_free; + + while (max_page_cnt) { + struct page *page; + unsigned int order; + + order = get_order(max_seg_page_cnt << PAGE_SHIFT); + + do { + page = alloc_pages(flags, order); + } while (!page && order--); + + if (!page) + goto out_free; + + area->mem.arr[area->mem.cnt].page = page; + area->mem.arr[area->mem.cnt].order = order; + area->mem.cnt++; + page_cnt += 1UL << order; + if (max_page_cnt <= (1UL << order)) + break; + max_page_cnt -= 1UL << order; + } + + if (page_cnt < min_page_cnt) + goto out_free; + + return 0; + +out_free: + mmc_ffu_free_mem(&area->mem); + return -ENOMEM; +} + +/* + * Initialize an area for data transfers. + * Copy the data to the allocated pages. + */ +static int mmc_ffu_area_init(struct mmc_ffu_area *area, struct mmc_card *card, + const u8 *data) +{ + int ret; + int i; + unsigned int length = 0, page_length; + + ret = mmc_ffu_alloc_mem(area, 1); + for (i = 0; i < area->mem.cnt; i++) { + if (length > area->max_tfr) { + ret = -EINVAL; + goto out_free; + } + page_length = PAGE_SIZE << area->mem.arr[i].order; + memcpy(page_address(area->mem.arr[i].page), data + length, + min(area->max_tfr - length, page_length)); + length += page_length; + } + + ret = sg_alloc_table(&area->sgtable, area->mem.cnt, GFP_KERNEL); + if (ret) + goto out_free; + + area->sg_len = mmc_ffu_map_sg(&area->mem, area->max_tfr, + area->sgtable.sgl); + + + return 0; + +out_free: + mmc_ffu_free_mem(&area->mem); + return ret; +} + +static int mmc_ffu_write(struct mmc_card *card, const u8 *src, u32 arg, + int size) +{ + int rc; + struct mmc_ffu_area area = {0}; + int block_size = card->ext_csd.data_sector_size; + + area.max_segs = card->host->max_segs; + area.max_seg_sz = card->host->max_seg_size & ~(block_size - 1); + + do { + area.max_tfr = size; + if (area.max_tfr >> 9 > card->host->max_blk_count) + area.max_tfr = card->host->max_blk_count << 9; + if (area.max_tfr > card->host->max_req_size) + area.max_tfr = card->host->max_req_size; + if (DIV_ROUND_UP(area.max_tfr, area.max_seg_sz) > area.max_segs) + area.max_tfr = area.max_segs * area.max_seg_sz; + + rc = mmc_ffu_area_init(&area, card, src); + if (rc != 0) + goto exit; + + rc = mmc_simple_transfer(card, area.sgtable.sgl, area.sg_len, + arg, area.max_tfr / block_size, block_size, 1); + mmc_ffu_area_cleanup(&area); + if (rc != 0) { + pr_err("%s mmc_ffu_simple_transfer %d\n", __func__, rc); + goto exit; + } + src += area.max_tfr; + size -= area.max_tfr; + + } while (size > 0); + +exit: + return rc; +} + +/* Flush all scheduled work from the MMC work queue. + * and initialize the MMC device */ +static int mmc_ffu_restart(struct mmc_card *card) +{ + struct mmc_host *host = card->host; + int err = 0; + + err = mmc_power_save_host(host); + if (err) { + pr_warn("%s: going to sleep failed (%d)!!!\n", + __func__ , err); + goto exit; + } + + err = mmc_power_restore_host(host); + +exit: + + return err; +} + +static int mmc_ffu_switch_mode(struct mmc_card *card , int mode) +{ + int err = 0; + int offset; + + switch (mode) { + case MMC_FFU_MODE_SET: + case MMC_FFU_MODE_NORMAL: + offset = EXT_CSD_MODE_CONFIG; + break; + case MMC_FFU_INSTALL_SET: + offset = EXT_CSD_MODE_OPERATION_CODES; + mode = 0x1; + break; + default: + err = -EINVAL; + break; + } + + if (err == 0) { + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + offset, mode, + card->ext_csd.generic_cmd6_time); + } + + return err; +} + +static int mmc_ffu_install(struct mmc_card *card, u8 *ext_csd) +{ + int err; + u32 timeout; + + /* check mode operation */ + if (!card->ext_csd.ffu_mode_op) { + /* host switch back to work in normal MMC Read/Write commands */ + err = mmc_ffu_switch_mode(card, MMC_FFU_MODE_NORMAL); + if (err) { + pr_err("FFU: %s: switch to normal mode error %d:\n", + mmc_hostname(card->host), err); + return err; + } + + /* restart the eMMC */ + err = mmc_ffu_restart(card); + if (err) { + pr_err("FFU: %s: install error %d:\n", + mmc_hostname(card->host), err); + return err; + } + } else { + timeout = ext_csd[EXT_CSD_OPERATION_CODE_TIMEOUT]; + if (timeout == 0 || timeout > 0x17) { + timeout = 0x17; + pr_warn("FFU: %s: operation code timeout is out " + "of range. Using maximum timeout.\n", + mmc_hostname(card->host)); + } + + /* timeout is at millisecond resolution */ + timeout = DIV_ROUND_UP((100 * (1 << timeout)), 1000); + + /* set ext_csd to install mode */ + err = mmc_ffu_switch_mode(card, MMC_FFU_INSTALL_SET); + if (err) { + pr_err("FFU: %s: error %d setting install mode\n", + mmc_hostname(card->host), err); + return err; + } + } + + /* read ext_csd */ + err = mmc_send_ext_csd(card, ext_csd); + if (err) { + pr_err("FFU: %s: error %d sending ext_csd\n", + mmc_hostname(card->host), err); + return err; + } + + /* return status */ + err = ext_csd[EXT_CSD_FFU_STATUS]; + if (err) { + pr_err("FFU: %s: error %d FFU install:\n", + mmc_hostname(card->host), err); + return -EINVAL; + } + + return 0; +} + +int mmc_ffu_invoke(struct mmc_card *card, const char *name) +{ + u8 ext_csd[512]; + int err; + u32 arg; + u32 fw_prog_bytes; + const struct firmware *fw; + int block_size = card->ext_csd.data_sector_size; + + /* Check if FFU is supported */ + if (!card->ext_csd.ffu_capable) { + pr_err("FFU: %s: error FFU is not supported %d rev %d\n", + mmc_hostname(card->host), card->ext_csd.ffu_capable, + card->ext_csd.rev); + return -EOPNOTSUPP; + } + + if (strlen(name) > 512) { + pr_err("FFU: %s: %.20s is not a valid argument\n", + mmc_hostname(card->host), name); + return -EINVAL; + } + + /* setup FW data buffer */ + err = request_firmware(&fw, name, &card->dev); + if (err) { + pr_err("FFU: %s: Firmware request failed %d\n", + mmc_hostname(card->host), err); + return err; + } + if ((fw->size % block_size)) { + pr_warn("FFU: %s: Warning %zd firmware data size " + "is not aligned!!!\n", mmc_hostname(card->host), + fw->size); + } + + mmc_get_card(card); + + /* trigger flushing*/ + err = mmc_flush_cache(card); + if (err) { + pr_err("FFU: %s: error %d flushing data\n", + mmc_hostname(card->host), err); + goto exit; + } + + /* Read the EXT_CSD */ + err = mmc_send_ext_csd(card, ext_csd); + if (err) { + pr_err("FFU: %s: error %d sending ext_csd\n", + mmc_hostname(card->host), err); + goto exit; + } + + /* set CMD ARG */ + arg = ext_csd[EXT_CSD_FFU_ARG] | + ext_csd[EXT_CSD_FFU_ARG + 1] << 8 | + ext_csd[EXT_CSD_FFU_ARG + 2] << 16 | + ext_csd[EXT_CSD_FFU_ARG + 3] << 24; + + /* set device to FFU mode */ + err = mmc_ffu_switch_mode(card, MMC_FFU_MODE_SET); + if (err) { + pr_err("FFU: %s: error %d FFU is not supported\n", + mmc_hostname(card->host), err); + goto exit; + } + + err = mmc_ffu_write(card, fw->data, arg, fw->size); + if (err) { + pr_err("FFU: %s: write error %d\n", + mmc_hostname(card->host), err); + goto exit; + } + /* payload will be checked only in op_mode supported */ + if (card->ext_csd.ffu_mode_op) { + /* Read the EXT_CSD */ + err = mmc_send_ext_csd(card, ext_csd); + if (err) { + pr_err("FFU: %s: error %d sending ext_csd\n", + mmc_hostname(card->host), err); + goto exit; + } + + /* check that the eMMC has received the payload */ + fw_prog_bytes = ext_csd[EXT_CSD_NUM_OF_FW_SEC_PROG] | + ext_csd[EXT_CSD_NUM_OF_FW_SEC_PROG + 1] << 8 | + ext_csd[EXT_CSD_NUM_OF_FW_SEC_PROG + 2] << 16 | + ext_csd[EXT_CSD_NUM_OF_FW_SEC_PROG + 3] << 24; + + /* convert sectors to bytes: multiply by -512B or 4KB as + required by the card */ + fw_prog_bytes *= + block_size << (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] * 3); + if (fw_prog_bytes != fw->size) { + err = -EINVAL; + pr_err("FFU: %s: error %d number of programmed fw sector " + "incorrect %d %zd\n", __func__, err, + fw_prog_bytes, fw->size); + goto exit; + } + } + + err = mmc_ffu_install(card, ext_csd); + if (err) { + pr_err("FFU: %s: error firmware install %d\n", + mmc_hostname(card->host), err); + goto exit; + } + +exit: + if (err != 0) { + /* host switch back to work in normal MMC + * Read/Write commands */ + mmc_ffu_switch_mode(card, MMC_FFU_MODE_NORMAL); + } + release_firmware(fw); + mmc_put_card(card); + return err; +} +EXPORT_SYMBOL(mmc_ffu_invoke); diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index 92540d0..44fea6d 100644 --- a/include/linux/mmc/core.h +++ b/include/linux/mmc/core.h @@ -220,4 +220,26 @@ struct device_node; extern u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max); extern int mmc_of_parse_voltage(struct device_node *np, u32 *mask); +/* + * eMMC5.0 Field Firmware Update (FFU) opcodes +*/ +#define MMC_FFU_INVOKE_OP 302 + +#define MMC_FFU_MODE_SET 0x1 +#define MMC_FFU_MODE_NORMAL 0x0 +#define MMC_FFU_INSTALL_SET 0x2 + +#ifdef CONFIG_MMC_FFU +#define MMC_FFU_FEATURES 0x1 +#define FFU_FEATURES(ffu_features) (ffu_features & MMC_FFU_FEATURES) + +int mmc_ffu_invoke(struct mmc_card *card, const char *name); + +#else +static inline int mmc_ffu_invoke(struct mmc_card *card, const char *name) +{ + return -ENOSYS; +} +#endif + #endif /* LINUX_MMC_CORE_H */