From patchwork Tue Oct 25 20:06:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Loehle X-Patchwork-Id: 13019837 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DB657C38A2D for ; Tue, 25 Oct 2022 20:06:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231889AbiJYUGs convert rfc822-to-8bit (ORCPT ); Tue, 25 Oct 2022 16:06:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36934 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232296AbiJYUGc (ORCPT ); Tue, 25 Oct 2022 16:06:32 -0400 Received: from mail4.swissbit.com (mail4.swissbit.com [176.95.1.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 78C028E78C for ; Tue, 25 Oct 2022 13:06:22 -0700 (PDT) Received: from mail4.swissbit.com (localhost [127.0.0.1]) by DDEI (Postfix) with ESMTP id 76BA3123232; Tue, 25 Oct 2022 22:06:20 +0200 (CEST) Received: from mail4.swissbit.com (localhost [127.0.0.1]) by DDEI (Postfix) with ESMTP id 6551E121757; Tue, 25 Oct 2022 22:06:20 +0200 (CEST) X-TM-AS-ERS: 10.149.2.42-127.5.254.253 X-TM-AS-SMTP: 1.0 ZXguc3dpc3NiaXQuY29t Y2xvZWhsZUBoeXBlcnN0b25lLmNvbQ== X-DDEI-TLS-USAGE: Used Received: from ex.swissbit.com (unknown [10.149.2.42]) by mail4.swissbit.com (Postfix) with ESMTPS; Tue, 25 Oct 2022 22:06:20 +0200 (CEST) Received: from sbdeex04.sbitdom.lan (10.149.2.42) by sbdeex04.sbitdom.lan (10.149.2.42) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.9; Tue, 25 Oct 2022 22:06:17 +0200 Received: from sbdeex04.sbitdom.lan ([fe80::2047:4968:b5a0:1818]) by sbdeex04.sbitdom.lan ([fe80::2047:4968:b5a0:1818%9]) with mapi id 15.02.1118.009; Tue, 25 Oct 2022 22:06:17 +0200 From: =?iso-8859-1?q?Christian_L=F6hle?= To: Avri Altman , "ulf.hansson@linaro.org" , "linux-mmc@vger.kernel.org" Subject: [PATCHv2] mmc-utils: Implement alternative boot operation Thread-Topic: [PATCHv2] mmc-utils: Implement alternative boot operation Thread-Index: AdjorSj2mV2UKSdoTC2L2EHef1IaSw== Date: Tue, 25 Oct 2022 20:06:17 +0000 Message-ID: <660600d1ad5949cea4fc3088a16af634@hyperstone.com> Accept-Language: en-US, de-DE Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.242.2.4] MIME-Version: 1.0 X-TMASE-Version: DDEI-5.1-9.0.1002-27224.002 X-TMASE-Result: 10--2.609800-10.000000 X-TMASE-MatchedRID: 3FtKTYP2XG69nTq7rJdwXKekGZXOwUBuUrr7Qc5WhKjAuQ0xDMaXkHU3 oKSu0J1xNSFfuqIh1JvqUcYGFyyGoh2P280ZiGmR8IK7yRWPRNHvQYvK/M6DTEPRcdZ0KZk85ax aw7fIL5FiB2oMyVSusRG4NzbAK+G2WcA4Y6culFYdahq+rGDn//NkoMDX+kiul8eCd8viB1TToh hY3qi5AnMWeasl9UKPJcenWlfqR84pQD5WvouNbAzrPeIO/OIHWvaFnGMIvOoN5akFdO6oE6DPO zUU2kRcO86QWMLQuI2qGUQlpKNhkCQYLRCMVJ+BRcGHEV0WBxAMC36f0l7qKZwsUqEjZnPr0c8a NDRHFani8zVgXoAltnS4vQrt84k3IAcCikR3vq/N36QvK2BN9+yOWo2Tgbn48SLMYNclF4OH1tk FaQ8s63HBBaRYleLH X-TMASE-SNAP-Result: 1.821001.0001-0-1-22:0,33:0,34:0-0 X-TMASE-INERTIA: 0-0;;;; X-TMASE-XGENCLOUD: 6d083984-f9d0-4fd2-ace5-38698f537c9b-0-0-200-0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Implements the alternative boot operation for eMMCs. Note the limitations of the help. This is mostly useful for testing purposes if you set up the boot partition configuration correctly. Usage: $ sudo dd if=/dev/mmcblk2boot0 of=bootdatammcblk count=2 2+0 records in 2+0 records out 1024 bytes (1.0 kB, 1.0 KiB) copied, 0.00482308 s, 212 kB/s $ sudo ./mmc boot_operation bootdata /dev/mmcblk2 $ diff -s bootdata bootdatammcblk Files bootdata and bootdatammcblk are identical Signed-off-by: Christian Loehle Reviewed-by: Avri Altman --- -v2: Frees, closes, removal of boot_blocks parameter and boot ack check mmc.c | 12 +++++++ mmc.h | 3 ++ mmc_cmds.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ mmc_cmds.h | 1 + 4 files changed, 115 insertions(+) diff --git a/mmc.c b/mmc.c index 170ee39..adcd814 100644 --- a/mmc.c +++ b/mmc.c @@ -255,6 +255,18 @@ static struct Command commands[] = { "Issues a CMD0 GO_PRE_IDLE", NULL }, + { do_alt_boot_op, -1, + "boot_operation", " \n" + "Does the alternative boot operation and writes the specified starting blocks of boot data into the requested file.\n\n" + "Note some limitations\n:" + "1. The boot operation must be configured, e.g. for legacy speed:\n" + "mmc-utils bootbus set single_backward retain x8 /dev/mmcblk2\n" + "mmc-utils bootpart enable 1 0 /dev/mmcblk2\n" + "2. The MMC must currently be running at the bus mode that is configured for the boot operation (HS200 and HS400 not supported at all).\n" + "3. Only up to 512K bytes of boot data will be transferred.\n" + "4. The MMC will perform a soft reset, if your system cannot handle that do not use the boot operation from mmc-utils.\n", + NULL + }, { 0, 0, 0, 0 } }; diff --git a/mmc.h b/mmc.h index 6511dbc..4de0aae 100644 --- a/mmc.h +++ b/mmc.h @@ -24,6 +24,7 @@ #define MMC_GO_IDLE_STATE 0 /* bc */ #define MMC_GO_IDLE_STATE_ARG 0x0 #define MMC_GO_PRE_IDLE_STATE_ARG 0xF0F0F0F0 +#define MMC_BOOT_INITIATION_ARG 0xFFFFFFFA #define MMC_SWITCH 6 /* ac [31:0] See below R1b */ #define MMC_SEND_EXT_CSD 8 /* adtc R1 */ #define MMC_SEND_STATUS 13 /* ac [31:16] RCA R1 */ @@ -97,6 +98,7 @@ #define EXT_CSD_CACHE_SIZE_0 249 #define EXT_CSD_SEC_FEATURE_SUPPORT 231 #define EXT_CSD_BOOT_INFO 228 /* R/W */ +#define EXT_CSD_BOOT_MULT 226 /* RO */ #define EXT_CSD_HC_ERASE_GRP_SIZE 224 #define EXT_CSD_HC_WP_GRP_SIZE 221 #define EXT_CSD_SEC_COUNT_3 215 @@ -107,6 +109,7 @@ #define EXT_CSD_REV 192 #define EXT_CSD_BOOT_CFG 179 #define EXT_CSD_PART_CONFIG 179 +#define EXT_CSD_PART_CONFIG_BOOT_ACK (1 << 6) #define EXT_CSD_BOOT_BUS_CONDITIONS 177 #define EXT_CSD_ERASE_GROUP_DEF 175 #define EXT_CSD_BOOT_WP_STATUS 174 diff --git a/mmc_cmds.c b/mmc_cmds.c index 3db17e1..b7efe5a 100644 --- a/mmc_cmds.c +++ b/mmc_cmds.c @@ -3101,3 +3101,102 @@ int do_preidle(int nargs, char **argv) return 0; } + +int do_alt_boot_op(int nargs, char **argv) +{ + int fd, ret, boot_data_fd; + char *device, *boot_data_file; + struct mmc_ioc_multi_cmd *mioc; + __u8 ext_csd[512]; + __u8 *boot_buf; + unsigned int boot_blocks, ext_csd_boot_size; + + if (nargs != 3) { + fprintf(stderr, "Usage: mmc boot_op \n"); + exit(1); + } + boot_data_file = argv[1]; + device = argv[2]; + + fd = open(device, O_RDWR); + if (fd < 0) { + perror("open device"); + exit(1); + } + + ret = read_extcsd(fd, ext_csd); + if (ret) { + perror("read extcsd"); + goto dev_fd_close; + } + if ((ext_csd[EXT_CSD_PART_CONFIG] & EXT_CSD_PART_CONFIG_BOOT_ACK) + == EXT_CSD_PART_CONFIG_BOOT_ACK) { + perror("Boot Ack must not be enabled"); + ret = -EINVAL; + goto dev_fd_close; + } + ext_csd_boot_size = ext_csd[EXT_CSD_BOOT_MULT] * 128 * 1024; + boot_blocks = ext_csd_boot_size / 512; + if (ext_csd_boot_size > MMC_IOC_MAX_BYTES) { + printf("Boot partition size is bigger than IOCTL limit, limiting to 512K\n"); + boot_blocks = MMC_IOC_MAX_BYTES / 512; + } + + boot_data_fd = open(boot_data_file, O_WRONLY | O_CREAT, 0644); + if (boot_data_fd < 0) { + perror("open boot data file"); + ret = 1; + goto boot_data_close; + } + + boot_buf = calloc(1, sizeof(__u8) * boot_blocks * 512); + mioc = calloc(1, sizeof(struct mmc_ioc_multi_cmd) + + 2 * sizeof(struct mmc_ioc_cmd)); + if (!mioc || !boot_buf) { + perror("Failed to allocate memory"); + ret = -ENOMEM; + goto alloced_error; + } + + mioc->num_of_cmds = 2; + mioc->cmds[0].opcode = MMC_GO_IDLE_STATE; + mioc->cmds[0].arg = MMC_GO_PRE_IDLE_STATE_ARG; + mioc->cmds[0].flags = MMC_RSP_NONE | MMC_CMD_AC; + mioc->cmds[0].write_flag = 0; + + mioc->cmds[1].opcode = MMC_GO_IDLE_STATE; + mioc->cmds[1].arg = MMC_BOOT_INITIATION_ARG; + mioc->cmds[1].flags = MMC_RSP_NONE | MMC_CMD_ADTC; + mioc->cmds[1].write_flag = 0; + mioc->cmds[1].blksz = 512; + mioc->cmds[1].blocks = boot_blocks; + /* Access time of boot part differs wildly, spec mandates 1s */ + mioc->cmds[1].data_timeout_ns = 2 * 1000 * 1000 * 1000; + mmc_ioc_cmd_set_data(mioc->cmds[1], boot_buf); + + ret = ioctl(fd, MMC_IOC_MULTI_CMD, mioc); + if (ret) { + perror("multi-cmd ioctl error\n"); + goto alloced_error; + } + + ret = DO_IO(write, boot_data_fd, boot_buf, boot_blocks * 512); + if (ret < 0) { + perror("Write error\n"); + goto alloced_error; + } + ret = 0; + +alloced_error: + if (mioc) + free(mioc); + if (boot_buf) + free(boot_buf); +boot_data_close: + close(boot_data_fd); +dev_fd_close: + close(fd); + if (ret) + exit(1); + return 0; +} diff --git a/mmc_cmds.h b/mmc_cmds.h index faab362..5f2bef1 100644 --- a/mmc_cmds.h +++ b/mmc_cmds.h @@ -49,3 +49,4 @@ int do_erase(int nargs, char **argv); int do_general_cmd_read(int nargs, char **argv); int do_softreset(int nargs, char **argv); int do_preidle(int nargs, char **argv); +int do_alt_boot_op(int nargs, char **argv);