From patchwork Tue Jul 10 00:03:19 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Anton Vorontsov X-Patchwork-Id: 9905 Return-Path: X-Original-To: patchwork@peony.canonical.com Delivered-To: patchwork@peony.canonical.com Received: from fiordland.canonical.com (fiordland.canonical.com [91.189.94.145]) by peony.canonical.com (Postfix) with ESMTP id CD6C223E01 for ; Tue, 10 Jul 2012 00:06:54 +0000 (UTC) Received: from mail-gh0-f180.google.com (mail-gh0-f180.google.com [209.85.160.180]) by fiordland.canonical.com (Postfix) with ESMTP id E9E7CA18757 for ; Tue, 10 Jul 2012 00:06:53 +0000 (UTC) Received: by ghbz12 with SMTP id z12so11495049ghb.11 for ; Mon, 09 Jul 2012 17:06:53 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-forwarded-to:x-forwarded-for:delivered-to:received-spf:from:to:cc :subject:date:message-id:x-mailer:in-reply-to:references :mime-version:content-type:content-transfer-encoding :x-gm-message-state; bh=APmLNcIOZHcFEs9rpHytNikgI9rnJp0WLsZHRlYtXg4=; b=ossxm3sGYrxqgZ54aYFw1IprmZcmo/Y3CjiyWjwHiYOmaLBvrIgn0at08hm8X6raty bqCTflpsiMtxxgsydGMSqYQqLofHAxyT4hI7+FNkolMd2LcmHTlaztH6ioFBvXbcRnfq 98yBChoyWrCcWBO4rB2uu4gPamCqK8SZ6FK7CFaZTLqMNk4ADLILE5KjwWcoDFgwsgt2 89YT3xvJ1PuZQ4b50qB72j9q1Ho1/ZQ5okDBzETktUvssvaUWkxV/K2lyYSIXCt9eVdY ZyhZMWGmSrp1EFFWLOT1l/tyllVDp8tF/9q61ityybHH4C17JjWc61gZGRr4T2BRzsEI 6kMw== Received: by 10.50.203.39 with SMTP id kn7mr9714062igc.53.1341878813143; Mon, 09 Jul 2012 17:06:53 -0700 (PDT) X-Forwarded-To: linaro-patchwork@canonical.com X-Forwarded-For: patch@linaro.org linaro-patchwork@canonical.com Delivered-To: patches@linaro.org Received: by 10.231.24.148 with SMTP id v20csp42605ibb; Mon, 9 Jul 2012 17:06:52 -0700 (PDT) Received: by 10.101.134.26 with SMTP id l26mr14592083ann.65.1341878812078; Mon, 09 Jul 2012 17:06:52 -0700 (PDT) Received: from mail-yw0-f50.google.com (mail-yw0-f50.google.com [209.85.213.50]) by mx.google.com with ESMTPS id i49si28320400yhn.24.2012.07.09.17.06.51 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 09 Jul 2012 17:06:52 -0700 (PDT) Received-SPF: neutral (google.com: 209.85.213.50 is neither permitted nor denied by best guess record for domain of anton.vorontsov@linaro.org) client-ip=209.85.213.50; Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.213.50 is neither permitted nor denied by best guess record for domain of anton.vorontsov@linaro.org) smtp.mail=anton.vorontsov@linaro.org Received: by yhjj63 with SMTP id j63so6221105yhj.37 for ; Mon, 09 Jul 2012 17:06:51 -0700 (PDT) Received: by 10.66.74.69 with SMTP id r5mr69120609pav.56.1341878811418; Mon, 09 Jul 2012 17:06:51 -0700 (PDT) Received: from localhost (c-71-204-165-222.hsd1.ca.comcast.net. [71.204.165.222]) by mx.google.com with ESMTPS id sk5sm28648858pbc.7.2012.07.09.17.06.49 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 09 Jul 2012 17:06:50 -0700 (PDT) From: Anton Vorontsov To: Greg Kroah-Hartman , Kees Cook , Colin Cross , Tony Luck Cc: Dan Carpenter , Arnd Bergmann , John Stultz , Shuah Khan , arve@android.com, Rebecca Schultz Zavin , Jesper Juhl , Randy Dunlap , Stephen Boyd , Thomas Meyer , Andrew Morton , Marco Stornelli , WANG Cong , linux-kernel@vger.kernel.org, devel@driverdev.osuosl.org, linaro-kernel@lists.linaro.org, patches@linaro.org, kernel-team@android.com Subject: [PATCH 2/3] pstore/ram: Make ECC size configurable Date: Mon, 9 Jul 2012 17:03:19 -0700 Message-Id: <1341878600-2139-2-git-send-email-anton.vorontsov@linaro.org> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <20120709234559.GA22203@lizard> References: <20120709234559.GA22203@lizard> MIME-Version: 1.0 X-Gm-Message-State: ALoCoQkcRs3n8zfnH98yS4QpSgbJBP+5nJisZgD3c6l7xw2loszgiRssuWrwdJFHl+1Rs9/NuJxT This is now pretty straightforward: instead of using bool, just pass an integer. For backwards compatibility ramoops.ecc=1 means 16 bytes ECC (using 1 byte for ECC isn't much of use anyway). Suggested-by: Arve Hjønnevåg Signed-off-by: Anton Vorontsov --- fs/pstore/ram.c | 22 ++++++++++++++-------- fs/pstore/ram_core.c | 15 ++++++++------- include/linux/pstore_ram.h | 4 ++-- 3 files changed, 24 insertions(+), 17 deletions(-) diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 58b93fb..b39aebb 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -63,7 +63,9 @@ MODULE_PARM_DESC(dump_oops, static int ramoops_ecc; module_param_named(ecc, ramoops_ecc, int, 0600); MODULE_PARM_DESC(ramoops_ecc, - "set to 1 to enable ECC support"); + "if non-zero, the option enables ECC support and specifies " + "ECC buffer size in bytes (1 is a special value, means 16 " + "bytes ECC)"); struct ramoops_context { struct persistent_ram_zone **przs; @@ -73,7 +75,7 @@ struct ramoops_context { size_t record_size; size_t console_size; int dump_oops; - bool ecc; + int ecc_size; unsigned int max_dump_cnt; unsigned int dump_write_cnt; unsigned int dump_read_cnt; @@ -288,7 +290,7 @@ static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt, for (i = 0; i < cxt->max_dump_cnt; i++) { size_t sz = cxt->record_size; - cxt->przs[i] = persistent_ram_new(*paddr, sz, cxt->ecc); + cxt->przs[i] = persistent_ram_new(*paddr, sz, cxt->ecc_size); if (IS_ERR(cxt->przs[i])) { err = PTR_ERR(cxt->przs[i]); dev_err(dev, "failed to request mem region (0x%zx@0x%llx): %d\n", @@ -314,7 +316,7 @@ static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt, if (*paddr + sz > *paddr + cxt->size) return -ENOMEM; - *prz = persistent_ram_new(*paddr, sz, cxt->ecc); + *prz = persistent_ram_new(*paddr, sz, cxt->ecc_size); if (IS_ERR(*prz)) { int err = PTR_ERR(*prz); @@ -361,7 +363,7 @@ static int __devinit ramoops_probe(struct platform_device *pdev) cxt->record_size = pdata->record_size; cxt->console_size = pdata->console_size; cxt->dump_oops = pdata->dump_oops; - cxt->ecc = pdata->ecc; + cxt->ecc_size = pdata->ecc_size; paddr = cxt->phys_addr; @@ -411,9 +413,9 @@ static int __devinit ramoops_probe(struct platform_device *pdev) record_size = pdata->record_size; dump_oops = pdata->dump_oops; - pr_info("attached 0x%lx@0x%llx, ecc: %s\n", + pr_info("attached 0x%lx@0x%llx, ecc: %d\n", cxt->size, (unsigned long long)cxt->phys_addr, - ramoops_ecc ? "on" : "off"); + cxt->ecc_size); return 0; @@ -478,7 +480,11 @@ static void ramoops_register_dummy(void) dummy_data->record_size = record_size; dummy_data->console_size = ramoops_console_size; dummy_data->dump_oops = dump_oops; - dummy_data->ecc = ramoops_ecc; + /* + * For backwards compatibility ramoops.ecc=1 means 16 bytes ECC + * (using 1 byte for ECC isn't much of use anyway). + */ + dummy_data->ecc_size = ramoops_ecc == 1 ? 16 : ramoops_ecc; dummy = platform_device_register_data(NULL, "ramoops", -1, dummy_data, sizeof(struct ramoops_platform_data)); diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c index 3f4d6e6..7e5a2a9 100644 --- a/fs/pstore/ram_core.c +++ b/fs/pstore/ram_core.c @@ -171,7 +171,8 @@ static void persistent_ram_ecc_old(struct persistent_ram_zone *prz) } } -static int persistent_ram_init_ecc(struct persistent_ram_zone *prz) +static int persistent_ram_init_ecc(struct persistent_ram_zone *prz, + int ecc_size) { int numerr; struct persistent_ram_buffer *buffer = prz->buffer; @@ -184,7 +185,7 @@ static int persistent_ram_init_ecc(struct persistent_ram_zone *prz) return 0; prz->ecc_block_size = 128; - prz->ecc_size = 16; + prz->ecc_size = ecc_size; ecc_blocks = DIV_ROUND_UP(prz->buffer_size, prz->ecc_block_size); ecc_total = (ecc_blocks + 1) * prz->ecc_size; @@ -390,13 +391,13 @@ static int persistent_ram_buffer_map(phys_addr_t start, phys_addr_t size, } static int __devinit persistent_ram_post_init(struct persistent_ram_zone *prz, - bool ecc) + int ecc_size) { int ret; - prz->ecc = ecc; + prz->ecc = ecc_size; - ret = persistent_ram_init_ecc(prz); + ret = persistent_ram_init_ecc(prz, ecc_size); if (ret) return ret; @@ -444,7 +445,7 @@ void persistent_ram_free(struct persistent_ram_zone *prz) struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, size_t size, - bool ecc) + int ecc_size) { struct persistent_ram_zone *prz; int ret = -ENOMEM; @@ -459,7 +460,7 @@ struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, if (ret) goto err; - ret = persistent_ram_post_init(prz, ecc); + ret = persistent_ram_post_init(prz, ecc_size); if (ret) goto err; diff --git a/include/linux/pstore_ram.h b/include/linux/pstore_ram.h index a0975c0..94b79f1 100644 --- a/include/linux/pstore_ram.h +++ b/include/linux/pstore_ram.h @@ -48,7 +48,7 @@ struct persistent_ram_zone { struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, size_t size, - bool ecc); + int ecc_size); void persistent_ram_free(struct persistent_ram_zone *prz); void persistent_ram_zap(struct persistent_ram_zone *prz); @@ -74,7 +74,7 @@ struct ramoops_platform_data { unsigned long record_size; unsigned long console_size; int dump_oops; - bool ecc; + int ecc_size; }; #endif