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GET /api/patches/815482/?format=api
{ "id": 815482, "url": "http://patchwork.ozlabs.org/api/patches/815482/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20170919115814.14724-2-marcandre.lureau@redhat.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20170919115814.14724-2-marcandre.lureau@redhat.com>", "list_archive_url": null, "date": "2017-09-19T11:58:11", "name": "[v2,1/4] fw_cfg: add DMA register", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "e4ac5a8e6e5b86f9d5f30dbc6dd638d8fc851ff3", "submitter": { "id": 66774, "url": "http://patchwork.ozlabs.org/api/people/66774/?format=api", "name": "Marc-André Lureau", "email": "marcandre.lureau@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20170919115814.14724-2-marcandre.lureau@redhat.com/mbox/", "series": [ { "id": 3856, "url": "http://patchwork.ozlabs.org/api/series/3856/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=3856", "date": "2017-09-19T11:58:10", "name": "fw_cfg: add DMA operations & etc/vmcoreinfo support", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/3856/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/815482/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/815482/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@bilbo.ozlabs.org", "Authentication-Results": [ "ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=<UNKNOWN>)", "ext-mx03.extmail.prod.ext.phx2.redhat.com;\n\tdmarc=none (p=none dis=none) header.from=redhat.com", "ext-mx03.extmail.prod.ext.phx2.redhat.com;\n\tspf=fail smtp.mailfrom=marcandre.lureau@redhat.com" ], "Received": [ "from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11])\n\t(using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xxLxy3z71z9s7m\n\tfor <incoming@patchwork.ozlabs.org>;\n\tTue, 19 Sep 2017 21:59:02 +1000 (AEST)", "from localhost ([::1]:41995 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>)\n\tid 1duHB6-0007O6-KS\n\tfor incoming@patchwork.ozlabs.org; Tue, 19 Sep 2017 07:59:00 -0400", "from eggs.gnu.org ([2001:4830:134:3::10]:40556)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from <marcandre.lureau@redhat.com>) id 1duHAY-0007J0-DV\n\tfor qemu-devel@nongnu.org; Tue, 19 Sep 2017 07:58:27 -0400", "from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from <marcandre.lureau@redhat.com>) id 1duHAW-0001vM-K5\n\tfor qemu-devel@nongnu.org; Tue, 19 Sep 2017 07:58:26 -0400", "from mx1.redhat.com ([209.132.183.28]:37938)\n\tby eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from <marcandre.lureau@redhat.com>)\n\tid 1duHAW-0001um-C3\n\tfor qemu-devel@nongnu.org; Tue, 19 Sep 2017 07:58:24 -0400", "from smtp.corp.redhat.com\n\t(int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11])\n\t(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby mx1.redhat.com (Postfix) with ESMTPS id 59A447E431;\n\tTue, 19 Sep 2017 11:58:23 +0000 (UTC)", "from localhost (ovpn-112-56.ams2.redhat.com [10.36.112.56])\n\tby smtp.corp.redhat.com (Postfix) with ESMTP id 9D27861342;\n\tTue, 19 Sep 2017 11:58:22 +0000 (UTC)" ], "DMARC-Filter": "OpenDMARC Filter v1.3.2 mx1.redhat.com 59A447E431", "From": "marcandre.lureau@redhat.com", "To": "linux-kernel@vger.kernel.org", "Date": "Tue, 19 Sep 2017 13:58:11 +0200", "Message-Id": "<20170919115814.14724-2-marcandre.lureau@redhat.com>", "In-Reply-To": "<20170919115814.14724-1-marcandre.lureau@redhat.com>", "References": "<20170919115814.14724-1-marcandre.lureau@redhat.com>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "X-Scanned-By": "MIMEDefang 2.79 on 10.5.11.11", "X-Greylist": "Sender IP whitelisted, not delayed by milter-greylist-4.5.16\n\t(mx1.redhat.com [10.5.110.27]);\n\tTue, 19 Sep 2017 11:58:23 +0000 (UTC)", "Content-Transfer-Encoding": "quoted-printable", "X-detected-operating-system": "by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]\n\t[fuzzy]", "X-Received-From": "209.132.183.28", "Subject": "[Qemu-devel] [PATCH v2 1/4] fw_cfg: add DMA register", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.21", "Precedence": "list", "List-Id": "<qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n\t<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<http://lists.nongnu.org/archive/html/qemu-devel/>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n\t<mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Cc": "=?utf-8?q?Marc-Andr=C3=A9_Lureau?= <marcandre.lureau@redhat.com>,\n\tsomlo@cmu.edu, qemu-devel@nongnu.org, mst@redhat.com", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "\"Qemu-devel\"\n\t<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>" }, "content": "From: Marc-André Lureau <marcandre.lureau@redhat.com>\n\nAdd an optional <dma_off> kernel module (or command line) parameter\nusing the following syntax:\n\n [fw_cfg.]ioport=<size>@<base>[:<ctrl_off>:<data_off>[:<dma_off>]]\n or\n [fw_cfg.]mmio=<size>@<base>[:<ctrl_off>:<data_off>[:<dma_off>]]\n\nand initializes the register address using given or default offset.\n\nSigned-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>\n---\n drivers/firmware/qemu_fw_cfg.c | 53 ++++++++++++++++++++++++++++++++----------\n 1 file changed, 41 insertions(+), 12 deletions(-)", "diff": "diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c\nindex 0e2011636fbb..614037703530 100644\n--- a/drivers/firmware/qemu_fw_cfg.c\n+++ b/drivers/firmware/qemu_fw_cfg.c\n@@ -10,20 +10,21 @@\n * and select subsets of aarch64), a Device Tree node (on arm), or using\n * a kernel module (or command line) parameter with the following syntax:\n *\n- * [fw_cfg.]ioport=<size>@<base>[:<ctrl_off>:<data_off>]\n+ * [fw_cfg.]ioport=<size>@<base>[:<ctrl_off>:<data_off>[:<dma_off>]]\n * or\n- * [fw_cfg.]mmio=<size>@<base>[:<ctrl_off>:<data_off>]\n+ * [fw_cfg.]mmio=<size>@<base>[:<ctrl_off>:<data_off>[:<dma_off>]]\n *\n * where:\n * <size> := size of ioport or mmio range\n * <base> := physical base address of ioport or mmio range\n * <ctrl_off> := (optional) offset of control register\n * <data_off> := (optional) offset of data register\n+ * <dma_off> := (optional) offset of dma register\n *\n * e.g.:\n- * fw_cfg.ioport=2@0x510:0:1\t\t(the default on x86)\n+ * fw_cfg.ioport=2@0x510:0:1:4\t\t(the default on x86)\n * or\n- * fw_cfg.mmio=0xA@0x9020000:8:0\t\t(the default on arm)\n+ * fw_cfg.mmio=0xA@0x9020000:8:0:16\t(the default on arm)\n */\n \n #include <linux/module.h>\n@@ -63,6 +64,7 @@ static resource_size_t fw_cfg_p_size;\n static void __iomem *fw_cfg_dev_base;\n static void __iomem *fw_cfg_reg_ctrl;\n static void __iomem *fw_cfg_reg_data;\n+static void __iomem *fw_cfg_reg_dma;\n \n /* atomic access to fw_cfg device (potentially slow i/o, so using mutex) */\n static DEFINE_MUTEX(fw_cfg_dev_lock);\n@@ -118,12 +120,14 @@ static void fw_cfg_io_cleanup(void)\n # if (defined(CONFIG_ARM) || defined(CONFIG_ARM64))\n # define FW_CFG_CTRL_OFF 0x08\n # define FW_CFG_DATA_OFF 0x00\n+# define FW_CFG_DMA_OFF 0x10\n # elif (defined(CONFIG_PPC_PMAC) || defined(CONFIG_SPARC32)) /* ppc/mac,sun4m */\n # define FW_CFG_CTRL_OFF 0x00\n # define FW_CFG_DATA_OFF 0x02\n # elif (defined(CONFIG_X86) || defined(CONFIG_SPARC64)) /* x86, sun4u */\n # define FW_CFG_CTRL_OFF 0x00\n # define FW_CFG_DATA_OFF 0x01\n+# define FW_CFG_DMA_OFF 0x04\n # else\n # error \"QEMU FW_CFG not available on this architecture!\"\n # endif\n@@ -133,7 +137,7 @@ static void fw_cfg_io_cleanup(void)\n static int fw_cfg_do_platform_probe(struct platform_device *pdev)\n {\n \tchar sig[FW_CFG_SIG_SIZE];\n-\tstruct resource *range, *ctrl, *data;\n+\tstruct resource *range, *ctrl, *data, *dma;\n \n \t/* acquire i/o range details */\n \tfw_cfg_is_mmio = false;\n@@ -170,6 +174,7 @@ static int fw_cfg_do_platform_probe(struct platform_device *pdev)\n \t/* were custom register offsets provided (e.g. on the command line)? */\n \tctrl = platform_get_resource_byname(pdev, IORESOURCE_REG, \"ctrl\");\n \tdata = platform_get_resource_byname(pdev, IORESOURCE_REG, \"data\");\n+\tdma = platform_get_resource_byname(pdev, IORESOURCE_REG, \"dma\");\n \tif (ctrl && data) {\n \t\tfw_cfg_reg_ctrl = fw_cfg_dev_base + ctrl->start;\n \t\tfw_cfg_reg_data = fw_cfg_dev_base + data->start;\n@@ -179,6 +184,13 @@ static int fw_cfg_do_platform_probe(struct platform_device *pdev)\n \t\tfw_cfg_reg_data = fw_cfg_dev_base + FW_CFG_DATA_OFF;\n \t}\n \n+\tif (dma)\n+\t\tfw_cfg_reg_dma = fw_cfg_dev_base + dma->start;\n+#ifdef FW_CFG_DMA_OFF\n+\telse\n+\t\tfw_cfg_reg_dma = fw_cfg_dev_base + FW_CFG_DMA_OFF;\n+#endif\n+\n \t/* verify fw_cfg device signature */\n \tfw_cfg_read_blob(FW_CFG_SIGNATURE, sig, 0, FW_CFG_SIG_SIZE);\n \tif (memcmp(sig, \"QEMU\", FW_CFG_SIG_SIZE) != 0) {\n@@ -628,6 +640,7 @@ static struct platform_device *fw_cfg_cmdline_dev;\n /* use special scanf/printf modifier for phys_addr_t, resource_size_t */\n #define PH_ADDR_SCAN_FMT \"@%\" __PHYS_ADDR_PREFIX \"i%n\" \\\n \t\t\t \":%\" __PHYS_ADDR_PREFIX \"i\" \\\n+\t\t\t \":%\" __PHYS_ADDR_PREFIX \"i%n\" \\\n \t\t\t \":%\" __PHYS_ADDR_PREFIX \"i%n\"\n \n #define PH_ADDR_PR_1_FMT \"0x%\" __PHYS_ADDR_PREFIX \"x@\" \\\n@@ -637,12 +650,15 @@ static struct platform_device *fw_cfg_cmdline_dev;\n \t\t\t \":%\" __PHYS_ADDR_PREFIX \"u\" \\\n \t\t\t \":%\" __PHYS_ADDR_PREFIX \"u\"\n \n+#define PH_ADDR_PR_4_FMT PH_ADDR_PR_3_FMT \\\n+\t\t\t \":%\" __PHYS_ADDR_PREFIX \"u\"\n+\n static int fw_cfg_cmdline_set(const char *arg, const struct kernel_param *kp)\n {\n-\tstruct resource res[3] = {};\n+\tstruct resource res[4] = {};\n \tchar *str;\n \tphys_addr_t base;\n-\tresource_size_t size, ctrl_off, data_off;\n+\tresource_size_t size, ctrl_off, data_off, dma_off;\n \tint processed, consumed = 0;\n \n \t/* only one fw_cfg device can exist system-wide, so if one\n@@ -658,19 +674,20 @@ static int fw_cfg_cmdline_set(const char *arg, const struct kernel_param *kp)\n \t/* consume \"<size>\" portion of command line argument */\n \tsize = memparse(arg, &str);\n \n-\t/* get \"@<base>[:<ctrl_off>:<data_off>]\" chunks */\n+\t/* get \"@<base>[:<ctrl_off>:<data_off>[:<dma_off>]]\" chunks */\n \tprocessed = sscanf(str, PH_ADDR_SCAN_FMT,\n \t\t\t &base, &consumed,\n-\t\t\t &ctrl_off, &data_off, &consumed);\n+\t\t\t &ctrl_off, &data_off, &consumed,\n+\t\t\t &dma_off, &consumed);\n \n-\t/* sscanf() must process precisely 1 or 3 chunks:\n+\t/* sscanf() must process precisely 1, 3 or 4 chunks:\n \t * <base> is mandatory, optionally followed by <ctrl_off>\n-\t * and <data_off>;\n+\t * and <data_off>, and <dma_off>;\n \t * there must be no extra characters after the last chunk,\n \t * so str[consumed] must be '\\0'.\n \t */\n \tif (str[consumed] ||\n-\t (processed != 1 && processed != 3))\n+\t (processed != 1 && processed != 3 && process != 4))\n \t\treturn -EINVAL;\n \n \tres[0].start = base;\n@@ -687,6 +704,11 @@ static int fw_cfg_cmdline_set(const char *arg, const struct kernel_param *kp)\n \t\tres[2].start = data_off;\n \t\tres[2].flags = IORESOURCE_REG;\n \t}\n+\tif (processed > 3) {\n+\t\tres[3].name = \"dma\";\n+\t\tres[3].start = dma_off;\n+\t\tres[3].flags = IORESOURCE_REG;\n+\t}\n \n \t/* \"processed\" happens to nicely match the number of resources\n \t * we need to pass in to this platform device.\n@@ -721,6 +743,13 @@ static int fw_cfg_cmdline_get(char *buf, const struct kernel_param *kp)\n \t\t\t\tfw_cfg_cmdline_dev->resource[0].start,\n \t\t\t\tfw_cfg_cmdline_dev->resource[1].start,\n \t\t\t\tfw_cfg_cmdline_dev->resource[2].start);\n+\tcase 4:\n+\t\treturn snprintf(buf, PAGE_SIZE, PH_ADDR_PR_4_FMT,\n+\t\t\t\tresource_size(&fw_cfg_cmdline_dev->resource[0]),\n+\t\t\t\tfw_cfg_cmdline_dev->resource[0].start,\n+\t\t\t\tfw_cfg_cmdline_dev->resource[1].start,\n+\t\t\t\tfw_cfg_cmdline_dev->resource[2].start,\n+\t\t\t\tfw_cfg_cmdline_dev->resource[3].start);\n \t}\n \n \t/* Should never get here */\n", "prefixes": [ "v2", "1/4" ] }