From patchwork Thu Sep 13 15:44:57 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 10599751 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8546A14E5 for ; Thu, 13 Sep 2018 15:46:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7D5AB2B15B for ; Thu, 13 Sep 2018 15:46:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 70BAF2B162; Thu, 13 Sep 2018 15:46:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 0C26F2B15B for ; Thu, 13 Sep 2018 15:46:40 +0000 (UTC) Received: from localhost ([::1]:43151 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g0TpH-0007w9-W3 for patchwork-qemu-devel@patchwork.kernel.org; Thu, 13 Sep 2018 11:46:40 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42569) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g0To0-00078x-E4 for qemu-devel@nongnu.org; Thu, 13 Sep 2018 11:45:21 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1g0Tnv-0002sL-LP for qemu-devel@nongnu.org; Thu, 13 Sep 2018 11:45:19 -0400 Received: from baptiste.telenet-ops.be ([2a02:1800:120:4::f00:13]:49108) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1g0Tnq-0002j5-PY for qemu-devel@nongnu.org; Thu, 13 Sep 2018 11:45:12 -0400 Received: from ramsan.of.borg ([84.194.111.163]) by baptiste.telenet-ops.be with bizsmtp id b3l51y00w3XaVaC013l5qp; Thu, 13 Sep 2018 17:45:07 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtp (Exim 4.86_2) (envelope-from ) id 1g0Tnl-00018N-8g; Thu, 13 Sep 2018 17:45:05 +0200 Received: from geert by rox.of.borg with local (Exim 4.90_1) (envelope-from ) id 1g0Tnl-0006Ex-7c; Thu, 13 Sep 2018 17:45:05 +0200 From: Geert Uytterhoeven To: Peter Maydell , Alex Williamson Date: Thu, 13 Sep 2018 17:44:57 +0200 Message-Id: <20180913154458.23939-3-geert+renesas@glider.be> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180913154458.23939-1-geert+renesas@glider.be> References: <20180913154458.23939-1-geert+renesas@glider.be> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 2a02:1800:120:4::f00:13 Subject: [Qemu-devel] [PATCH v4 2/3] hw/arm/sysbus-fdt: Allow device matching with DT compatible value X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Pinchart , Geert Uytterhoeven , Wolfram Sang , Kieran Bingham , Magnus Damm , qemu-devel@nongnu.org, linux-renesas-soc@vger.kernel.org, Auger Eric , qemu-arm@nongnu.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Auger Eric Up to now we have relied on the device type to identify a device tree node creation function. Since we would like the vfio-platform device to be instantiatable with different compatible strings we introduce the capability to specialize the node creation depending on actual compatible value. NodeCreationPair is renamed into BindingEntry. The struct is enhanced with compat and match_fn() fields. We introduce a new matching function adapted to the vfio-platform generic device. Soon, the AMD XGBE can be instantiated with either manner, i.e.: -device vfio-amd-xgbe,host=e0900000.xgmac or using the new option line: -device vfio-platform,host=e0900000.xgmac Signed-off-by: Eric Auger [geert: Match using compatible values in sysfs instead of user-supplied manufacturer/model options, reword] Signed-off-by: Geert Uytterhoeven Tested-by: Eric Auger Reviewed-by: Eric Auger Tested-by: Eric Auger --- v4: - Add Tested-by (with amd-xgbe), - s/From now on/Soon/ in patch description, v3: - Match using the compatible values from sysfs instead of using user-supplied manufacturer and model options, - Reword patch description, - Drop RFC state, v2: - No changes, v1: - No changes, v0: - Original version from Eric. --- hw/arm/sysbus-fdt.c | 61 ++++++++++++++++++++++++++++++++++----------- 1 file changed, 47 insertions(+), 14 deletions(-) diff --git a/hw/arm/sysbus-fdt.c b/hw/arm/sysbus-fdt.c index 43d6a7bb48ddc351..0e24c803a1c2c734 100644 --- a/hw/arm/sysbus-fdt.c +++ b/hw/arm/sysbus-fdt.c @@ -50,11 +50,13 @@ typedef struct PlatformBusFDTData { PlatformBusDevice *pbus; } PlatformBusFDTData; -/* struct that associates a device type name and a node creation function */ -typedef struct NodeCreationPair { +/* struct that allows to match a device and create its FDT node */ +typedef struct BindingEntry { const char *typename; - int (*add_fdt_node_fn)(SysBusDevice *sbdev, void *opaque); -} NodeCreationPair; + const char *compat; + int (*add_fn)(SysBusDevice *sbdev, void *opaque); + bool (*match_fn)(SysBusDevice *sbdev, const struct BindingEntry *combo); +} BindingEntry; /* helpers */ @@ -413,6 +415,27 @@ static int add_amd_xgbe_fdt_node(SysBusDevice *sbdev, void *opaque) return 0; } +/* DT compatible matching */ +static bool vfio_platform_match(SysBusDevice *sbdev, + const BindingEntry *entry) +{ + VFIOPlatformDevice *vdev = VFIO_PLATFORM_DEVICE(sbdev); + const char *compat; + unsigned int n; + + for (n = vdev->num_compat, compat = vdev->compat; n > 0; + n--, compat += strlen(compat) + 1) { + if (!strcmp(entry->compat, compat)) { + return true; + } + } + + return false; +} + +#define VFIO_PLATFORM_BINDING(compat, add_fn) \ + {TYPE_VFIO_PLATFORM, (compat), (add_fn), vfio_platform_match} + #endif /* CONFIG_LINUX */ static int no_fdt_node(SysBusDevice *sbdev, void *opaque) @@ -420,14 +443,23 @@ static int no_fdt_node(SysBusDevice *sbdev, void *opaque) return 0; } -/* list of supported dynamic sysbus devices */ -static const NodeCreationPair add_fdt_node_functions[] = { +/* Device type based matching */ +static bool type_match(SysBusDevice *sbdev, const BindingEntry *entry) +{ + return !strcmp(object_get_typename(OBJECT(sbdev)), entry->typename); +} + +#define TYPE_BINDING(type, add_fn) {(type), NULL, (add_fn), type_match} + +/* list of supported dynamic sysbus bindings */ +static const BindingEntry bindings[] = { #ifdef CONFIG_LINUX - {TYPE_VFIO_CALXEDA_XGMAC, add_calxeda_midway_xgmac_fdt_node}, - {TYPE_VFIO_AMD_XGBE, add_amd_xgbe_fdt_node}, + TYPE_BINDING(TYPE_VFIO_CALXEDA_XGMAC, add_calxeda_midway_xgmac_fdt_node), + TYPE_BINDING(TYPE_VFIO_AMD_XGBE, add_amd_xgbe_fdt_node), + VFIO_PLATFORM_BINDING("amd,xgbe-seattle-v1a", add_amd_xgbe_fdt_node), #endif - {TYPE_RAMFB_DEVICE, no_fdt_node}, - {"", NULL}, /* last element */ + TYPE_BINDING(TYPE_RAMFB_DEVICE, no_fdt_node), + TYPE_BINDING("", NULL), /* last element */ }; /* Generic Code */ @@ -446,10 +478,11 @@ static void add_fdt_node(SysBusDevice *sbdev, void *opaque) { int i, ret; - for (i = 0; i < ARRAY_SIZE(add_fdt_node_functions); i++) { - if (!strcmp(object_get_typename(OBJECT(sbdev)), - add_fdt_node_functions[i].typename)) { - ret = add_fdt_node_functions[i].add_fdt_node_fn(sbdev, opaque); + for (i = 0; i < ARRAY_SIZE(bindings); i++) { + const BindingEntry *iter = &bindings[i]; + + if (iter->match_fn(sbdev, iter)) { + ret = iter->add_fn(sbdev, opaque); assert(!ret); return; }