From patchwork Wed Jul 25 14:34:13 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 949245 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=glider.be Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 41bHp7159lz9rxx for ; Thu, 26 Jul 2018 00:35:43 +1000 (AEST) Received: from localhost ([::1]:51571 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fiKtA-0001ce-PF for incoming@patchwork.ozlabs.org; Wed, 25 Jul 2018 10:35:40 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48554) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fiKs0-00018P-18 for qemu-devel@nongnu.org; Wed, 25 Jul 2018 10:34:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fiKrx-00069E-1g for qemu-devel@nongnu.org; Wed, 25 Jul 2018 10:34:28 -0400 Received: from xavier.telenet-ops.be ([2a02:1800:120:4::f00:14]:34204) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fiKrw-00067H-Nz for qemu-devel@nongnu.org; Wed, 25 Jul 2018 10:34:24 -0400 Received: from ramsan.of.borg ([84.194.111.163]) by xavier.telenet-ops.be with bizsmtp id F2aJ1y00H3XaVaC012aJ9e; Wed, 25 Jul 2018 16:34:22 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtp (Exim 4.86_2) (envelope-from ) id 1fiKrq-00052C-9R; Wed, 25 Jul 2018 16:34:18 +0200 Received: from geert by rox.of.borg with local (Exim 4.90_1) (envelope-from ) id 1fiKrq-0002Xv-7m; Wed, 25 Jul 2018 16:34:18 +0200 From: Geert Uytterhoeven To: Peter Maydell , Alex Williamson Date: Wed, 25 Jul 2018 16:34:13 +0200 Message-Id: <20180725143413.9728-5-geert+renesas@glider.be> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180725143413.9728-1-geert+renesas@glider.be> References: <20180725143413.9728-1-geert+renesas@glider.be> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 2a02:1800:120:4::f00:14 Subject: [Qemu-devel] [PATCH v3 4/4] hw/arm/sysbus-fdt: Add support for instantiating generic devices 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Add a fallback for instantiating generic devices without a type-specific or compatible-specific instantation method. This will be used when no other match is found. The generic instantation method creates a device node with "reg" and (optional) "interrupts" properties, and copies the "compatible" property and other optional properties from the host. For now the following optional properties are copied, if found: - "#gpio-cells", - "gpio-controller", - "#interrupt-cells", - "interrupt-controller", - "interrupt-names". More can be added when needed. This avoids having to write device-specific instantation methods for each and every "simple" device using only a set of generic properties. Devices that need more specialized handling can still provide their own instantation method. This has been tested on a Renesas Salvator-XS board with R-Car H3 ES2.0 with SATA: -device vfio-platform,host=ee300000.sata and GPIO (needs VFIO No-IOMMU support): -device vfio-platform,host=e6055400.gpio Signed-off-by: Geert Uytterhoeven --- v3: - New. --- hw/arm/sysbus-fdt.c | 102 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) diff --git a/hw/arm/sysbus-fdt.c b/hw/arm/sysbus-fdt.c index 0e24c803a1c2c734..8040af00ccf131d7 100644 --- a/hw/arm/sysbus-fdt.c +++ b/hw/arm/sysbus-fdt.c @@ -415,6 +415,99 @@ static int add_amd_xgbe_fdt_node(SysBusDevice *sbdev, void *opaque) return 0; } +static HostProperty generic_copied_properties[] = { + {"compatible", false}, + {"#gpio-cells", true}, + {"gpio-controller", true}, + {"#interrupt-cells", true}, + {"interrupt-controller", true}, + {"interrupt-names", true}, +}; + +/** + * add_generic_fdt_node + * + * Generates a generic DT node by copying properties from the host + */ +static int add_generic_fdt_node(SysBusDevice *sbdev, void *opaque) +{ + PlatformBusFDTData *data = opaque; + VFIOPlatformDevice *vdev = VFIO_PLATFORM_DEVICE(sbdev); + const char *parent_node = data->pbus_node_name; + void *guest_fdt = data->fdt, *host_fdt; + VFIODevice *vbasedev = &vdev->vbasedev; + char **node_path, *node_name, *dt_name; + PlatformBusDevice *pbus = data->pbus; + int i, irq_number; + uint32_t *reg_attr, *irq_attr; + uint64_t mmio_base; + + host_fdt = load_device_tree_from_sysfs(); + + dt_name = sysfs_to_dt_name(vbasedev->name); + if (!dt_name) { + error_report("%s incorrect sysfs device name %s", __func__, + vbasedev->name); + exit(1); + } + node_path = qemu_fdt_node_path(host_fdt, dt_name, vdev->compat, + &error_fatal); + if (!node_path || !node_path[0]) { + error_report("%s unable to retrieve node path for %s/%s", __func__, + dt_name, vdev->compat); + exit(1); + } + + if (node_path[1]) { + error_report("%s more than one node matching %s/%s!", __func__, dt_name, + vdev->compat); + exit(1); + } + + mmio_base = platform_bus_get_mmio_addr(pbus, sbdev, 0); + node_name = g_strdup_printf("%s/%s@%" PRIx64, parent_node, + vbasedev->name, mmio_base); + qemu_fdt_add_subnode(guest_fdt, node_name); + + /* Copy generic properties */ + copy_properties_from_host(generic_copied_properties, + ARRAY_SIZE(generic_copied_properties), host_fdt, + guest_fdt, node_path[0], node_name); + + /* Copy reg (remapped) */ + reg_attr = g_new(uint32_t, vbasedev->num_regions * 2); + for (i = 0; i < vbasedev->num_regions; i++) { + mmio_base = platform_bus_get_mmio_addr(pbus, sbdev, i); + reg_attr[2 * i] = cpu_to_be32(mmio_base); + reg_attr[2 * i + 1] = cpu_to_be32( + memory_region_size(vdev->regions[i]->mem)); + } + qemu_fdt_setprop(guest_fdt, node_name, "reg", reg_attr, + vbasedev->num_regions * 2 * sizeof(uint32_t)); + + /* Copy interrupts (remapped) */ + if (vbasedev->num_irqs) { + irq_attr = g_new(uint32_t, vbasedev->num_irqs * 3); + for (i = 0; i < vbasedev->num_irqs; i++) { + irq_number = platform_bus_get_irqn(pbus, sbdev , i) + + data->irq_start; + irq_attr[3 * i] = cpu_to_be32(GIC_FDT_IRQ_TYPE_SPI); + irq_attr[3 * i + 1] = cpu_to_be32(irq_number); + irq_attr[3 * i + 2] = cpu_to_be32(GIC_FDT_IRQ_FLAGS_LEVEL_HI); + } + qemu_fdt_setprop(guest_fdt, node_name, "interrupts", + irq_attr, vbasedev->num_irqs * 3 * sizeof(uint32_t)); + g_free(irq_attr); + } + + g_free(reg_attr); + g_free(node_name); + g_strfreev(node_path); + g_free(dt_name); + g_free(host_fdt); + return 0; +} + /* DT compatible matching */ static bool vfio_platform_match(SysBusDevice *sbdev, const BindingEntry *entry) @@ -423,6 +516,11 @@ static bool vfio_platform_match(SysBusDevice *sbdev, const char *compat; unsigned int n; + if (!entry->compat) { + /* Generic DT fallback */ + return true; + } + for (n = vdev->num_compat, compat = vdev->compat; n > 0; n--, compat += strlen(compat) + 1) { if (!strcmp(entry->compat, compat)) { @@ -459,6 +557,10 @@ static const BindingEntry bindings[] = { VFIO_PLATFORM_BINDING("amd,xgbe-seattle-v1a", add_amd_xgbe_fdt_node), #endif TYPE_BINDING(TYPE_RAMFB_DEVICE, no_fdt_node), +#ifdef CONFIG_LINUX + /* Generic DT fallback must be last */ + VFIO_PLATFORM_BINDING(NULL, add_generic_fdt_node), +#endif TYPE_BINDING("", NULL), /* last element */ };