From nobody Fri Apr 26 19:19:05 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1560319393; cv=none; d=zoho.com; s=zohoarc; b=f17S8d+OPTZWFyyIbv69Ed8V56oeHKvnZ3RxUPurMO9+NH+czaN2Mj5tuEyXdAWpKe+cTk5FJrmEilAmyfmGRk8vzS4vhCLSljm9pIonef9p7mkLuICbxo5wOj6oDhclx5k0gDnZCOKHngu0Oan18cycbbPbToczL3hhu/W1mOs= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1560319393; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=otAQ779+3ncrbRSTgp8ZKLh9urjrWtPugAfY+tAvZ9s=; b=WFxryl+s282BrYJvixivcQJmY2AWdxHVxj/gwWGvBQoQXk/cXTqSyk3063wbTGXRfV/pJIyzd6DSszg9PHpPiU60evx/rC9kTu5MTR0ceYtrrN3qIru73jaXyC/bncpd0BmHbA2I/Z5TTnq0B0O/jq4r5W2c8bzDXFRtgJ/Z0VQ= ARC-Authentication-Results: i=1; mx.zoho.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1560319393354997.7831911612287; Tue, 11 Jun 2019 23:03:13 -0700 (PDT) Received: from localhost ([::1]:56872 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hawLm-0006xX-0n for importer@patchew.org; Wed, 12 Jun 2019 02:03:10 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:58443) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1haw8l-0004Rq-EW for qemu-devel@nongnu.org; Wed, 12 Jun 2019 01:49:46 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1haw8j-00071k-9K for qemu-devel@nongnu.org; Wed, 12 Jun 2019 01:49:43 -0400 Received: from bilbo.ozlabs.org ([203.11.71.1]:36029 helo=ozlabs.org) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1haw8g-0006zi-ME; Wed, 12 Jun 2019 01:49:41 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 45NwtQ6ggpz9sNC; Wed, 12 Jun 2019 15:49:34 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1560318574; bh=8A/zGEQXWaU06j42fyfoXAwqsbhF/kNZZQ+ztY9cByM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N0jSpMkjtVythpFBKMEHoeGp35vF+84XWT0FMPTrED0YEJdXdRuPEcjYACAFWETlS JHdurTdOKkplODXQN68ELFothcSUgMymMGnMQzjXFn7dnt705iPXrL2pgw/L8HDu/I r3jiYfd8+gXfxzxE9oVGPwKJ1LLJNyG/n7Ziseao= From: David Gibson To: peter.maydell@linaro.org Date: Wed, 12 Jun 2019 15:49:20 +1000 Message-Id: <20190612054929.21136-5-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190612054929.21136-1-david@gibson.dropbear.id.au> References: <20190612054929.21136-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 203.11.71.1 Subject: [Qemu-devel] [PULL 04/13] spapr: Clean up device tree construction for PCI devices X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lvivier@redhat.com, "Michael S . Tsirkin" , aik@ozlabs.ru, qemu-devel@nongnu.org, groug@kaod.org, qemu-ppc@nongnu.org, clg@kaod.org, David Gibson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" spapr_create_pci_child_dt() is a trivial wrapper around spapr_populate_pci_child_dt(), but is the latter's only caller. So fold them together into spapr_dt_pci_device(), which closer matches our modern naming convention. While there, make a number of cleanups to the function itself. This is mostly using more temporary locals to avoid awkwardly long lines, and in some cases avoiding double reads of PCI config space variables. Signed-off-by: David Gibson Reviewed-by: Greg Kurz Acked-by: Michael S. Tsirkin --- hw/ppc/spapr_pci.c | 119 +++++++++++++++++++++------------------------ 1 file changed, 55 insertions(+), 64 deletions(-) diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c index e8173d3246..8e10fc6857 100644 --- a/hw/ppc/spapr_pci.c +++ b/hw/ppc/spapr_pci.c @@ -1219,57 +1219,75 @@ static const char *dt_name_from_class(uint8_t class= , uint8_t subclass, static uint32_t spapr_phb_get_pci_drc_index(SpaprPhbState *phb, PCIDevice *pdev); =20 -static void spapr_populate_pci_child_dt(PCIDevice *dev, void *fdt, int off= set, - SpaprPhbState *sphb) +/* create OF node for pci device and required OF DT properties */ +static int spapr_dt_pci_device(SpaprPhbState *sphb, PCIDevice *dev, + void *fdt, int parent_offset) { + int offset; + const gchar *basename; + gchar *nodename; + int slot =3D PCI_SLOT(dev->devfn); + int func =3D PCI_FUNC(dev->devfn); ResourceProps rp; - bool is_bridge =3D false; - int pci_status; - char *buf =3D NULL; uint32_t drc_index =3D spapr_phb_get_pci_drc_index(sphb, dev); + uint32_t header_type =3D pci_default_read_config(dev, PCI_HEADER_TYPE,= 1); + bool is_bridge =3D (header_type =3D=3D PCI_HEADER_TYPE_BRIDGE); + uint32_t vendor_id =3D pci_default_read_config(dev, PCI_VENDOR_ID, 2); + uint32_t device_id =3D pci_default_read_config(dev, PCI_DEVICE_ID, 2); + uint32_t revision_id =3D pci_default_read_config(dev, PCI_REVISION_ID,= 1); uint32_t ccode =3D pci_default_read_config(dev, PCI_CLASS_PROG, 3); - uint32_t max_msi, max_msix; + uint32_t irq_pin =3D pci_default_read_config(dev, PCI_INTERRUPT_PIN, 1= ); + uint32_t subsystem_id =3D pci_default_read_config(dev, PCI_SUBSYSTEM_I= D, 2); + uint32_t subsystem_vendor_id =3D + pci_default_read_config(dev, PCI_SUBSYSTEM_VENDOR_ID, 2); + uint32_t cache_line_size =3D + pci_default_read_config(dev, PCI_CACHE_LINE_SIZE, 1); + uint32_t pci_status =3D pci_default_read_config(dev, PCI_STATUS, 2); + gchar *loc_code; =20 - if (pci_default_read_config(dev, PCI_HEADER_TYPE, 1) =3D=3D - PCI_HEADER_TYPE_BRIDGE) { - is_bridge =3D true; + basename =3D dt_name_from_class((ccode >> 16) & 0xff, (ccode >> 8) & 0= xff, + ccode & 0xff); + + if (func !=3D 0) { + nodename =3D g_strdup_printf("%s@%x,%x", basename, slot, func); + } else { + nodename =3D g_strdup_printf("%s@%x", basename, slot); } =20 + _FDT(offset =3D fdt_add_subnode(fdt, parent_offset, nodename)); + + g_free(nodename); + /* in accordance with PAPR+ v2.7 13.6.3, Table 181 */ - _FDT(fdt_setprop_cell(fdt, offset, "vendor-id", - pci_default_read_config(dev, PCI_VENDOR_ID, 2))); - _FDT(fdt_setprop_cell(fdt, offset, "device-id", - pci_default_read_config(dev, PCI_DEVICE_ID, 2))); - _FDT(fdt_setprop_cell(fdt, offset, "revision-id", - pci_default_read_config(dev, PCI_REVISION_ID, 1)= )); + _FDT(fdt_setprop_cell(fdt, offset, "vendor-id", vendor_id)); + _FDT(fdt_setprop_cell(fdt, offset, "device-id", device_id)); + _FDT(fdt_setprop_cell(fdt, offset, "revision-id", revision_id)); + _FDT(fdt_setprop_cell(fdt, offset, "class-code", ccode)); - if (pci_default_read_config(dev, PCI_INTERRUPT_PIN, 1)) { - _FDT(fdt_setprop_cell(fdt, offset, "interrupts", - pci_default_read_config(dev, PCI_INTERRUPT_PIN, 1))); + if (irq_pin) { + _FDT(fdt_setprop_cell(fdt, offset, "interrupts", irq_pin)); } =20 if (!is_bridge) { - _FDT(fdt_setprop_cell(fdt, offset, "min-grant", - pci_default_read_config(dev, PCI_MIN_GNT, 1))); - _FDT(fdt_setprop_cell(fdt, offset, "max-latency", - pci_default_read_config(dev, PCI_MAX_LAT, 1))); + uint32_t min_grant =3D pci_default_read_config(dev, PCI_MIN_GNT, 1= ); + uint32_t max_latency =3D pci_default_read_config(dev, PCI_MAX_LAT,= 1); + _FDT(fdt_setprop_cell(fdt, offset, "min-grant", min_grant)); + _FDT(fdt_setprop_cell(fdt, offset, "max-latency", max_latency)); } =20 - if (pci_default_read_config(dev, PCI_SUBSYSTEM_ID, 2)) { - _FDT(fdt_setprop_cell(fdt, offset, "subsystem-id", - pci_default_read_config(dev, PCI_SUBSYSTEM_ID, 2))); + if (subsystem_id) { + _FDT(fdt_setprop_cell(fdt, offset, "subsystem-id", subsystem_id)); } =20 - if (pci_default_read_config(dev, PCI_SUBSYSTEM_VENDOR_ID, 2)) { + if (subsystem_vendor_id) { _FDT(fdt_setprop_cell(fdt, offset, "subsystem-vendor-id", - pci_default_read_config(dev, PCI_SUBSYSTEM_VENDOR_ID, 2))= ); + subsystem_vendor_id)); } =20 - _FDT(fdt_setprop_cell(fdt, offset, "cache-line-size", - pci_default_read_config(dev, PCI_CACHE_LINE_SIZE, 1))); + _FDT(fdt_setprop_cell(fdt, offset, "cache-line-size", cache_line_size)= ); + =20 /* the following fdt cells are masked off the pci status register */ - pci_status =3D pci_default_read_config(dev, PCI_STATUS, 2); _FDT(fdt_setprop_cell(fdt, offset, "devsel-speed", PCI_STATUS_DEVSEL_MASK & pci_status)); =20 @@ -1283,9 +1301,9 @@ static void spapr_populate_pci_child_dt(PCIDevice *de= v, void *fdt, int offset, _FDT(fdt_setprop(fdt, offset, "udf-supported", NULL, 0)); } =20 - buf =3D spapr_phb_get_loc_code(sphb, dev); - _FDT(fdt_setprop_string(fdt, offset, "ibm,loc-code", buf)); - g_free(buf); + loc_code =3D spapr_phb_get_loc_code(sphb, dev); + _FDT(fdt_setprop_string(fdt, offset, "ibm,loc-code", loc_code)); + g_free(loc_code); =20 if (drc_index) { _FDT(fdt_setprop_cell(fdt, offset, "ibm,my-drc-index", drc_index)); @@ -1297,13 +1315,13 @@ static void spapr_populate_pci_child_dt(PCIDevice *= dev, void *fdt, int offset, RESOURCE_CELLS_SIZE)); =20 if (msi_present(dev)) { - max_msi =3D msi_nr_vectors_allocated(dev); + uint32_t max_msi =3D msi_nr_vectors_allocated(dev); if (max_msi) { _FDT(fdt_setprop_cell(fdt, offset, "ibm,req#msi", max_msi)); } } if (msix_present(dev)) { - max_msix =3D dev->msix_entries_nr; + uint32_t max_msix =3D dev->msix_entries_nr; if (max_msix) { _FDT(fdt_setprop_cell(fdt, offset, "ibm,req#msi-x", max_msix)); } @@ -1319,33 +1337,6 @@ static void spapr_populate_pci_child_dt(PCIDevice *d= ev, void *fdt, int offset, } =20 spapr_phb_nvgpu_populate_pcidev_dt(dev, fdt, offset, sphb); -} - -/* create OF node for pci device and required OF DT properties */ -static int spapr_create_pci_child_dt(SpaprPhbState *phb, PCIDevice *dev, - void *fdt, int node_offset) -{ - int offset; - const gchar *basename; - gchar *nodename; - int slot =3D PCI_SLOT(dev->devfn); - int func =3D PCI_FUNC(dev->devfn); - uint32_t ccode =3D pci_default_read_config(dev, PCI_CLASS_PROG, 3); - - basename =3D dt_name_from_class((ccode >> 16) & 0xff, (ccode >> 8) & 0= xff, - ccode & 0xff); - - if (func !=3D 0) { - nodename =3D g_strdup_printf("%s@%x,%x", basename, slot, func); - } else { - nodename =3D g_strdup_printf("%s@%x", basename, slot); - } - - _FDT(offset =3D fdt_add_subnode(fdt, node_offset, nodename)); - - g_free(nodename); - - spapr_populate_pci_child_dt(dev, fdt, offset, phb); =20 return offset; } @@ -1393,7 +1384,7 @@ int spapr_pci_dt_populate(SpaprDrc *drc, SpaprMachine= State *spapr, SpaprPhbState *sphb =3D SPAPR_PCI_HOST_BRIDGE(plug_handler); PCIDevice *pdev =3D PCI_DEVICE(drc->dev); =20 - *fdt_start_offset =3D spapr_create_pci_child_dt(sphb, pdev, fdt, 0); + *fdt_start_offset =3D spapr_dt_pci_device(sphb, pdev, fdt, 0); return 0; } =20 @@ -2080,7 +2071,7 @@ static void spapr_populate_pci_devices_dt(PCIBus *bus= , PCIDevice *pdev, int offset; SpaprFdt s_fdt; =20 - offset =3D spapr_create_pci_child_dt(p->sphb, pdev, p->fdt, p->node_of= f); + offset =3D spapr_dt_pci_device(p->sphb, pdev, p->fdt, p->node_off); if (!offset) { error_report("Failed to create pci child device tree node"); return; --=20 2.21.0