From patchwork Thu Jun 6 08:48:47 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Gibson X-Patchwork-Id: 249331 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id B61602C0090 for ; Thu, 6 Jun 2013 18:55:19 +1000 (EST) Received: from localhost ([::1]:34286 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UkVyX-00077r-Kg for incoming@patchwork.ozlabs.org; Thu, 06 Jun 2013 04:55:17 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45604) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UkVsh-0006VE-0v for qemu-devel@nongnu.org; Thu, 06 Jun 2013 04:49:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UkVsT-0000pK-4u for qemu-devel@nongnu.org; Thu, 06 Jun 2013 04:49:14 -0400 Received: from ozlabs.org ([2402:b800:7003:1:1::1]:33733) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UkVsR-0000nq-Jx for qemu-devel@nongnu.org; Thu, 06 Jun 2013 04:49:01 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id B6E4F2C00AD; Thu, 6 Jun 2013 18:48:57 +1000 (EST) From: David Gibson To: aliguori@us.ibm.com, mst@redhat.com Date: Thu, 6 Jun 2013 18:48:47 +1000 Message-Id: <1370508534-12335-4-git-send-email-david@gibson.dropbear.id.au> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1370508534-12335-1-git-send-email-david@gibson.dropbear.id.au> References: <1370508534-12335-1-git-send-email-david@gibson.dropbear.id.au> X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2402:b800:7003:1:1::1 Cc: bonzini@redhat.com, qemu-devel@nongnu.org, David Gibson Subject: [Qemu-devel] [PATCH 03/10] pci: Abolish pci_find_root_bus() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org pci_find_root_bus() takes a domain parameter. Currently PCI root buses with domain other than 0 can't be created, so this is more or less a long winded way of retrieving the main PCI root bus. Numbered domains don't actually properly cover the (non x86) possibilities for multiple PCI root buses, so this patch for now enforces the domain == 0 restriction in other places to replace pci_find_root_bus() with an explicit pci_find_primary_bus(). Signed-off-by: David Gibson --- hw/pci/pci-hotplug-old.c | 34 +++++++++++++++++++++++++--------- hw/pci/pci.c | 19 +++++++++++++++---- include/hw/pci/pci.h | 2 +- 3 files changed, 41 insertions(+), 14 deletions(-) diff --git a/hw/pci/pci-hotplug-old.c b/hw/pci/pci-hotplug-old.c index a0b5558..7a47d6b 100644 --- a/hw/pci/pci-hotplug-old.c +++ b/hw/pci/pci-hotplug-old.c @@ -36,17 +36,23 @@ #include "sysemu/blockdev.h" #include "qapi/error.h" -static int pci_read_devaddr(Monitor *mon, const char *addr, int *domp, +static int pci_read_devaddr(Monitor *mon, const char *addr, int *busp, unsigned *slotp) { + int dom; + /* strip legacy tag */ if (!strncmp(addr, "pci_addr=", 9)) { addr += 9; } - if (pci_parse_devaddr(addr, domp, busp, slotp, NULL)) { + if (pci_parse_devaddr(addr, &dom, busp, slotp, NULL)) { monitor_printf(mon, "Invalid pci address\n"); return -1; } + if (dom != 0) { + monitor_printf(mon, "Multiple PCI domains not supported, use device_add\n"); + return -1; + } return 0; } @@ -128,18 +134,22 @@ static int scsi_hot_add(Monitor *mon, DeviceState *adapter, int pci_drive_hot_add(Monitor *mon, const QDict *qdict, DriveInfo *dinfo) { - int dom, pci_bus; + int pci_bus; unsigned slot; + PCIBus *root = pci_find_primary_bus(); PCIDevice *dev; const char *pci_addr = qdict_get_str(qdict, "pci_addr"); switch (dinfo->type) { case IF_SCSI: - if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) { + if (!root) { + monitor_printf(mon, "no primary PCI bus\n"); + goto err; + } + if (pci_read_devaddr(mon, pci_addr, &pci_bus, &slot)) { goto err; } - dev = pci_find_device(pci_find_root_bus(dom), pci_bus, - PCI_DEVFN(slot, 0)); + dev = pci_find_device(root, pci_bus, PCI_DEVFN(slot, 0)); if (!dev) { monitor_printf(mon, "no pci device with address %s\n", pci_addr); goto err; @@ -275,16 +285,22 @@ void pci_device_hot_add(Monitor *mon, const QDict *qdict) static int pci_device_hot_remove(Monitor *mon, const char *pci_addr) { + PCIBus *root = pci_find_primary_bus(); PCIDevice *d; - int dom, bus; + int bus; unsigned slot; Error *local_err = NULL; - if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) { + if (!root) { + monitor_printf(mon, "no primary PCI bus\n"); + return -1; + } + + if (pci_read_devaddr(mon, pci_addr, &bus, &slot)) { return -1; } - d = pci_find_device(pci_find_root_bus(dom), bus, PCI_DEVFN(slot, 0)); + d = pci_find_device(root, bus, PCI_DEVFN(slot, 0)); if (!d) { monitor_printf(mon, "slot %d empty\n", slot); return -1; diff --git a/hw/pci/pci.c b/hw/pci/pci.c index f0005c6..80b0d7e 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -246,12 +246,12 @@ static void pci_host_bus_register(int domain, PCIBus *bus) QLIST_INSERT_HEAD(&host_buses, host, next); } -PCIBus *pci_find_root_bus(int domain) +PCIBus *pci_find_primary_bus(void) { struct PCIHostBus *host; QLIST_FOREACH(host, &host_buses, next) { - if (host->domain == domain) { + if (host->domain == 0) { return host->bus; } } @@ -583,20 +583,31 @@ int pci_parse_devaddr(const char *addr, int *domp, int *busp, PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr) { + PCIBus *root = pci_find_primary_bus(); int dom, bus; unsigned slot; + if (!root) { + fprintf(stderr, "No primary PCI bus\n"); + return NULL; + } + if (!devaddr) { *devfnp = -1; - return pci_find_bus_nr(pci_find_root_bus(0), 0); + return pci_find_bus_nr(root, 0); } if (pci_parse_devaddr(devaddr, &dom, &bus, &slot, NULL) < 0) { return NULL; } + if (dom != 0) { + fprintf(stderr, "No support for non-zero PCI domains\n"); + return NULL; + } + *devfnp = PCI_DEVFN(slot, 0); - return pci_find_bus_nr(pci_find_root_bus(dom), bus); + return pci_find_bus_nr(root, bus); } static void pci_init_cmask(PCIDevice *dev) diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index 3ef2ee1..c26d704 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -390,7 +390,7 @@ int pci_bus_num(PCIBus *s); void pci_for_each_device(PCIBus *bus, int bus_num, void (*fn)(PCIBus *bus, PCIDevice *d, void *opaque), void *opaque); -PCIBus *pci_find_root_bus(int domain); +PCIBus *pci_find_primary_bus(void); int pci_find_domain(const PCIBus *bus); PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn); int pci_qdev_find_device(const char *id, PCIDevice **pdev);