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From 1e726d2e4db2132cb5f0ee985745c87174e6f599 Mon Sep 17 00:00:00 2001
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Message-Id: <1e726d2e4db2132cb5f0ee985745c87174e6f599.1387298827.git.minovotn@redhat.com>
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In-Reply-To: <3ed0fb61a3dc912ef036d7ef450bed192090709e.1387298827.git.minovotn@redhat.com>
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References: <3ed0fb61a3dc912ef036d7ef450bed192090709e.1387298827.git.minovotn@redhat.com>
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From: "Michael S. Tsirkin" <mst@redhat.com>
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Date: Tue, 17 Dec 2013 15:17:05 +0100
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Subject: [PATCH 07/56] pci: add helper to retrieve the 64-bit range
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RH-Author: Michael S. Tsirkin <mst@redhat.com>
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Message-id: <1387293161-4085-8-git-send-email-mst@redhat.com>
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Patchwork-id: 56312
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O-Subject: [PATCH qemu-kvm RHEL7.0 v2 07/57] pci: add helper to retrieve the 64-bit range
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Bugzilla: 1034876
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RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
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RH-Acked-by: Marcel Apfelbaum <marcel.a@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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(cherry picked from commit 438640695723f33be6d0081ac1e690aa40975c39)
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Conflicts:
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	include/hw/pci/pci.h
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---
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 include/hw/pci/pci.h |  1 +
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 hw/pci/pci.c         | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
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 2 files changed, 51 insertions(+)
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Signed-off-by: Michal Novotny <minovotn@redhat.com>
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---
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 hw/pci/pci.c         | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
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 include/hw/pci/pci.h |  1 +
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 2 files changed, 51 insertions(+)
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diff --git a/hw/pci/pci.c b/hw/pci/pci.c
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index 26995d7..d550851 100644
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--- a/hw/pci/pci.c
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+++ b/hw/pci/pci.c
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@@ -2244,6 +2244,56 @@ void pci_setup_iommu(PCIBus *bus, PCIDMAContextFunc fn, void *opaque)
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     bus->dma_context_opaque = opaque;
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 }
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+static void pci_dev_get_w64(PCIBus *b, PCIDevice *dev, void *opaque)
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+{
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+    Range *range = opaque;
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+    PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
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+    uint16_t cmd = pci_get_word(dev->config + PCI_COMMAND);
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+    int r;
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+
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+    if (!(cmd & PCI_COMMAND_MEMORY)) {
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+        return;
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+    }
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+
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+    if (pc->is_bridge) {
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+        pcibus_t base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
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+        pcibus_t limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
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+
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+        base = MAX(base, 0x1ULL << 32);
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+
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+        if (limit >= base) {
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+            Range pref_range;
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+            pref_range.begin = base;
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+            pref_range.end = limit + 1;
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+            range_extend(range, &pref_range);
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+        }
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+    }
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+    for (r = 0; r < PCI_NUM_REGIONS; ++r) {
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+        PCIIORegion *region = &dev->io_regions[r];
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+        Range region_range;
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+
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+        if (!region->size ||
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+            (region->type & PCI_BASE_ADDRESS_SPACE_IO) ||
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+            !(region->type & PCI_BASE_ADDRESS_MEM_TYPE_64)) {
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+            continue;
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+        }
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+        region_range.begin = pci_get_quad(dev->config + pci_bar(dev, r));
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+        region_range.end = region_range.begin + region->size;
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+
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+        region_range.begin = MAX(region_range.begin, 0x1ULL << 32);
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+
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+        if (region_range.end - 1 >= region_range.begin) {
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+            range_extend(range, ®ion_range);
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+        }
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+    }
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+}
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+
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+void pci_bus_get_w64_range(PCIBus *bus, Range *range)
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+{
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+    range->begin = range->end = 0;
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+    pci_for_each_device_under_bus(bus, pci_dev_get_w64, range);
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+}
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+
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 static const TypeInfo pci_device_type_info = {
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     .name = TYPE_PCI_DEVICE,
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     .parent = TYPE_DEVICE,
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diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
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index 8d075ab..e7760dd 100644
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--- a/include/hw/pci/pci.h
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+++ b/include/hw/pci/pci.h
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@@ -395,6 +395,7 @@ int pci_find_domain(const PCIBus *bus);
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 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn);
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 int pci_qdev_find_device(const char *id, PCIDevice **pdev);
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 PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr);
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+void pci_bus_get_w64_range(PCIBus *bus, Range *range);
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 int pci_read_devaddr(Monitor *mon, const char *addr, int *domp, int *busp,
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                      unsigned *slotp);
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-- 
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1.7.11.7
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