diff options
author | Nikunj A Dadhania <nikunj@linux.vnet.ibm.com> | 2015-07-02 16:23:22 +1000 |
---|---|---|
committer | Alexander Graf <agraf@suse.de> | 2015-07-07 17:44:53 +0200 |
commit | 16b0ea1d852873cf17630133d86df6a68e23f38c (patch) | |
tree | 8d02aa3490f4f5e171b0d4559b0acae6ce2e2c37 /hw | |
parent | 1d2d974244c6f1629ca83f1de293eaa557634627 (diff) |
spapr_pci: populate ibm,loc-code
Each hardware instance has a platform unique location code. The OF
device tree that describes a part of a hardware entity must include
the “ibm,loc-code” property with a value that represents the location
code for that hardware entity.
Populate ibm,loc-code.
1) PCI passthru devices need to identify with its own ibm,loc-code
available on the host. In failure cases use:
vfio_<name>:<phb-index>:<bus>:<slot>.<fn>
2) Emulated devices encode as following:
qemu_<name>:<phb-index>:<bus>:<slot>.<fn>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'hw')
-rw-r--r-- | hw/ppc/spapr_pci.c | 77 |
1 files changed, 71 insertions, 6 deletions
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c index 7c3621cab4..75859836bc 100644 --- a/hw/ppc/spapr_pci.c +++ b/hw/ppc/spapr_pci.c @@ -747,6 +747,60 @@ static AddressSpace *spapr_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn) return &phb->iommu_as; } +static char *spapr_phb_vfio_get_loc_code(sPAPRPHBState *sphb, PCIDevice *pdev) +{ + char *path = NULL, *buf = NULL, *host = NULL; + + /* Get the PCI VFIO host id */ + host = object_property_get_str(OBJECT(pdev), "host", NULL); + if (!host) { + goto err_out; + } + + /* Construct the path of the file that will give us the DT location */ + path = g_strdup_printf("/sys/bus/pci/devices/%s/devspec", host); + g_free(host); + if (!path || !g_file_get_contents(path, &buf, NULL, NULL)) { + goto err_out; + } + g_free(path); + + /* Construct and read from host device tree the loc-code */ + path = g_strdup_printf("/proc/device-tree%s/ibm,loc-code", buf); + g_free(buf); + if (!path || !g_file_get_contents(path, &buf, NULL, NULL)) { + goto err_out; + } + return buf; + +err_out: + g_free(path); + return NULL; +} + +static char *spapr_phb_get_loc_code(sPAPRPHBState *sphb, PCIDevice *pdev) +{ + char *buf; + const char *devtype = "qemu"; + uint32_t busnr = pci_bus_num(PCI_BUS(qdev_get_parent_bus(DEVICE(pdev)))); + + if (object_dynamic_cast(OBJECT(pdev), "vfio-pci")) { + buf = spapr_phb_vfio_get_loc_code(sphb, pdev); + if (buf) { + return buf; + } + devtype = "vfio"; + } + /* + * For emulated devices and VFIO-failure case, make up + * the loc-code. + */ + buf = g_strdup_printf("%s_%s:%04x:%02x:%02x.%x", + devtype, pdev->name, sphb->index, busnr, + PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); + return buf; +} + /* Macros to operate with address in OF binding to PCI */ #define b_x(x, p, l) (((x) & ((1<<(l))-1)) << (p)) #define b_n(x) b_x((x), 31, 1) /* 0 if relocatable */ @@ -885,11 +939,12 @@ static void populate_resource_props(PCIDevice *d, ResourceProps *rp) static int spapr_populate_pci_child_dt(PCIDevice *dev, void *fdt, int offset, int phb_index, int drc_index, - const char *drc_name) + sPAPRPHBState *sphb) { ResourceProps rp; bool is_bridge = false; - int pci_status; + int pci_status, err; + char *buf = NULL; if (pci_default_read_config(dev, PCI_HEADER_TYPE, 1) == PCI_HEADER_TYPE_BRIDGE) { @@ -950,7 +1005,18 @@ static int spapr_populate_pci_child_dt(PCIDevice *dev, void *fdt, int offset, * processed by OF beforehand */ _FDT(fdt_setprop_string(fdt, offset, "name", "pci")); - _FDT(fdt_setprop(fdt, offset, "ibm,loc-code", drc_name, strlen(drc_name))); + buf = spapr_phb_get_loc_code(sphb, dev); + if (!buf) { + error_report("Failed setting the ibm,loc-code"); + return -1; + } + + err = fdt_setprop_string(fdt, offset, "ibm,loc-code", buf); + g_free(buf); + if (err < 0) { + return err; + } + _FDT(fdt_setprop_cell(fdt, offset, "ibm,my-drc-index", drc_index)); _FDT(fdt_setprop_cell(fdt, offset, "#address-cells", @@ -988,7 +1054,7 @@ static int spapr_create_pci_child_dt(sPAPRPHBState *phb, PCIDevice *dev, } offset = fdt_add_subnode(fdt, node_offset, nodename); ret = spapr_populate_pci_child_dt(dev, fdt, offset, phb->index, drc_index, - drc_name); + phb); g_assert(!ret); if (ret) { return 0; @@ -1004,14 +1070,13 @@ static void spapr_phb_add_pci_device(sPAPRDRConnector *drc, sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); DeviceState *dev = DEVICE(pdev); int drc_index = drck->get_index(drc); - const char *drc_name = drck->get_name(drc); void *fdt = NULL; int fdt_start_offset = 0, fdt_size; if (dev->hotplugged) { fdt = create_device_tree(&fdt_size); fdt_start_offset = spapr_create_pci_child_dt(phb, pdev, - drc_index, drc_name, + drc_index, NULL, fdt, 0); if (!fdt_start_offset) { error_setg(errp, "Failed to create pci child device tree node"); |