[libvirt] [PATCH 4/5] nodedev: add drm capability
marcandre.lureau at redhat.com
marcandre.lureau at redhat.com
Tue Feb 14 21:04:12 UTC 2017
From: Marc-André Lureau <marcandre.lureau at redhat.com>
Add a new 'drm' capability for Direct Rendering Manager (DRM) devices,
providing device type information.
Teach the udev backend to populate those devices.
Signed-off-by: Marc-André Lureau <marcandre.lureau at redhat.com>
---
docs/formatnode.html.in | 10 +++++++
docs/schemas/nodedev.rng | 14 ++++++++++
src/conf/node_device_conf.c | 44 +++++++++++++++++++++++++++++-
src/conf/node_device_conf.h | 15 ++++++++++
src/node_device/node_device_driver.c | 1 +
src/node_device/node_device_udev.c | 41 ++++++++++++++++++++++++++++
tests/nodedevschemadata/drm_renderD129.xml | 10 +++++++
tests/nodedevxml2xmltest.c | 1 +
8 files changed, 135 insertions(+), 1 deletion(-)
create mode 100644 tests/nodedevschemadata/drm_renderD129.xml
diff --git a/docs/formatnode.html.in b/docs/formatnode.html.in
index ecdd1dbcb..a368ffc07 100644
--- a/docs/formatnode.html.in
+++ b/docs/formatnode.html.in
@@ -314,6 +314,16 @@
and <code>media_label</code>.</dd>
</dl>
</dd>
+ <dt><code>drm</code></dt>
+ <dd>Describes a Direct Rendering Manager (DRM) device.
+ Sub-elements include:
+ <dl>
+ <dt><code>type</code></dt>
+ <dd>The type of DRM device. Could be
+ <code>primary</code>, <code>control</code> or
+ <code>render</code>.</dd>
+ </dl>
+ </dd>
</dl>
</dd>
</dl>
diff --git a/docs/schemas/nodedev.rng b/docs/schemas/nodedev.rng
index 62e29b6cc..0f90a73c8 100644
--- a/docs/schemas/nodedev.rng
+++ b/docs/schemas/nodedev.rng
@@ -82,6 +82,7 @@
<ref name="capscsitarget"/>
<ref name="capscsi"/>
<ref name="capstorage"/>
+ <ref name="capdrm"/>
</choice>
</element>
</define>
@@ -540,6 +541,19 @@
</element>
</define>
+ <define name='capdrm'>
+ <attribute name='type'>
+ <value>drm</value>
+ </attribute>
+ <element name='type'>
+ <choice>
+ <value>primary</value>
+ <value>control</value>
+ <value>render</value>
+ </choice>
+ </element>
+ </define>
+
<define name='address'>
<element name='address'>
<attribute name='domain'><ref name='hexuint'/></attribute>
diff --git a/src/conf/node_device_conf.c b/src/conf/node_device_conf.c
index 0d1dafcd6..04b63cc93 100644
--- a/src/conf/node_device_conf.c
+++ b/src/conf/node_device_conf.c
@@ -56,12 +56,18 @@ VIR_ENUM_IMPL(virNodeDevCap, VIR_NODE_DEV_CAP_LAST,
"storage",
"fc_host",
"vports",
- "scsi_generic")
+ "scsi_generic",
+ "drm")
VIR_ENUM_IMPL(virNodeDevNetCap, VIR_NODE_DEV_CAP_NET_LAST,
"80203",
"80211")
+VIR_ENUM_IMPL(virNodeDevDRM, VIR_NODE_DEV_DRM_LAST,
+ "primary",
+ "control",
+ "render")
+
static int
virNodeDevCapsDefParseString(const char *xpath,
xmlXPathContextPtr ctxt,
@@ -698,6 +704,9 @@ char *virNodeDeviceDefFormat(const virNodeDeviceDef *def)
virBufferEscapeString(&buf, "<char>%s</char>\n",
data->sg.path);
break;
+ case VIR_NODE_DEV_CAP_DRM:
+ virBufferEscapeString(&buf, "<type>%s</type>\n", virNodeDevDRMTypeToString(data->drm.type));
+ break;
case VIR_NODE_DEV_CAP_FC_HOST:
case VIR_NODE_DEV_CAP_VPORTS:
case VIR_NODE_DEV_CAP_LAST:
@@ -799,6 +808,35 @@ virNodeDevCapsDefParseULongLong(const char *xpath,
}
static int
+virNodeDevCapDRMParseXML(xmlXPathContextPtr ctxt,
+ virNodeDeviceDefPtr def,
+ xmlNodePtr node,
+ virNodeDevCapDataPtr data)
+{
+ xmlNodePtr orignode;
+ int ret = -1;
+ char *type = NULL;
+
+ orignode = ctxt->node;
+ ctxt->node = node;
+
+ type = virXPathString("string(./type[1])", ctxt);
+
+ if ((data->drm.type = virNodeDevDRMTypeFromString(type)) < 0) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("unknown drm type '%s' for '%s'"), type, def->name);
+ goto out;
+ }
+
+ ret = 0;
+
+out:
+ VIR_FREE(type);
+ ctxt->node = orignode;
+ return ret;
+}
+
+static int
virNodeDevCapStorageParseXML(xmlXPathContextPtr ctxt,
virNodeDeviceDefPtr def,
xmlNodePtr node,
@@ -1689,6 +1727,9 @@ virNodeDevCapsDefParseXML(xmlXPathContextPtr ctxt,
case VIR_NODE_DEV_CAP_STORAGE:
ret = virNodeDevCapStorageParseXML(ctxt, def, node, &caps->data);
break;
+ case VIR_NODE_DEV_CAP_DRM:
+ ret = virNodeDevCapDRMParseXML(ctxt, def, node, &caps->data);
+ break;
case VIR_NODE_DEV_CAP_FC_HOST:
case VIR_NODE_DEV_CAP_VPORTS:
case VIR_NODE_DEV_CAP_SCSI_GENERIC:
@@ -2116,6 +2157,7 @@ void virNodeDevCapsDefFree(virNodeDevCapsDefPtr caps)
case VIR_NODE_DEV_CAP_SCSI_GENERIC:
VIR_FREE(data->sg.path);
break;
+ case VIR_NODE_DEV_CAP_DRM:
case VIR_NODE_DEV_CAP_FC_HOST:
case VIR_NODE_DEV_CAP_VPORTS:
case VIR_NODE_DEV_CAP_LAST:
diff --git a/src/conf/node_device_conf.h b/src/conf/node_device_conf.h
index f46e9841a..be7e0e003 100644
--- a/src/conf/node_device_conf.h
+++ b/src/conf/node_device_conf.h
@@ -62,6 +62,7 @@ typedef enum {
VIR_NODE_DEV_CAP_FC_HOST, /* FC Host Bus Adapter */
VIR_NODE_DEV_CAP_VPORTS, /* HBA which is capable of vports */
VIR_NODE_DEV_CAP_SCSI_GENERIC, /* SCSI generic device */
+ VIR_NODE_DEV_CAP_DRM, /* DRM device */
VIR_NODE_DEV_CAP_LAST
} virNodeDevCapType;
@@ -93,6 +94,17 @@ typedef enum {
VIR_NODE_DEV_CAP_FLAG_PCIE = (1 << 2),
} virNodeDevPCICapFlags;
+typedef enum {
+ /* Keep in sync with VIR_ENUM_IMPL in node_device_conf.c */
+ VIR_NODE_DEV_DRM_PRIMARY,
+ VIR_NODE_DEV_DRM_CONTROL,
+ VIR_NODE_DEV_DRM_RENDER,
+
+ VIR_NODE_DEV_DRM_LAST
+} virNodeDevDRMType;
+
+VIR_ENUM_DECL(virNodeDevDRM)
+
typedef struct _virNodeDevCapData {
virNodeDevCapType type;
union {
@@ -192,6 +204,9 @@ typedef struct _virNodeDevCapData {
struct {
char *path;
} sg; /* SCSI generic device */
+ struct {
+ virNodeDevDRMType type;
+ } drm;
};
} virNodeDevCapData, *virNodeDevCapDataPtr;
diff --git a/src/node_device/node_device_driver.c b/src/node_device/node_device_driver.c
index 5238e231d..d04713f5e 100644
--- a/src/node_device/node_device_driver.c
+++ b/src/node_device/node_device_driver.c
@@ -72,6 +72,7 @@ static int update_caps(virNodeDeviceObjPtr dev)
/* all types that (supposedly) don't require any updates
* relative to what's in the cache.
*/
+ case VIR_NODE_DEV_CAP_DRM:
case VIR_NODE_DEV_CAP_SYSTEM:
case VIR_NODE_DEV_CAP_USB_DEV:
case VIR_NODE_DEV_CAP_USB_INTERFACE:
diff --git a/src/node_device/node_device_udev.c b/src/node_device/node_device_udev.c
index d7658410a..6a91e0722 100644
--- a/src/node_device/node_device_udev.c
+++ b/src/node_device/node_device_udev.c
@@ -410,6 +410,42 @@ static int udevProcessPCI(struct udev_device *device,
return ret;
}
+static int drmGetMinorType(int minor)
+{
+ int type = minor >> 6;
+
+ if (minor < 0)
+ return -1;
+
+ switch (type) {
+ case VIR_NODE_DEV_DRM_PRIMARY:
+ case VIR_NODE_DEV_DRM_CONTROL:
+ case VIR_NODE_DEV_DRM_RENDER:
+ return type;
+ default:
+ return -1;
+ }
+}
+
+static int udevProcessDRMDevice(struct udev_device *device,
+ virNodeDeviceDefPtr def)
+{
+ virNodeDevCapDataPtr data = &def->caps->data;
+ int minor;
+
+ if (udevGenerateDeviceName(device, def, NULL) != 0)
+ return -1;
+
+ if (udevGetIntProperty(device, "MINOR", &minor, 10) < 0)
+ return -1;
+
+ if ((minor = drmGetMinorType(minor)) == -1)
+ return -1;
+
+ data->drm.type = minor;
+
+ return 0;
+}
static int udevProcessUSBDevice(struct udev_device *device,
virNodeDeviceDefPtr def)
@@ -971,6 +1007,8 @@ udevGetDeviceType(struct udev_device *device,
*type = VIR_NODE_DEV_CAP_STORAGE;
else if (STREQ(devtype, "wlan"))
*type = VIR_NODE_DEV_CAP_NET;
+ else if (STREQ(devtype, "drm_minor"))
+ *type = VIR_NODE_DEV_CAP_DRM;
} else {
/* PCI devices don't set the DEVTYPE property. */
if (udevHasDeviceProperty(device, "PCI_CLASS"))
@@ -1039,6 +1077,9 @@ static int udevGetDeviceDetails(struct udev_device *device,
case VIR_NODE_DEV_CAP_SCSI_GENERIC:
ret = udevProcessSCSIGeneric(device, def);
break;
+ case VIR_NODE_DEV_CAP_DRM:
+ ret = udevProcessDRMDevice(device, def);
+ break;
default:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unknown device type %d"), def->caps->data.type);
diff --git a/tests/nodedevschemadata/drm_renderD129.xml b/tests/nodedevschemadata/drm_renderD129.xml
new file mode 100644
index 000000000..161481624
--- /dev/null
+++ b/tests/nodedevschemadata/drm_renderD129.xml
@@ -0,0 +1,10 @@
+<device>
+ <name>drm_renderD129</name>
+ <path>/sys/devices/pci0000:00/0000:00:02.0/drm/renderD129</path>
+ <devnode type='dev'>/dev/dri/renderD129</devnode>
+ <devnode type='link'>/dev/dri/by-path/pci-0000:00:02.0-render</devnode>
+ <parent>pci_0000_00_02_0</parent>
+ <capability type='drm'>
+ <type>render</type>
+ </capability>
+</device>
diff --git a/tests/nodedevxml2xmltest.c b/tests/nodedevxml2xmltest.c
index ec96943cb..5e1ae170c 100644
--- a/tests/nodedevxml2xmltest.c
+++ b/tests/nodedevxml2xmltest.c
@@ -100,6 +100,7 @@ mymain(void)
DO_TEST("pci_0000_02_10_7_sriov_zero_vfs_max_count");
DO_TEST("pci_0000_02_10_7_sriov_pf_vfs_all");
DO_TEST("pci_0000_02_10_7_sriov_pf_vfs_all_header_type");
+ DO_TEST("drm_renderD129");
return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
--
2.11.0.295.gd7dffce1c.dirty
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