[PATCH 10/59] Staging: hv: util: Make hv_utils a vmbus device driver

K. Y. Srinivasan
2011-08-25T17:03:49Z

In preperation for supporting auto-loading the util driver, make
the util driver a vmbus driver.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
---
drivers/staging/hv/hv_util.c | 64 +++++++++++++++++++++++++++++++++++++++++-
1 files changed, 63 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/hv/hv_util.c b/drivers/staging/hv/hv_util.c
index c164b54..a620f4d 100644
--- a/drivers/staging/hv/hv_util.c
+++ b/drivers/staging/hv/hv_util.c
@@ -36,6 +36,8 @@ static u8 *shut_txf_buf;
static u8 *time_txf_buf;
static u8 *hbeat_txf_buf;

+static const char *driver_name = "hv_util";
+
static void shutdown_onchannelcallback(void *context)
{
struct vmbus_channel *channel = context;
@@ -210,6 +212,63 @@ static void heartbeat_onchannelcallback(void *context)
}
}

+/*
+ * The devices managed by the util driver don't need any additional
+ * setup.
+ */
+static int util_probe(struct hv_device *dev)
+{
+ return 0;
+}
+
+static int util_remove(struct hv_device *dev)
+{
+ return 0;
+}
+
+static const struct hv_vmbus_device_id id_table[] = {
+ {
+ /* Shutdown guid */
+ .guid = {
+ 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49,
+ 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB
+ }
+ },
+ {
+ /* Time synch guid */
+ .guid = {
+ 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49,
+ 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf
+ }
+ },
+ {
+ /* Heartbeat guid */
+ .guid = {
+ 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e,
+ 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d
+ }
+ },
+ {
+ /* KVP guid */
+ .guid = {
+ 0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d,
+ 0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x3, 0xe6
+ }
+ },
+ {
+ .guid = { }
+ },
+};
+
+MODULE_DEVICE_TABLE(vmbus, id_table);
+
+/* The one and only one */
+static struct hv_driver util_drv = {
+ .id_table = id_table,
+ .probe = util_probe,
+ .remove = util_remove,
+};
+
static const struct pci_device_id __initconst
hv_utils_pci_table[] __maybe_unused = {
{ PCI_DEVICE(0x1414, 0x5353) }, /* Hyper-V emulated VGA controller */
@@ -264,7 +323,9 @@ static int __init init_hyperv_utils(void)

hv_cb_utils[HV_KVP_MSG].callback = &hv_kvp_onchannelcallback;

- return 0;
+ util_drv.driver.name = driver_name;
+
+ return vmbus_child_driver_register(&util_drv.driver);
}

static void exit_hyperv_utils(void)
@@ -296,6 +357,7 @@ static void exit_hyperv_utils(void)
kfree(shut_txf_buf);
kfree(time_txf_buf);
kfree(hbeat_txf_buf);
+ vmbus_child_driver_unregister(&util_drv.driver);
}

module_init(init_hyperv_utils);
--
1.7.4.1