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@@ -38,6 +38,16 @@
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#include "storvsc_api.h"
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+static const char *g_driver_name = "storvsc";
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+
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+/* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */
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+static const struct hv_guid gStorVscDeviceType = {
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+ .data = {
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+ 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d,
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+ 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f
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+ }
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+};
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+
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struct host_device_context {
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/* must be 1st field
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* FIXME this is a bug */
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@@ -64,6 +74,59 @@ struct storvsc_cmd_request {
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};
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+/*
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+ * stor_vsc_initialize - Main entry point
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+ */
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+int stor_vsc_initialize(struct hv_driver *driver)
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+{
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+ struct storvsc_driver_object *stor_driver;
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+
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+ stor_driver = (struct storvsc_driver_object *)driver;
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+
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+ DPRINT_DBG(STORVSC, "sizeof(STORVSC_REQUEST)=%zd "
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+ "sizeof(struct storvsc_request_extension)=%zd "
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+ "sizeof(struct vstor_packet)=%zd, "
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+ "sizeof(struct vmscsi_request)=%zd",
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+ sizeof(struct hv_storvsc_request),
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+ sizeof(struct storvsc_request_extension),
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+ sizeof(struct vstor_packet),
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+ sizeof(struct vmscsi_request));
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+
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+ /* Make sure we are at least 2 pages since 1 page is used for control */
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+
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+ driver->name = g_driver_name;
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+ memcpy(&driver->dev_type, &gStorVscDeviceType,
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+ sizeof(struct hv_guid));
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+
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+ stor_driver->request_ext_size =
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+ sizeof(struct storvsc_request_extension);
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+
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+ /*
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+ * Divide the ring buffer data size (which is 1 page less
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+ * than the ring buffer size since that page is reserved for
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+ * the ring buffer indices) by the max request size (which is
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+ * vmbus_channel_packet_multipage_buffer + struct vstor_packet + u64)
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+ */
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+ stor_driver->max_outstanding_req_per_channel =
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+ ((stor_driver->ring_buffer_size - PAGE_SIZE) /
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+ ALIGN(MAX_MULTIPAGE_BUFFER_PACKET +
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+ sizeof(struct vstor_packet) + sizeof(u64),
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+ sizeof(u64)));
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+
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+ DPRINT_INFO(STORVSC, "max io %u, currently %u\n",
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+ stor_driver->max_outstanding_req_per_channel,
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+ STORVSC_MAX_IO_REQUESTS);
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+
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+ /* Setup the dispatch table */
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+ stor_driver->base.dev_add = stor_vsc_on_device_add;
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+ stor_driver->base.dev_rm = stor_vsc_on_device_remove;
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+ stor_driver->base.cleanup = stor_vsc_on_cleanup;
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+
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+ stor_driver->on_io_request = stor_vsc_on_io_request;
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+
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+ return 0;
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+}
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+
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/* Static decl */
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static int storvsc_probe(struct device *dev);
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static int storvsc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scmnd);
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