* Authors:
* Haiyang Zhang <haiyangz@microsoft.com>
* Hank Janssen <hjanssen@microsoft.com>
+ * K. Y. Srinivasan <kys@microsoft.com>
+ *
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/pci.h>
#include <linux/dmi.h>
#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <acpi/acpi_bus.h>
#include <linux/completion.h>
-#include "version_info.h"
-#include "hv_api.h"
-#include "logging.h"
-#include "vmbus.h"
-#include "channel.h"
-#include "vmbus_private.h"
-
-
-/* FIXME! We need to do this dynamically for PIC and APIC system */
-#define VMBUS_IRQ 0x5
-#define VMBUS_IRQ_VECTOR IRQ5_VECTOR
-
-/* Main vmbus driver data structure */
-struct vmbus_driver_context {
-
- struct bus_type bus;
- struct tasklet_struct msg_dpc;
- struct tasklet_struct event_dpc;
-
- /* The bus root device */
- struct hv_device device_ctx;
-};
-
-static int vmbus_match(struct device *device, struct device_driver *driver);
-static int vmbus_probe(struct device *device);
-static int vmbus_remove(struct device *device);
-static void vmbus_shutdown(struct device *device);
-static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env);
-static irqreturn_t vmbus_isr(int irq, void *dev_id);
+#include "hyperv.h"
+#include "hyperv_vmbus.h"
-static void vmbus_device_release(struct device *device);
-static void vmbus_bus_release(struct device *device);
-static ssize_t vmbus_show_device_attr(struct device *dev,
- struct device_attribute *dev_attr,
- char *buf);
+static struct pci_dev *hv_pci_dev;
+static struct tasklet_struct msg_dpc;
+static struct tasklet_struct event_dpc;
unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL);
EXPORT_SYMBOL(vmbus_loglevel);
/* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */
/* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */
-static int vmbus_irq = VMBUS_IRQ;
-
-/* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */
-static struct device_attribute vmbus_device_attrs[] = {
- __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL),
-
- __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL),
-
- __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL),
-
- __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
-
- __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
- __ATTR_NULL
-};
-
-/* The one and only one */
-static struct vmbus_driver_context vmbus_drv = {
- .bus.name = "vmbus",
- .bus.match = vmbus_match,
- .bus.shutdown = vmbus_shutdown,
- .bus.remove = vmbus_remove,
- .bus.probe = vmbus_probe,
- .bus.uevent = vmbus_uevent,
- .bus.dev_attrs = vmbus_device_attrs,
-};
-
-static const char *driver_name = "hyperv";
-
-/*
- * Windows vmbus does not defined this.
- * We defined this to be consistent with other devices
- */
-/* {c5295816-f63a-4d5f-8d1a-4daf999ca185} */
-static const struct hv_guid device_type = {
- .data = {
- 0x16, 0x58, 0x29, 0xc5, 0x3a, 0xf6, 0x5f, 0x4d,
- 0x8d, 0x1a, 0x4d, 0xaf, 0x99, 0x9c, 0xa1, 0x85
- }
-};
-
-/* {ac3760fc-9adf-40aa-9427-a70ed6de95c5} */
-static const struct hv_guid device_id = {
- .data = {
- 0xfc, 0x60, 0x37, 0xac, 0xdf, 0x9a, 0xaa, 0x40,
- 0x94, 0x27, 0xa7, 0x0e, 0xd6, 0xde, 0x95, 0xc5
- }
-};
-
-static struct hv_device *vmbus_device; /* vmbus root device */
-
-
-/*
- * vmbus_dev_add - Callback when the root bus device is added
- */
-static int vmbus_dev_add(struct hv_device *dev, void *info)
-{
- u32 *irqvector = info;
- int ret;
-
- vmbus_device = dev;
-
- memcpy(&vmbus_device->dev_type, &device_type, sizeof(struct hv_guid));
- memcpy(&vmbus_device->dev_instance, &device_id,
- sizeof(struct hv_guid));
-
- /* strcpy(dev->name, "vmbus"); */
- /* SynIC setup... */
- on_each_cpu(hv_synic_init, (void *)irqvector, 1);
-
- /* Connect to VMBus in the root partition */
- ret = vmbus_connect();
-
- /* VmbusSendEvent(device->localPortId+1); */
- return ret;
-}
-
-
-struct onmessage_work_context {
- struct work_struct work;
- struct hv_message msg;
-};
-
-static void vmbus_onmessage_work(struct work_struct *work)
-{
- struct onmessage_work_context *ctx;
-
- ctx = container_of(work, struct onmessage_work_context,
- work);
- vmbus_onmessage(&ctx->msg);
- kfree(ctx);
-}
-
-/*
- * vmbus_on_msg_dpc - DPC routine to handle messages from the hypervisior
- */
-static void vmbus_on_msg_dpc(unsigned long data)
-{
- int cpu = smp_processor_id();
- void *page_addr = hv_context.synic_message_page[cpu];
- struct hv_message *msg = (struct hv_message *)page_addr +
- VMBUS_MESSAGE_SINT;
- struct onmessage_work_context *ctx;
-
- while (1) {
- if (msg->header.message_type == HVMSG_NONE) {
- /* no msg */
- break;
- } else {
- ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC);
- if (ctx == NULL)
- continue;
- INIT_WORK(&ctx->work, vmbus_onmessage_work);
- memcpy(&ctx->msg, msg, sizeof(*msg));
- queue_work(vmbus_connection.work_queue, &ctx->work);
- }
-
- msg->header.message_type = HVMSG_NONE;
-
- /*
- * Make sure the write to MessageType (ie set to
- * HVMSG_NONE) happens before we read the
- * MessagePending and EOMing. Otherwise, the EOMing
- * will not deliver any more messages since there is
- * no empty slot
- */
- mb();
-
- if (msg->header.message_flags.msg_pending) {
- /*
- * This will cause message queue rescan to
- * possibly deliver another msg from the
- * hypervisor
- */
- wrmsrl(HV_X64_MSR_EOM, 0);
- }
- }
-}
-
-/*
- * vmbus_on_isr - ISR routine
- */
-static int vmbus_on_isr(void)
-{
- int ret = 0;
- int cpu = smp_processor_id();
- void *page_addr;
- struct hv_message *msg;
- union hv_synic_event_flags *event;
-
- page_addr = hv_context.synic_message_page[cpu];
- msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT;
-
- /* Check if there are actual msgs to be process */
- if (msg->header.message_type != HVMSG_NONE) {
- DPRINT_DBG(VMBUS, "received msg type %d size %d",
- msg->header.message_type,
- msg->header.payload_size);
- ret |= 0x1;
- }
-
- /* TODO: Check if there are events to be process */
- page_addr = hv_context.synic_event_page[cpu];
- event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT;
-
- /* Since we are a child, we only need to check bit 0 */
- if (sync_test_and_clear_bit(0, (unsigned long *) &event->flags32[0])) {
- DPRINT_DBG(VMBUS, "received event %d", event->flags32[0]);
- ret |= 0x2;
- }
-
- return ret;
-}
+static int pci_probe_error;
+static struct completion probe_event;
+static int irq;
static void get_channel_info(struct hv_device *device,
struct hv_device_info *info)
return sprintf(buf, "%d\n",
device_info.client_monitor_conn_id);
} else {
- return 0;
+ return 0;
+ }
+}
+
+/* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */
+static struct device_attribute vmbus_device_attrs[] = {
+ __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL),
+
+ __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL),
+
+ __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL),
+
+ __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
+
+ __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR_NULL
+};
+
+
+/*
+ * vmbus_uevent - add uevent for our device
+ *
+ * This routine is invoked when a device is added or removed on the vmbus to
+ * generate a uevent to udev in the userspace. The udev will then look at its
+ * rule and the uevent generated here to load the appropriate driver
+ */
+static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env)
+{
+ struct hv_device *dev = device_to_hv_device(device);
+ int ret;
+
+ ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={"
+ "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
+ "%02x%02x%02x%02x%02x%02x%02x%02x}",
+ dev->dev_type.data[3],
+ dev->dev_type.data[2],
+ dev->dev_type.data[1],
+ dev->dev_type.data[0],
+ dev->dev_type.data[5],
+ dev->dev_type.data[4],
+ dev->dev_type.data[7],
+ dev->dev_type.data[6],
+ dev->dev_type.data[8],
+ dev->dev_type.data[9],
+ dev->dev_type.data[10],
+ dev->dev_type.data[11],
+ dev->dev_type.data[12],
+ dev->dev_type.data[13],
+ dev->dev_type.data[14],
+ dev->dev_type.data[15]);
+
+ if (ret)
+ return ret;
+
+ ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={"
+ "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
+ "%02x%02x%02x%02x%02x%02x%02x%02x}",
+ dev->dev_instance.data[3],
+ dev->dev_instance.data[2],
+ dev->dev_instance.data[1],
+ dev->dev_instance.data[0],
+ dev->dev_instance.data[5],
+ dev->dev_instance.data[4],
+ dev->dev_instance.data[7],
+ dev->dev_instance.data[6],
+ dev->dev_instance.data[8],
+ dev->dev_instance.data[9],
+ dev->dev_instance.data[10],
+ dev->dev_instance.data[11],
+ dev->dev_instance.data[12],
+ dev->dev_instance.data[13],
+ dev->dev_instance.data[14],
+ dev->dev_instance.data[15]);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+
+/*
+ * vmbus_match - Attempt to match the specified device to the specified driver
+ */
+static int vmbus_match(struct device *device, struct device_driver *driver)
+{
+ int match = 0;
+ struct hv_driver *drv = drv_to_hv_drv(driver);
+ struct hv_device *device_ctx = device_to_hv_device(device);
+
+ /* We found our driver ? */
+ if (memcmp(&device_ctx->dev_type, &drv->dev_type,
+ sizeof(struct hv_guid)) == 0)
+ match = 1;
+
+ return match;
+}
+
+/*
+ * vmbus_probe - Add the new vmbus's child device
+ */
+static int vmbus_probe(struct device *child_device)
+{
+ int ret = 0;
+ struct hv_driver *drv =
+ drv_to_hv_drv(child_device->driver);
+ struct hv_device *dev = device_to_hv_device(child_device);
+
+ if (drv->probe) {
+ ret = drv->probe(dev);
+ if (ret != 0)
+ pr_err("probe failed for device %s (%d)\n",
+ dev_name(child_device), ret);
+
+ } else {
+ pr_err("probe not set for driver %s\n",
+ dev_name(child_device));
+ ret = -1;
+ }
+ return ret;
+}
+
+/*
+ * vmbus_remove - Remove a vmbus device
+ */
+static int vmbus_remove(struct device *child_device)
+{
+ int ret;
+ struct hv_driver *drv;
+
+ struct hv_device *dev = device_to_hv_device(child_device);
+
+ if (child_device->driver) {
+ drv = drv_to_hv_drv(child_device->driver);
+
+ if (drv->remove) {
+ ret = drv->remove(dev);
+ } else {
+ pr_err("remove not set for driver %s\n",
+ dev_name(child_device));
+ ret = -1;
+ }
+ }
+
+ return 0;
+}
+
+
+/*
+ * vmbus_shutdown - Shutdown a vmbus device
+ */
+static void vmbus_shutdown(struct device *child_device)
+{
+ struct hv_driver *drv;
+ struct hv_device *dev = device_to_hv_device(child_device);
+
+
+ /* The device may not be attached yet */
+ if (!child_device->driver)
+ return;
+
+ drv = drv_to_hv_drv(child_device->driver);
+
+ if (drv->shutdown)
+ drv->shutdown(dev);
+
+ return;
+}
+
+
+/*
+ * vmbus_device_release - Final callback release of the vmbus child device
+ */
+static void vmbus_device_release(struct device *device)
+{
+ struct hv_device *device_ctx = device_to_hv_device(device);
+
+ kfree(device_ctx);
+
+}
+
+/* The one and only one */
+static struct bus_type hv_bus = {
+ .name = "vmbus",
+ .match = vmbus_match,
+ .shutdown = vmbus_shutdown,
+ .remove = vmbus_remove,
+ .probe = vmbus_probe,
+ .uevent = vmbus_uevent,
+ .dev_attrs = vmbus_device_attrs,
+};
+
+static const char *driver_name = "hyperv";
+
+
+struct onmessage_work_context {
+ struct work_struct work;
+ struct hv_message msg;
+};
+
+static void vmbus_onmessage_work(struct work_struct *work)
+{
+ struct onmessage_work_context *ctx;
+
+ ctx = container_of(work, struct onmessage_work_context,
+ work);
+ vmbus_onmessage(&ctx->msg);
+ kfree(ctx);
+}
+
+/*
+ * vmbus_on_msg_dpc - DPC routine to handle messages from the hypervisior
+ */
+static void vmbus_on_msg_dpc(unsigned long data)
+{
+ int cpu = smp_processor_id();
+ void *page_addr = hv_context.synic_message_page[cpu];
+ struct hv_message *msg = (struct hv_message *)page_addr +
+ VMBUS_MESSAGE_SINT;
+ struct onmessage_work_context *ctx;
+
+ while (1) {
+ if (msg->header.message_type == HVMSG_NONE) {
+ /* no msg */
+ break;
+ } else {
+ ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC);
+ if (ctx == NULL)
+ continue;
+ INIT_WORK(&ctx->work, vmbus_onmessage_work);
+ memcpy(&ctx->msg, msg, sizeof(*msg));
+ queue_work(vmbus_connection.work_queue, &ctx->work);
+ }
+
+ msg->header.message_type = HVMSG_NONE;
+
+ /*
+ * Make sure the write to MessageType (ie set to
+ * HVMSG_NONE) happens before we read the
+ * MessagePending and EOMing. Otherwise, the EOMing
+ * will not deliver any more messages since there is
+ * no empty slot
+ */
+ mb();
+
+ if (msg->header.message_flags.msg_pending) {
+ /*
+ * This will cause message queue rescan to
+ * possibly deliver another msg from the
+ * hypervisor
+ */
+ wrmsrl(HV_X64_MSR_EOM, 0);
+ }
+ }
+}
+
+/*
+ * vmbus_on_isr - ISR routine
+ */
+static int vmbus_on_isr(void)
+{
+ int ret = 0;
+ int cpu = smp_processor_id();
+ void *page_addr;
+ struct hv_message *msg;
+ union hv_synic_event_flags *event;
+
+ page_addr = hv_context.synic_message_page[cpu];
+ msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT;
+
+ /* Check if there are actual msgs to be process */
+ if (msg->header.message_type != HVMSG_NONE)
+ ret |= 0x1;
+
+ /* TODO: Check if there are events to be process */
+ page_addr = hv_context.synic_event_page[cpu];
+ event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT;
+
+ /* Since we are a child, we only need to check bit 0 */
+ if (sync_test_and_clear_bit(0, (unsigned long *) &event->flags32[0]))
+ ret |= 0x2;
+
+ return ret;
+}
+
+
+static irqreturn_t vmbus_isr(int irq, void *dev_id)
+{
+ int ret;
+
+ ret = vmbus_on_isr();
+
+ /* Schedules a dpc if necessary */
+ if (ret > 0) {
+ if (test_bit(0, (unsigned long *)&ret))
+ tasklet_schedule(&msg_dpc);
+
+ if (test_bit(1, (unsigned long *)&ret))
+ tasklet_schedule(&event_dpc);
+
+ return IRQ_HANDLED;
+ } else {
+ return IRQ_NONE;
}
}
*
* Here, we
* - initialize the vmbus driver context
- * - setup various driver entry points
* - invoke the vmbus hv main init routine
* - get the irq resource
- * - invoke the vmbus to add the vmbus root device
- * - setup the vmbus root device
* - retrieve the channel offers
*/
-static int vmbus_bus_init(void)
+static int vmbus_bus_init(struct pci_dev *pdev)
{
- struct vmbus_driver_context *vmbus_drv_ctx = &vmbus_drv;
- struct hv_device *dev_ctx = &vmbus_drv.device_ctx;
int ret;
unsigned int vector;
- DPRINT_INFO(VMBUS, "+++++++ HV Driver version = %s +++++++",
- HV_DRV_VERSION);
- DPRINT_INFO(VMBUS, "+++++++ Vmbus supported version = %d +++++++",
- VMBUS_REVISION_NUMBER);
- DPRINT_INFO(VMBUS, "+++++++ Vmbus using SINT %d +++++++",
- VMBUS_MESSAGE_SINT);
- DPRINT_DBG(VMBUS, "sizeof(vmbus_channel_packet_page_buffer)=%zd, "
- "sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)=%zd",
- sizeof(struct vmbus_channel_packet_page_buffer),
- sizeof(struct vmbus_channel_packet_multipage_buffer));
-
-
/* Hypervisor initialization...setup hypercall page..etc */
ret = hv_init();
if (ret != 0) {
- DPRINT_ERR(VMBUS, "Unable to initialize the hypervisor - 0x%x",
- ret);
+ pr_err("Unable to initialize the hypervisor - 0x%x\n", ret);
goto cleanup;
}
-
- vmbus_drv_ctx->bus.name = driver_name;
-
/* Initialize the bus context */
- tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_on_msg_dpc,
- (unsigned long)NULL);
- tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_on_event,
- (unsigned long)NULL);
+ tasklet_init(&msg_dpc, vmbus_on_msg_dpc, 0);
+ tasklet_init(&event_dpc, vmbus_on_event, 0);
/* Now, register the bus with LDM */
- ret = bus_register(&vmbus_drv_ctx->bus);
+ ret = bus_register(&hv_bus);
if (ret) {
ret = -1;
goto cleanup;
}
/* Get the interrupt resource */
- ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM,
- driver_name, NULL);
-
- if (ret != 0) {
- DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d",
- vmbus_irq);
-
- bus_unregister(&vmbus_drv_ctx->bus);
-
- ret = -1;
- goto cleanup;
- }
- vector = VMBUS_IRQ_VECTOR;
-
- DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector);
-
- /* Add the root device */
- memset(dev_ctx, 0, sizeof(struct hv_device));
+ ret = request_irq(pdev->irq, vmbus_isr,
+ IRQF_SHARED | IRQF_SAMPLE_RANDOM,
+ driver_name, pdev);
- ret = vmbus_dev_add(dev_ctx, &vector);
if (ret != 0) {
- DPRINT_ERR(VMBUS_DRV,
- "ERROR - Unable to add vmbus root device");
+ pr_err("Unable to request IRQ %d\n",
+ pdev->irq);
- free_irq(vmbus_irq, NULL);
-
- bus_unregister(&vmbus_drv_ctx->bus);
+ bus_unregister(&hv_bus);
ret = -1;
goto cleanup;
}
- /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */
- dev_set_name(&dev_ctx->device, "vmbus_0_0");
-
- /* No need to bind a driver to the root device. */
- dev_ctx->device.parent = NULL;
- /* NULL; vmbus_remove() does not get invoked */
- dev_ctx->device.bus = &vmbus_drv_ctx->bus;
- /* Setup the device dispatch table */
- dev_ctx->device.release = vmbus_bus_release;
+ vector = IRQ0_VECTOR + pdev->irq;
- /* register the root device */
- ret = device_register(&dev_ctx->device);
+ /*
+ * Notify the hypervisor of our irq and
+ * connect to the host.
+ */
+ on_each_cpu(hv_synic_init, (void *)&vector, 1);
+ ret = vmbus_connect();
if (ret) {
- DPRINT_ERR(VMBUS_DRV,
- "ERROR - Unable to register vmbus root device");
-
- free_irq(vmbus_irq, NULL);
- bus_unregister(&vmbus_drv_ctx->bus);
-
- ret = -1;
+ free_irq(pdev->irq, pdev);
+ bus_unregister(&hv_bus);
goto cleanup;
}
+
vmbus_request_offers();
- wait_for_completion(&hv_channel_ready);
cleanup:
return ret;
}
-/*
- * vmbus_bus_exit - Terminate the vmbus driver.
- *
- * This routine is opposite of vmbus_bus_init()
- */
-static void vmbus_bus_exit(void)
-{
- struct vmbus_driver_context *vmbus_drv_ctx = &vmbus_drv;
-
- struct hv_device *dev_ctx = &vmbus_drv.device_ctx;
-
- vmbus_release_unattached_channels();
- vmbus_disconnect();
- on_each_cpu(hv_synic_cleanup, NULL, 1);
-
- hv_cleanup();
-
- /* Unregister the root bus device */
- device_unregister(&dev_ctx->device);
-
- bus_unregister(&vmbus_drv_ctx->bus);
-
- free_irq(vmbus_irq, NULL);
-
- tasklet_kill(&vmbus_drv_ctx->msg_dpc);
- tasklet_kill(&vmbus_drv_ctx->event_dpc);
-}
-
-
/**
* vmbus_child_driver_register() - Register a vmbus's child driver
* @drv: Pointer to driver structure you want to register
{
int ret;
- DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s",
- drv, drv->name);
+ pr_info("child driver registering - name %s\n", drv->name);
/* The child driver on this vmbus */
- drv->bus = &vmbus_drv.bus;
+ drv->bus = &hv_bus;
ret = driver_register(drv);
*/
void vmbus_child_driver_unregister(struct device_driver *drv)
{
- DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s",
- drv, drv->name);
+ pr_info("child driver unregistering - name %s\n", drv->name);
driver_unregister(drv);
/* Allocate the new child device */
child_device_obj = kzalloc(sizeof(struct hv_device), GFP_KERNEL);
if (!child_device_obj) {
- DPRINT_ERR(VMBUS_DRV,
- "unable to allocate device_context for child device");
+ pr_err("Unable to allocate device object for child device\n");
return NULL;
}
- DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - "
- "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-"
- "%02x%02x%02x%02x%02x%02x%02x%02x},"
- "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-"
- "%02x%02x%02x%02x%02x%02x%02x%02x}",
- &child_device_obj->device,
- type->data[3], type->data[2], type->data[1], type->data[0],
- type->data[5], type->data[4], type->data[7], type->data[6],
- type->data[8], type->data[9], type->data[10], type->data[11],
- type->data[12], type->data[13], type->data[14], type->data[15],
- instance->data[3], instance->data[2],
- instance->data[1], instance->data[0],
- instance->data[5], instance->data[4],
- instance->data[7], instance->data[6],
- instance->data[8], instance->data[9],
- instance->data[10], instance->data[11],
- instance->data[12], instance->data[13],
- instance->data[14], instance->data[15]);
-
child_device_obj->channel = channel;
memcpy(&child_device_obj->dev_type, type, sizeof(struct hv_guid));
memcpy(&child_device_obj->dev_instance, instance,
static atomic_t device_num = ATOMIC_INIT(0);
- DPRINT_DBG(VMBUS_DRV, "child device (%p) registering",
- child_device_obj);
-
/* Set the device name. Otherwise, device_register() will fail. */
dev_set_name(&child_device_obj->device, "vmbus_0_%d",
atomic_inc_return(&device_num));
/* The new device belongs to this bus */
- child_device_obj->device.bus = &vmbus_drv.bus; /* device->dev.bus; */
- child_device_obj->device.parent = &vmbus_device->device;
+ child_device_obj->device.bus = &hv_bus; /* device->dev.bus; */
+ child_device_obj->device.parent = &hv_pci_dev->dev;
child_device_obj->device.release = vmbus_device_release;
/*
*/
ret = device_register(&child_device_obj->device);
- /* vmbus_probe() error does not get propergate to device_register(). */
- ret = child_device_obj->probe_error;
-
if (ret)
- DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)",
- &child_device_obj->device);
+ pr_err("Unable to register child device\n");
else
- DPRINT_INFO(VMBUS_DRV, "child device (%p) registered",
- &child_device_obj->device);
+ pr_info("child device %s registered\n",
+ dev_name(&child_device_obj->device));
return ret;
}
*/
void vmbus_child_device_unregister(struct hv_device *device_obj)
{
-
- DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)",
- &device_obj->device);
-
/*
* Kick off the process of unregistering the device.
* This will call vmbus_remove() and eventually vmbus_device_release()
*/
device_unregister(&device_obj->device);
- DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered",
- &device_obj->device);
+ pr_info("child device %s unregistered\n",
+ dev_name(&device_obj->device));
}
-/*
- * vmbus_uevent - add uevent for our device
- *
- * This routine is invoked when a device is added or removed on the vmbus to
- * generate a uevent to udev in the userspace. The udev will then look at its
- * rule and the uevent generated here to load the appropriate driver
- */
-static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env)
-{
- struct hv_device *dev = device_to_hv_device(device);
- int ret;
-
- DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={"
- "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
- "%02x%02x%02x%02x%02x%02x%02x%02x}",
- dev->dev_type.data[3], dev->dev_type.data[2],
- dev->dev_type.data[1], dev->dev_type.data[0],
- dev->dev_type.data[5], dev->dev_type.data[4],
- dev->dev_type.data[7], dev->dev_type.data[6],
- dev->dev_type.data[8], dev->dev_type.data[9],
- dev->dev_type.data[10],
- dev->dev_type.data[11],
- dev->dev_type.data[12],
- dev->dev_type.data[13],
- dev->dev_type.data[14],
- dev->dev_type.data[15]);
-
- ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={"
- "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
- "%02x%02x%02x%02x%02x%02x%02x%02x}",
- dev->dev_type.data[3],
- dev->dev_type.data[2],
- dev->dev_type.data[1],
- dev->dev_type.data[0],
- dev->dev_type.data[5],
- dev->dev_type.data[4],
- dev->dev_type.data[7],
- dev->dev_type.data[6],
- dev->dev_type.data[8],
- dev->dev_type.data[9],
- dev->dev_type.data[10],
- dev->dev_type.data[11],
- dev->dev_type.data[12],
- dev->dev_type.data[13],
- dev->dev_type.data[14],
- dev->dev_type.data[15]);
-
- if (ret)
- return ret;
-
- ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={"
- "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
- "%02x%02x%02x%02x%02x%02x%02x%02x}",
- dev->dev_instance.data[3],
- dev->dev_instance.data[2],
- dev->dev_instance.data[1],
- dev->dev_instance.data[0],
- dev->dev_instance.data[5],
- dev->dev_instance.data[4],
- dev->dev_instance.data[7],
- dev->dev_instance.data[6],
- dev->dev_instance.data[8],
- dev->dev_instance.data[9],
- dev->dev_instance.data[10],
- dev->dev_instance.data[11],
- dev->dev_instance.data[12],
- dev->dev_instance.data[13],
- dev->dev_instance.data[14],
- dev->dev_instance.data[15]);
- if (ret)
- return ret;
-
- return 0;
-}
/*
- * vmbus_match - Attempt to match the specified device to the specified driver
+ * VMBUS is an acpi enumerated device. Get the the IRQ information
+ * from DSDT.
*/
-static int vmbus_match(struct device *device, struct device_driver *driver)
-{
- int match = 0;
- struct hv_driver *drv = drv_to_hv_drv(driver);
- struct hv_device *device_ctx = device_to_hv_device(device);
-
- /* We found our driver ? */
- if (memcmp(&device_ctx->dev_type, &drv->dev_type,
- sizeof(struct hv_guid)) == 0) {
-
- device_ctx->drv = drv->priv;
- DPRINT_INFO(VMBUS_DRV,
- "device object (%p) set to driver object (%p)",
- &device_ctx,
- device_ctx->drv);
-
- match = 1;
- }
- return match;
-}
-/*
- * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe()
- *
- * We need a callback because we cannot invoked device_unregister() inside
- * vmbus_probe() since vmbus_probe() may be invoked inside device_register()
- * i.e. we cannot call device_unregister() inside device_register()
- */
-static void vmbus_probe_failed_cb(struct work_struct *context)
+static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *irq)
{
- struct hv_device *device_ctx = (struct hv_device *)context;
-
- /*
- * Kick off the process of unregistering the device.
- * This will call vmbus_remove() and eventually vmbus_device_release()
- */
- device_unregister(&device_ctx->device);
-
- /* put_device(&device_ctx->device); */
-}
-/*
- * vmbus_probe - Add the new vmbus's child device
- */
-static int vmbus_probe(struct device *child_device)
-{
- int ret = 0;
- struct hv_driver *drv =
- drv_to_hv_drv(child_device->driver);
- struct hv_device *dev = device_to_hv_device(child_device);
+ if (res->type == ACPI_RESOURCE_TYPE_IRQ) {
+ struct acpi_resource_irq *irqp;
+ irqp = &res->data.irq;
- /* Let the specific open-source driver handles the probe if it can */
- if (drv->driver.probe) {
- ret = dev->probe_error =
- drv->driver.probe(child_device);
- if (ret != 0) {
- DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s "
- "(%p) on driver %s (%d)...",
- dev_name(child_device), child_device,
- child_device->driver->name, ret);
-
- INIT_WORK(&dev->probe_failed_work_item,
- vmbus_probe_failed_cb);
- schedule_work(&dev->probe_failed_work_item);
- }
- } else {
- DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s",
- child_device->driver->name);
- ret = -1;
+ *((unsigned int *)irq) = irqp->interrupts[0];
}
- return ret;
+
+ return AE_OK;
}
-/*
- * vmbus_remove - Remove a vmbus device
- */
-static int vmbus_remove(struct device *child_device)
+static int vmbus_acpi_add(struct acpi_device *device)
{
- int ret;
- struct hv_driver *drv;
-
- /* Special case root bus device */
- if (child_device->parent == NULL) {
- /*
- * No-op since it is statically defined and handle in
- * vmbus_bus_exit()
- */
- return 0;
- }
+ acpi_status result;
- if (child_device->driver) {
- drv = drv_to_hv_drv(child_device->driver);
+ result =
+ acpi_walk_resources(device->handle, METHOD_NAME__CRS,
+ vmbus_walk_resources, &irq);
- /*
- * Let the specific open-source driver handles the removal if
- * it can
- */
- if (drv->driver.remove) {
- ret = drv->driver.remove(child_device);
- } else {
- DPRINT_ERR(VMBUS_DRV,
- "remove() method not set for driver - %s",
- child_device->driver->name);
- ret = -1;
- }
+ if (ACPI_FAILURE(result)) {
+ complete(&probe_event);
+ return -ENODEV;
}
-
+ complete(&probe_event);
return 0;
}
-/*
- * vmbus_shutdown - Shutdown a vmbus device
- */
-static void vmbus_shutdown(struct device *child_device)
-{
- struct hv_driver *drv;
-
- /* Special case root bus device */
- if (child_device->parent == NULL) {
- /*
- * No-op since it is statically defined and handle in
- * vmbus_bus_exit()
- */
- return;
- }
+static const struct acpi_device_id vmbus_acpi_device_ids[] = {
+ {"VMBUS", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, vmbus_acpi_device_ids);
- /* The device may not be attached yet */
- if (!child_device->driver)
- return;
+static struct acpi_driver vmbus_acpi_driver = {
+ .name = "vmbus",
+ .ids = vmbus_acpi_device_ids,
+ .ops = {
+ .add = vmbus_acpi_add,
+ },
+};
- drv = drv_to_hv_drv(child_device->driver);
+static int vmbus_acpi_init(void)
+{
+ int result;
- /* Let the specific open-source driver handles the removal if it can */
- if (drv->driver.shutdown)
- drv->driver.shutdown(child_device);
- return;
-}
+ result = acpi_bus_register_driver(&vmbus_acpi_driver);
+ if (result < 0)
+ return result;
-/*
- * vmbus_bus_release - Final callback release of the vmbus root device
- */
-static void vmbus_bus_release(struct device *device)
-{
- /* FIXME */
- /* Empty release functions are a bug, or a major sign
- * of a problem design, this MUST BE FIXED! */
- dev_err(device, "%s needs to be fixed!\n", __func__);
- WARN_ON(1);
+ return 0;
}
-/*
- * vmbus_device_release - Final callback release of the vmbus child device
- */
-static void vmbus_device_release(struct device *device)
+static void vmbus_acpi_exit(void)
{
- struct hv_device *device_ctx = device_to_hv_device(device);
-
- kfree(device_ctx);
+ acpi_bus_unregister_driver(&vmbus_acpi_driver);
- /* !!DO NOT REFERENCE device_ctx anymore at this point!! */
+ return;
}
-
-static irqreturn_t vmbus_isr(int irq, void *dev_id)
+static int __devinit hv_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
{
- int ret;
-
- ret = vmbus_on_isr();
-
- /* Schedules a dpc if necessary */
- if (ret > 0) {
- if (test_bit(0, (unsigned long *)&ret))
- tasklet_schedule(&vmbus_drv.msg_dpc);
-
- if (test_bit(1, (unsigned long *)&ret))
- tasklet_schedule(&vmbus_drv.event_dpc);
+ hv_pci_dev = pdev;
- return IRQ_HANDLED;
- } else {
- return IRQ_NONE;
- }
-}
+ pci_probe_error = pci_enable_device(pdev);
+ if (pci_probe_error)
+ goto probe_cleanup;
-static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = {
- {
- .ident = "Hyper-V",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
- DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"),
- DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"),
- },
- },
- { },
-};
-MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table);
+ /*
+ * If the PCI sub-sytem did not assign us an
+ * irq, use the bios provided one.
+ */
-static int __init vmbus_init(void)
-{
- DPRINT_INFO(VMBUS_DRV,
- "Vmbus initializing.... current log level 0x%x (%x,%x)",
- vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel));
- /* Todo: it is used for loglevel, to be ported to new kernel. */
+ if (pdev->irq == 0)
+ pdev->irq = irq;
- if (!dmi_check_system(microsoft_hv_dmi_table))
- return -ENODEV;
+ pci_probe_error = vmbus_bus_init(pdev);
- return vmbus_bus_init();
-}
+ if (pci_probe_error)
+ pci_disable_device(pdev);
-static void __exit vmbus_exit(void)
-{
- vmbus_bus_exit();
- /* Todo: it is used for loglevel, to be ported to new kernel. */
+probe_cleanup:
+ complete(&probe_event);
+ return pci_probe_error;
}
/*
};
MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table);
+static struct pci_driver hv_bus_driver = {
+ .name = "hv_bus",
+ .probe = hv_pci_probe,
+ .id_table = microsoft_hv_pci_table,
+};
+
+static int __init hv_pci_init(void)
+{
+ int ret;
+
+ init_completion(&probe_event);
+
+ /*
+ * Get irq resources first.
+ */
+
+ ret = vmbus_acpi_init();
+ if (ret)
+ return ret;
+
+ wait_for_completion(&probe_event);
+
+ if (irq <= 0) {
+ vmbus_acpi_exit();
+ return -ENODEV;
+ }
+
+ vmbus_acpi_exit();
+ init_completion(&probe_event);
+ ret = pci_register_driver(&hv_bus_driver);
+ if (ret)
+ return ret;
+ /*
+ * All the vmbus initialization occurs within the
+ * hv_pci_probe() function. Wait for hv_pci_probe()
+ * to complete.
+ */
+ wait_for_completion(&probe_event);
+
+ if (pci_probe_error)
+ pci_unregister_driver(&hv_bus_driver);
+ return pci_probe_error;
+}
+
+
MODULE_LICENSE("GPL");
MODULE_VERSION(HV_DRV_VERSION);
-module_param(vmbus_irq, int, S_IRUGO);
-module_param(vmbus_loglevel, int, S_IRUGO);
+module_param(vmbus_loglevel, int, S_IRUGO|S_IWUSR);
-module_init(vmbus_init);
-module_exit(vmbus_exit);
+module_init(hv_pci_init);
projects / firefly-linux-kernel-4.4.55.git / blobdiff