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-rw-r--r--drivers/uio/uio_hv_generic.c71
1 files changed, 69 insertions, 2 deletions
diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c
index a0c4c07a907f..dcd80aad9636 100644
--- a/drivers/uio/uio_hv_generic.c
+++ b/drivers/uio/uio_hv_generic.c
@@ -39,6 +39,10 @@
#define DRIVER_AUTHOR "Stephen Hemminger <sthemmin at microsoft.com>"
#define DRIVER_DESC "Generic UIO driver for VMBus devices"
+#define HV_RING_SIZE 512 /* pages */
+#define SEND_BUFFER_SIZE (15 * 1024 * 1024)
+#define RECV_BUFFER_SIZE (15 * 1024 * 1024)
+
/*
* List of resources to be mapped to user space
* can be extended up to MAX_UIO_MAPS(5) items
@@ -47,13 +51,21 @@ enum hv_uio_map {
TXRX_RING_MAP = 0,
INT_PAGE_MAP,
MON_PAGE_MAP,
+ RECV_BUF_MAP,
+ SEND_BUF_MAP
};
-#define HV_RING_SIZE 512
-
struct hv_uio_private_data {
struct uio_info info;
struct hv_device *device;
+
+ void *recv_buf;
+ u32 recv_gpadl;
+ char recv_name[32]; /* "recv_4294967295" */
+
+ void *send_buf;
+ u32 send_gpadl;
+ char send_name[32];
};
/*
@@ -91,6 +103,19 @@ static void hv_uio_channel_cb(void *context)
uio_event_notify(&pdata->info);
}
+
+static void
+hv_uio_cleanup(struct hv_device *dev, struct hv_uio_private_data *pdata)
+{
+ if (pdata->send_gpadl)
+ vmbus_teardown_gpadl(dev->channel, pdata->send_gpadl);
+ vfree(pdata->send_buf);
+
+ if (pdata->recv_gpadl)
+ vmbus_teardown_gpadl(dev->channel, pdata->recv_gpadl);
+ vfree(pdata->recv_buf);
+}
+
static int
hv_uio_probe(struct hv_device *dev,
const struct hv_vmbus_device_id *dev_id)
@@ -137,6 +162,46 @@ hv_uio_probe(struct hv_device *dev,
pdata->info.mem[MON_PAGE_MAP].size = PAGE_SIZE;
pdata->info.mem[MON_PAGE_MAP].memtype = UIO_MEM_LOGICAL;
+ pdata->recv_buf = vzalloc(RECV_BUFFER_SIZE);
+ if (pdata->recv_buf == NULL) {
+ ret = -ENOMEM;
+ goto fail_close;
+ }
+
+ ret = vmbus_establish_gpadl(dev->channel, pdata->recv_buf,
+ RECV_BUFFER_SIZE, &pdata->recv_gpadl);
+ if (ret)
+ goto fail_close;
+
+ /* put Global Physical Address Label in name */
+ snprintf(pdata->recv_name, sizeof(pdata->recv_name),
+ "recv:%u", pdata->recv_gpadl);
+ pdata->info.mem[RECV_BUF_MAP].name = pdata->recv_name;
+ pdata->info.mem[RECV_BUF_MAP].addr
+ = (phys_addr_t)pdata->recv_buf;
+ pdata->info.mem[RECV_BUF_MAP].size = RECV_BUFFER_SIZE;
+ pdata->info.mem[RECV_BUF_MAP].memtype = UIO_MEM_VIRTUAL;
+
+
+ pdata->send_buf = vzalloc(SEND_BUFFER_SIZE);
+ if (pdata->send_buf == NULL) {
+ ret = -ENOMEM;
+ goto fail_close;
+ }
+
+ ret = vmbus_establish_gpadl(dev->channel, pdata->send_buf,
+ SEND_BUFFER_SIZE, &pdata->send_gpadl);
+ if (ret)
+ goto fail_close;
+
+ snprintf(pdata->send_name, sizeof(pdata->send_name),
+ "send:%u", pdata->send_gpadl);
+ pdata->info.mem[SEND_BUF_MAP].name = pdata->send_name;
+ pdata->info.mem[SEND_BUF_MAP].addr
+ = (phys_addr_t)pdata->send_buf;
+ pdata->info.mem[SEND_BUF_MAP].size = SEND_BUFFER_SIZE;
+ pdata->info.mem[SEND_BUF_MAP].memtype = UIO_MEM_VIRTUAL;
+
pdata->info.priv = pdata;
pdata->device = dev;
@@ -151,6 +216,7 @@ hv_uio_probe(struct hv_device *dev,
return 0;
fail_close:
+ hv_uio_cleanup(dev, pdata);
vmbus_close(dev->channel);
fail:
kfree(pdata);
@@ -167,6 +233,7 @@ hv_uio_remove(struct hv_device *dev)
return 0;
uio_unregister_device(&pdata->info);
+ hv_uio_cleanup(dev, pdata);
hv_set_drvdata(dev, NULL);
vmbus_close(dev->channel);
kfree(pdata);