drivers/uio/uio_hv_generic.c

81 	struct hv_uio_private_data *pdata = info->priv;
82 	struct hv_device *dev = pdata->device;
97 	struct hv_uio_private_data *pdata = hv_get_drvdata(hv_dev);
102 	uio_event_notify(&pdata->info);
111 	struct hv_uio_private_data *pdata = hv_get_drvdata(hv_dev);
117 	pdata->info.irq = 0;
120 	uio_event_notify(&pdata->info);
180 hv_uio_cleanup(struct hv_device *dev, struct hv_uio_private_data *pdata)
182 	if (pdata->send_gpadl.gpadl_handle) {
183 		vmbus_teardown_gpadl(dev->channel, &pdata->send_gpadl);
184 		if (!pdata->send_gpadl.decrypted)
185 			vfree(pdata->send_buf);
188 	if (pdata->recv_gpadl.gpadl_handle) {
189 		vmbus_teardown_gpadl(dev->channel, &pdata->recv_gpadl);
190 		if (!pdata->recv_gpadl.decrypted)
191 			vfree(pdata->recv_buf);
199 	struct hv_uio_private_data *pdata
201 	struct hv_device *dev = pdata->device;
204 	if (atomic_inc_return(&pdata->refcnt) != 1)
215 		atomic_dec(&pdata->refcnt);
224 	struct hv_uio_private_data *pdata
226 	struct hv_device *dev = pdata->device;
229 	if (atomic_dec_and_test(&pdata->refcnt))
240 	struct hv_uio_private_data *pdata;
250 	pdata = devm_kzalloc(&dev->device, sizeof(*pdata), GFP_KERNEL);
251 	if (!pdata)
262 	pdata->info.name = "uio_hv_generic";
263 	pdata->info.version = DRIVER_VERSION;
264 	pdata->info.irqcontrol = hv_uio_irqcontrol;
265 	pdata->info.open = hv_uio_open;
266 	pdata->info.release = hv_uio_release;
267 	pdata->info.irq = UIO_IRQ_CUSTOM;
268 	atomic_set(&pdata->refcnt, 0);
271 	pdata->info.mem[TXRX_RING_MAP].name = "txrx_rings";
273 	pdata->info.mem[TXRX_RING_MAP].addr
275 	pdata->info.mem[TXRX_RING_MAP].size
277 	pdata->info.mem[TXRX_RING_MAP].memtype = UIO_MEM_IOVA;
279 	pdata->info.mem[INT_PAGE_MAP].name = "int_page";
280 	pdata->info.mem[INT_PAGE_MAP].addr
282 	pdata->info.mem[INT_PAGE_MAP].size = PAGE_SIZE;
283 	pdata->info.mem[INT_PAGE_MAP].memtype = UIO_MEM_LOGICAL;
285 	pdata->info.mem[MON_PAGE_MAP].name = "monitor_page";
286 	pdata->info.mem[MON_PAGE_MAP].addr
288 	pdata->info.mem[MON_PAGE_MAP].size = PAGE_SIZE;
289 	pdata->info.mem[MON_PAGE_MAP].memtype = UIO_MEM_LOGICAL;
291 	pdata->recv_buf = vzalloc(RECV_BUFFER_SIZE);
292 	if (pdata->recv_buf == NULL) {
297 	ret = vmbus_establish_gpadl(channel, pdata->recv_buf,
298 				    RECV_BUFFER_SIZE, &pdata->recv_gpadl);
300 		if (!pdata->recv_gpadl.decrypted)
301 			vfree(pdata->recv_buf);
306 	snprintf(pdata->recv_name, sizeof(pdata->recv_name),
307 		 "recv:%u", pdata->recv_gpadl.gpadl_handle);
308 	pdata->info.mem[RECV_BUF_MAP].name = pdata->recv_name;
309 	pdata->info.mem[RECV_BUF_MAP].addr
310 		= (uintptr_t)pdata->recv_buf;
311 	pdata->info.mem[RECV_BUF_MAP].size = RECV_BUFFER_SIZE;
312 	pdata->info.mem[RECV_BUF_MAP].memtype = UIO_MEM_VIRTUAL;
314 	pdata->send_buf = vzalloc(SEND_BUFFER_SIZE);
315 	if (pdata->send_buf == NULL) {
320 	ret = vmbus_establish_gpadl(channel, pdata->send_buf,
321 				    SEND_BUFFER_SIZE, &pdata->send_gpadl);
323 		if (!pdata->send_gpadl.decrypted)
324 			vfree(pdata->send_buf);
328 	snprintf(pdata->send_name, sizeof(pdata->send_name),
329 		 "send:%u", pdata->send_gpadl.gpadl_handle);
330 	pdata->info.mem[SEND_BUF_MAP].name = pdata->send_name;
331 	pdata->info.mem[SEND_BUF_MAP].addr
332 		= (uintptr_t)pdata->send_buf;
333 	pdata->info.mem[SEND_BUF_MAP].size = SEND_BUFFER_SIZE;
334 	pdata->info.mem[SEND_BUF_MAP].memtype = UIO_MEM_VIRTUAL;
336 	pdata->info.priv = pdata;
337 	pdata->device = dev;
339 	ret = uio_register_device(&dev->device, &pdata->info);
350 	hv_set_drvdata(dev, pdata);
355 	hv_uio_cleanup(dev, pdata);
365 	struct hv_uio_private_data *pdata = hv_get_drvdata(dev);
367 	if (!pdata)
371 	uio_unregister_device(&pdata->info);
372 	hv_uio_cleanup(dev, pdata);