drivers/uio/uio_hv_generic.c

80 	struct hv_uio_private_data *pdata = info->priv;
81 	struct hv_device *dev = pdata->device;
99 	struct hv_uio_private_data *pdata = hv_get_drvdata(hv_dev);
104 	uio_event_notify(&pdata->info);
113 	struct hv_uio_private_data *pdata = hv_get_drvdata(hv_dev);
119 	pdata->info.irq = 0;
122 	uio_event_notify(&pdata->info);
182 hv_uio_cleanup(struct hv_device *dev, struct hv_uio_private_data *pdata)
184 	if (pdata->send_gpadl.gpadl_handle) {
185 		vmbus_teardown_gpadl(dev->channel, &pdata->send_gpadl);
186 		if (!pdata->send_gpadl.decrypted)
187 			vfree(pdata->send_buf);
190 	if (pdata->recv_gpadl.gpadl_handle) {
191 		vmbus_teardown_gpadl(dev->channel, &pdata->recv_gpadl);
192 		if (!pdata->recv_gpadl.decrypted)
193 			vfree(pdata->recv_buf);
201 	struct hv_uio_private_data *pdata
203 	struct hv_device *dev = pdata->device;
206 	if (atomic_inc_return(&pdata->refcnt) != 1)
217 		atomic_dec(&pdata->refcnt);
226 	struct hv_uio_private_data *pdata
228 	struct hv_device *dev = pdata->device;
231 	if (atomic_dec_and_test(&pdata->refcnt))
242 	struct hv_uio_private_data *pdata;
250 	pdata = devm_kzalloc(&dev->device, sizeof(*pdata), GFP_KERNEL);
251 	if (!pdata)
261 	pdata->info.name = "uio_hv_generic";
262 	pdata->info.version = DRIVER_VERSION;
263 	pdata->info.irqcontrol = hv_uio_irqcontrol;
264 	pdata->info.open = hv_uio_open;
265 	pdata->info.release = hv_uio_release;
266 	pdata->info.irq = UIO_IRQ_CUSTOM;
267 	atomic_set(&pdata->refcnt, 0);
270 	pdata->info.mem[TXRX_RING_MAP].name = "txrx_rings";
272 	pdata->info.mem[TXRX_RING_MAP].addr
274 	pdata->info.mem[TXRX_RING_MAP].size
276 	pdata->info.mem[TXRX_RING_MAP].memtype = UIO_MEM_IOVA;
278 	pdata->info.mem[INT_PAGE_MAP].name = "int_page";
279 	pdata->info.mem[INT_PAGE_MAP].addr
281 	pdata->info.mem[INT_PAGE_MAP].size = PAGE_SIZE;
282 	pdata->info.mem[INT_PAGE_MAP].memtype = UIO_MEM_LOGICAL;
284 	pdata->info.mem[MON_PAGE_MAP].name = "monitor_page";
285 	pdata->info.mem[MON_PAGE_MAP].addr
287 	pdata->info.mem[MON_PAGE_MAP].size = PAGE_SIZE;
288 	pdata->info.mem[MON_PAGE_MAP].memtype = UIO_MEM_LOGICAL;
290 	pdata->recv_buf = vzalloc(RECV_BUFFER_SIZE);
291 	if (pdata->recv_buf == NULL) {
296 	ret = vmbus_establish_gpadl(channel, pdata->recv_buf,
297 				    RECV_BUFFER_SIZE, &pdata->recv_gpadl);
299 		if (!pdata->recv_gpadl.decrypted)
300 			vfree(pdata->recv_buf);
305 	snprintf(pdata->recv_name, sizeof(pdata->recv_name),
306 		 "recv:%u", pdata->recv_gpadl.gpadl_handle);
307 	pdata->info.mem[RECV_BUF_MAP].name = pdata->recv_name;
308 	pdata->info.mem[RECV_BUF_MAP].addr
309 		= (uintptr_t)pdata->recv_buf;
310 	pdata->info.mem[RECV_BUF_MAP].size = RECV_BUFFER_SIZE;
311 	pdata->info.mem[RECV_BUF_MAP].memtype = UIO_MEM_VIRTUAL;
313 	pdata->send_buf = vzalloc(SEND_BUFFER_SIZE);
314 	if (pdata->send_buf == NULL) {
319 	ret = vmbus_establish_gpadl(channel, pdata->send_buf,
320 				    SEND_BUFFER_SIZE, &pdata->send_gpadl);
322 		if (!pdata->send_gpadl.decrypted)
323 			vfree(pdata->send_buf);
327 	snprintf(pdata->send_name, sizeof(pdata->send_name),
328 		 "send:%u", pdata->send_gpadl.gpadl_handle);
329 	pdata->info.mem[SEND_BUF_MAP].name = pdata->send_name;
330 	pdata->info.mem[SEND_BUF_MAP].addr
331 		= (uintptr_t)pdata->send_buf;
332 	pdata->info.mem[SEND_BUF_MAP].size = SEND_BUFFER_SIZE;
333 	pdata->info.mem[SEND_BUF_MAP].memtype = UIO_MEM_VIRTUAL;
335 	pdata->info.priv = pdata;
336 	pdata->device = dev;
338 	ret = uio_register_device(&dev->device, &pdata->info);
349 	hv_set_drvdata(dev, pdata);
354 	hv_uio_cleanup(dev, pdata);
364 	struct hv_uio_private_data *pdata = hv_get_drvdata(dev);
366 	if (!pdata)
370 	uio_unregister_device(&pdata->info);
371 	hv_uio_cleanup(dev, pdata);