Esempio n. 1
0
static int
hv_uio_probe(struct hv_device *dev,
	     const struct hv_vmbus_device_id *dev_id)
{
	struct vmbus_channel *channel = dev->channel;
	struct hv_uio_private_data *pdata;
	void *ring_buffer;
	int ret;

	/* Communicating with host has to be via shared memory not hypercall */
	if (!channel->offermsg.monitor_allocated) {
		dev_err(&dev->device, "vmbus channel requires hypercall\n");
		return -ENOTSUPP;
	}

	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return -ENOMEM;

	ret = vmbus_alloc_ring(channel, HV_RING_SIZE * PAGE_SIZE,
			       HV_RING_SIZE * PAGE_SIZE);
	if (ret)
		goto fail;

	set_channel_read_mode(channel, HV_CALL_ISR);

	/* Fill general uio info */
	pdata->info.name = "uio_hv_generic";
	pdata->info.version = DRIVER_VERSION;
	pdata->info.irqcontrol = hv_uio_irqcontrol;
	pdata->info.open = hv_uio_open;
	pdata->info.release = hv_uio_release;
	pdata->info.irq = UIO_IRQ_CUSTOM;
	atomic_set(&pdata->refcnt, 0);

	/* mem resources */
	pdata->info.mem[TXRX_RING_MAP].name = "txrx_rings";
	ring_buffer = page_address(channel->ringbuffer_page);
	pdata->info.mem[TXRX_RING_MAP].addr
		= (uintptr_t)virt_to_phys(ring_buffer);
	pdata->info.mem[TXRX_RING_MAP].size
		= channel->ringbuffer_pagecount << PAGE_SHIFT;
	pdata->info.mem[TXRX_RING_MAP].memtype = UIO_MEM_IOVA;

	pdata->info.mem[INT_PAGE_MAP].name = "int_page";
	pdata->info.mem[INT_PAGE_MAP].addr
		= (uintptr_t)vmbus_connection.int_page;
	pdata->info.mem[INT_PAGE_MAP].size = PAGE_SIZE;
	pdata->info.mem[INT_PAGE_MAP].memtype = UIO_MEM_LOGICAL;

	pdata->info.mem[MON_PAGE_MAP].name = "monitor_page";
	pdata->info.mem[MON_PAGE_MAP].addr
		= (uintptr_t)vmbus_connection.monitor_pages[1];
	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(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
		= (uintptr_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(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
		= (uintptr_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;

	ret = uio_register_device(&dev->device, &pdata->info);
	if (ret) {
		dev_err(&dev->device, "hv_uio register failed\n");
		goto fail_close;
	}

	ret = sysfs_create_bin_file(&channel->kobj, &ring_buffer_bin_attr);
	if (ret)
		dev_notice(&dev->device,
			   "sysfs create ring bin file failed; %d\n", ret);

	hv_set_drvdata(dev, pdata);

	return 0;

fail_close:
	hv_uio_cleanup(dev, pdata);
fail:
	kfree(pdata);

	return ret;
}
Esempio n. 2
0
static int netvsc_init_buf(struct hv_device *device)
{
	int ret = 0;
	unsigned long t;
	struct netvsc_device *net_device;
	struct nvsp_message *init_packet;
	struct net_device *ndev;
	int node;

	net_device = get_outbound_net_device(device);
	if (!net_device)
		return -ENODEV;
	ndev = net_device->ndev;

	node = cpu_to_node(device->channel->target_cpu);
	net_device->recv_buf = vzalloc_node(net_device->recv_buf_size, node);
	if (!net_device->recv_buf)
		net_device->recv_buf = vzalloc(net_device->recv_buf_size);

	if (!net_device->recv_buf) {
		netdev_err(ndev, "unable to allocate receive "
			"buffer of size %d\n", net_device->recv_buf_size);
		ret = -ENOMEM;
		goto cleanup;
	}

	/*
	 * Establish the gpadl handle for this buffer on this
	 * channel.  Note: This call uses the vmbus connection rather
	 * than the channel to establish the gpadl handle.
	 */
	ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf,
				    net_device->recv_buf_size,
				    &net_device->recv_buf_gpadl_handle);
	if (ret != 0) {
		netdev_err(ndev,
			"unable to establish receive buffer's gpadl\n");
		goto cleanup;
	}


	/* Notify the NetVsp of the gpadl handle */
	init_packet = &net_device->channel_init_pkt;

	memset(init_packet, 0, sizeof(struct nvsp_message));

	init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF;
	init_packet->msg.v1_msg.send_recv_buf.
		gpadl_handle = net_device->recv_buf_gpadl_handle;
	init_packet->msg.v1_msg.
		send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID;

	/* Send the gpadl notification request */
	ret = vmbus_sendpacket(device->channel, init_packet,
			       sizeof(struct nvsp_message),
			       (unsigned long)init_packet,
			       VM_PKT_DATA_INBAND,
			       VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
	if (ret != 0) {
		netdev_err(ndev,
			"unable to send receive buffer's gpadl to netvsp\n");
		goto cleanup;
	}

	t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ);
	BUG_ON(t == 0);


	/* Check the response */
	if (init_packet->msg.v1_msg.
	    send_recv_buf_complete.status != NVSP_STAT_SUCCESS) {
		netdev_err(ndev, "Unable to complete receive buffer "
			   "initialization with NetVsp - status %d\n",
			   init_packet->msg.v1_msg.
			   send_recv_buf_complete.status);
		ret = -EINVAL;
		goto cleanup;
	}

	/* Parse the response */

	net_device->recv_section_cnt = init_packet->msg.
		v1_msg.send_recv_buf_complete.num_sections;

	net_device->recv_section = kmemdup(
		init_packet->msg.v1_msg.send_recv_buf_complete.sections,
		net_device->recv_section_cnt *
		sizeof(struct nvsp_1_receive_buffer_section),
		GFP_KERNEL);
	if (net_device->recv_section == NULL) {
		ret = -EINVAL;
		goto cleanup;
	}

	/*
	 * For 1st release, there should only be 1 section that represents the
	 * entire receive buffer
	 */
	if (net_device->recv_section_cnt != 1 ||
	    net_device->recv_section->offset != 0) {
		ret = -EINVAL;
		goto cleanup;
	}

	/* Now setup the send buffer.
	 */
	net_device->send_buf = vzalloc_node(net_device->send_buf_size, node);
	if (!net_device->send_buf)
		net_device->send_buf = vzalloc(net_device->send_buf_size);
	if (!net_device->send_buf) {
		netdev_err(ndev, "unable to allocate send "
			   "buffer of size %d\n", net_device->send_buf_size);
		ret = -ENOMEM;
		goto cleanup;
	}

	/* Establish the gpadl handle for this buffer on this
	 * channel.  Note: This call uses the vmbus connection rather
	 * than the channel to establish the gpadl handle.
	 */
	ret = vmbus_establish_gpadl(device->channel, net_device->send_buf,
				    net_device->send_buf_size,
				    &net_device->send_buf_gpadl_handle);
	if (ret != 0) {
		netdev_err(ndev,
			   "unable to establish send buffer's gpadl\n");
		goto cleanup;
	}

	/* Notify the NetVsp of the gpadl handle */
	init_packet = &net_device->channel_init_pkt;
	memset(init_packet, 0, sizeof(struct nvsp_message));
	init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF;
	init_packet->msg.v1_msg.send_send_buf.gpadl_handle =
		net_device->send_buf_gpadl_handle;
	init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID;

	/* Send the gpadl notification request */
	ret = vmbus_sendpacket(device->channel, init_packet,
			       sizeof(struct nvsp_message),
			       (unsigned long)init_packet,
			       VM_PKT_DATA_INBAND,
			       VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
	if (ret != 0) {
		netdev_err(ndev,
			   "unable to send send buffer's gpadl to netvsp\n");
		goto cleanup;
	}

	t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ);
	BUG_ON(t == 0);

	/* Check the response */
	if (init_packet->msg.v1_msg.
	    send_send_buf_complete.status != NVSP_STAT_SUCCESS) {
		netdev_err(ndev, "Unable to complete send buffer "
			   "initialization with NetVsp - status %d\n",
			   init_packet->msg.v1_msg.
			   send_send_buf_complete.status);
		ret = -EINVAL;
		goto cleanup;
	}

	/* Parse the response */
	net_device->send_section_size = init_packet->msg.
				v1_msg.send_send_buf_complete.section_size;

	/* Section count is simply the size divided by the section size.
	 */
	net_device->send_section_cnt =
		net_device->send_buf_size/net_device->send_section_size;

	dev_info(&device->device, "Send section size: %d, Section count:%d\n",
		 net_device->send_section_size, net_device->send_section_cnt);

	/* Setup state for managing the send buffer. */
	net_device->map_words = DIV_ROUND_UP(net_device->send_section_cnt,
					     BITS_PER_LONG);

	net_device->send_section_map =
		kzalloc(net_device->map_words * sizeof(ulong), GFP_KERNEL);
	if (net_device->send_section_map == NULL) {
		ret = -ENOMEM;
		goto cleanup;
	}

	goto exit;

cleanup:
	netvsc_destroy_buf(net_device);

exit:
	return ret;
}
Esempio n. 3
0
static int
hv_uio_probe(struct hv_device *dev,
	     const struct hv_vmbus_device_id *dev_id)
{
	struct hv_uio_private_data *pdata;
	int ret;

	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return -ENOMEM;

	ret = vmbus_open(dev->channel, HV_RING_SIZE * PAGE_SIZE,
			 HV_RING_SIZE * PAGE_SIZE, NULL, 0,
			 hv_uio_channel_cb, pdata);
	if (ret)
		goto fail;

	/* Communicating with host has to be via shared memory not hypercall */
	if (!dev->channel->offermsg.monitor_allocated) {
		dev_err(&dev->device, "vmbus channel requires hypercall\n");
		ret = -ENOTSUPP;
		goto fail_close;
	}

	dev->channel->inbound.ring_buffer->interrupt_mask = 1;
	set_channel_read_mode(dev->channel, HV_CALL_ISR);

	/* Fill general uio info */
	pdata->info.name = "uio_hv_generic";
	pdata->info.version = DRIVER_VERSION;
	pdata->info.irqcontrol = hv_uio_irqcontrol;
	pdata->info.irq = UIO_IRQ_CUSTOM;

	/* mem resources */
	pdata->info.mem[TXRX_RING_MAP].name = "txrx_rings";
	pdata->info.mem[TXRX_RING_MAP].addr
		= (phys_addr_t)dev->channel->ringbuffer_pages;
	pdata->info.mem[TXRX_RING_MAP].size
		= dev->channel->ringbuffer_pagecount << PAGE_SHIFT;
	pdata->info.mem[TXRX_RING_MAP].memtype = UIO_MEM_LOGICAL;

	pdata->info.mem[INT_PAGE_MAP].name = "int_page";
	pdata->info.mem[INT_PAGE_MAP].addr
		= (phys_addr_t)vmbus_connection.int_page;
	pdata->info.mem[INT_PAGE_MAP].size = PAGE_SIZE;
	pdata->info.mem[INT_PAGE_MAP].memtype = UIO_MEM_LOGICAL;

	pdata->info.mem[MON_PAGE_MAP].name = "monitor_page";
	pdata->info.mem[MON_PAGE_MAP].addr
		= (phys_addr_t)vmbus_connection.monitor_pages[1];
	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;

	ret = uio_register_device(&dev->device, &pdata->info);
	if (ret) {
		dev_err(&dev->device, "hv_uio register failed\n");
		goto fail_close;
	}

	vmbus_set_chn_rescind_callback(dev->channel, hv_uio_rescind);

	hv_set_drvdata(dev, pdata);

	return 0;

fail_close:
	hv_uio_cleanup(dev, pdata);
	vmbus_close(dev->channel);
fail:
	kfree(pdata);

	return ret;
}