2 * Copyright (c) 2018 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vlib/vlib.h>
17 #include <vlib/pci/pci.h>
18 #include <vnet/ethernet/ethernet.h>
19 #include <vnet/ip/ip4_packet.h>
20 #include <vnet/ip/ip6_packet.h>
21 #include <vnet/devices/virtio/virtio.h>
22 #include <vnet/devices/virtio/virtio_pci_legacy.h>
23 #include <vnet/devices/virtio/pci.h>
25 #define PCI_CONFIG_SIZE(vif) ((vif->msix_enabled == VIRTIO_MSIX_ENABLED) ? \
29 virtio_pci_legacy_read_config (vlib_main_t * vm, virtio_if_t * vif, void *dst,
33 vlib_pci_dev_handle_t h = vif->pci_dev_handle;
40 vlib_pci_read_io_u32 (vm, h, PCI_CONFIG_SIZE (vif) + addr, dst);
45 vlib_pci_read_io_u16 (vm, h, PCI_CONFIG_SIZE (vif) + addr, dst);
50 vlib_pci_read_io_u8 (vm, h, PCI_CONFIG_SIZE (vif) + addr, dst);
52 dst = (u8 *) dst + size;
59 virtio_pci_legacy_write_config (vlib_main_t * vm, virtio_if_t * vif,
60 void *src, int len, u32 addr)
63 vlib_pci_dev_handle_t h = vif->pci_dev_handle;
70 vlib_pci_write_io_u32 (vm, h, PCI_CONFIG_SIZE (vif) + addr, src);
75 vlib_pci_write_io_u16 (vm, h, PCI_CONFIG_SIZE (vif) + addr, src);
80 vlib_pci_write_io_u8 (vm, h, PCI_CONFIG_SIZE (vif) + addr, src);
82 src = (u8 *) src + size;
89 virtio_pci_legacy_get_host_features (vlib_main_t * vm, virtio_if_t * vif)
92 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_HOST_FEATURES,
98 virtio_pci_legacy_get_guest_features (vlib_main_t * vm, virtio_if_t * vif)
100 u32 guest_features = 0;
101 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
103 vif->features = guest_features;
104 return guest_features;
108 virtio_pci_legacy_set_guest_features (vlib_main_t * vm, virtio_if_t * vif,
111 if ((guest_features >> 32) != 0)
113 clib_warning ("only 32 bit features are allowed for legacy virtio!");
116 vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
117 (u32 *) & guest_features);
118 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
120 if (features != (u32) guest_features)
122 clib_warning ("legacy set guest features failed!");
127 virtio_pci_legacy_get_status (vlib_main_t * vm, virtio_if_t * vif)
130 vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &status);
135 virtio_pci_legacy_set_status (vlib_main_t * vm, virtio_if_t * vif, u8 status)
137 if (status != VIRTIO_CONFIG_STATUS_RESET)
138 status |= virtio_pci_legacy_get_status (vm, vif);
139 vlib_pci_write_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &status);
143 virtio_pci_legacy_reset (vlib_main_t * vm, virtio_if_t * vif)
145 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_RESET);
146 return virtio_pci_legacy_get_status (vm, vif);
150 virtio_pci_legacy_get_isr (vlib_main_t * vm, virtio_if_t * vif)
153 vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_ISR, &isr);
158 virtio_pci_legacy_get_queue_num (vlib_main_t * vm, virtio_if_t * vif,
162 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
164 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NUM,
170 virtio_pci_legacy_set_queue_num (vlib_main_t * vm, virtio_if_t * vif,
171 u16 queue_id, u16 queue_size)
177 virtio_pci_legacy_setup_queue (vlib_main_t * vm, virtio_if_t * vif,
178 u16 queue_id, void *p)
180 u64 addr = vlib_physmem_get_pa (vm, p) >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
182 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
184 vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN,
186 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN,
188 if ((u32) addr == addr2)
191 clib_warning ("legacy queue setup failed!");
196 virtio_pci_legacy_del_queue (vlib_main_t * vm, virtio_if_t * vif,
200 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
202 vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN, &src);
206 virtio_pci_legacy_notify_queue (vlib_main_t * vm, virtio_if_t * vif,
209 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NOTIFY,
213 /* Enable one vector (0) for Link State Intrerrupt */
215 virtio_pci_legacy_set_config_irq (vlib_main_t * vm, virtio_if_t * vif,
218 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
220 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
226 virtio_pci_legacy_set_queue_irq (vlib_main_t * vm, virtio_if_t * vif, u16 vec,
229 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
231 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
233 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
239 virtio_pci_legacy_get_mac (vlib_main_t * vm, virtio_if_t * vif)
241 virtio_pci_legacy_read_config (vm, vif, vif->mac_addr,
242 sizeof (vif->mac_addr), 0);
246 virtio_pci_legacy_set_mac (vlib_main_t * vm, virtio_if_t * vif)
248 virtio_pci_legacy_write_config (vm, vif, vif->mac_addr,
249 sizeof (vif->mac_addr), 0);
253 virtio_pci_legacy_get_device_status (vlib_main_t * vm, virtio_if_t * vif)
256 virtio_pci_legacy_read_config (vm, vif, &status,
259 (virtio_net_config_t, status));
264 virtio_pci_legacy_get_max_queue_pairs (vlib_main_t * vm, virtio_if_t * vif)
266 virtio_net_config_t config;
267 virtio_pci_legacy_read_config (vm, vif, &config.max_virtqueue_pairs,
268 sizeof (config.max_virtqueue_pairs),
270 (virtio_net_config_t, max_virtqueue_pairs));
271 return config.max_virtqueue_pairs;
275 virtio_pci_legacy_get_mtu (vlib_main_t * vm, virtio_if_t * vif)
277 virtio_net_config_t config;
278 virtio_pci_legacy_read_config (vm, vif, &config.mtu,
280 STRUCT_OFFSET_OF (virtio_net_config_t, mtu));
286 virtio_pci_legacy_device_debug_config_space (vlib_main_t * vm,
292 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_HOST_FEATURES,
294 vlib_cli_output (vm, "remote features 0x%lx", data_u32);
295 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
297 vlib_cli_output (vm, "guest features 0x%lx", data_u32);
298 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN,
300 vlib_cli_output (vm, "queue address 0x%lx", data_u32);
301 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NUM,
303 vlib_cli_output (vm, "queue size 0x%x", data_u16);
304 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
306 vlib_cli_output (vm, "queue select 0x%x", data_u16);
307 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NOTIFY,
309 vlib_cli_output (vm, "queue notify 0x%x", data_u16);
310 vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &data_u8);
311 vlib_cli_output (vm, "status 0x%x", data_u8);
312 vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_ISR, &data_u8);
313 vlib_cli_output (vm, "isr 0x%x", data_u8);
315 if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
317 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
319 vlib_cli_output (vm, "config vector 0x%x", data_u16);
321 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
323 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
325 vlib_cli_output (vm, "queue vector for queue (0) 0x%x", data_u16);
329 virtio_pci_legacy_read_config (vm, vif, mac, sizeof (mac), 0);
330 vlib_cli_output (vm, "mac %U", format_ethernet_address, mac);
331 virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16), /* offset to status */
333 vlib_cli_output (vm, "link up/down status 0x%x", data_u16);
334 virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16),
335 /* offset to max_virtqueue */ 8);
336 vlib_cli_output (vm, "num of virtqueue 0x%x", data_u16);
337 virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16), /* offset to mtu */
339 vlib_cli_output (vm, "mtu 0x%x", data_u16);
341 u32 i = PCI_CONFIG_SIZE (vif) + 12, a = 4;
344 for (; i < 64; i += 4)
347 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, i, &data);
348 vlib_cli_output (vm, "0x%lx", data);
352 const virtio_pci_func_t virtio_pci_legacy_func = {
353 .read_config = virtio_pci_legacy_read_config,
354 .write_config = virtio_pci_legacy_write_config,
355 .get_device_features = virtio_pci_legacy_get_host_features,
356 .get_driver_features = virtio_pci_legacy_get_guest_features,
357 .set_driver_features = virtio_pci_legacy_set_guest_features,
358 .get_status = virtio_pci_legacy_get_status,
359 .set_status = virtio_pci_legacy_set_status,
360 .device_reset = virtio_pci_legacy_reset,
361 .get_isr = virtio_pci_legacy_get_isr,
362 .get_queue_size = virtio_pci_legacy_get_queue_num,
363 .set_queue_size = virtio_pci_legacy_set_queue_num,
364 .setup_queue = virtio_pci_legacy_setup_queue,
365 .del_queue = virtio_pci_legacy_del_queue,
366 .notify_queue = virtio_pci_legacy_notify_queue,
367 .set_config_irq = virtio_pci_legacy_set_config_irq,
368 .set_queue_irq = virtio_pci_legacy_set_queue_irq,
369 .get_mac = virtio_pci_legacy_get_mac,
370 .set_mac = virtio_pci_legacy_set_mac,
371 .get_device_status = virtio_pci_legacy_get_device_status,
372 .get_max_queue_pairs = virtio_pci_legacy_get_max_queue_pairs,
373 .get_mtu = virtio_pci_legacy_get_mtu,
374 .device_debug_config_space = virtio_pci_legacy_device_debug_config_space,
378 * fd.io coding-style-patch-verification: ON
381 * eval: (c-set-style "gnu")