blob: 1426a7035a21e0dcbc2fc40d6d1c80b32eb9c6bd [file] [log] [blame]
/*
* Copyright (c) 2018 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <vlib/vlib.h>
#include <vlib/pci/pci.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/devices/virtio/virtio.h>
#include <vnet/devices/virtio/virtio_pci_legacy.h>
#include <vnet/devices/virtio/pci.h>
#define PCI_CONFIG_SIZE(vif) ((vif->msix_enabled == VIRTIO_MSIX_ENABLED) ? \
24 : 20)
static void
virtio_pci_legacy_read_config (vlib_main_t * vm, virtio_if_t * vif, void *dst,
int len, u32 addr)
{
u32 size = 0;
vlib_pci_dev_handle_t h = vif->pci_dev_handle;
while (len > 0)
{
if (len >= 4)
{
size = 4;
vlib_pci_read_io_u32 (vm, h, PCI_CONFIG_SIZE (vif) + addr, dst);
}
else if (len >= 2)
{
size = 2;
vlib_pci_read_io_u16 (vm, h, PCI_CONFIG_SIZE (vif) + addr, dst);
}
else
{
size = 1;
vlib_pci_read_io_u8 (vm, h, PCI_CONFIG_SIZE (vif) + addr, dst);
}
dst = (u8 *) dst + size;
addr += size;
len -= size;
}
}
static void
virtio_pci_legacy_write_config (vlib_main_t * vm, virtio_if_t * vif,
void *src, int len, u32 addr)
{
u32 size = 0;
vlib_pci_dev_handle_t h = vif->pci_dev_handle;
while (len > 0)
{
if (len >= 4)
{
size = 4;
vlib_pci_write_io_u32 (vm, h, PCI_CONFIG_SIZE (vif) + addr, src);
}
else if (len >= 2)
{
size = 2;
vlib_pci_write_io_u16 (vm, h, PCI_CONFIG_SIZE (vif) + addr, src);
}
else
{
size = 1;
vlib_pci_write_io_u8 (vm, h, PCI_CONFIG_SIZE (vif) + addr, src);
}
src = (u8 *) src + size;
addr += size;
len -= size;
}
}
static u64
virtio_pci_legacy_get_host_features (vlib_main_t * vm, virtio_if_t * vif)
{
u32 host_features;
vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_HOST_FEATURES,
&host_features);
return host_features;
}
static u64
virtio_pci_legacy_get_guest_features (vlib_main_t * vm, virtio_if_t * vif)
{
u32 guest_features = 0;
vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
&guest_features);
vif->features = guest_features;
return guest_features;
}
static void
virtio_pci_legacy_set_guest_features (vlib_main_t * vm, virtio_if_t * vif,
u64 guest_features)
{
if ((guest_features >> 32) != 0)
{
clib_warning ("only 32 bit features are allowed for legacy virtio!");
}
u32 features = 0;
u32 gf = (u32) guest_features;
vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
&gf);
vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
&features);
if (features != (u32) guest_features)
{
clib_warning ("legacy set guest features failed!");
}
}
static u8
virtio_pci_legacy_get_status (vlib_main_t * vm, virtio_if_t * vif)
{
u8 status = 0;
vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &status);
return status;
}
static void
virtio_pci_legacy_set_status (vlib_main_t * vm, virtio_if_t * vif, u8 status)
{
if (status != VIRTIO_CONFIG_STATUS_RESET)
status |= virtio_pci_legacy_get_status (vm, vif);
vlib_pci_write_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &status);
}
static u8
virtio_pci_legacy_reset (vlib_main_t * vm, virtio_if_t * vif)
{
virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_RESET);
return virtio_pci_legacy_get_status (vm, vif);
}
static u8
virtio_pci_legacy_get_isr (vlib_main_t * vm, virtio_if_t * vif)
{
u8 isr = 0;
vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_ISR, &isr);
return isr;
}
static u16
virtio_pci_legacy_get_queue_num (vlib_main_t * vm, virtio_if_t * vif,
u16 queue_id)
{
u16 queue_num = 0;
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
&queue_id);
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NUM,
&queue_num);
return queue_num;
}
static void
virtio_pci_legacy_set_queue_num (vlib_main_t * vm, virtio_if_t * vif,
u16 queue_id, u16 queue_size)
{
/* do nothing */
}
static u8
virtio_pci_legacy_setup_queue (vlib_main_t * vm, virtio_if_t * vif,
u16 queue_id, void *p)
{
u64 addr = vlib_physmem_get_pa (vm, p) >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
u32 addr2 = 0, a = (u32) addr;
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
&queue_id);
vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN, &a);
vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN,
&addr2);
if (addr == addr2)
return 0;
clib_warning ("legacy queue setup failed!");
return 1;
}
static void
virtio_pci_legacy_del_queue (vlib_main_t * vm, virtio_if_t * vif,
u16 queue_id)
{
u32 src = 0;
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
&queue_id);
vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN, &src);
}
static u16
virtio_pci_legacy_get_queue_notify_off (vlib_main_t * vm, virtio_if_t * vif,
u16 queue_id)
{
return 0;
}
inline void
virtio_pci_legacy_notify_queue (vlib_main_t * vm, virtio_if_t * vif,
u16 queue_id, u16 queue_notify_off)
{
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NOTIFY,
&queue_id);
}
/* Enable one vector (0) for Link State Intrerrupt */
static u16
virtio_pci_legacy_set_config_irq (vlib_main_t * vm, virtio_if_t * vif,
u16 vec)
{
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
&vec);
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
&vec);
return vec;
}
static u16
virtio_pci_legacy_set_queue_irq (vlib_main_t * vm, virtio_if_t * vif, u16 vec,
u16 queue_id)
{
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
&queue_id);
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
&vec);
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
&vec);
return vec;
}
static void
virtio_pci_legacy_get_mac (vlib_main_t * vm, virtio_if_t * vif)
{
virtio_pci_legacy_read_config (vm, vif, vif->mac_addr,
sizeof (vif->mac_addr), 0);
}
static void
virtio_pci_legacy_set_mac (vlib_main_t * vm, virtio_if_t * vif)
{
virtio_pci_legacy_write_config (vm, vif, vif->mac_addr,
sizeof (vif->mac_addr), 0);
}
static u16
virtio_pci_legacy_get_device_status (vlib_main_t * vm, virtio_if_t * vif)
{
u16 status = 0;
virtio_pci_legacy_read_config (vm, vif, &status,
sizeof (status),
STRUCT_OFFSET_OF
(virtio_net_config_t, status));
return status;
}
static u16
virtio_pci_legacy_get_max_queue_pairs (vlib_main_t * vm, virtio_if_t * vif)
{
virtio_net_config_t config;
virtio_pci_legacy_read_config (vm, vif, &config.max_virtqueue_pairs,
sizeof (config.max_virtqueue_pairs),
STRUCT_OFFSET_OF
(virtio_net_config_t, max_virtqueue_pairs));
return config.max_virtqueue_pairs;
}
static u16
virtio_pci_legacy_get_mtu (vlib_main_t * vm, virtio_if_t * vif)
{
virtio_net_config_t config;
virtio_pci_legacy_read_config (vm, vif, &config.mtu,
sizeof (config.mtu),
STRUCT_OFFSET_OF (virtio_net_config_t, mtu));
return config.mtu;
}
static void
virtio_pci_legacy_device_debug_config_space (vlib_main_t * vm,
virtio_if_t * vif)
{
u32 data_u32;
u16 data_u16;
u8 data_u8;
vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_HOST_FEATURES,
&data_u32);
vlib_cli_output (vm, "remote features 0x%lx", data_u32);
vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
&data_u32);
vlib_cli_output (vm, "guest features 0x%lx", data_u32);
vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN,
&data_u32);
vlib_cli_output (vm, "queue address 0x%lx", data_u32);
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NUM,
&data_u16);
vlib_cli_output (vm, "queue size 0x%x", data_u16);
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
&data_u16);
vlib_cli_output (vm, "queue select 0x%x", data_u16);
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NOTIFY,
&data_u16);
vlib_cli_output (vm, "queue notify 0x%x", data_u16);
vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &data_u8);
vlib_cli_output (vm, "status 0x%x", data_u8);
vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_ISR, &data_u8);
vlib_cli_output (vm, "isr 0x%x", data_u8);
if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
{
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
&data_u16);
vlib_cli_output (vm, "config vector 0x%x", data_u16);
u16 queue_id = 0;
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
&queue_id);
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
&data_u16);
vlib_cli_output (vm, "queue vector for queue (0) 0x%x", data_u16);
}
u8 mac[6];
virtio_pci_legacy_read_config (vm, vif, mac, sizeof (mac), 0);
vlib_cli_output (vm, "mac %U", format_ethernet_address, mac);
virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16), /* offset to status */
6);
vlib_cli_output (vm, "link up/down status 0x%x", data_u16);
virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16),
/* offset to max_virtqueue */ 8);
vlib_cli_output (vm, "num of virtqueue 0x%x", data_u16);
virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16), /* offset to mtu */
10);
vlib_cli_output (vm, "mtu 0x%x", data_u16);
u32 i = PCI_CONFIG_SIZE (vif) + 12, a = 4;
i += a;
i &= ~a;
for (; i < 64; i += 4)
{
u32 data = 0;
vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, i, &data);
vlib_cli_output (vm, "0x%lx", data);
}
}
const virtio_pci_func_t virtio_pci_legacy_func = {
.read_config = virtio_pci_legacy_read_config,
.write_config = virtio_pci_legacy_write_config,
.get_device_features = virtio_pci_legacy_get_host_features,
.get_driver_features = virtio_pci_legacy_get_guest_features,
.set_driver_features = virtio_pci_legacy_set_guest_features,
.get_status = virtio_pci_legacy_get_status,
.set_status = virtio_pci_legacy_set_status,
.device_reset = virtio_pci_legacy_reset,
.get_isr = virtio_pci_legacy_get_isr,
.get_queue_size = virtio_pci_legacy_get_queue_num,
.set_queue_size = virtio_pci_legacy_set_queue_num,
.setup_queue = virtio_pci_legacy_setup_queue,
.del_queue = virtio_pci_legacy_del_queue,
.get_queue_notify_off = virtio_pci_legacy_get_queue_notify_off,
.notify_queue = virtio_pci_legacy_notify_queue,
.set_config_irq = virtio_pci_legacy_set_config_irq,
.set_queue_irq = virtio_pci_legacy_set_queue_irq,
.get_mac = virtio_pci_legacy_get_mac,
.set_mac = virtio_pci_legacy_set_mac,
.get_device_status = virtio_pci_legacy_get_device_status,
.get_max_queue_pairs = virtio_pci_legacy_get_max_queue_pairs,
.get_mtu = virtio_pci_legacy_get_mtu,
.device_debug_config_space = virtio_pci_legacy_device_debug_config_space,
};
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/