f0c07c7c7b
Add an option to make the TX mitigation timer adjustable as a device option. The 150us hard coded default used currently is reasonable, but may not be suitable for all workloads, this gives us a way to adjust it using a single binary. We can't support any random option though, so use the "x-" prefix to indicate this is a developer option. Usage: -device virtio-net-pci,x-txtimer=500000,... # .5ms timeout Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
70 lines
2.4 KiB
C
70 lines
2.4 KiB
C
/*
|
|
* QEMU S390x VirtIO BUS definitions
|
|
*
|
|
* Copyright (c) 2009 Alexander Graf <agraf@suse.de>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#define VIRTIO_DEV_OFFS_TYPE 0 /* 8 bits */
|
|
#define VIRTIO_DEV_OFFS_NUM_VQ 1 /* 8 bits */
|
|
#define VIRTIO_DEV_OFFS_FEATURE_LEN 2 /* 8 bits */
|
|
#define VIRTIO_DEV_OFFS_CONFIG_LEN 3 /* 8 bits */
|
|
#define VIRTIO_DEV_OFFS_STATUS 4 /* 8 bits */
|
|
#define VIRTIO_DEV_OFFS_CONFIG 5 /* dynamic */
|
|
|
|
#define VIRTIO_VQCONFIG_OFFS_TOKEN 0 /* 64 bits */
|
|
#define VIRTIO_VQCONFIG_OFFS_ADDRESS 8 /* 64 bits */
|
|
#define VIRTIO_VQCONFIG_OFFS_NUM 16 /* 16 bits */
|
|
#define VIRTIO_VQCONFIG_LEN 24
|
|
|
|
#define VIRTIO_RING_LEN (TARGET_PAGE_SIZE * 3)
|
|
#define S390_DEVICE_PAGES 256
|
|
|
|
typedef struct VirtIOS390Device {
|
|
DeviceState qdev;
|
|
ram_addr_t dev_offs;
|
|
ram_addr_t feat_offs;
|
|
uint8_t feat_len;
|
|
VirtIODevice *vdev;
|
|
BlockConf block;
|
|
NICConf nic;
|
|
uint32_t host_features;
|
|
/* Max. number of ports we can have for a the virtio-serial device */
|
|
uint32_t max_virtserial_ports;
|
|
virtio_net_conf net;
|
|
} VirtIOS390Device;
|
|
|
|
typedef struct VirtIOS390Bus {
|
|
BusState bus;
|
|
|
|
VirtIOS390Device *console;
|
|
ram_addr_t dev_page;
|
|
ram_addr_t dev_offs;
|
|
ram_addr_t next_ring;
|
|
} VirtIOS390Bus;
|
|
|
|
|
|
extern void s390_virtio_device_update_status(VirtIOS390Device *dev);
|
|
|
|
extern VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus);
|
|
extern VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size);
|
|
|
|
extern VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus,
|
|
ram_addr_t mem,
|
|
int *vq_num);
|
|
extern VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus,
|
|
ram_addr_t mem);
|
|
extern void s390_virtio_device_sync(VirtIOS390Device *dev);
|