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vhost: add power monitor API

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This commit defines rte_vhost_power_monitor_cond which is used to pass
some information to vhost driver. The information is including the
address to monitor, the expected value, the mask to extract value read
from 'addr', the value size of monitor address, the match flag used to
distinguish the value used to match something or not match something.

Vhost driver can use these information to fill rte_power_monitor_cond.

Signed-off-by: Miao Li <miao.li@intel.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
Acked-by: David Hunt <david.hunt@intel.com>
This commit is contained in:
Miao Li 2021-10-25 14:47:22 +00:00 committed by Maxime Coquelin
parent 64ac7e08f6
commit 34fd4373ce
4 changed files with 87 additions and 0 deletions
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4
doc/guides/rel_notes/release_21_11.rst
View File

@ -199,6 +199,10 @@ New Features
* Added port representors support on SN1000 SmartNICs
* Added flow API transfer proxy support
* **Added power monitor API in vhost library.**
Added an API to support power monitor in vhost library.
* **Updated virtio PMD.**
* Initial support for RSS receive mode has been added to the Virtio PMD,

42
lib/vhost/rte_vhost.h
View File

@ -292,6 +292,31 @@ struct vhost_device_ops {
void *reserved[1]; /**< Reserved for future extension */
};
/**
* Power monitor condition.
*/
struct rte_vhost_power_monitor_cond {
/**< Address to monitor for changes */
volatile void *addr;
/**< If the `mask` is non-zero, location pointed
* to by `addr` will be read and masked, then
* compared with this value.
*/
uint64_t val;
/**< 64-bit mask to extract value read from `addr` */
uint64_t mask;
/**< Data size (in bytes) that will be read from the
* monitored memory location (`addr`).
*/
uint8_t size;
/**< If 1, and masked value that read from 'addr' equals
* 'val', the driver should skip core sleep. If 0, and
* masked value that read from 'addr' does not equal 'val',
* the driver should skip core sleep.
*/
uint8_t match;
};
/**
* Convert guest physical address to host virtual address
*
@ -903,6 +928,23 @@ int rte_vhost_vring_call(int vid, uint16_t vring_idx);
*/
uint32_t rte_vhost_rx_queue_count(int vid, uint16_t qid);
/**
* Get power monitor address of the vhost device
*
* @param vid
* vhost device ID
* @param queue_id
* vhost queue ID
* @param pmc
* power monitor condition
* @return
* 0 on success, -1 on failure
*/
__rte_experimental
int
rte_vhost_get_monitor_addr(int vid, uint16_t queue_id,
struct rte_vhost_power_monitor_cond *pmc);
/**
* Get log base and log size of the vhost device
*

3
lib/vhost/version.map
View File

@ -85,4 +85,7 @@ EXPERIMENTAL {
rte_vhost_async_channel_register_thread_unsafe;
rte_vhost_async_channel_unregister_thread_unsafe;
rte_vhost_clear_queue_thread_unsafe;
# added in 21.11
rte_vhost_get_monitor_addr;
};

38
lib/vhost/vhost.c
View File

@ -1892,5 +1892,43 @@ rte_vhost_async_get_inflight(int vid, uint16_t queue_id)
return ret;
}
int
rte_vhost_get_monitor_addr(int vid, uint16_t queue_id,
struct rte_vhost_power_monitor_cond *pmc)
{
struct virtio_net *dev = get_device(vid);
struct vhost_virtqueue *vq;
if (dev == NULL)
return -1;
if (queue_id >= VHOST_MAX_VRING)
return -1;
vq = dev->virtqueue[queue_id];
if (vq == NULL)
return -1;
if (vq_is_packed(dev)) {
struct vring_packed_desc *desc;
desc = vq->desc_packed;
pmc->addr = &desc[vq->last_avail_idx].flags;
if (vq->avail_wrap_counter)
pmc->val = VRING_DESC_F_AVAIL;
else
pmc->val = VRING_DESC_F_USED;
pmc->mask = VRING_DESC_F_AVAIL | VRING_DESC_F_USED;
pmc->size = sizeof(desc[vq->last_avail_idx].flags);
pmc->match = 1;
} else {
pmc->addr = &vq->avail->idx;
pmc->val = vq->last_avail_idx & (vq->size - 1);
pmc->mask = vq->size - 1;
pmc->size = sizeof(vq->avail->idx);
pmc->match = 0;
}
return 0;
}
RTE_LOG_REGISTER_SUFFIX(vhost_config_log_level, config, INFO);
RTE_LOG_REGISTER_SUFFIX(vhost_data_log_level, data, WARNING);