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Report NTB link speed to console and interface.

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MFC after:	2 weeks
This commit is contained in:
Alexander Motin 2017-04-23 14:25:51 +00:00
parent bfbcb15f76
commit 48c4767756
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=317340
5 changed files with 55 additions and 15 deletions
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17
sys/dev/ntb/if_ntb/if_ntb.c
View File

@ -225,6 +225,7 @@ ntb_net_init(void *arg)
if_t ifp = sc->ifp;
if_setdrvflagbits(ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE);
if_setbaudrate(ifp, ntb_transport_link_speed(sc->queues[0].qp));
if_link_state_change(ifp, ntb_transport_link_query(sc->queues[0].qp) ?
LINK_STATE_UP : LINK_STATE_DOWN);
}
@ -474,20 +475,10 @@ static void
ntb_net_event_handler(void *data, enum ntb_link_event status)
{
struct ntb_net_queue *q = data;
int new_state;
switch (status) {
case NTB_LINK_DOWN:
new_state = LINK_STATE_DOWN;
break;
case NTB_LINK_UP:
new_state = LINK_STATE_UP;
break;
default:
new_state = LINK_STATE_UNKNOWN;
break;
}
if_link_state_change(q->ifp, new_state);
if_setbaudrate(q->ifp, ntb_transport_link_speed(q->qp));
if_link_state_change(q->ifp, (status == NTB_LINK_UP) ? LINK_STATE_UP :
LINK_STATE_DOWN);
}
/* Helper functions */

8
sys/dev/ntb/ntb.c
View File

@ -168,7 +168,15 @@ ntb_link_event(device_t dev)
struct ntb_child **cpp = device_get_softc(dev);
struct ntb_child *nc;
struct rm_priotracker ctx_tracker;
enum ntb_speed speed;
enum ntb_width width;
if (NTB_LINK_IS_UP(dev, &speed, &width)) {
device_printf(dev, "Link is up (PCIe %d.x / x%d)\n",
(int)speed, (int)width);
} else {
device_printf(dev, "Link is down\n");
}
for (nc = *cpp; nc != NULL; nc = nc->next) {
rm_rlock(&nc->ctx_lock, &ctx_tracker);
if (nc->ctx_ops != NULL && nc->ctx_ops->link_event != NULL)

1
sys/dev/ntb/ntb_if.m
View File

@ -38,6 +38,7 @@ HEADER {
NTB_SPEED_GEN1 = 1,
NTB_SPEED_GEN2 = 2,
NTB_SPEED_GEN3 = 3,
NTB_SPEED_GEN4 = 4,
};
enum ntb_width {

43
sys/dev/ntb/ntb_transport.c
View File

@ -202,6 +202,8 @@ struct ntb_transport_ctx {
unsigned qp_count;
uint64_t qp_bitmap;
volatile bool link_is_up;
enum ntb_speed link_speed;
enum ntb_width link_width;
struct callout link_work;
struct callout link_watchdog;
struct task link_cleanup;
@ -1024,7 +1026,7 @@ ntb_transport_event_callback(void *data)
{
struct ntb_transport_ctx *nt = data;
if (ntb_link_is_up(nt->dev, NULL, NULL)) {
if (ntb_link_is_up(nt->dev, &nt->link_speed, &nt->link_width)) {
ntb_printf(1, "HW link up\n");
callout_reset(&nt->link_work, 0, ntb_transport_link_work, nt);
} else {
@ -1105,7 +1107,7 @@ ntb_transport_link_work(void *arg)
for (i = 0; i < nt->mw_count; i++)
ntb_free_mw(nt, i);
out:
if (ntb_link_is_up(dev, NULL, NULL))
if (ntb_link_is_up(dev, &nt->link_speed, &nt->link_width))
callout_reset(&nt->link_work,
NTB_LINK_DOWN_TIMEOUT * hz / 1000, ntb_transport_link_work, nt);
}
@ -1379,6 +1381,43 @@ ntb_transport_link_query(struct ntb_transport_qp *qp)
return (qp->link_is_up);
}
/**
* ntb_transport_link_speed - Query transport link speed
* @qp: NTB transport layer queue to be queried
*
* Query connection speed to the remote system of the NTB transport queue
*
* RETURNS: link speed in bits per second
*/
uint64_t
ntb_transport_link_speed(struct ntb_transport_qp *qp)
{
struct ntb_transport_ctx *nt = qp->transport;
uint64_t rate;
if (!nt->link_is_up)
return (0);
switch (nt->link_speed) {
case NTB_SPEED_GEN1:
rate = 2500000000 * 8 / 10;
break;
case NTB_SPEED_GEN2:
rate = 5000000000 * 8 / 10;
break;
case NTB_SPEED_GEN3:
rate = 8000000000 * 128 / 130;
break;
case NTB_SPEED_GEN4:
rate = 16000000000 * 128 / 130;
break;
default:
return (0);
}
if (nt->link_width <= 0)
return (0);
return (rate * nt->link_width);
}
static void
ntb_send_link_down(struct ntb_transport_qp *qp)
{

1
sys/dev/ntb/ntb_transport.h
View File

@ -58,4 +58,5 @@ void *ntb_transport_rx_remove(struct ntb_transport_qp *qp, unsigned int *len);
void ntb_transport_link_up(struct ntb_transport_qp *qp);
void ntb_transport_link_down(struct ntb_transport_qp *qp);
bool ntb_transport_link_query(struct ntb_transport_qp *qp);
uint64_t ntb_transport_link_speed(struct ntb_transport_qp *qp);
unsigned int ntb_transport_tx_free_entry(struct ntb_transport_qp *qp);