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authorJakub Grajciar <jgrajcia@cisco.com>2018-07-09 12:05:49 +0200
committerDamjan Marion <dmarion@me.com>2018-07-26 10:58:27 +0000
commitae9118055f6236b71145ace400464aa709265ff0 (patch)
tree515772dfbe62c703d791ee8453d1b90521f2cb63 /src/plugins/avf/device.c
parent055b231d25074a2d3cac5d28f3ab0862a57e0630 (diff)
avf: request queues support
Change-Id: I3a4529ff8dae70da99ec95c39ddf788c9498f478 Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
Diffstat (limited to 'src/plugins/avf/device.c')
-rw-r--r--src/plugins/avf/device.c56
1 files changed, 54 insertions, 2 deletions
diff --git a/src/plugins/avf/device.c b/src/plugins/avf/device.c
index 83a3d9cdb10..29dcb99bb4a 100644
--- a/src/plugins/avf/device.c
+++ b/src/plugins/avf/device.c
@@ -661,6 +661,46 @@ retry:
}
clib_error_t *
+avf_request_queues (vlib_main_t * vm, avf_device_t * ad, u16 num_queue_pairs)
+{
+ virtchnl_vf_res_request_t res_req = { 0 };
+ clib_error_t *error;
+ u32 rstat;
+ int n_retry = 20;
+
+ res_req.num_queue_pairs = num_queue_pairs;
+
+ error = avf_send_to_pf (vm, ad, VIRTCHNL_OP_REQUEST_QUEUES, &res_req,
+ sizeof (virtchnl_vf_res_request_t), &res_req,
+ sizeof (virtchnl_vf_res_request_t));
+
+ /*
+ * if PF respondes, the request failed
+ * else PF initializes restart and avf_send_to_pf returns an error
+ */
+ if (!error)
+ {
+ return clib_error_return (0, "requested more than %u queue pairs",
+ res_req.num_queue_pairs);
+ }
+
+retry:
+ vlib_process_suspend (vm, 10e-3);
+ rstat = avf_get_u32 (ad->bar0, AVFGEN_RSTAT);
+
+ if ((rstat == VIRTCHNL_VFR_COMPLETED) || (rstat == VIRTCHNL_VFR_VFACTIVE))
+ goto done;
+
+ if (--n_retry == 0)
+ return clib_error_return (0, "reset failed (timeout)");
+
+ goto retry;
+
+done:
+ return NULL;
+}
+
+clib_error_t *
avf_device_init (vlib_main_t * vm, avf_device_t * ad,
avf_create_if_args_t * args)
{
@@ -672,8 +712,15 @@ avf_device_init (vlib_main_t * vm, avf_device_t * ad,
avf_adminq_init (vm, ad);
- if ((error = avf_device_reset (vm, ad)))
- return error;
+ /* request more queues only if we need them */
+ if ((error = avf_request_queues (vm, ad, tm->n_vlib_mains)))
+ {
+ /* we failed to get more queues, but still we want to proceed */
+ clib_error_free (error);
+
+ if ((error = avf_device_reset (vm, ad)))
+ return error;
+ }
avf_adminq_init (vm, ad);
@@ -768,6 +815,11 @@ avf_process_one_device (vlib_main_t * vm, avf_device_t * ad, int is_irq)
ASSERT (ad->error == 0);
+ /* do not process device in reset state */
+ r = avf_get_u32 (ad->bar0, AVFGEN_RSTAT);
+ if (r != VIRTCHNL_VFR_VFACTIVE)
+ return;
+
r = avf_get_u32 (ad->bar0, AVF_ARQLEN);
if ((r & 0xf0000000) != (1ULL << 31))
{