From ca12c9d4213fe8203d58632cd8ad25b5abcc7ef2 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Patryk=20Ma=C5=82ek?= Date: Thu, 10 May 2018 05:59:44 -0700 Subject: [PATCH] i40e: Fix recalculation of MSI-X vectors for VMDq MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch adds a recalculation of number of MSI-X vectors for VMDq in the case where we have less vectors available than we would want to reserve for VMDq. It fixes the issue where we recalculate vectors left and vectors wanted but we didn't take into account the reduced number of queue pairs per VSI. Signed-off-by: Patryk Małek Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_main.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index c8659fbd7111..f17867ab9a90 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -10309,21 +10309,28 @@ static int i40e_init_msix(struct i40e_pf *pf) /* any vectors left over go for VMDq support */ if (pf->flags & I40E_FLAG_VMDQ_ENABLED) { - int vmdq_vecs_wanted = pf->num_vmdq_vsis * pf->num_vmdq_qps; - int vmdq_vecs = min_t(int, vectors_left, vmdq_vecs_wanted); - if (!vectors_left) { pf->num_vmdq_msix = 0; pf->num_vmdq_qps = 0; } else { + int vmdq_vecs_wanted = + pf->num_vmdq_vsis * pf->num_vmdq_qps; + int vmdq_vecs = + min_t(int, vectors_left, vmdq_vecs_wanted); + /* if we're short on vectors for what's desired, we limit * the queues per vmdq. If this is still more than are * available, the user will need to change the number of * queues/vectors used by the PF later with the ethtool * channels command */ - if (vmdq_vecs < vmdq_vecs_wanted) + if (vectors_left < vmdq_vecs_wanted) { pf->num_vmdq_qps = 1; + vmdq_vecs_wanted = pf->num_vmdq_vsis; + vmdq_vecs = min_t(int, + vectors_left, + vmdq_vecs_wanted); + } pf->num_vmdq_msix = pf->num_vmdq_qps; v_budget += vmdq_vecs;