i40e: use minimal admin queue for kdump

The minimum size of admin send/receive queue is 1 and 2 respectively.
The admin send queue can't be set to 1 because in that case, the
firmware would fail to init.

Signed-off-by: Coiby Xu <coxu@redhat.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 15f93b3..9067cd3 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -66,6 +66,8 @@
 #define I40E_FDIR_RING_COUNT           32
 #define I40E_MAX_AQ_BUF_SIZE           4096
 #define I40E_AQ_LEN                    256
+#define I40E_MIN_ARQ_LEN               1
+#define I40E_MIN_ASQ_LEN               2
 #define I40E_AQ_WORK_LIMIT             66 /* max number of VFs + a little */
 #define I40E_MAX_USER_PRIORITY         8
 #define I40E_DEFAULT_TRAFFIC_CLASS     BIT(0)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 2d3dbb3..c2d145a 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -15348,8 +15348,13 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
        i40e_check_recovery_mode(pf);
 
-       hw->aq.num_arq_entries = I40E_AQ_LEN;
-       hw->aq.num_asq_entries = I40E_AQ_LEN;
+       if (is_kdump_kernel()) {
+               hw->aq.num_arq_entries = I40E_MIN_ARQ_LEN;
+               hw->aq.num_asq_entries = I40E_MIN_ASQ_LEN;
+       } else {
+               hw->aq.num_arq_entries = I40E_AQ_LEN;
+               hw->aq.num_asq_entries = I40E_AQ_LEN;
+       }
        hw->aq.arq_buf_size = I40E_MAX_AQ_BUF_SIZE;
        hw->aq.asq_buf_size = I40E_MAX_AQ_BUF_SIZE;
        pf->adminq_work_limit = I40E_AQ_WORK_LIMIT;