nfp: disallow mixing vNICs with and without NSP port entry

We only support core NIC apps which have vNICs for each physical port/
split and no representors right now.  Enforce that either each vNIC has
a NSP eth_table entry or if NSP port table is not available none do.

One scenario this will prevent from happening is user force-loading
wrong firmware file if FW app requires different firmwares per media
config.

While at it move some code to nfp_net_pf_alloc_vnic() to make it
counter-match nfp_net_pf_free_vnic() better.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_main.c b/drivers/net/ethernet/netronome/nfp/nfp_net_main.c
index 1281e9019e9288809d4883ecc362e9d41f297e3f..8f267b1534e27b529762da271a87cf799c31aab4 100644 (file)
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_main.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_main.c
@@ -289,7 +289,7 @@ static struct nfp_net *
 nfp_net_pf_alloc_vnic(struct nfp_pf *pf, void __iomem *ctrl_bar,
                      void __iomem *tx_bar, void __iomem *rx_bar,
                      int stride, struct nfp_net_fw_version *fw_ver,
-                     struct nfp_eth_table_port *eth_port)
+                     unsigned int eth_id)
 {
        u32 n_tx_rings, n_rx_rings;
        struct nfp_net *nn;
@@ -310,7 +310,10 @@ nfp_net_pf_alloc_vnic(struct nfp_pf *pf, void __iomem *ctrl_bar,
        nn->dp.is_vf = 0;
        nn->stride_rx = stride;
        nn->stride_tx = stride;
-       nn->eth_port = eth_port;
+       nn->eth_port = nfp_net_find_port(pf->eth_tbl, eth_id);
+
+       pf->num_vnics++;
+       list_add_tail(&nn->vnic_list, &pf->vnics);
 
        return nn;
 }
@@ -346,11 +349,16 @@ nfp_net_pf_alloc_vnics(struct nfp_pf *pf, void __iomem *ctrl_bar,
                       int stride, struct nfp_net_fw_version *fw_ver)
 {
        u32 prev_tx_base, prev_rx_base, tgt_tx_base, tgt_rx_base;
-       struct nfp_eth_table_port *eth_port;
        struct nfp_net *nn;
        unsigned int i;
        int err;
 
+       if (pf->eth_tbl && pf->max_data_vnics != pf->eth_tbl->count) {
+               nfp_err(pf->cpp, "ETH entries don't match vNICs (%d vs %d)\n",
+                       pf->max_data_vnics, pf->eth_tbl->count);
+               return -EINVAL;
+       }
+
        prev_tx_base = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
        prev_rx_base = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
 
@@ -362,21 +370,26 @@ nfp_net_pf_alloc_vnics(struct nfp_pf *pf, void __iomem *ctrl_bar,
                prev_tx_base = tgt_tx_base;
                prev_rx_base = tgt_rx_base;
 
-               eth_port = nfp_net_find_port(pf->eth_tbl, i);
-               if (eth_port && eth_port->override_changed) {
-                       nfp_warn(pf->cpp, "Config changed for port #%d, reboot required before port will be operational\n", i);
-               } else {
-                       nn = nfp_net_pf_alloc_vnic(pf, ctrl_bar, tx_bar, rx_bar,
-                                                  stride, fw_ver, eth_port);
-                       if (IS_ERR(nn)) {
-                               err = PTR_ERR(nn);
-                               goto err_free_prev;
-                       }
-                       list_add_tail(&nn->vnic_list, &pf->vnics);
-                       pf->num_vnics++;
+               nn = nfp_net_pf_alloc_vnic(pf, ctrl_bar, tx_bar, rx_bar,
+                                          stride, fw_ver, i);
+               if (IS_ERR(nn)) {
+                       err = PTR_ERR(nn);
+                       goto err_free_prev;
                }
 
                ctrl_bar += NFP_PF_CSR_SLICE_SIZE;
+
+               /* Check if vNIC has external port associated and cfg is OK */
+               if (pf->eth_tbl && !nn->eth_port) {
+                       nfp_err(pf->cpp, "NSP port entries don't match vNICs (no entry for port #%d)\n", i);
+                       err = -EINVAL;
+                       goto err_free_prev;
+               }
+               if (nn->eth_port && nn->eth_port->override_changed) {
+                       nfp_warn(pf->cpp, "Config changed for port #%d, reboot required before port will be operational\n", i);
+                       nfp_net_pf_free_vnic(pf, nn);
+                       continue;
+               }
        }
 
        if (list_empty(&pf->vnics))
@@ -517,6 +530,9 @@ static void nfp_net_refresh_vnics(struct work_struct *work)
                        continue;
                nn->eth_port = nfp_net_find_port(eth_table,
                                                 nn->eth_port->eth_index);
+               if (!nn->eth_port)
+                       nfp_err(pf->cpp,
+                               "Warning: port disappeared after reconfig\n");
        }
        rtnl_unlock();
 
@@ -524,11 +540,7 @@ static void nfp_net_refresh_vnics(struct work_struct *work)
        pf->eth_tbl = eth_table;
 
        list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
-               if (!nn->eth_port) {
-                       nfp_warn(pf->cpp, "Warning: port not present after reconfig\n");
-                       continue;
-               }
-               if (!nn->eth_port->override_changed)
+               if (nn->eth_port && !nn->eth_port->override_changed)
                        continue;
 
                nn_warn(nn, "Port config changed, unregistering. Reboot required before port will be operational again.\n");