net/mlx4: Adapt num_vfs/probed_vf params for single port VF

A new syntax is added for the module parameters num_vfs and probe_vf.

  num_vfs=p1,p2,p1+p2
  probe_bf=p1,p2,p1+p2

Where p1(2) is the number of VFs on / probed VFs for physical
port1(2) and p1+p2 is the number of dual port VFs.

Single port VFs are currently supported only when the link type
for both ports of the device is Ethernet.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 34 insertions, 13 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 472925428de7..61d7bcff4533 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -77,13 +77,17 @@ MODULE_PARM_DESC(msi_x, "attempt to use MSI-X if nonzero");
 
 #endif /* CONFIG_PCI_MSI */
 
-static int num_vfs;
-module_param(num_vfs, int, 0444);
-MODULE_PARM_DESC(num_vfs, "enable #num_vfs functions if num_vfs > 0");
-
-static int probe_vf;
-module_param(probe_vf, int, 0644);
-MODULE_PARM_DESC(probe_vf, "number of vfs to probe by pf driver (num_vfs > 0)");
+static uint8_t num_vfs[3] = {0, 0, 0};
+static int num_vfs_argc = 3;
+module_param_array(num_vfs, byte , &num_vfs_argc, 0444);
+MODULE_PARM_DESC(num_vfs, "enable #num_vfs functions if num_vfs > 0\n"
+                          "num_vfs=port1,port2,port1+2");
+
+static uint8_t probe_vf[3] = {0, 0, 0};
+static int probe_vfs_argc = 3;
+module_param_array(probe_vf, byte, &probe_vfs_argc, 0444);
+MODULE_PARM_DESC(probe_vf, "number of vfs to probe by pf driver (num_vfs > 0)\n"
+                           "probe_vf=port1,port2,port1+2");
 
 int mlx4_log_num_mgm_entry_size = MLX4_DEFAULT_MGM_LOG_ENTRY_SIZE;
 module_param_named(log_num_mgm_entry_size,
@@ -2193,7 +2197,10 @@ static int __mlx4_init_one(struct pci_dev *pdev, int pci_dev_data)
         struct mlx4_dev *dev;
         int err;
         int port;
-        int nvfs[MLX4_MAX_PORTS + 1], prb_vf[MLX4_MAX_PORTS + 1];
+        int nvfs[MLX4_MAX_PORTS + 1] = {0, 0, 0};
+        int prb_vf[MLX4_MAX_PORTS + 1] = {0, 0, 0};
+        const int param_map[MLX4_MAX_PORTS + 1][MLX4_MAX_PORTS + 1] = {
+                {2, 0, 0}, {0, 1, 2}, {0, 1, 2} };
         unsigned total_vfs = 0;
         int sriov_initialized = 0;
         unsigned int i;
@@ -2211,16 +2218,17 @@ static int __mlx4_init_one(struct pci_dev *pdev, int pci_dev_data)
          * per port, we must limit the number of VFs to 63 (since their are
          * 128 MACs)
          */
-        for (i = 0; i < sizeof(nvfs)/sizeof(nvfs[0]);
-             total_vfs += nvfs[i], i++) {
-                nvfs[i] = i == MLX4_MAX_PORTS ? num_vfs : 0;
+        for (i = 0; i < sizeof(nvfs)/sizeof(nvfs[0]) && i < num_vfs_argc;
+             total_vfs += nvfs[param_map[num_vfs_argc - 1][i]], i++) {
+                nvfs[param_map[num_vfs_argc - 1][i]] = num_vfs[i];
                 if (nvfs[i] < 0) {
                         dev_err(&pdev->dev, "num_vfs module parameter cannot be negative\n");
                         return -EINVAL;
                 }
         }
-        for (i = 0; i < sizeof(prb_vf)/sizeof(prb_vf[0]); i++) {
-                prb_vf[i] = i == MLX4_MAX_PORTS ? probe_vf : 0;
+        for (i = 0; i < sizeof(prb_vf)/sizeof(prb_vf[0]) && i < probe_vfs_argc;
+             i++) {
+                prb_vf[param_map[probe_vfs_argc - 1][i]] = probe_vf[i];
                 if (prb_vf[i] < 0 || prb_vf[i] > nvfs[i]) {
                         dev_err(&pdev->dev, "probe_vf module parameter cannot be negative or greater than num_vfs\n");
                         return -EINVAL;
@@ -2450,6 +2458,19 @@ slave_start:
                         goto err_close;
                 }
                 if (sriov_initialized) {
+                        int ib_ports = 0;
+                        mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
+                                ib_ports++;
+
+                        if (ib_ports &&
+                            (num_vfs_argc > 1 || probe_vfs_argc > 1)) {
+                                mlx4_err(dev,
+                                         "Invalid syntax of num_vfs/probe_vfs "
+                                         "with IB port. Single port VFs syntax"
+                                         " is only supported when all ports "
+                                         "are configured as ethernet\n");
+                                goto err_close;
+                        }
                         for (i = 0; i < sizeof(nvfs)/sizeof(nvfs[0]); i++) {
                                 unsigned j;
                                 for (j = 0; j < nvfs[i]; ++sum, ++j) {