net/qede/base: allow clients to override VF MSI-X table size

[dpdk.git] / drivers / net / qede / base / ecore_sriov.c

diff --git a/drivers/net/qede/base/ecore_sriov.c b/drivers/net/qede/base/ecore_sriov.c
index 7ac533e..a70ca30 100644 (file)
--- a/drivers/net/qede/base/ecore_sriov.c
+++ b/drivers/net/qede/base/ecore_sriov.c
@@ -818,12 +818,48 @@ static void ecore_iov_vf_igu_set_int(struct ecore_hwfn *p_hwfn,
        ecore_fid_pretend(p_hwfn, p_ptt, (u16)p_hwfn->hw_info.concrete_fid);
 }
 
+static enum _ecore_status_t
+ecore_iov_enable_vf_access_msix(struct ecore_hwfn *p_hwfn,
+                               struct ecore_ptt *p_ptt,
+                               u8 abs_vf_id,
+                               u8 num_sbs)
+{
+       u8 current_max = 0;
+       int i;
+
+       /* If client overrides this, don't do anything */
+       if (p_hwfn->p_dev->b_dont_override_vf_msix)
+               return ECORE_SUCCESS;
+
+       /* For AH onward, configuration is per-PF. Find maximum of all
+        * the currently enabled child VFs, and set the number to be that.
+        */
+       if (!ECORE_IS_BB(p_hwfn->p_dev)) {
+               ecore_for_each_vf(p_hwfn, i) {
+                       struct ecore_vf_info *p_vf;
+
+                       p_vf  = ecore_iov_get_vf_info(p_hwfn, (u16)i, true);
+                       if (!p_vf)
+                               continue;
+
+                       current_max = OSAL_MAX_T(u8, current_max,
+                                                p_vf->num_sbs);
+               }
+       }
+
+       if (num_sbs > current_max)
+               return ecore_mcp_config_vf_msix(p_hwfn, p_ptt,
+                                               abs_vf_id, num_sbs);
+
+       return ECORE_SUCCESS;
+}
+
 static enum _ecore_status_t
 ecore_iov_enable_vf_access(struct ecore_hwfn *p_hwfn,
                           struct ecore_ptt *p_ptt, struct ecore_vf_info *vf)
 {
        u32 igu_vf_conf = IGU_VF_CONF_FUNC_EN;
-       enum _ecore_status_t rc;
+       enum _ecore_status_t rc = ECORE_SUCCESS;
 
        if (vf->to_disable)
                return ECORE_SUCCESS;
@@ -839,9 +875,8 @@ ecore_iov_enable_vf_access(struct ecore_hwfn *p_hwfn,
 
        /* It's possible VF was previously considered malicious */
        vf->b_malicious = false;
-
-       rc = ecore_mcp_config_vf_msix(p_hwfn, p_ptt,
-                                     vf->abs_vf_id, vf->num_sbs);
+       rc = ecore_iov_enable_vf_access_msix(p_hwfn, p_ptt,
+                                            vf->abs_vf_id, vf->num_sbs);
        if (rc != ECORE_SUCCESS)
                return rc;