bnxt_en: Add unsupported SFP+ module warnings.

Add the PORT_CONN_NOT_ALLOWED async event handling logic.  The driver
will print an appropriate warning to reflect the SFP+ module enforcement
policy done in the firmware.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 58 insertions, 0 deletions

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index dd0b32c58a24..597e4724a474 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -121,6 +121,7 @@ static const u16 bnxt_vf_req_snif[] = {
 static const u16 bnxt_async_events_arr[] = {
         HWRM_ASYNC_EVENT_CMPL_EVENT_ID_LINK_STATUS_CHANGE,
         HWRM_ASYNC_EVENT_CMPL_EVENT_ID_PF_DRVR_UNLOAD,
+        HWRM_ASYNC_EVENT_CMPL_EVENT_ID_PORT_CONN_NOT_ALLOWED,
 };
 
 static bool bnxt_vf_pciid(enum board_idx idx)
@@ -1236,6 +1237,19 @@ next_rx_no_prod:
         return rc;
 }
 
+#define BNXT_GET_EVENT_PORT(data)       \
+        ((data) &                               \
+         HWRM_ASYNC_EVENT_CMPL_PORT_CONN_NOT_ALLOWED_EVENT_DATA1_PORT_ID_MASK)
+
+#define BNXT_EVENT_POLICY_MASK  \
+        HWRM_ASYNC_EVENT_CMPL_PORT_CONN_NOT_ALLOWED_EVENT_DATA1_ENFORCEMENT_POLICY_MASK
+
+#define BNXT_EVENT_POLICY_SFT   \
+        HWRM_ASYNC_EVENT_CMPL_PORT_CONN_NOT_ALLOWED_EVENT_DATA1_ENFORCEMENT_POLICY_SFT
+
+#define BNXT_GET_EVENT_POLICY(data)     \
+        (((data) & BNXT_EVENT_POLICY_MASK) >> BNXT_EVENT_POLICY_SFT)
+
 static int bnxt_async_event_process(struct bnxt *bp,
                                     struct hwrm_async_event_cmpl *cmpl)
 {
@@ -1249,6 +1263,22 @@ static int bnxt_async_event_process(struct bnxt *bp,
         case HWRM_ASYNC_EVENT_CMPL_EVENT_ID_PF_DRVR_UNLOAD:
                 set_bit(BNXT_HWRM_PF_UNLOAD_SP_EVENT, &bp->sp_event);
                 break;
+        case HWRM_ASYNC_EVENT_CMPL_EVENT_ID_PORT_CONN_NOT_ALLOWED: {
+                u32 data1 = le32_to_cpu(cmpl->event_data1);
+                u16 port_id = BNXT_GET_EVENT_PORT(data1);
+
+                if (BNXT_VF(bp))
+                        break;
+
+                if (bp->pf.port_id != port_id)
+                        break;
+
+                bp->link_info.last_port_module_event =
+                        BNXT_GET_EVENT_POLICY(data1);
+
+                set_bit(BNXT_HWRM_PORT_MODULE_SP_EVENT, &bp->sp_event);
+                break;
+        }
         default:
                 netdev_err(bp->dev, "unhandled ASYNC event (id 0x%x)\n",
                            event_id);
@@ -5447,6 +5477,28 @@ bnxt_restart_timer:
         mod_timer(&bp->timer, jiffies + bp->current_interval);
 }
 
+static void bnxt_port_module_event(struct bnxt *bp)
+{
+        struct bnxt_link_info *link_info = &bp->link_info;
+        struct hwrm_port_phy_qcfg_output *resp = &link_info->phy_qcfg_resp;
+
+        if (bnxt_update_link(bp, true))
+                return;
+
+        if (link_info->last_port_module_event != 0) {
+                netdev_warn(bp->dev, "Unqualified SFP+ module detected on port %d\n",
+                            bp->pf.port_id);
+                if (bp->hwrm_spec_code >= 0x10201) {
+                        netdev_warn(bp->dev, "Module part number %s\n",
+                                    resp->phy_vendor_partnumber);
+                }
+        }
+        if (link_info->last_port_module_event == 1)
+                netdev_warn(bp->dev, "TX is disabled\n");
+        if (link_info->last_port_module_event == 3)
+                netdev_warn(bp->dev, "Shutdown SFP+ module\n");
+}
+
 static void bnxt_cfg_ntp_filters(struct bnxt *);
 
 static void bnxt_sp_task(struct work_struct *work)
@@ -5494,6 +5546,9 @@ static void bnxt_sp_task(struct work_struct *work)
                 rtnl_unlock();
         }
 
+        if (test_and_clear_bit(BNXT_HWRM_PORT_MODULE_SP_EVENT, &bp->sp_event))
+                bnxt_port_module_event(bp);
+
         if (test_and_clear_bit(BNXT_PERIODIC_STATS_SP_EVENT, &bp->sp_event))
                 bnxt_hwrm_port_qstats(bp);
 
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index a981e2c17107..cc8e38a9f684 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -825,6 +825,8 @@ struct bnxt_link_info {
         u16                     req_link_speed;
         u32                     advertising;
         bool                    force_link_chng;
+
+        u8                      last_port_module_event;
         /* a copy of phy_qcfg output used to report link
          * info to VF
          */
@@ -992,6 +994,7 @@ struct bnxt {
 #define BNXT_RST_RING_SP_EVENT          7
 #define BNXT_HWRM_PF_UNLOAD_SP_EVENT    8
 #define BNXT_PERIODIC_STATS_SP_EVENT    9
+#define BNXT_HWRM_PORT_MODULE_SP_EVENT  10
 
         struct bnxt_pf_info     pf;
 #ifdef CONFIG_BNXT_SRIOV