e1000e: fix checks for manageability enabled and management pass-through

The mac->arc_subsystem was being incorrectly used to flag whether or not
manageability was enabled when it should only be used to state whether the
ARC (Host interface) subsystem is available on a particular MAC _and_ only
valid when any manageability is enabled. The ARC subsystem is currently
only available on 80003es2lan and 82573 parts supported by the driver.

A new flag, has_fwsm, is introduced to be used when checking if
manageability is enabled but only on parts that acutally have an FWSM
register. While the above parts have an FWSM register, there are other
parts that have FWSM but do not have support for the ARC subsystem,
namely 82571/2 and ICHx/PCH.

And then there are parts that have manageability, but do not have either
FWSM register or support for the ARC subsystem - these are 82574 and 82583.

For 80003es2lan, 82571/2/3 and ICH/PCH parts, this patch makes no
functional changes, it only corrects the usage of the manageability flags.
For 82574 and 82583, it fixes the incorrect accesses of the non-existent
FWSM register and ARC subsystem as well as corrects the check for
management pass-through.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/e1000e/82571.c b/drivers/net/e1000e/82571.c
index 1e73eddee24a6dc18bb076630f2457f75e8dd845..8bad24da228991b26e70f79b9a45f319a398da33 100644 (file)
--- a/drivers/net/e1000e/82571.c
+++ b/drivers/net/e1000e/82571.c
@@ -234,9 +234,6 @@ static s32 e1000_init_mac_params_82571(struct e1000_adapter *adapter)
        mac->mta_reg_count = 128;
        /* Set rar entry count */
        mac->rar_entry_count = E1000_RAR_ENTRIES;
-       /* Set if manageability features are enabled. */
-       mac->arc_subsystem_valid = (er32(FWSM) & E1000_FWSM_MODE_MASK)
-                       ? true : false;
        /* Adaptive IFS supported */
        mac->adaptive_ifs = true;
 
@@ -271,6 +268,16 @@ static s32 e1000_init_mac_params_82571(struct e1000_adapter *adapter)
                func->set_lan_id = e1000_set_lan_id_single_port;
                func->check_mng_mode = e1000e_check_mng_mode_generic;
                func->led_on = e1000e_led_on_generic;
+
+               /* FWSM register */
+               mac->has_fwsm = true;
+               /*
+                * ARC supported; valid only if manageability features are
+                * enabled.
+                */
+               mac->arc_subsystem_valid =
+                       (er32(FWSM) & E1000_FWSM_MODE_MASK)
+                       ? true : false;
                break;
        case e1000_82574:
        case e1000_82583:
@@ -281,6 +288,9 @@ static s32 e1000_init_mac_params_82571(struct e1000_adapter *adapter)
        default:
                func->check_mng_mode = e1000e_check_mng_mode_generic;
                func->led_on = e1000e_led_on_generic;
+
+               /* FWSM register */
+               mac->has_fwsm = true;
                break;
        }
 
@@ -993,9 +1003,10 @@ static s32 e1000_init_hw_82571(struct e1000_hw *hw)
        /* ...for both queues. */
        switch (mac->type) {
        case e1000_82573:
+               e1000e_enable_tx_pkt_filtering(hw);
+               /* fall through */
        case e1000_82574:
        case e1000_82583:
-               e1000e_enable_tx_pkt_filtering(hw);
                reg_data = er32(GCR);
                reg_data |= E1000_GCR_L1_ACT_WITHOUT_L0S_RX;
                ew32(GCR, reg_data);

diff --git a/drivers/net/e1000e/defines.h b/drivers/net/e1000e/defines.h
index 227147f09af2cd50263dcb756c42d4210828892b..4dc02c71ffd6094417f7d742e0c2e768382fddd4 100644 (file)
--- a/drivers/net/e1000e/defines.h
+++ b/drivers/net/e1000e/defines.h
@@ -629,6 +629,8 @@
 #define NVM_ALT_MAC_ADDR_PTR       0x0037
 #define NVM_CHECKSUM_REG           0x003F
 
+#define E1000_NVM_INIT_CTRL2_MNGM 0x6000 /* Manageability Operation Mode mask */
+
 #define E1000_NVM_CFG_DONE_PORT_0  0x40000 /* MNG config cycle done */
 #define E1000_NVM_CFG_DONE_PORT_1  0x80000 /* ...for second port */
 

diff --git a/drivers/net/e1000e/es2lan.c b/drivers/net/e1000e/es2lan.c
index 27d21589a69afa128e7a6f0be459703a6e917053..7fcac7827865895e18f7c4f7fce0c4d6aa6d67a5 100644 (file)
--- a/drivers/net/e1000e/es2lan.c
+++ b/drivers/net/e1000e/es2lan.c
@@ -221,9 +221,12 @@ static s32 e1000_init_mac_params_80003es2lan(struct e1000_adapter *adapter)
        mac->mta_reg_count = 128;
        /* Set rar entry count */
        mac->rar_entry_count = E1000_RAR_ENTRIES;
-       /* Set if manageability features are enabled. */
-       mac->arc_subsystem_valid = (er32(FWSM) & E1000_FWSM_MODE_MASK)
-                        ? true : false;
+       /* FWSM register */
+       mac->has_fwsm = true;
+       /* ARC supported; valid only if manageability features are enabled. */
+       mac->arc_subsystem_valid =
+               (er32(FWSM) & E1000_FWSM_MODE_MASK)
+                       ? true : false;
        /* Adaptive IFS not supported */
        mac->adaptive_ifs = false;
 

diff --git a/drivers/net/e1000e/hw.h b/drivers/net/e1000e/hw.h
index 6f66c37213495278bb4ef8855dc45efcf005d94b..287ee954448f42ed626f655186872ff467a6f4e8 100644 (file)
--- a/drivers/net/e1000e/hw.h
+++ b/drivers/net/e1000e/hw.h
@@ -830,6 +830,7 @@ struct e1000_mac_info {
        u8  forced_speed_duplex;
 
        bool adaptive_ifs;
+       bool has_fwsm;
        bool arc_subsystem_valid;
        bool autoneg;
        bool autoneg_failed;

diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c
index e1f244a478076ccf21d0a055404bb202ebe7f703..8efe9a7cbaadaf3aa0040d496928b667c2ca883c 100644 (file)
--- a/drivers/net/e1000e/ich8lan.c
+++ b/drivers/net/e1000e/ich8lan.c
@@ -503,8 +503,10 @@ static s32 e1000_init_mac_params_ich8lan(struct e1000_adapter *adapter)
        mac->rar_entry_count = E1000_ICH_RAR_ENTRIES;
        if (mac->type == e1000_ich8lan)
                mac->rar_entry_count--;
-       /* Set if manageability features are enabled. */
-       mac->arc_subsystem_valid = true;
+       /* FWSM register */
+       mac->has_fwsm = true;
+       /* ARC subsystem not supported */
+       mac->arc_subsystem_valid = false;
        /* Adaptive IFS supported */
        mac->adaptive_ifs = true;
 

diff --git a/drivers/net/e1000e/lib.c b/drivers/net/e1000e/lib.c
index b32361dc340e8474b2c6542efc145fe252925479..a968e3a416ac4609678426ce25cc7ce484d16727 100644 (file)
--- a/drivers/net/e1000e/lib.c
+++ b/drivers/net/e1000e/lib.c
@@ -2272,6 +2272,11 @@ static s32 e1000_mng_enable_host_if(struct e1000_hw *hw)
        u32 hicr;
        u8 i;
 
+       if (!(hw->mac.arc_subsystem_valid)) {
+               e_dbg("ARC subsystem not valid.\n");
+               return -E1000_ERR_HOST_INTERFACE_COMMAND;
+       }
+
        /* Check that the host interface is enabled. */
        hicr = er32(HICR);
        if ((hicr & E1000_HICR_EN) == 0) {
@@ -2530,9 +2535,9 @@ bool e1000e_enable_mng_pass_thru(struct e1000_hw *hw)
        manc = er32(MANC);
 
        if (!(manc & E1000_MANC_RCV_TCO_EN))
-               return ret_val;
+               goto out;
 
-       if (hw->mac.arc_subsystem_valid) {
+       if (hw->mac.has_fwsm) {
                fwsm = er32(FWSM);
                factps = er32(FACTPS);
 
@@ -2540,16 +2545,28 @@ bool e1000e_enable_mng_pass_thru(struct e1000_hw *hw)
                    ((fwsm & E1000_FWSM_MODE_MASK) ==
                     (e1000_mng_mode_pt << E1000_FWSM_MODE_SHIFT))) {
                        ret_val = true;
-                       return ret_val;
+                       goto out;
                }
-       } else {
-               if ((manc & E1000_MANC_SMBUS_EN) &&
-                   !(manc & E1000_MANC_ASF_EN)) {
+       } else if ((hw->mac.type == e1000_82574) ||
+                  (hw->mac.type == e1000_82583)) {
+               u16 data;
+
+               factps = er32(FACTPS);
+               e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &data);
+
+               if (!(factps & E1000_FACTPS_MNGCG) &&
+                   ((data & E1000_NVM_INIT_CTRL2_MNGM) ==
+                    (e1000_mng_mode_pt << 13))) {
                        ret_val = true;
-                       return ret_val;
+                       goto out;
                }
+       } else if ((manc & E1000_MANC_SMBUS_EN) &&
+                   !(manc & E1000_MANC_ASF_EN)) {
+                       ret_val = true;
+                       goto out;
        }
 
+out:
        return ret_val;
 }