ixgbe: refactor common start_hw code for 82599 and x540

Factored out the common start_hw code into a new function
ixgbe_start_hw_gen2() so that it can be used by x540 and 82599.

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Acked-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Evan Swanson <evan.swanson@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

4 files changed, 58 insertions, 13 deletions

diff --git a/drivers/net/ixgbe/ixgbe_82599.c b/drivers/net/ixgbe/ixgbe_82599.c
index 32ad4119ff77..09934a82eb30 100644
--- a/drivers/net/ixgbe/ixgbe_82599.c
+++ b/drivers/net/ixgbe/ixgbe_82599.c
@@ -1740,30 +1740,28 @@ static s32 ixgbe_write_analog_reg8_82599(struct ixgbe_hw *hw, u32 reg, u8 val)
  *  ixgbe_start_hw_82599 - Prepare hardware for Tx/Rx
  *  @hw: pointer to hardware structure
  *
- *  Starts the hardware using the generic start_hw function.
- *  Then performs device-specific:
- *  Clears the rate limiter registers.
+ *  Starts the hardware using the generic start_hw function
+ *  and the generation start_hw function.
+ *  Then performs revision-specific operations, if any.
  **/
 static s32 ixgbe_start_hw_82599(struct ixgbe_hw *hw)
 {
-        u32 q_num;
-        s32 ret_val;
+        s32 ret_val = 0;
 
         ret_val = ixgbe_start_hw_generic(hw);
+        if (ret_val != 0)
+                goto out;
 
-        /* Clear the rate limiters */
-        for (q_num = 0; q_num < hw->mac.max_tx_queues; q_num++) {
-                IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, q_num);
-                IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, 0);
-        }
-        IXGBE_WRITE_FLUSH(hw);
+        ret_val = ixgbe_start_hw_gen2(hw);
+        if (ret_val != 0)
+                goto out;
 
         /* We need to run link autotry after the driver loads */
         hw->mac.autotry_restart = true;
 
         if (ret_val == 0)
                 ret_val = ixgbe_verify_fw_version_82599(hw);
-
+out:
         return ret_val;
 }
 
diff --git a/drivers/net/ixgbe/ixgbe_common.c b/drivers/net/ixgbe/ixgbe_common.c
index bcd952916eb2..c66fd957578c 100644
--- a/drivers/net/ixgbe/ixgbe_common.c
+++ b/drivers/net/ixgbe/ixgbe_common.c
@@ -96,6 +96,30 @@ s32 ixgbe_start_hw_generic(struct ixgbe_hw *hw)
 }
 
 /**
+ *  ixgbe_start_hw_gen2 - Init sequence for common device family
+ *  @hw: pointer to hw structure
+ *
+ * Performs the init sequence common to the second generation
+ * of 10 GbE devices.
+ * Devices in the second generation:
+ *     82599
+ *     X540
+ **/
+s32 ixgbe_start_hw_gen2(struct ixgbe_hw *hw)
+{
+        u32 i;
+
+        /* Clear the rate limiters */
+        for (i = 0; i < hw->mac.max_tx_queues; i++) {
+                IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, i);
+                IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, 0);
+        }
+        IXGBE_WRITE_FLUSH(hw);
+
+        return 0;
+}
+
+/**
  *  ixgbe_init_hw_generic - Generic hardware initialization
  *  @hw: pointer to hardware structure
  *
diff --git a/drivers/net/ixgbe/ixgbe_common.h b/drivers/net/ixgbe/ixgbe_common.h
index 508f635fc2ca..2585bf38391d 100644
--- a/drivers/net/ixgbe/ixgbe_common.h
+++ b/drivers/net/ixgbe/ixgbe_common.h
@@ -35,6 +35,7 @@ u32 ixgbe_get_pcie_msix_count_generic(struct ixgbe_hw *hw);
 s32 ixgbe_init_ops_generic(struct ixgbe_hw *hw);
 s32 ixgbe_init_hw_generic(struct ixgbe_hw *hw);
 s32 ixgbe_start_hw_generic(struct ixgbe_hw *hw);
+s32 ixgbe_start_hw_gen2(struct ixgbe_hw *hw);
 s32 ixgbe_clear_hw_cntrs_generic(struct ixgbe_hw *hw);
 s32 ixgbe_read_pba_string_generic(struct ixgbe_hw *hw, u8 *pba_num,
                                   u32 pba_num_size);
diff --git a/drivers/net/ixgbe/ixgbe_x540.c b/drivers/net/ixgbe/ixgbe_x540.c
index 7ce3f45cad71..295c17003d6d 100644
--- a/drivers/net/ixgbe/ixgbe_x540.c
+++ b/drivers/net/ixgbe/ixgbe_x540.c
@@ -226,6 +226,28 @@ mac_reset_top:
 }
 
 /**
+ *  ixgbe_start_hw_X540 - Prepare hardware for Tx/Rx
+ *  @hw: pointer to hardware structure
+ *
+ *  Starts the hardware using the generic start_hw function
+ *  and the generation start_hw function.
+ *  Then performs revision-specific operations, if any.
+ **/
+static s32 ixgbe_start_hw_X540(struct ixgbe_hw *hw)
+{
+        s32 ret_val = 0;
+
+        ret_val = ixgbe_start_hw_generic(hw);
+        if (ret_val != 0)
+                goto out;
+
+        ret_val = ixgbe_start_hw_gen2(hw);
+
+out:
+        return ret_val;
+}
+
+/**
  *  ixgbe_get_supported_physical_layer_X540 - Returns physical layer type
  *  @hw: pointer to hardware structure
  *
@@ -660,7 +682,7 @@ static void ixgbe_release_swfw_sync_semaphore(struct ixgbe_hw *hw)
 static struct ixgbe_mac_operations mac_ops_X540 = {
         .init_hw                = &ixgbe_init_hw_generic,
         .reset_hw               = &ixgbe_reset_hw_X540,
-        .start_hw               = &ixgbe_start_hw_generic,
+        .start_hw               = &ixgbe_start_hw_X540,
         .clear_hw_cntrs         = &ixgbe_clear_hw_cntrs_generic,
         .get_media_type         = &ixgbe_get_media_type_X540,
         .get_supported_physical_layer =