Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue

Jeff Kirsher says:

====================
100GbE Intel Wired LAN Driver Updates 2018-09-27

This series contains fixes to the ice driver only.

Jake fixes a potential crash due to attempting to access the mutex which
is already destroyed.  Fix this by using rq.count and sq.count to
determine if the queue was initialized.  Fixed the current logic for
checking the firmware version to properly handle situations when
firmware major/minor versions differ and when the branch version
differs.

Bruce replaces a memcpy() with a direct assignment, which is preferred.
Also updated the branding strings and device ids supported by the
driver.  Fixed the "ethtool -G" command in the driver, which was always
returning EINVAL when changing the descriptor ring size.

Brett update and clarified code comments.

Anirudh updates the driver to ensure we query the firmware for the
transmit scheduler node information before adding it to the driver
database, to ensure we have the current information.  Also update the
"get capabilities" command to get device and function capabilities.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 34 insertions, 16 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c
index 0847dbf9d42fa..decfdb065a205 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.c
+++ b/drivers/net/ethernet/intel/ice/ice_common.c
@@ -1451,7 +1451,7 @@ ice_parse_caps(struct ice_hw *hw, void *buf, u32 cap_count,
  * @hw: pointer to the hw struct
  * @buf: a virtual buffer to hold the capabilities
  * @buf_size: Size of the virtual buffer
- * @data_size: Size of the returned data, or buf size needed if AQ err==ENOMEM
+ * @cap_count: cap count needed if AQ err==ENOMEM
  * @opc: capabilities type to discover - pass in the command opcode
  * @cd: pointer to command details structure or NULL
  *
@@ -1459,7 +1459,7 @@ ice_parse_caps(struct ice_hw *hw, void *buf, u32 cap_count,
  * the firmware.
  */
 static enum ice_status
-ice_aq_discover_caps(struct ice_hw *hw, void *buf, u16 buf_size, u16 *data_size,
+ice_aq_discover_caps(struct ice_hw *hw, void *buf, u16 buf_size, u32 *cap_count,
 		     enum ice_adminq_opc opc, struct ice_sq_cd *cd)
 {
 	struct ice_aqc_list_caps *cmd;
@@ -1477,59 +1477,77 @@ ice_aq_discover_caps(struct ice_hw *hw, void *buf, u16 buf_size, u16 *data_size,
 	status = ice_aq_send_cmd(hw, &desc, buf, buf_size, cd);
 	if (!status)
 		ice_parse_caps(hw, buf, le32_to_cpu(cmd->count), opc);
-	*data_size = le16_to_cpu(desc.datalen);
-
+	else if (hw->adminq.sq_last_status == ICE_AQ_RC_ENOMEM)
+		*cap_count =
+			DIV_ROUND_UP(le16_to_cpu(desc.datalen),
+				     sizeof(struct ice_aqc_list_caps_elem));
 	return status;
 }
 
 /**
- * ice_get_caps - get info about the HW
+ * ice_discover_caps - get info about the HW
  * @hw: pointer to the hardware structure
+ * @opc: capabilities type to discover - pass in the command opcode
  */
-enum ice_status ice_get_caps(struct ice_hw *hw)
+static enum ice_status ice_discover_caps(struct ice_hw *hw,
+					 enum ice_adminq_opc opc)
 {
 	enum ice_status status;
-	u16 data_size = 0;
+	u32 cap_count;
 	u16 cbuf_len;
 	u8 retries;
 
 	/* The driver doesn't know how many capabilities the device will return
 	 * so the buffer size required isn't known ahead of time. The driver
 	 * starts with cbuf_len and if this turns out to be insufficient, the
-	 * device returns ICE_AQ_RC_ENOMEM and also the buffer size it needs.
-	 * The driver then allocates the buffer of this size and retries the
-	 * operation. So it follows that the retry count is 2.
+	 * device returns ICE_AQ_RC_ENOMEM and also the cap_count it needs.
+	 * The driver then allocates the buffer based on the count and retries
+	 * the operation. So it follows that the retry count is 2.
 	 */
 #define ICE_GET_CAP_BUF_COUNT	40
 #define ICE_GET_CAP_RETRY_COUNT	2
 
-	cbuf_len = ICE_GET_CAP_BUF_COUNT *
-		sizeof(struct ice_aqc_list_caps_elem);
-
+	cap_count = ICE_GET_CAP_BUF_COUNT;
 	retries = ICE_GET_CAP_RETRY_COUNT;
 
 	do {
 		void *cbuf;
 
+		cbuf_len = (u16)(cap_count *
+				 sizeof(struct ice_aqc_list_caps_elem));
 		cbuf = devm_kzalloc(ice_hw_to_dev(hw), cbuf_len, GFP_KERNEL);
 		if (!cbuf)
 			return ICE_ERR_NO_MEMORY;
 
-		status = ice_aq_discover_caps(hw, cbuf, cbuf_len, &data_size,
-					      ice_aqc_opc_list_func_caps, NULL);
+		status = ice_aq_discover_caps(hw, cbuf, cbuf_len, &cap_count,
+					      opc, NULL);
 		devm_kfree(ice_hw_to_dev(hw), cbuf);
 
 		if (!status || hw->adminq.sq_last_status != ICE_AQ_RC_ENOMEM)
 			break;
 
 		/* If ENOMEM is returned, try again with bigger buffer */
-		cbuf_len = data_size;
 	} while (--retries);
 
 	return status;
 }
 
 /**
+ * ice_get_caps - get info about the HW
+ * @hw: pointer to the hardware structure
+ */
+enum ice_status ice_get_caps(struct ice_hw *hw)
+{
+	enum ice_status status;
+
+	status = ice_discover_caps(hw, ice_aqc_opc_list_dev_caps);
+	if (!status)
+		status = ice_discover_caps(hw, ice_aqc_opc_list_func_caps);
+
+	return status;
+}
+
+/**
  * ice_aq_manage_mac_write - manage MAC address write command
  * @hw: pointer to the hw struct
  * @mac_addr: MAC address to be written as LAA/LAA+WoL/Port address