Merge branch 'Update-license-and-polish-ENA-driver-code'

Shay Agroskin says:

====================
Update license and polish ENA driver code

This series adds the following:
- Change driver's license into SPDX format
- Capitalize all log prints in ENA driver
- Fix issues raised by static checkers
- Improve code readability by adding functions, fix spelling
  mistakes etc.
- Update driver's documentation

Changed from previous version:
v1->v2: dropped patch that transforms pr_* log prints into dev_* prints
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/networking/device_drivers/ethernet/amazon/ena.rst

@@ -39,16 +39,6 @@ debug logs.
 Some of the ENA devices support a working mode called Low-latency
 Queue (LLQ), which saves several more microseconds.
 
-Supported PCI vendor ID/device IDs
-==================================
-
-=========   =======================
-1d0f:0ec2   ENA PF
-1d0f:1ec2   ENA PF with LLQ support
-1d0f:ec20   ENA VF
-1d0f:ec21   ENA VF with LLQ support
-=========   =======================
-
 ENA Source Code Directory Structure
 ===================================
 
@@ -212,20 +202,11 @@ In adaptive interrupt moderation mode the interrupt delay value is
 updated by the driver dynamically and adjusted every NAPI cycle
 according to the traffic nature.
 
-By default ENA driver applies adaptive coalescing on Rx traffic and
-conventional coalescing on Tx traffic.
-
 Adaptive coalescing can be switched on/off through ethtool(8)
 adaptive_rx on|off parameter.
 
-The driver chooses interrupt delay value according to the number of
-bytes and packets received between interrupt unmasking and interrupt
-posting. The driver uses interrupt delay table that subdivides the
-range of received bytes/packets into 5 levels and assigns interrupt
-delay value to each level.
-
-The user can enable/disable adaptive moderation, modify the interrupt
-delay table and restore its default values through sysfs.
+More information about Adaptive Interrupt Moderation (DIM) can be found in
+Documentation/networking/net_dim.rst
 
 RX copybreak
 ============
@@ -274,7 +255,7 @@ RSS
   inputs for hash functions.
 - The driver configures RSS settings using the AQ SetFeature command
   (ENA_ADMIN_RSS_HASH_FUNCTION, ENA_ADMIN_RSS_HASH_INPUT and
-  ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG properties).
+  ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG properties).
 - If the NETIF_F_RXHASH flag is set, the 32-bit result of the hash
   function delivered in the Rx CQ descriptor is set in the received
   SKB.

drivers/net/ethernet/amazon/ena/ena_admin_defs.h

+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
 /*
- * Copyright 2015 - 2016 Amazon.com, Inc. or its affiliates.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
+ * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
  */
 #ifndef _ENA_ADMIN_H_
 #define _ENA_ADMIN_H_
 
+#define ENA_ADMIN_RSS_KEY_PARTS              10
 
 enum ena_admin_aq_opcode {
 	ENA_ADMIN_CREATE_SQ                         = 1,
@@ -55,6 +29,7 @@ enum ena_admin_aq_completion_status {
 	ENA_ADMIN_RESOURCE_BUSY                     = 7,
 };
 
+/* subcommands for the set/get feature admin commands */
 enum ena_admin_aq_feature_id {
 	ENA_ADMIN_DEVICE_ATTRIBUTES                 = 1,
 	ENA_ADMIN_MAX_QUEUES_NUM                    = 2,
@@ -63,7 +38,7 @@ enum ena_admin_aq_feature_id {
 	ENA_ADMIN_MAX_QUEUES_EXT                    = 7,
 	ENA_ADMIN_RSS_HASH_FUNCTION                 = 10,
 	ENA_ADMIN_STATELESS_OFFLOAD_CONFIG          = 11,
-	ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG      = 12,
+	ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG      = 12,
 	ENA_ADMIN_MTU                               = 14,
 	ENA_ADMIN_RSS_HASH_INPUT                    = 18,
 	ENA_ADMIN_INTERRUPT_MODERATION              = 20,
@@ -195,7 +170,7 @@ struct ena_admin_acq_common_desc {
 	u16 extended_status;
 
 	/* indicates to the driver which AQ entry has been consumed by the
-	 *    device and could be reused
+	 * device and could be reused
 	 */
 	u16 sq_head_indx;
 };
@@ -240,8 +215,8 @@ struct ena_admin_aq_create_sq_cmd {
 	 */
 	u8 sq_caps_3;
 
-	/* associated completion queue id. This CQ must be created prior to
-	 *    SQ creation
+	/* associated completion queue id. This CQ must be created prior to SQ
+	 * creation
 	 */
 	u16 cq_idx;
 
@@ -380,7 +355,7 @@ struct ena_admin_aq_get_stats_cmd {
 	u16 queue_idx;
 
 	/* device id, value 0xFFFF means mine. only privileged device can get
-	 *    stats of other device
+	 * stats of other device
 	 */
 	u16 device_id;
 };
@@ -475,7 +450,9 @@ struct ena_admin_device_attr_feature_desc {
 
 	u32 device_version;
 
-	/* bitmap of ena_admin_aq_feature_id */
+	/* bitmap of ena_admin_aq_feature_id, which represents supported
+	 * subcommands for the set/get feature admin commands.
+	 */
 	u32 supported_features;
 
 	u32 reserved3;
@@ -561,32 +538,30 @@ struct ena_admin_feature_llq_desc {
 
 	u32 max_llq_depth;
 
-	/*  specify the header locations the device supports. bitfield of
-	 *    enum ena_admin_llq_header_location.
+	/* specify the header locations the device supports. bitfield of enum
+	 * ena_admin_llq_header_location.
 	 */
 	u16 header_location_ctrl_supported;
 
 	/* the header location the driver selected to use. */
 	u16 header_location_ctrl_enabled;
 
-	/* if inline header is specified - this is the size of descriptor
-	 *    list entry. If header in a separate ring is specified - this is
-	 *    the size of header ring entry. bitfield of enum
-	 *    ena_admin_llq_ring_entry_size. specify the entry sizes the device
-	 *    supports
+	/* if inline header is specified - this is the size of descriptor list
+	 * entry. If header in a separate ring is specified - this is the size
+	 * of header ring entry. bitfield of enum ena_admin_llq_ring_entry_size.
+	 * specify the entry sizes the device supports
 	 */
 	u16 entry_size_ctrl_supported;
 
 	/* the entry size the driver selected to use. */
 	u16 entry_size_ctrl_enabled;
 
-	/* valid only if inline header is specified. First entry associated
-	 *    with the packet includes descriptors and header. Rest of the
-	 *    entries occupied by descriptors. This parameter defines the max
-	 *    number of descriptors precedding the header in the first entry.
-	 *    The field is bitfield of enum
-	 *    ena_admin_llq_num_descs_before_header and specify the values the
-	 *    device supports
+	/* valid only if inline header is specified. First entry associated with
+	 * the packet includes descriptors and header. Rest of the entries
+	 * occupied by descriptors. This parameter defines the max number of
+	 * descriptors precedding the header in the first entry. The field is
+	 * bitfield of enum ena_admin_llq_num_descs_before_header and specify
+	 * the values the device supports
 	 */
 	u16 desc_num_before_header_supported;
 
@@ -594,7 +569,7 @@ struct ena_admin_feature_llq_desc {
 	u16 desc_num_before_header_enabled;
 
 	/* valid only if inline was chosen. bitfield of enum
-	 *    ena_admin_llq_stride_ctrl
+	 * ena_admin_llq_stride_ctrl
 	 */
 	u16 descriptors_stride_ctrl_supported;
 
@@ -629,8 +604,8 @@ struct ena_admin_queue_ext_feature_fields {
 
 	u32 max_tx_header_size;
 
-	/* Maximum Descriptors number, including meta descriptor, allowed for
-	 * a single Tx packet
+	/* Maximum Descriptors number, including meta descriptor, allowed for a
+	 * single Tx packet
 	 */
 	u16 max_per_packet_tx_descs;
 
@@ -653,8 +628,8 @@ struct ena_admin_queue_feature_desc {
 
 	u32 max_header_size;
 
-	/* Maximum Descriptors number, including meta descriptor, allowed for
-	 *    a single Tx packet
+	/* Maximum Descriptors number, including meta descriptor, allowed for a
+	 * single Tx packet
 	 */
 	u16 max_packet_tx_descs;
 
@@ -742,11 +717,11 @@ enum ena_admin_hash_functions {
 };
 
 struct ena_admin_feature_rss_flow_hash_control {
-	u32 keys_num;
+	u32 key_parts;
 
 	u32 reserved;
 
-	u32 key[10];
+	u32 key[ENA_ADMIN_RSS_KEY_PARTS];
 };
 
 struct ena_admin_feature_rss_flow_hash_function {
@@ -1042,7 +1017,7 @@ struct ena_admin_set_feat_resp {
 struct ena_admin_aenq_common_desc {
 	u16 group;
 
-	u16 syndrom;
+	u16 syndrome;
 
 	/* 0 : phase
 	 * 7:1 : reserved - MBZ
@@ -1066,7 +1041,7 @@ enum ena_admin_aenq_group {
 	ENA_ADMIN_AENQ_GROUPS_NUM                   = 5,
 };
 
-enum ena_admin_aenq_notification_syndrom {
+enum ena_admin_aenq_notification_syndrome {
 	ENA_ADMIN_SUSPEND                           = 0,
 	ENA_ADMIN_RESUME                            = 1,
 	ENA_ADMIN_UPDATE_HINTS                      = 2,

drivers/net/ethernet/amazon/ena/ena_com.h

+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
 /*
- * Copyright 2015 Amazon.com, Inc. or its affiliates.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
+ * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
  */
 
 #ifndef ENA_COM
@@ -536,7 +509,7 @@ void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev);
  * This method goes over the async event notification queue and calls the proper
  * aenq handler.
  */
-void ena_com_aenq_intr_handler(struct ena_com_dev *dev, void *data);
+void ena_com_aenq_intr_handler(struct ena_com_dev *ena_dev, void *data);
 
 /* ena_com_abort_admin_commands - Abort all the outstanding admin commands.
  * @ena_dev: ENA communication layer struct

drivers/net/ethernet/amazon/ena/ena_common_defs.h

+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
 /*
- * Copyright 2015 - 2016 Amazon.com, Inc. or its affiliates.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
+ * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
  */
 #ifndef _ENA_COMMON_H_
 #define _ENA_COMMON_H_

drivers/net/ethernet/amazon/ena/ena_eth_com.c

+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
 /*
- * Copyright 2015 Amazon.com, Inc. or its affiliates.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
+ * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
  */
 
 #include "ena_eth_com.h"
@@ -45,8 +18,9 @@ static struct ena_eth_io_rx_cdesc_base *ena_com_get_next_rx_cdesc(
 	cdesc = (struct ena_eth_io_rx_cdesc_base *)(io_cq->cdesc_addr.virt_addr
 			+ (head_masked * io_cq->cdesc_entry_size_in_bytes));
 
-	desc_phase = (READ_ONCE(cdesc->status) & ENA_ETH_IO_RX_CDESC_BASE_PHASE_MASK) >>
-			ENA_ETH_IO_RX_CDESC_BASE_PHASE_SHIFT;
+	desc_phase = (READ_ONCE(cdesc->status) &
+		      ENA_ETH_IO_RX_CDESC_BASE_PHASE_MASK) >>
+		     ENA_ETH_IO_RX_CDESC_BASE_PHASE_SHIFT;
 
 	if (desc_phase != expected_phase)
 		return NULL;
@@ -89,7 +63,7 @@ static int ena_com_write_bounce_buffer_to_dev(struct ena_com_io_sq *io_sq,
 		}
 
 		io_sq->entries_in_tx_burst_left--;
-		pr_debug("decreasing entries_in_tx_burst_left of queue %d to %d\n",
+		pr_debug("Decreasing entries_in_tx_burst_left of queue %d to %d\n",
 			 io_sq->qid, io_sq->entries_in_tx_burst_left);
 	}
 
@@ -128,12 +102,12 @@ static int ena_com_write_header_to_bounce(struct ena_com_io_sq *io_sq,
 
 	if (unlikely((header_offset + header_len) >
 		     llq_info->desc_list_entry_size)) {
-		pr_err("trying to write header larger than llq entry can accommodate\n");
+		pr_err("Trying to write header larger than llq entry can accommodate\n");
 		return -EFAULT;
 	}
 
 	if (unlikely(!bounce_buffer)) {
-		pr_err("bounce buffer is NULL\n");
+		pr_err("Bounce buffer is NULL\n");
 		return -EFAULT;
 	}
 
@@ -151,7 +125,7 @@ static void *get_sq_desc_llq(struct ena_com_io_sq *io_sq)
 	bounce_buffer = pkt_ctrl->curr_bounce_buf;
 
 	if (unlikely(!bounce_buffer)) {
-		pr_err("bounce buffer is NULL\n");
+		pr_err("Bounce buffer is NULL\n");
 		return NULL;
 	}
 
@@ -262,8 +236,9 @@ static u16 ena_com_cdesc_rx_pkt_get(struct ena_com_io_cq *io_cq,
 
 		ena_com_cq_inc_head(io_cq);
 		count++;
-		last = (READ_ONCE(cdesc->status) & ENA_ETH_IO_RX_CDESC_BASE_LAST_MASK) >>
-			ENA_ETH_IO_RX_CDESC_BASE_LAST_SHIFT;
+		last = (READ_ONCE(cdesc->status) &
+			ENA_ETH_IO_RX_CDESC_BASE_LAST_MASK) >>
+		       ENA_ETH_IO_RX_CDESC_BASE_LAST_SHIFT;
 	} while (!last);
 
 	if (last) {
@@ -275,7 +250,7 @@ static u16 ena_com_cdesc_rx_pkt_get(struct ena_com_io_cq *io_cq,
 		io_cq->cur_rx_pkt_cdesc_count = 0;
 		io_cq->cur_rx_pkt_cdesc_start_idx = head_masked;
 
-		pr_debug("ena q_id: %d packets were completed. first desc idx %u descs# %d\n",
+		pr_debug("ENA q_id: %d packets were completed. first desc idx %u descs# %d\n",
 			 io_cq->qid, *first_cdesc_idx, count);
 	} else {
 		io_cq->cur_rx_pkt_cdesc_count += count;
@@ -291,6 +266,9 @@ static int ena_com_create_meta(struct ena_com_io_sq *io_sq,
 	struct ena_eth_io_tx_meta_desc *meta_desc = NULL;
 
 	meta_desc = get_sq_desc(io_sq);
+	if (unlikely(!meta_desc))
+		return -EFAULT;
+
 	memset(meta_desc, 0x0, sizeof(struct ena_eth_io_tx_meta_desc));
 
 	meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_META_DESC_MASK;
@@ -298,7 +276,7 @@ static int ena_com_create_meta(struct ena_com_io_sq *io_sq,
 	meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_EXT_VALID_MASK;
 
 	/* bits 0-9 of the mss */
-	meta_desc->word2 |= (ena_meta->mss <<
+	meta_desc->word2 |= ((u32)ena_meta->mss <<
 		ENA_ETH_IO_TX_META_DESC_MSS_LO_SHIFT) &
 		ENA_ETH_IO_TX_META_DESC_MSS_LO_MASK;
 	/* bits 10-13 of the mss */
@@ -308,7 +286,7 @@ static int ena_com_create_meta(struct ena_com_io_sq *io_sq,
 
 	/* Extended meta desc */
 	meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_ETH_META_TYPE_MASK;
-	meta_desc->len_ctrl |= (io_sq->phase <<
+	meta_desc->len_ctrl |= ((u32)io_sq->phase <<
 		ENA_ETH_IO_TX_META_DESC_PHASE_SHIFT) &
 		ENA_ETH_IO_TX_META_DESC_PHASE_MASK;
 
@@ -321,7 +299,7 @@ static int ena_com_create_meta(struct ena_com_io_sq *io_sq,
 		ENA_ETH_IO_TX_META_DESC_L3_HDR_OFF_SHIFT) &
 		ENA_ETH_IO_TX_META_DESC_L3_HDR_OFF_MASK;
 
-	meta_desc->word2 |= (ena_meta->l4_hdr_len <<
+	meta_desc->word2 |= ((u32)ena_meta->l4_hdr_len <<
 		ENA_ETH_IO_TX_META_DESC_L4_HDR_LEN_IN_WORDS_SHIFT) &
 		ENA_ETH_IO_TX_META_DESC_L4_HDR_LEN_IN_WORDS_MASK;
 
@@ -358,7 +336,7 @@ static int ena_com_create_and_store_tx_meta_desc(struct ena_com_io_sq *io_sq,
 }
 
 static void ena_com_rx_set_flags(struct ena_com_rx_ctx *ena_rx_ctx,
-					struct ena_eth_io_rx_cdesc_base *cdesc)
+				 struct ena_eth_io_rx_cdesc_base *cdesc)
 {
 	ena_rx_ctx->l3_proto = cdesc->status &
 		ENA_ETH_IO_RX_CDESC_BASE_L3_PROTO_IDX_MASK;
@@ -379,7 +357,7 @@ static void ena_com_rx_set_flags(struct ena_com_rx_ctx *ena_rx_ctx,
 		(cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_MASK) >>
 		ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_SHIFT;
 
-	pr_debug("ena_rx_ctx->l3_proto %d ena_rx_ctx->l4_proto %d\nena_rx_ctx->l3_csum_err %d ena_rx_ctx->l4_csum_err %d\nhash frag %d frag: %d cdesc_status: %x\n",
+	pr_debug("l3_proto %d l4_proto %d l3_csum_err %d l4_csum_err %d hash %d frag %d cdesc_status %x\n",
 		 ena_rx_ctx->l3_proto, ena_rx_ctx->l4_proto,
 		 ena_rx_ctx->l3_csum_err, ena_rx_ctx->l4_csum_err,
 		 ena_rx_ctx->hash, ena_rx_ctx->frag, cdesc->status);
@@ -412,7 +390,7 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
 	}
 
 	if (unlikely(header_len > io_sq->tx_max_header_size)) {
-		pr_err("header size is too large %d max header: %d\n",
+		pr_err("Header size is too large %d max header: %d\n",
 		       header_len, io_sq->tx_max_header_size);
 		return -EINVAL;
 	}
@@ -427,7 +405,7 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
 
 	rc = ena_com_create_and_store_tx_meta_desc(io_sq, ena_tx_ctx, &have_meta);
 	if (unlikely(rc)) {
-		pr_err("failed to create and store tx meta desc\n");
+		pr_err("Failed to create and store tx meta desc\n");
 		return rc;
 	}
 
@@ -447,16 +425,16 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
 	if (!have_meta)
 		desc->len_ctrl |= ENA_ETH_IO_TX_DESC_FIRST_MASK;
 
-	desc->buff_addr_hi_hdr_sz |= (header_len <<
+	desc->buff_addr_hi_hdr_sz |= ((u32)header_len <<
 		ENA_ETH_IO_TX_DESC_HEADER_LENGTH_SHIFT) &
 		ENA_ETH_IO_TX_DESC_HEADER_LENGTH_MASK;
-	desc->len_ctrl |= (io_sq->phase << ENA_ETH_IO_TX_DESC_PHASE_SHIFT) &
+	desc->len_ctrl |= ((u32)io_sq->phase << ENA_ETH_IO_TX_DESC_PHASE_SHIFT) &
 		ENA_ETH_IO_TX_DESC_PHASE_MASK;
 
 	desc->len_ctrl |= ENA_ETH_IO_TX_DESC_COMP_REQ_MASK;
 
 	/* Bits 0-9 */
-	desc->meta_ctrl |= (ena_tx_ctx->req_id <<
+	desc->meta_ctrl |= ((u32)ena_tx_ctx->req_id <<
 		ENA_ETH_IO_TX_DESC_REQ_ID_LO_SHIFT) &
 		ENA_ETH_IO_TX_DESC_REQ_ID_LO_MASK;
 
@@ -502,7 +480,7 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
 
 			memset(desc, 0x0, sizeof(struct ena_eth_io_tx_desc));
 
-			desc->len_ctrl |= (io_sq->phase <<
+			desc->len_ctrl |= ((u32)io_sq->phase <<
 				ENA_ETH_IO_TX_DESC_PHASE_SHIFT) &
 				ENA_ETH_IO_TX_DESC_PHASE_MASK;
 		}
@@ -550,7 +528,7 @@ int ena_com_rx_pkt(struct ena_com_io_cq *io_cq,
 		return 0;
 	}
 
-	pr_debug("fetch rx packet: queue %d completed desc: %d\n", io_cq->qid,
+	pr_debug("Fetch rx packet: queue %d completed desc: %d\n", io_cq->qid,
 		 nb_hw_desc);
 
 	if (unlikely(nb_hw_desc > ena_rx_ctx->max_bufs)) {
@@ -606,9 +584,9 @@ int ena_com_add_single_rx_desc(struct ena_com_io_sq *io_sq,
 	desc->length = ena_buf->len;
 
 	desc->ctrl = ENA_ETH_IO_RX_DESC_FIRST_MASK |
-		ENA_ETH_IO_RX_DESC_LAST_MASK |
-		(io_sq->phase & ENA_ETH_IO_RX_DESC_PHASE_MASK) |
-		ENA_ETH_IO_RX_DESC_COMP_REQ_MASK;
+		     ENA_ETH_IO_RX_DESC_LAST_MASK |
+		     (io_sq->phase & ENA_ETH_IO_RX_DESC_PHASE_MASK) |
+		     ENA_ETH_IO_RX_DESC_COMP_REQ_MASK;
 
 	desc->req_id = req_id;
 

drivers/net/ethernet/amazon/ena/ena_eth_com.h

+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
 /*
- * Copyright 2015 Amazon.com, Inc. or its affiliates.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
+ * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
  */
 
 #ifndef ENA_ETH_COM_H_
@@ -167,7 +140,7 @@ static inline bool ena_com_is_doorbell_needed(struct ena_com_io_sq *io_sq,
 						   llq_info->descs_per_entry);
 	}
 
-	pr_debug("queue: %d num_descs: %d num_entries_needed: %d\n", io_sq->qid,
+	pr_debug("Queue: %d num_descs: %d num_entries_needed: %d\n", io_sq->qid,
 		 num_descs, num_entries_needed);
 
 	return num_entries_needed > io_sq->entries_in_tx_burst_left;
@@ -178,13 +151,13 @@ static inline int ena_com_write_sq_doorbell(struct ena_com_io_sq *io_sq)
 	u16 max_entries_in_tx_burst = io_sq->llq_info.max_entries_in_tx_burst;
 	u16 tail = io_sq->tail;
 
-	pr_debug("write submission queue doorbell for queue: %d tail: %d\n",
+	pr_debug("Write submission queue doorbell for queue: %d tail: %d\n",
 		 io_sq->qid, tail);
 
 	writel(tail, io_sq->db_addr);
 
 	if (is_llq_max_tx_burst_exists(io_sq)) {
-		pr_debug("reset available entries in tx burst for queue %d to %d\n",
+		pr_debug("Reset available entries in tx burst for queue %d to %d\n",
 			 io_sq->qid, max_entries_in_tx_burst);
 		io_sq->entries_in_tx_burst_left = max_entries_in_tx_burst;
 	}

drivers/net/ethernet/amazon/ena/ena_eth_io_defs.h

+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
 /*
- * Copyright 2015 - 2016 Amazon.com, Inc. or its affiliates.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
+ * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
  */
 #ifndef _ENA_ETH_IO_H_
 #define _ENA_ETH_IO_H_

drivers/net/ethernet/amazon/ena/ena_ethtool.c

+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
 /*
- * Copyright 2015 Amazon.com, Inc. or its affiliates.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
+ * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
  */
 
 #include <linux/pci.h>
@@ -966,7 +939,7 @@ static void ena_dump_stats_ex(struct ena_adapter *adapter, u8 *buf)
 				   GFP_ATOMIC);
 	if (!strings_buf) {
 		netif_err(adapter, drv, netdev,
-			  "failed to alloc strings_buf\n");
+			  "Failed to allocate strings_buf\n");
 		return;
 	}
 

drivers/net/ethernet/amazon/ena/ena_netdev.h

+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
 /*
- * Copyright 2015 Amazon.com, Inc. or its affiliates.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
+ * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
  */
 
 #ifndef ENA_H

drivers/net/ethernet/amazon/ena/ena_pci_id_tbl.h

+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
 /*
- * Copyright 2015 Amazon.com, Inc. or its affiliates.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
+ * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
  */
 
 #ifndef ENA_PCI_ID_TBL_H_

drivers/net/ethernet/amazon/ena/ena_regs_defs.h

+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
 /*
- * Copyright 2015 - 2016 Amazon.com, Inc. or its affiliates.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
+ * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
  */
 #ifndef _ENA_REGS_H_
 #define _ENA_REGS_H_