path: root/ena-fixes.patch

From 371f6ca7f5cbad70f6e5fafc12d5448d7b6f0750 Mon Sep 17 00:00:00 2001
From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Thu, 11 Oct 2018 11:26:16 +0300
Subject: [PATCH 02/16] net: ena: minor performance improvement

Reduce fastpath overhead by making ena_com_tx_comp_req_id_get() inline.
Also move it to ena_eth_com.h file with its dependency function
ena_com_cq_inc_head().

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amazon/ena/ena_eth_com.c | 43 -----------------
 drivers/net/ethernet/amazon/ena/ena_eth_com.h | 46 ++++++++++++++++++-
 2 files changed, 44 insertions(+), 45 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_eth_com.c b/drivers/net/ethernet/amazon/ena/ena_eth_com.c
index 2b3ff0c20155..9c0511e9f9a2 100644
--- a/drivers/net/ethernet/amazon/ena/ena_eth_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_eth_com.c
@@ -59,15 +59,6 @@ static inline struct ena_eth_io_rx_cdesc_base *ena_com_get_next_rx_cdesc(
 	return cdesc;
 }
 
-static inline void ena_com_cq_inc_head(struct ena_com_io_cq *io_cq)
-{
-	io_cq->head++;
-
-	/* Switch phase bit in case of wrap around */
-	if (unlikely((io_cq->head & (io_cq->q_depth - 1)) == 0))
-		io_cq->phase ^= 1;
-}
-
 static inline void *get_sq_desc(struct ena_com_io_sq *io_sq)
 {
 	u16 tail_masked;
@@ -477,40 +468,6 @@ int ena_com_add_single_rx_desc(struct ena_com_io_sq *io_sq,
 	return 0;
 }
 
-int ena_com_tx_comp_req_id_get(struct ena_com_io_cq *io_cq, u16 *req_id)
-{
-	u8 expected_phase, cdesc_phase;
-	struct ena_eth_io_tx_cdesc *cdesc;
-	u16 masked_head;
-
-	masked_head = io_cq->head & (io_cq->q_depth - 1);
-	expected_phase = io_cq->phase;
-
-	cdesc = (struct ena_eth_io_tx_cdesc *)
-		((uintptr_t)io_cq->cdesc_addr.virt_addr +
-		(masked_head * io_cq->cdesc_entry_size_in_bytes));
-
-	/* When the current completion descriptor phase isn't the same as the
-	 * expected, it mean that the device still didn't update
-	 * this completion.
-	 */
-	cdesc_phase = READ_ONCE(cdesc->flags) & ENA_ETH_IO_TX_CDESC_PHASE_MASK;
-	if (cdesc_phase != expected_phase)
-		return -EAGAIN;
-
-	dma_rmb();
-	if (unlikely(cdesc->req_id >= io_cq->q_depth)) {
-		pr_err("Invalid req id %d\n", cdesc->req_id);
-		return -EINVAL;
-	}
-
-	ena_com_cq_inc_head(io_cq);
-
-	*req_id = READ_ONCE(cdesc->req_id);
-
-	return 0;
-}
-
 bool ena_com_cq_empty(struct ena_com_io_cq *io_cq)
 {
 	struct ena_eth_io_rx_cdesc_base *cdesc;
diff --git a/drivers/net/ethernet/amazon/ena/ena_eth_com.h b/drivers/net/ethernet/amazon/ena/ena_eth_com.h
index 2f7657227cfe..4930324e9d8d 100644
--- a/drivers/net/ethernet/amazon/ena/ena_eth_com.h
+++ b/drivers/net/ethernet/amazon/ena/ena_eth_com.h
@@ -86,8 +86,6 @@ int ena_com_add_single_rx_desc(struct ena_com_io_sq *io_sq,
 			       struct ena_com_buf *ena_buf,
 			       u16 req_id);
 
-int ena_com_tx_comp_req_id_get(struct ena_com_io_cq *io_cq, u16 *req_id);
-
 bool ena_com_cq_empty(struct ena_com_io_cq *io_cq);
 
 static inline void ena_com_unmask_intr(struct ena_com_io_cq *io_cq,
@@ -159,4 +157,48 @@ static inline void ena_com_comp_ack(struct ena_com_io_sq *io_sq, u16 elem)
 	io_sq->next_to_comp += elem;
 }
 
+static inline void ena_com_cq_inc_head(struct ena_com_io_cq *io_cq)
+{
+	io_cq->head++;
+
+	/* Switch phase bit in case of wrap around */
+	if (unlikely((io_cq->head & (io_cq->q_depth - 1)) == 0))
+		io_cq->phase ^= 1;
+}
+
+static inline int ena_com_tx_comp_req_id_get(struct ena_com_io_cq *io_cq,
+					     u16 *req_id)
+{
+	u8 expected_phase, cdesc_phase;
+	struct ena_eth_io_tx_cdesc *cdesc;
+	u16 masked_head;
+
+	masked_head = io_cq->head & (io_cq->q_depth - 1);
+	expected_phase = io_cq->phase;
+
+	cdesc = (struct ena_eth_io_tx_cdesc *)
+		((uintptr_t)io_cq->cdesc_addr.virt_addr +
+		(masked_head * io_cq->cdesc_entry_size_in_bytes));
+
+	/* When the current completion descriptor phase isn't the same as the
+	 * expected, it mean that the device still didn't update
+	 * this completion.
+	 */
+	cdesc_phase = READ_ONCE(cdesc->flags) & ENA_ETH_IO_TX_CDESC_PHASE_MASK;
+	if (cdesc_phase != expected_phase)
+		return -EAGAIN;
+
+	dma_rmb();
+
+	*req_id = READ_ONCE(cdesc->req_id);
+	if (unlikely(*req_id >= io_cq->q_depth)) {
+		pr_err("Invalid req id %d\n", cdesc->req_id);
+		return -EINVAL;
+	}
+
+	ena_com_cq_inc_head(io_cq);
+
+	return 0;
+}
+
 #endif /* ENA_ETH_COM_H_ */
-- 
2.19.1

From df44a6755f48dfc5c94d878e80807931460c3846 Mon Sep 17 00:00:00 2001
From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Thu, 11 Oct 2018 11:26:17 +0300
Subject: [PATCH 03/16] net: ena: complete host info to match latest ENA spec

Add new fields and definitions to host info and fill them
according to the latest ENA spec version.

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 .../net/ethernet/amazon/ena/ena_admin_defs.h  | 31 ++++++++++++++++++-
 drivers/net/ethernet/amazon/ena/ena_com.c     | 12 +++----
 .../net/ethernet/amazon/ena/ena_common_defs.h |  4 +--
 drivers/net/ethernet/amazon/ena/ena_netdev.c  | 10 ++++--
 4 files changed, 43 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_admin_defs.h b/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
index 4532e574ebcd..d735164efea3 100644
--- a/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
+++ b/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
@@ -63,6 +63,8 @@ enum ena_admin_aq_completion_status {
 	ENA_ADMIN_ILLEGAL_PARAMETER		= 5,
 
 	ENA_ADMIN_UNKNOWN_ERROR			= 6,
+
+	ENA_ADMIN_RESOURCE_BUSY                 = 7,
 };
 
 enum ena_admin_aq_feature_id {
@@ -702,6 +704,10 @@ enum ena_admin_os_type {
 	ENA_ADMIN_OS_FREEBSD	= 4,
 
 	ENA_ADMIN_OS_IPXE	= 5,
+
+	ENA_ADMIN_OS_ESXI       = 6,
+
+	ENA_ADMIN_OS_GROUPS_NUM = 6,
 };
 
 struct ena_admin_host_info {
@@ -723,11 +729,27 @@ struct ena_admin_host_info {
 	/* 7:0 : major
 	 * 15:8 : minor
 	 * 23:16 : sub_minor
+	 * 31:24 : module_type
 	 */
 	u32 driver_version;
 
 	/* features bitmap */
-	u32 supported_network_features[4];
+	u32 supported_network_features[2];
+
+	/* ENA spec version of driver */
+	u16 ena_spec_version;
+
+	/* ENA device's Bus, Device and Function
+	 * 2:0 : function
+	 * 7:3 : device
+	 * 15:8 : bus
+	 */
+	u16 bdf;
+
+	/* Number of CPUs */
+	u16 num_cpus;
+
+	u16 reserved;
 };
 
 struct ena_admin_rss_ind_table_entry {
@@ -1008,6 +1030,13 @@ struct ena_admin_ena_mmio_req_read_less_resp {
 #define ENA_ADMIN_HOST_INFO_MINOR_MASK GENMASK(15, 8)
 #define ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT 16
 #define ENA_ADMIN_HOST_INFO_SUB_MINOR_MASK GENMASK(23, 16)
+#define ENA_ADMIN_HOST_INFO_MODULE_TYPE_SHIFT 24
+#define ENA_ADMIN_HOST_INFO_MODULE_TYPE_MASK GENMASK(31, 24)
+#define ENA_ADMIN_HOST_INFO_FUNCTION_MASK GENMASK(2, 0)
+#define ENA_ADMIN_HOST_INFO_DEVICE_SHIFT 3
+#define ENA_ADMIN_HOST_INFO_DEVICE_MASK GENMASK(7, 3)
+#define ENA_ADMIN_HOST_INFO_BUS_SHIFT 8
+#define ENA_ADMIN_HOST_INFO_BUS_MASK GENMASK(15, 8)
 
 /* aenq_common_desc */
 #define ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK BIT(0)
diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c
index 7635c38e77dd..b6e6a4721931 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -41,9 +41,6 @@
 #define ENA_ASYNC_QUEUE_DEPTH 16
 #define ENA_ADMIN_QUEUE_DEPTH 32
 
-#define MIN_ENA_VER (((ENA_COMMON_SPEC_VERSION_MAJOR) << \
-		ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) \
-		| (ENA_COMMON_SPEC_VERSION_MINOR))
 
 #define ENA_CTRL_MAJOR		0
 #define ENA_CTRL_MINOR		0
@@ -1400,11 +1397,6 @@ int ena_com_validate_version(struct ena_com_dev *ena_dev)
 			ENA_REGS_VERSION_MAJOR_VERSION_SHIFT,
 		ver & ENA_REGS_VERSION_MINOR_VERSION_MASK);
 
-	if (ver < MIN_ENA_VER) {
-		pr_err("ENA version is lower than the minimal version the driver supports\n");
-		return -1;
-	}
-
 	pr_info("ena controller version: %d.%d.%d implementation version %d\n",
 		(ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) >>
 			ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT,
@@ -2441,6 +2433,10 @@ int ena_com_allocate_host_info(struct ena_com_dev *ena_dev)
 	if (unlikely(!host_attr->host_info))
 		return -ENOMEM;
 
+	host_attr->host_info->ena_spec_version =
+		((ENA_COMMON_SPEC_VERSION_MAJOR << ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) |
+		(ENA_COMMON_SPEC_VERSION_MINOR));
+
 	return 0;
 }
 
diff --git a/drivers/net/ethernet/amazon/ena/ena_common_defs.h b/drivers/net/ethernet/amazon/ena/ena_common_defs.h
index bb8d73676eab..23beb7e7ed7b 100644
--- a/drivers/net/ethernet/amazon/ena/ena_common_defs.h
+++ b/drivers/net/ethernet/amazon/ena/ena_common_defs.h
@@ -32,8 +32,8 @@
 #ifndef _ENA_COMMON_H_
 #define _ENA_COMMON_H_
 
-#define ENA_COMMON_SPEC_VERSION_MAJOR	0 /*  */
-#define ENA_COMMON_SPEC_VERSION_MINOR	10 /*  */
+#define ENA_COMMON_SPEC_VERSION_MAJOR        2
+#define ENA_COMMON_SPEC_VERSION_MINOR        0
 
 /* ENA operates with 48-bit memory addresses. ena_mem_addr_t */
 struct ena_common_mem_addr {
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 69a49784b204..0c9c0d3ce856 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -2206,7 +2206,8 @@ static u16 ena_select_queue(struct net_device *dev, struct sk_buff *skb,
 	return qid;
 }
 
-static void ena_config_host_info(struct ena_com_dev *ena_dev)
+static void ena_config_host_info(struct ena_com_dev *ena_dev,
+				 struct pci_dev *pdev)
 {
 	struct ena_admin_host_info *host_info;
 	int rc;
@@ -2220,6 +2221,7 @@ static void ena_config_host_info(struct ena_com_dev *ena_dev)
 
 	host_info = ena_dev->host_attr.host_info;
 
+	host_info->bdf = (pdev->bus->number << 8) | pdev->devfn;
 	host_info->os_type = ENA_ADMIN_OS_LINUX;
 	host_info->kernel_ver = LINUX_VERSION_CODE;
 	strncpy(host_info->kernel_ver_str, utsname()->version,
@@ -2230,7 +2232,9 @@ static void ena_config_host_info(struct ena_com_dev *ena_dev)
 	host_info->driver_version =
 		(DRV_MODULE_VER_MAJOR) |
 		(DRV_MODULE_VER_MINOR << ENA_ADMIN_HOST_INFO_MINOR_SHIFT) |
-		(DRV_MODULE_VER_SUBMINOR << ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT);
+		(DRV_MODULE_VER_SUBMINOR << ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT) |
+		("K"[0] << ENA_ADMIN_HOST_INFO_MODULE_TYPE_SHIFT);
+	host_info->num_cpus = num_online_cpus();
 
 	rc = ena_com_set_host_attributes(ena_dev);
 	if (rc) {
@@ -2454,7 +2458,7 @@ static int ena_device_init(struct ena_com_dev *ena_dev, struct pci_dev *pdev,
 	 */
 	ena_com_set_admin_polling_mode(ena_dev, true);
 
-	ena_config_host_info(ena_dev);
+	ena_config_host_info(ena_dev, pdev);
 
 	/* Get Device Attributes*/
 	rc = ena_com_get_dev_attr_feat(ena_dev, get_feat_ctx);
-- 
2.19.1

From 0a66e6d1fe86cb3d49fcd76057b4f7a50e0fe49a Mon Sep 17 00:00:00 2001
From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Thu, 11 Oct 2018 11:26:18 +0300
Subject: [PATCH 04/16] net: ena: introduce Low Latency Queues data structures
 according to ENA spec

Low Latency Queues(LLQ) allow usage of device's memory for descriptors
and headers. Such queues decrease processing time since data is already
located on the device when driver rings the doorbell.

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 .../net/ethernet/amazon/ena/ena_admin_defs.h  | 90 ++++++++++++++++++-
 drivers/net/ethernet/amazon/ena/ena_com.h     | 38 ++++++++
 drivers/net/ethernet/amazon/ena/ena_netdev.c  |  6 +-
 3 files changed, 128 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_admin_defs.h b/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
index d735164efea3..b439ec1b3edb 100644
--- a/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
+++ b/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
@@ -74,6 +74,8 @@ enum ena_admin_aq_feature_id {
 
 	ENA_ADMIN_HW_HINTS			= 3,
 
+	ENA_ADMIN_LLQ                           = 4,
+
 	ENA_ADMIN_RSS_HASH_FUNCTION		= 10,
 
 	ENA_ADMIN_STATELESS_OFFLOAD_CONFIG	= 11,
@@ -485,8 +487,85 @@ struct ena_admin_device_attr_feature_desc {
 	u32 max_mtu;
 };
 
+enum ena_admin_llq_header_location {
+	/* header is in descriptor list */
+	ENA_ADMIN_INLINE_HEADER                     = 1,
+	/* header in a separate ring, implies 16B descriptor list entry */
+	ENA_ADMIN_HEADER_RING                       = 2,
+};
+
+enum ena_admin_llq_ring_entry_size {
+	ENA_ADMIN_LIST_ENTRY_SIZE_128B              = 1,
+	ENA_ADMIN_LIST_ENTRY_SIZE_192B              = 2,
+	ENA_ADMIN_LIST_ENTRY_SIZE_256B              = 4,
+};
+
+enum ena_admin_llq_num_descs_before_header {
+	ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_0     = 0,
+	ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1     = 1,
+	ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2     = 2,
+	ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4     = 4,
+	ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8     = 8,
+};
+
+/* packet descriptor list entry always starts with one or more descriptors,
+ * followed by a header. The rest of the descriptors are located in the
+ * beginning of the subsequent entry. Stride refers to how the rest of the
+ * descriptors are placed. This field is relevant only for inline header
+ * mode
+ */
+enum ena_admin_llq_stride_ctrl {
+	ENA_ADMIN_SINGLE_DESC_PER_ENTRY             = 1,
+	ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY          = 2,
+};
+
+struct ena_admin_feature_llq_desc {
+	u32 max_llq_num;
+
+	u32 max_llq_depth;
+
+	/*  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
+	 */
+	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
+	 */
+	u16 desc_num_before_header_supported;
+
+	/* the desire field the driver selected to use */
+	u16 desc_num_before_header_enabled;
+
+	/* valid only if inline was chosen. bitfield of enum
+	 *    ena_admin_llq_stride_ctrl
+	 */
+	u16 descriptors_stride_ctrl_supported;
+
+	/* the stride control the driver selected to use */
+	u16 descriptors_stride_ctrl_enabled;
+};
+
 struct ena_admin_queue_feature_desc {
-	/* including LLQs */
 	u32 max_sq_num;
 
 	u32 max_sq_depth;
@@ -495,9 +574,9 @@ struct ena_admin_queue_feature_desc {
 
 	u32 max_cq_depth;
 
-	u32 max_llq_num;
+	u32 max_legacy_llq_num;
 
-	u32 max_llq_depth;
+	u32 max_legacy_llq_depth;
 
 	u32 max_header_size;
 
@@ -822,6 +901,8 @@ struct ena_admin_get_feat_resp {
 
 		struct ena_admin_device_attr_feature_desc dev_attr;
 
+		struct ena_admin_feature_llq_desc llq;
+
 		struct ena_admin_queue_feature_desc max_queue;
 
 		struct ena_admin_feature_aenq_desc aenq;
@@ -869,6 +950,9 @@ struct ena_admin_set_feat_cmd {
 
 		/* rss indirection table */
 		struct ena_admin_feature_rss_ind_table ind_table;
+
+		/* LLQ configuration */
+		struct ena_admin_feature_llq_desc llq;
 	} u;
 };
 
diff --git a/drivers/net/ethernet/amazon/ena/ena_com.h b/drivers/net/ethernet/amazon/ena/ena_com.h
index 7b784f8a06a6..50e6c8f6f138 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.h
+++ b/drivers/net/ethernet/amazon/ena/ena_com.h
@@ -108,6 +108,14 @@ enum ena_intr_moder_level {
 	ENA_INTR_MAX_NUM_OF_LEVELS,
 };
 
+struct ena_llq_configurations {
+	enum ena_admin_llq_header_location llq_header_location;
+	enum ena_admin_llq_ring_entry_size llq_ring_entry_size;
+	enum ena_admin_llq_stride_ctrl  llq_stride_ctrl;
+	enum ena_admin_llq_num_descs_before_header llq_num_decs_before_header;
+	u16 llq_ring_entry_size_value;
+};
+
 struct ena_intr_moder_entry {
 	unsigned int intr_moder_interval;
 	unsigned int pkts_per_interval;
@@ -142,6 +150,15 @@ struct ena_com_tx_meta {
 	u16 l4_hdr_len; /* In words */
 };
 
+struct ena_com_llq_info {
+	u16 header_location_ctrl;
+	u16 desc_stride_ctrl;
+	u16 desc_list_entry_size_ctrl;
+	u16 desc_list_entry_size;
+	u16 descs_num_before_header;
+	u16 descs_per_entry;
+};
+
 struct ena_com_io_cq {
 	struct ena_com_io_desc_addr cdesc_addr;
 
@@ -179,6 +196,20 @@ struct ena_com_io_cq {
 
 } ____cacheline_aligned;
 
+struct ena_com_io_bounce_buffer_control {
+	u8 *base_buffer;
+	u16 next_to_use;
+	u16 buffer_size;
+	u16 buffers_num;  /* Must be a power of 2 */
+};
+
+/* This struct is to keep tracking the current location of the next llq entry */
+struct ena_com_llq_pkt_ctrl {
+	u8 *curr_bounce_buf;
+	u16 idx;
+	u16 descs_left_in_line;
+};
+
 struct ena_com_io_sq {
 	struct ena_com_io_desc_addr desc_addr;
 
@@ -190,6 +221,9 @@ struct ena_com_io_sq {
 
 	u32 msix_vector;
 	struct ena_com_tx_meta cached_tx_meta;
+	struct ena_com_llq_info llq_info;
+	struct ena_com_llq_pkt_ctrl llq_buf_ctrl;
+	struct ena_com_io_bounce_buffer_control bounce_buf_ctrl;
 
 	u16 q_depth;
 	u16 qid;
@@ -197,6 +231,7 @@ struct ena_com_io_sq {
 	u16 idx;
 	u16 tail;
 	u16 next_to_comp;
+	u16 llq_last_copy_tail;
 	u32 tx_max_header_size;
 	u8 phase;
 	u8 desc_entry_size;
@@ -334,6 +369,8 @@ struct ena_com_dev {
 	u16 intr_delay_resolution;
 	u32 intr_moder_tx_interval;
 	struct ena_intr_moder_entry *intr_moder_tbl;
+
+	struct ena_com_llq_info llq_info;
 };
 
 struct ena_com_dev_get_features_ctx {
@@ -342,6 +379,7 @@ struct ena_com_dev_get_features_ctx {
 	struct ena_admin_feature_aenq_desc aenq;
 	struct ena_admin_feature_offload_desc offload;
 	struct ena_admin_ena_hw_hints hw_hints;
+	struct ena_admin_feature_llq_desc llq;
 };
 
 struct ena_com_create_io_ctx {
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 0c9c0d3ce856..789556960b8e 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -2959,7 +2959,7 @@ static int ena_calc_io_queue_num(struct pci_dev *pdev,
 
 	/* In case of LLQ use the llq number in the get feature cmd */
 	if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
-		io_sq_num = get_feat_ctx->max_queues.max_llq_num;
+		io_sq_num = get_feat_ctx->max_queues.max_legacy_llq_num;
 
 		if (io_sq_num == 0) {
 			dev_err(&pdev->dev,
@@ -2995,7 +2995,7 @@ static void ena_set_push_mode(struct pci_dev *pdev, struct ena_com_dev *ena_dev,
 	has_mem_bar = pci_select_bars(pdev, IORESOURCE_MEM) & BIT(ENA_MEM_BAR);
 
 	/* Enable push mode if device supports LLQ */
-	if (has_mem_bar && (get_feat_ctx->max_queues.max_llq_num > 0))
+	if (has_mem_bar && get_feat_ctx->max_queues.max_legacy_llq_num > 0)
 		ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
 	else
 		ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
@@ -3131,7 +3131,7 @@ static int ena_calc_queue_size(struct pci_dev *pdev,
 
 	if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
 		queue_size = min_t(u32, queue_size,
-				   get_feat_ctx->max_queues.max_llq_depth);
+				   get_feat_ctx->max_queues.max_legacy_llq_depth);
 
 	queue_size = rounddown_pow_of_two(queue_size);
 
-- 
2.19.1

From 8e9ebea20ab8db4f3a993e815e0b6b84ce98bbfb Mon Sep 17 00:00:00 2001
From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Thu, 11 Oct 2018 11:26:19 +0300
Subject: [PATCH 05/16] net: ena: add functions for handling Low Latency Queues
 in ena_com

This patch introduces APIs for detection, initialization, configuration
and actual usage of low latency queues(LLQ). It extends transmit API with
creation of LLQ descriptors in device memory (which include host buffers
descriptors as well as packet header)

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amazon/ena/ena_com.c     | 249 +++++++++++++++++-
 drivers/net/ethernet/amazon/ena/ena_com.h     |  28 ++
 drivers/net/ethernet/amazon/ena/ena_eth_com.c | 231 ++++++++++++----
 drivers/net/ethernet/amazon/ena/ena_eth_com.h |  25 +-
 drivers/net/ethernet/amazon/ena/ena_netdev.c  |  21 +-
 5 files changed, 474 insertions(+), 80 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c
index b6e6a4721931..5220c7578d6b 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -58,6 +58,8 @@
 
 #define ENA_MMIO_READ_TIMEOUT 0xFFFFFFFF
 
+#define ENA_COM_BOUNCE_BUFFER_CNTRL_CNT	4
+
 #define ENA_REGS_ADMIN_INTR_MASK 1
 
 #define ENA_POLL_MS	5
@@ -352,21 +354,48 @@ static int ena_com_init_io_sq(struct ena_com_dev *ena_dev,
 						    &io_sq->desc_addr.phys_addr,
 						    GFP_KERNEL);
 		}
-	} else {
+
+		if (!io_sq->desc_addr.virt_addr) {
+			pr_err("memory allocation failed");
+			return -ENOMEM;
+		}
+	}
+
+	if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
+		/* Allocate bounce buffers */
+		io_sq->bounce_buf_ctrl.buffer_size =
+			ena_dev->llq_info.desc_list_entry_size;
+		io_sq->bounce_buf_ctrl.buffers_num =
+			ENA_COM_BOUNCE_BUFFER_CNTRL_CNT;
+		io_sq->bounce_buf_ctrl.next_to_use = 0;
+
+		size = io_sq->bounce_buf_ctrl.buffer_size *
+			 io_sq->bounce_buf_ctrl.buffers_num;
+
 		dev_node = dev_to_node(ena_dev->dmadev);
 		set_dev_node(ena_dev->dmadev, ctx->numa_node);
-		io_sq->desc_addr.virt_addr =
+		io_sq->bounce_buf_ctrl.base_buffer =
 			devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
 		set_dev_node(ena_dev->dmadev, dev_node);
-		if (!io_sq->desc_addr.virt_addr) {
-			io_sq->desc_addr.virt_addr =
+		if (!io_sq->bounce_buf_ctrl.base_buffer)
+			io_sq->bounce_buf_ctrl.base_buffer =
 				devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
+
+		if (!io_sq->bounce_buf_ctrl.base_buffer) {
+			pr_err("bounce buffer memory allocation failed");
+			return -ENOMEM;
 		}
-	}
 
-	if (!io_sq->desc_addr.virt_addr) {
-		pr_err("memory allocation failed");
-		return -ENOMEM;
+		memcpy(&io_sq->llq_info, &ena_dev->llq_info,
+		       sizeof(io_sq->llq_info));
+
+		/* Initiate the first bounce buffer */
+		io_sq->llq_buf_ctrl.curr_bounce_buf =
+			ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl);
+		memset(io_sq->llq_buf_ctrl.curr_bounce_buf,
+		       0x0, io_sq->llq_info.desc_list_entry_size);
+		io_sq->llq_buf_ctrl.descs_left_in_line =
+			io_sq->llq_info.descs_num_before_header;
 	}
 
 	io_sq->tail = 0;
@@ -554,6 +583,156 @@ static int ena_com_wait_and_process_admin_cq_polling(struct ena_comp_ctx *comp_c
 	return ret;
 }
 
+/**
+ * Set the LLQ configurations of the firmware
+ *
+ * The driver provides only the enabled feature values to the device,
+ * which in turn, checks if they are supported.
+ */
+static int ena_com_set_llq(struct ena_com_dev *ena_dev)
+{
+	struct ena_com_admin_queue *admin_queue;
+	struct ena_admin_set_feat_cmd cmd;
+	struct ena_admin_set_feat_resp resp;
+	struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
+	int ret;
+
+	memset(&cmd, 0x0, sizeof(cmd));
+	admin_queue = &ena_dev->admin_queue;
+
+	cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
+	cmd.feat_common.feature_id = ENA_ADMIN_LLQ;
+
+	cmd.u.llq.header_location_ctrl_enabled = llq_info->header_location_ctrl;
+	cmd.u.llq.entry_size_ctrl_enabled = llq_info->desc_list_entry_size_ctrl;
+	cmd.u.llq.desc_num_before_header_enabled = llq_info->descs_num_before_header;
+	cmd.u.llq.descriptors_stride_ctrl_enabled = llq_info->desc_stride_ctrl;
+
+	ret = ena_com_execute_admin_command(admin_queue,
+					    (struct ena_admin_aq_entry *)&cmd,
+					    sizeof(cmd),
+					    (struct ena_admin_acq_entry *)&resp,
+					    sizeof(resp));
+
+	if (unlikely(ret))
+		pr_err("Failed to set LLQ configurations: %d\n", ret);
+
+	return ret;
+}
+
+static int ena_com_config_llq_info(struct ena_com_dev *ena_dev,
+				   struct ena_admin_feature_llq_desc *llq_features,
+				   struct ena_llq_configurations *llq_default_cfg)
+{
+	struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
+	u16 supported_feat;
+	int rc;
+
+	memset(llq_info, 0, sizeof(*llq_info));
+
+	supported_feat = llq_features->header_location_ctrl_supported;
+
+	if (likely(supported_feat & llq_default_cfg->llq_header_location)) {
+		llq_info->header_location_ctrl =
+			llq_default_cfg->llq_header_location;
+	} else {
+		pr_err("Invalid header location control, supported: 0x%x\n",
+		       supported_feat);
+		return -EINVAL;
+	}
+
+	if (likely(llq_info->header_location_ctrl == ENA_ADMIN_INLINE_HEADER)) {
+		supported_feat = llq_features->descriptors_stride_ctrl_supported;
+		if (likely(supported_feat & llq_default_cfg->llq_stride_ctrl)) {
+			llq_info->desc_stride_ctrl = llq_default_cfg->llq_stride_ctrl;
+		} else	{
+			if (supported_feat & ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY) {
+				llq_info->desc_stride_ctrl = ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY;
+			} else if (supported_feat & ENA_ADMIN_SINGLE_DESC_PER_ENTRY) {
+				llq_info->desc_stride_ctrl = ENA_ADMIN_SINGLE_DESC_PER_ENTRY;
+			} else {
+				pr_err("Invalid desc_stride_ctrl, supported: 0x%x\n",
+				       supported_feat);
+				return -EINVAL;
+			}
+
+			pr_err("Default llq stride ctrl is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
+			       llq_default_cfg->llq_stride_ctrl, supported_feat,
+			       llq_info->desc_stride_ctrl);
+		}
+	} else {
+		llq_info->desc_stride_ctrl = 0;
+	}
+
+	supported_feat = llq_features->entry_size_ctrl_supported;
+	if (likely(supported_feat & llq_default_cfg->llq_ring_entry_size)) {
+		llq_info->desc_list_entry_size_ctrl = llq_default_cfg->llq_ring_entry_size;
+		llq_info->desc_list_entry_size = llq_default_cfg->llq_ring_entry_size_value;
+	} else {
+		if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_128B) {
+			llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_128B;
+			llq_info->desc_list_entry_size = 128;
+		} else if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_192B) {
+			llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_192B;
+			llq_info->desc_list_entry_size = 192;
+		} else if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_256B) {
+			llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_256B;
+			llq_info->desc_list_entry_size = 256;
+		} else {
+			pr_err("Invalid entry_size_ctrl, supported: 0x%x\n",
+			       supported_feat);
+			return -EINVAL;
+		}
+
+		pr_err("Default llq ring entry size is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
+		       llq_default_cfg->llq_ring_entry_size, supported_feat,
+		       llq_info->desc_list_entry_size);
+	}
+	if (unlikely(llq_info->desc_list_entry_size & 0x7)) {
+		/* The desc list entry size should be whole multiply of 8
+		 * This requirement comes from __iowrite64_copy()
+		 */
+		pr_err("illegal entry size %d\n",
+		       llq_info->desc_list_entry_size);
+		return -EINVAL;
+	}
+
+	if (llq_info->desc_stride_ctrl == ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY)
+		llq_info->descs_per_entry = llq_info->desc_list_entry_size /
+			sizeof(struct ena_eth_io_tx_desc);
+	else
+		llq_info->descs_per_entry = 1;
+
+	supported_feat = llq_features->desc_num_before_header_supported;
+	if (likely(supported_feat & llq_default_cfg->llq_num_decs_before_header)) {
+		llq_info->descs_num_before_header = llq_default_cfg->llq_num_decs_before_header;
+	} else {
+		if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2) {
+			llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2;
+		} else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1) {
+			llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1;
+		} else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4) {
+			llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4;
+		} else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8) {
+			llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8;
+		} else {
+			pr_err("Invalid descs_num_before_header, supported: 0x%x\n",
+			       supported_feat);
+			return -EINVAL;
+		}
+
+		pr_err("Default llq num descs before header is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
+		       llq_default_cfg->llq_num_decs_before_header,
+		       supported_feat, llq_info->descs_num_before_header);
+	}
+
+	rc = ena_com_set_llq(ena_dev);
+	if (rc)
+		pr_err("Cannot set LLQ configuration: %d\n", rc);
+
+	return 0;
+}
+
 static int ena_com_wait_and_process_admin_cq_interrupts(struct ena_comp_ctx *comp_ctx,
 							struct ena_com_admin_queue *admin_queue)
 {
@@ -725,15 +904,17 @@ static void ena_com_io_queue_free(struct ena_com_dev *ena_dev,
 	if (io_sq->desc_addr.virt_addr) {
 		size = io_sq->desc_entry_size * io_sq->q_depth;
 
-		if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
-			dma_free_coherent(ena_dev->dmadev, size,
-					  io_sq->desc_addr.virt_addr,
-					  io_sq->desc_addr.phys_addr);
-		else
-			devm_kfree(ena_dev->dmadev, io_sq->desc_addr.virt_addr);
+		dma_free_coherent(ena_dev->dmadev, size,
+				  io_sq->desc_addr.virt_addr,
+				  io_sq->desc_addr.phys_addr);
 
 		io_sq->desc_addr.virt_addr = NULL;
 	}
+
+	if (io_sq->bounce_buf_ctrl.base_buffer) {
+		devm_kfree(ena_dev->dmadev, io_sq->bounce_buf_ctrl.base_buffer);
+		io_sq->bounce_buf_ctrl.base_buffer = NULL;
+	}
 }
 
 static int wait_for_reset_state(struct ena_com_dev *ena_dev, u32 timeout,
@@ -1740,6 +1921,15 @@ int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
 	else
 		return rc;
 
+	rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_LLQ);
+	if (!rc)
+		memcpy(&get_feat_ctx->llq, &get_resp.u.llq,
+		       sizeof(get_resp.u.llq));
+	else if (rc == -EOPNOTSUPP)
+		memset(&get_feat_ctx->llq, 0x0, sizeof(get_feat_ctx->llq));
+	else
+		return rc;
+
 	return 0;
 }
 
@@ -2708,3 +2898,34 @@ void ena_com_get_intr_moderation_entry(struct ena_com_dev *ena_dev,
 	intr_moder_tbl[level].pkts_per_interval;
 	entry->bytes_per_interval = intr_moder_tbl[level].bytes_per_interval;
 }
+
+int ena_com_config_dev_mode(struct ena_com_dev *ena_dev,
+			    struct ena_admin_feature_llq_desc *llq_features,
+			    struct ena_llq_configurations *llq_default_cfg)
+{
+	int rc;
+	int size;
+
+	if (!llq_features->max_llq_num) {
+		ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
+		return 0;
+	}
+
+	rc = ena_com_config_llq_info(ena_dev, llq_features, llq_default_cfg);
+	if (rc)
+		return rc;
+
+	/* Validate the descriptor is not too big */
+	size = ena_dev->tx_max_header_size;
+	size += ena_dev->llq_info.descs_num_before_header *
+		sizeof(struct ena_eth_io_tx_desc);
+
+	if (unlikely(ena_dev->llq_info.desc_list_entry_size < size)) {
+		pr_err("the size of the LLQ entry is smaller than needed\n");
+		return -EINVAL;
+	}
+
+	ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
+
+	return 0;
+}
diff --git a/drivers/net/ethernet/amazon/ena/ena_com.h b/drivers/net/ethernet/amazon/ena/ena_com.h
index 50e6c8f6f138..25af8d025919 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.h
+++ b/drivers/net/ethernet/amazon/ena/ena_com.h
@@ -37,6 +37,7 @@
 #include <linux/delay.h>
 #include <linux/dma-mapping.h>
 #include <linux/gfp.h>
+#include <linux/io.h>
 #include <linux/sched.h>
 #include <linux/sizes.h>
 #include <linux/spinlock.h>
@@ -973,6 +974,16 @@ void ena_com_get_intr_moderation_entry(struct ena_com_dev *ena_dev,
 				       enum ena_intr_moder_level level,
 				       struct ena_intr_moder_entry *entry);
 
+/* ena_com_config_dev_mode - Configure the placement policy of the device.
+ * @ena_dev: ENA communication layer struct
+ * @llq_features: LLQ feature descriptor, retrieve via
+ *                ena_com_get_dev_attr_feat.
+ * @ena_llq_config: The default driver LLQ parameters configurations
+ */
+int ena_com_config_dev_mode(struct ena_com_dev *ena_dev,
+			    struct ena_admin_feature_llq_desc *llq_features,
+			    struct ena_llq_configurations *llq_default_config);
+
 static inline bool ena_com_get_adaptive_moderation_enabled(struct ena_com_dev *ena_dev)
 {
 	return ena_dev->adaptive_coalescing;
@@ -1082,4 +1093,21 @@ static inline void ena_com_update_intr_reg(struct ena_eth_io_intr_reg *intr_reg,
 		intr_reg->intr_control |= ENA_ETH_IO_INTR_REG_INTR_UNMASK_MASK;
 }
 
+static inline u8 *ena_com_get_next_bounce_buffer(struct ena_com_io_bounce_buffer_control *bounce_buf_ctrl)
+{
+	u16 size, buffers_num;
+	u8 *buf;
+
+	size = bounce_buf_ctrl->buffer_size;
+	buffers_num = bounce_buf_ctrl->buffers_num;
+
+	buf = bounce_buf_ctrl->base_buffer +
+		(bounce_buf_ctrl->next_to_use++ & (buffers_num - 1)) * size;
+
+	prefetchw(bounce_buf_ctrl->base_buffer +
+		(bounce_buf_ctrl->next_to_use & (buffers_num - 1)) * size);
+
+	return buf;
+}
+
 #endif /* !(ENA_COM) */
diff --git a/drivers/net/ethernet/amazon/ena/ena_eth_com.c b/drivers/net/ethernet/amazon/ena/ena_eth_com.c
index 9c0511e9f9a2..17107ca107e3 100644
--- a/drivers/net/ethernet/amazon/ena/ena_eth_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_eth_com.c
@@ -59,7 +59,7 @@ static inline struct ena_eth_io_rx_cdesc_base *ena_com_get_next_rx_cdesc(
 	return cdesc;
 }
 
-static inline void *get_sq_desc(struct ena_com_io_sq *io_sq)
+static inline void *get_sq_desc_regular_queue(struct ena_com_io_sq *io_sq)
 {
 	u16 tail_masked;
 	u32 offset;
@@ -71,45 +71,159 @@ static inline void *get_sq_desc(struct ena_com_io_sq *io_sq)
 	return (void *)((uintptr_t)io_sq->desc_addr.virt_addr + offset);
 }
 
-static inline void ena_com_copy_curr_sq_desc_to_dev(struct ena_com_io_sq *io_sq)
+static inline int ena_com_write_bounce_buffer_to_dev(struct ena_com_io_sq *io_sq,
+						     u8 *bounce_buffer)
 {
-	u16 tail_masked = io_sq->tail & (io_sq->q_depth - 1);
-	u32 offset = tail_masked * io_sq->desc_entry_size;
+	struct ena_com_llq_info *llq_info = &io_sq->llq_info;
 
-	/* In case this queue isn't a LLQ */
-	if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
-		return;
+	u16 dst_tail_mask;
+	u32 dst_offset;
 
-	memcpy_toio(io_sq->desc_addr.pbuf_dev_addr + offset,
-		    io_sq->desc_addr.virt_addr + offset,
-		    io_sq->desc_entry_size);
-}
+	dst_tail_mask = io_sq->tail & (io_sq->q_depth - 1);
+	dst_offset = dst_tail_mask * llq_info->desc_list_entry_size;
+
+	/* Make sure everything was written into the bounce buffer before
+	 * writing the bounce buffer to the device
+	 */
+	wmb();
+
+	/* The line is completed. Copy it to dev */
+	__iowrite64_copy(io_sq->desc_addr.pbuf_dev_addr + dst_offset,
+			 bounce_buffer, (llq_info->desc_list_entry_size) / 8);
 
-static inline void ena_com_sq_update_tail(struct ena_com_io_sq *io_sq)
-{
 	io_sq->tail++;
 
 	/* Switch phase bit in case of wrap around */
 	if (unlikely((io_sq->tail & (io_sq->q_depth - 1)) == 0))
 		io_sq->phase ^= 1;
+
+	return 0;
 }
 
-static inline int ena_com_write_header(struct ena_com_io_sq *io_sq,
-				       u8 *head_src, u16 header_len)
+static inline int ena_com_write_header_to_bounce(struct ena_com_io_sq *io_sq,
+						 u8 *header_src,
+						 u16 header_len)
 {
-	u16 tail_masked = io_sq->tail & (io_sq->q_depth - 1);
-	u8 __iomem *dev_head_addr =
-		io_sq->header_addr + (tail_masked * io_sq->tx_max_header_size);
+	struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl;
+	struct ena_com_llq_info *llq_info = &io_sq->llq_info;
+	u8 *bounce_buffer = pkt_ctrl->curr_bounce_buf;
+	u16 header_offset;
 
-	if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
+	if (unlikely(io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST))
 		return 0;
 
-	if (unlikely(!io_sq->header_addr)) {
-		pr_err("Push buffer header ptr is NULL\n");
-		return -EINVAL;
+	header_offset =
+		llq_info->descs_num_before_header * io_sq->desc_entry_size;
+
+	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");
+		return -EFAULT;
+	}
+
+	if (unlikely(!bounce_buffer)) {
+		pr_err("bounce buffer is NULL\n");
+		return -EFAULT;
+	}
+
+	memcpy(bounce_buffer + header_offset, header_src, header_len);
+
+	return 0;
+}
+
+static inline void *get_sq_desc_llq(struct ena_com_io_sq *io_sq)
+{
+	struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl;
+	u8 *bounce_buffer;
+	void *sq_desc;
+
+	bounce_buffer = pkt_ctrl->curr_bounce_buf;
+
+	if (unlikely(!bounce_buffer)) {
+		pr_err("bounce buffer is NULL\n");
+		return NULL;
+	}
+
+	sq_desc = bounce_buffer + pkt_ctrl->idx * io_sq->desc_entry_size;
+	pkt_ctrl->idx++;
+	pkt_ctrl->descs_left_in_line--;
+
+	return sq_desc;
+}
+
+static inline int ena_com_close_bounce_buffer(struct ena_com_io_sq *io_sq)
+{
+	struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl;
+	struct ena_com_llq_info *llq_info = &io_sq->llq_info;
+	int rc;
+
+	if (unlikely(io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST))
+		return 0;
+
+	/* bounce buffer was used, so write it and get a new one */
+	if (pkt_ctrl->idx) {
+		rc = ena_com_write_bounce_buffer_to_dev(io_sq,
+							pkt_ctrl->curr_bounce_buf);
+		if (unlikely(rc))
+			return rc;
+
+		pkt_ctrl->curr_bounce_buf =
+			ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl);
+		memset(io_sq->llq_buf_ctrl.curr_bounce_buf,
+		       0x0, llq_info->desc_list_entry_size);
+	}
+
+	pkt_ctrl->idx = 0;
+	pkt_ctrl->descs_left_in_line = llq_info->descs_num_before_header;
+	return 0;
+}
+
+static inline void *get_sq_desc(struct ena_com_io_sq *io_sq)
+{
+	if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
+		return get_sq_desc_llq(io_sq);
+
+	return get_sq_desc_regular_queue(io_sq);
+}
+
+static inline int ena_com_sq_update_llq_tail(struct ena_com_io_sq *io_sq)
+{
+	struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl;
+	struct ena_com_llq_info *llq_info = &io_sq->llq_info;
+	int rc;
+
+	if (!pkt_ctrl->descs_left_in_line) {
+		rc = ena_com_write_bounce_buffer_to_dev(io_sq,
+							pkt_ctrl->curr_bounce_buf);
+		if (unlikely(rc))
+			return rc;
+
+		pkt_ctrl->curr_bounce_buf =
+			ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl);
+			memset(io_sq->llq_buf_ctrl.curr_bounce_buf,
+			       0x0, llq_info->desc_list_entry_size);
+
+		pkt_ctrl->idx = 0;
+		if (unlikely(llq_info->desc_stride_ctrl == ENA_ADMIN_SINGLE_DESC_PER_ENTRY))
+			pkt_ctrl->descs_left_in_line = 1;
+		else
+			pkt_ctrl->descs_left_in_line =
+			llq_info->desc_list_entry_size / io_sq->desc_entry_size;
 	}
 
-	memcpy_toio(dev_head_addr, head_src, header_len);
+	return 0;
+}
+
+static inline int ena_com_sq_update_tail(struct ena_com_io_sq *io_sq)
+{
+	if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
+		return ena_com_sq_update_llq_tail(io_sq);
+
+	io_sq->tail++;
+
+	/* Switch phase bit in case of wrap around */
+	if (unlikely((io_sq->tail & (io_sq->q_depth - 1)) == 0))
+		io_sq->phase ^= 1;
 
 	return 0;
 }
@@ -177,8 +291,8 @@ static inline bool ena_com_meta_desc_changed(struct ena_com_io_sq *io_sq,
 	return false;
 }
 
-static inline void ena_com_create_and_store_tx_meta_desc(struct ena_com_io_sq *io_sq,
-							 struct ena_com_tx_ctx *ena_tx_ctx)
+static inline int ena_com_create_and_store_tx_meta_desc(struct ena_com_io_sq *io_sq,
+							struct ena_com_tx_ctx *ena_tx_ctx)
 {
 	struct ena_eth_io_tx_meta_desc *meta_desc = NULL;
 	struct ena_com_tx_meta *ena_meta = &ena_tx_ctx->ena_meta;
@@ -223,8 +337,7 @@ static inline void ena_com_create_and_store_tx_meta_desc(struct ena_com_io_sq *i
 	memcpy(&io_sq->cached_tx_meta, ena_meta,
 	       sizeof(struct ena_com_tx_meta));
 
-	ena_com_copy_curr_sq_desc_to_dev(io_sq);
-	ena_com_sq_update_tail(io_sq);
+	return ena_com_sq_update_tail(io_sq);
 }
 
 static inline void ena_com_rx_set_flags(struct ena_com_rx_ctx *ena_rx_ctx,
@@ -262,18 +375,19 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
 {
 	struct ena_eth_io_tx_desc *desc = NULL;
 	struct ena_com_buf *ena_bufs = ena_tx_ctx->ena_bufs;
-	void *push_header = ena_tx_ctx->push_header;
+	void *buffer_to_push = ena_tx_ctx->push_header;
 	u16 header_len = ena_tx_ctx->header_len;
 	u16 num_bufs = ena_tx_ctx->num_bufs;
-	int total_desc, i, rc;
+	u16 start_tail = io_sq->tail;
+	int i, rc;
 	bool have_meta;
 	u64 addr_hi;
 
 	WARN(io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_TX, "wrong Q type");
 
 	/* num_bufs +1 for potential meta desc */
-	if (ena_com_sq_empty_space(io_sq) < (num_bufs + 1)) {
-		pr_err("Not enough space in the tx queue\n");
+	if (unlikely(!ena_com_sq_have_enough_space(io_sq, num_bufs + 1))) {
+		pr_debug("Not enough space in the tx queue\n");
 		return -ENOMEM;
 	}
 
@@ -283,23 +397,32 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
 		return -EINVAL;
 	}
 
-	/* start with pushing the header (if needed) */
-	rc = ena_com_write_header(io_sq, push_header, header_len);
+	if (unlikely(io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV &&
+		     !buffer_to_push))
+		return -EINVAL;
+
+	rc = ena_com_write_header_to_bounce(io_sq, buffer_to_push, header_len);
 	if (unlikely(rc))
 		return rc;
 
 	have_meta = ena_tx_ctx->meta_valid && ena_com_meta_desc_changed(io_sq,
 			ena_tx_ctx);
-	if (have_meta)
-		ena_com_create_and_store_tx_meta_desc(io_sq, ena_tx_ctx);
+	if (have_meta) {
+		rc = ena_com_create_and_store_tx_meta_desc(io_sq, ena_tx_ctx);
+		if (unlikely(rc))
+			return rc;
+	}
 
-	/* If the caller doesn't want send packets */
+	/* If the caller doesn't want to send packets */
 	if (unlikely(!num_bufs && !header_len)) {
-		*nb_hw_desc = have_meta ? 0 : 1;
-		return 0;
+		rc = ena_com_close_bounce_buffer(io_sq);
+		*nb_hw_desc = io_sq->tail - start_tail;
+		return rc;
 	}
 
 	desc = get_sq_desc(io_sq);
+	if (unlikely(!desc))
+		return -EFAULT;
 	memset(desc, 0x0, sizeof(struct ena_eth_io_tx_desc));
 
 	/* Set first desc when we don't have meta descriptor */
@@ -351,10 +474,14 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
 	for (i = 0; i < num_bufs; i++) {
 		/* The first desc share the same desc as the header */
 		if (likely(i != 0)) {
-			ena_com_copy_curr_sq_desc_to_dev(io_sq);
-			ena_com_sq_update_tail(io_sq);
+			rc = ena_com_sq_update_tail(io_sq);
+			if (unlikely(rc))
+				return rc;
 
 			desc = get_sq_desc(io_sq);
+			if (unlikely(!desc))
+				return -EFAULT;
+
 			memset(desc, 0x0, sizeof(struct ena_eth_io_tx_desc));
 
 			desc->len_ctrl |= (io_sq->phase <<
@@ -377,15 +504,14 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
 	/* set the last desc indicator */
 	desc->len_ctrl |= ENA_ETH_IO_TX_DESC_LAST_MASK;
 
-	ena_com_copy_curr_sq_desc_to_dev(io_sq);
-
-	ena_com_sq_update_tail(io_sq);
+	rc = ena_com_sq_update_tail(io_sq);
+	if (unlikely(rc))
+		return rc;
 
-	total_desc = max_t(u16, num_bufs, 1);
-	total_desc += have_meta ? 1 : 0;
+	rc = ena_com_close_bounce_buffer(io_sq);
 
-	*nb_hw_desc = total_desc;
-	return 0;
+	*nb_hw_desc = io_sq->tail - start_tail;
+	return rc;
 }
 
 int ena_com_rx_pkt(struct ena_com_io_cq *io_cq,
@@ -444,15 +570,18 @@ int ena_com_add_single_rx_desc(struct ena_com_io_sq *io_sq,
 
 	WARN(io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX, "wrong Q type");
 
-	if (unlikely(ena_com_sq_empty_space(io_sq) == 0))
+	if (unlikely(!ena_com_sq_have_enough_space(io_sq, 1)))
 		return -ENOSPC;
 
 	desc = get_sq_desc(io_sq);
+	if (unlikely(!desc))
+		return -EFAULT;
+
 	memset(desc, 0x0, sizeof(struct ena_eth_io_rx_desc));
 
 	desc->length = ena_buf->len;
 
-	desc->ctrl |= ENA_ETH_IO_RX_DESC_FIRST_MASK;
+	desc->ctrl = ENA_ETH_IO_RX_DESC_FIRST_MASK;
 	desc->ctrl |= ENA_ETH_IO_RX_DESC_LAST_MASK;
 	desc->ctrl |= io_sq->phase & ENA_ETH_IO_RX_DESC_PHASE_MASK;
 	desc->ctrl |= ENA_ETH_IO_RX_DESC_COMP_REQ_MASK;
@@ -463,9 +592,7 @@ int ena_com_add_single_rx_desc(struct ena_com_io_sq *io_sq,
 	desc->buff_addr_hi =
 		((ena_buf->paddr & GENMASK_ULL(io_sq->dma_addr_bits - 1, 32)) >> 32);
 
-	ena_com_sq_update_tail(io_sq);
-
-	return 0;
+	return ena_com_sq_update_tail(io_sq);
 }
 
 bool ena_com_cq_empty(struct ena_com_io_cq *io_cq)
diff --git a/drivers/net/ethernet/amazon/ena/ena_eth_com.h b/drivers/net/ethernet/amazon/ena/ena_eth_com.h
index 4930324e9d8d..bcc84072367d 100644
--- a/drivers/net/ethernet/amazon/ena/ena_eth_com.h
+++ b/drivers/net/ethernet/amazon/ena/ena_eth_com.h
@@ -94,7 +94,7 @@ static inline void ena_com_unmask_intr(struct ena_com_io_cq *io_cq,
 	writel(intr_reg->intr_control, io_cq->unmask_reg);
 }
 
-static inline int ena_com_sq_empty_space(struct ena_com_io_sq *io_sq)
+static inline int ena_com_free_desc(struct ena_com_io_sq *io_sq)
 {
 	u16 tail, next_to_comp, cnt;
 
@@ -105,11 +105,28 @@ static inline int ena_com_sq_empty_space(struct ena_com_io_sq *io_sq)
 	return io_sq->q_depth - 1 - cnt;
 }
 
-static inline int ena_com_write_sq_doorbell(struct ena_com_io_sq *io_sq)
+/* Check if the submission queue has enough space to hold required_buffers */
+static inline bool ena_com_sq_have_enough_space(struct ena_com_io_sq *io_sq,
+						u16 required_buffers)
 {
-	u16 tail;
+	int temp;
 
-	tail = io_sq->tail;
+	if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
+		return ena_com_free_desc(io_sq) >= required_buffers;
+
+	/* This calculation doesn't need to be 100% accurate. So to reduce
+	 * the calculation overhead just Subtract 2 lines from the free descs
+	 * (one for the header line and one to compensate the devision
+	 * down calculation.
+	 */
+	temp = required_buffers / io_sq->llq_info.descs_per_entry + 2;
+
+	return ena_com_free_desc(io_sq) > temp;
+}
+
+static inline int ena_com_write_sq_doorbell(struct ena_com_io_sq *io_sq)
+{
+	u16 tail = io_sq->tail;
 
 	pr_debug("write submission queue doorbell for queue: %d tail: %d\n",
 		 io_sq->qid, tail);
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 789556960b8e..e732bd2ddd32 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -804,12 +804,13 @@ static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
 	 */
 	smp_mb();
 
-	above_thresh = ena_com_sq_empty_space(tx_ring->ena_com_io_sq) >
-		ENA_TX_WAKEUP_THRESH;
+	above_thresh = ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq,
+						    ENA_TX_WAKEUP_THRESH);
 	if (unlikely(netif_tx_queue_stopped(txq) && above_thresh)) {
 		__netif_tx_lock(txq, smp_processor_id());
-		above_thresh = ena_com_sq_empty_space(tx_ring->ena_com_io_sq) >
-			ENA_TX_WAKEUP_THRESH;
+		above_thresh =
+			ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq,
+						     ENA_TX_WAKEUP_THRESH);
 		if (netif_tx_queue_stopped(txq) && above_thresh) {
 			netif_tx_wake_queue(txq);
 			u64_stats_update_begin(&tx_ring->syncp);
@@ -1101,7 +1102,7 @@ static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
 
 	rx_ring->next_to_clean = next_to_clean;
 
-	refill_required = ena_com_sq_empty_space(rx_ring->ena_com_io_sq);
+	refill_required = ena_com_free_desc(rx_ring->ena_com_io_sq);
 	refill_threshold = rx_ring->ring_size / ENA_RX_REFILL_THRESH_DIVIDER;
 
 	/* Optimization, try to batch new rx buffers */
@@ -2115,8 +2116,8 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	 * to sgl_size + 2. one for the meta descriptor and one for header
 	 * (if the header is larger than tx_max_header_size).
 	 */
-	if (unlikely(ena_com_sq_empty_space(tx_ring->ena_com_io_sq) <
-		     (tx_ring->sgl_size + 2))) {
+	if (unlikely(!ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq,
+						   tx_ring->sgl_size + 2))) {
 		netif_dbg(adapter, tx_queued, dev, "%s stop queue %d\n",
 			  __func__, qid);
 
@@ -2135,8 +2136,8 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		 */
 		smp_mb();
 
-		if (ena_com_sq_empty_space(tx_ring->ena_com_io_sq)
-				> ENA_TX_WAKEUP_THRESH) {
+		if (ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq,
+						 ENA_TX_WAKEUP_THRESH)) {
 			netif_tx_wake_queue(txq);
 			u64_stats_update_begin(&tx_ring->syncp);
 			tx_ring->tx_stats.queue_wakeup++;
@@ -2813,7 +2814,7 @@ static void check_for_empty_rx_ring(struct ena_adapter *adapter)
 		rx_ring = &adapter->rx_ring[i];
 
 		refill_required =
-			ena_com_sq_empty_space(rx_ring->ena_com_io_sq);
+			ena_com_free_desc(rx_ring->ena_com_io_sq);
 		if (unlikely(refill_required == (rx_ring->ring_size - 1))) {
 			rx_ring->empty_rx_queue++;
 
-- 
2.19.1

From e4729991ed2e7e26e4b061369d7dee054ca4710f Mon Sep 17 00:00:00 2001
From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Thu, 11 Oct 2018 11:26:20 +0300
Subject: [PATCH 06/16] net: ena: add functions for handling Low Latency Queues
 in ena_netdev

This patch includes all code changes necessary in ena_netdev to enable
packet sending via the LLQ placemnt mode.

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amazon/ena/ena_ethtool.c |   1 +
 drivers/net/ethernet/amazon/ena/ena_netdev.c  | 387 +++++++++++-------
 drivers/net/ethernet/amazon/ena/ena_netdev.h  |   6 +
 3 files changed, 251 insertions(+), 143 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_ethtool.c b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
index 521607bc4393..fd28bd0d1c1e 100644
--- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c
+++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
@@ -81,6 +81,7 @@ static const struct ena_stats ena_stats_tx_strings[] = {
 	ENA_STAT_TX_ENTRY(doorbells),
 	ENA_STAT_TX_ENTRY(prepare_ctx_err),
 	ENA_STAT_TX_ENTRY(bad_req_id),
+	ENA_STAT_TX_ENTRY(llq_buffer_copy),
 	ENA_STAT_TX_ENTRY(missed_tx),
 };
 
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index e732bd2ddd32..fcdfaf0ab8a7 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -237,6 +237,17 @@ static int ena_setup_tx_resources(struct ena_adapter *adapter, int qid)
 		}
 	}
 
+	size = tx_ring->tx_max_header_size;
+	tx_ring->push_buf_intermediate_buf = vzalloc_node(size, node);
+	if (!tx_ring->push_buf_intermediate_buf) {
+		tx_ring->push_buf_intermediate_buf = vzalloc(size);
+		if (!tx_ring->push_buf_intermediate_buf) {
+			vfree(tx_ring->tx_buffer_info);
+			vfree(tx_ring->free_tx_ids);
+			return -ENOMEM;
+		}
+	}
+
 	/* Req id ring for TX out of order completions */
 	for (i = 0; i < tx_ring->ring_size; i++)
 		tx_ring->free_tx_ids[i] = i;
@@ -265,6 +276,9 @@ static void ena_free_tx_resources(struct ena_adapter *adapter, int qid)
 
 	vfree(tx_ring->free_tx_ids);
 	tx_ring->free_tx_ids = NULL;
+
+	vfree(tx_ring->push_buf_intermediate_buf);
+	tx_ring->push_buf_intermediate_buf = NULL;
 }
 
 /* ena_setup_all_tx_resources - allocate I/O Tx queues resources for All queues
@@ -602,6 +616,36 @@ static void ena_free_all_rx_bufs(struct ena_adapter *adapter)
 		ena_free_rx_bufs(adapter, i);
 }
 
+static inline void ena_unmap_tx_skb(struct ena_ring *tx_ring,
+				    struct ena_tx_buffer *tx_info)
+{
+	struct ena_com_buf *ena_buf;
+	u32 cnt;
+	int i;
+
+	ena_buf = tx_info->bufs;
+	cnt = tx_info->num_of_bufs;
+
+	if (unlikely(!cnt))
+		return;
+
+	if (tx_info->map_linear_data) {
+		dma_unmap_single(tx_ring->dev,
+				 dma_unmap_addr(ena_buf, paddr),
+				 dma_unmap_len(ena_buf, len),
+				 DMA_TO_DEVICE);
+		ena_buf++;
+		cnt--;
+	}
+
+	/* unmap remaining mapped pages */
+	for (i = 0; i < cnt; i++) {
+		dma_unmap_page(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
+			       dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
+		ena_buf++;
+	}
+}
+
 /* ena_free_tx_bufs - Free Tx Buffers per Queue
  * @tx_ring: TX ring for which buffers be freed
  */
@@ -612,9 +656,6 @@ static void ena_free_tx_bufs(struct ena_ring *tx_ring)
 
 	for (i = 0; i < tx_ring->ring_size; i++) {
 		struct ena_tx_buffer *tx_info = &tx_ring->tx_buffer_info[i];
-		struct ena_com_buf *ena_buf;
-		int nr_frags;
-		int j;
 
 		if (!tx_info->skb)
 			continue;
@@ -630,21 +671,7 @@ static void ena_free_tx_bufs(struct ena_ring *tx_ring)
 				   tx_ring->qid, i);
 		}
 
-		ena_buf = tx_info->bufs;
-		dma_unmap_single(tx_ring->dev,
-				 ena_buf->paddr,
-				 ena_buf->len,
-				 DMA_TO_DEVICE);
-
-		/* unmap remaining mapped pages */
-		nr_frags = tx_info->num_of_bufs - 1;
-		for (j = 0; j < nr_frags; j++) {
-			ena_buf++;
-			dma_unmap_page(tx_ring->dev,
-				       ena_buf->paddr,
-				       ena_buf->len,
-				       DMA_TO_DEVICE);
-		}
+		ena_unmap_tx_skb(tx_ring, tx_info);
 
 		dev_kfree_skb_any(tx_info->skb);
 	}
@@ -735,8 +762,6 @@ static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
 	while (tx_pkts < budget) {
 		struct ena_tx_buffer *tx_info;
 		struct sk_buff *skb;
-		struct ena_com_buf *ena_buf;
-		int i, nr_frags;
 
 		rc = ena_com_tx_comp_req_id_get(tx_ring->ena_com_io_cq,
 						&req_id);
@@ -756,24 +781,7 @@ static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
 		tx_info->skb = NULL;
 		tx_info->last_jiffies = 0;
 
-		if (likely(tx_info->num_of_bufs != 0)) {
-			ena_buf = tx_info->bufs;
-
-			dma_unmap_single(tx_ring->dev,
-					 dma_unmap_addr(ena_buf, paddr),
-					 dma_unmap_len(ena_buf, len),
-					 DMA_TO_DEVICE);
-
-			/* unmap remaining mapped pages */
-			nr_frags = tx_info->num_of_bufs - 1;
-			for (i = 0; i < nr_frags; i++) {
-				ena_buf++;
-				dma_unmap_page(tx_ring->dev,
-					       dma_unmap_addr(ena_buf, paddr),
-					       dma_unmap_len(ena_buf, len),
-					       DMA_TO_DEVICE);
-			}
-		}
+		ena_unmap_tx_skb(tx_ring, tx_info);
 
 		netif_dbg(tx_ring->adapter, tx_done, tx_ring->netdev,
 			  "tx_poll: q %d skb %p completed\n", tx_ring->qid,
@@ -1300,7 +1308,6 @@ static int ena_enable_msix(struct ena_adapter *adapter, int num_queues)
 
 	/* Reserved the max msix vectors we might need */
 	msix_vecs = ENA_MAX_MSIX_VEC(num_queues);
-
 	netif_dbg(adapter, probe, adapter->netdev,
 		  "trying to enable MSI-X, vectors %d\n", msix_vecs);
 
@@ -1591,7 +1598,7 @@ static int ena_up_complete(struct ena_adapter *adapter)
 
 static int ena_create_io_tx_queue(struct ena_adapter *adapter, int qid)
 {
-	struct ena_com_create_io_ctx ctx = { 0 };
+	struct ena_com_create_io_ctx ctx;
 	struct ena_com_dev *ena_dev;
 	struct ena_ring *tx_ring;
 	u32 msix_vector;
@@ -1604,6 +1611,8 @@ static int ena_create_io_tx_queue(struct ena_adapter *adapter, int qid)
 	msix_vector = ENA_IO_IRQ_IDX(qid);
 	ena_qid = ENA_IO_TXQ_IDX(qid);
 
+	memset(&ctx, 0x0, sizeof(ctx));
+
 	ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_TX;
 	ctx.qid = ena_qid;
 	ctx.mem_queue_type = ena_dev->tx_mem_queue_type;
@@ -1657,7 +1666,7 @@ static int ena_create_all_io_tx_queues(struct ena_adapter *adapter)
 static int ena_create_io_rx_queue(struct ena_adapter *adapter, int qid)
 {
 	struct ena_com_dev *ena_dev;
-	struct ena_com_create_io_ctx ctx = { 0 };
+	struct ena_com_create_io_ctx ctx;
 	struct ena_ring *rx_ring;
 	u32 msix_vector;
 	u16 ena_qid;
@@ -1669,6 +1678,8 @@ static int ena_create_io_rx_queue(struct ena_adapter *adapter, int qid)
 	msix_vector = ENA_IO_IRQ_IDX(qid);
 	ena_qid = ENA_IO_RXQ_IDX(qid);
 
+	memset(&ctx, 0x0, sizeof(ctx));
+
 	ctx.qid = ena_qid;
 	ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_RX;
 	ctx.mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
@@ -1986,73 +1997,70 @@ static int ena_check_and_linearize_skb(struct ena_ring *tx_ring,
 	return rc;
 }
 
-/* Called with netif_tx_lock. */
-static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
+static int ena_tx_map_skb(struct ena_ring *tx_ring,
+			  struct ena_tx_buffer *tx_info,
+			  struct sk_buff *skb,
+			  void **push_hdr,
+			  u16 *header_len)
 {
-	struct ena_adapter *adapter = netdev_priv(dev);
-	struct ena_tx_buffer *tx_info;
-	struct ena_com_tx_ctx ena_tx_ctx;
-	struct ena_ring *tx_ring;
-	struct netdev_queue *txq;
+	struct ena_adapter *adapter = tx_ring->adapter;
 	struct ena_com_buf *ena_buf;
-	void *push_hdr;
-	u32 len, last_frag;
-	u16 next_to_use;
-	u16 req_id;
-	u16 push_len;
-	u16 header_len;
 	dma_addr_t dma;
-	int qid, rc, nb_hw_desc;
-	int i = -1;
-
-	netif_dbg(adapter, tx_queued, dev, "%s skb %p\n", __func__, skb);
-	/*  Determine which tx ring we will be placed on */
-	qid = skb_get_queue_mapping(skb);
-	tx_ring = &adapter->tx_ring[qid];
-	txq = netdev_get_tx_queue(dev, qid);
-
-	rc = ena_check_and_linearize_skb(tx_ring, skb);
-	if (unlikely(rc))
-		goto error_drop_packet;
-
-	skb_tx_timestamp(skb);
-	len = skb_headlen(skb);
+	u32 skb_head_len, frag_len, last_frag;
+	u16 push_len = 0;
+	u16 delta = 0;
+	int i = 0;
 
-	next_to_use = tx_ring->next_to_use;
-	req_id = tx_ring->free_tx_ids[next_to_use];
-	tx_info = &tx_ring->tx_buffer_info[req_id];
-	tx_info->num_of_bufs = 0;
-
-	WARN(tx_info->skb, "SKB isn't NULL req_id %d\n", req_id);
-	ena_buf = tx_info->bufs;
+	skb_head_len = skb_headlen(skb);
 	tx_info->skb = skb;
+	ena_buf = tx_info->bufs;
 
 	if (tx_ring->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
-		/* prepared the push buffer */
-		push_len = min_t(u32, len, tx_ring->tx_max_header_size);
-		header_len = push_len;
-		push_hdr = skb->data;
+		/* When the device is LLQ mode, the driver will copy
+		 * the header into the device memory space.
+		 * the ena_com layer assume the header is in a linear
+		 * memory space.
+		 * This assumption might be wrong since part of the header
+		 * can be in the fragmented buffers.
+		 * Use skb_header_pointer to make sure the header is in a
+		 * linear memory space.
+		 */
+
+		push_len = min_t(u32, skb->len, tx_ring->tx_max_header_size);
+		*push_hdr = skb_header_pointer(skb, 0, push_len,
+					       tx_ring->push_buf_intermediate_buf);
+		*header_len = push_len;
+		if (unlikely(skb->data != *push_hdr)) {
+			u64_stats_update_begin(&tx_ring->syncp);
+			tx_ring->tx_stats.llq_buffer_copy++;
+			u64_stats_update_end(&tx_ring->syncp);
+
+			delta = push_len - skb_head_len;
+		}
 	} else {
-		push_len = 0;
-		header_len = min_t(u32, len, tx_ring->tx_max_header_size);
-		push_hdr = NULL;
+		*push_hdr = NULL;
+		*header_len = min_t(u32, skb_head_len,
+				    tx_ring->tx_max_header_size);
 	}
 
-	netif_dbg(adapter, tx_queued, dev,
+	netif_dbg(adapter, tx_queued, adapter->netdev,
 		  "skb: %p header_buf->vaddr: %p push_len: %d\n", skb,
-		  push_hdr, push_len);
+		  *push_hdr, push_len);
 
-	if (len > push_len) {
+	if (skb_head_len > push_len) {
 		dma = dma_map_single(tx_ring->dev, skb->data + push_len,
-				     len - push_len, DMA_TO_DEVICE);
-		if (dma_mapping_error(tx_ring->dev, dma))
+				     skb_head_len - push_len, DMA_TO_DEVICE);
+		if (unlikely(dma_mapping_error(tx_ring->dev, dma)))
 			goto error_report_dma_error;
 
 		ena_buf->paddr = dma;
-		ena_buf->len = len - push_len;
+		ena_buf->len = skb_head_len - push_len;
 
 		ena_buf++;
 		tx_info->num_of_bufs++;
+		tx_info->map_linear_data = 1;
+	} else {
+		tx_info->map_linear_data = 0;
 	}
 
 	last_frag = skb_shinfo(skb)->nr_frags;
@@ -2060,18 +2068,75 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	for (i = 0; i < last_frag; i++) {
 		const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 
-		len = skb_frag_size(frag);
-		dma = skb_frag_dma_map(tx_ring->dev, frag, 0, len,
-				       DMA_TO_DEVICE);
-		if (dma_mapping_error(tx_ring->dev, dma))
+		frag_len = skb_frag_size(frag);
+
+		if (unlikely(delta >= frag_len)) {
+			delta -= frag_len;
+			continue;
+		}
+
+		dma = skb_frag_dma_map(tx_ring->dev, frag, delta,
+				       frag_len - delta, DMA_TO_DEVICE);
+		if (unlikely(dma_mapping_error(tx_ring->dev, dma)))
 			goto error_report_dma_error;
 
 		ena_buf->paddr = dma;
-		ena_buf->len = len;
+		ena_buf->len = frag_len - delta;
 		ena_buf++;
+		tx_info->num_of_bufs++;
+		delta = 0;
 	}
 
-	tx_info->num_of_bufs += last_frag;
+	return 0;
+
+error_report_dma_error:
+	u64_stats_update_begin(&tx_ring->syncp);
+	tx_ring->tx_stats.dma_mapping_err++;
+	u64_stats_update_end(&tx_ring->syncp);
+	netdev_warn(adapter->netdev, "failed to map skb\n");
+
+	tx_info->skb = NULL;
+
+	tx_info->num_of_bufs += i;
+	ena_unmap_tx_skb(tx_ring, tx_info);
+
+	return -EINVAL;
+}
+
+/* Called with netif_tx_lock. */
+static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct ena_adapter *adapter = netdev_priv(dev);
+	struct ena_tx_buffer *tx_info;
+	struct ena_com_tx_ctx ena_tx_ctx;
+	struct ena_ring *tx_ring;
+	struct netdev_queue *txq;
+	void *push_hdr;
+	u16 next_to_use, req_id, header_len;
+	int qid, rc, nb_hw_desc;
+
+	netif_dbg(adapter, tx_queued, dev, "%s skb %p\n", __func__, skb);
+	/*  Determine which tx ring we will be placed on */
+	qid = skb_get_queue_mapping(skb);
+	tx_ring = &adapter->tx_ring[qid];
+	txq = netdev_get_tx_queue(dev, qid);
+
+	rc = ena_check_and_linearize_skb(tx_ring, skb);
+	if (unlikely(rc))
+		goto error_drop_packet;
+
+	skb_tx_timestamp(skb);
+
+	next_to_use = tx_ring->next_to_use;
+	req_id = tx_ring->free_tx_ids[next_to_use];
+	tx_info = &tx_ring->tx_buffer_info[req_id];
+	tx_info->num_of_bufs = 0;
+
+	WARN(tx_info->skb, "SKB isn't NULL req_id %d\n", req_id);
+
+	rc = ena_tx_map_skb(tx_ring, tx_info, skb, &push_hdr, &header_len);
+	if (unlikely(rc))
+		goto error_drop_packet;
 
 	memset(&ena_tx_ctx, 0x0, sizeof(struct ena_com_tx_ctx));
 	ena_tx_ctx.ena_bufs = tx_info->bufs;
@@ -2087,14 +2152,22 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	rc = ena_com_prepare_tx(tx_ring->ena_com_io_sq, &ena_tx_ctx,
 				&nb_hw_desc);
 
+	/* ena_com_prepare_tx() can't fail due to overflow of tx queue,
+	 * since the number of free descriptors in the queue is checked
+	 * after sending the previous packet. In case there isn't enough
+	 * space in the queue for the next packet, it is stopped
+	 * until there is again enough available space in the queue.
+	 * All other failure reasons of ena_com_prepare_tx() are fatal
+	 * and therefore require a device reset.
+	 */
 	if (unlikely(rc)) {
 		netif_err(adapter, tx_queued, dev,
 			  "failed to prepare tx bufs\n");
 		u64_stats_update_begin(&tx_ring->syncp);
-		tx_ring->tx_stats.queue_stop++;
 		tx_ring->tx_stats.prepare_ctx_err++;
 		u64_stats_update_end(&tx_ring->syncp);
-		netif_tx_stop_queue(txq);
+		adapter->reset_reason = ENA_REGS_RESET_DRIVER_INVALID_STATE;
+		set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
 		goto error_unmap_dma;
 	}
 
@@ -2157,35 +2230,11 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	return NETDEV_TX_OK;
 
-error_report_dma_error:
-	u64_stats_update_begin(&tx_ring->syncp);
-	tx_ring->tx_stats.dma_mapping_err++;
-	u64_stats_update_end(&tx_ring->syncp);
-	netdev_warn(adapter->netdev, "failed to map skb\n");
-
-	tx_info->skb = NULL;
-
 error_unmap_dma:
-	if (i >= 0) {
-		/* save value of frag that failed */
-		last_frag = i;
-
-		/* start back at beginning and unmap skb */
-		tx_info->skb = NULL;
-		ena_buf = tx_info->bufs;
-		dma_unmap_single(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
-				 dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
-
-		/* unmap remaining mapped pages */
-		for (i = 0; i < last_frag; i++) {
-			ena_buf++;
-			dma_unmap_page(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
-				       dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
-		}
-	}
+	ena_unmap_tx_skb(tx_ring, tx_info);
+	tx_info->skb = NULL;
 
 error_drop_packet:
-
 	dev_kfree_skb(skb);
 	return NETDEV_TX_OK;
 }
@@ -2621,7 +2670,9 @@ static int ena_restore_device(struct ena_adapter *adapter)
 
 	set_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
 	mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
-	dev_err(&pdev->dev, "Device reset completed successfully\n");
+	dev_err(&pdev->dev,
+		"Device reset completed successfully, Driver info: %s\n",
+		version);
 
 	return rc;
 err_disable_msix:
@@ -2988,18 +3039,52 @@ static int ena_calc_io_queue_num(struct pci_dev *pdev,
 	return io_queue_num;
 }
 
-static void ena_set_push_mode(struct pci_dev *pdev, struct ena_com_dev *ena_dev,
-			      struct ena_com_dev_get_features_ctx *get_feat_ctx)
+static int ena_set_queues_placement_policy(struct pci_dev *pdev,
+					   struct ena_com_dev *ena_dev,
+					   struct ena_admin_feature_llq_desc *llq,
+					   struct ena_llq_configurations *llq_default_configurations)
 {
 	bool has_mem_bar;
+	int rc;
+	u32 llq_feature_mask;
+
+	llq_feature_mask = 1 << ENA_ADMIN_LLQ;
+	if (!(ena_dev->supported_features & llq_feature_mask)) {
+		dev_err(&pdev->dev,
+			"LLQ is not supported Fallback to host mode policy.\n");
+		ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
+		return 0;
+	}
 
 	has_mem_bar = pci_select_bars(pdev, IORESOURCE_MEM) & BIT(ENA_MEM_BAR);
 
-	/* Enable push mode if device supports LLQ */
-	if (has_mem_bar && get_feat_ctx->max_queues.max_legacy_llq_num > 0)
-		ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
-	else
+	rc = ena_com_config_dev_mode(ena_dev, llq, llq_default_configurations);
+	if (unlikely(rc)) {
+		dev_err(&pdev->dev,
+			"Failed to configure the device mode.  Fallback to host mode policy.\n");
+		ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
+		return 0;
+	}
+
+	/* Nothing to config, exit */
+	if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
+		return 0;
+
+	if (!has_mem_bar) {
+		dev_err(&pdev->dev,
+			"ENA device does not expose LLQ bar. Fallback to host mode policy.\n");
 		ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
+		return 0;
+	}
+
+	ena_dev->mem_bar = devm_ioremap_wc(&pdev->dev,
+					   pci_resource_start(pdev, ENA_MEM_BAR),
+					   pci_resource_len(pdev, ENA_MEM_BAR));
+
+	if (!ena_dev->mem_bar)
+		return -EFAULT;
+
+	return 0;
 }
 
 static void ena_set_dev_offloads(struct ena_com_dev_get_features_ctx *feat,
@@ -3117,6 +3202,15 @@ static void ena_release_bars(struct ena_com_dev *ena_dev, struct pci_dev *pdev)
 	pci_release_selected_regions(pdev, release_bars);
 }
 
+static inline void set_default_llq_configurations(struct ena_llq_configurations *llq_config)
+{
+	llq_config->llq_header_location = ENA_ADMIN_INLINE_HEADER;
+	llq_config->llq_ring_entry_size = ENA_ADMIN_LIST_ENTRY_SIZE_128B;
+	llq_config->llq_stride_ctrl = ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY;
+	llq_config->llq_num_decs_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2;
+	llq_config->llq_ring_entry_size_value = 128;
+}
+
 static int ena_calc_queue_size(struct pci_dev *pdev,
 			       struct ena_com_dev *ena_dev,
 			       u16 *max_tx_sgl_size,
@@ -3165,7 +3259,9 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	static int version_printed;
 	struct net_device *netdev;
 	struct ena_adapter *adapter;
+	struct ena_llq_configurations llq_config;
 	struct ena_com_dev *ena_dev = NULL;
+	char *queue_type_str;
 	static int adapters_found;
 	int io_queue_num, bars, rc;
 	int queue_size;
@@ -3219,16 +3315,13 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto err_free_region;
 	}
 
-	ena_set_push_mode(pdev, ena_dev, &get_feat_ctx);
+	set_default_llq_configurations(&llq_config);
 
-	if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
-		ena_dev->mem_bar = devm_ioremap_wc(&pdev->dev,
-						   pci_resource_start(pdev, ENA_MEM_BAR),
-						   pci_resource_len(pdev, ENA_MEM_BAR));
-		if (!ena_dev->mem_bar) {
-			rc = -EFAULT;
-			goto err_device_destroy;
-		}
+	rc = ena_set_queues_placement_policy(pdev, ena_dev, &get_feat_ctx.llq,
+					     &llq_config);
+	if (rc) {
+		dev_err(&pdev->dev, "ena device init failed\n");
+		goto err_device_destroy;
 	}
 
 	/* initial Tx interrupt delay, Assumes 1 usec granularity.
@@ -3243,8 +3336,10 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto err_device_destroy;
 	}
 
-	dev_info(&pdev->dev, "creating %d io queues. queue size: %d\n",
-		 io_queue_num, queue_size);
+	dev_info(&pdev->dev, "creating %d io queues. queue size: %d. LLQ is %s\n",
+		 io_queue_num, queue_size,
+		 (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) ?
+		 "ENABLED" : "DISABLED");
 
 	/* dev zeroed in init_etherdev */
 	netdev = alloc_etherdev_mq(sizeof(struct ena_adapter), io_queue_num);
@@ -3334,9 +3429,15 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	timer_setup(&adapter->timer_service, ena_timer_service, 0);
 	mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
 
-	dev_info(&pdev->dev, "%s found at mem %lx, mac addr %pM Queues %d\n",
+	if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
+		queue_type_str = "Regular";
+	else
+		queue_type_str = "Low Latency";
+
+	dev_info(&pdev->dev,
+		 "%s found at mem %lx, mac addr %pM Queues %d, Placement policy: %s\n",
 		 DEVICE_NAME, (long)pci_resource_start(pdev, 0),
-		 netdev->dev_addr, io_queue_num);
+		 netdev->dev_addr, io_queue_num, queue_type_str);
 
 	set_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
 
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index 7c7ae56c52cf..4fa7d2fda475 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -151,6 +151,9 @@ struct ena_tx_buffer {
 	/* num of buffers used by this skb */
 	u32 num_of_bufs;
 
+	/* Indicate if bufs[0] map the linear data of the skb. */
+	u8 map_linear_data;
+
 	/* Used for detect missing tx packets to limit the number of prints */
 	u32 print_once;
 	/* Save the last jiffies to detect missing tx packets
@@ -186,6 +189,7 @@ struct ena_stats_tx {
 	u64 tx_poll;
 	u64 doorbells;
 	u64 bad_req_id;
+	u64 llq_buffer_copy;
 	u64 missed_tx;
 };
 
@@ -257,6 +261,8 @@ struct ena_ring {
 		struct ena_stats_tx tx_stats;
 		struct ena_stats_rx rx_stats;
 	};
+
+	u8 *push_buf_intermediate_buf;
 	int empty_rx_queue;
 } ____cacheline_aligned;
 
-- 
2.19.1

From 910193b2d74a25d62354ab63115cd9a28ece1add Mon Sep 17 00:00:00 2001
From: Peter Robinson <pbrobinson@gmail.com>
Date: Fri, 23 Nov 2018 12:33:42 +0000
Subject: [PATCH 07/16] net: ena: use CSUM_CHECKED device indication to report
 skb's checksum  status

Set skb->ip_summed to the correct value as reported by the device.
Add counter for the case where rx csum offload is enabled but
device didn't check it.

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
---
 drivers/net/ethernet/amazon/ena/ena_eth_com.c     |  3 +++
 drivers/net/ethernet/amazon/ena/ena_eth_com.h     |  1 +
 drivers/net/ethernet/amazon/ena/ena_eth_io_defs.h | 10 ++++++++--
 drivers/net/ethernet/amazon/ena/ena_ethtool.c     |  1 +
 drivers/net/ethernet/amazon/ena/ena_netdev.c      | 13 ++++++++++++-
 drivers/net/ethernet/amazon/ena/ena_netdev.h      |  1 +
 6 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_eth_com.c b/drivers/net/ethernet/amazon/ena/ena_eth_com.c
index 17107ca107e3..f6c2d3855be8 100644
--- a/drivers/net/ethernet/amazon/ena/ena_eth_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_eth_com.c
@@ -354,6 +354,9 @@ static inline void ena_com_rx_set_flags(struct ena_com_rx_ctx *ena_rx_ctx,
 	ena_rx_ctx->l4_csum_err =
 		!!((cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_MASK) >>
 		ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_SHIFT);
+	ena_rx_ctx->l4_csum_checked =
+		!!((cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_MASK) >>
+		ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_SHIFT);
 	ena_rx_ctx->hash = cdesc->hash;
 	ena_rx_ctx->frag =
 		(cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_MASK) >>
diff --git a/drivers/net/ethernet/amazon/ena/ena_eth_com.h b/drivers/net/ethernet/amazon/ena/ena_eth_com.h
index bcc84072367d..340d02b64ca6 100644
--- a/drivers/net/ethernet/amazon/ena/ena_eth_com.h
+++ b/drivers/net/ethernet/amazon/ena/ena_eth_com.h
@@ -67,6 +67,7 @@ struct ena_com_rx_ctx {
 	enum ena_eth_io_l4_proto_index l4_proto;
 	bool l3_csum_err;
 	bool l4_csum_err;
+	u8 l4_csum_checked;
 	/* fragmented packet */
 	bool frag;
 	u32 hash;
diff --git a/drivers/net/ethernet/amazon/ena/ena_eth_io_defs.h b/drivers/net/ethernet/amazon/ena/ena_eth_io_defs.h
index f320c58793a5..4c5ccaa13c42 100644
--- a/drivers/net/ethernet/amazon/ena/ena_eth_io_defs.h
+++ b/drivers/net/ethernet/amazon/ena/ena_eth_io_defs.h
@@ -242,9 +242,13 @@ struct ena_eth_io_rx_cdesc_base {
 	 *    checksum error detected, or, the controller didn't
 	 *    validate the checksum. This bit is valid only when
 	 *    l4_proto_idx indicates TCP/UDP packet, and,
-	 *    ipv4_frag is not set
+	 *    ipv4_frag is not set. This bit is valid only when
+	 *    l4_csum_checked below is set.
 	 * 15 : ipv4_frag - Indicates IPv4 fragmented packet
-	 * 23:16 : reserved16
+	 * 16 : l4_csum_checked - L4 checksum was verified
+	 *    (could be OK or error), when cleared the status of
+	 *    checksum is unknown
+	 * 23:17 : reserved17 - MBZ
 	 * 24 : phase
 	 * 25 : l3_csum2 - second checksum engine result
 	 * 26 : first - Indicates first descriptor in
@@ -390,6 +394,8 @@ struct ena_eth_io_numa_node_cfg_reg {
 #define ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_MASK BIT(14)
 #define ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_SHIFT 15
 #define ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_MASK BIT(15)
+#define ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_SHIFT 16
+#define ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_MASK BIT(16)
 #define ENA_ETH_IO_RX_CDESC_BASE_PHASE_SHIFT 24
 #define ENA_ETH_IO_RX_CDESC_BASE_PHASE_MASK BIT(24)
 #define ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM2_SHIFT 25
diff --git a/drivers/net/ethernet/amazon/ena/ena_ethtool.c b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
index fd28bd0d1c1e..f3a5a384e6e8 100644
--- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c
+++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
@@ -97,6 +97,7 @@ static const struct ena_stats ena_stats_rx_strings[] = {
 	ENA_STAT_RX_ENTRY(rx_copybreak_pkt),
 	ENA_STAT_RX_ENTRY(bad_req_id),
 	ENA_STAT_RX_ENTRY(empty_rx_ring),
+	ENA_STAT_RX_ENTRY(csum_unchecked),
 };
 
 static const struct ena_stats ena_stats_ena_com_strings[] = {
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index fcdfaf0ab8a7..35b0ce5db24b 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -994,8 +994,19 @@ static inline void ena_rx_checksum(struct ena_ring *rx_ring,
 			return;
 		}
 
-		skb->ip_summed = CHECKSUM_UNNECESSARY;
+		if (likely(ena_rx_ctx->l4_csum_checked)) {
+			skb->ip_summed = CHECKSUM_UNNECESSARY;
+		} else {
+			u64_stats_update_begin(&rx_ring->syncp);
+			rx_ring->rx_stats.csum_unchecked++;
+			u64_stats_update_end(&rx_ring->syncp);
+			skb->ip_summed = CHECKSUM_NONE;
+		}
+	} else {
+		skb->ip_summed = CHECKSUM_NONE;
+		return;
 	}
+
 }
 
 static void ena_set_rx_hash(struct ena_ring *rx_ring,
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index 4fa7d2fda475..2d62e2c7fed7 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -205,6 +205,7 @@ struct ena_stats_rx {
 	u64 rx_copybreak_pkt;
 	u64 bad_req_id;
 	u64 empty_rx_ring;
+	u64 csum_unchecked;
 };
 
 struct ena_ring {
-- 
2.19.1

From 20ba28b24e1d861ee3d8757fcadee46f742f29c5 Mon Sep 17 00:00:00 2001
From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Thu, 11 Oct 2018 11:26:22 +0300
Subject: [PATCH 08/16] net: ena: explicit casting and initialization, and
 clearer error handling

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amazon/ena/ena_com.c    | 39 ++++++++++++--------
 drivers/net/ethernet/amazon/ena/ena_netdev.c |  5 +--
 drivers/net/ethernet/amazon/ena/ena_netdev.h | 22 +++++------
 3 files changed, 36 insertions(+), 30 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c
index 5220c7578d6b..5c468b28723b 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -235,7 +235,7 @@ static struct ena_comp_ctx *__ena_com_submit_admin_cmd(struct ena_com_admin_queu
 	tail_masked = admin_queue->sq.tail & queue_size_mask;
 
 	/* In case of queue FULL */
-	cnt = atomic_read(&admin_queue->outstanding_cmds);
+	cnt = (u16)atomic_read(&admin_queue->outstanding_cmds);
 	if (cnt >= admin_queue->q_depth) {
 		pr_debug("admin queue is full.\n");
 		admin_queue->stats.out_of_space++;
@@ -304,7 +304,7 @@ static struct ena_comp_ctx *ena_com_submit_admin_cmd(struct ena_com_admin_queue
 						     struct ena_admin_acq_entry *comp,
 						     size_t comp_size_in_bytes)
 {
-	unsigned long flags;
+	unsigned long flags = 0;
 	struct ena_comp_ctx *comp_ctx;
 
 	spin_lock_irqsave(&admin_queue->q_lock, flags);
@@ -332,7 +332,7 @@ static int ena_com_init_io_sq(struct ena_com_dev *ena_dev,
 
 	memset(&io_sq->desc_addr, 0x0, sizeof(io_sq->desc_addr));
 
-	io_sq->dma_addr_bits = ena_dev->dma_addr_bits;
+	io_sq->dma_addr_bits = (u8)ena_dev->dma_addr_bits;
 	io_sq->desc_entry_size =
 		(io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
 		sizeof(struct ena_eth_io_tx_desc) :
@@ -486,7 +486,7 @@ static void ena_com_handle_admin_completion(struct ena_com_admin_queue *admin_qu
 
 	/* Go over all the completions */
 	while ((READ_ONCE(cqe->acq_common_descriptor.flags) &
-			ENA_ADMIN_ACQ_COMMON_DESC_PHASE_MASK) == phase) {
+		ENA_ADMIN_ACQ_COMMON_DESC_PHASE_MASK) == phase) {
 		/* Do not read the rest of the completion entry before the
 		 * phase bit was validated
 		 */
@@ -537,7 +537,8 @@ static int ena_com_comp_status_to_errno(u8 comp_status)
 static int ena_com_wait_and_process_admin_cq_polling(struct ena_comp_ctx *comp_ctx,
 						     struct ena_com_admin_queue *admin_queue)
 {
-	unsigned long flags, timeout;
+	unsigned long flags = 0;
+	unsigned long timeout;
 	int ret;
 
 	timeout = jiffies + usecs_to_jiffies(admin_queue->completion_timeout);
@@ -736,7 +737,7 @@ static int ena_com_config_llq_info(struct ena_com_dev *ena_dev,
 static int ena_com_wait_and_process_admin_cq_interrupts(struct ena_comp_ctx *comp_ctx,
 							struct ena_com_admin_queue *admin_queue)
 {
-	unsigned long flags;
+	unsigned long flags = 0;
 	int ret;
 
 	wait_for_completion_timeout(&comp_ctx->wait_event,
@@ -782,7 +783,7 @@ static u32 ena_com_reg_bar_read32(struct ena_com_dev *ena_dev, u16 offset)
 	volatile struct ena_admin_ena_mmio_req_read_less_resp *read_resp =
 		mmio_read->read_resp;
 	u32 mmio_read_reg, ret, i;
-	unsigned long flags;
+	unsigned long flags = 0;
 	u32 timeout = mmio_read->reg_read_to;
 
 	might_sleep();
@@ -1426,7 +1427,7 @@ void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev)
 void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev)
 {
 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
-	unsigned long flags;
+	unsigned long flags = 0;
 
 	spin_lock_irqsave(&admin_queue->q_lock, flags);
 	while (atomic_read(&admin_queue->outstanding_cmds) != 0) {
@@ -1470,7 +1471,7 @@ bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev)
 void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state)
 {
 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
-	unsigned long flags;
+	unsigned long flags = 0;
 
 	spin_lock_irqsave(&admin_queue->q_lock, flags);
 	ena_dev->admin_queue.running_state = state;
@@ -1504,7 +1505,7 @@ int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag)
 	}
 
 	if ((get_resp.u.aenq.supported_groups & groups_flag) != groups_flag) {
-		pr_warn("Trying to set unsupported aenq events. supported flag: %x asked flag: %x\n",
+		pr_warn("Trying to set unsupported aenq events. supported flag: 0x%x asked flag: 0x%x\n",
 			get_resp.u.aenq.supported_groups, groups_flag);
 		return -EOPNOTSUPP;
 	}
@@ -1652,7 +1653,7 @@ int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev)
 				    sizeof(*mmio_read->read_resp),
 				    &mmio_read->read_resp_dma_addr, GFP_KERNEL);
 	if (unlikely(!mmio_read->read_resp))
-		return -ENOMEM;
+		goto err;
 
 	ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
 
@@ -1661,6 +1662,10 @@ int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev)
 	mmio_read->readless_supported = true;
 
 	return 0;
+
+err:
+
+	return -ENOMEM;
 }
 
 void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev, bool readless_supported)
@@ -1961,6 +1966,7 @@ void ena_com_aenq_intr_handler(struct ena_com_dev *dev, void *data)
 	struct ena_admin_aenq_entry *aenq_e;
 	struct ena_admin_aenq_common_desc *aenq_common;
 	struct ena_com_aenq *aenq  = &dev->aenq;
+	unsigned long long timestamp;
 	ena_aenq_handler handler_cb;
 	u16 masked_head, processed = 0;
 	u8 phase;
@@ -1978,10 +1984,11 @@ void ena_com_aenq_intr_handler(struct ena_com_dev *dev, void *data)
 		 */
 		dma_rmb();
 
+		timestamp =
+			(unsigned long long)aenq_common->timestamp_low |
+			((unsigned long long)aenq_common->timestamp_high << 32);
 		pr_debug("AENQ! Group[%x] Syndrom[%x] timestamp: [%llus]\n",
-			 aenq_common->group, aenq_common->syndrom,
-			 (u64)aenq_common->timestamp_low +
-				 ((u64)aenq_common->timestamp_high << 32));
+			 aenq_common->group, aenq_common->syndrom, timestamp);
 
 		/* Handle specific event*/
 		handler_cb = ena_com_get_specific_aenq_cb(dev,
@@ -2623,8 +2630,8 @@ int ena_com_allocate_host_info(struct ena_com_dev *ena_dev)
 	if (unlikely(!host_attr->host_info))
 		return -ENOMEM;
 
-	host_attr->host_info->ena_spec_version =
-		((ENA_COMMON_SPEC_VERSION_MAJOR << ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) |
+	host_attr->host_info->ena_spec_version = ((ENA_COMMON_SPEC_VERSION_MAJOR <<
+		ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) |
 		(ENA_COMMON_SPEC_VERSION_MINOR));
 
 	return 0;
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 35b0ce5db24b..e345220b4d9a 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -2604,15 +2604,14 @@ static void ena_destroy_device(struct ena_adapter *adapter, bool graceful)
 
 	dev_up = test_bit(ENA_FLAG_DEV_UP, &adapter->flags);
 	adapter->dev_up_before_reset = dev_up;
-
 	if (!graceful)
 		ena_com_set_admin_running_state(ena_dev, false);
 
 	if (test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
 		ena_down(adapter);
 
-	/* Before releasing the ENA resources, a device reset is required.
-	 * (to prevent the device from accessing them).
+	/* Stop the device from sending AENQ events (in case reset flag is set
+	 *  and device is up, ena_close already reset the device
 	 * In case the reset flag is set and the device is up, ena_down()
 	 * already perform the reset, so it can be skipped.
 	 */
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index 2d62e2c7fed7..a16baf0124d5 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -61,6 +61,17 @@
 #define ENA_ADMIN_MSIX_VEC		1
 #define ENA_MAX_MSIX_VEC(io_queues)	(ENA_ADMIN_MSIX_VEC + (io_queues))
 
+/* The ENA buffer length fields is 16 bit long. So when PAGE_SIZE == 64kB the
+ * driver passes 0.
+ * Since the max packet size the ENA handles is ~9kB limit the buffer length to
+ * 16kB.
+ */
+#if PAGE_SIZE > SZ_16K
+#define ENA_PAGE_SIZE SZ_16K
+#else
+#define ENA_PAGE_SIZE PAGE_SIZE
+#endif
+
 #define ENA_MIN_MSIX_VEC		2
 
 #define ENA_REG_BAR			0
@@ -362,15 +373,4 @@ void ena_dump_stats_to_buf(struct ena_adapter *adapter, u8 *buf);
 
 int ena_get_sset_count(struct net_device *netdev, int sset);
 
-/* The ENA buffer length fields is 16 bit long. So when PAGE_SIZE == 64kB the
- * driver passas 0.
- * Since the max packet size the ENA handles is ~9kB limit the buffer length to
- * 16kB.
- */
-#if PAGE_SIZE > SZ_16K
-#define ENA_PAGE_SIZE SZ_16K
-#else
-#define ENA_PAGE_SIZE PAGE_SIZE
-#endif
-
 #endif /* !(ENA_H) */
-- 
2.19.1

From 7198e3afd93cabf55a3700cb015f59be831ecdcc Mon Sep 17 00:00:00 2001
From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Thu, 11 Oct 2018 11:26:23 +0300
Subject: [PATCH 09/16] net: ena: limit refill Rx threshold to 256 to avoid
 latency issues

Currently Rx refill is done when the number of required descriptors is
above 1/8 queue size. With a default of 1024 entries per queue the
threshold is 128 descriptors.
There is intention to increase the queue size to 8196 entries.
In this case threshold of 1024 descriptors is too large and can hurt
latency.
Add another limitation to Rx threshold to be at most 256 descriptors.

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 4 +++-
 drivers/net/ethernet/amazon/ena/ena_netdev.h | 5 +++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index e345220b4d9a..c4c33b174e17 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -1122,7 +1122,9 @@ static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
 	rx_ring->next_to_clean = next_to_clean;
 
 	refill_required = ena_com_free_desc(rx_ring->ena_com_io_sq);
-	refill_threshold = rx_ring->ring_size / ENA_RX_REFILL_THRESH_DIVIDER;
+	refill_threshold =
+		min_t(int, rx_ring->ring_size / ENA_RX_REFILL_THRESH_DIVIDER,
+		      ENA_RX_REFILL_THRESH_PACKET);
 
 	/* Optimization, try to batch new rx buffers */
 	if (refill_required > refill_threshold) {
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index a16baf0124d5..0cf35ae77884 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -106,10 +106,11 @@
  */
 #define ENA_TX_POLL_BUDGET_DIVIDER	4
 
-/* Refill Rx queue when number of available descriptors is below
- * QUEUE_SIZE / ENA_RX_REFILL_THRESH_DIVIDER
+/* Refill Rx queue when number of required descriptors is above
+ * QUEUE_SIZE / ENA_RX_REFILL_THRESH_DIVIDER or ENA_RX_REFILL_THRESH_PACKET
  */
 #define ENA_RX_REFILL_THRESH_DIVIDER	8
+#define ENA_RX_REFILL_THRESH_PACKET	256
 
 /* Number of queues to check for missing queues per timer service */
 #define ENA_MONITORED_TX_QUEUES	4
-- 
2.19.1

From 9fa751367f9fec718f4bb014e136fa5aecfb836c Mon Sep 17 00:00:00 2001
From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Thu, 11 Oct 2018 11:26:24 +0300
Subject: [PATCH 10/16] net: ena: change rx copybreak default to reduce kernel
 memory pressure

Improves socket memory utilization when receiving packets larger
than 128 bytes (the previous rx copybreak) and smaller than 256 bytes.

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index 0cf35ae77884..d241dfc542ca 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -81,7 +81,7 @@
 #define ENA_DEFAULT_RING_SIZE	(1024)
 
 #define ENA_TX_WAKEUP_THRESH		(MAX_SKB_FRAGS + 2)
-#define ENA_DEFAULT_RX_COPYBREAK	(128 - NET_IP_ALIGN)
+#define ENA_DEFAULT_RX_COPYBREAK	(256 - NET_IP_ALIGN)
 
 /* limit the buffer size to 600 bytes to handle MTU changes from very
  * small to very large, in which case the number of buffers per packet
-- 
2.19.1

From 3bd1427b1dc5fff10b94528a7b0d7898b67073ce Mon Sep 17 00:00:00 2001
From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Thu, 11 Oct 2018 11:26:25 +0300
Subject: [PATCH 11/16] net: ena: remove redundant parameter in
 ena_com_admin_init()

Remove redundant spinlock acquire parameter from ena_com_admin_init()

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amazon/ena/ena_com.c    | 6 ++----
 drivers/net/ethernet/amazon/ena/ena_com.h    | 5 +----
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 2 +-
 3 files changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c
index 5c468b28723b..420cede41ca4 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -1701,8 +1701,7 @@ void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev)
 }
 
 int ena_com_admin_init(struct ena_com_dev *ena_dev,
-		       struct ena_aenq_handlers *aenq_handlers,
-		       bool init_spinlock)
+		       struct ena_aenq_handlers *aenq_handlers)
 {
 	struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
 	u32 aq_caps, acq_caps, dev_sts, addr_low, addr_high;
@@ -1728,8 +1727,7 @@ int ena_com_admin_init(struct ena_com_dev *ena_dev,
 
 	atomic_set(&admin_queue->outstanding_cmds, 0);
 
-	if (init_spinlock)
-		spin_lock_init(&admin_queue->q_lock);
+	spin_lock_init(&admin_queue->q_lock);
 
 	ret = ena_com_init_comp_ctxt(admin_queue);
 	if (ret)
diff --git a/drivers/net/ethernet/amazon/ena/ena_com.h b/drivers/net/ethernet/amazon/ena/ena_com.h
index 25af8d025919..ae8b4857fce3 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.h
+++ b/drivers/net/ethernet/amazon/ena/ena_com.h
@@ -436,8 +436,6 @@ void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev);
 /* ena_com_admin_init - Init the admin and the async queues
  * @ena_dev: ENA communication layer struct
  * @aenq_handlers: Those handlers to be called upon event.
- * @init_spinlock: Indicate if this method should init the admin spinlock or
- * the spinlock was init before (for example, in a case of FLR).
  *
  * Initialize the admin submission and completion queues.
  * Initialize the asynchronous events notification queues.
@@ -445,8 +443,7 @@ void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev);
  * @return - 0 on success, negative value on failure.
  */
 int ena_com_admin_init(struct ena_com_dev *ena_dev,
-		       struct ena_aenq_handlers *aenq_handlers,
-		       bool init_spinlock);
+		       struct ena_aenq_handlers *aenq_handlers);
 
 /* ena_com_admin_destroy - Destroy the admin and the async events queues.
  * @ena_dev: ENA communication layer struct
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index c4c33b174e17..284a0a612131 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -2508,7 +2508,7 @@ static int ena_device_init(struct ena_com_dev *ena_dev, struct pci_dev *pdev,
 	}
 
 	/* ENA admin level init */
-	rc = ena_com_admin_init(ena_dev, &aenq_handlers, true);
+	rc = ena_com_admin_init(ena_dev, &aenq_handlers);
 	if (rc) {
 		dev_err(dev,
 			"Can not initialize ena admin queue with device\n");
-- 
2.19.1

From f9f5dc0c8ab71ed9b98761eea2995b46983131bf Mon Sep 17 00:00:00 2001
From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Thu, 11 Oct 2018 11:26:26 +0300
Subject: [PATCH 12/16] net: ena: update driver version to 2.0.1

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index d241dfc542ca..521873642339 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -43,9 +43,9 @@
 #include "ena_com.h"
 #include "ena_eth_com.h"
 
-#define DRV_MODULE_VER_MAJOR	1
-#define DRV_MODULE_VER_MINOR	5
-#define DRV_MODULE_VER_SUBMINOR 0
+#define DRV_MODULE_VER_MAJOR	2
+#define DRV_MODULE_VER_MINOR	0
+#define DRV_MODULE_VER_SUBMINOR 1
 
 #define DRV_MODULE_NAME		"ena"
 #ifndef DRV_MODULE_VERSION
-- 
2.19.1

From 24f2b7764070e2e4cd8a2b056854f1928918887e Mon Sep 17 00:00:00 2001
From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Thu, 11 Oct 2018 11:26:27 +0300
Subject: [PATCH 13/16] net: ena: fix indentations in ena_defs for better
 readability

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 .../net/ethernet/amazon/ena/ena_admin_defs.h  | 334 +++++++-----------
 .../net/ethernet/amazon/ena/ena_eth_io_defs.h | 223 ++++++------
 .../net/ethernet/amazon/ena/ena_regs_defs.h   | 206 +++++------
 3 files changed, 338 insertions(+), 425 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_admin_defs.h b/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
index b439ec1b3edb..9f80b73f90b1 100644
--- a/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
+++ b/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
@@ -32,119 +32,81 @@
 #ifndef _ENA_ADMIN_H_
 #define _ENA_ADMIN_H_
 
-enum ena_admin_aq_opcode {
-	ENA_ADMIN_CREATE_SQ	= 1,
-
-	ENA_ADMIN_DESTROY_SQ	= 2,
-
-	ENA_ADMIN_CREATE_CQ	= 3,
-
-	ENA_ADMIN_DESTROY_CQ	= 4,
-
-	ENA_ADMIN_GET_FEATURE	= 8,
 
-	ENA_ADMIN_SET_FEATURE	= 9,
-
-	ENA_ADMIN_GET_STATS	= 11,
+enum ena_admin_aq_opcode {
+	ENA_ADMIN_CREATE_SQ                         = 1,
+	ENA_ADMIN_DESTROY_SQ                        = 2,
+	ENA_ADMIN_CREATE_CQ                         = 3,
+	ENA_ADMIN_DESTROY_CQ                        = 4,
+	ENA_ADMIN_GET_FEATURE                       = 8,
+	ENA_ADMIN_SET_FEATURE                       = 9,
+	ENA_ADMIN_GET_STATS                         = 11,
 };
 
 enum ena_admin_aq_completion_status {
-	ENA_ADMIN_SUCCESS			= 0,
-
-	ENA_ADMIN_RESOURCE_ALLOCATION_FAILURE	= 1,
-
-	ENA_ADMIN_BAD_OPCODE			= 2,
-
-	ENA_ADMIN_UNSUPPORTED_OPCODE		= 3,
-
-	ENA_ADMIN_MALFORMED_REQUEST		= 4,
-
+	ENA_ADMIN_SUCCESS                           = 0,
+	ENA_ADMIN_RESOURCE_ALLOCATION_FAILURE       = 1,
+	ENA_ADMIN_BAD_OPCODE                        = 2,
+	ENA_ADMIN_UNSUPPORTED_OPCODE                = 3,
+	ENA_ADMIN_MALFORMED_REQUEST                 = 4,
 	/* Additional status is provided in ACQ entry extended_status */
-	ENA_ADMIN_ILLEGAL_PARAMETER		= 5,
-
-	ENA_ADMIN_UNKNOWN_ERROR			= 6,
-
-	ENA_ADMIN_RESOURCE_BUSY                 = 7,
+	ENA_ADMIN_ILLEGAL_PARAMETER                 = 5,
+	ENA_ADMIN_UNKNOWN_ERROR                     = 6,
+	ENA_ADMIN_RESOURCE_BUSY                     = 7,
 };
 
 enum ena_admin_aq_feature_id {
-	ENA_ADMIN_DEVICE_ATTRIBUTES		= 1,
-
-	ENA_ADMIN_MAX_QUEUES_NUM		= 2,
-
-	ENA_ADMIN_HW_HINTS			= 3,
-
-	ENA_ADMIN_LLQ                           = 4,
-
-	ENA_ADMIN_RSS_HASH_FUNCTION		= 10,
-
-	ENA_ADMIN_STATELESS_OFFLOAD_CONFIG	= 11,
-
-	ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG	= 12,
-
-	ENA_ADMIN_MTU				= 14,
-
-	ENA_ADMIN_RSS_HASH_INPUT		= 18,
-
-	ENA_ADMIN_INTERRUPT_MODERATION		= 20,
-
-	ENA_ADMIN_AENQ_CONFIG			= 26,
-
-	ENA_ADMIN_LINK_CONFIG			= 27,
-
-	ENA_ADMIN_HOST_ATTR_CONFIG		= 28,
-
-	ENA_ADMIN_FEATURES_OPCODE_NUM		= 32,
+	ENA_ADMIN_DEVICE_ATTRIBUTES                 = 1,
+	ENA_ADMIN_MAX_QUEUES_NUM                    = 2,
+	ENA_ADMIN_HW_HINTS                          = 3,
+	ENA_ADMIN_LLQ                               = 4,
+	ENA_ADMIN_RSS_HASH_FUNCTION                 = 10,
+	ENA_ADMIN_STATELESS_OFFLOAD_CONFIG          = 11,
+	ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG      = 12,
+	ENA_ADMIN_MTU                               = 14,
+	ENA_ADMIN_RSS_HASH_INPUT                    = 18,
+	ENA_ADMIN_INTERRUPT_MODERATION              = 20,
+	ENA_ADMIN_AENQ_CONFIG                       = 26,
+	ENA_ADMIN_LINK_CONFIG                       = 27,
+	ENA_ADMIN_HOST_ATTR_CONFIG                  = 28,
+	ENA_ADMIN_FEATURES_OPCODE_NUM               = 32,
 };
 
 enum ena_admin_placement_policy_type {
 	/* descriptors and headers are in host memory */
-	ENA_ADMIN_PLACEMENT_POLICY_HOST	= 1,
-
+	ENA_ADMIN_PLACEMENT_POLICY_HOST             = 1,
 	/* descriptors and headers are in device memory (a.k.a Low Latency
 	 * Queue)
 	 */
-	ENA_ADMIN_PLACEMENT_POLICY_DEV	= 3,
+	ENA_ADMIN_PLACEMENT_POLICY_DEV              = 3,
 };
 
 enum ena_admin_link_types {
-	ENA_ADMIN_LINK_SPEED_1G		= 0x1,
-
-	ENA_ADMIN_LINK_SPEED_2_HALF_G	= 0x2,
-
-	ENA_ADMIN_LINK_SPEED_5G		= 0x4,
-
-	ENA_ADMIN_LINK_SPEED_10G	= 0x8,
-
-	ENA_ADMIN_LINK_SPEED_25G	= 0x10,
-
-	ENA_ADMIN_LINK_SPEED_40G	= 0x20,
-
-	ENA_ADMIN_LINK_SPEED_50G	= 0x40,
-
-	ENA_ADMIN_LINK_SPEED_100G	= 0x80,
-
-	ENA_ADMIN_LINK_SPEED_200G	= 0x100,
-
-	ENA_ADMIN_LINK_SPEED_400G	= 0x200,
+	ENA_ADMIN_LINK_SPEED_1G                     = 0x1,
+	ENA_ADMIN_LINK_SPEED_2_HALF_G               = 0x2,
+	ENA_ADMIN_LINK_SPEED_5G                     = 0x4,
+	ENA_ADMIN_LINK_SPEED_10G                    = 0x8,
+	ENA_ADMIN_LINK_SPEED_25G                    = 0x10,
+	ENA_ADMIN_LINK_SPEED_40G                    = 0x20,
+	ENA_ADMIN_LINK_SPEED_50G                    = 0x40,
+	ENA_ADMIN_LINK_SPEED_100G                   = 0x80,
+	ENA_ADMIN_LINK_SPEED_200G                   = 0x100,
+	ENA_ADMIN_LINK_SPEED_400G                   = 0x200,
 };
 
 enum ena_admin_completion_policy_type {
 	/* completion queue entry for each sq descriptor */
-	ENA_ADMIN_COMPLETION_POLICY_DESC		= 0,
-
+	ENA_ADMIN_COMPLETION_POLICY_DESC            = 0,
 	/* completion queue entry upon request in sq descriptor */
-	ENA_ADMIN_COMPLETION_POLICY_DESC_ON_DEMAND	= 1,
-
+	ENA_ADMIN_COMPLETION_POLICY_DESC_ON_DEMAND  = 1,
 	/* current queue head pointer is updated in OS memory upon sq
 	 * descriptor request
 	 */
-	ENA_ADMIN_COMPLETION_POLICY_HEAD_ON_DEMAND	= 2,
-
+	ENA_ADMIN_COMPLETION_POLICY_HEAD_ON_DEMAND  = 2,
 	/* current queue head pointer is updated in OS memory for each sq
 	 * descriptor
 	 */
-	ENA_ADMIN_COMPLETION_POLICY_HEAD		= 3,
+	ENA_ADMIN_COMPLETION_POLICY_HEAD            = 3,
 };
 
 /* basic stats return ena_admin_basic_stats while extanded stats return a
@@ -152,15 +114,13 @@ enum ena_admin_completion_policy_type {
  * device id
  */
 enum ena_admin_get_stats_type {
-	ENA_ADMIN_GET_STATS_TYPE_BASIC		= 0,
-
-	ENA_ADMIN_GET_STATS_TYPE_EXTENDED	= 1,
+	ENA_ADMIN_GET_STATS_TYPE_BASIC              = 0,
+	ENA_ADMIN_GET_STATS_TYPE_EXTENDED           = 1,
 };
 
 enum ena_admin_get_stats_scope {
-	ENA_ADMIN_SPECIFIC_QUEUE	= 0,
-
-	ENA_ADMIN_ETH_TRAFFIC		= 1,
+	ENA_ADMIN_SPECIFIC_QUEUE                    = 0,
+	ENA_ADMIN_ETH_TRAFFIC                       = 1,
 };
 
 struct ena_admin_aq_common_desc {
@@ -231,7 +191,9 @@ struct ena_admin_acq_common_desc {
 
 	u16 extended_status;
 
-	/* serves as a hint what AQ entries can be revoked */
+	/* indicates to the driver which AQ entry has been consumed by the
+	 *    device and could be reused
+	 */
 	u16 sq_head_indx;
 };
 
@@ -300,9 +262,8 @@ struct ena_admin_aq_create_sq_cmd {
 };
 
 enum ena_admin_sq_direction {
-	ENA_ADMIN_SQ_DIRECTION_TX	= 1,
-
-	ENA_ADMIN_SQ_DIRECTION_RX	= 2,
+	ENA_ADMIN_SQ_DIRECTION_TX                   = 1,
+	ENA_ADMIN_SQ_DIRECTION_RX                   = 2,
 };
 
 struct ena_admin_acq_create_sq_resp_desc {
@@ -664,9 +625,8 @@ struct ena_admin_feature_offload_desc {
 };
 
 enum ena_admin_hash_functions {
-	ENA_ADMIN_TOEPLITZ	= 1,
-
-	ENA_ADMIN_CRC32		= 2,
+	ENA_ADMIN_TOEPLITZ                          = 1,
+	ENA_ADMIN_CRC32                             = 2,
 };
 
 struct ena_admin_feature_rss_flow_hash_control {
@@ -692,50 +652,35 @@ struct ena_admin_feature_rss_flow_hash_function {
 
 /* RSS flow hash protocols */
 enum ena_admin_flow_hash_proto {
-	ENA_ADMIN_RSS_TCP4	= 0,
-
-	ENA_ADMIN_RSS_UDP4	= 1,
-
-	ENA_ADMIN_RSS_TCP6	= 2,
-
-	ENA_ADMIN_RSS_UDP6	= 3,
-
-	ENA_ADMIN_RSS_IP4	= 4,
-
-	ENA_ADMIN_RSS_IP6	= 5,
-
-	ENA_ADMIN_RSS_IP4_FRAG	= 6,
-
-	ENA_ADMIN_RSS_NOT_IP	= 7,
-
+	ENA_ADMIN_RSS_TCP4                          = 0,
+	ENA_ADMIN_RSS_UDP4                          = 1,
+	ENA_ADMIN_RSS_TCP6                          = 2,
+	ENA_ADMIN_RSS_UDP6                          = 3,
+	ENA_ADMIN_RSS_IP4                           = 4,
+	ENA_ADMIN_RSS_IP6                           = 5,
+	ENA_ADMIN_RSS_IP4_FRAG                      = 6,
+	ENA_ADMIN_RSS_NOT_IP                        = 7,
 	/* TCPv6 with extension header */
-	ENA_ADMIN_RSS_TCP6_EX	= 8,
-
+	ENA_ADMIN_RSS_TCP6_EX                       = 8,
 	/* IPv6 with extension header */
-	ENA_ADMIN_RSS_IP6_EX	= 9,
-
-	ENA_ADMIN_RSS_PROTO_NUM	= 16,
+	ENA_ADMIN_RSS_IP6_EX                        = 9,
+	ENA_ADMIN_RSS_PROTO_NUM                     = 16,
 };
 
 /* RSS flow hash fields */
 enum ena_admin_flow_hash_fields {
 	/* Ethernet Dest Addr */
-	ENA_ADMIN_RSS_L2_DA	= BIT(0),
-
+	ENA_ADMIN_RSS_L2_DA                         = BIT(0),
 	/* Ethernet Src Addr */
-	ENA_ADMIN_RSS_L2_SA	= BIT(1),
-
+	ENA_ADMIN_RSS_L2_SA                         = BIT(1),
 	/* ipv4/6 Dest Addr */
-	ENA_ADMIN_RSS_L3_DA	= BIT(2),
-
+	ENA_ADMIN_RSS_L3_DA                         = BIT(2),
 	/* ipv4/6 Src Addr */
-	ENA_ADMIN_RSS_L3_SA	= BIT(3),
-
+	ENA_ADMIN_RSS_L3_SA                         = BIT(3),
 	/* tcp/udp Dest Port */
-	ENA_ADMIN_RSS_L4_DP	= BIT(4),
-
+	ENA_ADMIN_RSS_L4_DP                         = BIT(4),
 	/* tcp/udp Src Port */
-	ENA_ADMIN_RSS_L4_SP	= BIT(5),
+	ENA_ADMIN_RSS_L4_SP                         = BIT(5),
 };
 
 struct ena_admin_proto_input {
@@ -774,19 +719,13 @@ struct ena_admin_feature_rss_flow_hash_input {
 };
 
 enum ena_admin_os_type {
-	ENA_ADMIN_OS_LINUX	= 1,
-
-	ENA_ADMIN_OS_WIN	= 2,
-
-	ENA_ADMIN_OS_DPDK	= 3,
-
-	ENA_ADMIN_OS_FREEBSD	= 4,
-
-	ENA_ADMIN_OS_IPXE	= 5,
-
-	ENA_ADMIN_OS_ESXI       = 6,
-
-	ENA_ADMIN_OS_GROUPS_NUM = 6,
+	ENA_ADMIN_OS_LINUX                          = 1,
+	ENA_ADMIN_OS_WIN                            = 2,
+	ENA_ADMIN_OS_DPDK                           = 3,
+	ENA_ADMIN_OS_FREEBSD                        = 4,
+	ENA_ADMIN_OS_IPXE                           = 5,
+	ENA_ADMIN_OS_ESXI			    = 6,
+	ENA_ADMIN_OS_GROUPS_NUM			    = 6,
 };
 
 struct ena_admin_host_info {
@@ -981,25 +920,18 @@ struct ena_admin_aenq_common_desc {
 
 /* asynchronous event notification groups */
 enum ena_admin_aenq_group {
-	ENA_ADMIN_LINK_CHANGE		= 0,
-
-	ENA_ADMIN_FATAL_ERROR		= 1,
-
-	ENA_ADMIN_WARNING		= 2,
-
-	ENA_ADMIN_NOTIFICATION		= 3,
-
-	ENA_ADMIN_KEEP_ALIVE		= 4,
-
-	ENA_ADMIN_AENQ_GROUPS_NUM	= 5,
+	ENA_ADMIN_LINK_CHANGE                       = 0,
+	ENA_ADMIN_FATAL_ERROR                       = 1,
+	ENA_ADMIN_WARNING                           = 2,
+	ENA_ADMIN_NOTIFICATION                      = 3,
+	ENA_ADMIN_KEEP_ALIVE                        = 4,
+	ENA_ADMIN_AENQ_GROUPS_NUM                   = 5,
 };
 
 enum ena_admin_aenq_notification_syndrom {
-	ENA_ADMIN_SUSPEND	= 0,
-
-	ENA_ADMIN_RESUME	= 1,
-
-	ENA_ADMIN_UPDATE_HINTS	= 2,
+	ENA_ADMIN_SUSPEND                           = 0,
+	ENA_ADMIN_RESUME                            = 1,
+	ENA_ADMIN_UPDATE_HINTS                      = 2,
 };
 
 struct ena_admin_aenq_entry {
@@ -1034,27 +966,27 @@ struct ena_admin_ena_mmio_req_read_less_resp {
 };
 
 /* aq_common_desc */
-#define ENA_ADMIN_AQ_COMMON_DESC_COMMAND_ID_MASK GENMASK(11, 0)
-#define ENA_ADMIN_AQ_COMMON_DESC_PHASE_MASK BIT(0)
-#define ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_SHIFT 1
-#define ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_MASK BIT(1)
-#define ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_SHIFT 2
-#define ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK BIT(2)
+#define ENA_ADMIN_AQ_COMMON_DESC_COMMAND_ID_MASK            GENMASK(11, 0)
+#define ENA_ADMIN_AQ_COMMON_DESC_PHASE_MASK                 BIT(0)
+#define ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_SHIFT            1
+#define ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_MASK             BIT(1)
+#define ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_SHIFT   2
+#define ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK    BIT(2)
 
 /* sq */
-#define ENA_ADMIN_SQ_SQ_DIRECTION_SHIFT 5
-#define ENA_ADMIN_SQ_SQ_DIRECTION_MASK GENMASK(7, 5)
+#define ENA_ADMIN_SQ_SQ_DIRECTION_SHIFT                     5
+#define ENA_ADMIN_SQ_SQ_DIRECTION_MASK                      GENMASK(7, 5)
 
 /* acq_common_desc */
-#define ENA_ADMIN_ACQ_COMMON_DESC_COMMAND_ID_MASK GENMASK(11, 0)
-#define ENA_ADMIN_ACQ_COMMON_DESC_PHASE_MASK BIT(0)
+#define ENA_ADMIN_ACQ_COMMON_DESC_COMMAND_ID_MASK           GENMASK(11, 0)
+#define ENA_ADMIN_ACQ_COMMON_DESC_PHASE_MASK                BIT(0)
 
 /* aq_create_sq_cmd */
-#define ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_SHIFT 5
-#define ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_MASK GENMASK(7, 5)
-#define ENA_ADMIN_AQ_CREATE_SQ_CMD_PLACEMENT_POLICY_MASK GENMASK(3, 0)
-#define ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_SHIFT 4
-#define ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_MASK GENMASK(6, 4)
+#define ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_SHIFT       5
+#define ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_MASK        GENMASK(7, 5)
+#define ENA_ADMIN_AQ_CREATE_SQ_CMD_PLACEMENT_POLICY_MASK    GENMASK(3, 0)
+#define ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_SHIFT  4
+#define ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_MASK   GENMASK(6, 4)
 #define ENA_ADMIN_AQ_CREATE_SQ_CMD_IS_PHYSICALLY_CONTIGUOUS_MASK BIT(0)
 
 /* aq_create_cq_cmd */
@@ -1063,12 +995,12 @@ struct ena_admin_ena_mmio_req_read_less_resp {
 #define ENA_ADMIN_AQ_CREATE_CQ_CMD_CQ_ENTRY_SIZE_WORDS_MASK GENMASK(4, 0)
 
 /* get_set_feature_common_desc */
-#define ENA_ADMIN_GET_SET_FEATURE_COMMON_DESC_SELECT_MASK GENMASK(1, 0)
+#define ENA_ADMIN_GET_SET_FEATURE_COMMON_DESC_SELECT_MASK   GENMASK(1, 0)
 
 /* get_feature_link_desc */
-#define ENA_ADMIN_GET_FEATURE_LINK_DESC_AUTONEG_MASK BIT(0)
-#define ENA_ADMIN_GET_FEATURE_LINK_DESC_DUPLEX_SHIFT 1
-#define ENA_ADMIN_GET_FEATURE_LINK_DESC_DUPLEX_MASK BIT(1)
+#define ENA_ADMIN_GET_FEATURE_LINK_DESC_AUTONEG_MASK        BIT(0)
+#define ENA_ADMIN_GET_FEATURE_LINK_DESC_DUPLEX_SHIFT        1
+#define ENA_ADMIN_GET_FEATURE_LINK_DESC_DUPLEX_MASK         BIT(1)
 
 /* feature_offload_desc */
 #define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L3_CSUM_IPV4_MASK BIT(0)
@@ -1080,19 +1012,19 @@ struct ena_admin_ena_mmio_req_read_less_resp {
 #define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_PART_MASK BIT(3)
 #define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_FULL_SHIFT 4
 #define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_FULL_MASK BIT(4)
-#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_SHIFT 5
-#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_MASK BIT(5)
-#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV6_SHIFT 6
-#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV6_MASK BIT(6)
-#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_ECN_SHIFT 7
-#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_ECN_MASK BIT(7)
+#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_SHIFT       5
+#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_MASK        BIT(5)
+#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV6_SHIFT       6
+#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV6_MASK        BIT(6)
+#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_ECN_SHIFT        7
+#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_ECN_MASK         BIT(7)
 #define ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L3_CSUM_IPV4_MASK BIT(0)
 #define ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV4_CSUM_SHIFT 1
 #define ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV4_CSUM_MASK BIT(1)
 #define ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV6_CSUM_SHIFT 2
 #define ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV6_CSUM_MASK BIT(2)
-#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_HASH_SHIFT 3
-#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_HASH_MASK BIT(3)
+#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_HASH_SHIFT        3
+#define ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_HASH_MASK         BIT(3)
 
 /* feature_rss_flow_hash_function */
 #define ENA_ADMIN_FEATURE_RSS_FLOW_HASH_FUNCTION_FUNCS_MASK GENMASK(7, 0)
@@ -1100,32 +1032,32 @@ struct ena_admin_ena_mmio_req_read_less_resp {
 
 /* feature_rss_flow_hash_input */
 #define ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L3_SORT_SHIFT 1
-#define ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L3_SORT_MASK BIT(1)
+#define ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L3_SORT_MASK  BIT(1)
 #define ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L4_SORT_SHIFT 2
-#define ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L4_SORT_MASK BIT(2)
+#define ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L4_SORT_MASK  BIT(2)
 #define ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_ENABLE_L3_SORT_SHIFT 1
 #define ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_ENABLE_L3_SORT_MASK BIT(1)
 #define ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_ENABLE_L4_SORT_SHIFT 2
 #define ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_ENABLE_L4_SORT_MASK BIT(2)
 
 /* host_info */
-#define ENA_ADMIN_HOST_INFO_MAJOR_MASK GENMASK(7, 0)
-#define ENA_ADMIN_HOST_INFO_MINOR_SHIFT 8
-#define ENA_ADMIN_HOST_INFO_MINOR_MASK GENMASK(15, 8)
-#define ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT 16
-#define ENA_ADMIN_HOST_INFO_SUB_MINOR_MASK GENMASK(23, 16)
-#define ENA_ADMIN_HOST_INFO_MODULE_TYPE_SHIFT 24
-#define ENA_ADMIN_HOST_INFO_MODULE_TYPE_MASK GENMASK(31, 24)
-#define ENA_ADMIN_HOST_INFO_FUNCTION_MASK GENMASK(2, 0)
-#define ENA_ADMIN_HOST_INFO_DEVICE_SHIFT 3
-#define ENA_ADMIN_HOST_INFO_DEVICE_MASK GENMASK(7, 3)
-#define ENA_ADMIN_HOST_INFO_BUS_SHIFT 8
-#define ENA_ADMIN_HOST_INFO_BUS_MASK GENMASK(15, 8)
+#define ENA_ADMIN_HOST_INFO_MAJOR_MASK                      GENMASK(7, 0)
+#define ENA_ADMIN_HOST_INFO_MINOR_SHIFT                     8
+#define ENA_ADMIN_HOST_INFO_MINOR_MASK                      GENMASK(15, 8)
+#define ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT                 16
+#define ENA_ADMIN_HOST_INFO_SUB_MINOR_MASK                  GENMASK(23, 16)
+#define ENA_ADMIN_HOST_INFO_MODULE_TYPE_SHIFT               24
+#define ENA_ADMIN_HOST_INFO_MODULE_TYPE_MASK                GENMASK(31, 24)
+#define ENA_ADMIN_HOST_INFO_FUNCTION_MASK                   GENMASK(2, 0)
+#define ENA_ADMIN_HOST_INFO_DEVICE_SHIFT                    3
+#define ENA_ADMIN_HOST_INFO_DEVICE_MASK                     GENMASK(7, 3)
+#define ENA_ADMIN_HOST_INFO_BUS_SHIFT                       8
+#define ENA_ADMIN_HOST_INFO_BUS_MASK                        GENMASK(15, 8)
 
 /* aenq_common_desc */
-#define ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK BIT(0)
+#define ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK               BIT(0)
 
 /* aenq_link_change_desc */
-#define ENA_ADMIN_AENQ_LINK_CHANGE_DESC_LINK_STATUS_MASK BIT(0)
+#define ENA_ADMIN_AENQ_LINK_CHANGE_DESC_LINK_STATUS_MASK    BIT(0)
 
 #endif /*_ENA_ADMIN_H_ */
diff --git a/drivers/net/ethernet/amazon/ena/ena_eth_io_defs.h b/drivers/net/ethernet/amazon/ena/ena_eth_io_defs.h
index 4c5ccaa13c42..00e0f056a741 100644
--- a/drivers/net/ethernet/amazon/ena/ena_eth_io_defs.h
+++ b/drivers/net/ethernet/amazon/ena/ena_eth_io_defs.h
@@ -33,25 +33,18 @@
 #define _ENA_ETH_IO_H_
 
 enum ena_eth_io_l3_proto_index {
-	ENA_ETH_IO_L3_PROTO_UNKNOWN	= 0,
-
-	ENA_ETH_IO_L3_PROTO_IPV4	= 8,
-
-	ENA_ETH_IO_L3_PROTO_IPV6	= 11,
-
-	ENA_ETH_IO_L3_PROTO_FCOE	= 21,
-
-	ENA_ETH_IO_L3_PROTO_ROCE	= 22,
+	ENA_ETH_IO_L3_PROTO_UNKNOWN                 = 0,
+	ENA_ETH_IO_L3_PROTO_IPV4                    = 8,
+	ENA_ETH_IO_L3_PROTO_IPV6                    = 11,
+	ENA_ETH_IO_L3_PROTO_FCOE                    = 21,
+	ENA_ETH_IO_L3_PROTO_ROCE                    = 22,
 };
 
 enum ena_eth_io_l4_proto_index {
-	ENA_ETH_IO_L4_PROTO_UNKNOWN		= 0,
-
-	ENA_ETH_IO_L4_PROTO_TCP			= 12,
-
-	ENA_ETH_IO_L4_PROTO_UDP			= 13,
-
-	ENA_ETH_IO_L4_PROTO_ROUTEABLE_ROCE	= 23,
+	ENA_ETH_IO_L4_PROTO_UNKNOWN                 = 0,
+	ENA_ETH_IO_L4_PROTO_TCP                     = 12,
+	ENA_ETH_IO_L4_PROTO_UDP                     = 13,
+	ENA_ETH_IO_L4_PROTO_ROUTEABLE_ROCE          = 23,
 };
 
 struct ena_eth_io_tx_desc {
@@ -307,116 +300,116 @@ struct ena_eth_io_numa_node_cfg_reg {
 };
 
 /* tx_desc */
-#define ENA_ETH_IO_TX_DESC_LENGTH_MASK GENMASK(15, 0)
-#define ENA_ETH_IO_TX_DESC_REQ_ID_HI_SHIFT 16
-#define ENA_ETH_IO_TX_DESC_REQ_ID_HI_MASK GENMASK(21, 16)
-#define ENA_ETH_IO_TX_DESC_META_DESC_SHIFT 23
-#define ENA_ETH_IO_TX_DESC_META_DESC_MASK BIT(23)
-#define ENA_ETH_IO_TX_DESC_PHASE_SHIFT 24
-#define ENA_ETH_IO_TX_DESC_PHASE_MASK BIT(24)
-#define ENA_ETH_IO_TX_DESC_FIRST_SHIFT 26
-#define ENA_ETH_IO_TX_DESC_FIRST_MASK BIT(26)
-#define ENA_ETH_IO_TX_DESC_LAST_SHIFT 27
-#define ENA_ETH_IO_TX_DESC_LAST_MASK BIT(27)
-#define ENA_ETH_IO_TX_DESC_COMP_REQ_SHIFT 28
-#define ENA_ETH_IO_TX_DESC_COMP_REQ_MASK BIT(28)
-#define ENA_ETH_IO_TX_DESC_L3_PROTO_IDX_MASK GENMASK(3, 0)
-#define ENA_ETH_IO_TX_DESC_DF_SHIFT 4
-#define ENA_ETH_IO_TX_DESC_DF_MASK BIT(4)
-#define ENA_ETH_IO_TX_DESC_TSO_EN_SHIFT 7
-#define ENA_ETH_IO_TX_DESC_TSO_EN_MASK BIT(7)
-#define ENA_ETH_IO_TX_DESC_L4_PROTO_IDX_SHIFT 8
-#define ENA_ETH_IO_TX_DESC_L4_PROTO_IDX_MASK GENMASK(12, 8)
-#define ENA_ETH_IO_TX_DESC_L3_CSUM_EN_SHIFT 13
-#define ENA_ETH_IO_TX_DESC_L3_CSUM_EN_MASK BIT(13)
-#define ENA_ETH_IO_TX_DESC_L4_CSUM_EN_SHIFT 14
-#define ENA_ETH_IO_TX_DESC_L4_CSUM_EN_MASK BIT(14)
-#define ENA_ETH_IO_TX_DESC_ETHERNET_FCS_DIS_SHIFT 15
-#define ENA_ETH_IO_TX_DESC_ETHERNET_FCS_DIS_MASK BIT(15)
-#define ENA_ETH_IO_TX_DESC_L4_CSUM_PARTIAL_SHIFT 17
-#define ENA_ETH_IO_TX_DESC_L4_CSUM_PARTIAL_MASK BIT(17)
-#define ENA_ETH_IO_TX_DESC_REQ_ID_LO_SHIFT 22
-#define ENA_ETH_IO_TX_DESC_REQ_ID_LO_MASK GENMASK(31, 22)
-#define ENA_ETH_IO_TX_DESC_ADDR_HI_MASK GENMASK(15, 0)
-#define ENA_ETH_IO_TX_DESC_HEADER_LENGTH_SHIFT 24
-#define ENA_ETH_IO_TX_DESC_HEADER_LENGTH_MASK GENMASK(31, 24)
+#define ENA_ETH_IO_TX_DESC_LENGTH_MASK                      GENMASK(15, 0)
+#define ENA_ETH_IO_TX_DESC_REQ_ID_HI_SHIFT                  16
+#define ENA_ETH_IO_TX_DESC_REQ_ID_HI_MASK                   GENMASK(21, 16)
+#define ENA_ETH_IO_TX_DESC_META_DESC_SHIFT                  23
+#define ENA_ETH_IO_TX_DESC_META_DESC_MASK                   BIT(23)
+#define ENA_ETH_IO_TX_DESC_PHASE_SHIFT                      24
+#define ENA_ETH_IO_TX_DESC_PHASE_MASK                       BIT(24)
+#define ENA_ETH_IO_TX_DESC_FIRST_SHIFT                      26
+#define ENA_ETH_IO_TX_DESC_FIRST_MASK                       BIT(26)
+#define ENA_ETH_IO_TX_DESC_LAST_SHIFT                       27
+#define ENA_ETH_IO_TX_DESC_LAST_MASK                        BIT(27)
+#define ENA_ETH_IO_TX_DESC_COMP_REQ_SHIFT                   28
+#define ENA_ETH_IO_TX_DESC_COMP_REQ_MASK                    BIT(28)
+#define ENA_ETH_IO_TX_DESC_L3_PROTO_IDX_MASK                GENMASK(3, 0)
+#define ENA_ETH_IO_TX_DESC_DF_SHIFT                         4
+#define ENA_ETH_IO_TX_DESC_DF_MASK                          BIT(4)
+#define ENA_ETH_IO_TX_DESC_TSO_EN_SHIFT                     7
+#define ENA_ETH_IO_TX_DESC_TSO_EN_MASK                      BIT(7)
+#define ENA_ETH_IO_TX_DESC_L4_PROTO_IDX_SHIFT               8
+#define ENA_ETH_IO_TX_DESC_L4_PROTO_IDX_MASK                GENMASK(12, 8)
+#define ENA_ETH_IO_TX_DESC_L3_CSUM_EN_SHIFT                 13
+#define ENA_ETH_IO_TX_DESC_L3_CSUM_EN_MASK                  BIT(13)
+#define ENA_ETH_IO_TX_DESC_L4_CSUM_EN_SHIFT                 14
+#define ENA_ETH_IO_TX_DESC_L4_CSUM_EN_MASK                  BIT(14)
+#define ENA_ETH_IO_TX_DESC_ETHERNET_FCS_DIS_SHIFT           15
+#define ENA_ETH_IO_TX_DESC_ETHERNET_FCS_DIS_MASK            BIT(15)
+#define ENA_ETH_IO_TX_DESC_L4_CSUM_PARTIAL_SHIFT            17
+#define ENA_ETH_IO_TX_DESC_L4_CSUM_PARTIAL_MASK             BIT(17)
+#define ENA_ETH_IO_TX_DESC_REQ_ID_LO_SHIFT                  22
+#define ENA_ETH_IO_TX_DESC_REQ_ID_LO_MASK                   GENMASK(31, 22)
+#define ENA_ETH_IO_TX_DESC_ADDR_HI_MASK                     GENMASK(15, 0)
+#define ENA_ETH_IO_TX_DESC_HEADER_LENGTH_SHIFT              24
+#define ENA_ETH_IO_TX_DESC_HEADER_LENGTH_MASK               GENMASK(31, 24)
 
 /* tx_meta_desc */
-#define ENA_ETH_IO_TX_META_DESC_REQ_ID_LO_MASK GENMASK(9, 0)
-#define ENA_ETH_IO_TX_META_DESC_EXT_VALID_SHIFT 14
-#define ENA_ETH_IO_TX_META_DESC_EXT_VALID_MASK BIT(14)
-#define ENA_ETH_IO_TX_META_DESC_MSS_HI_SHIFT 16
-#define ENA_ETH_IO_TX_META_DESC_MSS_HI_MASK GENMASK(19, 16)
-#define ENA_ETH_IO_TX_META_DESC_ETH_META_TYPE_SHIFT 20
-#define ENA_ETH_IO_TX_META_DESC_ETH_META_TYPE_MASK BIT(20)
-#define ENA_ETH_IO_TX_META_DESC_META_STORE_SHIFT 21
-#define ENA_ETH_IO_TX_META_DESC_META_STORE_MASK BIT(21)
-#define ENA_ETH_IO_TX_META_DESC_META_DESC_SHIFT 23
-#define ENA_ETH_IO_TX_META_DESC_META_DESC_MASK BIT(23)
-#define ENA_ETH_IO_TX_META_DESC_PHASE_SHIFT 24
-#define ENA_ETH_IO_TX_META_DESC_PHASE_MASK BIT(24)
-#define ENA_ETH_IO_TX_META_DESC_FIRST_SHIFT 26
-#define ENA_ETH_IO_TX_META_DESC_FIRST_MASK BIT(26)
-#define ENA_ETH_IO_TX_META_DESC_LAST_SHIFT 27
-#define ENA_ETH_IO_TX_META_DESC_LAST_MASK BIT(27)
-#define ENA_ETH_IO_TX_META_DESC_COMP_REQ_SHIFT 28
-#define ENA_ETH_IO_TX_META_DESC_COMP_REQ_MASK BIT(28)
-#define ENA_ETH_IO_TX_META_DESC_REQ_ID_HI_MASK GENMASK(5, 0)
-#define ENA_ETH_IO_TX_META_DESC_L3_HDR_LEN_MASK GENMASK(7, 0)
-#define ENA_ETH_IO_TX_META_DESC_L3_HDR_OFF_SHIFT 8
-#define ENA_ETH_IO_TX_META_DESC_L3_HDR_OFF_MASK GENMASK(15, 8)
-#define ENA_ETH_IO_TX_META_DESC_L4_HDR_LEN_IN_WORDS_SHIFT 16
-#define ENA_ETH_IO_TX_META_DESC_L4_HDR_LEN_IN_WORDS_MASK GENMASK(21, 16)
-#define ENA_ETH_IO_TX_META_DESC_MSS_LO_SHIFT 22
-#define ENA_ETH_IO_TX_META_DESC_MSS_LO_MASK GENMASK(31, 22)
+#define ENA_ETH_IO_TX_META_DESC_REQ_ID_LO_MASK              GENMASK(9, 0)
+#define ENA_ETH_IO_TX_META_DESC_EXT_VALID_SHIFT             14
+#define ENA_ETH_IO_TX_META_DESC_EXT_VALID_MASK              BIT(14)
+#define ENA_ETH_IO_TX_META_DESC_MSS_HI_SHIFT                16
+#define ENA_ETH_IO_TX_META_DESC_MSS_HI_MASK                 GENMASK(19, 16)
+#define ENA_ETH_IO_TX_META_DESC_ETH_META_TYPE_SHIFT         20
+#define ENA_ETH_IO_TX_META_DESC_ETH_META_TYPE_MASK          BIT(20)
+#define ENA_ETH_IO_TX_META_DESC_META_STORE_SHIFT            21
+#define ENA_ETH_IO_TX_META_DESC_META_STORE_MASK             BIT(21)
+#define ENA_ETH_IO_TX_META_DESC_META_DESC_SHIFT             23
+#define ENA_ETH_IO_TX_META_DESC_META_DESC_MASK              BIT(23)
+#define ENA_ETH_IO_TX_META_DESC_PHASE_SHIFT                 24
+#define ENA_ETH_IO_TX_META_DESC_PHASE_MASK                  BIT(24)
+#define ENA_ETH_IO_TX_META_DESC_FIRST_SHIFT                 26
+#define ENA_ETH_IO_TX_META_DESC_FIRST_MASK                  BIT(26)
+#define ENA_ETH_IO_TX_META_DESC_LAST_SHIFT                  27
+#define ENA_ETH_IO_TX_META_DESC_LAST_MASK                   BIT(27)
+#define ENA_ETH_IO_TX_META_DESC_COMP_REQ_SHIFT              28
+#define ENA_ETH_IO_TX_META_DESC_COMP_REQ_MASK               BIT(28)
+#define ENA_ETH_IO_TX_META_DESC_REQ_ID_HI_MASK              GENMASK(5, 0)
+#define ENA_ETH_IO_TX_META_DESC_L3_HDR_LEN_MASK             GENMASK(7, 0)
+#define ENA_ETH_IO_TX_META_DESC_L3_HDR_OFF_SHIFT            8
+#define ENA_ETH_IO_TX_META_DESC_L3_HDR_OFF_MASK             GENMASK(15, 8)
+#define ENA_ETH_IO_TX_META_DESC_L4_HDR_LEN_IN_WORDS_SHIFT   16
+#define ENA_ETH_IO_TX_META_DESC_L4_HDR_LEN_IN_WORDS_MASK    GENMASK(21, 16)
+#define ENA_ETH_IO_TX_META_DESC_MSS_LO_SHIFT                22
+#define ENA_ETH_IO_TX_META_DESC_MSS_LO_MASK                 GENMASK(31, 22)
 
 /* tx_cdesc */
-#define ENA_ETH_IO_TX_CDESC_PHASE_MASK BIT(0)
+#define ENA_ETH_IO_TX_CDESC_PHASE_MASK                      BIT(0)
 
 /* rx_desc */
-#define ENA_ETH_IO_RX_DESC_PHASE_MASK BIT(0)
-#define ENA_ETH_IO_RX_DESC_FIRST_SHIFT 2
-#define ENA_ETH_IO_RX_DESC_FIRST_MASK BIT(2)
-#define ENA_ETH_IO_RX_DESC_LAST_SHIFT 3
-#define ENA_ETH_IO_RX_DESC_LAST_MASK BIT(3)
-#define ENA_ETH_IO_RX_DESC_COMP_REQ_SHIFT 4
-#define ENA_ETH_IO_RX_DESC_COMP_REQ_MASK BIT(4)
+#define ENA_ETH_IO_RX_DESC_PHASE_MASK                       BIT(0)
+#define ENA_ETH_IO_RX_DESC_FIRST_SHIFT                      2
+#define ENA_ETH_IO_RX_DESC_FIRST_MASK                       BIT(2)
+#define ENA_ETH_IO_RX_DESC_LAST_SHIFT                       3
+#define ENA_ETH_IO_RX_DESC_LAST_MASK                        BIT(3)
+#define ENA_ETH_IO_RX_DESC_COMP_REQ_SHIFT                   4
+#define ENA_ETH_IO_RX_DESC_COMP_REQ_MASK                    BIT(4)
 
 /* rx_cdesc_base */
-#define ENA_ETH_IO_RX_CDESC_BASE_L3_PROTO_IDX_MASK GENMASK(4, 0)
-#define ENA_ETH_IO_RX_CDESC_BASE_SRC_VLAN_CNT_SHIFT 5
-#define ENA_ETH_IO_RX_CDESC_BASE_SRC_VLAN_CNT_MASK GENMASK(6, 5)
-#define ENA_ETH_IO_RX_CDESC_BASE_L4_PROTO_IDX_SHIFT 8
-#define ENA_ETH_IO_RX_CDESC_BASE_L4_PROTO_IDX_MASK GENMASK(12, 8)
-#define ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM_ERR_SHIFT 13
-#define ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM_ERR_MASK BIT(13)
-#define ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_SHIFT 14
-#define ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_MASK BIT(14)
-#define ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_SHIFT 15
-#define ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_MASK BIT(15)
-#define ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_SHIFT 16
-#define ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_MASK BIT(16)
-#define ENA_ETH_IO_RX_CDESC_BASE_PHASE_SHIFT 24
-#define ENA_ETH_IO_RX_CDESC_BASE_PHASE_MASK BIT(24)
-#define ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM2_SHIFT 25
-#define ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM2_MASK BIT(25)
-#define ENA_ETH_IO_RX_CDESC_BASE_FIRST_SHIFT 26
-#define ENA_ETH_IO_RX_CDESC_BASE_FIRST_MASK BIT(26)
-#define ENA_ETH_IO_RX_CDESC_BASE_LAST_SHIFT 27
-#define ENA_ETH_IO_RX_CDESC_BASE_LAST_MASK BIT(27)
-#define ENA_ETH_IO_RX_CDESC_BASE_BUFFER_SHIFT 30
-#define ENA_ETH_IO_RX_CDESC_BASE_BUFFER_MASK BIT(30)
+#define ENA_ETH_IO_RX_CDESC_BASE_L3_PROTO_IDX_MASK          GENMASK(4, 0)
+#define ENA_ETH_IO_RX_CDESC_BASE_SRC_VLAN_CNT_SHIFT         5
+#define ENA_ETH_IO_RX_CDESC_BASE_SRC_VLAN_CNT_MASK          GENMASK(6, 5)
+#define ENA_ETH_IO_RX_CDESC_BASE_L4_PROTO_IDX_SHIFT         8
+#define ENA_ETH_IO_RX_CDESC_BASE_L4_PROTO_IDX_MASK          GENMASK(12, 8)
+#define ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM_ERR_SHIFT          13
+#define ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM_ERR_MASK           BIT(13)
+#define ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_SHIFT          14
+#define ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_MASK           BIT(14)
+#define ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_SHIFT            15
+#define ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_MASK             BIT(15)
+#define ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_SHIFT      16
+#define ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_MASK       BIT(16)
+#define ENA_ETH_IO_RX_CDESC_BASE_PHASE_SHIFT                24
+#define ENA_ETH_IO_RX_CDESC_BASE_PHASE_MASK                 BIT(24)
+#define ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM2_SHIFT             25
+#define ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM2_MASK              BIT(25)
+#define ENA_ETH_IO_RX_CDESC_BASE_FIRST_SHIFT                26
+#define ENA_ETH_IO_RX_CDESC_BASE_FIRST_MASK                 BIT(26)
+#define ENA_ETH_IO_RX_CDESC_BASE_LAST_SHIFT                 27
+#define ENA_ETH_IO_RX_CDESC_BASE_LAST_MASK                  BIT(27)
+#define ENA_ETH_IO_RX_CDESC_BASE_BUFFER_SHIFT               30
+#define ENA_ETH_IO_RX_CDESC_BASE_BUFFER_MASK                BIT(30)
 
 /* intr_reg */
-#define ENA_ETH_IO_INTR_REG_RX_INTR_DELAY_MASK GENMASK(14, 0)
-#define ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_SHIFT 15
-#define ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_MASK GENMASK(29, 15)
-#define ENA_ETH_IO_INTR_REG_INTR_UNMASK_SHIFT 30
-#define ENA_ETH_IO_INTR_REG_INTR_UNMASK_MASK BIT(30)
+#define ENA_ETH_IO_INTR_REG_RX_INTR_DELAY_MASK              GENMASK(14, 0)
+#define ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_SHIFT             15
+#define ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_MASK              GENMASK(29, 15)
+#define ENA_ETH_IO_INTR_REG_INTR_UNMASK_SHIFT               30
+#define ENA_ETH_IO_INTR_REG_INTR_UNMASK_MASK                BIT(30)
 
 /* numa_node_cfg_reg */
-#define ENA_ETH_IO_NUMA_NODE_CFG_REG_NUMA_MASK GENMASK(7, 0)
-#define ENA_ETH_IO_NUMA_NODE_CFG_REG_ENABLED_SHIFT 31
-#define ENA_ETH_IO_NUMA_NODE_CFG_REG_ENABLED_MASK BIT(31)
+#define ENA_ETH_IO_NUMA_NODE_CFG_REG_NUMA_MASK              GENMASK(7, 0)
+#define ENA_ETH_IO_NUMA_NODE_CFG_REG_ENABLED_SHIFT          31
+#define ENA_ETH_IO_NUMA_NODE_CFG_REG_ENABLED_MASK           BIT(31)
 
 #endif /*_ENA_ETH_IO_H_ */
diff --git a/drivers/net/ethernet/amazon/ena/ena_regs_defs.h b/drivers/net/ethernet/amazon/ena/ena_regs_defs.h
index 48ca97fbe7bc..04fcafcc059c 100644
--- a/drivers/net/ethernet/amazon/ena/ena_regs_defs.h
+++ b/drivers/net/ethernet/amazon/ena/ena_regs_defs.h
@@ -33,137 +33,125 @@
 #define _ENA_REGS_H_
 
 enum ena_regs_reset_reason_types {
-	ENA_REGS_RESET_NORMAL			= 0,
-
-	ENA_REGS_RESET_KEEP_ALIVE_TO		= 1,
-
-	ENA_REGS_RESET_ADMIN_TO			= 2,
-
-	ENA_REGS_RESET_MISS_TX_CMPL		= 3,
-
-	ENA_REGS_RESET_INV_RX_REQ_ID		= 4,
-
-	ENA_REGS_RESET_INV_TX_REQ_ID		= 5,
-
-	ENA_REGS_RESET_TOO_MANY_RX_DESCS	= 6,
-
-	ENA_REGS_RESET_INIT_ERR			= 7,
-
-	ENA_REGS_RESET_DRIVER_INVALID_STATE	= 8,
-
-	ENA_REGS_RESET_OS_TRIGGER		= 9,
-
-	ENA_REGS_RESET_OS_NETDEV_WD		= 10,
-
-	ENA_REGS_RESET_SHUTDOWN			= 11,
-
-	ENA_REGS_RESET_USER_TRIGGER		= 12,
-
-	ENA_REGS_RESET_GENERIC			= 13,
-
-	ENA_REGS_RESET_MISS_INTERRUPT		= 14,
+	ENA_REGS_RESET_NORMAL                       = 0,
+	ENA_REGS_RESET_KEEP_ALIVE_TO                = 1,
+	ENA_REGS_RESET_ADMIN_TO                     = 2,
+	ENA_REGS_RESET_MISS_TX_CMPL                 = 3,
+	ENA_REGS_RESET_INV_RX_REQ_ID                = 4,
+	ENA_REGS_RESET_INV_TX_REQ_ID                = 5,
+	ENA_REGS_RESET_TOO_MANY_RX_DESCS            = 6,
+	ENA_REGS_RESET_INIT_ERR                     = 7,
+	ENA_REGS_RESET_DRIVER_INVALID_STATE         = 8,
+	ENA_REGS_RESET_OS_TRIGGER                   = 9,
+	ENA_REGS_RESET_OS_NETDEV_WD                 = 10,
+	ENA_REGS_RESET_SHUTDOWN                     = 11,
+	ENA_REGS_RESET_USER_TRIGGER                 = 12,
+	ENA_REGS_RESET_GENERIC                      = 13,
+	ENA_REGS_RESET_MISS_INTERRUPT               = 14,
 };
 
 /* ena_registers offsets */
-#define ENA_REGS_VERSION_OFF		0x0
-#define ENA_REGS_CONTROLLER_VERSION_OFF		0x4
-#define ENA_REGS_CAPS_OFF		0x8
-#define ENA_REGS_CAPS_EXT_OFF		0xc
-#define ENA_REGS_AQ_BASE_LO_OFF		0x10
-#define ENA_REGS_AQ_BASE_HI_OFF		0x14
-#define ENA_REGS_AQ_CAPS_OFF		0x18
-#define ENA_REGS_ACQ_BASE_LO_OFF		0x20
-#define ENA_REGS_ACQ_BASE_HI_OFF		0x24
-#define ENA_REGS_ACQ_CAPS_OFF		0x28
-#define ENA_REGS_AQ_DB_OFF		0x2c
-#define ENA_REGS_ACQ_TAIL_OFF		0x30
-#define ENA_REGS_AENQ_CAPS_OFF		0x34
-#define ENA_REGS_AENQ_BASE_LO_OFF		0x38
-#define ENA_REGS_AENQ_BASE_HI_OFF		0x3c
-#define ENA_REGS_AENQ_HEAD_DB_OFF		0x40
-#define ENA_REGS_AENQ_TAIL_OFF		0x44
-#define ENA_REGS_INTR_MASK_OFF		0x4c
-#define ENA_REGS_DEV_CTL_OFF		0x54
-#define ENA_REGS_DEV_STS_OFF		0x58
-#define ENA_REGS_MMIO_REG_READ_OFF		0x5c
-#define ENA_REGS_MMIO_RESP_LO_OFF		0x60
-#define ENA_REGS_MMIO_RESP_HI_OFF		0x64
-#define ENA_REGS_RSS_IND_ENTRY_UPDATE_OFF		0x68
+
+/* 0 base */
+#define ENA_REGS_VERSION_OFF                                0x0
+#define ENA_REGS_CONTROLLER_VERSION_OFF                     0x4
+#define ENA_REGS_CAPS_OFF                                   0x8
+#define ENA_REGS_CAPS_EXT_OFF                               0xc
+#define ENA_REGS_AQ_BASE_LO_OFF                             0x10
+#define ENA_REGS_AQ_BASE_HI_OFF                             0x14
+#define ENA_REGS_AQ_CAPS_OFF                                0x18
+#define ENA_REGS_ACQ_BASE_LO_OFF                            0x20
+#define ENA_REGS_ACQ_BASE_HI_OFF                            0x24
+#define ENA_REGS_ACQ_CAPS_OFF                               0x28
+#define ENA_REGS_AQ_DB_OFF                                  0x2c
+#define ENA_REGS_ACQ_TAIL_OFF                               0x30
+#define ENA_REGS_AENQ_CAPS_OFF                              0x34
+#define ENA_REGS_AENQ_BASE_LO_OFF                           0x38
+#define ENA_REGS_AENQ_BASE_HI_OFF                           0x3c
+#define ENA_REGS_AENQ_HEAD_DB_OFF                           0x40
+#define ENA_REGS_AENQ_TAIL_OFF                              0x44
+#define ENA_REGS_INTR_MASK_OFF                              0x4c
+#define ENA_REGS_DEV_CTL_OFF                                0x54
+#define ENA_REGS_DEV_STS_OFF                                0x58
+#define ENA_REGS_MMIO_REG_READ_OFF                          0x5c
+#define ENA_REGS_MMIO_RESP_LO_OFF                           0x60
+#define ENA_REGS_MMIO_RESP_HI_OFF                           0x64
+#define ENA_REGS_RSS_IND_ENTRY_UPDATE_OFF                   0x68
 
 /* version register */
-#define ENA_REGS_VERSION_MINOR_VERSION_MASK		0xff
-#define ENA_REGS_VERSION_MAJOR_VERSION_SHIFT		8
-#define ENA_REGS_VERSION_MAJOR_VERSION_MASK		0xff00
+#define ENA_REGS_VERSION_MINOR_VERSION_MASK                 0xff
+#define ENA_REGS_VERSION_MAJOR_VERSION_SHIFT                8
+#define ENA_REGS_VERSION_MAJOR_VERSION_MASK                 0xff00
 
 /* controller_version register */
-#define ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK		0xff
-#define ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT		8
-#define ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK		0xff00
-#define ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT		16
-#define ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK		0xff0000
-#define ENA_REGS_CONTROLLER_VERSION_IMPL_ID_SHIFT		24
-#define ENA_REGS_CONTROLLER_VERSION_IMPL_ID_MASK		0xff000000
+#define ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK   0xff
+#define ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT     8
+#define ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK      0xff00
+#define ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT     16
+#define ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK      0xff0000
+#define ENA_REGS_CONTROLLER_VERSION_IMPL_ID_SHIFT           24
+#define ENA_REGS_CONTROLLER_VERSION_IMPL_ID_MASK            0xff000000
 
 /* caps register */
-#define ENA_REGS_CAPS_CONTIGUOUS_QUEUE_REQUIRED_MASK		0x1
-#define ENA_REGS_CAPS_RESET_TIMEOUT_SHIFT		1
-#define ENA_REGS_CAPS_RESET_TIMEOUT_MASK		0x3e
-#define ENA_REGS_CAPS_DMA_ADDR_WIDTH_SHIFT		8
-#define ENA_REGS_CAPS_DMA_ADDR_WIDTH_MASK		0xff00
-#define ENA_REGS_CAPS_ADMIN_CMD_TO_SHIFT		16
-#define ENA_REGS_CAPS_ADMIN_CMD_TO_MASK		0xf0000
+#define ENA_REGS_CAPS_CONTIGUOUS_QUEUE_REQUIRED_MASK        0x1
+#define ENA_REGS_CAPS_RESET_TIMEOUT_SHIFT                   1
+#define ENA_REGS_CAPS_RESET_TIMEOUT_MASK                    0x3e
+#define ENA_REGS_CAPS_DMA_ADDR_WIDTH_SHIFT                  8
+#define ENA_REGS_CAPS_DMA_ADDR_WIDTH_MASK                   0xff00
+#define ENA_REGS_CAPS_ADMIN_CMD_TO_SHIFT                    16
+#define ENA_REGS_CAPS_ADMIN_CMD_TO_MASK                     0xf0000
 
 /* aq_caps register */
-#define ENA_REGS_AQ_CAPS_AQ_DEPTH_MASK		0xffff
-#define ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_SHIFT		16
-#define ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_MASK		0xffff0000
+#define ENA_REGS_AQ_CAPS_AQ_DEPTH_MASK                      0xffff
+#define ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_SHIFT                16
+#define ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_MASK                 0xffff0000
 
 /* acq_caps register */
-#define ENA_REGS_ACQ_CAPS_ACQ_DEPTH_MASK		0xffff
-#define ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_SHIFT		16
-#define ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_MASK		0xffff0000
+#define ENA_REGS_ACQ_CAPS_ACQ_DEPTH_MASK                    0xffff
+#define ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_SHIFT              16
+#define ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_MASK               0xffff0000
 
 /* aenq_caps register */
-#define ENA_REGS_AENQ_CAPS_AENQ_DEPTH_MASK		0xffff
-#define ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_SHIFT		16
-#define ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_MASK		0xffff0000
+#define ENA_REGS_AENQ_CAPS_AENQ_DEPTH_MASK                  0xffff
+#define ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_SHIFT            16
+#define ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_MASK             0xffff0000
 
 /* dev_ctl register */
-#define ENA_REGS_DEV_CTL_DEV_RESET_MASK		0x1
-#define ENA_REGS_DEV_CTL_AQ_RESTART_SHIFT		1
-#define ENA_REGS_DEV_CTL_AQ_RESTART_MASK		0x2
-#define ENA_REGS_DEV_CTL_QUIESCENT_SHIFT		2
-#define ENA_REGS_DEV_CTL_QUIESCENT_MASK		0x4
-#define ENA_REGS_DEV_CTL_IO_RESUME_SHIFT		3
-#define ENA_REGS_DEV_CTL_IO_RESUME_MASK		0x8
-#define ENA_REGS_DEV_CTL_RESET_REASON_SHIFT		28
-#define ENA_REGS_DEV_CTL_RESET_REASON_MASK		0xf0000000
+#define ENA_REGS_DEV_CTL_DEV_RESET_MASK                     0x1
+#define ENA_REGS_DEV_CTL_AQ_RESTART_SHIFT                   1
+#define ENA_REGS_DEV_CTL_AQ_RESTART_MASK                    0x2
+#define ENA_REGS_DEV_CTL_QUIESCENT_SHIFT                    2
+#define ENA_REGS_DEV_CTL_QUIESCENT_MASK                     0x4
+#define ENA_REGS_DEV_CTL_IO_RESUME_SHIFT                    3
+#define ENA_REGS_DEV_CTL_IO_RESUME_MASK                     0x8
+#define ENA_REGS_DEV_CTL_RESET_REASON_SHIFT                 28
+#define ENA_REGS_DEV_CTL_RESET_REASON_MASK                  0xf0000000
 
 /* dev_sts register */
-#define ENA_REGS_DEV_STS_READY_MASK		0x1
-#define ENA_REGS_DEV_STS_AQ_RESTART_IN_PROGRESS_SHIFT		1
-#define ENA_REGS_DEV_STS_AQ_RESTART_IN_PROGRESS_MASK		0x2
-#define ENA_REGS_DEV_STS_AQ_RESTART_FINISHED_SHIFT		2
-#define ENA_REGS_DEV_STS_AQ_RESTART_FINISHED_MASK		0x4
-#define ENA_REGS_DEV_STS_RESET_IN_PROGRESS_SHIFT		3
-#define ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK		0x8
-#define ENA_REGS_DEV_STS_RESET_FINISHED_SHIFT		4
-#define ENA_REGS_DEV_STS_RESET_FINISHED_MASK		0x10
-#define ENA_REGS_DEV_STS_FATAL_ERROR_SHIFT		5
-#define ENA_REGS_DEV_STS_FATAL_ERROR_MASK		0x20
-#define ENA_REGS_DEV_STS_QUIESCENT_STATE_IN_PROGRESS_SHIFT		6
-#define ENA_REGS_DEV_STS_QUIESCENT_STATE_IN_PROGRESS_MASK		0x40
-#define ENA_REGS_DEV_STS_QUIESCENT_STATE_ACHIEVED_SHIFT		7
-#define ENA_REGS_DEV_STS_QUIESCENT_STATE_ACHIEVED_MASK		0x80
+#define ENA_REGS_DEV_STS_READY_MASK                         0x1
+#define ENA_REGS_DEV_STS_AQ_RESTART_IN_PROGRESS_SHIFT       1
+#define ENA_REGS_DEV_STS_AQ_RESTART_IN_PROGRESS_MASK        0x2
+#define ENA_REGS_DEV_STS_AQ_RESTART_FINISHED_SHIFT          2
+#define ENA_REGS_DEV_STS_AQ_RESTART_FINISHED_MASK           0x4
+#define ENA_REGS_DEV_STS_RESET_IN_PROGRESS_SHIFT            3
+#define ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK             0x8
+#define ENA_REGS_DEV_STS_RESET_FINISHED_SHIFT               4
+#define ENA_REGS_DEV_STS_RESET_FINISHED_MASK                0x10
+#define ENA_REGS_DEV_STS_FATAL_ERROR_SHIFT                  5
+#define ENA_REGS_DEV_STS_FATAL_ERROR_MASK                   0x20
+#define ENA_REGS_DEV_STS_QUIESCENT_STATE_IN_PROGRESS_SHIFT  6
+#define ENA_REGS_DEV_STS_QUIESCENT_STATE_IN_PROGRESS_MASK   0x40
+#define ENA_REGS_DEV_STS_QUIESCENT_STATE_ACHIEVED_SHIFT     7
+#define ENA_REGS_DEV_STS_QUIESCENT_STATE_ACHIEVED_MASK      0x80
 
 /* mmio_reg_read register */
-#define ENA_REGS_MMIO_REG_READ_REQ_ID_MASK		0xffff
-#define ENA_REGS_MMIO_REG_READ_REG_OFF_SHIFT		16
-#define ENA_REGS_MMIO_REG_READ_REG_OFF_MASK		0xffff0000
+#define ENA_REGS_MMIO_REG_READ_REQ_ID_MASK                  0xffff
+#define ENA_REGS_MMIO_REG_READ_REG_OFF_SHIFT                16
+#define ENA_REGS_MMIO_REG_READ_REG_OFF_MASK                 0xffff0000
 
 /* rss_ind_entry_update register */
-#define ENA_REGS_RSS_IND_ENTRY_UPDATE_INDEX_MASK		0xffff
-#define ENA_REGS_RSS_IND_ENTRY_UPDATE_CQ_IDX_SHIFT		16
-#define ENA_REGS_RSS_IND_ENTRY_UPDATE_CQ_IDX_MASK		0xffff0000
+#define ENA_REGS_RSS_IND_ENTRY_UPDATE_INDEX_MASK            0xffff
+#define ENA_REGS_RSS_IND_ENTRY_UPDATE_CQ_IDX_SHIFT          16
+#define ENA_REGS_RSS_IND_ENTRY_UPDATE_CQ_IDX_MASK           0xffff0000
 
 #endif /*_ENA_REGS_H_ */
-- 
2.19.1

From 6c2e2e6731d872a227226140780c8ecd9712bf4e Mon Sep 17 00:00:00 2001
From: Netanel Belgazal <netanel@amazon.com>
Date: Wed, 17 Oct 2018 10:04:21 +0000
Subject: [PATCH 14/16] net: ena: Fix Kconfig dependency on X86

The Kconfig limitation of X86 is to too wide.
The ENA driver only requires a little endian dependency.

Change the dependency to be on little endian CPU.

Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amazon/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/amazon/Kconfig b/drivers/net/ethernet/amazon/Kconfig
index 99b30353541a..9e87d7b8360f 100644
--- a/drivers/net/ethernet/amazon/Kconfig
+++ b/drivers/net/ethernet/amazon/Kconfig
@@ -17,7 +17,7 @@ if NET_VENDOR_AMAZON
 
 config ENA_ETHERNET
 	tristate "Elastic Network Adapter (ENA) support"
-	depends on (PCI_MSI && X86)
+	depends on PCI_MSI && !CPU_BIG_ENDIAN
 	---help---
 	  This driver supports Elastic Network Adapter (ENA)"
 
-- 
2.19.1

From 628f8c52965bb8734f76bbeb2b24b20bc48d2180 Mon Sep 17 00:00:00 2001
From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Wed, 17 Oct 2018 15:33:23 +0300
Subject: [PATCH 15/16] net: ena: enable Low Latency Queues

Use the new API to enable usage of LLQ.

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 284a0a612131..18956e7604a3 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -3022,20 +3022,10 @@ static int ena_calc_io_queue_num(struct pci_dev *pdev,
 	int io_sq_num, io_queue_num;
 
 	/* In case of LLQ use the llq number in the get feature cmd */
-	if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
-		io_sq_num = get_feat_ctx->max_queues.max_legacy_llq_num;
-
-		if (io_sq_num == 0) {
-			dev_err(&pdev->dev,
-				"Trying to use LLQ but llq_num is 0. Fall back into regular queues\n");
-
-			ena_dev->tx_mem_queue_type =
-				ENA_ADMIN_PLACEMENT_POLICY_HOST;
-			io_sq_num = get_feat_ctx->max_queues.max_sq_num;
-		}
-	} else {
+	if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
+		io_sq_num = get_feat_ctx->llq.max_llq_num;
+	else
 		io_sq_num = get_feat_ctx->max_queues.max_sq_num;
-	}
 
 	io_queue_num = min_t(int, num_online_cpus(), ENA_MAX_NUM_IO_QUEUES);
 	io_queue_num = min_t(int, io_queue_num, io_sq_num);
@@ -3238,7 +3228,7 @@ static int ena_calc_queue_size(struct pci_dev *pdev,
 
 	if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
 		queue_size = min_t(u32, queue_size,
-				   get_feat_ctx->max_queues.max_legacy_llq_depth);
+				   get_feat_ctx->llq.max_llq_depth);
 
 	queue_size = rounddown_pow_of_two(queue_size);
 
-- 
2.19.1

From 3d31772392bcd5c9fc8a493df6c9f58ca6930e50 Mon Sep 17 00:00:00 2001
From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Sun, 21 Oct 2018 18:07:14 +0300
Subject: [PATCH 16/16] net: ena: fix compilation error in xtensa architecture

linux/prefetch.h is never explicitly included in ena_com, although
functions from it, such as prefetchw(), are used throughout ena_com.
This is an inclusion bug, and we fix it here by explicitly including
linux/prefetch.h. The bug was exposed when the driver was compiled
for the xtensa architecture.

Fixes: 689b2bdaaa14 ("net: ena: add functions for handling Low Latency Queues in ena_com")
Fixes: 8c590f977638 ("ena: Fix Kconfig dependency on X86")
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amazon/ena/ena_com.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/amazon/ena/ena_com.h b/drivers/net/ethernet/amazon/ena/ena_com.h
index ae8b4857fce3..078d6f2b4f39 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.h
+++ b/drivers/net/ethernet/amazon/ena/ena_com.h
@@ -38,6 +38,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/gfp.h>
 #include <linux/io.h>
+#include <linux/prefetch.h>
 #include <linux/sched.h>
 #include <linux/sizes.h>
 #include <linux/spinlock.h>
-- 
2.19.1