ENA: Update to v2.8.0

Source: https://github.com/amzn/amzn-drivers/

Change Log:

## r2.8.0 release notes
**Notes**
* The driver is now dependent on the ptp module for loading
  See README for more details.

**New Features**
* Add support for PTP HW clock
* Add support for SRD metrics
  Feature's enablement and documentation would be in future release

**Bug Fixes**
* Fix potential sign extension issue
* Reduce memory footprint of some structs
* Fix updating rx_copybreak issue
* Fix xdp drops handling due to multibuf packets
* Handle ena_calc_io_queue_size() possible errors
* Destroy correct amount of xdp queues upon failure

**Minor Changes**
* Remove wide LLQ comment on supported versions
* Backport uapi/bpf.h inclusion
* Add a counter for driver's reset failures
* Take xdp packets stats into account in ena_get_stats64()
* Make queue stats code cleaner by removing if block
* Remove redundant empty line
* Remove confusing comment
* Remove flag reading code duplication
* Replace ENA local ENA_NAPI_BUDGET to global NAPI_POLL_WEIGHT
* Change default print level for netif_ prints
* Relocate skb_tx_timestamp() to improve time stamping accuracy
* Backport bpf_warn_invalid_xdp_action() change
* Fix incorrect indentation using spaces
* Driver now compiles with Linux kernel 5.19

Signed-off-by: Suraj Jitindar Singh <[email protected]>

Author: Suraj Jitindar Singh

drivers/amazon/net/ena/Makefile

@@ -6,11 +6,15 @@
 
 obj-$(CONFIG_AMAZON_ENA_ETHERNET) += ena.o
 
-ena-y := ena_netdev.o ena_ethtool.o ena_lpc.o ena_xdp.o dim.o ena_devlink.o \
-	 net_dim.o ena_com.o ena_eth_com.o
+ena-y := ena_netdev.o ena_ethtool.o ena_lpc.o ena_phc.o ena_xdp.o dim.o \
+	 ena_devlink.o net_dim.o ena_com.o ena_eth_com.o
 
 ena-$(CONFIG_SYSFS) += ena_sysfs.o
 
 ifdef TEST_AF_XDP
 	ccflags-y += -DENA_TEST_AF_XDP
 endif
+
+ifdef ENA_PHC_INCLUDE
+	ccflags-y += -DENA_PHC_INCLUDE
+endif

drivers/amazon/net/ena/ena_admin_defs.h

@@ -50,12 +50,15 @@ enum ena_admin_aq_feature_id {
 	ENA_ADMIN_AENQ_CONFIG                       = 26,
 	ENA_ADMIN_LINK_CONFIG                       = 27,
 	ENA_ADMIN_HOST_ATTR_CONFIG                  = 28,
+	ENA_ADMIN_PHC_CONFIG                        = 29,
 	ENA_ADMIN_FEATURES_OPCODE_NUM               = 32,
 };
 
 /* device capabilities */
 enum ena_admin_aq_caps_id {
 	ENA_ADMIN_ENI_STATS                         = 0,
+	/* ENA SRD customer metrics */
+	ENA_ADMIN_ENA_SRD_INFO                      = 1,
 };
 
 enum ena_admin_placement_policy_type {
@@ -104,13 +107,29 @@ enum ena_admin_get_stats_type {
 	ENA_ADMIN_GET_STATS_TYPE_EXTENDED           = 1,
 	/* extra HW stats for specific network interface */
 	ENA_ADMIN_GET_STATS_TYPE_ENI                = 2,
+	/* extra HW stats for ENA SRD */
+	ENA_ADMIN_GET_STATS_TYPE_ENA_SRD            = 3,
 };
 
 enum ena_admin_get_stats_scope {
 	ENA_ADMIN_SPECIFIC_QUEUE                    = 0,
 	ENA_ADMIN_ETH_TRAFFIC                       = 1,
 };
 
+enum ena_admin_get_phc_type {
+	ENA_ADMIN_PHC_TYPE_READLESS                 = 0,
+};
+
+/* ENA SRD configuration for ENI */
+enum ena_admin_ena_srd_flags {
+	/* Feature enabled */
+	ENA_ADMIN_ENA_SRD_ENABLED                   = BIT(0),
+	/* UDP support enabled */
+	ENA_ADMIN_ENA_SRD_UDP_ENABLED               = BIT(1),
+	/* Bypass Rx UDP ordering */
+	ENA_ADMIN_ENA_SRD_UDP_ORDERING_BYPASS_ENABLED = BIT(2),
+};
+
 struct ena_admin_aq_common_desc {
 	/* 11:0 : command_id
 	 * 15:12 : reserved12
@@ -424,6 +443,32 @@ struct ena_admin_eni_stats {
 	u64 linklocal_allowance_exceeded;
 };
 
+struct ena_admin_ena_srd_stats {
+	/* Number of packets transmitted over ENA SRD */
+	u64 ena_srd_tx_pkts;
+
+	/* Number of packets transmitted or could have been
+	 * transmitted over ENA SRD
+	 */
+	u64 ena_srd_eligible_tx_pkts;
+
+	/* Number of packets received over ENA SRD */
+	u64 ena_srd_rx_pkts;
+
+	/* Percentage of the ENA SRD resources that is in use */
+	u64 ena_srd_resource_utilization;
+};
+
+/* ENA SRD Statistics Command */
+struct ena_admin_ena_srd_info {
+	/* ENA SRD configuration bitmap. See ena_admin_ena_srd_flags for
+	 * details
+	 */
+	u64 flags;
+
+	struct ena_admin_ena_srd_stats ena_srd_stats;
+};
+
 struct ena_admin_acq_get_stats_resp {
 	struct ena_admin_acq_common_desc acq_common_desc;
 
@@ -433,6 +478,8 @@ struct ena_admin_acq_get_stats_resp {
 		struct ena_admin_basic_stats basic_stats;
 
 		struct ena_admin_eni_stats eni_stats;
+
+		struct ena_admin_ena_srd_info ena_srd_info;
 	} u;
 };
 
@@ -970,6 +1017,43 @@ struct ena_admin_queue_ext_feature_desc {
 	};
 };
 
+struct ena_admin_feature_phc_desc {
+	/* PHC type as defined in enum ena_admin_get_phc_type,
+	 * used only for GET command.
+	 */
+	u8 type;
+
+	/* Reserved - MBZ */
+	u8 reserved1[3];
+
+	/* PHC doorbell address as an offset to PCIe MMIO REG BAR,
+	 * used only for GET command.
+	 */
+	u32 doorbell_offset;
+
+	/* Max time for valid PHC retrieval, passing this threshold will
+	 * fail the get-time request and block PHC requests for
+	 * block_timeout_usec, used only for GET command.
+	 */
+	u32 expire_timeout_usec;
+
+	/* PHC requests block period, blocking starts if PHC request expired
+	 * in order to prevent floods on busy device,
+	 * used only for GET command.
+	 */
+	u32 block_timeout_usec;
+
+	/* Shared PHC physical address (ena_admin_phc_resp),
+	 * used only for SET command.
+	 */
+	struct ena_common_mem_addr output_address;
+
+	/* Shared PHC Size (ena_admin_phc_resp),
+	 * used only for SET command.
+	 */
+	u32 output_length;
+};
+
 struct ena_admin_get_feat_resp {
 	struct ena_admin_acq_common_desc acq_common_desc;
 
@@ -1000,6 +1084,8 @@ struct ena_admin_get_feat_resp {
 
 		struct ena_admin_ena_hw_hints hw_hints;
 
+		struct ena_admin_feature_phc_desc phc;
+
 		struct ena_admin_get_extra_properties_strings_desc extra_properties_strings;
 
 		struct ena_admin_get_extra_properties_flags_desc extra_properties_flags;
@@ -1036,6 +1122,9 @@ struct ena_admin_set_feat_cmd {
 
 		/* LLQ configuration */
 		struct ena_admin_feature_llq_desc llq;
+
+		/* PHC configuration */
+		struct ena_admin_feature_phc_desc phc;
 	} u;
 };
 
@@ -1114,6 +1203,16 @@ struct ena_admin_ena_mmio_req_read_less_resp {
 	u32 reg_val;
 };
 
+struct ena_admin_phc_resp {
+	u16 req_id;
+
+	u8 reserved1[6];
+
+	u64 timestamp;
+
+	u8 reserved2[48];
+};
+
 /* 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)