net: ena: introduce Low Latency Queues data structures according to ENA spec

[sfrench/cifs-2.6.git] / drivers / net / ethernet / amazon / ena / ena_com.h

diff --git a/drivers/net/ethernet/amazon/ena/ena_com.h b/drivers/net/ethernet/amazon/ena/ena_com.h
index 7b784f8a06a6608c37f2c458b8172961ceed08f3..50e6c8f6f13842b3f292813c5e9ec5740fa2294d 100644 (file)
--- 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 {