LCOV - code coverage report
Current view: top level - drivers/net/gve - gve_rss.h (source / functions) Hit Total Coverage
Test: Code coverage Lines: 0 1 0.0 %
Date: 2025-02-01 18:54:23 Functions: 0 0 -
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 0 2 0.0 %

           Branch data     Line data    Source code
       1                 :            : /* SPDX-License-Identifier: BSD-3-Clause
       2                 :            :  * Copyright (c) 2023 Google LLC
       3                 :            :  */
       4                 :            : 
       5                 :            : #include "gve_adminq.h"
       6                 :            : #include "gve_ethdev.h"
       7                 :            : 
       8                 :            : #define GVE_RSS_HASH_IPV4               BIT(0)
       9                 :            : #define GVE_RSS_HASH_TCPV4              BIT(1)
      10                 :            : #define GVE_RSS_HASH_IPV6               BIT(2)
      11                 :            : #define GVE_RSS_HASH_IPV6_EX            BIT(3)
      12                 :            : #define GVE_RSS_HASH_TCPV6              BIT(4)
      13                 :            : #define GVE_RSS_HASH_TCPV6_EX           BIT(5)
      14                 :            : #define GVE_RSS_HASH_UDPV4              BIT(6)
      15                 :            : #define GVE_RSS_HASH_UDPV6              BIT(7)
      16                 :            : #define GVE_RSS_HASH_UDPV6_EX           BIT(8)
      17                 :            : 
      18                 :            : #define GVE_RSS_OFFLOAD_DEFAULT (       \
      19                 :            :         GVE_RSS_HASH_IPV4 |             \
      20                 :            :         GVE_RSS_HASH_TCPV4 |            \
      21                 :            :         GVE_RSS_HASH_IPV6 |             \
      22                 :            :         GVE_RSS_HASH_IPV6_EX |          \
      23                 :            :         GVE_RSS_HASH_TCPV6 |            \
      24                 :            :         GVE_RSS_HASH_TCPV6_EX |         \
      25                 :            :         GVE_RSS_HASH_UDPV4 |            \
      26                 :            :         GVE_RSS_HASH_UDPV6 |            \
      27                 :            :         GVE_RSS_HASH_UDPV6_EX)
      28                 :            : 
      29                 :            : /**
      30                 :            :  * Generates default RSS redirection table based on the number of queues the
      31                 :            :  * device is configured with. This assigns hash values to queues in a
      32                 :            :  * round-robin manner.
      33                 :            :  */
      34                 :            : int
      35                 :            : gve_generate_rss_reta(struct rte_eth_dev *dev, struct gve_rss_config *config);
      36                 :            : 
      37                 :            : /**
      38                 :            :  * Initializes `gve_rss_conf`, setting the fields to default values and
      39                 :            :  * allocating memory for the RSS key and redirection table.
      40                 :            :  */
      41                 :            : int
      42                 :            : gve_init_rss_config(struct gve_rss_config *gve_rss_conf,
      43                 :            :                 uint16_t key_size, uint16_t indir_size);
      44                 :            : 
      45                 :            : /**
      46                 :            :  * Initializes `gve_rss_conf` based on the RSS configuration stored in `priv`.
      47                 :            :  */
      48                 :            : int
      49                 :            : gve_init_rss_config_from_priv(struct gve_priv *priv,
      50                 :            :         struct gve_rss_config *gve_rss_conf);
      51                 :            : 
      52                 :            : /**
      53                 :            :  * Frees RSS key and redriection table pointers stored in `gve_rss_conf`.
      54                 :            :  */
      55                 :            : void
      56                 :            : gve_free_rss_config(struct gve_rss_config *gve_rss_conf);
      57                 :            : 
      58                 :            : /**
      59                 :            :  * Updates the rss_config stored in `priv` with the contents of `config`.
      60                 :            :  */
      61                 :            : int
      62                 :            : gve_update_priv_rss_config(struct gve_priv *priv,
      63                 :            :                            struct gve_rss_config *config);
      64                 :            : 
      65                 :            : /**
      66                 :            :  * Updates the RSS key stored in `gve_rss_conf`. It is prioritized as follows:
      67                 :            :  *      1) retrieve from `rss_conf`, if non-null
      68                 :            :  *      2) retrieve from `priv`, if non-null
      69                 :            :  * If keys from both sources are unset, return -EINVAL.
      70                 :            :  */
      71                 :            : int
      72                 :            : gve_update_rss_key(struct gve_priv *priv, struct gve_rss_config *gve_rss_conf,
      73                 :            :                    struct rte_eth_rss_conf *rss_conf);
      74                 :            : 
      75                 :            : /**
      76                 :            :  * Updates the RSS hash types stored in `gve_rss_conf`. It is prioritized as
      77                 :            :  * follows:
      78                 :            :  *      1) retrieve from `rss_conf`, if set
      79                 :            :  *      2) retrieve from priv, if RSS has been configured
      80                 :            :  *      3) set default RSS offload
      81                 :            :  */
      82                 :            : int
      83                 :            : gve_update_rss_hash_types(struct gve_priv *priv,
      84                 :            :         struct gve_rss_config *gve_rss_conf, struct rte_eth_rss_conf *rss_conf);
      85                 :            : 
      86                 :            : /**
      87                 :            :  * Ensures that only supported RSS hash fields are set in `rte_rss_hf`.
      88                 :            :  */
      89                 :            : static inline int
      90                 :            : gve_validate_rss_hf(uint64_t rte_rss_hf) {
      91         [ #  # ]:          0 :         return rte_rss_hf & ~GVE_RTE_RSS_OFFLOAD_ALL;
      92                 :            : }
      93                 :            : 
      94                 :            : /**
      95                 :            :  * Converts RSS hash types from RTE values to GVE values, storing them in
      96                 :            :  * `gve_rss_conf`.
      97                 :            :  */
      98                 :            : void
      99                 :            : rte_to_gve_rss_hf(uint64_t rte_rss_hf, struct gve_rss_config *gve_rss_conf);
     100                 :            : 
     101                 :            : /**
     102                 :            :  * Converts RSS hash types from GVE values to RTE values, storing them in
     103                 :            :  * `rss_conf`.
     104                 :            :  */
     105                 :            : void
     106                 :            : gve_to_rte_rss_hf(uint16_t gve_rss_types, struct rte_eth_rss_conf *rss_conf);
     107                 :            : 

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