[dpdk-dev] [PATCH] common/cnxk: add helpers for reading runplatform

[Jerin Jacob]

On Sat, Oct 2, 2021 at 1:55 AM Tomasz Duszynski <tduszynski at marvell.com> wrote:
>
> Add helper functions that allow one to check platform
> ROC is running on. Platform type is retrieved from device
> tree attribute runplatform which is updated by EBF accordingly.
>
> Signed-off-by: Tomasz Duszynski <tduszynski at marvell.com>
> Reviewed-by: Jerin Jacob <jerinj at marvell.com>

Applied to dpdk-next-net-mrvl/for-next-net. Thanks


> ---
>  drivers/common/cnxk/roc_model.c | 53 ++++++++++++++++++++++++++++++++-
>  drivers/common/cnxk/roc_model.h | 29 ++++++++++++++++++
>  2 files changed, 81 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/common/cnxk/roc_model.c b/drivers/common/cnxk/roc_model.c
> index e5aeabe2e2..447dc6e8bc 100644
> --- a/drivers/common/cnxk/roc_model.c
> +++ b/drivers/common/cnxk/roc_model.c
> @@ -178,6 +178,55 @@ detect_invalid_config(void)
>  #endif
>  }
>
> +static uint64_t
> +env_lookup_flag(const char *name)
> +{
> +       unsigned int i;
> +       struct {
> +               const char *name;
> +               uint64_t flag;
> +       } envs[] = {
> +               {"HW_PLATFORM", ROC_ENV_HW},
> +               {"EMUL_PLATFORM", ROC_ENV_EMUL},
> +               {"ASIM_PLATFORM", ROC_ENV_ASIM},
> +       };
> +
> +       for (i = 0; i < PLT_DIM(envs); i++)
> +               if (!strncmp(envs[i].name, name, strlen(envs[i].name)))
> +                       return envs[i].flag;
> +
> +       return 0;
> +}
> +
> +static void
> +of_env_get(struct roc_model *model)
> +{
> +       const char *const path = "/proc/device-tree/soc at 0/runplatform";
> +       uint64_t flag;
> +       FILE *fp;
> +
> +       fp = fopen(path, "r");
> +       if (!fp) {
> +               plt_err("Failed to open %s", path);
> +               return;
> +       }
> +
> +       if (!fgets(model->env, sizeof(model->env), fp)) {
> +               plt_err("Failed to read %s", path);
> +               goto err;
> +       }
> +
> +       flag = env_lookup_flag(model->env);
> +       if (flag == 0) {
> +               plt_err("Unknown platform: %s", model->env);
> +               goto err;
> +       }
> +
> +       model->flag |= flag;
> +err:
> +       fclose(fp);
> +}
> +
>  int
>  roc_model_init(struct roc_model *model)
>  {
> @@ -197,8 +246,10 @@ roc_model_init(struct roc_model *model)
>         if (!populate_model(model, midr))
>                 goto err;
>
> +       of_env_get(model);
> +
>         rc = 0;
> -       plt_info("RoC Model: %s", model->name);
> +       plt_info("RoC Model: %s (%s)", model->name, model->env);
>         roc_model = model;
>  err:
>         return rc;
> diff --git a/drivers/common/cnxk/roc_model.h b/drivers/common/cnxk/roc_model.h
> index a54f435b46..3779a88bca 100644
> --- a/drivers/common/cnxk/roc_model.h
> +++ b/drivers/common/cnxk/roc_model.h
> @@ -23,10 +23,15 @@ struct roc_model {
>  #define ROC_MODEL_CN106xx_A0   BIT_ULL(20)
>  #define ROC_MODEL_CNF105xx_A0  BIT_ULL(21)
>  #define ROC_MODEL_CNF105xxN_A0 BIT_ULL(22)
> +/* Following flags describe platform code is running on */
> +#define ROC_ENV_HW   BIT_ULL(61)
> +#define ROC_ENV_EMUL BIT_ULL(62)
> +#define ROC_ENV_ASIM BIT_ULL(63)
>
>         uint64_t flag;
>  #define ROC_MODEL_STR_LEN_MAX 128
>         char name[ROC_MODEL_STR_LEN_MAX];
> +       char env[ROC_MODEL_STR_LEN_MAX];
>  } __plt_cache_aligned;
>
>  #define ROC_MODEL_CN96xx_Ax (ROC_MODEL_CN96xx_A0 | ROC_MODEL_CN96xx_B0)
> @@ -158,6 +163,30 @@ roc_model_is_cnf10kb_a0(void)
>         return roc_model->flag & ROC_MODEL_CNF105xxN_A0;
>  }
>
> +static inline bool
> +roc_env_is_hw(void)
> +{
> +       return roc_model->flag & ROC_ENV_HW;
> +}
> +
> +static inline bool
> +roc_env_is_emulator(void)
> +{
> +       return roc_model->flag & ROC_ENV_EMUL;
> +}
> +
> +static inline bool
> +roc_env_is_asim(void)
> +{
> +       return roc_model->flag & ROC_ENV_ASIM;
> +}
> +
> +static inline const char *
> +roc_env_get(void)
> +{
> +       return roc_model->env;
> +}
> +
>  int roc_model_init(struct roc_model *model);
>
>  #endif
> --
> 2.25.1
>