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common/sfc_efx/base: support getting virtio features

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Add an API to get virtio features supported by device.

Signed-off-by: Vijay Kumar Srivastava <vsrivast@xilinx.com>
Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
This commit is contained in:
Vijay Kumar Srivastava 2021-03-16 11:58:28 +03:00 committed by Ferruh Yigit
parent ce05513b08
commit 46d2b38ba9
5 changed files with 120 additions and 0 deletions
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14
drivers/common/sfc_efx/base/efx.h
View File

@ -4433,6 +4433,13 @@ typedef struct efx_virtio_vq_cfg_s {
typedef struct efx_virtio_vq_s efx_virtio_vq_t;
typedef enum efx_virtio_device_type_e {
EFX_VIRTIO_DEVICE_TYPE_RESERVED,
EFX_VIRTIO_DEVICE_TYPE_NET,
EFX_VIRTIO_DEVICE_TYPE_BLOCK,
EFX_VIRTIO_DEVICE_NTYPES
} efx_virtio_device_type_t;
LIBEFX_API
extern __checkReturn efx_rc_t
efx_virtio_init(
@ -4487,6 +4494,13 @@ efx_virtio_get_doorbell_offset(
__in efx_virtio_vq_t *evvp,
__out uint32_t *offsetp);
LIBEFX_API
extern __checkReturn efx_rc_t
efx_virtio_get_features(
__in efx_nic_t *enp,
__in efx_virtio_device_type_t type,
__out uint64_t *featuresp);
#endif /* EFSYS_OPT_VIRTIO */
#ifdef __cplusplus

2
drivers/common/sfc_efx/base/efx_impl.h
View File

@ -318,6 +318,8 @@ typedef struct efx_virtio_ops_s {
efx_virtio_vq_dyncfg_t *);
efx_rc_t (*evo_get_doorbell_offset)(efx_virtio_vq_t *,
uint32_t *);
efx_rc_t (*evo_get_features)(efx_nic_t *,
efx_virtio_device_type_t, uint64_t *);
} efx_virtio_ops_t;
#endif /* EFSYS_OPT_VIRTIO */

45
drivers/common/sfc_efx/base/efx_virtio.c
View File

@ -13,6 +13,7 @@ static const efx_virtio_ops_t __efx_virtio_rhead_ops = {
rhead_virtio_qstart, /* evo_virtio_qstart */
rhead_virtio_qstop, /* evo_virtio_qstop */
rhead_virtio_get_doorbell_offset, /* evo_get_doorbell_offset */
rhead_virtio_get_features, /* evo_get_features */
};
#endif /* EFSYS_OPT_RIVERHEAD */
@ -254,4 +255,48 @@ fail1:
return (rc);
}
__checkReturn efx_rc_t
efx_virtio_get_features(
__in efx_nic_t *enp,
__in efx_virtio_device_type_t type,
__out uint64_t *featuresp)
{
const efx_virtio_ops_t *evop = enp->en_evop;
efx_rc_t rc;
if (featuresp == NULL) {
rc = EINVAL;
goto fail1;
}
if (type >= EFX_VIRTIO_DEVICE_NTYPES) {
rc = EINVAL;
goto fail2;
}
EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_VIRTIO);
if (evop == NULL) {
rc = ENOTSUP;
goto fail3;
}
if ((rc = evop->evo_get_features(enp, type, featuresp)) != 0)
goto fail4;
return (0);
fail4:
EFSYS_PROBE(fail4);
fail3:
EFSYS_PROBE(fail3);
fail2:
EFSYS_PROBE(fail2);
fail1:
EFSYS_PROBE1(fail1, efx_rc_t, rc);
return (rc);
}
#endif /* EFSYS_OPT_VIRTIO */

7
drivers/common/sfc_efx/base/rhead_impl.h
View File

@ -498,6 +498,13 @@ rhead_virtio_get_doorbell_offset(
__in efx_virtio_vq_t *evvp,
__out uint32_t *offsetp);
LIBEFX_INTERNAL
extern __checkReturn efx_rc_t
rhead_virtio_get_features(
__in efx_nic_t *enp,
__in efx_virtio_device_type_t type,
__out uint64_t *featuresp);
#endif /* EFSYS_OPT_VIRTIO */
#ifdef __cplusplus

52
drivers/common/sfc_efx/base/rhead_virtio.c
View File

@ -280,4 +280,56 @@ fail1:
return (rc);
}
__checkReturn efx_rc_t
rhead_virtio_get_features(
__in efx_nic_t *enp,
__in efx_virtio_device_type_t type,
__out uint64_t *featuresp)
{
efx_mcdi_req_t req;
uint32_t features_lo;
uint32_t features_hi;
EFX_MCDI_DECLARE_BUF(payload, MC_CMD_VIRTIO_GET_FEATURES_IN_LEN,
MC_CMD_VIRTIO_GET_FEATURES_OUT_LEN);
efx_rc_t rc;
EFX_STATIC_ASSERT(EFX_VIRTIO_DEVICE_TYPE_NET ==
MC_CMD_VIRTIO_GET_FEATURES_IN_NET);
EFX_STATIC_ASSERT(EFX_VIRTIO_DEVICE_TYPE_BLOCK ==
MC_CMD_VIRTIO_GET_FEATURES_IN_BLOCK);
req.emr_cmd = MC_CMD_VIRTIO_GET_FEATURES;
req.emr_in_buf = payload;
req.emr_in_length = MC_CMD_VIRTIO_GET_FEATURES_IN_LEN;
req.emr_out_buf = payload;
req.emr_out_length = MC_CMD_VIRTIO_GET_FEATURES_OUT_LEN;
MCDI_IN_SET_DWORD(req, VIRTIO_GET_FEATURES_IN_DEVICE_ID, type);
efx_mcdi_execute(enp, &req);
if (req.emr_rc != 0) {
rc = req.emr_rc;
goto fail1;
}
if (req.emr_out_length_used < MC_CMD_VIRTIO_GET_FEATURES_OUT_LEN) {
rc = EMSGSIZE;
goto fail2;
}
features_lo = MCDI_OUT_DWORD(req, VIRTIO_GET_FEATURES_OUT_FEATURES_LO);
features_hi = MCDI_OUT_DWORD(req, VIRTIO_GET_FEATURES_OUT_FEATURES_HI);
*featuresp = ((uint64_t)features_hi << 32) | features_lo;
return (0);
fail2:
EFSYS_PROBE(fail2);
fail1:
EFSYS_PROBE1(fail1, efx_rc_t, rc);
return (rc);
}
#endif /* EFSYS_OPT_RIVERHEAD && EFSYS_OPT_VIRTIO */