diff options
Diffstat (limited to 'gxp-ssmt.c')
| -rw-r--r-- | gxp-ssmt.c | 49 |
1 files changed, 36 insertions, 13 deletions
@@ -11,6 +11,11 @@ #include "gxp-internal.h" #include "gxp-ssmt.h" +static inline bool ssmt_is_client_driven(struct gxp_ssmt *ssmt) +{ + return readl(ssmt->idma_ssmt_base + SSMT_CFG_OFFSET) == SSMT_MODE_CLIENT; +} + static inline void ssmt_set_vid_for_idx(void __iomem *ssmt, uint vid, uint idx) { /* NS_READ_STREAM_VID_<sid> */ @@ -74,20 +79,38 @@ void gxp_ssmt_set_core_vid(struct gxp_ssmt *ssmt, uint core, uint vid) } } -void gxp_ssmt_set_bypass(struct gxp_ssmt *ssmt) +/* + * Programs SSMT to always use SCIDs as VIDs. + * Assumes clamp mode. + */ +static void gxp_ssmt_set_bypass(struct gxp_ssmt *ssmt) +{ + uint core; + + for (core = 0; core < GXP_NUM_CORES; core++) + gxp_ssmt_set_core_vid(ssmt, core, SSMT_CLAMP_MODE_BYPASS); +} + +void gxp_ssmt_activate_scid(struct gxp_ssmt *ssmt, uint scid) +{ + if (ssmt_is_client_driven(ssmt)) { + ssmt_set_vid_for_idx(ssmt->idma_ssmt_base, scid, scid); + ssmt_set_vid_for_idx(ssmt->inst_data_ssmt_base, scid, scid); + } else { + /* + * In clamp mode, we can't configure specific SCID. We can only mark all + * transactions as "bypassed" which have all streams to use their SCID as VID. + */ + gxp_ssmt_set_bypass(ssmt); + } +} + +void gxp_ssmt_deactivate_scid(struct gxp_ssmt *ssmt, uint scid) { - u32 mode; - uint core, i; - - mode = readl(ssmt->idma_ssmt_base + SSMT_CFG_OFFSET); - if (mode == SSMT_MODE_CLIENT) { - for (i = 0; i < MAX_NUM_CONTEXTS; i++) { - ssmt_set_vid_for_idx(ssmt->idma_ssmt_base, i, i); - ssmt_set_vid_for_idx(ssmt->inst_data_ssmt_base, i, i); - } + if (ssmt_is_client_driven(ssmt)) { + ssmt_set_vid_for_idx(ssmt->idma_ssmt_base, scid, 0); + ssmt_set_vid_for_idx(ssmt->inst_data_ssmt_base, scid, 0); } else { - for (core = 0; core < GXP_NUM_CORES; core++) - gxp_ssmt_set_core_vid(ssmt, core, - SSMT_CLAMP_MODE_BYPASS); + dev_warn_once(ssmt->gxp->dev, "Unable to deactivate context on clamp mode"); } } |