diff options
Diffstat (limited to 'drivers/cxl/core/region.c')
| -rw-r--r-- | drivers/cxl/core/region.c | 48 |
1 files changed, 31 insertions, 17 deletions
diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index d77899650798..e8d11a988fd9 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -778,7 +778,7 @@ out: return rc; } -static int check_commit_order(struct device *dev, const void *data) +static int check_commit_order(struct device *dev, void *data) { struct cxl_decoder *cxld = to_cxl_decoder(dev); @@ -792,7 +792,7 @@ static int check_commit_order(struct device *dev, const void *data) return 0; } -static int match_free_decoder(struct device *dev, void *data) +static int match_free_decoder(struct device *dev, const void *data) { struct cxl_port *port = to_cxl_port(dev->parent); struct cxl_decoder *cxld; @@ -824,9 +824,9 @@ static int match_free_decoder(struct device *dev, void *data) return 1; } -static int match_auto_decoder(struct device *dev, void *data) +static int match_auto_decoder(struct device *dev, const void *data) { - struct cxl_region_params *p = data; + const struct cxl_region_params *p = data; struct cxl_decoder *cxld; struct range *r; @@ -1295,6 +1295,7 @@ static int cxl_port_setup_targets(struct cxl_port *port, struct cxl_region_params *p = &cxlr->params; struct cxl_decoder *cxld = cxl_rr->decoder; struct cxl_switch_decoder *cxlsd; + struct cxl_port *iter = port; u16 eig, peig; u8 eiw, peiw; @@ -1311,16 +1312,26 @@ static int cxl_port_setup_targets(struct cxl_port *port, cxlsd = to_cxl_switch_decoder(&cxld->dev); if (cxl_rr->nr_targets_set) { - int i, distance; + int i, distance = 1; + struct cxl_region_ref *cxl_rr_iter; /* - * Passthrough decoders impose no distance requirements between - * peers + * The "distance" between peer downstream ports represents which + * endpoint positions in the region interleave a given port can + * host. + * + * For example, at the root of a hierarchy the distance is + * always 1 as every index targets a different host-bridge. At + * each subsequent switch level those ports map every Nth region + * position where N is the width of the switch == distance. */ - if (cxl_rr->nr_targets == 1) - distance = 0; - else - distance = p->nr_targets / cxl_rr->nr_targets; + do { + cxl_rr_iter = cxl_rr_load(iter, cxlr); + distance *= cxl_rr_iter->nr_targets; + iter = to_cxl_port(iter->dev.parent); + } while (!is_cxl_root(iter)); + distance *= cxlrd->cxlsd.cxld.interleave_ways; + for (i = 0; i < cxl_rr->nr_targets_set; i++) if (ep->dport == cxlsd->target[i]) { rc = check_last_peer(cxled, ep, cxl_rr, @@ -1722,10 +1733,12 @@ static struct cxl_port *next_port(struct cxl_port *port) return port->parent_dport->port; } -static int match_switch_decoder_by_range(struct device *dev, void *data) +static int match_switch_decoder_by_range(struct device *dev, + const void *data) { struct cxl_switch_decoder *cxlsd; - struct range *r1, *r2 = data; + const struct range *r1, *r2 = data; + if (!is_switch_decoder(dev)) return 0; @@ -3176,9 +3189,10 @@ err: return rc; } -static int match_root_decoder_by_range(struct device *dev, void *data) +static int match_root_decoder_by_range(struct device *dev, + const void *data) { - struct range *r1, *r2 = data; + const struct range *r1, *r2 = data; struct cxl_root_decoder *cxlrd; if (!is_root_decoder(dev)) @@ -3189,11 +3203,11 @@ static int match_root_decoder_by_range(struct device *dev, void *data) return range_contains(r1, r2); } -static int match_region_by_range(struct device *dev, void *data) +static int match_region_by_range(struct device *dev, const void *data) { struct cxl_region_params *p; struct cxl_region *cxlr; - struct range *r = data; + const struct range *r = data; int rc = 0; if (!is_cxl_region(dev)) |