diff options
| -rw-r--r-- | drivers/cxl/acpi.c | 40 | ||||
| -rw-r--r-- | drivers/cxl/core/port.c | 34 | ||||
| -rw-r--r-- | drivers/cxl/cxl.h | 15 |
3 files changed, 76 insertions, 13 deletions
diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c index e2b6cbd04846..8f021241699f 100644 --- a/drivers/cxl/acpi.c +++ b/drivers/cxl/acpi.c @@ -84,7 +84,7 @@ static int cxl_parse_cfmws(union acpi_subtable_headers *header, void *arg, struct cxl_cfmws_context *ctx = arg; struct cxl_port *root_port = ctx->root_port; struct resource *cxl_res = ctx->cxl_res; - struct cxl_switch_decoder *cxlsd; + struct cxl_root_decoder *cxlrd; struct device *dev = ctx->dev; struct acpi_cedt_cfmws *cfmws; struct cxl_decoder *cxld; @@ -128,11 +128,11 @@ static int cxl_parse_cfmws(union acpi_subtable_headers *header, void *arg, if (rc) goto err_insert; - cxlsd = cxl_root_decoder_alloc(root_port, ways); - if (IS_ERR(cxld)) + cxlrd = cxl_root_decoder_alloc(root_port, ways); + if (IS_ERR(cxlrd)) return 0; - cxld = &cxlsd->cxld; + cxld = &cxlrd->cxlsd.cxld; cxld->flags = cfmws_to_decoder_flags(cfmws->restrictions); cxld->target_type = CXL_DECODER_EXPANDER; cxld->hpa_range = (struct range) { @@ -409,6 +409,32 @@ static int add_cxl_resources(struct resource *cxl_res) return 0; } +static int pair_cxl_resource(struct device *dev, void *data) +{ + struct resource *cxl_res = data; + struct resource *p; + + if (!is_root_decoder(dev)) + return 0; + + for (p = cxl_res->child; p; p = p->sibling) { + struct cxl_root_decoder *cxlrd = to_cxl_root_decoder(dev); + struct cxl_decoder *cxld = &cxlrd->cxlsd.cxld; + struct resource res = { + .start = cxld->hpa_range.start, + .end = cxld->hpa_range.end, + .flags = IORESOURCE_MEM, + }; + + if (resource_contains(p, &res)) { + cxlrd->res = cxl_get_public_resource(p); + break; + } + } + + return 0; +} + static int cxl_acpi_probe(struct platform_device *pdev) { int rc; @@ -460,6 +486,12 @@ static int cxl_acpi_probe(struct platform_device *pdev) return rc; /* + * Populate the root decoders with their related iomem resource, + * if present + */ + device_for_each_child(&root_port->dev, cxl_res, pair_cxl_resource); + + /* * Root level scanned with host-bridge as dports, now scan host-bridges * for their role as CXL uports to their CXL-capable PCIe Root Ports. */ diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c index 3ce7a1b023d5..972bca7e3370 100644 --- a/drivers/cxl/core/port.c +++ b/drivers/cxl/core/port.c @@ -260,6 +260,23 @@ static void cxl_switch_decoder_release(struct device *dev) kfree(cxlsd); } +struct cxl_root_decoder *to_cxl_root_decoder(struct device *dev) +{ + if (dev_WARN_ONCE(dev, !is_root_decoder(dev), + "not a cxl_root_decoder device\n")) + return NULL; + return container_of(dev, struct cxl_root_decoder, cxlsd.cxld.dev); +} +EXPORT_SYMBOL_NS_GPL(to_cxl_root_decoder, CXL); + +static void cxl_root_decoder_release(struct device *dev) +{ + struct cxl_root_decoder *cxlrd = to_cxl_root_decoder(dev); + + __cxl_decoder_release(&cxlrd->cxlsd.cxld); + kfree(cxlrd); +} + static const struct device_type cxl_decoder_endpoint_type = { .name = "cxl_decoder_endpoint", .release = cxl_decoder_release, @@ -274,7 +291,7 @@ static const struct device_type cxl_decoder_switch_type = { static const struct device_type cxl_decoder_root_type = { .name = "cxl_decoder_root", - .release = cxl_switch_decoder_release, + .release = cxl_root_decoder_release, .groups = cxl_decoder_root_attribute_groups, }; @@ -1271,9 +1288,10 @@ static int cxl_switch_decoder_init(struct cxl_port *port, * firmware description of CXL resources into a CXL standard decode * topology. */ -struct cxl_switch_decoder *cxl_root_decoder_alloc(struct cxl_port *port, - unsigned int nr_targets) +struct cxl_root_decoder *cxl_root_decoder_alloc(struct cxl_port *port, + unsigned int nr_targets) { + struct cxl_root_decoder *cxlrd; struct cxl_switch_decoder *cxlsd; struct cxl_decoder *cxld; int rc; @@ -1281,19 +1299,21 @@ struct cxl_switch_decoder *cxl_root_decoder_alloc(struct cxl_port *port, if (!is_cxl_root(port)) return ERR_PTR(-EINVAL); - cxlsd = kzalloc(struct_size(cxlsd, target, nr_targets), GFP_KERNEL); - if (!cxlsd) + cxlrd = kzalloc(struct_size(cxlrd, cxlsd.target, nr_targets), + GFP_KERNEL); + if (!cxlrd) return ERR_PTR(-ENOMEM); + cxlsd = &cxlrd->cxlsd; rc = cxl_switch_decoder_init(port, cxlsd, nr_targets); if (rc) { - kfree(cxlsd); + kfree(cxlrd); return ERR_PTR(rc); } cxld = &cxlsd->cxld; cxld->dev.type = &cxl_decoder_root_type; - return cxlsd; + return cxlrd; } EXPORT_SYMBOL_NS_GPL(cxl_root_decoder_alloc, CXL); diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index 96de5c0fd388..e05a3e6adfdb 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -261,6 +261,16 @@ struct cxl_switch_decoder { /** + * struct cxl_root_decoder - Static platform CXL address decoder + * @res: host / parent resource for region allocations + * @cxlsd: base cxl switch decoder + */ +struct cxl_root_decoder { + struct resource *res; + struct cxl_switch_decoder cxlsd; +}; + +/** * enum cxl_nvdimm_brige_state - state machine for managing bus rescans * @CXL_NVB_NEW: Set at bridge create and after cxl_pmem_wq is destroyed * @CXL_NVB_DEAD: Set at brige unregistration to preclude async probing @@ -383,10 +393,11 @@ struct cxl_dport *cxl_find_dport_by_dev(struct cxl_port *port, const struct device *dev); struct cxl_decoder *to_cxl_decoder(struct device *dev); +struct cxl_root_decoder *to_cxl_root_decoder(struct device *dev); bool is_root_decoder(struct device *dev); bool is_endpoint_decoder(struct device *dev); -struct cxl_switch_decoder *cxl_root_decoder_alloc(struct cxl_port *port, - unsigned int nr_targets); +struct cxl_root_decoder *cxl_root_decoder_alloc(struct cxl_port *port, + unsigned int nr_targets); struct cxl_switch_decoder *cxl_switch_decoder_alloc(struct cxl_port *port, unsigned int nr_targets); int cxl_decoder_add(struct cxl_decoder *cxld, int *target_map); |