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| author | Dan Williams <dan.j.williams@intel.com> | 2022-05-21 16:24:14 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2022-07-21 08:41:20 -0700 |
| commit | 3bf65915cefa879e3693a824d8801a08e4778619 (patch) | |
| tree | ce0808cf81df257bf3f19c18a6c421067c4d806d /drivers/cxl/cxl.h | |
| parent | 0f157c7fa1a0e1a55b602d8b269344392e9033ad (diff) | |
| download | linux-3bf65915cefa879e3693a824d8801a08e4778619.tar.gz | |
cxl/core: Define a 'struct cxl_endpoint_decoder'
Previously the target routing specifics of switch decoders and platform
CXL window resource tracking of root decoders were factored out of
'struct cxl_decoder'. While switch decoders translate from SPA to
downstream ports, endpoint decoders translate from SPA to DPA.
This patch, 3 of 3, adds a 'struct cxl_endpoint_decoder' that tracks an
endpoint-specific Device Physical Address (DPA) resource. For now this
just defines ->dpa_res, a follow-on patch will handle requesting DPA
resource ranges from a device-DPA resource tree.
Co-developed-by: Ben Widawsky <bwidawsk@kernel.org>
Signed-off-by: Ben Widawsky <bwidawsk@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/165784327088.1758207.15502834501671201192.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/cxl.h')
| -rw-r--r-- | drivers/cxl/cxl.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index e05a3e6adfdb..e0b1e2e4dfee 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -240,6 +240,18 @@ struct cxl_decoder { }; /** + * struct cxl_endpoint_decoder - Endpoint / SPA to DPA decoder + * @cxld: base cxl_decoder_object + * @dpa_res: actively claimed DPA span of this decoder + * @skip: offset into @dpa_res where @cxld.hpa_range maps + */ +struct cxl_endpoint_decoder { + struct cxl_decoder cxld; + struct resource *dpa_res; + resource_size_t skip; +}; + +/** * struct cxl_switch_decoder - Switch specific CXL HDM Decoder * @cxld: base cxl_decoder object * @target_lock: coordinate coherent reads of the target list @@ -394,6 +406,7 @@ struct cxl_dport *cxl_find_dport_by_dev(struct cxl_port *port, struct cxl_decoder *to_cxl_decoder(struct device *dev); struct cxl_root_decoder *to_cxl_root_decoder(struct device *dev); +struct cxl_endpoint_decoder *to_cxl_endpoint_decoder(struct device *dev); bool is_root_decoder(struct device *dev); bool is_endpoint_decoder(struct device *dev); struct cxl_root_decoder *cxl_root_decoder_alloc(struct cxl_port *port, @@ -401,7 +414,7 @@ struct cxl_root_decoder *cxl_root_decoder_alloc(struct cxl_port *port, 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); -struct cxl_decoder *cxl_endpoint_decoder_alloc(struct cxl_port *port); +struct cxl_endpoint_decoder *cxl_endpoint_decoder_alloc(struct cxl_port *port); int cxl_decoder_add_locked(struct cxl_decoder *cxld, int *target_map); int cxl_decoder_autoremove(struct device *host, struct cxl_decoder *cxld); int cxl_endpoint_autoremove(struct cxl_memdev *cxlmd, struct cxl_port *endpoint); |