diff options
| author | Alison Schofield <alison.schofield@intel.com> | 2022-11-30 14:47:25 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2022-12-03 16:54:35 -0800 |
| commit | f9db85bfec0dcc01556a41d23aec47b866ab3569 (patch) | |
| tree | f0f5c864740c56254d50998b10f72698297fc8f8 /drivers/cxl/cxl.h | |
| parent | 7db0aa8cc019f4f926c19989d1c8696d3893d77c (diff) | |
| download | linux-f9db85bfec0dcc01556a41d23aec47b866ab3569.tar.bz2 | |
cxl/acpi: Support CXL XOR Interleave Math (CXIMS)
When the CFMWS is using XOR math, parse the corresponding
CXIMS structure and store the xormaps in the root decoder
structure. Use the xormaps in a new lookup, cxl_hb_xor(),
to find a targets entry in the host bridge interleave
target list.
Defined in CXL Specfication 3.0 Section: 9.17.1
Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/5794813acdf7b67cfba3609c6aaff46932fa38d0.1669847017.git.alison.schofield@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 | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index ac75554b5d76..5f611b8a37cf 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -324,18 +324,23 @@ struct cxl_switch_decoder { struct cxl_dport *target[]; }; +struct cxl_root_decoder; +typedef struct cxl_dport *(*cxl_calc_hb_fn)(struct cxl_root_decoder *cxlrd, + int pos); /** * struct cxl_root_decoder - Static platform CXL address decoder * @res: host / parent resource for region allocations * @region_id: region id for next region provisioning event * @calc_hb: which host bridge covers the n'th position by granularity + * @platform_data: platform specific configuration data * @cxlsd: base cxl switch decoder */ struct cxl_root_decoder { struct resource *res; atomic_t region_id; - struct cxl_dport *(*calc_hb)(struct cxl_root_decoder *cxlrd, int pos); + cxl_calc_hb_fn calc_hb; + void *platform_data; struct cxl_switch_decoder cxlsd; }; @@ -581,7 +586,9 @@ 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, - unsigned int nr_targets); + unsigned int nr_targets, + cxl_calc_hb_fn calc_hb); +struct cxl_dport *cxl_hb_modulo(struct cxl_root_decoder *cxlrd, int pos); 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); |