Commit 5b6031c8 authored by Li Ming's avatar Li Ming Committed by Dave Jiang
Browse files

cxl/core: Introduce a new helper cxl_resource_contains_addr() 



In CXL subsystem, many functions need to check an address availability
by checking if the resource range contains the address. Providing a new
helper function cxl_resource_contains_addr() to check if the resource
range contains the input address.

Suggested-by: default avatarAlison Schofield <alison.schofield@intel.com>
Signed-off-by: default avatarLi Ming <ming.li@zohomail.com>
Tested-by: default avatarShiju Jose <shiju.jose@huawei.com>
Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: default avatarDave Jiang <dave.jiang@intel.com>
Reviewed-by: default avatarJonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: default avatarAlison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20250711032357.127355-2-ming.li@zohomail.com


Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
parent ac0fe6a5

drivers/cxl/core/core.h

+1 −0
Original line number Diff line number Diff line
@@ -80,6 +80,7 @@ int cxl_dpa_alloc(struct cxl_endpoint_decoder *cxled, u64 size); 
int cxl_dpa_free(struct cxl_endpoint_decoder *cxled);

resource_size_t cxl_dpa_size(struct cxl_endpoint_decoder *cxled);

resource_size_t cxl_dpa_resource_start(struct cxl_endpoint_decoder *cxled);

bool cxl_resource_contains_addr(const struct resource *res, const resource_size_t addr);



enum cxl_rcrb {

	CXL_RCRB_DOWNSTREAM,

drivers/cxl/core/hdm.c

+7 −0
Original line number Diff line number Diff line
@@ -547,6 +547,13 @@ resource_size_t cxl_dpa_resource_start(struct cxl_endpoint_decoder *cxled) 
	return base;

}



bool cxl_resource_contains_addr(const struct resource *res, const resource_size_t addr)

{

	struct resource _addr = DEFINE_RES_MEM(addr, 1);



	return resource_contains(res, &_addr);

}



int cxl_dpa_free(struct cxl_endpoint_decoder *cxled)

{

	struct cxl_port *port = cxled_to_port(cxled);