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cxl/core: Introduce a new helper cxl_resource_contains_addr()

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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: Alison Schofield <alison.schofield@intel.com>
Signed-off-by: Li Ming <ming.li@zohomail.com>
Tested-by: Shiju Jose <shiju.jose@huawei.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20250711032357.127355-2-ming.li@zohomail.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
This commit is contained in:
Li Ming 2025-07-11 11:23:55 +08:00 committed by Dave Jiang
parent ac0fe6a573
commit 5b6031c832
2 changed files with 8 additions and 0 deletions
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1
drivers/cxl/core/core.h
View File

@ -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,

7
drivers/cxl/core/hdm.c
View File

@ -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);