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cxl/region: Rename function to cxl_port_pick_region_decoder()

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Current function cxl_region_find_decoder() is used to find a port's
decoder during region setup. In the region creation path the function
is an allocator to find a free port. In the region assembly path, it
is recalling the decoder that platform firmware picked for validation
purposes.

Rename function to cxl_port_pick_region_decoder() that better
describes its use and update the function's description.

The result of cxl_port_pick_region_decoder() is recorded in a 'struct
cxl_region_ref' in @port for later recall when other endpoints might
also be targets of the picked decoder.

Signed-off-by: Robert Richter <rrichter@amd.com>
Reviewed-by: Gregory Price <gourry@gourry.net>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: "Fabio M. De Francesco" <fabio.m.de.francesco@linux.intel.com>
Tested-by: Gregory Price <gourry@gourry.net>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Link: https://patch.msgid.link/20250509150700.2817697-6-rrichter@amd.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
This commit is contained in:
Robert Richter 2025-05-09 17:06:50 +02:00 committed by Dave Jiang
parent 99ff9060b2
commit a3a96873b2
1 changed files with 18 additions and 5 deletions
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23
drivers/cxl/core/region.c
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@ -864,10 +864,23 @@ static int match_auto_decoder(struct device *dev, const void *data)
return 0;
}
/**
* cxl_port_pick_region_decoder() - assign or lookup a decoder for a region
* @port: a port in the ancestry of the endpoint implied by @cxled
* @cxled: endpoint decoder to be, or currently, mapped by @port
* @cxlr: region to establish, or validate, decode @port
*
* In the region creation path cxl_port_pick_region_decoder() is an
* allocator to find a free port. In the region assembly path, it is
* recalling the decoder that platform firmware picked for validation
* purposes.
*
* The result is recorded in a 'struct cxl_region_ref' in @port.
*/
static struct cxl_decoder *
cxl_region_find_decoder(struct cxl_port *port,
struct cxl_endpoint_decoder *cxled,
struct cxl_region *cxlr)
cxl_port_pick_region_decoder(struct cxl_port *port,
struct cxl_endpoint_decoder *cxled,
struct cxl_region *cxlr)
{
struct device *dev;
@ -931,7 +944,7 @@ alloc_region_ref(struct cxl_port *port, struct cxl_region *cxlr,
if (test_bit(CXL_REGION_F_AUTO, &cxlr->flags)) {
struct cxl_decoder *cxld;
cxld = cxl_region_find_decoder(port, cxled, cxlr);
cxld = cxl_port_pick_region_decoder(port, cxled, cxlr);
if (auto_order_ok(port, iter->region, cxld))
continue;
}
@ -1019,7 +1032,7 @@ static int cxl_rr_alloc_decoder(struct cxl_port *port, struct cxl_region *cxlr,
{
struct cxl_decoder *cxld;
cxld = cxl_region_find_decoder(port, cxled, cxlr);
cxld = cxl_port_pick_region_decoder(port, cxled, cxlr);
if (!cxld) {
dev_dbg(&cxlr->dev, "%s: no decoder available\n",
dev_name(&port->dev));