cxl: Introduce to_{ram,pmem}_{res,perf}() helpers

In preparation for consolidating all DPA partition information into an
array of DPA metadata, introduce helpers that hide the layout of the
current data. I.e. make the eventual replacement of ->ram_res,
->pmem_res, ->ram_perf, and ->pmem_perf with a new DPA metadata array a
no-op for code paths that consume that information, and reduce the noise
of follow-on patches.

The end goal is to consolidate all DPA information in 'struct
cxl_dev_state', but for now the helpers just make it appear that all DPA
metadata is relative to @cxlds.

As the conversion to generic partition metadata walking is completed,
these helpers will naturally be eliminated, or reduced in scope.

Cc: Alejandro Lucero <alucerop@amd.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Fan Ni <fan.ni@samsung.com>
Tested-by: Alejandro Lucero <alucerop@amd.com>
Link: https://patch.msgid.link/173864305238.668823.16553986866633608541.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>

1 files changed, 14 insertions, 11 deletions

diff --git a/tools/testing/cxl/test/cxl.c b/tools/testing/cxl/test/cxl.c
index cc8948f49117..9654513bbccf 100644
--- a/tools/testing/cxl/test/cxl.c
+++ b/tools/testing/cxl/test/cxl.c
@@ -1000,25 +1000,28 @@ static void mock_cxl_endpoint_parse_cdat(struct cxl_port *port)
 		find_cxl_root(port);
 	struct cxl_memdev *cxlmd = to_cxl_memdev(port->uport_dev);
 	struct cxl_dev_state *cxlds = cxlmd->cxlds;
-	struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlds);
 	struct access_coordinate ep_c[ACCESS_COORDINATE_MAX];
-	struct range pmem_range = {
-		.start = cxlds->pmem_res.start,
-		.end = cxlds->pmem_res.end,
+	const struct resource *partition[] = {
+		to_ram_res(cxlds),
+		to_pmem_res(cxlds),
 	};
-	struct range ram_range = {
-		.start = cxlds->ram_res.start,
-		.end = cxlds->ram_res.end,
+	struct cxl_dpa_perf *perf[] = {
+		to_ram_perf(cxlds),
+		to_pmem_perf(cxlds),
 	};
 
 	if (!cxl_root)
 		return;
 
-	if (range_len(&ram_range))
-		dpa_perf_setup(port, &ram_range, &mds->ram_perf);
+	for (int i = 0; i < ARRAY_SIZE(partition); i++) {
+		const struct resource *res = partition[i];
+		struct range range = {
+			.start = res->start,
+			.end = res->end,
+		};
 
-	if (range_len(&pmem_range))
-		dpa_perf_setup(port, &pmem_range, &mds->pmem_perf);
+		dpa_perf_setup(port, &range, perf[i]);
+	}
 
 	cxl_memdev_update_perf(cxlmd);