korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-25 03:55:09 +08:00
Code Issues Packages Projects Releases Wiki Activity

tools/testing/cxl: Enumerate mock decoders

Browse Source 
Enumerate 2-decoders per switch port and endpoint in the cxl_test
topology.

Link: https://lore.kernel.org/r/164298432699.3018233.12131068635065601541.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2022-01-23 16:32:07 -08:00
parent c1915142e8
commit 7c7d68db02
1 changed files with 99 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

120
tools/testing/cxl/test/cxl.c
View File

@ -14,6 +14,7 @@
#define NR_CXL_HOST_BRIDGES 2
#define NR_CXL_ROOT_PORTS 2
#define NR_CXL_SWITCH_PORTS 2
#define NR_CXL_PORT_DECODERS 2
static struct platform_device *cxl_acpi;
static struct platform_device *cxl_host_bridge[NR_CXL_HOST_BRIDGES];
@ -406,38 +407,115 @@ static int mock_cxl_add_passthrough_decoder(struct cxl_port *port)
return -EOPNOTSUPP;
}
struct target_map_ctx {
int *target_map;
int index;
int target_count;
};
static int map_targets(struct device *dev, void *data)
{
struct platform_device *pdev = to_platform_device(dev);
struct target_map_ctx *ctx = data;
ctx->target_map[ctx->index++] = pdev->id;
if (ctx->index > ctx->target_count) {
dev_WARN_ONCE(dev, 1, "too many targets found?\n");
return -ENXIO;
}
return 0;
}
static int mock_cxl_enumerate_decoders(struct cxl_hdm *cxlhdm)
{
struct cxl_port *port = cxlhdm->port;
struct cxl_port *parent_port = to_cxl_port(port->dev.parent);
int target_count, i;
if (is_cxl_endpoint(port))
target_count = 0;
else if (is_cxl_root(parent_port))
target_count = NR_CXL_ROOT_PORTS;
else
target_count = NR_CXL_SWITCH_PORTS;
for (i = 0; i < NR_CXL_PORT_DECODERS; i++) {
int target_map[CXL_DECODER_MAX_INTERLEAVE] = { 0 };
struct target_map_ctx ctx = {
.target_map = target_map,
.target_count = target_count,
};
struct cxl_decoder *cxld;
int rc;
if (target_count)
cxld = cxl_switch_decoder_alloc(port, target_count);
else
cxld = cxl_endpoint_decoder_alloc(port);
if (IS_ERR(cxld)) {
dev_warn(&port->dev,
"Failed to allocate the decoder\n");
return PTR_ERR(cxld);
}
cxld->decoder_range = (struct range) {
.start = 0,
.end = -1,
};
cxld->flags = CXL_DECODER_F_ENABLE;
cxld->interleave_ways = min_not_zero(target_count, 1);
cxld->interleave_granularity = SZ_4K;
cxld->target_type = CXL_DECODER_EXPANDER;
if (target_count) {
rc = device_for_each_child(port->uport, &ctx,
map_targets);
if (rc) {
put_device(&cxld->dev);
return rc;
}
}
rc = cxl_decoder_add_locked(cxld, target_map);
if (rc) {
put_device(&cxld->dev);
dev_err(&port->dev, "Failed to add decoder\n");
return rc;
}
rc = cxl_decoder_autoremove(&port->dev, cxld);
if (rc)
return rc;
dev_dbg(&cxld->dev, "Added to port %s\n", dev_name(&port->dev));
}
return 0;
}
static int mock_cxl_port_enumerate_dports(struct cxl_port *port)
{
struct device *dev = &port->dev;
int i;
struct platform_device **array;
int i, array_size;
for (i = 0; i < ARRAY_SIZE(cxl_root_port); i++) {
struct platform_device *pdev = cxl_root_port[i];
struct cxl_dport *dport;
if (pdev->dev.parent != port->uport)
continue;
dport = devm_cxl_add_dport(port, &pdev->dev, pdev->id,
CXL_RESOURCE_NONE);
if (IS_ERR(dport)) {
dev_err(dev, "failed to add dport: %s (%ld)\n",
dev_name(&pdev->dev), PTR_ERR(dport));
return PTR_ERR(dport);
}
dev_dbg(dev, "add dport%d: %s\n", pdev->id,
dev_name(&pdev->dev));
if (port->depth == 1) {
array_size = ARRAY_SIZE(cxl_root_port);
array = cxl_root_port;
} else if (port->depth == 2) {
array_size = ARRAY_SIZE(cxl_switch_dport);
array = cxl_switch_dport;
} else {
dev_WARN_ONCE(&port->dev, 1, "unexpected depth %d\n",
port->depth);
return -ENXIO;
}
for (i = 0; i < ARRAY_SIZE(cxl_switch_dport); i++) {
struct platform_device *pdev = cxl_switch_dport[i];
for (i = 0; i < array_size; i++) {
struct platform_device *pdev = array[i];
struct cxl_dport *dport;
if (pdev->dev.parent != port->uport)