From: Ben Widawsky <ben.widawsky@xxxxxxxxx> Unused CXL decoders, or ports which use a passthrough decoder (no HDM decoder registers) are expected to be initialized in a specific way. Since upcoming drivers will want the same initialization, and it was already a requirement to have consumers of the API configure the decoder specific to their needs, initialize to this passthrough state by default. Signed-off-by: Ben Widawsky <ben.widawsky@xxxxxxxxx> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx> --- drivers/cxl/acpi.c | 5 ----- drivers/cxl/core/port.c | 9 ++++++++- 2 files changed, 8 insertions(+), 6 deletions(-) diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c index 0b267eabb15e..4e8086525edc 100644 --- a/drivers/cxl/acpi.c +++ b/drivers/cxl/acpi.c @@ -264,11 +264,6 @@ static int add_host_bridge_uport(struct device *match, void *arg) if (IS_ERR(cxld)) return PTR_ERR(cxld); - cxld->interleave_ways = 1; - cxld->interleave_granularity = PAGE_SIZE; - cxld->target_type = CXL_DECODER_EXPANDER; - cxld->platform_res = (struct resource)DEFINE_RES_MEM(0, 0); - device_lock(&port->dev); dport = list_first_entry(&port->dports, typeof(*dport), list); device_unlock(&port->dev); diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c index 2910c36a0e58..826b300ba950 100644 --- a/drivers/cxl/core/port.c +++ b/drivers/cxl/core/port.c @@ -505,7 +505,8 @@ static int decoder_populate_targets(struct cxl_decoder *cxld, * some address space for CXL.mem utilization. A decoder is expected to be * configured by the caller before registering. * - * Return: A new cxl decoder to be registered by cxl_decoder_add() + * Return: A new cxl decoder to be registered by cxl_decoder_add(). The decoder + * is initialized to be a "passthrough" decoder. */ static struct cxl_decoder *cxl_decoder_alloc(struct cxl_port *port, unsigned int nr_targets) @@ -537,6 +538,12 @@ static struct cxl_decoder *cxl_decoder_alloc(struct cxl_port *port, else cxld->dev.type = &cxl_decoder_switch_type; + /* Pre initialize an "empty" decoder */ + cxld->interleave_ways = 1; + cxld->interleave_granularity = PAGE_SIZE; + cxld->target_type = CXL_DECODER_EXPANDER; + cxld->platform_res = (struct resource)DEFINE_RES_MEM(0, 0); + return cxld; err: kfree(cxld);
