Hi Yilun,
On 12/1/20 7:00 PM, Xu Yilun wrote:
+static int xmgmt_main_event_cb(struct platform_device *pdev,
+ enum xrt_events evt, void *arg)
+{
+ struct xmgmt_main *xmm = platform_get_drvdata(pdev);
+ struct xrt_event_arg_subdev *esd = (struct xrt_event_arg_subdev *)arg;
+ enum xrt_subdev_id id;
+ int instance;
+ size_t fwlen;
+
+ switch (evt) {
+ case XRT_EVENT_POST_CREATION: {
+ id = esd->xevt_subdev_id;
+ instance = esd->xevt_subdev_instance;
+ xrt_info(pdev, "processing event %d for (%d, %d)",
+ evt, id, instance);
+
+ if (id == XRT_SUBDEV_GPIO)
+ xmm->gpio_ready = true;
+ else if (id == XRT_SUBDEV_QSPI)
+ xmm->flash_ready = true;
+ else
+ BUG_ON(1);
+
+ if (xmm->gpio_ready && xmm->flash_ready) {
+ int rc;
+
+ rc = load_firmware_from_disk(pdev, &xmm->firmware_blp,
+ &fwlen);
+ if (rc != 0) {
+ rc = load_firmware_from_flash(pdev,
+ &xmm->firmware_blp, &fwlen);
I'm curious that before the shell metadata is loaded, how the QSPI
subdev is enumerated and get to work? The QSPI DT info itself is
stored in metadata, is it?
No, it is not from the shell metadata. The QSPI subdev info is
discovered from a rom located on the PCIE BAR pointed to by VSEC cap
found in config space.
I didn't find the creation of leaf platform devices, maybe I can find
the answer in the missing Patch #5?
Leaf driver is children of partition driver. They are created in
xrt_part_create_leaves() in xrt-partition.c.
Thanks,
Max
Thanks,
Yilun
+ }
+ if (rc == 0 && is_valid_firmware(pdev,
+ xmm->firmware_blp, fwlen))
+ (void) xmgmt_create_blp(xmm);
+ else
+ xrt_err(pdev,
+ "failed to find firmware, giving up");
+ xmm->evt_hdl = NULL;
+ }
+ break;
+ }
