Boot from USB

deepika.s · May 11, 2021, 11:22am

Hi all,

I am trying to boot jetson xavier nx devkit from USB.

Steps followed:

using 32.4.2 L4T
sudo lsblk -p -d | grep sd
sudo parted /dev/sdb mklabel gpt
sudo parted /dev/ mkpart APP 0GB 32GB
sudo mkfs.ext4 /dev/sdb1
6.sudo mount /dev/sdb1 /mnt
sudo BOOTDEV=sda1 ./flash.sh --no-flash jetson-xavier-nx-devkit-emmc sda1
sudo mkdir tmp_system
sudo mount bootloader/system.img.raw ./tmp_system
sudo rsync -axHAWX --numeric-ids --info=progress2 --exclude=/proc ./tmp_system/ /mnt
sudo umount /mnt
sudo umount ./tmp_system
Plug the flash drive into target device and power on.

But the board boots from the emmc only?
Is there any step that I missed? Could someone please help me on the above issue

Regards,
deepika.s

deepika.s · May 11, 2021, 11:24am

Hi @WayneWWW
Could you please help me on the above issue…

Regards,
deepika.s

WayneWWW · May 11, 2021, 11:25am

Again, please dump the log first.

deepika.s · May 11, 2021, 11:32am

Thanks for your response @WayneWWW

I have attached the dmesg, PFA.
dmesg.txt (68.5 KB)

Regards,
deepika.s

WayneWWW · May 11, 2021, 11:36am

If you want to check boot log, you should also share your bootloader log from uart.

In your dmesg, I see the root device is still mmcblk0p1. It means cboot still search the extlinux.conf from your emmc but not external storage.

deepika.s · May 12, 2021, 1:57pm

Thanks for you response @WayneWWW ,

I wrongly tried with 32.4.2. By following https://docs.nvidia.com/jetson/l4t/#page/Tegra%20Linux%20Driver%20Package%20Development%20Guide/flashing.html#wwpID0E0HM0HA with L4T 32.5, the board boots from USB on xavier-nx-devkit

I tried the same thing on the custom board with xavier-nx som, but the board was not booting from USB.
I have attached the dmesg and uart logs, PFA
dmesg.txt (60.2 KB)
uart_log.txt (84.2 KB)

Is there any hardware or software dependency that has to be taken care for booting from USB ?
Could you please help me on the above issue…

Regards,
deepika.s

WayneWWW · May 12, 2021, 2:00pm

The error log indicates cboot says your root file system is corrupted on usb drive.

[0006.884] I> Fallback: assuming 0th partition is boot partition
[0006.884] I> Detect filesystem
[0006.891] I> ext4_mount:588: Failed to allocate memory for group descriptor
[0006.891] E> Failed to mount file system!!
[0006.892] I> Loading kernel …
[0006.892] E> Cannot open partition kernel
[0006.893] E> USB boot failed, err: 202184205

deepika.s · May 13, 2021, 12:27pm

Thanks for your response @WayneWWW

I followed the steps mentioned in the user guide to prepare the USB drive. The xavier-nx SoM flashed with 32.5 and USB pendrive with 32.5 images as such without any change works fine on the devkit booting from USB. But when used with custom board it is booting from emmc and not from USB.

I tried with both USB 2.0 and USB 3.0 pendrives.
Is there any specific change on either hardware or software side is need?

Regards,
deepika.s

WayneWWW · May 13, 2021, 1:20pm

Hi,

You can try below test

Prepare 1 custom board, 1 devkit and the usb drive.
Use your method to prepare the usb drive, plug it into custom board and see if it can boot from it.
If (2) fails, directly move this usb drive from custom board to devkit and see if it can boot from it.

If devkit can boot from it but custom board cannot, then please check if custom board can mount this usb drive after boot from emmc.

deepika.s · May 18, 2021, 10:11am

Thanks for your response @WayneWWW

As mentioned above I prepared the boards and USB. On the custom board it was not booting USB and on the devkit it was booting from USB. After custom board booted from emmc, I am able to mount the usb drive.

So far I didn’t use HDMI . But when HDMI was connected to custom board with USB drive, it booted from USB. When hdmi is not connected with USB connected, it booted from emmc. So whenever HDMI is connected I observed the custom board booted from USB and whenever hdmi is not connected it booted from emmc.
But in case of devkit there is no need for any HDMI to boot from USB.

I have attached the following logs. PFA

dmesg of devkit booted from USB without hdmi
devkit_nohdmi_usbboot_dmesg.txt (76.5 KB)
bootloader log of devkit booted from USB without hdmi
devkit_nohdmi_usbboot_bootloaderlog.txt (26.0 KB)
dmesg log of custom board without hdmi booted from emmc
custom_nohdmi_usbconnected_but_booted_emmc_dmesg.txt (62.0 KB)
bootloader log of custom board without hdmi booted from emmc
custom_nohdmi_usbconnected_but_booted_emmc_bootloader_log.txt (84.6 KB)
dmesg log of custom board with hdmi booted from USB
custom_hdmiconnected_usbconnected_booted_USB_dmesg.txt (67.4 KB)
bootloader log of custom board with hdmi booted from USB
custom_hdmiconnected_usbconnected_booted_USB_bootloader_log.txt (27.8 KB)

Could you please help me debug this issue.

Regards,
deepika

WayneWWW · May 18, 2021, 10:55am

Hi,

I checked the log. It looks and sounds like not a software issue to me. Do you mean if you connect HDMI on custom board, then cboot is able to detect file system but if HDMI is gone, then it will not find the filesystem over usb drive?

deepika.s · May 18, 2021, 11:02am

Thanks for your response @WayneWWW ,

Yes, if HDMI is physically connected the custom board boots from USB else it boots from emmc even if the USB drive is connected.

Is there anything I could check on either software or hardware side?

Regards,
deepika.s

WayneWWW · May 19, 2021, 6:40am

Hi,

Please add these 4 patches to cboot and see if it can resolve this issue.
Patch1

diff --git a/drivers/usbh/xhci.c b/drivers/usbh/xhci.c
index aa0547a..40a1aee 100644
--- a/drivers/usbh/xhci.c
+++ b/drivers/usbh/xhci.c
@@ -1774,7 +1774,6 @@
 		}
 		trb->data_buffer_lo = U64_TO_U32_LO(dma);
 		trb->data_buffer_hi = U64_TO_U32_HI(dma);
-		dma += transfer_size;
 		trb->trb_tfr_len = transfer_size;
 		trb->td_size = (total_packets - ((size + transfer_size) / ctx->curr_dev_priv->enum_dev.ep[dir].packet_size));
 		if (count != (need_trbs - 1)) {

Patch2

diff --git a/lib/gpt/tegrabl_gpt.c b/lib/gpt/tegrabl_gpt.c
index a3b3deb..203aeea 100644
--- a/lib/gpt/tegrabl_gpt.c
+++ b/lib/gpt/tegrabl_gpt.c
@@ -118,12 +118,7 @@
 	pr_trace("GPT read: for device %08x\n", dev->device_id);
 
 	size = sizeof(struct tegrabl_gpt_entry) * TEGRABL_GPT_MAX_PARTITION_ENTRIES;
-
-#if defined(CONFIG_OS_IS_L4T)
-	size += (5 * TEGRABL_BLOCKDEV_BLOCK_SIZE(dev));
-#else
 	size += TEGRABL_BLOCKDEV_BLOCK_SIZE(dev);
-#endif
 
 	if ((*buf) == NULL) {
 		buffer = (uint8_t *)tegrabl_alloc_align(TEGRABL_HEAP_DMA, 4096, size);

Patch3

diff --git a/lib/gpt/tegrabl_gpt.c b/lib/gpt/tegrabl_gpt.c
index 8aab6cb..a3b3deb 100644
--- a/lib/gpt/tegrabl_gpt.c
+++ b/lib/gpt/tegrabl_gpt.c
@@ -120,7 +120,7 @@
 	size = sizeof(struct tegrabl_gpt_entry) * TEGRABL_GPT_MAX_PARTITION_ENTRIES;
 
 #if defined(CONFIG_OS_IS_L4T)
-	size += (6 * TEGRABL_BLOCKDEV_BLOCK_SIZE(dev));
+	size += (5 * TEGRABL_BLOCKDEV_BLOCK_SIZE(dev));
 #else
 	size += TEGRABL_BLOCKDEV_BLOCK_SIZE(dev);
 #endif

Patch4

diff --git a/drivers/usbh/xhci.c b/drivers/usbh/xhci.c
index 0613876..aa0547a 100644
--- a/drivers/usbh/xhci.c
+++ b/drivers/usbh/xhci.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2020, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2018-2021, NVIDIA CORPORATION.  All rights reserved.
  *
  * NVIDIA CORPORATION and its licensors retain all intellectual property
  * and proprietary rights in and to this software, related documentation
@@ -548,7 +548,7 @@
 
 	xusbh_xhci_writel(DB(0), 0);
 	pr_debug("Ding Dong!  @%08x  0x%x\n", DB(0), xusbh_xhci_readl(DB(0)));
-	err = xusbh_wait_irq(ctx, 100);
+	err = xusbh_wait_irq(ctx, 300);
 	set_enq_ptr(&ctx->cmd_ring);
 	return err;
 }
@@ -730,7 +730,7 @@
 	xusbh_xhci_writel(DB(ctx->slot_id), DB_VALUE(ep_index, 0));
 	pr_debug("Ding Dong!!!  Ring EP%d doorbell (%x)\n", ep_index, xusbh_xhci_readl(DB(ctx->slot_id)));
 
-	err = xusbh_wait_irq(ctx, 1000);
+	err = xusbh_wait_irq(ctx, 3000);
 	return err;
 }
 
@@ -924,7 +924,7 @@
 
 	xusbh_xhci_writel(DB(0), 0);
 	pr_debug("Ding Dong!  @%08x  0x%x\n", DB(0), xusbh_xhci_readl(DB(0)));
-	err = xusbh_wait_irq(ctx, 100);
+	err = xusbh_wait_irq(ctx, 300);
 /*
 	xhci_print_slot_ctx(ctx, 0);
 	xhci_print_ep_ctx(ctx, 0, 3, 0);
@@ -990,7 +990,7 @@
 
 	xusbh_xhci_writel(DB(0), 0);
 	pr_debug("Ding Dong!  @%08x  0x%x\n", DB(0), xusbh_xhci_readl(DB(0)));
-	err = xusbh_wait_irq(ctx, 100);
+	err = xusbh_wait_irq(ctx, 300);
 	tegrabl_dma_unmap_buffer(TEGRABL_MODULE_XUSB_HOST, 0, (void *)ctx->curr_dev_priv->dev_context, sizeof(struct EP) * 10,
 							 TEGRABL_DMA_FROM_DEVICE);
 /*

deepika.s · May 19, 2021, 7:52am

Thanks for your response @WayneWWW ,

I downloaded cboot sources from the link https://developer.nvidia.com/embedded/L4T/r32_Release_v5.0/sources/T186/cboot_src_t19x.tbz2
Tried to apply the patches. I was able to apply patch1 and patch4 but patches 2 & 3 related to lib/gpt/tegrabl_gpt.c, I am not able to apply. I am getting the below error

$git apply patch2.patch
error: patch failed: lib/gpt/tegrabl_gpt.c:118
error: lib/gpt/tegrabl_gpt.c: patch does not apply

Regards,
deepika.s

WayneWWW · May 19, 2021, 8:02am

Hi,

For patch 2,3, please directly add the size+= … to the tegrabl_gpt.c

    pr_trace("GPT read: for device %08x\n", dev->device_id);
 
 	size = sizeof(struct tegrabl_gpt_entry) * TEGRABL_GPT_MAX_PARTITION_ENTRIES;

    +#if defined(CONFIG_OS_IS_L4T)
   	 +    size += (5 * TEGRABL_BLOCKDEV_BLOCK_SIZE(dev));
     +#else
     +    size += TEGRABL_BLOCKDEV_BLOCK_SIZE(dev);
     +#endif

deepika.s · May 19, 2021, 10:02am

Hi @WayneWWW

I set the cross_compile path following the link: https://docs.nvidia.com/jetson/l4t/index.html#page/Tegra%20Linux%20Driver%20Package%20Development%20Guide/xavier_toolchain.html
Python version used is
$python --version
Python 2.7.17
I followed CBoot_Standalone_Readme_t194.txt to build the cboot binary.
while executing the below command I am facing errors.
$ make -C ./bootloader/partner/t18x/cboot PROJECT=t194 TOOLCHAIN_PREFIX=“${CROSS_COMPILE}” DEBUG=2 BUILDROOT=“${PWD}”/out NV_TARGET_BOARD=t194ref NV_BUILD_SYSTEM_TYPE=l4t NOECHO=@

I have attached the error log PFA
cboot_error (223.8 KB)

Did I miss any step or did I follow something wrong?
Could you please help me solve this…

Regards,
deepika.s

deepika.s · May 19, 2021, 10:54am

Hi @WayneWWW

Could you please help me on the above query?

Regards,
deepika.s

WayneWWW · May 20, 2021, 6:56am

Hello,

Where did you download your source code?

deepika.s · May 20, 2021, 7:02am

Thanks for your response @WayneWWW ,

I downloaded it in my laptop in the directory ~/Downloads/cboot and exported cross_compiler and tried to build.

Regards,
deepika.s

WayneWWW · May 20, 2021, 7:08am

I mean which website or URL link did you download this source code tarball from?

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