Re: [RFC PATCH v1 3/3] common: spl: Add spl NVMe boot support

Hi Mayuresh,

On Thu, 29 Sept 2022 at 03:57, Mayuresh Chitale mchitale@ventanamicro.com wrote:

Add spl_nvme to read a fat partition from a bootable NVMe device.

Signed-off-by: Mayuresh Chitale mchitale@ventanamicro.com

arch/riscv/include/asm/spl.h | 1 + common/spl/Makefile | 1 + common/spl/spl_nvme.c | 44 ++++++++++++++++++++++++++++++++++++ 3 files changed, 46 insertions(+) create mode 100644 common/spl/spl_nvme.c

Reviewed-by: Simon Glass sjg@chromium.org

(but see below)

diff --git a/arch/riscv/include/asm/spl.h b/arch/riscv/include/asm/spl.h index e8a94fcb1f..5d0ba4b034 100644 --- a/arch/riscv/include/asm/spl.h +++ b/arch/riscv/include/asm/spl.h @@ -20,6 +20,7 @@ enum { BOOT_DEVICE_SPI, BOOT_DEVICE_USB, BOOT_DEVICE_SATA,

•   BOOT_DEVICE_NVME,
    BOOT_DEVICE_I2C,
    BOOT_DEVICE_BOARD,
    BOOT_DEVICE_DFU,
  

diff --git a/common/spl/Makefile b/common/spl/Makefile index 13db3df993..4bcc3d7e68 100644 --- a/common/spl/Makefile +++ b/common/spl/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_$(SPL_TPL_)USB_STORAGE) += spl_usb.o obj-$(CONFIG_$(SPL_TPL_)FS_FAT) += spl_fat.o obj-$(CONFIG_$(SPL_TPL_)FS_EXT4) += spl_ext.o obj-$(CONFIG_$(SPL_TPL_)SATA) += spl_sata.o +obj-$(CONFIG_$(SPL_TPL_)NVME) += spl_nvme.o obj-$(CONFIG_$(SPL_TPL_)SEMIHOSTING) += spl_semihosting.o obj-$(CONFIG_$(SPL_TPL_)DFU) += spl_dfu.o obj-$(CONFIG_$(SPL_TPL_)SPI_LOAD) += spl_spi.o diff --git a/common/spl/spl_nvme.c b/common/spl/spl_nvme.c new file mode 100644 index 0000000000..d8a9dba845 --- /dev/null +++ b/common/spl/spl_nvme.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0+ +/*

• • Copyright (C) 2022
• • Ventana Micro Systems Inc.
• • Derived work from spl_sata.c
• */

+#include <common.h> +#include <spl.h> +#include <errno.h> +#include <fat.h> +#include <nvme.h> +#include <init.h>

Should go above nvme.h

+static int spl_nvme_load_image(struct spl_image_info *spl_image,

•                          struct spl_boot_device *bootdev)
  

+{

•   int ret;
  

•   struct blk_desc *blk_desc;
  

•   ret = pci_init();
  

•   if (ret < 0)
  

•           goto out;
  

•   ret = nvme_scan_namespace();
  

•   if (ret < 0)
  

•           goto out;
  

•   blk_show_device(IF_TYPE_NVME, CONFIG_SPL_NVME_BOOT_DEVICE);
  

•   blk_desc = blk_get_devnum_by_type(IF_TYPE_NVME,
  

•                                     CONFIG_SPL_NVME_BOOT_DEVICE);
  

I think we need to move this to device tree, but it is OK for now.

•   if (IS_ENABLED(CONFIG_SPL_FS_FAT))
  

•           ret = spl_load_image_fat(spl_image, bootdev, blk_desc,
  

•                                    CONFIG_SYS_NVME_FAT_BOOT_PARTITION,
  

•                                    CONFIG_SPL_PAYLOAD);
  

•   else
  

•           ret = -ENOSYS;
  

+out:

•   return ret;
  

+}

+SPL_LOAD_IMAGE_METHOD("NVME", 0, BOOT_DEVICE_NVME, spl_nvme_load_image);

2.25.1

Regards, Simon