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https://github.com/AsahiLinux/u-boot
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18aa5a4134
At present the NVMe uclass driver uses a global variable nvme_info to store global information like namespace id, and NVMe controller driver's priv struct has a blk_dev_start that is used to calculate the namespace id based on the global information from nvme_info. This is not a good design in the DM world and can be replaced with the following changes: - Encode the namespace id in the NVMe block device name during the NVMe uclass post probe - Extract the namespace id from the device name during the NVMe block device probe - Let BLK uclass calculate the devnum for us by passing -1 to blk_create_devicef() as the devnum Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
43 lines
925 B
C
43 lines
925 B
C
/*
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* Copyright (C) 2017 NXP Semiconductors
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* Copyright (C) 2017 Bin Meng <bmeng.cn@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <errno.h>
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#include <dm.h>
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#include <dm/device.h>
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#include "nvme.h"
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static int nvme_uclass_post_probe(struct udevice *udev)
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{
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char name[20];
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struct udevice *ns_udev;
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int i, ret;
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struct nvme_dev *ndev = dev_get_priv(udev);
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/* Create a blk device for each namespace */
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for (i = 0; i < ndev->nn; i++) {
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/*
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* Encode the namespace id to the device name so that
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* we can extract it when doing the probe.
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*/
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sprintf(name, "blk#%d", i);
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/* The real blksz and size will be set by nvme_blk_probe() */
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ret = blk_create_devicef(udev, "nvme-blk", name, IF_TYPE_NVME,
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-1, 512, 0, &ns_udev);
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if (ret)
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return ret;
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}
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return 0;
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}
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UCLASS_DRIVER(nvme) = {
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.name = "nvme",
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.id = UCLASS_NVME,
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.post_probe = nvme_uclass_post_probe,
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};
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