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https://github.com/brain-hackers/u-boot-brain
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NVM Express (NVMe) is a register level interface that allows host software to communicate with a non-volatile memory subsystem. This interface is optimized for enterprise and client solid state drives, typically attached to the PCI express interface. This adds a U-Boot driver support of devices that follow the NVMe standard [1] and supports basic read/write operations. Tested with a 400GB Intel SSD 750 series NVMe card with controller id 8086:0953. [1] http://www.nvmexpress.org/resources/specifications/ Signed-off-by: Zhikang Zhang <zhikang.zhang@nxp.com> Signed-off-by: Wenbin Song <wenbin.song@nxp.com> Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Tom Rini <trini@konsulko.com>
72 lines
2.3 KiB
C
72 lines
2.3 KiB
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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#ifndef __NVME_H__
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#define __NVME_H__
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struct nvme_dev;
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/**
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* nvme_identify - identify controller or namespace capabilities and status
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*
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* This issues an identify command to the NVMe controller to return a data
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* buffer that describes the controller or namespace capabilities and status.
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*
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* @dev: NVMe controller device
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* @nsid: 0 for controller, namespace id for namespace to identify
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* @cns: 1 for controller, 0 for namespace
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* @dma_addr: dma buffer address to store the identify result
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* @return: 0 on success, -ETIMEDOUT on command execution timeout,
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* -EIO on command execution fails
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*/
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int nvme_identify(struct nvme_dev *dev, unsigned nsid,
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unsigned cns, dma_addr_t dma_addr);
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/**
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* nvme_get_features - retrieve the attributes of the feature specified
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*
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* This retrieves the attributes of the feature specified.
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*
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* @dev: NVMe controller device
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* @fid: feature id to provide data
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* @nsid: namespace id the command applies to
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* @dma_addr: data structure used as part of the specified feature
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* @result: command-specific result in the completion queue entry
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* @return: 0 on success, -ETIMEDOUT on command execution timeout,
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* -EIO on command execution fails
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*/
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int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
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dma_addr_t dma_addr, u32 *result);
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/**
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* nvme_set_features - specify the attributes of the feature indicated
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*
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* This specifies the attributes of the feature indicated.
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*
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* @dev: NVMe controller device
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* @fid: feature id to provide data
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* @dword11: command-specific input parameter
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* @dma_addr: data structure used as part of the specified feature
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* @result: command-specific result in the completion queue entry
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* @return: 0 on success, -ETIMEDOUT on command execution timeout,
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* -EIO on command execution fails
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*/
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int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
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dma_addr_t dma_addr, u32 *result);
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/**
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* nvme_scan_namespace - scan all namespaces attached to NVMe controllers
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*
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* This probes all registered NVMe uclass device drivers in the system,
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* and tries to find all namespaces attached to the NVMe controllers.
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*
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* @return: 0 on success, -ve on error
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*/
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int nvme_scan_namespace(void);
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#endif /* __NVME_H__ */
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