Function nvme_identify

components/drivers/nvme/nvme.c:693–726

}

static rt_err_t nvme_identify(struct rt_nvme_controller *nvme,
        rt_uint32_t nsid, rt_uint32_t cns, void *data)
{
    rt_err_t err;
    rt_uint32_t page_size = nvme->page_size;
    rt_ubase_t data_phy = (rt_ubase_t)rt_kmem_v2p(data);
    int offset = data_phy & (page_size - 1);
    struct rt_nvme_command cmd;

    rt_memset(&cmd, 0, sizeof(cmd));
    cmd.identify.opcode = RT_NVME_ADMIN_OPCODE_IDENTIFY;
    cmd.identify.nsid = rt_cpu_to_le32(nsid);
    cmd.identify.prp1 = rt_cpu_to_le64(data_phy);

    if (sizeof(struct rt_nvme_id_ctrl) <= page_size - offset)
    {
        cmd.identify.prp2 = 0;
    }
    else
    {
        data_phy += (page_size - offset);
        cmd.identify.prp2 = rt_cpu_to_le64(data_phy);
    }
    cmd.identify.cns = rt_cpu_to_le32(cns);

    rt_hw_cpu_dcache_ops(RT_HW_CACHE_FLUSH, data, sizeof(struct rt_nvme_id_ctrl));

    if (!(err = nvme_submit_cmd(&nvme->admin_queue, &cmd)))
    {
        rt_hw_cpu_dcache_ops(RT_HW_CACHE_INVALIDATE, data, sizeof(struct rt_nvme_id_ctrl));
    }

    return err;
}

static rt_err_t nvme_attach_queue(struct rt_nvme_queue *queue, rt_uint8_t opcode)
{