From f6aa61d599678b74b3c4a6bd5604a0f9ac2af9b2 Mon Sep 17 00:00:00 2001
From: Zhikang Zhang <zhikang.zhang@nxp.com>
Date: Thu, 3 Aug 2017 02:30:58 -0700
Subject: nvme: Add show routine to print detailed information

This adds nvme_print_info() to show detailed NVMe controller and
namespace information.

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>

diff --git a/drivers/nvme/Makefile b/drivers/nvme/Makefile
index 7bd9fa4..1f3010a 100644
--- a/drivers/nvme/Makefile
+++ b/drivers/nvme/Makefile
@@ -4,4 +4,4 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-obj-y += nvme-uclass.o nvme.o
+obj-y += nvme-uclass.o nvme.o nvme_show.o
diff --git a/drivers/nvme/nvme_show.c b/drivers/nvme/nvme_show.c
new file mode 100644
index 0000000..5577e5d
--- /dev/null
+++ b/drivers/nvme/nvme_show.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2017 NXP Semiconductors
+ * Copyright (C) 2017 Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <nvme.h>
+#include "nvme.h"
+
+static void print_optional_admin_cmd(u16 oacs, int devnum)
+{
+	printf("Blk device %d: Optional Admin Command Support:\n",
+	       devnum);
+	printf("\tNamespace Management/Attachment: %s\n",
+	       oacs & 0x08 ? "yes" : "no");
+	printf("\tFirmware Commit/Image download: %s\n",
+	       oacs & 0x04 ? "yes" : "no");
+	printf("\tFormat NVM: %s\n",
+	       oacs & 0x02 ? "yes" : "no");
+	printf("\tSecurity Send/Receive: %s\n",
+	       oacs & 0x01 ? "yes" : "no");
+}
+
+static void print_optional_nvm_cmd(u16 oncs, int devnum)
+{
+	printf("Blk device %d: Optional NVM Command Support:\n",
+	       devnum);
+	printf("\tReservation: %s\n",
+	       oncs & 0x10 ? "yes" : "no");
+	printf("\tSave/Select field in the Set/Get features: %s\n",
+	       oncs & 0x08 ? "yes" : "no");
+	printf("\tWrite Zeroes: %s\n",
+	       oncs & 0x04 ? "yes" : "no");
+	printf("\tDataset Management: %s\n",
+	       oncs & 0x02 ? "yes" : "no");
+	printf("\tWrite Uncorrectable: %s\n",
+	       oncs & 0x01 ? "yes" : "no");
+}
+
+static void print_format_nvme_attributes(u8 fna, int devnum)
+{
+	printf("Blk device %d: Format NVM Attributes:\n", devnum);
+	printf("\tSupport Cryptographic Erase: %s\n",
+	       fna & 0x04 ? "yes" : "No");
+	printf("\tSupport erase a particular namespace: %s\n",
+	       fna & 0x02 ? "No" : "Yes");
+	printf("\tSupport format a particular namespace: %s\n",
+	       fna & 0x01 ? "No" : "Yes");
+}
+
+static void print_format(struct nvme_lbaf *lbaf)
+{
+	u8 str[][10] = {"Best", "Better", "Good", "Degraded"};
+
+	printf("\t\tMetadata Size: %d\n", le16_to_cpu(lbaf->ms));
+	printf("\t\tLBA Data Size: %d\n", 1 << lbaf->ds);
+	printf("\t\tRelative Performance: %s\n", str[lbaf->rp & 0x03]);
+}
+
+static void print_formats(struct nvme_id_ns *id, struct nvme_ns *ns)
+{
+	int i;
+
+	printf("Blk device %d: LBA Format Support:\n", ns->devnum);
+
+	for (i = 0; i < id->nlbaf; i++) {
+		printf("\tLBA Foramt %d Support: ", i);
+		if (i == ns->flbas)
+			printf("(current)\n");
+		else
+			printf("\n");
+		print_format(id->lbaf + i);
+	}
+}
+
+static void print_data_protect_cap(u8 dpc, int devnum)
+{
+	printf("Blk device %d: End-to-End Data", devnum);
+	printf("Protect Capabilities:\n");
+	printf("\tAs last eight bytes: %s\n",
+	       dpc & 0x10 ? "yes" : "No");
+	printf("\tAs first eight bytes: %s\n",
+	       dpc & 0x08 ? "yes" : "No");
+	printf("\tSupport Type3: %s\n",
+	       dpc & 0x04 ? "yes" : "No");
+	printf("\tSupport Type2: %s\n",
+	       dpc & 0x02 ? "yes" : "No");
+	printf("\tSupport Type1: %s\n",
+	       dpc & 0x01 ? "yes" : "No");
+}
+
+static void print_metadata_cap(u8 mc, int devnum)
+{
+	printf("Blk device %d: Metadata capabilities:\n", devnum);
+	printf("\tAs part of a separate buffer: %s\n",
+	       mc & 0x02 ? "yes" : "No");
+	printf("\tAs part of an extended data LBA: %s\n",
+	       mc & 0x01 ? "yes" : "No");
+}
+
+int nvme_print_info(struct udevice *udev)
+{
+	struct nvme_ns *ns = dev_get_priv(udev);
+	struct nvme_dev *dev = ns->dev;
+	struct nvme_id_ns buf_ns, *id = &buf_ns;
+	struct nvme_id_ctrl buf_ctrl, *ctrl = &buf_ctrl;
+
+	if (nvme_identify(dev, 0, 1, (dma_addr_t)ctrl))
+		return -EIO;
+
+	print_optional_admin_cmd(le16_to_cpu(ctrl->oacs), ns->devnum);
+	print_optional_nvm_cmd(le16_to_cpu(ctrl->oncs), ns->devnum);
+	print_format_nvme_attributes(ctrl->fna, ns->devnum);
+
+	if (nvme_identify(dev, ns->ns_id, 0, (dma_addr_t)id))
+		return -EIO;
+
+	print_formats(id, ns);
+	print_data_protect_cap(id->dpc, ns->devnum);
+	print_metadata_cap(id->mc, ns->devnum);
+
+	return 0;
+}
diff --git a/include/nvme.h b/include/nvme.h
index 3624408..8375d61 100644
--- a/include/nvme.h
+++ b/include/nvme.h
@@ -68,4 +68,15 @@ int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
  */
 int nvme_scan_namespace(void);
 
+/**
+ * nvme_print_info - print detailed NVMe controller and namespace information
+ *
+ * This prints out detailed human readable NVMe controller and namespace
+ * information which is very useful for debugging.
+ *
+ * @udev:	NVMe controller device
+ * @return:	0 on success, -EIO if NVMe identify command fails
+ */
+int nvme_print_info(struct udevice *udev);
+
 #endif /* __NVME_H__ */
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