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From:   Scott Branden <scott.branden@broadcom.com>
To:     Arnd Bergmann <arnd@arndb.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Scott Branden <scott.branden@broadcom.com>
Cc:     Kees Cook <keescook@chromium.org>, linux-kernel@vger.kernel.org,
        bcm-kernel-feedback-list@broadcom.com,
        Desmond Yan <desmond.yan@broadcom.com>
Subject: [PATCH v5 12/15] misc: bcm-vk: add sysfs interface
Date:   Wed, 30 Sep 2020 18:28:07 -0700
Message-Id: <20201001012810.4172-13-scott.branden@broadcom.com>
In-Reply-To: <20201001012810.4172-1-scott.branden@broadcom.com>
References: <20201001012810.4172-1-scott.branden@broadcom.com>
Precedence: bulk

Add sysfs support to query the VK card status and monitor sense points.
The vk-card-status and vk-card-mon details are provided in the README
file in the bcm-vk driver directory.

Co-developed-by: Desmond Yan <desmond.yan@broadcom.com>
Signed-off-by: Desmond Yan <desmond.yan@broadcom.com>
Signed-off-by: Scott Branden <scott.branden@broadcom.com>
---
 drivers/misc/bcm-vk/Makefile       |    3 +-
 drivers/misc/bcm-vk/README         |   99 ++
 drivers/misc/bcm-vk/bcm_vk.h       |    2 +
 drivers/misc/bcm-vk/bcm_vk_dev.c   |    8 +
 drivers/misc/bcm-vk/bcm_vk_sysfs.c | 1411 ++++++++++++++++++++++++++++
 5 files changed, 1522 insertions(+), 1 deletion(-)
 create mode 100644 drivers/misc/bcm-vk/README
 create mode 100644 drivers/misc/bcm-vk/bcm_vk_sysfs.c

diff --git a/drivers/misc/bcm-vk/Makefile b/drivers/misc/bcm-vk/Makefile
index 79b4e365c9e6..5c4eb159567a 100644
--- a/drivers/misc/bcm-vk/Makefile
+++ b/drivers/misc/bcm-vk/Makefile
@@ -7,5 +7,6 @@ obj-$(CONFIG_BCM_VK) += bcm_vk.o
 bcm_vk-objs := \
 	bcm_vk_dev.o \
 	bcm_vk_msg.o \
-	bcm_vk_sg.o
+	bcm_vk_sg.o \
+	bcm_vk_sysfs.o
 
diff --git a/drivers/misc/bcm-vk/README b/drivers/misc/bcm-vk/README
new file mode 100644
index 000000000000..ba1a23f9fe17
--- /dev/null
+++ b/drivers/misc/bcm-vk/README
@@ -0,0 +1,99 @@
+Valkyrie Card Status using SysFS
+================================
+
+The bcm-vk driver supports the query of the Valkyrie card status or
+monitoring sense points using the SysFs entry.
+
+Two Group attributes are created for the valkyrie card;
+
+vk-card-status
+	- all card related status values.
+vk-card-mon
+	- card monitoring points.  Each entry under this group will report
+	a single value representing the particular measurement point value.
+
+The organization of the vk-card-status or vk-card-mon is given below.
+
+The group is created under the following :
+	/sysfs/devices/<pci device number>/
+Alternatively, these groups could be accessed through :
+	/sys/class/misc/bcm-vk.x/pci/
+, where x is the device id and "pci" is a symbolic link to the corresponding
+<pci device number> directory.
+
+vk-card-status/
+	bus			---> device PCIe bus
+	card_state		---> summary of current card states
+	chip_id
+	firmware_status		---> summary of all firmware status
+	firmware_version	---> summary of all firmware versions
+	freq_core_mhz		---> running frequency in mHz
+	freq_mem_mhz		---> memory frequency in mHz
+	mem_size_mb		---> memory size in MByte
+	os_state		---> current running state
+	reset_reason		---> last reset reason
+	rev_boot1		---> boot1 firmware revision
+	rev_boot2		---> boot2 firmware revision
+	rev_driver		---> host driver revision
+	rev_flash_rom		---> Flash ROM revision
+	sotp_boot1_rev_id	---> minimum boot1 revision required
+	sotp_boot2_rev_id	---> minimum boot2 revision required
+	sotp_dauth_1		---> authentication key hash
+	sotp_dauth_1_valid	---> authentication key validity
+	sotp_dauth_1_active_status -> authentication key active or not
+	sotp_dauth_2
+	sotp_dauth_2_valid
+	sotp_dauth_2_active_status
+	sotp_dauth_3
+	sotp_dauth_3_valid
+	sotp_dauth_3_active_status
+	sotp_dauth_4
+	sotp_dauth_4_valid
+	sotp_dauth_4_active_status
+	temp_threshold_lower_c	---> thermal low threshold in Celsius
+	temp_threshold_upper_c	---> thermal high threshold in Celsius
+	uptime_s		---> os up time in seconds
+
+vk-card-mon/
+	alert_afbc_busy		---> AFBC block stuck
+	alert_ecc		---> uncorrectable ECC error(s) occurred
+	alert_ecc_warn		---> correctable ECC error(s) occurred
+	alert_heartbeat_fail	---> host detects heartbeat discontinuation
+				     from card
+	alert_high_temp		---> high temperature threshold crossed
+	alert_intf_ver_fail	---> interface not compatible based on version
+	alert_low_temp_warn	---> low temperature threshold crossed
+	alert_malloc_fail_warn	---> mem allocation failure(s) occurred
+	alert_pcie_down		---> host detect pcie intf going down
+	alert_ssim_busy		---> ssim block busy
+	alert_sys_fault		---> system fault
+	alert_wdog_timeout	---> watchdog timeout
+	firmware_status_reg
+	mem_ecc			---> correctable ECC error count
+	mem_uecc		---> uncorrectable ECC error count
+	boot_status_reg		---> boot status of card
+	pwr_state		---> power state, 1-full, 2-reduced, 3-lowest
+	temperature_sensor_1_c	---> CPU die temperature in Celsius
+	temperature_sensor_2_c	---> DDR0 temperature in Celsius
+	temperature_sensor_3_c	---> DDR1 temperature in Celsius
+	utilization		---> runtime video transcoding consumption summary
+	utilization_pix 	---> percentage of pixel processing used
+	utilization_pix_used	---> pixel processing used
+	utilization_pix_max	---> max pixel processing value which maps 100% load
+	utilization_codec 	---> percentage of codec sessions used
+	utilization_codec_used	---> codec sessions currently used
+	utilization_codec_max	---> max codec sessions allowed
+	voltage_18_mv		---> 1.8v voltage rail in mv
+	voltage_33_mv		---> 3.3v voltage rail in mv
+
+The sysfs entry supports only the read operation.
+
+Example:
+To read the temperature from a PCIe device (bcm-vk.0) at 65:00.0:
+cat /sys/devices/pci0000:64/0000:64:00.0/0000:65:00.0/vk-mon-status/voltage_18_mv
+or
+cat /sys/class/misc/bcm-vk.0/pci/vk-mon-status/voltage_18_mv
+
+where
+	/sys/devices/pci0000:64/0000:64:00.0/0000:65:00.0/ --> path of bcm-vk device
+	vk-card-mon/voltage_18_mv --> current voltage reading from the card
diff --git a/drivers/misc/bcm-vk/bcm_vk.h b/drivers/misc/bcm-vk/bcm_vk.h
index 92251a56516f..0d47ef08c5c0 100644
--- a/drivers/misc/bcm-vk/bcm_vk.h
+++ b/drivers/misc/bcm-vk/bcm_vk.h
@@ -476,5 +476,7 @@ void bcm_vk_hb_deinit(struct bcm_vk *vk);
 void bcm_vk_handle_notf(struct bcm_vk *vk);
 bool bcm_vk_drv_access_ok(struct bcm_vk *vk);
 void bcm_vk_set_host_alert(struct bcm_vk *vk, u32 bit_mask);
+int bcm_vk_sysfs_init(struct pci_dev *pdev, struct miscdevice *misc_device);
+void bcm_vk_sysfs_exit(struct pci_dev *pdev, struct miscdevice *misc_device);
 
 #endif
diff --git a/drivers/misc/bcm-vk/bcm_vk_dev.c b/drivers/misc/bcm-vk/bcm_vk_dev.c
index 0ecf2b8e5e11..1e3abb4eadee 100644
--- a/drivers/misc/bcm-vk/bcm_vk_dev.c
+++ b/drivers/misc/bcm-vk/bcm_vk_dev.c
@@ -1381,6 +1381,10 @@ static int bcm_vk_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	/* sync other info */
 	bcm_vk_sync_card_info(vk);
 
+	err = bcm_vk_sysfs_init(pdev, misc_device);
+	if (err)
+		goto err_destroy_workqueue;
+
 	/* register for panic notifier */
 	vk->panic_nb.notifier_call = bcm_vk_on_panic;
 	err = atomic_notifier_chain_register(&panic_notifier_list,
@@ -1490,6 +1494,10 @@ static void bcm_vk_remove(struct pci_dev *pdev)
 	atomic_notifier_chain_unregister(&panic_notifier_list,
 					 &vk->panic_nb);
 
+	bcm_vk_sysfs_exit(pdev, misc_device);
+
+	bcm_vk_msg_remove(vk);
+
 	if (vk->tdma_vaddr)
 		dma_free_coherent(&pdev->dev, nr_scratch_pages * PAGE_SIZE,
 				  vk->tdma_vaddr, vk->tdma_addr);
diff --git a/drivers/misc/bcm-vk/bcm_vk_sysfs.c b/drivers/misc/bcm-vk/bcm_vk_sysfs.c
new file mode 100644
index 000000000000..061af90d9d20
--- /dev/null
+++ b/drivers/misc/bcm-vk/bcm_vk_sysfs.c
@@ -0,0 +1,1411 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2018-2020 Broadcom.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+
+#include "bcm_vk.h"
+
+#define BCM_VK_BITS_NOT_SET(val, bitmask) \
+		(((val) & (bitmask)) != (bitmask))
+
+#define BCM_VK_BUS_SYMLINK_NAME		"pci"
+
+enum proc_mon_type {
+	PROC_MON_PIXELS = 0, /**< aggregated pixels being processed */
+	PROC_MON_SESS, /**< decoder sessions used */
+	PROC_MON_TYPE_MAX
+};
+
+struct bcm_vk_sysfs_reg_list {
+	const u64 offset;
+	struct bcm_vk_entry const *tab;
+	const u32 size;
+	const char *hdr;
+};
+
+/*
+ * table structure for all shutdown related info in fw status register
+ */
+static struct bcm_vk_entry const fw_shutdown_reg_tab[] = {
+	{VK_FWSTS_APP_DEINIT_START, VK_FWSTS_APP_DEINIT_START,
+	 "app_deinit_st"},
+	{VK_FWSTS_APP_DEINIT_DONE, VK_FWSTS_APP_DEINIT_DONE,
+	 "app_deinited"},
+	{VK_FWSTS_DRV_DEINIT_START, VK_FWSTS_DRV_DEINIT_START,
+	 "drv_deinit_st"},
+	{VK_FWSTS_DRV_DEINIT_DONE, VK_FWSTS_DRV_DEINIT_DONE,
+	 "drv_deinited"},
+	{VK_FWSTS_RESET_DONE, VK_FWSTS_RESET_DONE,
+	 "reset_done"},
+	 /* reboot reason */
+	{VK_FWSTS_RESET_REASON_MASK, VK_FWSTS_RESET_SYS_PWRUP,
+	 "sys_pwrup"},
+	{VK_FWSTS_RESET_REASON_MASK, VK_FWSTS_RESET_MBOX_DB,
+	 "reset_doorbell"},
+	{VK_FWSTS_RESET_REASON_MASK, VK_FWSTS_RESET_M7_WDOG,
+	 "wdog"},
+	{VK_FWSTS_RESET_REASON_MASK, VK_FWSTS_RESET_TEMP,
+	 "overheat"},
+	{VK_FWSTS_RESET_REASON_MASK, VK_FWSTS_RESET_PCI_FLR,
+	 "pci_flr"},
+	{VK_FWSTS_RESET_REASON_MASK, VK_FWSTS_RESET_PCI_HOT,
+	 "pci_hot"},
+	{VK_FWSTS_RESET_REASON_MASK, VK_FWSTS_RESET_PCI_WARM,
+	 "pci_warm" },
+	{VK_FWSTS_RESET_REASON_MASK, VK_FWSTS_RESET_PCI_COLD,
+	 "pci_cold" },
+	{VK_FWSTS_RESET_REASON_MASK, VK_FWSTS_RESET_L1,
+	 "L1_reset" },
+	{VK_FWSTS_RESET_REASON_MASK, VK_FWSTS_RESET_L0,
+	 "L0_reset" },
+	{VK_FWSTS_RESET_REASON_MASK, VK_FWSTS_RESET_UNKNOWN,
+	 "unknown" },
+};
+
+/* define for the start of the reboot reason */
+#define FW_STAT_RB_REASON_START 5
+
+/* table for all fast boot register related items */
+static struct bcm_vk_entry const boot_reg_tab[] = {
+	/* download status */
+	{FW_LOADER_ACK_SEND_MORE_DATA, FW_LOADER_ACK_SEND_MORE_DATA,
+	 "bt1_needs_data"},
+	{FW_LOADER_ACK_IN_PROGRESS, FW_LOADER_ACK_IN_PROGRESS,
+	 "bt1_inprog"},
+	{FW_LOADER_ACK_RCVD_ALL_DATA, FW_LOADER_ACK_RCVD_ALL_DATA,
+	 "bt2_dload_done"},
+	{BOOT_STDALONE_RUNNING, BOOT_STDALONE_RUNNING, "standalone"},
+	/* running state */
+	{BOOT_STATE_MASK, BROM_NOT_RUN,  "ucode_not_run"},
+	{BOOT_STATE_MASK, BROM_RUNNING,  "wait_boot1"},
+	{BOOT_STATE_MASK, BOOT1_RUNNING, "wait_boot2"},
+	{BOOT_STATE_MASK, BOOT2_RUNNING, "boot2_running"},
+};
+
+/* define for the start of OS state */
+#define OS_STATE_START 3
+
+static int bcm_vk_sysfs_dump_reg(u32 reg_val,
+				 struct bcm_vk_entry const *entry_tab,
+				 const u32 table_size, char *buf)
+{
+	u32 i, masked_val;
+	struct bcm_vk_entry const *entry;
+	char *p_buf = buf;
+	int ret;
+
+	for (i = 0; i < table_size; i++) {
+		entry = &entry_tab[i];
+		masked_val = entry->mask & reg_val;
+		if (masked_val == entry->exp_val) {
+			ret = sprintf(p_buf, "  [0x%08x]    : %s\n",
+				      masked_val, entry->str);
+			if (ret < 0)
+				return ret;
+
+			p_buf += ret;
+		}
+	}
+
+	return (p_buf - buf);
+}
+
+static int sysfs_chk_fw_status(struct bcm_vk *vk, u32 mask,
+			       char *buf, const char *err_log)
+{
+	u32 fw_status;
+	int ret = 0;
+
+	/* if card OS is not running, no one will update the value */
+	fw_status = vkread32(vk, BAR_0, VK_BAR_FWSTS);
+	if (BCM_VK_INTF_IS_DOWN(fw_status))
+		return sprintf(buf, "PCIe Intf Down!\n");
+	else if (BCM_VK_BITS_NOT_SET(fw_status, mask))
+		return sprintf(buf, err_log);
+
+	return ret;
+}
+
+static int bcm_vk_sysfs_get_tag(struct bcm_vk *vk, enum pci_barno barno,
+				u32 offset, char *buf, const char *fmt)
+{
+	u32 magic;
+
+#define REL_MAGIC_TAG         0x68617368   /* this stands for "hash" */
+
+	magic = vkread32(vk, barno, offset);
+	return sprintf(buf, fmt, (magic == REL_MAGIC_TAG) ?
+		       (char *)(vk->bar[barno] + offset + sizeof(magic)) : "");
+}
+
+static ssize_t temperature_sensor_show(struct device *dev,
+				       struct device_attribute *devattr,
+				       char *buf,
+				       const char *tag,
+				       unsigned int offset)
+{
+	unsigned int temperature = 0; /* default if invalid */
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	temperature = vkread32(vk, BAR_0, BAR_CARD_TEMPERATURE);
+	temperature = (temperature >> offset) & BCM_VK_TEMP_FIELD_MASK;
+
+	dev_dbg(dev, "Temperature_%s : %u Celsius\n", tag, temperature);
+	return sprintf(buf, "%d\n", temperature);
+}
+
+static ssize_t temperature_sensor_1_c_show(struct device *dev,
+					   struct device_attribute *devattr,
+					   char *buf)
+{
+	return temperature_sensor_show(dev, devattr, buf, "CPU",
+				       BCM_VK_CPU_TEMP_SHIFT);
+}
+
+static ssize_t temperature_sensor_2_c_show(struct device *dev,
+					   struct device_attribute *devattr,
+					   char *buf)
+{
+	return temperature_sensor_show(dev, devattr, buf, "DDR0",
+				       BCM_VK_DDR0_TEMP_SHIFT);
+}
+
+static ssize_t temperature_sensor_3_c_show(struct device *dev,
+					   struct device_attribute *devattr,
+					   char *buf)
+{
+	return temperature_sensor_show(dev, devattr, buf, "DDR1",
+				       BCM_VK_DDR1_TEMP_SHIFT);
+}
+
+static ssize_t voltage_18_mv_show(struct device *dev,
+				  struct device_attribute *devattr, char *buf)
+{
+	unsigned int voltage;
+	unsigned int volt_1p8;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	voltage = vkread32(vk, BAR_0, BAR_CARD_VOLTAGE);
+	volt_1p8 = voltage & BCM_VK_VOLT_RAIL_MASK;
+
+	dev_dbg(dev, "[1.8v] : %u mV\n", volt_1p8);
+	return sprintf(buf, "%d\n", volt_1p8);
+}
+
+static ssize_t voltage_33_mv_show(struct device *dev,
+				  struct device_attribute *devattr, char *buf)
+{
+	unsigned int voltage;
+	unsigned int volt_3p3 = 0;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	voltage = vkread32(vk, BAR_0, BAR_CARD_VOLTAGE);
+	volt_3p3 = (voltage >> BCM_VK_3P3_VOLT_REG_SHIFT)
+		    & BCM_VK_VOLT_RAIL_MASK;
+
+	dev_dbg(dev, "[3.3v] : %u mV\n", volt_3p3);
+	return sprintf(buf, "%d\n", volt_3p3);
+}
+
+static ssize_t chip_id_show(struct device *dev,
+			    struct device_attribute *devattr, char *buf)
+{
+	u32 chip_id;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	chip_id = vkread32(vk, BAR_0, BAR_CHIP_ID);
+
+	return sprintf(buf, "0x%x\n", chip_id);
+}
+
+static ssize_t firmware_status_reg_show(struct device *dev,
+					struct device_attribute *devattr,
+					char *buf)
+{
+	u32 fw_status;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	fw_status = vkread32(vk, BAR_0, VK_BAR_FWSTS);
+
+	return sprintf(buf, "0x%x\n", fw_status);
+}
+
+static ssize_t boot_status_reg_show(struct device *dev,
+				    struct device_attribute *devattr,
+				    char *buf)
+{
+	u32 boot_status;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	boot_status = vkread32(vk, BAR_0, BAR_BOOT_STATUS);
+
+	return sprintf(buf, "0x%x\n", boot_status);
+}
+
+static ssize_t pwr_state_show(struct device *dev,
+			      struct device_attribute *devattr,
+			      char *buf)
+{
+	u32 card_pwr_and_thre;
+	u32 pwr_state;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	card_pwr_and_thre = vkread32(vk, BAR_0, BAR_CARD_PWR_AND_THRE);
+	BCM_VK_EXTRACT_FIELD(pwr_state, card_pwr_and_thre,
+			     BCM_VK_PWR_AND_THRE_FIELD_MASK,
+			     BCM_VK_PWR_STATE_SHIFT);
+
+	return sprintf(buf, "%u\n", pwr_state);
+}
+
+static ssize_t firmware_version_show(struct device *dev,
+				     struct device_attribute *devattr,
+				     char *buf)
+{
+	int count = 0;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+	u32 chip_id;
+	int ret;
+
+	/* Print driver version first, which is always available */
+	count  = sprintf(buf, "Driver  : %s %s, srcversion %s\n",
+			 DRV_MODULE_NAME, THIS_MODULE->version,
+			 THIS_MODULE->srcversion);
+
+	/* check for ucode and vk-boot1 versions */
+	count += bcm_vk_sysfs_get_tag(vk, BAR_1, VK_BAR1_UCODE_VER_TAG,
+				      &buf[count], "UCODE   : %s\n");
+	count += bcm_vk_sysfs_get_tag(vk, BAR_1, VK_BAR1_BOOT1_VER_TAG,
+				      &buf[count], "Boot1   : %s\n");
+
+	/* Check if FIRMWARE_STATUS_PRE_INIT_DONE for rest of items */
+	ret = sysfs_chk_fw_status(vk, FIRMWARE_STATUS_PRE_INIT_DONE,
+				  &buf[count],
+				  "FW Version: n/a (fw not running)\n");
+	if (ret)
+		return (ret + count);
+
+	/* retrieve chip id for display */
+	chip_id = vkread32(vk, BAR_0, BAR_CHIP_ID);
+	count += sprintf(&buf[count], "Chip id : 0x%x\n", chip_id);
+	count += sprintf(&buf[count], "Card os : %s\n", vk->card_info.os_tag);
+	return count;
+}
+
+static ssize_t rev_flash_rom_show(struct device *dev,
+				  struct device_attribute *devattr,
+				  char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return bcm_vk_sysfs_get_tag(vk, BAR_1, VK_BAR1_UCODE_VER_TAG,
+				    buf, "%s\n");
+}
+
+static ssize_t rev_boot1_show(struct device *dev,
+			      struct device_attribute *devattr,
+			      char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return bcm_vk_sysfs_get_tag(vk, BAR_1, VK_BAR1_BOOT1_VER_TAG,
+				    buf, "%s\n");
+}
+
+static ssize_t rev_boot2_show(struct device *dev,
+			      struct device_attribute *devattr,
+			      char *buf)
+{
+	int ret;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	/* Check if FIRMWARE_STATUS_PRE_INIT_DONE */
+	ret = sysfs_chk_fw_status(vk, FIRMWARE_STATUS_PRE_INIT_DONE,
+				  buf, "n/a\n");
+	if (ret)
+		return ret;
+
+	return sprintf(buf, "%s\n", vk->card_info.os_tag);
+}
+
+static ssize_t rev_driver_show(struct device *dev,
+			       struct device_attribute *devattr,
+			       char *buf)
+{
+	return sprintf(buf, "%s_%s-srcversion_%s\n",
+		       DRV_MODULE_NAME, THIS_MODULE->version,
+		       THIS_MODULE->srcversion);
+}
+
+static ssize_t firmware_status_show(struct device *dev,
+				    struct device_attribute *devattr, char *buf)
+{
+	int ret, i;
+	u32 reg_status;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+	char *p_buf = buf;
+	/*
+	 * for firmware status register, they are bit definitions,
+	 * so mask == exp_val
+	 */
+	static struct bcm_vk_entry const fw_status_reg_tab[] = {
+		{VK_FWSTS_RELOCATION_ENTRY, VK_FWSTS_RELOCATION_ENTRY,
+		 "relo_entry"},
+		{VK_FWSTS_RELOCATION_EXIT, VK_FWSTS_RELOCATION_EXIT,
+		 "relo_exit"},
+		{VK_FWSTS_INIT_START, VK_FWSTS_INIT_START,
+		 "init_st"},
+		{VK_FWSTS_ARCH_INIT_DONE, VK_FWSTS_ARCH_INIT_DONE,
+		 "arch_inited"},
+		{VK_FWSTS_PRE_KNL1_INIT_DONE, VK_FWSTS_PRE_KNL1_INIT_DONE,
+		 "pre_kern1_inited"},
+		{VK_FWSTS_PRE_KNL2_INIT_DONE, VK_FWSTS_PRE_KNL2_INIT_DONE,
+		  "pre_kern2_inited"},
+		{VK_FWSTS_POST_KNL_INIT_DONE, VK_FWSTS_POST_KNL_INIT_DONE,
+		  "kern_inited"},
+		{VK_FWSTS_INIT_DONE, VK_FWSTS_INIT_DONE,
+		 "card_os_inited"},
+		{VK_FWSTS_APP_INIT_START, VK_FWSTS_APP_INIT_START,
+		 "app_init_st"},
+		{VK_FWSTS_APP_INIT_DONE, VK_FWSTS_APP_INIT_DONE,
+		 "app_inited"},
+	};
+	/* list of registers */
+	static struct bcm_vk_sysfs_reg_list const fw_status_reg_list[] = {
+		{VK_BAR_FWSTS, fw_status_reg_tab,
+		 ARRAY_SIZE(fw_status_reg_tab),
+		 "FW status"},
+		{BAR_BOOT_STATUS, boot_reg_tab,
+		 ARRAY_SIZE(boot_reg_tab),
+		 "Boot status"},
+		{VK_BAR_FWSTS, fw_shutdown_reg_tab,
+		 ARRAY_SIZE(fw_shutdown_reg_tab),
+		 "Last Reset status"},
+		{VK_BAR_COP_FWSTS, fw_status_reg_tab,
+		 ARRAY_SIZE(fw_status_reg_tab),
+		 "FW status cop"},
+		{VK_BAR_COP_FWSTS, fw_shutdown_reg_tab,
+		 ARRAY_SIZE(fw_shutdown_reg_tab),
+		 "Last Reset status cop"},
+	};
+
+	reg_status = vkread32(vk, BAR_0, VK_BAR_FWSTS);
+	if (BCM_VK_INTF_IS_DOWN(reg_status))
+		return sprintf(buf, "PCIe Intf Down!\n");
+
+	for (i = 0; i < ARRAY_SIZE(fw_status_reg_list); i++) {
+		reg_status = vkread32(vk, BAR_0, fw_status_reg_list[i].offset);
+
+		dev_dbg(dev, "%s: 0x%08x\n",
+			fw_status_reg_list[i].hdr, reg_status);
+
+		ret = sprintf(p_buf, "%s: 0x%08x\n",
+			      fw_status_reg_list[i].hdr, reg_status);
+		if (ret < 0)
+			goto fw_status_show_fail;
+		p_buf += ret;
+
+		ret = bcm_vk_sysfs_dump_reg(reg_status,
+					    fw_status_reg_list[i].tab,
+					    fw_status_reg_list[i].size,
+					    p_buf);
+		if (ret < 0)
+			goto fw_status_show_fail;
+		p_buf += ret;
+	}
+
+	/* return total length written */
+	return (p_buf - buf);
+
+fw_status_show_fail:
+	return ret;
+}
+
+static ssize_t reset_reason_show(struct device *dev,
+				 struct device_attribute *devattr, char *buf)
+{
+	u32 reg, i;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+	static struct bcm_vk_entry const *tab =
+		&fw_shutdown_reg_tab[FW_STAT_RB_REASON_START];
+
+	reg = vkread32(vk, BAR_0, VK_BAR_FWSTS);
+	if (BCM_VK_INTF_IS_DOWN(reg))
+		return sprintf(buf, "PCIe Intf Down!\n");
+
+	for (i = 0;
+	     i < (ARRAY_SIZE(fw_shutdown_reg_tab) - FW_STAT_RB_REASON_START);
+	     i++) {
+		if ((tab[i].mask & reg) == tab[i].exp_val)
+			return sprintf(buf, "%s\n", tab[i].str);
+	}
+
+	return sprintf(buf, "invalid\n");
+}
+
+static ssize_t os_state_show(struct device *dev,
+			     struct device_attribute *devattr, char *buf)
+{
+	u32 reg, i;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	reg = vkread32(vk, BAR_0, VK_BAR_FWSTS);
+	if (BCM_VK_INTF_IS_DOWN(reg))
+		return sprintf(buf, "PCIe Intf Down!\n");
+
+	reg = vkread32(vk, BAR_0, BAR_BOOT_STATUS);
+	for (i = OS_STATE_START; i < ARRAY_SIZE(boot_reg_tab); i++) {
+		if ((boot_reg_tab[i].mask & reg) == boot_reg_tab[i].exp_val)
+			return sprintf(buf, "%s\n", boot_reg_tab[i].str);
+	}
+
+	return sprintf(buf, "invalid\n");
+}
+
+static ssize_t cop_state_show(struct device *dev,
+			      struct device_attribute *devattr, char *buf)
+{
+	u32 reg;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+#define VK_COP_FWSTS_READY (VK_FWSTS_RELOCATION_ENTRY | \
+			    VK_FWSTS_RELOCATION_EXIT | \
+			    VK_FWSTS_INIT_START | \
+			    VK_FWSTS_ARCH_INIT_DONE | \
+			    VK_FWSTS_PRE_KNL1_INIT_DONE | \
+			    VK_FWSTS_POST_KNL_INIT_DONE | \
+			    VK_FWSTS_INIT_DONE | \
+			    VK_FWSTS_APP_INIT_START | \
+			    VK_FWSTS_APP_INIT_DONE)
+#define VK_COP_FWSTS_READY_MASK ((VK_FWSTS_APP_INIT_DONE << 1) - 1)
+
+	reg = vkread32(vk, BAR_0, VK_BAR_COP_FWSTS);
+	if (BCM_VK_INTF_IS_DOWN(reg))
+		return sprintf(buf, "PCIe Intf Down!\n");
+	reg &= VK_COP_FWSTS_READY_MASK;
+
+	if (!reg)
+		return sprintf(buf, "%s\n", "disabled");
+	else if (reg == VK_COP_FWSTS_READY)
+		return sprintf(buf, "%s\n", "running");
+	else
+		return sprintf(buf, "%s\n", "boot_fail");
+}
+
+static ssize_t bus_show(struct device *dev,
+			struct device_attribute *devattr, char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+
+#define _BUS_NUM_FMT "%04x:%02x:%02x.%1d\n"
+	dev_dbg(dev, _BUS_NUM_FMT,
+		pci_domain_nr(pdev->bus), pdev->bus->number,
+		PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
+
+	return sprintf(buf, _BUS_NUM_FMT,
+		       pci_domain_nr(pdev->bus), pdev->bus->number,
+		       PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
+}
+
+static ssize_t card_state_show(struct device *dev,
+			       struct device_attribute *devattr, char *buf)
+{
+	int ret;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+	u32 reg;
+	u32 low_temp_thre, high_temp_thre, pwr_state;
+	u32 ecc_mem_err, uecc_mem_err;
+	char *p_buf = buf;
+	static const char * const pwr_state_tab[] = {
+		"Full", "Reduced", "Lowest"};
+	char *pwr_state_str;
+
+	/*
+	 * host detected alerts are available even if FW has gone down,
+	 * display first.
+	 */
+	reg = vk->host_alert.flags;
+	ret = sprintf(p_buf, "Host Alerts: 0x%08x\n", reg);
+	if (ret < 0)
+		goto card_state_show_fail;
+
+	dev_dbg(dev, "%s", p_buf);
+	p_buf += ret;
+
+	ret = bcm_vk_sysfs_dump_reg(reg,
+				    bcm_vk_host_err,
+				    ARRAY_SIZE(bcm_vk_host_err),
+				    p_buf);
+	if (ret < 0)
+		goto card_state_show_fail;
+	p_buf += ret;
+
+	/* next, see if there is any peer latched alert */
+	reg = vk->peer_alert.flags;
+	ret = sprintf(p_buf, "Peer Alerts: 0x%08x\n", reg);
+	if (ret < 0)
+		goto card_state_show_fail;
+
+	dev_dbg(dev, "%s", p_buf);
+	p_buf += ret;
+
+	ret = bcm_vk_sysfs_dump_reg(reg,
+				    bcm_vk_peer_err,
+				    ARRAY_SIZE(bcm_vk_peer_err),
+				    p_buf);
+	if (ret < 0)
+		goto card_state_show_fail;
+	p_buf += ret;
+
+	/* if OS is not running, no one will update the value */
+	ret = sysfs_chk_fw_status(vk, VK_FWSTS_READY, p_buf,
+				  "card_state: n/a (fw not running)\n");
+	if (ret) {
+		p_buf += ret;
+		return (p_buf - buf);
+	}
+
+	/* First, get power state and the threshold */
+	reg = vkread32(vk, BAR_0, BAR_CARD_PWR_AND_THRE);
+	BCM_VK_EXTRACT_FIELD(low_temp_thre, reg,
+			     BCM_VK_PWR_AND_THRE_FIELD_MASK,
+			     BCM_VK_LOW_TEMP_THRE_SHIFT);
+	BCM_VK_EXTRACT_FIELD(high_temp_thre, reg,
+			     BCM_VK_PWR_AND_THRE_FIELD_MASK,
+			     BCM_VK_HIGH_TEMP_THRE_SHIFT);
+	BCM_VK_EXTRACT_FIELD(pwr_state, reg,
+			     BCM_VK_PWR_AND_THRE_FIELD_MASK,
+			     BCM_VK_PWR_STATE_SHIFT);
+
+#define _PWR_AND_THRE_FMT "Pwr&Thre: 0x%08x\n"       \
+		"  [Pwr_state]     : %d (%s)\n"      \
+		"  [Low_thre]      : %d Celsius\n"   \
+		"  [High_thre]     : %d Celsius\n"
+
+	pwr_state_str = ((pwr_state - 1) < ARRAY_SIZE(pwr_state_tab)) ?
+			 (char *)pwr_state_tab[pwr_state - 1] : "n/a";
+	ret = sprintf(p_buf, _PWR_AND_THRE_FMT, reg, pwr_state, pwr_state_str,
+		      low_temp_thre, high_temp_thre);
+	if (ret < 0)
+		goto card_state_show_fail;
+	p_buf += ret;
+	dev_dbg(dev, _PWR_AND_THRE_FMT, reg, pwr_state, pwr_state_str,
+		low_temp_thre, high_temp_thre);
+
+	/* display memory error */
+	reg = vkread32(vk, BAR_0, BAR_CARD_ERR_MEM);
+	BCM_VK_EXTRACT_FIELD(ecc_mem_err, reg,
+			     BCM_VK_MEM_ERR_FIELD_MASK,
+			     BCM_VK_ECC_MEM_ERR_SHIFT);
+	BCM_VK_EXTRACT_FIELD(uecc_mem_err, reg,
+			     BCM_VK_MEM_ERR_FIELD_MASK,
+			     BCM_VK_UECC_MEM_ERR_SHIFT);
+
+#define _MEM_ERR_FMT "MemErr: 0x%08x\n"    \
+		"  [ECC]       : %d\n" \
+		"  [UECC]      : %d\n"
+	ret = sprintf(p_buf, _MEM_ERR_FMT, reg, ecc_mem_err, uecc_mem_err);
+	if (ret < 0)
+		goto card_state_show_fail;
+	p_buf += ret;
+	dev_dbg(dev, _MEM_ERR_FMT, reg, ecc_mem_err, uecc_mem_err);
+
+	return (p_buf - buf);
+
+card_state_show_fail:
+	return ret;
+}
+
+static ssize_t uptime_s_show(struct device *dev,
+			     struct device_attribute *devattr, char *buf)
+{
+	unsigned int uptime_s;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	uptime_s = vkread32(vk, BAR_0, BAR_OS_UPTIME);
+
+	dev_dbg(dev, "up_time : %u s\n", uptime_s);
+	return sprintf(buf, "%d\n", uptime_s);
+}
+
+static ssize_t mem_ecc_show(struct device *dev,
+			    struct device_attribute *devattr, char *buf)
+{
+	int ret;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+	u32 reg;
+	u32 ecc_mem_err;
+
+	/* if OS is not running, no one will update the value */
+	ret = sysfs_chk_fw_status(vk, VK_FWSTS_READY, buf, "0\n");
+	if (ret)
+		return ret;
+
+	/* display memory error */
+	reg = vkread32(vk, BAR_0, BAR_CARD_ERR_MEM);
+	BCM_VK_EXTRACT_FIELD(ecc_mem_err, reg,
+			     BCM_VK_MEM_ERR_FIELD_MASK,
+			     BCM_VK_ECC_MEM_ERR_SHIFT);
+
+	return sprintf(buf, "%d\n", ecc_mem_err);
+}
+
+static ssize_t mem_uecc_show(struct device *dev,
+			     struct device_attribute *devattr, char *buf)
+{
+	int ret;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+	u32 reg;
+	u32 uecc_mem_err;
+
+	/* if OS is not running, no one will update the value */
+	ret = sysfs_chk_fw_status(vk, VK_FWSTS_READY, buf, "0\n");
+	if (ret)
+		return ret;
+
+	/* display memory error */
+	reg = vkread32(vk, BAR_0, BAR_CARD_ERR_MEM);
+	BCM_VK_EXTRACT_FIELD(uecc_mem_err, reg,
+			     BCM_VK_MEM_ERR_FIELD_MASK,
+			     BCM_VK_UECC_MEM_ERR_SHIFT);
+
+	return sprintf(buf, "%d\n", uecc_mem_err);
+}
+
+static ssize_t sysfs_utilization_update(struct device *dev, char *buf,
+					enum proc_mon_type type,
+					struct bcm_vk_proc_mon_entry_t
+						**p_entryp)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+	struct bcm_vk_proc_mon_info *mon = &vk->proc_mon_info;
+	struct bcm_vk_proc_mon_entry_t *entry;
+	u32 offset;
+	int ret;
+
+	/* if OS is not running, no one will update the value */
+	ret = sysfs_chk_fw_status(vk, VK_FWSTS_READY, buf, "n/a\n");
+	if (ret)
+		return ret;
+
+	if (type >= mon->num)
+		return sprintf(buf, "n/a\n");
+
+	offset = vk->proc_mon_off +
+		 offsetof(struct bcm_vk_proc_mon_info, entries) +
+		 (type * mon->entry_size);
+
+	entry = &mon->entries[type];
+	entry->used = vkread32(vk, BAR_2,
+			       offset +
+			       offsetof(struct bcm_vk_proc_mon_entry_t,
+					used));
+	*p_entryp = entry;
+
+	return 0;
+}
+
+static ssize_t utilization_show(struct device *dev,
+				struct device_attribute *devattr, char *buf)
+{
+	int ret, i;
+	ssize_t cnt = 0;
+	struct bcm_vk_proc_mon_entry_t *entry;
+
+	for (i = 0; i < PROC_MON_TYPE_MAX; i++) {
+		ret = sysfs_utilization_update(dev, &buf[cnt], i, &entry);
+		if (ret)
+			return (ret + cnt);
+
+		cnt += sprintf(&buf[cnt], "%s (%d/%d) - %ld%%\n",
+			       entry->tag,
+			       entry->used,
+			       entry->max,
+			       entry->max ? (entry->used * 100L)
+					     / entry->max : 0);
+	}
+
+	return cnt;
+}
+
+static ssize_t utilization_pix_show(struct device *dev,
+				    struct device_attribute *devattr,
+				    char *buf)
+{
+	struct bcm_vk_proc_mon_entry_t *entry;
+	int ret;
+
+	ret = sysfs_utilization_update(dev, buf, PROC_MON_PIXELS, &entry);
+	if (ret)
+		return ret;
+
+	return sprintf(buf, "%ld\n",
+		       (entry->max) ? (entry->used * 100L) / entry->max : 0);
+}
+
+static ssize_t utilization_pix_used_show(struct device *dev,
+					 struct device_attribute *devattr,
+					 char *buf)
+{
+	struct bcm_vk_proc_mon_entry_t *entry;
+	int ret;
+
+	ret = sysfs_utilization_update(dev, buf, PROC_MON_PIXELS, &entry);
+	if (ret)
+		return ret;
+
+	return sprintf(buf, "%d\n", entry->used);
+}
+
+static ssize_t utilization_pix_max_show(struct device *dev,
+					struct device_attribute *devattr,
+					char *buf)
+{
+	struct bcm_vk_proc_mon_entry_t *entry;
+	int ret;
+
+	ret = sysfs_utilization_update(dev, buf, PROC_MON_PIXELS, &entry);
+	if (ret)
+		return ret;
+
+	return sprintf(buf, "%d\n", entry->max);
+}
+
+static ssize_t utilization_codec_show(struct device *dev,
+				      struct device_attribute *devattr,
+				      char *buf)
+{
+	struct bcm_vk_proc_mon_entry_t *entry;
+	int ret;
+
+	ret = sysfs_utilization_update(dev, buf, PROC_MON_SESS, &entry);
+	if (ret)
+		return ret;
+
+	return sprintf(buf, "%ld\n",
+		       (entry->max) ? (entry->used * 100L) / entry->max : 0);
+}
+
+static ssize_t utilization_codec_used_show(struct device *dev,
+					   struct device_attribute *devattr,
+					   char *buf)
+{
+	struct bcm_vk_proc_mon_entry_t *entry;
+	int ret;
+
+	ret = sysfs_utilization_update(dev, buf, PROC_MON_SESS, &entry);
+	if (ret)
+		return ret;
+
+	return sprintf(buf, "%d\n", entry->used);
+}
+
+static ssize_t utilization_codec_max_show(struct device *dev,
+					  struct device_attribute *devattr,
+					  char *buf)
+{
+	struct bcm_vk_proc_mon_entry_t *entry;
+	int ret;
+
+	ret = sysfs_utilization_update(dev, buf, PROC_MON_SESS, &entry);
+	if (ret)
+		return ret;
+
+	return sprintf(buf, "%d\n", entry->max);
+}
+
+static ssize_t peer_alert_show(struct device *dev, char *buf, const u16 flag)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return sprintf(buf, "%d\n", vk->peer_alert.flags & flag ? 1 : 0);
+}
+
+static ssize_t alert_ecc_show(struct device *dev,
+			      struct device_attribute *devattr, char *buf)
+{
+	return peer_alert_show(dev, buf, ERR_LOG_UECC);
+}
+
+static ssize_t alert_ssim_busy_show(struct device *dev,
+				    struct device_attribute *devattr, char *buf)
+{
+	return peer_alert_show(dev, buf, ERR_LOG_SSIM_BUSY);
+}
+
+static ssize_t alert_afbc_busy_show(struct device *dev,
+				    struct device_attribute *devattr, char *buf)
+{
+	return peer_alert_show(dev, buf, ERR_LOG_AFBC_BUSY);
+}
+
+static ssize_t alert_high_temp_show(struct device *dev,
+				    struct device_attribute *devattr, char *buf)
+{
+	return peer_alert_show(dev, buf, ERR_LOG_HIGH_TEMP_ERR);
+}
+
+static ssize_t alert_wdog_timeout_show(struct device *dev,
+				       struct device_attribute *devattr,
+				       char *buf)
+{
+	return peer_alert_show(dev, buf, ERR_LOG_WDOG_TIMEOUT);
+}
+
+static ssize_t alert_sys_fault_show(struct device *dev,
+				    struct device_attribute *devattr, char *buf)
+{
+	return peer_alert_show(dev, buf, ERR_LOG_SYS_FAULT);
+}
+
+static ssize_t alert_ramdump_show(struct device *dev,
+				  struct device_attribute *devattr, char *buf)
+{
+	return peer_alert_show(dev, buf, ERR_LOG_RAMDUMP);
+}
+
+static ssize_t alert_malloc_fail_warn_show(struct device *dev,
+					   struct device_attribute *devattr,
+					   char *buf)
+{
+	return peer_alert_show(dev, buf, ERR_LOG_MEM_ALLOC_FAIL);
+}
+
+static ssize_t alert_low_temp_warn_show(struct device *dev,
+					struct device_attribute *devattr,
+					char *buf)
+{
+	return peer_alert_show(dev, buf, ERR_LOG_LOW_TEMP_WARN);
+}
+
+static ssize_t alert_ecc_warn_show(struct device *dev,
+				   struct device_attribute *devattr,
+				   char *buf)
+{
+	return peer_alert_show(dev, buf, ERR_LOG_ECC);
+}
+
+static ssize_t host_alert_show(struct device *dev, char *buf, const u16 flag)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return sprintf(buf, "%d\n", vk->host_alert.flags & flag ? 1 : 0);
+}
+
+static ssize_t alert_pcie_down_show(struct device *dev,
+				    struct device_attribute *devattr, char *buf)
+{
+	return host_alert_show(dev, buf, ERR_LOG_HOST_PCIE_DWN);
+}
+
+static ssize_t alert_heartbeat_fail_show(struct device *dev,
+					 struct device_attribute *devattr,
+					 char *buf)
+{
+	return host_alert_show(dev, buf, ERR_LOG_HOST_HB_FAIL);
+}
+
+static ssize_t alert_intf_ver_fail_show(struct device *dev,
+					struct device_attribute *devattr,
+					char *buf)
+{
+	return host_alert_show(dev, buf, ERR_LOG_HOST_INTF_V_FAIL);
+}
+
+static ssize_t temp_threshold_lower_c_show(struct device *dev,
+					   struct device_attribute *devattr,
+					   char *buf)
+{
+	int ret;
+	u32 low_temp_thre;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+	u32 reg;
+
+	ret = sysfs_chk_fw_status(vk, VK_FWSTS_READY, buf, "0\n");
+	if (ret)
+		return ret;
+
+	reg = vkread32(vk, BAR_0, BAR_CARD_PWR_AND_THRE);
+	BCM_VK_EXTRACT_FIELD(low_temp_thre, reg,
+			     BCM_VK_PWR_AND_THRE_FIELD_MASK,
+			     BCM_VK_LOW_TEMP_THRE_SHIFT);
+
+	return sprintf(buf, "%d\n", low_temp_thre);
+}
+
+static ssize_t temp_threshold_upper_c_show(struct device *dev,
+					   struct device_attribute *devattr,
+					   char *buf)
+{
+	int ret;
+	u32 high_temp_thre;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+	u32 reg;
+
+	ret = sysfs_chk_fw_status(vk, VK_FWSTS_READY, buf, "0\n");
+	if (ret)
+		return ret;
+
+	reg = vkread32(vk, BAR_0, BAR_CARD_PWR_AND_THRE);
+	BCM_VK_EXTRACT_FIELD(high_temp_thre, reg,
+			     BCM_VK_PWR_AND_THRE_FIELD_MASK,
+			     BCM_VK_HIGH_TEMP_THRE_SHIFT);
+
+	return sprintf(buf, "%d\n", high_temp_thre);
+}
+
+static ssize_t freq_core_mhz_show(struct device *dev,
+				  struct device_attribute *devattr,
+				  char *buf)
+{
+	u32 card_pwr_and_thre;
+	u32 pwr_state;
+	u32 scale_f = 0;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+	struct bcm_vk_card_info *info = &vk->card_info;
+
+	card_pwr_and_thre = vkread32(vk, BAR_0, BAR_CARD_PWR_AND_THRE);
+	BCM_VK_EXTRACT_FIELD(pwr_state, card_pwr_and_thre,
+			     BCM_VK_PWR_AND_THRE_FIELD_MASK,
+			     BCM_VK_PWR_STATE_SHIFT);
+
+	if (pwr_state && (pwr_state <= MAX_OPP))
+		scale_f = info->cpu_scale[pwr_state - 1];
+
+	return sprintf(buf, "%d\n",
+		       info->cpu_freq_mhz / (scale_f ? scale_f : 1));
+}
+
+static ssize_t freq_mem_mhz_show(struct device *dev,
+				 struct device_attribute *devattr,
+				 char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+	struct bcm_vk_card_info *info = &vk->card_info;
+
+	return sprintf(buf, "%d\n", info->ddr_freq_mhz);
+}
+
+static ssize_t mem_size_mb_show(struct device *dev,
+				struct device_attribute *devattr,
+				char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+	struct bcm_vk_card_info *info = &vk->card_info;
+
+	return sprintf(buf, "%d\n", info->ddr_size_MB);
+}
+
+static ssize_t sotp_common_show(struct device *dev,
+				struct device_attribute *devattr,
+				char *buf, u32 tag_offset)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return bcm_vk_sysfs_get_tag(vk, BAR_1, tag_offset, buf, "%s\n");
+}
+
+static const char *sotp_dauth_active(struct bcm_vk *vk, u32 idx)
+{
+	int i;
+	struct bcm_vk_dauth_info *info = &vk->dauth_info;
+
+	for (i = 0; i < idx; i++)
+		/* if anything below is active, this is inactive */
+		if (!strcmp(info->keys[i].valid, "1"))
+			return "0";
+	/*
+	 * when reaching here, all belows are non-active, so return
+	 * based on current key's valid value
+	 */
+	if (!strcmp(info->keys[i].valid, "1"))
+		return "1";
+	else
+		return "0";
+}
+
+static ssize_t sotp_dauth_1_show(struct device *dev,
+				 struct device_attribute *devattr, char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return sprintf(buf, "%s\n", vk->dauth_info.keys[0].store);
+}
+
+static ssize_t sotp_dauth_1_valid_show(struct device *dev,
+				       struct device_attribute *devattr,
+				       char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return sprintf(buf, "%s\n", vk->dauth_info.keys[0].valid);
+}
+
+static ssize_t sotp_dauth_1_active_status_show(struct device *dev,
+					       struct device_attribute *devattr,
+					       char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return sprintf(buf, "%s\n", sotp_dauth_active(vk, 0));
+}
+
+static ssize_t sotp_dauth_2_show(struct device *dev,
+				 struct device_attribute *devattr, char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return sprintf(buf, "%s\n", vk->dauth_info.keys[1].store);
+}
+
+static ssize_t sotp_dauth_2_valid_show(struct device *dev,
+				       struct device_attribute *devattr,
+				       char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return sprintf(buf, "%s\n", vk->dauth_info.keys[1].valid);
+}
+
+static ssize_t sotp_dauth_2_active_status_show(struct device *dev,
+					       struct device_attribute *devattr,
+					       char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return sprintf(buf, "%s\n", sotp_dauth_active(vk, 1));
+}
+
+static ssize_t sotp_dauth_3_show(struct device *dev,
+				 struct device_attribute *devattr, char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return sprintf(buf, "%s\n", vk->dauth_info.keys[2].store);
+}
+
+static ssize_t sotp_dauth_3_valid_show(struct device *dev,
+				       struct device_attribute *devattr,
+				       char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return sprintf(buf, "%s\n", vk->dauth_info.keys[2].valid);
+}
+
+static ssize_t sotp_dauth_3_active_status_show(struct device *dev,
+					       struct device_attribute *devattr,
+					       char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return sprintf(buf, "%s\n", sotp_dauth_active(vk, 2));
+}
+
+static ssize_t sotp_dauth_4_show(struct device *dev,
+				 struct device_attribute *devattr, char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return sprintf(buf, "%s\n", vk->dauth_info.keys[3].store);
+}
+
+static ssize_t sotp_dauth_4_valid_show(struct device *dev,
+				       struct device_attribute *devattr,
+				       char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return sprintf(buf, "%s\n", vk->dauth_info.keys[3].valid);
+}
+
+static ssize_t sotp_dauth_4_active_status_show(struct device *dev,
+					       struct device_attribute *devattr,
+					       char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+
+	return sprintf(buf, "%s\n", sotp_dauth_active(vk, 3));
+}
+
+static ssize_t sotp_boot1_rev_id_show(struct device *dev,
+				      struct device_attribute *devattr,
+				      char *buf)
+{
+	return sotp_common_show(dev, devattr, buf,
+				VK_BAR1_SOTP_REVID_ADDR(0));
+}
+
+static ssize_t sotp_boot2_rev_id_show(struct device *dev,
+				      struct device_attribute *devattr,
+				      char *buf)
+{
+	return sotp_common_show(dev, devattr, buf,
+				VK_BAR1_SOTP_REVID_ADDR(1));
+}
+
+static void bcm_vk_get_dauth_info(struct bcm_vk *vk)
+{
+	struct device *dev = &vk->pdev->dev;
+	struct bcm_vk_dauth_info *info = &vk->dauth_info;
+	int i;
+
+	for (i = 0; i < VK_BAR1_DAUTH_MAX; i++) {
+		bcm_vk_sysfs_get_tag(vk, BAR_1, VK_BAR1_DAUTH_STORE_ADDR(i),
+				     info->keys[i].store, "%s");
+		bcm_vk_sysfs_get_tag(vk, BAR_1, VK_BAR1_DAUTH_VALID_ADDR(i),
+				     info->keys[i].valid, "%s");
+		dev_dbg(dev, "[%d]: %s valid %s\n", i,
+			info->keys[i].store, info->keys[i].valid);
+	}
+}
+
+static DEVICE_ATTR_RO(firmware_status);
+static DEVICE_ATTR_RO(reset_reason);
+static DEVICE_ATTR_RO(os_state);
+static DEVICE_ATTR_RO(cop_state);
+static DEVICE_ATTR_RO(firmware_version);
+static DEVICE_ATTR_RO(rev_flash_rom);
+static DEVICE_ATTR_RO(rev_boot1);
+static DEVICE_ATTR_RO(rev_boot2);
+static DEVICE_ATTR_RO(rev_driver);
+static DEVICE_ATTR_RO(bus);
+static DEVICE_ATTR_RO(card_state);
+static DEVICE_ATTR_RO(uptime_s);
+static DEVICE_ATTR_RO(mem_ecc);
+static DEVICE_ATTR_RO(mem_uecc);
+static DEVICE_ATTR_RO(utilization);
+static DEVICE_ATTR_RO(utilization_pix);
+static DEVICE_ATTR_RO(utilization_pix_used);
+static DEVICE_ATTR_RO(utilization_pix_max);
+static DEVICE_ATTR_RO(utilization_codec);
+static DEVICE_ATTR_RO(utilization_codec_used);
+static DEVICE_ATTR_RO(utilization_codec_max);
+static DEVICE_ATTR_RO(alert_ecc);
+static DEVICE_ATTR_RO(alert_ssim_busy);
+static DEVICE_ATTR_RO(alert_afbc_busy);
+static DEVICE_ATTR_RO(alert_high_temp);
+static DEVICE_ATTR_RO(alert_wdog_timeout);
+static DEVICE_ATTR_RO(alert_sys_fault);
+static DEVICE_ATTR_RO(alert_ramdump);
+static DEVICE_ATTR_RO(alert_malloc_fail_warn);
+static DEVICE_ATTR_RO(alert_low_temp_warn);
+static DEVICE_ATTR_RO(alert_ecc_warn);
+static DEVICE_ATTR_RO(alert_pcie_down);
+static DEVICE_ATTR_RO(alert_heartbeat_fail);
+static DEVICE_ATTR_RO(alert_intf_ver_fail);
+static DEVICE_ATTR_RO(temp_threshold_lower_c);
+static DEVICE_ATTR_RO(temp_threshold_upper_c);
+static DEVICE_ATTR_RO(freq_core_mhz);
+static DEVICE_ATTR_RO(freq_mem_mhz);
+static DEVICE_ATTR_RO(mem_size_mb);
+static DEVICE_ATTR_RO(sotp_dauth_1);
+static DEVICE_ATTR_RO(sotp_dauth_1_valid);
+static DEVICE_ATTR_RO(sotp_dauth_1_active_status);
+static DEVICE_ATTR_RO(sotp_dauth_2);
+static DEVICE_ATTR_RO(sotp_dauth_2_valid);
+static DEVICE_ATTR_RO(sotp_dauth_2_active_status);
+static DEVICE_ATTR_RO(sotp_dauth_3);
+static DEVICE_ATTR_RO(sotp_dauth_3_valid);
+static DEVICE_ATTR_RO(sotp_dauth_3_active_status);
+static DEVICE_ATTR_RO(sotp_dauth_4);
+static DEVICE_ATTR_RO(sotp_dauth_4_valid);
+static DEVICE_ATTR_RO(sotp_dauth_4_active_status);
+static DEVICE_ATTR_RO(sotp_boot1_rev_id);
+static DEVICE_ATTR_RO(sotp_boot2_rev_id);
+static DEVICE_ATTR_RO(temperature_sensor_1_c);
+static DEVICE_ATTR_RO(temperature_sensor_2_c);
+static DEVICE_ATTR_RO(temperature_sensor_3_c);
+static DEVICE_ATTR_RO(voltage_18_mv);
+static DEVICE_ATTR_RO(voltage_33_mv);
+static DEVICE_ATTR_RO(chip_id);
+static DEVICE_ATTR_RO(firmware_status_reg);
+static DEVICE_ATTR_RO(boot_status_reg);
+static DEVICE_ATTR_RO(pwr_state);
+
+static struct attribute *bcm_vk_card_stat_attributes[] = {
+	&dev_attr_chip_id.attr,
+	&dev_attr_firmware_status.attr,
+	&dev_attr_reset_reason.attr,
+	&dev_attr_os_state.attr,
+	&dev_attr_cop_state.attr,
+	&dev_attr_firmware_version.attr,
+	&dev_attr_rev_flash_rom.attr,
+	&dev_attr_rev_boot1.attr,
+	&dev_attr_rev_boot2.attr,
+	&dev_attr_rev_driver.attr,
+	&dev_attr_bus.attr,
+	&dev_attr_card_state.attr,
+	&dev_attr_uptime_s.attr,
+	&dev_attr_temp_threshold_lower_c.attr,
+	&dev_attr_temp_threshold_upper_c.attr,
+	&dev_attr_freq_core_mhz.attr,
+	&dev_attr_freq_mem_mhz.attr,
+	&dev_attr_mem_size_mb.attr,
+	&dev_attr_sotp_dauth_1.attr,
+	&dev_attr_sotp_dauth_1_valid.attr,
+	&dev_attr_sotp_dauth_1_active_status.attr,
+	&dev_attr_sotp_dauth_2.attr,
+	&dev_attr_sotp_dauth_2_valid.attr,
+	&dev_attr_sotp_dauth_2_active_status.attr,
+	&dev_attr_sotp_dauth_3.attr,
+	&dev_attr_sotp_dauth_3_valid.attr,
+	&dev_attr_sotp_dauth_3_active_status.attr,
+	&dev_attr_sotp_dauth_4.attr,
+	&dev_attr_sotp_dauth_4_valid.attr,
+	&dev_attr_sotp_dauth_4_active_status.attr,
+	&dev_attr_sotp_boot1_rev_id.attr,
+	&dev_attr_sotp_boot2_rev_id.attr,
+	NULL,
+};
+
+static struct attribute *bcm_vk_card_mon_attributes[] = {
+	&dev_attr_temperature_sensor_1_c.attr,
+	&dev_attr_temperature_sensor_2_c.attr,
+	&dev_attr_temperature_sensor_3_c.attr,
+	&dev_attr_voltage_18_mv.attr,
+	&dev_attr_voltage_33_mv.attr,
+	&dev_attr_firmware_status_reg.attr,
+	&dev_attr_boot_status_reg.attr,
+	&dev_attr_pwr_state.attr,
+	&dev_attr_mem_ecc.attr,
+	&dev_attr_mem_uecc.attr,
+	&dev_attr_utilization.attr,
+	&dev_attr_utilization_pix.attr,
+	&dev_attr_utilization_pix_used.attr,
+	&dev_attr_utilization_pix_max.attr,
+	&dev_attr_utilization_codec.attr,
+	&dev_attr_utilization_codec_used.attr,
+	&dev_attr_utilization_codec_max.attr,
+	&dev_attr_alert_ecc.attr,
+	&dev_attr_alert_ssim_busy.attr,
+	&dev_attr_alert_afbc_busy.attr,
+	&dev_attr_alert_high_temp.attr,
+	&dev_attr_alert_wdog_timeout.attr,
+	&dev_attr_alert_sys_fault.attr,
+	&dev_attr_alert_ramdump.attr,
+	&dev_attr_alert_malloc_fail_warn.attr,
+	&dev_attr_alert_low_temp_warn.attr,
+	&dev_attr_alert_ecc_warn.attr,
+	&dev_attr_alert_pcie_down.attr,
+	&dev_attr_alert_heartbeat_fail.attr,
+	&dev_attr_alert_intf_ver_fail.attr,
+	NULL,
+};
+
+static const struct attribute_group bcm_vk_card_stat_attribute_group = {
+	.name = "vk-card-status",
+	.attrs = bcm_vk_card_stat_attributes,
+};
+
+static const struct attribute_group bcm_vk_card_mon_attribute_group = {
+	.name = "vk-card-mon",
+	.attrs = bcm_vk_card_mon_attributes,
+};
+
+int bcm_vk_sysfs_init(struct pci_dev *pdev, struct miscdevice *misc_device)
+{
+	struct device *dev = &pdev->dev;
+	struct bcm_vk *vk = pci_get_drvdata(pdev);
+	int rc;
+
+	dev_dbg(dev, "create sysfs group for bcm-vk\n");
+	rc = sysfs_create_group(&pdev->dev.kobj,
+				&bcm_vk_card_stat_attribute_group);
+	if (rc < 0) {
+		dev_err(dev, "failed to create card status attr\n");
+		goto err_sysfs_exit;
+	}
+	rc = sysfs_create_group(&pdev->dev.kobj,
+				&bcm_vk_card_mon_attribute_group);
+	if (rc < 0) {
+		dev_err(dev, "failed to create card mon attr\n");
+		goto err_free_card_stat_group;
+	}
+
+	/* create symbolic link from misc device to bus directory */
+	rc = sysfs_create_link(&misc_device->this_device->kobj,
+			       &pdev->dev.kobj, BCM_VK_BUS_SYMLINK_NAME);
+	if (rc < 0) {
+		dev_err(dev, "failed to create symlink\n");
+		goto err_free_card_mon_group;
+	}
+	/* create symbolic link from bus to misc device also */
+	rc = sysfs_create_link(&pdev->dev.kobj,
+			       &misc_device->this_device->kobj,
+			       misc_device->name);
+	if (rc < 0) {
+		dev_err(dev, "failed to create reverse symlink\n");
+		goto err_free_sysfs_entry;
+	}
+
+	/* read dauth info */
+	bcm_vk_get_dauth_info(vk);
+
+	return 0;
+
+err_free_sysfs_entry:
+	sysfs_remove_link(&misc_device->this_device->kobj,
+			  BCM_VK_BUS_SYMLINK_NAME);
+
+err_free_card_mon_group:
+	sysfs_remove_group(&pdev->dev.kobj, &bcm_vk_card_mon_attribute_group);
+err_free_card_stat_group:
+	sysfs_remove_group(&pdev->dev.kobj, &bcm_vk_card_stat_attribute_group);
+
+err_sysfs_exit:
+	return rc;
+}
+
+void bcm_vk_sysfs_exit(struct pci_dev *pdev, struct miscdevice *misc_device)
+{
+	/* remove the sysfs entry and symlinks associated */
+	sysfs_remove_link(&pdev->dev.kobj, misc_device->name);
+	sysfs_remove_link(&misc_device->this_device->kobj,
+			  BCM_VK_BUS_SYMLINK_NAME);
+	sysfs_remove_group(&pdev->dev.kobj, &bcm_vk_card_mon_attribute_group);
+	sysfs_remove_group(&pdev->dev.kobj, &bcm_vk_card_stat_attribute_group);
+}
-- 
2.17.1