drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c - linux - Git at Google

 /*
  * Copyright 2019 Advanced Micro Devices, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  */
 #include <linux/pci.h>

 #include "amdgpu.h"
 #include "amdgpu_i2c.h"
 #include "smu_v11_0_i2c.h"
 #include "atom.h"
 #include "amdgpu_fru_eeprom.h"
 #include "amdgpu_eeprom.h"

 #define FRU_EEPROM_MADDR_6      0x60000
 #define FRU_EEPROM_MADDR_8      0x80000

 static bool is_fru_eeprom_supported(struct amdgpu_device *adev, u32 *fru_addr)
 {
 	/* Only server cards have the FRU EEPROM
 	 * TODO: See if we can figure this out dynamically instead of
 	 * having to parse VBIOS versions.
 	 */
 	struct atom_context *atom_ctx = adev->mode_info.atom_context;

 	/* The i2c access is blocked on VF
 	 * TODO: Need other way to get the info
 	 * Also, FRU not valid for APU devices.
 	 */
 	if (amdgpu_sriov_vf(adev) || (adev->flags & AMD_IS_APU))
 		return false;

 	/* The default I2C EEPROM address of the FRU.
 	 */
 	if (fru_addr)
 		*fru_addr = FRU_EEPROM_MADDR_8;

 	/* VBIOS is of the format ###-DXXXYYYY-##. For SKU identification,
 	 * we can use just the "DXXX" portion. If there were more models, we
 	 * could convert the 3 characters to a hex integer and use a switch
 	 * for ease/speed/readability. For now, 2 string comparisons are
 	 * reasonable and not too expensive
 	 */
 	switch (amdgpu_ip_version(adev, MP1_HWIP, 0)) {
 	case IP_VERSION(11, 0, 2):
 		switch (adev->asic_type) {
 		case CHIP_VEGA20:
 			/* D161 and D163 are the VG20 server SKUs */
 			if (strnstr(atom_ctx->vbios_pn, "D161",
 				    sizeof(atom_ctx->vbios_pn)) ||
 			    strnstr(atom_ctx->vbios_pn, "D163",
 				    sizeof(atom_ctx->vbios_pn))) {
 				if (fru_addr)
 					*fru_addr = FRU_EEPROM_MADDR_6;
 				return true;
 			} else {
 				return false;
 			}
 		case CHIP_ARCTURUS:
 		default:
 			return false;
 		}
 	case IP_VERSION(11, 0, 7):
 		if (strnstr(atom_ctx->vbios_pn, "D603",
 			    sizeof(atom_ctx->vbios_pn))) {
 			if (strnstr(atom_ctx->vbios_pn, "D603GLXE",
 				    sizeof(atom_ctx->vbios_pn))) {
 				return false;
 			}

 			if (fru_addr)
 				*fru_addr = FRU_EEPROM_MADDR_6;
 			return true;

 		} else {
 			return false;
 		}
 	case IP_VERSION(13, 0, 2):
 		/* All Aldebaran SKUs have an FRU */
 		if (!strnstr(atom_ctx->vbios_pn, "D673",
 			     sizeof(atom_ctx->vbios_pn)))
 			if (fru_addr)
 				*fru_addr = FRU_EEPROM_MADDR_6;
 		return true;
 	case IP_VERSION(13, 0, 6):
 			if (fru_addr)
 				*fru_addr = FRU_EEPROM_MADDR_8;
 			return true;
 	default:
 		return false;
 	}
 }

 int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
 {
 	struct amdgpu_fru_info *fru_info;
 	unsigned char buf[8], *pia;
 	u32 addr, fru_addr;
 	int size, len;
 	u8 csum;

 	if (!is_fru_eeprom_supported(adev, &fru_addr))
 		return 0;

 	if (!adev->fru_info) {
 		adev->fru_info = kzalloc(sizeof(*adev->fru_info), GFP_KERNEL);
 		if (!adev->fru_info)
 			return -ENOMEM;
 	}

 	fru_info = adev->fru_info;
 	/* For Arcturus-and-later, default value of serial_number is unique_id
 	 * so convert it to a 16-digit HEX string for convenience and
 	 * backwards-compatibility.
 	 */
 	sprintf(fru_info->serial, "%llx", adev->unique_id);

 	/* If algo exists, it means that the i2c_adapter's initialized */
 	if (!adev->pm.fru_eeprom_i2c_bus || !adev->pm.fru_eeprom_i2c_bus->algo) {
 		DRM_WARN("Cannot access FRU, EEPROM accessor not initialized");
 		return -ENODEV;
 	}

 	/* Read the IPMI Common header */
 	len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, fru_addr, buf,
 				 sizeof(buf));
 	if (len != 8) {
 		DRM_ERROR("Couldn't read the IPMI Common Header: %d", len);
 		return len < 0 ? len : -EIO;
 	}

 	if (buf[0] != 1) {
 		DRM_ERROR("Bad IPMI Common Header version: 0x%02x", buf[0]);
 		return -EIO;
 	}

 	for (csum = 0; len > 0; len--)
 		csum += buf[len - 1];
 	if (csum) {
 		DRM_ERROR("Bad IPMI Common Header checksum: 0x%02x", csum);
 		return -EIO;
 	}

 	/* Get the offset to the Product Info Area (PIA). */
 	addr = buf[4] * 8;
 	if (!addr)
 		return 0;

 	/* Get the absolute address to the PIA. */
 	addr += fru_addr;

 	/* Read the header of the PIA. */
 	len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addr, buf, 3);
 	if (len != 3) {
 		DRM_ERROR("Couldn't read the Product Info Area header: %d", len);
 		return len < 0 ? len : -EIO;
 	}

 	if (buf[0] != 1) {
 		DRM_ERROR("Bad IPMI Product Info Area version: 0x%02x", buf[0]);
 		return -EIO;
 	}

 	size = buf[1] * 8;
 	pia = kzalloc(size, GFP_KERNEL);
 	if (!pia)
 		return -ENOMEM;

 	/* Read the whole PIA. */
 	len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addr, pia, size);
 	if (len != size) {
 		kfree(pia);
 		DRM_ERROR("Couldn't read the Product Info Area: %d", len);
 		return len < 0 ? len : -EIO;
 	}

 	for (csum = 0; size > 0; size--)
 		csum += pia[size - 1];
 	if (csum) {
 		DRM_ERROR("Bad Product Info Area checksum: 0x%02x", csum);
 		kfree(pia);
 		return -EIO;
 	}

 	/* Now extract useful information from the PIA.
 	 *
 	 * Read Manufacturer Name field whose length is [3].
 	 */
 	addr = 3;
 	if (addr + 1 >= len)
 		goto Out;
 	memcpy(fru_info->manufacturer_name, pia + addr + 1,
 	       min_t(size_t, sizeof(fru_info->manufacturer_name),
 		     pia[addr] & 0x3F));
 	fru_info->manufacturer_name[sizeof(fru_info->manufacturer_name) - 1] =
 		'\0';

 	/* Read Product Name field. */
 	addr += 1 + (pia[addr] & 0x3F);
 	if (addr + 1 >= len)
 		goto Out;
 	memcpy(fru_info->product_name, pia + addr + 1,
 	       min_t(size_t, sizeof(fru_info->product_name), pia[addr] & 0x3F));
 	fru_info->product_name[sizeof(fru_info->product_name) - 1] = '\0';

 	/* Go to the Product Part/Model Number field. */
 	addr += 1 + (pia[addr] & 0x3F);
 	if (addr + 1 >= len)
 		goto Out;
 	memcpy(fru_info->product_number, pia + addr + 1,
 	       min_t(size_t, sizeof(fru_info->product_number),
 		     pia[addr] & 0x3F));
 	fru_info->product_number[sizeof(fru_info->product_number) - 1] = '\0';

 	/* Go to the Product Version field. */
 	addr += 1 + (pia[addr] & 0x3F);

 	/* Go to the Product Serial Number field. */
 	addr += 1 + (pia[addr] & 0x3F);
 	if (addr + 1 >= len)
 		goto Out;
 	memcpy(fru_info->serial, pia + addr + 1,
 	       min_t(size_t, sizeof(fru_info->serial), pia[addr] & 0x3F));
 	fru_info->serial[sizeof(fru_info->serial) - 1] = '\0';

 	/* Asset Tag field */
 	addr += 1 + (pia[addr] & 0x3F);

 	/* FRU File Id field. This could be 'null'. */
 	addr += 1 + (pia[addr] & 0x3F);
 	if ((addr + 1 >= len) || !(pia[addr] & 0x3F))
 		goto Out;
 	memcpy(fru_info->fru_id, pia + addr + 1,
 	       min_t(size_t, sizeof(fru_info->fru_id), pia[addr] & 0x3F));
 	fru_info->fru_id[sizeof(fru_info->fru_id) - 1] = '\0';

 Out:
 	kfree(pia);
 	return 0;
 }

 /**
  * DOC: product_name
  *
  * The amdgpu driver provides a sysfs API for reporting the product name
  * for the device
  * The file product_name is used for this and returns the product name
  * as returned from the FRU.
  * NOTE: This is only available for certain server cards
  */

 static ssize_t amdgpu_fru_product_name_show(struct device *dev,
 					    struct device_attribute *attr,
 					    char *buf)
 {
 	struct drm_device *ddev = dev_get_drvdata(dev);
 	struct amdgpu_device *adev = drm_to_adev(ddev);

 	return sysfs_emit(buf, "%s\n", adev->fru_info->product_name);
 }

 static DEVICE_ATTR(product_name, 0444, amdgpu_fru_product_name_show, NULL);

 /**
  * DOC: product_number
  *
  * The amdgpu driver provides a sysfs API for reporting the part number
  * for the device
  * The file product_number is used for this and returns the part number
  * as returned from the FRU.
  * NOTE: This is only available for certain server cards
  */

 static ssize_t amdgpu_fru_product_number_show(struct device *dev,
 					      struct device_attribute *attr,
 					      char *buf)
 {
 	struct drm_device *ddev = dev_get_drvdata(dev);
 	struct amdgpu_device *adev = drm_to_adev(ddev);

 	return sysfs_emit(buf, "%s\n", adev->fru_info->product_number);
 }

 static DEVICE_ATTR(product_number, 0444, amdgpu_fru_product_number_show, NULL);

 /**
  * DOC: serial_number
  *
  * The amdgpu driver provides a sysfs API for reporting the serial number
  * for the device
  * The file serial_number is used for this and returns the serial number
  * as returned from the FRU.
  * NOTE: This is only available for certain server cards
  */

 static ssize_t amdgpu_fru_serial_number_show(struct device *dev,
 					     struct device_attribute *attr,
 					     char *buf)
 {
 	struct drm_device *ddev = dev_get_drvdata(dev);
 	struct amdgpu_device *adev = drm_to_adev(ddev);

 	return sysfs_emit(buf, "%s\n", adev->fru_info->serial);
 }

 static DEVICE_ATTR(serial_number, 0444, amdgpu_fru_serial_number_show, NULL);

 /**
  * DOC: fru_id
  *
  * The amdgpu driver provides a sysfs API for reporting FRU File Id
  * for the device.
  * The file fru_id is used for this and returns the File Id value
  * as returned from the FRU.
  * NOTE: This is only available for certain server cards
  */

 static ssize_t amdgpu_fru_id_show(struct device *dev,
 				  struct device_attribute *attr, char *buf)
 {
 	struct drm_device *ddev = dev_get_drvdata(dev);
 	struct amdgpu_device *adev = drm_to_adev(ddev);

 	return sysfs_emit(buf, "%s\n", adev->fru_info->fru_id);
 }

 static DEVICE_ATTR(fru_id, 0444, amdgpu_fru_id_show, NULL);

 /**
  * DOC: manufacturer
  *
  * The amdgpu driver provides a sysfs API for reporting manufacturer name from
  * FRU information.
  * The file manufacturer returns the value as returned from the FRU.
  * NOTE: This is only available for certain server cards
  */

 static ssize_t amdgpu_fru_manufacturer_name_show(struct device *dev,
 						 struct device_attribute *attr,
 						 char *buf)
 {
 	struct drm_device *ddev = dev_get_drvdata(dev);
 	struct amdgpu_device *adev = drm_to_adev(ddev);

 	return sysfs_emit(buf, "%s\n", adev->fru_info->manufacturer_name);
 }

 static DEVICE_ATTR(manufacturer, 0444, amdgpu_fru_manufacturer_name_show, NULL);

 static const struct attribute *amdgpu_fru_attributes[] = {
 	&dev_attr_product_name.attr,
 	&dev_attr_product_number.attr,
 	&dev_attr_serial_number.attr,
 	&dev_attr_fru_id.attr,
 	&dev_attr_manufacturer.attr,
 	NULL
 };

 int amdgpu_fru_sysfs_init(struct amdgpu_device *adev)
 {
 	if (!is_fru_eeprom_supported(adev, NULL) || !adev->fru_info)
 		return 0;

 	return sysfs_create_files(&adev->dev->kobj, amdgpu_fru_attributes);
 }

 void amdgpu_fru_sysfs_fini(struct amdgpu_device *adev)
 {
 	if (!is_fru_eeprom_supported(adev, NULL) || !adev->fru_info)
 		return;

 	sysfs_remove_files(&adev->dev->kobj, amdgpu_fru_attributes);
 }
	/*
	* Copyright 2019 Advanced Micro Devices, Inc.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	* OTHER DEALINGS IN THE SOFTWARE.
	*
	*/
	#include <linux/pci.h>

	#include "amdgpu.h"
	#include "amdgpu_i2c.h"
	#include "smu_v11_0_i2c.h"
	#include "atom.h"
	#include "amdgpu_fru_eeprom.h"
	#include "amdgpu_eeprom.h"

	#define FRU_EEPROM_MADDR_6 0x60000
	#define FRU_EEPROM_MADDR_8 0x80000

	static bool is_fru_eeprom_supported(struct amdgpu_device adev, u32 fru_addr)
	{
	/* Only server cards have the FRU EEPROM
	* TODO: See if we can figure this out dynamically instead of
	* having to parse VBIOS versions.
	*/
	struct atom_context *atom_ctx = adev->mode_info.atom_context;

	/* The i2c access is blocked on VF
	* TODO: Need other way to get the info
	* Also, FRU not valid for APU devices.
	*/
	if (amdgpu_sriov_vf(adev) \|\| (adev->flags & AMD_IS_APU))
	return false;

	/* The default I2C EEPROM address of the FRU.
	*/
	if (fru_addr)
	*fru_addr = FRU_EEPROM_MADDR_8;

	/* VBIOS is of the format ###-DXXXYYYY-##. For SKU identification,
	* we can use just the "DXXX" portion. If there were more models, we
	* could convert the 3 characters to a hex integer and use a switch
	* for ease/speed/readability. For now, 2 string comparisons are
	* reasonable and not too expensive
	*/
	switch (amdgpu_ip_version(adev, MP1_HWIP, 0)) {
	case IP_VERSION(11, 0, 2):
	switch (adev->asic_type) {
	case CHIP_VEGA20:
	/* D161 and D163 are the VG20 server SKUs */
	if (strnstr(atom_ctx->vbios_pn, "D161",
	sizeof(atom_ctx->vbios_pn)) \|\|
	strnstr(atom_ctx->vbios_pn, "D163",
	sizeof(atom_ctx->vbios_pn))) {
	if (fru_addr)
	*fru_addr = FRU_EEPROM_MADDR_6;
	return true;
	} else {
	return false;
	}
	case CHIP_ARCTURUS:
	default:
	return false;
	}
	case IP_VERSION(11, 0, 7):
	if (strnstr(atom_ctx->vbios_pn, "D603",
	sizeof(atom_ctx->vbios_pn))) {
	if (strnstr(atom_ctx->vbios_pn, "D603GLXE",
	sizeof(atom_ctx->vbios_pn))) {
	return false;
	}

	if (fru_addr)
	*fru_addr = FRU_EEPROM_MADDR_6;
	return true;

	} else {
	return false;
	}
	case IP_VERSION(13, 0, 2):
	/* All Aldebaran SKUs have an FRU */
	if (!strnstr(atom_ctx->vbios_pn, "D673",
	sizeof(atom_ctx->vbios_pn)))
	if (fru_addr)
	*fru_addr = FRU_EEPROM_MADDR_6;
	return true;
	case IP_VERSION(13, 0, 6):
	if (fru_addr)
	*fru_addr = FRU_EEPROM_MADDR_8;
	return true;
	default:
	return false;
	}
	}

	int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
	{
	struct amdgpu_fru_info *fru_info;
	unsigned char buf[8], *pia;
	u32 addr, fru_addr;
	int size, len;
	u8 csum;

	if (!is_fru_eeprom_supported(adev, &fru_addr))
	return 0;

	if (!adev->fru_info) {
	adev->fru_info = kzalloc(sizeof(*adev->fru_info), GFP_KERNEL);
	if (!adev->fru_info)
	return -ENOMEM;
	}

	fru_info = adev->fru_info;
	/* For Arcturus-and-later, default value of serial_number is unique_id
	* so convert it to a 16-digit HEX string for convenience and
	* backwards-compatibility.
	*/
	sprintf(fru_info->serial, "%llx", adev->unique_id);

	/* If algo exists, it means that the i2c_adapter's initialized */
	if (!adev->pm.fru_eeprom_i2c_bus \|\| !adev->pm.fru_eeprom_i2c_bus->algo) {
	DRM_WARN("Cannot access FRU, EEPROM accessor not initialized");
	return -ENODEV;
	}

	/* Read the IPMI Common header */
	len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, fru_addr, buf,
	sizeof(buf));
	if (len != 8) {
	DRM_ERROR("Couldn't read the IPMI Common Header: %d", len);
	return len < 0 ? len : -EIO;
	}

	if (buf[0] != 1) {
	DRM_ERROR("Bad IPMI Common Header version: 0x%02x", buf[0]);
	return -EIO;
	}

	for (csum = 0; len > 0; len--)
	csum += buf[len - 1];
	if (csum) {
	DRM_ERROR("Bad IPMI Common Header checksum: 0x%02x", csum);
	return -EIO;
	}

	/* Get the offset to the Product Info Area (PIA). */
	addr = buf[4] * 8;
	if (!addr)
	return 0;

	/* Get the absolute address to the PIA. */
	addr += fru_addr;

	/* Read the header of the PIA. */
	len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addr, buf, 3);
	if (len != 3) {
	DRM_ERROR("Couldn't read the Product Info Area header: %d", len);
	return len < 0 ? len : -EIO;
	}

	if (buf[0] != 1) {
	DRM_ERROR("Bad IPMI Product Info Area version: 0x%02x", buf[0]);
	return -EIO;
	}

	size = buf[1] * 8;
	pia = kzalloc(size, GFP_KERNEL);
	if (!pia)
	return -ENOMEM;

	/* Read the whole PIA. */
	len = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addr, pia, size);
	if (len != size) {
	kfree(pia);
	DRM_ERROR("Couldn't read the Product Info Area: %d", len);
	return len < 0 ? len : -EIO;
	}

	for (csum = 0; size > 0; size--)
	csum += pia[size - 1];
	if (csum) {
	DRM_ERROR("Bad Product Info Area checksum: 0x%02x", csum);
	kfree(pia);
	return -EIO;
	}

	/* Now extract useful information from the PIA.
	*
	* Read Manufacturer Name field whose length is [3].
	*/
	addr = 3;
	if (addr + 1 >= len)
	goto Out;
	memcpy(fru_info->manufacturer_name, pia + addr + 1,
	min_t(size_t, sizeof(fru_info->manufacturer_name),
	pia[addr] & 0x3F));
	fru_info->manufacturer_name[sizeof(fru_info->manufacturer_name) - 1] =
	'\0';

	/* Read Product Name field. */
	addr += 1 + (pia[addr] & 0x3F);
	if (addr + 1 >= len)
	goto Out;
	memcpy(fru_info->product_name, pia + addr + 1,
	min_t(size_t, sizeof(fru_info->product_name), pia[addr] & 0x3F));
	fru_info->product_name[sizeof(fru_info->product_name) - 1] = '\0';

	/* Go to the Product Part/Model Number field. */
	addr += 1 + (pia[addr] & 0x3F);
	if (addr + 1 >= len)
	goto Out;
	memcpy(fru_info->product_number, pia + addr + 1,
	min_t(size_t, sizeof(fru_info->product_number),
	pia[addr] & 0x3F));
	fru_info->product_number[sizeof(fru_info->product_number) - 1] = '\0';

	/* Go to the Product Version field. */
	addr += 1 + (pia[addr] & 0x3F);

	/* Go to the Product Serial Number field. */
	addr += 1 + (pia[addr] & 0x3F);
	if (addr + 1 >= len)
	goto Out;
	memcpy(fru_info->serial, pia + addr + 1,
	min_t(size_t, sizeof(fru_info->serial), pia[addr] & 0x3F));
	fru_info->serial[sizeof(fru_info->serial) - 1] = '\0';

	/* Asset Tag field */
	addr += 1 + (pia[addr] & 0x3F);

	/* FRU File Id field. This could be 'null'. */
	addr += 1 + (pia[addr] & 0x3F);
	if ((addr + 1 >= len) \|\| !(pia[addr] & 0x3F))
	goto Out;
	memcpy(fru_info->fru_id, pia + addr + 1,
	min_t(size_t, sizeof(fru_info->fru_id), pia[addr] & 0x3F));
	fru_info->fru_id[sizeof(fru_info->fru_id) - 1] = '\0';

	Out:
	kfree(pia);
	return 0;
	}

	/**
	* DOC: product_name
	*
	* The amdgpu driver provides a sysfs API for reporting the product name
	* for the device
	* The file product_name is used for this and returns the product name
	* as returned from the FRU.
	* NOTE: This is only available for certain server cards
	*/

	static ssize_t amdgpu_fru_product_name_show(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct drm_device *ddev = dev_get_drvdata(dev);
	struct amdgpu_device *adev = drm_to_adev(ddev);

	return sysfs_emit(buf, "%s\n", adev->fru_info->product_name);
	}

	static DEVICE_ATTR(product_name, 0444, amdgpu_fru_product_name_show, NULL);

	/**
	* DOC: product_number
	*
	* The amdgpu driver provides a sysfs API for reporting the part number
	* for the device
	* The file product_number is used for this and returns the part number
	* as returned from the FRU.
	* NOTE: This is only available for certain server cards
	*/

	static ssize_t amdgpu_fru_product_number_show(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct drm_device *ddev = dev_get_drvdata(dev);
	struct amdgpu_device *adev = drm_to_adev(ddev);

	return sysfs_emit(buf, "%s\n", adev->fru_info->product_number);
	}

	static DEVICE_ATTR(product_number, 0444, amdgpu_fru_product_number_show, NULL);

	/**
	* DOC: serial_number
	*
	* The amdgpu driver provides a sysfs API for reporting the serial number
	* for the device
	* The file serial_number is used for this and returns the serial number
	* as returned from the FRU.
	* NOTE: This is only available for certain server cards
	*/

	static ssize_t amdgpu_fru_serial_number_show(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct drm_device *ddev = dev_get_drvdata(dev);
	struct amdgpu_device *adev = drm_to_adev(ddev);

	return sysfs_emit(buf, "%s\n", adev->fru_info->serial);
	}

	static DEVICE_ATTR(serial_number, 0444, amdgpu_fru_serial_number_show, NULL);

	/**
	* DOC: fru_id
	*
	* The amdgpu driver provides a sysfs API for reporting FRU File Id
	* for the device.
	* The file fru_id is used for this and returns the File Id value
	* as returned from the FRU.
	* NOTE: This is only available for certain server cards
	*/

	static ssize_t amdgpu_fru_id_show(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct drm_device *ddev = dev_get_drvdata(dev);
	struct amdgpu_device *adev = drm_to_adev(ddev);

	return sysfs_emit(buf, "%s\n", adev->fru_info->fru_id);
	}

	static DEVICE_ATTR(fru_id, 0444, amdgpu_fru_id_show, NULL);

	/**
	* DOC: manufacturer
	*
	* The amdgpu driver provides a sysfs API for reporting manufacturer name from
	* FRU information.
	* The file manufacturer returns the value as returned from the FRU.
	* NOTE: This is only available for certain server cards
	*/

	static ssize_t amdgpu_fru_manufacturer_name_show(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct drm_device *ddev = dev_get_drvdata(dev);
	struct amdgpu_device *adev = drm_to_adev(ddev);

	return sysfs_emit(buf, "%s\n", adev->fru_info->manufacturer_name);
	}

	static DEVICE_ATTR(manufacturer, 0444, amdgpu_fru_manufacturer_name_show, NULL);

	static const struct attribute *amdgpu_fru_attributes[] = {
	&dev_attr_product_name.attr,
	&dev_attr_product_number.attr,
	&dev_attr_serial_number.attr,
	&dev_attr_fru_id.attr,
	&dev_attr_manufacturer.attr,
	NULL
	};

	int amdgpu_fru_sysfs_init(struct amdgpu_device *adev)
	{
	if (!is_fru_eeprom_supported(adev, NULL) \|\| !adev->fru_info)
	return 0;

	return sysfs_create_files(&adev->dev->kobj, amdgpu_fru_attributes);
	}

	void amdgpu_fru_sysfs_fini(struct amdgpu_device *adev)
	{
	if (!is_fru_eeprom_supported(adev, NULL) \|\| !adev->fru_info)
	return;

	sysfs_remove_files(&adev->dev->kobj, amdgpu_fru_attributes);
	}