/* * 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#define FRU_EEPROM_MADDR_INV    0xFFFFF 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 (atom_ctx && (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 (atom_ctx && 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 (atom_ctx && !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):	case IP_VERSION(13, 0, 14):			if (fru_addr)				*fru_addr = FRU_EEPROM_MADDR_8;			return true;	case IP_VERSION(13, 0, 12):	case IP_VERSION(15, 0, 8):			if (fru_addr)				*fru_addr = FRU_EEPROM_MADDR_INV;			return true;	default:		return false;	}} /* * IPMI FRU Product Info Area fields are TLV: one type/length byte * (low 6 bits = data length) followed by that many data bytes. These * helpers walk the cursor and copy a single field while bounding all * accesses to the actual buffer length read from the EEPROM. */#define FRU_FIELD_LEN(p, a)	((p)[a] & 0x3F) /* Advance cursor past the current TLV. Returns false if no more data. */static bool fru_pia_advance(u32 *addr, const unsigned char *pia, int len){	if (*addr >= (u32)len)		return false;	*addr += 1 + FRU_FIELD_LEN(pia, *addr);	return true;} /* * Copy the current TLV's data into dst (NUL-terminated). Returns false if * the TLV header or data would read past the end of pia. */static bool fru_pia_copy_field(char *dst, size_t dst_size,			       const unsigned char *pia, u32 addr, int len){	size_t fl; 	if (addr + 1 >= (u32)len)		return false; 	fl = min3((size_t)FRU_FIELD_LEN(pia, addr),			  dst_size - 1,			  (size_t)(len - addr - 1));	memcpy(dst, pia + addr + 1, fl);	dst[fl] = '\0';	return true;} 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; 	/* FRU data avaialble, but no direct EEPROM access */	if (fru_addr == FRU_EEPROM_MADDR_INV)		return 0; 	if (!adev->fru_info) {		adev->fru_info = kzalloc_obj(*adev->fru_info);		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) {		dev_warn(adev->dev,			 "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) {		dev_err(adev->dev, "Couldn't read the IPMI Common Header: %d",			len);		return len < 0 ? len : -EIO;	} 	if (buf[0] != 1) {		dev_err(adev->dev, "Bad IPMI Common Header version: 0x%02x",			buf[0]);		return -EIO;	} 	for (csum = 0; len > 0; len--)		csum += buf[len - 1];	if (csum) {		dev_err(adev->dev, "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) {		dev_err(adev->dev,			"Couldn't read the Product Info Area header: %d", len);		return len < 0 ? len : -EIO;	} 	if (buf[0] != 1) {		dev_err(adev->dev, "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);		dev_err(adev->dev, "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) {		dev_err(adev->dev, "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 (!fru_pia_copy_field(fru_info->manufacturer_name,				sizeof(fru_info->manufacturer_name),				pia, addr, len))		goto Out; 	/* Read Product Name field. */	if (!fru_pia_advance(&addr, pia, len) ||	    !fru_pia_copy_field(fru_info->product_name,				sizeof(fru_info->product_name),				pia, addr, len))		goto Out; 	/* Go to the Product Part/Model Number field. */	if (!fru_pia_advance(&addr, pia, len) ||	    !fru_pia_copy_field(fru_info->product_number,				sizeof(fru_info->product_number),				pia, addr, len))		goto Out; 	/* Skip the Product Version field. */	if (!fru_pia_advance(&addr, pia, len))		goto Out; 	/* Read the Product Serial Number field. */	if (!fru_pia_advance(&addr, pia, len) ||	    !fru_pia_copy_field(fru_info->serial,				sizeof(fru_info->serial),				pia, addr, len))		goto Out; 	/* Skip the Asset Tag field. */	if (!fru_pia_advance(&addr, pia, len))		goto Out; 	/* FRU File Id field. This could be 'null'. */	if (!fru_pia_advance(&addr, pia, len) ||	    !fru_pia_copy_field(fru_info->fru_id,				sizeof(fru_info->fru_id),				pia, addr, len))		goto Out; 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 (!adev->fru_info)		return; 	sysfs_remove_files(&adev->dev->kobj, amdgpu_fru_attributes);}