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/*
* 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
*/
if (amdgpu_sriov_vf(adev))
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 (adev->asic_type) {
case CHIP_VEGA20:
/* D161 and D163 are the VG20 server SKUs */
if (strnstr(atom_ctx->vbios_version, "D161",
sizeof(atom_ctx->vbios_version)) ||
strnstr(atom_ctx->vbios_version, "D163",
sizeof(atom_ctx->vbios_version))) {
*fru_addr = FRU_EEPROM_MADDR_6;
return true;
} else {
return false;
}
case CHIP_ALDEBARAN:
/* All Aldebaran SKUs have an FRU */
if (!strnstr(atom_ctx->vbios_version, "D673",
sizeof(atom_ctx->vbios_version)))
if (fru_addr)
*fru_addr = FRU_EEPROM_MADDR_6;
return true;
case CHIP_SIENNA_CICHLID:
if (strnstr(atom_ctx->vbios_version, "D603",
sizeof(atom_ctx->vbios_version))) {
if (strnstr(atom_ctx->vbios_version, "D603GLXE",
sizeof(atom_ctx->vbios_version))) {
return false;
} else {
*fru_addr = FRU_EEPROM_MADDR_6;
return true;
}
} else {
return false;
}
default:
return false;
}
}
int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
{
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 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);
return -EIO;
}
/* Now extract useful information from the PIA.
*
* Skip the Manufacturer Name at [3] and go directly to
* the Product Name field.
*/
addr = 3 + 1 + (pia[3] & 0x3F);
if (addr + 1 >= len)
goto Out;
memcpy(adev->product_name, pia + addr + 1,
min_t(size_t,
sizeof(adev->product_name),
pia[addr] & 0x3F));
adev->product_name[sizeof(adev->product_name) - 1] = '\0';
/* Go to the Product Part/Model Number field. */
addr += 1 + (pia[addr] & 0x3F);
if (addr + 1 >= len)
goto Out;
memcpy(adev->product_number, pia + addr + 1,
min_t(size_t,
sizeof(adev->product_number),
pia[addr] & 0x3F));
adev->product_number[sizeof(adev->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(adev->serial, pia + addr + 1, min_t(size_t,
sizeof(adev->serial),
pia[addr] & 0x3F));
adev->serial[sizeof(adev->serial) - 1] = '\0';
Out:
kfree(pia);
return 0;
}
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