drm/amdgpu: Avoid FRU EEPROM access on APU

FRU EEPROM access is not valid for APU devices.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Yang Wang <kevinyang.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Documentation/amdgpu: Add FRU attribute details

Add documentation for the newly added manufacturer and fru_id attributes
in sysfs.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Add more FRU field information

Add support to read Manufacturer Name and FRU File Id fields. Also add
sysfs device attributes for external usage.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Refactor FRU product information

Keep FRU related information together in a separate structure.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: enable FRU device for SMU v13.0.6

v1:
enable GFX v9.4.3 FRU device to query board information.

v2:
use MP1 version to identify different asic

Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Fix a memory leak

Fix a memory leak in amdgpu_fru_get_product_info().

Cc: Alex Deucher <Alexander.Deucher@amd.com>
Reported-by: Yang Wang <kevinyang.wang@amd.com>
Fixes: 0dbf2c562625 ("drm/amdgpu: Interpret IPMI data for product information (v2)")
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Fix a memory leak

Fix a memory leak in amdgpu_fru_get_product_info().

Cc: Alex Deucher <Alexander.Deucher@amd.com>
Reported-by: Yang Wang <kevinyang.wang@amd.com>
Fixes: 0dbf2c562625 ("drm/amdgpu: Interpret IPMI data for product information (v2)")
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Add FRU sysfs nodes only if needed

Create sysfs nodes for FRU data only if FRU data is available. Move the
logic to FRU specific file.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Remove else after return in 'is_fru_eeprom_supported'

Expressions under 'else' branch under case 'CHIP_SIENNA_CICHLID' in
function 'is_fru_eeprom_supported' are executed whenever the expression
in 'if' is False. Otherwise, return from case occurs. Therefore, there
is no need in 'else', and it has been removed.

Fixes the following:

WARNING: else is not generally useful after a break or return
+ return false;
+ } else {

Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Guchun Chen <guchun.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amd: Avoid reading the VBIOS part number twice

The VBIOS part number is read both in amdgpu_atom_parse() as well
as in atom_get_vbios_pn() and stored twice in the `struct atom_context`
structure. Remove the first unnecessary read and move the `pr_info`
line from that read into the second.

v2: squash in unused variable removal

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Check if fru_addr is not NULL (v2)

Always check if fru_addr is not NULL. This commit also fixes a "smatch"
warning.

v2: Add a Fixes tag.

Cc: Alex Deucher <Alexander.Deucher@amd.com>
Cc: Dan Carpenter <error27@gmail.com>
Cc: kernel test robot <lkp@intel.com>
Cc: AMD Graphics <amd-gfx@lists.freedesktop.org>
Fixes: afbe5d1e4bd7c7 ("drm/amdgpu: Bug-fix: Reading I2C FRU data on newer ASICs")
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Interpret IPMI data for product information (v2)

Don't assume FRU MCU memory locations for the FRU data fields, or their sizes,
instead read and interpret the IPMI data, as stipulated in the IPMI spec
version 1.0 rev 1.2.

Extract the Product Name, Product Part/Model Number, and the Product Serial
Number by interpreting the IPMI data.

Check the checksums of the stored IPMI data to make sure we don't read and
give corrupted data back the the user.

Eliminate small I2C reads, and instead read the whole Product Info Area in one
go, and then extract the information we're seeking from it.

Eliminates a whole function, making this file smaller.

v2: Clarify changes in the commit message.

Cc: Alex Deucher <Alexander.Deucher@amd.com>
Cc: Kent Russell <kent.russell@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Tested-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Bug-fix: Reading I2C FRU data on newer ASICs

Set the new correct default FRU MCU I2C address for newer ASICs, so that we
can correctly read the Product Name, Product Part/Model Number and Serial
Number.

On newer ASICs, the FRU MCU was moved to I2C address 0x58.

Cc: Alex Deucher <Alexander.Deucher@amd.com>
Cc: Kent Russell <kent.russell@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Tested-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: disable FRU access on special SIENNA CICHLID card

Below driver load error will be printed, not friendly to end user.

amdgpu: ATOM BIOS: 113-D603GLXE-077
[drm] FRU: Failed to get size field
[drm:amdgpu_fru_get_product_info [amdgpu]] *ERROR* Failed to read FRU Manufacturer, ret:-5

Signed-off-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: disable FRU access on special SIENNA CICHLID card

Below driver load error will be printed, not friendly to end user.

amdgpu: ATOM BIOS: 113-D603GLXE-077
[drm] FRU: Failed to get size field
[drm:amdgpu_fru_get_product_info [amdgpu]] *ERROR* Failed to read FRU Manufacturer, ret:-5

Signed-off-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Prevent random memory access in FRU code

Prevent random memory access in the FRU EEPROM code by passing the size of
the destination buffer to the reading routine, and reading no more than the
size of the buffer.

Cc: Kent Russell <kent.russell@amd.com>
Cc: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Reviewed-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Don't offset by 2 in FRU EEPROM

Read buffers no longer expose the I2C address, and so we don't need to
offset by two when we get the read data.

Cc: Alex Deucher <Alexander.Deucher@amd.com>
Cc: Kent Russell <kent.russell@amd.com>
Cc: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Fixes: bd607166af7fe3 ("drm/amdgpu: Enable reading FRU chip via I2C v3")
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Reviewed-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Nerf "buff" to "buf"

Buffer is abbreviated "buf" (buf-fer), not "buff" (buff-er).
This is consistent with the rest of the kernel code.

Cc: Kent Russell <kent.russell@amd.com>
Cc: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Reviewed-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amd: Enable FRU EEPROM for Sienna Cichlid

Enable the FRU EEPROM I2C bus for Sienna Cichlid
server boards, for which it is enabled by checking
the VBIOS version.

Cc: Roy Sun <Roy.Sun@amd.com>
Cc: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amd: Expose the FRU SMU I2C bus

Expose both SMU I2C buses. Some boards use the same bus for both the RAS
and FRU EEPROMs and others use different buses. This enables the
additional I2C bus and sets the right buses to use for RAS and FRU EEPROM
access.

Cc: Roy Sun <Roy.Sun@amd.com>
Co-developed-by: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Disable FRU EEPROM access for SRIOV

VF acces the EEPROM is blocked by security policy, we might need other way
to get SKUs info for VF

v2: squash in compilation fix from Luben

Signed-off-by: shaoyunl <shaoyun.liu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Access the FRU on Aldebaran

This is supported, although the offset is different from VG20, so fix
that with a variable and enable getting the product name and serial
number from the FRU. Do this for all SKUs since all SKUs have the FRU

Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Increase potential product_name to 64 characters

Having seen at least 1 42-character product_name, bump the number up to
64, and put that definition into amdgpu.h to make future adjustments
simpler.

Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: EEPROM: add explicit read and write

Add explicit amdgpu_eeprom_read() and
amdgpu_eeprom_write() for clarity.

Cc: Jean Delvare <jdelvare@suse.de>
Cc: Alexander Deucher <Alexander.Deucher@amd.com>
Cc: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Cc: Lijo Lazar <Lijo.Lazar@amd.com>
Cc: Stanley Yang <Stanley.Yang@amd.com>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Alexander Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: RAS and FRU now use 19-bit I2C address

Convert RAS and FRU code to use the 19-bit I2C
memory address and remove all "slave_addr", as
this is now absolved into the 19-bit address.

Cc: Jean Delvare <jdelvare@suse.de>
Cc: John Clements <john.clements@amd.com>
Cc: Alexander Deucher <Alexander.Deucher@amd.com>
Cc: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Cc: Lijo Lazar <Lijo.Lazar@amd.com>
Cc: Stanley Yang <Stanley.Yang@amd.com>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Alexander Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: i2c subsystem uses 7 bit addresses

Convert from 8 bit to 7 bit.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>

drm/amdgpu/ras: switch fru eeprom handling to use generic helper (v2)

Use the new helper rather than doing i2c transfers directly.

v2: fix typo

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>

drm/amdgpu: refine amdgpu_fru_get_product_info

1. eliminate potential array index out of bounds.
2. return meaningful value for failure.

Signed-off-by: Jiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: Jack Gui <Jack.Gui@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: refine amdgpu_fru_get_product_info

1. eliminate potential array index out of bounds.
2. return meaningful value for failure.

Signed-off-by: Jiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: Jack Gui <Jack.Gui@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Use SKU instead of DID for FRU check v2

The VG20 DIDs 66a0, 66a1 and 66a4 are used for various SKUs that may or may
not have the FRU EEPROM on it. Parse the VBIOS to check for server SKU
variants (D131 or D134) until a more general solution can be determined.

v2: Remove string-based logic, correct the VBIOS string comment

Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: label internally used symbols as static

Used sparse(make C=1) to find these loose ends.

v2:
removed unwanted extra line

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu/fru: fix header guard and include header

Fix the fru eeprom header guard and include it in the .c file.

Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Disable FRU read on Arcturus

Update the list with supported Arcturus chips, but disable for now until
final list is confirmed.

Ideally we can poll atombios for FRU support, instead of maintaining
this list of chips, but this will enable serial number reading for
supported ASICs for the time-being.

Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Re-enable FRU check for most models v5

There is at least 1 VG20 DID that does not have an FRU, and trying to read
that will cause a hang. For now, explicitly support reading the FRU for
Arcturus and for the WKS VG20 DIDs, and skip for everything else.
This re-enables serial number reporting for server cards

v2: Add ASIC check
v3: Don't default to true for pre-VG20
v4: Use DID instead of parsing the VBIOS
v5: Sqaush in overflow warning fix

Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Fix FRU data checking

Ensure that when we memcpy, we don't end up copying more data than
the struct supports. For now, this is 16 characters for product number
and serial number, and 32 chars for product name

Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: disabled fru eeprom access

added asic support checking function to be filled in by supported asic types

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: John Clements <john.clements@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Enable reading FRU chip via I2C v3

Allow for reading of information like manufacturer, product number
and serial number from the FRU chip. Report the serial number as
the new sysfs file serial_number. Note that this only works on
server cards, as consumer cards do not feature the FRU chip, which
contains this information.

v2: Add documentation to amdgpu.rst, add helper functions,
rename functions for consistency, fix bad starting offset
v3: Remove testing definitions

Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>