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1. Rename securedisplay_cmd to ta_securedisplay_cmd.
2. Rename ta_securedisplay_max_phy to ta_securedisplay_phy_ID.
3. update securedisplay_cmd to ta_securedisplay_cmd
Signed-off-by: Aaron Liu <[email protected]>
Signed-off-by: Shane Xiao <[email protected]>
Reviewed-by: Alan Liu <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
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securedisplay command buffer
[Why]
Before we call psp_securedisplay_invoke(), we call
psp_prep_securedisplay_cmd_buf() to prepare and initialize the command
buffer.
However, we didn't use the mutex_lock to protect the status of command
buffer. So when multiple threads are using the command buffer, after
thread A return from psp_securedisplay_invoke() and the command buffer
status is set to SUCCESS, another thread B may call
psp_prep_securedisplay_cmd_buf() and initialize the status to FAILURE
again, and cause Thread A to get a failure return status.
[How]
Move the mutex_lock out of psp_securedisplay_invoke() to its caller to
cover psp_prep_securedisplay_cmd_buf() and the code checking the return
status of command buffer.
Signed-off-by: Alan Liu <[email protected]>
Reviewed-by: Alex Deucher <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
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Signed-off-by: Candice Li <[email protected]>
Reviewed-by: John Clements <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
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Add compile flag CONFIG_DEBUG_FS to clear the warning:
unused variable 'amdgpu_securedisplay_debugfs_ops'
Signed-off-by: Jinzhou Su <[email protected]>
Acked-by: Alex Deucher <[email protected]>
Acked-by: Huang Rui <[email protected]>
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
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A previous fix I did left a rather complicated loop in
amdgpu_securedisplay_debugfs_write() for what could be expressed in a
simple sprintf, as Rasmus pointed out.
This drops the leading 0x for each byte, but is otherwise
much nicer.
Suggested-by: Rasmus Villemoes <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
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gcc warns about an sprintf() that uses the same buffer as source
and destination, which is undefined behavior in C99:
drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c: In function 'amdgpu_securedisplay_debugfs_write':
drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:141:6: error: 'sprintf' argument 3 overlaps destination object 'i2c_output' [-Werror=restrict]
141 | sprintf(i2c_output, "%s 0x%X", i2c_output,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
142 | securedisplay_cmd->securedisplay_out_message.send_roi_crc.i2c_buf[i]);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:97:7: note: destination object referenced by 'restrict'-qualified argument 1 was declared here
97 | char i2c_output[256];
| ^~~~~~~~~~
Rewrite it to remember the current offset into the buffer instead.
Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
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update secure display TA header file.
Signed-off-by: Jinzhou Su <[email protected]>
Reviewed-by: Huang Rui <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
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Add interface to load, unload, invoke command for
secure display TA.
v2: Add debugfs interface for secure display TA
v3: fix warning in copy_from_user (Alex)
Signed-off-by: Jinzhou.Su <[email protected]>
Reviewed-by: Huang Rui <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
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