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drm/amd/amdgpu: Add bank selection for MMIO debugfs (v3) 

(v2) Added INSTANCE selector
(v3) Changed order of bank selectors

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Tom St Denis 2016-06-27 11:55:07 -04:00 committed by Alex Deucher
parent 1e0514131d
commit 5662815950
1 changed files with 32 additions and 3 deletions
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35
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View File

@ -2181,20 +2181,43 @@ static ssize_t amdgpu_debugfs_regs_read(struct file *f, char __user *buf,
struct amdgpu_device *adev = f->f_inode->i_private;
ssize_t result = 0;
int r;
bool use_bank;
unsigned instance_bank, sh_bank, se_bank;
if (size & 0x3 || *pos & 0x3)
return -EINVAL;
if (*pos & (1ULL << 62)) {
se_bank = (*pos >> 24) & 0x3FF;
sh_bank = (*pos >> 34) & 0x3FF;
instance_bank = (*pos >> 44) & 0x3FF;
use_bank = 1;
*pos &= 0xFFFFFF;
} else {
use_bank = 0;
}
if (use_bank) {
if (sh_bank >= adev->gfx.config.max_sh_per_se ||
se_bank >= adev->gfx.config.max_shader_engines)
return -EINVAL;
mutex_lock(&adev->grbm_idx_mutex);
amdgpu_gfx_select_se_sh(adev, se_bank,
sh_bank, instance_bank);
}
while (size) {
uint32_t value;
if (*pos > adev->rmmio_size)
return result;
goto end;
value = RREG32(*pos >> 2);
r = put_user(value, (uint32_t *)buf);
if (r)
return r;
if (r) {
result = r;
goto end;
}
result += 4;
buf += 4;
@ -2202,6 +2225,12 @@ static ssize_t amdgpu_debugfs_regs_read(struct file *f, char __user *buf,
size -= 4;
}
end:
if (use_bank) {
amdgpu_gfx_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff);
mutex_unlock(&adev->grbm_idx_mutex);
}
return result;
}