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drm/amd/amdgpu: Make debugfs write compliment read 

Add PG lock support as well as bank selection to
the MMIO write function.

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Tom St Denis 2016-10-10 07:31:23 -04:00 committed by Alex Deucher
parent 32977f93b4
commit 394fdde256
1 changed files with 43 additions and 0 deletions
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43
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View File

@ -2639,10 +2639,45 @@ static ssize_t amdgpu_debugfs_regs_write(struct file *f, const char __user *buf,
struct amdgpu_device *adev = f->f_inode->i_private;
ssize_t result = 0;
int r;
bool pm_pg_lock, use_bank;
unsigned instance_bank, sh_bank, se_bank;
if (size & 0x3 || *pos & 0x3)
return -EINVAL;
/* are we reading registers for which a PG lock is necessary? */
pm_pg_lock = (*pos >> 23) & 1;
if (*pos & (1ULL << 62)) {
se_bank = (*pos >> 24) & 0x3FF;
sh_bank = (*pos >> 34) & 0x3FF;
instance_bank = (*pos >> 44) & 0x3FF;
if (se_bank == 0x3FF)
se_bank = 0xFFFFFFFF;
if (sh_bank == 0x3FF)
sh_bank = 0xFFFFFFFF;
if (instance_bank == 0x3FF)
instance_bank = 0xFFFFFFFF;
use_bank = 1;
} else {
use_bank = 0;
}
*pos &= 0x3FFFF;
if (use_bank) {
if ((sh_bank != 0xFFFFFFFF && sh_bank >= adev->gfx.config.max_sh_per_se) ||
(se_bank != 0xFFFFFFFF && 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);
}
if (pm_pg_lock)
mutex_lock(&adev->pm.mutex);
while (size) {
uint32_t value;
@ -2661,6 +2696,14 @@ static ssize_t amdgpu_debugfs_regs_write(struct file *f, const char __user *buf,
size -= 4;
}
if (use_bank) {
amdgpu_gfx_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff);
mutex_unlock(&adev->grbm_idx_mutex);
}
if (pm_pg_lock)
mutex_unlock(&adev->pm.mutex);
return result;
}