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| author | Christian König <christian.koenig@amd.com> | 2014-07-19 15:55:58 +0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2014-08-05 16:53:52 +0400 |
| commit | dfc230f9aff93cc67faf7e0e191dbb3dd7c6ecbb (patch) | |
| tree | 991f9e98615a3ba6e63ca7170240094841d1cd89 /drivers/gpu/drm/radeon/radeon_device.c | |
| parent | f77c4f0223a1f0e259007c7431f64df5c29a0bf7 (diff) | |
| download | linux-dfc230f9aff93cc67faf7e0e191dbb3dd7c6ecbb.tar.xz | |
drm/radeon: adjust default radeon_vm_block_size v2
v2: rebase on vm_size scale change. Adjust vm_size default to 8,
Better handle the default and smaller values.
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_device.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_device.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c index 248bce86af51..c8ea050c8fa4 100644 --- a/drivers/gpu/drm/radeon/radeon_device.c +++ b/drivers/gpu/drm/radeon/radeon_device.c @@ -1123,7 +1123,19 @@ static void radeon_check_arguments(struct radeon_device *rdev) /* defines number of bits in page table versus page directory, * a page is 4KB so we have 12 bits offset, minimum 9 bits in the * page table and the remaining bits are in the page directory */ - if (radeon_vm_block_size < 9) { + if (radeon_vm_block_size == -1) { + + /* Total bits covered by PD + PTs */ + unsigned bits = ilog2(radeon_vm_size) + 17; + + /* Make sure the PD is 4K in size up to 8GB address space. + Above that split equal between PD and PTs */ + if (radeon_vm_size <= 8) + radeon_vm_block_size = bits - 9; + else + radeon_vm_block_size = (bits + 3) / 2; + + } else if (radeon_vm_block_size < 9) { dev_warn(rdev->dev, "VM page table size (%d) too small\n", radeon_vm_block_size); radeon_vm_block_size = 9; |