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i965: Allocate VMA in userspace for full-PPGTT systems.

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This patch enables soft-pinning of all buffers, allowing us to skip
relocation processing entirely.  All systems with full PPGTT and > 4GB
of VMA should gain these benefits.  This should be most Gen8+.

Unfortunately, this excludes a few systems:
- Cherryview (only has 32-bit addressing, despite 48-bit pointers)
- Broadwell with a 32-bit kernel
- Anybody running pre-4.5 kernel.

We may enable it for Cherryview in the future, but it would require
some tweaks to the memory zone.

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Kenneth Graunke 2018-04-10 01:18:25 -07:00
parent 74259b98aa
commit a363bb2cd0
1 changed files with 1 additions and 1 deletions
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2
src/mesa/drivers/dri/i965/brw_bufmgr.c
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@ -1724,7 +1724,7 @@ brw_bufmgr_init(struct gen_device_info *devinfo, int fd)
bufmgr->initial_kflags |= EXEC_OBJECT_SUPPORTS_48B_ADDRESS; bufmgr->initial_kflags |= EXEC_OBJECT_SUPPORTS_48B_ADDRESS;
/* Allocate VMA in userspace if we have softpin and full PPGTT. */ /* Allocate VMA in userspace if we have softpin and full PPGTT. */
if (false && gem_param(fd, I915_PARAM_HAS_EXEC_SOFTPIN) > 0 && if (gem_param(fd, I915_PARAM_HAS_EXEC_SOFTPIN) > 0 &&
gem_param(fd, I915_PARAM_HAS_ALIASING_PPGTT) > 1) { gem_param(fd, I915_PARAM_HAS_ALIASING_PPGTT) > 1) {
bufmgr->initial_kflags |= EXEC_OBJECT_PINNED; bufmgr->initial_kflags |= EXEC_OBJECT_PINNED;