If the buffer is being used, we should wait for those uses to be
complete before returning the map.
Fixes: GL45-CTS.direct_state_access.buffers_functional
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: mesa-stable@lists.freedesktop.org
We currently don't pass the low byte of the address via the surface
info, so in order to work with images, these have to implicitly be
aligned to 256. The proprietary driver also doesn't go out of its way to
provide lower alignment.
Fixes GL45-CTS.texture_buffer.texture_buffer_texture_buffer_range
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
This restores the performance warnings removed in:
i965: Drop brw_bo_map[_gtt] wrappers which issue perf warnings.
but adds them for nearly all BO mapping, and also for wait_rendering.
Because we add this to the core bufmgr, we automatically get stall
warnings in all callers, unlike before where only a few callsites used
the wrappers that gave stall warnings.
We also do it a bit differently: we simply measure how long set_domain
takes (the part that stalls), and complain if it's more than 0.01 ms.
We don't bother calling brw_bo_busy(), and we don't measure the mmap
time (which doesn't stall). This should be more accurate.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
In theory gcc is free to re-load them, and if a concurrent
execbuf races and updates bo->offset64 then we have a problem:
execbuffer api requires that the ->presumed_offset and the one
we used for the reloc matches. It does not require that the value
is sensible, which means no locks needed, just a consistent load.
Ken said his next series will nuke this, so just hand-roll the
kernel's READ_ONCE idea inline.
FIXME: Most callers of brw_emit_reloc recompute the relocation
themselves, which means this doesn't really fix the race. But the long
term plan is to move to per-context relocation handling, which will
fix this all properly. So leave this for now as just a reminder.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This was done because the kernel has 1 global address space, shared
with all render clients, for gtt mmap offsets, and that address space
was only 32bit on 32bit kernels.
This was fixed in
commit 440fd5283a87345cdd4237bdf45fb01130ea0056
Author: Thierry Reding <treding@nvidia.com>
Date: Fri Jan 23 09:05:06 2015 +0100
drm/mm: Support 4 GiB and larger ranges
which shipped in 4.0. Of course you still want to limit the bo cache
to a reasonable size on 32bit apps to avoid ENOMEM, but that's better
solved by tuning the cache a bit. On 64bit, this was never an issue.
On top, mesa never set this, so it's all dead code. Collect an trash it.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
is_reusable was needed by uxa because it couldn't keep track of its
scanout buffers and used this as a proxy. Disabling reuse is a silly
idea, we set this once at start. Remove both.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Iirc this was used by uxa for persistent mmpas of the frontbuffer. For
mesa all the set_domain stuff needed before a synchronized mmap is handled
within the bufmgr, so no reason ever to call this.
Inline the implementation into its only internal user.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Entirely unused, and really shouldn't be used. The alloc functions already
take care of this. And even in a future where we're not going to
h/v-align tiled buffers in the bufmgr, but only in isl, I think we
still want to adjust the tiling mode in the bufmgr, since that ties in
closely to mmaps and stuff like that.
get_tiling is still needed for the import paths (until we have modifiers
everywhere).
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
indent -i3 -nut -br -brs -npcs -ce --no-tabs -Tuint32_t -Tuint64_t
plus some manual fixes because those aren't quite the right settings.
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
The bacon is all gone.
This renames both the class and the related functions. We're about to
run indent on the bufmgr code, so no need to worry about fixing bad
indentation.
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
The stupid reason for eliminating these functions is that I'm about
to rename drm_bacon_bo_map() to brw_bo_map(), which makes the real
function have the short name, rather than the wrapper.
I'm also planning on reworking our mapping code soon, so we use WC
mappings and proper unsynchronized mappings on non-LLC platforms.
It will be easier to do that without thinking about the stall
warnings and wrappers.
My eventual hope is to put the performance warnings in the BO map
function itself, so all callers gain the warning.
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
drm_bacon_context is a malloc'd struct containing a uint32_t context ID
and a pointer back to the bufmgr. The bufmgr pointer is pretty useless,
as everybody already has brw->bufmgr. At that point...we may as well
just use the ctx_id handle directly. A number of places already had to
call drm_bacon_gem_context_get_id() to extract the ID anyway. Now they
just have it.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
We're going to get rid of drm_bacon_context shortly, so we'd have to
change the interface slightly. It's basically just an ioctl wrapper
that isn't terribly bufmgr-related, so We may as well just combine it
with the code in brw_reset.c that actually uses it.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
No need for a prefix as this struct is local to the .c file.
Less bacon.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Mesa style is to not use lengthy prefixes for static functions.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
The only difference is that it takes an explicit bufmgr rather than
using bo->bufmgr, but there is only one bufmgr per screen so they
should be identical anyway.
Chris says this was added primarly to avoid bo/bo_gem casting,
which was inconvenient.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
The separate class gives us a bit of extra encapsulation, but I don't
know that it's really worth the boilerplate. I think we can reasonably
expect the rest of the driver to be responsible.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
These fields are the same value. In the bad old days, bo->handle could
have been an identifier from the pre-GEM fake bufmgr, but that's long
gone. Keep the "gem_handle" name for clarity.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
The execbuf2 kernel API requires us to construct two kinds of lists.
First is a "validation list" (struct drm_i915_gem_exec_object2[])
containing each BO referenced by the batch. (The batch buffer itself
must be the last entry in this list.) Each validation list entry
contains a pointer to the second kind of list: a relocation list.
The relocation list contains information about pointers to BOs that
the kernel may need to patch up if it relocates objects within the VMA.
This is a very general mechanism, allowing every BO to contain pointers
to other BOs. libdrm_intel models this by giving each drm_intel_bo a
list of relocations to other BOs. Together, these form "reloc trees".
Processing relocations involves a depth-first-search of the relocation
trees, starting from the batch buffer. Care has to be taken not to
double-visit buffers. Creating the validation list has to be deferred
until the last minute, after all relocations are emitted, so we have the
full tree present. Calculating the amount of aperture space required to
pin those BOs also involves tree walking, which is expensive, so libdrm
has hacks to try and perform less expensive estimates.
For some reason, it also stored the validation list in the global
(per-screen) bufmgr structure, rather than as an local variable in the
execbuffer function, requiring locking for no good reason.
It also assumed that the batch would probably contain a relocation
every 2 DWords - which is absurdly high - and simply aborted if there
were more relocations than the max. This meant the first relocation
from a BO would allocate 180kB of data structures!
This is way too complicated for our needs. i965 only emits relocations
from the batchbuffer - all GPU commands and state such as SURFACE_STATE
live in the batch BO. No other buffer uses relocations. This means we
can have a single relocation list for the batchbuffer. We can add a BO
to the validation list (set) the first time we emit a relocation to it.
We can easily keep a running tally of the aperture space required for
that list by adding the BO size when we add it to the validation list.
This patch overhauls the relocation system to do exactly that. There
are many nice benefits:
- We have a flat relocation list instead of trees.
- We can produce the validation list up front.
- We can allocate smaller arrays and dynamically grow them.
- Aperture space checks are now (a + b <= c) instead of a tree walk.
- brw_batch_references() is a trivial validation list walk.
It should be straightforward to make it O(1) in the future.
- We don't need to bloat each drm_bacon_bo with 32B of reloc data.
- We don't need to lock in execbuffer, as the data structures are
context-local, and not per-screen.
- Significantly less code and a better match for what we're doing.
- The simpler system should make it easier to take advantage of
I915_EXEC_NO_RELOC in a future patch.
Improves performance in Synmark 7.0's OglBatch7:
- Skylake GT4e: 12.1499% +/- 2.29531% (n=130)
- Apollolake: 3.89245% +/- 0.598945% (n=35)
Improves performance in GFXBench4's gl_driver2 test:
- Skylake GT4e: 3.18616% +/- 0.867791% (n=229)
- Apollolake: 4.1776% +/- 0.240847% (n=120)
v2: Feedback from Chris Wilson:
- Omit explicit zero initializers for garbage execbuf fields.
- Use .rsvd1 = ctx_id rather than i915_execbuffer2_set_context_id
- Drop unnecessary fencing assertions.
- Only use _WR variant of execbuf ioctl when necessary.
- Shrink the arrays to be smaller by default.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
I'm about to rewrite how relocation handling works, at which point
drm_bacon_bo_emit_reloc() and drm_bacon_bo_mrb_exec() won't exist
anymore. This code is already largely not using the batchbuffer
infrastructure, so just go all the way and handle relocations, the
validation list, and execbuffer ourselves. That way, we don't have
to think the weird case where we only have a screen, and no context,
when redesigning the relocation handling.
v2: Write reloc.presumed_offset + reloc.delta into the batch, rather
than duplicating the comment, so it's obvious that they match
(suggested by Chris). Also add a comment about why we don't do
any error checking.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
This is the threshold after which drm_intel_bufmgr_check_aperture_space
returns -ENOSPC, signalling that it thinks an execbuf is likely to fail
and we need to roll back and flush the batch.
We'll need this when we rewrite aperture space checking, shortly.
In the meantime, we can also use it in GLX_MESA_query_renderer.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
We'll want to change the implementation of this shortly.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
I'm about to make brw_emit_reloc do actual work, so everybody needs
to start using it and not the raw drm_bacon function.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
This renames intel_batchbuffer_reloc to brw_emit_reloc and changes the
parameter naming and ordering to match drm_intel_bo_emit_reloc().
For now, it's a trivial wrapper that accesses batch->bo. When we
rework relocations, it will start doing actual work.
target_offset should be expanded to a uint64_t to match the kernel,
but for now we leave it as its original 32-bit type.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
This is only useful when doing an incoherent CPU mapping of the current
scanout buffer. That's a terrible plan, so we never do it. We always
use an uncached GTT map.
So, this is useless. Drop the code.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
This functionality was added by libdrm commit
743af59669386cb6e063fa4bd85f0a0b2da86295 (intel: make bufmgr_gem
shareable from different API) in an attempt to solve libva/mesa buffer
sharing problems. Specifically, this was working around an issue hit
by Chromium, which used the same drm_fd for multiple APIs, and shared
buffers between them.
This code attempted to work around that issue by using the same bufmgr
for both libva and Mesa. It worked because libdrm_intel was loaded by
both libraries. However, now that Mesa has forked, we don't have a
common library, and this code cannot work.
The correct solution is to have each API open its own file descriptor
(and get a corresponding buffer manager), and then use PRIME export
and import to share BOs across those APIs. Then the kernel can manage
those shared resources. According to Chris, the kernel will pass back
the same handle for a prime FD if the lookup is from the same device FD.
We believe Chromium has since moved to this model.
In Mesa, there is already only one screen per FD, and so there will
only be one bufmgr per FD. We don't need any of this code.
v2: Add a big warning comment written by Chris Wilson.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
This used to have another field, but now it's just a BO pointer.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
No performance data has been gathered about this choice. I just don't
want that many hash tables. Chris points out that this is not
performance critical - we should not be recreating that many handles
from scratch. In the past we used a linear list, which became
unreasonable in stress tests that used hundreds of thousands of BOs.
In real usage, it shouldn't matter that much.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Mesa doesn't use this yet. We'll almost certainly want to, but we can
add the functionality back after we clean up the messy drm code.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
We may want this eventually, but simplify for now. We can add it back
later when we actually intend to use it.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
We'll want userptr support for GL_AMD_pinned_memory support someday,
and possibly some other upload optimizations. Chris says "not in this
form" though. Drop it and simplify for now - we can add it back later
when we're ready to hook it up fully.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
This is basically handholding to prevent a bogus caller from trying to
execbuffer on a bogus engine. i965 already does this correctly.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
This moves the PCI ID detection to intel_screen.c and makes
drm_bacon_bufmgr_gem_init() take a devinfo pointer.
We also drop the HAS_LLC query stuff - devinfo has that info already,
without kernel queries, and it makes no sense to have two has_llc flags
set by different mechanisms.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
This field was the wrong size, so we replaced it with offset64.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
The wait-ioctl was introduced in kernel v3.6 (20120930) and that is our
current minimum requirement for screen creation.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
This query has been available since 2.6.28. We require 3.6.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
The distinction was required when the bufmgr was virtualised, now there
is only one class, we no longer need the distraction of pretending it is
a subclass.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
This moves us one step closer to killing off intel_bufmgr_priv.h.
We might want to nuke it altogether, since it's basically just a
uint32_t handle, but for now, let's focus on removing files.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
libdrm_bacon used to have a GEM-based bufmgr and a legacy fake bufmgr,
but that's long since dead (and we never imported it to i965). So,
drop the extra layer of function pointers.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Eliminates some API around this, and more importantly, the last
field in one bufmgr class.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Replace the duplicated macros imported from libdrm:
ARRAY_SIZE, MAX2, ALIGN, STATIC_ASSERT
and remove unused ROUND_UP_TO and ROUND_UP_TO_MB.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
