linux-toradex.git/include/drm/drm_mm.h, branch v4.4.23

drm/mm: Support 4 GiB and larger ranges

2015-03-04T23:01:37+00:00

The current implementation is limited by the number of addresses that
fit into an unsigned long. This causes problems on 32-bit Tegra where
unsigned long is 32-bit but drm_mm is used to manage an IOVA space of
4 GiB. Given the 32-bit limitation, the range is limited to 4 GiB - 1
(or 4 GiB - 4 KiB for page granularity).

This commit changes the start and size of the range to be an unsigned
64-bit integer, thus allowing much larger ranges to be supported.

[airlied: fix i915 warnings and coloring callback]

Signed-off-by: Thierry Reding 
Reviewed-by: Alex Deucher 
Reviewed-by: Chris Wilson 
Signed-off-by: Dave Airlie 

fixupo

drm: Add support for two-ended allocation, v3

2014-04-03T23:28:14+00:00

Clients like i915 need to segregate cache domains within the GTT which
can lead to small amounts of fragmentation. By allocating the uncached
buffers from the bottom and the cacheable buffers from the top, we can
reduce the amount of wasted space and also optimize allocation of the
mappable portion of the GTT to only those buffers that require CPU
access through the GTT.

For other drivers, allocating small bos from one end and large ones
from the other helps improve the quality of fragmentation.

Based on drm_mm work by Chris Wilson.

v3: Changed to use a TTM placement flag
v2: Updated kerneldoc

Cc: Chris Wilson 
Cc: Ben Widawsky 
Cc: Christian König 
Signed-off-by: Lauri Kasanen 
Signed-off-by: David Airlie

drm/doc: Add function reference documentation for drm_mm.c

2014-03-13T11:48:37+00:00

While at it do a tiny bit of interface cleanup and convert boolean
return values to bool. With this patch all exported functions and inline
helpers which are part of the drm_mm public interface are documented.

Also drop superflous extern function modifiers since most of drm_mm.h
doesn't use them - more consistent that way.

Reviewed-by: Alex Deucher 
Signed-off-by: Daniel Vetter

drm/mm: remove unused API

2013-08-07T00:16:50+00:00

We used to pre-allocate drm_mm nodes and save them in a linked list for
later usage so we always have spare ones in atomic contexts. However, this
is really racy if multiple threads are in an atomic context at the same
time and we don't have enough spare nodes. Moreover, all remaining users
run in user-context and just lock drm_mm with a spinlock. So we can easily
preallocate the node, take the spinlock and insert the node.

This may have worked well with BKL in place, however, with today's
infrastructure it really doesn't make any sense. Besides, most users can
easily embed drm_mm_node into their objects so no allocation is needed at
all.

Thus, remove the old pre-alloc API and all the helpers that it provides.
Drivers have already been converted and we should not use the old API for
new code, anymore.

Signed-off-by: David Herrmann 
Acked-by: Daniel Vetter 
Signed-off-by: Dave Airlie

drm/mm: add "best_match" flag to drm_mm_insert_node()

2013-08-07T00:08:58+00:00

Add a "best_match" flag similar to the drm_mm_search_*() helpers so we
can convert TTM to use them in follow up patches. We can also inline the
non-generic helpers and move them into the header to allow compile-time
optimizations.

To make calls to drm_mm_{search,insert}_node() more readable, this
converts the boolean argument to a flagset. There are pending patches that
add additional flags for top-down allocators and more.

v2:
 - use flag parameter instead of boolean "best_match"
 - convert *_search_free() helpers to also use flags argument

Signed-off-by: David Herrmann 
Reviewed-by: Daniel Vetter 
Signed-off-by: Dave Airlie

drm/mm: include required headers in drm_mm.h

2013-08-01T00:28:09+00:00

We need BUG_ON(), spinlock_t and standard kernel data-types so include the
right headers.

Subject: [drm-intel:drm-intel-nightly 154/166] include/drm/drm_mm.h:67:2:
 error: unknown type name 'spinlock_t'
Message-ID: <51f14693.g5HGdcuw2v3m8FOd%fengguang.wu@intel.com>

In case it didn't link to it correctly. Somehow this bug doesn't occur
here on my machine, hmm. But I think fixing drm_mm.h is better than
changing the include-order in drm_vma_manager.h, so this is what I
did.

Signed-off-by: David Herrmann 
Signed-off-by: Dave Airlie

Merge tag 'drm-intel-next-2013-07-12' of git://people.freedesktop.org/~danvet/drm-intel into drm-next

2013-07-19T02:12:21+00:00

 Highlights:
- follow-up refactoring after the shared dpll rework that landed in 3.11
- oddball prep cleanups from Ben for ppgtt
- encoder->get_config state tracking infrastructure from Jesse
- used by the experimental fastboot support from Jesse (disabled by
  default)
- make the error state file official and add it to our sysfs interface
  (Mika)
- drm_mm prep changes from Ben, prepares to embedd the drm_mm_node (which
  will be used by the vma rework later on)
- interrupt handling rework, follow up cleanups to the VECS enabling, hpd
  storm handling and fifo underrun reporting.
- Big pile of smaller cleanups, code improvements and related stuff.

* tag 'drm-intel-next-2013-07-12' of git://people.freedesktop.org/~danvet/drm-intel: (72 commits)
  drm/i915: clear DPLL reg when disabling i9xx dplls
  drm/i915: Fix up cpt pixel multiplier enable sequence
  drm/i915: clean up vlv ->pre_pll_enable and pll enable sequence
  drm/i915: move error state to own compilation unit
  drm/i915: Don't attempt to read an unitialized stack value
  drm/i915: Use for_each_pipe() when possible
  drm/i915: don't enable PM_VEBOX_CS_ERROR_INTERRUPT
  drm/i915: unify ring irq refcounts (again)
  drm/i915: kill dev_priv->rps.lock
  drm/i915: queue work outside spinlock in hsw_pm_irq_handler
  drm/i915: streamline hsw_pm_irq_handler
  drm/i915: irq handlers don't need interrupt-safe spinlocks
  drm/i915: kill lpt pch transcoder->crtc mapping code for fifo underruns
  drm/i915: improve GEN7_ERR_INT clearing for fifo underrun reporting
  drm/i915: improve SERR_INT clearing for fifo underrun reporting
  drm/i915: extract ibx_display_interrupt_update
  drm/i915: remove unused members from drm_i915_private
  drm/i915: don't frob mm.suspended when not using ums
  drm/i915: Fix VLV DP RBR/HDMI/DAC PLL LPF coefficients
  drm/i915: WARN if the bios reserved range is bigger than stolen size
  ...

Conflicts:
	drivers/gpu/drm/i915/i915_gem.c

drm: Change create block to reserve node

2013-07-08T20:04:33+00:00

With the previous patch we no longer actually create a node, we simply
find the correct hole and occupy it. This very well could have been
squashed with the last patch, but since I already had David's review, I
figured it's easiest to keep it distinct.

Also update the users in i915. Conveniently this is the only user of the
interface.

CC: David Airlie 
CC: 
Signed-off-by: Ben Widawsky 
Acked-by: David Airlie 
Signed-off-by: Daniel Vetter

drm: pre allocate node for create_block

2013-07-08T20:04:32+00:00

For an upcoming patch where we introduce the i915 VMA, it's ideal to
have the drm_mm_node as part of the VMA struct (ie. it's pre-allocated).
Part of the conversion to VMAs is to kill off obj->gtt_space. Doing this
will break a bunch of code, but amongst them are 2 callers of
drm_mm_create_block(), both related to stolen memory.

It also allows us to embed the drm_mm_node into the object currently
which provides a nice transition over to the new code.

v2: Reordered to do before ripping out obj->gtt_offset.
Some minor cleanups made available because of reordering.

v3: s/continue/break on failed stolen node allocation (David)
Set obj->gtt_space on failed node allocation (David)
Only unref stolen (fix double free) on failed create_stolen (David)
Free node, and NULL it in failed create_stolen (David)
Add back accidentally removed newline (David)

CC: 
Reviewed-by: David Herrmann 
Signed-off-by: Ben Widawsky 
Acked-by: David Airlie 
Signed-off-by: Daniel Vetter

drm/mm: kill color_search_free/get_block

2013-07-04T00:57:40+00:00

drm/i915 is the only user of the color allocation handling and
switched to insert_node a while ago. So we can ditch this.

Signed-off-by: Daniel Vetter 
Reviewed-by: Chris Wilson 
Signed-off-by: Dave Airlie