Commit Graph

1285 Commits

Author SHA1 Message Date
Dave Airlie
110e6f26af drm/amd: make a type-safe cgs_device struct. (v2)
This is just a type-safety things to avoid everyone taking void *,
it doesn't change anything.

v2: agd5f: split out the dal changes into a separate patch.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:20:28 -04:00
Arindam Nath
c036554170 drm/amdgpu: handle more than 10 UVD sessions (v2)
Change History
--------------

v2:
- Make firmware version check correctly. Firmware
  versions >= 1.80 should all support 40 UVD
  instances.
- Replace AMDGPU_MAX_UVD_HANDLES with max_handles
  variable.

v1:
- The firmware can handle upto 40 UVD sessions.

Signed-off-by: Arindam Nath <arindam.nath@amd.com>
Signed-off-by: Ayyappa Chandolu <ayyappa.chandolu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:20:23 -04:00
Nils Wallménius
aeba709a15 drm/amd: make some function-local tables static const
These tables were initialized on stack on each call, avoid that
and save a little bit of text size.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Nils Wallménius <nils.wallmenius@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:20:20 -04:00
Nils Wallménius
e90b62277b drm/amd/powerplay: mark phm_master_table_* structs as const
Also adjust phm_construct_table to take a const pointer

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Nils Wallménius <nils.wallmenius@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:20:17 -04:00
Nils Wallménius
d3a84aa074 drm/amd/powerplay: Mark pem_event_action chains as const
As these arrays were of pointer to pointer type, they were
pointer to pointer to const. Make them pointer to const
pointer to const.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Nils Wallménius <nils.wallmenius@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:20:13 -04:00
Nils Wallménius
06ab6832ac drm/amdgpu: Mark all instances of struct drm_info_list as const
All these are compile time constand and the
drm_debugfs_create/remove_files functions take a const
pointer argument.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Nils Wallménius <nils.wallmenius@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:20:10 -04:00
Nils Wallménius
62250a910a drm/amd/scheduler: Mark amdgpu_sched_ops const
This marks the struct amdgpu_sched_ops const and
adjusts amd_sched_init to take a const pointer
for the ops param. The ops member of
struct amd_gpu_scheduler is also changed to const.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Nils Wallménius <nils.wallmenius@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:20:05 -04:00
Nils Wallménius
f498d9ed26 drm/amd: Mark some tables as const
This patch marks some compile-time constant tables 'const'.
The tables marked in this patch are the low hanging fruit
where little other changes were necesary to avoid casting
away constness etc. Also mark some tables that are private
to a file as static.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Nils Wallménius <nils.wallmenius@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:20:00 -04:00
Alex Deucher
7e8d1fbdc0 drm/amd/powerplay: fix stutter setup in mclk level init
Stale ifdef.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:19:53 -04:00
Christian König
794f50b95d drm/amdgpu: reuse VMIDs already assigned to a process
If we don't need to flush we can easily use another VMID
already assigned to the process.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:19:30 -04:00
Christian König
41d9eb2c5a drm/amdgpu: add a fence after the VM flush
This way we can track when the flush is done.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:19:24 -04:00
Christian König
832a902f94 drm/amdgpu: use a sync object for VMID fences v2
v2: rebase & cleanup

This way we can store more than one fence as user for each VMID.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com> (v1)
Reviewed-by: Chunming Zhou <david1.zhou@amd.com> (v1)
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:19:16 -04:00
Christian König
bcb1ba35a8 drm/amdgpu: merge VM manager and VM context ID structure
No need to have two of them any more.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:19:13 -04:00
Andrey Grodzovsky
bd4c72d1e9 drm/amdgpu: Set PFLIP_SUBMITTED for crtc after address update
Also add some pflip debug prints.

This change allows us to wait on pflip status until the new surface address
is actually submitted to the register.

This reverts ed3020e923240829dcdfd3343f6e91dc02c63775
drm/amdgpu: Move MMIO flip out of spinlocked region
The original change assumed DAL will aquire locks inside DAL
implemetion of page_flip callback which eventaully didn't happen.

This moves the flip before status update which makes sense for the
non-DAL code pathes as well.

Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:19:07 -04:00
Eric Huang
a4333b4c99 drm/amd/powerplay: add deep sleep divider id into DPM table on Tonga
Add a proper implementation for setting the deep sleep divider.

Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-04 20:18:40 -04:00
Christian König
a1d29476d6 drm/amdgpu: optionally enable GART debugfs file
Keeping the pages array around can use a lot of system memory
when you want a large GART.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:26:57 -04:00
Christian König
4325198180 drm/amdgpu: remove GART page addr array
Not needed any more.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:26:57 -04:00
Christian König
8358dceed9 drm/amdgpu: use BO pages instead of GART array
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:26:56 -04:00
Christian König
fa3ab3c7ba drm/amdgpu: change parameter passing in the VM code
Make it more flexible by passing src and page addresses
directly instead of the structures they contain.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:26:56 -04:00
Christian König
c4e1a13a24 drm/amdgpu: drop the GTT power of two limit
As far as I can see that isn't neccessary any more.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:26:55 -04:00
Rex Zhu
0eadeab4af drm/amd/powerplay: use min_clock_in_sr for deep sleep feature.
This comes from the display handling code.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:25:42 -04:00
Tom St Denis
cde6493928 drm/amd/amdgpu: Enable clockgating in UVD6 for Stoney
This patch enables clockgating for the UVD6 block in Stoney.

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>
2016-05-02 15:25:41 -04:00
Tom St Denis
5f64e77e47 drm/amd/amdgpu: Enable clockgating for UVD5 on Tonga
This patch enables clock gating for the UVD5 block with
Tonga.

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>
2016-05-02 15:25:41 -04:00
Tom St Denis
be3ecca7fe drm/amd/amdgpu: Add SW clock gating support to UVD 5 and 6
This patch adds support for software clock gating to UVD 5
and UVD 6 blocks with a preliminary commented out hardware
gating routine.

Currently hardware gating does not work so it's not activated.

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>
2016-05-02 15:25:40 -04:00
Rex Zhu
70f0f5fbcf drm/amdgpu: refine code for code style.
White space fix.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:24:43 -04:00
Rex Zhu
976accc114 drm/amdgpu: No need to stop hw init although vce's state was not true.
This is not a fatal error.

v2: add comment why ignore the error here.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:22:18 -04:00
Rex Zhu
cb48a13ef9 drm/amdgpu: fix issue that can't set vce clock gate.
Need to soft reset VCE as part of the clockgating
sequence.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:20:18 -04:00
Monk Liu
b6723c8da5 drm/amdgpu: use ref to keep job alive
this is to fix fatal page fault error that occured if:
job is signaled/released after its timeout work is already
put to the global queue (in this case the cancel_delayed_work
will return false), which will lead to NX-protection error
page fault during job_timeout_func.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:20:07 -04:00
Monk Liu
0de2479c95 drm/amdgpu: rework TDR in scheduler (v2)
Add two callbacks to scheduler to maintain jobs, and invoked for
job timeout calculations. Now TDR measures time gap from
job is processed by hw.

v2:
fix typo

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:19:57 -04:00
Monk Liu
cccd9bce97 drm/amdgpu: get rid of incorrect TDR
original time out detect routine is incorrect, cuz it measures
the gap from job scheduled, but we should only measure the
gap from processed by hw.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:19:42 -04:00
Monk Liu
4835096b07 drm/amdgpu: put job to list before done
the mirror_list will be used for later time out detect
feature.  This is needed to properly detect a GPU
timeout with the scheduler.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:17:53 -04:00
Monk Liu
e472d2588e drm/amdgpu: delay job free to when it's finished (v2)
for those jobs submitted through scheduler, do not
free it immediately after scheduled, instead free it
in global workqueue by its sched fence signaling
callback function.

v2:
call uf's bo_undef after job_run()
call job's sync free after job_run()
no static inline __amdgpu_job_free() anymore, just use
kfree(job) to replace it.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:17:41 -04:00
Vitaly Prosyak
01c02a8b19 drm/amdgpu/dce11: fix vertical bars appear on monitor
Fixed mc stop and resume hardware programming sequence.

Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:17:30 -04:00
Monk Liu
e686941a32 drm/amdgpu: use sched_job_init to initialize sched_job
Consolidate job initialization in one place rather than
duplicating it in multiple places.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:12:59 -04:00
Monk Liu
03ccf48198 drm/amdgpu: patch cond exec for SDMA
More ground work for conditional execution on SDMA
necessary for preemption.

Signed-off-by: Monk Liu <monk.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:11:09 -04:00
Monk Liu
128cff1af6 drm/amdgpu: support cond exec
This adds the groundwork for conditional execution on
SDMA which is necessary for preemption.

Signed-off-by: Monk Liu <monk.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:09:17 -04:00
Chunming Zhou
8e9fbeb522 drm/amdgpu: improve vmid assigment V2
V2: the signaled items on the LRU maintain their order

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 15:04:11 -04:00
Nils Wallménius
eca2240fb0 drm/amdgpu: mark amdgpu_allowed_register_entry tables as 'const'
Signed-off-by: Nils Wallménius <nils.wallmenius@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 13:08:57 -04:00
Nils Wallménius
379548f509 drm/amdgpu: do not store bios_header_start in amdgpu_device
It is only used locally in amdgpu_get_bios

Signed-off-by: Nils Wallménius <nils.wallmenius@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 13:08:56 -04:00
Nils Wallménius
139768ff92 drm/amdgpu: delete unused struct member suspend from amdgpu_device
Signed-off-by: Nils Wallménius <nils.wallmenius@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-05-02 13:08:55 -04:00
Dave Airlie
49047962ec Linux 4.6-rc3
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Merge tag 'v4.6-rc3' into drm-next

Backmerge 4.6-rc3 for i915.

Linux 4.6-rc3
2016-04-22 08:32:51 +10:00
Dave Airlie
fd8c61ebd4 Merge branch 'drm-fixes-4.6' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
Lots of misc bug fixes for radeon and amdgpu and one for ttm.
- fix vram info fetching on Fiji and unposted boards
- additional vblank fixes from the conversion to drm_vblank_on/off
- UVD dGPU suspend and resume fixes
- lots of powerplay fixes
- fix a fence leak in the pageflip code
- ttm fix for platforms where CPU is 32 bit, but physical addresses are >32bits

* 'drm-fixes-4.6' of git://people.freedesktop.org/~agd5f/linux: (21 commits)
  drm/amdgpu: total vram size also reduces pin size
  drm/amd/powerplay: add uvd/vce dpm enabling flag default.
  drm/amd/powerplay: fix issue that resume back, dpm can't work on FIJI.
  drm/amdgpu: save and restore the firwmware cache part when suspend resume
  drm/amdgpu: save and restore UVD context with suspend and resume
  drm/ttm: use phys_addr_t for ttm_bus_placement
  drm/radeon: Only call drm_vblank_on/off between drm_vblank_init/cleanup
  drm/amdgpu: fence wait old rcu slot
  drm/amdgpu: fix leaking fence in the pageflip code
  drm/amdgpu: print vram type rather than just DDR
  drm/amdgpu/gmc: use proper register for vram type on Fiji
  drm/amdgpu/gmc: move vram type fetching into sw_init
  drm/amdgpu: Set vblank_disable_allowed = true
  drm/radeon: Set vblank_disable_allowed = true
  drm/amd/powerplay: Need to change boot to performance state in resume.
  drm/amd/powerplay: add new Fiji function for not setting same ps.
  drm/amdgpu: check dpm state before pm system fs initialized.
  drm/amd/powerplay: notify amdgpu whether dpm is enabled or not.
  drm/amdgpu: Not support disable dpm in powerplay.
  drm/amdgpu: add an cgs interface to notify amdgpu the dpm state.
  ...
2016-04-07 07:08:46 +10:00
Dave Airlie
e7c8e54440 Merge tag 'topic/drm-misc-2016-04-01' of git://anongit.freedesktop.org/drm-intel into drm-next
* tag 'topic/drm-misc-2016-04-01' of git://anongit.freedesktop.org/drm-intel:
  drm: Add new DCS commands in the enum list
  drm: Make uapi headers C89 pendantic compliant
  drm/atomic: export drm_atomic_helper_wait_for_fences()
  drm: Untangle __KERNEL__ guards
  drm: Move DRM_MODE_OBJECT_* to uapi headers
  drm: align #include directives with libdrm in uapi headers
  drm: Make drm.h uapi header safe for C++
  vgacon: dummy implementation for vgacon_text_force
  drm/sysfs: Nuke TV/DVI property files
  drm/ttm: Remove TTM_HAS_AGP
  drm: bridge/dw-hdmi: Remove pre_enable/post_disable dummy funcs
  Revert "drm: Don't pass negative delta to ktime_sub_ns()"
  drm/atmel: Fixup drm_connector_/unplug/unregister/_all
  drm: Rename drm_connector_unplug_all() to drm_connector_unregister_all()
  drm: bridge: Make (pre/post) enable/disable callbacks optional
2016-04-06 09:39:01 +10:00
Chunming Zhou
7c0ecda15b drm/amdgpu: total vram size also reduces pin size
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
2016-04-05 15:23:31 -04:00
Rex Zhu
9162823145 drm/amd/powerplay: add uvd/vce dpm enabling flag default.
These should be set by default otherwise the UVD/VCE performance
won't be optimal.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-04-04 17:05:54 -04:00
Rex Zhu
0168f78fe1 drm/amd/powerplay: fix issue that resume back, dpm can't work on FIJI.
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-04-04 17:05:29 -04:00
Leo Liu
d23be4e34c drm/amdgpu: save and restore the firwmware cache part when suspend resume
Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-04-04 17:01:00 -04:00
Leo Liu
3f99dd814a drm/amdgpu: save and restore UVD context with suspend and resume
and revert fix following it accordingly

Revert "drm/amdgpu: stop trying to suspend UVD sessions v2"
Revert "drm/amdgpu: fix the UVD suspend sequence order"

Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-04-04 17:00:50 -04:00
Linus Torvalds
4a2d057e4f Merge branch 'PAGE_CACHE_SIZE-removal'
Merge PAGE_CACHE_SIZE removal patches from Kirill Shutemov:
 "PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
  ago with promise that one day it will be possible to implement page
  cache with bigger chunks than PAGE_SIZE.

  This promise never materialized.  And unlikely will.

  Let's stop pretending that pages in page cache are special.  They are
  not.

  The first patch with most changes has been done with coccinelle.  The
  second is manual fixups on top.

  The third patch removes macros definition"

[ I was planning to apply this just before rc2, but then I spaced out,
  so here it is right _after_ rc2 instead.

  As Kirill suggested as a possibility, I could have decided to only
  merge the first two patches, and leave the old interfaces for
  compatibility, but I'd rather get it all done and any out-of-tree
  modules and patches can trivially do the converstion while still also
  working with older kernels, so there is little reason to try to
  maintain the redundant legacy model.    - Linus ]

* PAGE_CACHE_SIZE-removal:
  mm: drop PAGE_CACHE_* and page_cache_{get,release} definition
  mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage
  mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
2016-04-04 10:50:24 -07:00
Kirill A. Shutemov
09cbfeaf1a mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
ago with promise that one day it will be possible to implement page
cache with bigger chunks than PAGE_SIZE.

This promise never materialized.  And unlikely will.

We have many places where PAGE_CACHE_SIZE assumed to be equal to
PAGE_SIZE.  And it's constant source of confusion on whether
PAGE_CACHE_* or PAGE_* constant should be used in a particular case,
especially on the border between fs and mm.

Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
breakage to be doable.

Let's stop pretending that pages in page cache are special.  They are
not.

The changes are pretty straight-forward:

 - <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;

 - <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>;

 - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};

 - page_cache_get() -> get_page();

 - page_cache_release() -> put_page();

This patch contains automated changes generated with coccinelle using
script below.  For some reason, coccinelle doesn't patch header files.
I've called spatch for them manually.

The only adjustment after coccinelle is revert of changes to
PAGE_CAHCE_ALIGN definition: we are going to drop it later.

There are few places in the code where coccinelle didn't reach.  I'll
fix them manually in a separate patch.  Comments and documentation also
will be addressed with the separate patch.

virtual patch

@@
expression E;
@@
- E << (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E

@@
expression E;
@@
- E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E

@@
@@
- PAGE_CACHE_SHIFT
+ PAGE_SHIFT

@@
@@
- PAGE_CACHE_SIZE
+ PAGE_SIZE

@@
@@
- PAGE_CACHE_MASK
+ PAGE_MASK

@@
expression E;
@@
- PAGE_CACHE_ALIGN(E)
+ PAGE_ALIGN(E)

@@
expression E;
@@
- page_cache_get(E)
+ get_page(E)

@@
expression E;
@@
- page_cache_release(E)
+ put_page(E)

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-04-04 10:41:08 -07:00