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* drm/ttm: flip the switch, and convert to dma_fenceMaarten Lankhorst2014-09-021-24/+2
| | | | Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
* drm/ttm: kill fence_lockMaarten Lankhorst2014-09-011-3/+0
| | | | | | | | No users are left, kill it off! :D Conversion to the reservation api is next on the list, after that the functionality can be restored with rcu. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
* drm/ttm: move fpfn and lpfn into each placement v2Christian König2014-08-271-2/+1
| | | | | | | | | This allows us to more fine grained specify where to place the buffer object. v2: rebased on drm-next, add bochs changes as well Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
* drm/ttm: expose CPU address of DMA-allocated pagesAlexandre Courbot2014-08-101-0/+2
| | | | | | | | | | Pages allocated using the DMA API have a coherent memory mapping. Make this mapping visible to drivers so they can decide to use it instead of creating their own redundant one. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Acked-by: David Airlie <airlied@linux.ie> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
* drm/ttm: fix handling of TTM_PL_FLAG_TOPDOWN v2Christian König2014-07-081-0/+2
| | | | | | | | | | | bo->mem.placement is not initialized when ttm_bo_man_get_node is called, so the flag had no effect at all. v2: change nouveau and vmwgfx as well Signed-off-by: Christian König <christian.koenig@amd.com> Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/ttm: remove declaration of ttm_tt_cache_flushAlexandre Courbot2014-07-081-12/+0
| | | | | | | | | | | | | | ttm_tt_cache_flush's implementation was removed in 2009 by commit c9c97b8c, but its declaration has been hiding in ttm_bo_driver.h since then. It has been surviving in the dark for too long now ; give it the mercy blow. Reviewed-by: Thierry Reding <treding@nvidia.com> Reviewed-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
* drm/ttm: Hide the implementation details of reservationThomas Hellstrom2014-04-041-18/+29
| | | | | Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com>
* drm: init TTM dev_mapping in ttm_bo_device_init()David Herrmann2014-03-161-0/+2
| | | | | | | | | | | | | | With dev->anon_inode we have a global address_space ready for operation right from the beginning. Therefore, there is no need to do a delayed setup with TTM. Instead, set dev_mapping during initialization in ttm_bo_device_init() and remove any "if (dev_mapping)" conditions. Cc: Dave Airlie <airlied@redhat.com> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com> Cc: Alex Deucher <alexdeucher@gmail.com> Cc: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
* drm/ttm: Correctly set page mapping and -index membersThomas Hellstrom2014-01-081-0/+9
| | | | | | | | Needed for some vm operations; most notably unmap_mapping_range() with even_cows = 0. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com>
* drm/ttm: convert to unified vma offset managerDavid Herrmann2013-07-251-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the new vma-manager infrastructure. This doesn't change any implementation details as the vma-offset-manager is nearly copied 1-to-1 from TTM. The vm_lock is moved into the offset manager so we can drop it from TTM. During lookup, we use the vma locking helpers to take a reference to the found object. In all other scenarios, locking stays the same as before. We always guarantee that drm_vma_offset_remove() is called only during destruction. Hence, helpers like drm_vma_node_offset_addr() are always safe as long as the node has a valid offset. This also drops the addr_space_offset member as it is a copy of vm_start in vma_node objects. Use the accessor functions instead. v4: - remove vm_lock - use drm_vma_offset_lock_lookup() to protect lookup (instead of vm_lock) Cc: Dave Airlie <airlied@redhat.com> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com> Cc: Martin Peres <martin.peres@labri.fr> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@gmail.com>
* drm/ttm: inline ttm_bo_reserve and related callsMaarten Lankhorst2013-06-281-70/+105
| | | | | | | Makes lockdep a lot more useful. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/ttm: make ttm reservation calls behave like reservation callsMaarten Lankhorst2013-06-281-9/+23
| | | | | | | | | | | This commit converts the source of the val_seq counter to the ww_mutex api. The reservation objects are converted later, because there is still a lockdep splat in nouveau that has to resolved first. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Reviewed-by: Jerome Glisse <jglisse@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* ttm: export functions to allow qxl do its own iomappingDave Airlie2013-04-121-0/+4
| | | | | | | | qxl wants to use io mapping like i915 gem does, for now just export the symbols so the driver can implement atomic page maps using io mapping. Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/ttm: unexport ttm_bo_wait_unreservedMaarten Lankhorst2013-01-151-12/+0
| | | | | | | | All legitimate users of this function outside ttm_bo.c are gone, now it's only an implementation detail. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Reviewed-by: Jerome Glisse <jglisse@redhat.com>
* drm/ttm: add ttm_bo_reserve_slowpathMaarten Lankhorst2013-01-151-0/+30
| | | | | | | | | | Instead of dropping everything, waiting for the bo to be unreserved and trying over, a better strategy would be to do a blocking wait. This can be mapped a lot better to a mutex_lock-like call. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Reviewed-by: Jerome Glisse <jglisse@redhat.com>
* drm/ttm: remove lru_lock around ttm_bo_reserveMaarten Lankhorst2013-01-151-15/+4
| | | | | | | | | | There should no longer be assumptions that reserve will always succeed with the lru lock held, so we can safely break the whole atomic reserve/lru thing. As a bonus this fixes most lockdep annotations for reservations. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Reviewed-by: Jerome Glisse <jglisse@redhat.com>
* drm/ttm: remove no_wait_reserve, v3Maarten Lankhorst2012-12-101-12/+7
| | | | | | | | | | | | | | | | | | | | | | All items on the lru list are always reservable, so this is a stupid thing to keep. Not only that, it is used in a way which would guarantee deadlocks if it were ever to be set to block on reserve. This is a lot of churn, but mostly because of the removal of the argument which can be nested arbitrarily deeply in many places. No change of code in this patch except removal of the no_wait_reserve argument, the previous patch removed the use of no_wait_reserve. v2: - Warn if -EBUSY is returned on reservation, all objects on the list should be reservable. Adjusted patch slightly due to conflicts. v3: - Focus on no_wait_reserve removal only. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/ttm: alter cpu_writers to return -EBUSY in ttm_execbuf_util reservationsMaarten Lankhorst2012-11-201-14/+0
| | | | | | | | | This is similar to other platforms that don't allow command submission to buffers locked on the cpu. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/ttm: remove sync_arg from driver functionsMaarten Lankhorst2012-11-201-3/+3
| | | | | | Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Reviewed-By: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/ttm: remove sync_obj_arg from ttm_bo_move_accel_cleanupMaarten Lankhorst2012-11-201-3/+0
| | | | | | Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Reviewed-By: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/ttm: remove ttm_bo_device->nice_modeMarcin Slusarz2012-11-201-3/+0
| | | | | | | | It's unused. Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel ↵David Howells2012-10-021-8/+8
| | | | | | | | | | | | system headers Convert #include "..." to #include <path/...> in kernel system headers. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
* drm/ttm: remove stale declaration and fieldIlija Hadzic2012-07-241-3/+0
| | | | | | | | | | Patch 649bf3ca77343e3be1e0af8e21356fa569b1abd9 has completely removed ttm_backend structure. Remove lingering declaration and related (now stale) field in ttm_tt structure, CC: Jerome Glisse <jglisse at redhat.com> Signed-off-by: Ilija Hadzic <ihadzic at research.bell-labs.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* ttm: add prime sharing support to TTM (v2)Dave Airlie2012-05-231-0/+2
| | | | | | | | | | | | | This adds the ability for ttm common code to take an SG table and use it as the backing for a slave TTM object. The drivers can then populate their GTT tables using the SG object. v2: make sure to setup VM for sg bos as well. Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Jerome Glisse <jglisse@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* ttm: fix agp since ttm tt reworkJerome Glisse2012-01-061-0/+2
| | | | | | | | | | | | ttm tt rework modified the way we allocate and populate the ttm_tt structure, the AGP side was missing some bit to properly work. Fix those and fix radeon and nouveau AGP support. Tested on radeon only so far. Signed-off-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/ttm: simplify memory accounting for ttm user v2Jerome Glisse2011-12-061-5/+0
| | | | | | | | | | | | | Provide helper function to compute the kernel memory size needed for each buffer object. Move all the accounting inside ttm, simplifying driver and avoiding code duplication accross them. v2 fix accounting of ghost object, one would have thought that i would have run into the issue since a longtime but it seems ghost object are rare when you have plenty of vram ;) Signed-off-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
* drm/ttm: isolate dma data from ttm_tt V4Jerome Glisse2011-12-061-3/+29
| | | | | | | | | | | | | | Move dma data to a superset ttm_dma_tt structure which herit from ttm_tt. This allow driver that don't use dma functionalities to not have to waste memory for it. V2 Rebase on top of no memory account changes (where/when is my delorean when i need it ?) V3 Make sure page list is initialized empty V4 typo/syntax fixes Signed-off-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
* drm/ttm: provide dma aware ttm page pool code V9Konrad Rzeszutek Wilk2011-12-061-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In TTM world the pages for the graphic drivers are kept in three different pools: write combined, uncached, and cached (write-back). When the pages are used by the graphic driver the graphic adapter via its built in MMU (or AGP) programs these pages in. The programming requires the virtual address (from the graphic adapter perspective) and the physical address (either System RAM or the memory on the card) which is obtained using the pci_map_* calls (which does the virtual to physical - or bus address translation). During the graphic application's "life" those pages can be shuffled around, swapped out to disk, moved from the VRAM to System RAM or vice-versa. This all works with the existing TTM pool code - except when we want to use the software IOTLB (SWIOTLB) code to "map" the physical addresses to the graphic adapter MMU. We end up programming the bounce buffer's physical address instead of the TTM pool memory's and get a non-worky driver. There are two solutions: 1) using the DMA API to allocate pages that are screened by the DMA API, or 2) using the pci_sync_* calls to copy the pages from the bounce-buffer and back. This patch fixes the issue by allocating pages using the DMA API. The second is a viable option - but it has performance drawbacks and potential correctness issues - think of the write cache page being bounced (SWIOTLB->TTM), the WC is set on the TTM page and the copy from SWIOTLB not making it to the TTM page until the page has been recycled in the pool (and used by another application). The bounce buffer does not get activated often - only in cases where we have a 32-bit capable card and we want to use a page that is allocated above the 4GB limit. The bounce buffer offers the solution of copying the contents of that 4GB page to an location below 4GB and then back when the operation has been completed (or vice-versa). This is done by using the 'pci_sync_*' calls. Note: If you look carefully enough in the existing TTM page pool code you will notice the GFP_DMA32 flag is used - which should guarantee that the provided page is under 4GB. It certainly is the case, except this gets ignored in two cases: - If user specifies 'swiotlb=force' which bounces _every_ page. - If user is using a Xen's PV Linux guest (which uses the SWIOTLB and the underlaying PFN's aren't necessarily under 4GB). To not have this extra copying done the other option is to allocate the pages using the DMA API so that there is not need to map the page and perform the expensive 'pci_sync_*' calls. This DMA API capable TTM pool requires for this the 'struct device' to properly call the DMA API. It also has to track the virtual and bus address of the page being handed out in case it ends up being swapped out or de-allocated - to make sure it is de-allocated using the proper's 'struct device'. Implementation wise the code keeps two lists: one that is attached to the 'struct device' (via the dev->dma_pools list) and a global one to be used when the 'struct device' is unavailable (think shrinker code). The global list can iterate over all of the 'struct device' and its associated dma_pool. The list in dev->dma_pools can only iterate the device's dma_pool. /[struct device_pool]\ /---------------------------------------------------| dev | / +-------| dma_pool | /-----+------\ / \--------------------/ |struct device| /-->[struct dma_pool for WC]</ /[struct device_pool]\ | dma_pools +----+ /-| dev | | ... | \--->[struct dma_pool for uncached]<-/--| dma_pool | \-----+------/ / \--------------------/ \----------------------------------------------/ [Two pools associated with the device (WC and UC), and the parallel list containing the 'struct dev' and 'struct dma_pool' entries] The maximum amount of dma pools a device can have is six: write-combined, uncached, and cached; then there are the DMA32 variants which are: write-combined dma32, uncached dma32, and cached dma32. Currently this code only gets activated when any variant of the SWIOTLB IOMMU code is running (Intel without VT-d, AMD without GART, IBM Calgary and Xen PV with PCI devices). Tested-by: Michel Dänzer <michel@daenzer.net> [v1: Using swiotlb_nr_tbl instead of swiotlb_enabled] [v2: Major overhaul - added 'inuse_list' to seperate used from inuse and reorder the order of lists to get better performance.] [v3: Added comments/and some logic based on review, Added Jerome tag] [v4: rebase on top of ttm_tt & ttm_backend merge] [v5: rebase on top of ttm memory accounting overhaul] [v6: New rebase on top of more memory accouting changes] [v7: well rebase on top of no memory accounting changes] [v8: make sure pages list is initialized empty] [v9: calll ttm_mem_global_free_page in unpopulate for accurate accountg] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Jerome Glisse <jglisse@redhat.com> Acked-by: Thomas Hellstrom <thellstrom@vmware.com>
* drm/ttm: introduce callback for ttm_tt populate & unpopulate V4Jerome Glisse2011-12-061-18/+23
| | | | | | | | | | | | | | | | | | Move the page allocation and freeing to driver callback and provide ttm code helper function for those. Most intrusive change, is the fact that we now only fully populate an object this simplify some of code designed around the page fault design. V2 Rebase on top of memory accounting overhaul V3 New rebase on top of more memory accouting changes V4 Rebase on top of no memory account changes (where/when is my delorean when i need it ?) Signed-off-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
* drm/ttm: merge ttm_backend and ttm_tt V5Jerome Glisse2011-12-061-63/+41
| | | | | | | | | | | | | | | | | ttm_backend will only exist with a ttm_tt, and ttm_tt will only be of interest when bound to a backend. Merge them to avoid code and data duplication. V2 Rebase on top of memory accounting overhaul V3 Rebase on top of more memory accounting changes V4 Rebase on top of no memory account changes (where/when is my delorean when i need it ?) V5 make sure ttm is unbound before destroying, change commit message on suggestion from Tormod Volden Signed-off-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
* drm/ttm: remove unused backend flags fieldJerome Glisse2011-12-061-2/+0
| | | | | | | | This field is not use by any of the driver just drop it. Signed-off-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
* drm/ttm: remove split btw highmen and lowmem pageJerome Glisse2011-12-061-7/+0
| | | | | | | | | | | | Split btw highmem and lowmem page was rendered useless by the pool code. Remove it. Note further cleanup would change the ttm page allocation helper to actualy take an array instead of relying on list this could drasticly reduce the number of function call in the common case of allocation whole buffer. Signed-off-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
* drm/ttm: remove userspace backed ttm object supportJerome Glisse2011-12-061-24/+0
| | | | | | | | | | This was never use in none of the driver, properly using userspace page for bo would need more code (vma interaction mostly). Removing this dead code in preparation of ttm_tt & backend merge. Signed-off-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
* ttm: Fix spelling mistakes and remove unused #ifdefKonrad Rzeszutek Wilk2011-06-211-3/+3
| | | | | | | | | . and some comments to make it easier to understand. Ackedby: Randy Dunlap <randy.dunlap@oracle.com> [v2: Added some more updates from Randy Dunlap] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6Linus Torvalds2011-04-071-3/+3
|\ | | | | | | | | * 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6: Fix common misspellings
| * Fix common misspellingsLucas De Marchi2011-03-311-3/+3
| | | | | | | | | | | | Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
* | drm: fix "persistant" typoJan Engelhardt2011-04-051-2/+2
|/ | | | | Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Dave Airlie <airlied@redhat.com>
* Revert "ttm: Include the 'struct dev' when using the DMA API."Dave Airlie2011-02-231-1/+0
| | | | | | | | | This reverts commit 5a893fc28f0393adb7c885a871b8c59e623fd528. This causes a use after free in the ttm free alloc pages path, when it tries to get the be after the be has been destroyed. Signed-off-by: Dave Airlie <airlied@redhat.com>
* Merge branch 'stable/ttm.pci-api.v5' of ↵Dave Airlie2011-02-231-1/+6
|\ | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen into drm-next * 'stable/ttm.pci-api.v5' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: ttm: Include the 'struct dev' when using the DMA API. nouveau/ttm/PCIe: Use dma_addr if TTM has set it. radeon/ttm/PCIe: Use dma_addr if TTM has set it. ttm: Expand (*populate) to support an array of DMA addresses. ttm: Utilize the DMA API for pages that have TTM_PAGE_FLAG_DMA32 set. ttm: Introduce a placeholder for DMA (bus) addresses.
| * ttm: Include the 'struct dev' when using the DMA API.Konrad Rzeszutek Wilk2011-02-221-0/+1
| | | | | | | | | | | | | | | | | | | | This makes the accounting when using 'debug_dma_dump_mappings()' and CONFIG_DMA_API_DEBUG=y be assigned to the correct device instead of 'fallback'. No functional change - just cosmetic. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * ttm: Expand (*populate) to support an array of DMA addresses.Konrad Rzeszutek Wilk2011-01-271-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We pass in the array of ttm pages to be populated in the GART/MM of the card (or AGP). Patch titled: "ttm: Utilize the DMA API for pages that have TTM_PAGE_FLAG_DMA32 set." uses the DMA API to make those pages have a proper DMA addresses (in the situation where page_to_phys or virt_to_phys do not give use the DMA (bus) address). Since we are using the DMA API on those pages, we should pass in the DMA address to this function so it can save it in its proper fields (later patches use it). [v2: Added reviewed-by tag] Reviewed-by: Thomas Hellstrom <thellstrom@shipmail.org> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Tested-by: Ian Campbell <ian.campbell@citrix.com>
| * ttm: Introduce a placeholder for DMA (bus) addresses.Konrad Rzeszutek Wilk2011-01-271-0/+2
| | | | | | | | | | | | | | | | | | | | This is right now limited to only non-pool constructs. [v2: Fixed indentation issues, add review-by tag] Reviewed-by: Thomas Hellstrom <thomas@shipmail.org> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Tested-by: Ian Campbell <ian.campbell@citrix.com>
* | drm/ttm: Fix up io_mem_reserve / io_mem_free callingThomas Hellstrom2010-11-221-49/+55
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch attempts to fix up shortcomings with the current calling sequences. 1) There's a fastpath where no locking occurs and only io_mem_reserved is called to obtain needed info for mapping. The fastpath is set per memory type manager. 2) If the fastpath is disabled, io_mem_reserve and io_mem_free will be exactly balanced and not called recursively for the same struct ttm_mem_reg. 3) Optionally the driver can choose to enable a per memory type manager LRU eviction mechanism that, when io_mem_reserve returns -EAGAIN will attempt to kill user-space mappings of memory in that manager to free up needed resources Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Ben Skeggs <bskeggs@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* | drm/ttm/vmwgfx: Have TTM manage the validation sequence.Thomas Hellstrom2010-11-221-0/+2
| | | | | | | | | | | | | | | | Rather than having the driver supply the validation sequence, leave that responsibility to TTM. This saves some confusion and a function argument. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* | drm/ttm: Improved fencing of buffer object listsThomas Hellstrom2010-11-221-0/+10
| | | | | | | | | | | | | | | | | | Drastically reduce the number of spin lock / unlock operations by performing unreserving and fencing under global locks. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jerome Glisse <j.glisse@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* | drm/ttm/radeon/nouveau: Kill the bo lock in favour of a bo device fence_lockThomas Hellstrom2010-11-221-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The bo lock used only to protect the bo sync object members, and since it is a per bo lock, fencing a buffer list will see a lot of locks and unlocks. Replace it with a per-device lock that protects the sync object members on *all* bos. Reading and setting these members will always be very quick, so the risc of heavy lock contention is microscopic. Note that waiting for sync objects will always take place outside of this lock. The bo device fence lock will eventually be replaced with a seqlock / rcu mechanism so we can determine that a bo is idle under a rcu / read seqlock. However this change will allow us to batch fencing and unreserving of buffers with a minimal amount of locking. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jerome Glisse <j.glisse@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* | drm/ttm: Don't deadlock on recursive multi-bo reservationsThomas Hellstrom2010-11-221-3/+22
| | | | | | | | | | | | | | | | | | Add an aid for the driver to detect deadlocks on multi-bo reservations Update documentation. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jerome Glisse <j.glisse@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* | drm/ttm: Add a bo list reserve fastpath (v2)Dave Airlie2010-11-221-0/+14
|/ | | | | | | | | | | | Makes it possible to reserve a list of buffer objects with a single spin lock / unlock if there is no contention. Should improve cpu usage on SMP kernels. v2: Initialize private list members on reserve and don't call ttm_bo_list_ref_sub() with zero put_count. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/ttm: Documentation updateThomas Hellstrom2010-11-091-5/+74
| | | | | | | | Remove an obsolete comment about mm nodes. Document the new bo range manager interface. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/ttm: Avoid using the ttm_mem_type_manager::put_locked functionThomas Hellstrom2010-10-211-2/+0
| | | | | | | Release the lru spinlock early. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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