|
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v4 00/11] x86/dma: RIP MTRR and dma write-combine API rename
From: "Luis R. Rodriguez" <mcgrof@xxxxxxxx> Ingo, This is my pending series of patches for both write-combining and moving Linux' use of MTRR into the grave. It combines three set of straggler patch series which have been pending integration for a while now. The rename patches do not depend in any way with the MTRR patches but I've combined them here as they are all pending and relating to write-combining. I explain why integration of such patches has been delayed but also provide reasoning for why I believe its time to merge them. 1) The DMA API rename for write-combining goes with the old naming convention defines added as suggested by you for any possible stragglers which may come up as this goes through and gets merged. We can remove the old define mappings after a release once this gets sucked in and things settle. These patches have been in Boris tree for a while but I keep having to refresh them as the kernel moves on, the addition of the old mapping should allow us to merge this without any collateral. 2) The PCI driver changes go with Tomi Valkeinen's Acks as well as Arnd Bergmann's own Acks for the PCI and asm-generic changes. This series was technically acknowledged by Bjorn to be correct and acceptable but his preference was for this to not use EXPORT_SYMBOL_GPL() as not *all* write-combine APIs are using EXPORT_SYMBOL_GPL(). Our goal on x86 though is to not deal with bug reports for new PAT APIs [0] and since its now clear through documentation that its up to the maintainers / developers if they decide to use EXPORT_SYMBOL_GPL() for new *features* [1] I keep that practice in alignment with our own x86 goals to avoid bug reports and issues with proprietary drivers on new PAT interfaces. Bjorn was happy for this to go through someone else's tree, in particular Arnd's. Arnd Acked the series [2] but is unable to take these patches in at this time as he's out on paternal leave so sending these through you with the respective Acks. Boris has been hugely instrumental on helping review all MTRR related series, these were sitting on his queue for a while, but he's also unavailable now as he's on vacation. 3) Unexporting direct MTRR access. This is last patch, I had posted this first on March 2015 when [3] I originally had meshed up all the MTRR work into one giant series. I ending up splitting up all the work into *over* 12 series. Now that all the work is merged except these few patches I've combined that patch as the last part of this series. I've amended an obituary note for MTRR regarding platform firmware access to MTRR based on recent discussions [4] and updated the documentation to reflect the status quo for Linux. All of these patches have been tested by the 0-day bot machine. The only thing *new* here is just my obituary amended documentation note for platform firmware access to MTRRs on the last patch based hugely on review with Toshi. [0] http://lkml.kernel.org/r/1424961893.17007.139.camel@xxxxxxxxxxxxxxxx [1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=582ed8d51e2b6cb8a168c94852bca482685c2509 [2] http://lkml.kernel.org/r/2962702.QXZzP3RbKY@wuerfel [3] http://lkml.kernel.org/r/1426893517-2511-48-git-send-email-mcgrof@xxxxxxxxxxxxxxxx [4] http://lkml.kernel.org/r/1438991330.3109.196.camel@xxxxxx Luis R. Rodriguez (11): PCI: Add pci_ioremap_wc_bar() drivers/video/fbdev/i740fb: Use arch_phys_wc_add() and pci_ioremap_wc_bar() drivers/video/fbdev/kyrofb: Use arch_phys_wc_add() and pci_ioremap_wc_bar() drivers/video/fbdev/gxt4500: Use pci_ioremap_wc_bar() to map framebuffer PCI: Add pci_iomap_wc() variants drivers/video/fbdev/arkfb.c: Use arch_phys_wc_add() and pci_iomap_wc() drivers/video/fbdev/s3fb: Use arch_phys_wc_add() and pci_iomap_wc() drivers/video/fbdev/vt8623fb: Use arch_phys_wc_add() and pci_iomap_wc() drivers/dma/iop-adma: Use dma_alloc_writecombine() kernel-style dma: rename dma_*_writecombine() to dma_*_wc() mtrr: bury MTRR - unexport mtrr_add() and mtrr_del() Documentation/x86/mtrr.txt | 20 ++++++++-- arch/arm/mach-lpc32xx/phy3250.c | 13 +++--- arch/arm/mach-netx/fb.c | 14 +++---- arch/arm/mach-nspire/clcd.c | 13 +++--- arch/avr32/include/asm/dma-mapping.h | 20 +++++----- arch/avr32/mm/dma-coherent.c | 12 +++--- arch/metag/include/asm/dma-mapping.h | 4 +- arch/metag/kernel/dma.c | 6 +-- arch/x86/kernel/cpu/mtrr/main.c | 2 - drivers/dma/iop-adma.c | 9 +++-- drivers/dma/mv_xor.c | 4 +- drivers/dma/qcom_bam_dma.c | 14 +++---- drivers/gpu/drm/drm_gem_cma_helper.c | 13 +++--- drivers/gpu/drm/omapdrm/omap_dmm_tiler.c | 13 +++--- drivers/gpu/drm/omapdrm/omap_gem.c | 8 ++-- drivers/gpu/drm/sti/sti_cursor.c | 13 +++--- drivers/gpu/drm/sti/sti_gdp.c | 3 +- drivers/gpu/drm/sti/sti_hqvdp.c | 6 +-- drivers/gpu/drm/tegra/gem.c | 11 +++--- drivers/gpu/host1x/cdma.c | 8 ++-- drivers/gpu/host1x/job.c | 10 ++--- drivers/media/platform/coda/coda-bit.c | 10 ++--- drivers/pci/pci.c | 14 +++++++ drivers/video/fbdev/acornfb.c | 4 +- drivers/video/fbdev/amba-clcd-versatile.c | 14 +++---- drivers/video/fbdev/amba-clcd.c | 4 +- drivers/video/fbdev/arkfb.c | 36 +++-------------- drivers/video/fbdev/atmel_lcdfb.c | 9 +++-- drivers/video/fbdev/ep93xx-fb.c | 9 ++--- drivers/video/fbdev/gbefb.c | 8 ++-- drivers/video/fbdev/gxt4500.c | 2 +- drivers/video/fbdev/i740fb.c | 35 +++------------- drivers/video/fbdev/imxfb.c | 12 +++--- drivers/video/fbdev/kyro/fbdev.c | 33 ++++++---------- drivers/video/fbdev/mx3fb.c | 9 ++--- drivers/video/fbdev/nuc900fb.c | 8 ++-- drivers/video/fbdev/omap/lcdc.c | 16 ++++---- drivers/video/fbdev/pxa168fb.c | 8 ++-- drivers/video/fbdev/pxafb.c | 4 +- drivers/video/fbdev/s3c-fb.c | 7 ++-- drivers/video/fbdev/s3c2410fb.c | 8 ++-- drivers/video/fbdev/s3fb.c | 35 +++------------- drivers/video/fbdev/sa1100fb.c | 8 ++-- drivers/video/fbdev/vt8623fb.c | 31 +++------------ include/asm-generic/pci_iomap.h | 14 +++++++ include/linux/dma-mapping.h | 16 ++++---- include/linux/pci.h | 1 + include/video/kyro.h | 4 +- lib/pci_iomap.c | 66 +++++++++++++++++++++++++++++++ sound/arm/pxa2xx-pcm-lib.c | 20 ++++------ sound/soc/fsl/imx-pcm-fiq.c | 10 ++--- sound/soc/nuc900/nuc900-pcm.c | 6 +-- sound/soc/omap/omap-pcm.c | 12 ++---- 53 files changed, 331 insertions(+), 358 deletions(-) -- 2.4.3 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
|
 |
Lists.xenproject.org is hosted with RackSpace, monitoring our |