kernel/drivers/char/agp/intel-gtt.c, branch 0x221E-v0.0.1-v6.19

agp/intel-gtt: Add intel_gmch_gtt_read_entry()

2025-04-01T23:16:12Z

i915 wants to read out the PTE(s) populated by the BIOS/GOP to verify that the framebuffer is in the correct location. Introduce intel_gmch_gtt_read_entry() that reads out the PTE and decodes it to a somewhat abstract form. For now we just return the dma_addr, present bit, and local memory bit. I didn't bother with the snoop bit/etc. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20250313140838.29742-4-ville.syrjala@linux.intel.com Reviewed-by: Jouni Högander

agp: add missing MODULE_DESCRIPTION() macros

2024-06-24T06:20:58Z

make allmodconfig && make W=1 C=1 reports: WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/char/agp/amd64-agp.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/char/agp/intel-agp.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/char/agp/intel-gtt.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/char/agp/sis-agp.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/char/agp/via-agp.o Add the missing invocations of the MODULE_DESCRIPTION() macro. Signed-off-by: Jeff Johnson Signed-off-by: Dave Airlie Link: https://patchwork.freedesktop.org/patch/msgid/20240603-md-agp-v1-1-9a1582114ced@quicinc.com

drm: move intel-gtt.h under include/drm/intel

2024-05-31T13:10:50Z

Clean up the top level include/drm directory by grouping all the Intel specific files under a common subdirectory. Cc: Daniel Vetter Cc: Dave Airlie Cc: Lucas De Marchi Reviewed-by: Andi Shyti Acked-by: Lucas De Marchi Acked-by: Rodrigo Vivi Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/ae224504d99cc6428da6dced9dcde2b7953624ef.1717075103.git.jani.nikula@intel.com

Merge tag 'iommu-updates-v5.20-or-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

2022-08-06T17:42:38Z

Pull iommu updates from Joerg Roedel: - The most intrusive patch is small and changes the default allocation policy for DMA addresses. Before the change the allocator tried its best to find an address in the first 4GB. But that lead to performance problems when that space gets exhaused, and since most devices are capable of 64-bit DMA these days, we changed it to search in the full DMA-mask range from the beginning. This change has the potential to uncover bugs elsewhere, in the kernel or the hardware. There is a Kconfig option and a command line option to restore the old behavior, but none of them is enabled by default. - Add Robin Murphy as reviewer of IOMMU code and maintainer for the dma-iommu and iova code - Chaning IOVA magazine size from 1032 to 1024 bytes to save memory - Some core code cleanups and dead-code removal - Support for ACPI IORT RMR node - Support for multiple PCI domains in the AMD-Vi driver - ARM SMMU changes from Will Deacon: - Add even more Qualcomm device-tree compatible strings - Support dumping of IMP DEF Qualcomm registers on TLB sync timeout - Fix reference count leak on device tree node in Qualcomm driver - Intel VT-d driver updates from Lu Baolu: - Make intel-iommu.h private - Optimize the use of two locks - Extend the driver to support large-scale platforms - Cleanup some dead code - MediaTek IOMMU refactoring and support for TTBR up to 35bit - Basic support for Exynos SysMMU v7 - VirtIO IOMMU driver gets a map/unmap_pages() implementation - Other smaller cleanups and fixes * tag 'iommu-updates-v5.20-or-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (116 commits) iommu/amd: Fix compile warning in init code iommu/amd: Add support for AVIC when SNP is enabled iommu/amd: Simplify and Consolidate Virtual APIC (AVIC) Enablement ACPI/IORT: Fix build error implicit-function-declaration drivers: iommu: fix clang -wformat warning iommu/arm-smmu: qcom_iommu: Add of_node_put() when breaking out of loop iommu/arm-smmu-qcom: Add SM6375 SMMU compatible dt-bindings: arm-smmu: Add compatible for Qualcomm SM6375 MAINTAINERS: Add Robin Murphy as IOMMU SUBSYTEM reviewer iommu/amd: Do not support IOMMUv2 APIs when SNP is enabled iommu/amd: Do not support IOMMU_DOMAIN_IDENTITY after SNP is enabled iommu/amd: Set translation valid bit only when IO page tables are in use iommu/amd: Introduce function to check and enable SNP iommu/amd: Globally detect SNP support iommu/amd: Process all IVHDs before enabling IOMMU features iommu/amd: Introduce global variable for storing common EFR and EFR2 iommu/amd: Introduce Support for Extended Feature 2 Register iommu/amd: Change macro for IOMMU control register bit shift to decimal value iommu/exynos: Enable default VM instance on SysMMU v7 iommu/exynos: Add SysMMU v7 register set ...

agp/intel: Use per device iommu check

2022-07-15T08:21:29Z

The IOMMU subsystem has already provided an interface to query whether the IOMMU hardware is enabled for a specific device. This changes the check from Intel specific intel_iommu_gfx_mapped (globally exported by the Intel IOMMU driver) to probing the presence of IOMMU on a specific device using the generic device_iommu_mapped(). This follows commit cca084692394a ("drm/i915: Use per device iommu check") which converted drm/i915 driver to use device_iommu_mapped(). Signed-off-by: Lu Baolu Reviewed-by: Christoph Hellwig Reviewed-by: Jason Gunthorpe Reviewed-by: Steve Wahl Link: https://lore.kernel.org/r/20220514014322.2927339-3-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel

agp/intel: Rename intel-gtt symbols

2022-06-22T22:52:55Z

Exporting the symbols like intel_gtt_* creates some confusion inside i915 that has symbols named similarly. In an attempt to isolate platforms needing intel-gtt.ko, commit 7a5c922377b4 ("drm/i915/gt: Split intel-gtt functions by arch") moved way too much inside gt/intel_gt_gmch.c, even the functions that don't callout to this module. Rename the symbols to make the separation clear. Signed-off-by: Lucas De Marchi Reviewed-by: Tvrtko Ursulin Link: https://patchwork.freedesktop.org/patch/msgid/20220617230559.2109427-1-lucas.demarchi@intel.com

agp/intel: Remove usage of the deprecated "pci-dma-compat.h" API

2022-02-25T16:19:21Z

In [1], Christoph Hellwig has proposed to remove the wrappers in include/linux/pci-dma-compat.h. Some reasons why this API should be removed have been given by Julia Lawall in [2]. A coccinelle script has been used to perform the needed transformation. It can be found in [3]. [1]: https://lore.kernel.org/kernel-janitors/20200421081257.GA131897@infradead.org/ [2]: https://lore.kernel.org/kernel-janitors/alpine.DEB.2.22.394.2007120902170.2424@hadrien/ [3]: https://lore.kernel.org/kernel-janitors/20200716192821.321233-1-christophe.jaillet@wanadoo.fr/ Signed-off-by: Christophe JAILLET Reviewed-by: Arnd Bergmann Signed-off-by: Christoph Hellwig

agp/intel-gtt: reduce intel-gtt dependencies more

2021-11-15T17:20:14Z

Don't include stuff on behalf of users if they're not strictly necessary for the header. Cc: Andy Shevchenko Signed-off-by: Jani Nikula Acked-by: Daniel Vetter Acked-by: Andy Shevchenko Reviewed-by: Lucas De Marchi Link: https://patchwork.freedesktop.org/patch/msgid/7bcaa1684587b9b008d3c41468fb40e63c54fbc7.1636977089.git.jani.nikula@intel.com

agp/intel: Fix a memory leak on module initialisation failure

2020-05-22T11:33:40Z

In intel_gtt_setup_scratch_page(), pointer "page" is not released if pci_dma_mapping_error() return an error, leading to a memory leak on module initialisation failure. Simply fix this issue by freeing "page" before return. Fixes: 0e87d2b06cb46 ("intel-gtt: initialize our own scratch page") Signed-off-by: Qiushi Wu Reviewed-by: Chris Wilson Signed-off-by: Chris Wilson Link: https://patchwork.freedesktop.org/patch/msgid/20200522083451.7448-1-chris@chris-wilson.co.uk

drm/i915: Refactor setting dma info to a common helper

2020-04-18T06:49:11Z

DMA_MASK bit values are different for different generations. This will become more difficult to manage over time with the open coded usage of different versions of the device. Fix by: disallow setting of dma mask in AGP path (< GEN(5) for i915, add dma_mask_size to the device info configuration, updating open code call sequence to the latest interface, refactoring into a common function for setting the dma segment and mask info Reviewed-by: Chris Wilson Signed-off-by: Michael J. Ruhl cc: Brian Welty cc: Daniele Ceraolo Spurio Signed-off-by: Chris Wilson Link: https://patchwork.freedesktop.org/patch/msgid/20200417195107.68732-1-michael.j.ruhl@intel.com