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2022-01-04filemap: Convert filemap_range_uptodate to foliosMatthew Wilcox (Oracle)1-8/+8
The only caller was already passing a head page, so this simply avoids a call to compound_head(). Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04filemap: Convert filemap_create_page to folioMatthew Wilcox (Oracle)1-19/+20
This is all internal to filemap and saves 100 bytes of text. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04filemap: Convert filemap_read_page to take a folioMatthew Wilcox (Oracle)1-9/+9
One of the callers already had a folio; the other two grow by a few bytes, but filemap_read_page() shrinks by 50 bytes for a net reduction of 27 bytes. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04filemap: Convert find_get_pages_contig to foliosMatthew Wilcox (Oracle)1-9/+8
None of the callers of find_get_pages_contig() want tail pages. They all use order-0 pages today, but if they were converted, they'd want folios. So just remove the call to find_subpage() instead of replacing it with folio_page(). Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04filemap: Convert filemap_get_read_batch to use foliosMatthew Wilcox (Oracle)1-12/+11
The page cache only stores folios, never tail pages. Saves 29 bytes due to removing calls to compound_head(). Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04filemap: Remove thp_contains()Matthew Wilcox (Oracle)1-9/+0
This function is now unused, so delete it. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04filemap: Convert find_get_entry to return a folioMatthew Wilcox (Oracle)1-74/+72
Convert callers to cope. Saves 580 bytes of kernel text; all five callers are reduced in size. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04filemap: Add filemap_remove_folio and __filemap_remove_folioMatthew Wilcox (Oracle)3-25/+32
Reimplement __delete_from_page_cache() as a wrapper around __filemap_remove_folio() and delete_from_page_cache() as a wrapper around filemap_remove_folio(). Remove the EXPORT_SYMBOL as delete_from_page_cache() was not used by any in-tree modules. Convert page_cache_free_page() into filemap_free_folio(). Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04filemap: Convert tracing of page cache operations to folioMatthew Wilcox (Oracle)2-19/+22
Pass the folio instead of a page. The page was already implicitly a folio as it accessed page->mapping directly. Add the order of the folio to the tracepoint, as this is important information. Also drop printing the address of the struct page as the pfn provides better information than the struct page address. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04filemap: Add filemap_unaccount_folio()Matthew Wilcox (Oracle)2-40/+35
Replace unaccount_page_cache_page() with filemap_unaccount_folio(). The bug handling path could be a bit more robust (eg taking into account the mapcounts of tail pages), but it's really never supposed to happen. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04filemap: Convert page_cache_delete to take a folioMatthew Wilcox (Oracle)1-11/+11
It was already assuming a head page, so this is a straightforward conversion. Convert the one caller to call page_folio(), even though it must currently be passing in a head page. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04filemap: Add folio_put_wait_locked()Matthew Wilcox (Oracle)3-24/+26
Convert all three callers of put_and_wait_on_page_locked() to folio_put_wait_locked(). This shrinks the kernel overall by 19 bytes. filemap_update_page() shrinks by 19 bytes while __migration_entry_wait() is unchanged. folio_put_wait_locked() is 14 bytes smaller than put_and_wait_on_page_locked(), but pmd_migration_entry_wait() grows by 14 bytes. It removes the assumption from pmd_migration_entry_wait() that pages cannot be larger than a PMD (which is true today, but may be interesting to explore in the future). Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04mm: Add folio_test_pmd_mappable()Matthew Wilcox (Oracle)2-21/+35
Add a predicate to determine if the folio might be mapped by a PMD entry. If CONFIG_TRANSPARENT_HUGEPAGE is disabled, we know it can't be, even if it's large enough. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04iov_iter: Convert iter_xarray to use foliosMatthew Wilcox (Oracle)1-16/+14
Take advantage of how kmap_local_folio() works to simplify the loop. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04iov_iter: Add copy_folio_to_iter()Matthew Wilcox (Oracle)1-0/+7
This wrapper around copy_page_to_iter() works because copy_page_to_iter() handles compound pages correctly. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: William Kucharski <william.kucharski@oracle.com>
2022-01-04dm btree spine: eliminate duplicate le32_to_cpu() in node_check()Joe Thornber1-3/+5
Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2022-01-04dm btree spine: remove extra node_check function declarationJoe Thornber1-4/+0
Should have been removed as part of commit f73e2e70ec48 ("dm btree spine: remove paranoid node_check call in node_prep_for_write()") Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2022-01-04Merge branch kvm-arm64/misc-5.17 into kvmarm-master/nextMarc Zyngier11-24/+70
* kvm-arm64/misc-5.17: : . : Misc fixes and improvements: : - Add minimal support for ARMv8.7's PMU extension : - Constify kvm_io_gic_ops : - Drop kvm_is_transparent_hugepage() prototype : - Drop unused workaround_flags field : - Rework kvm_pgtable initialisation : - Documentation fixes : - Replace open-coded SCTLR_EL1.EE useage with its defined macro : - Sysreg list selftest update to handle PAuth : - Include cleanups : . KVM: arm64: vgic: Replace kernel.h with the necessary inclusions KVM: arm64: Fix comment typo in kvm_vcpu_finalize_sve() KVM: arm64: selftests: get-reg-list: Add pauth configuration KVM: arm64: Fix comment on barrier in kvm_psci_vcpu_on() KVM: arm64: Fix comment for kvm_reset_vcpu() KVM: arm64: Use defined value for SCTLR_ELx_EE KVM: arm64: Rework kvm_pgtable initialisation KVM: arm64: Drop unused workaround_flags vcpu field Signed-off-by: Marc Zyngier <maz@kernel.org>
2022-01-04KVM: arm64: vgic: Replace kernel.h with the necessary inclusionsAndy Shevchenko1-1/+3
arm_vgic.h does not require all the stuff that kernel.h provides. Replace kernel.h inclusion with the list of what is really being used. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20220104151940.55399-1-andriy.shevchenko@linux.intel.com
2022-01-04EDAC/i10nm: Release mdev/mbase when failing to detect HBMQiuxu Zhuo1-0/+9
On systems without HBM (High Bandwidth Memory) mdev/mbase are not released/unmapped. Add the code to release mdev/mbase when failing to detect HBM. [Tony: re-word commit message] Cc: <stable@vger.kernel.org> Fixes: c945088384d0 ("EDAC/i10nm: Add support for high bandwidth memory") Reported-by: kernel test robot <lkp@intel.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com> Link: https://lore.kernel.org/r/20211224091126.1246-1-qiuxu.zhuo@intel.com
2022-01-04Merge tag 'mac80211-next-for-net-next-2022-01-04' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-nextJakub Kicinski5-9/+43
Johannes Berg says: ==================== Just a few more changes: - mac80211: allow non-standard VHT MCSes 10/11 - mac80211: add sleepable station iterator for drivers - nl80211: clarify a comment - mac80211: small cleanup to use typed element helpers * tag 'mac80211-next-for-net-next-2022-01-04' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next: mac80211: use ieee80211_bss_get_elem() nl80211: clarify comment for mesh PLINK_BLOCKED state mac80211: Add stations iterator where the iterator function may sleep mac80211: allow non-standard VHT MCS-10/11 ==================== Link: https://lore.kernel.org/r/20220104153403.69749-1-johannes@sipsolutions.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-01-04swiotlb: Add CONFIG_HAS_IOMEM check around swiotlb_mem_remap()Wei Liu1-0/+7
HAS_IOMEM option may not be selected on some platforms (e.g, s390) and this will cause compilation failure due to missing memremap() implementation. Fix it by stubbing out swiotlb_mem_remap when CONFIG_HAS_IOMEM is not set. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Wei Liu <wei.liu@kernel.org>
2022-01-04ALSA: hda/cs8409: Fix Jack detection after resumeChristian A. Ehrhardt3-1/+8
The suspend code unconditionally sets ->hp_jack_in and ->mic_jack_in to zero but without reporting this status change to the HDA core. To compensate for this, always assume a status change on the first unsol event after boot or resume. Fixes: 424e531b47f8 ("ALSA: hda/cs8409: Ensure Type Detection is only run on startup when necessary") Signed-off-by: Christian A. Ehrhardt <lk@c--e.de> Link: https://lore.kernel.org/r/20211231134432.atwmuzeceqiklcoa@cae.in-ulm.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2022-01-04ALSA: hda/cs8409: Increase delay during jack detectionChristian A. Ehrhardt1-2/+2
Commit c8b4f0865e82 reduced delays related to cs42l42 jack detection. However, the change was too aggressive. As a result internal speakers on DELL Inspirion 3501 are not detected. Increase the delay in cs42l42_run_jack_detect() a bit. Fixes: c8b4f0865e82 ("ALSA: hda/cs8409: Remove unnecessary delays") Signed-off-by: Christian A. Ehrhardt <lk@c--e.de> Link: https://lore.kernel.org/r/20211231131221.itwotyfk5qomn7n6@cae.in-ulm.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2022-01-04erofs: use meta buffers for zmap operationsGao Xiang4-70/+28
Get rid of old erofs_get_meta_page() within zmap operations by using on-stack meta buffers in order to prepare subpage and folio features. Finally, erofs_get_meta_page() is useless. Get rid of it! Link: https://lore.kernel.org/r/20220102040017.51352-6-hsiangkao@linux.alibaba.com Reviewed-by: Yue Hu <huyue2@yulong.com> Reviewed-by: Liu Bo <bo.liu@linux.alibaba.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
2022-01-04erofs: use meta buffers for xattr operationsGao Xiang2-95/+41
Get rid of old erofs_get_meta_page() within xattr operations by using on-stack meta buffers in order to prepare subpage and folio features. Link: https://lore.kernel.org/r/20220102040017.51352-5-hsiangkao@linux.alibaba.com Reviewed-by: Liu Bo <bo.liu@linux.alibaba.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
2022-01-04erofs: use meta buffers for super operationsGao Xiang1-77/+27
Get rid of old erofs_get_meta_page() within super operations by using on-stack meta buffers in order to prepare subpage and folio features. Link: https://lore.kernel.org/r/20220102081317.109797-1-hsiangkao@linux.alibaba.com Reviewed-by: Yue Hu <huyue2@yulong.com> Reviewed-by: Liu Bo <bo.liu@linux.alibaba.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
2022-01-04erofs: use meta buffers for inode operationsGao Xiang2-36/+35
Get rid of old erofs_get_meta_page() within inode operations by using on-stack meta buffers in order to prepare subpage and folio features. Link: https://lore.kernel.org/r/20220102040017.51352-3-hsiangkao@linux.alibaba.com Reviewed-by: Yue Hu <huyue2@yulong.com> Reviewed-by: Liu Bo <bo.liu@linux.alibaba.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
2022-01-04erofs: introduce meta buffer operationsGao Xiang2-21/+90
In order to support subpage and folio for all uncompressed files, introduce meta buffer descriptors, which can be effectively stored on stack, in place of meta page operations. This converts the uncompressed data path to meta buffers. Link: https://lore.kernel.org/r/20220102040017.51352-2-hsiangkao@linux.alibaba.com Reviewed-by: Liu Bo <bo.liu@linux.alibaba.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
2022-01-04fs: dlm: print cluster addr if non-cluster node connectsAlexander Aring1-4/+22
This patch prints the cluster node address if a non-cluster node (according to the dlm config setting) tries to connect. The current hexdump call will print in a different loglevel and only available if dynamic debug is enabled. Additional we using the ip address format strings to print an IETF ip4/6 string represenation. Signed-off-by: Alexander Aring <aahringo@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com>
2022-01-04x86: intel_epb: Allow model specific normal EPB valueSrinivas Pandruvada1-13/+32
The current EPB "normal" is defined as 6 and set whenever power-up EPB value is 0. This setting resulted in the desired out of box power and performance for several CPU generations. But this value is not suitable for AlderLake mobile CPUs, as this resulted in higher uncore power. Since EPB is model specific, this is not unreasonable to have different behavior. Allow a capability where "normal" EPB can be redefined. For AlderLake mobile CPUs this desired normal value is 7. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2022-01-04PCI: qcom-ep: Constify static dw_pcie_ep_opsRikard Falkeborn1-1/+1
The only usage of pci_ep_ops is to assign its address to the ops field in the dw_pcie_ep struct which is a pointer to const struct dw_pcie_ep_ops. Make it const to allow the compiler to put it in read-only memory. Link: https://lore.kernel.org/r/20211204220316.88655-1-rikard.falkeborn@gmail.com Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
2022-01-04PCI: vmd: Honor ACPI _OSC on PCIe featuresKai-Heng Feng1-0/+18
When Samsung PCIe Gen4 NVMe is connected to Intel ADL VMD, the combination causes AER message flood and drags the system performance down. The issue doesn't happen when VMD mode is disabled in BIOS, since AER isn't enabled by acpi_pci_root_create() . When VMD mode is enabled, AER is enabled regardless of _OSC: [ 0.410076] acpi PNP0A08:00: _OSC: platform does not support [AER] ... [ 1.486704] pcieport 10000:e0:06.0: AER: enabled with IRQ 146 Since VMD is an aperture to regular PCIe root ports, honor ACPI _OSC to disable PCIe features accordingly to resolve the issue. Suggested-by: Rafael J. Wysocki <rafael@kernel.org> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215027 Link: https://lore.kernel.org/r/20211203031541.1428904-1-kai.heng.feng@canonical.com Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2022-01-04Merge tag 'mac80211-for-net-2022-01-04' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211Jakub Kicinski4-82/+55
Johannes Berg says: ==================== Two more changes: - mac80211: initialize a variable to avoid using it uninitialized - mac80211 mesh: put some data structures into the container to fix bugs with and not have to deal with allocation failures * tag 'mac80211-for-net-2022-01-04' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211: mac80211: mesh: embedd mesh_paths and mpp_paths into ieee80211_if_mesh mac80211: initialize variable have_higher_than_11mbit ==================== Link: https://lore.kernel.org/r/20220104144449.64937-1-johannes@sipsolutions.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-01-04drm: exynos: dsi: Add mode_set functionJagan Teki1-1/+12
Get the display mode settings via mode_set bridge function instead of explicitly de-reference. Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20211122070633.89219-3-jagan@amarulasolutions.com
2022-01-04drm: exynos: dsi: Convert to bridge driverJagan Teki1-22/+51
Some display panels would come up with a non-DSI output, those can have an option to connect the DSI host by means of interface bridge converter. This DSI to non-DSI interface bridge converter would requires DSI Host to handle drm bridge functionalities in order to DSI Host to Interface bridge. This patch convert the existing to a drm bridge driver with a built-in encoder support for compatibility with existing component drivers. Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20211122070633.89219-2-jagan@amarulasolutions.com
2022-01-04regulator: remove redundant ret variableMinghao Chi1-4/+2
Return value from regmap_update_bits() directly instead of taking this in another redundant variable. Reported-by: Zeal Robot <zealci@zte.com.cn> Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn> Signed-off-by: CGEL ZTE <cgel.zte@gmail.com> Link: https://lore.kernel.org/r/20220104104139.601031-1-chi.minghao@zte.com.cn Signed-off-by: Mark Brown <broonie@kernel.org>
2022-01-04PCI: mvebu: Fix support for DEVCAP2, DEVCTL2 and LNKCTL2 registers on emulated bridgePali Rohár1-0/+23
Armada XP and new hardware supports access to DEVCAP2, DEVCTL2 and LNKCTL2 configuration registers of PCIe core via PCIE_CAP_PCIEXP. So export them via emulated software root bridge. Pre-XP hardware does not support these registers and returns zeros. Link: https://lore.kernel.org/r/20211125124605.25915-16-pali@kernel.org Fixes: 1f08673eef12 ("PCI: mvebu: Convert to PCI emulated bridge config space") Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2022-01-04PCI: mvebu: Fix support for PCI_EXP_RTSTA on emulated bridgePali Rohár1-1/+10
PME Status bit in Root Status Register (PCIE_RC_RTSTA_OFF) is read-only and can be cleared only by writing 0b to the Interrupt Cause RW0C register (PCIE_INT_CAUSE_OFF). Link: https://lore.kernel.org/r/20211125124605.25915-15-pali@kernel.org Fixes: 1f08673eef12 ("PCI: mvebu: Convert to PCI emulated bridge config space") Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2022-01-04spi: ar934x: fix transfer sizeOskari Lemmela1-5/+11
If bits_per_word is configured, transfer only word amount of data per iteration. Signed-off-by: Oskari Lemmela <oskari@lemmela.net> Link: https://lore.kernel.org/r/20211222055958.1383233-2-oskari@lemmela.net Signed-off-by: Mark Brown <broonie@kernel.org>
2022-01-04ASoC: fsl_mqs: fix MODULE_ALIASAlyssa Ross1-1/+1
modprobe can't handle spaces in aliases. Fixes: 9e28f6532c61 ("ASoC: fsl_mqs: Add MQS component driver") Signed-off-by: Alyssa Ross <hi@alyssa.is> Link: https://lore.kernel.org/r/20220104132218.1690103-1-hi@alyssa.is Signed-off-by: Mark Brown <broonie@kernel.org>
2022-01-04PCI: mvebu: Fix support for PCI_EXP_DEVCTL on emulated bridgePali Rohár1-10/+1
Comment in Armada 370 functional specification is misleading. PCI_EXP_DEVCTL_*RE bits are supported and configures receiving of error interrupts. Link: https://lore.kernel.org/r/20211125124605.25915-14-pali@kernel.org Fixes: 1f08673eef12 ("PCI: mvebu: Convert to PCI emulated bridge config space") Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2022-01-04PCI: mvebu: Fix support for PCI_BRIDGE_CTL_BUS_RESET on emulated bridgePali Rohár1-0/+28
Hardware supports PCIe Hot Reset via PCIE_CTRL_OFF register. Use it for implementing PCI_BRIDGE_CTL_BUS_RESET bit of PCI_BRIDGE_CONTROL register on emulated bridge. With this change the function pci_reset_secondary_bus() starts working and can reset connected PCIe card. Link: https://lore.kernel.org/r/20211125124605.25915-13-pali@kernel.org Fixes: 1f08673eef12 ("PCI: mvebu: Convert to PCI emulated bridge config space") Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2022-01-04PCI: mvebu: Fix configuring secondary bus of PCIe Root Port via emulated bridgePali Rohár1-2/+97
It looks like that mvebu PCIe controller has for each PCIe link fully independent PCIe host bridge and so every PCIe Root Port is isolated not only on its own bus but also isolated from each others. But in past device tree structure was defined to put all PCIe Root Ports (as PCI Bridge devices) into one root bus 0 and this bus is emulated by pci-mvebu.c driver. Probably reason for this decision was incorrect understanding of PCIe topology of these Armada SoCs and also reason of misunderstanding how is PCIe controller generating Type 0 and Type 1 config requests (it is fully different compared to other drivers). Probably incorrect setup leaded to very surprised things like having PCIe Root Port (PCI Bridge device, with even incorrect Device Class set to Memory Controller) and the PCIe device behind the Root Port on the same PCI bus, which obviously was needed to somehow hack (as these two devices cannot be in reality on the same bus). Properly set mvebu local bus number and mvebu local device number based on PCI Bridge secondary bus number configuration. Also correctly report configured secondary bus number in config space. And explain in driver comment why this setup is correct. Link: https://lore.kernel.org/r/20211125124605.25915-12-pali@kernel.org Fixes: 1f08673eef12 ("PCI: mvebu: Convert to PCI emulated bridge config space") Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2022-01-04PCI: mvebu: Set PCI Bridge Class Code to PCI BridgePali Rohár1-1/+27
The default value of Class Code of this bridge corresponds to a Memory controller, though. This is probably relict from the past when old Marvell/Galileo PCI-based controllers were used as standalone PCI device for connecting SDRAM or workaround for PCs with broken BIOS. Details are in commit 36de23a4c5f0 ("MIPS: Cobalt: Explain GT64111 early PCI fixup"). Change the Class Code to correspond to a PCI Bridge. Add comment explaining this change. Link: https://lore.kernel.org/r/20211125124605.25915-11-pali@kernel.org Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2022-01-04PCI: mvebu: Setup PCIe controller to Root Complex modePali Rohár1-1/+7
This driver operates only in Root Complex mode, so ensure that hardware is properly configured in Root Complex mode. Link: https://lore.kernel.org/r/20211125124605.25915-10-pali@kernel.org Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2022-01-04PCI: mvebu: Propagate errors when updating PCI_IO_BASE and PCI_MEM_BASE registersPali Rohár1-27/+55
Properly propagate failure from mvebu_pcie_add_windows() function back to the caller mvebu_pci_bridge_emul_base_conf_write() and correctly updates PCI_IO_BASE, PCI_MEM_BASE and PCI_IO_BASE_UPPER16 registers on error. On error set base value higher than limit value which indicates that address range is disabled. When IO is unsupported then let IO registers zeroed as required by PCIe base specification. Link: https://lore.kernel.org/r/20211125124605.25915-9-pali@kernel.org Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2022-01-04PCI: mvebu: Do not modify PCI IO type bits in conf_writePali Rohár1-7/+0
PCI IO type bits are already initialized in mvebu_pci_bridge_emul_init() function and only when IO support is enabled. These type bits are read-only and pci-bridge-emul.c code already does not allow to modify them from upper layers. When IO support is disabled then all IO registers should be read-only and return zeros. Therefore do not modify PCI IO type bits in mvebu_pci_bridge_emul_base_conf_write() callback. Link: https://lore.kernel.org/r/20211125124605.25915-8-pali@kernel.org Fixes: 1f08673eef12 ("PCI: mvebu: Convert to PCI emulated bridge config space") Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2022-01-04PCI: mvebu: Fix support for bus mastering and PCI_COMMAND on emulated bridgePali Rohár1-20/+32
According to PCI specifications bits [0:2] of Command Register, this should be by default disabled on reset. So explicitly disable these bits at early beginning of driver initialization. Also remove code which unconditionally enables all 3 bits and let kernel code (via pci_set_master() function) to handle bus mastering of PCI Bridge via emulated PCI_COMMAND on emulated bridge. Adjust existing functions mvebu_pcie_handle_iobase_change() and mvebu_pcie_handle_membase_change() to handle PCI_IO_BASE and PCI_MEM_BASE registers correctly even when bus mastering on emulated bridge is disabled. Link: https://lore.kernel.org/r/20211125124605.25915-7-pali@kernel.org Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2022-01-04PCI: mvebu: Disallow mapping interrupts on emulated bridgesPali Rohár1-0/+10
Interrupt support on mvebu emulated bridges is not implemented yet. So properly indicate return value to callers that they cannot request interrupts from emulated bridge. Link: https://lore.kernel.org/r/20211125124605.25915-6-pali@kernel.org Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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