November 2024 - Linux-stable-mirror

FAILED: patch "[PATCH] mm/gup: avoid an unnecessary allocation call for" failed to apply to 6.11-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.11-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.11.y git checkout FETCH_HEAD git cherry-pick -x 94efde1d15399f5c88e576923db9bcd422d217f2 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024111754-stamina-flyer-1e05@gregkh' --subject-prefix 'PATCH 6.11.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 94efde1d15399f5c88e576923db9bcd422d217f2 Mon Sep 17 00:00:00 2001 From: John Hubbard <jhubbard(a)nvidia.com> Date: Mon, 4 Nov 2024 19:29:44 -0800 Subject: [PATCH] mm/gup: avoid an unnecessary allocation call for FOLL_LONGTERM cases commit 53ba78de064b ("mm/gup: introduce check_and_migrate_movable_folios()") created a new constraint on the pin_user_pages*() API family: a potentially large internal allocation must now occur, for FOLL_LONGTERM cases. A user-visible consequence has now appeared: user space can no longer pin more than 2GB of memory anymore on x86_64. That's because, on a 4KB PAGE_SIZE system, when user space tries to (indirectly, via a device driver that calls pin_user_pages()) pin 2GB, this requires an allocation of a folio pointers array of MAX_PAGE_ORDER size, which is the limit for kmalloc(). In addition to the directly visible effect described above, there is also the problem of adding an unnecessary allocation. The **pages array argument has already been allocated, and there is no need for a redundant **folios array allocation in this case. Fix this by avoiding the new allocation entirely. This is done by referring to either the original page[i] within **pages, or to the associated folio. Thanks to David Hildenbrand for suggesting this approach and for providing the initial implementation (which I've tested and adjusted slightly) as well. [jhubbard(a)nvidia.com: whitespace tweak, per David] Link: https://lkml.kernel.org/r/131cf9c8-ebc0-4cbb-b722-22fa8527bf3c@nvidia.com [jhubbard(a)nvidia.com: bypass pofs_get_folio(), per Oscar] Link: https://lkml.kernel.org/r/c1587c7f-9155-45be-bd62-1e36c0dd6923@nvidia.com Link: https://lkml.kernel.org/r/20241105032944.141488-2-jhubbard@nvidia.com Fixes: 53ba78de064b ("mm/gup: introduce check_and_migrate_movable_folios()") Signed-off-by: John Hubbard <jhubbard(a)nvidia.com> Suggested-by: David Hildenbrand <david(a)redhat.com> Acked-by: David Hildenbrand <david(a)redhat.com> Reviewed-by: Oscar Salvador <osalvador(a)suse.de> Cc: Vivek Kasireddy <vivek.kasireddy(a)intel.com> Cc: Dave Airlie <airlied(a)redhat.com> Cc: Gerd Hoffmann <kraxel(a)redhat.com> Cc: Matthew Wilcox <willy(a)infradead.org> Cc: Christoph Hellwig <hch(a)infradead.org> Cc: Jason Gunthorpe <jgg(a)nvidia.com> Cc: Peter Xu <peterx(a)redhat.com> Cc: Arnd Bergmann <arnd(a)arndb.de> Cc: Daniel Vetter <daniel.vetter(a)ffwll.ch> Cc: Dongwon Kim <dongwon.kim(a)intel.com> Cc: Hugh Dickins <hughd(a)google.com> Cc: Junxiao Chang <junxiao.chang(a)intel.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> diff --git a/mm/gup.c b/mm/gup.c index 4637dab7b54f..ad0c8922dac3 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -2273,20 +2273,57 @@ struct page *get_dump_page(unsigned long addr) #endif /* CONFIG_ELF_CORE */ #ifdef CONFIG_MIGRATION + +/* + * An array of either pages or folios ("pofs"). Although it may seem tempting to + * avoid this complication, by simply interpreting a list of folios as a list of + * pages, that approach won't work in the longer term, because eventually the + * layouts of struct page and struct folio will become completely different. + * Furthermore, this pof approach avoids excessive page_folio() calls. + */ +struct pages_or_folios { + union { + struct page **pages; + struct folio **folios; + void **entries; + }; + bool has_folios; + long nr_entries; +}; + +static struct folio *pofs_get_folio(struct pages_or_folios *pofs, long i) +{ + if (pofs->has_folios) + return pofs->folios[i]; + return page_folio(pofs->pages[i]); +} + +static void pofs_clear_entry(struct pages_or_folios *pofs, long i) +{ + pofs->entries[i] = NULL; +} + +static void pofs_unpin(struct pages_or_folios *pofs) +{ + if (pofs->has_folios) + unpin_folios(pofs->folios, pofs->nr_entries); + else + unpin_user_pages(pofs->pages, pofs->nr_entries); +} + /* * Returns the number of collected folios. Return value is always >= 0. */ static unsigned long collect_longterm_unpinnable_folios( - struct list_head *movable_folio_list, - unsigned long nr_folios, - struct folio **folios) + struct list_head *movable_folio_list, + struct pages_or_folios *pofs) { unsigned long i, collected = 0; struct folio *prev_folio = NULL; bool drain_allow = true; - for (i = 0; i < nr_folios; i++) { - struct folio *folio = folios[i]; + for (i = 0; i < pofs->nr_entries; i++) { + struct folio *folio = pofs_get_folio(pofs, i); if (folio == prev_folio) continue; @@ -2327,16 +2364,15 @@ static unsigned long collect_longterm_unpinnable_folios( * Returns -EAGAIN if all folios were successfully migrated or -errno for * failure (or partial success). */ -static int migrate_longterm_unpinnable_folios( - struct list_head *movable_folio_list, - unsigned long nr_folios, - struct folio **folios) +static int +migrate_longterm_unpinnable_folios(struct list_head *movable_folio_list, + struct pages_or_folios *pofs) { int ret; unsigned long i; - for (i = 0; i < nr_folios; i++) { - struct folio *folio = folios[i]; + for (i = 0; i < pofs->nr_entries; i++) { + struct folio *folio = pofs_get_folio(pofs, i); if (folio_is_device_coherent(folio)) { /* @@ -2344,7 +2380,7 @@ static int migrate_longterm_unpinnable_folios( * convert the pin on the source folio to a normal * reference. */ - folios[i] = NULL; + pofs_clear_entry(pofs, i); folio_get(folio); gup_put_folio(folio, 1, FOLL_PIN); @@ -2363,8 +2399,8 @@ static int migrate_longterm_unpinnable_folios( * calling folio_isolate_lru() which takes a reference so the * folio won't be freed if it's migrating. */ - unpin_folio(folios[i]); - folios[i] = NULL; + unpin_folio(folio); + pofs_clear_entry(pofs, i); } if (!list_empty(movable_folio_list)) { @@ -2387,12 +2423,26 @@ static int migrate_longterm_unpinnable_folios( return -EAGAIN; err: - unpin_folios(folios, nr_folios); + pofs_unpin(pofs); putback_movable_pages(movable_folio_list); return ret; } +static long +check_and_migrate_movable_pages_or_folios(struct pages_or_folios *pofs) +{ + LIST_HEAD(movable_folio_list); + unsigned long collected; + + collected = collect_longterm_unpinnable_folios(&movable_folio_list, + pofs); + if (!collected) + return 0; + + return migrate_longterm_unpinnable_folios(&movable_folio_list, pofs); +} + /* * Check whether all folios are *allowed* to be pinned indefinitely (long term). * Rather confusingly, all folios in the range are required to be pinned via @@ -2417,16 +2467,13 @@ static int migrate_longterm_unpinnable_folios( static long check_and_migrate_movable_folios(unsigned long nr_folios, struct folio **folios) { - unsigned long collected; - LIST_HEAD(movable_folio_list); + struct pages_or_folios pofs = { + .folios = folios, + .has_folios = true, + .nr_entries = nr_folios, + }; - collected = collect_longterm_unpinnable_folios(&movable_folio_list, - nr_folios, folios); - if (!collected) - return 0; - - return migrate_longterm_unpinnable_folios(&movable_folio_list, - nr_folios, folios); + return check_and_migrate_movable_pages_or_folios(&pofs); } /* @@ -2436,22 +2483,13 @@ static long check_and_migrate_movable_folios(unsigned long nr_folios, static long check_and_migrate_movable_pages(unsigned long nr_pages, struct page **pages) { - struct folio **folios; - long i, ret; + struct pages_or_folios pofs = { + .pages = pages, + .has_folios = false, + .nr_entries = nr_pages, + }; - folios = kmalloc_array(nr_pages, sizeof(*folios), GFP_KERNEL); - if (!folios) { - unpin_user_pages(pages, nr_pages); - return -ENOMEM; - } - - for (i = 0; i < nr_pages; i++) - folios[i] = page_folio(pages[i]); - - ret = check_and_migrate_movable_folios(nr_pages, folios); - - kfree(folios); - return ret; + return check_and_migrate_movable_pages_or_folios(&pofs); } #else static long check_and_migrate_movable_pages(unsigned long nr_pages,

1 year, 1 month

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[PATCH] mm/gup: avoid an unnecessary allocation call for FOLL_LONGTERM cases

by John Hubbard

commit 53ba78de064b ("mm/gup: introduce check_and_migrate_movable_folios()") created a new constraint on the pin_user_pages*() API family: a potentially large internal allocation must now occur, for FOLL_LONGTERM cases. A user-visible consequence has now appeared: user space can no longer pin more than 2GB of memory anymore on x86_64. That's because, on a 4KB PAGE_SIZE system, when user space tries to (indirectly, via a device driver that calls pin_user_pages()) pin 2GB, this requires an allocation of a folio pointers array of MAX_PAGE_ORDER size, which is the limit for kmalloc(). In addition to the directly visible effect described above, there is also the problem of adding an unnecessary allocation. The **pages array argument has already been allocated, and there is no need for a redundant **folios array allocation in this case. Fix this by avoiding the new allocation entirely. This is done by referring to either the original page[i] within **pages, or to the associated folio. Thanks to David Hildenbrand for suggesting this approach and for providing the initial implementation (which I've tested and adjusted slightly) as well. [jhubbard(a)nvidia.com]: tweaked the patch to apply to linux-stable/6.11.y [jhubbard(a)nvidia.com: whitespace tweak, per David] Link: https://lkml.kernel.org/r/131cf9c8-ebc0-4cbb-b722-22fa8527bf3c@nvidia.com [jhubbard(a)nvidia.com: bypass pofs_get_folio(), per Oscar] Link: https://lkml.kernel.org/r/c1587c7f-9155-45be-bd62-1e36c0dd6923@nvidia.com Link: https://lkml.kernel.org/r/20241105032944.141488-2-jhubbard@nvidia.com Fixes: 53ba78de064b ("mm/gup: introduce check_and_migrate_movable_folios()") Signed-off-by: John Hubbard <jhubbard(a)nvidia.com> Suggested-by: David Hildenbrand <david(a)redhat.com> Acked-by: David Hildenbrand <david(a)redhat.com> Reviewed-by: Oscar Salvador <osalvador(a)suse.de> Cc: Vivek Kasireddy <vivek.kasireddy(a)intel.com> Cc: Dave Airlie <airlied(a)redhat.com> Cc: Gerd Hoffmann <kraxel(a)redhat.com> Cc: Matthew Wilcox <willy(a)infradead.org> Cc: Christoph Hellwig <hch(a)infradead.org> Cc: Jason Gunthorpe <jgg(a)nvidia.com> Cc: Peter Xu <peterx(a)redhat.com> Cc: Arnd Bergmann <arnd(a)arndb.de> Cc: Daniel Vetter <daniel.vetter(a)ffwll.ch> Cc: Dongwon Kim <dongwon.kim(a)intel.com> Cc: Hugh Dickins <hughd(a)google.com> Cc: Junxiao Chang <junxiao.chang(a)intel.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/gup.c | 114 +++++++++++++++++++++++++++++++++++++------------------ 1 file changed, 77 insertions(+), 37 deletions(-) diff --git a/mm/gup.c b/mm/gup.c index 947881ff5e8f..fd3d7900c24b 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -2282,20 +2282,57 @@ struct page *get_dump_page(unsigned long addr) #endif /* CONFIG_ELF_CORE */ #ifdef CONFIG_MIGRATION + +/* + * An array of either pages or folios ("pofs"). Although it may seem tempting to + * avoid this complication, by simply interpreting a list of folios as a list of + * pages, that approach won't work in the longer term, because eventually the + * layouts of struct page and struct folio will become completely different. + * Furthermore, this pof approach avoids excessive page_folio() calls. + */ +struct pages_or_folios { + union { + struct page **pages; + struct folio **folios; + void **entries; + }; + bool has_folios; + long nr_entries; +}; + +static struct folio *pofs_get_folio(struct pages_or_folios *pofs, long i) +{ + if (pofs->has_folios) + return pofs->folios[i]; + return page_folio(pofs->pages[i]); +} + +static void pofs_clear_entry(struct pages_or_folios *pofs, long i) +{ + pofs->entries[i] = NULL; +} + +static void pofs_unpin(struct pages_or_folios *pofs) +{ + if (pofs->has_folios) + unpin_folios(pofs->folios, pofs->nr_entries); + else + unpin_user_pages(pofs->pages, pofs->nr_entries); +} + /* * Returns the number of collected folios. Return value is always >= 0. */ static unsigned long collect_longterm_unpinnable_folios( - struct list_head *movable_folio_list, - unsigned long nr_folios, - struct folio **folios) + struct list_head *movable_folio_list, + struct pages_or_folios *pofs) { unsigned long i, collected = 0; struct folio *prev_folio = NULL; bool drain_allow = true; - for (i = 0; i < nr_folios; i++) { - struct folio *folio = folios[i]; + for (i = 0; i < pofs->nr_entries; i++) { + struct folio *folio = pofs_get_folio(pofs, i); if (folio == prev_folio) continue; @@ -2336,16 +2373,15 @@ static unsigned long collect_longterm_unpinnable_folios( * Returns -EAGAIN if all folios were successfully migrated or -errno for * failure (or partial success). */ -static int migrate_longterm_unpinnable_folios( - struct list_head *movable_folio_list, - unsigned long nr_folios, - struct folio **folios) +static int +migrate_longterm_unpinnable_folios(struct list_head *movable_folio_list, + struct pages_or_folios *pofs) { int ret; unsigned long i; - for (i = 0; i < nr_folios; i++) { - struct folio *folio = folios[i]; + for (i = 0; i < pofs->nr_entries; i++) { + struct folio *folio = pofs_get_folio(pofs, i); if (folio_is_device_coherent(folio)) { /* @@ -2353,7 +2389,7 @@ static int migrate_longterm_unpinnable_folios( * convert the pin on the source folio to a normal * reference. */ - folios[i] = NULL; + pofs_clear_entry(pofs, i); folio_get(folio); gup_put_folio(folio, 1, FOLL_PIN); @@ -2372,8 +2408,8 @@ static int migrate_longterm_unpinnable_folios( * calling folio_isolate_lru() which takes a reference so the * folio won't be freed if it's migrating. */ - unpin_folio(folios[i]); - folios[i] = NULL; + unpin_folio(folio); + pofs_clear_entry(pofs, i); } if (!list_empty(movable_folio_list)) { @@ -2396,12 +2432,26 @@ static int migrate_longterm_unpinnable_folios( return -EAGAIN; err: - unpin_folios(folios, nr_folios); + pofs_unpin(pofs); putback_movable_pages(movable_folio_list); return ret; } +static long +check_and_migrate_movable_pages_or_folios(struct pages_or_folios *pofs) +{ + LIST_HEAD(movable_folio_list); + unsigned long collected; + + collected = collect_longterm_unpinnable_folios(&movable_folio_list, + pofs); + if (!collected) + return 0; + + return migrate_longterm_unpinnable_folios(&movable_folio_list, pofs); +} + /* * Check whether all folios are *allowed* to be pinned indefinitely (longterm). * Rather confusingly, all folios in the range are required to be pinned via @@ -2421,16 +2471,13 @@ static int migrate_longterm_unpinnable_folios( static long check_and_migrate_movable_folios(unsigned long nr_folios, struct folio **folios) { - unsigned long collected; - LIST_HEAD(movable_folio_list); + struct pages_or_folios pofs = { + .folios = folios, + .has_folios = true, + .nr_entries = nr_folios, + }; - collected = collect_longterm_unpinnable_folios(&movable_folio_list, - nr_folios, folios); - if (!collected) - return 0; - - return migrate_longterm_unpinnable_folios(&movable_folio_list, - nr_folios, folios); + return check_and_migrate_movable_pages_or_folios(&pofs); } /* @@ -2442,20 +2489,13 @@ static long check_and_migrate_movable_folios(unsigned long nr_folios, static long check_and_migrate_movable_pages(unsigned long nr_pages, struct page **pages) { - struct folio **folios; - long i, ret; + struct pages_or_folios pofs = { + .pages = pages, + .has_folios = false, + .nr_entries = nr_pages, + }; - folios = kmalloc_array(nr_pages, sizeof(*folios), GFP_KERNEL); - if (!folios) - return -ENOMEM; - - for (i = 0; i < nr_pages; i++) - folios[i] = page_folio(pages[i]); - - ret = check_and_migrate_movable_folios(nr_pages, folios); - - kfree(folios); - return ret; + return check_and_migrate_movable_pages_or_folios(&pofs); } #else static long check_and_migrate_movable_pages(unsigned long nr_pages, -- 2.47.0

1 year, 1 month

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Additional panel replay fixes for 6.11

by Mario Limonciello

Hi, A few more panel replay fixes have been made for issues reported on 6.11.y commit 17e68f89132b ("drm/amd/display: Run idle optimizations at end of vblank handler") commit b8d9d5fef4915 ("drm/amd/display: Change some variable name of psr") commit bd8a957661743 ("drm/amd/display: Fix Panel Replay not update screen correctly") There were tested by Tested-By: James Courtier-Dutton <james.dutton(a)gmail.com> on 6.11.8 base. Can you please backport? Thanks,

1 year, 1 month

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mmc: core: add devm_mmc_alloc_host (5.10.y)

by Dan Carpenter

Hi Sasha, The 5.10.y kernel backported commit 80df83c2c57e ("mmc: core: add devm_mmc_alloc_host") but not the fix for it. 71d04535e853 ("mmc: core: fix return value check in devm_mmc_alloc_host()") The 6.6.y kernel was released with both commits so it's not affected and none of the other stable trees include the buggy commit so they're not affected either. Only 5.10.y needs to be fixed. regards, dan carpenter

1 year, 1 month

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FAILED: patch "[PATCH] drm/amdgpu: fix check in gmc_v9_0_get_vm_pte()" failed to apply to 6.6-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 0e5ac88fb918297a7484b67f2b484d43bed3fbbe # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024111738-jalapeno-unknown-3db3@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 0e5ac88fb918297a7484b67f2b484d43bed3fbbe Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig(a)amd.com> Date: Thu, 31 Oct 2024 10:04:17 +0100 Subject: [PATCH] drm/amdgpu: fix check in gmc_v9_0_get_vm_pte() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The coherency flags can only be determined when the BO is locked and that in turn is only guaranteed when the mapping is validated. Fix the check, move the resource check into the function and add an assert that the BO is locked. Signed-off-by: Christian König <christian.koenig(a)amd.com> Fixes: d1a372af1c3d ("drm/amdgpu: Set MTYPE in PTE based on BO flags") Acked-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> (cherry picked from commit 1b4ca8546f5b5c482717bedb8e031227b1541539) Cc: stable(a)vger.kernel.org diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c index c76ac0dfe572..7a45f3fdc734 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c @@ -1124,8 +1124,10 @@ static void gmc_v9_0_get_coherence_flags(struct amdgpu_device *adev, uint64_t *flags) { struct amdgpu_device *bo_adev = amdgpu_ttm_adev(bo->tbo.bdev); - bool is_vram = bo->tbo.resource->mem_type == TTM_PL_VRAM; - bool coherent = bo->flags & (AMDGPU_GEM_CREATE_COHERENT | AMDGPU_GEM_CREATE_EXT_COHERENT); + bool is_vram = bo->tbo.resource && + bo->tbo.resource->mem_type == TTM_PL_VRAM; + bool coherent = bo->flags & (AMDGPU_GEM_CREATE_COHERENT | + AMDGPU_GEM_CREATE_EXT_COHERENT); bool ext_coherent = bo->flags & AMDGPU_GEM_CREATE_EXT_COHERENT; bool uncached = bo->flags & AMDGPU_GEM_CREATE_UNCACHED; struct amdgpu_vm *vm = mapping->bo_va->base.vm; @@ -1133,6 +1135,8 @@ static void gmc_v9_0_get_coherence_flags(struct amdgpu_device *adev, bool snoop = false; bool is_local; + dma_resv_assert_held(bo->tbo.base.resv); + switch (amdgpu_ip_version(adev, GC_HWIP, 0)) { case IP_VERSION(9, 4, 1): case IP_VERSION(9, 4, 2): @@ -1251,9 +1255,8 @@ static void gmc_v9_0_get_vm_pte(struct amdgpu_device *adev, *flags &= ~AMDGPU_PTE_VALID; } - if (bo && bo->tbo.resource) - gmc_v9_0_get_coherence_flags(adev, mapping->bo_va->base.bo, - mapping, flags); + if ((*flags & AMDGPU_PTE_VALID) && bo) + gmc_v9_0_get_coherence_flags(adev, bo, mapping, flags); } static void gmc_v9_0_override_vm_pte_flags(struct amdgpu_device *adev,

1 year, 1 month

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FAILED: patch "[PATCH] pmdomain: core: Add GENPD_FLAG_DEV_NAME_FW flag" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 899f44531fe6cac4b024710fec647ecc127724b8 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024111736-chihuahua-linguini-7bcb@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 899f44531fe6cac4b024710fec647ecc127724b8 Mon Sep 17 00:00:00 2001 From: Sibi Sankar <quic_sibis(a)quicinc.com> Date: Wed, 30 Oct 2024 18:25:10 +0530 Subject: [PATCH] pmdomain: core: Add GENPD_FLAG_DEV_NAME_FW flag Introduce GENPD_FLAG_DEV_NAME_FW flag which instructs genpd to generate an unique device name using ida. It is aimed to be used by genpd providers which derive their names directly from FW making them susceptible to debugfs node creation failures. Reported-by: Johan Hovold <johan+linaro(a)kernel.org> Closes: https://lore.kernel.org/lkml/ZoQjAWse2YxwyRJv@hovoldconsulting.com/ Fixes: 718072ceb211 ("PM: domains: create debugfs nodes when adding power domains") Suggested-by: Ulf Hansson <ulf.hansson(a)linaro.org> Suggested-by: Dmitry Baryshkov <dmitry.baryshkov(a)linaro.org> Signed-off-by: Sibi Sankar <quic_sibis(a)quicinc.com> Cc: stable(a)vger.kernel.org Message-ID: <20241030125512.2884761-5-quic_sibis(a)quicinc.com> Signed-off-by: Ulf Hansson <ulf.hansson(a)linaro.org> diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c index 5ede0f7eda09..29ad510e881c 100644 --- a/drivers/pmdomain/core.c +++ b/drivers/pmdomain/core.c @@ -7,6 +7,7 @@ #define pr_fmt(fmt) "PM: " fmt #include <linux/delay.h> +#include <linux/idr.h> #include <linux/kernel.h> #include <linux/io.h> #include <linux/platform_device.h> @@ -23,6 +24,9 @@ #include <linux/cpu.h> #include <linux/debugfs.h> +/* Provides a unique ID for each genpd device */ +static DEFINE_IDA(genpd_ida); + #define GENPD_RETRY_MAX_MS 250 /* Approximate */ #define GENPD_DEV_CALLBACK(genpd, type, callback, dev) \ @@ -171,6 +175,7 @@ static const struct genpd_lock_ops genpd_raw_spin_ops = { #define genpd_is_cpu_domain(genpd) (genpd->flags & GENPD_FLAG_CPU_DOMAIN) #define genpd_is_rpm_always_on(genpd) (genpd->flags & GENPD_FLAG_RPM_ALWAYS_ON) #define genpd_is_opp_table_fw(genpd) (genpd->flags & GENPD_FLAG_OPP_TABLE_FW) +#define genpd_is_dev_name_fw(genpd) (genpd->flags & GENPD_FLAG_DEV_NAME_FW) static inline bool irq_safe_dev_in_sleep_domain(struct device *dev, const struct generic_pm_domain *genpd) @@ -189,7 +194,7 @@ static inline bool irq_safe_dev_in_sleep_domain(struct device *dev, if (ret) dev_warn_once(dev, "PM domain %s will not be powered off\n", - genpd->name); + dev_name(&genpd->dev)); return ret; } @@ -274,7 +279,7 @@ static void genpd_debug_remove(struct generic_pm_domain *genpd) if (!genpd_debugfs_dir) return; - debugfs_lookup_and_remove(genpd->name, genpd_debugfs_dir); + debugfs_lookup_and_remove(dev_name(&genpd->dev), genpd_debugfs_dir); } static void genpd_update_accounting(struct generic_pm_domain *genpd) @@ -731,7 +736,7 @@ static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed) genpd->states[state_idx].power_on_latency_ns = elapsed_ns; genpd->gd->max_off_time_changed = true; pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n", - genpd->name, "on", elapsed_ns); + dev_name(&genpd->dev), "on", elapsed_ns); out: raw_notifier_call_chain(&genpd->power_notifiers, GENPD_NOTIFY_ON, NULL); @@ -782,7 +787,7 @@ static int _genpd_power_off(struct generic_pm_domain *genpd, bool timed) genpd->states[state_idx].power_off_latency_ns = elapsed_ns; genpd->gd->max_off_time_changed = true; pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n", - genpd->name, "off", elapsed_ns); + dev_name(&genpd->dev), "off", elapsed_ns); out: raw_notifier_call_chain(&genpd->power_notifiers, GENPD_NOTIFY_OFF, @@ -1940,7 +1945,7 @@ int dev_pm_genpd_add_notifier(struct device *dev, struct notifier_block *nb) if (ret) { dev_warn(dev, "failed to add notifier for PM domain %s\n", - genpd->name); + dev_name(&genpd->dev)); return ret; } @@ -1987,7 +1992,7 @@ int dev_pm_genpd_remove_notifier(struct device *dev) if (ret) { dev_warn(dev, "failed to remove notifier for PM domain %s\n", - genpd->name); + dev_name(&genpd->dev)); return ret; } @@ -2013,7 +2018,7 @@ static int genpd_add_subdomain(struct generic_pm_domain *genpd, */ if (!genpd_is_irq_safe(genpd) && genpd_is_irq_safe(subdomain)) { WARN(1, "Parent %s of subdomain %s must be IRQ safe\n", - genpd->name, subdomain->name); + dev_name(&genpd->dev), subdomain->name); return -EINVAL; } @@ -2088,7 +2093,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, if (!list_empty(&subdomain->parent_links) || subdomain->device_count) { pr_warn("%s: unable to remove subdomain %s\n", - genpd->name, subdomain->name); + dev_name(&genpd->dev), subdomain->name); ret = -EBUSY; goto out; } @@ -2225,6 +2230,7 @@ int pm_genpd_init(struct generic_pm_domain *genpd, genpd->status = is_off ? GENPD_STATE_OFF : GENPD_STATE_ON; genpd->device_count = 0; genpd->provider = NULL; + genpd->device_id = -ENXIO; genpd->has_provider = false; genpd->accounting_time = ktime_get_mono_fast_ns(); genpd->domain.ops.runtime_suspend = genpd_runtime_suspend; @@ -2265,7 +2271,18 @@ int pm_genpd_init(struct generic_pm_domain *genpd, return ret; device_initialize(&genpd->dev); - dev_set_name(&genpd->dev, "%s", genpd->name); + + if (!genpd_is_dev_name_fw(genpd)) { + dev_set_name(&genpd->dev, "%s", genpd->name); + } else { + ret = ida_alloc(&genpd_ida, GFP_KERNEL); + if (ret < 0) { + put_device(&genpd->dev); + return ret; + } + genpd->device_id = ret; + dev_set_name(&genpd->dev, "%s_%u", genpd->name, genpd->device_id); + } mutex_lock(&gpd_list_lock); list_add(&genpd->gpd_list_node, &gpd_list); @@ -2287,13 +2304,13 @@ static int genpd_remove(struct generic_pm_domain *genpd) if (genpd->has_provider) { genpd_unlock(genpd); - pr_err("Provider present, unable to remove %s\n", genpd->name); + pr_err("Provider present, unable to remove %s\n", dev_name(&genpd->dev)); return -EBUSY; } if (!list_empty(&genpd->parent_links) || genpd->device_count) { genpd_unlock(genpd); - pr_err("%s: unable to remove %s\n", __func__, genpd->name); + pr_err("%s: unable to remove %s\n", __func__, dev_name(&genpd->dev)); return -EBUSY; } @@ -2307,9 +2324,11 @@ static int genpd_remove(struct generic_pm_domain *genpd) genpd_unlock(genpd); genpd_debug_remove(genpd); cancel_work_sync(&genpd->power_off_work); + if (genpd->device_id != -ENXIO) + ida_free(&genpd_ida, genpd->device_id); genpd_free_data(genpd); - pr_debug("%s: removed %s\n", __func__, genpd->name); + pr_debug("%s: removed %s\n", __func__, dev_name(&genpd->dev)); return 0; } @@ -3272,12 +3291,12 @@ static int genpd_summary_one(struct seq_file *s, else snprintf(state, sizeof(state), "%s", status_lookup[genpd->status]); - seq_printf(s, "%-30s %-30s %u", genpd->name, state, genpd->performance_state); + seq_printf(s, "%-30s %-30s %u", dev_name(&genpd->dev), state, genpd->performance_state); /* * Modifications on the list require holding locks on both * parent and child, so we are safe. - * Also genpd->name is immutable. + * Also the device name is immutable. */ list_for_each_entry(link, &genpd->parent_links, parent_node) { if (list_is_first(&link->parent_node, &genpd->parent_links)) @@ -3502,7 +3521,7 @@ static void genpd_debug_add(struct generic_pm_domain *genpd) if (!genpd_debugfs_dir) return; - d = debugfs_create_dir(genpd->name, genpd_debugfs_dir); + d = debugfs_create_dir(dev_name(&genpd->dev), genpd_debugfs_dir); debugfs_create_file("current_state", 0444, d, genpd, &status_fops); diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index b637ec14025f..cf4b11be3709 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -92,6 +92,10 @@ struct dev_pm_domain_list { * GENPD_FLAG_OPP_TABLE_FW: The genpd provider supports performance states, * but its corresponding OPP tables are not * described in DT, but are given directly by FW. + * + * GENPD_FLAG_DEV_NAME_FW: Instructs genpd to generate an unique device name + * using ida. It is used by genpd providers which + * get their genpd-names directly from FW. */ #define GENPD_FLAG_PM_CLK (1U << 0) #define GENPD_FLAG_IRQ_SAFE (1U << 1) @@ -101,6 +105,7 @@ struct dev_pm_domain_list { #define GENPD_FLAG_RPM_ALWAYS_ON (1U << 5) #define GENPD_FLAG_MIN_RESIDENCY (1U << 6) #define GENPD_FLAG_OPP_TABLE_FW (1U << 7) +#define GENPD_FLAG_DEV_NAME_FW (1U << 8) enum gpd_status { GENPD_STATE_ON = 0, /* PM domain is on */ @@ -163,6 +168,7 @@ struct generic_pm_domain { atomic_t sd_count; /* Number of subdomains with power "on" */ enum gpd_status status; /* Current state of the domain */ unsigned int device_count; /* Number of devices */ + unsigned int device_id; /* unique device id */ unsigned int suspended_count; /* System suspend device counter */ unsigned int prepared_count; /* Suspend counter of prepared devices */ unsigned int performance_state; /* Aggregated max performance state */

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FAILED: patch "[PATCH] pmdomain: core: Add GENPD_FLAG_DEV_NAME_FW flag" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 899f44531fe6cac4b024710fec647ecc127724b8 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024111733-trio-unpinned-dc91@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 899f44531fe6cac4b024710fec647ecc127724b8 Mon Sep 17 00:00:00 2001 From: Sibi Sankar <quic_sibis(a)quicinc.com> Date: Wed, 30 Oct 2024 18:25:10 +0530 Subject: [PATCH] pmdomain: core: Add GENPD_FLAG_DEV_NAME_FW flag Introduce GENPD_FLAG_DEV_NAME_FW flag which instructs genpd to generate an unique device name using ida. It is aimed to be used by genpd providers which derive their names directly from FW making them susceptible to debugfs node creation failures. Reported-by: Johan Hovold <johan+linaro(a)kernel.org> Closes: https://lore.kernel.org/lkml/ZoQjAWse2YxwyRJv@hovoldconsulting.com/ Fixes: 718072ceb211 ("PM: domains: create debugfs nodes when adding power domains") Suggested-by: Ulf Hansson <ulf.hansson(a)linaro.org> Suggested-by: Dmitry Baryshkov <dmitry.baryshkov(a)linaro.org> Signed-off-by: Sibi Sankar <quic_sibis(a)quicinc.com> Cc: stable(a)vger.kernel.org Message-ID: <20241030125512.2884761-5-quic_sibis(a)quicinc.com> Signed-off-by: Ulf Hansson <ulf.hansson(a)linaro.org> diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c index 5ede0f7eda09..29ad510e881c 100644 --- a/drivers/pmdomain/core.c +++ b/drivers/pmdomain/core.c @@ -7,6 +7,7 @@ #define pr_fmt(fmt) "PM: " fmt #include <linux/delay.h> +#include <linux/idr.h> #include <linux/kernel.h> #include <linux/io.h> #include <linux/platform_device.h> @@ -23,6 +24,9 @@ #include <linux/cpu.h> #include <linux/debugfs.h> +/* Provides a unique ID for each genpd device */ +static DEFINE_IDA(genpd_ida); + #define GENPD_RETRY_MAX_MS 250 /* Approximate */ #define GENPD_DEV_CALLBACK(genpd, type, callback, dev) \ @@ -171,6 +175,7 @@ static const struct genpd_lock_ops genpd_raw_spin_ops = { #define genpd_is_cpu_domain(genpd) (genpd->flags & GENPD_FLAG_CPU_DOMAIN) #define genpd_is_rpm_always_on(genpd) (genpd->flags & GENPD_FLAG_RPM_ALWAYS_ON) #define genpd_is_opp_table_fw(genpd) (genpd->flags & GENPD_FLAG_OPP_TABLE_FW) +#define genpd_is_dev_name_fw(genpd) (genpd->flags & GENPD_FLAG_DEV_NAME_FW) static inline bool irq_safe_dev_in_sleep_domain(struct device *dev, const struct generic_pm_domain *genpd) @@ -189,7 +194,7 @@ static inline bool irq_safe_dev_in_sleep_domain(struct device *dev, if (ret) dev_warn_once(dev, "PM domain %s will not be powered off\n", - genpd->name); + dev_name(&genpd->dev)); return ret; } @@ -274,7 +279,7 @@ static void genpd_debug_remove(struct generic_pm_domain *genpd) if (!genpd_debugfs_dir) return; - debugfs_lookup_and_remove(genpd->name, genpd_debugfs_dir); + debugfs_lookup_and_remove(dev_name(&genpd->dev), genpd_debugfs_dir); } static void genpd_update_accounting(struct generic_pm_domain *genpd) @@ -731,7 +736,7 @@ static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed) genpd->states[state_idx].power_on_latency_ns = elapsed_ns; genpd->gd->max_off_time_changed = true; pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n", - genpd->name, "on", elapsed_ns); + dev_name(&genpd->dev), "on", elapsed_ns); out: raw_notifier_call_chain(&genpd->power_notifiers, GENPD_NOTIFY_ON, NULL); @@ -782,7 +787,7 @@ static int _genpd_power_off(struct generic_pm_domain *genpd, bool timed) genpd->states[state_idx].power_off_latency_ns = elapsed_ns; genpd->gd->max_off_time_changed = true; pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n", - genpd->name, "off", elapsed_ns); + dev_name(&genpd->dev), "off", elapsed_ns); out: raw_notifier_call_chain(&genpd->power_notifiers, GENPD_NOTIFY_OFF, @@ -1940,7 +1945,7 @@ int dev_pm_genpd_add_notifier(struct device *dev, struct notifier_block *nb) if (ret) { dev_warn(dev, "failed to add notifier for PM domain %s\n", - genpd->name); + dev_name(&genpd->dev)); return ret; } @@ -1987,7 +1992,7 @@ int dev_pm_genpd_remove_notifier(struct device *dev) if (ret) { dev_warn(dev, "failed to remove notifier for PM domain %s\n", - genpd->name); + dev_name(&genpd->dev)); return ret; } @@ -2013,7 +2018,7 @@ static int genpd_add_subdomain(struct generic_pm_domain *genpd, */ if (!genpd_is_irq_safe(genpd) && genpd_is_irq_safe(subdomain)) { WARN(1, "Parent %s of subdomain %s must be IRQ safe\n", - genpd->name, subdomain->name); + dev_name(&genpd->dev), subdomain->name); return -EINVAL; } @@ -2088,7 +2093,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, if (!list_empty(&subdomain->parent_links) || subdomain->device_count) { pr_warn("%s: unable to remove subdomain %s\n", - genpd->name, subdomain->name); + dev_name(&genpd->dev), subdomain->name); ret = -EBUSY; goto out; } @@ -2225,6 +2230,7 @@ int pm_genpd_init(struct generic_pm_domain *genpd, genpd->status = is_off ? GENPD_STATE_OFF : GENPD_STATE_ON; genpd->device_count = 0; genpd->provider = NULL; + genpd->device_id = -ENXIO; genpd->has_provider = false; genpd->accounting_time = ktime_get_mono_fast_ns(); genpd->domain.ops.runtime_suspend = genpd_runtime_suspend; @@ -2265,7 +2271,18 @@ int pm_genpd_init(struct generic_pm_domain *genpd, return ret; device_initialize(&genpd->dev); - dev_set_name(&genpd->dev, "%s", genpd->name); + + if (!genpd_is_dev_name_fw(genpd)) { + dev_set_name(&genpd->dev, "%s", genpd->name); + } else { + ret = ida_alloc(&genpd_ida, GFP_KERNEL); + if (ret < 0) { + put_device(&genpd->dev); + return ret; + } + genpd->device_id = ret; + dev_set_name(&genpd->dev, "%s_%u", genpd->name, genpd->device_id); + } mutex_lock(&gpd_list_lock); list_add(&genpd->gpd_list_node, &gpd_list); @@ -2287,13 +2304,13 @@ static int genpd_remove(struct generic_pm_domain *genpd) if (genpd->has_provider) { genpd_unlock(genpd); - pr_err("Provider present, unable to remove %s\n", genpd->name); + pr_err("Provider present, unable to remove %s\n", dev_name(&genpd->dev)); return -EBUSY; } if (!list_empty(&genpd->parent_links) || genpd->device_count) { genpd_unlock(genpd); - pr_err("%s: unable to remove %s\n", __func__, genpd->name); + pr_err("%s: unable to remove %s\n", __func__, dev_name(&genpd->dev)); return -EBUSY; } @@ -2307,9 +2324,11 @@ static int genpd_remove(struct generic_pm_domain *genpd) genpd_unlock(genpd); genpd_debug_remove(genpd); cancel_work_sync(&genpd->power_off_work); + if (genpd->device_id != -ENXIO) + ida_free(&genpd_ida, genpd->device_id); genpd_free_data(genpd); - pr_debug("%s: removed %s\n", __func__, genpd->name); + pr_debug("%s: removed %s\n", __func__, dev_name(&genpd->dev)); return 0; } @@ -3272,12 +3291,12 @@ static int genpd_summary_one(struct seq_file *s, else snprintf(state, sizeof(state), "%s", status_lookup[genpd->status]); - seq_printf(s, "%-30s %-30s %u", genpd->name, state, genpd->performance_state); + seq_printf(s, "%-30s %-30s %u", dev_name(&genpd->dev), state, genpd->performance_state); /* * Modifications on the list require holding locks on both * parent and child, so we are safe. - * Also genpd->name is immutable. + * Also the device name is immutable. */ list_for_each_entry(link, &genpd->parent_links, parent_node) { if (list_is_first(&link->parent_node, &genpd->parent_links)) @@ -3502,7 +3521,7 @@ static void genpd_debug_add(struct generic_pm_domain *genpd) if (!genpd_debugfs_dir) return; - d = debugfs_create_dir(genpd->name, genpd_debugfs_dir); + d = debugfs_create_dir(dev_name(&genpd->dev), genpd_debugfs_dir); debugfs_create_file("current_state", 0444, d, genpd, &status_fops); diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index b637ec14025f..cf4b11be3709 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -92,6 +92,10 @@ struct dev_pm_domain_list { * GENPD_FLAG_OPP_TABLE_FW: The genpd provider supports performance states, * but its corresponding OPP tables are not * described in DT, but are given directly by FW. + * + * GENPD_FLAG_DEV_NAME_FW: Instructs genpd to generate an unique device name + * using ida. It is used by genpd providers which + * get their genpd-names directly from FW. */ #define GENPD_FLAG_PM_CLK (1U << 0) #define GENPD_FLAG_IRQ_SAFE (1U << 1) @@ -101,6 +105,7 @@ struct dev_pm_domain_list { #define GENPD_FLAG_RPM_ALWAYS_ON (1U << 5) #define GENPD_FLAG_MIN_RESIDENCY (1U << 6) #define GENPD_FLAG_OPP_TABLE_FW (1U << 7) +#define GENPD_FLAG_DEV_NAME_FW (1U << 8) enum gpd_status { GENPD_STATE_ON = 0, /* PM domain is on */ @@ -163,6 +168,7 @@ struct generic_pm_domain { atomic_t sd_count; /* Number of subdomains with power "on" */ enum gpd_status status; /* Current state of the domain */ unsigned int device_count; /* Number of devices */ + unsigned int device_id; /* unique device id */ unsigned int suspended_count; /* System suspend device counter */ unsigned int prepared_count; /* Suspend counter of prepared devices */ unsigned int performance_state; /* Aggregated max performance state */

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FAILED: patch "[PATCH] pmdomain: core: Add GENPD_FLAG_DEV_NAME_FW flag" failed to apply to 6.6-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 899f44531fe6cac4b024710fec647ecc127724b8 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024111731-overheat-eraser-3483@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 899f44531fe6cac4b024710fec647ecc127724b8 Mon Sep 17 00:00:00 2001 From: Sibi Sankar <quic_sibis(a)quicinc.com> Date: Wed, 30 Oct 2024 18:25:10 +0530 Subject: [PATCH] pmdomain: core: Add GENPD_FLAG_DEV_NAME_FW flag Introduce GENPD_FLAG_DEV_NAME_FW flag which instructs genpd to generate an unique device name using ida. It is aimed to be used by genpd providers which derive their names directly from FW making them susceptible to debugfs node creation failures. Reported-by: Johan Hovold <johan+linaro(a)kernel.org> Closes: https://lore.kernel.org/lkml/ZoQjAWse2YxwyRJv@hovoldconsulting.com/ Fixes: 718072ceb211 ("PM: domains: create debugfs nodes when adding power domains") Suggested-by: Ulf Hansson <ulf.hansson(a)linaro.org> Suggested-by: Dmitry Baryshkov <dmitry.baryshkov(a)linaro.org> Signed-off-by: Sibi Sankar <quic_sibis(a)quicinc.com> Cc: stable(a)vger.kernel.org Message-ID: <20241030125512.2884761-5-quic_sibis(a)quicinc.com> Signed-off-by: Ulf Hansson <ulf.hansson(a)linaro.org> diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c index 5ede0f7eda09..29ad510e881c 100644 --- a/drivers/pmdomain/core.c +++ b/drivers/pmdomain/core.c @@ -7,6 +7,7 @@ #define pr_fmt(fmt) "PM: " fmt #include <linux/delay.h> +#include <linux/idr.h> #include <linux/kernel.h> #include <linux/io.h> #include <linux/platform_device.h> @@ -23,6 +24,9 @@ #include <linux/cpu.h> #include <linux/debugfs.h> +/* Provides a unique ID for each genpd device */ +static DEFINE_IDA(genpd_ida); + #define GENPD_RETRY_MAX_MS 250 /* Approximate */ #define GENPD_DEV_CALLBACK(genpd, type, callback, dev) \ @@ -171,6 +175,7 @@ static const struct genpd_lock_ops genpd_raw_spin_ops = { #define genpd_is_cpu_domain(genpd) (genpd->flags & GENPD_FLAG_CPU_DOMAIN) #define genpd_is_rpm_always_on(genpd) (genpd->flags & GENPD_FLAG_RPM_ALWAYS_ON) #define genpd_is_opp_table_fw(genpd) (genpd->flags & GENPD_FLAG_OPP_TABLE_FW) +#define genpd_is_dev_name_fw(genpd) (genpd->flags & GENPD_FLAG_DEV_NAME_FW) static inline bool irq_safe_dev_in_sleep_domain(struct device *dev, const struct generic_pm_domain *genpd) @@ -189,7 +194,7 @@ static inline bool irq_safe_dev_in_sleep_domain(struct device *dev, if (ret) dev_warn_once(dev, "PM domain %s will not be powered off\n", - genpd->name); + dev_name(&genpd->dev)); return ret; } @@ -274,7 +279,7 @@ static void genpd_debug_remove(struct generic_pm_domain *genpd) if (!genpd_debugfs_dir) return; - debugfs_lookup_and_remove(genpd->name, genpd_debugfs_dir); + debugfs_lookup_and_remove(dev_name(&genpd->dev), genpd_debugfs_dir); } static void genpd_update_accounting(struct generic_pm_domain *genpd) @@ -731,7 +736,7 @@ static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed) genpd->states[state_idx].power_on_latency_ns = elapsed_ns; genpd->gd->max_off_time_changed = true; pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n", - genpd->name, "on", elapsed_ns); + dev_name(&genpd->dev), "on", elapsed_ns); out: raw_notifier_call_chain(&genpd->power_notifiers, GENPD_NOTIFY_ON, NULL); @@ -782,7 +787,7 @@ static int _genpd_power_off(struct generic_pm_domain *genpd, bool timed) genpd->states[state_idx].power_off_latency_ns = elapsed_ns; genpd->gd->max_off_time_changed = true; pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n", - genpd->name, "off", elapsed_ns); + dev_name(&genpd->dev), "off", elapsed_ns); out: raw_notifier_call_chain(&genpd->power_notifiers, GENPD_NOTIFY_OFF, @@ -1940,7 +1945,7 @@ int dev_pm_genpd_add_notifier(struct device *dev, struct notifier_block *nb) if (ret) { dev_warn(dev, "failed to add notifier for PM domain %s\n", - genpd->name); + dev_name(&genpd->dev)); return ret; } @@ -1987,7 +1992,7 @@ int dev_pm_genpd_remove_notifier(struct device *dev) if (ret) { dev_warn(dev, "failed to remove notifier for PM domain %s\n", - genpd->name); + dev_name(&genpd->dev)); return ret; } @@ -2013,7 +2018,7 @@ static int genpd_add_subdomain(struct generic_pm_domain *genpd, */ if (!genpd_is_irq_safe(genpd) && genpd_is_irq_safe(subdomain)) { WARN(1, "Parent %s of subdomain %s must be IRQ safe\n", - genpd->name, subdomain->name); + dev_name(&genpd->dev), subdomain->name); return -EINVAL; } @@ -2088,7 +2093,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, if (!list_empty(&subdomain->parent_links) || subdomain->device_count) { pr_warn("%s: unable to remove subdomain %s\n", - genpd->name, subdomain->name); + dev_name(&genpd->dev), subdomain->name); ret = -EBUSY; goto out; } @@ -2225,6 +2230,7 @@ int pm_genpd_init(struct generic_pm_domain *genpd, genpd->status = is_off ? GENPD_STATE_OFF : GENPD_STATE_ON; genpd->device_count = 0; genpd->provider = NULL; + genpd->device_id = -ENXIO; genpd->has_provider = false; genpd->accounting_time = ktime_get_mono_fast_ns(); genpd->domain.ops.runtime_suspend = genpd_runtime_suspend; @@ -2265,7 +2271,18 @@ int pm_genpd_init(struct generic_pm_domain *genpd, return ret; device_initialize(&genpd->dev); - dev_set_name(&genpd->dev, "%s", genpd->name); + + if (!genpd_is_dev_name_fw(genpd)) { + dev_set_name(&genpd->dev, "%s", genpd->name); + } else { + ret = ida_alloc(&genpd_ida, GFP_KERNEL); + if (ret < 0) { + put_device(&genpd->dev); + return ret; + } + genpd->device_id = ret; + dev_set_name(&genpd->dev, "%s_%u", genpd->name, genpd->device_id); + } mutex_lock(&gpd_list_lock); list_add(&genpd->gpd_list_node, &gpd_list); @@ -2287,13 +2304,13 @@ static int genpd_remove(struct generic_pm_domain *genpd) if (genpd->has_provider) { genpd_unlock(genpd); - pr_err("Provider present, unable to remove %s\n", genpd->name); + pr_err("Provider present, unable to remove %s\n", dev_name(&genpd->dev)); return -EBUSY; } if (!list_empty(&genpd->parent_links) || genpd->device_count) { genpd_unlock(genpd); - pr_err("%s: unable to remove %s\n", __func__, genpd->name); + pr_err("%s: unable to remove %s\n", __func__, dev_name(&genpd->dev)); return -EBUSY; } @@ -2307,9 +2324,11 @@ static int genpd_remove(struct generic_pm_domain *genpd) genpd_unlock(genpd); genpd_debug_remove(genpd); cancel_work_sync(&genpd->power_off_work); + if (genpd->device_id != -ENXIO) + ida_free(&genpd_ida, genpd->device_id); genpd_free_data(genpd); - pr_debug("%s: removed %s\n", __func__, genpd->name); + pr_debug("%s: removed %s\n", __func__, dev_name(&genpd->dev)); return 0; } @@ -3272,12 +3291,12 @@ static int genpd_summary_one(struct seq_file *s, else snprintf(state, sizeof(state), "%s", status_lookup[genpd->status]); - seq_printf(s, "%-30s %-30s %u", genpd->name, state, genpd->performance_state); + seq_printf(s, "%-30s %-30s %u", dev_name(&genpd->dev), state, genpd->performance_state); /* * Modifications on the list require holding locks on both * parent and child, so we are safe. - * Also genpd->name is immutable. + * Also the device name is immutable. */ list_for_each_entry(link, &genpd->parent_links, parent_node) { if (list_is_first(&link->parent_node, &genpd->parent_links)) @@ -3502,7 +3521,7 @@ static void genpd_debug_add(struct generic_pm_domain *genpd) if (!genpd_debugfs_dir) return; - d = debugfs_create_dir(genpd->name, genpd_debugfs_dir); + d = debugfs_create_dir(dev_name(&genpd->dev), genpd_debugfs_dir); debugfs_create_file("current_state", 0444, d, genpd, &status_fops); diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index b637ec14025f..cf4b11be3709 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -92,6 +92,10 @@ struct dev_pm_domain_list { * GENPD_FLAG_OPP_TABLE_FW: The genpd provider supports performance states, * but its corresponding OPP tables are not * described in DT, but are given directly by FW. + * + * GENPD_FLAG_DEV_NAME_FW: Instructs genpd to generate an unique device name + * using ida. It is used by genpd providers which + * get their genpd-names directly from FW. */ #define GENPD_FLAG_PM_CLK (1U << 0) #define GENPD_FLAG_IRQ_SAFE (1U << 1) @@ -101,6 +105,7 @@ struct dev_pm_domain_list { #define GENPD_FLAG_RPM_ALWAYS_ON (1U << 5) #define GENPD_FLAG_MIN_RESIDENCY (1U << 6) #define GENPD_FLAG_OPP_TABLE_FW (1U << 7) +#define GENPD_FLAG_DEV_NAME_FW (1U << 8) enum gpd_status { GENPD_STATE_ON = 0, /* PM domain is on */ @@ -163,6 +168,7 @@ struct generic_pm_domain { atomic_t sd_count; /* Number of subdomains with power "on" */ enum gpd_status status; /* Current state of the domain */ unsigned int device_count; /* Number of devices */ + unsigned int device_id; /* unique device id */ unsigned int suspended_count; /* System suspend device counter */ unsigned int prepared_count; /* Suspend counter of prepared devices */ unsigned int performance_state; /* Aggregated max performance state */

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FAILED: patch "[PATCH] pmdomain: imx93-blk-ctrl: correct remove path" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x f7c7c5aa556378a2c8da72c1f7f238b6648f95fb # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024111700-overhang-copied-323b@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From f7c7c5aa556378a2c8da72c1f7f238b6648f95fb Mon Sep 17 00:00:00 2001 From: Peng Fan <peng.fan(a)nxp.com> Date: Fri, 1 Nov 2024 18:12:51 +0800 Subject: [PATCH] pmdomain: imx93-blk-ctrl: correct remove path The check condition should be 'i < bc->onecell_data.num_domains', not 'bc->onecell_data.num_domains' which will make the look never finish and cause kernel panic. Also disable runtime to address "imx93-blk-ctrl 4ac10000.system-controller: Unbalanced pm_runtime_enable!" Fixes: e9aa77d413c9 ("soc: imx: add i.MX93 media blk ctrl driver") Signed-off-by: Peng Fan <peng.fan(a)nxp.com> Reviewed-by: Stefan Wahren <wahrenst(a)gmx.net> Cc: stable(a)vger.kernel.org Message-ID: <20241101101252.1448466-1-peng.fan(a)oss.nxp.com> Signed-off-by: Ulf Hansson <ulf.hansson(a)linaro.org> diff --git a/drivers/pmdomain/imx/imx93-blk-ctrl.c b/drivers/pmdomain/imx/imx93-blk-ctrl.c index 904ffa55b8f4..b10348ac10f0 100644 --- a/drivers/pmdomain/imx/imx93-blk-ctrl.c +++ b/drivers/pmdomain/imx/imx93-blk-ctrl.c @@ -313,7 +313,9 @@ static void imx93_blk_ctrl_remove(struct platform_device *pdev) of_genpd_del_provider(pdev->dev.of_node); - for (i = 0; bc->onecell_data.num_domains; i++) { + pm_runtime_disable(&pdev->dev); + + for (i = 0; i < bc->onecell_data.num_domains; i++) { struct imx93_blk_ctrl_domain *domain = &bc->domains[i]; pm_genpd_remove(&domain->genpd);

1 year, 1 month

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FAILED: patch "[PATCH] mmc: sunxi-mmc: Fix A100 compatible description" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 85b580afc2c215394e08974bf033de9face94955 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024111734-aneurism-aroma-9f52@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 85b580afc2c215394e08974bf033de9face94955 Mon Sep 17 00:00:00 2001 From: Andre Przywara <andre.przywara(a)arm.com> Date: Thu, 7 Nov 2024 01:42:40 +0000 Subject: [PATCH] mmc: sunxi-mmc: Fix A100 compatible description It turns out that the Allwinner A100/A133 SoC only supports 8K DMA blocks (13 bits wide), for both the SD/SDIO and eMMC instances. And while this alone would make a trivial fix, the H616 falls back to the A100 compatible string, so we have to now match the H616 compatible string explicitly against the description advertising 64K DMA blocks. As the A100 is now compatible with the D1 description, let the A100 compatible string point to that block instead, and introduce an explicit match against the H616 string, pointing to the old description. Also remove the redundant setting of clk_delays to NULL on the way. Fixes: 3536b82e5853 ("mmc: sunxi: add support for A100 mmc controller") Cc: stable(a)vger.kernel.org Signed-off-by: Andre Przywara <andre.przywara(a)arm.com> Tested-by: Parthiban Nallathambi <parthiban(a)linumiz.com> Reviewed-by: Chen-Yu Tsai <wens(a)csie.org> Message-ID: <20241107014240.24669-1-andre.przywara(a)arm.com> Signed-off-by: Ulf Hansson <ulf.hansson(a)linaro.org> diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c index d3bd0ac99ec4..e0ab5fd635e6 100644 --- a/drivers/mmc/host/sunxi-mmc.c +++ b/drivers/mmc/host/sunxi-mmc.c @@ -1191,10 +1191,9 @@ static const struct sunxi_mmc_cfg sun50i_a64_emmc_cfg = { .needs_new_timings = true, }; -static const struct sunxi_mmc_cfg sun50i_a100_cfg = { +static const struct sunxi_mmc_cfg sun50i_h616_cfg = { .idma_des_size_bits = 16, .idma_des_shift = 2, - .clk_delays = NULL, .can_calibrate = true, .mask_data0 = true, .needs_new_timings = true, @@ -1217,8 +1216,9 @@ static const struct of_device_id sunxi_mmc_of_match[] = { { .compatible = "allwinner,sun20i-d1-mmc", .data = &sun20i_d1_cfg }, { .compatible = "allwinner,sun50i-a64-mmc", .data = &sun50i_a64_cfg }, { .compatible = "allwinner,sun50i-a64-emmc", .data = &sun50i_a64_emmc_cfg }, - { .compatible = "allwinner,sun50i-a100-mmc", .data = &sun50i_a100_cfg }, + { .compatible = "allwinner,sun50i-a100-mmc", .data = &sun20i_d1_cfg }, { .compatible = "allwinner,sun50i-a100-emmc", .data = &sun50i_a100_emmc_cfg }, + { .compatible = "allwinner,sun50i-h616-mmc", .data = &sun50i_h616_cfg }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, sunxi_mmc_of_match);

1 year, 1 month

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