From: Robin Murphy <robin.murphy@arm.com>
To: Jason Gunthorpe <jgg@nvidia.com>,
Alim Akhtar <alim.akhtar@samsung.com>,
Alyssa Rosenzweig <alyssa@rosenzweig.io>,
Albert Ou <aou@eecs.berkeley.edu>,
asahi@lists.linux.dev, Lu Baolu <baolu.lu@linux.intel.com>,
David Woodhouse <dwmw2@infradead.org>,
Heiko Stuebner <heiko@sntech.de>,
iommu@lists.linux.dev, Jernej Skrabec <jernej.skrabec@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Joerg Roedel <joro@8bytes.org>,
Krzysztof Kozlowski <krzk@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-riscv@lists.infradead.org,
linux-rockchip@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, linux-sunxi@lists.linux.dev,
linux-tegra@vger.kernel.org,
Marek Szyprowski <m.szyprowski@samsung.com>,
Hector Martin <marcan@marcan.st>,
Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Samuel Holland <samuel@sholland.org>,
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
Sven Peter <sven@svenpeter.dev>,
Thierry Reding <thierry.reding@gmail.com>,
Tomasz Jeznach <tjeznach@rivosinc.com>,
Krishna Reddy <vdumpa@nvidia.com>, Chen-Yu Tsai <wens@csie.org>,
Will Deacon <will@kernel.org>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>,
Joerg Roedel <jroedel@suse.de>,
Pasha Tatashin <pasha.tatashin@soleen.com>,
patches@lists.linux.dev, David Rientjes <rientjes@google.com>,
Matthew Wilcox <willy@infradead.org>
Subject: Re: [PATCH 05/19] iommu/pages: Replace iommu_free_pages() with iommu_free_page()
Date: Wed, 5 Feb 2025 15:55:58 +0000 [thread overview]
Message-ID: <ff16c183-0679-423c-939d-9906da174051@arm.com> (raw)
In-Reply-To: <5-v1-416f64558c7c+2a5-iommu_pages_jgg@nvidia.com>
On 2025-02-04 6:34 pm, Jason Gunthorpe wrote:
> Now that we have a folio under the allocation iommu_free_page() can know
> the order of the original allocation and do the correct thing to free it.
>
> Callers no longer need to pass in the allocation order to the free
> function. Just use iommu_free_page() everywhere.
Nit: we end up left with the _alloc_pages/_free_page combo which to me
looks slightly odd and uncomfortable - any chance we could go the other
way and align on _free_pages for consistency?
Thanks,
Robin.
> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
> ---
> drivers/iommu/amd/init.c | 28 +++++++++++-----------------
> drivers/iommu/amd/ppr.c | 2 +-
> drivers/iommu/exynos-iommu.c | 8 ++++----
> drivers/iommu/intel/irq_remapping.c | 4 ++--
> drivers/iommu/intel/pasid.c | 3 +--
> drivers/iommu/intel/pasid.h | 1 -
> drivers/iommu/intel/prq.c | 4 ++--
> drivers/iommu/io-pgtable-arm.c | 4 ++--
> drivers/iommu/io-pgtable-dart.c | 10 ++++------
> drivers/iommu/iommu-pages.h | 14 ++------------
> drivers/iommu/riscv/iommu.c | 6 ++----
> drivers/iommu/sun50i-iommu.c | 2 +-
> 12 files changed, 32 insertions(+), 54 deletions(-)
>
> diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
> index c5cd92edada061..f1c5041647173c 100644
> --- a/drivers/iommu/amd/init.c
> +++ b/drivers/iommu/amd/init.c
> @@ -653,8 +653,7 @@ static inline int __init alloc_dev_table(struct amd_iommu_pci_seg *pci_seg)
>
> static inline void free_dev_table(struct amd_iommu_pci_seg *pci_seg)
> {
> - iommu_free_pages(pci_seg->dev_table,
> - get_order(pci_seg->dev_table_size));
> + iommu_free_page(pci_seg->dev_table);
> pci_seg->dev_table = NULL;
> }
>
> @@ -671,8 +670,7 @@ static inline int __init alloc_rlookup_table(struct amd_iommu_pci_seg *pci_seg)
>
> static inline void free_rlookup_table(struct amd_iommu_pci_seg *pci_seg)
> {
> - iommu_free_pages(pci_seg->rlookup_table,
> - get_order(pci_seg->rlookup_table_size));
> + iommu_free_page(pci_seg->rlookup_table);
> pci_seg->rlookup_table = NULL;
> }
>
> @@ -691,8 +689,7 @@ static inline int __init alloc_irq_lookup_table(struct amd_iommu_pci_seg *pci_se
> static inline void free_irq_lookup_table(struct amd_iommu_pci_seg *pci_seg)
> {
> kmemleak_free(pci_seg->irq_lookup_table);
> - iommu_free_pages(pci_seg->irq_lookup_table,
> - get_order(pci_seg->rlookup_table_size));
> + iommu_free_page(pci_seg->irq_lookup_table);
> pci_seg->irq_lookup_table = NULL;
> }
>
> @@ -716,8 +713,7 @@ static int __init alloc_alias_table(struct amd_iommu_pci_seg *pci_seg)
>
> static void __init free_alias_table(struct amd_iommu_pci_seg *pci_seg)
> {
> - iommu_free_pages(pci_seg->alias_table,
> - get_order(pci_seg->alias_table_size));
> + iommu_free_page(pci_seg->alias_table);
> pci_seg->alias_table = NULL;
> }
>
> @@ -826,7 +822,7 @@ static void iommu_disable_command_buffer(struct amd_iommu *iommu)
>
> static void __init free_command_buffer(struct amd_iommu *iommu)
> {
> - iommu_free_pages(iommu->cmd_buf, get_order(CMD_BUFFER_SIZE));
> + iommu_free_page(iommu->cmd_buf);
> }
>
> void *__init iommu_alloc_4k_pages(struct amd_iommu *iommu, gfp_t gfp,
> @@ -838,7 +834,7 @@ void *__init iommu_alloc_4k_pages(struct amd_iommu *iommu, gfp_t gfp,
> if (buf &&
> check_feature(FEATURE_SNP) &&
> set_memory_4k((unsigned long)buf, (1 << order))) {
> - iommu_free_pages(buf, order);
> + iommu_free_page(buf);
> buf = NULL;
> }
>
> @@ -882,14 +878,14 @@ static void iommu_disable_event_buffer(struct amd_iommu *iommu)
>
> static void __init free_event_buffer(struct amd_iommu *iommu)
> {
> - iommu_free_pages(iommu->evt_buf, get_order(EVT_BUFFER_SIZE));
> + iommu_free_page(iommu->evt_buf);
> }
>
> static void free_ga_log(struct amd_iommu *iommu)
> {
> #ifdef CONFIG_IRQ_REMAP
> - iommu_free_pages(iommu->ga_log, get_order(GA_LOG_SIZE));
> - iommu_free_pages(iommu->ga_log_tail, get_order(8));
> + iommu_free_page(iommu->ga_log);
> + iommu_free_page(iommu->ga_log_tail);
> #endif
> }
>
> @@ -2781,8 +2777,7 @@ static void early_enable_iommus(void)
>
> for_each_pci_segment(pci_seg) {
> if (pci_seg->old_dev_tbl_cpy != NULL) {
> - iommu_free_pages(pci_seg->old_dev_tbl_cpy,
> - get_order(pci_seg->dev_table_size));
> + iommu_free_page(pci_seg->old_dev_tbl_cpy);
> pci_seg->old_dev_tbl_cpy = NULL;
> }
> }
> @@ -2795,8 +2790,7 @@ static void early_enable_iommus(void)
> pr_info("Copied DEV table from previous kernel.\n");
>
> for_each_pci_segment(pci_seg) {
> - iommu_free_pages(pci_seg->dev_table,
> - get_order(pci_seg->dev_table_size));
> + iommu_free_page(pci_seg->dev_table);
> pci_seg->dev_table = pci_seg->old_dev_tbl_cpy;
> }
>
> diff --git a/drivers/iommu/amd/ppr.c b/drivers/iommu/amd/ppr.c
> index 7c67d69f0b8cad..0a7c32ab841707 100644
> --- a/drivers/iommu/amd/ppr.c
> +++ b/drivers/iommu/amd/ppr.c
> @@ -48,7 +48,7 @@ void amd_iommu_enable_ppr_log(struct amd_iommu *iommu)
>
> void __init amd_iommu_free_ppr_log(struct amd_iommu *iommu)
> {
> - iommu_free_pages(iommu->ppr_log, get_order(PPR_LOG_SIZE));
> + iommu_free_page(iommu->ppr_log);
> }
>
> /*
> diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
> index c666ecab955d21..3c64fcdde6d294 100644
> --- a/drivers/iommu/exynos-iommu.c
> +++ b/drivers/iommu/exynos-iommu.c
> @@ -932,9 +932,9 @@ static struct iommu_domain *exynos_iommu_domain_alloc_paging(struct device *dev)
> return &domain->domain;
>
> err_lv2ent:
> - iommu_free_pages(domain->lv2entcnt, 1);
> + iommu_free_page(domain->lv2entcnt);
> err_counter:
> - iommu_free_pages(domain->pgtable, 2);
> + iommu_free_page(domain->pgtable);
> err_pgtable:
> kfree(domain);
> return NULL;
> @@ -975,8 +975,8 @@ static void exynos_iommu_domain_free(struct iommu_domain *iommu_domain)
> phys_to_virt(base));
> }
>
> - iommu_free_pages(domain->pgtable, 2);
> - iommu_free_pages(domain->lv2entcnt, 1);
> + iommu_free_page(domain->pgtable);
> + iommu_free_page(domain->lv2entcnt);
> kfree(domain);
> }
>
> diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
> index ad795c772f21b5..31a170501d2410 100644
> --- a/drivers/iommu/intel/irq_remapping.c
> +++ b/drivers/iommu/intel/irq_remapping.c
> @@ -620,7 +620,7 @@ static int intel_setup_irq_remapping(struct intel_iommu *iommu)
> out_free_bitmap:
> bitmap_free(bitmap);
> out_free_pages:
> - iommu_free_pages(ir_table_base, INTR_REMAP_PAGE_ORDER);
> + iommu_free_page(ir_table_base);
> out_free_table:
> kfree(ir_table);
>
> @@ -641,7 +641,7 @@ static void intel_teardown_irq_remapping(struct intel_iommu *iommu)
> irq_domain_free_fwnode(fn);
> iommu->ir_domain = NULL;
> }
> - iommu_free_pages(iommu->ir_table->base, INTR_REMAP_PAGE_ORDER);
> + iommu_free_page(iommu->ir_table->base);
> bitmap_free(iommu->ir_table->bitmap);
> kfree(iommu->ir_table);
> iommu->ir_table = NULL;
> diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c
> index fb59a7d35958f5..88070bb7f9b093 100644
> --- a/drivers/iommu/intel/pasid.c
> +++ b/drivers/iommu/intel/pasid.c
> @@ -67,7 +67,6 @@ int intel_pasid_alloc_table(struct device *dev)
> }
>
> pasid_table->table = dir;
> - pasid_table->order = order;
> pasid_table->max_pasid = 1 << (order + PAGE_SHIFT + 3);
> info->pasid_table = pasid_table;
>
> @@ -100,7 +99,7 @@ void intel_pasid_free_table(struct device *dev)
> iommu_free_page(table);
> }
>
> - iommu_free_pages(pasid_table->table, pasid_table->order);
> + iommu_free_page(pasid_table->table);
> kfree(pasid_table);
> }
>
> diff --git a/drivers/iommu/intel/pasid.h b/drivers/iommu/intel/pasid.h
> index 668d8ece6b143c..fd0fd1a0df84cc 100644
> --- a/drivers/iommu/intel/pasid.h
> +++ b/drivers/iommu/intel/pasid.h
> @@ -47,7 +47,6 @@ struct pasid_entry {
> /* The representative of a PASID table */
> struct pasid_table {
> void *table; /* pasid table pointer */
> - int order; /* page order of pasid table */
> u32 max_pasid; /* max pasid */
> };
>
> diff --git a/drivers/iommu/intel/prq.c b/drivers/iommu/intel/prq.c
> index c2d792db52c3e2..8620327b64394b 100644
> --- a/drivers/iommu/intel/prq.c
> +++ b/drivers/iommu/intel/prq.c
> @@ -338,7 +338,7 @@ int intel_iommu_enable_prq(struct intel_iommu *iommu)
> dmar_free_hwirq(irq);
> iommu->pr_irq = 0;
> free_prq:
> - iommu_free_pages(iommu->prq, PRQ_ORDER);
> + iommu_free_page(iommu->prq);
> iommu->prq = NULL;
>
> return ret;
> @@ -361,7 +361,7 @@ int intel_iommu_finish_prq(struct intel_iommu *iommu)
> iommu->iopf_queue = NULL;
> }
>
> - iommu_free_pages(iommu->prq, PRQ_ORDER);
> + iommu_free_page(iommu->prq);
> iommu->prq = NULL;
>
> return 0;
> diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c
> index 7632c80edea63a..b4c3729076376b 100644
> --- a/drivers/iommu/io-pgtable-arm.c
> +++ b/drivers/iommu/io-pgtable-arm.c
> @@ -300,7 +300,7 @@ static void *__arm_lpae_alloc_pages(size_t size, gfp_t gfp,
> if (cfg->free)
> cfg->free(cookie, pages, size);
> else
> - iommu_free_pages(pages, order);
> + iommu_free_page(pages);
>
> return NULL;
> }
> @@ -316,7 +316,7 @@ static void __arm_lpae_free_pages(void *pages, size_t size,
> if (cfg->free)
> cfg->free(cookie, pages, size);
> else
> - iommu_free_pages(pages, get_order(size));
> + iommu_free_page(pages);
> }
>
> static void __arm_lpae_sync_pte(arm_lpae_iopte *ptep, int num_entries,
> diff --git a/drivers/iommu/io-pgtable-dart.c b/drivers/iommu/io-pgtable-dart.c
> index c004640640ee50..f7b939d4b7d0b9 100644
> --- a/drivers/iommu/io-pgtable-dart.c
> +++ b/drivers/iommu/io-pgtable-dart.c
> @@ -262,7 +262,7 @@ static int dart_map_pages(struct io_pgtable_ops *ops, unsigned long iova,
>
> pte = dart_install_table(cptep, ptep, 0, data);
> if (pte)
> - iommu_free_pages(cptep, get_order(tblsz));
> + iommu_free_page(cptep);
>
> /* L2 table is present (now) */
> pte = READ_ONCE(*ptep);
> @@ -423,8 +423,7 @@ apple_dart_alloc_pgtable(struct io_pgtable_cfg *cfg, void *cookie)
>
> out_free_data:
> while (--i >= 0) {
> - iommu_free_pages(data->pgd[i],
> - get_order(DART_GRANULE(data)));
> + iommu_free_page(data->pgd[i]);
> }
> kfree(data);
> return NULL;
> @@ -433,7 +432,6 @@ apple_dart_alloc_pgtable(struct io_pgtable_cfg *cfg, void *cookie)
> static void apple_dart_free_pgtable(struct io_pgtable *iop)
> {
> struct dart_io_pgtable *data = io_pgtable_to_data(iop);
> - int order = get_order(DART_GRANULE(data));
> dart_iopte *ptep, *end;
> int i;
>
> @@ -445,9 +443,9 @@ static void apple_dart_free_pgtable(struct io_pgtable *iop)
> dart_iopte pte = *ptep++;
>
> if (pte)
> - iommu_free_pages(iopte_deref(pte, data), order);
> + iommu_free_page(iopte_deref(pte, data));
> }
> - iommu_free_pages(data->pgd[i], order);
> + iommu_free_page(data->pgd[i]);
> }
>
> kfree(data);
> diff --git a/drivers/iommu/iommu-pages.h b/drivers/iommu/iommu-pages.h
> index 26b91940bdc146..b15e0f85b3f739 100644
> --- a/drivers/iommu/iommu-pages.h
> +++ b/drivers/iommu/iommu-pages.h
> @@ -105,11 +105,10 @@ static inline void *iommu_alloc_page(gfp_t gfp)
> }
>
> /**
> - * iommu_free_pages - free page of a given order
> + * iommu_free_page - free page of any order
> * @virt: virtual address of the page to be freed.
> - * @order: page order
> */
> -static inline void iommu_free_pages(void *virt, int order)
> +static inline void iommu_free_page(void *virt)
> {
> struct page *page;
>
> @@ -121,15 +120,6 @@ static inline void iommu_free_pages(void *virt, int order)
> put_page(page);
> }
>
> -/**
> - * iommu_free_page - free page
> - * @virt: virtual address of the page to be freed.
> - */
> -static inline void iommu_free_page(void *virt)
> -{
> - iommu_free_pages(virt, 0);
> -}
> -
> /**
> * iommu_put_pages_list - free a list of pages.
> * @page: the head of the lru list to be freed.
> diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c
> index 8f049d4a0e2cb8..6e7df7273426da 100644
> --- a/drivers/iommu/riscv/iommu.c
> +++ b/drivers/iommu/riscv/iommu.c
> @@ -48,14 +48,13 @@ static DEFINE_IDA(riscv_iommu_pscids);
> /* Device resource-managed allocations */
> struct riscv_iommu_devres {
> void *addr;
> - int order;
> };
>
> static void riscv_iommu_devres_pages_release(struct device *dev, void *res)
> {
> struct riscv_iommu_devres *devres = res;
>
> - iommu_free_pages(devres->addr, devres->order);
> + iommu_free_page(devres->addr);
> }
>
> static int riscv_iommu_devres_pages_match(struct device *dev, void *res, void *p)
> @@ -80,12 +79,11 @@ static void *riscv_iommu_get_pages(struct riscv_iommu_device *iommu, int order)
> sizeof(struct riscv_iommu_devres), GFP_KERNEL);
>
> if (unlikely(!devres)) {
> - iommu_free_pages(addr, order);
> + iommu_free_page(addr);
> return NULL;
> }
>
> devres->addr = addr;
> - devres->order = order;
>
> devres_add(iommu->dev, devres);
>
> diff --git a/drivers/iommu/sun50i-iommu.c b/drivers/iommu/sun50i-iommu.c
> index 8d8f11854676c0..3d77aed8507373 100644
> --- a/drivers/iommu/sun50i-iommu.c
> +++ b/drivers/iommu/sun50i-iommu.c
> @@ -713,7 +713,7 @@ static void sun50i_iommu_domain_free(struct iommu_domain *domain)
> {
> struct sun50i_iommu_domain *sun50i_domain = to_sun50i_domain(domain);
>
> - iommu_free_pages(sun50i_domain->dt, get_order(DT_SIZE));
> + iommu_free_page(sun50i_domain->dt);
> sun50i_domain->dt = NULL;
>
> kfree(sun50i_domain);
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next prev parent reply other threads:[~2025-02-05 15:57 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-04 18:34 [PATCH 00/19] iommu: Further abstract iommu-pages Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 01/19] iommu/terga: Do not use struct page as the handle for as->pd memory Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 02/19] iommu/tegra: Do not use struct page as the handle for pts Jason Gunthorpe
2025-02-05 19:28 ` Robin Murphy
2025-02-06 17:48 ` Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 03/19] iommu/pages: Remove __iommu_alloc_pages()/__iommu_free_pages() Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 04/19] iommu/pages: Make iommu_put_pages_list() work with high order allocations Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 05/19] iommu/pages: Replace iommu_free_pages() with iommu_free_page() Jason Gunthorpe
2025-02-05 15:55 ` Robin Murphy [this message]
2025-02-05 17:41 ` Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 06/19] iommu/pages: De-inline the substantial functions Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 07/19] iommu/vtd: Use virt_to_phys() Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 08/19] iommu/pages: Formalize the freelist API Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 09/19] iommu/riscv: Convert to use struct iommu_pages_list Jason Gunthorpe
2025-02-06 5:53 ` Tomasz Jeznach
2025-02-04 18:34 ` [PATCH 10/19] iommu/amd: " Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 11/19] iommu: Change iommu_iotlb_gather to use iommu_page_list Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 12/19] iommu/pages: Remove iommu_put_pages_list_old and the _Generic Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 13/19] iommu/pages: Move from struct page to struct ioptdesc and folio Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 14/19] iommu/pages: Move the __GFP_HIGHMEM checks into the common code Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 15/19] iommu/pages: Allow sub page sizes to be passed into the allocator Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 16/19] iommu/amd: Use roundup_pow_two() instead of get_order() Jason Gunthorpe
2025-02-05 16:11 ` Robin Murphy
2025-02-05 17:59 ` Jason Gunthorpe
2025-02-04 18:34 ` [PATCH 17/19] iommu/riscv: Update to use iommu_alloc_pages_node_lg2() Jason Gunthorpe
2025-02-06 5:30 ` Tomasz Jeznach
2025-02-06 13:17 ` Jason Gunthorpe
2025-02-06 17:54 ` Tomasz Jeznach
2025-02-04 18:34 ` [PATCH 18/19] iommu: Update various drivers to pass in lg2sz instead of order to iommu pages Jason Gunthorpe
2025-02-05 15:47 ` Robin Murphy
2025-02-05 16:10 ` Jason Gunthorpe
2025-02-05 18:03 ` Robin Murphy
2025-02-05 18:39 ` Jason Gunthorpe
2025-02-04 18:35 ` [PATCH 19/19] iommu/pages: Remove iommu_alloc_page/pages() Jason Gunthorpe
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