From: Robin Murphy <robin.murphy@arm.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Joerg Roedel <joro@8bytes.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Tom Lendacky <thomas.lendacky@amd.com>,
iommu@lists.linux-foundation.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 13/26] iommu/dma: Remove __iommu_dma_free
Date: Mon, 29 Apr 2019 14:18:02 +0100 [thread overview]
Message-ID: <9c53d0e6-3692-e151-c64b-0070a89ca725@arm.com> (raw)
In-Reply-To: <20190422175942.18788-14-hch@lst.de>
On 22/04/2019 18:59, Christoph Hellwig wrote:
> We only have a single caller of this function left, so open code it there.
Heh, I even caught myself out for a moment thinking this looked
redundant with #18 now, but no :)
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> drivers/iommu/dma-iommu.c | 21 ++-------------------
> 1 file changed, 2 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
> index b8e46e89a60a..4632b9d301a1 100644
> --- a/drivers/iommu/dma-iommu.c
> +++ b/drivers/iommu/dma-iommu.c
> @@ -534,24 +534,6 @@ static struct page **__iommu_dma_get_pages(void *cpu_addr)
> return area->pages;
> }
>
> -/**
> - * iommu_dma_free - Free a buffer allocated by iommu_dma_alloc_remap()
> - * @dev: Device which owns this buffer
> - * @pages: Array of buffer pages as returned by __iommu_dma_alloc_remap()
> - * @size: Size of buffer in bytes
> - * @handle: DMA address of buffer
> - *
> - * Frees both the pages associated with the buffer, and the array
> - * describing them
> - */
> -static void __iommu_dma_free(struct device *dev, struct page **pages,
> - size_t size, dma_addr_t *handle)
> -{
> - __iommu_dma_unmap(dev, *handle, size);
> - __iommu_dma_free_pages(pages, PAGE_ALIGN(size) >> PAGE_SHIFT);
> - *handle = DMA_MAPPING_ERROR;
> -}
> -
> /**
> * iommu_dma_alloc_remap - Allocate and map a buffer contiguous in IOVA space
> * @dev: Device to allocate memory for. Must be a real device
> @@ -1034,7 +1016,8 @@ static void iommu_dma_free(struct device *dev, size_t size, void *cpu_addr,
>
> if (WARN_ON(!pages))
> return;
> - __iommu_dma_free(dev, pages, iosize, &handle);
> + __iommu_dma_unmap(dev, handle, iosize);
> + __iommu_dma_free_pages(pages, size >> PAGE_SHIFT);
> dma_common_free_remap(cpu_addr, size, VM_USERMAP);
> } else {
> __iommu_dma_unmap(dev, handle, iosize);
>
next prev parent reply other threads:[~2019-04-29 13:18 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-22 17:59 implement generic dma_map_ops for IOMMUs v3 Christoph Hellwig
2019-04-22 17:59 ` [PATCH 01/26] arm64/iommu: handle non-remapped addresses in ->mmap and ->get_sgtable Christoph Hellwig
2019-04-22 17:59 ` [PATCH 02/26] arm64/iommu: improve mmap bounds checking Christoph Hellwig
2019-04-29 12:35 ` Robin Murphy
2019-04-29 19:01 ` Christoph Hellwig
2019-04-30 11:38 ` Robin Murphy
2019-04-22 17:59 ` [PATCH 03/26] dma-mapping: add a Kconfig symbol to indicated arch_dma_prep_coherent presence Christoph Hellwig
2019-04-22 17:59 ` [PATCH 04/26] iommu/dma: Cleanup dma-iommu.h Christoph Hellwig
2019-04-22 17:59 ` [PATCH 05/26] iommu/dma: Remove the flush_page callback Christoph Hellwig
2019-04-22 17:59 ` [PATCH 06/26] iommu/dma: Use for_each_sg in iommu_dma_alloc Christoph Hellwig
2019-04-22 17:59 ` [PATCH 07/26] iommu/dma: move the arm64 wrappers to common code Christoph Hellwig
2019-04-29 12:56 ` Robin Murphy
2019-06-03 19:47 ` Jon Hunter
2019-06-04 6:05 ` Christoph Hellwig
2019-06-04 11:35 ` Jon Hunter
2019-04-22 17:59 ` [PATCH 08/26] iommu/dma: Move __iommu_dma_map Christoph Hellwig
2019-04-22 17:59 ` [PATCH 09/26] iommu/dma: Move domain lookup into __iommu_dma_{map,unmap} Christoph Hellwig
2019-04-22 17:59 ` [PATCH 10/26] iommu/dma: Squash __iommu_dma_{map,unmap}_page helpers Christoph Hellwig
2019-04-22 17:59 ` [PATCH 11/26] iommu/dma: Factor out remapped pages lookup Christoph Hellwig
2019-04-29 13:05 ` Robin Murphy
2019-04-29 19:10 ` Christoph Hellwig
2019-04-22 17:59 ` [PATCH 12/26] iommu/dma: Refactor the page array remapping allocator Christoph Hellwig
2019-04-29 13:10 ` Robin Murphy
2019-04-22 17:59 ` [PATCH 13/26] iommu/dma: Remove __iommu_dma_free Christoph Hellwig
2019-04-29 13:18 ` Robin Murphy [this message]
2019-04-22 17:59 ` [PATCH 14/26] iommu/dma: Refactor iommu_dma_free Christoph Hellwig
2019-04-29 13:59 ` Robin Murphy
2019-04-29 19:03 ` Christoph Hellwig
2019-04-29 19:16 ` Christoph Hellwig
2019-04-22 17:59 ` [PATCH 15/26] iommu/dma: Refactor iommu_dma_alloc Christoph Hellwig
2019-04-22 17:59 ` [PATCH 16/26] iommu/dma: Don't remap CMA unnecessarily Christoph Hellwig
2019-04-22 17:59 ` [PATCH 17/26] iommu/dma: Merge the CMA and alloc_pages allocation paths Christoph Hellwig
2019-04-22 17:59 ` [PATCH 18/26] iommu/dma: Split iommu_dma_free Christoph Hellwig
2019-04-22 17:59 ` [PATCH 19/26] iommu/dma: Cleanup variable naming in iommu_dma_alloc Christoph Hellwig
2019-04-29 14:11 ` Robin Murphy
2019-04-22 17:59 ` [PATCH 20/26] iommu/dma: Refactor iommu_dma_alloc, part 2 Christoph Hellwig
2019-04-29 14:45 ` Robin Murphy
2019-04-22 17:59 ` [PATCH 21/26] iommu/dma: Refactor iommu_dma_get_sgtable Christoph Hellwig
2019-04-29 14:08 ` Robin Murphy
2019-04-22 17:59 ` [PATCH 22/26] iommu/dma: Refactor iommu_dma_mmap Christoph Hellwig
2019-04-29 14:04 ` Robin Murphy
2019-04-22 17:59 ` [PATCH 23/26] iommu/dma: Don't depend on CONFIG_DMA_DIRECT_REMAP Christoph Hellwig
2019-04-29 14:46 ` Robin Murphy
2019-04-22 17:59 ` [PATCH 24/26] iommu/dma: Switch copyright boilerplace to SPDX Christoph Hellwig
2019-04-22 17:59 ` [PATCH 25/26] arm64: switch copyright boilerplace to SPDX in dma-mapping.c Christoph Hellwig
2019-04-22 17:59 ` [PATCH 26/26] arm64: trim includes " Christoph Hellwig
2019-04-29 15:00 ` Robin Murphy
2019-04-29 15:03 ` implement generic dma_map_ops for IOMMUs v3 Robin Murphy
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