From: Christoph Hellwig <hch@lst.de> To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tom Lendacky <thomas.lendacky@amd.com>, Thomas Bogendoerfer <tsbogend@alpha.franken.de>, Michael Ellerman <mpe@ellerman.id.au>, Boris Ostrovsky <boris.ostrovsky@oracle.com>, Juergen Gross <jgross@suse.com>, Stefano Stabellini <sstabellini@kernel.org>, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, xen-devel@lists.xenproject.org, iommu@lists.linux-foundation.org Subject: [PATCH 1/7] swiotlb: pass bytes instead of nslabs to swiotlb_init_with_tbl Date: Thu, 22 Apr 2021 09:19:15 +0200 [thread overview] Message-ID: <20210422071921.1428607-2-hch@lst.de> (raw) In-Reply-To: <20210422071921.1428607-1-hch@lst.de> Pass the actual allocation size to swiotlb_init_with_tbl, which simplifies things quite a bit. Signed-off-by: Christoph Hellwig <hch@lst.de> --- arch/mips/cavium-octeon/dma-octeon.c | 2 +- arch/powerpc/platforms/pseries/svm.c | 3 +-- drivers/xen/swiotlb-xen.c | 2 +- include/linux/swiotlb.h | 2 +- kernel/dma/swiotlb.c | 10 +++++----- 5 files changed, 9 insertions(+), 10 deletions(-) diff --git a/arch/mips/cavium-octeon/dma-octeon.c b/arch/mips/cavium-octeon/dma-octeon.c index df70308db0e697..020b8ce5b8ff7c 100644 --- a/arch/mips/cavium-octeon/dma-octeon.c +++ b/arch/mips/cavium-octeon/dma-octeon.c @@ -245,6 +245,6 @@ void __init plat_swiotlb_setup(void) panic("%s: Failed to allocate %zu bytes align=%lx\n", __func__, swiotlbsize, PAGE_SIZE); - if (swiotlb_init_with_tbl(octeon_swiotlb, swiotlb_nslabs, 1) == -ENOMEM) + if (swiotlb_init_with_tbl(octeon_swiotlb, swiotlbsize, 1) == -ENOMEM) panic("Cannot allocate SWIOTLB buffer"); } diff --git a/arch/powerpc/platforms/pseries/svm.c b/arch/powerpc/platforms/pseries/svm.c index 1d829e257996fb..4d281ff56ce96f 100644 --- a/arch/powerpc/platforms/pseries/svm.c +++ b/arch/powerpc/platforms/pseries/svm.c @@ -52,10 +52,9 @@ void __init svm_swiotlb_init(void) bytes = io_tlb_nslabs << IO_TLB_SHIFT; vstart = memblock_alloc(PAGE_ALIGN(bytes), PAGE_SIZE); - if (vstart && !swiotlb_init_with_tbl(vstart, io_tlb_nslabs, false)) + if (vstart && !swiotlb_init_with_tbl(vstart, bytes, false)) return; - memblock_free_early(__pa(vstart), PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT)); panic("SVM: Cannot allocate SWIOTLB buffer"); diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 4c89afc0df6289..18d79f07b507ce 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -249,7 +249,7 @@ void __init xen_swiotlb_init_early(void) panic("%s (rc:%d)", xen_swiotlb_error(XEN_SWIOTLB_EFIXUP), rc); } - if (swiotlb_init_with_tbl(start, nslabs, false)) + if (swiotlb_init_with_tbl(start, bytes, false)) panic("Cannot allocate SWIOTLB buffer"); swiotlb_set_max_segment(PAGE_SIZE); } diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index 216854a5e5134b..d1d40ca5014b54 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -36,7 +36,7 @@ enum swiotlb_force { #define IO_TLB_DEFAULT_SIZE (64UL<<20) extern void swiotlb_init(int verbose); -int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose); +int swiotlb_init_with_tbl(char *tlb, size_t bytes, int verbose); unsigned long swiotlb_size_or_default(void); extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs); extern int swiotlb_late_init_with_default_size(size_t default_size); diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 0a5b6f7e75bce6..c7b3dd86db7f56 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -166,9 +166,9 @@ void __init swiotlb_update_mem_attributes(void) memset(vaddr, 0, bytes); } -int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) +int __init swiotlb_init_with_tbl(char *tlb, size_t bytes, int verbose) { - unsigned long bytes = nslabs << IO_TLB_SHIFT, i; + unsigned long nslabs = bytes >> IO_TLB_SHIFT, i; struct io_tlb_mem *mem; size_t alloc_size; @@ -209,17 +209,17 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) void __init swiotlb_init(int verbose) { - size_t bytes = PAGE_ALIGN(default_nslabs << IO_TLB_SHIFT); + size_t bytes = default_nslabs << IO_TLB_SHIFT; void *tlb; if (swiotlb_force == SWIOTLB_NO_FORCE) return; /* Get IO TLB memory from the low pages */ - tlb = memblock_alloc_low(bytes, PAGE_SIZE); + tlb = memblock_alloc_low(PAGE_ALIGN(bytes), PAGE_SIZE); if (!tlb) goto fail; - if (swiotlb_init_with_tbl(tlb, default_nslabs, verbose)) + if (swiotlb_init_with_tbl(tlb, bytes, verbose)) goto fail_free_mem; return; -- 2.30.1
next prev parent reply other threads:[~2021-04-22 7:20 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-04-22 7:19 cleanup and fix swiotlb sizing Christoph Hellwig 2021-04-22 7:19 ` Christoph Hellwig [this message] 2021-04-22 7:19 ` [PATCH 2/7] swiotlb: use swiotlb_size_or_default in swiotlb_init Christoph Hellwig 2021-04-22 7:19 ` [PATCH 3/7] swiotlb: use swiotlb_adjust_size in setup_io_tlb_npages Christoph Hellwig 2021-04-22 7:19 ` [PATCH 4/7] powerpc/pseries: simplify svm_swiotlb_init Christoph Hellwig 2021-04-22 7:19 ` [PATCH 5/7] MIPS/octeon: simplify swiotlb initialization Christoph Hellwig 2021-04-22 7:19 ` [PATCH 6/7] swiotlb: replace default_nslabs with a byte value Christoph Hellwig 2021-04-22 7:19 ` [PATCH 7/7] swiotlb: don't override the command line in swiotlb_adjust_size Christoph Hellwig 2021-04-23 5:23 ` Tom Lendacky
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