From: Stefano Stabellini <sstabellini@kernel.org>
To: Claire Chang <tientzu@chromium.org>
Cc: Rob Herring <robh+dt@kernel.org>,
mpe@ellerman.id.au, Joerg Roedel <joro@8bytes.org>,
Will Deacon <will@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
boris.ostrovsky@oracle.com, jgross@suse.com,
Christoph Hellwig <hch@lst.de>,
Marek Szyprowski <m.szyprowski@samsung.com>,
benh@kernel.crashing.org, paulus@samba.org,
"list@263.net:IOMMU DRIVERS" <iommu@lists.linux-foundation.org>,
sstabellini@kernel.org, Robin Murphy <robin.murphy@arm.com>,
grant.likely@arm.com, xypron.glpk@gmx.de,
Thierry Reding <treding@nvidia.com>,
mingo@kernel.org, bauerman@linux.ibm.com, peterz@infradead.org,
Greg KH <gregkh@linuxfoundation.org>,
Saravana Kannan <saravanak@google.com>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
heikki.krogerus@linux.intel.com,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Randy Dunlap <rdunlap@infradead.org>,
Dan Williams <dan.j.williams@intel.com>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
linux-devicetree <devicetree@vger.kernel.org>,
lkml <linux-kernel@vger.kernel.org>,
linuxppc-dev@lists.ozlabs.org, xen-devel@lists.xenproject.org,
Nicolas Boichat <drinkcat@chromium.org>,
Jim Quinlan <james.quinlan@broadcom.com>,
tfiga@chromium.org, bskeggs@redhat.com, bhelgaas@google.com,
chris@chris-wilson.co.uk, daniel@ffwll.ch, airlied@linux.ie,
dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
jani.nikula@linux.intel.com, jxgao@google.com,
joonas.lahtinen@linux.intel.com, linux-pci@vger.kernel.org,
maarten.lankhorst@linux.intel.com, matthew.auld@intel.com,
rodrigo.vivi@intel.com, thomas.hellstrom@linux.intel.com,
thomas.lendacky@amd.com
Subject: Re: [PATCH v14 01/12] swiotlb: Refactor swiotlb init functions
Date: Tue, 22 Jun 2021 14:02:58 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.21.2106221402390.24906@sstabellini-ThinkPad-T480s> (raw)
In-Reply-To: <20210619034043.199220-2-tientzu@chromium.org>
On Sat, 19 Jun 2021, Claire Chang wrote:
> Add a new function, swiotlb_init_io_tlb_mem, for the io_tlb_mem struct
> initialization to make the code reusable.
>
> Signed-off-by: Claire Chang <tientzu@chromium.org>
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> Tested-by: Stefano Stabellini <sstabellini@kernel.org>
> Tested-by: Will Deacon <will@kernel.org>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
> ---
> kernel/dma/swiotlb.c | 50 ++++++++++++++++++++++----------------------
> 1 file changed, 25 insertions(+), 25 deletions(-)
>
> diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
> index 52e2ac526757..1f9b2b9e7490 100644
> --- a/kernel/dma/swiotlb.c
> +++ b/kernel/dma/swiotlb.c
> @@ -168,9 +168,28 @@ void __init swiotlb_update_mem_attributes(void)
> memset(vaddr, 0, bytes);
> }
>
> -int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
> +static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start,
> + unsigned long nslabs, bool late_alloc)
> {
> + void *vaddr = phys_to_virt(start);
> unsigned long bytes = nslabs << IO_TLB_SHIFT, i;
> +
> + mem->nslabs = nslabs;
> + mem->start = start;
> + mem->end = mem->start + bytes;
> + mem->index = 0;
> + mem->late_alloc = late_alloc;
> + spin_lock_init(&mem->lock);
> + for (i = 0; i < mem->nslabs; i++) {
> + mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);
> + mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
> + mem->slots[i].alloc_size = 0;
> + }
> + memset(vaddr, 0, bytes);
> +}
> +
> +int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
> +{
> struct io_tlb_mem *mem;
> size_t alloc_size;
>
> @@ -186,16 +205,8 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
> if (!mem)
> panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
> __func__, alloc_size, PAGE_SIZE);
> - mem->nslabs = nslabs;
> - mem->start = __pa(tlb);
> - mem->end = mem->start + bytes;
> - mem->index = 0;
> - spin_lock_init(&mem->lock);
> - for (i = 0; i < mem->nslabs; i++) {
> - mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);
> - mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
> - mem->slots[i].alloc_size = 0;
> - }
> +
> + swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, false);
>
> io_tlb_default_mem = mem;
> if (verbose)
> @@ -282,8 +293,8 @@ swiotlb_late_init_with_default_size(size_t default_size)
> int
> swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
> {
> - unsigned long bytes = nslabs << IO_TLB_SHIFT, i;
> struct io_tlb_mem *mem;
> + unsigned long bytes = nslabs << IO_TLB_SHIFT;
>
> if (swiotlb_force == SWIOTLB_NO_FORCE)
> return 0;
> @@ -297,20 +308,9 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
> if (!mem)
> return -ENOMEM;
>
> - mem->nslabs = nslabs;
> - mem->start = virt_to_phys(tlb);
> - mem->end = mem->start + bytes;
> - mem->index = 0;
> - mem->late_alloc = 1;
> - spin_lock_init(&mem->lock);
> - for (i = 0; i < mem->nslabs; i++) {
> - mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);
> - mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
> - mem->slots[i].alloc_size = 0;
> - }
> -
> + memset(mem, 0, sizeof(*mem));
> set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT);
> - memset(tlb, 0, bytes);
> + swiotlb_init_io_tlb_mem(mem, virt_to_phys(tlb), nslabs, true);
>
> io_tlb_default_mem = mem;
> swiotlb_print_info();
> --
> 2.32.0.288.g62a8d224e6-goog
>
next prev parent reply other threads:[~2021-06-22 21:03 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-19 3:40 [PATCH v14 00/12] Restricted DMA Claire Chang
2021-06-19 3:40 ` [PATCH v14 01/12] swiotlb: Refactor swiotlb init functions Claire Chang
2021-06-22 21:02 ` Stefano Stabellini [this message]
2021-06-19 3:40 ` [PATCH v14 02/12] swiotlb: Refactor swiotlb_create_debugfs Claire Chang
2021-06-19 3:40 ` [PATCH v14 03/12] swiotlb: Set dev->dma_io_tlb_mem to the swiotlb pool used Claire Chang
2021-06-19 3:40 ` [PATCH v14 04/12] swiotlb: Update is_swiotlb_buffer to add a struct device argument Claire Chang
2021-06-19 3:40 ` [PATCH v14 05/12] swiotlb: Update is_swiotlb_active " Claire Chang
2021-06-19 3:40 ` [PATCH v14 06/12] swiotlb: Use is_swiotlb_force_bounce for swiotlb data bouncing Claire Chang
2021-06-23 16:39 ` Qian Cai
2021-06-23 18:37 ` Will Deacon
2021-06-23 18:44 ` Qian Cai
2021-06-24 5:43 ` Christoph Hellwig
2021-06-24 6:05 ` Claire Chang
2021-06-24 11:14 ` Robin Murphy
2021-06-24 11:18 ` Will Deacon
2021-06-24 11:34 ` Robin Murphy
2021-06-24 11:48 ` Will Deacon
2021-06-24 14:10 ` Qian Cai
2021-06-24 15:55 ` Konrad Rzeszutek Wilk
2021-06-24 15:58 ` Claire Chang
2021-06-24 19:20 ` Konrad Rzeszutek Wilk
2021-06-19 3:40 ` [PATCH v14 07/12] swiotlb: Move alloc_size to swiotlb_find_slots Claire Chang
2021-06-19 3:40 ` [PATCH v14 08/12] swiotlb: Refactor swiotlb_tbl_unmap_single Claire Chang
2021-06-19 3:40 ` [PATCH v14 09/12] swiotlb: Add restricted DMA alloc/free support Claire Chang
2021-06-19 3:40 ` [PATCH v14 10/12] swiotlb: Add restricted DMA pool initialization Claire Chang
2021-06-19 3:40 ` [PATCH v14 11/12] dt-bindings: of: Add restricted DMA pool Claire Chang
2021-06-19 3:40 ` [PATCH v14 12/12] of: Add plumbing for " Claire Chang
2021-06-23 8:38 ` [PATCH v14 00/12] Restricted DMA Konrad Rzeszutek Wilk
2021-06-23 9:01 ` Claire Chang
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