From: Christoph Hellwig <hch@lst•de>
To: Claire Chang <tientzu@chromium•org>
Cc: heikki.krogerus@linux•intel.com, peterz@infradead•org,
grant.likely@arm•com, paulus@samba•org, frowand.list@gmail•com,
mingo@kernel•org, m.szyprowski@samsung•com,
sstabellini@kernel•org, saravanak@google•com, joro@8bytes•org,
rafael.j.wysocki@intel•com, hch@lst•de,
bgolaszewski@baylibre•com, xen-devel@lists•xenproject.org,
treding@nvidia•com, devicetree@vger•kernel.org, will@kernel•org,
konrad.wilk@oracle•com, dan.j.williams@intel•com,
linuxppc-dev@lists•ozlabs.org, robh+dt@kernel•org,
boris.ostrovsky@oracle•com, andriy.shevchenko@linux•intel.com,
jgross@suse•com, drinkcat@chromium•org,
gregkh@linuxfoundation•org, rdunlap@infradead•org,
linux-kernel@vger•kernel.org, tfiga@chromium•org,
iommu@lists•linux-foundation.org, xypron.glpk@gmx•de,
robin.murphy@arm•com, bauerman@linux•ibm.com
Subject: Re: [RFC PATCH v3 2/6] swiotlb: Add restricted DMA pool
Date: Wed, 13 Jan 2021 13:42:09 +0100 [thread overview]
Message-ID: <20210113124209.GA1383@lst.de> (raw)
In-Reply-To: <20210106034124.30560-3-tientzu@chromium.org>
> +#ifdef CONFIG_SWIOTLB
> + struct io_tlb_mem *dma_io_tlb_mem;
> #endif
Please add a new config option for this code instead of always building
it when swiotlb is enabled.
> +static int swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start,
> + size_t size)
Can you split the refactoring in swiotlb.c into one or more prep
patches?
> +static int rmem_swiotlb_device_init(struct reserved_mem *rmem,
> + struct device *dev)
> +{
> + struct io_tlb_mem *mem = rmem->priv;
> + int ret;
> +
> + if (dev->dma_io_tlb_mem)
> + return -EBUSY;
> +
> + if (!mem) {
> + mem = kzalloc(sizeof(*mem), GFP_KERNEL);
> + if (!mem)
> + return -ENOMEM;
What is the calling convention here that allows for a NULL and non-NULL
private data?
next prev parent reply other threads:[~2021-01-13 12:45 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-06 3:41 [RFC PATCH v3 0/6] Restricted DMA Claire Chang
2021-01-06 3:41 ` [RFC PATCH v3 1/6] swiotlb: Add io_tlb_mem struct Claire Chang
2021-01-13 11:50 ` Christoph Hellwig
2021-01-06 3:41 ` [RFC PATCH v3 2/6] swiotlb: Add restricted DMA pool Claire Chang
2021-01-06 7:50 ` Greg KH
2021-01-13 11:51 ` Christoph Hellwig
2021-01-13 12:29 ` Greg KH
2021-01-13 12:37 ` Christoph Hellwig
2021-01-06 18:52 ` Konrad Rzeszutek Wilk
2021-01-07 17:39 ` Claire Chang
2021-01-07 17:57 ` Konrad Rzeszutek Wilk
2021-01-07 18:09 ` Florian Fainelli
2021-01-07 21:19 ` Konrad Rzeszutek Wilk
2021-01-12 23:52 ` Florian Fainelli
2021-01-25 5:26 ` Jon Masters
2021-01-13 1:53 ` Robin Murphy
2021-01-13 0:03 ` Florian Fainelli
2021-01-13 13:59 ` Nicolas Saenz Julienne
2021-01-13 15:27 ` Robin Murphy
2021-01-13 17:43 ` Florian Fainelli
2021-01-13 18:03 ` Robin Murphy
2021-01-13 12:42 ` Christoph Hellwig [this message]
2021-01-14 9:06 ` Claire Chang
2021-01-06 3:41 ` [RFC PATCH v3 3/6] swiotlb: Use restricted DMA pool if available Claire Chang
2021-01-12 23:39 ` Florian Fainelli
2021-01-13 12:44 ` Christoph Hellwig
2021-01-06 3:41 ` [RFC PATCH v3 4/6] swiotlb: Add restricted DMA alloc/free support Claire Chang
2021-01-12 23:41 ` Florian Fainelli
2021-01-13 12:48 ` Christoph Hellwig
2021-01-13 18:27 ` Robin Murphy
2021-01-13 18:32 ` Christoph Hellwig
2021-01-06 3:41 ` [RFC PATCH v3 5/6] dt-bindings: of: Add restricted DMA pool Claire Chang
2021-01-06 18:57 ` Konrad Rzeszutek Wilk
2021-01-07 17:39 ` Claire Chang
2021-01-07 18:00 ` Konrad Rzeszutek Wilk
2021-01-07 18:14 ` Florian Fainelli
2021-01-12 7:47 ` Claire Chang
2021-01-20 16:53 ` Rob Herring
2021-01-20 17:30 ` Robin Murphy
2021-01-20 21:31 ` Rob Herring
2021-01-21 1:09 ` Robin Murphy
2021-01-21 15:48 ` Rob Herring
2021-01-21 17:29 ` Robin Murphy
2021-01-06 3:41 ` [RFC PATCH v3 6/6] of: Add plumbing for " Claire Chang
2021-01-12 23:48 ` Florian Fainelli
2021-01-14 9:08 ` Claire Chang
2021-01-14 18:52 ` Florian Fainelli
2021-01-15 3:46 ` Claire Chang
2021-01-06 18:48 ` [RFC PATCH v3 0/6] Restricted DMA Florian Fainelli
2021-01-07 17:38 ` Claire Chang
2021-01-07 17:42 ` Claire Chang
2021-01-07 17:59 ` Florian Fainelli
2021-01-12 7:48 ` Claire Chang
2021-01-12 18:01 ` Florian Fainelli
2021-01-13 2:29 ` Tomasz Figa
2021-01-13 3:56 ` Florian Fainelli
2021-01-13 4:25 ` Tomasz Figa
2021-01-13 4:41 ` Florian Fainelli
2021-02-09 6:27 ` Claire Chang
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