linux-kernel - Re: [PATCH v7 05/15] swiotlb: Add a new get_io_tlb

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Date:   Tue, 18 May 2021 14:51:52 +0800
From:   Claire Chang <tientzu@...omium.org>
To:     Rob Herring <robh+dt@...nel.org>, mpe@...erman.id.au,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
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Subject: Re: [PATCH v7 05/15] swiotlb: Add a new get_io_tlb_mem getter

Still keep this function because directly using dev->dma_io_tlb_mem
will cause issues for memory allocation for existing devices. The pool
can't support atomic coherent allocation so we need to distinguish the
per device pool and the default pool in swiotlb_alloc.