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From: Dongli Zhang <dongli.zhang@oracle.com>
To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
	iommu@lists.linux-foundation.org, linux-mips@vger.kernel.org,
	linux-mmc@vger.kernel.org, linux-pci@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org, nouveau@lists.freedesktop.org,
	x86@kernel.org, xen-devel@lists.xenproject.org
Cc: ulf.hansson@linaro.org, airlied@linux.ie,
	benh@kernel.crashing.org, joonas.lahtinen@linux.intel.com,
	adrian.hunter@intel.com, paulus@samba.org, hpa@zytor.com,
	mingo@kernel.org, m.szyprowski@samsung.com,
	sstabellini@kernel.org, mpe@ellerman.id.au, joe.jin@oracle.com,
	hch@lst.de, peterz@infradead.org, mingo@redhat.com,
	matthew.auld@intel.com, bskeggs@redhat.com,
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	jani.nikula@linux.intel.com, bp@alien8.de,
	rodrigo.vivi@intel.com, bhelgaas@google.com,
	boris.ostrovsky@oracle.com, chris@chris-wilson.co.uk,
	jgross@suse.com, tsbogend@alpha.franken.de,
	linux-kernel@vger.kernel.org, tglx@linutronix.de,
	bauerman@linux.ibm.com, daniel@ffwll.ch,
	akpm@linux-foundation.org, robin.murphy@arm.com, rppt@kernel.org
Subject: [Nouveau] [PATCH RFC v1 1/6] swiotlb: define new enumerated type
Date: Wed,  3 Feb 2021 15:37:04 -0800
Message-ID: <20210203233709.19819-2-dongli.zhang@oracle.com> (raw)
In-Reply-To: <20210203233709.19819-1-dongli.zhang@oracle.com>

This is just to define new enumerated type without functional change.

The 'SWIOTLB_LO' is to index legacy 32-bit swiotlb buffer, while the
'SWIOTLB_HI' is to index the 64-bit buffer.

This is to prepare to enable 64-bit swiotlb.

Cc: Joe Jin <joe.jin@oracle.com>
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
---
 include/linux/swiotlb.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index d9c9fc9ca5d2..ca125c1b1281 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -17,6 +17,12 @@ enum swiotlb_force {
 	SWIOTLB_NO_FORCE,	/* swiotlb=noforce */
 };
 
+enum swiotlb_t {
+	SWIOTLB_LO,
+	SWIOTLB_HI,
+	SWIOTLB_MAX,
+};
+
 /*
  * Maximum allowable number of contiguous slabs to map,
  * must be a power of 2.  What is the appropriate value ?
-- 
2.17.1

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Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-03 23:37 [Nouveau] [PATCH RFC v1 0/6] swiotlb: 64-bit DMA buffer Dongli Zhang
2021-02-03 23:37 ` Dongli Zhang [this message]
2021-02-03 23:37 ` [Nouveau] [PATCH RFC v1 2/6] swiotlb: convert variables to arrays Dongli Zhang
2021-02-04  7:29   ` Christoph Hellwig
2021-02-04 11:49     ` Robin Murphy
2021-02-04 19:31       ` Konrad Rzeszutek Wilk
2021-02-03 23:37 ` [Nouveau] [PATCH RFC v1 3/6] swiotlb: introduce swiotlb_get_type() to calculate swiotlb buffer type Dongli Zhang
2021-02-03 23:37 ` [Nouveau] [PATCH RFC v1 4/6] swiotlb: enable 64-bit swiotlb Dongli Zhang
2021-02-03 23:37 ` [Nouveau] [PATCH RFC v1 5/6] xen-swiotlb: convert variables to arrays Dongli Zhang
2021-02-04  8:40   ` Christoph Hellwig
2021-02-07 15:56     ` Christoph Hellwig
2021-02-19 20:32       ` Konrad Rzeszutek Wilk
2021-02-19 23:59         ` Boris Ostrovsky
2021-02-23  1:22         ` Stefano Stabellini
2021-02-03 23:37 ` [Nouveau] [PATCH RFC v1 6/6] xen-swiotlb: enable 64-bit xen-swiotlb Dongli Zhang

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