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From: Claire Chang <tientzu@chromium.org>
To: 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>
Cc: 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, tientzu@chromium.org, 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
Subject: [PATCH v12 08/12] swiotlb: Refactor swiotlb_tbl_unmap_single
Date: Wed, 16 Jun 2021 14:21:53 +0800	[thread overview]
Message-ID: <20210616062157.953777-9-tientzu@chromium.org> (raw)
In-Reply-To: <20210616062157.953777-1-tientzu@chromium.org>

Add a new function, swiotlb_release_slots, to make the code reusable for
supporting different bounce buffer pools.

Signed-off-by: Claire Chang <tientzu@chromium.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 kernel/dma/swiotlb.c | 35 ++++++++++++++++++++---------------
 1 file changed, 20 insertions(+), 15 deletions(-)

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index b59e689aa79d..688c6e0c43ff 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -555,27 +555,15 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
 	return tlb_addr;
 }
 
-/*
- * tlb_addr is the physical address of the bounce buffer to unmap.
- */
-void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
-			      size_t mapping_size, enum dma_data_direction dir,
-			      unsigned long attrs)
+static void swiotlb_release_slots(struct device *dev, phys_addr_t tlb_addr)
 {
-	struct io_tlb_mem *mem = hwdev->dma_io_tlb_mem;
+	struct io_tlb_mem *mem = dev->dma_io_tlb_mem;
 	unsigned long flags;
-	unsigned int offset = swiotlb_align_offset(hwdev, tlb_addr);
+	unsigned int offset = swiotlb_align_offset(dev, tlb_addr);
 	int index = (tlb_addr - offset - mem->start) >> IO_TLB_SHIFT;
 	int nslots = nr_slots(mem->slots[index].alloc_size + offset);
 	int count, i;
 
-	/*
-	 * First, sync the memory before unmapping the entry
-	 */
-	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
-	    (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
-		swiotlb_bounce(hwdev, tlb_addr, mapping_size, DMA_FROM_DEVICE);
-
 	/*
 	 * Return the buffer to the free list by setting the corresponding
 	 * entries to indicate the number of contiguous entries available.
@@ -610,6 +598,23 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 	spin_unlock_irqrestore(&mem->lock, flags);
 }
 
+/*
+ * tlb_addr is the physical address of the bounce buffer to unmap.
+ */
+void swiotlb_tbl_unmap_single(struct device *dev, phys_addr_t tlb_addr,
+			      size_t mapping_size, enum dma_data_direction dir,
+			      unsigned long attrs)
+{
+	/*
+	 * First, sync the memory before unmapping the entry
+	 */
+	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
+	    (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
+		swiotlb_bounce(dev, tlb_addr, mapping_size, DMA_FROM_DEVICE);
+
+	swiotlb_release_slots(dev, tlb_addr);
+}
+
 void swiotlb_sync_single_for_device(struct device *dev, phys_addr_t tlb_addr,
 		size_t size, enum dma_data_direction dir)
 {
-- 
2.32.0.272.g935e593368-goog


WARNING: multiple messages have this Message-ID
From: Claire Chang <tientzu@chromium.org>
To: 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>
Cc: heikki.krogerus@linux.intel.com,
	thomas.hellstrom@linux.intel.com, peterz@infradead.org,
	joonas.lahtinen@linux.intel.com, dri-devel@lists.freedesktop.org,
	chris@chris-wilson.co.uk, grant.likely@arm.com, paulus@samba.org,
	mingo@kernel.org, jxgao@google.com, sstabellini@kernel.org,
	Saravana Kannan <saravanak@google.com>,
	xypron.glpk@gmx.de,
	"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>,
	bskeggs@redhat.com, linux-pci@vger.kernel.org,
	xen-devel@lists.xenproject.org,
	Thierry Reding <treding@nvidia.com>,
	intel-gfx@lists.freedesktop.org, matthew.auld@intel.com,
	linux-devicetree <devicetree@vger.kernel.org>,
	daniel@ffwll.ch, airlied@linux.ie,
	maarten.lankhorst@linux.intel.com, linuxppc-dev@lists.ozlabs.org,
	jani.nikula@linux.intel.com,
	Nicolas Boichat <drinkcat@chromium.org>,
	rodrigo.vivi@intel.com, bhelgaas@google.com,
	tientzu@chromium.org, Dan Williams <dan.j.williams@intel.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Greg KH <gregkh@linuxfoundation.org>,
	Randy Dunlap <rdunlap@infradead.org>,
	lkml <linux-kernel@vger.kernel.org>,
	tfiga@chromium.org,
	"list@263.net:IOMMU DRIVERS" <iommu@lists.linux-foundation.org>,
	Jim Quinlan <james.quinlan@broadcom.com>,
	Robin Murphy <robin.murphy@arm.com>,
	bauerman@linux.ibm.com
Subject: [PATCH v12 08/12] swiotlb: Refactor swiotlb_tbl_unmap_single
Date: Wed, 16 Jun 2021 14:21:53 +0800	[thread overview]
Message-ID: <20210616062157.953777-9-tientzu@chromium.org> (raw)
In-Reply-To: <20210616062157.953777-1-tientzu@chromium.org>

Add a new function, swiotlb_release_slots, to make the code reusable for
supporting different bounce buffer pools.

Signed-off-by: Claire Chang <tientzu@chromium.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 kernel/dma/swiotlb.c | 35 ++++++++++++++++++++---------------
 1 file changed, 20 insertions(+), 15 deletions(-)

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index b59e689aa79d..688c6e0c43ff 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -555,27 +555,15 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
 	return tlb_addr;
 }
 
-/*
- * tlb_addr is the physical address of the bounce buffer to unmap.
- */
-void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
-			      size_t mapping_size, enum dma_data_direction dir,
-			      unsigned long attrs)
+static void swiotlb_release_slots(struct device *dev, phys_addr_t tlb_addr)
 {
-	struct io_tlb_mem *mem = hwdev->dma_io_tlb_mem;
+	struct io_tlb_mem *mem = dev->dma_io_tlb_mem;
 	unsigned long flags;
-	unsigned int offset = swiotlb_align_offset(hwdev, tlb_addr);
+	unsigned int offset = swiotlb_align_offset(dev, tlb_addr);
 	int index = (tlb_addr - offset - mem->start) >> IO_TLB_SHIFT;
 	int nslots = nr_slots(mem->slots[index].alloc_size + offset);
 	int count, i;
 
-	/*
-	 * First, sync the memory before unmapping the entry
-	 */
-	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
-	    (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
-		swiotlb_bounce(hwdev, tlb_addr, mapping_size, DMA_FROM_DEVICE);
-
 	/*
 	 * Return the buffer to the free list by setting the corresponding
 	 * entries to indicate the number of contiguous entries available.
@@ -610,6 +598,23 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 	spin_unlock_irqrestore(&mem->lock, flags);
 }
 
+/*
+ * tlb_addr is the physical address of the bounce buffer to unmap.
+ */
+void swiotlb_tbl_unmap_single(struct device *dev, phys_addr_t tlb_addr,
+			      size_t mapping_size, enum dma_data_direction dir,
+			      unsigned long attrs)
+{
+	/*
+	 * First, sync the memory before unmapping the entry
+	 */
+	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
+	    (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
+		swiotlb_bounce(dev, tlb_addr, mapping_size, DMA_FROM_DEVICE);
+
+	swiotlb_release_slots(dev, tlb_addr);
+}
+
 void swiotlb_sync_single_for_device(struct device *dev, phys_addr_t tlb_addr,
 		size_t size, enum dma_data_direction dir)
 {
-- 
2.32.0.272.g935e593368-goog


WARNING: multiple messages have this Message-ID
From: Claire Chang <tientzu@chromium.org>
To: 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>
Cc: heikki.krogerus@linux.intel.com,
	thomas.hellstrom@linux.intel.com, peterz@infradead.org,
	benh@kernel.crashing.org, joonas.lahtinen@linux.intel.com,
	dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk,
	grant.likely@arm.com, paulus@samba.org, mingo@kernel.org,
	jxgao@google.com, sstabellini@kernel.org,
	Saravana Kannan <saravanak@google.com>,
	xypron.glpk@gmx.de,
	"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>,
	bskeggs@redhat.com, linux-pci@vger.kernel.org,
	xen-devel@lists.xenproject.org,
	Thierry Reding <treding@nvidia.com>,
	intel-gfx@lists.freedesktop.org, matthew.auld@intel.com,
	linux-devicetree <devicetree@vger.kernel.org>,
	daniel@ffwll.ch, airlied@linux.ie,
	maarten.lankhorst@linux.intel.com, linuxppc-dev@lists.ozlabs.org,
	jani.nikula@linux.intel.com,
	Nicolas Boichat <drinkcat@chromium.org>,
	rodrigo.vivi@intel.com, bhelgaas@google.com,
	tientzu@chromium.org, Dan Williams <dan.j.williams@intel.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Greg KH <gregkh@linuxfoundation.org>,
	Randy Dunlap <rdunlap@infradead.org>,
	lkml <linux-kernel@vger.kernel.org>,
	"list@263.net:IOMMU DRIVERS" <iommu@lists.linux-foundation.org>,
	Jim Quinlan <james.quinlan@broadcom.com>,
	Robin Murphy <robin.murphy@arm.com>,
	bauerman@linux.ibm.com
Subject: [PATCH v12 08/12] swiotlb: Refactor swiotlb_tbl_unmap_single
Date: Wed, 16 Jun 2021 14:21:53 +0800	[thread overview]
Message-ID: <20210616062157.953777-9-tientzu@chromium.org> (raw)
In-Reply-To: <20210616062157.953777-1-tientzu@chromium.org>

Add a new function, swiotlb_release_slots, to make the code reusable for
supporting different bounce buffer pools.

Signed-off-by: Claire Chang <tientzu@chromium.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 kernel/dma/swiotlb.c | 35 ++++++++++++++++++++---------------
 1 file changed, 20 insertions(+), 15 deletions(-)

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index b59e689aa79d..688c6e0c43ff 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -555,27 +555,15 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
 	return tlb_addr;
 }
 
-/*
- * tlb_addr is the physical address of the bounce buffer to unmap.
- */
-void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
-			      size_t mapping_size, enum dma_data_direction dir,
-			      unsigned long attrs)
+static void swiotlb_release_slots(struct device *dev, phys_addr_t tlb_addr)
 {
-	struct io_tlb_mem *mem = hwdev->dma_io_tlb_mem;
+	struct io_tlb_mem *mem = dev->dma_io_tlb_mem;
 	unsigned long flags;
-	unsigned int offset = swiotlb_align_offset(hwdev, tlb_addr);
+	unsigned int offset = swiotlb_align_offset(dev, tlb_addr);
 	int index = (tlb_addr - offset - mem->start) >> IO_TLB_SHIFT;
 	int nslots = nr_slots(mem->slots[index].alloc_size + offset);
 	int count, i;
 
-	/*
-	 * First, sync the memory before unmapping the entry
-	 */
-	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
-	    (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
-		swiotlb_bounce(hwdev, tlb_addr, mapping_size, DMA_FROM_DEVICE);
-
 	/*
 	 * Return the buffer to the free list by setting the corresponding
 	 * entries to indicate the number of contiguous entries available.
@@ -610,6 +598,23 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 	spin_unlock_irqrestore(&mem->lock, flags);
 }
 
+/*
+ * tlb_addr is the physical address of the bounce buffer to unmap.
+ */
+void swiotlb_tbl_unmap_single(struct device *dev, phys_addr_t tlb_addr,
+			      size_t mapping_size, enum dma_data_direction dir,
+			      unsigned long attrs)
+{
+	/*
+	 * First, sync the memory before unmapping the entry
+	 */
+	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
+	    (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
+		swiotlb_bounce(dev, tlb_addr, mapping_size, DMA_FROM_DEVICE);
+
+	swiotlb_release_slots(dev, tlb_addr);
+}
+
 void swiotlb_sync_single_for_device(struct device *dev, phys_addr_t tlb_addr,
 		size_t size, enum dma_data_direction dir)
 {
-- 
2.32.0.272.g935e593368-goog

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

WARNING: multiple messages have this Message-ID
From: Claire Chang <tientzu@chromium.org>
To: 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>
Cc: heikki.krogerus@linux.intel.com,
	thomas.hellstrom@linux.intel.com, peterz@infradead.org,
	dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk,
	grant.likely@arm.com, paulus@samba.org, mingo@kernel.org,
	jxgao@google.com, sstabellini@kernel.org,
	Saravana Kannan <saravanak@google.com>,
	xypron.glpk@gmx.de,
	"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>,
	bskeggs@redhat.com, linux-pci@vger.kernel.org,
	xen-devel@lists.xenproject.org,
	Thierry Reding <treding@nvidia.com>,
	intel-gfx@lists.freedesktop.org, matthew.auld@intel.com,
	linux-devicetree <devicetree@vger.kernel.org>,
	airlied@linux.ie, Robin Murphy <robin.murphy@arm.com>,
	Nicolas Boichat <drinkcat@chromium.org>,
	rodrigo.vivi@intel.com, bhelgaas@google.com,
	tientzu@chromium.org, Dan Williams <dan.j.williams@intel.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Greg KH <gregkh@linuxfoundation.org>,
	Randy Dunlap <rdunlap@infradead.org>,
	lkml <linux-kernel@vger.kernel.org>,
	tfiga@chromium.org,
	"list@263.net:IOMMU DRIVERS" <iommu@lists.linux-foundation.org>,
	Jim Quinlan <james.quinlan@broadcom.com>,
	linuxppc-dev@lists.ozlabs.org, bauerman@linux.ibm.com
Subject: [PATCH v12 08/12] swiotlb: Refactor swiotlb_tbl_unmap_single
Date: Wed, 16 Jun 2021 14:21:53 +0800	[thread overview]
Message-ID: <20210616062157.953777-9-tientzu@chromium.org> (raw)
In-Reply-To: <20210616062157.953777-1-tientzu@chromium.org>

Add a new function, swiotlb_release_slots, to make the code reusable for
supporting different bounce buffer pools.

Signed-off-by: Claire Chang <tientzu@chromium.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 kernel/dma/swiotlb.c | 35 ++++++++++++++++++++---------------
 1 file changed, 20 insertions(+), 15 deletions(-)

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index b59e689aa79d..688c6e0c43ff 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -555,27 +555,15 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
 	return tlb_addr;
 }
 
-/*
- * tlb_addr is the physical address of the bounce buffer to unmap.
- */
-void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
-			      size_t mapping_size, enum dma_data_direction dir,
-			      unsigned long attrs)
+static void swiotlb_release_slots(struct device *dev, phys_addr_t tlb_addr)
 {
-	struct io_tlb_mem *mem = hwdev->dma_io_tlb_mem;
+	struct io_tlb_mem *mem = dev->dma_io_tlb_mem;
 	unsigned long flags;
-	unsigned int offset = swiotlb_align_offset(hwdev, tlb_addr);
+	unsigned int offset = swiotlb_align_offset(dev, tlb_addr);
 	int index = (tlb_addr - offset - mem->start) >> IO_TLB_SHIFT;
 	int nslots = nr_slots(mem->slots[index].alloc_size + offset);
 	int count, i;
 
-	/*
-	 * First, sync the memory before unmapping the entry
-	 */
-	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
-	    (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
-		swiotlb_bounce(hwdev, tlb_addr, mapping_size, DMA_FROM_DEVICE);
-
 	/*
 	 * Return the buffer to the free list by setting the corresponding
 	 * entries to indicate the number of contiguous entries available.
@@ -610,6 +598,23 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 	spin_unlock_irqrestore(&mem->lock, flags);
 }
 
+/*
+ * tlb_addr is the physical address of the bounce buffer to unmap.
+ */
+void swiotlb_tbl_unmap_single(struct device *dev, phys_addr_t tlb_addr,
+			      size_t mapping_size, enum dma_data_direction dir,
+			      unsigned long attrs)
+{
+	/*
+	 * First, sync the memory before unmapping the entry
+	 */
+	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
+	    (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
+		swiotlb_bounce(dev, tlb_addr, mapping_size, DMA_FROM_DEVICE);
+
+	swiotlb_release_slots(dev, tlb_addr);
+}
+
 void swiotlb_sync_single_for_device(struct device *dev, phys_addr_t tlb_addr,
 		size_t size, enum dma_data_direction dir)
 {
-- 
2.32.0.272.g935e593368-goog


WARNING: multiple messages have this Message-ID
From: Claire Chang <tientzu@chromium.org>
To: 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>
Cc: heikki.krogerus@linux.intel.com,
	thomas.hellstrom@linux.intel.com, peterz@infradead.org,
	benh@kernel.crashing.org, dri-devel@lists.freedesktop.org,
	chris@chris-wilson.co.uk, grant.likely@arm.com, paulus@samba.org,
	mingo@kernel.org, jxgao@google.com, sstabellini@kernel.org,
	Saravana Kannan <saravanak@google.com>,
	xypron.glpk@gmx.de,
	"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>,
	bskeggs@redhat.com, linux-pci@vger.kernel.org,
	xen-devel@lists.xenproject.org,
	Thierry Reding <treding@nvidia.com>,
	intel-gfx@lists.freedesktop.org, matthew.auld@intel.com,
	linux-devicetree <devicetree@vger.kernel.org>,
	airlied@linux.ie, Robin Murphy <robin.murphy@arm.com>,
	Nicolas Boichat <drinkcat@chromium.org>,
	bhelgaas@google.com, tientzu@chromium.org,
	Dan Williams <dan.j.williams@intel.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Greg KH <gregkh@linuxfoundation.org>,
	Randy Dunlap <rdunlap@infradead.org>,
	lkml <linux-kernel@vger.kernel.org>,
	tfiga@chromium.org,
	"list@263.net:IOMMU DRIVERS" <iommu@lists.linux-foundation.org>,
	Jim Quinlan <james.quinlan@broadcom.com>,
	linuxppc-dev@lists.ozlabs.org, bauerman@linux.ibm.com
Subject: [Intel-gfx] [PATCH v12 08/12] swiotlb: Refactor swiotlb_tbl_unmap_single
Date: Wed, 16 Jun 2021 14:21:53 +0800	[thread overview]
Message-ID: <20210616062157.953777-9-tientzu@chromium.org> (raw)
In-Reply-To: <20210616062157.953777-1-tientzu@chromium.org>

Add a new function, swiotlb_release_slots, to make the code reusable for
supporting different bounce buffer pools.

Signed-off-by: Claire Chang <tientzu@chromium.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 kernel/dma/swiotlb.c | 35 ++++++++++++++++++++---------------
 1 file changed, 20 insertions(+), 15 deletions(-)

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index b59e689aa79d..688c6e0c43ff 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -555,27 +555,15 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
 	return tlb_addr;
 }
 
-/*
- * tlb_addr is the physical address of the bounce buffer to unmap.
- */
-void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
-			      size_t mapping_size, enum dma_data_direction dir,
-			      unsigned long attrs)
+static void swiotlb_release_slots(struct device *dev, phys_addr_t tlb_addr)
 {
-	struct io_tlb_mem *mem = hwdev->dma_io_tlb_mem;
+	struct io_tlb_mem *mem = dev->dma_io_tlb_mem;
 	unsigned long flags;
-	unsigned int offset = swiotlb_align_offset(hwdev, tlb_addr);
+	unsigned int offset = swiotlb_align_offset(dev, tlb_addr);
 	int index = (tlb_addr - offset - mem->start) >> IO_TLB_SHIFT;
 	int nslots = nr_slots(mem->slots[index].alloc_size + offset);
 	int count, i;
 
-	/*
-	 * First, sync the memory before unmapping the entry
-	 */
-	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
-	    (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
-		swiotlb_bounce(hwdev, tlb_addr, mapping_size, DMA_FROM_DEVICE);
-
 	/*
 	 * Return the buffer to the free list by setting the corresponding
 	 * entries to indicate the number of contiguous entries available.
@@ -610,6 +598,23 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 	spin_unlock_irqrestore(&mem->lock, flags);
 }
 
+/*
+ * tlb_addr is the physical address of the bounce buffer to unmap.
+ */
+void swiotlb_tbl_unmap_single(struct device *dev, phys_addr_t tlb_addr,
+			      size_t mapping_size, enum dma_data_direction dir,
+			      unsigned long attrs)
+{
+	/*
+	 * First, sync the memory before unmapping the entry
+	 */
+	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
+	    (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
+		swiotlb_bounce(dev, tlb_addr, mapping_size, DMA_FROM_DEVICE);
+
+	swiotlb_release_slots(dev, tlb_addr);
+}
+
 void swiotlb_sync_single_for_device(struct device *dev, phys_addr_t tlb_addr,
 		size_t size, enum dma_data_direction dir)
 {
-- 
2.32.0.272.g935e593368-goog

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  parent reply	other threads:[~2021-06-16  6:23 UTC|newest]

Thread overview: 97+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-16  6:21 [PATCH v12 00/12] Restricted DMA Claire Chang
2021-06-16  6:21 ` [Intel-gfx] " Claire Chang
2021-06-16  6:21 ` Claire Chang
2021-06-16  6:21 ` Claire Chang
2021-06-16  6:21 ` Claire Chang
2021-06-16  6:21 ` [PATCH v12 01/12] swiotlb: Refactor swiotlb init functions Claire Chang
2021-06-16  6:21   ` [Intel-gfx] " Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21 ` [PATCH v12 02/12] swiotlb: Refactor swiotlb_create_debugfs Claire Chang
2021-06-16  6:21   ` [Intel-gfx] " Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21 ` [PATCH v12 03/12] swiotlb: Set dev->dma_io_tlb_mem to the swiotlb pool used Claire Chang
2021-06-16  6:21   ` [Intel-gfx] " Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21 ` [PATCH v12 04/12] swiotlb: Update is_swiotlb_buffer to add a struct device argument Claire Chang
2021-06-16  6:21   ` [Intel-gfx] " Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21 ` [PATCH v12 05/12] swiotlb: Update is_swiotlb_active " Claire Chang
2021-06-16  6:21   ` [Intel-gfx] " Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21 ` [PATCH v12 06/12] swiotlb: Use is_swiotlb_force_bounce for swiotlb data bouncing Claire Chang
2021-06-16  6:21   ` [Intel-gfx] " Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  7:39   ` Christoph Hellwig
2021-06-16  7:39     ` [Intel-gfx] " Christoph Hellwig
2021-06-16  7:39     ` Christoph Hellwig
2021-06-16  7:39     ` Christoph Hellwig
2021-06-17  0:47   ` Stefano Stabellini
2021-06-17  0:47     ` Stefano Stabellini
2021-06-17  0:47     ` [Intel-gfx] " Stefano Stabellini
2021-06-17  0:47     ` Stefano Stabellini
2021-06-17  0:47     ` Stefano Stabellini
2021-06-17  0:47     ` Stefano Stabellini
2021-06-16  6:21 ` [PATCH v12 07/12] swiotlb: Move alloc_size to swiotlb_find_slots Claire Chang
2021-06-16  6:21   ` [Intel-gfx] " Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21 ` Claire Chang [this message]
2021-06-16  6:21   ` [Intel-gfx] [PATCH v12 08/12] swiotlb: Refactor swiotlb_tbl_unmap_single Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21 ` [PATCH v12 09/12] swiotlb: Add restricted DMA alloc/free support Claire Chang
2021-06-16  6:21   ` [Intel-gfx] " Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  7:39   ` Christoph Hellwig
2021-06-16  7:39     ` [Intel-gfx] " Christoph Hellwig
2021-06-16  7:39     ` Christoph Hellwig
2021-06-16  7:39     ` Christoph Hellwig
2021-06-16  6:21 ` [PATCH v12 10/12] swiotlb: Add restricted DMA pool initialization Claire Chang
2021-06-16  6:21   ` [Intel-gfx] " Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21 ` [PATCH v12 11/12] dt-bindings: of: Add restricted DMA pool Claire Chang
2021-06-16  6:21   ` [Intel-gfx] " Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-17  0:09   ` Stefano Stabellini
2021-06-17  0:09     ` Stefano Stabellini
2021-06-17  0:09     ` [Intel-gfx] " Stefano Stabellini
2021-06-17  0:09     ` Stefano Stabellini
2021-06-17  0:09     ` Stefano Stabellini
2021-06-17  0:09     ` Stefano Stabellini
2021-06-16  6:21 ` [PATCH v12 12/12] of: Add plumbing for " Claire Chang
2021-06-16  6:21   ` [Intel-gfx] " Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  6:21   ` Claire Chang
2021-06-16  7:35 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for Restricted DMA Patchwork
2021-06-16 12:08 ` [PATCH v12 00/12] " Will Deacon
2021-06-16 12:08   ` [Intel-gfx] " Will Deacon
2021-06-16 12:08   ` Will Deacon
2021-06-16 12:08   ` Will Deacon
2021-06-16 12:08   ` Will Deacon
2021-06-17  6:40   ` Claire Chang
2021-06-17  6:40     ` Claire Chang
2021-06-17  6:40     ` [Intel-gfx] " Claire Chang
2021-06-17  6:40     ` Claire Chang
2021-06-17  6:40     ` Claire Chang
2021-06-17  6:40     ` Claire Chang

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