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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 v9 11/14] swiotlb: Add restricted DMA alloc/free support.
Date: Fri, 11 Jun 2021 23:26:56 +0800	[thread overview]
Message-ID: <20210611152659.2142983-12-tientzu@chromium.org> (raw)
In-Reply-To: <20210611152659.2142983-1-tientzu@chromium.org>

Add the functions, swiotlb_{alloc,free} to support the memory allocation
from restricted DMA pool.

Signed-off-by: Claire Chang <tientzu@chromium.org>
---
 include/linux/swiotlb.h | 15 +++++++++++++++
 kernel/dma/swiotlb.c    | 35 +++++++++++++++++++++++++++++++++--
 2 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 8200c100fe10..d3374497a4f8 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -162,4 +162,19 @@ static inline void swiotlb_adjust_size(unsigned long size)
 extern void swiotlb_print_info(void);
 extern void swiotlb_set_max_segment(unsigned int);
 
+#ifdef CONFIG_DMA_RESTRICTED_POOL
+struct page *swiotlb_alloc(struct device *dev, size_t size);
+bool swiotlb_free(struct device *dev, struct page *page, size_t size);
+#else
+static inline struct page *swiotlb_alloc(struct device *dev, size_t size)
+{
+	return NULL;
+}
+static inline bool swiotlb_free(struct device *dev, struct page *page,
+				size_t size)
+{
+	return false;
+}
+#endif /* CONFIG_DMA_RESTRICTED_POOL */
+
 #endif /* __LINUX_SWIOTLB_H */
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index a6562573f090..0a19858da5b8 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -461,8 +461,9 @@ static int find_slots(struct device *dev, phys_addr_t orig_addr,
 
 	index = wrap = wrap_index(mem, ALIGN(mem->index, stride));
 	do {
-		if ((slot_addr(tbl_dma_addr, index) & iotlb_align_mask) !=
-		    (orig_addr & iotlb_align_mask)) {
+		if (orig_addr &&
+		    (slot_addr(tbl_dma_addr, index) & iotlb_align_mask) !=
+			    (orig_addr & iotlb_align_mask)) {
 			index = wrap_index(mem, index + 1);
 			continue;
 		}
@@ -702,6 +703,36 @@ late_initcall(swiotlb_create_default_debugfs);
 #endif
 
 #ifdef CONFIG_DMA_RESTRICTED_POOL
+struct page *swiotlb_alloc(struct device *dev, size_t size)
+{
+	struct io_tlb_mem *mem = dev->dma_io_tlb_mem;
+	phys_addr_t tlb_addr;
+	int index;
+
+	if (!mem)
+		return NULL;
+
+	index = find_slots(dev, 0, size);
+	if (index == -1)
+		return NULL;
+
+	tlb_addr = slot_addr(mem->start, index);
+
+	return pfn_to_page(PFN_DOWN(tlb_addr));
+}
+
+bool swiotlb_free(struct device *dev, struct page *page, size_t size)
+{
+	phys_addr_t tlb_addr = page_to_phys(page);
+
+	if (!is_swiotlb_buffer(dev, tlb_addr))
+		return false;
+
+	release_slots(dev, tlb_addr);
+
+	return true;
+}
+
 static int rmem_swiotlb_device_init(struct reserved_mem *rmem,
 				    struct device *dev)
 {
-- 
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 v9 11/14] swiotlb: Add restricted DMA alloc/free support.
Date: Fri, 11 Jun 2021 23:26:56 +0800	[thread overview]
Message-ID: <20210611152659.2142983-12-tientzu@chromium.org> (raw)
In-Reply-To: <20210611152659.2142983-1-tientzu@chromium.org>

Add the functions, swiotlb_{alloc,free} to support the memory allocation
from restricted DMA pool.

Signed-off-by: Claire Chang <tientzu@chromium.org>
---
 include/linux/swiotlb.h | 15 +++++++++++++++
 kernel/dma/swiotlb.c    | 35 +++++++++++++++++++++++++++++++++--
 2 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 8200c100fe10..d3374497a4f8 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -162,4 +162,19 @@ static inline void swiotlb_adjust_size(unsigned long size)
 extern void swiotlb_print_info(void);
 extern void swiotlb_set_max_segment(unsigned int);
 
+#ifdef CONFIG_DMA_RESTRICTED_POOL
+struct page *swiotlb_alloc(struct device *dev, size_t size);
+bool swiotlb_free(struct device *dev, struct page *page, size_t size);
+#else
+static inline struct page *swiotlb_alloc(struct device *dev, size_t size)
+{
+	return NULL;
+}
+static inline bool swiotlb_free(struct device *dev, struct page *page,
+				size_t size)
+{
+	return false;
+}
+#endif /* CONFIG_DMA_RESTRICTED_POOL */
+
 #endif /* __LINUX_SWIOTLB_H */
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index a6562573f090..0a19858da5b8 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -461,8 +461,9 @@ static int find_slots(struct device *dev, phys_addr_t orig_addr,
 
 	index = wrap = wrap_index(mem, ALIGN(mem->index, stride));
 	do {
-		if ((slot_addr(tbl_dma_addr, index) & iotlb_align_mask) !=
-		    (orig_addr & iotlb_align_mask)) {
+		if (orig_addr &&
+		    (slot_addr(tbl_dma_addr, index) & iotlb_align_mask) !=
+			    (orig_addr & iotlb_align_mask)) {
 			index = wrap_index(mem, index + 1);
 			continue;
 		}
@@ -702,6 +703,36 @@ late_initcall(swiotlb_create_default_debugfs);
 #endif
 
 #ifdef CONFIG_DMA_RESTRICTED_POOL
+struct page *swiotlb_alloc(struct device *dev, size_t size)
+{
+	struct io_tlb_mem *mem = dev->dma_io_tlb_mem;
+	phys_addr_t tlb_addr;
+	int index;
+
+	if (!mem)
+		return NULL;
+
+	index = find_slots(dev, 0, size);
+	if (index == -1)
+		return NULL;
+
+	tlb_addr = slot_addr(mem->start, index);
+
+	return pfn_to_page(PFN_DOWN(tlb_addr));
+}
+
+bool swiotlb_free(struct device *dev, struct page *page, size_t size)
+{
+	phys_addr_t tlb_addr = page_to_phys(page);
+
+	if (!is_swiotlb_buffer(dev, tlb_addr))
+		return false;
+
+	release_slots(dev, tlb_addr);
+
+	return true;
+}
+
 static int rmem_swiotlb_device_init(struct reserved_mem *rmem,
 				    struct device *dev)
 {
-- 
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 v9 11/14] swiotlb: Add restricted DMA alloc/free support.
Date: Fri, 11 Jun 2021 23:26:56 +0800	[thread overview]
Message-ID: <20210611152659.2142983-12-tientzu@chromium.org> (raw)
In-Reply-To: <20210611152659.2142983-1-tientzu@chromium.org>

Add the functions, swiotlb_{alloc,free} to support the memory allocation
from restricted DMA pool.

Signed-off-by: Claire Chang <tientzu@chromium.org>
---
 include/linux/swiotlb.h | 15 +++++++++++++++
 kernel/dma/swiotlb.c    | 35 +++++++++++++++++++++++++++++++++--
 2 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 8200c100fe10..d3374497a4f8 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -162,4 +162,19 @@ static inline void swiotlb_adjust_size(unsigned long size)
 extern void swiotlb_print_info(void);
 extern void swiotlb_set_max_segment(unsigned int);
 
+#ifdef CONFIG_DMA_RESTRICTED_POOL
+struct page *swiotlb_alloc(struct device *dev, size_t size);
+bool swiotlb_free(struct device *dev, struct page *page, size_t size);
+#else
+static inline struct page *swiotlb_alloc(struct device *dev, size_t size)
+{
+	return NULL;
+}
+static inline bool swiotlb_free(struct device *dev, struct page *page,
+				size_t size)
+{
+	return false;
+}
+#endif /* CONFIG_DMA_RESTRICTED_POOL */
+
 #endif /* __LINUX_SWIOTLB_H */
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index a6562573f090..0a19858da5b8 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -461,8 +461,9 @@ static int find_slots(struct device *dev, phys_addr_t orig_addr,
 
 	index = wrap = wrap_index(mem, ALIGN(mem->index, stride));
 	do {
-		if ((slot_addr(tbl_dma_addr, index) & iotlb_align_mask) !=
-		    (orig_addr & iotlb_align_mask)) {
+		if (orig_addr &&
+		    (slot_addr(tbl_dma_addr, index) & iotlb_align_mask) !=
+			    (orig_addr & iotlb_align_mask)) {
 			index = wrap_index(mem, index + 1);
 			continue;
 		}
@@ -702,6 +703,36 @@ late_initcall(swiotlb_create_default_debugfs);
 #endif
 
 #ifdef CONFIG_DMA_RESTRICTED_POOL
+struct page *swiotlb_alloc(struct device *dev, size_t size)
+{
+	struct io_tlb_mem *mem = dev->dma_io_tlb_mem;
+	phys_addr_t tlb_addr;
+	int index;
+
+	if (!mem)
+		return NULL;
+
+	index = find_slots(dev, 0, size);
+	if (index == -1)
+		return NULL;
+
+	tlb_addr = slot_addr(mem->start, index);
+
+	return pfn_to_page(PFN_DOWN(tlb_addr));
+}
+
+bool swiotlb_free(struct device *dev, struct page *page, size_t size)
+{
+	phys_addr_t tlb_addr = page_to_phys(page);
+
+	if (!is_swiotlb_buffer(dev, tlb_addr))
+		return false;
+
+	release_slots(dev, tlb_addr);
+
+	return true;
+}
+
 static int rmem_swiotlb_device_init(struct reserved_mem *rmem,
 				    struct device *dev)
 {
-- 
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 v9 11/14] swiotlb: Add restricted DMA alloc/free support.
Date: Fri, 11 Jun 2021 23:26:56 +0800	[thread overview]
Message-ID: <20210611152659.2142983-12-tientzu@chromium.org> (raw)
In-Reply-To: <20210611152659.2142983-1-tientzu@chromium.org>

Add the functions, swiotlb_{alloc,free} to support the memory allocation
from restricted DMA pool.

Signed-off-by: Claire Chang <tientzu@chromium.org>
---
 include/linux/swiotlb.h | 15 +++++++++++++++
 kernel/dma/swiotlb.c    | 35 +++++++++++++++++++++++++++++++++--
 2 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 8200c100fe10..d3374497a4f8 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -162,4 +162,19 @@ static inline void swiotlb_adjust_size(unsigned long size)
 extern void swiotlb_print_info(void);
 extern void swiotlb_set_max_segment(unsigned int);
 
+#ifdef CONFIG_DMA_RESTRICTED_POOL
+struct page *swiotlb_alloc(struct device *dev, size_t size);
+bool swiotlb_free(struct device *dev, struct page *page, size_t size);
+#else
+static inline struct page *swiotlb_alloc(struct device *dev, size_t size)
+{
+	return NULL;
+}
+static inline bool swiotlb_free(struct device *dev, struct page *page,
+				size_t size)
+{
+	return false;
+}
+#endif /* CONFIG_DMA_RESTRICTED_POOL */
+
 #endif /* __LINUX_SWIOTLB_H */
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index a6562573f090..0a19858da5b8 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -461,8 +461,9 @@ static int find_slots(struct device *dev, phys_addr_t orig_addr,
 
 	index = wrap = wrap_index(mem, ALIGN(mem->index, stride));
 	do {
-		if ((slot_addr(tbl_dma_addr, index) & iotlb_align_mask) !=
-		    (orig_addr & iotlb_align_mask)) {
+		if (orig_addr &&
+		    (slot_addr(tbl_dma_addr, index) & iotlb_align_mask) !=
+			    (orig_addr & iotlb_align_mask)) {
 			index = wrap_index(mem, index + 1);
 			continue;
 		}
@@ -702,6 +703,36 @@ late_initcall(swiotlb_create_default_debugfs);
 #endif
 
 #ifdef CONFIG_DMA_RESTRICTED_POOL
+struct page *swiotlb_alloc(struct device *dev, size_t size)
+{
+	struct io_tlb_mem *mem = dev->dma_io_tlb_mem;
+	phys_addr_t tlb_addr;
+	int index;
+
+	if (!mem)
+		return NULL;
+
+	index = find_slots(dev, 0, size);
+	if (index == -1)
+		return NULL;
+
+	tlb_addr = slot_addr(mem->start, index);
+
+	return pfn_to_page(PFN_DOWN(tlb_addr));
+}
+
+bool swiotlb_free(struct device *dev, struct page *page, size_t size)
+{
+	phys_addr_t tlb_addr = page_to_phys(page);
+
+	if (!is_swiotlb_buffer(dev, tlb_addr))
+		return false;
+
+	release_slots(dev, tlb_addr);
+
+	return true;
+}
+
 static int rmem_swiotlb_device_init(struct reserved_mem *rmem,
 				    struct device *dev)
 {
-- 
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 v9 11/14] swiotlb: Add restricted DMA alloc/free support.
Date: Fri, 11 Jun 2021 23:26:56 +0800	[thread overview]
Message-ID: <20210611152659.2142983-12-tientzu@chromium.org> (raw)
In-Reply-To: <20210611152659.2142983-1-tientzu@chromium.org>

Add the functions, swiotlb_{alloc,free} to support the memory allocation
from restricted DMA pool.

Signed-off-by: Claire Chang <tientzu@chromium.org>
---
 include/linux/swiotlb.h | 15 +++++++++++++++
 kernel/dma/swiotlb.c    | 35 +++++++++++++++++++++++++++++++++--
 2 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 8200c100fe10..d3374497a4f8 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -162,4 +162,19 @@ static inline void swiotlb_adjust_size(unsigned long size)
 extern void swiotlb_print_info(void);
 extern void swiotlb_set_max_segment(unsigned int);
 
+#ifdef CONFIG_DMA_RESTRICTED_POOL
+struct page *swiotlb_alloc(struct device *dev, size_t size);
+bool swiotlb_free(struct device *dev, struct page *page, size_t size);
+#else
+static inline struct page *swiotlb_alloc(struct device *dev, size_t size)
+{
+	return NULL;
+}
+static inline bool swiotlb_free(struct device *dev, struct page *page,
+				size_t size)
+{
+	return false;
+}
+#endif /* CONFIG_DMA_RESTRICTED_POOL */
+
 #endif /* __LINUX_SWIOTLB_H */
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index a6562573f090..0a19858da5b8 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -461,8 +461,9 @@ static int find_slots(struct device *dev, phys_addr_t orig_addr,
 
 	index = wrap = wrap_index(mem, ALIGN(mem->index, stride));
 	do {
-		if ((slot_addr(tbl_dma_addr, index) & iotlb_align_mask) !=
-		    (orig_addr & iotlb_align_mask)) {
+		if (orig_addr &&
+		    (slot_addr(tbl_dma_addr, index) & iotlb_align_mask) !=
+			    (orig_addr & iotlb_align_mask)) {
 			index = wrap_index(mem, index + 1);
 			continue;
 		}
@@ -702,6 +703,36 @@ late_initcall(swiotlb_create_default_debugfs);
 #endif
 
 #ifdef CONFIG_DMA_RESTRICTED_POOL
+struct page *swiotlb_alloc(struct device *dev, size_t size)
+{
+	struct io_tlb_mem *mem = dev->dma_io_tlb_mem;
+	phys_addr_t tlb_addr;
+	int index;
+
+	if (!mem)
+		return NULL;
+
+	index = find_slots(dev, 0, size);
+	if (index == -1)
+		return NULL;
+
+	tlb_addr = slot_addr(mem->start, index);
+
+	return pfn_to_page(PFN_DOWN(tlb_addr));
+}
+
+bool swiotlb_free(struct device *dev, struct page *page, size_t size)
+{
+	phys_addr_t tlb_addr = page_to_phys(page);
+
+	if (!is_swiotlb_buffer(dev, tlb_addr))
+		return false;
+
+	release_slots(dev, tlb_addr);
+
+	return true;
+}
+
 static int rmem_swiotlb_device_init(struct reserved_mem *rmem,
 				    struct device *dev)
 {
-- 
2.32.0.272.g935e593368-goog

_______________________________________________
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Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

  parent reply	other threads:[~2021-06-11 15:28 UTC|newest]

Thread overview: 144+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-11 15:26 [PATCH v9 00/14] Restricted DMA Claire Chang
2021-06-11 15:26 ` [Intel-gfx] " Claire Chang
2021-06-11 15:26 ` Claire Chang
2021-06-11 15:26 ` Claire Chang
2021-06-11 15:26 ` Claire Chang
2021-06-11 15:26 ` [PATCH v9 01/14] swiotlb: Refactor swiotlb init functions Claire Chang
2021-06-11 15:26   ` [Intel-gfx] " Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-14  6:16   ` Christoph Hellwig
2021-06-14  6:16     ` [Intel-gfx] " Christoph Hellwig
2021-06-14  6:16     ` Christoph Hellwig
2021-06-14  6:16     ` Christoph Hellwig
2021-06-15  4:06     ` Claire Chang
2021-06-15  4:06       ` Claire Chang
2021-06-15  4:06       ` [Intel-gfx] " Claire Chang
2021-06-15  4:06       ` Claire Chang
2021-06-15  4:06       ` Claire Chang
2021-06-15  4:06       ` Claire Chang
2021-06-11 15:26 ` [PATCH v9 02/14] swiotlb: Refactor swiotlb_create_debugfs Claire Chang
2021-06-11 15:26   ` [Intel-gfx] " Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-14  6:17   ` Christoph Hellwig
2021-06-14  6:17     ` [Intel-gfx] " Christoph Hellwig
2021-06-14  6:17     ` Christoph Hellwig
2021-06-14  6:17     ` Christoph Hellwig
2021-06-11 15:26 ` [PATCH v9 03/14] swiotlb: Set dev->dma_io_tlb_mem to the swiotlb pool used Claire Chang
2021-06-11 15:26   ` [Intel-gfx] " Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:33   ` Claire Chang
2021-06-11 15:33     ` Claire Chang
2021-06-11 15:33     ` [Intel-gfx] " Claire Chang
2021-06-11 15:33     ` Claire Chang
2021-06-11 15:33     ` Claire Chang
2021-06-11 15:33     ` Claire Chang
2021-06-14  6:20     ` Christoph Hellwig
2021-06-14  6:20       ` [Intel-gfx] " Christoph Hellwig
2021-06-14  6:20       ` Christoph Hellwig
2021-06-14  6:20       ` Christoph Hellwig
2021-06-11 15:26 ` [PATCH v9 04/14] swiotlb: Add restricted DMA pool initialization Claire Chang
2021-06-11 15:26   ` [Intel-gfx] " Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-14  6:21   ` Christoph Hellwig
2021-06-14  6:21     ` [Intel-gfx] " Christoph Hellwig
2021-06-14  6:21     ` Christoph Hellwig
2021-06-14  6:21     ` Christoph Hellwig
2021-06-11 15:26 ` [PATCH v9 05/14] swiotlb: Update is_swiotlb_buffer to add a struct device argument Claire Chang
2021-06-11 15:26   ` [Intel-gfx] " Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-14  6:21   ` Christoph Hellwig
2021-06-14  6:21     ` [Intel-gfx] " Christoph Hellwig
2021-06-14  6:21     ` Christoph Hellwig
2021-06-14  6:21     ` Christoph Hellwig
2021-06-11 15:26 ` [PATCH v9 06/14] swiotlb: Update is_swiotlb_active " Claire Chang
2021-06-11 15:26   ` [Intel-gfx] " Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:34   ` Claire Chang
2021-06-11 15:34     ` Claire Chang
2021-06-11 15:34     ` [Intel-gfx] " Claire Chang
2021-06-11 15:34     ` Claire Chang
2021-06-11 15:34     ` Claire Chang
2021-06-11 15:34     ` Claire Chang
2021-06-14  6:23   ` Christoph Hellwig
2021-06-14  6:23     ` [Intel-gfx] " Christoph Hellwig
2021-06-14  6:23     ` Christoph Hellwig
2021-06-14  6:23     ` Christoph Hellwig
2021-06-11 15:26 ` [PATCH v9 07/14] swiotlb: Bounce data from/to restricted DMA pool if available Claire Chang
2021-06-11 15:26   ` [Intel-gfx] " Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-14  6:25   ` Christoph Hellwig
2021-06-14  6:25     ` [Intel-gfx] " Christoph Hellwig
2021-06-14  6:25     ` Christoph Hellwig
2021-06-14  6:25     ` Christoph Hellwig
2021-06-11 15:26 ` [PATCH v9 08/14] swiotlb: Move alloc_size to find_slots Claire Chang
2021-06-11 15:26   ` [Intel-gfx] " Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-14  6:25   ` Christoph Hellwig
2021-06-14  6:25     ` [Intel-gfx] " Christoph Hellwig
2021-06-14  6:25     ` Christoph Hellwig
2021-06-14  6:25     ` Christoph Hellwig
2021-06-11 15:26 ` [PATCH v9 09/14] swiotlb: Refactor swiotlb_tbl_unmap_single Claire Chang
2021-06-11 15:26   ` [Intel-gfx] " Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-14  6:26   ` Christoph Hellwig
2021-06-14  6:26     ` [Intel-gfx] " Christoph Hellwig
2021-06-14  6:26     ` Christoph Hellwig
2021-06-14  6:26     ` Christoph Hellwig
2021-06-11 15:26 ` [PATCH v9 10/14] dma-direct: Add a new wrapper __dma_direct_free_pages() Claire Chang
2021-06-11 15:26   ` [Intel-gfx] " Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26 ` Claire Chang [this message]
2021-06-11 15:26   ` [Intel-gfx] [PATCH v9 11/14] swiotlb: Add restricted DMA alloc/free support Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-14  6:28   ` Christoph Hellwig
2021-06-14  6:28     ` [Intel-gfx] " Christoph Hellwig
2021-06-14  6:28     ` Christoph Hellwig
2021-06-14  6:28     ` Christoph Hellwig
2021-06-14  6:28     ` Christoph Hellwig
2021-06-14  6:28       ` [Intel-gfx] " Christoph Hellwig
2021-06-14  6:28       ` Christoph Hellwig
2021-06-14  6:28       ` Christoph Hellwig
2021-06-11 15:26 ` [PATCH v9 12/14] dma-direct: Allocate memory from restricted DMA pool if available Claire Chang
2021-06-11 15:26   ` [Intel-gfx] " Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26 ` [PATCH v9 13/14] dt-bindings: of: Add restricted DMA pool Claire Chang
2021-06-11 15:26   ` [Intel-gfx] " Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26 ` [PATCH v9 14/14] of: Add plumbing for " Claire Chang
2021-06-11 15:26   ` [Intel-gfx] " Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 15:26   ` Claire Chang
2021-06-11 17:37 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for Restricted DMA Patchwork
2021-06-15 13:30 ` [PATCH v9 00/14] " Claire Chang
2021-06-15 13:30   ` Claire Chang
2021-06-15 13:30   ` [Intel-gfx] " Claire Chang
2021-06-15 13:30   ` Claire Chang
2021-06-15 13:30   ` Claire Chang
2021-06-15 13:30   ` Claire Chang

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