Merging upstream version 6.9.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 66 insertions, 3 deletions

diff --git a/drivers/vdpa/vdpa_user/iova_domain.c b/drivers/vdpa/vdpa_user/iova_domain.c
index 5e4a77b9b..791d38d62 100644
--- a/drivers/vdpa/vdpa_user/iova_domain.c
+++ b/drivers/vdpa/vdpa_user/iova_domain.c
@@ -373,6 +373,26 @@ static void vduse_domain_free_iova(struct iova_domain *iovad,
 	free_iova_fast(iovad, iova >> shift, iova_len);
 }
 
+void vduse_domain_sync_single_for_device(struct vduse_iova_domain *domain,
+				      dma_addr_t dma_addr, size_t size,
+				      enum dma_data_direction dir)
+{
+	read_lock(&domain->bounce_lock);
+	if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL)
+		vduse_domain_bounce(domain, dma_addr, size, DMA_TO_DEVICE);
+	read_unlock(&domain->bounce_lock);
+}
+
+void vduse_domain_sync_single_for_cpu(struct vduse_iova_domain *domain,
+				      dma_addr_t dma_addr, size_t size,
+				      enum dma_data_direction dir)
+{
+	read_lock(&domain->bounce_lock);
+	if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)
+		vduse_domain_bounce(domain, dma_addr, size, DMA_FROM_DEVICE);
+	read_unlock(&domain->bounce_lock);
+}
+
 dma_addr_t vduse_domain_map_page(struct vduse_iova_domain *domain,
 				 struct page *page, unsigned long offset,
 				 size_t size, enum dma_data_direction dir,
@@ -393,7 +413,8 @@ dma_addr_t vduse_domain_map_page(struct vduse_iova_domain *domain,
 	if (vduse_domain_map_bounce_page(domain, (u64)iova, (u64)size, pa))
 		goto err_unlock;
 
-	if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL)
+	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
+	    (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL))
 		vduse_domain_bounce(domain, iova, size, DMA_TO_DEVICE);
 
 	read_unlock(&domain->bounce_lock);
@@ -411,9 +432,9 @@ void vduse_domain_unmap_page(struct vduse_iova_domain *domain,
 			     enum dma_data_direction dir, unsigned long attrs)
 {
 	struct iova_domain *iovad = &domain->stream_iovad;
-
 	read_lock(&domain->bounce_lock);
-	if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)
+	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
+	    (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
 		vduse_domain_bounce(domain, dma_addr, size, DMA_FROM_DEVICE);
 
 	vduse_domain_unmap_bounce_page(domain, (u64)dma_addr, (u64)size);
diff --git a/drivers/vdpa/vdpa_user/iova_domain.h b/drivers/vdpa/vdpa_user/iova_domain.h
index 173e979b8..f92f22a72 100644
--- a/drivers/vdpa/vdpa_user/iova_domain.h
+++ b/drivers/vdpa/vdpa_user/iova_domain.h
@@ -44,6 +44,14 @@ int vduse_domain_set_map(struct vduse_iova_domain *domain,
 void vduse_domain_clear_map(struct vduse_iova_domain *domain,
 			    struct vhost_iotlb *iotlb);
 
+void vduse_domain_sync_single_for_device(struct vduse_iova_domain *domain,
+				      dma_addr_t dma_addr, size_t size,
+				      enum dma_data_direction dir);
+
+void vduse_domain_sync_single_for_cpu(struct vduse_iova_domain *domain,
+				      dma_addr_t dma_addr, size_t size,
+				      enum dma_data_direction dir);
+
 dma_addr_t vduse_domain_map_page(struct vduse_iova_domain *domain,
 				 struct page *page, unsigned long offset,
 				 size_t size, enum dma_data_direction dir,
diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index 1d24da79c..73c89701f 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -541,6 +541,17 @@ static void vduse_vdpa_set_vq_num(struct vdpa_device *vdpa, u16 idx, u32 num)
 	vq->num = num;
 }
 
+static u16 vduse_vdpa_get_vq_size(struct vdpa_device *vdpa, u16 idx)
+{
+	struct vduse_dev *dev = vdpa_to_vduse(vdpa);
+	struct vduse_virtqueue *vq = dev->vqs[idx];
+
+	if (vq->num)
+		return vq->num;
+	else
+		return vq->num_max;
+}
+
 static void vduse_vdpa_set_vq_ready(struct vdpa_device *vdpa,
 					u16 idx, bool ready)
 {
@@ -773,6 +784,7 @@ static const struct vdpa_config_ops vduse_vdpa_config_ops = {
 	.kick_vq		= vduse_vdpa_kick_vq,
 	.set_vq_cb		= vduse_vdpa_set_vq_cb,
 	.set_vq_num             = vduse_vdpa_set_vq_num,
+	.get_vq_size		= vduse_vdpa_get_vq_size,
 	.set_vq_ready		= vduse_vdpa_set_vq_ready,
 	.get_vq_ready		= vduse_vdpa_get_vq_ready,
 	.set_vq_state		= vduse_vdpa_set_vq_state,
@@ -798,6 +810,26 @@ static const struct vdpa_config_ops vduse_vdpa_config_ops = {
 	.free			= vduse_vdpa_free,
 };
 
+static void vduse_dev_sync_single_for_device(struct device *dev,
+					     dma_addr_t dma_addr, size_t size,
+					     enum dma_data_direction dir)
+{
+	struct vduse_dev *vdev = dev_to_vduse(dev);
+	struct vduse_iova_domain *domain = vdev->domain;
+
+	vduse_domain_sync_single_for_device(domain, dma_addr, size, dir);
+}
+
+static void vduse_dev_sync_single_for_cpu(struct device *dev,
+					     dma_addr_t dma_addr, size_t size,
+					     enum dma_data_direction dir)
+{
+	struct vduse_dev *vdev = dev_to_vduse(dev);
+	struct vduse_iova_domain *domain = vdev->domain;
+
+	vduse_domain_sync_single_for_cpu(domain, dma_addr, size, dir);
+}
+
 static dma_addr_t vduse_dev_map_page(struct device *dev, struct page *page,
 				     unsigned long offset, size_t size,
 				     enum dma_data_direction dir,
@@ -858,6 +890,8 @@ static size_t vduse_dev_max_mapping_size(struct device *dev)
 }
 
 static const struct dma_map_ops vduse_dev_dma_ops = {
+	.sync_single_for_device = vduse_dev_sync_single_for_device,
+	.sync_single_for_cpu = vduse_dev_sync_single_for_cpu,
 	.map_page = vduse_dev_map_page,
 	.unmap_page = vduse_dev_unmap_page,
 	.alloc = vduse_dev_alloc_coherent,