Merge tag 'dma-mapping-6.12-2024-09-19' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping updates from Christoph Hellwig:

 - support DMA zones for arm64 systems where memory starts at > 4GB
   (Baruch Siach, Catalin Marinas)

 - support direct calls into dma-iommu and thus obsolete dma_map_ops for
   many common configurations (Leon Romanovsky)

 - add DMA-API tracing (Sean Anderson)

 - remove the not very useful return value from various dma_set_* APIs
   (Christoph Hellwig)

 - misc cleanups and minor optimizations (Chen Y, Yosry Ahmed, Christoph
   Hellwig)

* tag 'dma-mapping-6.12-2024-09-19' of git://git.infradead.org/users/hch/dma-mapping:
  dma-mapping: reflow dma_supported
  dma-mapping: reliably inform about DMA support for IOMMU
  dma-mapping: add tracing for dma-mapping API calls
  dma-mapping: use IOMMU DMA calls for common alloc/free page calls
  dma-direct: optimize page freeing when it is not addressable
  dma-mapping: clearly mark DMA ops as an architecture feature
  vdpa_sim: don't select DMA_OPS
  arm64: mm: keep low RAM dma zone
  dma-mapping: don't return errors from dma_set_max_seg_size
  dma-mapping: don't return errors from dma_set_seg_boundary
  dma-mapping: don't return errors from dma_set_min_align_mask
  scsi: check that busses support the DMA API before setting dma parameters
  arm64: mm: fix DMA zone when dma-ranges is missing
  dma-mapping: direct calls for dma-iommu
  dma-mapping: call ->unmap_page and ->unmap_sg unconditionally
  arm64: support DMA zone above 4GB
  dma-mapping: replace zone_dma_bits by zone_dma_limit
  dma-mapping: use bit masking to check VM_DMA_COHERENT

1 files changed, 341 insertions, 0 deletions

diff --git a/include/trace/events/dma.h b/include/trace/events/dma.h
new file mode 100644
index 000000000000..f57f05331d73
--- /dev/null
+++ b/include/trace/events/dma.h
@@ -0,0 +1,341 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM dma
+
+#if !defined(_TRACE_DMA_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_DMA_H
+
+#include <linux/tracepoint.h>
+#include <linux/dma-direction.h>
+#include <linux/dma-mapping.h>
+#include <trace/events/mmflags.h>
+
+TRACE_DEFINE_ENUM(DMA_BIDIRECTIONAL);
+TRACE_DEFINE_ENUM(DMA_TO_DEVICE);
+TRACE_DEFINE_ENUM(DMA_FROM_DEVICE);
+TRACE_DEFINE_ENUM(DMA_NONE);
+
+#define decode_dma_data_direction(dir) \
+	__print_symbolic(dir, \
+		{ DMA_BIDIRECTIONAL, "BIDIRECTIONAL" }, \
+		{ DMA_TO_DEVICE, "TO_DEVICE" }, \
+		{ DMA_FROM_DEVICE, "FROM_DEVICE" }, \
+		{ DMA_NONE, "NONE" })
+
+#define decode_dma_attrs(attrs) \
+	__print_flags(attrs, "|", \
+		{ DMA_ATTR_WEAK_ORDERING, "WEAK_ORDERING" }, \
+		{ DMA_ATTR_WRITE_COMBINE, "WRITE_COMBINE" }, \
+		{ DMA_ATTR_NO_KERNEL_MAPPING, "NO_KERNEL_MAPPING" }, \
+		{ DMA_ATTR_SKIP_CPU_SYNC, "SKIP_CPU_SYNC" }, \
+		{ DMA_ATTR_FORCE_CONTIGUOUS, "FORCE_CONTIGUOUS" }, \
+		{ DMA_ATTR_ALLOC_SINGLE_PAGES, "ALLOC_SINGLE_PAGES" }, \
+		{ DMA_ATTR_NO_WARN, "NO_WARN" }, \
+		{ DMA_ATTR_PRIVILEGED, "PRIVILEGED" })
+
+DECLARE_EVENT_CLASS(dma_map,
+	TP_PROTO(struct device *dev, phys_addr_t phys_addr, dma_addr_t dma_addr,
+		 size_t size, enum dma_data_direction dir, unsigned long attrs),
+	TP_ARGS(dev, phys_addr, dma_addr, size, dir, attrs),
+
+	TP_STRUCT__entry(
+		__string(device, dev_name(dev))
+		__field(u64, phys_addr)
+		__field(u64, dma_addr)
+		__field(size_t, size)
+		__field(enum dma_data_direction, dir)
+		__field(unsigned long, attrs)
+	),
+
+	TP_fast_assign(
+		__assign_str(device);
+		__entry->phys_addr = phys_addr;
+		__entry->dma_addr = dma_addr;
+		__entry->size = size;
+		__entry->dir = dir;
+		__entry->attrs = attrs;
+	),
+
+	TP_printk("%s dir=%s dma_addr=%llx size=%zu phys_addr=%llx attrs=%s",
+		__get_str(device),
+		decode_dma_data_direction(__entry->dir),
+		__entry->dma_addr,
+		__entry->size,
+		__entry->phys_addr,
+		decode_dma_attrs(__entry->attrs))
+);
+
+DEFINE_EVENT(dma_map, dma_map_page,
+	TP_PROTO(struct device *dev, phys_addr_t phys_addr, dma_addr_t dma_addr,
+		 size_t size, enum dma_data_direction dir, unsigned long attrs),
+	TP_ARGS(dev, phys_addr, dma_addr, size, dir, attrs));
+
+DEFINE_EVENT(dma_map, dma_map_resource,
+	TP_PROTO(struct device *dev, phys_addr_t phys_addr, dma_addr_t dma_addr,
+		 size_t size, enum dma_data_direction dir, unsigned long attrs),
+	TP_ARGS(dev, phys_addr, dma_addr, size, dir, attrs));
+
+DECLARE_EVENT_CLASS(dma_unmap,
+	TP_PROTO(struct device *dev, dma_addr_t addr, size_t size,
+		 enum dma_data_direction dir, unsigned long attrs),
+	TP_ARGS(dev, addr, size, dir, attrs),
+
+	TP_STRUCT__entry(
+		__string(device, dev_name(dev))
+		__field(u64, addr)
+		__field(size_t, size)
+		__field(enum dma_data_direction, dir)
+		__field(unsigned long, attrs)
+	),
+
+	TP_fast_assign(
+		__assign_str(device);
+		__entry->addr = addr;
+		__entry->size = size;
+		__entry->dir = dir;
+		__entry->attrs = attrs;
+	),
+
+	TP_printk("%s dir=%s dma_addr=%llx size=%zu attrs=%s",
+		__get_str(device),
+		decode_dma_data_direction(__entry->dir),
+		__entry->addr,
+		__entry->size,
+		decode_dma_attrs(__entry->attrs))
+);
+
+DEFINE_EVENT(dma_unmap, dma_unmap_page,
+	TP_PROTO(struct device *dev, dma_addr_t addr, size_t size,
+		 enum dma_data_direction dir, unsigned long attrs),
+	TP_ARGS(dev, addr, size, dir, attrs));
+
+DEFINE_EVENT(dma_unmap, dma_unmap_resource,
+	TP_PROTO(struct device *dev, dma_addr_t addr, size_t size,
+		 enum dma_data_direction dir, unsigned long attrs),
+	TP_ARGS(dev, addr, size, dir, attrs));
+
+TRACE_EVENT(dma_alloc,
+	TP_PROTO(struct device *dev, void *virt_addr, dma_addr_t dma_addr,
+		 size_t size, gfp_t flags, unsigned long attrs),
+	TP_ARGS(dev, virt_addr, dma_addr, size, flags, attrs),
+
+	TP_STRUCT__entry(
+		__string(device, dev_name(dev))
+		__field(u64, phys_addr)
+		__field(u64, dma_addr)
+		__field(size_t, size)
+		__field(gfp_t, flags)
+		__field(unsigned long, attrs)
+	),
+
+	TP_fast_assign(
+		__assign_str(device);
+		__entry->phys_addr = virt_to_phys(virt_addr);
+		__entry->dma_addr = dma_addr;
+		__entry->size = size;
+		__entry->flags = flags;
+		__entry->attrs = attrs;
+	),
+
+	TP_printk("%s dma_addr=%llx size=%zu phys_addr=%llx flags=%s attrs=%s",
+		__get_str(device),
+		__entry->dma_addr,
+		__entry->size,
+		__entry->phys_addr,
+		show_gfp_flags(__entry->flags),
+		decode_dma_attrs(__entry->attrs))
+);
+
+TRACE_EVENT(dma_free,
+	TP_PROTO(struct device *dev, void *virt_addr, dma_addr_t dma_addr,
+		 size_t size, unsigned long attrs),
+	TP_ARGS(dev, virt_addr, dma_addr, size, attrs),
+
+	TP_STRUCT__entry(
+		__string(device, dev_name(dev))
+		__field(u64, phys_addr)
+		__field(u64, dma_addr)
+		__field(size_t, size)
+		__field(unsigned long, attrs)
+	),
+
+	TP_fast_assign(
+		__assign_str(device);
+		__entry->phys_addr = virt_to_phys(virt_addr);
+		__entry->dma_addr = dma_addr;
+		__entry->size = size;
+		__entry->attrs = attrs;
+	),
+
+	TP_printk("%s dma_addr=%llx size=%zu phys_addr=%llx attrs=%s",
+		__get_str(device),
+		__entry->dma_addr,
+		__entry->size,
+		__entry->phys_addr,
+		decode_dma_attrs(__entry->attrs))
+);
+
+TRACE_EVENT(dma_map_sg,
+	TP_PROTO(struct device *dev, struct scatterlist *sg, int nents,
+		 int ents, enum dma_data_direction dir, unsigned long attrs),
+	TP_ARGS(dev, sg, nents, ents, dir, attrs),
+
+	TP_STRUCT__entry(
+		__string(device, dev_name(dev))
+		__dynamic_array(u64, phys_addrs, nents)
+		__dynamic_array(u64, dma_addrs, ents)
+		__dynamic_array(unsigned int, lengths, ents)
+		__field(enum dma_data_direction, dir)
+		__field(unsigned long, attrs)
+	),
+
+	TP_fast_assign(
+		int i;
+
+		__assign_str(device);
+		for (i = 0; i < nents; i++)
+			((u64 *)__get_dynamic_array(phys_addrs))[i] =
+				sg_phys(sg + i);
+		for (i = 0; i < ents; i++) {
+			((u64 *)__get_dynamic_array(dma_addrs))[i] =
+				sg_dma_address(sg + i);
+			((unsigned int *)__get_dynamic_array(lengths))[i] =
+				sg_dma_len(sg + i);
+		}
+		__entry->dir = dir;
+		__entry->attrs = attrs;
+	),
+
+	TP_printk("%s dir=%s dma_addrs=%s sizes=%s phys_addrs=%s attrs=%s",
+		__get_str(device),
+		decode_dma_data_direction(__entry->dir),
+		__print_array(__get_dynamic_array(dma_addrs),
+			      __get_dynamic_array_len(dma_addrs) /
+				sizeof(u64), sizeof(u64)),
+		__print_array(__get_dynamic_array(lengths),
+			      __get_dynamic_array_len(lengths) /
+				sizeof(unsigned int), sizeof(unsigned int)),
+		__print_array(__get_dynamic_array(phys_addrs),
+			      __get_dynamic_array_len(phys_addrs) /
+				sizeof(u64), sizeof(u64)),
+		decode_dma_attrs(__entry->attrs))
+);
+
+TRACE_EVENT(dma_unmap_sg,
+	TP_PROTO(struct device *dev, struct scatterlist *sg, int nents,
+		 enum dma_data_direction dir, unsigned long attrs),
+	TP_ARGS(dev, sg, nents, dir, attrs),
+
+	TP_STRUCT__entry(
+		__string(device, dev_name(dev))
+		__dynamic_array(u64, addrs, nents)
+		__field(enum dma_data_direction, dir)
+		__field(unsigned long, attrs)
+	),
+
+	TP_fast_assign(
+		int i;
+
+		__assign_str(device);
+		for (i = 0; i < nents; i++)
+			((u64 *)__get_dynamic_array(addrs))[i] =
+				sg_phys(sg + i);
+		__entry->dir = dir;
+		__entry->attrs = attrs;
+	),
+
+	TP_printk("%s dir=%s phys_addrs=%s attrs=%s",
+		__get_str(device),
+		decode_dma_data_direction(__entry->dir),
+		__print_array(__get_dynamic_array(addrs),
+			      __get_dynamic_array_len(addrs) /
+				sizeof(u64), sizeof(u64)),
+		decode_dma_attrs(__entry->attrs))
+);
+
+DECLARE_EVENT_CLASS(dma_sync_single,
+	TP_PROTO(struct device *dev, dma_addr_t dma_addr, size_t size,
+		 enum dma_data_direction dir),
+	TP_ARGS(dev, dma_addr, size, dir),
+
+	TP_STRUCT__entry(
+		__string(device, dev_name(dev))
+		__field(u64, dma_addr)
+		__field(size_t, size)
+		__field(enum dma_data_direction, dir)
+	),
+
+	TP_fast_assign(
+		__assign_str(device);
+		__entry->dma_addr = dma_addr;
+		__entry->size = size;
+		__entry->dir = dir;
+	),
+
+	TP_printk("%s dir=%s dma_addr=%llx size=%zu",
+		__get_str(device),
+		decode_dma_data_direction(__entry->dir),
+		__entry->dma_addr,
+		__entry->size)
+);
+
+DEFINE_EVENT(dma_sync_single, dma_sync_single_for_cpu,
+	TP_PROTO(struct device *dev, dma_addr_t dma_addr, size_t size,
+		 enum dma_data_direction dir),
+	TP_ARGS(dev, dma_addr, size, dir));
+
+DEFINE_EVENT(dma_sync_single, dma_sync_single_for_device,
+	TP_PROTO(struct device *dev, dma_addr_t dma_addr, size_t size,
+		 enum dma_data_direction dir),
+	TP_ARGS(dev, dma_addr, size, dir));
+
+DECLARE_EVENT_CLASS(dma_sync_sg,
+	TP_PROTO(struct device *dev, struct scatterlist *sg, int nents,
+		 enum dma_data_direction dir),
+	TP_ARGS(dev, sg, nents, dir),
+
+	TP_STRUCT__entry(
+		__string(device, dev_name(dev))
+		__dynamic_array(u64, dma_addrs, nents)
+		__dynamic_array(unsigned int, lengths, nents)
+		__field(enum dma_data_direction, dir)
+	),
+
+	TP_fast_assign(
+		int i;
+
+		__assign_str(device);
+		for (i = 0; i < nents; i++) {
+			((u64 *)__get_dynamic_array(dma_addrs))[i] =
+				sg_dma_address(sg + i);
+			((unsigned int *)__get_dynamic_array(lengths))[i] =
+				sg_dma_len(sg + i);
+		}
+		__entry->dir = dir;
+	),
+
+	TP_printk("%s dir=%s dma_addrs=%s sizes=%s",
+		__get_str(device),
+		decode_dma_data_direction(__entry->dir),
+		__print_array(__get_dynamic_array(dma_addrs),
+			      __get_dynamic_array_len(dma_addrs) /
+				sizeof(u64), sizeof(u64)),
+		__print_array(__get_dynamic_array(lengths),
+			      __get_dynamic_array_len(lengths) /
+				sizeof(unsigned int), sizeof(unsigned int)))
+);
+
+DEFINE_EVENT(dma_sync_sg, dma_sync_sg_for_cpu,
+	TP_PROTO(struct device *dev, struct scatterlist *sg, int nents,
+		 enum dma_data_direction dir),
+	TP_ARGS(dev, sg, nents, dir));
+
+DEFINE_EVENT(dma_sync_sg, dma_sync_sg_for_device,
+	TP_PROTO(struct device *dev, struct scatterlist *sg, int nents,
+		 enum dma_data_direction dir),
+	TP_ARGS(dev, sg, nents, dir));
+
+#endif /*  _TRACE_DMA_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>