Merge tag 'i3c/for-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux

Pull i3c updates from Alexandre Belloni:
 "New driver:
   - Analog Devices I3C Controller

  Subsystem:
   - fix big-endian FIFO transfers
   - fix default I2C adapter timeout value

  Drivers:
   - dw: shutdown support
   - mipi-i3c-hci: Intel Wildcat Lake-U support, IOMMU support
   - renesas: RZ/V2H(P) and RZ/V2N support"

* tag 'i3c/for-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (22 commits)
  i3c: fix big-endian FIFO transfers
  i3c: master: adi: fix number of bytes written to fifo
  i3c: Remove superfluous FIXME
  i3c: master: adi: fix header location
  i3c: dw: Add shutdown support to dw_i3c_master driver
  i3c: renesas: Simplify return statement in 'renesas_i3c_daa'
  dt-bindings: i3c: renesas,i3c: Add RZ/V2H(P) and RZ/V2N support
  i3c: master: svc: Recycle unused IBI slot
  i3c: master: svc: Use manual response for IBI events
  i3c: master: Add driver for Analog Devices I3C Controller IP
  dt-bindings: i3c: Add adi-i3c-master
  i3c: Fix default I2C adapter timeout value
  i3c: mipi-i3c-hci: Convert remaining DBG() prints to dev_dbg()
  i3c: mipi-i3c-hci: Remove function enter DBG() printouts
  i3c: mipi-i3c-hci: Uniform ring number printouts
  i3c: mipi-i3c-hci: Remove nonexistent ring interrupt
  i3c: mipi-i3c-hci: Change interrupt status prints to dev_dbg()
  i3c: mipi-i3c-hci: Use own DMA bounce buffer management for I2C transfers
  i3c: mipi-i3c-hci: Use physical device pointer with DMA API
  i3c: mipi-i3c-hci: Use core helpers for DMA mapping and bounce buffering
  ...

1 files changed, 26 insertions, 0 deletions

diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h
index 043f5c7ff398..c52a82dd79a6 100644
--- a/include/linux/i3c/master.h
+++ b/include/linux/i3c/master.h
@@ -558,6 +558,26 @@ struct i3c_master_controller {
 #define i3c_bus_for_each_i3cdev(bus, dev)				\
 	list_for_each_entry(dev, &(bus)->devs.i3c, common.node)
 
+/**
+ * struct i3c_dma - DMA transfer and mapping descriptor
+ * @dev: device object of a device doing DMA
+ * @buf: destination/source buffer for DMA
+ * @len: length of transfer
+ * @map_len: length of DMA mapping
+ * @addr: mapped DMA address for a Host Controller Driver
+ * @dir: DMA direction
+ * @bounce_buf: an allocated bounce buffer if transfer needs it or NULL
+ */
+struct i3c_dma {
+	struct device *dev;
+	void *buf;
+	size_t len;
+	size_t map_len;
+	dma_addr_t addr;
+	enum dma_data_direction dir;
+	void *bounce_buf;
+};
+
 int i3c_master_do_i2c_xfers(struct i3c_master_controller *master,
 			    const struct i2c_msg *xfers,
 			    int nxfers);
@@ -575,6 +595,12 @@ int i3c_master_get_free_addr(struct i3c_master_controller *master,
 int i3c_master_add_i3c_dev_locked(struct i3c_master_controller *master,
 				  u8 addr);
 int i3c_master_do_daa(struct i3c_master_controller *master);
+struct i3c_dma *i3c_master_dma_map_single(struct device *dev, void *ptr,
+					  size_t len, bool force_bounce,
+					  enum dma_data_direction dir);
+void i3c_master_dma_unmap_single(struct i3c_dma *dma_xfer);
+DEFINE_FREE(i3c_master_dma_unmap_single, void *,
+	    if (_T) i3c_master_dma_unmap_single(_T))
 
 int i3c_master_set_info(struct i3c_master_controller *master,
 			const struct i3c_device_info *info);