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authorAlexandre Bounine <alexandre.bounine@idt.com>2016-03-22 14:27:08 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-22 15:36:02 -0700
commite8de370188d098bb49483c287b44925957c3c9b6 (patch)
tree8f33f876d4b82ee63b8289b23ed05bebb3b25b84 /include
parent458bdf6e399d7d6f779b97a24645a7a38d1ae07b (diff)
downloadlinux-e8de370188d098bb49483c287b44925957c3c9b6.tar.bz2
rapidio: add mport char device driver
Add mport character device driver to provide user space interface to basic RapidIO subsystem operations. See included Documentation/rapidio/mport_cdev.txt for more details. [akpm@linux-foundation.org: fix printk warning on i386] [dan.carpenter@oracle.com: mport_cdev: fix some error codes] Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Tested-by: Barry Wood <barry.wood@idt.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com> Cc: Barry Wood <barry.wood@idt.com> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/rio_mport_cdev.h271
-rw-r--r--include/uapi/linux/Kbuild1
2 files changed, 272 insertions, 0 deletions
diff --git a/include/linux/rio_mport_cdev.h b/include/linux/rio_mport_cdev.h
new file mode 100644
index 000000000000..b65d19df76d2
--- /dev/null
+++ b/include/linux/rio_mport_cdev.h
@@ -0,0 +1,271 @@
+/*
+ * Copyright (c) 2015-2016, Integrated Device Technology Inc.
+ * Copyright (c) 2015, Prodrive Technologies
+ * Copyright (c) 2015, Texas Instruments Incorporated
+ * Copyright (c) 2015, RapidIO Trade Association
+ * All rights reserved.
+ *
+ * This software is available to you under a choice of one of two licenses.
+ * You may choose to be licensed under the terms of the GNU General Public
+ * License(GPL) Version 2, or the BSD-3 Clause license below:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ * may be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RIO_MPORT_CDEV_H_
+#define _RIO_MPORT_CDEV_H_
+
+#ifndef __user
+#define __user
+#endif
+
+struct rio_mport_maint_io {
+ uint32_t rioid; /* destID of remote device */
+ uint32_t hopcount; /* hopcount to remote device */
+ uint32_t offset; /* offset in register space */
+ size_t length; /* length in bytes */
+ void __user *buffer; /* data buffer */
+};
+
+/*
+ * Definitions for RapidIO data transfers:
+ * - memory mapped (MAPPED)
+ * - packet generation from memory (TRANSFER)
+ */
+#define RIO_TRANSFER_MODE_MAPPED (1 << 0)
+#define RIO_TRANSFER_MODE_TRANSFER (1 << 1)
+#define RIO_CAP_DBL_SEND (1 << 2)
+#define RIO_CAP_DBL_RECV (1 << 3)
+#define RIO_CAP_PW_SEND (1 << 4)
+#define RIO_CAP_PW_RECV (1 << 5)
+#define RIO_CAP_MAP_OUTB (1 << 6)
+#define RIO_CAP_MAP_INB (1 << 7)
+
+struct rio_mport_properties {
+ uint16_t hdid;
+ uint8_t id; /* Physical port ID */
+ uint8_t index;
+ uint32_t flags;
+ uint32_t sys_size; /* Default addressing size */
+ uint8_t port_ok;
+ uint8_t link_speed;
+ uint8_t link_width;
+ uint32_t dma_max_sge;
+ uint32_t dma_max_size;
+ uint32_t dma_align;
+ uint32_t transfer_mode; /* Default transfer mode */
+ uint32_t cap_sys_size; /* Capable system sizes */
+ uint32_t cap_addr_size; /* Capable addressing sizes */
+ uint32_t cap_transfer_mode; /* Capable transfer modes */
+ uint32_t cap_mport; /* Mport capabilities */
+};
+
+/*
+ * Definitions for RapidIO events;
+ * - incoming port-writes
+ * - incoming doorbells
+ */
+#define RIO_DOORBELL (1 << 0)
+#define RIO_PORTWRITE (1 << 1)
+
+struct rio_doorbell {
+ uint32_t rioid;
+ uint16_t payload;
+};
+
+struct rio_doorbell_filter {
+ uint32_t rioid; /* 0xffffffff to match all ids */
+ uint16_t low;
+ uint16_t high;
+};
+
+
+struct rio_portwrite {
+ uint32_t payload[16];
+};
+
+struct rio_pw_filter {
+ uint32_t mask;
+ uint32_t low;
+ uint32_t high;
+};
+
+/* RapidIO base address for inbound requests set to value defined below
+ * indicates that no specific RIO-to-local address translation is requested
+ * and driver should use direct (one-to-one) address mapping.
+*/
+#define RIO_MAP_ANY_ADDR (uint64_t)(~((uint64_t) 0))
+
+struct rio_mmap {
+ uint32_t rioid;
+ uint64_t rio_addr;
+ uint64_t length;
+ uint64_t handle;
+ void *address;
+};
+
+struct rio_dma_mem {
+ uint64_t length; /* length of DMA memory */
+ uint64_t dma_handle; /* handle associated with this memory */
+ void *buffer; /* pointer to this memory */
+};
+
+
+struct rio_event {
+ unsigned int header; /* event type RIO_DOORBELL or RIO_PORTWRITE */
+ union {
+ struct rio_doorbell doorbell; /* header for RIO_DOORBELL */
+ struct rio_portwrite portwrite; /* header for RIO_PORTWRITE */
+ } u;
+};
+
+enum rio_transfer_sync {
+ RIO_TRANSFER_SYNC, /* synchronous transfer */
+ RIO_TRANSFER_ASYNC, /* asynchronous transfer */
+ RIO_TRANSFER_FAF, /* fire-and-forget transfer */
+};
+
+enum rio_transfer_dir {
+ RIO_TRANSFER_DIR_READ, /* Read operation */
+ RIO_TRANSFER_DIR_WRITE, /* Write operation */
+};
+
+/*
+ * RapidIO data exchange transactions are lists of individual transfers. Each
+ * transfer exchanges data between two RapidIO devices by remote direct memory
+ * access and has its own completion code.
+ *
+ * The RapidIO specification defines four types of data exchange requests:
+ * NREAD, NWRITE, SWRITE and NWRITE_R. The RapidIO DMA channel interface allows
+ * to specify the required type of write operation or combination of them when
+ * only the last data packet requires response.
+ *
+ * NREAD: read up to 256 bytes from remote device memory into local memory
+ * NWRITE: write up to 256 bytes from local memory to remote device memory
+ * without confirmation
+ * SWRITE: as NWRITE, but all addresses and payloads must be 64-bit aligned
+ * NWRITE_R: as NWRITE, but expect acknowledgment from remote device.
+ *
+ * The default exchange is chosen from NREAD and any of the WRITE modes as the
+ * driver sees fit. For write requests the user can explicitly choose between
+ * any of the write modes for each transaction.
+ */
+enum rio_exchange {
+ RIO_EXCHANGE_DEFAULT, /* Default method */
+ RIO_EXCHANGE_NWRITE, /* All packets using NWRITE */
+ RIO_EXCHANGE_SWRITE, /* All packets using SWRITE */
+ RIO_EXCHANGE_NWRITE_R, /* Last packet NWRITE_R, others NWRITE */
+ RIO_EXCHANGE_SWRITE_R, /* Last packet NWRITE_R, others SWRITE */
+ RIO_EXCHANGE_NWRITE_R_ALL, /* All packets using NWRITE_R */
+};
+
+struct rio_transfer_io {
+ uint32_t rioid; /* Target destID */
+ uint64_t rio_addr; /* Address in target's RIO mem space */
+ enum rio_exchange method; /* Data exchange method */
+ void __user *loc_addr;
+ uint64_t handle;
+ uint64_t offset; /* Offset in buffer */
+ uint64_t length; /* Length in bytes */
+ uint32_t completion_code; /* Completion code for this transfer */
+};
+
+struct rio_transaction {
+ uint32_t transfer_mode; /* Data transfer mode */
+ enum rio_transfer_sync sync; /* Synchronization method */
+ enum rio_transfer_dir dir; /* Transfer direction */
+ size_t count; /* Number of transfers */
+ struct rio_transfer_io __user *block; /* Array of <count> transfers */
+};
+
+struct rio_async_tx_wait {
+ uint32_t token; /* DMA transaction ID token */
+ uint32_t timeout; /* Wait timeout in msec, if 0 use default TO */
+};
+
+#define RIO_MAX_DEVNAME_SZ 20
+
+struct rio_rdev_info {
+ uint32_t destid;
+ uint8_t hopcount;
+ uint32_t comptag;
+ char name[RIO_MAX_DEVNAME_SZ + 1];
+};
+
+/* Driver IOCTL codes */
+#define RIO_MPORT_DRV_MAGIC 'm'
+
+#define RIO_MPORT_MAINT_HDID_SET \
+ _IOW(RIO_MPORT_DRV_MAGIC, 1, uint16_t)
+#define RIO_MPORT_MAINT_COMPTAG_SET \
+ _IOW(RIO_MPORT_DRV_MAGIC, 2, uint32_t)
+#define RIO_MPORT_MAINT_PORT_IDX_GET \
+ _IOR(RIO_MPORT_DRV_MAGIC, 3, uint32_t)
+#define RIO_MPORT_GET_PROPERTIES \
+ _IOR(RIO_MPORT_DRV_MAGIC, 4, struct rio_mport_properties)
+#define RIO_MPORT_MAINT_READ_LOCAL \
+ _IOR(RIO_MPORT_DRV_MAGIC, 5, struct rio_mport_maint_io)
+#define RIO_MPORT_MAINT_WRITE_LOCAL \
+ _IOW(RIO_MPORT_DRV_MAGIC, 6, struct rio_mport_maint_io)
+#define RIO_MPORT_MAINT_READ_REMOTE \
+ _IOR(RIO_MPORT_DRV_MAGIC, 7, struct rio_mport_maint_io)
+#define RIO_MPORT_MAINT_WRITE_REMOTE \
+ _IOW(RIO_MPORT_DRV_MAGIC, 8, struct rio_mport_maint_io)
+#define RIO_ENABLE_DOORBELL_RANGE \
+ _IOW(RIO_MPORT_DRV_MAGIC, 9, struct rio_doorbell_filter)
+#define RIO_DISABLE_DOORBELL_RANGE \
+ _IOW(RIO_MPORT_DRV_MAGIC, 10, struct rio_doorbell_filter)
+#define RIO_ENABLE_PORTWRITE_RANGE \
+ _IOW(RIO_MPORT_DRV_MAGIC, 11, struct rio_pw_filter)
+#define RIO_DISABLE_PORTWRITE_RANGE \
+ _IOW(RIO_MPORT_DRV_MAGIC, 12, struct rio_pw_filter)
+#define RIO_SET_EVENT_MASK \
+ _IOW(RIO_MPORT_DRV_MAGIC, 13, unsigned int)
+#define RIO_GET_EVENT_MASK \
+ _IOR(RIO_MPORT_DRV_MAGIC, 14, unsigned int)
+#define RIO_MAP_OUTBOUND \
+ _IOWR(RIO_MPORT_DRV_MAGIC, 15, struct rio_mmap)
+#define RIO_UNMAP_OUTBOUND \
+ _IOW(RIO_MPORT_DRV_MAGIC, 16, struct rio_mmap)
+#define RIO_MAP_INBOUND \
+ _IOWR(RIO_MPORT_DRV_MAGIC, 17, struct rio_mmap)
+#define RIO_UNMAP_INBOUND \
+ _IOW(RIO_MPORT_DRV_MAGIC, 18, uint64_t)
+#define RIO_ALLOC_DMA \
+ _IOWR(RIO_MPORT_DRV_MAGIC, 19, struct rio_dma_mem)
+#define RIO_FREE_DMA \
+ _IOW(RIO_MPORT_DRV_MAGIC, 20, uint64_t)
+#define RIO_TRANSFER \
+ _IOWR(RIO_MPORT_DRV_MAGIC, 21, struct rio_transaction)
+#define RIO_WAIT_FOR_ASYNC \
+ _IOW(RIO_MPORT_DRV_MAGIC, 22, struct rio_async_tx_wait)
+#define RIO_DEV_ADD \
+ _IOW(RIO_MPORT_DRV_MAGIC, 23, struct rio_rdev_info)
+#define RIO_DEV_DEL \
+ _IOW(RIO_MPORT_DRV_MAGIC, 24, struct rio_rdev_info)
+
+#endif /* _RIO_MPORT_CDEV_H_ */
diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index 0495884defc1..b71fd0b5cbad 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -354,6 +354,7 @@ header-y += reiserfs_fs.h
header-y += reiserfs_xattr.h
header-y += resource.h
header-y += rfkill.h
+header-y += rio_mport_cdev.h
header-y += romfs_fs.h
header-y += rose.h
header-y += route.h