1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * Freescale MPC85xx/MPC86xx RapidIO support
4  *
5  * Copyright 2009 Sysgo AG
6  * Thomas Moll <thomas.moll@sysgo.com>
7  * - fixed maintenance access routines, check for aligned access
8  *
9  * Copyright 2009 Integrated Device Technology, Inc.
10  * Alex Bounine <alexandre.bounine@idt.com>
11  * - Added Port-Write message handling
12  * - Added Machine Check exception handling
13  *
14  * Copyright (C) 2007, 2008, 2010, 2011 Freescale Semiconductor, Inc.
15  * Zhang Wei <wei.zhang@freescale.com>
16  * Lian Minghuan-B31939 <Minghuan.Lian@freescale.com>
17  * Liu Gang <Gang.Liu@freescale.com>
18  *
19  * Copyright 2005 MontaVista Software, Inc.
20  * Matt Porter <mporter@kernel.crashing.org>
21  */
22 
23 #ifndef __FSL_RIO_H
24 #define __FSL_RIO_H
25 
26 #include <linux/rio.h>
27 #include <linux/rio_drv.h>
28 #include <linux/kfifo.h>
29 
30 #define RIO_REGS_WIN(mport)	(((struct rio_priv *)(mport->priv))->regs_win)
31 
32 #define RIO_MAINT_WIN_SIZE	0x400000
33 #define RIO_LTLEDCSR		0x0608
34 
35 #define DOORBELL_ROWAR_EN	0x80000000
36 #define DOORBELL_ROWAR_TFLOWLV	0x08000000 /* highest priority level */
37 #define DOORBELL_ROWAR_PCI	0x02000000 /* PCI window */
38 #define DOORBELL_ROWAR_NREAD	0x00040000 /* NREAD */
39 #define DOORBELL_ROWAR_MAINTRD	0x00070000  /* maintenance read */
40 #define DOORBELL_ROWAR_RES	0x00002000 /* wrtpy: reserved */
41 #define DOORBELL_ROWAR_MAINTWD	0x00007000
42 #define DOORBELL_ROWAR_SIZE	0x0000000b /* window size is 4k */
43 
44 #define RIO_ATMU_REGS_PORT1_OFFSET	0x10c00
45 #define RIO_ATMU_REGS_PORT2_OFFSET	0x10e00
46 #define RIO_S_DBELL_REGS_OFFSET	0x13400
47 #define RIO_S_PW_REGS_OFFSET	0x134e0
48 #define RIO_ATMU_REGS_DBELL_OFFSET	0x10C40
49 #define RIO_INB_ATMU_REGS_PORT1_OFFSET 0x10d60
50 #define RIO_INB_ATMU_REGS_PORT2_OFFSET 0x10f60
51 
52 #define MAX_MSG_UNIT_NUM	2
53 #define MAX_PORT_NUM		4
54 #define RIO_INB_ATMU_COUNT	4
55 
56 struct rio_atmu_regs {
57 	 u32 rowtar;
58 	 u32 rowtear;
59 	 u32 rowbar;
60 	 u32 pad1;
61 	 u32 rowar;
62 	 u32 pad2[3];
63 };
64 
65 struct rio_inb_atmu_regs {
66 	u32 riwtar;
67 	u32 pad1;
68 	u32 riwbar;
69 	u32 pad2;
70 	u32 riwar;
71 	u32 pad3[3];
72 };
73 
74 struct rio_dbell_ring {
75 	void *virt;
76 	dma_addr_t phys;
77 };
78 
79 struct rio_port_write_msg {
80 	 void *virt;
81 	 dma_addr_t phys;
82 	 u32 msg_count;
83 	 u32 err_count;
84 	 u32 discard_count;
85 };
86 
87 struct fsl_rio_dbell {
88 	struct rio_mport *mport[MAX_PORT_NUM];
89 	struct device *dev;
90 	struct rio_dbell_regs __iomem *dbell_regs;
91 	struct rio_dbell_ring dbell_ring;
92 	int bellirq;
93 };
94 
95 struct fsl_rio_pw {
96 	struct rio_mport *mport[MAX_PORT_NUM];
97 	struct device *dev;
98 	struct rio_pw_regs __iomem *pw_regs;
99 	struct rio_port_write_msg port_write_msg;
100 	int pwirq;
101 	struct work_struct pw_work;
102 	struct kfifo pw_fifo;
103 	spinlock_t pw_fifo_lock;
104 };
105 
106 struct rio_priv {
107 	struct device *dev;
108 	void __iomem *regs_win;
109 	struct rio_atmu_regs __iomem *atmu_regs;
110 	struct rio_atmu_regs __iomem *maint_atmu_regs;
111 	struct rio_inb_atmu_regs __iomem *inb_atmu_regs;
112 	void __iomem *maint_win;
113 	void *rmm_handle; /* RapidIO message manager(unit) Handle */
114 };
115 
116 extern void __iomem *rio_regs_win;
117 extern void __iomem *rmu_regs_win;
118 
119 extern resource_size_t rio_law_start;
120 
121 extern struct fsl_rio_dbell *dbell;
122 extern struct fsl_rio_pw *pw;
123 
124 extern int fsl_rio_setup_rmu(struct rio_mport *mport,
125 	struct device_node *node);
126 extern int fsl_rio_port_write_init(struct fsl_rio_pw *pw);
127 extern int fsl_rio_pw_enable(struct rio_mport *mport, int enable);
128 extern void fsl_rio_port_error_handler(int offset);
129 extern int fsl_rio_doorbell_init(struct fsl_rio_dbell *dbell);
130 
131 extern int fsl_rio_doorbell_send(struct rio_mport *mport,
132 				int index, u16 destid, u16 data);
133 extern int fsl_add_outb_message(struct rio_mport *mport,
134 	struct rio_dev *rdev,
135 	int mbox, void *buffer, size_t len);
136 extern int fsl_open_outb_mbox(struct rio_mport *mport,
137 	void *dev_id, int mbox, int entries);
138 extern void fsl_close_outb_mbox(struct rio_mport *mport, int mbox);
139 extern int fsl_open_inb_mbox(struct rio_mport *mport,
140 	void *dev_id, int mbox, int entries);
141 extern void fsl_close_inb_mbox(struct rio_mport *mport, int mbox);
142 extern int fsl_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf);
143 extern void *fsl_get_inb_message(struct rio_mport *mport, int mbox);
144 
145 #endif
146