aboutsummaryrefslogtreecommitdiffstats
path: root/include/sbhnddma.h
blob: ff6a044f04ac89109dbb4494a0df74b08600e11f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
/*
 * Generic Broadcom Home Networking Division (HND) DMA engine HW interface
 * This supports the following chips: BCM42xx, 44xx, 47xx .
 *
 * Copyright 2007, Broadcom Corporation
 * All Rights Reserved.
 * 
 * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
 * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
 * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
 *
 * $Id: sbhnddma.h,v 1.1.1.1 2008/07/21 09:14:16 james26_jang Exp $
 */

#ifndef	_sbhnddma_h_
#define	_sbhnddma_h_

/* DMA structure:
 *  support two DMA engines: 32 bits address or 64 bit addressing
 *  basic DMA register set is per channel(transmit or receive)
 *  a pair of channels is defined for convenience
 */


/* 32 bits addressing */

/* dma registers per channel(xmt or rcv) */
typedef volatile struct {
	uint32	control;		/* enable, et al */
	uint32	addr;			/* descriptor ring base address (4K aligned) */
	uint32	ptr;			/* last descriptor posted to chip */
	uint32	status;			/* current active descriptor, et al */
} dma32regs_t;

typedef volatile struct {
	dma32regs_t	xmt;		/* dma tx channel */
	dma32regs_t	rcv;		/* dma rx channel */
} dma32regp_t;

typedef volatile struct {	/* diag access */
	uint32	fifoaddr;		/* diag address */
	uint32	fifodatalow;		/* low 32bits of data */
	uint32	fifodatahigh;		/* high 32bits of data */
	uint32	pad;			/* reserved */
} dma32diag_t;

/*
 * DMA Descriptor
 * Descriptors are only read by the hardware, never written back.
 */
typedef volatile struct {
	uint32	ctrl;		/* misc control bits & bufcount */
	uint32	addr;		/* data buffer address */
} dma32dd_t;

/*
 * Each descriptor ring must be 4096byte aligned, and fit within a single 4096byte page.
 */
#define	D32MAXRINGSZ	4096
#define	D32RINGALIGN	4096
#define	D32MAXDD	(D32MAXRINGSZ / sizeof (dma32dd_t))

/* transmit channel control */
#define	XC_XE		((uint32)1 << 0)	/* transmit enable */
#define	XC_SE		((uint32)1 << 1)	/* transmit suspend request */
#define	XC_LE		((uint32)1 << 2)	/* loopback enable */
#define	XC_FL		((uint32)1 << 4)	/* flush request */
#define	XC_AE		((uint32)3 << 16)	/* address extension bits */
#define	XC_AE_SHIFT	16

/* transmit descriptor table pointer */
#define	XP_LD_MASK	0xfff			/* last valid descriptor */

/* transmit channel status */
#define	XS_CD_MASK	0x0fff			/* current descriptor pointer */
#define	XS_XS_MASK	0xf000			/* transmit state */
#define	XS_XS_SHIFT	12
#define	XS_XS_DISABLED	0x0000			/* disabled */
#define	XS_XS_ACTIVE	0x1000			/* active */
#define	XS_XS_IDLE	0x2000			/* idle wait */
#define	XS_XS_STOPPED	0x3000			/* stopped */
#define	XS_XS_SUSP	0x4000			/* suspend pending */
#define	XS_XE_MASK	0xf0000			/* transmit errors */
#define	XS_XE_SHIFT	16
#define	XS_XE_NOERR	0x00000			/* no error */
#define	XS_XE_DPE	0x10000			/* descriptor protocol error */
#define	XS_XE_DFU	0x20000			/* data fifo underrun */
#define	XS_XE_BEBR	0x30000			/* bus error on buffer read */
#define	XS_XE_BEDA	0x40000			/* bus error on descriptor access */
#define	XS_AD_MASK	0xfff00000		/* active descriptor */
#define	XS_AD_SHIFT	20

/* receive channel control */
#define	RC_RE		((uint32)1 << 0)	/* receive enable */
#define	RC_RO_MASK	0xfe			/* receive frame offset */
#define	RC_RO_SHIFT	1
#define	RC_FM		((uint32)1 << 8)	/* direct fifo receive (pio) mode */
#define	RC_AE		((uint32)3 << 16)	/* address extension bits */
#define	RC_AE_SHIFT	16

/* receive descriptor table pointer */
#define	RP_LD_MASK	0xfff			/* last valid descriptor */

/* receive channel status */
#define	RS_CD_MASK	0x0fff			/* current descriptor pointer */
#define	RS_RS_MASK	0xf000			/* receive state */
#define	RS_RS_SHIFT	12
#define	RS_RS_DISABLED	0x0000			/* disabled */
#define	RS_RS_ACTIVE	0x1000			/* active */
#define	RS_RS_IDLE	0x2000			/* idle wait */
#define	RS_RS_STOPPED	0x3000			/* reserved */
#define	RS_RE_MASK	0xf0000			/* receive errors */
#define	RS_RE_SHIFT	16
#define	RS_RE_NOERR	0x00000			/* no error */
#define	RS_RE_DPE	0x10000			/* descriptor protocol error */
#define	RS_RE_DFO	0x20000			/* data fifo overflow */
#define	RS_RE_BEBW	0x30000			/* bus error on buffer write */
#define	RS_RE_BEDA	0x40000			/* bus error on descriptor access */
#define	RS_AD_MASK	0xfff00000		/* active descriptor */
#define	RS_AD_SHIFT	20

/* fifoaddr */
#define	FA_OFF_MASK	0xffff			/* offset */
#define	FA_SEL_MASK	0xf0000			/* select */
#define	FA_SEL_SHIFT	16
#define	FA_SEL_XDD	0x00000			/* transmit dma data */
#define	FA_SEL_XDP	0x10000			/* transmit dma pointers */
#define	FA_SEL_RDD	0x40000			/* receive dma data */
#define	FA_SEL_RDP	0x50000			/* receive dma pointers */
#define	FA_SEL_XFD	0x80000			/* transmit fifo data */
#define	FA_SEL_XFP	0x90000			/* transmit fifo pointers */
#define	FA_SEL_RFD	0xc0000			/* receive fifo data */
#define	FA_SEL_RFP	0xd0000			/* receive fifo pointers */
#define	FA_SEL_RSD	0xe0000			/* receive frame status data */
#define	FA_SEL_RSP	0xf0000			/* receive frame status pointers */

/* descriptor control flags */
#define	CTRL_BC_MASK	0x1fff			/* buffer byte count */
#define	CTRL_AE		((uint32)3 << 16)	/* address extension bits */
#define	CTRL_AE_SHIFT	16
#define	CTRL_EOT	((uint32)1 << 28)	/* end of descriptor table */
#define	CTRL_IOC	((uint32)1 << 29)	/* interrupt on completion */
#define	CTRL_EOF	((uint32)1 << 30)	/* end of frame */
#define	CTRL_SOF	((uint32)1 << 31)	/* start of frame */

/* control flags in the range [27:20] are core-specific and not defined here */
#define	CTRL_CORE_MASK	0x0ff00000

/* 64 bits addressing */

/* dma registers per channel(xmt or rcv) */
typedef volatile struct {
	uint32	control;		/* enable, et al */
	uint32	ptr;			/* last descriptor posted to chip */
	uint32	addrlow;		/* descriptor ring base address low 32-bits (8K aligned) */
	uint32	addrhigh;		/* descriptor ring base address bits 63:32 (8K aligned) */
	uint32	status0;		/* current descriptor, xmt state */
	uint32	status1;		/* active descriptor, xmt error */
} dma64regs_t;

typedef volatile struct {
	dma64regs_t	tx;		/* dma64 tx channel */
	dma64regs_t	rx;		/* dma64 rx channel */
} dma64regp_t;

typedef volatile struct {		/* diag access */
	uint32	fifoaddr;		/* diag address */
	uint32	fifodatalow;		/* low 32bits of data */
	uint32	fifodatahigh;		/* high 32bits of data */
	uint32	pad;			/* reserved */
} dma64diag_t;

/*
 * DMA Descriptor
 * Descriptors are only read by the hardware, never written back.
 */
typedef volatile struct {
	uint32	ctrl1;		/* misc control bits & bufcount */
	uint32	ctrl2;		/* buffer count and address extension */
	uint32	addrlow;	/* memory address of the date buffer, bits 31:0 */
	uint32	addrhigh;	/* memory address of the date buffer, bits 63:32 */
} dma64dd_t;

/*
 * Each descriptor ring must be 8kB aligned, and fit within a contiguous 8kB physical addresss.
 */
#define	D64MAXRINGSZ	8192
#define	D64RINGALIGN	8192
#define	D64MAXDD	(D64MAXRINGSZ / sizeof (dma64dd_t))

/* transmit channel control */
#define	D64_XC_XE		0x00000001	/* transmit enable */
#define	D64_XC_SE		0x00000002	/* transmit suspend request */
#define	D64_XC_LE		0x00000004	/* loopback enable */
#define	D64_XC_FL		0x00000010	/* flush request */
#define	D64_XC_AE		0x00030000	/* address extension bits */
#define	D64_XC_AE_SHIFT		16

/* transmit descriptor table pointer */
#define	D64_XP_LD_MASK		0x00000fff	/* last valid descriptor */

/* transmit channel status */
#define	D64_XS0_CD_MASK		0x00001fff	/* current descriptor pointer */
#define	D64_XS0_XS_MASK		0xf0000000     	/* transmit state */
#define	D64_XS0_XS_SHIFT		28
#define	D64_XS0_XS_DISABLED	0x00000000	/* disabled */
#define	D64_XS0_XS_ACTIVE	0x10000000	/* active */
#define	D64_XS0_XS_IDLE		0x20000000	/* idle wait */
#define	D64_XS0_XS_STOPPED	0x30000000	/* stopped */
#define	D64_XS0_XS_SUSP		0x40000000	/* suspend pending */

#define	D64_XS1_AD_MASK		0x0001ffff	/* active descriptor */
#define	D64_XS1_XE_MASK		0xf0000000     	/* transmit errors */
#define	D64_XS1_XE_SHIFT		28
#define	D64_XS1_XE_NOERR	0x00000000	/* no error */
#define	D64_XS1_XE_DPE		0x10000000	/* descriptor protocol error */
#define	D64_XS1_XE_DFU		0x20000000	/* data fifo underrun */
#define	D64_XS1_XE_DTE		0x30000000	/* data transfer error */
#define	D64_XS1_XE_DESRE	0x40000000	/* descriptor read error */
#define	D64_XS1_XE_COREE	0x50000000	/* core error */

/* receive channel control */
#define	D64_RC_RE		0x00000001	/* receive enable */
#define	D64_RC_RO_MASK		0x000000fe	/* receive frame offset */
#define	D64_RC_RO_SHIFT		1
#define	D64_RC_FM		0x00000100	/* direct fifo receive (pio) mode */
#define	D64_RC_AE		0x00030000	/* address extension bits */
#define	D64_RC_AE_SHIFT		16

/* receive descriptor table pointer */
#define	D64_RP_LD_MASK		0x00000fff	/* last valid descriptor */

/* receive channel status */
#define	D64_RS0_CD_MASK		0x00001fff	/* current descriptor pointer */
#define	D64_RS0_RS_MASK		0xf0000000     	/* receive state */
#define	D64_RS0_RS_SHIFT		28
#define	D64_RS0_RS_DISABLED	0x00000000	/* disabled */
#define	D64_RS0_RS_ACTIVE	0x10000000	/* active */
#define	D64_RS0_RS_IDLE		0x20000000	/* idle wait */
#define	D64_RS0_RS_STOPPED	0x30000000	/* stopped */
#define	D64_RS0_RS_SUSP		0x40000000	/* suspend pending */

#define	D64_RS1_AD_MASK		0x0001ffff	/* active descriptor */
#define	D64_RS1_RE_MASK		0xf0000000     	/* receive errors */
#define	D64_RS1_RE_SHIFT		28
#define	D64_RS1_RE_NOERR	0x00000000	/* no error */
#define	D64_RS1_RE_DPO		0x10000000	/* descriptor protocol error */
#define	D64_RS1_RE_DFU		0x20000000	/* data fifo overflow */
#define	D64_RS1_RE_DTE		0x30000000	/* data transfer error */
#define	D64_RS1_RE_DESRE	0x40000000	/* descriptor read error */
#define	D64_RS1_RE_COREE	0x50000000	/* core error */

/* fifoaddr */
#define	D64_FA_OFF_MASK		0xffff		/* offset */
#define	D64_FA_SEL_MASK		0xf0000		/* select */
#define	D64_FA_SEL_SHIFT	16
#define	D64_FA_SEL_XDD		0x00000		/* transmit dma data */
#define	D64_FA_SEL_XDP		0x10000		/* transmit dma pointers */
#define	D64_FA_SEL_RDD		0x40000		/* receive dma data */
#define	D64_FA_SEL_RDP		0x50000		/* receive dma pointers */
#define	D64_FA_SEL_XFD		0x80000		/* transmit fifo data */
#define	D64_FA_SEL_XFP		0x90000		/* transmit fifo pointers */
#define	D64_FA_SEL_RFD		0xc0000		/* receive fifo data */
#define	D64_FA_SEL_RFP		0xd0000		/* receive fifo pointers */
#define	D64_FA_SEL_RSD		0xe0000		/* receive frame status data */
#define	D64_FA_SEL_RSP		0xf0000		/* receive frame status pointers */

/* descriptor control flags 1 */
#define	D64_CTRL1_EOT		((uint32)1 << 28)	/* end of descriptor table */
#define	D64_CTRL1_IOC		((uint32)1 << 29)	/* interrupt on completion */
#define	D64_CTRL1_EOF		((uint32)1 << 30)	/* end of frame */
#define	D64_CTRL1_SOF		((uint32)1 << 31)	/* start of frame */

/* descriptor control flags 2 */
#define	D64_CTRL2_BC_MASK	0x00007fff	/* buffer byte count mask */
#define	D64_CTRL2_AE		0x00030000	/* address extension bits */
#define	D64_CTRL2_AE_SHIFT	16

/* control flags in the range [27:20] are core-specific and not defined here */
#define	D64_CTRL_CORE_MASK	0x0ff00000


#endif	/* _sbhnddma_h_ */
bues.ch cgit interface