xref: /kernel/linux/linux-6.6/drivers/dma/ppc4xx/xor.h (revision 62306a36)
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * 440SPe's XOR engines support header file
4 *
5 * 2006-2009 (C) DENX Software Engineering.
6 *
7 * Author: Yuri Tikhonov <yur@emcraft.com>
8 */
9
10#ifndef _PPC440SPE_XOR_H
11#define _PPC440SPE_XOR_H
12
13#include <linux/types.h>
14
15/* Number of XOR engines available on the contoller */
16#define XOR_ENGINES_NUM		1
17
18/* Number of operands supported in the h/w */
19#define XOR_MAX_OPS		16
20
21/*
22 * XOR Command Block Control Register bits
23 */
24#define XOR_CBCR_LNK_BIT        (1<<31) /* link present */
25#define XOR_CBCR_TGT_BIT        (1<<30) /* target present */
26#define XOR_CBCR_CBCE_BIT       (1<<29) /* command block compete enable */
27#define XOR_CBCR_RNZE_BIT       (1<<28) /* result not zero enable */
28#define XOR_CBCR_XNOR_BIT       (1<<15) /* XOR/XNOR */
29#define XOR_CDCR_OAC_MSK        (0x7F)  /* operand address count */
30
31/*
32 * XORCore Status Register bits
33 */
34#define XOR_SR_XCP_BIT		(1<<31)	/* core processing */
35#define XOR_SR_ICB_BIT		(1<<17)	/* invalid CB */
36#define XOR_SR_IC_BIT		(1<<16)	/* invalid command */
37#define XOR_SR_IPE_BIT		(1<<15)	/* internal parity error */
38#define XOR_SR_RNZ_BIT		(1<<2)	/* result not Zero */
39#define XOR_SR_CBC_BIT		(1<<1)	/* CB complete */
40#define XOR_SR_CBLC_BIT		(1<<0)	/* CB list complete */
41
42/*
43 * XORCore Control Set and Reset Register bits
44 */
45#define XOR_CRSR_XASR_BIT	(1<<31)	/* soft reset */
46#define XOR_CRSR_XAE_BIT	(1<<30)	/* enable */
47#define XOR_CRSR_RCBE_BIT	(1<<29)	/* refetch CB enable */
48#define XOR_CRSR_PAUS_BIT	(1<<28)	/* pause */
49#define XOR_CRSR_64BA_BIT	(1<<27) /* 64/32 CB format */
50#define XOR_CRSR_CLP_BIT	(1<<25)	/* continue list processing */
51
52/*
53 * XORCore Interrupt Enable Register
54 */
55#define XOR_IE_ICBIE_BIT	(1<<17)	/* Invalid Command Block IRQ Enable */
56#define XOR_IE_ICIE_BIT		(1<<16)	/* Invalid Command IRQ Enable */
57#define XOR_IE_RPTIE_BIT	(1<<14)	/* Read PLB Timeout Error IRQ Enable */
58#define XOR_IE_CBCIE_BIT	(1<<1)	/* CB complete interrupt enable */
59#define XOR_IE_CBLCI_BIT	(1<<0)	/* CB list complete interrupt enable */
60
61/*
62 * XOR Accelerator engine Command Block Type
63 */
64struct xor_cb {
65	/*
66	 * Basic 64-bit format XOR CB (Table 19-1, p.463, 440spe_um_1_22.pdf)
67	 */
68	u32	cbc;		/* control */
69	u32	cbbc;		/* byte count */
70	u32	cbs;		/* status */
71	u8	pad0[4];	/* reserved */
72	u32	cbtah;		/* target address high */
73	u32	cbtal;		/* target address low */
74	u32	cblah;		/* link address high */
75	u32	cblal;		/* link address low */
76	struct {
77		u32 h;
78		u32 l;
79	} __attribute__ ((packed)) ops[16];
80} __attribute__ ((packed));
81
82/*
83 * XOR hardware registers Table 19-3, UM 1.22
84 */
85struct xor_regs {
86	u32	op_ar[16][2];	/* operand address[0]-high,[1]-low registers */
87	u8	pad0[352];	/* reserved */
88	u32	cbcr;		/* CB control register */
89	u32	cbbcr;		/* CB byte count register */
90	u32	cbsr;		/* CB status register */
91	u8	pad1[4];	/* reserved */
92	u32	cbtahr;		/* operand target address high register */
93	u32	cbtalr;		/* operand target address low register */
94	u32	cblahr;		/* CB link address high register */
95	u32	cblalr;		/* CB link address low register */
96	u32	crsr;		/* control set register */
97	u32	crrr;		/* control reset register */
98	u32	ccbahr;		/* current CB address high register */
99	u32	ccbalr;		/* current CB address low register */
100	u32	plbr;		/* PLB configuration register */
101	u32	ier;		/* interrupt enable register */
102	u32	pecr;		/* parity error count register */
103	u32	sr;		/* status register */
104	u32	revidr;		/* revision ID register */
105};
106
107#endif /* _PPC440SPE_XOR_H */
108