xref: /openbmc/linux/arch/powerpc/sysdev/fsl_msi.h (revision b886d83c)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2007-2008 Freescale Semiconductor, Inc. All rights reserved.
4  *
5  * Author: Tony Li <tony.li@freescale.com>
6  *	   Jason Jin <Jason.jin@freescale.com>
7  */
8 #ifndef _POWERPC_SYSDEV_FSL_MSI_H
9 #define _POWERPC_SYSDEV_FSL_MSI_H
10 
11 #include <linux/of.h>
12 #include <asm/msi_bitmap.h>
13 
14 #define NR_MSI_REG_MSIIR	8  /* MSIIR can index 8 MSI registers */
15 #define NR_MSI_REG_MSIIR1	16 /* MSIIR1 can index 16 MSI registers */
16 #define NR_MSI_REG_MAX		NR_MSI_REG_MSIIR1
17 #define IRQS_PER_MSI_REG	32
18 #define NR_MSI_IRQS_MAX	(NR_MSI_REG_MAX * IRQS_PER_MSI_REG)
19 
20 #define FSL_PIC_IP_MASK   0x0000000F
21 #define FSL_PIC_IP_MPIC   0x00000001
22 #define FSL_PIC_IP_IPIC   0x00000002
23 #define FSL_PIC_IP_VMPIC  0x00000003
24 
25 #define MSI_HW_ERRATA_ENDIAN 0x00000010
26 
27 struct fsl_msi_cascade_data;
28 
29 struct fsl_msi {
30 	struct irq_domain *irqhost;
31 
32 	unsigned long cascade_irq;
33 
34 	u32 msiir_offset; /* Offset of MSIIR, relative to start of CCSR */
35 	u32 ibs_shift; /* Shift of interrupt bit select */
36 	u32 srs_shift; /* Shift of the shared interrupt register select */
37 	void __iomem *msi_regs;
38 	u32 feature;
39 	struct fsl_msi_cascade_data *cascade_array[NR_MSI_REG_MAX];
40 
41 	struct msi_bitmap bitmap;
42 
43 	struct list_head list;          /* support multiple MSI banks */
44 
45 	phandle phandle;
46 };
47 
48 #endif /* _POWERPC_SYSDEV_FSL_MSI_H */
49 
50