xref: /illumos-gate/usr/src/uts/sun4/io/px/px_mmu.h (revision 25cf1a301a396c38e8adf52c15f537b80d2483f7)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #ifndef	_SYS_PX_MMU_H
27 #define	_SYS_PX_MMU_H
28 
29 #pragma ident	"%Z%%M%	%I%	%E% SMI"
30 
31 #ifdef	__cplusplus
32 extern "C" {
33 #endif
34 
35 #include <sys/vmem.h>
36 
37 typedef uint64_t px_dvma_addr_t;
38 typedef uint64_t px_dma_bypass_addr_t;
39 typedef uint64_t px_dma_peer_addr_t;
40 typedef uint16_t px_dvma_context_t;
41 typedef uint64_t px_window_t;
42 
43 /*
44  * boiler plate for tte (everything except the pfn)
45  */
46 #define	PX_GET_TTE_ATTR(flags, attr)\
47 	(((flags & DDI_DMA_READ) ? PCI_MAP_ATTR_WRITE : 0) | \
48 	((flags & DDI_DMA_WRITE) ? PCI_MAP_ATTR_READ : 0) | \
49 	((attr & DDI_DMA_RELAXED_ORDERING) ? PCI_MAP_ATTR_RO : 0))
50 
51 /*
52  * mmu block soft state structure:
53  *
54  * Each px node may share an mmu block structure with its peer
55  * node of have its own private mmu block structure.
56  */
57 typedef struct px_mmu {
58 	px_t *mmu_px_p;	/* link back to px soft state */
59 	int mmu_inst;
60 
61 	/*
62 	 * address ranges of dvma space:
63 	 */
64 	px_dvma_addr_t mmu_dvma_base;
65 	px_dvma_addr_t mmu_dvma_end;
66 	px_dvma_addr_t mmu_dvma_fast_end;
67 	px_dvma_addr_t dvma_base_pg;	/* = MMU_BTOP(mmu_dvma_base) */
68 	px_dvma_addr_t dvma_end_pg;	/* = MMU_BTOP(mmu_dvma_end) */
69 
70 	/*
71 	 * virtual memory map and callback id for dvma space:
72 	 */
73 	vmem_t *mmu_dvma_map;
74 	uintptr_t mmu_dvma_clid;
75 
76 	/*
77 	 * fields for fast dvma interfaces:
78 	 */
79 	ulong_t mmu_dvma_reserve;
80 
81 	/*
82 	 * dvma fast track page cache byte map
83 	 */
84 	uint8_t *mmu_dvma_cache_locks;
85 	uint_t mmu_dvma_addr_scan_start;
86 
87 	/* dvma debug */
88 	kmutex_t dvma_debug_lock;
89 	uint32_t dvma_alloc_rec_index;
90 	uint32_t dvma_free_rec_index;
91 	uint32_t dvma_active_count;
92 
93 	struct px_dvma_rec *dvma_alloc_rec;
94 	struct px_dvma_rec *dvma_free_rec;
95 	struct px_dvma_rec *dvma_active_list;
96 } px_mmu_t;
97 
98 typedef struct px_dvma_range_prop {
99 	uint32_t dvma_base;
100 	uint32_t dvma_len;
101 } px_dvma_range_prop_t;
102 
103 #define	MMU_PAGE_INDEX(mmu_p, dvma_pg) ((dvma_pg) - (mmu_p)->dvma_base_pg)
104 
105 /* dvma debug */
106 #define	PX_DVMA_DBG_ON(mmu_p)  \
107 	((1ull << (mmu_p)->mmu_inst) & px_dvma_debug_on)
108 #define	PX_DVMA_DBG_OFF(mmu_p) \
109 	((1ull << (mmu_p)->mmu_inst) & px_dvma_debug_off)
110 
111 extern	void px_dvma_debug_fini(px_mmu_t *mmu_p);
112 extern	void px_dvma_alloc_debug(px_mmu_t *mmu_p, char *address, uint_t len,
113 	ddi_dma_impl_t *mp);
114 extern	void px_dvma_free_debug(px_mmu_t *mmu_p, char *address, uint_t len,
115 	ddi_dma_impl_t *mp);
116 
117 /* DVMA routines */
118 extern int px_mmu_map_pages(px_mmu_t *mmu_p, ddi_dma_impl_t *mp,
119     px_dvma_addr_t dvma_pg, size_t npages, size_t pfn_index);
120 extern int px_mmu_map_window(px_mmu_t *mmu_p, ddi_dma_impl_t *mp,
121     px_window_t window);
122 extern void px_mmu_unmap_pages(px_mmu_t *mmu_p, ddi_dma_impl_t *mp,
123     px_dvma_addr_t dvma_pg, uint_t npages);
124 extern void px_mmu_unmap_window(px_mmu_t *mmu_p, ddi_dma_impl_t *mp);
125 
126 /* MMU initialization routines */
127 extern int px_mmu_attach(px_t *px_p);
128 extern void px_mmu_detach(px_t *px_p);
129 
130 #ifdef	__cplusplus
131 }
132 #endif
133 
134 #endif	/* _SYS_PX_MMU_H */
135