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31c88965 GR |
1 | /* Copyright 2013-2014 Freescale Semiconductor Inc. |
2 | * | |
3 | * Interface of the I/O services to send MC commands to the MC hardware | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions are met: | |
7 | * * Redistributions of source code must retain the above copyright | |
8 | * notice, this list of conditions and the following disclaimer. | |
9 | * * Redistributions in binary form must reproduce the above copyright | |
10 | * notice, this list of conditions and the following disclaimer in the | |
11 | * documentation and/or other materials provided with the distribution. | |
12 | * * Neither the name of the above-listed copyright holders nor the | |
13 | * names of any contributors may be used to endorse or promote products | |
14 | * derived from this software without specific prior written permission. | |
15 | * | |
16 | * | |
17 | * ALTERNATIVELY, this software may be distributed under the terms of the | |
18 | * GNU General Public License ("GPL") as published by the Free Software | |
19 | * Foundation, either version 2 of that License or (at your option) any | |
20 | * later version. | |
21 | * | |
22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
23 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE | |
26 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
27 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
28 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
29 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
30 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
31 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
32 | * POSSIBILITY OF SUCH DAMAGE. | |
33 | */ | |
34 | ||
35 | #ifndef _FSL_MC_SYS_H | |
36 | #define _FSL_MC_SYS_H | |
37 | ||
38 | #include <linux/types.h> | |
39 | #include <linux/errno.h> | |
63f2be5c GR |
40 | #include <linux/mutex.h> |
41 | #include <linux/spinlock.h> | |
31c88965 | 42 | |
3f95ad21 GR |
43 | /** |
44 | * Bit masks for a MC I/O object (struct fsl_mc_io) flags | |
45 | */ | |
46 | #define FSL_MC_IO_ATOMIC_CONTEXT_PORTAL 0x0001 | |
47 | ||
197f4d6a | 48 | struct fsl_mc_resource; |
31c88965 GR |
49 | struct mc_command; |
50 | ||
51 | /** | |
52 | * struct fsl_mc_io - MC I/O object to be passed-in to mc_send_command() | |
53 | * @dev: device associated with this Mc I/O object | |
54 | * @flags: flags for mc_send_command() | |
55 | * @portal_size: MC command portal size in bytes | |
56 | * @portal_phys_addr: MC command portal physical address | |
57 | * @portal_virt_addr: MC command portal virtual address | |
ffcd52ef | 58 | * @dpmcp_dev: pointer to the DPMCP device associated with the MC portal. |
63f2be5c GR |
59 | * |
60 | * Fields are only meaningful if the FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is not | |
61 | * set: | |
62 | * @mutex: Mutex to serialize mc_send_command() calls that use the same MC | |
63 | * portal, if the fsl_mc_io object was created with the | |
64 | * FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag off. mc_send_command() calls for this | |
65 | * fsl_mc_io object must be made only from non-atomic context. | |
66 | * | |
67 | * Fields are only meaningful if the FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is | |
68 | * set: | |
69 | * @spinlock: Spinlock to serialize mc_send_command() calls that use the same MC | |
70 | * portal, if the fsl_mc_io object was created with the | |
71 | * FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag on. mc_send_command() calls for this | |
72 | * fsl_mc_io object can be made from atomic or non-atomic context. | |
31c88965 GR |
73 | */ |
74 | struct fsl_mc_io { | |
75 | struct device *dev; | |
eceebf8b GR |
76 | u16 flags; |
77 | u16 portal_size; | |
31c88965 GR |
78 | phys_addr_t portal_phys_addr; |
79 | void __iomem *portal_virt_addr; | |
ffcd52ef | 80 | struct fsl_mc_device *dpmcp_dev; |
63f2be5c GR |
81 | union { |
82 | /* | |
83 | * This field is only meaningful if the | |
84 | * FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is not set | |
85 | */ | |
86 | struct mutex mutex; /* serializes mc_send_command() */ | |
87 | ||
88 | /* | |
89 | * This field is only meaningful if the | |
90 | * FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is set | |
91 | */ | |
92 | spinlock_t spinlock; /* serializes mc_send_command() */ | |
93 | }; | |
31c88965 GR |
94 | }; |
95 | ||
31c88965 GR |
96 | int mc_send_command(struct fsl_mc_io *mc_io, struct mc_command *cmd); |
97 | ||
98 | #endif /* _FSL_MC_SYS_H */ |