source: trunk/kernel/devices/dev_fbf.c @ 190

Last change on this file since 190 was 188, checked in by alain, 5 years ago

Redefine the PIC device API.

File size: 6.8 KB
Line 
1/*
2 * dev_fbf.c - FBF (Block Device Controler) generic device API implementation.
3 *
4 * Author  Alain Greiner    (2016)
5 *
6 * Copyright (c) UPMC Sorbonne Universites
7 *
8 * This file is part of ALMOS-MK
9 *
10 * ALMOS-MKH.is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2.0 of the License.
13 *
14 * ALMOS-MKH.is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with ALMOS-kernel; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#include <kernel_config.h>
25#include <hal_types.h>
26#include <hal_gpt.h>
27#include <soclib_bdv.h>
28#include <soclib_hba.h>
29//#include <soclib_sdc.h>
30//#include <soclib_spi.h>
31//#include <soclib_rdk.h>
32#include <thread.h>
33#include <printk.h>
34#include <chdev.h>
35#include <dev_fbf.h>
36
37/////////////////////////////////////////////////////////////////////////////////////////
38// Extern global variables
39/////////////////////////////////////////////////////////////////////////////////////////
40
41extern chdev_directory_t  chdev_dir;         // allocated in kernel_init.c
42
43////////////////////////////////////
44void dev_fbf_init( chdev_t  * chdev )
45{
46    // set FBF chdev extension fields
47    // TODO this should be done in the impementation
48    // TODO specific part, as these parameters must be obtained from the hardware.
49    chdev->ext.fbf.width  = CONFIG_FBF_WIDTH;
50    chdev->ext.fbf.height = CONFIG_FBF_HEIGHT;
51
52    // get implementation
53    uint32_t  impl = chdev->impl;
54
55    // set chdev name
56    strcpy( chdev->name, "fbf" );
57
58    // call driver init function
59    if( impl == IMPL_FBF_SCL )
60    {
61        // TODO
62    }
63    else
64    {
65        assert( false , __FUNCTION__ , "undefined FBF device implementation" );
66    }
67
68}  // end dev_fbf_init()
69
70/////////////////////////////////////////
71void dev_fbf_get_size( uint32_t  * width,
72                       uint32_t  * height )
73{
74    // get extended pointer on FBF chdev descriptor
75    xptr_t  dev_xp = chdev_dir.fbf[0];
76
77    assert( (dev_xp != XPTR_NULL) , __FUNCTION__ , "undefined FBF chdev descriptor" );
78
79    // get FBF chdev cluster and local pointer
80    cxy_t     dev_cxy = GET_CXY( dev_xp );
81    chdev_t * dev_ptr = (chdev_t *)GET_PTR( dev_xp );
82
83    // return values
84    *width  = hal_remote_lw( XPTR( dev_cxy , &dev_ptr->ext.fbf.width ) );
85    *height = hal_remote_lw( XPTR( dev_cxy , &dev_ptr->ext.fbf.height ) );
86
87}  // end dev_fbf_get_size()
88
89///////////////////////
90error_t dev_fbf_alloc()
91{
92    // get extended pointer on FBF chdev descriptor
93    xptr_t  dev_xp = chdev_dir.fbf[0];
94
95    assert( (dev_xp != XPTR_NULL) , __FUNCTION__ , "undefined FBF chdev descriptor" );
96
97    // get FBF chdev cluster and local pointer
98    cxy_t     dev_cxy = GET_CXY( dev_xp );
99    chdev_t * dev_ptr = (chdev_t *)GET_PTR( dev_xp );
100
101    // try to get FBF ownership
102    return remote_spinlock_trylock( XPTR( dev_cxy , &dev_ptr->wait_lock ) );
103
104}  // end dev_fbf_alloc()
105
106///////////////////
107void dev_fbf_free()
108{
109    // get extended pointer on FBF chdev descriptor
110    xptr_t  dev_xp = chdev_dir.fbf[0];
111
112    assert( (dev_xp != XPTR_NULL) , __FUNCTION__ , "undefined FBF chdev descriptor" );
113
114    // get FBF chdev cluster and local pointer
115    cxy_t     dev_cxy = GET_CXY( dev_xp );
116    chdev_t * dev_ptr = (chdev_t *)GET_PTR( dev_xp );
117
118    // release FBF ownership
119    remote_spinlock_unlock( XPTR( dev_cxy , &dev_ptr->wait_lock ) );
120
121}  // end dev_fbf_free()
122
123//////////////////////////////////////////////////////////////////////////////////
124// This static function is called by dev_fbf_read() & dev_fbf_write() functions.
125// It builds and registers the command in the calling thread descriptor, after
126// translation of buffer virtual address to physical address.
127// Then, it registers the calling thead in chdev waiting queue.
128// Finally it blocks on the THREAD_BLOCKED_DEV condition and deschedule.
129////////////////////////////////////i/////////////////////////////////////////////
130static error_t dev_fbf_access( bool_t    to_fbf,
131                               char    * buffer,
132                               uint32_t  length,
133                               uint32_t  offset )
134{
135    error_t     error;
136    paddr_t     buf_paddr;
137
138    thread_t * this = CURRENT_THREAD;              // pointer on client thread
139
140    // Get buffer physical address
141    error = vmm_v2p_translate( CONFIG_KERNEL_IDENTITY_MAP , buffer , &buf_paddr );
142 
143    if( error )
144    {
145        printk("\n[ERROR] in %s : cannot translate vaddr = %p in process %x\n",
146               __FUNCTION__ , buffer , this->process->pid ); 
147        return EINVAL;
148    }
149
150    fbf_dmsg("\n[INFO] %s : thread %x in process %x / vaddr = %p / paddr = %l\n", 
151             __FUNCTION__ , this->trdid , this->process->pid , buffer , buf_paddr );
152
153    // get extended pointer on FBF chdev descriptor
154    xptr_t  fbf_xp = chdev_dir.fbf[0];
155
156    assert( (fbf_xp != XPTR_NULL) , __FUNCTION__ , "undefined FBF chdev descriptor" );
157
158    // get FBF chdev cluster and local pointer
159    cxy_t     fbf_cxy = GET_CXY( fbf_xp );
160    chdev_t * fbf_ptr = (chdev_t *)GET_PTR( fbf_xp );
161
162    // get frame buffer base address, width and height
163    xptr_t   base   = hal_remote_lwd( XPTR( fbf_cxy , &fbf_ptr->base ) );
164    uint32_t width  = hal_remote_lw ( XPTR( fbf_cxy , &fbf_ptr->ext.fbf.width ) );
165    uint32_t height = hal_remote_lw ( XPTR( fbf_cxy , &fbf_ptr->ext.fbf.height ) );
166
167    // check offset and length versus FBF size
168    if( (offset + length) > (width * height) )
169    {
170        printk("\n[ERROR] in %s : offset = %d / length = %d / width = %d / height = %d\n",
171               __FUNCTION__ , offset , length , width , height ); 
172        return EINVAL;
173    }
174
175    // compute extended pointers on frame buffer and memory buffer
176    xptr_t  mem_buf_xp = XPTR( local_cxy , (void *)(intptr_t)buf_paddr );
177    xptr_t  fbf_buf_xp = base + offset;
178
179    // register command in DMA chdev
180    if( to_fbf )  dev_dma_remote_memcpy( fbf_buf_xp , mem_buf_xp , length );
181    else          dev_dma_remote_memcpy( mem_buf_xp , fbf_buf_xp , length );
182
183    return 0;
184
185}  // end dev_fbf_access()
186
187////////////////////////////////////////////
188error_t dev_fbf_read( char         * buffer,
189                      uint32_t       length,
190                      uint32_t       offset )
191{
192    return dev_fbf_access( false , buffer , length , offset ); 
193} 
194
195////////////////////////////////////////////
196error_t dev_fbf_write( char         * buffer,
197                       uint32_t       length,
198                       uint32_t       offset )
199{
200    return dev_fbf_access( true , buffer , length , offset ); 
201}
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