/*
Copyright 1996,2002,2005 Gregory D. Hager, Alfred A. Rizzi, Noah J. Cowan,
- Jason Lapenta, Scott Smedley, Greg Sharp
+ Jason Lapenta, Scott Smedley, Greg Sharp
This file is part of the DT3155 Device Driver.
File: dt3155_isr.c
Purpose: Buffer management routines, and other routines for the ISR
- (the actual isr is in dt3155_drv.c)
+ (the actual isr is in dt3155_drv.c)
-- Changes --
-------------------------------------------------------------------
03-Jul-2000 JML n/a
02-Apr-2002 SS Mods to make work with separate allocator
- module; Merged John Roll's mods to make work with
- multiple boards.
+ module; Merged John Roll's mods to make work with
+ multiple boards.
10-Jul-2002 GCS Complete rewrite of setup_buffers to disallow
- buffers which span a 4MB boundary.
+ buffers which span a 4MB boundary.
24-Jul-2002 SS GPL licence.
30-Jul-2002 NJC Added support for buffer loop.
31-Jul-2002 NJC Complete rewrite of buffer management
02-Aug-2002 NJC Including slab.h instead of malloc.h (no warning).
- Also, allocator_init() now returns allocator_max
- so cleaned up allocate_buffers() accordingly.
+ Also, allocator_init() now returns allocator_max
+ so cleaned up allocate_buffers() accordingly.
08-Aug-2005 SS port to 2.6 kernel.
*/
* are_empty_buffers
* m is minor # of device
***************************/
-inline bool are_empty_buffers( int m )
+inline bool are_empty_buffers(int m)
{
- return ( dt3155_fbuffer[ m ]->empty_len );
+ return dt3155_fbuffer[m]->empty_len;
}
/**************************
* given by dt3155_fbuffer[m]->empty_buffers[0].
* empty_buffers should never fill up, though this is not checked.
**************************/
-inline void push_empty( int index, int m )
+inline void push_empty(int index, int m)
{
- dt3155_fbuffer[m]->empty_buffers[ dt3155_fbuffer[m]->empty_len ] = index;
+ dt3155_fbuffer[m]->empty_buffers[dt3155_fbuffer[m]->empty_len] = index;
dt3155_fbuffer[m]->empty_len++;
}
/**************************
- * pop_empty( m )
+ * pop_empty(m)
* m is minor # of device
**************************/
-inline int pop_empty( int m )
+inline int pop_empty(int m)
{
dt3155_fbuffer[m]->empty_len--;
- return dt3155_fbuffer[m]->empty_buffers[ dt3155_fbuffer[m]->empty_len ];
+ return dt3155_fbuffer[m]->empty_buffers[dt3155_fbuffer[m]->empty_len];
}
/*************************
- * is_ready_buf_empty( m )
+ * is_ready_buf_empty(m)
* m is minor # of device
*************************/
-inline bool is_ready_buf_empty( int m )
+inline bool is_ready_buf_empty(int m)
{
- return ((dt3155_fbuffer[ m ]->ready_len) == 0);
+ return ((dt3155_fbuffer[m]->ready_len) == 0);
}
/*************************
- * is_ready_buf_full( m )
+ * is_ready_buf_full(m)
* m is minor # of device
* this should *never* be true if there are any active, locked or empty
* buffers, since it corresponds to nbuffers ready buffers!!
* 7/31/02: total rewrite. --NJC
*************************/
-inline bool is_ready_buf_full( int m )
+inline bool is_ready_buf_full(int m)
{
- return ( dt3155_fbuffer[ m ]->ready_len == dt3155_fbuffer[ m ]->nbuffers );
+ return dt3155_fbuffer[m]->ready_len == dt3155_fbuffer[m]->nbuffers;
}
/*****************************************************
- * push_ready( m, buffer )
+ * push_ready(m, buffer)
* m is minor # of device
*
*****************************************************/
-inline void push_ready( int m, int index )
+inline void push_ready(int m, int index)
{
int head = dt3155_fbuffer[m]->ready_head;
- dt3155_fbuffer[ m ]->ready_que[ head ] = index;
- dt3155_fbuffer[ m ]->ready_head = ( (head + 1) %
- (dt3155_fbuffer[ m ]->nbuffers) );
- dt3155_fbuffer[ m ]->ready_len++;
+ dt3155_fbuffer[m]->ready_que[head] = index;
+ dt3155_fbuffer[m]->ready_head = ((head + 1) %
+ (dt3155_fbuffer[m]->nbuffers));
+ dt3155_fbuffer[m]->ready_len++;
}
*
* Simply comptutes the tail given the head and the length.
*****************************************************/
-static inline int get_tail( int m )
+static inline int get_tail(int m)
{
- return ((dt3155_fbuffer[ m ]->ready_head -
- dt3155_fbuffer[ m ]->ready_len +
- dt3155_fbuffer[ m ]->nbuffers)%
- (dt3155_fbuffer[ m ]->nbuffers));
+ return (dt3155_fbuffer[m]->ready_head -
+ dt3155_fbuffer[m]->ready_len +
+ dt3155_fbuffer[m]->nbuffers)%
+ (dt3155_fbuffer[m]->nbuffers);
}
* This assumes that there is a ready buffer ready... should
* be checked (e.g. with is_ready_buf_empty() prior to call.
*****************************************************/
-inline int pop_ready( int m )
+inline int pop_ready(int m)
{
int tail;
tail = get_tail(m);
- dt3155_fbuffer[ m ]->ready_len--;
- return dt3155_fbuffer[ m ]->ready_que[ tail ];
+ dt3155_fbuffer[m]->ready_len--;
+ return dt3155_fbuffer[m]->ready_que[tail];
}
* printques
* m is minor # of device
*****************************************************/
-inline void printques( int m )
+inline void printques(int m)
{
- int head = dt3155_fbuffer[ m ]->ready_head;
+ int head = dt3155_fbuffer[m]->ready_head;
int tail;
- int num = dt3155_fbuffer[ m ]->nbuffers;
+ int num = dt3155_fbuffer[m]->nbuffers;
int frame_index;
int index;
tail = get_tail(m);
printk("\n R:");
- for ( index = tail; index != head; index++, index = index % (num) )
- {
- frame_index = dt3155_fbuffer[ m ]->ready_que[ index ];
- printk(" %d ", frame_index );
+ for (index = tail; index != head; index++, index = index % (num)) {
+ frame_index = dt3155_fbuffer[m]->ready_que[index];
+ printk(" %d ", frame_index);
}
printk("\n E:");
- for ( index = 0; index < dt3155_fbuffer[ m ]->empty_len; index++ )
- {
- frame_index = dt3155_fbuffer[ m ]->empty_buffers[ index ];
- printk(" %d ", frame_index );
+ for (index = 0; index < dt3155_fbuffer[m]->empty_len; index++) {
+ frame_index = dt3155_fbuffer[m]->empty_buffers[index];
+ printk(" %d ", frame_index);
}
- frame_index = dt3155_fbuffer[ m ]->active_buf;
+ frame_index = dt3155_fbuffer[m]->active_buf;
printk("\n A: %d", frame_index);
- frame_index = dt3155_fbuffer[ m ]->locked_buf;
- printk("\n L: %d \n", frame_index );
+ frame_index = dt3155_fbuffer[m]->locked_buf;
+ printk("\n L: %d\n", frame_index);
}
* the start address up to the beginning of the
* next 4MB chunk (assuming bufsize < 4MB).
*****************************************************/
-u32 adjust_4MB (u32 buf_addr, u32 bufsize) {
- if (((buf_addr+bufsize) & UPPER_10_BITS) != (buf_addr & UPPER_10_BITS))
- return (buf_addr+bufsize) & UPPER_10_BITS;
- else
- return buf_addr;
+u32 adjust_4MB(u32 buf_addr, u32 bufsize)
+{
+ if (((buf_addr+bufsize) & UPPER_10_BITS) != (buf_addr & UPPER_10_BITS))
+ return (buf_addr+bufsize) & UPPER_10_BITS;
+ else
+ return buf_addr;
}
* buffers. If there is not enough free space
* try for less memory.
*****************************************************/
-void allocate_buffers (u32 *buf_addr, u32* total_size_kbs,
+void allocate_buffers(u32 *buf_addr, u32* total_size_kbs,
u32 bufsize)
{
/* Compute the minimum amount of memory guaranteed to hold all
printk("DT3155: ...but need at least: %d KB\n", min_size_kbs);
printk("DT3155: ...the allocator has: %d KB\n", allocator_max);
size_kbs = (full_size_kbs <= allocator_max ? full_size_kbs : allocator_max);
- if (size_kbs > min_size_kbs) {
- if ((*buf_addr = allocator_allocate_dma (size_kbs, GFP_KERNEL)) != 0) {
- printk("DT3155: Managed to allocate: %d KB\n", size_kbs);
- *total_size_kbs = size_kbs;
- return;
+ if (size_kbs > min_size_kbs) {
+ if ((*buf_addr = allocator_allocate_dma(size_kbs, GFP_KERNEL)) != 0) {
+ printk("DT3155: Managed to allocate: %d KB\n", size_kbs);
+ *total_size_kbs = size_kbs;
+ return;
+ }
}
- }
/* If we got here, the allocation failed */
- printk ("DT3155: Allocator failed!\n");
+ printk("DT3155: Allocator failed!\n");
*buf_addr = 0;
*total_size_kbs = 0;
return;
int m; /* minor # of device, looped for all devs */
/* zero the fbuffer status and address structure */
- for ( m = 0; m < ndevices; m++)
- {
- dt3155_fbuffer[ m ] = &(dt3155_status[ m ].fbuffer);
+ for (m = 0; m < ndevices; m++) {
+ dt3155_fbuffer[m] = &(dt3155_status[m].fbuffer);
/* Make sure the buffering variables are consistent */
{
- u8 *ptr = (u8 *) dt3155_fbuffer[ m ];
- for( index = 0; index < sizeof(struct dt3155_fbuffer_s); index++)
- *(ptr++)=0;
+ u8 *ptr = (u8 *) dt3155_fbuffer[m];
+ for (index = 0; index < sizeof(struct dt3155_fbuffer_s); index++)
+ *(ptr++) = 0;
}
}
/* allocate a large contiguous chunk of RAM */
- allocate_buffers (&rambuff_addr, &rambuff_size, bufsize);
+ allocate_buffers(&rambuff_addr, &rambuff_size, bufsize);
printk("DT3155: mem info\n");
- printk(" - rambuf_addr = 0x%x \n", rambuff_addr);
- printk(" - length (kb) = %u \n", rambuff_size);
- if( rambuff_addr == 0 )
- {
- printk( KERN_INFO
- "DT3155: Error setup_buffers() allocator dma failed \n" );
- return -ENOMEM;
+ printk(" - rambuf_addr = 0x%x\n", rambuff_addr);
+ printk(" - length (kb) = %u\n", rambuff_size);
+ if (rambuff_addr == 0) {
+ printk(KERN_INFO
+ "DT3155: Error setup_buffers() allocator dma failed\n");
+ return -ENOMEM;
}
*allocatorAddr = rambuff_addr;
rambuff_end = rambuff_addr + 1024 * rambuff_size;
/* after allocation, we need to count how many useful buffers there
are so we can give an equal number to each device */
rambuff_acm = rambuff_addr;
- for ( index = 0; index < MAXBUFFERS; index++) {
- rambuff_acm = adjust_4MB (rambuff_acm, bufsize);/*avoid spanning 4MB bdry*/
- if (rambuff_acm + bufsize > rambuff_end)
- break;
- rambuff_acm += bufsize;
- }
+ for (index = 0; index < MAXBUFFERS; index++) {
+ rambuff_acm = adjust_4MB(rambuff_acm, bufsize);/*avoid spanning 4MB bdry*/
+ if (rambuff_acm + bufsize > rambuff_end)
+ break;
+ rambuff_acm += bufsize;
+ }
/* Following line is OK, will waste buffers if index
* not evenly divisible by ndevices -NJC*/
numbufs = index / ndevices;
printk(" - numbufs = %u\n", numbufs);
- if (numbufs < 2) {
- printk( KERN_INFO
- "DT3155: Error setup_buffers() couldn't allocate 2 bufs/board\n" );
- return -ENOMEM;
- }
+ if (numbufs < 2) {
+ printk(KERN_INFO
+ "DT3155: Error setup_buffers() couldn't allocate 2 bufs/board\n");
+ return -ENOMEM;
+ }
/* now that we have board memory we spit it up */
/* between the boards and the buffers */
- rambuff_acm = rambuff_addr;
- for ( m = 0; m < ndevices; m ++)
- {
- rambuff_acm = adjust_4MB (rambuff_acm, bufsize);
-
- /* Save the start of this boards buffer space (for mmap). */
- dt3155_status[ m ].mem_addr = rambuff_acm;
-
- for (index = 0; index < numbufs; index++)
- {
- rambuff_acm = adjust_4MB (rambuff_acm, bufsize);
- if (rambuff_acm + bufsize > rambuff_end) {
- /* Should never happen */
- printk ("DT3155 PROGRAM ERROR (GCS)\n"
- "Error distributing allocated buffers\n");
- return -ENOMEM;
- }
-
- dt3155_fbuffer[ m ]->frame_info[ index ].addr = rambuff_acm;
- push_empty( index, m );
- /* printk(" - Buffer : %lx\n",
- * dt3155_fbuffer[ m ]->frame_info[ index ].addr );
- */
- dt3155_fbuffer[ m ]->nbuffers += 1;
- rambuff_acm += bufsize;
+ rambuff_acm = rambuff_addr;
+ for (m = 0; m < ndevices; m++) {
+ rambuff_acm = adjust_4MB(rambuff_acm, bufsize);
+
+ /* Save the start of this boards buffer space (for mmap). */
+ dt3155_status[m].mem_addr = rambuff_acm;
+
+ for (index = 0; index < numbufs; index++) {
+ rambuff_acm = adjust_4MB(rambuff_acm, bufsize);
+ if (rambuff_acm + bufsize > rambuff_end) {
+ /* Should never happen */
+ printk("DT3155 PROGRAM ERROR (GCS)\n"
+ "Error distributing allocated buffers\n");
+ return -ENOMEM;
+ }
+
+ dt3155_fbuffer[m]->frame_info[index].addr = rambuff_acm;
+ push_empty(index, m);
+ /* printk(" - Buffer : %lx\n",
+ * dt3155_fbuffer[m]->frame_info[index].addr);
+ */
+ dt3155_fbuffer[m]->nbuffers += 1;
+ rambuff_acm += bufsize;
}
- /* Make sure there is an active buffer there. */
- dt3155_fbuffer[ m ]->active_buf = pop_empty( m );
- dt3155_fbuffer[ m ]->even_happened = 0;
- dt3155_fbuffer[ m ]->even_stopped = 0;
+ /* Make sure there is an active buffer there. */
+ dt3155_fbuffer[m]->active_buf = pop_empty(m);
+ dt3155_fbuffer[m]->even_happened = 0;
+ dt3155_fbuffer[m]->even_stopped = 0;
- /* make sure there is no locked_buf JML 2/28/00 */
- dt3155_fbuffer[ m ]->locked_buf = -1;
+ /* make sure there is no locked_buf JML 2/28/00 */
+ dt3155_fbuffer[m]->locked_buf = -1;
- dt3155_status[ m ].mem_size =
- rambuff_acm - dt3155_status[ m ].mem_addr;
+ dt3155_status[m].mem_size =
+ rambuff_acm - dt3155_status[m].mem_addr;
- /* setup the ready queue */
- dt3155_fbuffer[ m ]->ready_head = 0;
- dt3155_fbuffer[ m ]->ready_len = 0;
- printk("Available buffers for device %d: %d\n",
- m, dt3155_fbuffer[ m ]->nbuffers);
+ /* setup the ready queue */
+ dt3155_fbuffer[m]->ready_head = 0;
+ dt3155_fbuffer[m]->ready_len = 0;
+ printk("Available buffers for device %d: %d\n",
+ m, dt3155_fbuffer[m]->nbuffers);
}
- return 1;
+ return 1;
}
/*****************************************************
*
* m is minor number of device
*****************************************************/
-static inline void internal_release_locked_buffer( int m )
+static inline void internal_release_locked_buffer(int m)
{
/* Pointer into global structure for handling buffers */
- if ( dt3155_fbuffer[ m ]->locked_buf >= 0 )
- {
- push_empty( dt3155_fbuffer[ m ]->locked_buf, m );
- dt3155_fbuffer[ m ]->locked_buf = -1;
+ if (dt3155_fbuffer[m]->locked_buf >= 0) {
+ push_empty(dt3155_fbuffer[m]->locked_buf, m);
+ dt3155_fbuffer[m]->locked_buf = -1;
}
}
* The user function of the above.
*
*****************************************************/
-inline void dt3155_release_locked_buffer( int m )
+inline void dt3155_release_locked_buffer(int m)
{
unsigned long int flags;
local_save_flags(flags);
* m is minor # of device
*
*****************************************************/
-inline int dt3155_flush( int m )
+inline int dt3155_flush(int m)
{
int index;
unsigned long int flags;
local_save_flags(flags);
local_irq_disable();
- internal_release_locked_buffer( m );
- dt3155_fbuffer[ m ]->empty_len = 0;
+ internal_release_locked_buffer(m);
+ dt3155_fbuffer[m]->empty_len = 0;
- for ( index = 0; index < dt3155_fbuffer[ m ]->nbuffers; index++ )
- push_empty( index, m );
+ for (index = 0; index < dt3155_fbuffer[m]->nbuffers; index++)
+ push_empty(index, m);
/* Make sure there is an active buffer there. */
- dt3155_fbuffer[ m ]->active_buf = pop_empty( m );
+ dt3155_fbuffer[m]->active_buf = pop_empty(m);
- dt3155_fbuffer[ m ]->even_happened = 0;
- dt3155_fbuffer[ m ]->even_stopped = 0;
+ dt3155_fbuffer[m]->even_happened = 0;
+ dt3155_fbuffer[m]->even_stopped = 0;
/* setup the ready queue */
- dt3155_fbuffer[ m ]->ready_head = 0;
- dt3155_fbuffer[ m ]->ready_len = 0;
+ dt3155_fbuffer[m]->ready_head = 0;
+ dt3155_fbuffer[m]->ready_len = 0;
local_irq_restore(flags);
* If the user has a buffer locked it will unlock
* that buffer before returning the new one.
*****************************************************/
-inline int dt3155_get_ready_buffer( int m )
+inline int dt3155_get_ready_buffer(int m)
{
int frame_index;
unsigned long int flags;
local_irq_disable();
#ifdef DEBUG_QUES_A
- printques( m );
+ printques(m);
#endif
- internal_release_locked_buffer( m );
+ internal_release_locked_buffer(m);
- if (is_ready_buf_empty( m ))
- frame_index = -1;
- else
- {
- frame_index = pop_ready( m );
- dt3155_fbuffer[ m ]->locked_buf = frame_index;
+ if (is_ready_buf_empty(m))
+ frame_index = -1;
+ else {
+ frame_index = pop_ready(m);
+ dt3155_fbuffer[m]->locked_buf = frame_index;
}
#ifdef DEBUG_QUES_B
- printques( m );
+ printques(m);
#endif
local_irq_restore(flags);
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff