401 lines
9.1 KiB
C
Executable File
401 lines
9.1 KiB
C
Executable File
/*
|
|
* Copyright (C) 2011 Samsung Electronics.
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
#include "gnss_prj.h"
|
|
#include "gnss_link_device_memory.h"
|
|
|
|
void gnss_msq_reset(struct mem_status_queue *msq)
|
|
{
|
|
unsigned long flags;
|
|
spin_lock_irqsave(&msq->lock, flags);
|
|
msq->out = msq->in;
|
|
spin_unlock_irqrestore(&msq->lock, flags);
|
|
}
|
|
|
|
/**
|
|
* gnss_msq_get_free_slot
|
|
* @trq : pointer to an instance of mem_status_queue structure
|
|
*
|
|
* Succeeds always by dropping the oldest slot if a "msq" is full.
|
|
*/
|
|
struct mem_status *gnss_msq_get_free_slot(struct mem_status_queue *msq)
|
|
{
|
|
int qsize = MAX_MEM_LOG_CNT;
|
|
int in;
|
|
int out;
|
|
unsigned long flags;
|
|
struct mem_status *stat;
|
|
|
|
spin_lock_irqsave(&msq->lock, flags);
|
|
|
|
in = msq->in;
|
|
out = msq->out;
|
|
|
|
if (circ_get_space(qsize, in, out) < 1) {
|
|
/* Make the oldest slot empty */
|
|
out++;
|
|
msq->out = (out == qsize) ? 0 : out;
|
|
}
|
|
|
|
/* Get a free slot */
|
|
stat = &msq->stat[in];
|
|
|
|
/* Make it as "data" slot */
|
|
in++;
|
|
msq->in = (in == qsize) ? 0 : in;
|
|
|
|
spin_unlock_irqrestore(&msq->lock, flags);
|
|
|
|
return stat;
|
|
}
|
|
|
|
struct mem_status *gnss_msq_get_data_slot(struct mem_status_queue *msq)
|
|
{
|
|
int qsize = MAX_MEM_LOG_CNT;
|
|
int in;
|
|
int out;
|
|
unsigned long flags;
|
|
struct mem_status *stat;
|
|
|
|
spin_lock_irqsave(&msq->lock, flags);
|
|
|
|
in = msq->in;
|
|
out = msq->out;
|
|
|
|
if (in == out) {
|
|
stat = NULL;
|
|
goto exit;
|
|
}
|
|
|
|
/* Get a data slot */
|
|
stat = &msq->stat[out];
|
|
|
|
/* Make it "free" slot */
|
|
out++;
|
|
msq->out = (out == qsize) ? 0 : out;
|
|
|
|
exit:
|
|
spin_unlock_irqrestore(&msq->lock, flags);
|
|
return stat;
|
|
}
|
|
|
|
/**
|
|
* gnss_memcpy16_from_io
|
|
* @to: pointer to "real" memory
|
|
* @from: pointer to IO memory
|
|
* @count: data length in bytes to be copied
|
|
*
|
|
* Copies data from IO memory space to "real" memory space.
|
|
*/
|
|
void gnss_memcpy16_from_io(const void *to, const void __iomem *from, u32 count)
|
|
{
|
|
u16 *d = (u16 *)to;
|
|
u16 *s = (u16 *)from;
|
|
u32 words = count >> 1;
|
|
while (words--)
|
|
*d++ = ioread16(s++);
|
|
}
|
|
|
|
/**
|
|
* gnss_memcpy16_to_io
|
|
* @to: pointer to IO memory
|
|
* @from: pointer to "real" memory
|
|
* @count: data length in bytes to be copied
|
|
*
|
|
* Copies data from "real" memory space to IO memory space.
|
|
*/
|
|
void gnss_memcpy16_to_io(const void __iomem *to, const void *from, u32 count)
|
|
{
|
|
u16 *d = (u16 *)to;
|
|
u16 *s = (u16 *)from;
|
|
u32 words = count >> 1;
|
|
while (words--)
|
|
iowrite16(*s++, d++);
|
|
}
|
|
|
|
/**
|
|
* gnss_memcmp16_to_io
|
|
* @to: pointer to IO memory
|
|
* @from: pointer to "real" memory
|
|
* @count: data length in bytes to be compared
|
|
*
|
|
* Compares data from "real" memory space to IO memory space.
|
|
*/
|
|
int gnss_memcmp16_to_io(const void __iomem *to, const void *from, u32 count)
|
|
{
|
|
u16 *d = (u16 *)to;
|
|
u16 *s = (u16 *)from;
|
|
int words = count >> 1;
|
|
int diff = 0;
|
|
int i;
|
|
u16 d1;
|
|
u16 s1;
|
|
|
|
for (i = 0; i < words; i++) {
|
|
d1 = ioread16(d);
|
|
s1 = *s;
|
|
if (d1 != s1) {
|
|
diff++;
|
|
gif_err("ERR! [%d] d:0x%04X != s:0x%04X\n", i, d1, s1);
|
|
}
|
|
d++;
|
|
s++;
|
|
}
|
|
|
|
return diff;
|
|
}
|
|
|
|
/**
|
|
* gnss_circ_read16_from_io
|
|
* @dst: start address of the destination buffer
|
|
* @src: start address of the buffer in a circular queue
|
|
* @qsize: size of the circular queue
|
|
* @out: offset to read
|
|
* @len: length of data to be read
|
|
*
|
|
* Should be invoked after checking data length
|
|
*/
|
|
void gnss_circ_read16_from_io(void *dst, void *src, u32 qsize, u32 out, u32 len)
|
|
{
|
|
if ((out + len) <= qsize) {
|
|
/* ----- (out) (in) ----- */
|
|
/* ----- 7f 00 00 7e ----- */
|
|
gnss_memcpy16_from_io(dst, (src + out), len);
|
|
} else {
|
|
/* (in) ----------- (out) */
|
|
/* 00 7e ----------- 7f 00 */
|
|
unsigned len1 = qsize - out;
|
|
|
|
/* 1) data start (out) ~ buffer end */
|
|
gnss_memcpy16_from_io(dst, (src + out), len1);
|
|
|
|
/* 2) buffer start ~ data end (in - 1) */
|
|
gnss_memcpy16_from_io((dst + len1), src, (len - len1));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gnss_circ_write16_to_io
|
|
* @dst: pointer to the start of the circular queue
|
|
* @src: pointer to the source
|
|
* @qsize: size of the circular queue
|
|
* @in: offset to write
|
|
* @len: length of data to be written
|
|
*
|
|
* Should be invoked after checking free space
|
|
*/
|
|
void gnss_circ_write16_to_io(void *dst, void *src, u32 qsize, u32 in, u32 len)
|
|
{
|
|
u32 space;
|
|
|
|
if ((in + len) < qsize) {
|
|
/* (in) ----------- (out) */
|
|
/* 00 7e ----------- 7f 00 */
|
|
gnss_memcpy16_to_io((dst + in), src, len);
|
|
} else {
|
|
/* ----- (out) (in) ----- */
|
|
/* ----- 7f 00 00 7e ----- */
|
|
|
|
/* 1) space start (in) ~ buffer end */
|
|
space = qsize - in;
|
|
gnss_memcpy16_to_io((dst + in), src, ((len > space) ? space : len));
|
|
|
|
/* 2) buffer start ~ data end */
|
|
if (len > space)
|
|
gnss_memcpy16_to_io(dst, (src + space), (len - space));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gnss_copy_circ_to_user
|
|
* @dst: start address of the destination buffer
|
|
* @src: start address of the buffer in a circular queue
|
|
* @qsize: size of the circular queue
|
|
* @out: offset to read
|
|
* @len: length of data to be read
|
|
*
|
|
* Should be invoked after checking data length
|
|
*/
|
|
int gnss_copy_circ_to_user(void __user *dst, void *src, u32 qsize, u32 out, u32 len)
|
|
{
|
|
if ((out + len) <= qsize) {
|
|
/* ----- (out) (in) ----- */
|
|
/* ----- 7f 00 00 7e ----- */
|
|
if (copy_to_user(dst, (src + out), len)) {
|
|
gif_err("ERR! <called by %pf> copy_to_user fail\n",
|
|
CALLER);
|
|
return -EFAULT;
|
|
}
|
|
} else {
|
|
/* (in) ----------- (out) */
|
|
/* 00 7e ----------- 7f 00 */
|
|
unsigned len1 = qsize - out;
|
|
|
|
/* 1) data start (out) ~ buffer end */
|
|
if (copy_to_user(dst, (src + out), len1)) {
|
|
gif_err("ERR! <called by %pf> copy_to_user fail\n",
|
|
CALLER);
|
|
return -EFAULT;
|
|
}
|
|
|
|
/* 2) buffer start ~ data end (in?) */
|
|
if (copy_to_user((dst + len1), src, (len - len1))) {
|
|
gif_err("ERR! <called by %pf> copy_to_user fail\n",
|
|
CALLER);
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gnss_copy_user_to_circ
|
|
* @dst: pointer to the start of the circular queue
|
|
* @src: pointer to the source
|
|
* @qsize: size of the circular queue
|
|
* @in: offset to write
|
|
* @len: length of data to be written
|
|
*
|
|
* Should be invoked after checking free space
|
|
*/
|
|
int gnss_copy_user_to_circ(void *dst, void __user *src, u32 qsize, u32 in, u32 len)
|
|
{
|
|
u32 space;
|
|
u32 len1;
|
|
|
|
if ((in + len) < qsize) {
|
|
/* (in) ----------- (out) */
|
|
/* 00 7e ----------- 7f 00 */
|
|
if (copy_from_user((dst + in), src, len)) {
|
|
gif_err("ERR! <called by %pf> copy_from_user fail\n",
|
|
CALLER);
|
|
return -EFAULT;
|
|
}
|
|
} else {
|
|
/* ----- (out) (in) ----- */
|
|
/* ----- 7f 00 00 7e ----- */
|
|
|
|
/* 1) space start (in) ~ buffer end */
|
|
space = qsize - in;
|
|
len1 = (len > space) ? space : len;
|
|
if (copy_from_user((dst + in), src, len1)) {
|
|
gif_err("ERR! <called by %pf> copy_from_user fail\n",
|
|
CALLER);
|
|
return -EFAULT;
|
|
}
|
|
|
|
/* 2) buffer start ~ data end */
|
|
if (len > len1) {
|
|
if (copy_from_user(dst, (src + space), (len - len1))) {
|
|
gif_err("ERR! <called by %pf> copy_from_user fail\n",
|
|
CALLER);
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gnss_capture_mem_dump
|
|
* @ld: pointer to an instance of link_device structure
|
|
* @base: base virtual address to a memory interface medium
|
|
* @size: size of the memory interface medium
|
|
*
|
|
* Captures a dump for a memory interface medium.
|
|
*
|
|
* Returns the pointer to a memory dump buffer.
|
|
*/
|
|
u8 *gnss_capture_mem_dump(struct link_device *ld, u8 *base, u32 size)
|
|
{
|
|
u8 *buff = kzalloc(size, GFP_ATOMIC);
|
|
if (!buff) {
|
|
gif_err("%s: ERR! kzalloc(%d) fail\n", ld->name, size);
|
|
return NULL;
|
|
} else {
|
|
gnss_memcpy16_from_io(buff, base, size);
|
|
return buff;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gnss_trq_get_free_slot
|
|
* @trq : pointer to an instance of trace_data_queue structure
|
|
*
|
|
* Succeeds always by dropping the oldest slot if a "trq" is full.
|
|
*/
|
|
struct trace_data *gnss_trq_get_free_slot(struct trace_data_queue *trq)
|
|
{
|
|
int qsize = MAX_TRACE_SIZE;
|
|
int in;
|
|
int out;
|
|
unsigned long flags;
|
|
struct trace_data *trd;
|
|
|
|
spin_lock_irqsave(&trq->lock, flags);
|
|
|
|
in = trq->in;
|
|
out = trq->out;
|
|
|
|
/* The oldest slot can be dropped. */
|
|
if (circ_get_space(qsize, in, out) < 1) {
|
|
/* Free the data buffer in the oldest slot */
|
|
trd = &trq->trd[out];
|
|
kfree(trd->data);
|
|
|
|
/* Make the oldest slot empty */
|
|
out++;
|
|
trq->out = (out == qsize) ? 0 : out;
|
|
}
|
|
|
|
/* Get a free slot and make it occupied */
|
|
trd = &trq->trd[in++];
|
|
trq->in = (in == qsize) ? 0 : in;
|
|
|
|
spin_unlock_irqrestore(&trq->lock, flags);
|
|
|
|
memset(trd, 0, sizeof(struct trace_data));
|
|
|
|
return trd;
|
|
}
|
|
|
|
struct trace_data *gnss_trq_get_data_slot(struct trace_data_queue *trq)
|
|
{
|
|
int qsize = MAX_TRACE_SIZE;
|
|
int in;
|
|
int out;
|
|
unsigned long flags;
|
|
struct trace_data *trd;
|
|
|
|
spin_lock_irqsave(&trq->lock, flags);
|
|
|
|
in = trq->in;
|
|
out = trq->out;
|
|
|
|
if (circ_get_usage(qsize, in, out) < 1) {
|
|
spin_unlock_irqrestore(&trq->lock, flags);
|
|
return NULL;
|
|
}
|
|
|
|
/* Get a data slot and make it empty */
|
|
trd = &trq->trd[out++];
|
|
trq->out = (out == qsize) ? 0 : out;
|
|
|
|
spin_unlock_irqrestore(&trq->lock, flags);
|
|
|
|
return trd;
|
|
}
|