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/* Copyright (c) 2012, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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 "kgsl.h"
#include "kgsl_device.h"
#include "z180.h"
#include "z180_reg.h"
#define Z180_STREAM_PACKET_CALL 0x7C000275
/* Postmortem Dump formatted Output parameters */
/* Number of Words per dump data line */
#define WORDS_PER_LINE 8
/* Number of spaces per dump data line */
#define NUM_SPACES (WORDS_PER_LINE - 1)
/*
* Output dump data is formatted as string, hence number of chars
* per line for line string allocation
*/
#define CHARS_PER_LINE \
((WORDS_PER_LINE * (2*sizeof(unsigned int))) + NUM_SPACES + 1)
/* Z180 registers (byte offsets) to be dumped */
static const unsigned int regs_to_dump[] = {
ADDR_VGC_VERSION,
ADDR_VGC_SYSSTATUS,
ADDR_VGC_IRQSTATUS,
ADDR_VGC_IRQENABLE,
ADDR_VGC_IRQ_ACTIVE_CNT,
ADDR_VGC_CLOCKEN,
ADDR_VGC_MH_DATA_ADDR,
ADDR_VGC_GPR0,
ADDR_VGC_GPR1,
ADDR_VGC_BUSYCNT,
ADDR_VGC_FIFOFREE,
};
/**
* z180_dump_regs - Dumps all of Z180 external registers. Prints the word offset
* of the register in each output line.
* @device: kgsl_device pointer to the Z180 core
*/
static void z180_dump_regs(struct kgsl_device *device)
{
unsigned int i;
unsigned int reg_val;
z180_idle(device);
KGSL_LOG_DUMP(device, "Z180 Register Dump\n");
for (i = 0; i < ARRAY_SIZE(regs_to_dump); i++) {
kgsl_regread(device,
regs_to_dump[i]/sizeof(unsigned int), ®_val);
KGSL_LOG_DUMP(device, "REG: %04X: %08X\n",
regs_to_dump[i]/sizeof(unsigned int), reg_val);
}
}
/**
* z180_dump_ringbuffer - Dumps the Z180 core's ringbuffer contents
* @device: kgsl_device pointer to the z180 core
*/
static void z180_dump_ringbuffer(struct kgsl_device *device)
{
unsigned int rb_size;
unsigned int *rb_hostptr;
unsigned int rb_words;
unsigned int rb_gpuaddr;
struct z180_device *z180_dev = Z180_DEVICE(device);
unsigned int i;
char linebuf[CHARS_PER_LINE];
KGSL_LOG_DUMP(device, "Z180 ringbuffer dump\n");
rb_hostptr = (unsigned int *) z180_dev->ringbuffer.cmdbufdesc.hostptr;
rb_size = Z180_RB_SIZE;
rb_gpuaddr = z180_dev->ringbuffer.cmdbufdesc.gpuaddr;
rb_words = rb_size/sizeof(unsigned int);
KGSL_LOG_DUMP(device, "ringbuffer size: %u\n", rb_size);
KGSL_LOG_DUMP(device, "rb_words: %d\n", rb_words);
for (i = 0; i < rb_words; i += WORDS_PER_LINE) {
hex_dump_to_buffer(rb_hostptr+i,
rb_size - i*sizeof(unsigned int),
WORDS_PER_LINE*sizeof(unsigned int),
sizeof(unsigned int), linebuf,
sizeof(linebuf), false);
KGSL_LOG_DUMP(device, "RB: %04X: %s\n",
rb_gpuaddr + i*sizeof(unsigned int), linebuf);
}
}
static void z180_dump_ib(struct kgsl_device *device)
{
unsigned int rb_size;
unsigned int *rb_hostptr;
unsigned int rb_words;
unsigned int rb_gpuaddr;
unsigned int ib_gpuptr = 0;
unsigned int ib_size = 0;
void *ib_hostptr = NULL;
int rb_slot_num = -1;
struct z180_device *z180_dev = Z180_DEVICE(device);
struct kgsl_mem_entry *entry = NULL;
phys_addr_t pt_base;
unsigned int i;
unsigned int j;
char linebuf[CHARS_PER_LINE];
unsigned int current_ib_slot;
unsigned int len;
unsigned int rowsize;
KGSL_LOG_DUMP(device, "Z180 IB dump\n");
rb_hostptr = (unsigned int *) z180_dev->ringbuffer.cmdbufdesc.hostptr;
rb_size = Z180_RB_SIZE;
rb_gpuaddr = z180_dev->ringbuffer.cmdbufdesc.gpuaddr;
rb_words = rb_size/sizeof(unsigned int);
KGSL_LOG_DUMP(device, "Ringbuffer size (bytes): %u\n", rb_size);
KGSL_LOG_DUMP(device, "rb_words: %d\n", rb_words);
pt_base = kgsl_mmu_get_current_ptbase(&device->mmu);
/* Dump the current IB */
for (i = 0; i < rb_words; i++) {
if (rb_hostptr[i] == Z180_STREAM_PACKET_CALL) {
rb_slot_num++;
current_ib_slot =
z180_dev->current_timestamp % Z180_PACKET_COUNT;
if (rb_slot_num != current_ib_slot)
continue;
ib_gpuptr = rb_hostptr[i+1];
entry = kgsl_get_mem_entry(device, pt_base, ib_gpuptr,
1);
if (entry == NULL) {
KGSL_LOG_DUMP(device,
"IB mem entry not found for ringbuffer slot#: %d\n",
rb_slot_num);
continue;
}
ib_hostptr = kgsl_memdesc_map(&entry->memdesc);
if (ib_hostptr == NULL) {
KGSL_LOG_DUMP(device,
"Could not map IB to kernel memory, Ringbuffer Slot: %d\n",
rb_slot_num);
kgsl_mem_entry_put(entry);
continue;
}
ib_size = entry->memdesc.size;
KGSL_LOG_DUMP(device,
"IB size: %dbytes, IB size in words: %d\n",
ib_size,
ib_size/sizeof(unsigned int));
for (j = 0; j < ib_size; j += WORDS_PER_LINE) {
len = ib_size - j*sizeof(unsigned int);
rowsize = WORDS_PER_LINE*sizeof(unsigned int);
hex_dump_to_buffer(ib_hostptr+j, len, rowsize,
sizeof(unsigned int), linebuf,
sizeof(linebuf), false);
KGSL_LOG_DUMP(device, "IB%d: %04X: %s\n",
rb_slot_num,
(rb_gpuaddr +
j*sizeof(unsigned int)),
linebuf);
}
KGSL_LOG_DUMP(device, "IB Dump Finished\n");
kgsl_mem_entry_put(entry);
}
}
}
/**
* z180_dump - Dumps the Z180 ringbuffer and registers (and IBs if asked for)
* for postmortem
* analysis.
* @device: kgsl_device pointer to the Z180 core
*/
int z180_dump(struct kgsl_device *device, int manual)
{
struct z180_device *z180_dev = Z180_DEVICE(device);
mb();
KGSL_LOG_DUMP(device, "Retired Timestamp: %d\n", z180_dev->timestamp);
KGSL_LOG_DUMP(device,
"Current Timestamp: %d\n", z180_dev->current_timestamp);
/* Dump ringbuffer */
z180_dump_ringbuffer(device);
/* Dump registers */
z180_dump_regs(device);
/* Dump IBs, if asked for */
if (device->pm_ib_enabled)
z180_dump_ib(device);
/* Get the stack trace if the dump was automatic */
if (!manual)
BUG_ON(1);
return 0;
}
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