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);
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);
}
}
}
void *adreno_snapshot(struct kgsl_device *device, void *snapshot, int *remain,
int hang)
{
int i;
uint32_t ptbase, ibbase, ibsize;
struct adreno_device *adreno_dev = ADRENO_DEVICE(device);
/* Reset the list of objects */
objbufptr = 0;
/* Get the physical address of the MMU pagetable */
ptbase = kgsl_mmu_get_current_ptbase(device);
/* Dump the ringbuffer */
snapshot = kgsl_snapshot_add_section(device, KGSL_SNAPSHOT_SECTION_RB,
snapshot, remain, snapshot_rb, NULL);
/*
* Make sure that the last IB1 that was being executed is dumped.
* Since this was the last IB1 that was processed, we should have
* already added it to the list during the ringbuffer parse but we
* want to be double plus sure.
*/
kgsl_regread(device, REG_CP_IB1_BASE, &ibbase);
kgsl_regread(device, REG_CP_IB1_BUFSZ, &ibsize);
/*
* The problem is that IB size from the register is the unprocessed size
* of the buffer not the original size, so if we didn't catch this
* buffer being directly used in the RB, then we might not be able to
* dump the whle thing. Print a warning message so we can try to
* figure how often this really happens.
*/
if (!find_object(SNAPSHOT_OBJ_TYPE_IB, ibbase, ptbase) && ibsize) {
push_object(device, SNAPSHOT_OBJ_TYPE_IB, ptbase,
ibbase, ibsize);
KGSL_DRV_ERR(device, "CP_IB1_BASE not found in the ringbuffer. "
"Dumping %x dwords of the buffer.\n", ibsize);
}
kgsl_regread(device, REG_CP_IB2_BASE, &ibbase);
kgsl_regread(device, REG_CP_IB2_BUFSZ, &ibsize);
/*
* Add the last parsed IB2 to the list. The IB2 should be found as we
* parse the objects below, but we try to add it to the list first, so
* it too can be parsed. Don't print an error message in this case - if
* the IB2 is found during parsing, the list will be updated with the
* correct size.
*/
if (!find_object(SNAPSHOT_OBJ_TYPE_IB, ibbase, ptbase) && ibsize) {
push_object(device, SNAPSHOT_OBJ_TYPE_IB, ptbase,
ibbase, ibsize);
}
/*
* Go through the list of found objects and dump each one. As the IBs
* are parsed, more objects might be found, and objbufptr will increase
*/
for (i = 0; i < objbufptr; i++)
snapshot = dump_object(device, i, snapshot, remain);
/*
* Only dump the istore on a hang - reading it on a running system
* has a non 0 chance of hanging the GPU
*/
if (hang) {
snapshot = kgsl_snapshot_add_section(device,
KGSL_SNAPSHOT_SECTION_ISTORE, snapshot, remain,
snapshot_istore, NULL);
}
/* Add GPU specific sections - registers mainly, but other stuff too */
if (adreno_dev->gpudev->snapshot)
snapshot = adreno_dev->gpudev->snapshot(adreno_dev, snapshot,
remain, hang);
return snapshot;
}
/* Snapshot the Linux specific information */
static int snapshot_os(struct kgsl_device *device,
void *snapshot, int remain, void *priv)
{
struct kgsl_snapshot_linux *header = snapshot;
struct kgsl_pwrctrl *pwr = &device->pwrctrl;
struct task_struct *task;
pid_t pid;
int hang = (int) priv;
int ctxtcount = 0;
int size = sizeof(*header);
/* Figure out how many active contexts there are - these will
* be appended on the end of the structure */
idr_for_each(&device->context_idr, snapshot_context_count, &ctxtcount);
size += ctxtcount * sizeof(struct kgsl_snapshot_linux_context);
/* Make sure there is enough room for the data */
if (remain < size) {
SNAPSHOT_ERR_NOMEM(device, "OS");
return 0;
}
memset(header, 0, sizeof(*header));
header->osid = KGSL_SNAPSHOT_OS_LINUX;
header->state = hang ? SNAPSHOT_STATE_HUNG : SNAPSHOT_STATE_RUNNING;
/* Get the kernel build information */
strlcpy(header->release, utsname()->release, sizeof(header->release));
strlcpy(header->version, utsname()->version, sizeof(header->version));
/* Get the Unix time for the timestamp */
header->seconds = get_seconds();
/* Remember the power information */
header->power_flags = pwr->power_flags;
header->power_level = pwr->active_pwrlevel;
header->power_interval_timeout = pwr->interval_timeout;
header->grpclk = kgsl_get_clkrate(pwr->grp_clks[0]);
header->busclk = kgsl_get_clkrate(pwr->ebi1_clk);
/* Future proof for per-context timestamps */
header->current_context = -1;
/* Get the current PT base */
header->ptbase = kgsl_mmu_get_current_ptbase(device);
/* And the PID for the task leader */
pid = header->pid = kgsl_mmu_get_ptname_from_ptbase(header->ptbase);
task = find_task_by_vpid(pid);
if (task)
get_task_comm(header->comm, task);
header->ctxtcount = ctxtcount;
/* append information for each context */
_ctxtptr = snapshot + sizeof(*header);
idr_for_each(&device->context_idr, snapshot_context_info, NULL);
/* Return the size of the data segment */
return size;
}
/* Snapshot the ringbuffer memory */
static int snapshot_rb(struct kgsl_device *device, void *snapshot,
int remain, void *priv)
{
struct kgsl_snapshot_rb *header = snapshot;
unsigned int *data = snapshot + sizeof(*header);
struct adreno_device *adreno_dev = ADRENO_DEVICE(device);
struct adreno_ringbuffer *rb = &adreno_dev->ringbuffer;
unsigned int rbbase, ptbase, rptr, *rbptr;
int start, stop, index;
int numitems, size;
int parse_ibs = 0, ib_parse_start;
/* Get the GPU address of the ringbuffer */
kgsl_regread(device, REG_CP_RB_BASE, &rbbase);
/* Get the physical address of the MMU pagetable */
ptbase = kgsl_mmu_get_current_ptbase(device);
/* Get the current read pointers for the RB */
kgsl_regread(device, REG_CP_RB_RPTR, &rptr);
/* start the dump at the rptr minus some history */
start = (int) rptr - NUM_DWORDS_OF_RINGBUFFER_HISTORY;
if (start < 0)
start += rb->sizedwords;
/*
* Stop the dump at the point where the software last wrote. Don't use
* the hardware value here on the chance that it didn't get properly
* updated
*/
stop = (int) rb->wptr + 16;
if (stop > rb->sizedwords)
stop -= rb->sizedwords;
/* Set up the header for the section */
numitems = (stop > start) ? stop - start :
(rb->sizedwords - start) + stop;
size = (numitems << 2);
if (remain < size + sizeof(*header)) {
KGSL_DRV_ERR(device,
"snapshot: Not enough memory for the rb section");
return 0;
}
/* Write the sub-header for the section */
header->start = start;
header->end = stop;
header->wptr = rb->wptr;
header->rbsize = rb->sizedwords;
header->count = numitems;
/*
* We can only reliably dump IBs from the beginning of the context,
* and it turns out that for the vast majority of the time we really
* only care about the current context when it comes to diagnosing
* a hang. So, with an eye to limiting the buffer dumping to what is
* really useful find the beginning of the context and only dump
* IBs from that point
*/
index = rptr;
ib_parse_start = start;
rbptr = rb->buffer_desc.hostptr;
while (index != start) {
index--;
if (index < 0) {
/*
* The marker we are looking for is 2 dwords long, so
* when wrapping, go back 2 from the end so we don't
* access out of range in the if statement below
*/
index = rb->sizedwords - 2;
/*
* Account for the possibility that start might be at
* rb->sizedwords - 1
*/
if (start == rb->sizedwords - 1)
break;
}
/*
* Look for a NOP packet with the context switch identifier in
* the second dword
*/
if (rbptr[index] == cp_nop_packet(1) &&
rbptr[index + 1] == KGSL_CONTEXT_TO_MEM_IDENTIFIER) {
ib_parse_start = index;
break;
}
}
index = start;
/*
* Loop through the RB, copying the data and looking for indirect
* buffers and MMU pagetable changes
*/
while (index != rb->wptr) {
*data = rbptr[index];
/* Only parse IBs between the context start and the rptr */
if (index == ib_parse_start)
parse_ibs = 1;
if (index == rptr)
parse_ibs = 0;
if (parse_ibs && adreno_cmd_is_ib(rbptr[index]))
push_object(device, SNAPSHOT_OBJ_TYPE_IB, ptbase,
rbptr[index + 1], rbptr[index + 2]);
index = index + 1;
if (index == rb->sizedwords)
index = 0;
data++;
}
/* Dump 16 dwords past the wptr, but don't bother interpeting it */
while (index != stop) {
*data = rbptr[index];
index = index + 1;
if (index == rb->sizedwords)
index = 0;
data++;
}
/* Return the size of the section */
return size + sizeof(*header);
}
