#include <linux/kernel.h>
#include <linux/mmiotrace.h>
+#include <linux/pci.h>
#include "trace.h"
+struct header_iter {
+ struct pci_dev *dev;
+};
+
static struct trace_array *mmio_trace_array;
+static bool overrun_detected;
static void mmio_reset_data(struct trace_array *tr)
{
int cpu;
+ overrun_detected = false;
tr->time_start = ftrace_now(tr->cpu);
for_each_online_cpu(cpu)
}
}
-/* XXX: This is not called for trace_pipe file! */
-void mmio_print_header(struct trace_iterator *iter)
+static int mmio_print_pcidev(struct trace_seq *s, const struct pci_dev *dev)
{
+ int ret = 0;
+ int i;
+ resource_size_t start, end;
+ const struct pci_driver *drv = pci_dev_driver(dev);
+
+ /* XXX: incomplete checks for trace_seq_printf() return value */
+ ret += trace_seq_printf(s, "PCIDEV %02x%02x %04x%04x %x",
+ dev->bus->number, dev->devfn,
+ dev->vendor, dev->device, dev->irq);
+ /*
+ * XXX: is pci_resource_to_user() appropriate, since we are
+ * supposed to interpret the __ioremap() phys_addr argument based on
+ * these printed values?
+ */
+ for (i = 0; i < 7; i++) {
+ pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
+ ret += trace_seq_printf(s, " %llx",
+ (unsigned long long)(start |
+ (dev->resource[i].flags & PCI_REGION_FLAG_MASK)));
+ }
+ for (i = 0; i < 7; i++) {
+ pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
+ ret += trace_seq_printf(s, " %llx",
+ dev->resource[i].start < dev->resource[i].end ?
+ (unsigned long long)(end - start) + 1 : 0);
+ }
+ if (drv)
+ ret += trace_seq_printf(s, " %s\n", drv->name);
+ else
+ ret += trace_seq_printf(s, " \n");
+ return ret;
+}
+
+static void destroy_header_iter(struct header_iter *hiter)
+{
+ if (!hiter)
+ return;
+ pci_dev_put(hiter->dev);
+ kfree(hiter);
+}
+
+static void mmio_pipe_open(struct trace_iterator *iter)
+{
+ struct header_iter *hiter;
struct trace_seq *s = &iter->seq;
- trace_seq_printf(s, "VERSION broken 20070824\n");
- /* TODO: print /proc/bus/pci/devices contents as PCIDEV lines */
+
+ trace_seq_printf(s, "VERSION 20070824\n");
+
+ hiter = kzalloc(sizeof(*hiter), GFP_KERNEL);
+ if (!hiter)
+ return;
+
+ hiter->dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
+ iter->private = hiter;
+}
+
+/* XXX: This is not called when the pipe is closed! */
+static void mmio_close(struct trace_iterator *iter)
+{
+ struct header_iter *hiter = iter->private;
+ destroy_header_iter(hiter);
+ iter->private = NULL;
+}
+
+static unsigned long count_overruns(struct trace_iterator *iter)
+{
+ int cpu;
+ unsigned long cnt = 0;
+ for_each_online_cpu(cpu) {
+ cnt += iter->overrun[cpu];
+ iter->overrun[cpu] = 0;
+ }
+ return cnt;
+}
+
+static ssize_t mmio_read(struct trace_iterator *iter, struct file *filp,
+ char __user *ubuf, size_t cnt, loff_t *ppos)
+{
+ ssize_t ret;
+ struct header_iter *hiter = iter->private;
+ struct trace_seq *s = &iter->seq;
+ unsigned long n;
+
+ n = count_overruns(iter);
+ if (n) {
+ /* XXX: This is later than where events were lost. */
+ trace_seq_printf(s, "MARK 0.000000 Lost %lu events.\n", n);
+ if (!overrun_detected)
+ pr_warning("mmiotrace has lost events.\n");
+ overrun_detected = true;
+ goto print_out;
+ }
+
+ if (!hiter)
+ return 0;
+
+ mmio_print_pcidev(s, hiter->dev);
+ hiter->dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, hiter->dev);
+
+ if (!hiter->dev) {
+ destroy_header_iter(hiter);
+ iter->private = NULL;
+ }
+
+print_out:
+ ret = trace_seq_to_user(s, ubuf, cnt);
+ return (ret == -EBUSY) ? 0 : ret;
}
static int mmio_print_rw(struct trace_iterator *iter)
switch (entry->mmiorw.opcode) {
case MMIO_READ:
ret = trace_seq_printf(s,
- "R %d %lu.%06lu %d 0x%lx 0x%lx 0x%lx %d\n",
- rw->width, secs, usec_rem, rw->map_id, rw->phys,
- rw->value, rw->pc, entry->pid);
+ "R %d %lu.%06lu %d 0x%llx 0x%lx 0x%lx %d\n",
+ rw->width, secs, usec_rem, rw->map_id,
+ (unsigned long long)rw->phys,
+ rw->value, rw->pc, 0);
break;
case MMIO_WRITE:
ret = trace_seq_printf(s,
- "W %d %lu.%06lu %d 0x%lx 0x%lx 0x%lx %d\n",
- rw->width, secs, usec_rem, rw->map_id, rw->phys,
- rw->value, rw->pc, entry->pid);
+ "W %d %lu.%06lu %d 0x%llx 0x%lx 0x%lx %d\n",
+ rw->width, secs, usec_rem, rw->map_id,
+ (unsigned long long)rw->phys,
+ rw->value, rw->pc, 0);
break;
case MMIO_UNKNOWN_OP:
ret = trace_seq_printf(s,
- "UNKNOWN %lu.%06lu %d 0x%lx %02x,%02x,%02x 0x%lx %d\n",
- secs, usec_rem, rw->map_id, rw->phys,
+ "UNKNOWN %lu.%06lu %d 0x%llx %02x,%02x,%02x 0x%lx %d\n",
+ secs, usec_rem, rw->map_id,
+ (unsigned long long)rw->phys,
(rw->value >> 16) & 0xff, (rw->value >> 8) & 0xff,
- (rw->value >> 0) & 0xff, rw->pc, entry->pid);
+ (rw->value >> 0) & 0xff, rw->pc, 0);
break;
default:
ret = trace_seq_printf(s, "rw what?\n");
switch (entry->mmiorw.opcode) {
case MMIO_PROBE:
ret = trace_seq_printf(s,
- "MAP %lu.%06lu %d 0x%lx 0x%lx 0x%lx 0x%lx %d\n",
- secs, usec_rem, m->map_id, m->phys, m->virt, m->len,
- 0UL, entry->pid);
+ "MAP %lu.%06lu %d 0x%llx 0x%lx 0x%lx 0x%lx %d\n",
+ secs, usec_rem, m->map_id,
+ (unsigned long long)m->phys, m->virt, m->len,
+ 0UL, 0);
break;
case MMIO_UNPROBE:
ret = trace_seq_printf(s,
"UNMAP %lu.%06lu %d 0x%lx %d\n",
- secs, usec_rem, m->map_id, 0UL, entry->pid);
+ secs, usec_rem, m->map_id, 0UL, 0);
break;
default:
ret = trace_seq_printf(s, "map what?\n");
.name = "mmiotrace",
.init = mmio_trace_init,
.reset = mmio_trace_reset,
- .open = mmio_print_header,
+ .pipe_open = mmio_pipe_open,
+ .close = mmio_close,
+ .read = mmio_read,
.ctrl_update = mmio_trace_ctrl_update,
.print_line = mmio_print_line,
};
projects / linux-2.6-omap-h63xx.git / blobdiff