* cx18 mailbox functions
*
* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
+ * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include "cx18-mailbox.h"
#include "cx18-queue.h"
#include "cx18-streams.h"
+#include "cx18-alsa-pcm.h" /* FIXME make configurable */
static const char *rpu_str[] = { "APU", "CPU", "EPU", "HPU" };
API_ENTRY(CPU, CX18_CPU_GET_ENC_PTS, 0),
API_ENTRY(CPU, CX18_CPU_DE_SET_MDL_ACK, 0),
API_ENTRY(CPU, CX18_CPU_DE_SET_MDL, API_FAST),
- API_ENTRY(CPU, CX18_APU_RESETAI, API_FAST),
API_ENTRY(CPU, CX18_CPU_DE_RELEASE_MDL, API_SLOW),
+ API_ENTRY(APU, CX18_APU_START, 0),
+ API_ENTRY(APU, CX18_APU_STOP, 0),
+ API_ENTRY(APU, CX18_APU_RESETAI, 0),
+ API_ENTRY(CPU, CX18_CPU_DEBUG_PEEK32, 0),
API_ENTRY(0, 0, 0),
};
return NULL;
}
-static void dump_mb(struct cx18 *cx, struct cx18_mailbox *mb, char *name)
+/* Call with buf of n*11+1 bytes */
+static char *u32arr2hex(u32 data[], int n, char *buf)
{
- char argstr[MAX_MB_ARGUMENTS*11+1];
char *p;
int i;
+ for (i = 0, p = buf; i < n; i++, p += 11) {
+ /* kernel snprintf() appends '\0' always */
+ snprintf(p, 12, " %#010x", data[i]);
+ }
+ *p = '\0';
+ return buf;
+}
+
+static void dump_mb(struct cx18 *cx, struct cx18_mailbox *mb, char *name)
+{
+ char argstr[MAX_MB_ARGUMENTS*11+1];
+
if (!(cx18_debug & CX18_DBGFLG_API))
return;
- for (i = 0, p = argstr; i < MAX_MB_ARGUMENTS; i++, p += 11) {
- /* kernel snprintf() appends '\0' always */
- snprintf(p, 12, " %#010x", mb->args[i]);
- }
CX18_DEBUG_API("%s: req %#010x ack %#010x cmd %#010x err %#010x args%s"
- "\n", name, mb->request, mb->ack, mb->cmd, mb->error, argstr);
+ "\n", name, mb->request, mb->ack, mb->cmd, mb->error,
+ u32arr2hex(mb->args, MAX_MB_ARGUMENTS, argstr));
}
* Functions that run in a work_queue work handling context
*/
-static void epu_dma_done(struct cx18 *cx, struct cx18_epu_work_order *order)
+static void cx18_mdl_send_to_dvb(struct cx18_stream *s, struct cx18_mdl *mdl)
+{
+ struct cx18_buffer *buf;
+
+ if (!s->dvb.enabled || mdl->bytesused == 0)
+ return;
+
+ /* We ignore mdl and buf readpos accounting here - it doesn't matter */
+
+ /* The likely case */
+ if (list_is_singular(&mdl->buf_list)) {
+ buf = list_first_entry(&mdl->buf_list, struct cx18_buffer,
+ list);
+ if (buf->bytesused)
+ dvb_dmx_swfilter(&s->dvb.demux,
+ buf->buf, buf->bytesused);
+ return;
+ }
+
+ list_for_each_entry(buf, &mdl->buf_list, list) {
+ if (buf->bytesused == 0)
+ break;
+ dvb_dmx_swfilter(&s->dvb.demux, buf->buf, buf->bytesused);
+ }
+}
+
+
+static void cx18_mdl_send_to_alsa(struct cx18 *cx, struct cx18_stream *s,
+ struct cx18_mdl *mdl)
{
- u32 handle, mdl_ack_count;
+ struct cx18_buffer *buf;
+
+ if (mdl->bytesused == 0)
+ return;
+
+ /* We ignore mdl and buf readpos accounting here - it doesn't matter */
+
+ /* The likely case */
+ if (list_is_singular(&mdl->buf_list)) {
+ buf = list_first_entry(&mdl->buf_list, struct cx18_buffer,
+ list);
+ if (buf->bytesused)
+ cx->pcm_announce_callback(cx->alsa, buf->buf,
+ buf->bytesused);
+ return;
+ }
+
+ list_for_each_entry(buf, &mdl->buf_list, list) {
+ if (buf->bytesused == 0)
+ break;
+ cx->pcm_announce_callback(cx->alsa, buf->buf, buf->bytesused);
+ }
+}
+
+static void epu_dma_done(struct cx18 *cx, struct cx18_in_work_order *order)
+{
+ u32 handle, mdl_ack_count, id;
struct cx18_mailbox *mb;
struct cx18_mdl_ack *mdl_ack;
struct cx18_stream *s;
- struct cx18_buffer *buf;
+ struct cx18_mdl *mdl;
int i;
mb = &order->mb;
if (s == NULL) {
CX18_WARN("Got DMA done notification for unknown/inactive"
- " handle %d\n", handle);
+ " handle %d, %s mailbox seq no %d\n", handle,
+ (order->flags & CX18_F_EWO_MB_STALE_UPON_RECEIPT) ?
+ "stale" : "good", mb->request);
return;
}
mdl_ack_count = mb->args[2];
mdl_ack = order->mdl_ack;
for (i = 0; i < mdl_ack_count; i++, mdl_ack++) {
- buf = cx18_queue_get_buf(s, mdl_ack->id, mdl_ack->data_used);
- CX18_DEBUG_HI_DMA("DMA DONE for %s (buffer %d)\n", s->name,
- mdl_ack->id);
- if (buf == NULL) {
- CX18_WARN("Could not find buf %d for stream %s\n",
- mdl_ack->id, s->name);
- continue;
+ id = mdl_ack->id;
+ /*
+ * Simple integrity check for processing a stale (and possibly
+ * inconsistent mailbox): make sure the MDL id is in the
+ * valid range for the stream.
+ *
+ * We go through the trouble of dealing with stale mailboxes
+ * because most of the time, the mailbox data is still valid and
+ * unchanged (and in practice the firmware ping-pongs the
+ * two mdl_ack buffers so mdl_acks are not stale).
+ *
+ * There are occasions when we get a half changed mailbox,
+ * which this check catches for a handle & id mismatch. If the
+ * handle and id do correspond, the worst case is that we
+ * completely lost the old MDL, but pick up the new MDL
+ * early (but the new mdl_ack is guaranteed to be good in this
+ * case as the firmware wouldn't point us to a new mdl_ack until
+ * it's filled in).
+ *
+ * cx18_queue_get_mdl() will detect the lost MDLs
+ * and send them back to q_free for fw rotation eventually.
+ */
+ if ((order->flags & CX18_F_EWO_MB_STALE_UPON_RECEIPT) &&
+ !(id >= s->mdl_base_idx &&
+ id < (s->mdl_base_idx + s->buffers))) {
+ CX18_WARN("Fell behind! Ignoring stale mailbox with "
+ " inconsistent data. Lost MDL for mailbox "
+ "seq no %d\n", mb->request);
+ break;
}
+ mdl = cx18_queue_get_mdl(s, id, mdl_ack->data_used);
- cx18_buf_sync_for_cpu(s, buf);
- if (s->type == CX18_ENC_STREAM_TYPE_TS && s->dvb.enabled) {
- CX18_DEBUG_HI_DMA("TS recv bytesused = %d\n",
- buf->bytesused);
-
- dvb_dmx_swfilter(&s->dvb.demux, buf->buf,
- buf->bytesused);
-
- cx18_buf_sync_for_device(s, buf);
+ CX18_DEBUG_HI_DMA("DMA DONE for %s (MDL %d)\n", s->name, id);
+ if (mdl == NULL) {
+ CX18_WARN("Could not find MDL %d for stream %s\n",
+ id, s->name);
+ continue;
+ }
- if (s->handle != CX18_INVALID_TASK_HANDLE &&
- test_bit(CX18_F_S_STREAMING, &s->s_flags))
- cx18_vapi(cx,
- CX18_CPU_DE_SET_MDL, 5, s->handle,
- (void __iomem *)
- &cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
- 1, buf->id, s->buf_size);
- } else
- set_bit(CX18_F_B_NEED_BUF_SWAP, &buf->b_flags);
+ CX18_DEBUG_HI_DMA("%s recv bytesused = %d\n",
+ s->name, mdl->bytesused);
+
+ if (s->type == CX18_ENC_STREAM_TYPE_TS) {
+ cx18_mdl_send_to_dvb(s, mdl);
+ cx18_enqueue(s, mdl, &s->q_free);
+ } else if (s->type == CX18_ENC_STREAM_TYPE_PCM) {
+ /* Pass the data to cx18-alsa */
+ if (cx->pcm_announce_callback != NULL) {
+ cx18_mdl_send_to_alsa(cx, s, mdl);
+ cx18_enqueue(s, mdl, &s->q_free);
+ } else {
+ cx18_enqueue(s, mdl, &s->q_full);
+ }
+ } else {
+ cx18_enqueue(s, mdl, &s->q_full);
+ if (s->type == CX18_ENC_STREAM_TYPE_IDX)
+ cx18_stream_rotate_idx_mdls(cx);
+ }
}
+ /* Put as many MDLs as possible back into fw use */
+ cx18_stream_load_fw_queue(s);
+
wake_up(&cx->dma_waitq);
if (s->id != -1)
wake_up(&s->waitq);
}
-static void epu_debug(struct cx18 *cx, struct cx18_epu_work_order *order)
+static void epu_debug(struct cx18 *cx, struct cx18_in_work_order *order)
{
char *p;
char *str = order->str;
CX18_INFO("FW version: %s\n", p - 1);
}
-static void epu_cmd(struct cx18 *cx, struct cx18_epu_work_order *order)
+static void epu_cmd(struct cx18 *cx, struct cx18_in_work_order *order)
{
switch (order->rpu) {
case CPU:
}
static
-void free_epu_work_order(struct cx18 *cx, struct cx18_epu_work_order *order)
+void free_in_work_order(struct cx18 *cx, struct cx18_in_work_order *order)
{
atomic_set(&order->pending, 0);
}
-void cx18_epu_work_handler(struct work_struct *work)
+void cx18_in_work_handler(struct work_struct *work)
{
- struct cx18_epu_work_order *order =
- container_of(work, struct cx18_epu_work_order, work);
+ struct cx18_in_work_order *order =
+ container_of(work, struct cx18_in_work_order, work);
struct cx18 *cx = order->cx;
epu_cmd(cx, order);
- free_epu_work_order(cx, order);
+ free_in_work_order(cx, order);
}
* Functions that run in an interrupt handling context
*/
-static void mb_ack_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
+static void mb_ack_irq(struct cx18 *cx, struct cx18_in_work_order *order)
{
struct cx18_mailbox __iomem *ack_mb;
u32 ack_irq, req;
/* Don't ack if the RPU has gotten impatient and timed us out */
if (req != cx18_readl(cx, &ack_mb->request) ||
req == cx18_readl(cx, &ack_mb->ack)) {
- CX18_WARN("Possibly falling behind: %s self-ack'ed our incoming"
- " %s to EPU mailbox (sequence no. %u) while "
- "processing\n",
- rpu_str[order->rpu], rpu_str[order->rpu], req);
+ CX18_DEBUG_WARN("Possibly falling behind: %s self-ack'ed our "
+ "incoming %s to EPU mailbox (sequence no. %u) "
+ "while processing\n",
+ rpu_str[order->rpu], rpu_str[order->rpu], req);
order->flags |= CX18_F_EWO_MB_STALE_WHILE_PROC;
return;
}
return;
}
-static int epu_dma_done_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
+static int epu_dma_done_irq(struct cx18 *cx, struct cx18_in_work_order *order)
{
u32 handle, mdl_ack_offset, mdl_ack_count;
struct cx18_mailbox *mb;
}
static
-int epu_debug_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
+int epu_debug_irq(struct cx18 *cx, struct cx18_in_work_order *order)
{
u32 str_offset;
char *str = order->str;
}
static inline
-int epu_cmd_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
+int epu_cmd_irq(struct cx18 *cx, struct cx18_in_work_order *order)
{
int ret = -1;
}
static inline
-struct cx18_epu_work_order *alloc_epu_work_order_irq(struct cx18 *cx)
+struct cx18_in_work_order *alloc_in_work_order_irq(struct cx18 *cx)
{
int i;
- struct cx18_epu_work_order *order = NULL;
+ struct cx18_in_work_order *order = NULL;
- for (i = 0; i < CX18_MAX_EPU_WORK_ORDERS; i++) {
+ for (i = 0; i < CX18_MAX_IN_WORK_ORDERS; i++) {
/*
* We only need "pending" atomic to inspect its contents,
* and need not do a check and set because:
* 2. "pending" is only set here, and we're serialized because
* we're called in an IRQ handler context.
*/
- if (atomic_read(&cx->epu_work_order[i].pending) == 0) {
- order = &cx->epu_work_order[i];
+ if (atomic_read(&cx->in_work_order[i].pending) == 0) {
+ order = &cx->in_work_order[i];
atomic_set(&order->pending, 1);
break;
}
{
struct cx18_mailbox __iomem *mb;
struct cx18_mailbox *order_mb;
- struct cx18_epu_work_order *order;
+ struct cx18_in_work_order *order;
int submit;
switch (rpu) {
return;
}
- order = alloc_epu_work_order_irq(cx);
+ order = alloc_in_work_order_irq(cx);
if (order == NULL) {
CX18_WARN("Unable to find blank work order form to schedule "
"incoming mailbox command processing\n");
order->flags = 0;
order->rpu = rpu;
order_mb = &order->mb;
- cx18_memcpy_fromio(cx, order_mb, mb, sizeof(struct cx18_mailbox));
+
+ /* mb->cmd and mb->args[0] through mb->args[2] */
+ cx18_memcpy_fromio(cx, &order_mb->cmd, &mb->cmd, 4 * sizeof(u32));
+ /* mb->request and mb->ack. N.B. we want to read mb->ack last */
+ cx18_memcpy_fromio(cx, &order_mb->request, &mb->request,
+ 2 * sizeof(u32));
if (order_mb->request == order_mb->ack) {
- CX18_WARN("Possibly falling behind: %s self-ack'ed our incoming"
- " %s to EPU mailbox (sequence no. %u)\n",
- rpu_str[rpu], rpu_str[rpu], order_mb->request);
- dump_mb(cx, order_mb, "incoming");
+ CX18_DEBUG_WARN("Possibly falling behind: %s self-ack'ed our "
+ "incoming %s to EPU mailbox (sequence no. %u)"
+ "\n",
+ rpu_str[rpu], rpu_str[rpu], order_mb->request);
+ if (cx18_debug & CX18_DBGFLG_WARN)
+ dump_mb(cx, order_mb, "incoming");
order->flags = CX18_F_EWO_MB_STALE_UPON_RECEIPT;
}
*/
submit = epu_cmd_irq(cx, order);
if (submit > 0) {
- queue_work(cx18_work_queue, &order->work);
+ queue_work(cx->in_work_queue, &order->work);
}
}
* Functions called from a non-interrupt, non work_queue context
*/
-static void cx18_api_log_ack_delay(struct cx18 *cx, int msecs)
-{
- if (msecs > CX18_MAX_MB_ACK_DELAY)
- msecs = CX18_MAX_MB_ACK_DELAY;
- atomic_inc(&cx->mbox_stats.mb_ack_delay[msecs]);
-}
-
static int cx18_api_call(struct cx18 *cx, u32 cmd, int args, u32 data[])
{
const struct cx18_api_info *info = find_api_info(cmd);
u32 __iomem *xpu_state;
wait_queue_head_t *waitq;
struct mutex *mb_lock;
- long int timeout, ret;
+ unsigned long int t0, timeout, ret;
int i;
+ char argstr[MAX_MB_ARGUMENTS*11+1];
+ DEFINE_WAIT(w);
if (info == NULL) {
CX18_WARN("unknown cmd %x\n", cmd);
return -EINVAL;
}
- if (cmd == CX18_CPU_DE_SET_MDL)
- CX18_DEBUG_HI_API("%s\n", info->name);
- else
- CX18_DEBUG_API("%s\n", info->name);
+ if (cx18_debug & CX18_DBGFLG_API) { /* only call u32arr2hex if needed */
+ if (cmd == CX18_CPU_DE_SET_MDL) {
+ if (cx18_debug & CX18_DBGFLG_HIGHVOL)
+ CX18_DEBUG_HI_API("%s\tcmd %#010x args%s\n",
+ info->name, cmd,
+ u32arr2hex(data, args, argstr));
+ } else
+ CX18_DEBUG_API("%s\tcmd %#010x args%s\n",
+ info->name, cmd,
+ u32arr2hex(data, args, argstr));
+ }
switch (info->rpu) {
case APU:
*/
state = cx18_readl(cx, xpu_state);
req = cx18_readl(cx, &mb->request);
- timeout = msecs_to_jiffies(20); /* 1 field at 50 Hz vertical refresh */
+ timeout = msecs_to_jiffies(10);
ret = wait_event_timeout(*waitq,
(ack = cx18_readl(cx, &mb->ack)) == req,
timeout);
CX18_ERR("mbox was found stuck busy when setting up for %s; "
"clearing busy and trying to proceed\n", info->name);
} else if (ret != timeout)
- CX18_DEBUG_API("waited %u usecs for busy mbox to be acked\n",
- jiffies_to_usecs(timeout-ret));
+ CX18_DEBUG_API("waited %u msecs for busy mbox to be acked\n",
+ jiffies_to_msecs(timeout-ret));
/* Build the outgoing mailbox */
req = ((req & 0xfffffffe) == 0xfffffffe) ? 1 : req + 1;
/*
* Notify the XPU and wait for it to send an Ack back
- * 21 ms = ~ 0.5 frames at a frame rate of 24 fps
- * 42 ms = ~ 1 frame at a frame rate of 24 fps
*/
- timeout = msecs_to_jiffies((info->flags & API_FAST) ? 21 : 42);
+ timeout = msecs_to_jiffies((info->flags & API_FAST) ? 10 : 20);
CX18_DEBUG_HI_IRQ("sending interrupt SW1: %x to send %s\n",
irq, info->name);
+
+ /* So we don't miss the wakeup, prepare to wait before notifying fw */
+ prepare_to_wait(waitq, &w, TASK_UNINTERRUPTIBLE);
cx18_write_reg_expect(cx, irq, SW1_INT_SET, irq, irq);
- ret = wait_event_timeout(
- *waitq,
- cx18_readl(cx, &mb->ack) == cx18_readl(cx, &mb->request),
- timeout);
- if (ret == 0) {
- /* Timed out */
+ t0 = jiffies;
+ ack = cx18_readl(cx, &mb->ack);
+ if (ack != req) {
+ schedule_timeout(timeout);
+ ret = jiffies - t0;
+ ack = cx18_readl(cx, &mb->ack);
+ } else {
+ ret = jiffies - t0;
+ }
+
+ finish_wait(waitq, &w);
+
+ if (req != ack) {
mutex_unlock(mb_lock);
- i = jiffies_to_msecs(timeout);
- cx18_api_log_ack_delay(cx, i);
- CX18_WARN("sending %s timed out waiting %d msecs for RPU "
- "acknowledgement\n", info->name, i);
+ if (ret >= timeout) {
+ /* Timed out */
+ CX18_DEBUG_WARN("sending %s timed out waiting %d msecs "
+ "for RPU acknowledgement\n",
+ info->name, jiffies_to_msecs(ret));
+ } else {
+ CX18_DEBUG_WARN("woken up before mailbox ack was ready "
+ "after submitting %s to RPU. only "
+ "waited %d msecs on req %u but awakened"
+ " with unmatched ack %u\n",
+ info->name,
+ jiffies_to_msecs(ret),
+ req, ack);
+ }
return -EINVAL;
- } else if (ret < 0) {
- /* Interrupted */
- mutex_unlock(mb_lock);
- CX18_WARN("sending %s was interrupted waiting for RPU"
- "acknowledgement\n", info->name);
- return -EINTR;
}
- i = jiffies_to_msecs(timeout-ret);
- cx18_api_log_ack_delay(cx, i);
- if (ret != timeout)
+ if (ret >= timeout)
+ CX18_DEBUG_WARN("failed to be awakened upon RPU acknowledgment "
+ "sending %s; timed out waiting %d msecs\n",
+ info->name, jiffies_to_msecs(ret));
+ else
CX18_DEBUG_HI_API("waited %u msecs for %s to be acked\n",
- i, info->name);
+ jiffies_to_msecs(ret), info->name);
/* Collect data returned by the XPU */
for (i = 0; i < MAX_MB_ARGUMENTS; i++)
/*
* Wait for XPU to perform extra actions for the caller in some cases.
- * e.g. CX18_CPU_DE_RELEASE_MDL will cause the CPU to send all buffers
+ * e.g. CX18_CPU_DE_RELEASE_MDL will cause the CPU to send all MDLs
* back in a burst shortly thereafter
*/
if (info->flags & API_SLOW)
int cx18_api_func(void *priv, u32 cmd, int in, int out,
u32 data[CX2341X_MBOX_MAX_DATA])
{
- struct cx18 *cx = priv;
- struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
+ struct cx18_api_func_private *api_priv = priv;
+ struct cx18 *cx = api_priv->cx;
+ struct cx18_stream *s = api_priv->s;
switch (cmd) {
case CX2341X_ENC_SET_OUTPUT_PORT:
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff