static void channel_out_run(struct fs_dma_ctrl *ctrl, int c)
{
uint32_t len;
uint32_t saved_data_buf;
unsigned char buf[2 * 1024];
if (ctrl->channels[c].eol == 1)
return;
saved_data_buf = channel_reg(ctrl, c, RW_SAVED_DATA_BUF);
D(printf("buf=%x after=%x saved_data_buf=%x\n",
(uint32_t)ctrl->channels[c].current_d.buf,
(uint32_t)ctrl->channels[c].current_d.after,
saved_data_buf));
if (saved_data_buf == (uint32_t)ctrl->channels[c].current_d.after) {
/* Done. Step to next. */
if (ctrl->channels[c].current_d.out_eop) {
/* TODO: signal eop to the client. */
D(printf("signal eop\n"));
}
if (ctrl->channels[c].current_d.intr) {
/* TODO: signal eop to the client. */
/* data intr. */
D(printf("signal intr\n"));
ctrl->channels[c].regs[R_INTR] |= (1 << 2);
channel_update_irq(ctrl, c);
}
if (ctrl->channels[c].current_d.eol) {
D(printf("channel %d EOL\n", c));
ctrl->channels[c].eol = 1;
channel_stop(ctrl, c);
} else {
ctrl->channels[c].regs[RW_SAVED_DATA] =
(uint32_t) ctrl->channels[c].current_d.next;
/* Load new descriptor. */
channel_load_d(ctrl, c);
}
channel_store_d(ctrl, c);
D(dump_d(c, &ctrl->channels[c].current_d));
return;
}
len = (uint32_t) ctrl->channels[c].current_d.after;
len -= saved_data_buf;
if (len > sizeof buf)
len = sizeof buf;
cpu_physical_memory_read (saved_data_buf, buf, len);
D(printf("channel %d pushes %x %u bytes\n", c,
saved_data_buf, len));
/* TODO: Push content. */
if (ctrl->channels[c].client->client.push)
ctrl->channels[c].client->client.push(
ctrl->channels[c].client->client.opaque, buf, len);
else
printf("WARNING: DMA ch%d dataloss, no attached client.\n", c);
ctrl->channels[c].regs[RW_SAVED_DATA_BUF] += len;
}
static int channel_in_process(struct fs_dma_ctrl *ctrl, int c,
unsigned char *buf, int buflen, int eop)
{
uint32_t len;
uint32_t saved_data_buf;
if (ctrl->channels[c].eol == 1)
return 0;
saved_data_buf = channel_reg(ctrl, c, RW_SAVED_DATA_BUF);
len = (uint32_t) ctrl->channels[c].current_d.after;
len -= saved_data_buf;
if (len > buflen)
len = buflen;
cpu_physical_memory_write (saved_data_buf, buf, len);
saved_data_buf += len;
if (saved_data_buf == (uint32_t)ctrl->channels[c].current_d.after
|| eop) {
uint32_t r_intr = ctrl->channels[c].regs[R_INTR];
D(printf("in dscr end len=%d\n",
ctrl->channels[c].current_d.after
- ctrl->channels[c].current_d.buf));
ctrl->channels[c].current_d.after =
(void *) saved_data_buf;
/* Done. Step to next. */
if (ctrl->channels[c].current_d.intr) {
/* TODO: signal eop to the client. */
/* data intr. */
ctrl->channels[c].regs[R_INTR] |= 3;
}
if (eop) {
ctrl->channels[c].current_d.in_eop = 1;
ctrl->channels[c].regs[R_INTR] |= 8;
}
if (r_intr != ctrl->channels[c].regs[R_INTR])
channel_update_irq(ctrl, c);
channel_store_d(ctrl, c);
D(dump_d(c, &ctrl->channels[c].current_d));
if (ctrl->channels[c].current_d.eol) {
D(printf("channel %d EOL\n", c));
ctrl->channels[c].eol = 1;
channel_stop(ctrl, c);
} else {
ctrl->channels[c].regs[RW_SAVED_DATA] =
(uint32_t) ctrl->channels[c].current_d.next;
/* Load new descriptor. */
channel_load_d(ctrl, c);
saved_data_buf =
ctrl->channels[c].regs[RW_SAVED_DATA_BUF];
}
}
ctrl->channels[c].regs[RW_SAVED_DATA_BUF] = saved_data_buf;
return len;
}
static int channel_out_run(struct fs_dma_ctrl *ctrl, int c)
{
uint32_t len;
uint32_t saved_data_buf;
unsigned char buf[2 * 1024];
struct dma_context_metadata meta;
bool send_context = true;
if (ctrl->channels[c].eol)
return 0;
do {
bool out_eop;
D(printf("ch=%d buf=%x after=%x\n",
c,
(uint32_t)ctrl->channels[c].current_d.buf,
(uint32_t)ctrl->channels[c].current_d.after));
if (send_context) {
if (ctrl->channels[c].client->client.metadata_push) {
meta.metadata = ctrl->channels[c].current_d.md;
ctrl->channels[c].client->client.metadata_push(
ctrl->channels[c].client->client.opaque,
&meta);
}
send_context = false;
}
channel_load_d(ctrl, c);
saved_data_buf = channel_reg(ctrl, c, RW_SAVED_DATA_BUF);
len = (uint32_t)(unsigned long)
ctrl->channels[c].current_d.after;
len -= saved_data_buf;
if (len > sizeof buf)
len = sizeof buf;
cpu_physical_memory_read (saved_data_buf, buf, len);
out_eop = ((saved_data_buf + len) ==
ctrl->channels[c].current_d.after) &&
ctrl->channels[c].current_d.out_eop;
D(printf("channel %d pushes %x %u bytes eop=%u\n", c,
saved_data_buf, len, out_eop));
if (ctrl->channels[c].client->client.push)
ctrl->channels[c].client->client.push(
ctrl->channels[c].client->client.opaque,
buf, len, out_eop);
else
printf("WARNING: DMA ch%d dataloss,"
" no attached client.\n", c);
saved_data_buf += len;
if (saved_data_buf == (uint32_t)(unsigned long)
ctrl->channels[c].current_d.after) {
/* Done. Step to next. */
if (ctrl->channels[c].current_d.out_eop) {
send_context = true;
}
if (ctrl->channels[c].current_d.intr) {
/* data intr. */
D(printf("signal intr %d eol=%d\n",
len, ctrl->channels[c].current_d.eol));
ctrl->channels[c].regs[R_INTR] |= (1 << 2);
channel_update_irq(ctrl, c);
}
channel_store_d(ctrl, c);
if (ctrl->channels[c].current_d.eol) {
D(printf("channel %d EOL\n", c));
ctrl->channels[c].eol = 1;
/* Mark the context as disabled. */
ctrl->channels[c].current_c.dis = 1;
channel_store_c(ctrl, c);
channel_stop(ctrl, c);
} else {
ctrl->channels[c].regs[RW_SAVED_DATA] =
(uint32_t)(unsigned long)ctrl->
channels[c].current_d.next;
/* Load new descriptor. */
channel_load_d(ctrl, c);
saved_data_buf = (uint32_t)(unsigned long)
ctrl->channels[c].current_d.buf;
}
ctrl->channels[c].regs[RW_SAVED_DATA_BUF] =
saved_data_buf;
D(dump_d(c, &ctrl->channels[c].current_d));
}
ctrl->channels[c].regs[RW_SAVED_DATA_BUF] = saved_data_buf;
} while (!ctrl->channels[c].eol);
return 1;
}