ETRAX-FS: Process outgoing DMA channels until EOL.

For outgoing DMA channels, keep processing descriptors until hitting end
of list.
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5553 c046a42c-6fe2-441c-8c8c-71466251a162

hw/etraxfs_dma.c

@@ -393,72 +393,74 @@ static void channel_out_run(struct fs_dma_ctrl *ctrl, int c)
 	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("ch=%d buf=%x after=%x saved_data_buf=%x\n",
-		 c,
-		 (uint32_t)ctrl->channels[c].current_d.buf,
-		 (uint32_t)ctrl->channels[c].current_d.after,
-		 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);
-
-	D(printf("channel %d pushes %x %u bytes\n", c, 
-		 saved_data_buf, len));
-
-	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);
-
-	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) {
-			/* TODO: signal eop to the client.  */
-			D(printf("signal eop\n"));
+	while (ctrl->channels[c].eol != 1) {
+		saved_data_buf = channel_reg(ctrl, c, RW_SAVED_DATA_BUF);
+
+		D(printf("ch=%d buf=%x after=%x saved_data_buf=%x\n",
+			 c,
+			 (uint32_t)ctrl->channels[c].current_d.buf,
+			 (uint32_t)ctrl->channels[c].current_d.after,
+			 saved_data_buf));
+
+		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));
+
+		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);
+
+		saved_data_buf += len;
+
+		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;
+
+				/* 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)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;
+			}
+
+			channel_store_d(ctrl, c);
+			ctrl->channels[c].regs[RW_SAVED_DATA_BUF] =
+							saved_data_buf;
+			D(dump_d(c, &ctrl->channels[c].current_d));
 		}
-		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;
-
-			/* 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;
-		}
-
-		channel_store_d(ctrl, c);
 		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;
 }
 
 static int channel_in_process(struct fs_dma_ctrl *ctrl, int c, 
@@ -471,7 +473,7 @@ static int channel_in_process(struct fs_dma_ctrl *ctrl, int c,
 		return 0;
 
 	saved_data_buf = channel_reg(ctrl, c, RW_SAVED_DATA_BUF);
-	len = (uint32_t)(unsigned long) ctrl->channels[c].current_d.after;
+	len = (uint32_t)ctrl->channels[c].current_d.after;
 	len -= saved_data_buf;
 	
 	if (len > buflen)
@@ -481,7 +483,7 @@ static int channel_in_process(struct fs_dma_ctrl *ctrl, int c,
 	saved_data_buf += len;
 
 	if (saved_data_buf ==
-	    (uint32_t)(unsigned long)ctrl->channels[c].current_d.after
+	    (uint32_t)ctrl->channels[c].current_d.after
 	    || eop) {
 		uint32_t r_intr = ctrl->channels[c].regs[R_INTR];
 
@@ -518,10 +520,10 @@ static int channel_in_process(struct fs_dma_ctrl *ctrl, int c,
 			channel_stop(ctrl, c);
 		} else {
 			ctrl->channels[c].regs[RW_SAVED_DATA] =
-				(uint32_t)(unsigned long) ctrl->channels[c].current_d.next;
+				(uint32_t)ctrl->channels[c].current_d.next;
 			/* Load new descriptor.  */
 			channel_load_d(ctrl, c);
-			saved_data_buf = (uint32_t)(unsigned long)
+			saved_data_buf = (uint32_t)
 				ctrl->channels[c].current_d.buf;
 		}
 	}