usb: chipidea: udc: manage dynamic amount of tds with a linked list

Instead of having a limited number of usable tds in the udc we use a
linked list to support dynamic amount of needed tds for all special
gadget types. This improves throughput.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 12 insertions, 7 deletions

diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c
index 36a7063a6cba..64b8c32d4f33 100644
--- a/drivers/usb/chipidea/debug.c
+++ b/drivers/usb/chipidea/debug.c
@@ -162,6 +162,7 @@ static int ci_requests_show(struct seq_file *s, void *data)
         unsigned long flags;
         struct list_head   *ptr = NULL;
         struct ci13xxx_req *req = NULL;
+        struct td_node *node, *tmpnode;
         unsigned i, j, qsize = sizeof(struct ci13xxx_td)/sizeof(u32);
 
         if (ci->role != CI_ROLE_GADGET) {
@@ -174,13 +175,17 @@ static int ci_requests_show(struct seq_file *s, void *data)
                 list_for_each(ptr, &ci->ci13xxx_ep[i].qh.queue) {
                         req = list_entry(ptr, struct ci13xxx_req, queue);
 
-                        seq_printf(s, "EP=%02i: TD=%08X %s\n",
-                                   i % (ci->hw_ep_max / 2), (u32)req->dma,
-                                   ((i < ci->hw_ep_max/2) ? "RX" : "TX"));
-
-                        for (j = 0; j < qsize; j++)
-                                seq_printf(s, " %04X:    %08X\n", j,
-                                           *((u32 *)req->ptr + j));
+                        list_for_each_entry_safe(node, tmpnode, &req->tds, td) {
+                                seq_printf(s, "EP=%02i: TD=%08X %s\n",
+                                           i % (ci->hw_ep_max / 2),
+                                           (u32)node->dma,
+                                           ((i < ci->hw_ep_max/2) ?
+                                           "RX" : "TX"));
+
+                                for (j = 0; j < qsize; j++)
+                                        seq_printf(s, " %04X:    %08X\n", j,
+                                                   *((u32 *)node->ptr + j));
+                        }
                 }
         spin_unlock_irqrestore(&ci->lock, flags);