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

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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>
This commit is contained in:
Michael Grzeschik 2013-06-13 17:59:53 +03:00 • committed by Greg Kroah-Hartman
parent 20a677fd63
commit cc9e6c495b
3 changed files with 128 additions and 61 deletions
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17
drivers/usb/chipidea/debug.c
View file

@ -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"));
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 *)req->ptr + j));
for (j = 0; j < qsize; j++)
seq_printf(s, " %04X: %08X\n", j,
*((u32 *)node->ptr + j));
}
}
spin_unlock_irqrestore(&ci->lock, flags);