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usb: gadget: f_tcm: Handle multiple commands in parallel

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Resubmit command on completion to fetch more commands and service them
in parallel. Increase the number of work in a queue. Each work will be
for each command allowing them to be processed concurrently. Also, set
them to be unbounded by cpu to improve performance.

Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/933cf7191b672bf4cfbea4df19af1b08dc1baca9.1733876548.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thinh Nguyen 2024-12-11 00:32:49 +00:00 committed by Greg Kroah-Hartman
parent a570559a4f
commit 0d2d759c9a
1 changed files with 8 additions and 12 deletions
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20
drivers/usb/gadget/function/f_tcm.c
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@ -707,21 +707,16 @@ static int usbg_submit_command(struct f_uas *, struct usb_request *);
static void uasp_cmd_complete(struct usb_ep *ep, struct usb_request *req)
{
struct f_uas *fu = req->context;
int ret;
if (req->status < 0)
if (req->status == -ESHUTDOWN)
return;
ret = usbg_submit_command(fu, req);
/*
* Once we tune for performance enqueue the command req here again so
* we can receive a second command while we processing this one. Pay
* attention to properly sync STAUS endpoint with DATA IN + OUT so you
* don't break HS.
*/
if (!ret)
if (req->status < 0) {
usb_ep_queue(fu->ep_cmd, req, GFP_ATOMIC);
return;
usb_ep_queue(fu->ep_cmd, req, GFP_ATOMIC);
}
usbg_submit_command(fu, req);
}
static int uasp_alloc_stream_res(struct f_uas *fu, struct uas_stream *stream)
@ -1309,7 +1304,8 @@ static struct se_portal_group *usbg_make_tpg(struct se_wwn *wwn,
goto unref_dep;
mutex_init(&tpg->tpg_mutex);
atomic_set(&tpg->tpg_port_count, 0);
tpg->workqueue = alloc_workqueue("tcm_usb_gadget", 0, 1);
tpg->workqueue = alloc_workqueue("tcm_usb_gadget",
WQ_UNBOUND, WQ_UNBOUND_MAX_ACTIVE);
if (!tpg->workqueue)
goto free_tpg;