dt-bindings: mtd: ingenic: Use standard ecc-engine property
[linux/fpc-iii.git] / drivers / usb / usbip / vhci_tx.c
blob9aed15a358b7b98b0fab9e6b02b6820cff9ff808
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2003-2008 Takahiro Hirofuchi
4 */
6 #include <linux/kthread.h>
7 #include <linux/slab.h>
9 #include "usbip_common.h"
10 #include "vhci.h"
12 static void setup_cmd_submit_pdu(struct usbip_header *pdup, struct urb *urb)
14 struct vhci_priv *priv = ((struct vhci_priv *)urb->hcpriv);
15 struct vhci_device *vdev = priv->vdev;
17 usbip_dbg_vhci_tx("URB, local devnum %u, remote devid %u\n",
18 usb_pipedevice(urb->pipe), vdev->devid);
20 pdup->base.command = USBIP_CMD_SUBMIT;
21 pdup->base.seqnum = priv->seqnum;
22 pdup->base.devid = vdev->devid;
23 pdup->base.direction = usb_pipein(urb->pipe) ?
24 USBIP_DIR_IN : USBIP_DIR_OUT;
25 pdup->base.ep = usb_pipeendpoint(urb->pipe);
27 usbip_pack_pdu(pdup, urb, USBIP_CMD_SUBMIT, 1);
29 if (urb->setup_packet)
30 memcpy(pdup->u.cmd_submit.setup, urb->setup_packet, 8);
33 static struct vhci_priv *dequeue_from_priv_tx(struct vhci_device *vdev)
35 struct vhci_priv *priv, *tmp;
36 unsigned long flags;
38 spin_lock_irqsave(&vdev->priv_lock, flags);
40 list_for_each_entry_safe(priv, tmp, &vdev->priv_tx, list) {
41 list_move_tail(&priv->list, &vdev->priv_rx);
42 spin_unlock_irqrestore(&vdev->priv_lock, flags);
43 return priv;
46 spin_unlock_irqrestore(&vdev->priv_lock, flags);
48 return NULL;
51 static int vhci_send_cmd_submit(struct vhci_device *vdev)
53 struct vhci_priv *priv = NULL;
55 struct msghdr msg;
56 struct kvec iov[3];
57 size_t txsize;
59 size_t total_size = 0;
61 while ((priv = dequeue_from_priv_tx(vdev)) != NULL) {
62 int ret;
63 struct urb *urb = priv->urb;
64 struct usbip_header pdu_header;
65 struct usbip_iso_packet_descriptor *iso_buffer = NULL;
67 txsize = 0;
68 memset(&pdu_header, 0, sizeof(pdu_header));
69 memset(&msg, 0, sizeof(msg));
70 memset(&iov, 0, sizeof(iov));
72 usbip_dbg_vhci_tx("setup txdata urb seqnum %lu\n",
73 priv->seqnum);
75 /* 1. setup usbip_header */
76 setup_cmd_submit_pdu(&pdu_header, urb);
77 usbip_header_correct_endian(&pdu_header, 1);
79 iov[0].iov_base = &pdu_header;
80 iov[0].iov_len = sizeof(pdu_header);
81 txsize += sizeof(pdu_header);
83 /* 2. setup transfer buffer */
84 if (!usb_pipein(urb->pipe) && urb->transfer_buffer_length > 0) {
85 iov[1].iov_base = urb->transfer_buffer;
86 iov[1].iov_len = urb->transfer_buffer_length;
87 txsize += urb->transfer_buffer_length;
90 /* 3. setup iso_packet_descriptor */
91 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
92 ssize_t len = 0;
94 iso_buffer = usbip_alloc_iso_desc_pdu(urb, &len);
95 if (!iso_buffer) {
96 usbip_event_add(&vdev->ud,
97 SDEV_EVENT_ERROR_MALLOC);
98 return -1;
101 iov[2].iov_base = iso_buffer;
102 iov[2].iov_len = len;
103 txsize += len;
106 ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 3, txsize);
107 if (ret != txsize) {
108 pr_err("sendmsg failed!, ret=%d for %zd\n", ret,
109 txsize);
110 kfree(iso_buffer);
111 usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
112 return -1;
115 kfree(iso_buffer);
116 usbip_dbg_vhci_tx("send txdata\n");
118 total_size += txsize;
121 return total_size;
124 static struct vhci_unlink *dequeue_from_unlink_tx(struct vhci_device *vdev)
126 struct vhci_unlink *unlink, *tmp;
127 unsigned long flags;
129 spin_lock_irqsave(&vdev->priv_lock, flags);
131 list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
132 list_move_tail(&unlink->list, &vdev->unlink_rx);
133 spin_unlock_irqrestore(&vdev->priv_lock, flags);
134 return unlink;
137 spin_unlock_irqrestore(&vdev->priv_lock, flags);
139 return NULL;
142 static int vhci_send_cmd_unlink(struct vhci_device *vdev)
144 struct vhci_unlink *unlink = NULL;
146 struct msghdr msg;
147 struct kvec iov[3];
148 size_t txsize;
150 size_t total_size = 0;
152 while ((unlink = dequeue_from_unlink_tx(vdev)) != NULL) {
153 int ret;
154 struct usbip_header pdu_header;
156 txsize = 0;
157 memset(&pdu_header, 0, sizeof(pdu_header));
158 memset(&msg, 0, sizeof(msg));
159 memset(&iov, 0, sizeof(iov));
161 usbip_dbg_vhci_tx("setup cmd unlink, %lu\n", unlink->seqnum);
163 /* 1. setup usbip_header */
164 pdu_header.base.command = USBIP_CMD_UNLINK;
165 pdu_header.base.seqnum = unlink->seqnum;
166 pdu_header.base.devid = vdev->devid;
167 pdu_header.base.ep = 0;
168 pdu_header.u.cmd_unlink.seqnum = unlink->unlink_seqnum;
170 usbip_header_correct_endian(&pdu_header, 1);
172 iov[0].iov_base = &pdu_header;
173 iov[0].iov_len = sizeof(pdu_header);
174 txsize += sizeof(pdu_header);
176 ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 1, txsize);
177 if (ret != txsize) {
178 pr_err("sendmsg failed!, ret=%d for %zd\n", ret,
179 txsize);
180 usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
181 return -1;
184 usbip_dbg_vhci_tx("send txdata\n");
186 total_size += txsize;
189 return total_size;
192 int vhci_tx_loop(void *data)
194 struct usbip_device *ud = data;
195 struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
197 while (!kthread_should_stop()) {
198 if (vhci_send_cmd_submit(vdev) < 0)
199 break;
201 if (vhci_send_cmd_unlink(vdev) < 0)
202 break;
204 wait_event_interruptible(vdev->waitq_tx,
205 (!list_empty(&vdev->priv_tx) ||
206 !list_empty(&vdev->unlink_tx) ||
207 kthread_should_stop()));
209 usbip_dbg_vhci_tx("pending urbs ?, now wake up\n");
212 return 0;