aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/usb/gadget/function/f_ncm.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/gadget/function/f_ncm.c')
-rw-r--r--drivers/usb/gadget/function/f_ncm.c112
1 files changed, 79 insertions, 33 deletions
diff --git a/drivers/usb/gadget/function/f_ncm.c b/drivers/usb/gadget/function/f_ncm.c
index 10b4612df8a7..2ef2464a5043 100644
--- a/drivers/usb/gadget/function/f_ncm.c
+++ b/drivers/usb/gadget/function/f_ncm.c
@@ -23,6 +23,7 @@
#include "u_ether.h"
#include "u_ether_configfs.h"
#include "u_ncm.h"
+#include "configfs.h"
/*
* This function is a "CDC Network Control Model" (CDC NCM) Ethernet link.
@@ -35,9 +36,7 @@
/* to trigger crc/non-crc ndp signature */
-#define NCM_NDP_HDR_CRC_MASK 0x01000000
#define NCM_NDP_HDR_CRC 0x01000000
-#define NCM_NDP_HDR_NOCRC 0x00000000
enum ncm_notify_state {
NCM_NOTIFY_NONE, /* don't notify */
@@ -86,7 +85,9 @@ static inline struct f_ncm *func_to_ncm(struct usb_function *f)
/* peak (theoretical) bulk transfer rate in bits-per-second */
static inline unsigned ncm_bitrate(struct usb_gadget *g)
{
- if (gadget_is_superspeed(g) && g->speed >= USB_SPEED_SUPER_PLUS)
+ if (!g)
+ return 0;
+ else if (gadget_is_superspeed(g) && g->speed >= USB_SPEED_SUPER_PLUS)
return 4250000000U;
else if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER)
return 3750000000U;
@@ -529,6 +530,7 @@ static inline void ncm_reset_values(struct f_ncm *ncm)
{
ncm->parser_opts = &ndp16_opts;
ncm->is_crc = false;
+ ncm->ndp_sign = ncm->parser_opts->ndp_sign;
ncm->port.cdc_filter = DEFAULT_FILTER;
/* doesn't make sense for ncm, fixed size used */
@@ -811,25 +813,20 @@ static int ncm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
| USB_CDC_SET_CRC_MODE:
{
- int ndp_hdr_crc = 0;
-
if (w_length != 0 || w_index != ncm->ctrl_id)
goto invalid;
switch (w_value) {
case 0x0000:
ncm->is_crc = false;
- ndp_hdr_crc = NCM_NDP_HDR_NOCRC;
DBG(cdev, "non-CRC mode selected\n");
break;
case 0x0001:
ncm->is_crc = true;
- ndp_hdr_crc = NCM_NDP_HDR_CRC;
DBG(cdev, "CRC mode selected\n");
break;
default:
goto invalid;
}
- ncm->ndp_sign = ncm->parser_opts->ndp_sign | ndp_hdr_crc;
value = 0;
break;
}
@@ -846,6 +843,8 @@ invalid:
ctrl->bRequestType, ctrl->bRequest,
w_value, w_index, w_length);
}
+ ncm->ndp_sign = ncm->parser_opts->ndp_sign |
+ (ncm->is_crc ? NCM_NDP_HDR_CRC : 0);
/* respond with data transfer or status phase? */
if (value >= 0) {
@@ -1181,7 +1180,8 @@ static int ncm_unwrap_ntb(struct gether *port,
struct sk_buff_head *list)
{
struct f_ncm *ncm = func_to_ncm(&port->func);
- __le16 *tmp = (void *) skb->data;
+ unsigned char *ntb_ptr = skb->data;
+ __le16 *tmp;
unsigned index, index2;
int ndp_index;
unsigned dg_len, dg_len2;
@@ -1194,6 +1194,10 @@ static int ncm_unwrap_ntb(struct gether *port,
const struct ndp_parser_opts *opts = ncm->parser_opts;
unsigned crc_len = ncm->is_crc ? sizeof(uint32_t) : 0;
int dgram_counter;
+ int to_process = skb->len;
+
+parse_ntb:
+ tmp = (__le16 *)ntb_ptr;
/* dwSignature */
if (get_unaligned_le32(tmp) != opts->nth_sign) {
@@ -1240,7 +1244,7 @@ static int ncm_unwrap_ntb(struct gether *port,
* walk through NDP
* dwSignature
*/
- tmp = (void *)(skb->data + ndp_index);
+ tmp = (__le16 *)(ntb_ptr + ndp_index);
if (get_unaligned_le32(tmp) != ncm->ndp_sign) {
INFO(port->func.config->cdev, "Wrong NDP SIGN\n");
goto err;
@@ -1297,11 +1301,11 @@ static int ncm_unwrap_ntb(struct gether *port,
if (ncm->is_crc) {
uint32_t crc, crc2;
- crc = get_unaligned_le32(skb->data +
+ crc = get_unaligned_le32(ntb_ptr +
index + dg_len -
crc_len);
crc2 = ~crc32_le(~0,
- skb->data + index,
+ ntb_ptr + index,
dg_len - crc_len);
if (crc != crc2) {
INFO(port->func.config->cdev,
@@ -1328,7 +1332,7 @@ static int ncm_unwrap_ntb(struct gether *port,
dg_len - crc_len);
if (skb2 == NULL)
goto err;
- skb_put_data(skb2, skb->data + index,
+ skb_put_data(skb2, ntb_ptr + index,
dg_len - crc_len);
skb_queue_tail(list, skb2);
@@ -1341,10 +1345,17 @@ static int ncm_unwrap_ntb(struct gether *port,
} while (ndp_len > 2 * (opts->dgram_item_len * 2));
} while (ndp_index);
- dev_consume_skb_any(skb);
-
VDBG(port->func.config->cdev,
"Parsed NTB with %d frames\n", dgram_counter);
+
+ to_process -= block_len;
+ if (to_process != 0) {
+ ntb_ptr = (unsigned char *)(ntb_ptr + block_len);
+ goto parse_ntb;
+ }
+
+ dev_consume_skb_any(skb);
+
return 0;
err:
skb_queue_purge(list);
@@ -1424,7 +1435,7 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
struct usb_composite_dev *cdev = c->cdev;
struct f_ncm *ncm = func_to_ncm(f);
struct usb_string *us;
- int status;
+ int status = 0;
struct usb_ep *ep;
struct f_ncm_opts *ncm_opts;
@@ -1432,26 +1443,33 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
return -EINVAL;
ncm_opts = container_of(f->fi, struct f_ncm_opts, func_inst);
- /*
- * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
- * configurations are bound in sequence with list_for_each_entry,
- * in each configuration its functions are bound in sequence
- * with list_for_each_entry, so we assume no race condition
- * with regard to ncm_opts->bound access
- */
- if (!ncm_opts->bound) {
- mutex_lock(&ncm_opts->lock);
- gether_set_gadget(ncm_opts->net, cdev->gadget);
- status = gether_register_netdev(ncm_opts->net);
- mutex_unlock(&ncm_opts->lock);
- if (status)
- return status;
- ncm_opts->bound = true;
+
+ if (cdev->use_os_string) {
+ f->os_desc_table = kzalloc(sizeof(*f->os_desc_table),
+ GFP_KERNEL);
+ if (!f->os_desc_table)
+ return -ENOMEM;
+ f->os_desc_n = 1;
+ f->os_desc_table[0].os_desc = &ncm_opts->ncm_os_desc;
}
+
+ mutex_lock(&ncm_opts->lock);
+ gether_set_gadget(ncm_opts->net, cdev->gadget);
+ if (!ncm_opts->bound)
+ status = gether_register_netdev(ncm_opts->net);
+ mutex_unlock(&ncm_opts->lock);
+
+ if (status)
+ goto fail;
+
+ ncm_opts->bound = true;
+
us = usb_gstrings_attach(cdev, ncm_strings,
ARRAY_SIZE(ncm_string_defs));
- if (IS_ERR(us))
- return PTR_ERR(us);
+ if (IS_ERR(us)) {
+ status = PTR_ERR(us);
+ goto fail;
+ }
ncm_control_intf.iInterface = us[STRING_CTRL_IDX].id;
ncm_data_nop_intf.iInterface = us[STRING_DATA_IDX].id;
ncm_data_intf.iInterface = us[STRING_DATA_IDX].id;
@@ -1468,6 +1486,10 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
ncm_control_intf.bInterfaceNumber = status;
ncm_union_desc.bMasterInterface0 = status;
+ if (cdev->use_os_string)
+ f->os_desc_table[0].if_id =
+ ncm_iad_desc.bFirstInterface;
+
status = usb_interface_id(c, f);
if (status < 0)
goto fail;
@@ -1547,6 +1569,9 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
return 0;
fail:
+ kfree(f->os_desc_table);
+ f->os_desc_n = 0;
+
if (ncm->notify_req) {
kfree(ncm->notify_req->buf);
usb_ep_free_request(ncm->notify, ncm->notify_req);
@@ -1601,16 +1626,22 @@ static void ncm_free_inst(struct usb_function_instance *f)
gether_cleanup(netdev_priv(opts->net));
else
free_netdev(opts->net);
+ kfree(opts->ncm_interf_group);
kfree(opts);
}
static struct usb_function_instance *ncm_alloc_inst(void)
{
struct f_ncm_opts *opts;
+ struct usb_os_desc *descs[1];
+ char *names[1];
+ struct config_group *ncm_interf_group;
opts = kzalloc(sizeof(*opts), GFP_KERNEL);
if (!opts)
return ERR_PTR(-ENOMEM);
+ opts->ncm_os_desc.ext_compat_id = opts->ncm_ext_compat_id;
+
mutex_init(&opts->lock);
opts->func_inst.free_func_inst = ncm_free_inst;
opts->net = gether_setup_default();
@@ -1619,8 +1650,20 @@ static struct usb_function_instance *ncm_alloc_inst(void)
kfree(opts);
return ERR_CAST(net);
}
+ INIT_LIST_HEAD(&opts->ncm_os_desc.ext_prop);
+
+ descs[0] = &opts->ncm_os_desc;
+ names[0] = "ncm";
config_group_init_type_name(&opts->func_inst.group, "", &ncm_func_type);
+ ncm_interf_group =
+ usb_os_desc_prepare_interf_dir(&opts->func_inst.group, 1, descs,
+ names, THIS_MODULE);
+ if (IS_ERR(ncm_interf_group)) {
+ ncm_free_inst(&opts->func_inst);
+ return ERR_CAST(ncm_interf_group);
+ }
+ opts->ncm_interf_group = ncm_interf_group;
return &opts->func_inst;
}
@@ -1646,6 +1689,9 @@ static void ncm_unbind(struct usb_configuration *c, struct usb_function *f)
hrtimer_cancel(&ncm->task_timer);
+ kfree(f->os_desc_table);
+ f->os_desc_n = 0;
+
ncm_string_defs[0].id = 0;
usb_free_all_descriptors(f);
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-01 12:36:21 +0000