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![Slark Xiao](/assets/img/avatar_default.png)
In pci_generic.c there is a 'mru_default' in struct mhi_pci_dev_info.
This value shall be used for whole mhi if it's given a value for a specific product.
But in function mhi_net_rx_refill_work(), it's still using hard code value MHI_DEFAULT_MRU.
'mru_default' shall have higher priority than MHI_DEFAULT_MRU.
And after checking, this change could help fix a data connection lost issue.
Fixes: 5c2c853159
("bus: mhi: pci-generic: configurable network interface MRU")
Signed-off-by: Shujun Wang <wsj20369@163.com>
Signed-off-by: Slark Xiao <slark_xiao@163.com>
Reviewed-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
658 lines
17 KiB
C
658 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* MHI MBIM Network driver - Network/MBIM over MHI bus
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*
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* Copyright (C) 2021 Linaro Ltd <loic.poulain@linaro.org>
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*
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* This driver copy some code from cdc_ncm, which is:
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* Copyright (C) ST-Ericsson 2010-2012
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* and cdc_mbim, which is:
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* Copyright (c) 2012 Smith Micro Software, Inc.
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* Copyright (c) 2012 Bjørn Mork <bjorn@mork.no>
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*
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*/
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#include <linux/ethtool.h>
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#include <linux/if_arp.h>
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#include <linux/if_vlan.h>
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#include <linux/ip.h>
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#include <linux/mhi.h>
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#include <linux/mii.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/skbuff.h>
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#include <linux/u64_stats_sync.h>
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#include <linux/usb.h>
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#include <linux/usb/cdc.h>
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#include <linux/usb/usbnet.h>
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#include <linux/usb/cdc_ncm.h>
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#include <linux/wwan.h>
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/* 3500 allows to optimize skb allocation, the skbs will basically fit in
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* one 4K page. Large MBIM packets will simply be split over several MHI
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* transfers and chained by the MHI net layer (zerocopy).
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*/
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#define MHI_DEFAULT_MRU 3500
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#define MHI_MBIM_DEFAULT_MTU 1500
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#define MHI_MAX_BUF_SZ 0xffff
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#define MBIM_NDP16_SIGN_MASK 0x00ffffff
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#define MHI_MBIM_LINK_HASH_SIZE 8
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#define LINK_HASH(session) ((session) % MHI_MBIM_LINK_HASH_SIZE)
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struct mhi_mbim_link {
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struct mhi_mbim_context *mbim;
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struct net_device *ndev;
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unsigned int session;
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/* stats */
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u64_stats_t rx_packets;
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u64_stats_t rx_bytes;
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u64_stats_t rx_errors;
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u64_stats_t tx_packets;
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u64_stats_t tx_bytes;
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u64_stats_t tx_errors;
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u64_stats_t tx_dropped;
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struct u64_stats_sync tx_syncp;
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struct u64_stats_sync rx_syncp;
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struct hlist_node hlnode;
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};
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struct mhi_mbim_context {
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struct mhi_device *mdev;
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struct sk_buff *skbagg_head;
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struct sk_buff *skbagg_tail;
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unsigned int mru;
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u32 rx_queue_sz;
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u16 rx_seq;
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u16 tx_seq;
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struct delayed_work rx_refill;
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spinlock_t tx_lock;
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struct hlist_head link_list[MHI_MBIM_LINK_HASH_SIZE];
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};
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struct mbim_tx_hdr {
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struct usb_cdc_ncm_nth16 nth16;
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struct usb_cdc_ncm_ndp16 ndp16;
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struct usb_cdc_ncm_dpe16 dpe16[2];
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} __packed;
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static struct mhi_mbim_link *mhi_mbim_get_link_rcu(struct mhi_mbim_context *mbim,
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unsigned int session)
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{
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struct mhi_mbim_link *link;
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hlist_for_each_entry_rcu(link, &mbim->link_list[LINK_HASH(session)], hlnode) {
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if (link->session == session)
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return link;
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}
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return NULL;
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}
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static struct sk_buff *mbim_tx_fixup(struct sk_buff *skb, unsigned int session,
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u16 tx_seq)
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{
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unsigned int dgram_size = skb->len;
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struct usb_cdc_ncm_nth16 *nth16;
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struct usb_cdc_ncm_ndp16 *ndp16;
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struct mbim_tx_hdr *mbim_hdr;
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/* Only one NDP is sent, containing the IP packet (no aggregation) */
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/* Ensure we have enough headroom for crafting MBIM header */
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if (skb_cow_head(skb, sizeof(struct mbim_tx_hdr))) {
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dev_kfree_skb_any(skb);
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return NULL;
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}
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mbim_hdr = skb_push(skb, sizeof(struct mbim_tx_hdr));
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/* Fill NTB header */
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nth16 = &mbim_hdr->nth16;
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nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
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nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));
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nth16->wSequence = cpu_to_le16(tx_seq);
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nth16->wBlockLength = cpu_to_le16(skb->len);
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nth16->wNdpIndex = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));
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/* Fill the unique NDP */
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ndp16 = &mbim_hdr->ndp16;
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ndp16->dwSignature = cpu_to_le32(USB_CDC_MBIM_NDP16_IPS_SIGN | (session << 24));
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ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16)
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+ sizeof(struct usb_cdc_ncm_dpe16) * 2);
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ndp16->wNextNdpIndex = 0;
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/* Datagram follows the mbim header */
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ndp16->dpe16[0].wDatagramIndex = cpu_to_le16(sizeof(struct mbim_tx_hdr));
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ndp16->dpe16[0].wDatagramLength = cpu_to_le16(dgram_size);
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/* null termination */
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ndp16->dpe16[1].wDatagramIndex = 0;
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ndp16->dpe16[1].wDatagramLength = 0;
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return skb;
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}
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static netdev_tx_t mhi_mbim_ndo_xmit(struct sk_buff *skb, struct net_device *ndev)
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{
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struct mhi_mbim_link *link = wwan_netdev_drvpriv(ndev);
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struct mhi_mbim_context *mbim = link->mbim;
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unsigned long flags;
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int err = -ENOMEM;
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/* Serialize MHI channel queuing and MBIM seq */
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spin_lock_irqsave(&mbim->tx_lock, flags);
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skb = mbim_tx_fixup(skb, link->session, mbim->tx_seq);
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if (unlikely(!skb))
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goto exit_unlock;
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err = mhi_queue_skb(mbim->mdev, DMA_TO_DEVICE, skb, skb->len, MHI_EOT);
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if (mhi_queue_is_full(mbim->mdev, DMA_TO_DEVICE))
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netif_stop_queue(ndev);
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if (!err)
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mbim->tx_seq++;
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exit_unlock:
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spin_unlock_irqrestore(&mbim->tx_lock, flags);
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if (unlikely(err)) {
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net_err_ratelimited("%s: Failed to queue TX buf (%d)\n",
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ndev->name, err);
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dev_kfree_skb_any(skb);
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goto exit_drop;
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}
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return NETDEV_TX_OK;
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exit_drop:
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u64_stats_update_begin(&link->tx_syncp);
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u64_stats_inc(&link->tx_dropped);
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u64_stats_update_end(&link->tx_syncp);
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return NETDEV_TX_OK;
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}
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static int mbim_rx_verify_nth16(struct mhi_mbim_context *mbim, struct sk_buff *skb)
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{
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struct usb_cdc_ncm_nth16 *nth16;
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int len;
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if (skb->len < sizeof(struct usb_cdc_ncm_nth16) +
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sizeof(struct usb_cdc_ncm_ndp16)) {
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net_err_ratelimited("frame too short\n");
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return -EINVAL;
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}
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nth16 = (struct usb_cdc_ncm_nth16 *)skb->data;
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if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) {
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net_err_ratelimited("invalid NTH16 signature <%#010x>\n",
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le32_to_cpu(nth16->dwSignature));
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return -EINVAL;
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}
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/* No limit on the block length, except the size of the data pkt */
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len = le16_to_cpu(nth16->wBlockLength);
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if (len > skb->len) {
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net_err_ratelimited("NTB does not fit into the skb %u/%u\n",
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len, skb->len);
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return -EINVAL;
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}
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if (mbim->rx_seq + 1 != le16_to_cpu(nth16->wSequence) &&
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(mbim->rx_seq || le16_to_cpu(nth16->wSequence)) &&
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!(mbim->rx_seq == 0xffff && !le16_to_cpu(nth16->wSequence))) {
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net_err_ratelimited("sequence number glitch prev=%d curr=%d\n",
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mbim->rx_seq, le16_to_cpu(nth16->wSequence));
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}
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mbim->rx_seq = le16_to_cpu(nth16->wSequence);
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return le16_to_cpu(nth16->wNdpIndex);
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}
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static int mbim_rx_verify_ndp16(struct sk_buff *skb, struct usb_cdc_ncm_ndp16 *ndp16)
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{
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int ret;
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if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) {
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net_err_ratelimited("invalid DPT16 length <%u>\n",
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le16_to_cpu(ndp16->wLength));
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return -EINVAL;
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}
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ret = ((le16_to_cpu(ndp16->wLength) - sizeof(struct usb_cdc_ncm_ndp16))
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/ sizeof(struct usb_cdc_ncm_dpe16));
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ret--; /* Last entry is always a NULL terminator */
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if (sizeof(struct usb_cdc_ncm_ndp16) +
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ret * sizeof(struct usb_cdc_ncm_dpe16) > skb->len) {
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net_err_ratelimited("Invalid nframes = %d\n", ret);
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return -EINVAL;
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}
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return ret;
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}
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static void mhi_mbim_rx(struct mhi_mbim_context *mbim, struct sk_buff *skb)
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{
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int ndpoffset;
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/* Check NTB header and retrieve first NDP offset */
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ndpoffset = mbim_rx_verify_nth16(mbim, skb);
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if (ndpoffset < 0) {
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net_err_ratelimited("mbim: Incorrect NTB header\n");
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goto error;
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}
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/* Process each NDP */
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while (1) {
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struct usb_cdc_ncm_ndp16 ndp16;
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struct usb_cdc_ncm_dpe16 dpe16;
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struct mhi_mbim_link *link;
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int nframes, n, dpeoffset;
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unsigned int session;
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if (skb_copy_bits(skb, ndpoffset, &ndp16, sizeof(ndp16))) {
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net_err_ratelimited("mbim: Incorrect NDP offset (%u)\n",
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ndpoffset);
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goto error;
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}
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/* Check NDP header and retrieve number of datagrams */
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nframes = mbim_rx_verify_ndp16(skb, &ndp16);
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if (nframes < 0) {
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net_err_ratelimited("mbim: Incorrect NDP16\n");
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goto error;
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}
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/* Only IP data type supported, no DSS in MHI context */
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if ((ndp16.dwSignature & cpu_to_le32(MBIM_NDP16_SIGN_MASK))
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!= cpu_to_le32(USB_CDC_MBIM_NDP16_IPS_SIGN)) {
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net_err_ratelimited("mbim: Unsupported NDP type\n");
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goto next_ndp;
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}
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session = (le32_to_cpu(ndp16.dwSignature) & ~MBIM_NDP16_SIGN_MASK) >> 24;
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rcu_read_lock();
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link = mhi_mbim_get_link_rcu(mbim, session);
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if (!link) {
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net_err_ratelimited("mbim: bad packet session (%u)\n", session);
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goto unlock;
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}
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/* de-aggregate and deliver IP packets */
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dpeoffset = ndpoffset + sizeof(struct usb_cdc_ncm_ndp16);
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for (n = 0; n < nframes; n++, dpeoffset += sizeof(dpe16)) {
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u16 dgram_offset, dgram_len;
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struct sk_buff *skbn;
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if (skb_copy_bits(skb, dpeoffset, &dpe16, sizeof(dpe16)))
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break;
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dgram_offset = le16_to_cpu(dpe16.wDatagramIndex);
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dgram_len = le16_to_cpu(dpe16.wDatagramLength);
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if (!dgram_offset || !dgram_len)
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break; /* null terminator */
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skbn = netdev_alloc_skb(link->ndev, dgram_len);
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if (!skbn)
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continue;
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skb_put(skbn, dgram_len);
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skb_copy_bits(skb, dgram_offset, skbn->data, dgram_len);
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switch (skbn->data[0] & 0xf0) {
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case 0x40:
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skbn->protocol = htons(ETH_P_IP);
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break;
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case 0x60:
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skbn->protocol = htons(ETH_P_IPV6);
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break;
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default:
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net_err_ratelimited("%s: unknown protocol\n",
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link->ndev->name);
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dev_kfree_skb_any(skbn);
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u64_stats_update_begin(&link->rx_syncp);
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u64_stats_inc(&link->rx_errors);
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u64_stats_update_end(&link->rx_syncp);
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continue;
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}
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u64_stats_update_begin(&link->rx_syncp);
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u64_stats_inc(&link->rx_packets);
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u64_stats_add(&link->rx_bytes, skbn->len);
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u64_stats_update_end(&link->rx_syncp);
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netif_rx(skbn);
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}
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unlock:
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rcu_read_unlock();
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next_ndp:
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/* Other NDP to process? */
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ndpoffset = (int)le16_to_cpu(ndp16.wNextNdpIndex);
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if (!ndpoffset)
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break;
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}
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/* free skb */
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dev_consume_skb_any(skb);
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return;
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error:
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dev_kfree_skb_any(skb);
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}
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static struct sk_buff *mhi_net_skb_agg(struct mhi_mbim_context *mbim,
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struct sk_buff *skb)
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{
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struct sk_buff *head = mbim->skbagg_head;
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struct sk_buff *tail = mbim->skbagg_tail;
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/* This is non-paged skb chaining using frag_list */
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if (!head) {
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mbim->skbagg_head = skb;
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return skb;
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}
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if (!skb_shinfo(head)->frag_list)
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skb_shinfo(head)->frag_list = skb;
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else
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tail->next = skb;
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head->len += skb->len;
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head->data_len += skb->len;
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head->truesize += skb->truesize;
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mbim->skbagg_tail = skb;
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return mbim->skbagg_head;
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}
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static void mhi_net_rx_refill_work(struct work_struct *work)
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{
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struct mhi_mbim_context *mbim = container_of(work, struct mhi_mbim_context,
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rx_refill.work);
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struct mhi_device *mdev = mbim->mdev;
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int err;
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while (!mhi_queue_is_full(mdev, DMA_FROM_DEVICE)) {
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struct sk_buff *skb = alloc_skb(mbim->mru, GFP_KERNEL);
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if (unlikely(!skb))
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break;
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err = mhi_queue_skb(mdev, DMA_FROM_DEVICE, skb,
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mbim->mru, MHI_EOT);
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if (unlikely(err)) {
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kfree_skb(skb);
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break;
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}
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/* Do not hog the CPU if rx buffers are consumed faster than
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* queued (unlikely).
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*/
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cond_resched();
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}
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/* If we're still starved of rx buffers, reschedule later */
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if (mhi_get_free_desc_count(mdev, DMA_FROM_DEVICE) == mbim->rx_queue_sz)
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schedule_delayed_work(&mbim->rx_refill, HZ / 2);
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}
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static void mhi_mbim_dl_callback(struct mhi_device *mhi_dev,
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struct mhi_result *mhi_res)
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{
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struct mhi_mbim_context *mbim = dev_get_drvdata(&mhi_dev->dev);
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struct sk_buff *skb = mhi_res->buf_addr;
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int free_desc_count;
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free_desc_count = mhi_get_free_desc_count(mhi_dev, DMA_FROM_DEVICE);
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if (unlikely(mhi_res->transaction_status)) {
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switch (mhi_res->transaction_status) {
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case -EOVERFLOW:
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/* Packet has been split over multiple transfers */
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skb_put(skb, mhi_res->bytes_xferd);
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mhi_net_skb_agg(mbim, skb);
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break;
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case -ENOTCONN:
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/* MHI layer stopping/resetting the DL channel */
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dev_kfree_skb_any(skb);
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return;
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default:
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/* Unknown error, simply drop */
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dev_kfree_skb_any(skb);
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}
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} else {
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skb_put(skb, mhi_res->bytes_xferd);
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if (mbim->skbagg_head) {
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/* Aggregate the final fragment */
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skb = mhi_net_skb_agg(mbim, skb);
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mbim->skbagg_head = NULL;
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}
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mhi_mbim_rx(mbim, skb);
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}
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/* Refill if RX buffers queue becomes low */
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if (free_desc_count >= mbim->rx_queue_sz / 2)
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schedule_delayed_work(&mbim->rx_refill, 0);
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}
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static void mhi_mbim_ndo_get_stats64(struct net_device *ndev,
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struct rtnl_link_stats64 *stats)
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{
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struct mhi_mbim_link *link = wwan_netdev_drvpriv(ndev);
|
|
unsigned int start;
|
|
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&link->rx_syncp);
|
|
stats->rx_packets = u64_stats_read(&link->rx_packets);
|
|
stats->rx_bytes = u64_stats_read(&link->rx_bytes);
|
|
stats->rx_errors = u64_stats_read(&link->rx_errors);
|
|
} while (u64_stats_fetch_retry_irq(&link->rx_syncp, start));
|
|
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&link->tx_syncp);
|
|
stats->tx_packets = u64_stats_read(&link->tx_packets);
|
|
stats->tx_bytes = u64_stats_read(&link->tx_bytes);
|
|
stats->tx_errors = u64_stats_read(&link->tx_errors);
|
|
stats->tx_dropped = u64_stats_read(&link->tx_dropped);
|
|
} while (u64_stats_fetch_retry_irq(&link->tx_syncp, start));
|
|
}
|
|
|
|
static void mhi_mbim_ul_callback(struct mhi_device *mhi_dev,
|
|
struct mhi_result *mhi_res)
|
|
{
|
|
struct mhi_mbim_context *mbim = dev_get_drvdata(&mhi_dev->dev);
|
|
struct sk_buff *skb = mhi_res->buf_addr;
|
|
struct net_device *ndev = skb->dev;
|
|
struct mhi_mbim_link *link = wwan_netdev_drvpriv(ndev);
|
|
|
|
/* Hardware has consumed the buffer, so free the skb (which is not
|
|
* freed by the MHI stack) and perform accounting.
|
|
*/
|
|
dev_consume_skb_any(skb);
|
|
|
|
u64_stats_update_begin(&link->tx_syncp);
|
|
if (unlikely(mhi_res->transaction_status)) {
|
|
/* MHI layer stopping/resetting the UL channel */
|
|
if (mhi_res->transaction_status == -ENOTCONN) {
|
|
u64_stats_update_end(&link->tx_syncp);
|
|
return;
|
|
}
|
|
|
|
u64_stats_inc(&link->tx_errors);
|
|
} else {
|
|
u64_stats_inc(&link->tx_packets);
|
|
u64_stats_add(&link->tx_bytes, mhi_res->bytes_xferd);
|
|
}
|
|
u64_stats_update_end(&link->tx_syncp);
|
|
|
|
if (netif_queue_stopped(ndev) && !mhi_queue_is_full(mbim->mdev, DMA_TO_DEVICE))
|
|
netif_wake_queue(ndev);
|
|
}
|
|
|
|
static int mhi_mbim_ndo_open(struct net_device *ndev)
|
|
{
|
|
struct mhi_mbim_link *link = wwan_netdev_drvpriv(ndev);
|
|
|
|
/* Feed the MHI rx buffer pool */
|
|
schedule_delayed_work(&link->mbim->rx_refill, 0);
|
|
|
|
/* Carrier is established via out-of-band channel (e.g. qmi) */
|
|
netif_carrier_on(ndev);
|
|
|
|
netif_start_queue(ndev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mhi_mbim_ndo_stop(struct net_device *ndev)
|
|
{
|
|
netif_stop_queue(ndev);
|
|
netif_carrier_off(ndev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct net_device_ops mhi_mbim_ndo = {
|
|
.ndo_open = mhi_mbim_ndo_open,
|
|
.ndo_stop = mhi_mbim_ndo_stop,
|
|
.ndo_start_xmit = mhi_mbim_ndo_xmit,
|
|
.ndo_get_stats64 = mhi_mbim_ndo_get_stats64,
|
|
};
|
|
|
|
static int mhi_mbim_newlink(void *ctxt, struct net_device *ndev, u32 if_id,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct mhi_mbim_link *link = wwan_netdev_drvpriv(ndev);
|
|
struct mhi_mbim_context *mbim = ctxt;
|
|
|
|
link->session = if_id;
|
|
link->mbim = mbim;
|
|
link->ndev = ndev;
|
|
u64_stats_init(&link->rx_syncp);
|
|
u64_stats_init(&link->tx_syncp);
|
|
|
|
rcu_read_lock();
|
|
if (mhi_mbim_get_link_rcu(mbim, if_id)) {
|
|
rcu_read_unlock();
|
|
return -EEXIST;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
/* Already protected by RTNL lock */
|
|
hlist_add_head_rcu(&link->hlnode, &mbim->link_list[LINK_HASH(if_id)]);
|
|
|
|
return register_netdevice(ndev);
|
|
}
|
|
|
|
static void mhi_mbim_dellink(void *ctxt, struct net_device *ndev,
|
|
struct list_head *head)
|
|
{
|
|
struct mhi_mbim_link *link = wwan_netdev_drvpriv(ndev);
|
|
|
|
hlist_del_init_rcu(&link->hlnode);
|
|
synchronize_rcu();
|
|
|
|
unregister_netdevice_queue(ndev, head);
|
|
}
|
|
|
|
static void mhi_mbim_setup(struct net_device *ndev)
|
|
{
|
|
ndev->header_ops = NULL; /* No header */
|
|
ndev->type = ARPHRD_RAWIP;
|
|
ndev->needed_headroom = sizeof(struct mbim_tx_hdr);
|
|
ndev->hard_header_len = 0;
|
|
ndev->addr_len = 0;
|
|
ndev->flags = IFF_POINTOPOINT | IFF_NOARP;
|
|
ndev->netdev_ops = &mhi_mbim_ndo;
|
|
ndev->mtu = MHI_MBIM_DEFAULT_MTU;
|
|
ndev->min_mtu = ETH_MIN_MTU;
|
|
ndev->max_mtu = MHI_MAX_BUF_SZ - ndev->needed_headroom;
|
|
ndev->tx_queue_len = 1000;
|
|
}
|
|
|
|
static const struct wwan_ops mhi_mbim_wwan_ops = {
|
|
.priv_size = sizeof(struct mhi_mbim_link),
|
|
.setup = mhi_mbim_setup,
|
|
.newlink = mhi_mbim_newlink,
|
|
.dellink = mhi_mbim_dellink,
|
|
};
|
|
|
|
static int mhi_mbim_probe(struct mhi_device *mhi_dev, const struct mhi_device_id *id)
|
|
{
|
|
struct mhi_controller *cntrl = mhi_dev->mhi_cntrl;
|
|
struct mhi_mbim_context *mbim;
|
|
int err;
|
|
|
|
mbim = devm_kzalloc(&mhi_dev->dev, sizeof(*mbim), GFP_KERNEL);
|
|
if (!mbim)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&mbim->tx_lock);
|
|
dev_set_drvdata(&mhi_dev->dev, mbim);
|
|
mbim->mdev = mhi_dev;
|
|
mbim->mru = mhi_dev->mhi_cntrl->mru ? mhi_dev->mhi_cntrl->mru : MHI_DEFAULT_MRU;
|
|
|
|
INIT_DELAYED_WORK(&mbim->rx_refill, mhi_net_rx_refill_work);
|
|
|
|
/* Start MHI channels */
|
|
err = mhi_prepare_for_transfer(mhi_dev);
|
|
if (err)
|
|
return err;
|
|
|
|
/* Number of transfer descriptors determines size of the queue */
|
|
mbim->rx_queue_sz = mhi_get_free_desc_count(mhi_dev, DMA_FROM_DEVICE);
|
|
|
|
/* Register wwan link ops with MHI controller representing WWAN instance */
|
|
return wwan_register_ops(&cntrl->mhi_dev->dev, &mhi_mbim_wwan_ops, mbim, 0);
|
|
}
|
|
|
|
static void mhi_mbim_remove(struct mhi_device *mhi_dev)
|
|
{
|
|
struct mhi_mbim_context *mbim = dev_get_drvdata(&mhi_dev->dev);
|
|
struct mhi_controller *cntrl = mhi_dev->mhi_cntrl;
|
|
|
|
mhi_unprepare_from_transfer(mhi_dev);
|
|
cancel_delayed_work_sync(&mbim->rx_refill);
|
|
wwan_unregister_ops(&cntrl->mhi_dev->dev);
|
|
kfree_skb(mbim->skbagg_head);
|
|
dev_set_drvdata(&mhi_dev->dev, NULL);
|
|
}
|
|
|
|
static const struct mhi_device_id mhi_mbim_id_table[] = {
|
|
/* Hardware accelerated data PATH (to modem IPA), MBIM protocol */
|
|
{ .chan = "IP_HW0_MBIM", .driver_data = 0 },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(mhi, mhi_mbim_id_table);
|
|
|
|
static struct mhi_driver mhi_mbim_driver = {
|
|
.probe = mhi_mbim_probe,
|
|
.remove = mhi_mbim_remove,
|
|
.dl_xfer_cb = mhi_mbim_dl_callback,
|
|
.ul_xfer_cb = mhi_mbim_ul_callback,
|
|
.id_table = mhi_mbim_id_table,
|
|
.driver = {
|
|
.name = "mhi_wwan_mbim",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
module_mhi_driver(mhi_mbim_driver);
|
|
|
|
MODULE_AUTHOR("Loic Poulain <loic.poulain@linaro.org>");
|
|
MODULE_DESCRIPTION("Network/MBIM over MHI");
|
|
MODULE_LICENSE("GPL v2");
|