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android / kernel / msm.git / 673810b5b743d561ee04c7cd82f9eac33187008c / . / drivers / platform / msm / ipa / rmnet_ipa.c
blob: a149a9eb4f7b331e44cb08de3fa0c0336b1c634f [file] [log] [blame]
/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
/*
* WWAN Transport Network Driver.
*/
#include <linux/completion.h>
#include <linux/errno.h>
#include <linux/if_arp.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/of_device.h>
#include <linux/string.h>
#include <linux/skbuff.h>
#include <linux/workqueue.h>
#include <net/pkt_sched.h>
#include <soc/qcom/subsystem_restart.h>
#include <soc/qcom/subsystem_notif.h>
#include "ipa_qmi_service.h"
#define WWAN_METADATA_SHFT 24
#define WWAN_METADATA_MASK 0xFF000000
#define WWAN_DATA_LEN 2000
#define IPA_RM_INACTIVITY_TIMER 100 /* IPA_RM */
#define HEADROOM_FOR_QMAP 8 /* for mux header */
#define TAILROOM 0 /* for padding by mux layer */
#define MAX_NUM_OF_MUX_CHANNEL 10 /* max mux channels */
#define UL_FILTER_RULE_HANDLE_START 69
#define DEFAULT_OUTSTANDING_HIGH 64
#define DEFAULT_OUTSTANDING_LOW 32
#define IPA_WWAN_DEV_NAME "rmnet_ipa%d"
#define IPA_WWAN_DEVICE_COUNT (1)
static struct net_device *ipa_netdevs[IPA_WWAN_DEVICE_COUNT];
static struct ipa_sys_connect_params apps_to_ipa_ep_cfg, ipa_to_apps_ep_cfg;
static u32 qmap_hdr_hdl, dflt_v4_wan_rt_hdl, dflt_v6_wan_rt_hdl;
static struct rmnet_mux_val mux_channel[MAX_NUM_OF_MUX_CHANNEL];
static int num_q6_rule, old_num_q6_rule;
static int rmnet_index;
static bool egress_set, a7_ul_flt_set;
static struct workqueue_struct *ipa_rm_q6_workqueue; /* IPA_RM workqueue*/
static atomic_t is_initialized;
static atomic_t is_ssr;
u32 apps_to_ipa_hdl, ipa_to_apps_hdl; /* get handler from ipa */
static int wwan_add_ul_flt_rule_to_ipa(void);
static int wwan_del_ul_flt_rule_to_ipa(void);
static void wake_tx_queue(struct work_struct *work);
static DECLARE_WORK(ipa_tx_wakequeue_work, wake_tx_queue);
enum wwan_device_status {
WWAN_DEVICE_INACTIVE = 0,
WWAN_DEVICE_ACTIVE = 1
};
struct ipa_rmnet_plat_drv_res {
bool ipa_rmnet_ssr;
bool ipa_loaduC;
};
/**
* struct wwan_private - WWAN private data
* @net: network interface struct implemented by this driver
* @stats: iface statistics
* @outstanding_pkts: number of packets sent to IPA without TX complete ACKed
* @outstanding_high: number of outstanding packets allowed
* @outstanding_low: number of outstanding packets which shall cause
* @ch_id: channel id
* @lock: spinlock for mutual exclusion
* @device_status: holds device status
*
* WWAN private - holds all relevant info about WWAN driver
*/
struct wwan_private {
struct net_device *net;
struct net_device_stats stats;
atomic_t outstanding_pkts;
int outstanding_high;
int outstanding_low;
uint32_t ch_id;
spinlock_t lock;
struct completion resource_granted_completion;
enum wwan_device_status device_status;
};
/**
* ipa_setup_a7_qmap_hdr() - Setup default a7 qmap hdr
*
* Return codes:
* 0: success
* -ENOMEM: failed to allocate memory
* -EPERM: failed to add the tables
*/
static int ipa_setup_a7_qmap_hdr(void)
{
struct ipa_ioc_add_hdr *hdr;
struct ipa_hdr_add *hdr_entry;
u32 pyld_sz;
int ret;
/* install the basic exception header */
pyld_sz = sizeof(struct ipa_ioc_add_hdr) + 1 *
sizeof(struct ipa_hdr_add);
hdr = kzalloc(pyld_sz, GFP_KERNEL);
if (!hdr) {
IPAWANERR("fail to alloc exception hdr\n");
return -ENOMEM;
}
hdr->num_hdrs = 1;
hdr->commit = 1;
hdr_entry = &hdr->hdr[0];
strlcpy(hdr_entry->name, IPA_A7_QMAP_HDR_NAME,
IPA_RESOURCE_NAME_MAX);
hdr_entry->hdr_len = IPA_QMAP_HEADER_LENGTH; /* 4 bytes */
if (ipa_add_hdr(hdr)) {
IPAWANERR("fail to add IPA_A7_QMAP hdr\n");
ret = -EPERM;
goto bail;
}
if (hdr_entry->status) {
IPAWANERR("fail to add IPA_A7_QMAP hdr\n");
ret = -EPERM;
goto bail;
}
qmap_hdr_hdl = hdr_entry->hdr_hdl;
ret = 0;
bail:
kfree(hdr);
return ret;
}
static void ipa_del_a7_qmap_hdr(void)
{
struct ipa_ioc_del_hdr *del_hdr;
struct ipa_hdr_del *hdl_entry;
u32 pyld_sz;
int ret;
pyld_sz = sizeof(struct ipa_ioc_del_hdr) + 1 *
sizeof(struct ipa_hdr_del);
del_hdr = kzalloc(pyld_sz, GFP_KERNEL);
if (!del_hdr) {
IPAWANERR("fail to alloc exception hdr_del\n");
return;
}
del_hdr->commit = 1;
del_hdr->num_hdls = 1;
hdl_entry = &del_hdr->hdl[0];
hdl_entry->hdl = qmap_hdr_hdl;
ret = ipa_del_hdr(del_hdr);
if (ret || hdl_entry->status)
IPAWANERR("ipa_del_hdr failed\n");
else
IPAWANDBG("hdrs deletion done\n");
qmap_hdr_hdl = 0;
kfree(del_hdr);
}
static void ipa_del_qmap_hdr(uint32_t hdr_hdl)
{
struct ipa_ioc_del_hdr *del_hdr;
struct ipa_hdr_del *hdl_entry;
u32 pyld_sz;
int ret;
if (hdr_hdl == 0) {
IPAWANERR("Invalid hdr_hdl provided\n");
return;
}
pyld_sz = sizeof(struct ipa_ioc_del_hdr) + 1 *
sizeof(struct ipa_hdr_del);
del_hdr = kzalloc(pyld_sz, GFP_KERNEL);
if (!del_hdr) {
IPAWANERR("fail to alloc exception hdr_del\n");
return;
}
del_hdr->commit = 1;
del_hdr->num_hdls = 1;
hdl_entry = &del_hdr->hdl[0];
hdl_entry->hdl = hdr_hdl;
ret = ipa_del_hdr(del_hdr);
if (ret || hdl_entry->status)
IPAWANERR("ipa_del_hdr failed\n");
else
IPAWANDBG("header deletion done\n");
qmap_hdr_hdl = 0;
kfree(del_hdr);
}
static void ipa_del_mux_qmap_hdrs(void)
{
int index;
for (index = 0; index < rmnet_index; index++) {
ipa_del_qmap_hdr(mux_channel[index].hdr_hdl);
mux_channel[index].hdr_hdl = 0;
}
}
static int ipa_add_qmap_hdr(uint32_t mux_id, uint32_t *hdr_hdl)
{
struct ipa_ioc_add_hdr *hdr;
struct ipa_hdr_add *hdr_entry;
char hdr_name[IPA_RESOURCE_NAME_MAX];
u32 pyld_sz;
int ret;
pyld_sz = sizeof(struct ipa_ioc_add_hdr) + 1 *
sizeof(struct ipa_hdr_add);
hdr = kzalloc(pyld_sz, GFP_KERNEL);
if (!hdr) {
IPAWANERR("fail to alloc exception hdr\n");
return -ENOMEM;
}
hdr->num_hdrs = 1;
hdr->commit = 1;
hdr_entry = &hdr->hdr[0];
snprintf(hdr_name, IPA_RESOURCE_NAME_MAX, "%s%d",
A2_MUX_HDR_NAME_V4_PREF,
mux_id);
strlcpy(hdr_entry->name, hdr_name,
IPA_RESOURCE_NAME_MAX);
hdr_entry->hdr_len = IPA_QMAP_HEADER_LENGTH; /* 4 bytes */
hdr_entry->hdr[1] = (uint8_t) mux_id;
IPAWANDBG("header (%s) with mux-id: (%d)\n",
hdr_name,
hdr_entry->hdr[1]);
if (ipa_add_hdr(hdr)) {
IPAWANERR("fail to add IPA_QMAP hdr\n");
ret = -EPERM;
goto bail;
}
if (hdr_entry->status) {
IPAWANERR("fail to add IPA_QMAP hdr\n");
ret = -EPERM;
goto bail;
}
ret = 0;
*hdr_hdl = hdr_entry->hdr_hdl;
bail:
kfree(hdr);
return ret;
}
/**
* ipa_setup_dflt_wan_rt_tables() - Setup default wan routing tables
*
* Return codes:
* 0: success
* -ENOMEM: failed to allocate memory
* -EPERM: failed to add the tables
*/
static int ipa_setup_dflt_wan_rt_tables(void)
{
struct ipa_ioc_add_rt_rule *rt_rule;
struct ipa_rt_rule_add *rt_rule_entry;
rt_rule =
kzalloc(sizeof(struct ipa_ioc_add_rt_rule) + 1 *
sizeof(struct ipa_rt_rule_add), GFP_KERNEL);
if (!rt_rule) {
IPAWANERR("fail to alloc mem\n");
return -ENOMEM;
}
/* setup a default v4 route to point to Apps */
rt_rule->num_rules = 1;
rt_rule->commit = 1;
rt_rule->ip = IPA_IP_v4;
strlcpy(rt_rule->rt_tbl_name, IPA_DFLT_WAN_RT_TBL_NAME,
IPA_RESOURCE_NAME_MAX);
rt_rule_entry = &rt_rule->rules[0];
rt_rule_entry->at_rear = 1;
rt_rule_entry->rule.dst = IPA_CLIENT_APPS_WAN_CONS;
rt_rule_entry->rule.hdr_hdl = qmap_hdr_hdl;
if (ipa_add_rt_rule(rt_rule)) {
IPAWANERR("fail to add dflt_wan v4 rule\n");
kfree(rt_rule);
return -EPERM;
}
IPAWANDBG("dflt v4 rt rule hdl=%x\n", rt_rule_entry->rt_rule_hdl);
dflt_v4_wan_rt_hdl = rt_rule_entry->rt_rule_hdl;
/* setup a default v6 route to point to A5 */
rt_rule->ip = IPA_IP_v6;
if (ipa_add_rt_rule(rt_rule)) {
IPAWANERR("fail to add dflt_wan v6 rule\n");
kfree(rt_rule);
return -EPERM;
}
IPAWANDBG("dflt v6 rt rule hdl=%x\n", rt_rule_entry->rt_rule_hdl);
dflt_v6_wan_rt_hdl = rt_rule_entry->rt_rule_hdl;
kfree(rt_rule);
return 0;
}
static void ipa_del_dflt_wan_rt_tables(void)
{
struct ipa_ioc_del_rt_rule *rt_rule;
struct ipa_rt_rule_del *rt_rule_entry;
int len;
len = sizeof(struct ipa_ioc_del_rt_rule) + 1 *
sizeof(struct ipa_rt_rule_del);
rt_rule = kzalloc(len, GFP_KERNEL);
if (!rt_rule) {
IPAWANERR("unable to allocate memory for del route rule\n");
return;
}
memset(rt_rule, 0, len);
rt_rule->commit = 1;
rt_rule->num_hdls = 1;
rt_rule->ip = IPA_IP_v4;
rt_rule_entry = &rt_rule->hdl[0];
rt_rule_entry->status = -1;
rt_rule_entry->hdl = dflt_v4_wan_rt_hdl;
IPAWANERR("Deleting Route hdl:(0x%x) with ip type: %d\n",
rt_rule_entry->hdl, IPA_IP_v4);
if (ipa_del_rt_rule(rt_rule) ||
(rt_rule_entry->status)) {
IPAWANERR("Routing rule deletion failed!\n");
}
rt_rule->ip = IPA_IP_v6;
rt_rule_entry->hdl = dflt_v6_wan_rt_hdl;
IPAWANERR("Deleting Route hdl:(0x%x) with ip type: %d\n",
rt_rule_entry->hdl, IPA_IP_v6);
if (ipa_del_rt_rule(rt_rule) ||
(rt_rule_entry->status)) {
IPAWANERR("Routing rule deletion failed!\n");
}
kfree(rt_rule);
}
int copy_ul_filter_rule_to_ipa(struct ipa_install_fltr_rule_req_msg_v01
*rule_req, uint32_t *rule_hdl)
{
int rc = 0, i, j;
if (rule_req->filter_spec_list_valid == true) {
num_q6_rule = rule_req->filter_spec_list_len;
IPAWANDBG("Received (%d) install_flt_req\n", num_q6_rule);
} else {
num_q6_rule = 0;
IPAWANERR("got no UL rules from modem\n");
return -EINVAL;
}
/* copy UL filter rules from Modem*/
for (i = 0; i < num_q6_rule; i++) {
/* check if rules overside the cache*/
if (i == MAX_NUM_Q6_RULE) {
IPAWANERR("Reaching (%d) max cache ",
MAX_NUM_Q6_RULE);
IPAWANERR(" however total (%d)\n",
num_q6_rule);
break;
}
/* construct UL_filter_rule handler QMI use-cas */
ipa_qmi_ctx->q6_ul_filter_rule[i].filter_hdl =
UL_FILTER_RULE_HANDLE_START + i;
rule_hdl[i] = ipa_qmi_ctx->q6_ul_filter_rule[i].filter_hdl;
ipa_qmi_ctx->q6_ul_filter_rule[i].ip =
rule_req->filter_spec_list[i].ip_type;
ipa_qmi_ctx->q6_ul_filter_rule[i].action =
rule_req->filter_spec_list[i].filter_action;
if (rule_req->filter_spec_list[i].is_routing_table_index_valid
== true)
ipa_qmi_ctx->q6_ul_filter_rule[i].rt_tbl_idx =
rule_req->filter_spec_list[i].route_table_index;
if (rule_req->filter_spec_list[i].is_mux_id_valid == true)
ipa_qmi_ctx->q6_ul_filter_rule[i].mux_id =
rule_req->filter_spec_list[i].mux_id;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.rule_eq_bitmap =
rule_req->filter_spec_list[i].filter_rule.
rule_eq_bitmap;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.tos_eq_present =
rule_req->filter_spec_list[i].filter_rule.
tos_eq_present;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.tos_eq =
rule_req->filter_spec_list[i].filter_rule.tos_eq;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
protocol_eq_present = rule_req->filter_spec_list[i].
filter_rule.protocol_eq_present;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.protocol_eq =
rule_req->filter_spec_list[i].filter_rule.
protocol_eq;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
num_ihl_offset_range_16 = rule_req->filter_spec_list[i].
filter_rule.num_ihl_offset_range_16;
for (j = 0; j < ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
num_ihl_offset_range_16; j++) {
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
ihl_offset_range_16[j].offset = rule_req->
filter_spec_list[i].filter_rule.
ihl_offset_range_16[j].offset;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
ihl_offset_range_16[j].range_low = rule_req->
filter_spec_list[i].filter_rule.
ihl_offset_range_16[j].range_low;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
ihl_offset_range_16[j].range_high = rule_req->
filter_spec_list[i].filter_rule.
ihl_offset_range_16[j].range_high;
}
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.num_offset_meq_32 =
rule_req->filter_spec_list[i].filter_rule.
num_offset_meq_32;
for (j = 0; j < ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
num_offset_meq_32; j++) {
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
offset_meq_32[j].offset = rule_req->filter_spec_list[i].
filter_rule.offset_meq_32[j].offset;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
offset_meq_32[j].mask = rule_req->filter_spec_list[i].
filter_rule.offset_meq_32[j].mask;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
offset_meq_32[j].value = rule_req->filter_spec_list[i].
filter_rule.offset_meq_32[j].value;
}
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.tc_eq_present =
rule_req->filter_spec_list[i].filter_rule.tc_eq_present;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.tc_eq =
rule_req->filter_spec_list[i].filter_rule.tc_eq;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.fl_eq_present =
rule_req->filter_spec_list[i].filter_rule.
flow_eq_present;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.fl_eq =
rule_req->filter_spec_list[i].filter_rule.flow_eq;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
ihl_offset_eq_16_present = rule_req->filter_spec_list[i].
filter_rule.ihl_offset_eq_16_present;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
ihl_offset_eq_16.offset = rule_req->filter_spec_list[i].
filter_rule.ihl_offset_eq_16.offset;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
ihl_offset_eq_16.value = rule_req->filter_spec_list[i].
filter_rule.ihl_offset_eq_16.value;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
ihl_offset_eq_32_present = rule_req->filter_spec_list[i].
filter_rule.ihl_offset_eq_32_present;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
ihl_offset_eq_32.offset = rule_req->filter_spec_list[i].
filter_rule.ihl_offset_eq_32.offset;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
ihl_offset_eq_32.value = rule_req->filter_spec_list[i].
filter_rule.ihl_offset_eq_32.value;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
num_ihl_offset_meq_32 = rule_req->filter_spec_list[i].
filter_rule.num_ihl_offset_meq_32;
for (j = 0; j < ipa_qmi_ctx->q6_ul_filter_rule[i].
eq_attrib.num_ihl_offset_meq_32; j++) {
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
ihl_offset_meq_32[j].offset = rule_req->
filter_spec_list[i].filter_rule.
ihl_offset_meq_32[j].offset;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
ihl_offset_meq_32[j].mask = rule_req->
filter_spec_list[i].filter_rule.
ihl_offset_meq_32[j].mask;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
ihl_offset_meq_32[j].value = rule_req->
filter_spec_list[i].filter_rule.
ihl_offset_meq_32[j].value;
}
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.num_offset_meq_128 =
rule_req->filter_spec_list[i].filter_rule.
num_offset_meq_128;
for (j = 0; j < ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
num_offset_meq_128; j++) {
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
offset_meq_128[j].offset = rule_req->
filter_spec_list[i].filter_rule.
offset_meq_128[j].offset;
memcpy(ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
offset_meq_128[j].mask,
rule_req->filter_spec_list[i].
filter_rule.offset_meq_128[j].mask, 16);
memcpy(ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
offset_meq_128[j].value, rule_req->
filter_spec_list[i].filter_rule.
offset_meq_128[j].value, 16);
}
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
metadata_meq32_present = rule_req->filter_spec_list[i].
filter_rule.metadata_meq32_present;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
metadata_meq32.offset = rule_req->filter_spec_list[i].
filter_rule.metadata_meq32.offset;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
metadata_meq32.mask = rule_req->filter_spec_list[i].
filter_rule.metadata_meq32.mask;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.metadata_meq32.
value = rule_req->filter_spec_list[i].filter_rule.
metadata_meq32.value;
ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib.
ipv4_frag_eq_present = rule_req->filter_spec_list[i].
filter_rule.ipv4_frag_eq_present;
}
return rc;
}
static int wwan_add_ul_flt_rule_to_ipa(void)
{
u32 pyld_sz;
int i, retval = 0;
int num_v4_rule = 0, num_v6_rule = 0;
struct ipa_ioc_add_flt_rule *param;
struct ipa_flt_rule_add flt_rule_entry;
struct ipa_fltr_installed_notif_req_msg_v01 req;
pyld_sz = sizeof(struct ipa_ioc_add_flt_rule) +
sizeof(struct ipa_flt_rule_add);
param = kzalloc(pyld_sz, GFP_KERNEL);
if (!param)
return -ENOMEM;
param->commit = 1;
param->ep = IPA_CLIENT_APPS_LAN_WAN_PROD;
param->global = false;
param->num_rules = (uint8_t)1;
for (i = 0; i < num_q6_rule; i++) {
param->ip = ipa_qmi_ctx->q6_ul_filter_rule[i].ip;
memset(&flt_rule_entry, 0, sizeof(struct ipa_flt_rule_add));
flt_rule_entry.at_rear = true;
flt_rule_entry.rule.action =
ipa_qmi_ctx->q6_ul_filter_rule[i].action;
flt_rule_entry.rule.rt_tbl_idx
= ipa_qmi_ctx->q6_ul_filter_rule[i].rt_tbl_idx;
flt_rule_entry.rule.retain_hdr = true;
/* debug rt-hdl*/
IPAWANDBG("install-IPA index(%d),rt-tbl:(%d)\n",
i, flt_rule_entry.rule.rt_tbl_idx);
flt_rule_entry.rule.eq_attrib_type = true;
memcpy(&(flt_rule_entry.rule.eq_attrib),
&ipa_qmi_ctx->q6_ul_filter_rule[i].eq_attrib,
sizeof(struct ipa_ipfltri_rule_eq));
memcpy(&(param->rules[0]), &flt_rule_entry,
sizeof(struct ipa_flt_rule_add));
if (ipa_add_flt_rule((struct ipa_ioc_add_flt_rule *)param)) {
retval = -EFAULT;
IPAWANERR("add A7 UL filter rule(%d) failed\n", i);
} else {
/* store the rule handler */
ipa_qmi_ctx->q6_ul_filter_rule_hdl[i] =
param->rules[0].flt_rule_hdl;
}
}
/* send ipa_fltr_installed_notif_req_msg_v01 to Q6*/
memset(&req, 0, sizeof(struct ipa_fltr_installed_notif_req_msg_v01));
req.source_pipe_index =
ipa_get_ep_mapping(IPA_CLIENT_APPS_LAN_WAN_PROD);
req.install_status = QMI_RESULT_SUCCESS_V01;
req.filter_index_list_len = num_q6_rule;
for (i = 0; i < num_q6_rule; i++) {
if (ipa_qmi_ctx->q6_ul_filter_rule[i].ip == IPA_IP_v4) {
req.filter_index_list[i].filter_index = num_v4_rule;
num_v4_rule++;
} else {
req.filter_index_list[i].filter_index = num_v6_rule;
num_v6_rule++;
}
req.filter_index_list[i].filter_handle =
ipa_qmi_ctx->q6_ul_filter_rule[i].filter_hdl;
}
if (qmi_filter_notify_send(&req)) {
IPAWANDBG("add filter rule index on A7-RX failed\n");
retval = -EFAULT;
}
old_num_q6_rule = num_q6_rule;
IPAWANDBG("add (%d) filter rule index on A7-RX\n",
old_num_q6_rule);
kfree(param);
return retval;
}
static int wwan_del_ul_flt_rule_to_ipa(void)
{
u32 pyld_sz;
int i, retval = 0;
struct ipa_ioc_del_flt_rule *param;
struct ipa_flt_rule_del flt_rule_entry;
pyld_sz = sizeof(struct ipa_ioc_del_flt_rule) +
sizeof(struct ipa_flt_rule_del);
param = kzalloc(pyld_sz, GFP_KERNEL);
if (!param) {
IPAWANERR("kzalloc failed\n");
return -ENOMEM;
}
param->commit = 1;
param->num_hdls = (uint8_t) 1;
for (i = 0; i < old_num_q6_rule; i++) {
param->ip = ipa_qmi_ctx->q6_ul_filter_rule[i].ip;
memset(&flt_rule_entry, 0, sizeof(struct ipa_flt_rule_del));
flt_rule_entry.hdl = ipa_qmi_ctx->q6_ul_filter_rule_hdl[i];
/* debug rt-hdl*/
IPAWANDBG("delete-IPA rule index(%d)\n", i);
memcpy(&(param->hdl[0]), &flt_rule_entry,
sizeof(struct ipa_flt_rule_del));
if (ipa_del_flt_rule((struct ipa_ioc_del_flt_rule *)param)) {
IPAWANERR("del A7 UL filter rule(%d) failed\n", i);
kfree(param);
return -EFAULT;
}
}
/* set UL filter-rule add-indication */
a7_ul_flt_set = false;
old_num_q6_rule = 0;
kfree(param);
return retval;
}
static int find_mux_channel_index(uint32_t mux_id)
{
int i;
for (i = 0; i < MAX_NUM_OF_MUX_CHANNEL; i++) {
if (mux_id == mux_channel[i].mux_id)
return i;
}
return MAX_NUM_OF_MUX_CHANNEL;
}
static int wwan_register_to_ipa(int index)
{
struct ipa_tx_intf tx_properties = {0};
struct ipa_ioc_tx_intf_prop tx_ioc_properties[2] = { {0}, {0} };
struct ipa_ioc_tx_intf_prop *tx_ipv4_property;
struct ipa_ioc_tx_intf_prop *tx_ipv6_property;
struct ipa_rx_intf rx_properties = {0};
struct ipa_ioc_rx_intf_prop rx_ioc_properties[2] = { {0}, {0} };
struct ipa_ioc_rx_intf_prop *rx_ipv4_property;
struct ipa_ioc_rx_intf_prop *rx_ipv6_property;
struct ipa_ext_intf ext_properties = {0};
struct ipa_ioc_ext_intf_prop *ext_ioc_properties;
u32 pyld_sz;
int ret = 0, i;
IPAWANDBG("index(%d) device[%s]:\n", index,
mux_channel[index].vchannel_name);
if (!mux_channel[index].mux_hdr_set) {
ret = ipa_add_qmap_hdr(mux_channel[index].mux_id,
&mux_channel[index].hdr_hdl);
if (ret) {
IPAWANERR("ipa_add_mux_hdr failed (%d)\n", index);
return ret;
}
mux_channel[index].mux_hdr_set = true;
}
tx_properties.prop = tx_ioc_properties;
tx_ipv4_property = &tx_properties.prop[0];
tx_ipv4_property->ip = IPA_IP_v4;
tx_ipv4_property->dst_pipe = IPA_CLIENT_APPS_WAN_CONS;
snprintf(tx_ipv4_property->hdr_name, IPA_RESOURCE_NAME_MAX, "%s%d",
A2_MUX_HDR_NAME_V4_PREF,
mux_channel[index].mux_id);
tx_ipv6_property = &tx_properties.prop[1];
tx_ipv6_property->ip = IPA_IP_v6;
tx_ipv6_property->dst_pipe = IPA_CLIENT_APPS_WAN_CONS;
/* no need use A2_MUX_HDR_NAME_V6_PREF, same header */
snprintf(tx_ipv6_property->hdr_name, IPA_RESOURCE_NAME_MAX, "%s%d",
A2_MUX_HDR_NAME_V4_PREF,
mux_channel[index].mux_id);
tx_properties.num_props = 2;
rx_properties.prop = rx_ioc_properties;
rx_ipv4_property = &rx_properties.prop[0];
rx_ipv4_property->ip = IPA_IP_v4;
rx_ipv4_property->attrib.attrib_mask |= IPA_FLT_META_DATA;
rx_ipv4_property->attrib.meta_data =
mux_channel[index].mux_id << WWAN_METADATA_SHFT;
rx_ipv4_property->attrib.meta_data_mask = WWAN_METADATA_MASK;
rx_ipv4_property->src_pipe = IPA_CLIENT_APPS_LAN_WAN_PROD;
rx_ipv6_property = &rx_properties.prop[1];
rx_ipv6_property->ip = IPA_IP_v6;
rx_ipv6_property->attrib.attrib_mask |= IPA_FLT_META_DATA;
rx_ipv6_property->attrib.meta_data =
mux_channel[index].mux_id << WWAN_METADATA_SHFT;
rx_ipv6_property->attrib.meta_data_mask = WWAN_METADATA_MASK;
rx_ipv6_property->src_pipe = IPA_CLIENT_APPS_LAN_WAN_PROD;
rx_properties.num_props = 2;
pyld_sz = num_q6_rule *
sizeof(struct ipa_ioc_ext_intf_prop);
ext_ioc_properties = kmalloc(pyld_sz, GFP_KERNEL);
if (!ext_ioc_properties) {
IPAWANERR("Error allocate memory\n");
return -ENOMEM;
}
ext_properties.prop = ext_ioc_properties;
ext_properties.excp_pipe_valid = true;
ext_properties.excp_pipe = IPA_CLIENT_APPS_WAN_CONS;
ext_properties.num_props = num_q6_rule;
for (i = 0; i < num_q6_rule; i++) {
memcpy(&(ext_properties.prop[i]),
&(ipa_qmi_ctx->q6_ul_filter_rule[i]),
sizeof(struct ipa_ioc_ext_intf_prop));
ext_properties.prop[i].mux_id = mux_channel[index].mux_id;
IPAWANDBG("index %d ip: %d rt-tbl:%d\n", i,
ext_properties.prop[i].ip,
ext_properties.prop[i].rt_tbl_idx);
IPAWANDBG("action: %d mux:%d\n",
ext_properties.prop[i].action,
ext_properties.prop[i].mux_id);
}
ret = ipa_register_intf_ext(mux_channel[index].
vchannel_name, &tx_properties,
&rx_properties, &ext_properties);
if (ret) {
IPAWANERR("[%s]:ipa_register_intf failed %d\n",
mux_channel[index].vchannel_name, ret);
goto fail;
}
mux_channel[index].ul_flt_reg = true;
fail:
kfree(ext_ioc_properties);
return ret;
}
static void ipa_cleanup_deregister_intf(void)
{
int i;
int ret;
for (i = 0; i < rmnet_index; i++) {
if (mux_channel[i].ul_flt_reg) {
ret = ipa_deregister_intf(mux_channel[i].vchannel_name);
if (ret < 0) {
IPAWANERR("de-register device %s(%d) failed\n",
mux_channel[i].vchannel_name,
i);
return;
} else {
IPAWANDBG("de-register device %s(%d) success\n",
mux_channel[i].vchannel_name,
i);
}
}
mux_channel[i].ul_flt_reg = false;
}
}
int wwan_update_mux_channel_prop(void)
{
int ret = 0, i;
/* install UL filter rules */
if (egress_set) {
IPAWANDBG("setup UL filter rules\n");
if (a7_ul_flt_set) {
IPAWANDBG("del previous UL filter rules\n");
/* delete rule hdlers */
ret = wwan_del_ul_flt_rule_to_ipa();
if (ret) {
IPAWANERR("failed to del old UL rules\n");
return -EINVAL;
} else {
IPAWANDBG("success to del old UL rules\n");
}
}
ret = wwan_add_ul_flt_rule_to_ipa();
if (ret)
IPAWANERR("failed to install UL rules\n");
else
a7_ul_flt_set = true;
}
/* update Tx/Rx/Ext property */
IPAWANDBG("update Tx/Rx/Ext property in IPA\n");
if (rmnet_index == 0) {
IPAWANDBG("no Tx/Rx/Ext property registered in IPA\n");
return ret;
}
ipa_cleanup_deregister_intf();
for (i = 0; i < rmnet_index; i++) {
ret = wwan_register_to_ipa(i);
if (ret < 0) {
IPAWANERR("failed to re-regist %s, mux %d, index %d\n",
mux_channel[i].vchannel_name,
mux_channel[i].mux_id,
i);
return -ENODEV;
}
IPAWANERR("dev(%s) has registered to IPA\n",
mux_channel[i].vchannel_name);
mux_channel[i].ul_flt_reg = true;
}
return ret;
}
static int __ipa_wwan_open(struct net_device *dev)
{
struct wwan_private *wwan_ptr = netdev_priv(dev);
IPAWANDBG("[%s] __wwan_open()\n", dev->name);
if (wwan_ptr->device_status != WWAN_DEVICE_ACTIVE)
INIT_COMPLETION(wwan_ptr->resource_granted_completion);
wwan_ptr->device_status = WWAN_DEVICE_ACTIVE;
return 0;
}
/**
* wwan_open() - Opens the wwan network interface. Opens logical
* channel on A2 MUX driver and starts the network stack queue
*
* @dev: network device
*
* Return codes:
* 0: success
* -ENODEV: Error while opening logical channel on A2 MUX driver
*/
static int ipa_wwan_open(struct net_device *dev)
{
int rc = 0;
IPAWANDBG("[%s] wwan_open()\n", dev->name);
rc = __ipa_wwan_open(dev);
if (rc == 0)
netif_start_queue(dev);
return rc;
}
static int __ipa_wwan_close(struct net_device *dev)
{
struct wwan_private *wwan_ptr = netdev_priv(dev);
int rc = 0;
if (wwan_ptr->device_status == WWAN_DEVICE_ACTIVE) {
wwan_ptr->device_status = WWAN_DEVICE_INACTIVE;
/* do not close wwan port once up, this causes
remote side to hang if tried to open again */
INIT_COMPLETION(wwan_ptr->resource_granted_completion);
rc = ipa_deregister_intf(dev->name);
if (rc) {
IPAWANERR("[%s]: ipa_deregister_intf failed %d\n",
dev->name, rc);
return rc;
}
return rc;
} else {
return -EBADF;
}
}
/**
* ipa_wwan_stop() - Stops the wwan network interface. Closes
* logical channel on A2 MUX driver and stops the network stack
* queue
*
* @dev: network device
*
* Return codes:
* 0: success
* -ENODEV: Error while opening logical channel on A2 MUX driver
*/
static int ipa_wwan_stop(struct net_device *dev)
{
IPAWANDBG("[%s] ipa_wwan_stop()\n", dev->name);
__ipa_wwan_close(dev);
netif_stop_queue(dev);
return 0;
}
static int ipa_wwan_change_mtu(struct net_device *dev, int new_mtu)
{
if (0 > new_mtu || WWAN_DATA_LEN < new_mtu)
return -EINVAL;
IPAWANDBG("[%s] MTU change: old=%d new=%d\n",
dev->name, dev->mtu, new_mtu);
dev->mtu = new_mtu;
return 0;
}
/**
* ipa_wwan_xmit() - Transmits an skb.
*
* @skb: skb to be transmitted
* @dev: network device
*
* Return codes:
* 0: success
* NETDEV_TX_BUSY: Error while transmitting the skb. Try again
* later
* -EFAULT: Error while transmitting the skb
*/
static int ipa_wwan_xmit(struct sk_buff *skb, struct net_device *dev)
{
int ret = 0;
struct wwan_private *wwan_ptr = netdev_priv(dev);
if (netif_queue_stopped(dev)) {
IPAWANERR("[%s]fatal: ipa_wwan_xmit stopped\n", dev->name);
return 0;
}
/* IPA_RM checking start */
ret = ipa_rm_inactivity_timer_request_resource(
IPA_RM_RESOURCE_WWAN_0_PROD);
if (ret == -EINPROGRESS) {
netif_stop_queue(dev);
return NETDEV_TX_BUSY;
}
if (ret) {
pr_err("[%s] fatal: ipa rm timer request resource failed %d\n",
dev->name, ret);
return -EFAULT;
}
/* IPA_RM checking end */
if (skb->protocol != htons(ETH_P_MAP)) {
IPAWANDBG
("SW filtering out none QMAP packet received from %s",
current->comm);
ret = NETDEV_TX_OK;
goto out;
}
/* checking High WM hit */
if (atomic_read(&wwan_ptr->outstanding_pkts) >=
wwan_ptr->outstanding_high) {
IPAWANDBG("Outstanding high (%d)- stopping\n",
wwan_ptr->outstanding_high);
netif_stop_queue(dev);
ret = NETDEV_TX_BUSY;
goto out;
}
ret = ipa_tx_dp(IPA_CLIENT_APPS_LAN_WAN_PROD, skb, NULL);
if (ret) {
ret = NETDEV_TX_BUSY;
dev->stats.tx_dropped++;
goto out;
}
atomic_inc(&wwan_ptr->outstanding_pkts);
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
ret = NETDEV_TX_OK;
out:
ipa_rm_inactivity_timer_release_resource(
IPA_RM_RESOURCE_WWAN_0_PROD);
return ret;
}
static void ipa_wwan_tx_timeout(struct net_device *dev)
{
IPAWANERR("[%s] ipa_wwan_tx_timeout(), data stall in UL\n", dev->name);
}
/**
* apps_ipa_tx_complete_notify() - Rx notify
*
* @priv: driver context
* @evt: event type
* @data: data provided with event
*
* Check that the packet is the one we sent and release it
* This function will be called in defered context in IPA wq.
*/
static void apps_ipa_tx_complete_notify(void *priv,
enum ipa_dp_evt_type evt,
unsigned long data)
{
struct sk_buff *skb = (struct sk_buff *)data;
struct net_device *dev = (struct net_device *)priv;
struct wwan_private *wwan_ptr = netdev_priv(dev);
if (evt != IPA_WRITE_DONE) {
IPAWANERR("unsupported event on Tx callback\n");
return;
}
atomic_dec(&wwan_ptr->outstanding_pkts);
__netif_tx_lock_bh(netdev_get_tx_queue(dev, 0));
if (netif_queue_stopped(wwan_ptr->net) &&
atomic_read(&wwan_ptr->outstanding_pkts) <
(wwan_ptr->outstanding_low)) {
IPAWANDBG("Outstanding low (%d) - waking up queue\n",
wwan_ptr->outstanding_low);
netif_wake_queue(wwan_ptr->net);
}
__netif_tx_unlock_bh(netdev_get_tx_queue(dev, 0));
dev_kfree_skb_any(skb);
ipa_rm_inactivity_timer_release_resource(
IPA_RM_RESOURCE_WWAN_0_PROD);
return;
}
/**
* apps_ipa_packet_receive_notify() - Rx notify
*
* @priv: driver context
* @evt: event type
* @data: data provided with event
*
* IPA will pass a packet to the Linux network stack with skb->data
*/
static void apps_ipa_packet_receive_notify(void *priv,
enum ipa_dp_evt_type evt,
unsigned long data)
{
struct sk_buff *skb = (struct sk_buff *)data;
struct net_device *dev = (struct net_device *)priv;
int result;
IPAWANDBG("Tx packet was received");
if (evt != IPA_RECEIVE) {
IPAWANERR("A none IPA_RECEIVE event in wan_ipa_receive\n");
return;
}
skb->dev = ipa_netdevs[0];
skb->protocol = htons(ETH_P_MAP);
result = netif_rx_ni(skb);
if (result) {
pr_err_ratelimited(DEV_NAME " %s:%d fail on netif_rx_ni\n",
__func__, __LINE__);
dev->stats.rx_dropped++;
}
dev->stats.rx_packets++;
dev->stats.rx_bytes += skb->len;
return;
}
/**
* ipa_wwan_ioctl() - I/O control for wwan network driver.
*
* @dev: network device
* @ifr: ignored
* @cmd: cmd to be excecuded. can be one of the following:
* IPA_WWAN_IOCTL_OPEN - Open the network interface
* IPA_WWAN_IOCTL_CLOSE - Close the network interface
*
* Return codes:
* 0: success
* NETDEV_TX_BUSY: Error while transmitting the skb. Try again
* later
* -EFAULT: Error while transmitting the skb
*/
static int ipa_wwan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
int rc = 0;
int mru = 1000, epid = 1, mux_index;
struct rmnet_ioctl_extended_s extend_ioctl_data;
struct rmnet_ioctl_data_s ioctl_data;
IPAWANDBG("rmnet_ipa got ioctl number 0x%08x", cmd);
switch (cmd) {
/* Set Ethernet protocol */
case RMNET_IOCTL_SET_LLP_ETHERNET:
break;
/* Set RAWIP protocol */
case RMNET_IOCTL_SET_LLP_IP:
break;
/* Get link protocol */
case RMNET_IOCTL_GET_LLP:
ioctl_data.u.operation_mode = RMNET_MODE_LLP_IP;
if (copy_to_user(ifr->ifr_ifru.ifru_data, &ioctl_data,
sizeof(struct rmnet_ioctl_data_s)))
rc = -EFAULT;
break;
/* Set QoS header enabled */
case RMNET_IOCTL_SET_QOS_ENABLE:
return -EINVAL;
break;
/* Set QoS header disabled */
case RMNET_IOCTL_SET_QOS_DISABLE:
break;
/* Get QoS header state */
case RMNET_IOCTL_GET_QOS:
ioctl_data.u.operation_mode = RMNET_MODE_NONE;
if (copy_to_user(ifr->ifr_ifru.ifru_data, &ioctl_data,
sizeof(struct rmnet_ioctl_data_s)))
rc = -EFAULT;
break;
/* Get operation mode */
case RMNET_IOCTL_GET_OPMODE:
ioctl_data.u.operation_mode = RMNET_MODE_LLP_IP;
if (copy_to_user(ifr->ifr_ifru.ifru_data, &ioctl_data,
sizeof(struct rmnet_ioctl_data_s)))
rc = -EFAULT;
break;
/* Open transport port */
case RMNET_IOCTL_OPEN:
break;
/* Close transport port */
case RMNET_IOCTL_CLOSE:
break;
/* Flow enable */
case RMNET_IOCTL_FLOW_ENABLE:
break;
/* Flow disable */
case RMNET_IOCTL_FLOW_DISABLE:
break;
/* Set flow handle */
case RMNET_IOCTL_FLOW_SET_HNDL:
break;
/* Extended IOCTLs */
case RMNET_IOCTL_EXTENDED:
IPAWANDBG("get ioctl: RMNET_IOCTL_EXTENDED\n");
if (copy_from_user(&extend_ioctl_data,
(u8 *)ifr->ifr_ifru.ifru_data,
sizeof(struct rmnet_ioctl_extended_s))) {
IPAWANERR("failed to copy extended ioctl data\n");
rc = -EFAULT;
break;
}
switch (extend_ioctl_data.extended_ioctl) {
/* Get features */
case RMNET_IOCTL_GET_SUPPORTED_FEATURES:
IPAWANDBG("get RMNET_IOCTL_GET_SUPPORTED_FEATURES\n");
extend_ioctl_data.u.data =
(RMNET_IOCTL_FEAT_NOTIFY_MUX_CHANNEL |
RMNET_IOCTL_FEAT_SET_EGRESS_DATA_FORMAT |
RMNET_IOCTL_FEAT_SET_INGRESS_DATA_FORMAT);
if (copy_to_user((u8 *)ifr->ifr_ifru.ifru_data,
&extend_ioctl_data,
sizeof(struct rmnet_ioctl_extended_s)))
rc = -EFAULT;
break;
/* Set MRU */
case RMNET_IOCTL_SET_MRU:
mru = extend_ioctl_data.u.data;
IPAWANDBG("get MRU size %d\n",
extend_ioctl_data.u.data);
break;
/* Get MRU */
case RMNET_IOCTL_GET_MRU:
extend_ioctl_data.u.data = mru;
if (copy_to_user((u8 *)ifr->ifr_ifru.ifru_data,
&extend_ioctl_data,
sizeof(struct rmnet_ioctl_extended_s)))
rc = -EFAULT;
break;
/* Get endpoint ID */
case RMNET_IOCTL_GET_EPID:
IPAWANDBG("get ioctl: RMNET_IOCTL_GET_EPID\n");
extend_ioctl_data.u.data = epid;
if (copy_to_user((u8 *)ifr->ifr_ifru.ifru_data,
&extend_ioctl_data,
sizeof(struct rmnet_ioctl_extended_s)))
rc = -EFAULT;
if (copy_from_user(&extend_ioctl_data,
(u8 *)ifr->ifr_ifru.ifru_data,
sizeof(struct rmnet_ioctl_extended_s))) {
IPAWANERR("copy extended ioctl data failed\n");
rc = -EFAULT;
break;
}
IPAWANDBG("RMNET_IOCTL_GET_EPID return %d\n",
extend_ioctl_data.u.data);
break;
/* Endpoint pair */
case RMNET_IOCTL_GET_EP_PAIR:
IPAWANDBG("get ioctl: RMNET_IOCTL_GET_EP_PAIR\n");
extend_ioctl_data.u.ipa_ep_pair.consumer_pipe_num =
ipa_get_ep_mapping(IPA_CLIENT_APPS_LAN_WAN_PROD);
extend_ioctl_data.u.ipa_ep_pair.producer_pipe_num =
ipa_get_ep_mapping(IPA_CLIENT_APPS_WAN_CONS);
if (copy_to_user((u8 *)ifr->ifr_ifru.ifru_data,
&extend_ioctl_data,
sizeof(struct rmnet_ioctl_extended_s)))
rc = -EFAULT;
if (copy_from_user(&extend_ioctl_data,
(u8 *)ifr->ifr_ifru.ifru_data,
sizeof(struct rmnet_ioctl_extended_s))) {
IPAWANERR("copy extended ioctl data failed\n");
rc = -EFAULT;
break;
}
IPAWANDBG("RMNET_IOCTL_GET_EP_PAIR c: %d p: %d\n",
extend_ioctl_data.u.ipa_ep_pair.consumer_pipe_num,
extend_ioctl_data.u.ipa_ep_pair.producer_pipe_num);
break;
/* Get driver name */
case RMNET_IOCTL_GET_DRIVER_NAME:
memcpy(&extend_ioctl_data.u.if_name,
ipa_netdevs[0]->name,
sizeof(IFNAMSIZ));
if (copy_to_user((u8 *)ifr->ifr_ifru.ifru_data,
&extend_ioctl_data,
sizeof(struct rmnet_ioctl_extended_s)))
rc = -EFAULT;
break;
/* Add MUX ID */
case RMNET_IOCTL_ADD_MUX_CHANNEL:
mux_index = find_mux_channel_index(
extend_ioctl_data.u.rmnet_mux_val.mux_id);
if (mux_index < MAX_NUM_OF_MUX_CHANNEL) {
IPAWANDBG("already setup mux(%d)\n",
extend_ioctl_data.u.
rmnet_mux_val.mux_id);
return rc;
}
if (rmnet_index >= MAX_NUM_OF_MUX_CHANNEL) {
IPAWANERR("Exceed mux_channel limit(%d)\n",
rmnet_index);
return -EFAULT;
}
IPAWANDBG("ADD_MUX_CHANNEL(%d, name: %s)\n",
extend_ioctl_data.u.rmnet_mux_val.mux_id,
extend_ioctl_data.u.rmnet_mux_val.vchannel_name);
/* cache the mux name and id */
mux_channel[rmnet_index].mux_id =
extend_ioctl_data.u.rmnet_mux_val.mux_id;
memcpy(mux_channel[rmnet_index].vchannel_name,
extend_ioctl_data.u.rmnet_mux_val.vchannel_name,
sizeof(mux_channel[rmnet_index].vchannel_name));
IPAWANDBG("cashe device[%s:%d] in IPA_wan[%d]\n",
mux_channel[rmnet_index].vchannel_name,
mux_channel[rmnet_index].mux_id,
rmnet_index);
/* check if UL filter rules coming*/
if (num_q6_rule != 0) {
IPAWANERR("dev(%s) register to IPA\n",
extend_ioctl_data.u.rmnet_mux_val.
vchannel_name);
rc = wwan_register_to_ipa(rmnet_index);
if (rc < 0) {
IPAWANERR("device %s reg IPA failed\n",
extend_ioctl_data.u.
rmnet_mux_val.vchannel_name);
return -ENODEV;
}
mux_channel[rmnet_index].mux_channel_set = true;
mux_channel[rmnet_index].ul_flt_reg = true;
} else {
IPAWANDBG("dev(%s) haven't registered to IPA\n",
extend_ioctl_data.u.
rmnet_mux_val.vchannel_name);
mux_channel[rmnet_index].mux_channel_set = true;
mux_channel[rmnet_index].ul_flt_reg = false;
}
rmnet_index++;
break;
case RMNET_IOCTL_SET_EGRESS_DATA_FORMAT:
IPAWANDBG("get RMNET_IOCTL_SET_EGRESS_DATA_FORMAT\n");
if ((extend_ioctl_data.u.data) &
RMNET_IOCTL_EGRESS_FORMAT_CHECKSUM) {
apps_to_ipa_ep_cfg.ipa_ep_cfg.hdr.hdr_len = 8;
apps_to_ipa_ep_cfg.ipa_ep_cfg.cfg.
cs_offload_en = 1;
apps_to_ipa_ep_cfg.ipa_ep_cfg.cfg.
cs_metadata_hdr_offset = 1;
} else {
apps_to_ipa_ep_cfg.ipa_ep_cfg.hdr.hdr_len = 4;
}
if ((extend_ioctl_data.u.data) &
RMNET_IOCTL_EGRESS_FORMAT_AGGREGATION)
apps_to_ipa_ep_cfg.ipa_ep_cfg.aggr.aggr_en =
IPA_ENABLE_AGGR;
else
apps_to_ipa_ep_cfg.ipa_ep_cfg.aggr.aggr_en =
IPA_BYPASS_AGGR;
apps_to_ipa_ep_cfg.ipa_ep_cfg.hdr.
hdr_ofst_metadata_valid = 1;
/* modem want offset at 0! */
apps_to_ipa_ep_cfg.ipa_ep_cfg.hdr.hdr_ofst_metadata = 0;
apps_to_ipa_ep_cfg.ipa_ep_cfg.mode.dst =
IPA_CLIENT_APPS_LAN_WAN_PROD;
apps_to_ipa_ep_cfg.ipa_ep_cfg.mode.mode = IPA_BASIC;
apps_to_ipa_ep_cfg.client =
IPA_CLIENT_APPS_LAN_WAN_PROD;
apps_to_ipa_ep_cfg.notify =
apps_ipa_tx_complete_notify;
apps_to_ipa_ep_cfg.desc_fifo_sz =
IPA_SYS_TX_DATA_DESC_FIFO_SZ;
apps_to_ipa_ep_cfg.priv = dev;
rc = ipa_setup_sys_pipe(&apps_to_ipa_ep_cfg,
&apps_to_ipa_hdl);
if (rc)
IPAWANERR("failed to config egress endpoint\n");
if (num_q6_rule != 0) {
/* already got Q6 UL filter rules*/
rc = wwan_add_ul_flt_rule_to_ipa();
egress_set = true;
if (rc)
IPAWANERR("install UL rules failed\n");
else
a7_ul_flt_set = true;
} else {
/* wait Q6 UL filter rules*/
egress_set = true;
IPAWANDBG("no UL-rules, egress_set(%d)\n",
egress_set);
}
break;
case RMNET_IOCTL_SET_INGRESS_DATA_FORMAT:/* Set IDF */
IPAWANDBG("get RMNET_IOCTL_SET_INGRESS_DATA_FORMAT\n");
if ((extend_ioctl_data.u.data) &
RMNET_IOCTL_INGRESS_FORMAT_CHECKSUM)
ipa_to_apps_ep_cfg.ipa_ep_cfg.cfg.
cs_offload_en = 2;
ipa_to_apps_ep_cfg.ipa_ep_cfg.hdr.hdr_len = 4;
ipa_to_apps_ep_cfg.ipa_ep_cfg.hdr.
hdr_ofst_metadata_valid = 1;
ipa_to_apps_ep_cfg.ipa_ep_cfg.
hdr.hdr_ofst_metadata = 1;
ipa_to_apps_ep_cfg.ipa_ep_cfg.hdr.
hdr_ofst_pkt_size_valid = 1;
ipa_to_apps_ep_cfg.ipa_ep_cfg.hdr.
hdr_ofst_pkt_size = 2;
ipa_to_apps_ep_cfg.ipa_ep_cfg.hdr_ext.
hdr_total_len_or_pad_valid = true;
ipa_to_apps_ep_cfg.ipa_ep_cfg.hdr_ext.
hdr_total_len_or_pad = 0;
ipa_to_apps_ep_cfg.ipa_ep_cfg.hdr_ext.
hdr_payload_len_inc_padding = true;
ipa_to_apps_ep_cfg.ipa_ep_cfg.hdr_ext.
hdr_total_len_or_pad_offset = 0;
ipa_to_apps_ep_cfg.ipa_ep_cfg.hdr_ext.
hdr_little_endian = 0;
ipa_to_apps_ep_cfg.ipa_ep_cfg.metadata_mask.
metadata_mask = 0xFF000000;
ipa_to_apps_ep_cfg.client = IPA_CLIENT_APPS_WAN_CONS;
ipa_to_apps_ep_cfg.notify =
apps_ipa_packet_receive_notify;
ipa_to_apps_ep_cfg.desc_fifo_sz = IPA_SYS_DESC_FIFO_SZ;
ipa_to_apps_ep_cfg.priv = dev;
rc = ipa_setup_sys_pipe(
&ipa_to_apps_ep_cfg, &ipa_to_apps_hdl);
if (rc)
IPAWANERR("failed to configure ingress\n");
break;
/* Get agg count */
case RMNET_IOCTL_GET_AGGREGATION_COUNT:
break;
/* Set agg count */
case RMNET_IOCTL_SET_AGGREGATION_COUNT:
break;
/* Get agg size */
case RMNET_IOCTL_GET_AGGREGATION_SIZE:
break;
/* Set agg size */
case RMNET_IOCTL_SET_AGGREGATION_SIZE:
break;
/* Do flow control */
case RMNET_IOCTL_FLOW_CONTROL:
break;
/* For legacy use */
case RMNET_IOCTL_GET_DFLT_CONTROL_CHANNEL:
break;
/* Get HW/SW map */
case RMNET_IOCTL_GET_HWSW_MAP:
break;
/* Set RX Headroom */
case RMNET_IOCTL_SET_RX_HEADROOM:
break;
default:
IPAWANERR("[%s] unsupported extended cmd[%d]",
dev->name,
extend_ioctl_data.extended_ioctl);
rc = -EINVAL;
}
break;
default:
IPAWANERR("[%s] unsupported cmd[%d]",
dev->name, cmd);
rc = -EINVAL;
}
return rc;
}
static const struct net_device_ops ipa_wwan_ops_ip = {
.ndo_open = ipa_wwan_open,
.ndo_stop = ipa_wwan_stop,
.ndo_start_xmit = ipa_wwan_xmit,
.ndo_tx_timeout = ipa_wwan_tx_timeout,
.ndo_do_ioctl = ipa_wwan_ioctl,
.ndo_change_mtu = ipa_wwan_change_mtu,
.ndo_set_mac_address = 0,
.ndo_validate_addr = 0,
};
/**
* wwan_setup() - Setups the wwan network driver.
*
* @dev: network device
*
* Return codes:
* None
*/
static void ipa_wwan_setup(struct net_device *dev)
{
dev->netdev_ops = &ipa_wwan_ops_ip;
ether_setup(dev);
/* set this after calling ether_setup */
dev->header_ops = 0; /* No header */
dev->type = ARPHRD_RAWIP;
dev->hard_header_len = 0;
dev->mtu = WWAN_DATA_LEN;
dev->addr_len = 0;
dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST);
dev->needed_headroom = HEADROOM_FOR_QMAP;
dev->needed_tailroom = TAILROOM;
dev->watchdog_timeo = 1000;
}
/* IPA_RM related functions start*/
static void q6_prod_rm_request_resource(struct work_struct *work);
static DECLARE_DELAYED_WORK(q6_con_rm_request, q6_prod_rm_request_resource);
static void q6_prod_rm_release_resource(struct work_struct *work);
static DECLARE_DELAYED_WORK(q6_con_rm_release, q6_prod_rm_release_resource);
static void q6_prod_rm_request_resource(struct work_struct *work)
{
int ret = 0;
ret = ipa_rm_request_resource(IPA_RM_RESOURCE_Q6_PROD);
if (ret < 0 && ret != -EINPROGRESS) {
IPAWANERR("%s: ipa_rm_request_resource failed %d\n", __func__,
ret);
return;
}
}
static int q6_rm_request_resource(void)
{
queue_delayed_work(ipa_rm_q6_workqueue,
&q6_con_rm_request, 0);
return 0;
}
static void q6_prod_rm_release_resource(struct work_struct *work)
{
int ret = 0;
ret = ipa_rm_release_resource(IPA_RM_RESOURCE_Q6_PROD);
if (ret < 0 && ret != -EINPROGRESS) {
IPAWANERR("%s: ipa_rm_release_resource failed %d\n", __func__,
ret);
return;
}
}
static int q6_rm_release_resource(void)
{
queue_delayed_work(ipa_rm_q6_workqueue,
&q6_con_rm_release, 0);
return 0;
}
static void q6_rm_notify_cb(void *user_data,
enum ipa_rm_event event,
unsigned long data)
{
switch (event) {
case IPA_RM_RESOURCE_GRANTED:
IPAWANDBG("%s: Q6_PROD GRANTED CB\n", __func__);
break;
case IPA_RM_RESOURCE_RELEASED:
IPAWANDBG("%s: Q6_PROD RELEASED CB\n", __func__);
break;
default:
return;
}
}
static int q6_initialize_rm(void)
{
struct ipa_rm_create_params create_params;
struct ipa_rm_perf_profile profile;
int result;
/* Initialize IPA_RM workqueue */
ipa_rm_q6_workqueue = create_singlethread_workqueue("clnt_req");
if (!ipa_rm_q6_workqueue)
return -ENOMEM;
memset(&create_params, 0, sizeof(create_params));
create_params.name = IPA_RM_RESOURCE_Q6_PROD;
create_params.reg_params.notify_cb = &q6_rm_notify_cb;
result = ipa_rm_create_resource(&create_params);
if (result)
goto create_rsrc_err1;
memset(&create_params, 0, sizeof(create_params));
create_params.name = IPA_RM_RESOURCE_Q6_CONS;
create_params.release_resource = &q6_rm_release_resource;
create_params.request_resource = &q6_rm_request_resource;
result = ipa_rm_create_resource(&create_params);
if (result)
goto create_rsrc_err2;
/* add dependency*/
result = ipa_rm_add_dependency(IPA_RM_RESOURCE_Q6_PROD,
IPA_RM_RESOURCE_APPS_CONS);
if (result)
goto add_dpnd_err;
/* setup Performance profile */
memset(&profile, 0, sizeof(profile));
profile.max_supported_bandwidth_mbps = 100;
result = ipa_rm_set_perf_profile(IPA_RM_RESOURCE_Q6_PROD,
&profile);
if (result)
goto set_perf_err;
result = ipa_rm_set_perf_profile(IPA_RM_RESOURCE_Q6_CONS,
&profile);
if (result)
goto set_perf_err;
return result;
set_perf_err:
ipa_rm_delete_dependency(IPA_RM_RESOURCE_Q6_PROD,
IPA_RM_RESOURCE_APPS_CONS);
add_dpnd_err:
result = ipa_rm_delete_resource(IPA_RM_RESOURCE_Q6_CONS);
if (result < 0)
IPAWANERR("Error deleting resource %d, ret=%d\n",
IPA_RM_RESOURCE_Q6_CONS, result);
create_rsrc_err2:
result = ipa_rm_delete_resource(IPA_RM_RESOURCE_Q6_PROD);
if (result < 0)
IPAWANERR("Error deleting resource %d, ret=%d\n",
IPA_RM_RESOURCE_Q6_PROD, result);
create_rsrc_err1:
destroy_workqueue(ipa_rm_q6_workqueue);
return result;
}
void q6_deinitialize_rm(void)
{
int ret;
ret = ipa_rm_delete_dependency(IPA_RM_RESOURCE_Q6_PROD,
IPA_RM_RESOURCE_APPS_CONS);
if (ret < 0)
IPAWANERR("Error deleting dependency %d->%d, ret=%d\n",
IPA_RM_RESOURCE_Q6_PROD, IPA_RM_RESOURCE_APPS_CONS,
ret);
ret = ipa_rm_delete_resource(IPA_RM_RESOURCE_Q6_CONS);
if (ret < 0)
IPAWANERR("Error deleting resource %d, ret=%d\n",
IPA_RM_RESOURCE_Q6_CONS, ret);
ret = ipa_rm_delete_resource(IPA_RM_RESOURCE_Q6_PROD);
if (ret < 0)
IPAWANERR("Error deleting resource %d, ret=%d\n",
IPA_RM_RESOURCE_Q6_PROD, ret);
destroy_workqueue(ipa_rm_q6_workqueue);
}
static void wake_tx_queue(struct work_struct *work)
{
if (ipa_netdevs[0]) {
__netif_tx_lock_bh(netdev_get_tx_queue(ipa_netdevs[0], 0));
netif_wake_queue(ipa_netdevs[0]);
__netif_tx_unlock_bh(netdev_get_tx_queue(ipa_netdevs[0], 0));
}
}
/**
* ipa_rm_resource_granted() - Called upon
* IPA_RM_RESOURCE_GRANTED event. Wakes up queue is was stopped.
*
* @work: work object supplied ny workqueue
*
* Return codes:
* None
*/
static void ipa_rm_resource_granted(void *dev)
{
IPAWANDBG("Resource Granted - starting queue\n");
schedule_work(&ipa_tx_wakequeue_work);
}
/**
* ipa_rm_notify() - Callback function for RM events. Handles
* IPA_RM_RESOURCE_GRANTED and IPA_RM_RESOURCE_RELEASED events.
* IPA_RM_RESOURCE_GRANTED is handled in the context of shared
* workqueue.
*
* @dev: network device
* @event: IPA RM event
* @data: Additional data provided by IPA RM
*
* Return codes:
* None
*/
static void ipa_rm_notify(void *dev, enum ipa_rm_event event,
unsigned long data)
{
struct wwan_private *wwan_ptr = netdev_priv(dev);
pr_debug("%s: event %d\n", __func__, event);
switch (event) {
case IPA_RM_RESOURCE_GRANTED:
if (wwan_ptr->device_status == WWAN_DEVICE_INACTIVE) {
complete_all(&wwan_ptr->resource_granted_completion);
break;
}
ipa_rm_resource_granted(dev);
break;
case IPA_RM_RESOURCE_RELEASED:
break;
default:
pr_err("%s: unknown event %d\n", __func__, event);
break;
}
}
/* IPA_RM related functions end*/
static int ssr_notifier_cb(struct notifier_block *this,
unsigned long code,
void *data);
static struct notifier_block ssr_notifier = {
.notifier_call = ssr_notifier_cb,
};
static struct ipa_rmnet_plat_drv_res ipa_rmnet_res = {0, };
static int get_ipa_rmnet_dts_configuration(struct platform_device *pdev,
struct ipa_rmnet_plat_drv_res *ipa_rmnet_drv_res)
{
ipa_rmnet_drv_res->ipa_rmnet_ssr =
of_property_read_bool(pdev->dev.of_node,
"qcom,rmnet-ipa-ssr");
pr_info("IPA SSR support = %s\n",
ipa_rmnet_drv_res->ipa_rmnet_ssr ? "True" : "False");
ipa_rmnet_drv_res->ipa_loaduC =
of_property_read_bool(pdev->dev.of_node,
"qcom,ipa-loaduC");
pr_info("IPA ipa-loaduC = %s\n",
ipa_rmnet_drv_res->ipa_loaduC ? "True" : "False");
return 0;
}
struct ipa_rmnet_context ipa_rmnet_ctx;
/**
* ipa_wwan_probe() - Initialized the module and registers as a
* network interface to the network stack
*
* Return codes:
* 0: success
* -ENOMEM: No memory available
* -EFAULT: Internal error
* -ENODEV: IPA driver not loaded
*/
static int ipa_wwan_probe(struct platform_device *pdev)
{
int ret, i;
struct net_device *dev;
struct wwan_private *wwan_ptr;
struct ipa_rm_create_params ipa_rm_params; /* IPA_RM */
struct ipa_rm_perf_profile profile; /* IPA_RM */
pr_info("rmnet_ipa started initialization\n");
if (!ipa_is_ready()) {
IPAWANERR("IPA driver not loaded\n");
return -ENODEV;
}
ret = get_ipa_rmnet_dts_configuration(pdev, &ipa_rmnet_res);
ipa_rmnet_ctx.ipa_rmnet_ssr = ipa_rmnet_res.ipa_rmnet_ssr;
if (ipa_ctx->ipa_hw_type == IPA_HW_v2_0) {
ret = ipa_init_q6_smem();
if (ret) {
IPAWANERR("ipa_init_q6_smem failed!\n");
return ret;
}
}
/* initialize tx/rx enpoint setup */
memset(&apps_to_ipa_ep_cfg, 0, sizeof(struct ipa_sys_connect_params));
memset(&ipa_to_apps_ep_cfg, 0, sizeof(struct ipa_sys_connect_params));
/* initialize ex property setup */
num_q6_rule = 0;
old_num_q6_rule = 0;
rmnet_index = 0;
egress_set = false;
a7_ul_flt_set = false;
for (i = 0; i < MAX_NUM_OF_MUX_CHANNEL; i++)
memset(&mux_channel[i], 0, sizeof(struct rmnet_mux_val));
/* start A7 QMI service/client */
if (ipa_rmnet_res.ipa_loaduC) {
/* Android platform loads uC */
ipa_qmi_service_init(atomic_read(&is_ssr) ? false : true,
QMI_IPA_PLATFORM_TYPE_MSM_ANDROID_V01);
} else {
/* LE platform not loads uC */
ipa_qmi_service_init(atomic_read(&is_ssr) ? false : true,
QMI_IPA_PLATFORM_TYPE_LE_V01);
}
/* construct default WAN RT tbl for IPACM */
ret = ipa_setup_a7_qmap_hdr();
if (ret)
goto setup_a7_qmap_hdr_err;
ret = ipa_setup_dflt_wan_rt_tables();
if (ret)
goto setup_dflt_wan_rt_tables_err;
if (!atomic_read(&is_ssr)) {
/* Start transport-driver fd ioctl for ipacm for first init */
ret = wan_ioctl_init();
if (ret)
goto wan_ioctl_init_err;
} else {
/* Enable sending QMI messages after SSR */
wan_ioctl_enable_qmi_messages();
}
/* initialize wan-driver netdev */
dev = alloc_netdev(sizeof(struct wwan_private),
IPA_WWAN_DEV_NAME, ipa_wwan_setup);
if (!dev) {
IPAWANERR("no memory for netdev\n");
ret = -ENOMEM;
goto alloc_netdev_err;
}
ipa_netdevs[0] = dev;
wwan_ptr = netdev_priv(dev);
memset(wwan_ptr, 0, sizeof(*wwan_ptr));
IPAWANDBG("wwan_ptr (private) = %p", wwan_ptr);
wwan_ptr->net = dev;
wwan_ptr->outstanding_high = DEFAULT_OUTSTANDING_HIGH;
wwan_ptr->outstanding_low = DEFAULT_OUTSTANDING_LOW;
atomic_set(&wwan_ptr->outstanding_pkts, 0);
spin_lock_init(&wwan_ptr->lock);
init_completion(&wwan_ptr->resource_granted_completion);
if (!atomic_read(&is_ssr)) {
/* IPA_RM configuration starts */
ret = q6_initialize_rm();
if (ret) {
IPAWANERR("%s: q6_initialize_rm failed, ret: %d\n",
__func__, ret);
goto q6_init_err;
}
}
memset(&ipa_rm_params, 0, sizeof(struct ipa_rm_create_params));
ipa_rm_params.name = IPA_RM_RESOURCE_WWAN_0_PROD;
ipa_rm_params.reg_params.user_data = dev;
ipa_rm_params.reg_params.notify_cb = ipa_rm_notify;
ret = ipa_rm_create_resource(&ipa_rm_params);
if (ret) {
pr_err("%s: unable to create resourse %d in IPA RM\n",
__func__, IPA_RM_RESOURCE_WWAN_0_PROD);
goto create_rsrc_err;
}
ret = ipa_rm_inactivity_timer_init(IPA_RM_RESOURCE_WWAN_0_PROD,
IPA_RM_INACTIVITY_TIMER);
if (ret) {
pr_err("%s: ipa rm timer init failed %d on resourse %d\n",
__func__, ret, IPA_RM_RESOURCE_WWAN_0_PROD);
goto timer_init_err;
}
/* add dependency */
ret = ipa_rm_add_dependency(IPA_RM_RESOURCE_WWAN_0_PROD,
IPA_RM_RESOURCE_Q6_CONS);
if (ret)
goto add_dpnd_err;
/* setup Performance profile */
memset(&profile, 0, sizeof(profile));
profile.max_supported_bandwidth_mbps = IPA_APPS_MAX_BW_IN_MBPS;
ret = ipa_rm_set_perf_profile(IPA_RM_RESOURCE_WWAN_0_PROD,
&profile);
if (ret)
goto set_perf_err;
/* IPA_RM configuration ends */
ret = register_netdev(dev);
if (ret) {
IPAWANERR("unable to register ipa_netdev %d rc=%d\n",
0, ret);
goto set_perf_err;
}
IPAWANDBG("IPA-WWAN devices (%s) initilization ok :>>>>\n",
ipa_netdevs[0]->name);
if (ret) {
IPAWANERR("default configuration failed rc=%d\n",
ret);
goto config_err;
}
atomic_set(&is_initialized, 1);
if (!atomic_read(&is_ssr)) {
/* offline charging mode */
ipa_proxy_clk_unvote();
}
atomic_set(&is_ssr, 0);
pr_info("rmnet_ipa completed initialization\n");
return 0;
config_err:
unregister_netdev(ipa_netdevs[0]);
set_perf_err:
ret = ipa_rm_delete_dependency(IPA_RM_RESOURCE_WWAN_0_PROD,
IPA_RM_RESOURCE_Q6_CONS);
if (ret)
IPAWANERR("Error deleting dependency %d->%d, ret=%d\n",
IPA_RM_RESOURCE_WWAN_0_PROD, IPA_RM_RESOURCE_Q6_CONS,
ret);
add_dpnd_err:
ret = ipa_rm_inactivity_timer_destroy(
IPA_RM_RESOURCE_WWAN_0_PROD); /* IPA_RM */
if (ret)
IPAWANERR("Error ipa_rm_inactivity_timer_destroy %d, ret=%d\n",
IPA_RM_RESOURCE_WWAN_0_PROD, ret);
timer_init_err:
ret = ipa_rm_delete_resource(IPA_RM_RESOURCE_WWAN_0_PROD);
if (ret)
IPAWANERR("Error deleting resource %d, ret=%d\n",
IPA_RM_RESOURCE_WWAN_0_PROD, ret);
create_rsrc_err:
q6_deinitialize_rm();
q6_init_err:
free_netdev(ipa_netdevs[0]);
ipa_netdevs[0] = NULL;
alloc_netdev_err:
wan_ioctl_deinit();
wan_ioctl_init_err:
ipa_del_dflt_wan_rt_tables();
setup_dflt_wan_rt_tables_err:
ipa_del_a7_qmap_hdr();
setup_a7_qmap_hdr_err:
ipa_qmi_service_exit();
ret = subsys_notif_unregister_notifier(SUBSYS_MODEM, &ssr_notifier);
if (ret)
IPAWANERR(
"Error subsys_notif_unregister_notifier system %s, ret=%d\n",
SUBSYS_MODEM, ret);
atomic_set(&is_ssr, 0);
return ret;
}
static int ipa_wwan_remove(struct platform_device *pdev)
{
int ret;
pr_info("rmnet_ipa started deinitialization\n");
ret = ipa_teardown_sys_pipe(ipa_to_apps_hdl);
if (ret < 0)
IPAWANERR("Failed to teardown IPA->APPS pipe\n");
else
ipa_to_apps_hdl = 0;
unregister_netdev(ipa_netdevs[0]);
ret = ipa_rm_delete_dependency(IPA_RM_RESOURCE_WWAN_0_PROD,
IPA_RM_RESOURCE_Q6_CONS);
if (ret < 0)
IPAWANERR("Error deleting dependency %d->%d, ret=%d\n",
IPA_RM_RESOURCE_WWAN_0_PROD, IPA_RM_RESOURCE_Q6_CONS,
ret);
ret = ipa_rm_inactivity_timer_destroy(IPA_RM_RESOURCE_WWAN_0_PROD);
if (ret < 0)
IPAWANERR(
"Error ipa_rm_inactivity_timer_destroy resource %d, ret=%d\n",
IPA_RM_RESOURCE_WWAN_0_PROD, ret);
ret = ipa_rm_delete_resource(IPA_RM_RESOURCE_WWAN_0_PROD);
if (ret < 0)
IPAWANERR("Error deleting resource %d, ret=%d\n",
IPA_RM_RESOURCE_WWAN_0_PROD, ret);
cancel_work_sync(&ipa_tx_wakequeue_work);
free_netdev(ipa_netdevs[0]);
ipa_netdevs[0] = NULL;
/* No need to remove wwan_ioctl during SSR */
if (!atomic_read(&is_ssr))
wan_ioctl_deinit();
ipa_del_dflt_wan_rt_tables();
ipa_del_a7_qmap_hdr();
ipa_del_mux_qmap_hdrs();
wwan_del_ul_flt_rule_to_ipa();
/* clean up cached QMI msg/handlers */
ipa_qmi_service_exit();
ipa_cleanup_deregister_intf();
atomic_set(&is_initialized, 0);
pr_info("rmnet_ipa completed deinitialization\n");
return 0;
}
/**
* rmnet_ipa_ap_suspend() - suspend callback for runtime_pm
* @dev: pointer to device
*
* This callback will be invoked by the runtime_pm framework when an AP suspend
* operation is invoked, usually by pressing a suspend button.
*
* Returns -EAGAIN to runtime_pm framework in case there are pending packets
* in the Tx queue. This will postpone the suspend operation until all the
* pending packets will be transmitted.
*
* In case there are no packets to send, releases the WWAN0_PROD entity.
* As an outcome, the number of IPA active clients should be decremented
* until IPA clocks can be gated.
*/
static int rmnet_ipa_ap_suspend(struct device *dev)
{
struct net_device *netdev = ipa_netdevs[0];
struct wwan_private *wwan_ptr = netdev_priv(netdev);
IPAWANDBG("Enter...\n");
/* Do not allow A7 to suspend in case there are oustanding packets */
if (atomic_read(&wwan_ptr->outstanding_pkts) != 0) {
IPAWANDBG("Outstanding packets, postponing AP suspend.\n");
return -EAGAIN;
}
/* Make sure that there is no Tx operation ongoing */
netif_tx_lock_bh(netdev);
ipa_rm_release_resource(IPA_RM_RESOURCE_WWAN_0_PROD);
netif_tx_unlock_bh(netdev);
IPAWANDBG("Exit\n");
return 0;
}
/**
* rmnet_ipa_ap_resume() - resume callback for runtime_pm
* @dev: pointer to device
*
* This callback will be invoked by the runtime_pm framework when an AP resume
* operation is invoked.
*
* Enables the network interface queue and returns success to the
* runtime_pm framwork.
*/
static int rmnet_ipa_ap_resume(struct device *dev)
{
struct net_device *netdev = ipa_netdevs[0];
IPAWANDBG("Enter...\n");
netif_wake_queue(netdev);
IPAWANDBG("Exit\n");
return 0;
}
static const struct of_device_id rmnet_ipa_dt_match[] = {
{.compatible = "qcom,rmnet-ipa"},
{},
};
MODULE_DEVICE_TABLE(of, rmnet_ipa_dt_match);
static const struct dev_pm_ops rmnet_ipa_pm_ops = {
.suspend_noirq = rmnet_ipa_ap_suspend,
.resume_noirq = rmnet_ipa_ap_resume,
};
static struct platform_driver rmnet_ipa_driver = {
.driver = {
.name = "rmnet_ipa",
.owner = THIS_MODULE,
.pm = &rmnet_ipa_pm_ops,
.of_match_table = rmnet_ipa_dt_match,
},
.probe = ipa_wwan_probe,
.remove = ipa_wwan_remove,
};
static int ssr_notifier_cb(struct notifier_block *this,
unsigned long code,
void *data)
{
if (ipa_rmnet_ctx.ipa_rmnet_ssr) {
if (SUBSYS_BEFORE_SHUTDOWN == code) {
pr_info("IPA received MPSS BEFORE_SHUTDOWN\n");
ipa_q6_cleanup();
ipa_qmi_stop_workqueues();
wan_ioctl_stop_qmi_messages();
atomic_set(&is_ssr, 1);
if (atomic_read(&is_initialized))
platform_driver_unregister(&rmnet_ipa_driver);
pr_info("IPA BEFORE_SHUTDOWN handling is complete\n");
return NOTIFY_DONE;
}
if (SUBSYS_AFTER_POWERUP == code) {
pr_info("IPA received MPSS AFTER_POWERUP\n");
if (!atomic_read(&is_initialized)
&& atomic_read(&is_ssr))
platform_driver_register(&rmnet_ipa_driver);
pr_info("IPA AFTER_POWERUP handling is complete\n");
return NOTIFY_DONE;
}
if (SUBSYS_BEFORE_POWERUP == code) {
pr_info("IPA received MPSS BEFORE_POWERUP\n");
ipa_proxy_clk_vote();
pr_info("IPA BEFORE_POWERUP handling is complete\n");
return NOTIFY_DONE;
}
}
return NOTIFY_DONE;
}
static int __init ipa_wwan_init(void)
{
void *subsys;
atomic_set(&is_initialized, 0);
atomic_set(&is_ssr, 0);
/* Register for Modem SSR */
subsys = subsys_notif_register_notifier(SUBSYS_MODEM, &ssr_notifier);
if (!IS_ERR(subsys))
return platform_driver_register(&rmnet_ipa_driver);
else
return (int)PTR_ERR(subsys);
}
static void __exit ipa_wwan_cleanup(void)
{
platform_driver_unregister(&rmnet_ipa_driver);
}
late_initcall(ipa_wwan_init);
module_exit(ipa_wwan_cleanup);
MODULE_DESCRIPTION("WWAN Network Interface");
MODULE_LICENSE("GPL v2");