diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/rmnet/shs/Android.mk | 2 | ||||
-rw-r--r-- | drivers/rmnet/shs/Kbuild | 2 | ||||
-rw-r--r-- | drivers/rmnet/shs/rmnet_shs.h | 19 | ||||
-rw-r--r-- | drivers/rmnet/shs/rmnet_shs_config.c | 2 | ||||
-rw-r--r-- | drivers/rmnet/shs/rmnet_shs_config.h | 6 | ||||
-rw-r--r-- | drivers/rmnet/shs/rmnet_shs_freq.c | 4 | ||||
-rwxr-xr-x | drivers/rmnet/shs/rmnet_shs_main.c | 123 | ||||
-rw-r--r-- | drivers/rmnet/shs/rmnet_shs_wq.c | 630 | ||||
-rw-r--r-- | drivers/rmnet/shs/rmnet_shs_wq.h | 65 | ||||
-rw-r--r-- | drivers/rmnet/shs/rmnet_shs_wq_genl.c | 358 | ||||
-rw-r--r-- | drivers/rmnet/shs/rmnet_shs_wq_genl.h | 76 | ||||
-rw-r--r-- | drivers/rmnet/shs/rmnet_shs_wq_mem.c | 609 | ||||
-rw-r--r-- | drivers/rmnet/shs/rmnet_shs_wq_mem.h | 89 |
13 files changed, 1921 insertions, 64 deletions
diff --git a/drivers/rmnet/shs/Android.mk b/drivers/rmnet/shs/Android.mk index 08215a0..b150417 100644 --- a/drivers/rmnet/shs/Android.mk +++ b/drivers/rmnet/shs/Android.mk @@ -14,7 +14,7 @@ LOCAL_CLANG :=true LOCAL_MODULE_PATH := $(KERNEL_MODULES_OUT) LOCAL_MODULE := rmnet_shs.ko -LOCAL_SRC_FILES := rmnet_shs_main.c rmnet_shs_config.c rmnet_shs_wq.c rmnet_shs_freq.c +LOCAL_SRC_FILES := rmnet_shs_main.c rmnet_shs_config.c rmnet_shs_wq.c rmnet_shs_freq.c rmnet_shs_wq_mem.c rmnet_shs_wq_genl.c RMNET_SHS_BLD_DIR := ../../vendor/qcom/opensource/data-kernel/drivers/rmnet/shs DLKM_DIR := ./device/qcom/common/dlkm diff --git a/drivers/rmnet/shs/Kbuild b/drivers/rmnet/shs/Kbuild index 1593101..196d128 100644 --- a/drivers/rmnet/shs/Kbuild +++ b/drivers/rmnet/shs/Kbuild @@ -1,2 +1,2 @@ obj-m += rmnet_shs.o -rmnet_shs-y := rmnet_shs_config.o rmnet_shs_main.o rmnet_shs_wq.o rmnet_shs_freq.o +rmnet_shs-y := rmnet_shs_config.o rmnet_shs_main.o rmnet_shs_wq.o rmnet_shs_freq.o rmnet_shs_wq_mem.o rmnet_shs_wq_genl.o diff --git a/drivers/rmnet/shs/rmnet_shs.h b/drivers/rmnet/shs/rmnet_shs.h index 9f12e5d..f6ce09e 100644 --- a/drivers/rmnet/shs/rmnet_shs.h +++ b/drivers/rmnet/shs/rmnet_shs.h @@ -54,14 +54,14 @@ //#define RMNET_SHS_UDP_PPS_SILVER_CORE_UPPER_THRESH 90000 //#define RMNET_SHS_TCP_PPS_SILVER_CORE_UPPER_THRESH 90000 -#define SHS_TRACE_ERR(...) if (rmnet_shs_debug) \ - trace_rmnet_shs_err(__VA_ARGS__) +#define SHS_TRACE_ERR(...) \ + do { if (rmnet_shs_debug) trace_rmnet_shs_err(__VA_ARGS__); } while (0) -#define SHS_TRACE_HIGH(...) if (rmnet_shs_debug) \ - trace_rmnet_shs_high(__VA_ARGS__) +#define SHS_TRACE_HIGH(...) \ + do { if (rmnet_shs_debug) trace_rmnet_shs_high(__VA_ARGS__); } while (0) -#define SHS_TRACE_LOW(...) if (rmnet_shs_debug) \ - trace_rmnet_shs_low(__VA_ARGS__) +#define SHS_TRACE_LOW(...) \ + do { if (rmnet_shs_debug) trace_rmnet_shs_low(__VA_ARGS__); } while (0) #define RMNET_SHS_MAX_SILVER_CORE_BURST_CAPACITY 204800 @@ -77,6 +77,9 @@ #define RMNET_SHS_UDP_PPS_PERF_CPU_LTHRESH 40000 #define RMNET_SHS_TCP_PPS_PERF_CPU_LTHRESH (40000*RMNET_SHS_TCP_COALESCING_RATIO) +#define RMNET_SHS_UDP_PPS_HEADROOM 20000 +#define RMNET_SHS_GOLD_BALANCING_THRESH (RMNET_SHS_UDP_PPS_PERF_CPU_UTHRESH / 2) + struct core_flush_s { struct hrtimer core_timer; struct work_struct work; @@ -92,8 +95,8 @@ struct rmnet_shs_cfg_s { struct rmnet_port *port; struct core_flush_s core_flush[MAX_CPUS]; u64 core_skbs[MAX_CPUS]; - long int num_bytes_parked; - long int num_pkts_parked; + long num_bytes_parked; + long num_pkts_parked; u32 is_reg_dl_mrk_ind; u16 num_flows; u8 is_pkt_parked; diff --git a/drivers/rmnet/shs/rmnet_shs_config.c b/drivers/rmnet/shs/rmnet_shs_config.c index 4112e1a..a268c98 100644 --- a/drivers/rmnet/shs/rmnet_shs_config.c +++ b/drivers/rmnet/shs/rmnet_shs_config.c @@ -32,7 +32,7 @@ unsigned int rmnet_shs_stats_enabled __read_mostly = 1; module_param(rmnet_shs_stats_enabled, uint, 0644); MODULE_PARM_DESC(rmnet_shs_stats_enabled, "Enable Disable stats collection"); -unsigned long int rmnet_shs_crit_err[RMNET_SHS_CRIT_ERR_MAX]; +unsigned long rmnet_shs_crit_err[RMNET_SHS_CRIT_ERR_MAX]; module_param_array(rmnet_shs_crit_err, ulong, 0, 0444); MODULE_PARM_DESC(rmnet_shs_crit_err, "rmnet shs crtical error type"); diff --git a/drivers/rmnet/shs/rmnet_shs_config.h b/drivers/rmnet/shs/rmnet_shs_config.h index d033723..dc385e4 100644 --- a/drivers/rmnet/shs/rmnet_shs_config.h +++ b/drivers/rmnet/shs/rmnet_shs_config.h @@ -42,12 +42,16 @@ enum rmnet_shs_crit_err_e { RMNET_SHS_CPU_PKTLEN_ERR, RMNET_SHS_NULL_SKB_HEAD, RMNET_SHS_RPS_MASK_CHANGE, + RMNET_SHS_WQ_INVALID_CPU_ERR, + RMNET_SHS_WQ_INVALID_PTR_ERR, + RMNET_SHS_WQ_NODE_MALLOC_ERR, + RMNET_SHS_WQ_NL_SOCKET_ERR, RMNET_SHS_CRIT_ERR_MAX }; extern unsigned int rmnet_shs_debug; extern unsigned int rmnet_shs_stats_enabled; -extern unsigned long int rmnet_shs_crit_err[RMNET_SHS_CRIT_ERR_MAX]; +extern unsigned long rmnet_shs_crit_err[RMNET_SHS_CRIT_ERR_MAX]; extern struct rmnet_shs_cfg_s rmnet_shs_cfg; extern int rmnet_is_real_dev_registered(const struct net_device *real_dev); diff --git a/drivers/rmnet/shs/rmnet_shs_freq.c b/drivers/rmnet/shs/rmnet_shs_freq.c index 0a2fd8e..c6123c6 100644 --- a/drivers/rmnet/shs/rmnet_shs_freq.c +++ b/drivers/rmnet/shs/rmnet_shs_freq.c @@ -88,7 +88,7 @@ void rmnet_shs_reset_freq(void) } } -void rmnet_shs_boost_cpus() +void rmnet_shs_boost_cpus(void) { struct cpu_freq *boost; int i; @@ -110,7 +110,7 @@ void rmnet_shs_boost_cpus() queue_work(shs_boost_wq, &boost_cpu); } -void rmnet_shs_reset_cpus() +void rmnet_shs_reset_cpus(void) { struct cpu_freq *boost; int i; diff --git a/drivers/rmnet/shs/rmnet_shs_main.c b/drivers/rmnet/shs/rmnet_shs_main.c index 2ea09dc..867b16c 100755 --- a/drivers/rmnet/shs/rmnet_shs_main.c +++ b/drivers/rmnet/shs/rmnet_shs_main.c @@ -57,11 +57,11 @@ struct rmnet_shs_cfg_s rmnet_shs_cfg; struct rmnet_shs_flush_work shs_rx_work; /* Delayed workqueue that will be used to flush parked packets*/ -unsigned long int rmnet_shs_switch_reason[RMNET_SHS_SWITCH_MAX_REASON]; +unsigned long rmnet_shs_switch_reason[RMNET_SHS_SWITCH_MAX_REASON]; module_param_array(rmnet_shs_switch_reason, ulong, 0, 0444); MODULE_PARM_DESC(rmnet_shs_switch_reason, "rmnet shs skb core swtich type"); -unsigned long int rmnet_shs_flush_reason[RMNET_SHS_FLUSH_MAX_REASON]; +unsigned long rmnet_shs_flush_reason[RMNET_SHS_FLUSH_MAX_REASON]; module_param_array(rmnet_shs_flush_reason, ulong, 0, 0444); MODULE_PARM_DESC(rmnet_shs_flush_reason, "rmnet shs skb flush trigger type"); @@ -218,7 +218,7 @@ static void rmnet_shs_update_core_load(int cpu, int burst) struct timespec time1; struct timespec *time2; - long int curinterval; + long curinterval; int maxinterval = (rmnet_shs_inst_rate_interval < MIN_MS) ? MIN_MS : rmnet_shs_inst_rate_interval; @@ -305,7 +305,8 @@ static void rmnet_shs_deliver_skb(struct sk_buff *skb) 0xDEF, 0xDEF, 0xDEF, 0xDEF, skb, NULL); if (rmnet_shs_check_skb_can_gro(skb)) { - if ((napi = get_current_napi_context())) { + napi = get_current_napi_context(); + if (napi) { napi_gro_receive(napi, skb); } else { priv = netdev_priv(skb->dev); @@ -327,6 +328,48 @@ static void rmnet_shs_deliver_skb_wq(struct sk_buff *skb) gro_cells_receive(&priv->gro_cells, skb); } +/* Delivers skbs after segmenting, directly to network stack */ +static void rmnet_shs_deliver_skb_segmented(struct sk_buff *in_skb, u8 ctext) +{ + struct sk_buff *skb = NULL; + struct sk_buff *nxt_skb = NULL; + struct sk_buff *segs = NULL; + int count = 0; + + SHS_TRACE_LOW(RMNET_SHS_DELIVER_SKB, RMNET_SHS_DELIVER_SKB_START, + 0x1, 0xDEF, 0xDEF, 0xDEF, in_skb, NULL); + + segs = __skb_gso_segment(in_skb, NETIF_F_SG, false); + if (unlikely(IS_ERR_OR_NULL(segs))) { + if (ctext == RMNET_RX_CTXT) + netif_receive_skb(in_skb); + else + netif_rx(in_skb); + + return; + } + + /* Send segmeneted skb */ + for ((skb = segs); skb != NULL; skb = nxt_skb) { + nxt_skb = skb->next; + + skb->hash = in_skb->hash; + skb->dev = in_skb->dev; + skb->next = NULL; + + if (ctext == RMNET_RX_CTXT) + netif_receive_skb(skb); + else + netif_rx(skb); + + count += 1; + } + + consume_skb(in_skb); + + return; +} + int rmnet_shs_flow_num_perf_cores(struct rmnet_shs_skbn_s *node_p) { int ret = 0; @@ -388,9 +431,9 @@ u8 rmnet_shs_mask_from_map(struct rps_map *map) u8 mask = 0; u8 i; - for (i = 0; i < map->len; i++) { + for (i = 0; i < map->len; i++) mask |= 1 << map->cpus[i]; - } + return mask; } @@ -417,15 +460,14 @@ int rmnet_shs_get_core_prio_flow(u8 mask) */ for (i = 0; i < MAX_CPUS; i++) { - if (!(mask & (1 <<i))) + if (!(mask & (1 << i))) continue; if (mask & (1 << i)) curr_idx++; - if (list_empty(&rmnet_shs_cpu_node_tbl[i].node_list_id)) { + if (list_empty(&rmnet_shs_cpu_node_tbl[i].node_list_id)) return i; - } if (cpu_num_flows[i] <= least_flows || least_flows == INVALID_CPU) { @@ -479,7 +521,7 @@ int rmnet_shs_idx_from_cpu(u8 cpu, u8 mask) ret = idx; break; } - if(mask & (1 << i)) + if (mask & (1 << i)) idx++; } return ret; @@ -532,14 +574,14 @@ int rmnet_shs_get_suggested_cpu(struct rmnet_shs_skbn_s *node) int rmnet_shs_get_hash_map_idx_to_stamp(struct rmnet_shs_skbn_s *node) { int cpu, idx = INVALID_CPU; - cpu = rmnet_shs_get_suggested_cpu(node); + cpu = rmnet_shs_get_suggested_cpu(node); idx = rmnet_shs_idx_from_cpu(cpu, rmnet_shs_cfg.map_mask); - /* If suggested CPU is no longer in mask. Try using current.*/ - if (unlikely(idx < 0)) - idx = rmnet_shs_idx_from_cpu(node->map_cpu, - rmnet_shs_cfg.map_mask); + /* If suggested CPU is no longer in mask. Try using current.*/ + if (unlikely(idx < 0)) + idx = rmnet_shs_idx_from_cpu(node->map_cpu, + rmnet_shs_cfg.map_mask); SHS_TRACE_LOW(RMNET_SHS_HASH_MAP, RMNET_SHS_HASH_MAP_IDX_TO_STAMP, @@ -661,7 +703,7 @@ int rmnet_shs_node_can_flush_pkts(struct rmnet_shs_skbn_s *node, u8 force_flush) break; } node->is_shs_enabled = 1; - if (!map){ + if (!map) { node->is_shs_enabled = 0; ret = 1; break; @@ -682,12 +724,12 @@ int rmnet_shs_node_can_flush_pkts(struct rmnet_shs_skbn_s *node, u8 force_flush) (force_flush)) { if (rmnet_shs_switch_cores) { - /* Move the amount parked to other core's count - * Update old core's parked to not include diverted - * packets and update new core's packets - */ - new_cpu = rmnet_shs_cpu_from_idx(cpu_map_index, - rmnet_shs_cfg.map_mask); + /* Move the amount parked to other core's count + * Update old core's parked to not include diverted + * packets and update new core's packets + */ + new_cpu = rmnet_shs_cpu_from_idx(cpu_map_index, + rmnet_shs_cfg.map_mask); if (new_cpu < 0) { ret = 1; break; @@ -700,7 +742,7 @@ int rmnet_shs_node_can_flush_pkts(struct rmnet_shs_skbn_s *node, u8 force_flush) if (cur_cpu_qhead < node_qhead) { rmnet_shs_switch_reason[RMNET_SHS_OOO_PACKET_SWITCH]++; - rmnet_shs_switch_reason[RMNET_SHS_OOO_PACKET_TOTAL]+= + rmnet_shs_switch_reason[RMNET_SHS_OOO_PACKET_TOTAL] += (node_qhead - cur_cpu_qhead); } @@ -814,6 +856,7 @@ void rmnet_shs_flush_node(struct rmnet_shs_skbn_s *node, u8 ctext) u32 skb_bytes_delivered = 0; u32 hash2stamp = 0; /* the default value of skb->hash*/ u8 map = 0, maplen = 0; + u8 segment_enable = 0; if (!node->skb_list.head) return; @@ -835,6 +878,8 @@ void rmnet_shs_flush_node(struct rmnet_shs_skbn_s *node, u8 ctext) node->skb_list.num_parked_bytes, node, node->skb_list.head); + segment_enable = node->hstats->segment_enable; + for ((skb = node->skb_list.head); skb != NULL; skb = nxt_skb) { nxt_skb = skb->next; @@ -844,11 +889,15 @@ void rmnet_shs_flush_node(struct rmnet_shs_skbn_s *node, u8 ctext) skb->next = NULL; skbs_delivered += 1; skb_bytes_delivered += skb->len; - if (ctext == RMNET_RX_CTXT) - rmnet_shs_deliver_skb(skb); - else - rmnet_shs_deliver_skb_wq(skb); + if (segment_enable) { + rmnet_shs_deliver_skb_segmented(skb, ctext); + } else { + if (ctext == RMNET_RX_CTXT) + rmnet_shs_deliver_skb(skb); + else + rmnet_shs_deliver_skb_wq(skb); + } } node->skb_list.num_parked_skbs = 0; @@ -916,14 +965,14 @@ int rmnet_shs_chk_and_flush_node(struct rmnet_shs_skbn_s *node, SHS_TRACE_HIGH(RMNET_SHS_FLUSH, RMNET_SHS_FLUSH_CHK_AND_FLUSH_NODE_START, - force_flush, 0xDEF, 0xDEF, 0xDEF, + force_flush, ctxt, 0xDEF, 0xDEF, node, NULL); /* Return saved cpu assignment if an entry found*/ if (rmnet_shs_cpu_from_idx(node->map_index, map) != node->map_cpu) { /* Keep flow on the same core if possible - * or put Orphaned flow on the default 1st core - */ + * or put Orphaned flow on the default 1st core + */ map_idx = rmnet_shs_idx_from_cpu(node->map_cpu, map); if (map_idx >= 0) { @@ -1017,8 +1066,8 @@ void rmnet_shs_flush_lock_table(u8 flsh, u8 ctxt) rmnet_shs_cpu_node_tbl[n->map_cpu].parkedlen -= num_pkts_flush; n->skb_list.skb_load = 0; if (n->map_cpu == cpu_num) { - cpu_tail += num_pkts_flush; - n->queue_head = cpu_tail; + cpu_tail += num_pkts_flush; + n->queue_head = cpu_tail; } } @@ -1075,9 +1124,8 @@ void rmnet_shs_flush_lock_table(u8 flsh, u8 ctxt) rmnet_shs_cfg.is_pkt_parked = 0; rmnet_shs_cfg.force_flush_state = RMNET_SHS_FLUSH_DONE; if (rmnet_shs_fall_back_timer) { - if (hrtimer_active(&rmnet_shs_cfg.hrtimer_shs)) { + if (hrtimer_active(&rmnet_shs_cfg.hrtimer_shs)) hrtimer_cancel(&rmnet_shs_cfg.hrtimer_shs); - } } } @@ -1108,7 +1156,7 @@ void rmnet_shs_chain_to_skb_list(struct sk_buff *skb, /* Early flush for TCP if PSH packet. * Flush before parking PSH packet. */ - if (skb->cb[SKB_FLUSH]){ + if (skb->cb[SKB_FLUSH]) { rmnet_shs_flush_lock_table(0, RMNET_RX_CTXT); rmnet_shs_flush_reason[RMNET_SHS_FLUSH_PSH_PKT_FLUSH]++; napi_gro_flush(napi, false); @@ -1182,9 +1230,8 @@ static void rmnet_flush_buffered(struct work_struct *work) if (rmnet_shs_fall_back_timer && rmnet_shs_cfg.num_bytes_parked && rmnet_shs_cfg.num_pkts_parked){ - if(hrtimer_active(&rmnet_shs_cfg.hrtimer_shs)) { + if (hrtimer_active(&rmnet_shs_cfg.hrtimer_shs)) hrtimer_cancel(&rmnet_shs_cfg.hrtimer_shs); - } hrtimer_start(&rmnet_shs_cfg.hrtimer_shs, ns_to_ktime(rmnet_shs_timeout * NS_IN_MS), @@ -1464,7 +1511,7 @@ void rmnet_shs_assign(struct sk_buff *skb, struct rmnet_port *port) return; } - if ((unlikely(!map))|| !rmnet_shs_cfg.rmnet_shs_init_complete) { + if ((unlikely(!map)) || !rmnet_shs_cfg.rmnet_shs_init_complete) { rmnet_shs_deliver_skb(skb); SHS_TRACE_ERR(RMNET_SHS_ASSIGN, RMNET_SHS_ASSIGN_CRIT_ERROR_NO_SHS_REQD, diff --git a/drivers/rmnet/shs/rmnet_shs_wq.c b/drivers/rmnet/shs/rmnet_shs_wq.c index 1ec35ec..09aeed7 100644 --- a/drivers/rmnet/shs/rmnet_shs_wq.c +++ b/drivers/rmnet/shs/rmnet_shs_wq.c @@ -14,8 +14,12 @@ */ #include "rmnet_shs.h" -#include <linux/module.h> +#include "rmnet_shs_wq_genl.h" +#include "rmnet_shs_wq_mem.h" #include <linux/workqueue.h> +#include <linux/list_sort.h> +#include <net/sock.h> +#include <linux/skbuff.h> MODULE_LICENSE("GPL v2"); /* Local Macros */ @@ -149,6 +153,19 @@ unsigned long long rmnet_shs_flow_rx_pps[MAX_SUPPORTED_FLOWS_DEBUG]; module_param_array(rmnet_shs_flow_rx_pps, ullong, 0, 0444); MODULE_PARM_DESC(rmnet_shs_flow_rx_pps, "SHS stamp pkt enq rate per flow"); +/* Counters for suggestions made by wq */ +unsigned long long rmnet_shs_flow_silver_to_gold[MAX_SUPPORTED_FLOWS_DEBUG]; +module_param_array(rmnet_shs_flow_silver_to_gold, ullong, 0, 0444); +MODULE_PARM_DESC(rmnet_shs_flow_silver_to_gold, "SHS Suggest Silver to Gold"); + +unsigned long long rmnet_shs_flow_gold_to_silver[MAX_SUPPORTED_FLOWS_DEBUG]; +module_param_array(rmnet_shs_flow_gold_to_silver, ullong, 0, 0444); +MODULE_PARM_DESC(rmnet_shs_flow_gold_to_silver, "SHS Suggest Gold to Silver"); + +unsigned long long rmnet_shs_flow_gold_balance[MAX_SUPPORTED_FLOWS_DEBUG]; +module_param_array(rmnet_shs_flow_gold_balance, ullong, 0, 0444); +MODULE_PARM_DESC(rmnet_shs_flow_gold_balance, "SHS Suggest Gold Balance"); + static DEFINE_SPINLOCK(rmnet_shs_hstat_tbl_lock); static DEFINE_SPINLOCK(rmnet_shs_ep_lock); @@ -371,10 +388,16 @@ struct rmnet_shs_wq_hstat_s *rmnet_shs_wq_get_new_hstat_node(void) return ret_node; } + void rmnet_shs_wq_create_new_flow(struct rmnet_shs_skbn_s *node_p) { struct timespec time; + if (!node_p) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return; + } + node_p->hstats = rmnet_shs_wq_get_new_hstat_node(); if (node_p->hstats != NULL) { (void)getnstimeofday(&time); @@ -383,6 +406,12 @@ void rmnet_shs_wq_create_new_flow(struct rmnet_shs_skbn_s *node_p) node_p->hstats->skb_tport_proto = node_p->skb_tport_proto; node_p->hstats->current_cpu = node_p->map_cpu; node_p->hstats->suggested_cpu = node_p->map_cpu; + + /* Start TCP flows with segmentation if userspace connected */ + if (rmnet_shs_userspace_connected && + node_p->hstats->skb_tport_proto == IPPROTO_TCP) + node_p->hstats->segment_enable = 1; + node_p->hstats->node = node_p; node_p->hstats->c_epoch = RMNET_SHS_SEC_TO_NSEC(time.tv_sec) + time.tv_nsec; @@ -396,12 +425,107 @@ void rmnet_shs_wq_create_new_flow(struct rmnet_shs_skbn_s *node_p) node_p, node_p->hstats); } + +/* Compute the average pps for a flow based on tuning param + * Often when we decide to switch from a small cluster core, + * it is because of the heavy traffic on that core. In such + * circumstances, we want to switch to a big cluster + * core as soon as possible. Therefore, we will provide a + * greater weightage to the most recent sample compared to + * the previous samples. + * + * On the other hand, when a flow which is on a big cluster + * cpu suddenly starts to receive low traffic we move to a + * small cluster core after observing low traffic for some + * more samples. This approach avoids switching back and forth + * to small cluster cpus due to momentary decrease in data + * traffic. + */ +static u64 rmnet_shs_wq_get_flow_avg_pps(struct rmnet_shs_wq_hstat_s *hnode) +{ + u64 avg_pps, mov_avg_pps; + u16 new_weight, old_weight; + + if (!hnode) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return 0; + } + + if (rmnet_shs_is_lpwr_cpu(hnode->current_cpu)) { + /* More weight to current value */ + new_weight = rmnet_shs_wq_tuning; + old_weight = 100 - rmnet_shs_wq_tuning; + } + + /* computing weighted average per flow, if the flow has just started, + * there is no past values, so we use the current pps as the avg + */ + if (hnode->last_pps == 0) { + avg_pps = hnode->rx_pps; + } else { + mov_avg_pps = (hnode->last_pps + hnode->avg_pps) / 2; + avg_pps = (((new_weight * hnode->rx_pps) + + (old_weight * mov_avg_pps)) / + (new_weight + old_weight)); + } + + return avg_pps; +} + +static u64 rmnet_shs_wq_get_cpu_avg_pps(u16 cpu_num) +{ + u64 avg_pps, mov_avg_pps; + u16 new_weight, old_weight; + struct rmnet_shs_wq_cpu_rx_pkt_q_s *cpu_node; + struct rmnet_shs_wq_rx_flow_s *rx_flow_tbl_p = &rmnet_shs_rx_flow_tbl; + + if (cpu_num >= MAX_CPUS) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_CPU_ERR]++; + return 0; + } + + cpu_node = &rx_flow_tbl_p->cpu_list[cpu_num]; + + if (rmnet_shs_is_lpwr_cpu(cpu_num)) { + /* More weight to current value */ + new_weight = rmnet_shs_wq_tuning; + old_weight = 100 - rmnet_shs_wq_tuning; + } else { + old_weight = rmnet_shs_wq_tuning; + new_weight = 100 - rmnet_shs_wq_tuning; + } + + /* computing weighted average per flow, if the cpu has not past values + * for pps, we use the current value as the average + */ + if (cpu_node->last_rx_pps == 0) { + avg_pps = cpu_node->avg_pps; + } else { + mov_avg_pps = (cpu_node->last_rx_pps + cpu_node->avg_pps) / 2; + avg_pps = (((new_weight * cpu_node->rx_pps) + + (old_weight * mov_avg_pps)) / + (new_weight + old_weight)); + } + + trace_rmnet_shs_wq_high(RMNET_SHS_WQ_CPU_STATS, + RMNET_SHS_WQ_CPU_STATS_CORE2SWITCH_EVAL_CPU, + cpu_num, cpu_node->rx_pps, cpu_node->last_rx_pps, + avg_pps, NULL, NULL); + + return avg_pps; +} + /* Refresh the RPS mask associated with this flow */ void rmnet_shs_wq_update_hstat_rps_msk(struct rmnet_shs_wq_hstat_s *hstat_p) { struct rmnet_shs_skbn_s *node_p = NULL; struct rmnet_shs_wq_ep_s *ep = NULL; + if (!hstat_p) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return; + } + node_p = hstat_p->node; /*Map RPS mask from the endpoint associated with this flow*/ @@ -430,6 +554,11 @@ void rmnet_shs_wq_update_hash_stats_debug(struct rmnet_shs_wq_hstat_s *hstats_p, if (!rmnet_shs_stats_enabled) return; + if (!hstats_p || !node_p) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return; + } + if (hstats_p->stat_idx < 0) { idx = idx % MAX_SUPPORTED_FLOWS_DEBUG; hstats_p->stat_idx = idx; @@ -447,6 +576,12 @@ void rmnet_shs_wq_update_hash_stats_debug(struct rmnet_shs_wq_hstat_s *hstats_p, rmnet_shs_flow_cpu[hstats_p->stat_idx] = hstats_p->current_cpu; rmnet_shs_flow_cpu_recommended[hstats_p->stat_idx] = hstats_p->suggested_cpu; + rmnet_shs_flow_silver_to_gold[hstats_p->stat_idx] = + hstats_p->rmnet_shs_wq_suggs[RMNET_SHS_WQ_SUGG_SILVER_TO_GOLD]; + rmnet_shs_flow_gold_to_silver[hstats_p->stat_idx] = + hstats_p->rmnet_shs_wq_suggs[RMNET_SHS_WQ_SUGG_GOLD_TO_SILVER]; + rmnet_shs_flow_gold_balance[hstats_p->stat_idx] = + hstats_p->rmnet_shs_wq_suggs[RMNET_SHS_WQ_SUGG_GOLD_BALANCE]; } @@ -456,6 +591,11 @@ void rmnet_shs_wq_update_hash_stats_debug(struct rmnet_shs_wq_hstat_s *hstats_p, u8 rmnet_shs_wq_is_hash_rx_new_pkt(struct rmnet_shs_wq_hstat_s *hstats_p, struct rmnet_shs_skbn_s *node_p) { + if (!hstats_p || !node_p) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return 0; + } + if (node_p->num_skb == hstats_p->rx_skb) return 0; @@ -467,6 +607,11 @@ void rmnet_shs_wq_update_hash_tinactive(struct rmnet_shs_wq_hstat_s *hstats_p, { time_t tdiff; + if (!hstats_p || !node_p) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return; + } + tdiff = rmnet_shs_wq_tnsec - hstats_p->c_epoch; hstats_p->inactive_duration = tdiff; @@ -482,10 +627,16 @@ void rmnet_shs_wq_update_hash_stats(struct rmnet_shs_wq_hstat_s *hstats_p) u64 skb_diff, bytes_diff; struct rmnet_shs_skbn_s *node_p; + if (!hstats_p) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return; + } + node_p = hstats_p->node; if (!rmnet_shs_wq_is_hash_rx_new_pkt(hstats_p, node_p)) { hstats_p->rx_pps = 0; + hstats_p->avg_pps = 0; hstats_p->rx_bps = 0; rmnet_shs_wq_update_hash_tinactive(hstats_p, node_p); rmnet_shs_wq_update_hash_stats_debug(hstats_p, node_p); @@ -514,6 +665,8 @@ void rmnet_shs_wq_update_hash_stats(struct rmnet_shs_wq_hstat_s *hstats_p) hstats_p->rx_pps = RMNET_SHS_RX_BPNSEC_TO_BPSEC(skb_diff)/(tdiff); hstats_p->rx_bps = RMNET_SHS_RX_BPNSEC_TO_BPSEC(bytes_diff)/(tdiff); hstats_p->rx_bps = RMNET_SHS_BYTE_TO_BIT(hstats_p->rx_bps); + hstats_p->avg_pps = rmnet_shs_wq_get_flow_avg_pps(hstats_p); + hstats_p->last_pps = hstats_p->rx_pps; rmnet_shs_wq_update_hash_stats_debug(hstats_p, node_p); trace_rmnet_shs_wq_high(RMNET_SHS_WQ_FLOW_STATS, @@ -529,6 +682,16 @@ static void rmnet_shs_wq_refresh_cpu_rates_debug(u16 cpu, if (!rmnet_shs_stats_enabled) return; + if (cpu >= MAX_CPUS) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_CPU_ERR]++; + return; + } + + if (!cpu_p) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return; + } + rmnet_shs_cpu_rx_bps[cpu] = cpu_p->rx_bps; rmnet_shs_cpu_rx_pps[cpu] = cpu_p->rx_pps; rmnet_shs_cpu_rx_flows[cpu] = cpu_p->flows; @@ -597,15 +760,20 @@ static void rmnet_shs_wq_refresh_cpu_stats(u16 cpu) struct rmnet_shs_wq_cpu_rx_pkt_q_s *cpu_p; time_t tdiff; u64 new_skbs, new_bytes; + u64 last_rx_bps, last_rx_pps; u32 new_qhead; + if (cpu >= MAX_CPUS) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_CPU_ERR]++; + return; + } + cpu_p = &rmnet_shs_rx_flow_tbl.cpu_list[cpu]; new_skbs = cpu_p->rx_skbs - cpu_p->last_rx_skbs; new_qhead = rmnet_shs_get_cpu_qhead(cpu); - if (cpu_p->qhead_start == 0) { + if (cpu_p->qhead_start == 0) cpu_p->qhead_start = new_qhead; - } cpu_p->last_qhead = cpu_p->qhead; cpu_p->qhead = new_qhead; @@ -619,23 +787,37 @@ static void rmnet_shs_wq_refresh_cpu_stats(u16 cpu) cpu_p->l_epoch = rmnet_shs_wq_tnsec; cpu_p->rx_bps = 0; cpu_p->rx_pps = 0; + cpu_p->avg_pps = 0; + if (rmnet_shs_userspace_connected) { + rmnet_shs_wq_cpu_caps_list_add(&rmnet_shs_rx_flow_tbl, + cpu_p, &cpu_caps); + } rmnet_shs_wq_refresh_cpu_rates_debug(cpu, cpu_p); return; } tdiff = rmnet_shs_wq_tnsec - cpu_p->l_epoch; new_bytes = cpu_p->rx_bytes - cpu_p->last_rx_bytes; - cpu_p->last_rx_bps = cpu_p->rx_bps; - cpu_p->last_rx_pps = cpu_p->rx_pps; + + last_rx_bps = cpu_p->rx_bps; + last_rx_pps = cpu_p->rx_pps; cpu_p->rx_pps = RMNET_SHS_RX_BPNSEC_TO_BPSEC(new_skbs)/tdiff; cpu_p->rx_bps = RMNET_SHS_RX_BPNSEC_TO_BPSEC(new_bytes)/tdiff; cpu_p->rx_bps = RMNET_SHS_BYTE_TO_BIT(cpu_p->rx_bps); + cpu_p->avg_pps = rmnet_shs_wq_get_cpu_avg_pps(cpu); + cpu_p->last_rx_bps = last_rx_bps; + cpu_p->last_rx_pps = last_rx_pps; cpu_p->l_epoch = rmnet_shs_wq_tnsec; cpu_p->last_rx_skbs = cpu_p->rx_skbs; cpu_p->last_rx_bytes = cpu_p->rx_bytes; cpu_p->rx_bps_est = cpu_p->rx_bps; + if (rmnet_shs_userspace_connected) { + rmnet_shs_wq_cpu_caps_list_add(&rmnet_shs_rx_flow_tbl, + cpu_p, &cpu_caps); + } + trace_rmnet_shs_wq_high(RMNET_SHS_WQ_CPU_STATS, RMNET_SHS_WQ_CPU_STATS_UPDATE, cpu, cpu_p->flows, cpu_p->rx_pps, @@ -643,6 +825,7 @@ static void rmnet_shs_wq_refresh_cpu_stats(u16 cpu) rmnet_shs_wq_refresh_cpu_rates_debug(cpu, cpu_p); } + static void rmnet_shs_wq_refresh_all_cpu_stats(void) { u16 cpu; @@ -666,6 +849,11 @@ void rmnet_shs_wq_update_cpu_rx_tbl(struct rmnet_shs_wq_hstat_s *hstat_p) u64 skb_diff, byte_diff; u16 cpu_num; + if (!hstat_p) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return; + } + node_p = hstat_p->node; if (hstat_p->inactive_duration > 0) @@ -683,10 +871,18 @@ void rmnet_shs_wq_update_cpu_rx_tbl(struct rmnet_shs_wq_hstat_s *hstat_p) if (hstat_p->is_new_flow) { rmnet_shs_wq_cpu_list_add(hstat_p, &tbl_p->cpu_list[cpu_num].hstat_id); + rm_err("SHS_FLOW: adding flow 0x%x on cpu[%d] " + "pps: %llu | avg_pps %llu", + hstat_p->hash, hstat_p->current_cpu, + hstat_p->rx_pps, hstat_p->avg_pps); hstat_p->is_new_flow = 0; } /* check if the flow has switched to another CPU*/ if (cpu_num != hstat_p->current_cpu) { + rm_err("SHS_FLOW: moving flow 0x%x on cpu[%d] to cpu[%d] " + "pps: %llu | avg_pps %llu", + hstat_p->hash, hstat_p->current_cpu, cpu_num, + hstat_p->rx_pps, hstat_p->avg_pps); trace_rmnet_shs_wq_high(RMNET_SHS_WQ_FLOW_STATS, RMNET_SHS_WQ_FLOW_STATS_UPDATE_NEW_CPU, hstat_p->hash, hstat_p->current_cpu, @@ -739,6 +935,85 @@ void rmnet_shs_wq_chng_suggested_cpu(u16 old_cpu, u16 new_cpu, } } +/* Increment the per-flow counter for suggestion type */ +static void rmnet_shs_wq_inc_sugg_type(u32 sugg_type, + struct rmnet_shs_wq_hstat_s *hstat_p) +{ + if (sugg_type >= RMNET_SHS_WQ_SUGG_MAX || hstat_p == NULL) + return; + + hstat_p->rmnet_shs_wq_suggs[sugg_type] += 1; +} + +/* Change suggested cpu, return 1 if suggestion was made, 0 otherwise */ +static int rmnet_shs_wq_chng_flow_cpu(u16 old_cpu, u16 new_cpu, + struct rmnet_shs_wq_ep_s *ep, + u32 hash_to_move, u32 sugg_type) +{ + struct rmnet_shs_skbn_s *node_p; + struct rmnet_shs_wq_hstat_s *hstat_p; + int rc = 0; + u16 bkt; + + if (!ep) { + rmnet_shs_crit_err[RMNET_SHS_WQ_EP_ACCESS_ERR]++; + return 0; + } + + if (old_cpu >= MAX_CPUS || new_cpu >= MAX_CPUS) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_CPU_ERR]++; + return 0; + } + + hash_for_each(RMNET_SHS_HT, bkt, node_p, list) { + if (!node_p) + continue; + + if (!node_p->hstats) + continue; + + hstat_p = node_p->hstats; + + if (hash_to_move != 0) { + /* If hash_to_move is given, only move that flow, + * otherwise move all the flows on that cpu + */ + if (hstat_p->hash != hash_to_move) + continue; + } + + rm_err("SHS_HT: >> sugg cpu %d | old cpu %d | new_cpu %d | " + "map_cpu = %d | flow 0x%x", + hstat_p->suggested_cpu, old_cpu, new_cpu, + node_p->map_cpu, hash_to_move); + + if ((hstat_p->suggested_cpu == old_cpu) && + (node_p->dev == ep->ep)) { + + trace_rmnet_shs_wq_high(RMNET_SHS_WQ_FLOW_STATS, + RMNET_SHS_WQ_FLOW_STATS_SUGGEST_NEW_CPU, + hstat_p->hash, hstat_p->suggested_cpu, + new_cpu, 0xDEF, hstat_p, NULL); + + node_p->hstats->suggested_cpu = new_cpu; + rmnet_shs_wq_inc_sugg_type(sugg_type, hstat_p); + if (hash_to_move) { /* Stop after moving one flow */ + rm_err("SHS_CHNG: moving single flow: flow 0x%x " + "sugg_cpu changed from %d to %d", + hstat_p->hash, old_cpu, + node_p->hstats->suggested_cpu); + return 1; + } + rm_err("SHS_CHNG: moving all flows: flow 0x%x " + "sugg_cpu changed from %d to %d", + hstat_p->hash, old_cpu, + node_p->hstats->suggested_cpu); + rc |= 1; + } + } + return rc; +} + u64 rmnet_shs_wq_get_max_pps_among_cores(u32 core_msk) { int cpu_num; @@ -849,9 +1124,8 @@ u16 rmnet_shs_wq_find_cpu_to_move_flows(u16 current_cpu, * for a few ticks and reset it afterwards */ - if (rmnet_shs_cpu_node_tbl[current_cpu].wqprio) { + if (rmnet_shs_cpu_node_tbl[current_cpu].wqprio) return current_cpu; - } for (cpu_num = 0; cpu_num < MAX_CPUS; cpu_num++) { @@ -910,6 +1184,273 @@ void rmnet_shs_wq_find_cpu_and_move_flows(u16 cur_cpu) rmnet_shs_wq_chng_suggested_cpu(cur_cpu, new_cpu, ep); } } + +/* Return 1 if we can move a flow to dest_cpu for this endpoint, + * otherwise return 0. Basically check rps mask and cpu is online + * Also check that dest cpu is not isolated + */ +int rmnet_shs_wq_check_cpu_move_for_ep(u16 current_cpu, u16 dest_cpu, + struct rmnet_shs_wq_ep_s *ep) +{ + u16 cpu_in_rps_mask = 0; + + if (!ep) { + rmnet_shs_crit_err[RMNET_SHS_WQ_EP_ACCESS_ERR]++; + return 0; + } + + if (current_cpu >= MAX_CPUS || dest_cpu >= MAX_CPUS) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_CPU_ERR]++; + return 0; + } + + cpu_in_rps_mask = (1 << dest_cpu) & ep->rps_config_msk; + + rm_err("SHS_MASK: cur cpu [%d] | dest_cpu [%d] | " + "cpu isolation_mask = 0x%x | ep_rps_mask = 0x%x | " + "cpu_online(dest) = %d cpu_in_rps_mask = %d | " + "cpu isolated(dest) = %d", + current_cpu, dest_cpu, __cpu_isolated_mask, ep->rps_config_msk, + cpu_online(dest_cpu), cpu_in_rps_mask, cpu_isolated(dest_cpu)); + + /* We cannot move to dest cpu if the cur cpu is the same, + * the dest cpu is offline, dest cpu is not in the rps mask, + * or if the dest cpu is isolated + */ + if (current_cpu == dest_cpu || !cpu_online(dest_cpu) || + !cpu_in_rps_mask || cpu_isolated(dest_cpu)) { + return 0; + } + + return 1; +} + +/* rmnet_shs_wq_try_to_move_flow - try to make a flow suggestion + * return 1 if flow move was suggested, otherwise return 0 + */ +int rmnet_shs_wq_try_to_move_flow(u16 cur_cpu, u16 dest_cpu, u32 hash_to_move, + u32 sugg_type) +{ + struct rmnet_shs_wq_ep_s *ep; + + if (cur_cpu >= MAX_CPUS || dest_cpu >= MAX_CPUS) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_CPU_ERR]++; + return 0; + } + + /* Traverse end-point list, check if cpu can be used, based + * on it if is online, rps mask, isolation, etc. then make + * suggestion to change the cpu for the flow by passing its hash + */ + list_for_each_entry(ep, &rmnet_shs_wq_ep_tbl, ep_list_id) { + if (!ep) + continue; + + if (!ep->is_ep_active) + continue; + + if (!rmnet_shs_wq_check_cpu_move_for_ep(cur_cpu, + dest_cpu, + ep)) { + rm_err("SHS_FDESC: >> Cannot move flow 0x%x on ep" + " from cpu[%d] to cpu[%d]", + hash_to_move, cur_cpu, dest_cpu); + continue; + } + + if (rmnet_shs_wq_chng_flow_cpu(cur_cpu, dest_cpu, ep, + hash_to_move, sugg_type)) { + rm_err("SHS_FDESC: >> flow 0x%x was suggested to" + " move from cpu[%d] to cpu[%d] sugg_type [%d]", + hash_to_move, cur_cpu, dest_cpu, sugg_type); + return 1; + } + } + return 0; +} + +/* Change flow segmentation, return 1 if set, 0 otherwise */ +int rmnet_shs_wq_set_flow_segmentation(u32 hash_to_set, u8 seg_enable) +{ + struct rmnet_shs_skbn_s *node_p; + struct rmnet_shs_wq_hstat_s *hstat_p; + u16 bkt; + + hash_for_each(RMNET_SHS_HT, bkt, node_p, list) { + if (!node_p) + continue; + + if (!node_p->hstats) + continue; + + hstat_p = node_p->hstats; + + if (hstat_p->hash != hash_to_set) + continue; + + rm_err("SHS_HT: >> segmentation on hash 0x%x enable %u", + hash_to_set, seg_enable); + + trace_rmnet_shs_wq_high(RMNET_SHS_WQ_FLOW_STATS, + RMNET_SHS_WQ_FLOW_STATS_SET_FLOW_SEGMENTATION, + hstat_p->hash, seg_enable, + 0xDEF, 0xDEF, hstat_p, NULL); + + node_p->hstats->segment_enable = seg_enable; + return 1; + } + + rm_err("SHS_HT: >> segmentation on hash 0x%x enable %u not set - hash not found", + hash_to_set, seg_enable); + return 0; +} + + +/* Comparison function to sort gold flow loads - based on flow avg_pps + * return -1 if a is before b, 1 if a is after b, 0 if equal + */ +int cmp_fn_flow_pps(void *priv, struct list_head *a, struct list_head *b) +{ + struct rmnet_shs_wq_gold_flow_s *flow_a; + struct rmnet_shs_wq_gold_flow_s *flow_b; + + if (!a || !b) + return 0; + + flow_a = list_entry(a, struct rmnet_shs_wq_gold_flow_s, gflow_list); + flow_b = list_entry(b, struct rmnet_shs_wq_gold_flow_s, gflow_list); + + if (flow_a->avg_pps > flow_b->avg_pps) + return -1; + else if (flow_a->avg_pps < flow_b->avg_pps) + return 1; + + return 0; +} + +/* Comparison function to sort cpu capacities - based on cpu avg_pps capacity + * return -1 if a is before b, 1 if a is after b, 0 if equal + */ +int cmp_fn_cpu_pps(void *priv, struct list_head *a, struct list_head *b) +{ + struct rmnet_shs_wq_cpu_cap_s *cpu_a; + struct rmnet_shs_wq_cpu_cap_s *cpu_b; + + if (!a || !b) + return 0; + + cpu_a = list_entry(a, struct rmnet_shs_wq_cpu_cap_s, cpu_cap_list); + cpu_b = list_entry(b, struct rmnet_shs_wq_cpu_cap_s, cpu_cap_list); + + if (cpu_a->avg_pps_capacity > cpu_b->avg_pps_capacity) + return -1; + else if (cpu_a->avg_pps_capacity < cpu_b->avg_pps_capacity) + return 1; + + return 0; +} + + +/* Prints cpu stats and flows to dmesg for debugging */ +void rmnet_shs_wq_debug_print_flows(void) +{ + struct rmnet_shs_wq_rx_flow_s *rx_flow_tbl_p = &rmnet_shs_rx_flow_tbl; + struct rmnet_shs_wq_cpu_rx_pkt_q_s *cpu_node; + struct rmnet_shs_wq_hstat_s *hnode; + int flows, i; + u16 cpu_num = 0; + + if (!RMNET_SHS_DEBUG) + return; + + for (cpu_num = 0; cpu_num < MAX_CPUS; cpu_num++) { + cpu_node = &rx_flow_tbl_p->cpu_list[cpu_num]; + flows = rx_flow_tbl_p->cpu_list[cpu_num].flows; + + rm_err("SHS_CPU: cpu[%d]: flows=%d pps=%llu bps=%llu " + "qhead_diff %u qhead_total = %u qhead_start = %u " + "qhead = %u qhead_last = %u isolated = %d ", + cpu_num, flows, cpu_node->rx_pps, cpu_node->rx_bps, + cpu_node->qhead_diff, cpu_node->qhead_total, + cpu_node->qhead_start, + cpu_node->qhead, cpu_node->last_qhead, + cpu_isolated(cpu_num)); + + list_for_each_entry(hnode, + &rmnet_shs_wq_hstat_tbl, + hstat_node_id) { + if (!hnode) + continue; + + if (hnode->in_use == 0) + continue; + + if (hnode->node) { + if (hnode->current_cpu == cpu_num) + rm_err("SHS_CPU: > flow 0x%x " + "with pps %llu avg_pps %llu rx_bps %llu ", + hnode->hash, hnode->rx_pps, + hnode->avg_pps, hnode->rx_bps); + } + } /* loop per flow */ + + for (i = 0; i < 3 - flows; i++) { + rm_err("%s", "SHS_CPU: > "); + } + } /* loop per cpu */ +} + +/* Prints the sorted gold flow list to dmesg */ +void rmnet_shs_wq_debug_print_sorted_gold_flows(struct list_head *gold_flows) +{ + struct rmnet_shs_wq_gold_flow_s *gflow_node; + + if (!RMNET_SHS_DEBUG) + return; + + if (!gold_flows) { + rm_err("%s", "SHS_GDMA: Gold Flows List is NULL"); + return; + } + + rm_err("%s", "SHS_GDMA: List of sorted gold flows:"); + list_for_each_entry(gflow_node, gold_flows, gflow_list) { + if (!gflow_node) + continue; + + rm_err("SHS_GDMA: > flow 0x%x with pps %llu on cpu[%d]", + gflow_node->hash, gflow_node->rx_pps, + gflow_node->cpu_num); + } +} + +/* Userspace evaluation. we send userspace the response to the sync message + * after we update shared memory. shsusr will send a netlink message if + * flows should be moved around. + */ +void rmnet_shs_wq_eval_cpus_caps_and_flows(struct list_head *cpu_caps, + struct list_head *gold_flows, + struct list_head *ss_flows) +{ + if (!cpu_caps || !gold_flows || !ss_flows) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return; + } + + list_sort(NULL, cpu_caps, &cmp_fn_cpu_pps); + list_sort(NULL, gold_flows, &cmp_fn_flow_pps); + + rmnet_shs_wq_mem_update_cached_cpu_caps(cpu_caps); + rmnet_shs_wq_mem_update_cached_sorted_gold_flows(gold_flows); + rmnet_shs_wq_mem_update_cached_sorted_ss_flows(ss_flows); + + rmnet_shs_genl_send_int_to_userspace_no_info(RMNET_SHS_SYNC_RESP_INT); + + trace_rmnet_shs_wq_high(RMNET_SHS_WQ_SHSUSR, RMNET_SHS_WQ_SHSUSR_SYNC_END, + 0xDEF, 0xDEF, 0xDEF, 0xDEF, NULL, NULL); +} + +/* Default wq evaluation logic, use this if rmnet_shs_userspace_connected is 0 */ void rmnet_shs_wq_eval_suggested_cpu(void) { @@ -1100,7 +1641,7 @@ int rmnet_shs_wq_get_lpwr_cpu_new_flow(struct net_device *dev) } /* Increment CPU assignment idx to be ready for next flow assignment*/ - if ((cpu_assigned >= 0)|| ((ep->new_lo_idx + 1) >= ep->new_lo_max)) + if ((cpu_assigned >= 0) || ((ep->new_lo_idx + 1) >= ep->new_lo_max)) ep->new_lo_idx = ((ep->new_lo_idx + 1) % ep->new_lo_max); return cpu_assigned; @@ -1209,6 +1750,10 @@ void rmnet_shs_wq_cleanup_hash_tbl(u8 force_clean) hash_del_rcu(&node_p->list); kfree(node_p); } + rm_err("SHS_FLOW: removing flow 0x%x on cpu[%d] " + "pps: %llu avg_pps: %llu", + hnode->hash, hnode->current_cpu, + hnode->rx_pps, hnode->avg_pps); rmnet_shs_wq_cpu_list_remove(hnode); if (hnode->is_perm == 0 || force_clean) { rmnet_shs_wq_hstat_tbl_remove(hnode); @@ -1258,6 +1803,11 @@ void rmnet_shs_wq_reset_ep_active(struct net_device *dev) struct rmnet_shs_wq_ep_s *tmp = NULL; unsigned long flags; + if (!dev) { + rmnet_shs_crit_err[RMNET_SHS_NETDEV_ERR]++; + return; + } + spin_lock_irqsave(&rmnet_shs_ep_lock, flags); list_for_each_entry_safe(ep, tmp, &rmnet_shs_wq_ep_tbl, ep_list_id) { if (!ep) @@ -1279,6 +1829,11 @@ void rmnet_shs_wq_set_ep_active(struct net_device *dev) struct rmnet_shs_wq_ep_s *ep = NULL; unsigned long flags; + if (!dev) { + rmnet_shs_crit_err[RMNET_SHS_NETDEV_ERR]++; + return; + } + spin_lock_irqsave(&rmnet_shs_ep_lock, flags); ep = kzalloc(sizeof(*ep), GFP_ATOMIC); @@ -1352,15 +1907,40 @@ void rmnet_shs_wq_update_stats(void) if (hnode->node) { rmnet_shs_wq_update_hash_stats(hnode); rmnet_shs_wq_update_cpu_rx_tbl(hnode); + + if (rmnet_shs_userspace_connected) { + if (!rmnet_shs_is_lpwr_cpu(hnode->current_cpu)) { + /* Add golds flows to list */ + rmnet_shs_wq_gflow_list_add(hnode, &gflows); + } + if (hnode->skb_tport_proto == IPPROTO_TCP) { + rmnet_shs_wq_ssflow_list_add(hnode, &ssflows); + } + } else { + /* Disable segmentation if userspace gets disconnected connected */ + hnode->node->hstats->segment_enable = 0; + } } } rmnet_shs_wq_refresh_all_cpu_stats(); rmnet_shs_wq_refresh_total_stats(); rmnet_shs_wq_refresh_dl_mrkr_stats(); - rmnet_shs_wq_eval_suggested_cpu(); + + if (rmnet_shs_userspace_connected) { + rm_err("%s", "SHS_UPDATE: Userspace connected, relying on userspace evaluation"); + rmnet_shs_wq_eval_cpus_caps_and_flows(&cpu_caps, &gflows, &ssflows); + rmnet_shs_wq_cleanup_gold_flow_list(&gflows); + rmnet_shs_wq_cleanup_ss_flow_list(&ssflows); + rmnet_shs_wq_cleanup_cpu_caps_list(&cpu_caps); + } else { + rm_err("%s", "SHS_UPDATE: shs userspace not connected, using default logic"); + rmnet_shs_wq_eval_suggested_cpu(); + } + rmnet_shs_wq_refresh_new_flow_list(); /*Invoke after both the locks are released*/ rmnet_shs_wq_cleanup_hash_tbl(PERIODIC_CLEAN); + rmnet_shs_wq_debug_print_flows(); } void rmnet_shs_wq_process_wq(struct work_struct *work) @@ -1409,6 +1989,9 @@ void rmnet_shs_wq_exit(void) if (!rmnet_shs_wq || !rmnet_shs_delayed_wq) return; + rmnet_shs_wq_genl_deinit(); + rmnet_shs_wq_mem_deinit(); + trace_rmnet_shs_wq_high(RMNET_SHS_WQ_EXIT, RMNET_SHS_WQ_EXIT_START, 0xDEF, 0xDEF, 0xDEF, 0xDEF, NULL, NULL); @@ -1439,6 +2022,7 @@ void rmnet_shs_wq_init_cpu_rx_flow_tbl(void) rx_flow_tbl_p = &rmnet_shs_rx_flow_tbl.cpu_list[cpu_num]; INIT_LIST_HEAD(&rx_flow_tbl_p->hstat_id); + rx_flow_tbl_p->cpu_num = cpu_num; } } @@ -1463,6 +2047,13 @@ void rmnet_shs_wq_init(struct net_device *dev) if (rmnet_shs_wq) return; + if (!dev) { + rmnet_shs_crit_err[RMNET_SHS_NETDEV_ERR]++; + return; + } + + rmnet_shs_wq_mem_init(); + trace_rmnet_shs_wq_high(RMNET_SHS_WQ_INIT, RMNET_SHS_WQ_INIT_START, 0xDEF, 0xDEF, 0xDEF, 0xDEF, NULL, NULL); rmnet_shs_wq = alloc_workqueue("rmnet_shs_wq", @@ -1487,9 +2078,14 @@ void rmnet_shs_wq_init(struct net_device *dev) INIT_DEFERRABLE_WORK(&rmnet_shs_delayed_wq->wq, rmnet_shs_wq_process_wq); + if (rmnet_shs_wq_genl_init()) { + rm_err("%s", "SHS_GNL: Failed to init generic netlink"); + } + trace_rmnet_shs_wq_high(RMNET_SHS_WQ_INIT, RMNET_SHS_WQ_INIT_END, 0xDEF, 0xDEF, 0xDEF, 0xDEF, NULL, NULL); } + int rmnet_shs_wq_get_num_cpu_flows(u16 cpu) { int flows = -1; @@ -1561,6 +2157,11 @@ int rmnet_shs_wq_get_max_flows_per_cluster(u16 cpu) void rmnet_shs_wq_inc_cpu_flow(u16 cpu) { + if (cpu >= MAX_CPUS) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_CPU_ERR]++; + return; + } + rmnet_shs_rx_flow_tbl.cpu_list[cpu].flows++; trace_rmnet_shs_wq_low(RMNET_SHS_WQ_CPU_STATS, @@ -1571,6 +2172,11 @@ void rmnet_shs_wq_inc_cpu_flow(u16 cpu) void rmnet_shs_wq_dec_cpu_flow(u16 cpu) { + if (cpu >= MAX_CPUS) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_CPU_ERR]++; + return; + } + if (rmnet_shs_rx_flow_tbl.cpu_list[cpu].flows > 0) rmnet_shs_rx_flow_tbl.cpu_list[cpu].flows--; @@ -1582,5 +2188,11 @@ void rmnet_shs_wq_dec_cpu_flow(u16 cpu) u64 rmnet_shs_wq_get_max_allowed_pps(u16 cpu) { + + if (cpu >= MAX_CPUS) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_CPU_ERR]++; + return 0; + } + return rmnet_shs_cpu_rx_max_pps_thresh[cpu]; } diff --git a/drivers/rmnet/shs/rmnet_shs_wq.h b/drivers/rmnet/shs/rmnet_shs_wq.h index 90d1604..ed37dc8 100644 --- a/drivers/rmnet/shs/rmnet_shs_wq.h +++ b/drivers/rmnet/shs/rmnet_shs_wq.h @@ -19,6 +19,11 @@ #include "rmnet_shs_config.h" #include "rmnet_shs.h" +#define RMNET_SHS_DEBUG 0 + +#define rm_err(fmt, ...) \ + do { if (RMNET_SHS_DEBUG) pr_err(fmt, __VA_ARGS__); } while (0) + #define MAX_SUPPORTED_FLOWS_DEBUG 16 #define RMNET_SHS_RX_BPNSEC_TO_BPSEC(x) ((x)*1000000000) @@ -28,6 +33,9 @@ #define RMNET_SHS_MIN_HSTAT_NODES_REQD 16 #define RMNET_SHS_WQ_DELAY_TICKS 10 +extern unsigned long long rmnet_shs_cpu_rx_max_pps_thresh[MAX_CPUS]__read_mostly; +extern unsigned long long rmnet_shs_cpu_rx_min_pps_thresh[MAX_CPUS]__read_mostly; + /* stores wq and end point details */ struct rmnet_shs_wq_ep_s { @@ -50,7 +58,17 @@ struct list_head ep_id; struct rmnet_shs_wq_ep_s ep; }; +/* Types of suggestions made by shs wq */ +enum rmnet_shs_wq_suggestion_type { + RMNET_SHS_WQ_SUGG_NONE, + RMNET_SHS_WQ_SUGG_SILVER_TO_GOLD, + RMNET_SHS_WQ_SUGG_GOLD_TO_SILVER, + RMNET_SHS_WQ_SUGG_GOLD_BALANCE, + RMNET_SHS_WQ_SUGG_MAX, +}; + struct rmnet_shs_wq_hstat_s { + unsigned long int rmnet_shs_wq_suggs[RMNET_SHS_WQ_SUGG_MAX]; struct list_head cpu_node_id; struct list_head hstat_node_id; struct rmnet_shs_skbn_s *node; //back pointer to node @@ -61,6 +79,8 @@ struct rmnet_shs_wq_hstat_s { u64 rx_bytes; u64 rx_pps; /*pkts per second*/ u64 rx_bps; /*bits per second*/ + u64 last_pps; + u64 avg_pps; u64 last_rx_skb; u64 last_rx_bytes; u32 rps_config_msk; /*configured rps mask for net device*/ @@ -69,13 +89,14 @@ struct rmnet_shs_wq_hstat_s { u32 pri_core_msk; /* priority cores availability mask*/ u32 available_core_msk; /* other available cores for this flow*/ u32 hash; /*skb hash*/ + int stat_idx; /*internal used for datatop*/ u16 suggested_cpu; /* recommended CPU to stamp pkts*/ u16 current_cpu; /* core where the flow is being processed*/ u16 skb_tport_proto; - int stat_idx; /*internal used for datatop*/ u8 in_use; u8 is_perm; u8 is_new_flow; + u8 segment_enable; /* segment coalesces packets */ }; struct rmnet_shs_wq_cpu_rx_pkt_q_s { @@ -97,6 +118,7 @@ struct rmnet_shs_wq_cpu_rx_pkt_q_s { u32 qhead_start; /* start mark of total pp*/ u32 qhead_total; /* end mark of total pp*/ int flows; + u16 cpu_num; }; struct rmnet_shs_wq_rx_flow_s { @@ -134,7 +156,32 @@ struct rmnet_shs_delay_wq_s { struct delayed_work wq; }; +/* Structures to be used for creating sorted versions of flow and cpu lists */ +struct rmnet_shs_wq_cpu_cap_s { + struct list_head cpu_cap_list; + u64 pps_capacity; + u64 avg_pps_capacity; + u16 cpu_num; +}; + +struct rmnet_shs_wq_gold_flow_s { + struct list_head gflow_list; + u64 rx_pps; + u64 avg_pps; + u32 hash; + u16 cpu_num; +}; + +struct rmnet_shs_wq_ss_flow_s { + struct list_head ssflow_list; + u64 rx_pps; + u64 avg_pps; + u64 rx_bps; + u32 hash; + u16 cpu_num; +}; +/* Tracing Definitions */ enum rmnet_shs_wq_trace_func { RMNET_SHS_WQ_INIT, RMNET_SHS_WQ_PROCESS_WQ, @@ -145,6 +192,7 @@ enum rmnet_shs_wq_trace_func { RMNET_SHS_WQ_FLOW_STATS, RMNET_SHS_WQ_CPU_STATS, RMNET_SHS_WQ_TOTAL_STATS, + RMNET_SHS_WQ_SHSUSR, }; enum rmnet_shs_wq_trace_evt { @@ -201,8 +249,13 @@ enum rmnet_shs_wq_trace_evt { RMNET_SHS_WQ_INIT_END, RMNET_SHS_WQ_EXIT_START, RMNET_SHS_WQ_EXIT_END, - - + RMNET_SHS_WQ_TRY_PASS, + RMNET_SHS_WQ_TRY_FAIL, + RMNET_SHS_WQ_SHSUSR_SYNC_START, + RMNET_SHS_WQ_SHSUSR_SYNC_END, + RMNET_SHS_WQ_FLOW_STATS_SET_FLOW_SEGMENTATION, + RMNET_SHS_WQ_FLOW_SEG_SET_PASS, + RMNET_SHS_WQ_FLOW_SEG_SET_FAIL, }; extern struct rmnet_shs_cpu_node_s rmnet_shs_cpu_node_tbl[MAX_CPUS]; @@ -226,4 +279,10 @@ void rmnet_shs_hstat_tbl_delete(void); void rmnet_shs_wq_set_ep_active(struct net_device *dev); void rmnet_shs_wq_reset_ep_active(struct net_device *dev); void rmnet_shs_wq_refresh_new_flow_list(void); + +int rmnet_shs_wq_try_to_move_flow(u16 cur_cpu, u16 dest_cpu, u32 hash_to_move, + u32 sugg_type); + +int rmnet_shs_wq_set_flow_segmentation(u32 hash_to_set, u8 seg_enable); + #endif /*_RMNET_SHS_WQ_H_*/ diff --git a/drivers/rmnet/shs/rmnet_shs_wq_genl.c b/drivers/rmnet/shs/rmnet_shs_wq_genl.c new file mode 100644 index 0000000..7d07ace --- /dev/null +++ b/drivers/rmnet/shs/rmnet_shs_wq_genl.c @@ -0,0 +1,358 @@ +/* Copyright (c) 2019 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. + * + * RMNET Data Smart Hash Workqueue Generic Netlink Functions + * + */ + +#include "rmnet_shs_wq_genl.h" +#include <net/sock.h> +#include <linux/skbuff.h> + +MODULE_LICENSE("GPL v2"); + +static struct net *last_net; +static u32 last_snd_portid; + +uint32_t rmnet_shs_genl_seqnum; +int rmnet_shs_userspace_connected; + +/* Static Functions and Definitions */ +static struct nla_policy rmnet_shs_genl_attr_policy[RMNET_SHS_GENL_ATTR_MAX + 1] = { + [RMNET_SHS_GENL_ATTR_INT] = { .type = NLA_S32 }, + [RMNET_SHS_GENL_ATTR_SUGG] = { .len = sizeof(struct rmnet_shs_wq_sugg_info) }, + [RMNET_SHS_GENL_ATTR_SEG] = { .len = sizeof(struct rmnet_shs_wq_seg_info) }, + [RMNET_SHS_GENL_ATTR_STR] = { .type = NLA_NUL_STRING }, +}; + +#define RMNET_SHS_GENL_OP(_cmd, _func) \ + { \ + .cmd = _cmd, \ + .policy = rmnet_shs_genl_attr_policy, \ + .doit = _func, \ + .dumpit = NULL, \ + .flags = 0, \ + } + +static const struct genl_ops rmnet_shs_genl_ops[] = { + RMNET_SHS_GENL_OP(RMNET_SHS_GENL_CMD_INIT_DMA, + rmnet_shs_genl_dma_init), + RMNET_SHS_GENL_OP(RMNET_SHS_GENL_CMD_TRY_TO_MOVE_FLOW, + rmnet_shs_genl_try_to_move_flow), + RMNET_SHS_GENL_OP(RMNET_SHS_GENL_CMD_SET_FLOW_SEGMENTATION, + rmnet_shs_genl_set_flow_segmentation), + RMNET_SHS_GENL_OP(RMNET_SHS_GENL_CMD_MEM_SYNC, + rmnet_shs_genl_mem_sync), +}; + +struct genl_family rmnet_shs_genl_family = { + .hdrsize = 0, + .name = RMNET_SHS_GENL_FAMILY_NAME, + .version = RMNET_SHS_GENL_VERSION, + .maxattr = RMNET_SHS_GENL_ATTR_MAX, + .ops = rmnet_shs_genl_ops, + .n_ops = ARRAY_SIZE(rmnet_shs_genl_ops), +}; + +int rmnet_shs_genl_send_int_to_userspace(struct genl_info *info, int val) +{ + struct sk_buff *skb; + void *msg_head; + int rc; + + skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + if (skb == NULL) + goto out; + + msg_head = genlmsg_put(skb, 0, info->snd_seq+1, &rmnet_shs_genl_family, + 0, RMNET_SHS_GENL_CMD_INIT_DMA); + if (msg_head == NULL) { + rc = -ENOMEM; + goto out; + } + rc = nla_put_u32(skb, RMNET_SHS_GENL_ATTR_INT, val); + if (rc != 0) + goto out; + + genlmsg_end(skb, msg_head); + + rc = genlmsg_unicast(genl_info_net(info), skb, info->snd_portid); + if (rc != 0) + goto out; + + rm_err("SHS_GNL: Successfully sent int %d\n", val); + return 0; + +out: + /* TODO: Need to free skb?? */ + rm_err("SHS_GNL: FAILED to send int %d\n", val); + return -1; +} + +int rmnet_shs_genl_send_int_to_userspace_no_info(int val) +{ + struct sk_buff *skb; + void *msg_head; + int rc; + + if (last_net == NULL) { + rm_err("SHS_GNL: FAILED to send int %d - last_net is NULL\n", + val); + return -1; + } + + skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + if (skb == NULL) + goto out; + + msg_head = genlmsg_put(skb, 0, rmnet_shs_genl_seqnum++, &rmnet_shs_genl_family, + 0, RMNET_SHS_GENL_CMD_INIT_DMA); + if (msg_head == NULL) { + rc = -ENOMEM; + goto out; + } + rc = nla_put_u32(skb, RMNET_SHS_GENL_ATTR_INT, val); + if (rc != 0) + goto out; + + genlmsg_end(skb, msg_head); + + rc = genlmsg_unicast(last_net, skb, last_snd_portid); + if (rc != 0) + goto out; + + rm_err("SHS_GNL: Successfully sent int %d\n", val); + return 0; + +out: + /* TODO: Need to free skb?? */ + rm_err("SHS_GNL: FAILED to send int %d\n", val); + rmnet_shs_userspace_connected = 0; + return -1; +} + + +int rmnet_shs_genl_send_msg_to_userspace(void) +{ + struct sk_buff *skb; + void *msg_head; + int rc; + int val = rmnet_shs_genl_seqnum++; + + rm_err("SHS_GNL: Trying to send msg %d\n", val); + skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + if (skb == NULL) + goto out; + + msg_head = genlmsg_put(skb, 0, rmnet_shs_genl_seqnum++, &rmnet_shs_genl_family, + 0, RMNET_SHS_GENL_CMD_INIT_DMA); + if (msg_head == NULL) { + rc = -ENOMEM; + goto out; + } + rc = nla_put_u32(skb, RMNET_SHS_GENL_ATTR_INT, val); + if (rc != 0) + goto out; + + genlmsg_end(skb, msg_head); + + genlmsg_multicast(&rmnet_shs_genl_family, skb, 0, 0, GFP_ATOMIC); + + rm_err("SHS_GNL: Successfully sent int %d\n", val); + return 0; + +out: + /* TODO: Need to free skb?? */ + rm_err("SHS_GNL: FAILED to send int %d\n", val); + rmnet_shs_userspace_connected = 0; + return -1; +} + +/* Currently unused - handles message from userspace to initialize the shared memory, + * memory is inited by kernel wq automatically + */ +int rmnet_shs_genl_dma_init(struct sk_buff *skb_2, struct genl_info *info) +{ + rm_err("%s", "SHS_GNL: rmnet_shs_genl_dma_init"); + + if (info == NULL) { + rm_err("%s", "SHS_GNL: an error occured - info is null"); + return -1; + } + + return 0; +} + + +int rmnet_shs_genl_set_flow_segmentation(struct sk_buff *skb_2, struct genl_info *info) +{ + struct nlattr *na; + struct rmnet_shs_wq_seg_info seg_info; + int rc = 0; + + rm_err("%s", "SHS_GNL: rmnet_shs_genl_set_flow_segmentation"); + + if (info == NULL) { + rm_err("%s", "SHS_GNL: an error occured - info is null"); + return -1; + } + + na = info->attrs[RMNET_SHS_GENL_ATTR_SEG]; + if (na) { + if (nla_memcpy(&seg_info, na, sizeof(seg_info)) > 0) { + rm_err("SHS_GNL: recv segmentation req " + "hash_to_set = 0x%x segment_enable = %u", + seg_info.hash_to_set, + seg_info.segment_enable); + + rc = rmnet_shs_wq_set_flow_segmentation(seg_info.hash_to_set, + seg_info.segment_enable); + + if (rc == 1) { + rmnet_shs_genl_send_int_to_userspace(info, 0); + trace_rmnet_shs_wq_high(RMNET_SHS_WQ_SHSUSR, + RMNET_SHS_WQ_FLOW_SEG_SET_PASS, + seg_info.hash_to_set, seg_info.segment_enable, + 0xDEF, 0xDEF, NULL, NULL); + } else { + rmnet_shs_genl_send_int_to_userspace(info, -1); + trace_rmnet_shs_wq_high(RMNET_SHS_WQ_SHSUSR, + RMNET_SHS_WQ_FLOW_SEG_SET_FAIL, + seg_info.hash_to_set, seg_info.segment_enable, + 0xDEF, 0xDEF, NULL, NULL); + return 0; + } + } else { + rm_err("SHS_GNL: nla_memcpy failed %d\n", + RMNET_SHS_GENL_ATTR_SEG); + rmnet_shs_genl_send_int_to_userspace(info, -1); + return 0; + } + } else { + rm_err("SHS_GNL: no info->attrs %d\n", + RMNET_SHS_GENL_ATTR_SEG); + rmnet_shs_genl_send_int_to_userspace(info, -1); + return 0; + } + + return 0; +} + +int rmnet_shs_genl_try_to_move_flow(struct sk_buff *skb_2, struct genl_info *info) +{ + struct nlattr *na; + struct rmnet_shs_wq_sugg_info sugg_info; + int rc = 0; + + rm_err("%s", "SHS_GNL: rmnet_shs_genl_try_to_move_flow"); + + if (info == NULL) { + rm_err("%s", "SHS_GNL: an error occured - info is null"); + return -1; + } + + na = info->attrs[RMNET_SHS_GENL_ATTR_SUGG]; + if (na) { + if (nla_memcpy(&sugg_info, na, sizeof(sugg_info)) > 0) { + rm_err("SHS_GNL: cur_cpu =%u dest_cpu = %u " + "hash_to_move = 0x%x sugg_type = %u", + sugg_info.cur_cpu, + sugg_info.dest_cpu, + sugg_info.hash_to_move, + sugg_info.sugg_type); + rc = rmnet_shs_wq_try_to_move_flow(sugg_info.cur_cpu, + sugg_info.dest_cpu, + sugg_info.hash_to_move, + sugg_info.sugg_type); + if (rc == 1) { + rmnet_shs_genl_send_int_to_userspace(info, 0); + trace_rmnet_shs_wq_high(RMNET_SHS_WQ_SHSUSR, RMNET_SHS_WQ_TRY_PASS, + sugg_info.cur_cpu, sugg_info.dest_cpu, + sugg_info.hash_to_move, sugg_info.sugg_type, NULL, NULL); + + } else { + rmnet_shs_genl_send_int_to_userspace(info, -1); + trace_rmnet_shs_wq_high(RMNET_SHS_WQ_SHSUSR, RMNET_SHS_WQ_TRY_FAIL, + sugg_info.cur_cpu, sugg_info.dest_cpu, + sugg_info.hash_to_move, sugg_info.sugg_type, NULL, NULL); + return 0; + } + } else { + rm_err("SHS_GNL: nla_memcpy failed %d\n", + RMNET_SHS_GENL_ATTR_SUGG); + rmnet_shs_genl_send_int_to_userspace(info, -1); + return 0; + } + } else { + rm_err("SHS_GNL: no info->attrs %d\n", + RMNET_SHS_GENL_ATTR_SUGG); + rmnet_shs_genl_send_int_to_userspace(info, -1); + return 0; + } + + return 0; +} + +int rmnet_shs_genl_mem_sync(struct sk_buff *skb_2, struct genl_info *info) +{ + rm_err("%s", "SHS_GNL: rmnet_shs_genl_mem_sync"); + + if (!rmnet_shs_userspace_connected) + rmnet_shs_userspace_connected = 1; + + /* Todo: detect when userspace is disconnected. If we dont get + * a sync message in the next 2 wq ticks, we got disconnected + */ + + trace_rmnet_shs_wq_high(RMNET_SHS_WQ_SHSUSR, RMNET_SHS_WQ_SHSUSR_SYNC_START, + 0xDEF, 0xDEF, 0xDEF, 0xDEF, NULL, NULL); + + if (info == NULL) { + rm_err("%s", "SHS_GNL: an error occured - info is null"); + return -1; + } + + last_net = genl_info_net(info); + last_snd_portid = info->snd_portid; + return 0; +} + +/* register new generic netlink family */ +int rmnet_shs_wq_genl_init(void) +{ + int ret; + + rmnet_shs_userspace_connected = 0; + ret = genl_register_family(&rmnet_shs_genl_family); + if (ret != 0) { + rm_err("SHS_GNL: register family failed: %i", ret); + genl_unregister_family(&rmnet_shs_genl_family); + return -1; + } + + rm_err("SHS_GNL: successfully registered generic netlink familiy: %s", + RMNET_SHS_GENL_FAMILY_NAME); + + return 0; +} + +/* Unregister the generic netlink family */ +int rmnet_shs_wq_genl_deinit(void) +{ + int ret; + + ret = genl_unregister_family(&rmnet_shs_genl_family); + if(ret != 0){ + rm_err("SHS_GNL: unregister family failed: %i\n",ret); + } + rmnet_shs_userspace_connected = 0; + return 0; +} diff --git a/drivers/rmnet/shs/rmnet_shs_wq_genl.h b/drivers/rmnet/shs/rmnet_shs_wq_genl.h new file mode 100644 index 0000000..333de48 --- /dev/null +++ b/drivers/rmnet/shs/rmnet_shs_wq_genl.h @@ -0,0 +1,76 @@ +/* Copyright (c) 2019 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. + * + * RMNET Data Smart Hash stamping solution + * + */ + +#ifndef _RMNET_SHS_WQ_GENL_H_ +#define _RMNET_SHS_WQ_GENL_H_ + +#include "rmnet_shs.h" +#include <net/genetlink.h> + +/* Generic Netlink Definitions */ +#define RMNET_SHS_GENL_VERSION 1 +#define RMNET_SHS_GENL_FAMILY_NAME "RMNET_SHS" +#define RMNET_SHS_SYNC_RESP_INT 828 /* Any number, sent after mem update */ + +extern int rmnet_shs_userspace_connected; + +enum { + RMNET_SHS_GENL_CMD_UNSPEC, + RMNET_SHS_GENL_CMD_INIT_DMA, + RMNET_SHS_GENL_CMD_TRY_TO_MOVE_FLOW, + RMNET_SHS_GENL_CMD_SET_FLOW_SEGMENTATION, + RMNET_SHS_GENL_CMD_MEM_SYNC, + __RMNET_SHS_GENL_CMD_MAX, +}; + +enum { + RMNET_SHS_GENL_ATTR_UNSPEC, + RMNET_SHS_GENL_ATTR_STR, + RMNET_SHS_GENL_ATTR_INT, + RMNET_SHS_GENL_ATTR_SUGG, + RMNET_SHS_GENL_ATTR_SEG, + __RMNET_SHS_GENL_ATTR_MAX, +}; +#define RMNET_SHS_GENL_ATTR_MAX (__RMNET_SHS_GENL_ATTR_MAX - 1) + +struct rmnet_shs_wq_sugg_info { + uint32_t hash_to_move; + uint32_t sugg_type; + uint16_t cur_cpu; + uint16_t dest_cpu; +}; + +struct rmnet_shs_wq_seg_info { + uint32_t hash_to_set; + uint32_t segment_enable; +}; + +/* Function Prototypes */ +int rmnet_shs_genl_dma_init(struct sk_buff *skb_2, struct genl_info *info); +int rmnet_shs_genl_try_to_move_flow(struct sk_buff *skb_2, struct genl_info *info); +int rmnet_shs_genl_set_flow_segmentation(struct sk_buff *skb_2, struct genl_info *info); +int rmnet_shs_genl_mem_sync(struct sk_buff *skb_2, struct genl_info *info); + +int rmnet_shs_genl_send_int_to_userspace(struct genl_info *info, int val); + +int rmnet_shs_genl_send_int_to_userspace_no_info(int val); + +int rmnet_shs_genl_send_msg_to_userspace(void); + +int rmnet_shs_wq_genl_init(void); + +int rmnet_shs_wq_genl_deinit(void); + +#endif /*_RMNET_SHS_WQ_GENL_H_*/ diff --git a/drivers/rmnet/shs/rmnet_shs_wq_mem.c b/drivers/rmnet/shs/rmnet_shs_wq_mem.c new file mode 100644 index 0000000..bb5dca8 --- /dev/null +++ b/drivers/rmnet/shs/rmnet_shs_wq_mem.c @@ -0,0 +1,609 @@ +/* Copyright (c) 2019 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. + * + * RMNET Data Smart Hash Workqueue Generic Netlink Functions + * + */ + +#include "rmnet_shs_wq_mem.h" +#include <linux/proc_fs.h> + +MODULE_LICENSE("GPL v2"); + +struct proc_dir_entry *shs_proc_dir; + +/* Fixed arrays to copy to userspace over netlink */ +struct rmnet_shs_wq_cpu_cap_usr_s rmnet_shs_wq_cap_list_usr[MAX_CPUS]; +struct rmnet_shs_wq_gflows_usr_s rmnet_shs_wq_gflows_usr[RMNET_SHS_MAX_USRFLOWS]; +struct rmnet_shs_wq_ssflows_usr_s rmnet_shs_wq_ssflows_usr[RMNET_SHS_MAX_USRFLOWS]; + +struct list_head gflows = LIST_HEAD_INIT(gflows); /* gold flows */ +struct list_head ssflows = LIST_HEAD_INIT(ssflows); /* slow start flows */ +struct list_head cpu_caps = LIST_HEAD_INIT(cpu_caps); /* capacities */ + +struct rmnet_shs_mmap_info *cap_shared; +struct rmnet_shs_mmap_info *gflow_shared; +struct rmnet_shs_mmap_info *ssflow_shared; + +/* Static Functions and Definitions */ +static void rmnet_shs_vm_open(struct vm_area_struct *vma) +{ + return; +} + +static void rmnet_shs_vm_close(struct vm_area_struct *vma) +{ + return; +} + +static int rmnet_shs_vm_fault(struct vm_fault *vmf) +{ + struct page *page = NULL; + struct rmnet_shs_mmap_info *info; + + + info = (struct rmnet_shs_mmap_info *) vmf->vma->vm_private_data; + if (info->data) { + page = virt_to_page(info->data); + get_page(page); + vmf->page = page; + } + + return 0; +} + +static const struct vm_operations_struct rmnet_shs_vm_ops = { + .close = rmnet_shs_vm_close, + .open = rmnet_shs_vm_open, + .fault = rmnet_shs_vm_fault, +}; + +static int rmnet_shs_mmap(struct file *filp, struct vm_area_struct *vma) +{ + vma->vm_ops = &rmnet_shs_vm_ops; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; + vma->vm_private_data = filp->private_data; + + return 0; +} + +static int rmnet_shs_open_caps(struct inode *inode, struct file *filp) +{ + struct rmnet_shs_mmap_info *info; + + rm_err("%s", "SHS_MEM: rmnet_shs_open - entry\n"); + if (!cap_shared) { + info = kzalloc(sizeof(struct rmnet_shs_mmap_info), GFP_KERNEL); + if (!info) { + rm_err("%s", "SHS_MEM: rmnet_shs_open - FAILED\n"); + return -ENOMEM; + } + info->data = (char *)get_zeroed_page(GFP_KERNEL); + cap_shared = info; + rm_err("SHS_MEM: virt_to_phys = 0x%llx cap_shared = 0x%llx\n", + (unsigned long long)virt_to_phys((void *)info), + (unsigned long long)virt_to_phys((void *)cap_shared)); + } + + filp->private_data = cap_shared; + + rm_err("%s", "SHS_MEM: rmnet_shs_open - OK\n"); + + return 0; +} + +static int rmnet_shs_open_g_flows(struct inode *inode, struct file *filp) +{ + struct rmnet_shs_mmap_info *info; + + rm_err("%s", "SHS_MEM: rmnet_shs_open g_flows - entry\n"); + if (!gflow_shared) { + info = kzalloc(sizeof(struct rmnet_shs_mmap_info), GFP_KERNEL); + if (!info) { + rm_err("%s", "SHS_MEM: rmnet_shs_open - FAILED\n"); + return -ENOMEM; + } + info->data = (char *)get_zeroed_page(GFP_KERNEL); + gflow_shared = info; + rm_err("SHS_MEM: virt_to_phys = 0x%llx gflow_shared = 0x%llx\n", + (unsigned long long)virt_to_phys((void *)info), + (unsigned long long)virt_to_phys((void *)gflow_shared)); + } + filp->private_data = gflow_shared; + return 0; +} + +static int rmnet_shs_open_ss_flows(struct inode *inode, struct file *filp) +{ + struct rmnet_shs_mmap_info *info; + + rm_err("%s", "SHS_MEM: rmnet_shs_open ss_flows - entry\n"); + if (!ssflow_shared) { + info = kzalloc(sizeof(struct rmnet_shs_mmap_info), GFP_KERNEL); + if (!info) { + rm_err("%s", "SHS_MEM: rmnet_shs_open - FAILED\n"); + return -ENOMEM; + } + info->data = (char *)get_zeroed_page(GFP_KERNEL); + ssflow_shared = info; + rm_err("SHS_MEM: virt_to_phys = 0x%llx ssflow_shared = 0x%llx\n", + (unsigned long long)virt_to_phys((void *)info), + (unsigned long long)virt_to_phys((void *)ssflow_shared)); + } + filp->private_data = ssflow_shared; + return 0; +} + +static ssize_t rmnet_shs_read(struct file *filp, char __user *buf, size_t len, loff_t *off) +{ + struct rmnet_shs_mmap_info *info; + int ret; + + rm_err("%s", "SHS_MEM: rmnet_shs_read - entry\n"); + info = filp->private_data; + ret = min_t(size_t, len, RMNET_SHS_BUFFER_SIZE); + if (copy_to_user(buf, info->data, ret)) + ret = -EFAULT; + + return 0; +} + +static ssize_t rmnet_shs_write(struct file *filp, const char __user *buf, size_t len, loff_t *off) +{ + struct rmnet_shs_mmap_info *info; + int ret; + + rm_err("%s", "SHS_MEM: rmnet_shs_write - entry\n"); + info = filp->private_data; + ret = min_t(size_t, len, RMNET_SHS_BUFFER_SIZE); + if (copy_from_user(info->data, buf, ret)) + return -EFAULT; + else + return len; +} + +static int rmnet_shs_release_caps(struct inode *inode, struct file *filp) +{ + struct rmnet_shs_mmap_info *info; + + rm_err("%s", "SHS_MEM: rmnet_shs_release - entry\n"); + if (cap_shared) { + info = filp->private_data; + cap_shared = NULL; + free_page((unsigned long)info->data); + kfree(info); + filp->private_data = NULL; + } + return 0; +} + +static int rmnet_shs_release_g_flows(struct inode *inode, struct file *filp) +{ + struct rmnet_shs_mmap_info *info; + + rm_err("%s", "SHS_MEM: rmnet_shs_release - entry\n"); + if (gflow_shared) { + info = filp->private_data; + gflow_shared = NULL; + free_page((unsigned long)info->data); + kfree(info); + filp->private_data = NULL; + } + return 0; +} + +static int rmnet_shs_release_ss_flows(struct inode *inode, struct file *filp) +{ + struct rmnet_shs_mmap_info *info; + + rm_err("%s", "SHS_MEM: rmnet_shs_release - entry\n"); + if (gflow_shared) { + info = filp->private_data; + ssflow_shared = NULL; + free_page((unsigned long)info->data); + kfree(info); + filp->private_data = NULL; + } + return 0; +} + +static const struct file_operations rmnet_shs_caps_fops = { + .owner = THIS_MODULE, + .mmap = rmnet_shs_mmap, + .open = rmnet_shs_open_caps, + .release = rmnet_shs_release_caps, + .read = rmnet_shs_read, + .write = rmnet_shs_write, +}; + +static const struct file_operations rmnet_shs_g_flows_fops = { + .owner = THIS_MODULE, + .mmap = rmnet_shs_mmap, + .open = rmnet_shs_open_g_flows, + .release = rmnet_shs_release_g_flows, + .read = rmnet_shs_read, + .write = rmnet_shs_write, +}; + +static const struct file_operations rmnet_shs_ss_flows_fops = { + .owner = THIS_MODULE, + .mmap = rmnet_shs_mmap, + .open = rmnet_shs_open_ss_flows, + .release = rmnet_shs_release_ss_flows, + .read = rmnet_shs_read, + .write = rmnet_shs_write, +}; + + +/* Global Functions */ +/* Add a flow to the slow start flow list */ +void rmnet_shs_wq_ssflow_list_add(struct rmnet_shs_wq_hstat_s *hnode, + struct list_head *ss_flows) +{ + struct rmnet_shs_wq_ss_flow_s *ssflow_node; + + if (!hnode || !ss_flows) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return; + } + + ssflow_node = kzalloc(sizeof(*ssflow_node), GFP_KERNEL); + if (ssflow_node != NULL) { + ssflow_node->avg_pps = hnode->avg_pps; + ssflow_node->cpu_num = hnode->current_cpu; + ssflow_node->hash = hnode->hash; + ssflow_node->rx_pps = hnode->rx_pps; + ssflow_node->rx_bps = hnode->rx_bps; + + list_add(&ssflow_node->ssflow_list, ss_flows); + } else { + rmnet_shs_crit_err[RMNET_SHS_WQ_NODE_MALLOC_ERR]++; + } +} + +/* Clean up slow start flow list */ +void rmnet_shs_wq_cleanup_ss_flow_list(struct list_head *ss_flows) +{ + struct rmnet_shs_wq_ss_flow_s *ssflow_node; + struct list_head *ptr, *next; + + if (!ss_flows) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return; + } + + list_for_each_safe(ptr, next, ss_flows) { + ssflow_node = list_entry(ptr, + struct rmnet_shs_wq_ss_flow_s, + ssflow_list); + if (!ssflow_node) + continue; + + list_del_init(&ssflow_node->ssflow_list); + kfree(ssflow_node); + } +} + +/* Add a flow to the gold flow list */ +void rmnet_shs_wq_gflow_list_add(struct rmnet_shs_wq_hstat_s *hnode, + struct list_head *gold_flows) +{ + struct rmnet_shs_wq_gold_flow_s *gflow_node; + + if (!hnode || !gold_flows) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return; + } + + if (!rmnet_shs_is_lpwr_cpu(hnode->current_cpu)) { + gflow_node = kzalloc(sizeof(*gflow_node), GFP_KERNEL); + if (gflow_node != NULL) { + gflow_node->avg_pps = hnode->avg_pps; + gflow_node->cpu_num = hnode->current_cpu; + gflow_node->hash = hnode->hash; + gflow_node->rx_pps = hnode->rx_pps; + + list_add(&gflow_node->gflow_list, gold_flows); + } else { + rmnet_shs_crit_err[RMNET_SHS_WQ_NODE_MALLOC_ERR]++; + } + } +} + +/* Clean up gold flow list */ +void rmnet_shs_wq_cleanup_gold_flow_list(struct list_head *gold_flows) +{ + struct rmnet_shs_wq_gold_flow_s *gflow_node; + struct list_head *ptr, *next; + + if (!gold_flows) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return; + } + + list_for_each_safe(ptr, next, gold_flows) { + gflow_node = list_entry(ptr, + struct rmnet_shs_wq_gold_flow_s, + gflow_list); + if (!gflow_node) + continue; + + list_del_init(&gflow_node->gflow_list); + kfree(gflow_node); + } +} + +/* Add a cpu to the cpu capacities list */ +void rmnet_shs_wq_cpu_caps_list_add( + struct rmnet_shs_wq_rx_flow_s *rx_flow_tbl_p, + struct rmnet_shs_wq_cpu_rx_pkt_q_s *cpu_node, + struct list_head *cpu_caps) +{ + u64 pps_uthresh, pps_lthresh = 0; + struct rmnet_shs_wq_cpu_cap_s *cap_node; + int flows = 0; + + if (!cpu_node || !cpu_caps) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return; + } + + flows = rx_flow_tbl_p->cpu_list[cpu_node->cpu_num].flows; + + pps_uthresh = rmnet_shs_cpu_rx_max_pps_thresh[cpu_node->cpu_num]; + pps_lthresh = rmnet_shs_cpu_rx_min_pps_thresh[cpu_node->cpu_num]; + + cap_node = kzalloc(sizeof(*cap_node), GFP_KERNEL); + if (cap_node == NULL) { + rmnet_shs_crit_err[RMNET_SHS_WQ_NODE_MALLOC_ERR]++; + return; + } + + cap_node->cpu_num = cpu_node->cpu_num; + + /* No flows means capacity is upper threshold */ + if (flows <= 0) { + cap_node->pps_capacity = pps_uthresh; + cap_node->avg_pps_capacity = pps_uthresh; + list_add(&cap_node->cpu_cap_list, cpu_caps); + return; + } + + /* Instantaneous PPS capacity */ + if (cpu_node->rx_pps < pps_uthresh) { + cap_node->pps_capacity = + pps_uthresh - cpu_node->rx_pps; + } else { + cap_node->pps_capacity = 0; + } + + /* Average PPS capacity */ + if (cpu_node->avg_pps < pps_uthresh) { + cap_node->avg_pps_capacity = + pps_uthresh - cpu_node->avg_pps; + } else { + cap_node->avg_pps_capacity = 0; + } + + list_add(&cap_node->cpu_cap_list, cpu_caps); +} + +/* Clean up cpu capacities list */ +/* Can reuse this memory since num cpus doesnt change */ +void rmnet_shs_wq_cleanup_cpu_caps_list(struct list_head *cpu_caps) +{ + struct rmnet_shs_wq_cpu_cap_s *cap_node; + struct list_head *ptr, *next; + + if (!cpu_caps) { + rmnet_shs_crit_err[RMNET_SHS_WQ_INVALID_PTR_ERR]++; + return; + } + + list_for_each_safe(ptr, next, cpu_caps) { + cap_node = list_entry(ptr, + struct rmnet_shs_wq_cpu_cap_s, + cpu_cap_list); + if (!cap_node) + continue; + + list_del_init(&cap_node->cpu_cap_list); + kfree(cap_node); + } +} + +/* Converts the kernel linked list to an array. Then memcpy to shared mem + * > The cpu capacity linked list is sorted: highest capacity first + * | cap_0 | cap_1 | cap_2 | ... | cap_7 | + */ +void rmnet_shs_wq_mem_update_cached_cpu_caps(struct list_head *cpu_caps) +{ + struct rmnet_shs_wq_cpu_cap_s *cap_node; + + uint16_t idx = 0; + + if (!cpu_caps) { + rm_err("%s", "SHS_SCAPS: CPU Capacities List is NULL"); + return; + } + + rm_err("%s", "SHS_SCAPS: Sorted CPU Capacities:"); + list_for_each_entry(cap_node, cpu_caps, cpu_cap_list) { + if (!cap_node) + continue; + + if (idx >= MAX_CPUS) + break; + + rm_err("SHS_SCAPS: > cpu[%d] with pps capacity = %llu | " + "avg pps cap = %llu", + cap_node->cpu_num, cap_node->pps_capacity, + cap_node->avg_pps_capacity); + + rmnet_shs_wq_cap_list_usr[idx].avg_pps_capacity = cap_node->avg_pps_capacity; + rmnet_shs_wq_cap_list_usr[idx].pps_capacity = cap_node->pps_capacity; + rmnet_shs_wq_cap_list_usr[idx].cpu_num = cap_node->cpu_num; + idx += 1; + } + + rm_err("SHS_MEM: cap_dma_ptr = 0x%llx addr = 0x%pK\n", + (unsigned long long)virt_to_phys((void *)cap_shared), cap_shared); + if (!cap_shared) { + rm_err("%s", "SHS_WRITE: cap_shared is NULL"); + return; + } + memcpy((char *) cap_shared->data, + (void *) &rmnet_shs_wq_cap_list_usr[0], + sizeof(rmnet_shs_wq_cap_list_usr)); +} + +/* Convert the kernel linked list of gold flows into an array that can be + * memcpy'd to shared memory. + * > Add number of flows at the beginning of the shared memory address. + * > After memcpy is complete, send userspace a message indicating that memcpy + * has just completed. + * > The gold flow list is sorted: heaviest gold flow is first + * | num_flows | flow_1 | flow_2 | ... | flow_n | ... | + * | 16 bits | ... | + */ +void rmnet_shs_wq_mem_update_cached_sorted_gold_flows(struct list_head *gold_flows) +{ + struct rmnet_shs_wq_gold_flow_s *gflow_node; + uint16_t idx = 0; + int num_gold_flows = 0; + + if (!gold_flows) { + rm_err("%s", "SHS_SGOLD: Gold Flows List is NULL"); + return; + } + + rm_err("%s", "SHS_SGOLD: List of sorted gold flows:"); + list_for_each_entry(gflow_node, gold_flows, gflow_list) { + if (!gflow_node) + continue; + + rm_err("SHS_SGOLD: > flow 0x%x with pps %llu on cpu[%d]", + gflow_node->hash, gflow_node->rx_pps, + gflow_node->cpu_num); + num_gold_flows += 1; + + + /* Update the cached gold flow list */ + rmnet_shs_wq_gflows_usr[idx].cpu_num = gflow_node->cpu_num; + rmnet_shs_wq_gflows_usr[idx].hash = gflow_node->hash; + rmnet_shs_wq_gflows_usr[idx].avg_pps = gflow_node->avg_pps; + rmnet_shs_wq_gflows_usr[idx].rx_pps = gflow_node->rx_pps; + idx += 1; + } + + rm_err("SHS_MEM: gflow_dma_ptr = 0x%llx addr = 0x%pK\n", + (unsigned long long)virt_to_phys((void *)gflow_shared), + gflow_shared); + + if (!gflow_shared) { + rm_err("%s", "SHS_WRITE: gflow_shared is NULL"); + return; + } + + rm_err("SHS_SGOLD: num gold flows = %u\n", idx); + + /* Copy num gold flows into first 2 bytes, + then copy in the cached gold flow array */ + memcpy(((char *)gflow_shared->data), &idx, sizeof(idx)); + memcpy(((char *)gflow_shared->data + sizeof(uint16_t)), + (void *) &rmnet_shs_wq_gflows_usr[0], + sizeof(rmnet_shs_wq_gflows_usr)); +} + +/* Convert the kernel linked list of slow start tcp flows into an array that can be + * memcpy'd to shared memory. + * > Add number of flows at the beginning of the shared memory address. + * > After memcpy is complete, send userspace a message indicating that memcpy + * has just completed. + * > The ss flow list is sorted: heaviest ss flow is first + * | num_flows | flow_1 | flow_2 | ... | flow_n | ... | + * | 16 bits | ... | + */ +void rmnet_shs_wq_mem_update_cached_sorted_ss_flows(struct list_head *ss_flows) +{ + struct rmnet_shs_wq_ss_flow_s *ssflow_node; + uint16_t idx = 0; + int num_ss_flows = 0; + + if (!ss_flows) { + rm_err("%s", "SHS_SLOW: SS Flows List is NULL"); + return; + } + + rm_err("%s", "SHS_SLOW: List of sorted ss flows:"); + list_for_each_entry(ssflow_node, ss_flows, ssflow_list) { + if (!ssflow_node) + continue; + + rm_err("SHS_SLOW: > flow 0x%x with pps %llu on cpu[%d]", + ssflow_node->hash, ssflow_node->rx_pps, + ssflow_node->cpu_num); + num_ss_flows += 1; + + /* Update the cached ss flow list */ + rmnet_shs_wq_ssflows_usr[idx].cpu_num = ssflow_node->cpu_num; + rmnet_shs_wq_ssflows_usr[idx].hash = ssflow_node->hash; + rmnet_shs_wq_ssflows_usr[idx].avg_pps = ssflow_node->avg_pps; + rmnet_shs_wq_ssflows_usr[idx].rx_pps = ssflow_node->rx_pps; + rmnet_shs_wq_ssflows_usr[idx].rx_bps = ssflow_node->rx_bps; + idx += 1; + } + + rm_err("SHS_MEM: ssflow_dma_ptr = 0x%llx addr = 0x%pK\n", + (unsigned long long)virt_to_phys((void *)ssflow_shared), + ssflow_shared); + + if (!ssflow_shared) { + rm_err("%s", "SHS_WRITE: ssflow_shared is NULL"); + return; + } + + rm_err("SHS_SLOW: num ss flows = %u\n", idx); + + /* Copy num ss flows into first 2 bytes, + then copy in the cached gold flow array */ + memcpy(((char *)ssflow_shared->data), &idx, sizeof(idx)); + memcpy(((char *)ssflow_shared->data + sizeof(uint16_t)), + (void *) &rmnet_shs_wq_ssflows_usr[0], + sizeof(rmnet_shs_wq_ssflows_usr)); +} + +/* Creates the proc folder and files for shs shared memory */ +void rmnet_shs_wq_mem_init(void) +{ + shs_proc_dir = proc_mkdir("shs", NULL); + + proc_create(RMNET_SHS_PROC_CAPS, 0644, shs_proc_dir, &rmnet_shs_caps_fops); + proc_create(RMNET_SHS_PROC_G_FLOWS, 0644, shs_proc_dir, &rmnet_shs_g_flows_fops); + proc_create(RMNET_SHS_PROC_SS_FLOWS, 0644, shs_proc_dir, &rmnet_shs_ss_flows_fops); + + cap_shared = NULL; + gflow_shared = NULL; + ssflow_shared = NULL; +} + +/* Remove shs files and folders from proc fs */ +void rmnet_shs_wq_mem_deinit(void) +{ + remove_proc_entry(RMNET_SHS_PROC_CAPS, shs_proc_dir); + remove_proc_entry(RMNET_SHS_PROC_G_FLOWS, shs_proc_dir); + remove_proc_entry(RMNET_SHS_PROC_SS_FLOWS, shs_proc_dir); + remove_proc_entry(RMNET_SHS_PROC_DIR, NULL); + + cap_shared = NULL; + gflow_shared = NULL; + ssflow_shared = NULL; +} diff --git a/drivers/rmnet/shs/rmnet_shs_wq_mem.h b/drivers/rmnet/shs/rmnet_shs_wq_mem.h new file mode 100644 index 0000000..f348e2b --- /dev/null +++ b/drivers/rmnet/shs/rmnet_shs_wq_mem.h @@ -0,0 +1,89 @@ +/* Copyright (c) 2019 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. + * + * RMNET Data Smart Hash stamping solution + * + */ + +#ifndef _RMNET_SHS_WQ_MEM_H_ +#define _RMNET_SHS_WQ_MEM_H_ + +#include "rmnet_shs.h" + +/* Shared memory files */ +#define RMNET_SHS_PROC_DIR "shs" +#define RMNET_SHS_PROC_CAPS "rmnet_shs_caps" +#define RMNET_SHS_PROC_G_FLOWS "rmnet_shs_flows" +#define RMNET_SHS_PROC_SS_FLOWS "rmnet_shs_ss_flows" + +#define RMNET_SHS_MAX_USRFLOWS (128) + +struct rmnet_shs_wq_cpu_cap_usr_s { + u64 pps_capacity; + u64 avg_pps_capacity; + u64 bps_capacity; + u16 cpu_num; +}; + +struct rmnet_shs_wq_gflows_usr_s { + u64 rx_pps; + u64 avg_pps; + u64 rx_bps; + u32 hash; + u16 cpu_num; +}; + +struct rmnet_shs_wq_ssflows_usr_s { + u64 rx_pps; + u64 avg_pps; + u64 rx_bps; + u32 hash; + u16 cpu_num; +}; + +extern struct list_head gflows; +extern struct list_head ssflows; +extern struct list_head cpu_caps; + +/* Buffer size for read and write syscalls */ +enum {RMNET_SHS_BUFFER_SIZE = 4096}; + +struct rmnet_shs_mmap_info { + char *data; +}; + +/* Function Definitions */ + +void rmnet_shs_wq_ssflow_list_add(struct rmnet_shs_wq_hstat_s *hnode, + struct list_head *ss_flows); +void rmnet_shs_wq_gflow_list_add(struct rmnet_shs_wq_hstat_s *hnode, + struct list_head *gold_flows); + +void rmnet_shs_wq_cleanup_gold_flow_list(struct list_head *gold_flows); +void rmnet_shs_wq_cleanup_ss_flow_list(struct list_head *ss_flows); + +void rmnet_shs_wq_cpu_caps_list_add( + struct rmnet_shs_wq_rx_flow_s *rx_flow_tbl_p, + struct rmnet_shs_wq_cpu_rx_pkt_q_s *cpu_node, + struct list_head *cpu_caps); + +void rmnet_shs_wq_cleanup_cpu_caps_list(struct list_head *cpu_caps); + +void rmnet_shs_wq_mem_update_cached_cpu_caps(struct list_head *cpu_caps); + +void rmnet_shs_wq_mem_update_cached_sorted_gold_flows(struct list_head *gold_flows); +void rmnet_shs_wq_mem_update_cached_sorted_ss_flows(struct list_head *ss_flows); + +void rmnet_shs_wq_mem_init(void); + +void rmnet_shs_wq_mem_deinit(void); + +#endif /*_RMNET_SHS_WQ_GENL_H_*/ |