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iwlwifi: mvm: simplify calculating scan dwells and other timing values 

Remove timing values from iwl_mvm_scan_params and use defines and
arrays of values instead.

While at that fix few values and corner cases and align all OSs
to ChromeOS values.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
Reviewed-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
David Spinadel 2015-06-22 13:20:00 +03:00 committed by Emmanuel Grumbach
parent 80de4321a6
commit 9437e99410
1 changed files with 88 additions and 81 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

169
drivers/net/wireless/iwlwifi/mvm/scan.c
View File

@ -72,10 +72,60 @@
#define IWL_DENSE_EBS_SCAN_RATIO 5
#define IWL_SPARSE_EBS_SCAN_RATIO 1
struct iwl_mvm_scan_params {
u32 max_out_time;
enum iwl_mvm_scan_type {
IWL_SCAN_TYPE_UNASSOC,
IWL_SCAN_TYPE_WILD,
IWL_SCAN_TYPE_MILD,
IWL_SCAN_TYPE_FRAGMENTED,
};
enum iwl_mvm_traffic_load {
IWL_MVM_TRAFFIC_LOW,
IWL_MVM_TRAFFIC_MEDIUM,
IWL_MVM_TRAFFIC_HIGH,
};
struct iwl_mvm_scan_timing_params {
u32 dwell_active;
u32 dwell_passive;
u32 dwell_fragmented;
u32 suspend_time;
bool passive_fragmented;
u32 max_out_time;
};
static struct iwl_mvm_scan_timing_params scan_timing[] = {
[IWL_SCAN_TYPE_UNASSOC] = {
.dwell_active = 10,
.dwell_passive = 110,
.dwell_fragmented = 44,
.suspend_time = 0,
.max_out_time = 0,
},
[IWL_SCAN_TYPE_WILD] = {
.dwell_active = 10,
.dwell_passive = 110,
.dwell_fragmented = 44,
.suspend_time = 30,
.max_out_time = 120,
},
[IWL_SCAN_TYPE_MILD] = {
.dwell_active = 10,
.dwell_passive = 110,
.dwell_fragmented = 44,
.suspend_time = 120,
.max_out_time = 120,
},
[IWL_SCAN_TYPE_FRAGMENTED] = {
.dwell_active = 10,
.dwell_passive = 110,
.dwell_fragmented = 44,
.suspend_time = 95,
.max_out_time = 44,
},
};
struct iwl_mvm_scan_params {
enum iwl_mvm_scan_type type;
u32 n_channels;
u16 delay;
int n_ssids;
@ -90,9 +140,6 @@ struct iwl_mvm_scan_params {
int n_match_sets;
struct iwl_scan_probe_req preq;
struct cfg80211_match_set *match_sets;
u16 passive_dwell;
u16 active_dwell;
u16 fragmented_dwell;
struct {
u8 iterations;
u8 full_scan_mul; /* not used for UMAC */
@ -156,76 +203,39 @@ static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
*global_cnt += 1;
}
static void iwl_mvm_scan_calc_dwell(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct iwl_mvm_scan_params *params)
static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
{
return IWL_MVM_TRAFFIC_LOW;
}
static enum
iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct iwl_mvm_scan_params *params)
{
int global_cnt = 0;
u8 frag_passive_dwell = 0;
enum iwl_mvm_traffic_load load;
bool low_latency;
ieee80211_iterate_active_interfaces_atomic(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_scan_condition_iterator,
&global_cnt);
if (!global_cnt)
goto not_bound;
return IWL_SCAN_TYPE_UNASSOC;
params->suspend_time = 30;
params->max_out_time = 120;
load = iwl_mvm_get_traffic_load(mvm);
low_latency = iwl_mvm_low_latency(mvm);
if (iwl_mvm_low_latency(mvm)) {
if (fw_has_api(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) &&
vif->type != NL80211_IFTYPE_P2P_DEVICE &&
fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN))
return IWL_SCAN_TYPE_FRAGMENTED;
params->suspend_time = 105;
/*
* If there is more than one active interface make
* passive scan more fragmented.
*/
frag_passive_dwell = 40;
params->max_out_time = frag_passive_dwell;
} else {
params->suspend_time = 120;
params->max_out_time = 120;
}
}
if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
return IWL_SCAN_TYPE_MILD;
if (frag_passive_dwell &&
fw_has_api(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
/*
* P2P device scan should not be fragmented to avoid negative
* impact on P2P device discovery. Configure max_out_time to be
* equal to dwell time on passive channel.
*/
if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
params->max_out_time = 120;
} else {
params->passive_fragmented = true;
}
}
if ((params->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
(params->max_out_time > 200))
params->max_out_time = 200;
not_bound:
if (params->passive_fragmented)
params->fragmented_dwell = frag_passive_dwell;
/*
* use only basic dwell time in scan command, regardless of the band or
* the number of the probes. FW will calculate the actual dwell time.
*/
params->passive_dwell = 110;
params->active_dwell = 10;
IWL_DEBUG_SCAN(mvm,
"scan parameters: max_out_time %d, suspend_time %d, passive_fragmented %d\n",
params->max_out_time, params->suspend_time,
params->passive_fragmented);
return IWL_SCAN_TYPE_WILD;
}
static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
@ -699,12 +709,11 @@ static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
struct iwl_scan_req_lmac *cmd,
struct iwl_mvm_scan_params *params)
{
cmd->active_dwell = params->active_dwell;
cmd->passive_dwell = params->passive_dwell;
if (params->passive_fragmented)
cmd->fragmented_dwell = params->fragmented_dwell;
cmd->max_out_time = cpu_to_le32(params->max_out_time);
cmd->suspend_time = cpu_to_le32(params->suspend_time);
cmd->active_dwell = scan_timing[params->type].dwell_active;
cmd->passive_dwell = scan_timing[params->type].dwell_passive;
cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
cmd->scan_prio = iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
}
@ -755,7 +764,7 @@ static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
if (params->passive_fragmented)
if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
if (iwl_mvm_rrm_scan_needed(mvm))
@ -958,12 +967,11 @@ static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
struct iwl_scan_req_umac *cmd,
struct iwl_mvm_scan_params *params)
{
cmd->active_dwell = params->active_dwell;
cmd->passive_dwell = params->passive_dwell;
if (params->passive_fragmented)
cmd->fragmented_dwell = params->fragmented_dwell;
cmd->max_out_time = cpu_to_le32(params->max_out_time);
cmd->suspend_time = cpu_to_le32(params->suspend_time);
cmd->active_dwell = scan_timing[params->type].dwell_active;
cmd->passive_dwell = scan_timing[params->type].dwell_passive;
cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
cmd->scan_priority =
iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
@ -1003,7 +1011,7 @@ static u32 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
if (params->passive_fragmented)
if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
if (iwl_mvm_rrm_scan_needed(mvm))
@ -1177,7 +1185,7 @@ int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
params.schedule[1].iterations = 0;
params.schedule[1].full_scan_mul = 0;
iwl_mvm_scan_calc_dwell(mvm, vif, &params);
params.type = iwl_mvm_get_scan_type(mvm, vif, &params);
iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
@ -1259,6 +1267,7 @@ int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
params.schedule[0].full_scan_mul = 1;
params.schedule[1].iterations = 0xff;
params.schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER;
params.type = iwl_mvm_get_scan_type(mvm, vif, &params);
if (req->interval > U16_MAX) {
IWL_DEBUG_SCAN(mvm,
@ -1281,8 +1290,6 @@ int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
params.delay = req->delay;
}
iwl_mvm_scan_calc_dwell(mvm, vif, &params);
ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
if (ret)
return ret;