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iwlwifi: add very first D0i3 support 

When the bus is in D0i3, we can't send regular commands to
the firmware. This means that we need to add a state to
remember what is our d0i3 state and make sure that only
d0i3 exit commands can be sent.
Add flags to CMD_ flags and transport status for this
purpose.

Commands with CMD_HIGH_PRIO set are queued at the head of
the command queue, behind other high priority commands.

Commands with CMD_SEND_IN_IDLE set can be sent while the
transport is idle (without taking rpm reference).

Commands with CMD_MAKE_TRANS_IDLE set indicate that command
completion should mark the transport as idle (and release
the bus).

Commands with CMD_WAKE_UP_TRANS set instruct the transport
to exit from idle when this command is completed.

The transport is marked as idle (STATUS_TRANS_IDLE) when
the FW enters D0i3 state. This bit is cleared when it
enters D0 state again.

Process only commands with CMD_SEND_IN_IDLE flag while the
transport is idle. Other enqueued commands will be
processed only later, right after exiting D0i3.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Arik Nemtsov 2013-10-02 16:58:09 +03:00 committed by Emmanuel Grumbach
parent b3370d47f0
commit 98ee778306
3 changed files with 30 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/net/wireless/iwlwifi/iwl-trans.h
View File

@ -193,12 +193,23 @@ static inline u32 iwl_rx_packet_payload_len(const struct iwl_rx_packet *pkt)
* @CMD_ASYNC: Return right away and don't wait for the response
* @CMD_WANT_SKB: valid only with CMD_SYNC. The caller needs the buffer of the
* response. The caller needs to call iwl_free_resp when done.
* @CMD_HIGH_PRIO: The command is high priority - it goes to the front of the
* command queue, but after other high priority commands. valid only
* with CMD_ASYNC.
* @CMD_SEND_IN_IDLE: The command should be sent even when the trans is idle.
* @CMD_MAKE_TRANS_IDLE: The command response should mark the trans as idle.
* @CMD_WAKE_UP_TRANS: The command response should wake up the trans
* (i.e. mark it as non-idle).
*/
enum CMD_MODE {
CMD_SYNC = 0,
CMD_ASYNC = BIT(0),
CMD_WANT_SKB = BIT(1),
CMD_SEND_IN_RFKILL = BIT(2),
CMD_HIGH_PRIO = BIT(3),
CMD_SEND_IN_IDLE = BIT(4),
CMD_MAKE_TRANS_IDLE = BIT(5),
CMD_WAKE_UP_TRANS = BIT(6),
};
#define DEF_CMD_PAYLOAD_SIZE 320
@ -335,6 +346,9 @@ enum iwl_d3_status {
* @STATUS_INT_ENABLED: interrupts are enabled
* @STATUS_RFKILL: the HW RFkill switch is in KILL position
* @STATUS_FW_ERROR: the fw is in error state
* @STATUS_TRANS_GOING_IDLE: shutting down the trans, only special commands
* are sent
* @STATUS_TRANS_IDLE: the trans is idle - general commands are not to be sent
*/
enum iwl_trans_status {
STATUS_SYNC_HCMD_ACTIVE,
@ -343,6 +357,8 @@ enum iwl_trans_status {
STATUS_INT_ENABLED,
STATUS_RFKILL,
STATUS_FW_ERROR,
STATUS_TRANS_GOING_IDLE,
STATUS_TRANS_IDLE,
};
/**

1
drivers/net/wireless/iwlwifi/mvm/fw-api.h
View File

@ -199,6 +199,7 @@ enum {
PROT_OFFLOAD_CONFIG_CMD = 0xd4,
OFFLOADS_QUERY_CMD = 0xd5,
REMOTE_WAKE_CONFIG_CMD = 0xd6,
D0I3_END_CMD = 0xed,
/* for WoWLAN in particular */
WOWLAN_PATTERNS = 0xe0,

15
drivers/net/wireless/iwlwifi/mvm/ops.c
View File

@ -291,6 +291,7 @@ static const char *iwl_mvm_cmd_strings[REPLY_MAX] = {
CMD(REDUCE_TX_POWER_CMD),
CMD(TX_ANT_CONFIGURATION_CMD),
CMD(D3_CONFIG_CMD),
CMD(D0I3_END_CMD),
CMD(PROT_OFFLOAD_CONFIG_CMD),
CMD(OFFLOADS_QUERY_CMD),
CMD(REMOTE_WAKE_CONFIG_CMD),
@ -815,17 +816,27 @@ static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
{
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
struct iwl_d3_manager_config d3_cfg_cmd = {
.min_sleep_time = cpu_to_le32(1000),
};
IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
return 0;
return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
flags | CMD_MAKE_TRANS_IDLE,
sizeof(d3_cfg_cmd), &d3_cfg_cmd);
}
static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
{
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
CMD_WAKE_UP_TRANS;
IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
return 0;
return iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
}
static const struct iwl_op_mode_ops iwl_mvm_ops = {