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iwlagn: allow application own the uCode operation

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Since we open the door to allow application control the device behavior through
testmode, add command to allow application request the ownership of the uCode

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Wey-Yi Guy 2011-07-08 08:46:26 -07:00 committed by John W. Linville
parent c7c1115b8f
commit e98a1939a2
3 changed files with 62 additions and 2 deletions
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8
drivers/net/wireless/iwlwifi/iwl-dev.h
View File

@ -1263,6 +1263,10 @@ struct iwl_trans {
const struct iwl_trans_ops *ops;
};
/* uCode ownership */
#define IWL_OWNERSHIP_DRIVER 0
#define IWL_OWNERSHIP_TM 1
struct iwl_priv {
/* ieee device used by generic ieee processing code */
@ -1351,6 +1355,10 @@ struct iwl_priv {
int fw_index; /* firmware we're trying to load */
u32 ucode_ver; /* version of ucode, copy of
iwl_ucode.ver */
/* uCode owner: default: IWL_OWNERSHIP_DRIVER */
u8 ucode_owner;
struct fw_img ucode_rt;
struct fw_img ucode_init;

42
drivers/net/wireless/iwlwifi/iwl-sv-open.c
View File

@ -105,6 +105,7 @@ struct nla_policy iwl_testmode_gnl_msg_policy[IWL_TM_ATTR_MAX] = {
[IWL_TM_ATTR_FIXRATE] = { .type = NLA_U32, },
[IWL_TM_ATTR_UCODE_OWNER] = { .type = NLA_U8, },
};
/*
@ -587,6 +588,42 @@ static int iwl_testmode_trace_dump(struct ieee80211_hw *hw, struct nlattr **tb,
return -ENOBUFS;
}
/*
* This function handles the user application switch ucode ownership.
*
* It retrieves the mandatory fields IWL_TM_ATTR_UCODE_OWNER and
* decide who the current owner of the uCode
*
* If the current owner is OWNERSHIP_TM, then the only host command
* can deliver to uCode is from testmode, all the other host commands
* will dropped.
*
* default driver is the owner of uCode in normal operational mode
*
* @hw: ieee80211_hw object that represents the device
* @tb: gnl message fields from the user space
*/
static int iwl_testmode_ownership(struct ieee80211_hw *hw, struct nlattr **tb)
{
struct iwl_priv *priv = hw->priv;
u8 owner;
if (!tb[IWL_TM_ATTR_UCODE_OWNER]) {
IWL_DEBUG_INFO(priv, "Error finding ucode owner\n");
return -ENOMSG;
}
owner = nla_get_u8(tb[IWL_TM_ATTR_UCODE_OWNER]);
if ((owner == IWL_OWNERSHIP_DRIVER) || (owner == IWL_OWNERSHIP_TM))
priv->ucode_owner = owner;
else {
IWL_DEBUG_INFO(priv, "Invalid owner\n");
return -EINVAL;
}
return 0;
}
/* The testmode gnl message handler that takes the gnl message from the
* user space and parses it per the policy iwl_testmode_gnl_msg_policy, then
* invoke the corresponding handlers.
@ -656,6 +693,11 @@ int iwl_testmode_cmd(struct ieee80211_hw *hw, void *data, int len)
result = iwl_testmode_trace(hw, tb);
break;
case IWL_TM_CMD_APP2DEV_OWNERSHIP:
IWL_DEBUG_INFO(priv, "testmode change uCode ownership\n");
result = iwl_testmode_ownership(hw, tb);
break;
default:
IWL_DEBUG_INFO(priv, "Unknown testmode command\n");
result = -ENOSYS;

14
drivers/net/wireless/iwlwifi/iwl-testmode.h
View File

@ -103,6 +103,10 @@
* @IWL_TM_CMD_DEV2APP_EEPROM_RSP:
* commands from kernel space to carry the eeprom response
* to user application
* @IWL_TM_CMD_APP2DEV_OWNERSHIP:
* commands from user application to own change the ownership of the uCode
* if application has the ownership, the only host command from
* testmode will deliver to uCode. Default owner is driver
*/
enum iwl_tm_cmd_t {
IWL_TM_CMD_APP2DEV_UCODE = 1,
@ -121,7 +125,8 @@ enum iwl_tm_cmd_t {
IWL_TM_CMD_DEV2APP_SYNC_RSP = 14,
IWL_TM_CMD_DEV2APP_UCODE_RX_PKT = 15,
IWL_TM_CMD_DEV2APP_EEPROM_RSP = 16,
IWL_TM_CMD_MAX = 17,
IWL_TM_CMD_APP2DEV_OWNERSHIP = 17,
IWL_TM_CMD_MAX = 18,
};
/*
@ -187,6 +192,10 @@ enum iwl_tm_cmd_t {
* The mandatory fields are:
* IWL_TM_ATTR_FIXRATE for the fixed rate
*
* @IWL_TM_ATTR_UCODE_OWNER:
* When IWL_TM_ATTR_COMMAND is IWL_TM_CMD_APP2DEV_OWNERSHIP,
* The mandatory fields are:
* IWL_TM_ATTR_UCODE_OWNER for the new owner
*/
enum iwl_tm_attr_t {
IWL_TM_ATTR_NOT_APPLICABLE = 0,
@ -203,7 +212,8 @@ enum iwl_tm_attr_t {
IWL_TM_ATTR_TRACE_SIZE = 11,
IWL_TM_ATTR_TRACE_DUMP = 12,
IWL_TM_ATTR_FIXRATE = 13,
IWL_TM_ATTR_MAX = 14,
IWL_TM_ATTR_UCODE_OWNER = 14,
IWL_TM_ATTR_MAX = 15,
};
/* uCode trace buffer */