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iwlwifi: check the SCD conf from ALIVE response

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The ALIVE response of new fw inclues the base address of
the SCD in SRAM. Until we read it from a prph register,
which was set by the fw. Since the fw might well stop
updating the prph register, add a WARN when there is an
inconsitency between the ALIVE response and the register
to catch any change in the behavior.

Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Emmanuel Grumbach 2012-10-25 23:08:27 +02:00 • committed by Johannes Berg
commit adca1235cc
3 changed files with 13 additions and 8 deletions
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2
drivers/net/wireless/iwlwifi/dvm/ucode.c
View file

@ -254,7 +254,7 @@ static int iwl_alive_notify(struct iwl_priv *priv)
int ret;
int i;
iwl_trans_fw_alive(priv->trans);
iwl_trans_fw_alive(priv->trans, 0);
if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PAN &&
priv->eeprom_data->sku & EEPROM_SKU_CAP_IPAN_ENABLE) {

9
drivers/net/wireless/iwlwifi/iwl-trans.h
View file

@ -355,7 +355,8 @@ struct iwl_trans;
* @start_fw: allocates and inits all the resources for the transport
* layer. Also kick a fw image.
* May sleep
* @fw_alive: called when the fw sends alive notification
* @fw_alive: called when the fw sends alive notification. If the fw provides
* the SCD base address in SRAM, then provide it here, or 0 otherwise.
* May sleep
* @stop_device:stops the whole device (embedded CPU put to reset)
* May sleep
@ -394,7 +395,7 @@ struct iwl_trans_ops {
int (*start_hw)(struct iwl_trans *iwl_trans);
void (*stop_hw)(struct iwl_trans *iwl_trans, bool op_mode_leaving);
int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw);
void (*fw_alive)(struct iwl_trans *trans);
void (*fw_alive)(struct iwl_trans *trans, u32 scd_addr);
void (*stop_device)(struct iwl_trans *trans);
void (*wowlan_suspend)(struct iwl_trans *trans);
@ -514,13 +515,13 @@ static inline void iwl_trans_stop_hw(struct iwl_trans *trans,
trans->state = IWL_TRANS_NO_FW;
}
static inline void iwl_trans_fw_alive(struct iwl_trans *trans)
static inline void iwl_trans_fw_alive(struct iwl_trans *trans, u32 scd_addr)
{
might_sleep();
trans->state = IWL_TRANS_FW_ALIVE;
trans->ops->fw_alive(trans);
trans->ops->fw_alive(trans, scd_addr);
}
static inline int iwl_trans_start_fw(struct iwl_trans *trans,

10
drivers/net/wireless/iwlwifi/pcie/trans.c
View file

@ -1079,7 +1079,7 @@ static void iwl_trans_txq_set_sched(struct iwl_trans *trans, u32 mask)
iwl_write_prph(trans, SCD_TXFACT, mask);
}
static void iwl_tx_start(struct iwl_trans *trans)
static void iwl_tx_start(struct iwl_trans *trans, u32 scd_base_addr)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
u32 a;
@ -1092,6 +1092,10 @@ static void iwl_tx_start(struct iwl_trans *trans)
trans_pcie->scd_base_addr =
iwl_read_prph(trans, SCD_SRAM_BASE_ADDR);
WARN_ON(scd_base_addr != 0 &&
scd_base_addr != trans_pcie->scd_base_addr);
a = trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_LOWER_BOUND;
/* reset conext data memory */
for (; a < trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_UPPER_BOUND;
@ -1137,10 +1141,10 @@ static void iwl_tx_start(struct iwl_trans *trans)
APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
}
static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans)
static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans, u32 scd_addr)
{
iwl_reset_ict(trans);
iwl_tx_start(trans);
iwl_tx_start(trans, scd_addr);
}
/**