diff options
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-hw.h | 7 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-core.c | 24 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-core.h | 14 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-dev.h | 5 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-pci.c | 52 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-power.c | 10 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-power.h | 2 |
7 files changed, 63 insertions, 51 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-hw.h b/drivers/net/wireless/iwlwifi/iwl-agn-hw.h index 7bd19f4..0e5b842 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-hw.h +++ b/drivers/net/wireless/iwlwifi/iwl-agn-hw.h @@ -81,13 +81,6 @@ /* RSSI to dBm */ #define IWLAGN_RSSI_OFFSET 44 -/* PCI registers */ -#define PCI_CFG_RETRY_TIMEOUT 0x041 - -/* PCI register values */ -#define PCI_CFG_LINK_CTRL_VAL_L0S_EN 0x01 -#define PCI_CFG_LINK_CTRL_VAL_L1_EN 0x02 - #define IWLAGN_DEFAULT_TX_RETRY 15 /* Limit range of txpower output target to be between these values */ diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c index 4268a3f..360df33 100644 --- a/drivers/net/wireless/iwlwifi/iwl-core.c +++ b/drivers/net/wireless/iwlwifi/iwl-core.c @@ -997,8 +997,6 @@ void iwl_apm_stop(struct iwl_priv *priv) int iwl_apm_init(struct iwl_priv *priv) { int ret = 0; - u16 lctl; - IWL_DEBUG_INFO(priv, "Init card's basic functions\n"); /* @@ -1027,27 +1025,7 @@ int iwl_apm_init(struct iwl_priv *priv) iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A); - /* - * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition. - * Check if BIOS (or OS) enabled L1-ASPM on this device. - * If so (likely), disable L0S, so device moves directly L0->L1; - * costs negligible amount of power savings. - * If not (unlikely), enable L0S, so there is at least some - * power savings, even without L1. - */ - lctl = iwl_pcie_link_ctl(priv); - if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) == - PCI_CFG_LINK_CTRL_VAL_L1_EN) { - /* L1-ASPM enabled; disable(!) L0S */ - iwl_set_bit(priv, CSR_GIO_REG, - CSR_GIO_REG_VAL_L0S_ENABLED); - IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n"); - } else { - /* L1-ASPM disabled; enable(!) L0S */ - iwl_clear_bit(priv, CSR_GIO_REG, - CSR_GIO_REG_VAL_L0S_ENABLED); - IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n"); - } + priv->bus.ops->apm_config(&priv->bus); /* Configure analog phase-lock-loop before activating to D0A */ if (priv->cfg->base_params->pll_cfg_val) diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h index 84032bb..a09361d 100644 --- a/drivers/net/wireless/iwlwifi/iwl-core.h +++ b/drivers/net/wireless/iwlwifi/iwl-core.h @@ -470,20 +470,6 @@ int iwl_send_cmd_pdu_async(struct iwl_priv *priv, u8 id, u16 len, int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd); - -/***************************************************** - * PCI * - *****************************************************/ - -static inline u16 iwl_pcie_link_ctl(struct iwl_priv *priv) -{ - int pos; - u16 pci_lnk_ctl; - pos = pci_find_capability(priv->pci_dev, PCI_CAP_ID_EXP); - pci_read_config_word(priv->pci_dev, pos + PCI_EXP_LNKCTL, &pci_lnk_ctl); - return pci_lnk_ctl; -} - void iwl_bg_watchdog(unsigned long data); u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval); __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base, diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h index 700e9f9..797d4f3 100644 --- a/drivers/net/wireless/iwlwifi/iwl-dev.h +++ b/drivers/net/wireless/iwlwifi/iwl-dev.h @@ -1193,6 +1193,9 @@ struct iwl_bus; /** * struct iwl_bus_ops - bus specific operations + + * @get_pm_support: must returns true if the bus can go to sleep + * @apm_config: will be called during the config of the APM configuration * @set_drv_data: set the priv pointer to the bus layer * @get_dev: returns the device struct * @write8: write a byte to register at offset ofs @@ -1200,6 +1203,8 @@ struct iwl_bus; * @wread32: read a dword at register at offset ofs */ struct iwl_bus_ops { + bool (*get_pm_support)(struct iwl_bus *bus); + void (*apm_config)(struct iwl_bus *bus); void (*set_drv_data)(struct iwl_bus *bus, void *priv); struct device *(*get_dev)(const struct iwl_bus *bus); void (*write8)(struct iwl_bus *bus, u32 ofs, u8 val); diff --git a/drivers/net/wireless/iwlwifi/iwl-pci.c b/drivers/net/wireless/iwlwifi/iwl-pci.c index 43de98e..d8c6ec8 100644 --- a/drivers/net/wireless/iwlwifi/iwl-pci.c +++ b/drivers/net/wireless/iwlwifi/iwl-pci.c @@ -66,6 +66,12 @@ #include "iwl-pci.h" #include "iwl-agn.h" #include "iwl-core.h" +#include "iwl-io.h" + +/* PCI registers */ +#define PCI_CFG_RETRY_TIMEOUT 0x041 +#define PCI_CFG_LINK_CTRL_VAL_L0S_EN 0x01 +#define PCI_CFG_LINK_CTRL_VAL_L1_EN 0x02 struct iwl_pci_bus { /* basic pci-network driver stuff */ @@ -81,6 +87,50 @@ struct iwl_pci_bus { #define IWL_BUS_GET_PCI_DEV(_iwl_bus) \ ((IWL_BUS_GET_PCI_BUS(_iwl_bus))->pci_dev) +static u16 iwl_pciexp_link_ctrl(struct iwl_bus *bus) +{ + int pos; + u16 pci_lnk_ctl; + struct pci_dev *pci_dev = IWL_BUS_GET_PCI_DEV(bus); + + pos = pci_find_capability(pci_dev, PCI_CAP_ID_EXP); + pci_read_config_word(pci_dev, pos + PCI_EXP_LNKCTL, &pci_lnk_ctl); + return pci_lnk_ctl; +} + +static bool iwl_pci_is_pm_supported(struct iwl_bus *bus) +{ + u16 lctl = iwl_pciexp_link_ctrl(bus); + + return !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN); +} + +static void iwl_pci_apm_config(struct iwl_bus *bus) +{ + /* + * HW bug W/A for instability in PCIe bus L0S->L1 transition. + * Check if BIOS (or OS) enabled L1-ASPM on this device. + * If so (likely), disable L0S, so device moves directly L0->L1; + * costs negligible amount of power savings. + * If not (unlikely), enable L0S, so there is at least some + * power savings, even without L1. + */ + u16 lctl = iwl_pciexp_link_ctrl(bus); + + if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) == + PCI_CFG_LINK_CTRL_VAL_L1_EN) { + /* L1-ASPM enabled; disable(!) L0S */ + iwl_set_bit(bus->priv, CSR_GIO_REG, + CSR_GIO_REG_VAL_L0S_ENABLED); + IWL_DEBUG_POWER(bus->priv, "L1 Enabled; Disabling L0S\n"); + } else { + /* L1-ASPM disabled; enable(!) L0S */ + iwl_clear_bit(bus->priv, CSR_GIO_REG, + CSR_GIO_REG_VAL_L0S_ENABLED); + IWL_DEBUG_POWER(bus->priv, "L1 Disabled; Enabling L0S\n"); + } +} + static void iwl_pci_set_drv_data(struct iwl_bus *bus, void *drv_priv) { pci_set_drvdata(IWL_BUS_GET_PCI_DEV(bus), drv_priv); @@ -108,6 +158,8 @@ static u32 iwl_pci_read32(struct iwl_bus *bus, u32 ofs) } static struct iwl_bus_ops pci_ops = { + .get_pm_support = iwl_pci_is_pm_supported, + .apm_config = iwl_pci_apm_config, .set_drv_data = iwl_pci_set_drv_data, .get_dev = iwl_pci_get_dev, .write8 = iwl_pci_write8, diff --git a/drivers/net/wireless/iwlwifi/iwl-power.c b/drivers/net/wireless/iwlwifi/iwl-power.c index a69b551..970c514 100644 --- a/drivers/net/wireless/iwlwifi/iwl-power.c +++ b/drivers/net/wireless/iwlwifi/iwl-power.c @@ -245,7 +245,7 @@ static void iwl_static_sleep_cmd(struct iwl_priv *priv, } } - if (priv->power_data.pci_pm) + if (priv->power_data.bus_pm) cmd->flags |= IWL_POWER_PCI_PM_MSK; else cmd->flags &= ~IWL_POWER_PCI_PM_MSK; @@ -260,7 +260,7 @@ static void iwl_power_sleep_cam_cmd(struct iwl_priv *priv, { memset(cmd, 0, sizeof(*cmd)); - if (priv->power_data.pci_pm) + if (priv->power_data.bus_pm) cmd->flags |= IWL_POWER_PCI_PM_MSK; IWL_DEBUG_POWER(priv, "Sleep command for CAM\n"); @@ -296,7 +296,7 @@ static void iwl_power_fill_sleep_cmd(struct iwl_priv *priv, cmd->flags = IWL_POWER_DRIVER_ALLOW_SLEEP_MSK | IWL_POWER_FAST_PD; /* no use seeing frames for others */ - if (priv->power_data.pci_pm) + if (priv->power_data.bus_pm) cmd->flags |= IWL_POWER_PCI_PM_MSK; if (priv->cfg->base_params->shadow_reg_enable) @@ -425,9 +425,7 @@ int iwl_power_update_mode(struct iwl_priv *priv, bool force) /* initialize to default */ void iwl_power_initialize(struct iwl_priv *priv) { - u16 lctl = iwl_pcie_link_ctl(priv); - - priv->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN); + priv->power_data.bus_pm = priv->bus.ops->get_pm_support(&priv->bus); priv->power_data.debug_sleep_level_override = -1; diff --git a/drivers/net/wireless/iwlwifi/iwl-power.h b/drivers/net/wireless/iwlwifi/iwl-power.h index 59635d7..5f7b720 100644 --- a/drivers/net/wireless/iwlwifi/iwl-power.h +++ b/drivers/net/wireless/iwlwifi/iwl-power.h @@ -43,7 +43,7 @@ struct iwl_power_mgr { struct iwl_powertable_cmd sleep_cmd; struct iwl_powertable_cmd sleep_cmd_next; int debug_sleep_level_override; - bool pci_pm; + bool bus_pm; }; int iwl_power_set_mode(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd, |
