[PATCH 08/12] ath9k: Use standard #defines for PCIe Capability ASPM fields

[PATCH 08/12] ath9k: Use standard #defines for PCIe Capability ASPM fields

[Bjorn Helgaas]

Use the standard #defines for PCIe Capability ASPM fields.

Previously we used PCIE_LINK_STATE_L0S and PCIE_LINK_STATE_L1 directly, but
these are defined for the Linux ASPM interfaces, e.g.,
pci_disable_link_state(), and only coincidentally match the actual register
bits.  PCIE_LINK_STATE_CLKPM, also part of that interface, does not match
the register bit.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: "John W. Linville" <linville@tuxdriver.com>
CC: "Luis R. Rodriguez" <mcgrof@qca.qualcomm.com>
CC: Jouni Malinen <jouni@qca.qualcomm.com>
CC: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
CC: Senthil Balasubramanian <senthilb@qca.qualcomm.com>
CC: linux-wireless@vger.kernel.org
CC: ath9k-devel@lists.ath9k.org
---
 drivers/net/wireless/ath/ath9k/pci.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c
index f088f4b..71d8207 100644
--- a/drivers/net/wireless/ath/ath9k/pci.c
+++ b/drivers/net/wireless/ath/ath9k/pci.c
@@ -125,23 +125,23 @@ static void ath_pci_aspm_init(struct ath_common *common)
 
 	if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) &&
 	    (AR_SREV_9285(ah))) {
-		/* Bluetooth coexistance requires disabling ASPM. */
+		/* Bluetooth coexistence requires disabling ASPM. */
 		pcie_capability_clear_word(pdev, PCI_EXP_LNKCTL,
-			PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1);
+			PCI_EXP_LNKCTL_ASPM_L0S | PCI_EXP_LNKCTL_ASPM_L1);
 
 		/*
 		 * Both upstream and downstream PCIe components should
 		 * have the same ASPM settings.
 		 */
 		pcie_capability_clear_word(parent, PCI_EXP_LNKCTL,
-			PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1);
+			PCI_EXP_LNKCTL_ASPM_L0S | PCI_EXP_LNKCTL_ASPM_L1);
 
 		ath_info(common, "Disabling ASPM since BTCOEX is enabled\n");
 		return;
 	}
 
 	pcie_capability_read_word(parent, PCI_EXP_LNKCTL, &aspm);
-	if (aspm & (PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1)) {
+	if (aspm & (PCI_EXP_LNKCTL_ASPM_L0S | PCI_EXP_LNKCTL_ASPM_L1)) {
 		ah->aspm_enabled = true;
 		/* Initialize PCIe PM and SERDES registers. */
 		ath9k_hw_configpcipowersave(ah, false);

[PATCH 09/12] iwlegacy: collapse wrapper for pcie_capability_read_word()

[Bjorn Helgaas]

il_pcie_link_ctl() has only one call site and no longer provides any useful
abstraction, so collapse it into the caller.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: "John W. Linville" <linville@tuxdriver.com>
CC: Stanislaw Gruszka <sgruszka@redhat.com>
CC: linux-wireless@vger.kernel.org
---
 drivers/net/wireless/iwlegacy/common.c |    5 +++--
 drivers/net/wireless/iwlegacy/common.h |    8 --------
 2 files changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/net/wireless/iwlegacy/common.c b/drivers/net/wireless/iwlegacy/common.c
index 318ed3c..1811507 100644
--- a/drivers/net/wireless/iwlegacy/common.c
+++ b/drivers/net/wireless/iwlegacy/common.c
@@ -1183,8 +1183,9 @@ EXPORT_SYMBOL(il_power_update_mode);
 void
 il_power_initialize(struct il_priv *il)
 {
-	u16 lctl = il_pcie_link_ctl(il);
+	u16 lctl;
 
+	pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
 	il->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
 
 	il->power_data.debug_sleep_level_override = -1;
@@ -4233,7 +4234,7 @@ il_apm_init(struct il_priv *il)
 	 *    power savings, even without L1.
 	 */
 	if (il->cfg->set_l0s) {
-		lctl = il_pcie_link_ctl(il);
+		pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
 		if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
 		    PCI_CFG_LINK_CTRL_VAL_L1_EN) {
 			/* L1-ASPM enabled; disable(!) L0S  */
diff --git a/drivers/net/wireless/iwlegacy/common.h b/drivers/net/wireless/iwlegacy/common.h
index b4bb813..c9a5022 100644
--- a/drivers/net/wireless/iwlegacy/common.h
+++ b/drivers/net/wireless/iwlegacy/common.h
@@ -1829,14 +1829,6 @@ int il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd);
  * PCI						     *
  *****************************************************/
 
-static inline u16
-il_pcie_link_ctl(struct il_priv *il)
-{
-	u16 pci_lnk_ctl;
-	pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &pci_lnk_ctl);
-	return pci_lnk_ctl;
-}
-
 void il_bg_watchdog(unsigned long data);
 u32 il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval);
 __le32 il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,

[PATCH 10/12] iwlwifi: collapse wrapper for pcie_capability_read_word()

[Bjorn Helgaas]

iwl_pciexp_link_ctrl() has only one call site and no longer provides any
useful abstraction, so collapse it into the caller.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: "John W. Linville" <linville@tuxdriver.com>
CC: Johannes Berg <johannes.berg@intel.com>
CC: Wey-Yi Guy <wey-yi.w.guy@intel.com>
CC: Intel Linux Wireless <ilw@linux.intel.com>
CC: linux-wireless@vger.kernel.org
---
 drivers/net/wireless/iwlwifi/pcie/trans.c |   13 +++----------
 1 files changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c
index fe0fffd..5cd06b3 100644
--- a/drivers/net/wireless/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/iwlwifi/pcie/trans.c
@@ -673,18 +673,11 @@ static void iwl_set_pwr_vmain(struct iwl_trans *trans)
 #define PCI_CFG_LINK_CTRL_VAL_L0S_EN	0x01
 #define PCI_CFG_LINK_CTRL_VAL_L1_EN	0x02
 
-static u16 iwl_pciexp_link_ctrl(struct iwl_trans *trans)
+static void iwl_apm_config(struct iwl_trans *trans)
 {
 	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
-	u16 pci_lnk_ctl;
-
-	pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_LNKCTL,
-				  &pci_lnk_ctl);
-	return pci_lnk_ctl;
-}
+	u16 lctl;
 
-static void iwl_apm_config(struct iwl_trans *trans)
-{
 	/*
 	 * HW bug W/A for instability in PCIe bus L0S->L1 transition.
 	 * Check if BIOS (or OS) enabled L1-ASPM on this device.
@@ -693,8 +686,8 @@ static void iwl_apm_config(struct iwl_trans *trans)
 	 * If not (unlikely), enable L0S, so there is at least some
 	 *    power savings, even without L1.
 	 */
-	u16 lctl = iwl_pciexp_link_ctrl(trans);
 
+	pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_LNKCTL, &lctl);
 	if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
 				PCI_CFG_LINK_CTRL_VAL_L1_EN) {
 		/* L1-ASPM enabled; disable(!) L0S */

[PATCH 11/12] iwlegacy: Use standard #defines for PCIe Capability ASPM fields

[Bjorn Helgaas]

Use the standard #defines rather than creating local definitions for
PCIe Capability ASPM fields.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: "John W. Linville" <linville@tuxdriver.com>
CC: Stanislaw Gruszka <sgruszka@redhat.com>
CC: linux-wireless@vger.kernel.org
---
 drivers/net/wireless/iwlegacy/4965.h   |    4 ----
 drivers/net/wireless/iwlegacy/common.c |    5 ++---
 drivers/net/wireless/iwlegacy/common.h |    4 ----
 3 files changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/net/wireless/iwlegacy/4965.h b/drivers/net/wireless/iwlegacy/4965.h
index 2d092f3..1b15b0b 100644
--- a/drivers/net/wireless/iwlegacy/4965.h
+++ b/drivers/net/wireless/iwlegacy/4965.h
@@ -917,10 +917,6 @@ struct il4965_scd_bc_tbl {
 /* 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 IL4965_DEFAULT_TX_RETRY  15
 
 /* EEPROM */
diff --git a/drivers/net/wireless/iwlegacy/common.c b/drivers/net/wireless/iwlegacy/common.c
index 1811507..7e16d10 100644
--- a/drivers/net/wireless/iwlegacy/common.c
+++ b/drivers/net/wireless/iwlegacy/common.c
@@ -1186,7 +1186,7 @@ il_power_initialize(struct il_priv *il)
 	u16 lctl;
 
 	pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
-	il->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
+	il->power_data.pci_pm = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
 
 	il->power_data.debug_sleep_level_override = -1;
 
@@ -4235,8 +4235,7 @@ il_apm_init(struct il_priv *il)
 	 */
 	if (il->cfg->set_l0s) {
 		pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
-		if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
-		    PCI_CFG_LINK_CTRL_VAL_L1_EN) {
+		if (lctl & PCI_EXP_LNKCTL_ASPM_L1) {
 			/* L1-ASPM enabled; disable(!) L0S  */
 			il_set_bit(il, CSR_GIO_REG,
 				   CSR_GIO_REG_VAL_L0S_ENABLED);
diff --git a/drivers/net/wireless/iwlegacy/common.h b/drivers/net/wireless/iwlegacy/common.h
index c9a5022..e181f3b 100644
--- a/drivers/net/wireless/iwlegacy/common.h
+++ b/drivers/net/wireless/iwlegacy/common.h
@@ -2426,10 +2426,6 @@ struct il_tfd {
 /* 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
-
 struct il_rate_info {
 	u8 plcp;		/* uCode API:  RATE_6M_PLCP, etc. */
 	u8 plcp_siso;		/* uCode API:  RATE_SISO_6M_PLCP, etc. */

[PATCH 12/12] iwlwifi: Use standard #defines for PCIe Capability ASPM fields

[Bjorn Helgaas]

Use the standard #defines rather than creating local definitions for
PCIe Capability ASPM fields.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: "John W. Linville" <linville@tuxdriver.com>
CC: Johannes Berg <johannes.berg@intel.com>
CC: Wey-Yi Guy <wey-yi.w.guy@intel.com>
CC: Intel Linux Wireless <ilw@linux.intel.com>
CC: linux-wireless@vger.kernel.org
---
 drivers/net/wireless/iwlwifi/pcie/trans.c |    7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c
index 5cd06b3..1dfa6be 100644
--- a/drivers/net/wireless/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/iwlwifi/pcie/trans.c
@@ -670,8 +670,6 @@ static void iwl_set_pwr_vmain(struct iwl_trans *trans)
 
 /* 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
 
 static void iwl_apm_config(struct iwl_trans *trans)
 {
@@ -688,8 +686,7 @@ static void iwl_apm_config(struct iwl_trans *trans)
 	 */
 
 	pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_LNKCTL, &lctl);
-	if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
-				PCI_CFG_LINK_CTRL_VAL_L1_EN) {
+	if (lctl & PCI_EXP_LNKCTL_ASPM_L1) {
 		/* L1-ASPM enabled; disable(!) L0S */
 		iwl_set_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 		dev_printk(KERN_INFO, trans->dev,
@@ -700,7 +697,7 @@ static void iwl_apm_config(struct iwl_trans *trans)
 		dev_printk(KERN_INFO, trans->dev,
 			   "L1 Disabled; Enabling L0S\n");
 	}
-	trans->pm_support = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
+	trans->pm_support = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
 }
 
 /*

Re: [PATCH 12/12] iwlwifi: Use standard #defines for PCIe Capability ASPM fields

[Johannes Berg]

On Wed, 2012-12-05 at 13:58 -0700, Bjorn Helgaas wrote:
> Use the standard #defines rather than creating local definitions for
> PCIe Capability ASPM fields.

I'll pick up the iwlwifi ones if you want, or do you want to merge them
somewhere centrally instead?

johannes

Re: [PATCH 12/12] iwlwifi: Use standard #defines for PCIe Capability ASPM fields

[Bjorn Helgaas]

On Wed, Dec 5, 2012 at 2:04 PM, Johannes Berg <johannes@sipsolutions.net> wrote:
> On Wed, 2012-12-05 at 13:58 -0700, Bjorn Helgaas wrote:
>> Use the standard #defines rather than creating local definitions for
>> PCIe Capability ASPM fields.
>
> I'll pick up the iwlwifi ones if you want, or do you want to merge them
> somewhere centrally instead?

They do depend on a previous patch that adds the #defines to
include/uapi/linux/pci_regs.h
(http://marc.info/?l=linux-pci&m=135474107109010&w=2).

I think I'll merge at least the PCI core parts of this via my PCI tree
in the v3.8 merge window next week.  If it won't cause conflicts for
you, I could include the iwlwifi bits there, too.  If it does, at
least the #define will exist and you can merge it at your leisure.

Bjorn

Re: [PATCH 12/12] iwlwifi: Use standard #defines for PCIe Capability ASPM fields

[Johannes Berg]

On Wed, 2012-12-05 at 14:20 -0700, Bjorn Helgaas wrote:
> On Wed, Dec 5, 2012 at 2:04 PM, Johannes Berg <johannes@sipsolutions.net> wrote:
> > On Wed, 2012-12-05 at 13:58 -0700, Bjorn Helgaas wrote:
> >> Use the standard #defines rather than creating local definitions for
> >> PCIe Capability ASPM fields.
> >
> > I'll pick up the iwlwifi ones if you want, or do you want to merge them
> > somewhere centrally instead?
> 
> They do depend on a previous patch that adds the #defines to
> include/uapi/linux/pci_regs.h
> (http://marc.info/?l=linux-pci&m=135474107109010&w=2).
> 
> I think I'll merge at least the PCI core parts of this via my PCI tree
> in the v3.8 merge window next week.  If it won't cause conflicts for
> you, I could include the iwlwifi bits there, too.  If it does, at
> least the #define will exist and you can merge it at your leisure.

Ok, that's fine, feel free to include the iwlwifi bits.

Acked-by: Johannes Berg <johannes.berg@intel.com>

:)

johannes

Re: [PATCH 09/12] iwlegacy: collapse wrapper for pcie_capability_read_word()

[Stanislaw Gruszka]

On Wed, Dec 05, 2012 at 01:58:06PM -0700, Bjorn Helgaas wrote:
> il_pcie_link_ctl() has only one call site and no longer provides any useful
> abstraction, so collapse it into the caller.
> 
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
> CC: "John W. Linville" <linville@tuxdriver.com>
> CC: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Stanislaw Gruszka <sgruszka@redhat.com>

Re: [PATCH 11/12] iwlegacy: Use standard #defines for PCIe Capability ASPM fields

[Stanislaw Gruszka]

On Wed, Dec 05, 2012 at 01:58:16PM -0700, Bjorn Helgaas wrote:
> Use the standard #defines rather than creating local definitions for
> PCIe Capability ASPM fields.
> 
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
> CC: "John W. Linville" <linville@tuxdriver.com>
> CC: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Stanislaw Gruszka <sgruszka@redhat.com>