[net-next-2.6 PATCH 1/3] e1000e: register pm_qos request on hardware activation

[net-next-2.6 PATCH 1/3] e1000e: register pm_qos request on hardware activation

[Jeff Kirsher]

From: Florian Mickler <florian@mickler.org>

The pm_qos_add_request call has to register the pm_qos request with the pm_qos
susbsystem before first use of the pm_qos request via
pm_qos_update_request.

As pm_qos changed to use plists there is no benefit in registering and
unregistering the pm_qos request on ifup/ifdown and thus we move the
registering into e1000_open and the unregistering in e1000_close.

This fixes the following warning:

[    1.786060] WARNING: at kernel/pm_qos_params.c:264
pm_qos_update_request+0x28/0x54()
[    1.786088] Hardware name: Latitude E6500
[    1.787045] pm_qos_update_request() called for unknown object
[    1.787966] Modules linked in:
[    1.788940] Pid: 1, comm: swapper Not tainted 2.6.35-rc5-mmotm0719 #1
[    1.790035] Call Trace:
[    1.791121]  [<ffffffff81037335>] warn_slowpath_common+0x80/0x98
[    1.792205]  [<ffffffff810373e1>] warn_slowpath_fmt+0x41/0x43
[    1.793279]  [<ffffffff81057c14>] pm_qos_update_request+0x28/0x54
[    1.794347]  [<ffffffff8134889e>] e1000_configure+0x421/0x459
[    1.795393]  [<ffffffff8134afbd>] e1000_open+0xbd/0x37c
[    1.796436]  [<ffffffff8105743a>] ? raw_notifier_call_chain+0xf/0x11
[    1.797491]  [<ffffffff8145f948>] __dev_open+0xae/0xe2
[    1.798547]  [<ffffffff8145f997>] dev_open+0x1b/0x49
[    1.799612]  [<ffffffff8146e36e>] netpoll_setup+0x84/0x259
[    1.800685]  [<ffffffff81b5037c>] init_netconsole+0xbc/0x21f
[    1.801744]  [<ffffffff81b5026c>] ? sir_wq_init+0x0/0x35
[    1.802793]  [<ffffffff81b502c0>] ? init_netconsole+0x0/0x21f
[    1.803845]  [<ffffffff810002ff>] do_one_initcall+0x7a/0x12f
[    1.804885]  [<ffffffff81b2ccae>] kernel_init+0x138/0x1c2
[    1.805915]  [<ffffffff81003554>] kernel_thread_helper+0x4/0x10
[    1.806937]  [<ffffffff81590e00>] ? restore_args+0x0/0x30
[    1.807955]  [<ffffffff81b2cb76>] ? kernel_init+0x0/0x1c2
[    1.808958]  [<ffffffff81003550>] ? kernel_thread_helper+0x0/0x10
[    1.809958] ---[ end trace 84b562a00a60539e ]---

Signed-off-by: Florian Mickler <florian@mickler.org>
Tested-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/e1000e/netdev.c |   23 +++++++++++------------
 1 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index afd0129..464c9a2 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -3218,12 +3218,6 @@ int e1000e_up(struct e1000_adapter *adapter)
 {
 	struct e1000_hw *hw = &adapter->hw;
 
-	/* DMA latency requirement to workaround early-receive/jumbo issue */
-	if (adapter->flags & FLAG_HAS_ERT)
-		adapter->netdev->pm_qos_req =
-			pm_qos_add_request(PM_QOS_CPU_DMA_LATENCY,
-				       PM_QOS_DEFAULT_VALUE);
-
 	/* hardware has been reset, we need to reload some things */
 	e1000_configure(adapter);
 
@@ -3287,12 +3281,6 @@ void e1000e_down(struct e1000_adapter *adapter)
 	e1000_clean_tx_ring(adapter);
 	e1000_clean_rx_ring(adapter);
 
-	if (adapter->flags & FLAG_HAS_ERT) {
-		pm_qos_remove_request(
-			      adapter->netdev->pm_qos_req);
-		adapter->netdev->pm_qos_req = NULL;
-	}
-
 	/*
 	 * TODO: for power management, we could drop the link and
 	 * pci_disable_device here.
@@ -3527,6 +3515,12 @@ static int e1000_open(struct net_device *netdev)
 	     E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
 		e1000_update_mng_vlan(adapter);
 
+	/* DMA latency requirement to workaround early-receive/jumbo issue */
+	if (adapter->flags & FLAG_HAS_ERT)
+		adapter->netdev->pm_qos_req =
+		                    pm_qos_add_request(PM_QOS_CPU_DMA_LATENCY,
+		                                       PM_QOS_DEFAULT_VALUE);
+
 	/*
 	 * before we allocate an interrupt, we must be ready to handle it.
 	 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
@@ -3631,6 +3625,11 @@ static int e1000_close(struct net_device *netdev)
 	if (adapter->flags & FLAG_HAS_AMT)
 		e1000_release_hw_control(adapter);
 
+	if (adapter->flags & FLAG_HAS_ERT) {
+		pm_qos_remove_request(adapter->netdev->pm_qos_req);
+		adapter->netdev->pm_qos_req = NULL;
+	}
+
 	pm_runtime_put_sync(&pdev->dev);
 
 	return 0;

[net-next-2.6 PATCH 2/3] e1000e: Fix irq_synchronize in MSI-X case

[Jeff Kirsher]

Based on original patch/work from Jean Delvare <jdelvare@suse.de>
Synchronize all IRQs when in MSI-X IRQ mode.

Jean's original patch hard coded the sync with the 3 possible vectors,
this patch incorporates more flexibility for the future and aligns
with how igb stores the number of vectors into the adapter structure.

CC: Jean Delvare <jdelvare@suse.de>
Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Acked-by: Bruce Allan <bruce.w.allan@intel.com>
---

 drivers/net/e1000e/e1000.h  |    1 +
 drivers/net/e1000e/netdev.c |   26 ++++++++++++++++++--------
 2 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h
index 9ee133f..f9a31c8 100644
--- a/drivers/net/e1000e/e1000.h
+++ b/drivers/net/e1000e/e1000.h
@@ -348,6 +348,7 @@ struct e1000_adapter {
 	u32 test_icr;
 
 	u32 msg_enable;
+	unsigned int num_vectors;
 	struct msix_entry *msix_entries;
 	int int_mode;
 	u32 eiac_mask;
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index 464c9a2..9e9164a 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -1785,25 +1785,25 @@ void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
 {
 	int err;
-	int numvecs, i;
-
+	int i;
 
 	switch (adapter->int_mode) {
 	case E1000E_INT_MODE_MSIX:
 		if (adapter->flags & FLAG_HAS_MSIX) {
-			numvecs = 3; /* RxQ0, TxQ0 and other */
-			adapter->msix_entries = kcalloc(numvecs,
+			adapter->num_vectors = 3; /* RxQ0, TxQ0 and other */
+			adapter->msix_entries = kcalloc(adapter->num_vectors,
 						      sizeof(struct msix_entry),
 						      GFP_KERNEL);
 			if (adapter->msix_entries) {
-				for (i = 0; i < numvecs; i++)
+				for (i = 0; i < adapter->num_vectors; i++)
 					adapter->msix_entries[i].entry = i;
 
 				err = pci_enable_msix(adapter->pdev,
 						      adapter->msix_entries,
-						      numvecs);
-				if (err == 0)
+						      adapter->num_vectors);
+				if (err == 0) {
 					return;
+				}
 			}
 			/* MSI-X failed, so fall through and try MSI */
 			e_err("Failed to initialize MSI-X interrupts.  "
@@ -1825,6 +1825,9 @@ void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
 		/* Don't do anything; this is the system default */
 		break;
 	}
+
+	/* store the number of vectors being used */
+	adapter->num_vectors = 1;
 }
 
 /**
@@ -1946,7 +1949,14 @@ static void e1000_irq_disable(struct e1000_adapter *adapter)
 	if (adapter->msix_entries)
 		ew32(EIAC_82574, 0);
 	e1e_flush();
-	synchronize_irq(adapter->pdev->irq);
+
+	if (adapter->msix_entries) {
+		int i;
+		for (i = 0; i < adapter->num_vectors; i++)
+			synchronize_irq(adapter->msix_entries[i].vector);
+	} else {
+		synchronize_irq(adapter->pdev->irq);
+	}
 }
 
 /**

[net-next-2.6 PATCH 3/3] e1000e: update to workaround for jumbo frames on 82577

[Jeff Kirsher]

From: Bruce Allan <bruce.w.allan@intel.com>

For OEM systems with this part that also has Spread Spectrum Clocking (SSC)
enabled in the BIOS, there is an Rx performance issue with 4K jumbo frames.
Leaving the defaults in PHY page 770 register 26 resolves the issue, and
does not negatively impact jumbo frames on systems with SSC disabled.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/e1000e/netdev.c |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)

diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index 9e9164a..cc97b58 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -2727,11 +2727,6 @@ static void e1000_setup_rctl(struct e1000_adapter *adapter)
 	if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) {
 		u16 phy_data;
 
-		e1e_rphy(hw, PHY_REG(770, 26), &phy_data);
-		phy_data &= 0xfff8;
-		phy_data |= (1 << 2);
-		e1e_wphy(hw, PHY_REG(770, 26), phy_data);
-
 		e1e_rphy(hw, 22, &phy_data);
 		phy_data &= 0x0fff;
 		phy_data |= (1 << 14);

Re: [net-next-2.6 PATCH 3/3] e1000e: update to workaround for jumbo frames on 82577

[Jeff Kirsher]

On Mon, Aug 2, 2010 at 17:27, Jeff Kirsher <jeffrey.t.kirsher@intel.com> wrote:
> From: Bruce Allan <bruce.w.allan@intel.com>
>
> For OEM systems with this part that also has Spread Spectrum Clocking (SSC)
> enabled in the BIOS, there is an Rx performance issue with 4K jumbo frames.
> Leaving the defaults in PHY page 770 register 26 resolves the issue, and
> does not negatively impact jumbo frames on systems with SSC disabled.
>
> Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
> ---
>
>  drivers/net/e1000e/netdev.c |    5 -----
>  1 files changed, 0 insertions(+), 5 deletions(-)
>

Please disregard this patch, it was sent out accidentally (my bad).
During testing issues were found and changes need to be made to this
patch.

-- 
Cheers,
Jeff

Re: [net-next-2.6 PATCH 1/3] e1000e: register pm_qos request on hardware activation

[David Miller]

From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Mon, 02 Aug 2010 17:27:00 -0700

> From: Florian Mickler <florian@mickler.org>
> 
> The pm_qos_add_request call has to register the pm_qos request with the pm_qos
> susbsystem before first use of the pm_qos request via
> pm_qos_update_request.
> 
> As pm_qos changed to use plists there is no benefit in registering and
> unregistering the pm_qos request on ifup/ifdown and thus we move the
> registering into e1000_open and the unregistering in e1000_close.
> 
> This fixes the following warning:
 ...
> Signed-off-by: Florian Mickler <florian@mickler.org>
> Tested-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
> Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Applied.

Re: [net-next-2.6 PATCH 2/3] e1000e: Fix irq_synchronize in MSI-X case

[David Miller]

From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Mon, 02 Aug 2010 17:27:23 -0700

> Based on original patch/work from Jean Delvare <jdelvare@suse.de>
> Synchronize all IRQs when in MSI-X IRQ mode.
> 
> Jean's original patch hard coded the sync with the 3 possible vectors,
> this patch incorporates more flexibility for the future and aligns
> with how igb stores the number of vectors into the adapter structure.
> 
> CC: Jean Delvare <jdelvare@suse.de>
> Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
> Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
> Acked-by: Bruce Allan <bruce.w.allan@intel.com>

Applied.

Re: [net-next-2.6 PATCH 3/3] e1000e: update to workaround for jumbo frames on 82577

[David Miller]

From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Mon, 2 Aug 2010 17:36:56 -0700

> On Mon, Aug 2, 2010 at 17:27, Jeff Kirsher <jeffrey.t.kirsher@intel.com> wrote:
>> From: Bruce Allan <bruce.w.allan@intel.com>
>>
>> For OEM systems with this part that also has Spread Spectrum Clocking (SSC)
>> enabled in the BIOS, there is an Rx performance issue with 4K jumbo frames.
>> Leaving the defaults in PHY page 770 register 26 resolves the issue, and
>> does not negatively impact jumbo frames on systems with SSC disabled.
>>
>> Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
>> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
>> ---
>>
>>  drivers/net/e1000e/netdev.c |    5 -----
>>  1 files changed, 0 insertions(+), 5 deletions(-)
>>
> 
> Please disregard this patch, it was sent out accidentally (my bad).
> During testing issues were found and changes need to be made to this
> patch.

Ok.