From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sucheta ROY <sucheta.roy@st.com>
Date: Thu, 19 May 2011 20:02:50 +0800
Subject: [ath9k-devel] AR9380 MSI
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To: ath9k-devel@lists.ath9k.org

Hi,

Thanks a lot for your efforts. It's great news for me.
After you enable "pci_enable_msi" have you checked cat /proc/interrupts? What does it show? And do you confirm that the WiFi card works successfully that is able to scan WiFi networks after MSI is enabled?

Also what all modifications you have done in the driver? Which version of Linux kernel your are using?

Thanks and Regards,
Sucheta

-----Original Message-----
From: Falk-Moritz Schaefer [mailto:falk.schaefer at tu-dortmund.de] 
Sent: Thursday, May 19, 2011 4:36 PM
To: ath9k-devel at venema.h4ckr.net
Cc: Sucheta ROY
Subject: RE: [ath9k-devel] AR9380 MSI

Hi,

I have an AR9382 card (SparkLAN WPEA-121N, 168c:3116 ) in an Lenovo R500
laptop. "pci_enable_msi" returns zero, and the card seems to work fine.
There are lspci outputs below. Hope that helps.

lspci output without "pci_enable_msi":
03:00.0 Network controller: Atheros Communications Inc. Device 0030 (rev 01)
	Subsystem: Atheros Communications Inc. Device 3116
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 17
	Region 0: Memory at f8000000 (64-bit, non-prefetchable) [size=128K]
	[virtual] Expansion ROM@7c400000 [disabled] [size=64K]
	Capabilities: [40] Power Management version 3
		Flags: PMEClk- DSI- D1+ D2- AuxCurrent=375mA
PME(D0+,D1+,D2-,D3hot+,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+
Queue=0/2 Enable-
		Address: 0000000000000000  Data: 0000
		Masking: 00000000  Pending: 00000000
	Capabilities: [70] Express (v2) Endpoint, MSI 00
		DevCap:	MaxPayload 128 bytes, PhantFunc 0, Latency L0s
unlimited, L1 <64us
			ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal-
Unsupported-
			RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop-
			MaxPayload 128 bytes, MaxReadReq 512 bytes
		DevSta:	CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr-
TransPend-
		LnkCap:	Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1,
Latency L0 <4us, L1 <64us
			ClockPM- Suprise- LLActRep- BwNot-
		LnkCtl:	ASPM L0s L1 Enabled; RCB 64 bytes Disabled- Retrain-
CommClk+
			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
		LnkSta:	Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+
DLActive- BWMgmt- ABWMgmt-
	Capabilities: [100] Advanced Error Reporting <?>
	Capabilities: [140] Virtual Channel <?>
	Capabilities: [300] Device Serial Number 00-00-00-00-00-00-00-00
	Kernel driver in use: ath9k
	Kernel modules: ath9k

Lspci with "pci_enable_msi":
03:00.0 Network controller: Atheros Communications Inc. Device 0030 (rev 01)
	Subsystem: Atheros Communications Inc. Device 3116
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR+ FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 33
	Region 0: Memory at f8000000 (64-bit, non-prefetchable) [size=128K]
	[virtual] Expansion ROM@7c400000 [disabled] [size=64K]
	Capabilities: [40] Power Management version 3
		Flags: PMEClk- DSI- D1+ D2- AuxCurrent=375mA
PME(D0+,D1+,D2-,D3hot+,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+
Queue=0/2 Enable+
		Address: 00000000fee0300c  Data: 41d1
		Masking: 0000000e  Pending: 00000000
	Capabilities: [70] Express (v2) Endpoint, MSI 00
		DevCap:	MaxPayload 128 bytes, PhantFunc 0, Latency L0s
unlimited, L1 <64us
			ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal-
Unsupported-
			RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop-
			MaxPayload 128 bytes, MaxReadReq 512 bytes
		DevSta:	CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr-
TransPend-
		LnkCap:	Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1,
Latency L0 <4us, L1 <64us
			ClockPM- Suprise- LLActRep- BwNot-
		LnkCtl:	ASPM L0s L1 Enabled; RCB 64 bytes Disabled- Retrain-
CommClk+
			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
		LnkSta:	Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+
DLActive- BWMgmt- ABWMgmt-
	Capabilities: [100] Advanced Error Reporting <?>
	Capabilities: [140] Virtual Channel <?>
	Capabilities: [300] Device Serial Number 00-00-00-00-00-00-00-00
	Kernel driver in use: ath9k
	Kernel modules: ath9k


> -----Original Message-----
> From: ath9k-devel-bounces at venema.h4ckr.net [mailto:ath9k-devel-
> bounces at venema.h4ckr.net] On Behalf Of Sucheta ROY
> Sent: Thursday, May 19, 2011 10:36 AM
> To: Alex Hacker; ath9k-devel at venema.h4ckr.net
> Subject: Re: [ath9k-devel] AR9380 MSI
> 
> Hi,
> 
> I believe you have AR9380 card installed in your PC?
> 
> You have to build your kernel with CONFIG_PCI_MSI option enabled.
> "CONFIG_PCI_MSI" Depends on: PCI [=y] && ARCH_SUPPORTS_MSI [=y].
> Also you have to include int pci_enable_msi(struct pci_dev *dev)  function
in
> pci.c file of ath9k. This function should be called before the driver
calls
> request_irq().With a successful call the device will be switched from pin-
> based legacy interrupt mode to MSI mode.  The dev->irq number will be
> changed to a new number which represents the message signaled interrupt.
> 
> Also can you please let me know PCI Vendor Id/Device Id of this card ie
> AR9380?
> 
> Thanks in advance for your support.
> 
> Regards,
> Sucheta
> -----Original Message-----
> From: ath9k-devel-bounces at lists.ath9k.org [mailto:ath9k-devel-
> bounces at lists.ath9k.org] On Behalf Of Alex Hacker
> Sent: Thursday, May 19, 2011 11:32 AM
> To: ath9k-devel at venema.h4ckr.net
> Subject: Re: [ath9k-devel] AR9285 MSI
> 
> I have one currently installed on my PC, but do not have much time to
> experimenting with MSI. If you tell me exactly what I should do to enable
it
> I'll report the results.
> 
> On Thu, May 19, 2011 at 12:33:29PM +0800, Sucheta ROY wrote:
> > Hi,
> >
> > I would like to know on what basis it is said AR9380 should work with
MSI.I
> am aware that ath9K Linux driver does not support MSI by default. As you
> are suggesting that certain changes need to be incorporated in the driver.
> What all suggestion I received in previous mail I incorporated but could
not
> make AR9285 work, although it exposes MSI capability structure and cat
> /proc/interrupts show pcie_msi interrupt in the table. So I am afraid
whether
> the same would happen for AR9380!
> >
> > If anybody is having that card, and can make a quick check by enabling
> MSI,that will be of great help. I don't have the card at this moment. If
it is
> ensured that the card works with MSI I will plan to buy one.
> >
> > Thanks and Regards,
> > Sucheta
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