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From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
To: "Z.q. Hou" <zhiqiang.hou@nxp.com>
Cc: "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"bhelgaas@google.com" <bhelgaas@google.com>,
	"robh+dt@kernel.org" <robh+dt@kernel.org>,
	"mark.rutland@arm.com" <mark.rutland@arm.com>,
	"l.subrahmanya@mobiveil.co.in" <l.subrahmanya@mobiveil.co.in>,
	"shawnguo@kernel.org" <shawnguo@kernel.org>,
	Leo Li <leoyang.li@nxp.com>,
	"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
	"will.deacon@arm.com" <will.deacon@arm.com>,
	Mingkai Hu <mingkai.hu@nxp.com>,
	"M.h. Lian" <minghuan.lian@nxp.com>,
	Xiaowei Bao <xiaowei.bao@nxp.com>
Subject: Re: [PATCHv5 04/20] PCI: mobiveil: Remove the flag MSI_FLAG_MULTI_PCI_MSI
Date: Mon, 17 Jun 2019 10:33:37 +0100
Message-ID: <20190617093337.GD18020@e121166-lin.cambridge.arm.com> (raw)
In-Reply-To: <AM0PR04MB6738B93C7F1B5BE433753CF584E90@AM0PR04MB6738.eurprd04.prod.outlook.com>

On Sat, Jun 15, 2019 at 01:30:39AM +0000, Z.q. Hou wrote:
> Hi Lorenzo,
> 
> > -----Original Message-----
> > From: Lorenzo Pieralisi [mailto:lorenzo.pieralisi@arm.com]
> > Sent: 2019年6月12日 21:08
> > To: Z.q. Hou <zhiqiang.hou@nxp.com>
> > Cc: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> > devicetree@vger.kernel.org; linux-kernel@vger.kernel.org;
> > bhelgaas@google.com; robh+dt@kernel.org; mark.rutland@arm.com;
> > l.subrahmanya@mobiveil.co.in; shawnguo@kernel.org; Leo Li
> > <leoyang.li@nxp.com>; catalin.marinas@arm.com; will.deacon@arm.com;
> > Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian <minghuan.lian@nxp.com>;
> > Xiaowei Bao <xiaowei.bao@nxp.com>
> > Subject: Re: [PATCHv5 04/20] PCI: mobiveil: Remove the flag
> > MSI_FLAG_MULTI_PCI_MSI
> > 
> > On Wed, Jun 12, 2019 at 11:34:51AM +0000, Z.q. Hou wrote:
> > > Hi Lorenzo,
> > >
> > > Thanks a lot for your comments!
> > >
> > > > -----Original Message-----
> > > > From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> > > > Sent: 2019年6月12日 1:00
> > > > To: Z.q. Hou <zhiqiang.hou@nxp.com>
> > > > Cc: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> > > > devicetree@vger.kernel.org; linux-kernel@vger.kernel.org;
> > > > bhelgaas@google.com; robh+dt@kernel.org; mark.rutland@arm.com;
> > > > l.subrahmanya@mobiveil.co.in; shawnguo@kernel.org; Leo Li
> > > > <leoyang.li@nxp.com>; catalin.marinas@arm.com;
> > will.deacon@arm.com;
> > > > Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian
> > <minghuan.lian@nxp.com>;
> > > > Xiaowei Bao <xiaowei.bao@nxp.com>
> > > > Subject: Re: [PATCHv5 04/20] PCI: mobiveil: Remove the flag
> > > > MSI_FLAG_MULTI_PCI_MSI
> > > >
> > > > On Fri, Apr 12, 2019 at 08:35:36AM +0000, Z.q. Hou wrote:
> > > > > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> > > > >
> > > > > The current code does not support multiple MSIs, so remove the
> > > > > corresponding flag from the msi_domain_info structure.
> > > >
> > > > Please explain me what's the problem before removing multi MSI support.
> > >
> > > NXP LX2 PCIe use the GIC-ITS instead of Mobiveil IP internal MSI
> > > controller, so, I didn't encounter problem.
> > 
> > Well, you sent a patch to fix an issue, explain me the issue you are fixing then,
> > aka what have you sent this patch for ?
> 
> I did not face issue, as I have explained NXP does not use the
> Mobiveil IP's MSI controller.  But obviously the MSI allocate function
> does not support multiple MSI, so I submitted this patch.

There is nothing obvious. Write what you are fixing in the commit log
and I will apply the patch, I won't write the commit log for you. Anyone
should be able to understand why a patch was needed by reading the
commit log, it is as important as writing the code itself.

Thanks,
Lorenzo

> Thanks,
> Zhiqiang
> 
> > 
> > Lorenzo
> > 
> > > Subbu, did you test with Endpoint supporting multi MSI?
> > >
> > > Thanks,
> > > Zhiqiang
> > >
> > > >
> > > > Thanks,
> > > > Lorenzo
> > > >
> > > > > Fixes: 1e913e58335f ("PCI: mobiveil: Add MSI support")
> > > > > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> > > > > Reviewed-by: Minghuan Lian <Minghuan.Lian@nxp.com>
> > > > > ---
> > > > > V5:
> > > > >  - Corrected the subject.
> > > > >
> > > > >  drivers/pci/controller/pcie-mobiveil.c | 2 +-
> > > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > >
> > > > > diff --git a/drivers/pci/controller/pcie-mobiveil.c
> > > > > b/drivers/pci/controller/pcie-mobiveil.c
> > > > > index 563210e731d3..a0dd337c6214 100644
> > > > > --- a/drivers/pci/controller/pcie-mobiveil.c
> > > > > +++ b/drivers/pci/controller/pcie-mobiveil.c
> > > > > @@ -703,7 +703,7 @@ static struct irq_chip mobiveil_msi_irq_chip =
> > > > > {
> > > > >
> > > > >  static struct msi_domain_info mobiveil_msi_domain_info = {
> > > > >  	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS |
> > > > MSI_FLAG_USE_DEF_CHIP_OPS |
> > > > > -		   MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX),
> > > > > +		   MSI_FLAG_PCI_MSIX),
> > > > >  	.chip	= &mobiveil_msi_irq_chip,
> > > > >  };
> > > > >
> > > > > --
> > > > > 2.17.1
> > > > >

  reply index

Thread overview: 67+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-12  8:35 [PATCHv5 00/20] PCI: mobiveil: fixes for Mobiveil PCIe Host Bridge IP driver Z.q. Hou
2019-04-12  8:35 ` [PATCHv5 01/20] PCI: mobiveil: Unify register accessors Z.q. Hou
2019-04-12  8:35 ` [PATCHv5 02/20] PCI: mobiveil: Format the code without functionality change Z.q. Hou
2019-07-03 15:10   ` Lorenzo Pieralisi
2019-07-04  2:41     ` Z.q. Hou
2019-07-03 15:19   ` Lorenzo Pieralisi
2019-07-03 15:24     ` Lorenzo Pieralisi
2019-07-04  3:00     ` Z.q. Hou
2019-07-04 10:56       ` Lorenzo Pieralisi
2019-07-05  2:24         ` Z.q. Hou
2019-04-12  8:35 ` [PATCHv5 03/20] PCI: mobiveil: Correct the returned error number Z.q. Hou
2019-07-03 14:17   ` Lorenzo Pieralisi
2019-07-04  2:38     ` Z.q. Hou
2019-04-12  8:35 ` [PATCHv5 04/20] PCI: mobiveil: Remove the flag MSI_FLAG_MULTI_PCI_MSI Z.q. Hou
2019-06-11 16:59   ` Lorenzo Pieralisi
2019-06-11 17:29     ` Marc Zyngier
2019-06-12 10:54       ` Lorenzo Pieralisi
2019-06-12 11:22       ` Marc Zyngier
2019-06-12 11:34     ` Z.q. Hou
2019-06-12 13:08       ` Lorenzo Pieralisi
2019-06-15  1:30         ` Z.q. Hou
2019-06-17  9:33           ` Lorenzo Pieralisi [this message]
2019-06-17 10:34             ` Z.q. Hou
2019-06-28 11:35               ` Lorenzo Pieralisi
2019-07-01 10:07                 ` Z.q. Hou
2019-04-12  8:35 ` [PATCHv5 05/20] PCI: mobiveil: Correct PCI base address in MEM/IO outbound windows Z.q. Hou
2019-04-12  8:35 ` [PATCHv5 06/20] PCI: mobiveil: Replace the resource list iteration function Z.q. Hou
2019-04-12  8:35 ` [PATCHv5 07/20] PCI: mobiveil: Use WIN_NUM_0 explicitly for CFG outbound window Z.q. Hou
2019-06-12 15:13   ` Lorenzo Pieralisi
2019-04-12  8:36 ` [PATCHv5 08/20] PCI: mobiveil: Use the 1st inbound window for MEM inbound transactions Z.q. Hou
2019-06-28 16:02   ` Lorenzo Pieralisi
2019-07-01 10:18     ` Z.q. Hou
2019-04-12  8:36 ` [PATCHv5 09/20] PCI: mobiveil: Correct inbound/outbound window setup routines Z.q. Hou
2019-06-28 16:41   ` Lorenzo Pieralisi
2019-07-01 10:24     ` Z.q. Hou
2019-04-12  8:36 ` [PATCHv5 10/20] PCI: mobiveil: Fix the INTx process errors Z.q. Hou
2019-06-12 15:08   ` Lorenzo Pieralisi
2019-06-14  7:08     ` Karthikeyan Mitran
2019-06-14 10:43       ` Lorenzo Pieralisi
2019-06-19  5:28         ` Karthikeyan Mitran
2019-06-19  7:24           ` Z.q. Hou
2019-06-28 17:05   ` Lorenzo Pieralisi
2019-07-01 10:27     ` Z.q. Hou
2019-04-12  8:36 ` [PATCHv5 11/20] PCI: mobiveil: Correct the fixup of Class Code field Z.q. Hou
2019-04-12  8:36 ` [PATCHv5 12/20] PCI: mobiveil: Move the link up waiting out of mobiveil_host_init() Z.q. Hou
2019-04-12  8:36 ` [PATCHv5 13/20] PCI: mobiveil: Move IRQ chained handler setup out of DT parse Z.q. Hou
2019-04-12  8:36 ` [PATCHv5 14/20] PCI: mobiveil: Initialize Primary/Secondary/Subordinate bus numbers Z.q. Hou
2019-04-12  8:36 ` [PATCHv5 15/20] PCI: mobiveil: Fix the checking of valid device Z.q. Hou
2019-04-12  8:36 ` [PATCHv5 16/20] PCI: mobiveil: Add link up condition check Z.q. Hou
2019-06-11 17:17   ` Lorenzo Pieralisi
2019-06-12 11:36     ` Z.q. Hou
2019-04-12  8:36 ` [PATCHv5 17/20] PCI: mobiveil: Complete initialization of host even if no PCIe link Z.q. Hou
2019-06-12 14:34   ` Lorenzo Pieralisi
2019-06-15  2:34     ` Z.q. Hou
2019-04-12  8:37 ` [PATCHv5 18/20] PCI: mobiveil: Disable IB and OB windows set by bootloader Z.q. Hou
2019-06-12 16:23   ` Lorenzo Pieralisi
2019-06-15  5:03     ` Z.q. Hou
2019-06-17  9:30       ` Lorenzo Pieralisi
2019-06-17 10:42         ` Z.q. Hou
2019-04-12  8:37 ` [PATCHv5 19/20] PCI: mobiveil: Add 8-bit and 16-bit register accessors Z.q. Hou
2019-06-12 13:54   ` Lorenzo Pieralisi
2019-06-15  1:13     ` Z.q. Hou
2019-06-17  9:29       ` Lorenzo Pieralisi
2019-06-17 10:16         ` Z.q. Hou
2019-04-12  8:37 ` [PATCHv5 20/20] dt-bindings: PCI: mobiveil: Change gpio_slave and apb_csr to optional Z.q. Hou
2019-07-03 10:33 ` [PATCHv5 00/20] PCI: mobiveil: fixes for Mobiveil PCIe Host Bridge IP driver Lorenzo Pieralisi
2019-07-04  2:36   ` Z.q. Hou

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