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SubjectRE: [PATCHv10 07/13] PCI: mobiveil: Allow mobiveil_host_init() to be used to re-init host
Date
Hi Andrew,

Thanks a lot for your review!

Thanks,
Zhiqiang

> -----Original Message-----
> From: Andrew Murray <amurray@thegoodpenguin.co.uk>
> Sent: 2020年2月21日 1:29
> 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; andrew.murray@arm.com;
> arnd@arndb.de; mark.rutland@arm.com; l.subrahmanya@mobiveil.co.in;
> shawnguo@kernel.org; m.karthikeyan@mobiveil.co.in; Leo Li
> <leoyang.li@nxp.com>; lorenzo.pieralisi@arm.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: [PATCHv10 07/13] PCI: mobiveil: Allow mobiveil_host_init() to
> be used to re-init host
>
> On Thu, Feb 13, 2020 at 12:06:38PM +0800, Zhiqiang Hou wrote:
> > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> >
> > Allow the mobiveil_host_init() function to be used to re-init host
> > controller's PAB and GPEX CSR register block, as NXP integrated
> > Mobiveil IP has to reset and then re-init the PAB and GPEX CSR
> > registers upon hot-reset.
> >
> > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> > Reviewed-by: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
>
> Reviewed-by: Andrew Murray <amurray@thegoodpenguin.co.uk>
>
> > ---
> > V10:
> > - Refined the subject and change log.
> >
> > .../controller/mobiveil/pcie-mobiveil-host.c | 19 ++++++++++++-------
> > .../pci/controller/mobiveil/pcie-mobiveil.h | 1 +
> > 2 files changed, 13 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
> > b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
> > index 53ab8412a1de..44dd641fede3 100644
> > --- a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
> > +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
> > @@ -221,18 +221,23 @@ static void mobiveil_pcie_enable_msi(struct
> mobiveil_pcie *pcie)
> > writel_relaxed(1, pcie->apb_csr_base + MSI_ENABLE_OFFSET); }
> >
> > -static int mobiveil_host_init(struct mobiveil_pcie *pcie)
> > +int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit)
> > {
> > struct mobiveil_root_port *rp = &pcie->rp;
> > struct pci_host_bridge *bridge = rp->bridge;
> > u32 value, pab_ctrl, type;
> > struct resource_entry *win;
> >
> > - /* setup bus numbers */
> > - value = mobiveil_csr_readl(pcie, PCI_PRIMARY_BUS);
> > - value &= 0xff000000;
> > - value |= 0x00ff0100;
> > - mobiveil_csr_writel(pcie, value, PCI_PRIMARY_BUS);
> > + pcie->ib_wins_configured = 0;
> > + pcie->ob_wins_configured = 0;
> > +
> > + if (!reinit) {
> > + /* setup bus numbers */
> > + value = mobiveil_csr_readl(pcie, PCI_PRIMARY_BUS);
> > + value &= 0xff000000;
> > + value |= 0x00ff0100;
> > + mobiveil_csr_writel(pcie, value, PCI_PRIMARY_BUS);
> > + }
> >
> > /*
> > * program Bus Master Enable Bit in Command Register in PAB Config
> > @@ -576,7 +581,7 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie
> *pcie)
> > * configure all inbound and outbound windows and prepare the RC for
> > * config access
> > */
> > - ret = mobiveil_host_init(pcie);
> > + ret = mobiveil_host_init(pcie, false);
> > if (ret) {
> > dev_err(dev, "Failed to initialize host\n");
> > return ret;
> > diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h
> > b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
> > index 346bf79a581b..623c5f0c4441 100644
> > --- a/drivers/pci/controller/mobiveil/pcie-mobiveil.h
> > +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
> > @@ -166,6 +166,7 @@ struct mobiveil_pcie { };
> >
> > int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie);
> > +int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit);
> > bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie); int
> > mobiveil_bringup_link(struct mobiveil_pcie *pcie); void
> > program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64
> > cpu_addr,
> > --
> > 2.17.1
> >
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