Re: [PATCH 3/5] powerpc/powernv: Introduce pnv_pci_poll()

[Bjorn Helgaas <bhelgaas@google.com>]

On Thu, Dec 04, 2014 at 04:54:46PM +1100, Gavin Shan wrote:
> We might not get some PCI slot information (e.g. power status)
> immediately by OPAL API. Instead, opal_pci_poll() need to be called
> for the required information.
> 
> The patch introduces pnv_pci_poll(), which bases on original
> ioda_eeh_poll(), to cover the above case
> 
> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>

Hi Gavin,

This patch doesn't apply cleanly on v3.19-rc1.  Can you refresh this
series, please?

Bjorn

> ---
>  arch/powerpc/platforms/powernv/eeh-ioda.c | 28 ++--------------------------
>  arch/powerpc/platforms/powernv/pci.c      | 19 +++++++++++++++++++
>  arch/powerpc/platforms/powernv/pci.h      |  1 +
>  3 files changed, 22 insertions(+), 26 deletions(-)
> 
> diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c
> index cf38781..21fa033 100644
> --- a/arch/powerpc/platforms/powernv/eeh-ioda.c
> +++ b/arch/powerpc/platforms/powernv/eeh-ioda.c
> @@ -490,24 +490,6 @@ static int ioda_eeh_get_state(struct eeh_pe *pe)
>  	return ioda_eeh_get_pe_state(pe);
>  }
>  
> -static s64 ioda_eeh_poll(uint64_t id)
> -{
> -	s64 rc = OPAL_HARDWARE;
> -
> -	while (1) {
> -		rc = opal_pci_poll(id, NULL);
> -		if (rc <= 0)
> -			break;
> -
> -		if (system_state < SYSTEM_RUNNING)
> -			udelay(1000 * rc);
> -		else
> -			msleep(rc);
> -	}
> -
> -	return rc;
> -}
> -
>  int ioda_eeh_phb_reset(struct pci_controller *hose, int option)
>  {
>  	struct pnv_phb *phb = hose->private_data;
> @@ -536,10 +518,7 @@ int ioda_eeh_phb_reset(struct pci_controller *hose, int option)
>  
>  	/* Issue reset and poll until it's completed */
>  	rc = opal_pci_reset(phb->opal_id, scope, OPAL_ASSERT_RESET);
> -	if (rc > 0)
> -		rc = ioda_eeh_poll(phb->opal_id);
> -
> -	return (rc == OPAL_SUCCESS) ? 0 : -EIO;
> +	return pnv_pci_poll(phb->opal_id, rc, NULL);
>  }
>  
>  static int __ioda_eeh_bridge_reset(struct pci_dev *dev, int option)
> @@ -630,10 +609,7 @@ static int ioda_eeh_bridge_reset(struct pci_dev *dev, int option)
>  	phb = hose->private_data;
>  	id |= (dev->bus->number << 24) | (dev->devfn << 16) | phb->opal_id;
>  	rc = opal_pci_reset(id, scope, OPAL_ASSERT_RESET);
> -	if (rc > 0)
> -		ioda_eeh_poll(id);
> -
> -	return (rc == OPAL_SUCCESS) ? 0 : -EIO;
> +	return pnv_pci_poll(id, rc, NULL);
>  }
>  
>  static int pnv_pci_dev_reset_type(struct pci_dev *pdev, void *data)
> diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c
> index 4b20f2c..6dc8ea9 100644
> --- a/arch/powerpc/platforms/powernv/pci.c
> +++ b/arch/powerpc/platforms/powernv/pci.c
> @@ -45,6 +45,25 @@
>  #define cfg_dbg(fmt...)	do { } while(0)
>  //#define cfg_dbg(fmt...)	printk(fmt)
>  
> +int pnv_pci_poll(uint64_t id, int64_t rval, uint8_t *pval)
> +{
> +	while (rval > 0) {
> +		rval = opal_pci_poll(id, pval);
> +		if (rval == OPAL_SUCCESS && pval)
> +			rval = opal_pci_poll(id, pval);
> +
> +		if (rval <= 0)
> +			break;
> +
> +		if (system_state < SYSTEM_RUNNING)
> +			udelay(1000 * rval);
> +		else
> +			msleep(rval);
> +	}
> +
> +	return rval ? -EIO : 0;
> +}
> +
>  #ifdef CONFIG_PCI_MSI
>  static int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
>  {
> diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
> index 6c02ff8..396fe02 100644
> --- a/arch/powerpc/platforms/powernv/pci.h
> +++ b/arch/powerpc/platforms/powernv/pci.h
> @@ -217,6 +217,7 @@ extern struct pci_ops pnv_pci_ops;
>  extern struct pnv_eeh_ops ioda_eeh_ops;
>  #endif
>  
> +int pnv_pci_poll(uint64_t id, int64_t rval, uint8_t *pval);
>  void pnv_pci_dump_phb_diag_data(struct pci_controller *hose,
>  				unsigned char *log_buff);
>  int pnv_pci_cfg_read(struct device_node *dn,
> -- 
> 1.8.3.2
> 
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