From: Bjorn Helgaas <helgaas@kernel.org>
To: sathyanarayanan.kuppuswamy@linux.intel.com
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
ashok.raj@intel.com, keith.busch@intel.com
Subject: Re: [PATCH v5 3/7] PCI/ATS: Initialize PASID in pci_ats_init()
Date: Wed, 14 Aug 2019 23:48:26 -0500 [thread overview]
Message-ID: <20190815044826.GE253360@google.com> (raw)
In-Reply-To: <5edb0209f7657e0706d4e5305ea0087873603daf.1564702313.git.sathyanarayanan.kuppuswamy@linux.intel.com>
On Thu, Aug 01, 2019 at 05:06:00PM -0700, sathyanarayanan.kuppuswamy@linux.intel.com wrote:
> From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
>
> Currently, PASID Capability checks are repeated across all PASID API's.
> Instead, cache the capability check result in pci_pasid_init() and use
> it in other PASID API's. Also, since PASID is a shared resource between
> PF/VF, initialize PASID features with default values in pci_pasid_init().
>
> Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
> ---
> drivers/pci/ats.c | 74 +++++++++++++++++++++++++++++------------
> include/linux/pci-ats.h | 5 +++
> include/linux/pci.h | 1 +
> 3 files changed, 59 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/pci/ats.c b/drivers/pci/ats.c
> index 280be911f190..1f4be27a071d 100644
> --- a/drivers/pci/ats.c
> +++ b/drivers/pci/ats.c
> @@ -30,6 +30,8 @@ void pci_ats_init(struct pci_dev *dev)
> dev->ats_cap = pos;
>
> pci_pri_init(dev);
> +
> + pci_pasid_init(dev);
> }
>
> /**
> @@ -315,6 +317,40 @@ EXPORT_SYMBOL_GPL(pci_reset_pri);
> #endif /* CONFIG_PCI_PRI */
>
> #ifdef CONFIG_PCI_PASID
> +
> +void pci_pasid_init(struct pci_dev *pdev)
> +{
> ...
> +}
> diff --git a/include/linux/pci-ats.h b/include/linux/pci-ats.h
> index 33653d4ca94f..bc7f815d38ff 100644
> --- a/include/linux/pci-ats.h
> +++ b/include/linux/pci-ats.h
> @@ -40,6 +40,7 @@ static inline int pci_reset_pri(struct pci_dev *pdev)
>
> #ifdef CONFIG_PCI_PASID
>
> +void pci_pasid_init(struct pci_dev *pdev);
This also looks like it should be static in ats.c.
> int pci_enable_pasid(struct pci_dev *pdev, int features);
> void pci_disable_pasid(struct pci_dev *pdev);
> void pci_restore_pasid_state(struct pci_dev *pdev);
> @@ -48,6 +49,10 @@ int pci_max_pasids(struct pci_dev *pdev);
>
> #else /* CONFIG_PCI_PASID */
>
> +static inline void pci_pasid_init(struct pci_dev *pdev)
> +{
> +}
> +
> static inline int pci_enable_pasid(struct pci_dev *pdev, int features)
> {
> return -EINVAL;
next prev parent reply other threads:[~2019-08-15 4:48 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-02 0:05 [PATCH v5 0/7] Fix PF/VF dependency issue sathyanarayanan.kuppuswamy
2019-08-02 0:05 ` [PATCH v5 1/7] PCI/ATS: Fix pci_prg_resp_pasid_required() dependency issues sathyanarayanan.kuppuswamy
2019-08-12 20:04 ` Bjorn Helgaas
2019-08-12 20:20 ` sathyanarayanan kuppuswamy
2019-08-13 3:51 ` Bjorn Helgaas
2019-08-16 18:06 ` Kuppuswamy Sathyanarayanan
2019-08-02 0:05 ` [PATCH v5 2/7] PCI/ATS: Initialize PRI in pci_ats_init() sathyanarayanan.kuppuswamy
2019-08-12 20:04 ` Bjorn Helgaas
2019-08-12 21:35 ` sathyanarayanan kuppuswamy
2019-08-13 4:10 ` Bjorn Helgaas
2019-08-15 4:46 ` Bjorn Helgaas
2019-08-15 17:30 ` Kuppuswamy Sathyanarayanan
2019-08-16 17:31 ` Bjorn Helgaas
2019-08-02 0:06 ` [PATCH v5 3/7] PCI/ATS: Initialize PASID " sathyanarayanan.kuppuswamy
2019-08-12 20:04 ` Bjorn Helgaas
2019-08-15 4:48 ` Bjorn Helgaas [this message]
2019-08-15 4:56 ` Bjorn Helgaas
2019-08-15 17:31 ` Kuppuswamy Sathyanarayanan
2019-08-02 0:06 ` [PATCH v5 4/7] PCI/ATS: Add PRI support for PCIe VF devices sathyanarayanan.kuppuswamy
2019-08-12 20:04 ` Bjorn Helgaas
2019-08-12 21:40 ` sathyanarayanan kuppuswamy
2019-08-13 4:16 ` Bjorn Helgaas
2019-08-15 22:20 ` Bjorn Helgaas
2019-08-15 22:39 ` Kuppuswamy Sathyanarayanan
2019-08-19 14:15 ` Bjorn Helgaas
2019-08-19 22:53 ` Kuppuswamy Sathyanarayanan
2019-08-19 23:19 ` Bjorn Helgaas
2019-08-28 18:21 ` Kuppuswamy Sathyanarayanan
2019-08-28 18:57 ` Bjorn Helgaas
2019-08-02 0:06 ` [PATCH v5 5/7] PCI/ATS: Add PASID " sathyanarayanan.kuppuswamy
2019-08-12 20:05 ` Bjorn Helgaas
2019-08-13 22:19 ` Kuppuswamy Sathyanarayanan
2019-08-15 5:04 ` Bjorn Helgaas
2019-08-16 1:21 ` Kuppuswamy Sathyanarayanan
2019-08-02 0:06 ` [PATCH v5 6/7] PCI/ATS: Disable PF/VF ATS service independently sathyanarayanan.kuppuswamy
2019-08-02 0:06 ` [PATCH v5 7/7] PCI: Skip Enhanced Allocation (EA) initialization for VF device sathyanarayanan.kuppuswamy
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