linux-kernel - Re: [PATCH 2/2 V2] MFD: intel

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <d4e0883f6f71bbfc68804c97222b28acad77f969.camel@linux.intel.com>
Date:   Tue, 09 Mar 2021 09:27:18 -0800
From:   "David E. Box" <david.e.box@...ux.intel.com>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     hdegoede@...hat.com, mgross@...ux.intel.com,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH 2/2 V2] MFD: intel_pmt: Add support for DG1

On Tue, 2021-03-09 at 16:45 +0000, Lee Jones wrote:
> On Wed, 24 Feb 2021, David E. Box wrote:
> 
> > Adds PMT Telemetry aggregator support for the DG1 graphics PCIe
> > card. The
> > device does not have the DVSEC region in its PCI config space so
> > hard
> > code the discovery table data in the driver. Also requires a fix
> > for DG1
> > in the Telemetry driver for how the ACCESS_TYPE field is used.
> > 
> > Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
> > ---
> > Based on 5.11-rc1 review-hans branch:
> > https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans
> > 
> > Changes from V1:
> > 
> >         - New patch
> > 
> >  drivers/mfd/intel_pmt.c                    | 101 +++++++++++++++--
> > ----
> >  drivers/platform/x86/intel_pmt_class.c     |  46 ++++++++++
> >  drivers/platform/x86/intel_pmt_class.h     |   1 +
> >  drivers/platform/x86/intel_pmt_telemetry.c |  20 ----
> >  4 files changed, 119 insertions(+), 49 deletions(-)
> > 
> > diff --git a/drivers/mfd/intel_pmt.c b/drivers/mfd/intel_pmt.c
> > index 65da2b17a204..dd7eb614c28e 100644
> > --- a/drivers/mfd/intel_pmt.c
> > +++ b/drivers/mfd/intel_pmt.c
> > @@ -49,10 +49,14 @@ enum pmt_quirks {
> >  
> >         /* Use shift instead of mask to read discovery table offset
> > */
> >         PMT_QUIRK_TABLE_SHIFT   = BIT(2),
> > +
> > +       /* DVSEC not present (provided in driver data) */
> > +       PMT_QUIRK_NO_DVSEC      = BIT(3),
> >  };
> >  
> >  struct pmt_platform_info {
> >         unsigned long quirks;
> > +       struct intel_dvsec_header **capabilities;
> >  };
> >  
> >  static const struct pmt_platform_info tgl_info = {
> > @@ -60,6 +64,26 @@ static const struct pmt_platform_info tgl_info =
> > {
> >                   PMT_QUIRK_TABLE_SHIFT,
> >  };
> >  
> > +/* DG1 Platform with DVSEC quirk*/
> > +static struct intel_dvsec_header dg1_telemetry = {
> > +       .length = 0x10,
> > +       .id = 2,
> > +       .num_entries = 1,
> > +       .entry_size = 3,
> > +       .tbir = 0,
> > +       .offset = 0x466000,
> > +};
> > +
> > +static struct intel_dvsec_header *dg1_capabilities[] = {
> > +       &dg1_telemetry,
> > +       NULL
> > +};
> > +
> > +static const struct pmt_platform_info dg1_info = {
> > +       .quirks = PMT_QUIRK_NO_DVSEC,
> > +       .capabilities = dg1_capabilities,
> > +};
> > +
> >  static int pmt_add_dev(struct pci_dev *pdev, struct
> > intel_dvsec_header *header,
> >                        unsigned long quirks)
> >  {
> > @@ -147,37 +171,54 @@ static int pmt_pci_probe(struct pci_dev
> > *pdev, const struct pci_device_id *id)
> >         if (info)
> >                 quirks = info->quirks;
> >  
> > -       do {
> > -               struct intel_dvsec_header header;
> > -               u32 table;
> > -               u16 vid;
> > +       if (info && (info->quirks & PMT_QUIRK_NO_DVSEC)) {
> 
> Nit: Why not use 'quirks' from a few lines above?

Ack

David

>