From: Brian King <brking@linux•vnet.ibm.com>
To: Brian King <brking@linux•vnet.ibm.com>
Cc: paulus@samba•org, linas@boardhead•austin.ibm.com,
linuxppc-dev@ozlabs•org
Subject: Re: [PATCH 1/1] powerpc: Export PCI slot reset API
Date: Tue, 23 Jan 2007 17:28:42 -0600 [thread overview]
Message-ID: <45B69A2A.9060207@linux.vnet.ibm.com> (raw)
In-Reply-To: <11686349711123-patch-mail.ibm.com>
Any comments on this?
Thanks,
Brian
Brian King wrote:
> Adds two new APIs to assert/deassert PCI reset to a given
> device. This is needed for an ipr PCI-E adapter which does not
> properly implement either BIST nor PCI-E hot reset, requiring
> a PCI-E warm reset, which is what this implements.
>
> Signed-off-by: Brian King <brking@linux•vnet.ibm.com>
> ---
>
> linux-2.6-bjking1/arch/powerpc/platforms/pseries/eeh.c | 41 +++++++++++++++++
> linux-2.6-bjking1/include/asm-powerpc/ppc-pci.h | 3 +
> 2 files changed, 44 insertions(+)
>
> diff -puN arch/powerpc/platforms/pseries/eeh.c~powerpc_slot_reset_api2 arch/powerpc/platforms/pseries/eeh.c
> --- linux-2.6/arch/powerpc/platforms/pseries/eeh.c~powerpc_slot_reset_api2 2007-01-11 15:52:57.000000000 -0600
> +++ linux-2.6-bjking1/arch/powerpc/platforms/pseries/eeh.c 2007-01-11 15:52:57.000000000 -0600
> @@ -591,6 +591,47 @@ static void __rtas_set_slot_reset(struct
> msleep (PCI_BUS_SETTLE_TIME_MSEC);
> }
>
> +/**
> + * pci_set_slot_reset - Assert PCI reset to the PCI slot
> + * @dev: pci device struct
> + *
> + * After asserting PCI reset, the caller should wait for
> + * 100 milliseconds or longer.
> + *
> + * Return value:
> + * 0 if success
> + **/
> +int pci_set_slot_reset(struct pci_dev *dev)
> +{
> + struct device_node *dn = pci_device_to_OF_node(dev);
> + struct pci_dn *pdn = PCI_DN(dn);
> +
> + rtas_pci_slot_reset(pdn, 3);
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(pci_set_slot_reset);
> +
> +/**
> + * pci_clear_slot_reset - Clear PCI reset to the PCI slot
> + * @dev: pci device struct
> + *
> + * After clearing PCI reset, the caller should wait 1.8 seconds
> + * or longer for the bus to stabilize and the device to come
> + * ready.
> + *
> + * Return value:
> + * 0 if success
> + **/
> +int pci_clear_slot_reset(struct pci_dev *dev)
> +{
> + struct device_node *dn = pci_device_to_OF_node(dev);
> + struct pci_dn *pdn = PCI_DN(dn);
> +
> + rtas_pci_slot_reset (pdn, 0);
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(pci_clear_slot_reset);
> +
> int rtas_set_slot_reset(struct pci_dn *pdn)
> {
> int i, rc;
> diff -puN include/asm-powerpc/ppc-pci.h~powerpc_slot_reset_api2 include/asm-powerpc/ppc-pci.h
> --- linux-2.6/include/asm-powerpc/ppc-pci.h~powerpc_slot_reset_api2 2007-01-11 15:52:57.000000000 -0600
> +++ linux-2.6-bjking1/include/asm-powerpc/ppc-pci.h 2007-01-11 15:52:57.000000000 -0600
> @@ -124,6 +124,9 @@ void eeh_clear_slot (struct device_node
> /* Find the associated "Partiationable Endpoint" PE */
> struct device_node * find_device_pe(struct device_node *dn);
>
> +int pci_set_slot_reset(struct pci_dev *dev);
> +int pci_clear_slot_reset(struct pci_dev *dev);
> +
> #endif
>
> #endif /* __KERNEL__ */
> _
--
Brian King
eServer Storage I/O
IBM Linux Technology Center
next prev parent reply other threads:[~2007-01-23 23:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-12 20:49 [PATCH 1/1] powerpc: Export PCI slot reset API Brian King
2007-01-23 23:28 ` Brian King [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-01-24 22:03 Brian King
2007-01-26 2:49 Christoph Hellwig
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=45B69A2A.9060207@linux.vnet.ibm.com \
--to=brking@linux$(echo .)vnet.ibm.com \
--cc=linas@boardhead$(echo .)austin.ibm.com \
--cc=linuxppc-dev@ozlabs$(echo .)org \
--cc=paulus@samba$(echo .)org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox