From: Brian King <brking@linux.vnet.ibm.com>
To: paulus@samba.org
Cc: brking@linux.vnet.ibm.com, linuxppc-dev@ozlabs.org,
thlin@linux.vnet.ibm.com
Subject: [PATCH 1/1] powerpc: Add powerpc PCI-E reset API implementation
Date: Fri, 06 Apr 2007 16:40:40 -0500 [thread overview]
Message-ID: <11758956393793-patch-mail.ibm.com> (raw)
Adds the pSeries platform implementation for a new PCI API
which can be used to issue various types of PCI-E reset,
including PCI-E warm reset and PCI-E hot reset. This is needed
for an ipr PCI-E adapter which does not properly implement BIST.
Running BIST on this adapter results in PCI-E errors. The only
reliable reset mechanism that exists on this hardware is PCI
Fundamental reset (warm reset).
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
---
Paul,
This patch requires a generic PCI layer patch, which is in Greg's
queue for 2.6.22, so do NOT apply this yet. Once the PCI change goes
in, I will resend this patch.
This is an update in response to the comments Linas Vepstas had.
Thanks,
Brian
---
linux-2.6-bjking1/arch/powerpc/platforms/pseries/eeh.c | 30 +++++++++++++++++
1 files changed, 30 insertions(+)
diff -puN arch/powerpc/platforms/pseries/eeh.c~powerpc_slot_reset_api3 arch/powerpc/platforms/pseries/eeh.c
--- linux-2.6/arch/powerpc/platforms/pseries/eeh.c~powerpc_slot_reset_api3 2007-04-06 15:39:12.000000000 -0500
+++ linux-2.6-bjking1/arch/powerpc/platforms/pseries/eeh.c 2007-04-06 15:40:29.000000000 -0500
@@ -561,6 +561,36 @@ rtas_pci_slot_reset(struct pci_dn *pdn,
}
/**
+ * pcibios_set_pcie_slot_reset - Set PCI-E reset state
+ * @dev: pci device struct
+ * @state: reset state to enter
+ *
+ * Return value:
+ * 0 if success
+ **/
+int pcibios_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state)
+{
+ struct device_node *dn = pci_device_to_OF_node(dev);
+ struct pci_dn *pdn = PCI_DN(dn);
+
+ switch (state) {
+ case pcie_deassert_reset:
+ rtas_pci_slot_reset(pdn, 0);
+ break;
+ case pcie_hot_reset:
+ rtas_pci_slot_reset(pdn, 1);
+ break;
+ case pcie_warm_reset:
+ rtas_pci_slot_reset(pdn, 3);
+ break;
+ default:
+ return -EINVAL;
+ };
+
+ return 0;
+}
+
+/**
* rtas_set_slot_reset -- assert the pci #RST line for 1/4 second
* @pdn: pci device node to be reset.
*
_
next reply other threads:[~2007-04-06 21:40 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-06 21:40 Brian King [this message]
2007-04-09 21:22 ` [PATCH 1/1] powerpc: Add powerpc PCI-E reset API implementation Linas Vepstas
-- strict thread matches above, loose matches on Subject: below --
2007-05-07 22:04 Brian King
2007-04-06 14:07 Brian King
2007-04-06 18:52 ` Linas Vepstas
2007-04-06 19:19 ` Brian King
2007-04-06 20:30 ` Linas Vepstas
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=11758956393793-patch-mail.ibm.com \
--to=brking@linux.vnet.ibm.com \
--cc=linuxppc-dev@ozlabs.org \
--cc=paulus@samba.org \
--cc=thlin@linux.vnet.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.