lkml.org 
[lkml]   [2022]   [Jul]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH V13 3/9] PCI: Create PCIe library functions in support of DOE mailboxes.
On Tue, Jul 05, 2022 at 08:49:26AM -0700, ira.weiny@intel.com wrote:
> From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Possible subject:

PCI/DOE: Add DOE mailbox support functions

(no trailing period required)

> Introduced in a PCIe r6.0, sec 6.30, DOE provides a config space based
> mailbox with standard protocol discovery. Each mailbox is accessed
> through a DOE Extended Capability.
>
> Each DOE mailbox must support the DOE discovery protocol in addition to
> any number of additional protocols.
>
> Define core PCIe functionality to manage a single PCIe DOE mailbox at a
> defined config space offset. Functionality includes iterating,
> creating, query of supported protocol, and task submission. Destruction
> of the mailboxes is device managed.
>
> Cc: "Li, Ming" <ming4.li@intel.com>
> Cc: Bjorn Helgaas <helgaas@kernel.org>
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> Co-developed-by: Ira Weiny <ira.weiny@intel.com>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>

Whenever the CXL folks are happy with this:

Acked-by: Bjorn Helgaas <bhelgaas@google.com>

> +static int pci_doe_recv_resp(struct pci_doe_mb *doe_mb, struct pci_doe_task *task)
> ...
> + pci_err(pdev,
> + "[%x] expected [VID, Protocol] = [%04x, %02x], got [%04x, %02x]\n",

Since the string already wraps, I think there's no benefit to starting
it on its own line. Joining with "pci_err(pdev, "[%x] ..." improves
greppability slightly.

> + pci_err(pdev,
> + "[%x] busy detected; another entity is sending conflicting requests\n",
> + offset);

Ditto.

> + * pci_doe_submit_task() - Submit a task to be processed by the state machine
> ...
> + * RETURNS: 0 when task has been successful queued, -ERRNO on error

successfully

> +int pci_doe_submit_task(struct pci_doe_mb *doe_mb, struct pci_doe_task *task)
> ...
> + * DOE requests must be a whole number of DW
> + * and the response needs to be big enough for at least 1 DW

Rewrap to fill 78 columns or so.

\
 
 \ /
  Last update: 2022-07-07 18:23    [W:0.302 / U:0.016 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site