From: "Li, Ming" <ming4.li@intel.com>
To: Jonathan Cameron <Jonathan.Cameron@Huawei.com>,
Lukas Wunner <lukas@wunner.de>
Cc: Bjorn Helgaas <helgaas@kernel.org>, <linux-pci@vger.kernel.org>,
"Gregory Price" <gregory.price@memverge.com>,
Ira Weiny <ira.weiny@intel.com>,
"Dan Williams" <dan.j.williams@intel.com>,
Alison Schofield <alison.schofield@intel.com>,
Vishal Verma <vishal.l.verma@intel.com>,
"Dave Jiang" <dave.jiang@intel.com>,
Hillf Danton <hdanton@sina.com>,
Ben Widawsky <bwidawsk@kernel.org>, <linuxarm@huawei.com>,
<linux-cxl@vger.kernel.org>
Subject: Re: [PATCH v2 06/10] PCI/DOE: Allow mailbox creation without devres management
Date: Fri, 3 Feb 2023 17:06:21 +0800 [thread overview]
Message-ID: <d6d3a6c8-7b82-77c2-3407-705916c020b7@intel.com> (raw)
In-Reply-To: <20230124121543.00002600@Huawei.com>
On 1/24/2023 8:15 PM, Jonathan Cameron wrote:
> On Mon, 23 Jan 2023 11:16:00 +0100
> Lukas Wunner <lukas@wunner.de> wrote:
>
>> DOE mailbox creation is currently only possible through a devres-managed
>> API. The lifetime of mailboxes thus ends with driver unbinding.
>>
>> An upcoming commit will create DOE mailboxes upon device enumeration by
>> the PCI core. Their lifetime shall not be limited by a driver.
>>
>> Therefore rework pcim_doe_create_mb() into the non-devres-managed
>> pci_doe_create_mb(). Add pci_doe_destroy_mb() for mailbox destruction
>> on device removal.
>>
>> Provide a devres-managed wrapper under the existing pcim_doe_create_mb()
>> name.
>>
>> Tested-by: Ira Weiny <ira.weiny@intel.com>
>> Signed-off-by: Lukas Wunner <lukas@wunner.de>
> Hi Lukas,
>
> A few comments inline.
>
> In particular I'd like to understand why flushing in the tear down
> can't always be done as that makes the code more complex.
>
> Might become clear in later patches though as I've not read ahead yet!
>
> Jonathan
>
>> ---
>> drivers/pci/doe.c | 103 +++++++++++++++++++++++++++++++---------------
>> 1 file changed, 70 insertions(+), 33 deletions(-)
>>
>> diff --git a/drivers/pci/doe.c b/drivers/pci/doe.c
>> index 066400531d09..cc1fdd75ad2a 100644
>> --- a/drivers/pci/doe.c
>> +++ b/drivers/pci/doe.c
>> @@ -37,7 +37,7 @@
>> *
>> * This state is used to manage a single DOE mailbox capability. All fields
>> * should be considered opaque to the consumers and the structure passed into
>> - * the helpers below after being created by devm_pci_doe_create()
>> + * the helpers below after being created by pci_doe_create_mb().
>> *
>> * @pdev: PCI device this mailbox belongs to
>> * @cap_offset: Capability offset
>> @@ -412,20 +412,6 @@ static int pci_doe_cache_protocols(struct pci_doe_mb *doe_mb)
>> return 0;
>> }
>>
......
>> +/**
>> + * pci_doe_destroy_mb() - Destroy a DOE mailbox object
>> + *
>> + * @ptr: Pointer to DOE mailbox
>> + *
>> + * Destroy all internal data structures created for the DOE mailbox.
> >> + */
>> +static void pci_doe_destroy_mb(void *ptr)
Sorry, didn't find the original patch, reply on here.
I don't get why uses "void *ptr" as the parameter of this function, maybe I miss something. I guess we can use "struct pci_doe_mb *doe_mb" as the parameter.
Thanks
Ming
>> +{
>> + struct pci_doe_mb *doe_mb = ptr;
>> +
>> + xa_destroy(&doe_mb->prots);
>> + destroy_workqueue(doe_mb->work_queue);
>> + kfree(doe_mb);
>> +}
>> +
>> +/**
>> + * pcim_doe_create_mb() - Create a DOE mailbox object
>> + *
>> + * @pdev: PCI device to create the DOE mailbox for
>> + * @cap_offset: Offset of the DOE mailbox
>> + *
>> + * Create a single mailbox object to manage the mailbox protocol at the
>> + * cap_offset specified. The mailbox will automatically be destroyed on
>> + * driver unbinding from @pdev.
>> + *
>> + * RETURNS: created mailbox object on success
>> + * ERR_PTR(-errno) on failure
>> + */
>> +struct pci_doe_mb *pcim_doe_create_mb(struct pci_dev *pdev, u16 cap_offset)
>> +{
>> + struct pci_doe_mb *doe_mb;
>> + int rc;
>> +
>> + doe_mb = pci_doe_create_mb(pdev, cap_offset);
>> + if (IS_ERR(doe_mb))
>> + return doe_mb;
>> +
>> + rc = devm_add_action(&pdev->dev, pci_doe_destroy_mb, doe_mb);
>> + if (rc) {
>> + pci_doe_flush_mb(doe_mb);
>> + pci_doe_destroy_mb(doe_mb);
>> return ERR_PTR(rc);
>> }
>>
>> + rc = devm_add_action_or_reset(&pdev->dev, pci_doe_flush_mb, doe_mb);
>> + if (rc)
>> + return ERR_PTR(rc);
>> +
>> return doe_mb;
>> }
>> EXPORT_SYMBOL_GPL(pcim_doe_create_mb);
>
next prev parent reply other threads:[~2023-02-03 9:06 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-23 10:10 [PATCH v2 00/10] Collection of DOE material Lukas Wunner
2023-01-23 10:11 ` [PATCH v2 01/10] PCI/DOE: Silence WARN splat with CONFIG_DEBUG_OBJECTS=y Lukas Wunner
2023-01-24 0:33 ` Ira Weiny
2023-01-24 10:32 ` Jonathan Cameron
2023-01-25 21:05 ` Lukas Wunner
2023-01-24 16:18 ` Gregory Price
2023-02-10 23:50 ` Dan Williams
2023-01-23 10:12 ` [PATCH v2 02/10] PCI/DOE: Fix memory leak " Lukas Wunner
2023-01-24 0:35 ` Ira Weiny
2023-01-24 10:33 ` Jonathan Cameron
2023-02-10 23:52 ` Dan Williams
2023-01-23 10:13 ` [PATCH v2 03/10] PCI/DOE: Provide synchronous API and use it internally Lukas Wunner
2023-01-24 0:48 ` Ira Weiny
2023-01-24 10:40 ` Jonathan Cameron
2023-01-24 20:07 ` Ira Weiny
2023-02-10 23:57 ` Dan Williams
2023-01-23 10:14 ` [PATCH v2 04/10] cxl/pci: Use synchronous API for DOE Lukas Wunner
2023-01-24 0:52 ` Ira Weiny
2023-02-03 8:53 ` Li, Ming
2023-02-03 8:56 ` Li, Ming
2023-02-03 9:54 ` Lukas Wunner
2023-01-24 11:01 ` Jonathan Cameron
2023-02-10 22:17 ` Lukas Wunner
2023-01-23 10:15 ` [PATCH v2 05/10] PCI/DOE: Make asynchronous API private Lukas Wunner
2023-01-24 0:55 ` Ira Weiny
2023-01-24 11:03 ` Jonathan Cameron
2023-01-23 10:16 ` [PATCH v2 06/10] PCI/DOE: Allow mailbox creation without devres management Lukas Wunner
2023-01-24 12:15 ` Jonathan Cameron
2023-01-24 12:18 ` Jonathan Cameron
2023-02-03 9:06 ` Li, Ming [this message]
2023-02-03 9:09 ` Li, Ming
2023-02-03 10:08 ` Lukas Wunner
2023-02-10 22:03 ` Lukas Wunner
2023-01-23 10:17 ` [PATCH v2 07/10] PCI/DOE: Create mailboxes on device enumeration Lukas Wunner
2023-01-24 1:14 ` Ira Weiny
2023-01-24 12:21 ` Jonathan Cameron
2023-01-23 10:18 ` [PATCH v2 08/10] cxl/pci: Use CDAT DOE mailbox created by PCI core Lukas Wunner
2023-01-24 1:18 ` Ira Weiny
2023-01-24 12:25 ` Jonathan Cameron
2023-01-23 10:19 ` [PATCH v2 09/10] PCI/DOE: Make mailbox creation API private Lukas Wunner
2023-01-24 1:25 ` Ira Weiny
2023-01-24 12:26 ` Jonathan Cameron
2023-01-23 10:20 ` [PATCH v2 10/10] PCI/DOE: Relax restrictions on request and response size Lukas Wunner
2023-01-23 22:29 ` Bjorn Helgaas
2023-01-24 1:43 ` Ira Weiny
2023-02-10 21:47 ` Lukas Wunner
2023-01-24 12:43 ` Jonathan Cameron
2023-01-24 23:51 ` Bjorn Helgaas
2023-01-25 9:47 ` Jonathan Cameron
2023-02-10 22:10 ` Lukas Wunner
2023-01-23 22:30 ` [PATCH v2 00/10] Collection of DOE material Bjorn Helgaas
2023-02-10 21:39 ` Lukas Wunner
2023-02-11 0:04 ` Dan Williams
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