From: Alexey Kardashevskiy <aik@ozlabs•ru>
To: Gavin Shan <gwshan@linux•vnet.ibm.com>,
Wei Yang <weiyang@linux•vnet.ibm.com>
Cc: benh@kernel•crashing.org, linuxppc-dev@ozlabs•org
Subject: Re: [PATCH V2 6/6] powerpc/powernv: allocate discrete PE# when using M64 BAR in Single PE mode
Date: Fri, 7 Aug 2015 20:00:38 +1000 [thread overview]
Message-ID: <55C481C6.2080106@ozlabs.ru> (raw)
In-Reply-To: <20150807055448.GA26338@gwshan>
On 08/07/2015 03:54 PM, Gavin Shan wrote:
> On Fri, Aug 07, 2015 at 01:44:33PM +0800, Wei Yang wrote:
>> On Fri, Aug 07, 2015 at 01:43:01PM +1000, Gavin Shan wrote:
>>> On Fri, Aug 07, 2015 at 10:33:33AM +0800, Wei Yang wrote:
>>>> On Fri, Aug 07, 2015 at 11:36:56AM +1000, Gavin Shan wrote:
>>>>> On Thu, Aug 06, 2015 at 09:41:41PM +0800, Wei Yang wrote:
>>>>>> On Thu, Aug 06, 2015 at 03:36:01PM +1000, Gavin Shan wrote:
>>>>>>> On Wed, Aug 05, 2015 at 09:25:03AM +0800, Wei Yang wrote:
>>>>>>>> When M64 BAR is set to Single PE mode, the PE# assigned to VF could be
>>>>>>>> discrete.
s/discrete/sparse/ may be?
>>>>>>>>
>>>>>>>> This patch restructures the patch to allocate discrete PE# for VFs when M64
>>>>>>>> BAR is set to Single PE mode.
>>>>>>>>
>>>>>>>> Signed-off-by: Wei Yang <weiyang@linux•vnet.ibm.com>
>>>>>>>> ---
>>>>>>>> arch/powerpc/include/asm/pci-bridge.h | 2 +-
>>>>>>>> arch/powerpc/platforms/powernv/pci-ioda.c | 69 +++++++++++++++++++++--------
>>>>>>>> 2 files changed, 51 insertions(+), 20 deletions(-)
>>>>>>>>
>>>>>>>> diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
>>>>>>>> index 8aeba4c..72415c7 100644
>>>>>>>> --- a/arch/powerpc/include/asm/pci-bridge.h
>>>>>>>> +++ b/arch/powerpc/include/asm/pci-bridge.h
>>>>>>>> @@ -213,7 +213,7 @@ struct pci_dn {
>>>>>>>> #ifdef CONFIG_PCI_IOV
>>>>>>>> u16 vfs_expanded; /* number of VFs IOV BAR expanded */
>>>>>>>> u16 num_vfs; /* number of VFs enabled*/
>>>>>>>> - int offset; /* PE# for the first VF PE */
>>>>>>>> + int *offset; /* PE# for the first VF PE or array */
>>>>>>>> bool m64_single_mode; /* Use M64 BAR in Single Mode */
>>>>>>>> #define IODA_INVALID_M64 (-1)
>>>>>>>> int (*m64_map)[PCI_SRIOV_NUM_BARS];
>>>>>>>
>>>>>>> how about renaming "offset" to "pe_num_map", or "pe_map" ? Similar to the comments
>>>>>>> I gave to the "m64_bar_map", num_of_max_vfs entries can be allocated. Though not
>>>>>>> all of them will be used, not too much memory will be wasted.
>>>>>>>
>>>>>>
>>>>>> Thanks for your comment.
>>>>>>
>>>>>> I have thought about change the name to make it more self explain. While
>>>>>> another fact I want to take in is this field is also used to be reflect the
>>>>>> shift offset when M64 BAR is used in the Shared Mode. So I maintain the name.
>>>>>>
>>>>>> How about use "enum", one maintain the name "offset", and another one rename to
>>>>>> "pe_num_map". And use the meaningful name at proper place?
>>>>>>
>>>>
>>>> So I suppose you agree with my naming proposal.
>>>>
>>>
>>> No, I dislike the "enum" things.
>>>
>>
>> OK, then you suggest to rename it pe_num_map or keep it as offset?
>>
>
> pe_num_map would be better.
+1. @offset is very confusing.
It could be a linked list actually, "struct list_head pe_list" in pci_dn
and "struct list_head next" in struct pnv_ioda_pe. I could not quickly
spot places where you would access this array outside a loop
for(i=0;i<num_vfs;++i).
--
Alexey
prev parent reply other threads:[~2015-08-07 10:00 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-29 7:22 [PATCH] powerpc/powernv: use one M64 BAR in Single PE mode for one VF BAR Wei Yang
2015-07-30 1:15 ` Gavin Shan
2015-07-30 5:43 ` Wei Yang
2015-07-31 0:13 ` Gavin Shan
2015-07-31 2:01 ` Wei Yang
2015-08-05 1:24 ` [PATCH V2 0/6] Redesign SR-IOV on PowerNV Wei Yang
2015-08-05 1:24 ` [PATCH V2 1/6] powerpc/powernv: don't enable SRIOV when VF BAR contains non M64 BAR Wei Yang
2015-08-06 4:35 ` Gavin Shan
2015-08-06 6:10 ` Alexey Kardashevskiy
2015-08-06 6:57 ` Gavin Shan
2015-08-06 7:47 ` Alexey Kardashevskiy
2015-08-06 11:07 ` Gavin Shan
2015-08-06 14:13 ` Wei Yang
2015-08-07 1:24 ` Alexey Kardashevskiy
2015-08-06 14:10 ` Wei Yang
2015-08-07 1:20 ` Gavin Shan
2015-08-07 2:24 ` Wei Yang
2015-08-07 3:50 ` Gavin Shan
2015-08-07 7:14 ` Alexey Kardashevskiy
2015-08-10 1:40 ` Wei Yang
2015-08-05 1:24 ` [PATCH V2 2/6] powerpc/powernv: simplify the calculation of iov resource Wei Yang
2015-08-06 4:51 ` Gavin Shan
2015-08-06 9:00 ` Alexey Kardashevskiy
2015-08-06 9:41 ` Wei Yang
2015-08-06 10:15 ` Alexey Kardashevskiy
2015-08-07 1:36 ` Wei Yang
2015-08-06 13:49 ` Wei Yang
2015-08-07 1:08 ` Gavin Shan
2015-08-05 1:25 ` [PATCH V2 3/6] powerpc/powernv: use one M64 BAR in Single PE mode for one VF BAR Wei Yang
2015-08-06 5:20 ` Gavin Shan
2015-08-06 9:36 ` Wei Yang
2015-08-06 10:07 ` Gavin Shan
2015-08-07 1:48 ` Wei Yang
2015-08-07 8:13 ` Alexey Kardashevskiy
2015-08-06 10:04 ` Alexey Kardashevskiy
2015-08-07 2:01 ` Wei Yang
2015-08-07 8:59 ` Alexey Kardashevskiy
2015-08-10 1:48 ` Wei Yang
2015-08-05 1:25 ` [PATCH V2 4/6] powerpc/powernv: replace the hard coded boundary with gate Wei Yang
2015-08-06 5:26 ` Gavin Shan
2015-08-07 9:11 ` Alexey Kardashevskiy
2015-08-05 1:25 ` [PATCH V2 5/6] powerpc/powernv: boundary the total vf bar size instead of the individual one Wei Yang
2015-08-06 5:28 ` Gavin Shan
2015-08-06 14:03 ` Wei Yang
2015-08-07 1:23 ` Gavin Shan
2015-08-07 2:25 ` Wei Yang
2015-08-05 1:25 ` [PATCH V2 6/6] powerpc/powernv: allocate discrete PE# when using M64 BAR in Single PE mode Wei Yang
2015-08-06 5:36 ` Gavin Shan
2015-08-06 13:41 ` Wei Yang
2015-08-07 1:36 ` Gavin Shan
2015-08-07 2:33 ` Wei Yang
2015-08-07 3:43 ` Gavin Shan
2015-08-07 5:44 ` Wei Yang
2015-08-07 5:54 ` Gavin Shan
2015-08-07 6:25 ` Wei Yang
2015-08-07 10:00 ` Alexey Kardashevskiy [this message]
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