From: Bjorn Helgaas <bhelgaas@google.com>
To: Jiang Liu <liuj97@gmail.com>, Yu Zhao <yu.zhao@intel.com>,
Dexuan Cui <dexuan.cui@intel.com>
Cc: Don Dutile <ddutile@redhat.com>, Yinghai Lu <yinghai@kernel.org>,
Taku Izumi <izumi.taku@jp.fujitsu.com>,
"Rafael J . Wysocki" <rjw@sisk.pl>,
Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>,
Yijing Wang <wangyijing@huawei.com>,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org
Subject: Re: [PATCH v3 00/32] provide interfaces to access PCIe capabilities registers
Date: Mon, 20 Aug 2012 16:13:54 -0600 [thread overview]
Message-ID: <CAErSpo5=OUM9veX8890USWegTG_Fhh10soxPJbjemd80bAO0qg@mail.gmail.com> (raw)
In-Reply-To: <CAErSpo6t9m0xmWkXfmONtbicjqLR_z5dLsjKCLWQfcktzRKkUA@mail.gmail.com>
On Mon, Aug 20, 2012 at 10:10 AM, Bjorn Helgaas <bhelgaas@google.com> wrote:
> So I'll try pulling your branch (I'll do something about the tsi721.c
> stuff myself).
I pulled this into
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git
pci/jiang-pcie-cap with the following changes:
- Dropped some "pci_" prefixes on internal functions in access.c
- Minor restructure of pcie_capability_read_*()
- Removed export of pcie_capability_reg_implemented()
- Reworked reset_intel_82599_sfp_virtfn() to check for FLR bit in
DEVCAP rather than using pcie_capability_reg_implemented()
- Split driver patches into one driver per patch
- Fixed myri10ge_toggle_relaxed() -- previous code returned useful
value, but your patch made it always return zero
- Use 16-bit, not 32-bit, accesses for DEVCTL, DEVCTL2 (tsi721)
I am still concerned about reset_intel_82599_sfp_virtfn(). It looks
wrong and possibly unnecessary. It looks wrong because it sets
PCI_EXP_DEVCTL_BCR_FLR and blindly clears all other bits in
PCI_EXP_DEVCTL. Most of the bits are probably cleared by the FLR
anyway, but Aux Power PM Enable is RWS ("sticky"), so it is *not*
modified by FLR. Therefore, using reset_intel_82599_sfp_virtfn() has
the probably unintended side effect of clearing Aux Power PM Enable.
It looks possibly unnecessary because the generic pcie_flr() does
essentially the same thing, so it's not clear why we need a special
case for 82599.
Yu or Dexuan, can you comment on these 82599 questions?
The proposed new code is here:
http://git.kernel.org/?p=linux/kernel/git/helgaas/pci.git;a=blob;f=drivers/pci/quirks.c;h=9abbf56e93fe5c98364a7dfe2b0b724047dfa4a9;hb=ef529bf0cb5606ff5bd1422d2d2700a821d8218b#l3082
Bjorn
next prev parent reply other threads:[~2012-08-20 22:14 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-01 15:54 [PATCH v3 00/32] provide interfaces to access PCIe capabilities registers Jiang Liu
2012-08-01 15:54 ` [PATCH v3 01/32] PCI: add pcie_flags_reg into struct pci_dev to cache PCIe capabilities register Jiang Liu
2012-08-01 15:54 ` [PATCH v3 02/32] PCI: introduce pci_pcie_type(dev) to replace pci_dev->pcie_type Jiang Liu
2012-08-01 15:54 ` [PATCH v3 03/32] PCI: remove unused field pcie_type from struct pci_dev Jiang Liu
2012-08-01 15:54 ` [PATCH v3 04/32] PCI: add PCIe capabilities access functions to hide differences among PCIe specs Jiang Liu
2012-08-01 15:54 ` [PATCH v3 05/32] PCI/core: use PCIe capabilities access functions to simplify implementation Jiang Liu
2012-08-01 15:54 ` [PATCH v3 06/32] PCI/hotplug: " Jiang Liu
2012-08-02 1:30 ` Kaneshige, Kenji
2012-08-01 15:54 ` [PATCH v3 07/32] PCI/portdrv: " Jiang Liu
2012-08-02 1:33 ` Kaneshige, Kenji
2012-08-01 15:54 ` [PATCH v3 08/32] PCI/pciehp: " Jiang Liu
2012-08-02 1:37 ` Kaneshige, Kenji
2012-08-01 15:54 ` [PATCH v3 09/32] PCI/PME: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 10/32] PCI/AER: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 11/32] PCI/ASPM: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 12/32] PCI/ARM: " Jiang Liu
2012-08-01 17:20 ` Stephen Warren
2012-08-02 5:58 ` Thierry Reding
2012-08-03 18:05 ` Stephen Warren
2012-08-01 15:54 ` [PATCH v3 13/32] PCI/MIPS: " Jiang Liu
2012-08-13 21:40 ` David Daney
2012-08-01 15:54 ` [PATCH v3 14/32] PCI/tile: " Jiang Liu
2012-08-01 21:07 ` Chris Metcalf
2012-08-01 15:54 ` [PATCH v3 15/32] PCI/r8169: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 16/32] PCI/broadcom: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 17/32] PCI/igb: " Jiang Liu
2012-08-02 22:12 ` Jeff Kirsher
2012-08-01 15:54 ` [PATCH v3 18/32] PCI/vxge: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 19/32] PCI/mlx4: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 20/32] PCI/niu: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 21/32] PCI/myri10ge: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 22/32] PCI/chelsio: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 23/32] PCI/atl1c: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 24/32] PCI/ath9k: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 25/32] PCI/iwl: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 26/32] PCI/mthca: " Jiang Liu
2012-08-02 21:46 ` Roland Dreier
2012-08-01 15:54 ` [PATCH v3 27/32] PCI/qib: " Jiang Liu
2012-08-01 17:30 ` Marciniszyn, Mike
2012-08-01 15:54 ` [PATCH v3 28/32] PCI/qla: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 29/32] PCI/radeon: " Jiang Liu
2012-08-01 16:04 ` Deucher, Alexander
2012-08-01 15:54 ` [PATCH v3 30/32] PCI/tsi721: " Jiang Liu
2012-08-09 14:16 ` Bounine, Alexandre
2012-08-01 15:54 ` [PATCH v3 31/32] PCI/et131x: " Jiang Liu
2012-08-01 15:54 ` [PATCH v3 32/32] PCI/rtl8192e: " Jiang Liu
2012-08-14 4:25 ` [PATCH v3 00/32] provide interfaces to access PCIe capabilities registers Bjorn Helgaas
2012-08-14 15:46 ` Jiang Liu
2012-08-20 15:26 ` Jiang Liu
2012-08-20 15:35 ` Bjorn Helgaas
2012-08-20 15:47 ` Jiang Liu
2012-08-20 16:10 ` Bjorn Helgaas
2012-08-20 22:13 ` Bjorn Helgaas [this message]
2012-08-21 4:40 ` Cui, Dexuan
2012-08-22 16:28 ` Bjorn Helgaas
2012-08-23 1:00 ` Cui, Dexuan
2012-08-23 1:51 ` Don Dutile
2012-08-21 15:59 ` Jiang Liu
2012-08-22 17:08 ` Bjorn Helgaas
2012-08-24 18:52 ` Bjorn Helgaas
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