From mboxrd@z Thu Jan 1 00:00:00 1970 From: lorenzo.pieralisi@arm.com (Lorenzo Pieralisi) Date: Thu, 2 Mar 2017 12:05:46 +0000 Subject: [PATCH 07/20] PCI: implement Devres interface to map PCI config space In-Reply-To: References: <20170227151436.18698-1-lorenzo.pieralisi@arm.com> <20170227151436.18698-8-lorenzo.pieralisi@arm.com> Message-ID: <20170302120546.GB17277@red-moon> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Andy, On Thu, Mar 02, 2017 at 01:54:42AM +0200, Andy Shevchenko wrote: > On Mon, Feb 27, 2017 at 5:14 PM, Lorenzo Pieralisi > wrote: > > The introduction of the pci_remap_cfgspace() interface allows > > PCI host controller drivers to map PCI config space through a > > dedicated kernel interface. Current PCI host controller drivers > > use the devm_ioremap_* Devres interfaces to map PCI configuration > > space regions so in order to update them to the new > > pci_remap_cfgspace() mapping interface a new set of Devres interfaces > > should be implemented so that PCI host controller drivers can make > > use of them. > > > > Introduce two new functions in the PCI kernel layer and Devres > > documentation: > > > > - devm_pci_remap_cfgspace() > > - devm_pci_remap_cfg_resource() > > > > so that PCI host controller drivers can make use of them to map > > PCI configuration space regions. > > Wouldn't you like to be consistent with current PCI API, i.e.: > 1. devm_*() functions called pcim_*() in PCI. I thought about that and did not do it because here we are remapping resources that are _not_ PCI bus resources (ie it is not PCI BARs we are remapping), keeping the devm_* prefix would be more consistent to the typical device drivers remapping functions pattern (ie a typical PCI host controller driver would mix devm_ and pcim_ calls which is a bit hard to parse), that was my rationale. I am not too fussed about that either way, I am happy to update it to pcim_* though, it is Bjorn/Arnd's decision. > 2. If you may notice there is no separate pcim_*map*() stuff, they are > dynamically adapting to the case. I do not understand what you mean here I would ask you to elaborate a bit more please so that I can do something about it. Thanks ! Lorenzo