On 2015/10/23 0:35, Bjorn Helgaas wrote: > Hi Gabriele, > > On Thu, Oct 22, 2015 at 07:21:41AM +0000, Gabriele Paoloni wrote: >>> -----Original Message----- >>> From: Bjorn Helgaas [mailto:helgaas@xxxxxxxxxx] > >>>> #define PCIECTRL_DRA7XX_CONF_PHY_CS 0x010C >>>> #define LINK_UP BIT(16) >>>> +#define CPU_TO_BUS_ADDR 0x0FFFFFFF >>> >>> "CPU_TO_BUS_ADDR" is a very generic name. Since you do have DRA7XX in >>> other #defines and static symbols in this file, maybe it could be DRA7XX to >>> make it obvious that it only applies here? >> >> Ok will change to DRA7XX_CPU_TO_BUS_ADRR in v12 >> .. > >>>> + if (pp->io_mod_base) >>>> + pp->io_mod_base &= CPU_TO_BUS_ADDR; >>> >>> These are equivalent to >>> >>> pp->io_mod_base &= CPU_TO_BUS_ADDR; >>> >>> (You don't need to test whether they're zero first.) >> >> Yes agreed, will change in v12 >> ... > >>>> cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config"); >>>> @@ -415,8 +411,7 @@ int dw_pcie_host_init(struct pcie_port *pp) >>>> pp->io_base = range.cpu_addr; >>>> >>>> /* Find the untranslated IO space address */ >>>> - pp->io_mod_base = of_read_number(parser.range - >>>> - parser.np + na, ns); >>>> + pp->io_mod_base = range.cpu_addr; >>> >>> So apparently >>> >>> "of_read_number() == range.cpu_addr & CPU_TO_BUS_ADDR" on DRA7xx >>> "of_read_number() == range.cpu_addr" everywhere else? >> >> Yes correct >> >>> Is that right? Is that a valid assumption, i.e., are we assuming >>> anything about DTs in the field that we shouldn't? >> >> Before I wrote a patch that was generic to accommodate intermediate level >> of translation between PCI_addr -> BUS_addr -> CPU_addr >> >> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-July/360922.html >> >> After discussion we agreed to solve it with a bitmask rather than adding >> a field to of_pci_range to make it generic. >> The bitmask only applies to DRA7xx > > I haven't gotten all the way through this series yet, but don't bother with > a v12 just for these minor changes. I can easily fix them up when applying > it. > > Bjorn > Hi Gabriele and Bjorn, Sorry for late, I am preparing v12 patchset and I will fix above problems together with other patches. Many thanks, Zhou > . > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
