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 -- 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
