PCI: dwc: Remove storing of PCI resources

The PCI bridge resources are stored in pci_host_bridge.windows, so
there's no need to store them in a DWC specific struct. There's also no
need to parse the resources and store them a 2nd time as they are mainly
used for one time setup of iATU windows.

Link: https://lore.kernel.org/r/20200821035420.380495-19-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Jonathan Chocron <jonnyc@amazon.com>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>

Author: robherring

drivers/pci/controller/dwc/pci-keystone.c

@@ -400,10 +400,14 @@ static void ks_pcie_setup_rc_app_regs(struct keystone_pcie *ks_pcie)
 	u32 num_viewport = ks_pcie->num_viewport;
 	struct dw_pcie *pci = ks_pcie->pci;
 	struct pcie_port *pp = &pci->pp;
-	u64 start = pp->mem->start;
-	u64 end = pp->mem->end;
+	u64 start, end;
+	struct resource *mem;
 	int i;
 
+	mem = resource_list_first_type(&pp->bridge->windows, IORESOURCE_MEM)->res;
+	start = mem->start;
+	end = mem->end;
+
 	/* Disable BARs for inbound access */
 	ks_pcie_set_dbi_mode(ks_pcie);
 	dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0);

drivers/pci/controller/dwc/pcie-al.c

@@ -260,6 +260,7 @@ static void al_pcie_config_prepare(struct al_pcie *pcie)
 	u8 secondary_bus;
 	u32 cfg_control;
 	u32 reg;
+	struct resource *bus = resource_list_first_type(&pp->bridge->windows, IORESOURCE_BUS)->res;
 
 	target_bus_cfg = &pcie->target_bus_cfg;
 
@@ -273,13 +274,13 @@ static void al_pcie_config_prepare(struct al_pcie *pcie)
 	target_bus_cfg->ecam_mask = ecam_bus_mask;
 	/* This portion is taken from the cfg_target_bus reg */
 	target_bus_cfg->reg_mask = ~target_bus_cfg->ecam_mask;
-	target_bus_cfg->reg_val = pp->busn->start & target_bus_cfg->reg_mask;
+	target_bus_cfg->reg_val = bus->start & target_bus_cfg->reg_mask;
 
 	al_pcie_target_bus_set(pcie, target_bus_cfg->reg_val,
 			       target_bus_cfg->reg_mask);
 
-	secondary_bus = pp->busn->start + 1;
-	subordinate_bus = pp->busn->end;
+	secondary_bus = bus->start + 1;
+	subordinate_bus = bus->end;
 
 	/* Set the valid values of secondary and subordinate buses */
 	cfg_control_offset = AXI_BASE_OFFSET + pcie->reg_offsets.ob_ctrl +

drivers/pci/controller/dwc/pcie-designware-host.c

@@ -326,17 +326,9 @@ int dw_pcie_host_init(struct pcie_port *pp)
 	resource_list_for_each_entry(win, &bridge->windows) {
 		switch (resource_type(win->res)) {
 		case IORESOURCE_IO:
-			pp->io = win->res;
-			pp->io->name = "I/O";
-			pp->io_size = resource_size(pp->io);
-			pp->io_bus_addr = pp->io->start - win->offset;
-			pp->io_base = pci_pio_to_address(pp->io->start);
-			break;
-		case IORESOURCE_MEM:
-			pp->mem = win->res;
-			pp->mem->name = "MEM";
-			pp->mem_size = resource_size(pp->mem);
-			pp->mem_bus_addr = pp->mem->start - win->offset;
+			pp->io_size = resource_size(win->res);
+			pp->io_bus_addr = win->res->start - win->offset;
+			pp->io_base = pci_pio_to_address(win->res->start);
 			break;
 		case 0:
 			pp->cfg = win->res;
@@ -345,9 +337,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
 			pp->cfg0_base = pp->cfg->start;
 			pp->cfg1_base = pp->cfg->start + pp->cfg0_size;
 			break;
-		case IORESOURCE_BUS:
-			pp->busn = win->res;
-			break;
 		}
 	}
 
@@ -361,8 +350,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
 		}
 	}
 
-	pp->mem_base = pp->mem->start;
-
 	if (!pp->va_cfg0_base) {
 		pp->va_cfg0_base = devm_pci_remap_cfgspace(dev,
 					pp->cfg0_base, pp->cfg0_size);
@@ -602,9 +589,13 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
 	 * ATU, so we should not program the ATU here.
 	 */
 	if (pp->bridge->child_ops == &dw_child_pcie_ops) {
+		struct resource_entry *entry =
+			resource_list_first_type(&pp->bridge->windows, IORESOURCE_MEM);
+
 		dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX0,
-					  PCIE_ATU_TYPE_MEM, pp->mem_base,
-					  pp->mem_bus_addr, pp->mem_size);
+					  PCIE_ATU_TYPE_MEM, entry->res->start,
+					  entry->res->start - entry->offset,
+					  resource_size(entry->res));
 		if (pci->num_viewport > 2)
 			dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX2,
 						  PCIE_ATU_TYPE_IO, pp->io_base,

drivers/pci/controller/dwc/pcie-designware.h

@@ -175,13 +175,7 @@ struct pcie_port {
 	resource_size_t		io_base;
 	phys_addr_t		io_bus_addr;
 	u32			io_size;
-	u64			mem_base;
-	phys_addr_t		mem_bus_addr;
-	u32			mem_size;
 	struct resource		*cfg;
-	struct resource		*io;
-	struct resource		*mem;
-	struct resource		*busn;
 	int			irq;
 	const struct dw_pcie_host_ops *ops;
 	int			msi_irq;