nagai/kernel
3
0
Fork 0
forked from mirrors/linux
Code Pull requests Activity

PCI: keystone: Cleanup outbound window configuration

Browse source 
Outbound translation window is configured in order to access the
PCIe card's MEM space. Cleanup outbound translation configuration
here by using BIT() macros, adding a macro for window size and
using lower_32_bits/upper_32_bits macros for configuring the 64 bit
offset in the outbound translation region.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Kishon Vijay Abraham I 2018-10-17 13:11:08 +05:30 committed by Lorenzo Pieralisi
parent b4f1af8352
commit e75043ad97
1 changed files with 17 additions and 15 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

32
drivers/pci/controller/dwc/pci-keystone.c
View file

@ -41,7 +41,7 @@
#define LTSSM_STATE_MASK 0x1f
#define LTSSM_STATE_L0 0x11
#define DBI_CS2_EN_VAL 0x20
#define OB_XLAT_EN_VAL 2
#define OB_XLAT_EN_VAL BIT(1)
/* Application registers */
#define CMD_STATUS 0x004
@ -53,10 +53,11 @@
#define CFG_TYPE1 BIT(24)
#define OB_SIZE 0x030
#define CFG_PCIM_WIN_SZ_IDX 3
#define SPACE0_REMOTE_CFG_OFFSET 0x1000
#define OB_OFFSET_INDEX(n) (0x200 + (8 * (n)))
#define OB_OFFSET_HI(n) (0x204 + (8 * (n)))
#define OB_ENABLEN BIT(0)
#define OB_WIN_SIZE 8 /* 8MB */
/* IRQ register defines */
#define IRQ_EOI 0x050
@ -341,12 +342,13 @@ static void ks_pcie_clear_dbi_mode(struct keystone_pcie *ks_pcie)
static void ks_pcie_setup_rc_app_regs(struct keystone_pcie *ks_pcie)
{
u32 val;
u32 num_viewport = ks_pcie->num_viewport;
struct dw_pcie *pci = ks_pcie->pci;
struct pcie_port *pp = &pci->pp;
u32 start = pp->mem->start, end = pp->mem->end;
int i, tr_size;
u32 val;
u64 start = pp->mem->start;
u64 end = pp->mem->end;
int i;
/* Disable BARs for inbound access */
ks_pcie_set_dbi_mode(ks_pcie);
@ -354,21 +356,21 @@ static void ks_pcie_setup_rc_app_regs(struct keystone_pcie *ks_pcie)
dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_1, 0);
ks_pcie_clear_dbi_mode(ks_pcie);
/* Set outbound translation size per window division */
ks_pcie_app_writel(ks_pcie, OB_SIZE, CFG_PCIM_WIN_SZ_IDX & 0x7);
tr_size = (1 << (CFG_PCIM_WIN_SZ_IDX & 0x7)) * SZ_1M;
val = ilog2(OB_WIN_SIZE);
ks_pcie_app_writel(ks_pcie, OB_SIZE, val);
/* Using Direct 1:1 mapping of RC <-> PCI memory space */
for (i = 0; (i < num_viewport) && (start < end); i++) {
ks_pcie_app_writel(ks_pcie, OB_OFFSET_INDEX(i), start | 1);
ks_pcie_app_writel(ks_pcie, OB_OFFSET_HI(i), 0);
start += tr_size;
for (i = 0; i < num_viewport && (start < end); i++) {
ks_pcie_app_writel(ks_pcie, OB_OFFSET_INDEX(i),
lower_32_bits(start) | OB_ENABLEN);
ks_pcie_app_writel(ks_pcie, OB_OFFSET_HI(i),
upper_32_bits(start));
start += OB_WIN_SIZE;
}
/* Enable OB translation */
val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
ks_pcie_app_writel(ks_pcie, CMD_STATUS, OB_XLAT_EN_VAL | val);
val |= OB_XLAT_EN_VAL;
ks_pcie_app_writel(ks_pcie, CMD_STATUS, val);
}
static int ks_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,