MIPS: Octeon: Update DMA mapping operations for OCTEON II processors.
OCTEON II has a new dma to phys mapping method for PCIe. Define
OCTEON_DMA_BAR_TYPE_PCIE2 to denote this case, and handle it.
OCTEON II also needs a swiotlb if the OHCI USB driver is enabled, so
allocate this too.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2983/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/cavium-octeon/dma-octeon.c b/arch/mips/cavium-octeon/dma-octeon.c
index ea4feba..b6bb92c 100644
--- a/arch/mips/cavium-octeon/dma-octeon.c
+++ b/arch/mips/cavium-octeon/dma-octeon.c
@@ -61,6 +61,16 @@
return daddr;
}
+static dma_addr_t octeon_gen2_phys_to_dma(struct device *dev, phys_addr_t paddr)
+{
+ return octeon_hole_phys_to_dma(paddr);
+}
+
+static phys_addr_t octeon_gen2_dma_to_phys(struct device *dev, dma_addr_t daddr)
+{
+ return octeon_hole_dma_to_phys(daddr);
+}
+
static dma_addr_t octeon_big_phys_to_dma(struct device *dev, phys_addr_t paddr)
{
if (paddr >= 0x410000000ull && paddr < 0x420000000ull)
@@ -262,11 +272,11 @@
for (i = 0 ; i < boot_mem_map.nr_map; i++) {
struct boot_mem_map_entry *e = &boot_mem_map.map[i];
- if (e->type != BOOT_MEM_RAM)
+ if (e->type != BOOT_MEM_RAM && e->type != BOOT_MEM_INIT_RAM)
continue;
/* These addresses map low for PCI. */
- if (e->addr > 0x410000000ull)
+ if (e->addr > 0x410000000ull && !OCTEON_IS_MODEL(OCTEON_CN6XXX))
continue;
addr_size += e->size;
@@ -296,6 +306,11 @@
swiotlbsize = 64 * (1<<20);
}
#endif
+#ifdef CONFIG_USB_OCTEON_OHCI
+ /* OCTEON II ohci is only 32-bit. */
+ if (OCTEON_IS_MODEL(OCTEON_CN6XXX) && max_addr >= 0x100000000ul)
+ swiotlbsize = 64 * (1<<20);
+#endif
swiotlb_nslabs = swiotlbsize >> IO_TLB_SHIFT;
swiotlb_nslabs = ALIGN(swiotlb_nslabs, IO_TLB_SEGSIZE);
swiotlbsize = swiotlb_nslabs << IO_TLB_SHIFT;
@@ -330,6 +345,10 @@
void __init octeon_pci_dma_init(void)
{
switch (octeon_dma_bar_type) {
+ case OCTEON_DMA_BAR_TYPE_PCIE2:
+ _octeon_pci_dma_map_ops.phys_to_dma = octeon_gen2_phys_to_dma;
+ _octeon_pci_dma_map_ops.dma_to_phys = octeon_gen2_dma_to_phys;
+ break;
case OCTEON_DMA_BAR_TYPE_PCIE:
_octeon_pci_dma_map_ops.phys_to_dma = octeon_gen1_phys_to_dma;
_octeon_pci_dma_map_ops.dma_to_phys = octeon_gen1_dma_to_phys;