diff options
Diffstat (limited to 'arch/powerpc/platforms/cell/spider-pci.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/spider-pci.c | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/arch/powerpc/platforms/cell/spider-pci.c b/arch/powerpc/platforms/cell/spider-pci.c deleted file mode 100644 index 68439445b1c3..000000000000 --- a/arch/powerpc/platforms/cell/spider-pci.c +++ /dev/null @@ -1,170 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * IO workarounds for PCI on Celleb/Cell platform - * - * (C) Copyright 2006-2007 TOSHIBA CORPORATION - */ - -#undef DEBUG - -#include <linux/kernel.h> -#include <linux/of_address.h> -#include <linux/slab.h> -#include <linux/io.h> - -#include <asm/ppc-pci.h> -#include <asm/pci-bridge.h> -#include <asm/io-workarounds.h> - -#define SPIDER_PCI_DISABLE_PREFETCH - -struct spiderpci_iowa_private { - void __iomem *regs; -}; - -static void spiderpci_io_flush(struct iowa_bus *bus) -{ - struct spiderpci_iowa_private *priv; - - priv = bus->private; - in_be32(priv->regs + SPIDER_PCI_DUMMY_READ); - iosync(); -} - -#define SPIDER_PCI_MMIO_READ(name, ret) \ -static ret spiderpci_##name(const PCI_IO_ADDR addr) \ -{ \ - ret val = __do_##name(addr); \ - spiderpci_io_flush(iowa_mem_find_bus(addr)); \ - return val; \ -} - -#define SPIDER_PCI_MMIO_READ_STR(name) \ -static void spiderpci_##name(const PCI_IO_ADDR addr, void *buf, \ - unsigned long count) \ -{ \ - __do_##name(addr, buf, count); \ - spiderpci_io_flush(iowa_mem_find_bus(addr)); \ -} - -SPIDER_PCI_MMIO_READ(readb, u8) -SPIDER_PCI_MMIO_READ(readw, u16) -SPIDER_PCI_MMIO_READ(readl, u32) -SPIDER_PCI_MMIO_READ(readq, u64) -SPIDER_PCI_MMIO_READ(readw_be, u16) -SPIDER_PCI_MMIO_READ(readl_be, u32) -SPIDER_PCI_MMIO_READ(readq_be, u64) -SPIDER_PCI_MMIO_READ_STR(readsb) -SPIDER_PCI_MMIO_READ_STR(readsw) -SPIDER_PCI_MMIO_READ_STR(readsl) - -static void spiderpci_memcpy_fromio(void *dest, const PCI_IO_ADDR src, - unsigned long n) -{ - __do_memcpy_fromio(dest, src, n); - spiderpci_io_flush(iowa_mem_find_bus(src)); -} - -static int __init spiderpci_pci_setup_chip(struct pci_controller *phb, - void __iomem *regs) -{ - void *dummy_page_va; - dma_addr_t dummy_page_da; - -#ifdef SPIDER_PCI_DISABLE_PREFETCH - u32 val = in_be32(regs + SPIDER_PCI_VCI_CNTL_STAT); - pr_debug("SPIDER_IOWA:PVCI_Control_Status was 0x%08x\n", val); - out_be32(regs + SPIDER_PCI_VCI_CNTL_STAT, val | 0x8); -#endif /* SPIDER_PCI_DISABLE_PREFETCH */ - - /* setup dummy read */ - /* - * On CellBlade, we can't know that which XDR memory is used by - * kmalloc() to allocate dummy_page_va. - * In order to improve the performance, the XDR which is used to - * allocate dummy_page_va is the nearest the spider-pci. - * We have to select the CBE which is the nearest the spider-pci - * to allocate memory from the best XDR, but I don't know that - * how to do. - * - * Celleb does not have this problem, because it has only one XDR. - */ - dummy_page_va = kmalloc(PAGE_SIZE, GFP_KERNEL); - if (!dummy_page_va) { - pr_err("SPIDERPCI-IOWA:Alloc dummy_page_va failed.\n"); - return -1; - } - - dummy_page_da = dma_map_single(phb->parent, dummy_page_va, - PAGE_SIZE, DMA_FROM_DEVICE); - if (dma_mapping_error(phb->parent, dummy_page_da)) { - pr_err("SPIDER-IOWA:Map dummy page filed.\n"); - kfree(dummy_page_va); - return -1; - } - - out_be32(regs + SPIDER_PCI_DUMMY_READ_BASE, dummy_page_da); - - return 0; -} - -int __init spiderpci_iowa_init(struct iowa_bus *bus, void *data) -{ - void __iomem *regs = NULL; - struct spiderpci_iowa_private *priv; - struct device_node *np = bus->phb->dn; - struct resource r; - unsigned long offset = (unsigned long)data; - - pr_debug("SPIDERPCI-IOWA:Bus initialize for spider(%pOF)\n", - np); - - priv = kzalloc(sizeof(*priv), GFP_KERNEL); - if (!priv) { - pr_err("SPIDERPCI-IOWA:" - "Can't allocate struct spiderpci_iowa_private"); - return -1; - } - - if (of_address_to_resource(np, 0, &r)) { - pr_err("SPIDERPCI-IOWA:Can't get resource.\n"); - goto error; - } - - regs = ioremap(r.start + offset, SPIDER_PCI_REG_SIZE); - if (!regs) { - pr_err("SPIDERPCI-IOWA:ioremap failed.\n"); - goto error; - } - priv->regs = regs; - bus->private = priv; - - if (spiderpci_pci_setup_chip(bus->phb, regs)) - goto error; - - return 0; - -error: - kfree(priv); - bus->private = NULL; - - if (regs) - iounmap(regs); - - return -1; -} - -struct ppc_pci_io spiderpci_ops = { - .readb = spiderpci_readb, - .readw = spiderpci_readw, - .readl = spiderpci_readl, - .readq = spiderpci_readq, - .readw_be = spiderpci_readw_be, - .readl_be = spiderpci_readl_be, - .readq_be = spiderpci_readq_be, - .readsb = spiderpci_readsb, - .readsw = spiderpci_readsw, - .readsl = spiderpci_readsl, - .memcpy_fromio = spiderpci_memcpy_fromio, -}; - |