mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-12 05:24:12 +08:00
5a32c3413d
- rework the non-coherent DMA allocator - move private definitions out of <linux/dma-mapping.h> - lower CMA_ALIGNMENT (Paul Cercueil) - remove the omap1 dma address translation in favor of the common code - make dma-direct aware of multiple dma offset ranges (Jim Quinlan) - support per-node DMA CMA areas (Barry Song) - increase the default seg boundary limit (Nicolin Chen) - misc fixes (Robin Murphy, Thomas Tai, Xu Wang) - various cleanups -----BEGIN PGP SIGNATURE----- iQI/BAABCgApFiEEgdbnc3r/njty3Iq9D55TZVIEUYMFAl+IiPwLHGhjaEBsc3Qu ZGUACgkQD55TZVIEUYPKEQ//TM8vxjucnRl/pklpMin49dJorwiVvROLhQqLmdxw 286ZKpVzYYAPc7LnNqwIBugnFZiXuHu8xPKQkIiOa2OtNDTwhKNoBxOAmOJaV6DD 8JfEtZYeX5mKJ/Nqd2iSkIqOvCwZ9Wzii+aytJ2U88wezQr1fnyF4X49MegETEey FHWreSaRWZKa0MMRu9AQ0QxmoNTHAQUNaPc0PeqEtPULybfkGOGw4/ghSB7WcKrA gtKTuooNOSpVEHkTas2TMpcBp6lxtOjFqKzVN0ml+/nqq5NeTSDx91VOCX/6Cj76 mXIg+s7fbACTk/BmkkwAkd0QEw4fo4tyD6Bep/5QNhvEoAriTuSRbhvLdOwFz0EF vhkF0Rer6umdhSK7nPd7SBqn8kAnP4vBbdmB68+nc3lmkqysLyE4VkgkdH/IYYQI 6TJ0oilXWFmU6DT5Rm4FBqCvfcEfU2dUIHJr5wZHqrF2kLzoZ+mpg42fADoG4GuI D/oOsz7soeaRe3eYfWybC0omGR6YYPozZJ9lsfftcElmwSsFrmPsbO1DM5IBkj1B gItmEbOB9ZK3RhIK55T/3u1UWY3Uc/RVr+kchWvADGrWnRQnW0kxYIqDgiOytLFi JZNH8uHpJIwzoJAv6XXSPyEUBwXTG+zK37Ce769HGbUEaUrE71MxBbQAQsK8mDpg 7fM= =Bkf/ -----END PGP SIGNATURE----- Merge tag 'dma-mapping-5.10' of git://git.infradead.org/users/hch/dma-mapping Pull dma-mapping updates from Christoph Hellwig: - rework the non-coherent DMA allocator - move private definitions out of <linux/dma-mapping.h> - lower CMA_ALIGNMENT (Paul Cercueil) - remove the omap1 dma address translation in favor of the common code - make dma-direct aware of multiple dma offset ranges (Jim Quinlan) - support per-node DMA CMA areas (Barry Song) - increase the default seg boundary limit (Nicolin Chen) - misc fixes (Robin Murphy, Thomas Tai, Xu Wang) - various cleanups * tag 'dma-mapping-5.10' of git://git.infradead.org/users/hch/dma-mapping: (63 commits) ARM/ixp4xx: add a missing include of dma-map-ops.h dma-direct: simplify the DMA_ATTR_NO_KERNEL_MAPPING handling dma-direct: factor out a dma_direct_alloc_from_pool helper dma-direct check for highmem pages in dma_direct_alloc_pages dma-mapping: merge <linux/dma-noncoherent.h> into <linux/dma-map-ops.h> dma-mapping: move large parts of <linux/dma-direct.h> to kernel/dma dma-mapping: move dma-debug.h to kernel/dma/ dma-mapping: remove <asm/dma-contiguous.h> dma-mapping: merge <linux/dma-contiguous.h> into <linux/dma-map-ops.h> dma-contiguous: remove dma_contiguous_set_default dma-contiguous: remove dev_set_cma_area dma-contiguous: remove dma_declare_contiguous dma-mapping: split <linux/dma-mapping.h> cma: decrease CMA_ALIGNMENT lower limit to 2 firewire-ohci: use dma_alloc_pages dma-iommu: implement ->alloc_noncoherent dma-mapping: add new {alloc,free}_noncoherent dma_map_ops methods dma-mapping: add a new dma_alloc_pages API dma-mapping: remove dma_cache_sync 53c700: convert to dma_alloc_noncoherent ...
251 lines
6.4 KiB
C
251 lines
6.4 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com>
|
|
* Copyright (C) 2000, 2001 Ralf Baechle <ralf@gnu.org>
|
|
* Copyright (C) 2005 Ilya A. Volynets-Evenbakh <ilya@total-knowledge.com>
|
|
* swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
|
|
* IP32 changes by Ilya.
|
|
* Copyright (C) 2010 Cavium Networks, Inc.
|
|
*/
|
|
#include <linux/dma-direct.h>
|
|
#include <linux/memblock.h>
|
|
#include <linux/swiotlb.h>
|
|
#include <linux/types.h>
|
|
#include <linux/init.h>
|
|
#include <linux/mm.h>
|
|
|
|
#include <asm/bootinfo.h>
|
|
|
|
#include <asm/octeon/octeon.h>
|
|
|
|
#ifdef CONFIG_PCI
|
|
#include <linux/pci.h>
|
|
#include <asm/octeon/pci-octeon.h>
|
|
#include <asm/octeon/cvmx-npi-defs.h>
|
|
#include <asm/octeon/cvmx-pci-defs.h>
|
|
|
|
struct octeon_dma_map_ops {
|
|
dma_addr_t (*phys_to_dma)(struct device *dev, phys_addr_t paddr);
|
|
phys_addr_t (*dma_to_phys)(struct device *dev, dma_addr_t daddr);
|
|
};
|
|
|
|
static dma_addr_t octeon_hole_phys_to_dma(phys_addr_t paddr)
|
|
{
|
|
if (paddr >= CVMX_PCIE_BAR1_PHYS_BASE && paddr < (CVMX_PCIE_BAR1_PHYS_BASE + CVMX_PCIE_BAR1_PHYS_SIZE))
|
|
return paddr - CVMX_PCIE_BAR1_PHYS_BASE + CVMX_PCIE_BAR1_RC_BASE;
|
|
else
|
|
return paddr;
|
|
}
|
|
|
|
static phys_addr_t octeon_hole_dma_to_phys(dma_addr_t daddr)
|
|
{
|
|
if (daddr >= CVMX_PCIE_BAR1_RC_BASE)
|
|
return daddr + CVMX_PCIE_BAR1_PHYS_BASE - CVMX_PCIE_BAR1_RC_BASE;
|
|
else
|
|
return daddr;
|
|
}
|
|
|
|
static dma_addr_t octeon_gen1_phys_to_dma(struct device *dev, phys_addr_t paddr)
|
|
{
|
|
if (paddr >= 0x410000000ull && paddr < 0x420000000ull)
|
|
paddr -= 0x400000000ull;
|
|
return octeon_hole_phys_to_dma(paddr);
|
|
}
|
|
|
|
static phys_addr_t octeon_gen1_dma_to_phys(struct device *dev, dma_addr_t daddr)
|
|
{
|
|
daddr = octeon_hole_dma_to_phys(daddr);
|
|
|
|
if (daddr >= 0x10000000ull && daddr < 0x20000000ull)
|
|
daddr += 0x400000000ull;
|
|
|
|
return daddr;
|
|
}
|
|
|
|
static const struct octeon_dma_map_ops octeon_gen1_ops = {
|
|
.phys_to_dma = octeon_gen1_phys_to_dma,
|
|
.dma_to_phys = octeon_gen1_dma_to_phys,
|
|
};
|
|
|
|
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 const struct octeon_dma_map_ops octeon_gen2_ops = {
|
|
.phys_to_dma = octeon_gen2_phys_to_dma,
|
|
.dma_to_phys = octeon_gen2_dma_to_phys,
|
|
};
|
|
|
|
static dma_addr_t octeon_big_phys_to_dma(struct device *dev, phys_addr_t paddr)
|
|
{
|
|
if (paddr >= 0x410000000ull && paddr < 0x420000000ull)
|
|
paddr -= 0x400000000ull;
|
|
|
|
/* Anything in the BAR1 hole or above goes via BAR2 */
|
|
if (paddr >= 0xf0000000ull)
|
|
paddr = OCTEON_BAR2_PCI_ADDRESS + paddr;
|
|
|
|
return paddr;
|
|
}
|
|
|
|
static phys_addr_t octeon_big_dma_to_phys(struct device *dev, dma_addr_t daddr)
|
|
{
|
|
if (daddr >= OCTEON_BAR2_PCI_ADDRESS)
|
|
daddr -= OCTEON_BAR2_PCI_ADDRESS;
|
|
|
|
if (daddr >= 0x10000000ull && daddr < 0x20000000ull)
|
|
daddr += 0x400000000ull;
|
|
return daddr;
|
|
}
|
|
|
|
static const struct octeon_dma_map_ops octeon_big_ops = {
|
|
.phys_to_dma = octeon_big_phys_to_dma,
|
|
.dma_to_phys = octeon_big_dma_to_phys,
|
|
};
|
|
|
|
static dma_addr_t octeon_small_phys_to_dma(struct device *dev,
|
|
phys_addr_t paddr)
|
|
{
|
|
if (paddr >= 0x410000000ull && paddr < 0x420000000ull)
|
|
paddr -= 0x400000000ull;
|
|
|
|
/* Anything not in the BAR1 range goes via BAR2 */
|
|
if (paddr >= octeon_bar1_pci_phys && paddr < octeon_bar1_pci_phys + 0x8000000ull)
|
|
paddr = paddr - octeon_bar1_pci_phys;
|
|
else
|
|
paddr = OCTEON_BAR2_PCI_ADDRESS + paddr;
|
|
|
|
return paddr;
|
|
}
|
|
|
|
static phys_addr_t octeon_small_dma_to_phys(struct device *dev,
|
|
dma_addr_t daddr)
|
|
{
|
|
if (daddr >= OCTEON_BAR2_PCI_ADDRESS)
|
|
daddr -= OCTEON_BAR2_PCI_ADDRESS;
|
|
else
|
|
daddr += octeon_bar1_pci_phys;
|
|
|
|
if (daddr >= 0x10000000ull && daddr < 0x20000000ull)
|
|
daddr += 0x400000000ull;
|
|
return daddr;
|
|
}
|
|
|
|
static const struct octeon_dma_map_ops octeon_small_ops = {
|
|
.phys_to_dma = octeon_small_phys_to_dma,
|
|
.dma_to_phys = octeon_small_dma_to_phys,
|
|
};
|
|
|
|
static const struct octeon_dma_map_ops *octeon_pci_dma_ops;
|
|
|
|
void __init octeon_pci_dma_init(void)
|
|
{
|
|
switch (octeon_dma_bar_type) {
|
|
case OCTEON_DMA_BAR_TYPE_PCIE:
|
|
octeon_pci_dma_ops = &octeon_gen1_ops;
|
|
break;
|
|
case OCTEON_DMA_BAR_TYPE_PCIE2:
|
|
octeon_pci_dma_ops = &octeon_gen2_ops;
|
|
break;
|
|
case OCTEON_DMA_BAR_TYPE_BIG:
|
|
octeon_pci_dma_ops = &octeon_big_ops;
|
|
break;
|
|
case OCTEON_DMA_BAR_TYPE_SMALL:
|
|
octeon_pci_dma_ops = &octeon_small_ops;
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
}
|
|
#endif /* CONFIG_PCI */
|
|
|
|
dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
|
|
{
|
|
#ifdef CONFIG_PCI
|
|
if (dev && dev_is_pci(dev))
|
|
return octeon_pci_dma_ops->phys_to_dma(dev, paddr);
|
|
#endif
|
|
return paddr;
|
|
}
|
|
|
|
phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
|
|
{
|
|
#ifdef CONFIG_PCI
|
|
if (dev && dev_is_pci(dev))
|
|
return octeon_pci_dma_ops->dma_to_phys(dev, daddr);
|
|
#endif
|
|
return daddr;
|
|
}
|
|
|
|
char *octeon_swiotlb;
|
|
|
|
void __init plat_swiotlb_setup(void)
|
|
{
|
|
phys_addr_t start, end;
|
|
phys_addr_t max_addr;
|
|
phys_addr_t addr_size;
|
|
size_t swiotlbsize;
|
|
unsigned long swiotlb_nslabs;
|
|
u64 i;
|
|
|
|
max_addr = 0;
|
|
addr_size = 0;
|
|
|
|
for_each_mem_range(i, &start, &end) {
|
|
/* These addresses map low for PCI. */
|
|
if (start > 0x410000000ull && !OCTEON_IS_OCTEON2())
|
|
continue;
|
|
|
|
addr_size += (end - start);
|
|
|
|
if (max_addr < end)
|
|
max_addr = end;
|
|
}
|
|
|
|
swiotlbsize = PAGE_SIZE;
|
|
|
|
#ifdef CONFIG_PCI
|
|
/*
|
|
* For OCTEON_DMA_BAR_TYPE_SMALL, size the iotlb at 1/4 memory
|
|
* size to a maximum of 64MB
|
|
*/
|
|
if (OCTEON_IS_MODEL(OCTEON_CN31XX)
|
|
|| OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2)) {
|
|
swiotlbsize = addr_size / 4;
|
|
if (swiotlbsize > 64 * (1<<20))
|
|
swiotlbsize = 64 * (1<<20);
|
|
} else if (max_addr > 0xf0000000ul) {
|
|
/*
|
|
* Otherwise only allocate a big iotlb if there is
|
|
* memory past the BAR1 hole.
|
|
*/
|
|
swiotlbsize = 64 * (1<<20);
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_USB_OHCI_HCD_PLATFORM
|
|
/* OCTEON II ohci is only 32-bit. */
|
|
if (OCTEON_IS_OCTEON2() && 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;
|
|
|
|
octeon_swiotlb = memblock_alloc_low(swiotlbsize, PAGE_SIZE);
|
|
if (!octeon_swiotlb)
|
|
panic("%s: Failed to allocate %zu bytes align=%lx\n",
|
|
__func__, swiotlbsize, PAGE_SIZE);
|
|
|
|
if (swiotlb_init_with_tbl(octeon_swiotlb, swiotlb_nslabs, 1) == -ENOMEM)
|
|
panic("Cannot allocate SWIOTLB buffer");
|
|
}
|