Commit e8b5325c authored by Sergey Ryazanov's avatar Sergey Ryazanov Committed by Ralf Baechle
Browse files

MIPS: make PCI_DMA_BUS_IS_PHYS=1 constant 



No one of supported MIPS machines has an IOMMU unit, so we can safely define
PCI_DMA_BUS_IS_PHYS = 1. Also remove iommu flag from the pci controller
structure, since it is useless.

Signed-off-by: default avatarSergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Linux MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/7604/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 1e321fa9

arch/mips/include/asm/pci.h

+4 −6
Original line number Diff line number Diff line
@@ -43,8 +43,6 @@ struct pci_controller { 
	   and XFree86. Eventually will be removed. */

	unsigned int need_domain_info;



	int iommu;



	/* Optional access methods for reading/writing the bus number

	   of the PCI controller */

	int (*get_busno)(void);
@@ -106,11 +104,11 @@ static inline void pci_resource_to_user(const struct pci_dev *dev, int bar, 
struct pci_dev;



/*

 * The PCI address space does equal the physical memory address space.	The

 * networking and block device layers use this boolean for bounce buffer

 * decisions.  This is set if any hose does not have an IOMMU.

 * The PCI address space does equal the physical memory address space.

 * The networking and block device layers use this boolean for bounce

 * buffer decisions.

 */

extern unsigned int PCI_DMA_BUS_IS_PHYS;

#define PCI_DMA_BUS_IS_PHYS     (1)



#ifdef CONFIG_PCI_DOMAINS

#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index

arch/mips/kernel/setup.c

+0 −7
Original line number Diff line number Diff line
@@ -51,13 +51,6 @@ EXPORT_SYMBOL(cpu_data); 
struct screen_info screen_info;

#endif



/*

 * Despite it's name this variable is even if we don't have PCI

 */

unsigned int PCI_DMA_BUS_IS_PHYS;



EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS);



/*

 * Setup information

 *

arch/mips/pci/pci-ip32.c

+0 −1
Original line number Diff line number Diff line
@@ -116,7 +116,6 @@ static struct pci_controller mace_pci_controller = { 
	.pci_ops	= &mace_pci_ops,

	.mem_resource	= &mace_pci_mem_resource,

	.io_resource	= &mace_pci_io_resource,

	.iommu		= 0,

	.mem_offset	= MACE_PCI_MEM_OFFSET,

	.io_offset	= 0,

	.io_map_base	= CKSEG1ADDR(MACEPCI_LOW_IO),

arch/mips/pci/pci.c

+0 −3
Original line number Diff line number Diff line
@@ -83,9 +83,6 @@ static void pcibios_scanbus(struct pci_controller *hose) 
	LIST_HEAD(resources);

	struct pci_bus *bus;



	if (!hose->iommu)

		PCI_DMA_BUS_IS_PHYS = 1;



	if (hose->get_busno && pci_has_flag(PCI_PROBE_ONLY))

		next_busno = (*hose->get_busno)();

arch/mips/pnx833x/common/setup.c

+0 −3
Original line number Diff line number Diff line
@@ -38,9 +38,6 @@ extern void pnx833x_machine_power_off(void); 


int __init plat_mem_setup(void)

{

	/* fake pci bus to avoid bounce buffers */

	PCI_DMA_BUS_IS_PHYS = 1;



	/* set mips clock to 320MHz */

#if defined(CONFIG_SOC_PNX8335)

	PNX8335_WRITEFIELD(0x17, CLOCK_PLL_CPU_CTL, FREQ);

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