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Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm

Browse Source 
Pull ARM updates (part one) from Russell King:

 - MMC patches from Ulf Hansson and Pawel Moll.  These add support for
   DDR mode and the latest variant found on ARM Versatile Express, as
   well as a number of cleanups.

 - A fix for to improve the behaviour of ARMs sched_clock()

 - Changes to the ARM ioremap() code.  I'm not convinced with the
   primary arguments for this, but it's been around for a while, and
   people seem happy with it - and the "other" justification for this is
   at

      http://lkml.org/lkml/2012/12/6/184

 - Add SCHED_HRTICK to ARMs Kconfig

 - Making the ARM SHA/AES code Thumb-2 compatible

 - A collection of other small updates.

* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (26 commits)
  ARM: add SCHED_HRTICK config option
  ARM: 7650/1: mm: replace direct access to mm->context.id with new macro
  ARM: 7649/1: mm: mm->context.id fix for big-endian
  ARM: 7648/1: pci: Allow passing per-controller private data
  ARM: 7647/1: pci: Keep pci_common_init() around after init
  ARM: fix warnings introduced by previous patch
  ARM: 7646/1: mm: use static_vm for managing static mapped areas
  ARM: 7645/1: ioremap: introduce an infrastructure for static mapped area
  ARM: 7644/1: vmregion: remove vmregion code entirely
  MAINTAINERS: Re-assert MMCI driver maintainer status
  MAINTAINERS: add additional file for MMCI driver
  MAINTAINERS: add maintainer entry for AMBA serial drivers
  ARM: 7637/1: memory: use SZ_ constants for defining the virtual memory layout
  ARM: 7643/1: sched: correct update_sched_clock()
  ARM: 7635/1: versatile: fix the PCI IRQ regression
  ARM: 7639/1: cache-l2x0: add missed dummy outer_resume entry
  ARM: 7630/1: mmc: mmci: Fixup and cleanup code for DMA handling
  ARM: 7632/1: spinlock: avoid exclusive accesses on unlock() path
  ARM: 7631/1: mmc: mmci: Add new VE MMCI variant
  ARM: 7623/1: mmc: mmci: Fixup clock gating when freq is 0 for ST-variants
  ...
This commit is contained in:
Linus Torvalds 2013-02-20 14:27:58 -08:00
commit 32f9aab8eb
26 changed files with 403 additions and 542 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
MAINTAINERS
View File

@ -670,8 +670,16 @@ F: drivers/input/serio/ambakmi.*
F: include/linux/amba/kmi.h
ARM PRIMECELL MMCI PL180/1 DRIVER
S: Orphan
M: Russell King <linux@arm.linux.org.uk>
S: Maintained
F: drivers/mmc/host/mmci.*
F: include/linux/amba/mmci.h
ARM PRIMECELL UART PL010 AND PL011 DRIVERS
M: Russell King <linux@arm.linux.org.uk>
S: Maintained
F: drivers/tty/serial/amba-pl01*.c
F: include/linux/amba/serial.h
ARM PRIMECELL BUS SUPPORT
M: Russell King <linux@arm.linux.org.uk>

3
arch/arm/Kconfig
View File

@ -1654,6 +1654,9 @@ config HZ
default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
default 100
config SCHED_HRTICK
def_bool HIGH_RES_TIMERS
config THUMB2_KERNEL
bool "Compile the kernel in Thumb-2 mode"
depends on CPU_V7 && !CPU_V6 && !CPU_V6K

64
arch/arm/crypto/aes-armv4.S
View File

@ -34,8 +34,9 @@
@ A little glue here to select the correct code below for the ARM CPU
@ that is being targetted.
#include <linux/linkage.h>
.text
.code 32
.type AES_Te,%object
.align 5
@ -145,10 +146,8 @@ AES_Te:
@ void AES_encrypt(const unsigned char *in, unsigned char *out,
@ const AES_KEY *key) {
.global AES_encrypt
.type AES_encrypt,%function
.align 5
AES_encrypt:
ENTRY(AES_encrypt)
sub r3,pc,#8 @ AES_encrypt
stmdb sp!,{r1,r4-r12,lr}
mov r12,r0 @ inp
@ -239,15 +238,8 @@ AES_encrypt:
strb r6,[r12,#14]
strb r3,[r12,#15]
#endif
#if __ARM_ARCH__>=5
ldmia sp!,{r4-r12,pc}
#else
ldmia sp!,{r4-r12,lr}
tst lr,#1
moveq pc,lr @ be binary compatible with V4, yet
.word 0xe12fff1e @ interoperable with Thumb ISA:-)
#endif
.size AES_encrypt,.-AES_encrypt
ENDPROC(AES_encrypt)
.type _armv4_AES_encrypt,%function
.align 2
@ -386,10 +378,8 @@ _armv4_AES_encrypt:
ldr pc,[sp],#4 @ pop and return
.size _armv4_AES_encrypt,.-_armv4_AES_encrypt
.global private_AES_set_encrypt_key
.type private_AES_set_encrypt_key,%function
.align 5
private_AES_set_encrypt_key:
ENTRY(private_AES_set_encrypt_key)
_armv4_AES_set_encrypt_key:
sub r3,pc,#8 @ AES_set_encrypt_key
teq r0,#0
@ -658,15 +648,11 @@ _armv4_AES_set_encrypt_key:
.Ldone: mov r0,#0
ldmia sp!,{r4-r12,lr}
.Labrt: tst lr,#1
moveq pc,lr @ be binary compatible with V4, yet
.word 0xe12fff1e @ interoperable with Thumb ISA:-)
.size private_AES_set_encrypt_key,.-private_AES_set_encrypt_key
.Labrt: mov pc,lr
ENDPROC(private_AES_set_encrypt_key)
.global private_AES_set_decrypt_key
.type private_AES_set_decrypt_key,%function
.align 5
private_AES_set_decrypt_key:
ENTRY(private_AES_set_decrypt_key)
str lr,[sp,#-4]! @ push lr
#if 0
@ kernel does both of these in setkey so optimise this bit out by
@ -748,15 +734,8 @@ private_AES_set_decrypt_key:
bne .Lmix
mov r0,#0
#if __ARM_ARCH__>=5
ldmia sp!,{r4-r12,pc}
#else
ldmia sp!,{r4-r12,lr}
tst lr,#1
moveq pc,lr @ be binary compatible with V4, yet
.word 0xe12fff1e @ interoperable with Thumb ISA:-)
#endif
.size private_AES_set_decrypt_key,.-private_AES_set_decrypt_key
ENDPROC(private_AES_set_decrypt_key)
.type AES_Td,%object
.align 5
@ -862,10 +841,8 @@ AES_Td:
@ void AES_decrypt(const unsigned char *in, unsigned char *out,
@ const AES_KEY *key) {
.global AES_decrypt
.type AES_decrypt,%function
.align 5
AES_decrypt:
ENTRY(AES_decrypt)
sub r3,pc,#8 @ AES_decrypt
stmdb sp!,{r1,r4-r12,lr}
mov r12,r0 @ inp
@ -956,15 +933,8 @@ AES_decrypt:
strb r6,[r12,#14]
strb r3,[r12,#15]
#endif
#if __ARM_ARCH__>=5
ldmia sp!,{r4-r12,pc}
#else
ldmia sp!,{r4-r12,lr}
tst lr,#1
moveq pc,lr @ be binary compatible with V4, yet
.word 0xe12fff1e @ interoperable with Thumb ISA:-)
#endif
.size AES_decrypt,.-AES_decrypt
ENDPROC(AES_decrypt)
.type _armv4_AES_decrypt,%function
.align 2
@ -1064,7 +1034,9 @@ _armv4_AES_decrypt:
and r9,lr,r1,lsr#8
ldrb r7,[r10,r7] @ Td4[s1>>0]
ldrb r1,[r10,r1,lsr#24] @ Td4[s1>>24]
ARM( ldrb r1,[r10,r1,lsr#24] ) @ Td4[s1>>24]
THUMB( add r1,r10,r1,lsr#24 ) @ Td4[s1>>24]
THUMB( ldrb r1,[r1] )
ldrb r8,[r10,r8] @ Td4[s1>>16]
eor r0,r7,r0,lsl#24
ldrb r9,[r10,r9] @ Td4[s1>>8]
@ -1077,7 +1049,9 @@ _armv4_AES_decrypt:
ldrb r8,[r10,r8] @ Td4[s2>>0]
and r9,lr,r2,lsr#16
ldrb r2,[r10,r2,lsr#24] @ Td4[s2>>24]
ARM( ldrb r2,[r10,r2,lsr#24] ) @ Td4[s2>>24]
THUMB( add r2,r10,r2,lsr#24 ) @ Td4[s2>>24]
THUMB( ldrb r2,[r2] )
eor r0,r0,r7,lsl#8
ldrb r9,[r10,r9] @ Td4[s2>>16]
eor r1,r8,r1,lsl#16
@ -1090,7 +1064,9 @@ _armv4_AES_decrypt:
and r9,lr,r3 @ i2
ldrb r9,[r10,r9] @ Td4[s3>>0]
ldrb r3,[r10,r3,lsr#24] @ Td4[s3>>24]
ARM( ldrb r3,[r10,r3,lsr#24] ) @ Td4[s3>>24]
THUMB( add r3,r10,r3,lsr#24 ) @ Td4[s3>>24]
THUMB( ldrb r3,[r3] )
eor r0,r0,r7,lsl#16
ldr r7,[r11,#0]
eor r1,r1,r8,lsl#8

24
arch/arm/crypto/sha1-armv4-large.S
View File

@ -51,13 +51,12 @@
@ Profiler-assisted and platform-specific optimization resulted in 10%
@ improvement on Cortex A8 core and 12.2 cycles per byte.
#include <linux/linkage.h>
.text
.global sha1_block_data_order
.type sha1_block_data_order,%function
.align 2
sha1_block_data_order:
ENTRY(sha1_block_data_order)
stmdb sp!,{r4-r12,lr}
add r2,r1,r2,lsl#6 @ r2 to point at the end of r1
ldmia r0,{r3,r4,r5,r6,r7}
@ -194,7 +193,7 @@ sha1_block_data_order:
eor r10,r10,r7,ror#2 @ F_00_19(B,C,D)
str r9,[r14,#-4]!
add r3,r3,r10 @ E+=F_00_19(B,C,D)
teq r14,sp
cmp r14,sp
bne .L_00_15 @ [((11+4)*5+2)*3]
#if __ARM_ARCH__<7
ldrb r10,[r1,#2]
@ -374,7 +373,9 @@ sha1_block_data_order:
@ F_xx_xx
add r3,r3,r9 @ E+=X[i]
add r3,r3,r10 @ E+=F_20_39(B,C,D)
teq r14,sp @ preserve carry
ARM( teq r14,sp ) @ preserve carry
THUMB( mov r11,sp )
THUMB( teq r14,r11 ) @ preserve carry
bne .L_20_39_or_60_79 @ [+((12+3)*5+2)*4]
bcs .L_done @ [+((12+3)*5+2)*4], spare 300 bytes
@ -466,7 +467,7 @@ sha1_block_data_order:
add r3,r3,r9 @ E+=X[i]
add r3,r3,r10 @ E+=F_40_59(B,C,D)
add r3,r3,r11,ror#2
teq r14,sp
cmp r14,sp
bne .L_40_59 @ [+((12+5)*5+2)*4]
ldr r8,.LK_60_79
@ -485,19 +486,12 @@ sha1_block_data_order:
teq r1,r2
bne .Lloop @ [+18], total 1307
#if __ARM_ARCH__>=5
ldmia sp!,{r4-r12,pc}
#else
ldmia sp!,{r4-r12,lr}
tst lr,#1
moveq pc,lr @ be binary compatible with V4, yet
.word 0xe12fff1e @ interoperable with Thumb ISA:-)
#endif
.align 2
.LK_00_19: .word 0x5a827999
.LK_20_39: .word 0x6ed9eba1
.LK_40_59: .word 0x8f1bbcdc
.LK_60_79: .word 0xca62c1d6
.size sha1_block_data_order,.-sha1_block_data_order
ENDPROC(sha1_block_data_order)
.asciz "SHA1 block transform for ARMv4, CRYPTOGAMS by <appro@openssl.org>"
.align 2

1
arch/arm/include/asm/mach/pci.h
View File

@ -23,6 +23,7 @@ struct hw_pci {
#endif
struct pci_ops *ops;
int nr_controllers;
void **private_data;
int (*setup)(int nr, struct pci_sys_data *);
struct pci_bus *(*scan)(int nr, struct pci_sys_data *);
void (*preinit)(void);

8
arch/arm/include/asm/memory.h
View File

@ -36,23 +36,23 @@
* TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area
*/
#define PAGE_OFFSET UL(CONFIG_PAGE_OFFSET)
#define TASK_SIZE (UL(CONFIG_PAGE_OFFSET) - UL(0x01000000))
#define TASK_SIZE (UL(CONFIG_PAGE_OFFSET) - UL(SZ_16M))
#define TASK_UNMAPPED_BASE ALIGN(TASK_SIZE / 3, SZ_16M)
/*
* The maximum size of a 26-bit user space task.
*/
#define TASK_SIZE_26 UL(0x04000000)
#define TASK_SIZE_26 (UL(1) << 26)
/*
* The module space lives between the addresses given by TASK_SIZE
* and PAGE_OFFSET - it must be within 32MB of the kernel text.
*/
#ifndef CONFIG_THUMB2_KERNEL
#define MODULES_VADDR (PAGE_OFFSET - 16*1024*1024)
#define MODULES_VADDR (PAGE_OFFSET - SZ_16M)
#else
/* smaller range for Thumb-2 symbols relocation (2^24)*/
#define MODULES_VADDR (PAGE_OFFSET - 8*1024*1024)
#define MODULES_VADDR (PAGE_OFFSET - SZ_8M)
#endif
#if TASK_SIZE > MODULES_VADDR

1
arch/arm/include/asm/outercache.h
View File

@ -92,6 +92,7 @@ static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
static inline void outer_flush_all(void) { }
static inline void outer_inv_all(void) { }
static inline void outer_disable(void) { }
static inline void outer_resume(void) { }
#endif

16
arch/arm/include/asm/spinlock.h
View File

@ -119,22 +119,8 @@ static inline int arch_spin_trylock(arch_spinlock_t *lock)
static inline void arch_spin_unlock(arch_spinlock_t *lock)
{
unsigned long tmp;
u32 slock;
smp_mb();
__asm__ __volatile__(
" mov %1, #1\n"
"1: ldrex %0, [%2]\n"
" uadd16 %0, %0, %1\n"
" strex %1, %0, [%2]\n"
" teq %1, #0\n"
" bne 1b"
: "=&r" (slock), "=&r" (tmp)
: "r" (&lock->slock)
: "cc");
lock->tickets.owner++;
dsb_sev();
}

9
arch/arm/kernel/bios32.c
View File

@ -413,7 +413,7 @@ static int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
return irq;
}
static int __init pcibios_init_resources(int busnr, struct pci_sys_data *sys)
static int pcibios_init_resources(int busnr, struct pci_sys_data *sys)
{
int ret;
struct pci_host_bridge_window *window;
@ -445,7 +445,7 @@ static int __init pcibios_init_resources(int busnr, struct pci_sys_data *sys)
return 0;
}
static void __init pcibios_init_hw(struct hw_pci *hw, struct list_head *head)
static void pcibios_init_hw(struct hw_pci *hw, struct list_head *head)
{
struct pci_sys_data *sys = NULL;
int ret;
@ -464,6 +464,9 @@ static void __init pcibios_init_hw(struct hw_pci *hw, struct list_head *head)
sys->map_irq = hw->map_irq;
INIT_LIST_HEAD(&sys->resources);
if (hw->private_data)
sys->private_data = hw->private_data[nr];
ret = hw->setup(nr, sys);
if (ret > 0) {
@ -493,7 +496,7 @@ static void __init pcibios_init_hw(struct hw_pci *hw, struct list_head *head)
}
}
void __init pci_common_init(struct hw_pci *hw)
void pci_common_init(struct hw_pci *hw)
{
struct pci_sys_data *sys;
LIST_HEAD(head);

4
arch/arm/kernel/sched_clock.c
View File

@ -93,11 +93,11 @@ static void notrace update_sched_clock(void)
* detectable in cyc_to_fixed_sched_clock().
*/
raw_local_irq_save(flags);
cd.epoch_cyc = cyc;
cd.epoch_cyc_copy = cyc;
smp_wmb();
cd.epoch_ns = ns;
smp_wmb();
cd.epoch_cyc_copy = cyc;
cd.epoch_cyc = cyc;
raw_local_irq_restore(flags);
}

31
arch/arm/kernel/smp.c
View File

@ -125,18 +125,6 @@ void __init smp_init_cpus(void)
smp_ops.smp_init_cpus();
}
static void __init platform_smp_prepare_cpus(unsigned int max_cpus)
{
if (smp_ops.smp_prepare_cpus)
smp_ops.smp_prepare_cpus(max_cpus);
}
static void __cpuinit platform_secondary_init(unsigned int cpu)
{
if (smp_ops.smp_secondary_init)
smp_ops.smp_secondary_init(cpu);
}
int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
{
if (smp_ops.smp_boot_secondary)
@ -154,12 +142,6 @@ static int platform_cpu_kill(unsigned int cpu)
return 1;
}
static void platform_cpu_die(unsigned int cpu)
{
if (smp_ops.cpu_die)
smp_ops.cpu_die(cpu);
}
static int platform_cpu_disable(unsigned int cpu)
{
if (smp_ops.cpu_disable)
@ -257,7 +239,8 @@ void __ref cpu_die(void)
* actual CPU shutdown procedure is at least platform (if not
* CPU) specific.
*/
platform_cpu_die(cpu);
if (smp_ops.cpu_die)
smp_ops.cpu_die(cpu);
/*
* Do not return to the idle loop - jump back to the secondary
@ -324,7 +307,8 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
/*
* Give the platform a chance to do its own initialisation.
*/
platform_secondary_init(cpu);
if (smp_ops.smp_secondary_init)
smp_ops.smp_secondary_init(cpu);
notify_cpu_starting(cpu);
@ -399,8 +383,8 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
/*
* Initialise the present map, which describes the set of CPUs
* actually populated at the present time. A platform should
* re-initialize the map in platform_smp_prepare_cpus() if
* present != possible (e.g. physical hotplug).
* re-initialize the map in the platforms smp_prepare_cpus()
* if present != possible (e.g. physical hotplug).
*/
init_cpu_present(cpu_possible_mask);
@ -408,7 +392,8 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
* Initialise the SCU if there are more than one CPU
* and let them know where to start.
*/
platform_smp_prepare_cpus(max_cpus);
if (smp_ops.smp_prepare_cpus)
smp_ops.smp_prepare_cpus(max_cpus);
}
}

15
arch/arm/mach-versatile/core.c
View File

@ -36,6 +36,7 @@
#include <linux/gfp.h>
#include <linux/clkdev.h>
#include <linux/mtd/physmap.h>
#include <linux/bitops.h>
#include <asm/irq.h>
#include <asm/hardware/arm_timer.h>
@ -65,16 +66,28 @@
#define VA_VIC_BASE __io_address(VERSATILE_VIC_BASE)
#define VA_SIC_BASE __io_address(VERSATILE_SIC_BASE)
/* These PIC IRQs are valid in each configuration */
#define PIC_VALID_ALL BIT(SIC_INT_KMI0) | BIT(SIC_INT_KMI1) | \
BIT(SIC_INT_SCI3) | BIT(SIC_INT_UART3) | \
BIT(SIC_INT_CLCD) | BIT(SIC_INT_TOUCH) | \
BIT(SIC_INT_KEYPAD) | BIT(SIC_INT_DoC) | \
BIT(SIC_INT_USB) | BIT(SIC_INT_PCI0) | \
BIT(SIC_INT_PCI1) | BIT(SIC_INT_PCI2) | \
BIT(SIC_INT_PCI3)
#if 1
#define IRQ_MMCI0A IRQ_VICSOURCE22
#define IRQ_AACI IRQ_VICSOURCE24
#define IRQ_ETH IRQ_VICSOURCE25
#define PIC_MASK 0xFFD00000
#define PIC_VALID PIC_VALID_ALL
#else
#define IRQ_MMCI0A IRQ_SIC_MMCI0A
#define IRQ_AACI IRQ_SIC_AACI
#define IRQ_ETH IRQ_SIC_ETH
#define PIC_MASK 0
#define PIC_VALID PIC_VALID_ALL | BIT(SIC_INT_MMCI0A) | \
BIT(SIC_INT_MMCI1A) | BIT(SIC_INT_AACI) | \
BIT(SIC_INT_ETH)
#endif
/* Lookup table for finding a DT node that represents the vic instance */
@ -102,7 +115,7 @@ void __init versatile_init_irq(void)
VERSATILE_SIC_BASE);
fpga_irq_init(VA_SIC_BASE, "SIC", IRQ_SIC_START,
IRQ_VICSOURCE31, ~PIC_MASK, np);
IRQ_VICSOURCE31, PIC_VALID, np);
/*
* Interrupts on secondary controller from 0 to 8 are routed to

11
arch/arm/mach-versatile/pci.c
View File

@ -23,6 +23,7 @@
#include <linux/io.h>
#include <mach/hardware.h>
#include <mach/irqs.h>
#include <asm/irq.h>
#include <asm/mach/pci.h>
@ -327,12 +328,12 @@ static int __init versatile_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
int irq;
/* slot, pin, irq
* 24 1 27
* 25 1 28
* 26 1 29
* 27 1 30
* 24 1 IRQ_SIC_PCI0
* 25 1 IRQ_SIC_PCI1
* 26 1 IRQ_SIC_PCI2
* 27 1 IRQ_SIC_PCI3
*/
irq = 27 + ((slot - 24 + pin - 1) & 3);
irq = IRQ_SIC_PCI0 + ((slot - 24 + pin - 1) & 3);
return irq;
}

2
arch/arm/mm/Makefile
View File

@ -6,7 +6,7 @@ obj-y := dma-mapping.o extable.o fault.o init.o \
iomap.o
obj-$(CONFIG_MMU) += fault-armv.o flush.o idmap.o ioremap.o \
mmap.o pgd.o mmu.o vmregion.o
mmap.o pgd.o mmu.o
ifneq ($(CONFIG_MMU),y)
obj-y += nommu.o

3
arch/arm/mm/context.c
View File

@ -34,6 +34,9 @@
* The ASID is used to tag entries in the CPU caches and TLBs.
* The context ID is used by debuggers and trace logic, and
* should be unique within all running processes.
*
* In big endian operation, the two 32 bit words are swapped if accesed by
* non 64-bit operations.
*/
#define ASID_FIRST_VERSION (1ULL << ASID_BITS)
#define NUM_USER_ASIDS (ASID_FIRST_VERSION - 1)

135
arch/arm/mm/ioremap.c
View File

@ -39,6 +39,70 @@
#include <asm/mach/pci.h>
#include "mm.h"
LIST_HEAD(static_vmlist);
static struct static_vm *find_static_vm_paddr(phys_addr_t paddr,
size_t size, unsigned int mtype)
{
struct static_vm *svm;
struct vm_struct *vm;
list_for_each_entry(svm, &static_vmlist, list) {
vm = &svm->vm;
if (!(vm->flags & VM_ARM_STATIC_MAPPING))
continue;
if ((vm->flags & VM_ARM_MTYPE_MASK) != VM_ARM_MTYPE(mtype))
continue;
if (vm->phys_addr > paddr ||
paddr + size - 1 > vm->phys_addr + vm->size - 1)
continue;
return svm;
}
return NULL;
}
struct static_vm *find_static_vm_vaddr(void *vaddr)
{
struct static_vm *svm;
struct vm_struct *vm;
list_for_each_entry(svm, &static_vmlist, list) {
vm = &svm->vm;
/* static_vmlist is ascending order */
if (vm->addr > vaddr)
break;
if (vm->addr <= vaddr && vm->addr + vm->size > vaddr)
return svm;
}
return NULL;
}
void __init add_static_vm_early(struct static_vm *svm)
{
struct static_vm *curr_svm;
struct vm_struct *vm;
void *vaddr;
vm = &svm->vm;
vm_area_add_early(vm);
vaddr = vm->addr;
list_for_each_entry(curr_svm, &static_vmlist, list) {
vm = &curr_svm->vm;
if (vm->addr > vaddr)
break;
}
list_add_tail(&svm->list, &curr_svm->list);
}
int ioremap_page(unsigned long virt, unsigned long phys,
const struct mem_type *mtype)
{
@ -197,13 +261,14 @@ void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn,
const struct mem_type *type;
int err;
unsigned long addr;
struct vm_struct * area;
struct vm_struct *area;
phys_addr_t paddr = __pfn_to_phys(pfn);
#ifndef CONFIG_ARM_LPAE
/*
* High mappings must be supersection aligned
*/
if (pfn >= 0x100000 && (__pfn_to_phys(pfn) & ~SUPERSECTION_MASK))
if (pfn >= 0x100000 && (paddr & ~SUPERSECTION_MASK))
return NULL;
#endif
@ -219,24 +284,16 @@ void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn,
/*
* Try to reuse one of the static mapping whenever possible.
*/
read_lock(&vmlist_lock);
for (area = vmlist; area; area = area->next) {
if (!size || (sizeof(phys_addr_t) == 4 && pfn >= 0x100000))
break;
if (!(area->flags & VM_ARM_STATIC_MAPPING))
continue;
if ((area->flags & VM_ARM_MTYPE_MASK) != VM_ARM_MTYPE(mtype))
continue;
if (__phys_to_pfn(area->phys_addr) > pfn ||
__pfn_to_phys(pfn) + size-1 > area->phys_addr + area->size-1)
continue;
/* we can drop the lock here as we know *area is static */
read_unlock(&vmlist_lock);
addr = (unsigned long)area->addr;
addr += __pfn_to_phys(pfn) - area->phys_addr;
return (void __iomem *) (offset + addr);
if (size && !(sizeof(phys_addr_t) == 4 && pfn >= 0x100000)) {
struct static_vm *svm;
svm = find_static_vm_paddr(paddr, size, mtype);
if (svm) {
addr = (unsigned long)svm->vm.addr;
addr += paddr - svm->vm.phys_addr;
return (void __iomem *) (offset + addr);
}
}
read_unlock(&vmlist_lock);
/*
* Don't allow RAM to be mapped - this causes problems with ARMv6+
@ -248,21 +305,21 @@ void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn,
if (!area)
return NULL;
addr = (unsigned long)area->addr;
area->phys_addr = __pfn_to_phys(pfn);
area->phys_addr = paddr;
#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE)
if (DOMAIN_IO == 0 &&
(((cpu_architecture() >= CPU_ARCH_ARMv6) && (get_cr() & CR_XP)) ||
cpu_is_xsc3()) && pfn >= 0x100000 &&
!((__pfn_to_phys(pfn) | size | addr) & ~SUPERSECTION_MASK)) {
!((paddr | size | addr) & ~SUPERSECTION_MASK)) {
area->flags |= VM_ARM_SECTION_MAPPING;
err = remap_area_supersections(addr, pfn, size, type);
} else if (!((__pfn_to_phys(pfn) | size | addr) & ~PMD_MASK)) {
} else if (!((paddr | size | addr) & ~PMD_MASK)) {
area->flags |= VM_ARM_SECTION_MAPPING;
err = remap_area_sections(addr, pfn, size, type);
} else
#endif
err = ioremap_page_range(addr, addr + size, __pfn_to_phys(pfn),
err = ioremap_page_range(addr, addr + size, paddr,
__pgprot(type->prot_pte));
if (err) {
@ -346,34 +403,28 @@ __arm_ioremap_exec(unsigned long phys_addr, size_t size, bool cached)
void __iounmap(volatile void __iomem *io_addr)
{
void *addr = (void *)(PAGE_MASK & (unsigned long)io_addr);
struct vm_struct *vm;
struct static_vm *svm;
/* If this is a static mapping, we must leave it alone */
svm = find_static_vm_vaddr(addr);
if (svm)
return;
read_lock(&vmlist_lock);
for (vm = vmlist; vm; vm = vm->next) {
if (vm->addr > addr)
break;
if (!(vm->flags & VM_IOREMAP))
continue;
/* If this is a static mapping we must leave it alone */
if ((vm->flags & VM_ARM_STATIC_MAPPING) &&
(vm->addr <= addr) && (vm->addr + vm->size > addr)) {
read_unlock(&vmlist_lock);
return;
}
#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE)
{
struct vm_struct *vm;
vm = find_vm_area(addr);
/*
* If this is a section based mapping we need to handle it
* specially as the VM subsystem does not know how to handle
* such a beast.
*/
if ((vm->addr == addr) &&
(vm->flags & VM_ARM_SECTION_MAPPING)) {
if (vm && (vm->flags & VM_ARM_SECTION_MAPPING))
unmap_area_sections((unsigned long)vm->addr, vm->size);
break;
}
#endif
}
read_unlock(&vmlist_lock);
#endif
vunmap(addr);
}

12
arch/arm/mm/mm.h
View File

@ -1,4 +1,6 @@
#ifdef CONFIG_MMU
#include <linux/list.h>
#include <linux/vmalloc.h>
/* the upper-most page table pointer */
extern pmd_t *top_pmd;
@ -65,6 +67,16 @@ extern void __flush_dcache_page(struct address_space *mapping, struct page *page
/* consistent regions used by dma_alloc_attrs() */
#define VM_ARM_DMA_CONSISTENT 0x20000000
struct static_vm {
struct vm_struct vm;
struct list_head list;
};
extern struct list_head static_vmlist;
extern struct static_vm *find_static_vm_vaddr(void *vaddr);
extern __init void add_static_vm_early(struct static_vm *svm);
#endif
#ifdef CONFIG_ZONE_DMA

36
arch/arm/mm/mmu.c
View File

@ -757,21 +757,24 @@ void __init iotable_init(struct map_desc *io_desc, int nr)
{
struct map_desc *md;
struct vm_struct *vm;
struct static_vm *svm;
if (!nr)
return;
vm = early_alloc_aligned(sizeof(*vm) * nr, __alignof__(*vm));
svm = early_alloc_aligned(sizeof(*svm) * nr, __alignof__(*svm));
for (md = io_desc; nr; md++, nr--) {
create_mapping(md);
vm = &svm->vm;
vm->addr = (void *)(md->virtual & PAGE_MASK);
vm->size = PAGE_ALIGN(md->length + (md->virtual & ~PAGE_MASK));
vm->phys_addr = __pfn_to_phys(md->pfn);
vm->flags = VM_IOREMAP | VM_ARM_STATIC_MAPPING;
vm->flags |= VM_ARM_MTYPE(md->type);
vm->caller = iotable_init;
vm_area_add_early(vm++);
add_static_vm_early(svm++);
}
}
@ -779,13 +782,16 @@ void __init vm_reserve_area_early(unsigned long addr, unsigned long size,
void *caller)
{
struct vm_struct *vm;
struct static_vm *svm;
vm = early_alloc_aligned(sizeof(*vm), __alignof__(*vm));
svm = early_alloc_aligned(sizeof(*svm), __alignof__(*svm));
vm = &svm->vm;
vm->addr = (void *)addr;
vm->size = size;
vm->flags = VM_IOREMAP | VM_ARM_EMPTY_MAPPING;
vm->caller = caller;
vm_area_add_early(vm);
add_static_vm_early(svm);
}
#ifndef CONFIG_ARM_LPAE
@ -810,14 +816,13 @@ static void __init pmd_empty_section_gap(unsigned long addr)
static void __init fill_pmd_gaps(void)
{
struct static_vm *svm;
struct vm_struct *vm;
unsigned long addr, next = 0;
pmd_t *pmd;
/* we're still single threaded hence no lock needed here */
for (vm = vmlist; vm; vm = vm->next) {
if (!(vm->flags & (VM_ARM_STATIC_MAPPING | VM_ARM_EMPTY_MAPPING)))
continue;
list_for_each_entry(svm, &static_vmlist, list) {
vm = &svm->vm;
addr = (unsigned long)vm->addr;
if (addr < next)
continue;
@ -857,19 +862,12 @@ static void __init fill_pmd_gaps(void)
#if defined(CONFIG_PCI) && !defined(CONFIG_NEED_MACH_IO_H)
static void __init pci_reserve_io(void)
{
struct vm_struct *vm;
unsigned long addr;
struct static_vm *svm;
/* we're still single threaded hence no lock needed here */
for (vm = vmlist; vm; vm = vm->next) {
if (!(vm->flags & VM_ARM_STATIC_MAPPING))
continue;
addr = (unsigned long)vm->addr;
addr &= ~(SZ_2M - 1);
if (addr == PCI_IO_VIRT_BASE)
return;
svm = find_static_vm_vaddr((void *)PCI_IO_VIRT_BASE);
if (svm)
return;
}
vm_reserve_area_early(PCI_IO_VIRT_BASE, SZ_2M, pci_reserve_io);
}
#else

5
arch/arm/mm/proc-macros.S
View File

@ -38,9 +38,14 @@
/*
* mmid - get context id from mm pointer (mm->context.id)
* note, this field is 64bit, so in big-endian the two words are swapped too.
*/
.macro mmid, rd, rn
#ifdef __ARMEB__
ldr \rd, [\rn, #MM_CONTEXT_ID + 4 ]
#else
ldr \rd, [\rn, #MM_CONTEXT_ID]
#endif
.endm
/*

2
arch/arm/mm/proc-v6.S
View File

@ -101,7 +101,7 @@ ENTRY(cpu_v6_dcache_clean_area)
ENTRY(cpu_v6_switch_mm)
#ifdef CONFIG_MMU
mov r2, #0
ldr r1, [r1, #MM_CONTEXT_ID] @ get mm->context.id
mmid r1, r1 @ get mm->context.id
ALT_SMP(orr r0, r0, #TTB_FLAGS_SMP)
ALT_UP(orr r0, r0, #TTB_FLAGS_UP)
mcr p15, 0, r2, c7, c5, 6 @ flush BTAC/BTB

2
arch/arm/mm/proc-v7-2level.S
View File

@ -40,7 +40,7 @@
ENTRY(cpu_v7_switch_mm)
#ifdef CONFIG_MMU
mov r2, #0
ldr r1, [r1, #MM_CONTEXT_ID] @ get mm->context.id
mmid r1, r1 @ get mm->context.id
ALT_SMP(orr r0, r0, #TTB_FLAGS_SMP)
ALT_UP(orr r0, r0, #TTB_FLAGS_UP)
#ifdef CONFIG_ARM_ERRATA_430973

2
arch/arm/mm/proc-v7-3level.S
View File

@ -47,7 +47,7 @@
*/
ENTRY(cpu_v7_switch_mm)
#ifdef CONFIG_MMU
ldr r1, [r1, #MM_CONTEXT_ID] @ get mm->context.id
mmid r1, r1 @ get mm->context.id
and r3, r1, #0xff
mov r3, r3, lsl #(48 - 32) @ ASID
mcrr p15, 0, r0, r3, c2 @ set TTB 0

205
arch/arm/mm/vmregion.c
View File

@ -1,205 +0,0 @@
#include <linux/fs.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include "vmregion.h"
/*
* VM region handling support.
*
* This should become something generic, handling VM region allocations for
* vmalloc and similar (ioremap, module space, etc).
*
* I envisage vmalloc()'s supporting vm_struct becoming:
*
* struct vm_struct {
* struct vmregion region;
* unsigned long flags;
* struct page **pages;
* unsigned int nr_pages;
* unsigned long phys_addr;
* };
*
* get_vm_area() would then call vmregion_alloc with an appropriate
* struct vmregion head (eg):
*
* struct vmregion vmalloc_head = {
* .vm_list = LIST_HEAD_INIT(vmalloc_head.vm_list),
* .vm_start = VMALLOC_START,
* .vm_end = VMALLOC_END,
* };
*
* However, vmalloc_head.vm_start is variable (typically, it is dependent on
* the amount of RAM found at boot time.) I would imagine that get_vm_area()
* would have to initialise this each time prior to calling vmregion_alloc().
*/
struct arm_vmregion *
arm_vmregion_alloc(struct arm_vmregion_head *head, size_t align,
size_t size, gfp_t gfp, const void *caller)
{
unsigned long start = head->vm_start, addr = head->vm_end;
unsigned long flags;
struct arm_vmregion *c, *new;
if (head->vm_end - head->vm_start < size) {
printk(KERN_WARNING "%s: allocation too big (requested %#x)\n",
__func__, size);
goto out;
}
new = kmalloc(sizeof(struct arm_vmregion), gfp);
if (!new)
goto out;
new->caller = caller;
spin_lock_irqsave(&head->vm_lock, flags);
addr = rounddown(addr - size, align);
list_for_each_entry_reverse(c, &head->vm_list, vm_list) {
if (addr >= c->vm_end)
goto found;
addr = rounddown(c->vm_start - size, align);
if (addr < start)
goto nospc;
}
found:
/*
* Insert this entry after the one we found.
*/
list_add(&new->vm_list, &c->vm_list);
new->vm_start = addr;
new->vm_end = addr + size;
new->vm_active = 1;
spin_unlock_irqrestore(&head->vm_lock, flags);
return new;
nospc:
spin_unlock_irqrestore(&head->vm_lock, flags);
kfree(new);
out:
return NULL;
}
static struct arm_vmregion *__arm_vmregion_find(struct arm_vmregion_head *head, unsigned long addr)
{
struct arm_vmregion *c;
list_for_each_entry(c, &head->vm_list, vm_list) {
if (c->vm_active && c->vm_start == addr)
goto out;
}
c = NULL;
out:
return c;
}
struct arm_vmregion *arm_vmregion_find(struct arm_vmregion_head *head, unsigned long addr)
{
struct arm_vmregion *c;
unsigned long flags;
spin_lock_irqsave(&head->vm_lock, flags);
c = __arm_vmregion_find(head, addr);
spin_unlock_irqrestore(&head->vm_lock, flags);
return c;
}
struct arm_vmregion *arm_vmregion_find_remove(struct arm_vmregion_head *head, unsigned long addr)
{
struct arm_vmregion *c;
unsigned long flags;
spin_lock_irqsave(&head->vm_lock, flags);
c = __arm_vmregion_find(head, addr);
if (c)
c->vm_active = 0;
spin_unlock_irqrestore(&head->vm_lock, flags);
return c;
}
void arm_vmregion_free(struct arm_vmregion_head *head, struct arm_vmregion *c)
{
unsigned long flags;
spin_lock_irqsave(&head->vm_lock, flags);
list_del(&c->vm_list);
spin_unlock_irqrestore(&head->vm_lock, flags);
kfree(c);
}
#ifdef CONFIG_PROC_FS
static int arm_vmregion_show(struct seq_file *m, void *p)
{
struct arm_vmregion *c = list_entry(p, struct arm_vmregion, vm_list);
seq_printf(m, "0x%08lx-0x%08lx %7lu", c->vm_start, c->vm_end,
c->vm_end - c->vm_start);
if (c->caller)
seq_printf(m, " %pS", (void *)c->caller);
seq_putc(m, '\n');
return 0;
}
static void *arm_vmregion_start(struct seq_file *m, loff_t *pos)
{
struct arm_vmregion_head *h = m->private;
spin_lock_irq(&h->vm_lock);
return seq_list_start(&h->vm_list, *pos);
}
static void *arm_vmregion_next(struct seq_file *m, void *p, loff_t *pos)
{
struct arm_vmregion_head *h = m->private;
return seq_list_next(p, &h->vm_list, pos);
}
static void arm_vmregion_stop(struct seq_file *m, void *p)
{
struct arm_vmregion_head *h = m->private;
spin_unlock_irq(&h->vm_lock);
}
static const struct seq_operations arm_vmregion_ops = {
.start = arm_vmregion_start,
.stop = arm_vmregion_stop,
.next = arm_vmregion_next,
.show = arm_vmregion_show,
};
static int arm_vmregion_open(struct inode *inode, struct file *file)
{
struct arm_vmregion_head *h = PDE(inode)->data;
int ret = seq_open(file, &arm_vmregion_ops);
if (!ret) {
struct seq_file *m = file->private_data;
m->private = h;
}
return ret;
}
static const struct file_operations arm_vmregion_fops = {
.open = arm_vmregion_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
int arm_vmregion_create_proc(const char *path, struct arm_vmregion_head *h)
{
proc_create_data(path, S_IRUSR, NULL, &arm_vmregion_fops, h);
return 0;
}
#else
int arm_vmregion_create_proc(const char *path, struct arm_vmregion_head *h)
{
return 0;
}
#endif

31
arch/arm/mm/vmregion.h
View File

@ -1,31 +0,0 @@
#ifndef VMREGION_H
#define VMREGION_H
#include <linux/spinlock.h>
#include <linux/list.h>
struct page;
struct arm_vmregion_head {
spinlock_t vm_lock;
struct list_head vm_list;
unsigned long vm_start;
unsigned long vm_end;
};
struct arm_vmregion {
struct list_head vm_list;
unsigned long vm_start;
unsigned long vm_end;
int vm_active;
const void *caller;
};
struct arm_vmregion *arm_vmregion_alloc(struct arm_vmregion_head *, size_t, size_t, gfp_t, const void *);
struct arm_vmregion *arm_vmregion_find(struct arm_vmregion_head *, unsigned long);
struct arm_vmregion *arm_vmregion_find_remove(struct arm_vmregion_head *, unsigned long);
void arm_vmregion_free(struct arm_vmregion_head *, struct arm_vmregion *);
int arm_vmregion_create_proc(const char *, struct arm_vmregion_head *);
#endif

310
drivers/mmc/host/mmci.c
View File

@ -20,6 +20,7 @@
#include <linux/err.h>
#include <linux/highmem.h>
#include <linux/log2.h>
#include <linux/mmc/pm.h>
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
#include <linux/amba/bus.h>
@ -59,6 +60,7 @@ static unsigned int fmax = 515633;
* @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register
* @pwrreg_powerup: power up value for MMCIPOWER register
* @signal_direction: input/out direction of bus signals can be indicated
* @pwrreg_clkgate: MMCIPOWER register must be used to gate the clock
*/
struct variant_data {
unsigned int clkreg;
@ -71,6 +73,7 @@ struct variant_data {
bool blksz_datactrl16;
u32 pwrreg_powerup;
bool signal_direction;
bool pwrreg_clkgate;
};
static struct variant_data variant_arm = {
@ -87,6 +90,14 @@ static struct variant_data variant_arm_extended_fifo = {
.pwrreg_powerup = MCI_PWR_UP,
};
static struct variant_data variant_arm_extended_fifo_hwfc = {
.fifosize = 128 * 4,
.fifohalfsize = 64 * 4,
.clkreg_enable = MCI_ARM_HWFCEN,
.datalength_bits = 16,
.pwrreg_powerup = MCI_PWR_UP,
};
static struct variant_data variant_u300 = {
.fifosize = 16 * 4,
.fifohalfsize = 8 * 4,
@ -95,6 +106,7 @@ static struct variant_data variant_u300 = {
.sdio = true,
.pwrreg_powerup = MCI_PWR_ON,
.signal_direction = true,
.pwrreg_clkgate = true,
};
static struct variant_data variant_nomadik = {
@ -106,6 +118,7 @@ static struct variant_data variant_nomadik = {
.st_clkdiv = true,
.pwrreg_powerup = MCI_PWR_ON,
.signal_direction = true,
.pwrreg_clkgate = true,
};
static struct variant_data variant_ux500 = {
@ -118,6 +131,7 @@ static struct variant_data variant_ux500 = {
.st_clkdiv = true,
.pwrreg_powerup = MCI_PWR_ON,
.signal_direction = true,
.pwrreg_clkgate = true,
};
static struct variant_data variant_ux500v2 = {
@ -131,8 +145,27 @@ static struct variant_data variant_ux500v2 = {
.blksz_datactrl16 = true,
.pwrreg_powerup = MCI_PWR_ON,
.signal_direction = true,
.pwrreg_clkgate = true,
};
/*
* Validate mmc prerequisites
*/
static int mmci_validate_data(struct mmci_host *host,
struct mmc_data *data)
{
if (!data)
return 0;
if (!is_power_of_2(data->blksz)) {
dev_err(mmc_dev(host->mmc),
"unsupported block size (%d bytes)\n", data->blksz);
return -EINVAL;
}
return 0;
}
/*
* This must be called with host->lock held
*/
@ -202,6 +235,9 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_8)
clk |= MCI_ST_8BIT_BUS;
if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50)
clk |= MCI_ST_UX500_NEG_EDGE;
mmci_write_clkreg(host, clk);
}
@ -352,10 +388,33 @@ static inline void mmci_dma_release(struct mmci_host *host)
host->dma_rx_channel = host->dma_tx_channel = NULL;
}
static void mmci_dma_data_error(struct mmci_host *host)
{
dev_err(mmc_dev(host->mmc), "error during DMA transfer!\n");
dmaengine_terminate_all(host->dma_current);
host->dma_current = NULL;
host->dma_desc_current = NULL;
host->data->host_cookie = 0;
}
static void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data)
{
struct dma_chan *chan = host->dma_current;
struct dma_chan *chan;
enum dma_data_direction dir;
if (data->flags & MMC_DATA_READ) {
dir = DMA_FROM_DEVICE;
chan = host->dma_rx_channel;
} else {
dir = DMA_TO_DEVICE;
chan = host->dma_tx_channel;
}
dma_unmap_sg(chan->device->dev, data->sg, data->sg_len, dir);
}
static void mmci_dma_finalize(struct mmci_host *host, struct mmc_data *data)
{
u32 status;
int i;
@ -374,19 +433,13 @@ static void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data)
* contiguous buffers. On TX, we'll get a FIFO underrun error.
*/
if (status & MCI_RXDATAAVLBLMASK) {
dmaengine_terminate_all(chan);
mmci_dma_data_error(host);
if (!data->error)
data->error = -EIO;
}
if (data->flags & MMC_DATA_WRITE) {
dir = DMA_TO_DEVICE;
} else {
dir = DMA_FROM_DEVICE;
}
if (!data->host_cookie)
dma_unmap_sg(chan->device->dev, data->sg, data->sg_len, dir);
mmci_dma_unmap(host, data);
/*
* Use of DMA with scatter-gather is impossible.
@ -396,16 +449,15 @@ static void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data)
dev_err(mmc_dev(host->mmc), "buggy DMA detected. Taking evasive action.\n");
mmci_dma_release(host);
}
host->dma_current = NULL;
host->dma_desc_current = NULL;
}
static void mmci_dma_data_error(struct mmci_host *host)
{
dev_err(mmc_dev(host->mmc), "error during DMA transfer!\n");
dmaengine_terminate_all(host->dma_current);
}
static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
struct mmci_host_next *next)
/* prepares DMA channel and DMA descriptor, returns non-zero on failure */
static int __mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
struct dma_chan **dma_chan,
struct dma_async_tx_descriptor **dma_desc)
{
struct variant_data *variant = host->variant;
struct dma_slave_config conf = {
@ -423,16 +475,6 @@ static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
enum dma_data_direction buffer_dirn;
int nr_sg;
/* Check if next job is already prepared */
if (data->host_cookie && !next &&
host->dma_current && host->dma_desc_current)
return 0;
if (!next) {
host->dma_current = NULL;
host->dma_desc_current = NULL;
}
if (data->flags & MMC_DATA_READ) {
conf.direction = DMA_DEV_TO_MEM;
buffer_dirn = DMA_FROM_DEVICE;
@ -462,29 +504,41 @@ static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
if (!desc)
goto unmap_exit;
if (next) {
next->dma_chan = chan;
next->dma_desc = desc;
} else {
host->dma_current = chan;
host->dma_desc_current = desc;
}
*dma_chan = chan;
*dma_desc = desc;
return 0;
unmap_exit:
if (!next)
dmaengine_terminate_all(chan);
dma_unmap_sg(device->dev, data->sg, data->sg_len, buffer_dirn);
return -ENOMEM;
}
static inline int mmci_dma_prep_data(struct mmci_host *host,
struct mmc_data *data)
{
/* Check if next job is already prepared. */
if (host->dma_current && host->dma_desc_current)
return 0;
/* No job were prepared thus do it now. */
return __mmci_dma_prep_data(host, data, &host->dma_current,
&host->dma_desc_current);
}
static inline int mmci_dma_prep_next(struct mmci_host *host,
struct mmc_data *data)
{
struct mmci_host_next *nd = &host->next_data;
return __mmci_dma_prep_data(host, data, &nd->dma_chan, &nd->dma_desc);
}
static int mmci_dma_start_data(struct mmci_host *host, unsigned int datactrl)
{
int ret;
struct mmc_data *data = host->data;
ret = mmci_dma_prep_data(host, host->data, NULL);
ret = mmci_dma_prep_data(host, host->data);
if (ret)
return ret;
@ -514,19 +568,11 @@ static void mmci_get_next_data(struct mmci_host *host, struct mmc_data *data)
{
struct mmci_host_next *next = &host->next_data;
if (data->host_cookie && data->host_cookie != next->cookie) {
pr_warning("[%s] invalid cookie: data->host_cookie %d"
" host->next_data.cookie %d\n",
__func__, data->host_cookie, host->next_data.cookie);
data->host_cookie = 0;
}
if (!data->host_cookie)
return;
WARN_ON(data->host_cookie && data->host_cookie != next->cookie);
WARN_ON(!data->host_cookie && (next->dma_desc || next->dma_chan));
host->dma_desc_current = next->dma_desc;
host->dma_current = next->dma_chan;
next->dma_desc = NULL;
next->dma_chan = NULL;
}
@ -541,19 +587,13 @@ static void mmci_pre_request(struct mmc_host *mmc, struct mmc_request *mrq,
if (!data)
return;
if (data->host_cookie) {
data->host_cookie = 0;
return;
}
BUG_ON(data->host_cookie);
/* if config for dma */
if (((data->flags & MMC_DATA_WRITE) && host->dma_tx_channel) ||
((data->flags & MMC_DATA_READ) && host->dma_rx_channel)) {
if (mmci_dma_prep_data(host, data, nd))
data->host_cookie = 0;
else
data->host_cookie = ++nd->cookie < 0 ? 1 : nd->cookie;
}
if (mmci_validate_data(host, data))
return;
if (!mmci_dma_prep_next(host, data))
data->host_cookie = ++nd->cookie < 0 ? 1 : nd->cookie;
}
static void mmci_post_request(struct mmc_host *mmc, struct mmc_request *mrq,
@ -561,29 +601,23 @@ static void mmci_post_request(struct mmc_host *mmc, struct mmc_request *mrq,
{
struct mmci_host *host = mmc_priv(mmc);
struct mmc_data *data = mrq->data;
struct dma_chan *chan;
enum dma_data_direction dir;
if (!data)
if (!data || !data->host_cookie)
return;
if (data->flags & MMC_DATA_READ) {
dir = DMA_FROM_DEVICE;
chan = host->dma_rx_channel;
} else {
dir = DMA_TO_DEVICE;
chan = host->dma_tx_channel;
}
mmci_dma_unmap(host, data);
if (err) {
struct mmci_host_next *next = &host->next_data;
struct dma_chan *chan;
if (data->flags & MMC_DATA_READ)
chan = host->dma_rx_channel;
else
chan = host->dma_tx_channel;
dmaengine_terminate_all(chan);
/* if config for dma */
if (chan) {
if (err)
dmaengine_terminate_all(chan);
if (data->host_cookie)
dma_unmap_sg(mmc_dev(host->mmc), data->sg,
data->sg_len, dir);
mrq->data->host_cookie = 0;
next->dma_desc = NULL;
next->dma_chan = NULL;
}
}
@ -604,6 +638,11 @@ static inline void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data)
{
}
static inline void mmci_dma_finalize(struct mmci_host *host,
struct mmc_data *data)
{
}
static inline void mmci_dma_data_error(struct mmci_host *host)
{
}
@ -680,6 +719,9 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
mmci_write_clkreg(host, clk);
}
if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50)
datactrl |= MCI_ST_DPSM_DDRMODE;
/*
* Attempt to use DMA operation mode, if this
* should fail, fall back to PIO mode
@ -751,8 +793,10 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
u32 remain, success;
/* Terminate the DMA transfer */
if (dma_inprogress(host))
if (dma_inprogress(host)) {
mmci_dma_data_error(host);
mmci_dma_unmap(host, data);
}
/*
* Calculate how far we are into the transfer. Note that
@ -791,7 +835,7 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
if (status & MCI_DATAEND || data->error) {
if (dma_inprogress(host))
mmci_dma_unmap(host, data);
mmci_dma_finalize(host, data);
mmci_stop_data(host);
if (!data->error)
@ -828,8 +872,10 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd,
if (!cmd->data || cmd->error) {
if (host->data) {
/* Terminate the DMA transfer */
if (dma_inprogress(host))
if (dma_inprogress(host)) {
mmci_dma_data_error(host);
mmci_dma_unmap(host, host->data);
}
mmci_stop_data(host);
}
mmci_request_end(host, cmd->mrq);
@ -1055,10 +1101,8 @@ static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
WARN_ON(host->mrq != NULL);
if (mrq->data && !is_power_of_2(mrq->data->blksz)) {
dev_err(mmc_dev(mmc), "unsupported block size (%d bytes)\n",
mrq->data->blksz);
mrq->cmd->error = -EINVAL;
mrq->cmd->error = mmci_validate_data(host, mrq->data);
if (mrq->cmd->error) {
mmc_request_done(mmc, mrq);
return;
}
@ -1086,7 +1130,6 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
struct variant_data *variant = host->variant;
u32 pwr = 0;
unsigned long flags;
int ret;
pm_runtime_get_sync(mmc_dev(mmc));
@ -1096,23 +1139,13 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
switch (ios->power_mode) {
case MMC_POWER_OFF:
if (host->vcc)
ret = mmc_regulator_set_ocr(mmc, host->vcc, 0);
if (!IS_ERR(mmc->supply.vmmc))
mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
break;
case MMC_POWER_UP:
if (host->vcc) {
ret = mmc_regulator_set_ocr(mmc, host->vcc, ios->vdd);
if (ret) {
dev_err(mmc_dev(mmc), "unable to set OCR\n");
/*
* The .set_ios() function in the mmc_host_ops
* struct return void, and failing to set the
* power should be rare so we print an error
* and return here.
*/
goto out;
}
}
if (!IS_ERR(mmc->supply.vmmc))
mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, ios->vdd);
/*
* The ST Micro variant doesn't have the PL180s MCI_PWR_UP
* and instead uses MCI_PWR_ON so apply whatever value is
@ -1154,6 +1187,13 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
}
}
/*
* If clock = 0 and the variant requires the MMCIPOWER to be used for
* gating the clock, the MCI_PWR_ON bit is cleared.
*/
if (!ios->clock && variant->pwrreg_clkgate)
pwr &= ~MCI_PWR_ON;
spin_lock_irqsave(&host->lock, flags);
mmci_set_clkreg(host, ios->clock);
@ -1161,7 +1201,6 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
spin_unlock_irqrestore(&host->lock, flags);
out:
pm_runtime_mark_last_busy(mmc_dev(mmc));
pm_runtime_put_autosuspend(mmc_dev(mmc));
}
@ -1384,32 +1423,19 @@ static int mmci_probe(struct amba_device *dev,
} else
dev_warn(&dev->dev, "could not get default pinstate\n");
#ifdef CONFIG_REGULATOR
/* If we're using the regulator framework, try to fetch a regulator */
host->vcc = regulator_get(&dev->dev, "vmmc");
if (IS_ERR(host->vcc))
host->vcc = NULL;
else {
int mask = mmc_regulator_get_ocrmask(host->vcc);
if (mask < 0)
dev_err(&dev->dev, "error getting OCR mask (%d)\n",
mask);
else {
host->mmc->ocr_avail = (u32) mask;
if (plat->ocr_mask)
dev_warn(&dev->dev,
"Provided ocr_mask/setpower will not be used "
"(using regulator instead)\n");
}
}
#endif
/* Fall back to platform data if no regulator is found */
if (host->vcc == NULL)
/* Get regulators and the supported OCR mask */
mmc_regulator_get_supply(mmc);
if (!mmc->ocr_avail)
mmc->ocr_avail = plat->ocr_mask;
else if (plat->ocr_mask)
dev_warn(mmc_dev(mmc), "Platform OCR mask is ignored\n");
mmc->caps = plat->capabilities;
mmc->caps2 = plat->capabilities2;
/* We support these PM capabilities. */
mmc->pm_caps = MMC_PM_KEEP_POWER;
/*
* We can do SGIO
*/
@ -1585,10 +1611,6 @@ static int mmci_remove(struct amba_device *dev)
clk_disable_unprepare(host->clk);
clk_put(host->clk);
if (host->vcc)
mmc_regulator_set_ocr(mmc, host->vcc, 0);
regulator_put(host->vcc);
mmc_free_host(mmc);
amba_release_regions(dev);
@ -1636,8 +1658,37 @@ static int mmci_resume(struct device *dev)
}
#endif
#ifdef CONFIG_PM_RUNTIME
static int mmci_runtime_suspend(struct device *dev)
{
struct amba_device *adev = to_amba_device(dev);
struct mmc_host *mmc = amba_get_drvdata(adev);
if (mmc) {
struct mmci_host *host = mmc_priv(mmc);
clk_disable_unprepare(host->clk);
}
return 0;
}
static int mmci_runtime_resume(struct device *dev)
{
struct amba_device *adev = to_amba_device(dev);
struct mmc_host *mmc = amba_get_drvdata(adev);
if (mmc) {
struct mmci_host *host = mmc_priv(mmc);
clk_prepare_enable(host->clk);
}
return 0;
}
#endif
static const struct dev_pm_ops mmci_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(mmci_suspend, mmci_resume)
SET_RUNTIME_PM_OPS(mmci_runtime_suspend, mmci_runtime_resume, NULL)
};
static struct amba_id mmci_ids[] = {
@ -1651,6 +1702,11 @@ static struct amba_id mmci_ids[] = {
.mask = 0xff0fffff,
.data = &variant_arm_extended_fifo,
},
{
.id = 0x02041180,
.mask = 0xff0fffff,
.data = &variant_arm_extended_fifo_hwfc,
},
{
.id = 0x00041181,
.mask = 0x000fffff,

3
drivers/mmc/host/mmci.h
View File

@ -28,6 +28,8 @@
#define MCI_ST_UX500_NEG_EDGE (1 << 13)
#define MCI_ST_UX500_HWFCEN (1 << 14)
#define MCI_ST_UX500_CLK_INV (1 << 15)
/* Modified PL180 on Versatile Express platform */
#define MCI_ARM_HWFCEN (1 << 12)
#define MMCIARGUMENT 0x008
#define MMCICOMMAND 0x00c
@ -193,7 +195,6 @@ struct mmci_host {
/* pio stuff */
struct sg_mapping_iter sg_miter;
unsigned int size;
struct regulator *vcc;
/* pinctrl handles */
struct pinctrl *pinctrl;