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Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6

Browse Source 
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
  [S390] Poison init section before freeing it.
  [S390] Use add_active_range() and free_area_init_nodes().
  [S390] Virtual memmap for s390.
  [S390] Update documentation for dynamic subchannel mapping.
  [S390] Use dev->groups for adding/removing the subchannel attribute group.
  [S390] Support for disconnected devices reappearing on another subchannel.
  [S390] subchannel lock conversion.
  [S390] Some preparations for the dynamic subchannel mapping patch.
  [S390] runtime switch for qdio performance statistics
  [S390] New DASD feature for ERP related logging
  [S390] add reset call handler to the ap bus.
  [S390] more workqueue fixes.
  [S390] workqueue fixes.
  [S390] uaccess_pt: add missing down_read() and convert to is_init().
This commit is contained in:
Linus Torvalds 2006-12-08 11:21:55 -08:00
commit 88032b322a
35 changed files with 1301 additions and 658 deletions
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7
Documentation/s390/driver-model.txt
View File

@ -18,11 +18,18 @@ devices/
- 0.0.0002/
- 0.1.0000/0.1.1234/
...
- defunct/
In this example, device 0815 is accessed via subchannel 0 in subchannel set 0,
device 4711 via subchannel 1 in subchannel set 0, and subchannel 2 is a non-I/O
subchannel. Device 1234 is accessed via subchannel 0 in subchannel set 1.
The subchannel named 'defunct' does not represent any real subchannel on the
system; it is a pseudo subchannel where disconnnected ccw devices are moved to
if they are displaced by another ccw device becoming operational on their
former subchannel. The ccw devices will be moved again to a proper subchannel
if they become operational again on that subchannel.
You should address a ccw device via its bus id (e.g. 0.0.4711); the device can
be found under bus/ccw/devices/.

14
arch/s390/Kconfig
View File

@ -241,8 +241,14 @@ config WARN_STACK_SIZE
This allows you to specify the maximum frame size a function may
have without the compiler complaining about it.
config ARCH_POPULATES_NODE_MAP
def_bool y
source "mm/Kconfig"
config HOLES_IN_ZONE
def_bool y
comment "I/O subsystem configuration"
config MACHCHK_WARNING
@ -266,14 +272,6 @@ config QDIO
If unsure, say Y.
config QDIO_PERF_STATS
bool "Performance statistics in /proc"
depends on QDIO
help
Say Y here to get performance statistics in /proc/qdio_perf
If unsure, say N.
config QDIO_DEBUG
bool "Extended debugging information"
depends on QDIO

1
arch/s390/defconfig
View File

@ -134,7 +134,6 @@ CONFIG_RESOURCES_64BIT=y
#
CONFIG_MACHCHK_WARNING=y
CONFIG_QDIO=y
# CONFIG_QDIO_PERF_STATS is not set
# CONFIG_QDIO_DEBUG is not set
#

55
arch/s390/kernel/setup.c
View File

@ -64,9 +64,8 @@ unsigned int console_devno = -1;
unsigned int console_irq = -1;
unsigned long machine_flags = 0;
struct mem_chunk memory_chunk[MEMORY_CHUNKS];
struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS];
volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */
unsigned long __initdata zholes_size[MAX_NR_ZONES];
static unsigned long __initdata memory_end;
/*
@ -354,21 +353,6 @@ void machine_power_off(void)
*/
void (*pm_power_off)(void) = machine_power_off;
static void __init
add_memory_hole(unsigned long start, unsigned long end)
{
unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT;
if (end <= dma_pfn)
zholes_size[ZONE_DMA] += end - start + 1;
else if (start > dma_pfn)
zholes_size[ZONE_NORMAL] += end - start + 1;
else {
zholes_size[ZONE_DMA] += dma_pfn - start + 1;
zholes_size[ZONE_NORMAL] += end - dma_pfn;
}
}
static int __init early_parse_mem(char *p)
{
memory_end = memparse(p, &p);
@ -521,7 +505,6 @@ setup_memory(void)
{
unsigned long bootmap_size;
unsigned long start_pfn, end_pfn, init_pfn;
unsigned long last_rw_end;
int i;
/*
@ -577,39 +560,27 @@ setup_memory(void)
/*
* Register RAM areas with the bootmem allocator.
*/
last_rw_end = start_pfn;
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
unsigned long start_chunk, end_chunk;
unsigned long start_chunk, end_chunk, pfn;
if (memory_chunk[i].type != CHUNK_READ_WRITE)
continue;
start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1);
start_chunk >>= PAGE_SHIFT;
end_chunk = (memory_chunk[i].addr + memory_chunk[i].size);
end_chunk >>= PAGE_SHIFT;
if (start_chunk < start_pfn)
start_chunk = start_pfn;
if (end_chunk > end_pfn)
end_chunk = end_pfn;
if (start_chunk < end_chunk) {
/* Initialize storage key for RAM pages */
for (init_pfn = start_chunk ; init_pfn < end_chunk;
init_pfn++)
page_set_storage_key(init_pfn << PAGE_SHIFT,
PAGE_DEFAULT_KEY);
free_bootmem(start_chunk << PAGE_SHIFT,
(end_chunk - start_chunk) << PAGE_SHIFT);
if (last_rw_end < start_chunk)
add_memory_hole(last_rw_end, start_chunk - 1);
last_rw_end = end_chunk;
}
start_chunk = PFN_DOWN(memory_chunk[i].addr);
end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size) - 1;
end_chunk = min(end_chunk, end_pfn);
if (start_chunk >= end_chunk)
continue;
add_active_range(0, start_chunk, end_chunk);
pfn = max(start_chunk, start_pfn);
for (; pfn <= end_chunk; pfn++)
page_set_storage_key(PFN_PHYS(pfn), PAGE_DEFAULT_KEY);
}
psw_set_key(PAGE_DEFAULT_KEY);
if (last_rw_end < end_pfn - 1)
add_memory_hole(last_rw_end, end_pfn - 1);
free_bootmem_with_active_regions(0, max_pfn);
reserve_bootmem(0, PFN_PHYS(start_pfn));
/*
* Reserve the bootmem bitmap itself as well. We do this in two

5
arch/s390/lib/uaccess_pt.c
View File

@ -8,8 +8,8 @@
*/
#include <linux/errno.h>
#include <asm/uaccess.h>
#include <linux/mm.h>
#include <asm/uaccess.h>
#include <asm/futex.h>
static inline int __handle_fault(struct mm_struct *mm, unsigned long address,
@ -60,8 +60,9 @@ out:
out_of_memory:
up_read(&mm->mmap_sem);
if (current->pid == 1) {
if (is_init(current)) {
yield();
down_read(&mm->mmap_sem);
goto survive;
}
printk("VM: killing process %s\n", current->comm);

2
arch/s390/mm/Makefile
View File

@ -2,6 +2,6 @@
# Makefile for the linux s390-specific parts of the memory manager.
#
obj-y := init.o fault.o ioremap.o extmem.o mmap.o
obj-y := init.o fault.o ioremap.o extmem.o mmap.o vmem.o
obj-$(CONFIG_CMM) += cmm.o

110
arch/s390/mm/extmem.c
View File

@ -16,6 +16,7 @@
#include <linux/bootmem.h>
#include <linux/ctype.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/ebcdic.h>
#include <asm/errno.h>
#include <asm/extmem.h>
@ -237,65 +238,6 @@ query_segment_type (struct dcss_segment *seg)
return rc;
}
/*
* check if the given segment collides with guest storage.
* returns 1 if this is the case, 0 if no collision was found
*/
static int
segment_overlaps_storage(struct dcss_segment *seg)
{
int i;
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
if (memory_chunk[i].type != CHUNK_READ_WRITE)
continue;
if ((memory_chunk[i].addr >> 20) > (seg->end >> 20))
continue;
if (((memory_chunk[i].addr + memory_chunk[i].size - 1) >> 20)
< (seg->start_addr >> 20))
continue;
return 1;
}
return 0;
}
/*
* check if segment collides with other segments that are currently loaded
* returns 1 if this is the case, 0 if no collision was found
*/
static int
segment_overlaps_others (struct dcss_segment *seg)
{
struct list_head *l;
struct dcss_segment *tmp;
BUG_ON(!mutex_is_locked(&dcss_lock));
list_for_each(l, &dcss_list) {
tmp = list_entry(l, struct dcss_segment, list);
if ((tmp->start_addr >> 20) > (seg->end >> 20))
continue;
if ((tmp->end >> 20) < (seg->start_addr >> 20))
continue;
if (seg == tmp)
continue;
return 1;
}
return 0;
}
/*
* check if segment exceeds the kernel mapping range (detected or set via mem=)
* returns 1 if this is the case, 0 if segment fits into the range
*/
static inline int
segment_exceeds_range (struct dcss_segment *seg)
{
int seg_last_pfn = (seg->end) >> PAGE_SHIFT;
if (seg_last_pfn > max_pfn)
return 1;
return 0;
}
/*
* get info about a segment
* possible return values:
@ -341,24 +283,26 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
rc = query_segment_type (seg);
if (rc < 0)
goto out_free;
if (segment_exceeds_range(seg)) {
PRINT_WARN ("segment_load: not loading segment %s - exceeds"
" kernel mapping range\n",name);
rc = -ERANGE;
goto out_free;
}
if (segment_overlaps_storage(seg)) {
PRINT_WARN ("segment_load: not loading segment %s - overlaps"
" storage\n",name);
rc = -ENOSPC;
goto out_free;
}
if (segment_overlaps_others(seg)) {
PRINT_WARN ("segment_load: not loading segment %s - overlaps"
" other segments\n",name);
rc = -EBUSY;
rc = add_shared_memory(seg->start_addr, seg->end - seg->start_addr + 1);
switch (rc) {
case 0:
break;
case -ENOSPC:
PRINT_WARN("segment_load: not loading segment %s - overlaps "
"storage/segment\n", name);
goto out_free;
case -ERANGE:
PRINT_WARN("segment_load: not loading segment %s - exceeds "
"kernel mapping range\n", name);
goto out_free;
default:
PRINT_WARN("segment_load: not loading segment %s (rc: %d)\n",
name, rc);
goto out_free;
}
if (do_nonshared)
dcss_command = DCSS_LOADNSR;
else
@ -372,7 +316,7 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
rc = dcss_diag_translate_rc (seg->end);
dcss_diag(DCSS_PURGESEG, seg->dcss_name,
&seg->start_addr, &seg->end);
goto out_free;
goto out_shared;
}
seg->do_nonshared = do_nonshared;
atomic_set(&seg->ref_count, 1);
@ -391,6 +335,8 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
(void*)seg->start_addr, (void*)seg->end,
segtype_string[seg->vm_segtype]);
goto out;
out_shared:
remove_shared_memory(seg->start_addr, seg->end - seg->start_addr + 1);
out_free:
kfree(seg);
out:
@ -530,12 +476,12 @@ segment_unload(char *name)
"please report to linux390@de.ibm.com\n",name);
goto out_unlock;
}
if (atomic_dec_return(&seg->ref_count) == 0) {
list_del(&seg->list);
dcss_diag(DCSS_PURGESEG, seg->dcss_name,
&dummy, &dummy);
kfree(seg);
}
if (atomic_dec_return(&seg->ref_count) != 0)
goto out_unlock;
remove_shared_memory(seg->start_addr, seg->end - seg->start_addr + 1);
list_del(&seg->list);
dcss_diag(DCSS_PURGESEG, seg->dcss_name, &dummy, &dummy);
kfree(seg);
out_unlock:
mutex_unlock(&dcss_lock);
}

186
arch/s390/mm/init.c
View File

@ -24,6 +24,7 @@
#include <linux/pagemap.h>
#include <linux/bootmem.h>
#include <linux/pfn.h>
#include <linux/poison.h>
#include <asm/processor.h>
#include <asm/system.h>
@ -69,6 +70,8 @@ void show_mem(void)
printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
i = max_mapnr;
while (i-- > 0) {
if (!pfn_valid(i))
continue;
page = pfn_to_page(i);
total++;
if (PageReserved(page))
@ -84,150 +87,52 @@ void show_mem(void)
printk("%d pages swap cached\n",cached);
}
extern unsigned long __initdata zholes_size[];
static void __init setup_ro_region(void)
{
pgd_t *pgd;
pmd_t *pmd;
pte_t *pte;
pte_t new_pte;
unsigned long address, end;
address = ((unsigned long)&__start_rodata) & PAGE_MASK;
end = PFN_ALIGN((unsigned long)&__end_rodata);
for (; address < end; address += PAGE_SIZE) {
pgd = pgd_offset_k(address);
pmd = pmd_offset(pgd, address);
pte = pte_offset_kernel(pmd, address);
new_pte = mk_pte_phys(address, __pgprot(_PAGE_RO));
set_pte(pte, new_pte);
}
}
extern void vmem_map_init(void);
/*
* paging_init() sets up the page tables
*/
#ifndef CONFIG_64BIT
void __init paging_init(void)
{
pgd_t * pg_dir;
pte_t * pg_table;
pte_t pte;
int i;
unsigned long tmp;
unsigned long pfn = 0;
unsigned long pgdir_k = (__pa(swapper_pg_dir) & PAGE_MASK) | _KERNSEG_TABLE;
static const int ssm_mask = 0x04000000L;
unsigned long ro_start_pfn, ro_end_pfn;
unsigned long zones_size[MAX_NR_ZONES];
ro_start_pfn = PFN_DOWN((unsigned long)&__start_rodata);
ro_end_pfn = PFN_UP((unsigned long)&__end_rodata);
memset(zones_size, 0, sizeof(zones_size));
zones_size[ZONE_DMA] = max_low_pfn;
free_area_init_node(0, &contig_page_data, zones_size,
__pa(PAGE_OFFSET) >> PAGE_SHIFT,
zholes_size);
/* unmap whole virtual address space */
pg_dir = swapper_pg_dir;
for (i = 0; i < PTRS_PER_PGD; i++)
pmd_clear((pmd_t *) pg_dir++);
/*
* map whole physical memory to virtual memory (identity mapping)
*/
pg_dir = swapper_pg_dir;
while (pfn < max_low_pfn) {
/*
* pg_table is physical at this point
*/
pg_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
pmd_populate_kernel(&init_mm, (pmd_t *) pg_dir, pg_table);
pg_dir++;
for (tmp = 0 ; tmp < PTRS_PER_PTE ; tmp++,pg_table++) {
if (pfn >= ro_start_pfn && pfn < ro_end_pfn)
pte = pfn_pte(pfn, __pgprot(_PAGE_RO));
else
pte = pfn_pte(pfn, PAGE_KERNEL);
if (pfn >= max_low_pfn)
pte_val(pte) = _PAGE_TYPE_EMPTY;
set_pte(pg_table, pte);
pfn++;
}
}
S390_lowcore.kernel_asce = pgdir_k;
/* enable virtual mapping in kernel mode */
__ctl_load(pgdir_k, 1, 1);
__ctl_load(pgdir_k, 7, 7);
__ctl_load(pgdir_k, 13, 13);
__raw_local_irq_ssm(ssm_mask);
local_flush_tlb();
}
#else /* CONFIG_64BIT */
void __init paging_init(void)
{
pgd_t * pg_dir;
pmd_t * pm_dir;
pte_t * pt_dir;
pte_t pte;
int i,j,k;
unsigned long pfn = 0;
unsigned long pgdir_k = (__pa(swapper_pg_dir) & PAGE_MASK) |
_KERN_REGION_TABLE;
pgd_t *pg_dir;
int i;
unsigned long pgdir_k;
static const int ssm_mask = 0x04000000L;
unsigned long zones_size[MAX_NR_ZONES];
unsigned long dma_pfn, high_pfn;
unsigned long ro_start_pfn, ro_end_pfn;
unsigned long max_zone_pfns[MAX_NR_ZONES];
memset(zones_size, 0, sizeof(zones_size));
dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT;
high_pfn = max_low_pfn;
ro_start_pfn = PFN_DOWN((unsigned long)&__start_rodata);
ro_end_pfn = PFN_UP((unsigned long)&__end_rodata);
if (dma_pfn > high_pfn)
zones_size[ZONE_DMA] = high_pfn;
else {
zones_size[ZONE_DMA] = dma_pfn;
zones_size[ZONE_NORMAL] = high_pfn - dma_pfn;
}
/* Initialize mem_map[]. */
free_area_init_node(0, &contig_page_data, zones_size,
__pa(PAGE_OFFSET) >> PAGE_SHIFT, zholes_size);
/*
* map whole physical memory to virtual memory (identity mapping)
*/
pg_dir = swapper_pg_dir;
pg_dir = swapper_pg_dir;
for (i = 0 ; i < PTRS_PER_PGD ; i++,pg_dir++) {
if (pfn >= max_low_pfn) {
pgd_clear(pg_dir);
continue;
}
pm_dir = (pmd_t *) alloc_bootmem_pages(PAGE_SIZE * 4);
pgd_populate(&init_mm, pg_dir, pm_dir);
for (j = 0 ; j < PTRS_PER_PMD ; j++,pm_dir++) {
if (pfn >= max_low_pfn) {
pmd_clear(pm_dir);
continue;
}
pt_dir = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
pmd_populate_kernel(&init_mm, pm_dir, pt_dir);
for (k = 0 ; k < PTRS_PER_PTE ; k++,pt_dir++) {
if (pfn >= ro_start_pfn && pfn < ro_end_pfn)
pte = pfn_pte(pfn, __pgprot(_PAGE_RO));
else
pte = pfn_pte(pfn, PAGE_KERNEL);
if (pfn >= max_low_pfn)
pte_val(pte) = _PAGE_TYPE_EMPTY;
set_pte(pt_dir, pte);
pfn++;
}
}
}
#ifdef CONFIG_64BIT
pgdir_k = (__pa(swapper_pg_dir) & PAGE_MASK) | _KERN_REGION_TABLE;
for (i = 0; i < PTRS_PER_PGD; i++)
pgd_clear(pg_dir + i);
#else
pgdir_k = (__pa(swapper_pg_dir) & PAGE_MASK) | _KERNSEG_TABLE;
for (i = 0; i < PTRS_PER_PGD; i++)
pmd_clear((pmd_t *)(pg_dir + i));
#endif
vmem_map_init();
setup_ro_region();
S390_lowcore.kernel_asce = pgdir_k;
@ -237,9 +142,11 @@ void __init paging_init(void)
__ctl_load(pgdir_k, 13, 13);
__raw_local_irq_ssm(ssm_mask);
local_flush_tlb();
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
max_zone_pfns[ZONE_DMA] = PFN_DOWN(MAX_DMA_ADDRESS);
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
free_area_init_nodes(max_zone_pfns);
}
#endif /* CONFIG_64BIT */
void __init mem_init(void)
{
@ -269,6 +176,8 @@ void __init mem_init(void)
printk("Write protected kernel read-only data: %#lx - %#lx\n",
(unsigned long)&__start_rodata,
PFN_ALIGN((unsigned long)&__end_rodata) - 1);
printk("Virtual memmap size: %ldk\n",
(max_pfn * sizeof(struct page)) >> 10);
}
void free_initmem(void)
@ -279,6 +188,7 @@ void free_initmem(void)
for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
ClearPageReserved(virt_to_page(addr));
init_page_count(virt_to_page(addr));
memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
free_page(addr);
totalram_pages++;
}

381
arch/s390/mm/vmem.c Normal file
View File

@ -0,0 +1,381 @@
/*
* arch/s390/mm/vmem.c
*
* Copyright IBM Corp. 2006
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#include <linux/bootmem.h>
#include <linux/pfn.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/list.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
#include <asm/setup.h>
#include <asm/tlbflush.h>
unsigned long vmalloc_end;
EXPORT_SYMBOL(vmalloc_end);
static struct page *vmem_map;
static DEFINE_MUTEX(vmem_mutex);
struct memory_segment {
struct list_head list;
unsigned long start;
unsigned long size;
};
static LIST_HEAD(mem_segs);
void memmap_init(unsigned long size, int nid, unsigned long zone,
unsigned long start_pfn)
{
struct page *start, *end;
struct page *map_start, *map_end;
int i;
start = pfn_to_page(start_pfn);
end = start + size;
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
unsigned long cstart, cend;
cstart = PFN_DOWN(memory_chunk[i].addr);
cend = cstart + PFN_DOWN(memory_chunk[i].size);
map_start = mem_map + cstart;
map_end = mem_map + cend;
if (map_start < start)
map_start = start;
if (map_end > end)
map_end = end;
map_start -= ((unsigned long) map_start & (PAGE_SIZE - 1))
/ sizeof(struct page);
map_end += ((PFN_ALIGN((unsigned long) map_end)
- (unsigned long) map_end)
/ sizeof(struct page));
if (map_start < map_end)
memmap_init_zone((unsigned long)(map_end - map_start),
nid, zone, page_to_pfn(map_start));
}
}
static inline void *vmem_alloc_pages(unsigned int order)
{
if (slab_is_available())
return (void *)__get_free_pages(GFP_KERNEL, order);
return alloc_bootmem_pages((1 << order) * PAGE_SIZE);
}
static inline pmd_t *vmem_pmd_alloc(void)
{
pmd_t *pmd;
int i;
pmd = vmem_alloc_pages(PMD_ALLOC_ORDER);
if (!pmd)
return NULL;
for (i = 0; i < PTRS_PER_PMD; i++)
pmd_clear(pmd + i);
return pmd;
}
static inline pte_t *vmem_pte_alloc(void)
{
pte_t *pte;
pte_t empty_pte;
int i;
pte = vmem_alloc_pages(PTE_ALLOC_ORDER);
if (!pte)
return NULL;
pte_val(empty_pte) = _PAGE_TYPE_EMPTY;
for (i = 0; i < PTRS_PER_PTE; i++)
set_pte(pte + i, empty_pte);
return pte;
}
/*
* Add a physical memory range to the 1:1 mapping.
*/
static int vmem_add_range(unsigned long start, unsigned long size)
{
unsigned long address;
pgd_t *pg_dir;
pmd_t *pm_dir;
pte_t *pt_dir;
pte_t pte;
int ret = -ENOMEM;
for (address = start; address < start + size; address += PAGE_SIZE) {
pg_dir = pgd_offset_k(address);
if (pgd_none(*pg_dir)) {
pm_dir = vmem_pmd_alloc();
if (!pm_dir)
goto out;
pgd_populate(&init_mm, pg_dir, pm_dir);
}
pm_dir = pmd_offset(pg_dir, address);
if (pmd_none(*pm_dir)) {
pt_dir = vmem_pte_alloc();
if (!pt_dir)
goto out;
pmd_populate_kernel(&init_mm, pm_dir, pt_dir);
}
pt_dir = pte_offset_kernel(pm_dir, address);
pte = pfn_pte(address >> PAGE_SHIFT, PAGE_KERNEL);
set_pte(pt_dir, pte);
}
ret = 0;
out:
flush_tlb_kernel_range(start, start + size);
return ret;
}
/*
* Remove a physical memory range from the 1:1 mapping.
* Currently only invalidates page table entries.
*/
static void vmem_remove_range(unsigned long start, unsigned long size)
{
unsigned long address;
pgd_t *pg_dir;
pmd_t *pm_dir;
pte_t *pt_dir;
pte_t pte;
pte_val(pte) = _PAGE_TYPE_EMPTY;
for (address = start; address < start + size; address += PAGE_SIZE) {
pg_dir = pgd_offset_k(address);
if (pgd_none(*pg_dir))
continue;
pm_dir = pmd_offset(pg_dir, address);
if (pmd_none(*pm_dir))
continue;
pt_dir = pte_offset_kernel(pm_dir, address);
set_pte(pt_dir, pte);
}
flush_tlb_kernel_range(start, start + size);
}
/*
* Add a backed mem_map array to the virtual mem_map array.
*/
static int vmem_add_mem_map(unsigned long start, unsigned long size)
{
unsigned long address, start_addr, end_addr;
struct page *map_start, *map_end;
pgd_t *pg_dir;
pmd_t *pm_dir;
pte_t *pt_dir;
pte_t pte;
int ret = -ENOMEM;
map_start = vmem_map + PFN_DOWN(start);
map_end = vmem_map + PFN_DOWN(start + size);
start_addr = (unsigned long) map_start & PAGE_MASK;
end_addr = PFN_ALIGN((unsigned long) map_end);
for (address = start_addr; address < end_addr; address += PAGE_SIZE) {
pg_dir = pgd_offset_k(address);
if (pgd_none(*pg_dir)) {
pm_dir = vmem_pmd_alloc();
if (!pm_dir)
goto out;
pgd_populate(&init_mm, pg_dir, pm_dir);
}
pm_dir = pmd_offset(pg_dir, address);
if (pmd_none(*pm_dir)) {
pt_dir = vmem_pte_alloc();
if (!pt_dir)
goto out;
pmd_populate_kernel(&init_mm, pm_dir, pt_dir);
}
pt_dir = pte_offset_kernel(pm_dir, address);
if (pte_none(*pt_dir)) {
unsigned long new_page;
new_page =__pa(vmem_alloc_pages(0));
if (!new_page)
goto out;
pte = pfn_pte(new_page >> PAGE_SHIFT, PAGE_KERNEL);
set_pte(pt_dir, pte);
}
}
ret = 0;
out:
flush_tlb_kernel_range(start_addr, end_addr);
return ret;
}
static int vmem_add_mem(unsigned long start, unsigned long size)
{
int ret;
ret = vmem_add_range(start, size);
if (ret)
return ret;
return vmem_add_mem_map(start, size);
}
/*
* Add memory segment to the segment list if it doesn't overlap with
* an already present segment.
*/
static int insert_memory_segment(struct memory_segment *seg)
{
struct memory_segment *tmp;
if (PFN_DOWN(seg->start + seg->size) > max_pfn ||
seg->start + seg->size < seg->start)
return -ERANGE;
list_for_each_entry(tmp, &mem_segs, list) {
if (seg->start >= tmp->start + tmp->size)
continue;
if (seg->start + seg->size <= tmp->start)
continue;
return -ENOSPC;
}
list_add(&seg->list, &mem_segs);
return 0;
}
/*
* Remove memory segment from the segment list.
*/
static void remove_memory_segment(struct memory_segment *seg)
{
list_del(&seg->list);
}
static void __remove_shared_memory(struct memory_segment *seg)
{
remove_memory_segment(seg);
vmem_remove_range(seg->start, seg->size);
}
int remove_shared_memory(unsigned long start, unsigned long size)
{
struct memory_segment *seg;
int ret;
mutex_lock(&vmem_mutex);
ret = -ENOENT;
list_for_each_entry(seg, &mem_segs, list) {
if (seg->start == start && seg->size == size)
break;
}
if (seg->start != start || seg->size != size)
goto out;
ret = 0;
__remove_shared_memory(seg);
kfree(seg);
out:
mutex_unlock(&vmem_mutex);
return ret;
}
int add_shared_memory(unsigned long start, unsigned long size)
{
struct memory_segment *seg;
struct page *page;
unsigned long pfn, num_pfn, end_pfn;
int ret;
mutex_lock(&vmem_mutex);
ret = -ENOMEM;
seg = kzalloc(sizeof(*seg), GFP_KERNEL);
if (!seg)
goto out;
seg->start = start;
seg->size = size;
ret = insert_memory_segment(seg);
if (ret)
goto out_free;
ret = vmem_add_mem(start, size);
if (ret)
goto out_remove;
pfn = PFN_DOWN(start);
num_pfn = PFN_DOWN(size);
end_pfn = pfn + num_pfn;
page = pfn_to_page(pfn);
memset(page, 0, num_pfn * sizeof(struct page));
for (; pfn < end_pfn; pfn++) {
page = pfn_to_page(pfn);
init_page_count(page);
reset_page_mapcount(page);
SetPageReserved(page);
INIT_LIST_HEAD(&page->lru);
}
goto out;
out_remove:
__remove_shared_memory(seg);
out_free:
kfree(seg);
out:
mutex_unlock(&vmem_mutex);
return ret;
}
/*
* map whole physical memory to virtual memory (identity mapping)
*/
void __init vmem_map_init(void)
{
unsigned long map_size;
int i;
map_size = ALIGN(max_low_pfn, MAX_ORDER_NR_PAGES) * sizeof(struct page);
vmalloc_end = PFN_ALIGN(VMALLOC_END_INIT) - PFN_ALIGN(map_size);
vmem_map = (struct page *) vmalloc_end;
NODE_DATA(0)->node_mem_map = vmem_map;
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++)
vmem_add_mem(memory_chunk[i].addr, memory_chunk[i].size);
}
/*
* Convert memory chunk array to a memory segment list so there is a single
* list that contains both r/w memory and shared memory segments.
*/
static int __init vmem_convert_memory_chunk(void)
{
struct memory_segment *seg;
int i;
mutex_lock(&vmem_mutex);
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
if (!memory_chunk[i].size)
continue;
seg = kzalloc(sizeof(*seg), GFP_KERNEL);
if (!seg)
panic("Out of memory...\n");
seg->start = memory_chunk[i].addr;
seg->size = memory_chunk[i].size;
insert_memory_segment(seg);
}
mutex_unlock(&vmem_mutex);
return 0;
}
core_initcall(vmem_convert_memory_chunk);

8
drivers/s390/block/dasd.c
View File

@ -1050,10 +1050,10 @@ dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
}
} else { /* error */
memcpy(&cqr->irb, irb, sizeof (struct irb));
#ifdef ERP_DEBUG
/* dump sense data */
dasd_log_sense(cqr, irb);
#endif
if (device->features & DASD_FEATURE_ERPLOG) {
/* dump sense data */
dasd_log_sense(cqr, irb);
}
switch (era) {
case dasd_era_fatal:
cqr->status = DASD_CQR_FAILED;

23
drivers/s390/block/dasd_3990_erp.c
View File

@ -2641,14 +2641,12 @@ dasd_3990_erp_action(struct dasd_ccw_req * cqr)
struct dasd_ccw_req *erp = NULL;
struct dasd_device *device = cqr->device;
__u32 cpa = cqr->irb.scsw.cpa;
struct dasd_ccw_req *temp_erp = NULL;
#ifdef ERP_DEBUG
/* print current erp_chain */
DEV_MESSAGE(KERN_ERR, device, "%s",
"ERP chain at BEGINNING of ERP-ACTION");
{
struct dasd_ccw_req *temp_erp = NULL;
if (device->features & DASD_FEATURE_ERPLOG) {
/* print current erp_chain */
DEV_MESSAGE(KERN_ERR, device, "%s",
"ERP chain at BEGINNING of ERP-ACTION");
for (temp_erp = cqr;
temp_erp != NULL; temp_erp = temp_erp->refers) {
@ -2658,7 +2656,6 @@ dasd_3990_erp_action(struct dasd_ccw_req * cqr)
temp_erp->refers);
}
}
#endif /* ERP_DEBUG */
/* double-check if current erp/cqr was successfull */
if ((cqr->irb.scsw.cstat == 0x00) &&
@ -2695,11 +2692,10 @@ dasd_3990_erp_action(struct dasd_ccw_req * cqr)
erp = dasd_3990_erp_handle_match_erp(cqr, erp);
}
#ifdef ERP_DEBUG
/* print current erp_chain */
DEV_MESSAGE(KERN_ERR, device, "%s", "ERP chain at END of ERP-ACTION");
{
struct dasd_ccw_req *temp_erp = NULL;
if (device->features & DASD_FEATURE_ERPLOG) {
/* print current erp_chain */
DEV_MESSAGE(KERN_ERR, device, "%s",
"ERP chain at END of ERP-ACTION");
for (temp_erp = erp;
temp_erp != NULL; temp_erp = temp_erp->refers) {
@ -2709,7 +2705,6 @@ dasd_3990_erp_action(struct dasd_ccw_req * cqr)
temp_erp->refers);
}
}
#endif /* ERP_DEBUG */
if (erp->status == DASD_CQR_FAILED)
dasd_log_ccw(erp, 1, cpa);

49
drivers/s390/block/dasd_devmap.c
View File

@ -202,6 +202,8 @@ dasd_feature_list(char *str, char **endp)
features |= DASD_FEATURE_READONLY;
else if (len == 4 && !strncmp(str, "diag", 4))
features |= DASD_FEATURE_USEDIAG;
else if (len == 6 && !strncmp(str, "erplog", 6))
features |= DASD_FEATURE_ERPLOG;
else {
MESSAGE(KERN_WARNING,
"unsupported feature: %*s, "
@ -709,6 +711,52 @@ dasd_ro_store(struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR(readonly, 0644, dasd_ro_show, dasd_ro_store);
/*
* erplog controls the logging of ERP related data
* (e.g. failing channel programs).
*/
static ssize_t
dasd_erplog_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct dasd_devmap *devmap;
int erplog;
devmap = dasd_find_busid(dev->bus_id);
if (!IS_ERR(devmap))
erplog = (devmap->features & DASD_FEATURE_ERPLOG) != 0;
else
erplog = (DASD_FEATURE_DEFAULT & DASD_FEATURE_ERPLOG) != 0;
return snprintf(buf, PAGE_SIZE, erplog ? "1\n" : "0\n");
}
static ssize_t
dasd_erplog_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct dasd_devmap *devmap;
int val;
char *endp;
devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
if (IS_ERR(devmap))
return PTR_ERR(devmap);
val = simple_strtoul(buf, &endp, 0);
if (((endp + 1) < (buf + count)) || (val > 1))
return -EINVAL;
spin_lock(&dasd_devmap_lock);
if (val)
devmap->features |= DASD_FEATURE_ERPLOG;
else
devmap->features &= ~DASD_FEATURE_ERPLOG;
if (devmap->device)
devmap->device->features = devmap->features;
spin_unlock(&dasd_devmap_lock);
return count;
}
static DEVICE_ATTR(erplog, 0644, dasd_erplog_show, dasd_erplog_store);
/*
* use_diag controls whether the driver should use diag rather than ssch
@ -896,6 +944,7 @@ static struct attribute * dasd_attrs[] = {
&dev_attr_uid.attr,
&dev_attr_use_diag.attr,
&dev_attr_eer_enabled.attr,
&dev_attr_erplog.attr,
NULL,
};

4
drivers/s390/block/dasd_int.h
View File

@ -13,10 +13,6 @@
#ifdef __KERNEL__
/* erp debugging in dasd.c and dasd_3990_erp.c */
#define ERP_DEBUG
/* we keep old device allocation scheme; IOW, minors are still in 0..255 */
#define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS))
#define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1)

9
drivers/s390/char/ctrlchar.c
View File

@ -16,14 +16,15 @@
#ifdef CONFIG_MAGIC_SYSRQ
static int ctrlchar_sysrq_key;
static struct tty_struct *sysrq_tty;
static void
ctrlchar_handle_sysrq(void *tty)
ctrlchar_handle_sysrq(struct work_struct *work)
{
handle_sysrq(ctrlchar_sysrq_key, (struct tty_struct *) tty);
handle_sysrq(ctrlchar_sysrq_key, sysrq_tty);
}
static DECLARE_WORK(ctrlchar_work, ctrlchar_handle_sysrq, NULL);
static DECLARE_WORK(ctrlchar_work, ctrlchar_handle_sysrq);
#endif
@ -53,7 +54,7 @@ ctrlchar_handle(const unsigned char *buf, int len, struct tty_struct *tty)
/* racy */
if (len == 3 && buf[1] == '-') {
ctrlchar_sysrq_key = buf[2];
ctrlchar_work.data = tty;
sysrq_tty = tty;
schedule_work(&ctrlchar_work);
return CTRLCHAR_SYSRQ;
}

3
drivers/s390/char/tape.h
View File

@ -179,6 +179,7 @@ struct tape_char_data {
/* Block Frontend Data */
struct tape_blk_data
{
struct tape_device * device;
/* Block device request queue. */
request_queue_t * request_queue;
spinlock_t request_queue_lock;
@ -240,7 +241,7 @@ struct tape_device {
#endif
/* Function to start or stop the next request later. */
struct work_struct tape_dnr;
struct delayed_work tape_dnr;
};
/* Externals from tape_core.c */

23
drivers/s390/char/tape_34xx.c
View File

@ -95,6 +95,12 @@ tape_34xx_medium_sense(struct tape_device *device)
return rc;
}
struct tape_34xx_work {
struct tape_device *device;
enum tape_op op;
struct work_struct work;
};
/*
* These functions are currently used only to schedule a medium_sense for
* later execution. This is because we get an interrupt whenever a medium
@ -103,13 +109,10 @@ tape_34xx_medium_sense(struct tape_device *device)
* interrupt handler.
*/
static void
tape_34xx_work_handler(void *data)
tape_34xx_work_handler(struct work_struct *work)
{
struct {
struct tape_device *device;
enum tape_op op;
struct work_struct work;
} *p = data;
struct tape_34xx_work *p =
container_of(work, struct tape_34xx_work, work);
switch(p->op) {
case TO_MSEN:
@ -126,17 +129,13 @@ tape_34xx_work_handler(void *data)
static int
tape_34xx_schedule_work(struct tape_device *device, enum tape_op op)
{
struct {
struct tape_device *device;
enum tape_op op;
struct work_struct work;
} *p;
struct tape_34xx_work *p;
if ((p = kmalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
return -ENOMEM;
memset(p, 0, sizeof(*p));
INIT_WORK(&p->work, tape_34xx_work_handler, p);
INIT_WORK(&p->work, tape_34xx_work_handler);
p->device = tape_get_device_reference(device);
p->op = op;

7
drivers/s390/char/tape_3590.c
View File

@ -236,9 +236,10 @@ struct work_handler_data {
};
static void
tape_3590_work_handler(void *data)
tape_3590_work_handler(struct work_struct *work)
{
struct work_handler_data *p = data;
struct work_handler_data *p =
container_of(work, struct work_handler_data, work);
switch (p->op) {
case TO_MSEN:
@ -263,7 +264,7 @@ tape_3590_schedule_work(struct tape_device *device, enum tape_op op)
if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
return -ENOMEM;
INIT_WORK(&p->work, tape_3590_work_handler, p);
INIT_WORK(&p->work, tape_3590_work_handler);
p->device = tape_get_device_reference(device);
p->op = op;

14
drivers/s390/char/tape_block.c
View File

@ -15,6 +15,7 @@
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/buffer_head.h>
#include <linux/kernel.h>
#include <asm/debug.h>
@ -143,7 +144,8 @@ tapeblock_start_request(struct tape_device *device, struct request *req)
* queue.
*/
static void
tapeblock_requeue(void *data) {
tapeblock_requeue(struct work_struct *work) {
struct tape_blk_data * blkdat;
struct tape_device * device;
request_queue_t * queue;
int nr_queued;
@ -151,7 +153,8 @@ tapeblock_requeue(void *data) {
struct list_head * l;
int rc;
device = (struct tape_device *) data;
blkdat = container_of(work, struct tape_blk_data, requeue_task);
device = blkdat->device;
if (!device)
return;
@ -212,6 +215,7 @@ tapeblock_setup_device(struct tape_device * device)
int rc;
blkdat = &device->blk_data;
blkdat->device = device;
spin_lock_init(&blkdat->request_queue_lock);
atomic_set(&blkdat->requeue_scheduled, 0);
@ -255,8 +259,8 @@ tapeblock_setup_device(struct tape_device * device)
add_disk(disk);
INIT_WORK(&blkdat->requeue_task, tapeblock_requeue,
tape_get_device_reference(device));
tape_get_device_reference(device);
INIT_WORK(&blkdat->requeue_task, tapeblock_requeue);
return 0;
@ -271,7 +275,7 @@ void
tapeblock_cleanup_device(struct tape_device *device)
{
flush_scheduled_work();
device->blk_data.requeue_task.data = tape_put_device(device);
tape_put_device(device);
if (!device->blk_data.disk) {
PRINT_ERR("(%s): No gendisk to clean up!\n",

14
drivers/s390/char/tape_core.c
View File

@ -28,7 +28,7 @@
#define PRINTK_HEADER "TAPE_CORE: "
static void __tape_do_irq (struct ccw_device *, unsigned long, struct irb *);
static void tape_delayed_next_request(void * data);
static void tape_delayed_next_request(struct work_struct *);
/*
* One list to contain all tape devices of all disciplines, so
@ -272,7 +272,7 @@ __tape_cancel_io(struct tape_device *device, struct tape_request *request)
return 0;
case -EBUSY:
request->status = TAPE_REQUEST_CANCEL;
schedule_work(&device->tape_dnr);
schedule_delayed_work(&device->tape_dnr, 0);
return 0;
case -ENODEV:
DBF_EXCEPTION(2, "device gone, retry\n");
@ -470,7 +470,7 @@ tape_alloc_device(void)
*device->modeset_byte = 0;
device->first_minor = -1;
atomic_set(&device->ref_count, 1);
INIT_WORK(&device->tape_dnr, tape_delayed_next_request, device);
INIT_DELAYED_WORK(&device->tape_dnr, tape_delayed_next_request);
return device;
}
@ -724,7 +724,7 @@ __tape_start_io(struct tape_device *device, struct tape_request *request)
} else if (rc == -EBUSY) {
/* The common I/O subsystem is currently busy. Retry later. */
request->status = TAPE_REQUEST_QUEUED;
schedule_work(&device->tape_dnr);
schedule_delayed_work(&device->tape_dnr, 0);
rc = 0;
} else {
/* Start failed. Remove request and indicate failure. */
@ -790,11 +790,11 @@ __tape_start_next_request(struct tape_device *device)
}
static void
tape_delayed_next_request(void *data)
tape_delayed_next_request(struct work_struct *work)
{
struct tape_device * device;
struct tape_device *device =
container_of(work, struct tape_device, tape_dnr.work);
device = (struct tape_device *) data;
DBF_LH(6, "tape_delayed_next_request(%p)\n", device);
spin_lock_irq(get_ccwdev_lock(device->cdev));
__tape_start_next_request(device);

28
drivers/s390/cio/chsc.c
View File

@ -183,7 +183,7 @@ css_get_ssd_info(struct subchannel *sch)
page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!page)
return -ENOMEM;
spin_lock_irq(&sch->lock);
spin_lock_irq(sch->lock);
ret = chsc_get_sch_desc_irq(sch, page);
if (ret) {
static int cio_chsc_err_msg;
@ -197,7 +197,7 @@ css_get_ssd_info(struct subchannel *sch)
cio_chsc_err_msg = 1;
}
}
spin_unlock_irq(&sch->lock);
spin_unlock_irq(sch->lock);
free_page((unsigned long)page);
if (!ret) {
int j, chpid, mask;
@ -233,7 +233,7 @@ s390_subchannel_remove_chpid(struct device *dev, void *data)
if (j >= 8)
return 0;
spin_lock_irq(&sch->lock);
spin_lock_irq(sch->lock);
stsch(sch->schid, &schib);
if (!schib.pmcw.dnv)
@ -265,10 +265,10 @@ s390_subchannel_remove_chpid(struct device *dev, void *data)
else if (sch->lpm == mask)
goto out_unreg;
out_unlock:
spin_unlock_irq(&sch->lock);
spin_unlock_irq(sch->lock);
return 0;
out_unreg:
spin_unlock_irq(&sch->lock);
spin_unlock_irq(sch->lock);
sch->lpm = 0;
if (css_enqueue_subchannel_slow(sch->schid)) {
css_clear_subchannel_slow_list();
@ -378,12 +378,12 @@ __s390_process_res_acc(struct subchannel_id schid, void *data)
/* Check if a subchannel is newly available. */
return s390_process_res_acc_new_sch(schid);
spin_lock_irq(&sch->lock);
spin_lock_irq(sch->lock);
chp_mask = s390_process_res_acc_sch(res_data, sch);
if (chp_mask == 0) {
spin_unlock_irq(&sch->lock);
spin_unlock_irq(sch->lock);
put_device(&sch->dev);
return 0;
}
@ -397,7 +397,7 @@ __s390_process_res_acc(struct subchannel_id schid, void *data)
else if (sch->driver && sch->driver->verify)
sch->driver->verify(&sch->dev);
spin_unlock_irq(&sch->lock);
spin_unlock_irq(sch->lock);
put_device(&sch->dev);
return 0;
}
@ -635,21 +635,21 @@ __chp_add(struct subchannel_id schid, void *data)
if (!sch)
/* Check if the subchannel is now available. */
return __chp_add_new_sch(schid);
spin_lock_irq(&sch->lock);
spin_lock_irq(sch->lock);
for (i=0; i<8; i++) {
mask = 0x80 >> i;
if ((sch->schib.pmcw.pim & mask) &&
(sch->schib.pmcw.chpid[i] == chp->id)) {
if (stsch(sch->schid, &sch->schib) != 0) {
/* Endgame. */
spin_unlock_irq(&sch->lock);
spin_unlock_irq(sch->lock);
return -ENXIO;
}
break;
}
}
if (i==8) {
spin_unlock_irq(&sch->lock);
spin_unlock_irq(sch->lock);
return 0;
}
sch->lpm = ((sch->schib.pmcw.pim &
@ -660,7 +660,7 @@ __chp_add(struct subchannel_id schid, void *data)
if (sch->driver && sch->driver->verify)
sch->driver->verify(&sch->dev);
spin_unlock_irq(&sch->lock);
spin_unlock_irq(sch->lock);
put_device(&sch->dev);
return 0;
}
@ -750,7 +750,7 @@ __s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
if (!sch->ssd_info.valid)
return;
spin_lock_irqsave(&sch->lock, flags);
spin_lock_irqsave(sch->lock, flags);
old_lpm = sch->lpm;
for (chp = 0; chp < 8; chp++) {
if (sch->ssd_info.chpid[chp] != chpid)
@ -785,7 +785,7 @@ __s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
sch->driver->verify(&sch->dev);
break;
}
spin_unlock_irqrestore(&sch->lock, flags);
spin_unlock_irqrestore(sch->lock, flags);
}
static int

62
drivers/s390/cio/cio.c
View File

@ -143,11 +143,11 @@ cio_tpi(void)
return 1;
local_bh_disable();
irq_enter ();
spin_lock(&sch->lock);
spin_lock(sch->lock);
memcpy (&sch->schib.scsw, &irb->scsw, sizeof (struct scsw));
if (sch->driver && sch->driver->irq)
sch->driver->irq(&sch->dev);
spin_unlock(&sch->lock);
spin_unlock(sch->lock);
irq_exit ();
_local_bh_enable();
return 1;
@ -415,6 +415,8 @@ cio_enable_subchannel (struct subchannel *sch, unsigned int isc)
CIO_TRACE_EVENT (2, "ensch");
CIO_TRACE_EVENT (2, sch->dev.bus_id);
if (sch_is_pseudo_sch(sch))
return -EINVAL;
ccode = stsch (sch->schid, &sch->schib);
if (ccode)
return -ENODEV;
@ -462,6 +464,8 @@ cio_disable_subchannel (struct subchannel *sch)
CIO_TRACE_EVENT (2, "dissch");
CIO_TRACE_EVENT (2, sch->dev.bus_id);
if (sch_is_pseudo_sch(sch))
return 0;
ccode = stsch (sch->schid, &sch->schib);
if (ccode == 3) /* Not operational. */
return -ENODEV;
@ -496,6 +500,15 @@ cio_disable_subchannel (struct subchannel *sch)
return ret;
}
int cio_create_sch_lock(struct subchannel *sch)
{
sch->lock = kmalloc(sizeof(spinlock_t), GFP_KERNEL);
if (!sch->lock)
return -ENOMEM;
spin_lock_init(sch->lock);
return 0;
}
/*
* cio_validate_subchannel()
*
@ -513,6 +526,7 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
{
char dbf_txt[15];
int ccode;
int err;
sprintf (dbf_txt, "valsch%x", schid.sch_no);
CIO_TRACE_EVENT (4, dbf_txt);
@ -520,9 +534,15 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
/* Nuke all fields. */
memset(sch, 0, sizeof(struct subchannel));
spin_lock_init(&sch->lock);
sch->schid = schid;
if (cio_is_console(schid)) {
sch->lock = cio_get_console_lock();
} else {
err = cio_create_sch_lock(sch);
if (err)
goto out;
}
mutex_init(&sch->reg_mutex);
/* Set a name for the subchannel */
snprintf (sch->dev.bus_id, BUS_ID_SIZE, "0.%x.%04x", schid.ssid,
schid.sch_no);
@ -534,10 +554,10 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
* is not valid.
*/
ccode = stsch_err (schid, &sch->schib);
if (ccode)
return (ccode == 3) ? -ENXIO : ccode;
sch->schid = schid;
if (ccode) {
err = (ccode == 3) ? -ENXIO : ccode;
goto out;
}
/* Copy subchannel type from path management control word. */
sch->st = sch->schib.pmcw.st;
@ -550,14 +570,16 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
"non-I/O subchannel type %04X\n",
sch->schid.ssid, sch->schid.sch_no, sch->st);
/* We stop here for non-io subchannels. */
return sch->st;
err = sch->st;
goto out;
}
/* Initialization for io subchannels. */
if (!sch->schib.pmcw.dnv)
if (!sch->schib.pmcw.dnv) {
/* io subchannel but device number is invalid. */
return -ENODEV;
err = -ENODEV;
goto out;
}
/* Devno is valid. */
if (is_blacklisted (sch->schid.ssid, sch->schib.pmcw.dev)) {
/*
@ -567,7 +589,8 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
CIO_MSG_EVENT(0, "Blacklisted device detected "
"at devno %04X, subchannel set %x\n",
sch->schib.pmcw.dev, sch->schid.ssid);
return -ENODEV;
err = -ENODEV;
goto out;
}
sch->opm = 0xff;
if (!cio_is_console(sch->schid))
@ -595,6 +618,11 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
if ((sch->lpm & (sch->lpm - 1)) != 0)
sch->schib.pmcw.mp = 1; /* multipath mode */
return 0;
out:
if (!cio_is_console(schid))
kfree(sch->lock);
sch->lock = NULL;
return err;
}
/*
@ -637,7 +665,7 @@ do_IRQ (struct pt_regs *regs)
}
sch = (struct subchannel *)(unsigned long)tpi_info->intparm;
if (sch)
spin_lock(&sch->lock);
spin_lock(sch->lock);
/* Store interrupt response block to lowcore. */
if (tsch (tpi_info->schid, irb) == 0 && sch) {
/* Keep subchannel information word up to date. */
@ -648,7 +676,7 @@ do_IRQ (struct pt_regs *regs)
sch->driver->irq(&sch->dev);
}
if (sch)
spin_unlock(&sch->lock);
spin_unlock(sch->lock);
/*
* Are more interrupts pending?
* If so, the tpi instruction will update the lowcore
@ -687,10 +715,10 @@ wait_cons_dev (void)
__ctl_load (cr6, 6, 6);
do {
spin_unlock(&console_subchannel.lock);
spin_unlock(console_subchannel.lock);
if (!cio_tpi())
cpu_relax();
spin_lock(&console_subchannel.lock);
spin_lock(console_subchannel.lock);
} while (console_subchannel.schib.scsw.actl != 0);
/*
* restore previous isc value

6
drivers/s390/cio/cio.h
View File

@ -87,7 +87,7 @@ struct orb {
/* subchannel data structure used by I/O subroutines */
struct subchannel {
struct subchannel_id schid;
spinlock_t lock; /* subchannel lock */
spinlock_t *lock; /* subchannel lock */
struct mutex reg_mutex;
enum {
SUBCHANNEL_TYPE_IO = 0,
@ -131,15 +131,19 @@ extern int cio_set_options (struct subchannel *, int);
extern int cio_get_options (struct subchannel *);
extern int cio_modify (struct subchannel *);
int cio_create_sch_lock(struct subchannel *);
/* Use with care. */
#ifdef CONFIG_CCW_CONSOLE
extern struct subchannel *cio_probe_console(void);
extern void cio_release_console(void);
extern int cio_is_console(struct subchannel_id);
extern struct subchannel *cio_get_console_subchannel(void);
extern spinlock_t * cio_get_console_lock(void);
#else
#define cio_is_console(schid) 0
#define cio_get_console_subchannel() NULL
#define cio_get_console_lock() NULL;
#endif
extern int cio_show_msg;

69
drivers/s390/cio/css.c
View File

@ -91,9 +91,9 @@ css_free_subchannel(struct subchannel *sch)
/* Reset intparm to zeroes. */
sch->schib.pmcw.intparm = 0;
cio_modify(sch);
kfree(sch->lock);
kfree(sch);
}
}
static void
@ -102,8 +102,10 @@ css_subchannel_release(struct device *dev)
struct subchannel *sch;
sch = to_subchannel(dev);
if (!cio_is_console(sch->schid))
if (!cio_is_console(sch->schid)) {
kfree(sch->lock);
kfree(sch);
}
}
extern int css_get_ssd_info(struct subchannel *sch);
@ -135,14 +137,16 @@ css_register_subchannel(struct subchannel *sch)
sch->dev.parent = &css[0]->device;
sch->dev.bus = &css_bus_type;
sch->dev.release = &css_subchannel_release;
sch->dev.groups = subch_attr_groups;
/* make it known to the system */
ret = css_sch_device_register(sch);
if (ret)
if (ret) {
printk (KERN_WARNING "%s: could not register %s\n",
__func__, sch->dev.bus_id);
else
css_get_ssd_info(sch);
return ret;
}
css_get_ssd_info(sch);
return ret;
}
@ -201,18 +205,18 @@ static int css_evaluate_known_subchannel(struct subchannel *sch, int slow)
unsigned long flags;
enum { NONE, UNREGISTER, UNREGISTER_PROBE, REPROBE } action;
spin_lock_irqsave(&sch->lock, flags);
spin_lock_irqsave(sch->lock, flags);
disc = device_is_disconnected(sch);
if (disc && slow) {
/* Disconnected devices are evaluated directly only.*/
spin_unlock_irqrestore(&sch->lock, flags);
spin_unlock_irqrestore(sch->lock, flags);
return 0;
}
/* No interrupt after machine check - kill pending timers. */
device_kill_pending_timer(sch);
if (!disc && !slow) {
/* Non-disconnected devices are evaluated on the slow path. */
spin_unlock_irqrestore(&sch->lock, flags);
spin_unlock_irqrestore(sch->lock, flags);
return -EAGAIN;
}
event = css_get_subchannel_status(sch);
@ -237,9 +241,9 @@ static int css_evaluate_known_subchannel(struct subchannel *sch, int slow)
/* Ask driver what to do with device. */
action = UNREGISTER;
if (sch->driver && sch->driver->notify) {
spin_unlock_irqrestore(&sch->lock, flags);
spin_unlock_irqrestore(sch->lock, flags);
ret = sch->driver->notify(&sch->dev, event);
spin_lock_irqsave(&sch->lock, flags);
spin_lock_irqsave(sch->lock, flags);
if (ret)
action = NONE;
}
@ -264,9 +268,9 @@ static int css_evaluate_known_subchannel(struct subchannel *sch, int slow)
case UNREGISTER:
case UNREGISTER_PROBE:
/* Unregister device (will use subchannel lock). */
spin_unlock_irqrestore(&sch->lock, flags);
spin_unlock_irqrestore(sch->lock, flags);
css_sch_device_unregister(sch);
spin_lock_irqsave(&sch->lock, flags);
spin_lock_irqsave(sch->lock, flags);
/* Reset intparm to zeroes. */
sch->schib.pmcw.intparm = 0;
@ -278,7 +282,7 @@ static int css_evaluate_known_subchannel(struct subchannel *sch, int slow)
default:
break;
}
spin_unlock_irqrestore(&sch->lock, flags);
spin_unlock_irqrestore(sch->lock, flags);
/* Probe if necessary. */
if (action == UNREGISTER_PROBE)
ret = css_probe_device(sch->schid);
@ -573,12 +577,24 @@ css_cm_enable_store(struct device *dev, struct device_attribute *attr,
static DEVICE_ATTR(cm_enable, 0644, css_cm_enable_show, css_cm_enable_store);
static inline void __init
setup_css(int nr)
static inline int __init setup_css(int nr)
{
u32 tod_high;
int ret;
memset(css[nr], 0, sizeof(struct channel_subsystem));
css[nr]->pseudo_subchannel =
kzalloc(sizeof(*css[nr]->pseudo_subchannel), GFP_KERNEL);
if (!css[nr]->pseudo_subchannel)
return -ENOMEM;
css[nr]->pseudo_subchannel->dev.parent = &css[nr]->device;
css[nr]->pseudo_subchannel->dev.release = css_subchannel_release;
sprintf(css[nr]->pseudo_subchannel->dev.bus_id, "defunct");
ret = cio_create_sch_lock(css[nr]->pseudo_subchannel);
if (ret) {
kfree(css[nr]->pseudo_subchannel);
return ret;
}
mutex_init(&css[nr]->mutex);
css[nr]->valid = 1;
css[nr]->cssid = nr;
@ -586,6 +602,7 @@ setup_css(int nr)
css[nr]->device.release = channel_subsystem_release;
tod_high = (u32) (get_clock() >> 32);
css_generate_pgid(css[nr], tod_high);
return 0;
}
/*
@ -622,10 +639,12 @@ init_channel_subsystem (void)
ret = -ENOMEM;
goto out_unregister;
}
setup_css(i);
ret = device_register(&css[i]->device);
ret = setup_css(i);
if (ret)
goto out_free;
ret = device_register(&css[i]->device);
if (ret)
goto out_free_all;
if (css_characteristics_avail &&
css_chsc_characteristics.secm) {
ret = device_create_file(&css[i]->device,
@ -633,6 +652,9 @@ init_channel_subsystem (void)
if (ret)
goto out_device;
}
ret = device_register(&css[i]->pseudo_subchannel->dev);
if (ret)
goto out_file;
}
css_init_done = 1;
@ -640,13 +662,19 @@ init_channel_subsystem (void)
for_each_subchannel(__init_channel_subsystem, NULL);
return 0;
out_file:
device_remove_file(&css[i]->device, &dev_attr_cm_enable);
out_device:
device_unregister(&css[i]->device);
out_free_all:
kfree(css[i]->pseudo_subchannel->lock);
kfree(css[i]->pseudo_subchannel);
out_free:
kfree(css[i]);
out_unregister:
while (i > 0) {
i--;
device_unregister(&css[i]->pseudo_subchannel->dev);
if (css_characteristics_avail && css_chsc_characteristics.secm)
device_remove_file(&css[i]->device,
&dev_attr_cm_enable);
@ -658,6 +686,11 @@ out:
return ret;
}
int sch_is_pseudo_sch(struct subchannel *sch)
{
return sch == to_css(sch->dev.parent)->pseudo_subchannel;
}
/*
* find a driver for a subchannel. They identify by the subchannel
* type with the exception that the console subchannel driver has its own

9
drivers/s390/cio/css.h
View File

@ -73,6 +73,8 @@ struct senseid {
} __attribute__ ((packed,aligned(4)));
struct ccw_device_private {
struct ccw_device *cdev;
struct subchannel *sch;
int state; /* device state */
atomic_t onoff;
unsigned long registered;
@ -158,6 +160,8 @@ struct channel_subsystem {
int cm_enabled;
void *cub_addr1;
void *cub_addr2;
/* for orphaned ccw devices */
struct subchannel *pseudo_subchannel;
};
#define to_css(dev) container_of(dev, struct channel_subsystem, device)
@ -185,6 +189,11 @@ void css_clear_subchannel_slow_list(void);
int css_slow_subchannels_exist(void);
extern int need_rescan;
int sch_is_pseudo_sch(struct subchannel *);
extern struct workqueue_struct *slow_path_wq;
extern struct work_struct slow_path_work;
int subchannel_add_files (struct device *);
extern struct attribute_group *subch_attr_groups[];
#endif

456
drivers/s390/cio/device.c
View File

@ -23,6 +23,7 @@
#include <asm/param.h> /* HZ */
#include "cio.h"
#include "cio_debug.h"
#include "css.h"
#include "device.h"
#include "ioasm.h"
@ -234,9 +235,11 @@ chpids_show (struct device * dev, struct device_attribute *attr, char * buf)
ssize_t ret = 0;
int chp;
for (chp = 0; chp < 8; chp++)
ret += sprintf (buf+ret, "%02x ", ssd->chpid[chp]);
if (ssd)
for (chp = 0; chp < 8; chp++)
ret += sprintf (buf+ret, "%02x ", ssd->chpid[chp]);
else
ret += sprintf (buf, "n/a");
ret += sprintf (buf+ret, "\n");
return min((ssize_t)PAGE_SIZE, ret);
}
@ -294,14 +297,44 @@ online_show (struct device *dev, struct device_attribute *attr, char *buf)
return sprintf(buf, cdev->online ? "1\n" : "0\n");
}
int ccw_device_is_orphan(struct ccw_device *cdev)
{
return sch_is_pseudo_sch(to_subchannel(cdev->dev.parent));
}
static void ccw_device_unregister(struct work_struct *work)
{
struct ccw_device_private *priv;
struct ccw_device *cdev;
priv = container_of(work, struct ccw_device_private, kick_work);
cdev = priv->cdev;
if (test_and_clear_bit(1, &cdev->private->registered))
device_unregister(&cdev->dev);
put_device(&cdev->dev);
}
static void
ccw_device_remove_disconnected(struct ccw_device *cdev)
{
struct subchannel *sch;
unsigned long flags;
/*
* Forced offline in disconnected state means
* 'throw away device'.
*/
if (ccw_device_is_orphan(cdev)) {
/* Deregister ccw device. */
spin_lock_irqsave(cdev->ccwlock, flags);
cdev->private->state = DEV_STATE_NOT_OPER;
spin_unlock_irqrestore(cdev->ccwlock, flags);
if (get_device(&cdev->dev)) {
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_unregister);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
return ;
}
sch = to_subchannel(cdev->dev.parent);
css_sch_device_unregister(sch);
/* Reset intparm to zeroes. */
@ -462,6 +495,8 @@ available_show (struct device *dev, struct device_attribute *attr, char *buf)
struct ccw_device *cdev = to_ccwdev(dev);
struct subchannel *sch;
if (ccw_device_is_orphan(cdev))
return sprintf(buf, "no device\n");
switch (cdev->private->state) {
case DEV_STATE_BOXED:
return sprintf(buf, "boxed\n");
@ -498,11 +533,10 @@ static struct attribute_group subch_attr_group = {
.attrs = subch_attrs,
};
static inline int
subchannel_add_files (struct device *dev)
{
return sysfs_create_group(&dev->kobj, &subch_attr_group);
}
struct attribute_group *subch_attr_groups[] = {
&subch_attr_group,
NULL,
};
static struct attribute * ccwdev_attrs[] = {
&dev_attr_devtype.attr,
@ -563,11 +597,10 @@ match_devno(struct device * dev, void * data)
cdev = to_ccwdev(dev);
if ((cdev->private->state == DEV_STATE_DISCONNECTED) &&
!ccw_device_is_orphan(cdev) &&
ccw_dev_id_is_equal(&cdev->private->dev_id, &d->dev_id) &&
(cdev != d->sibling)) {
cdev->private->state = DEV_STATE_NOT_OPER;
(cdev != d->sibling))
return 1;
}
return 0;
}
@ -584,13 +617,36 @@ static struct ccw_device * get_disc_ccwdev_by_dev_id(struct ccw_dev_id *dev_id,
return dev ? to_ccwdev(dev) : NULL;
}
static void
ccw_device_add_changed(void *data)
static int match_orphan(struct device *dev, void *data)
{
struct ccw_dev_id *dev_id;
struct ccw_device *cdev;
cdev = data;
dev_id = data;
cdev = to_ccwdev(dev);
return ccw_dev_id_is_equal(&cdev->private->dev_id, dev_id);
}
static struct ccw_device *
get_orphaned_ccwdev_by_dev_id(struct channel_subsystem *css,
struct ccw_dev_id *dev_id)
{
struct device *dev;
dev = device_find_child(&css->pseudo_subchannel->dev, dev_id,
match_orphan);
return dev ? to_ccwdev(dev) : NULL;
}
static void
ccw_device_add_changed(struct work_struct *work)
{
struct ccw_device_private *priv;
struct ccw_device *cdev;
priv = container_of(work, struct ccw_device_private, kick_work);
cdev = priv->cdev;
if (device_add(&cdev->dev)) {
put_device(&cdev->dev);
return;
@ -602,64 +658,21 @@ ccw_device_add_changed(void *data)
}
}
extern int css_get_ssd_info(struct subchannel *sch);
void
ccw_device_do_unreg_rereg(void *data)
void ccw_device_do_unreg_rereg(struct work_struct *work)
{
struct ccw_device_private *priv;
struct ccw_device *cdev;
struct subchannel *sch;
int need_rename;
cdev = data;
priv = container_of(work, struct ccw_device_private, kick_work);
cdev = priv->cdev;
sch = to_subchannel(cdev->dev.parent);
if (cdev->private->dev_id.devno != sch->schib.pmcw.dev) {
/*
* The device number has changed. This is usually only when
* a device has been detached under VM and then re-appeared
* on another subchannel because of a different attachment
* order than before. Ideally, we should should just switch
* subchannels, but unfortunately, this is not possible with
* the current implementation.
* Instead, we search for the old subchannel for this device
* number and deregister so there are no collisions with the
* newly registered ccw_device.
* FIXME: Find another solution so the block layer doesn't
* get possibly sick...
*/
struct ccw_device *other_cdev;
struct ccw_dev_id dev_id;
need_rename = 1;
dev_id.devno = sch->schib.pmcw.dev;
dev_id.ssid = sch->schid.ssid;
other_cdev = get_disc_ccwdev_by_dev_id(&dev_id, cdev);
if (other_cdev) {
struct subchannel *other_sch;
other_sch = to_subchannel(other_cdev->dev.parent);
if (get_device(&other_sch->dev)) {
stsch(other_sch->schid, &other_sch->schib);
if (other_sch->schib.pmcw.dnv) {
other_sch->schib.pmcw.intparm = 0;
cio_modify(other_sch);
}
css_sch_device_unregister(other_sch);
}
}
/* Update ssd info here. */
css_get_ssd_info(sch);
cdev->private->dev_id.devno = sch->schib.pmcw.dev;
} else
need_rename = 0;
device_remove_files(&cdev->dev);
if (test_and_clear_bit(1, &cdev->private->registered))
device_del(&cdev->dev);
if (need_rename)
snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.%x.%04x",
sch->schid.ssid, sch->schib.pmcw.dev);
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_add_changed, cdev);
ccw_device_add_changed);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
@ -673,18 +686,194 @@ ccw_device_release(struct device *dev)
kfree(cdev);
}
static struct ccw_device * io_subchannel_allocate_dev(struct subchannel *sch)
{
struct ccw_device *cdev;
cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
if (cdev) {
cdev->private = kzalloc(sizeof(struct ccw_device_private),
GFP_KERNEL | GFP_DMA);
if (cdev->private)
return cdev;
}
kfree(cdev);
return ERR_PTR(-ENOMEM);
}
static int io_subchannel_initialize_dev(struct subchannel *sch,
struct ccw_device *cdev)
{
cdev->private->cdev = cdev;
atomic_set(&cdev->private->onoff, 0);
cdev->dev.parent = &sch->dev;
cdev->dev.release = ccw_device_release;
INIT_LIST_HEAD(&cdev->private->kick_work.entry);
/* Do first half of device_register. */
device_initialize(&cdev->dev);
if (!get_device(&sch->dev)) {
if (cdev->dev.release)
cdev->dev.release(&cdev->dev);
return -ENODEV;
}
return 0;
}
static struct ccw_device * io_subchannel_create_ccwdev(struct subchannel *sch)
{
struct ccw_device *cdev;
int ret;
cdev = io_subchannel_allocate_dev(sch);
if (!IS_ERR(cdev)) {
ret = io_subchannel_initialize_dev(sch, cdev);
if (ret) {
kfree(cdev);
cdev = ERR_PTR(ret);
}
}
return cdev;
}
static int io_subchannel_recog(struct ccw_device *, struct subchannel *);
static void sch_attach_device(struct subchannel *sch,
struct ccw_device *cdev)
{
spin_lock_irq(sch->lock);
sch->dev.driver_data = cdev;
cdev->private->schid = sch->schid;
cdev->ccwlock = sch->lock;
device_trigger_reprobe(sch);
spin_unlock_irq(sch->lock);
}
static void sch_attach_disconnected_device(struct subchannel *sch,
struct ccw_device *cdev)
{
struct subchannel *other_sch;
int ret;
other_sch = to_subchannel(get_device(cdev->dev.parent));
ret = device_move(&cdev->dev, &sch->dev);
if (ret) {
CIO_MSG_EVENT(2, "Moving disconnected device 0.%x.%04x failed "
"(ret=%d)!\n", cdev->private->dev_id.ssid,
cdev->private->dev_id.devno, ret);
put_device(&other_sch->dev);
return;
}
other_sch->dev.driver_data = NULL;
/* No need to keep a subchannel without ccw device around. */
css_sch_device_unregister(other_sch);
put_device(&other_sch->dev);
sch_attach_device(sch, cdev);
}
static void sch_attach_orphaned_device(struct subchannel *sch,
struct ccw_device *cdev)
{
int ret;
/* Try to move the ccw device to its new subchannel. */
ret = device_move(&cdev->dev, &sch->dev);
if (ret) {
CIO_MSG_EVENT(0, "Moving device 0.%x.%04x from orphanage "
"failed (ret=%d)!\n",
cdev->private->dev_id.ssid,
cdev->private->dev_id.devno, ret);
return;
}
sch_attach_device(sch, cdev);
}
static void sch_create_and_recog_new_device(struct subchannel *sch)
{
struct ccw_device *cdev;
/* Need to allocate a new ccw device. */
cdev = io_subchannel_create_ccwdev(sch);
if (IS_ERR(cdev)) {
/* OK, we did everything we could... */
css_sch_device_unregister(sch);
return;
}
spin_lock_irq(sch->lock);
sch->dev.driver_data = cdev;
spin_unlock_irq(sch->lock);
/* Start recognition for the new ccw device. */
if (io_subchannel_recog(cdev, sch)) {
spin_lock_irq(sch->lock);
sch->dev.driver_data = NULL;
spin_unlock_irq(sch->lock);
if (cdev->dev.release)
cdev->dev.release(&cdev->dev);
css_sch_device_unregister(sch);
}
}
void ccw_device_move_to_orphanage(struct work_struct *work)
{
struct ccw_device_private *priv;
struct ccw_device *cdev;
struct ccw_device *replacing_cdev;
struct subchannel *sch;
int ret;
struct channel_subsystem *css;
struct ccw_dev_id dev_id;
priv = container_of(work, struct ccw_device_private, kick_work);
cdev = priv->cdev;
sch = to_subchannel(cdev->dev.parent);
css = to_css(sch->dev.parent);
dev_id.devno = sch->schib.pmcw.dev;
dev_id.ssid = sch->schid.ssid;
/*
* Move the orphaned ccw device to the orphanage so the replacing
* ccw device can take its place on the subchannel.
*/
ret = device_move(&cdev->dev, &css->pseudo_subchannel->dev);
if (ret) {
CIO_MSG_EVENT(0, "Moving device 0.%x.%04x to orphanage failed "
"(ret=%d)!\n", cdev->private->dev_id.ssid,
cdev->private->dev_id.devno, ret);
return;
}
cdev->ccwlock = css->pseudo_subchannel->lock;
/*
* Search for the replacing ccw device
* - among the disconnected devices
* - in the orphanage
*/
replacing_cdev = get_disc_ccwdev_by_dev_id(&dev_id, cdev);
if (replacing_cdev) {
sch_attach_disconnected_device(sch, replacing_cdev);
return;
}
replacing_cdev = get_orphaned_ccwdev_by_dev_id(css, &dev_id);
if (replacing_cdev) {
sch_attach_orphaned_device(sch, replacing_cdev);
return;
}
sch_create_and_recog_new_device(sch);
}
/*
* Register recognized device.
*/
static void
io_subchannel_register(void *data)
io_subchannel_register(struct work_struct *work)
{
struct ccw_device_private *priv;
struct ccw_device *cdev;
struct subchannel *sch;
int ret;
unsigned long flags;
cdev = data;
priv = container_of(work, struct ccw_device_private, kick_work);
cdev = priv->cdev;
sch = to_subchannel(cdev->dev.parent);
/*
@ -709,9 +898,9 @@ io_subchannel_register(void *data)
printk (KERN_WARNING "%s: could not register %s\n",
__func__, cdev->dev.bus_id);
put_device(&cdev->dev);
spin_lock_irqsave(&sch->lock, flags);
spin_lock_irqsave(sch->lock, flags);
sch->dev.driver_data = NULL;
spin_unlock_irqrestore(&sch->lock, flags);
spin_unlock_irqrestore(sch->lock, flags);
kfree (cdev->private);
kfree (cdev);
put_device(&sch->dev);
@ -719,11 +908,6 @@ io_subchannel_register(void *data)
wake_up(&ccw_device_init_wq);
return;
}
ret = subchannel_add_files(cdev->dev.parent);
if (ret)
printk(KERN_WARNING "%s: could not add attributes to %s\n",
__func__, sch->dev.bus_id);
put_device(&cdev->dev);
out:
cdev->private->flags.recog_done = 1;
@ -734,11 +918,14 @@ out:
}
void
ccw_device_call_sch_unregister(void *data)
ccw_device_call_sch_unregister(struct work_struct *work)
{
struct ccw_device *cdev = data;
struct ccw_device_private *priv;
struct ccw_device *cdev;
struct subchannel *sch;
priv = container_of(work, struct ccw_device_private, kick_work);
cdev = priv->cdev;
sch = to_subchannel(cdev->dev.parent);
css_sch_device_unregister(sch);
/* Reset intparm to zeroes. */
@ -768,7 +955,7 @@ io_subchannel_recog_done(struct ccw_device *cdev)
break;
sch = to_subchannel(cdev->dev.parent);
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_call_sch_unregister, cdev);
ccw_device_call_sch_unregister);
queue_work(slow_path_wq, &cdev->private->kick_work);
if (atomic_dec_and_test(&ccw_device_init_count))
wake_up(&ccw_device_init_wq);
@ -783,7 +970,7 @@ io_subchannel_recog_done(struct ccw_device *cdev)
if (!get_device(&cdev->dev))
break;
PREPARE_WORK(&cdev->private->kick_work,
io_subchannel_register, cdev);
io_subchannel_register);
queue_work(slow_path_wq, &cdev->private->kick_work);
break;
}
@ -797,7 +984,7 @@ io_subchannel_recog(struct ccw_device *cdev, struct subchannel *sch)
sch->dev.driver_data = cdev;
sch->driver = &io_subchannel_driver;
cdev->ccwlock = &sch->lock;
cdev->ccwlock = sch->lock;
/* Init private data. */
priv = cdev->private;
@ -817,9 +1004,9 @@ io_subchannel_recog(struct ccw_device *cdev, struct subchannel *sch)
atomic_inc(&ccw_device_init_count);
/* Start async. device sensing. */
spin_lock_irq(&sch->lock);
spin_lock_irq(sch->lock);
rc = ccw_device_recognition(cdev);
spin_unlock_irq(&sch->lock);
spin_unlock_irq(sch->lock);
if (rc) {
if (atomic_dec_and_test(&ccw_device_init_count))
wake_up(&ccw_device_init_wq);
@ -827,12 +1014,55 @@ io_subchannel_recog(struct ccw_device *cdev, struct subchannel *sch)
return rc;
}
static void ccw_device_move_to_sch(struct work_struct *work)
{
struct ccw_device_private *priv;
int rc;
struct subchannel *sch;
struct ccw_device *cdev;
struct subchannel *former_parent;
priv = container_of(work, struct ccw_device_private, kick_work);
sch = priv->sch;
cdev = priv->cdev;
former_parent = ccw_device_is_orphan(cdev) ?
NULL : to_subchannel(get_device(cdev->dev.parent));
mutex_lock(&sch->reg_mutex);
/* Try to move the ccw device to its new subchannel. */
rc = device_move(&cdev->dev, &sch->dev);
mutex_unlock(&sch->reg_mutex);
if (rc) {
CIO_MSG_EVENT(2, "Moving device 0.%x.%04x to subchannel "
"0.%x.%04x failed (ret=%d)!\n",
cdev->private->dev_id.ssid,
cdev->private->dev_id.devno, sch->schid.ssid,
sch->schid.sch_no, rc);
css_sch_device_unregister(sch);
goto out;
}
if (former_parent) {
spin_lock_irq(former_parent->lock);
former_parent->dev.driver_data = NULL;
spin_unlock_irq(former_parent->lock);
css_sch_device_unregister(former_parent);
/* Reset intparm to zeroes. */
former_parent->schib.pmcw.intparm = 0;
cio_modify(former_parent);
}
sch_attach_device(sch, cdev);
out:
if (former_parent)
put_device(&former_parent->dev);
put_device(&cdev->dev);
}
static int
io_subchannel_probe (struct subchannel *sch)
{
struct ccw_device *cdev;
int rc;
unsigned long flags;
struct ccw_dev_id dev_id;
if (sch->dev.driver_data) {
/*
@ -843,7 +1073,6 @@ io_subchannel_probe (struct subchannel *sch)
cdev = sch->dev.driver_data;
device_initialize(&cdev->dev);
ccw_device_register(cdev);
subchannel_add_files(&sch->dev);
/*
* Check if the device is already online. If it is
* the reference count needs to be corrected
@ -856,33 +1085,37 @@ io_subchannel_probe (struct subchannel *sch)
get_device(&cdev->dev);
return 0;
}
cdev = kzalloc (sizeof(*cdev), GFP_KERNEL);
/*
* First check if a fitting device may be found amongst the
* disconnected devices or in the orphanage.
*/
dev_id.devno = sch->schib.pmcw.dev;
dev_id.ssid = sch->schid.ssid;
cdev = get_disc_ccwdev_by_dev_id(&dev_id, NULL);
if (!cdev)
return -ENOMEM;
cdev->private = kzalloc(sizeof(struct ccw_device_private),
GFP_KERNEL | GFP_DMA);
if (!cdev->private) {
kfree(cdev);
return -ENOMEM;
}
atomic_set(&cdev->private->onoff, 0);
cdev->dev.parent = &sch->dev;
cdev->dev.release = ccw_device_release;
INIT_LIST_HEAD(&cdev->private->kick_work.entry);
/* Do first half of device_register. */
device_initialize(&cdev->dev);
if (!get_device(&sch->dev)) {
if (cdev->dev.release)
cdev->dev.release(&cdev->dev);
return -ENODEV;
cdev = get_orphaned_ccwdev_by_dev_id(to_css(sch->dev.parent),
&dev_id);
if (cdev) {
/*
* Schedule moving the device until when we have a registered
* subchannel to move to and succeed the probe. We can
* unregister later again, when the probe is through.
*/
cdev->private->sch = sch;
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_move_to_sch);
queue_work(slow_path_wq, &cdev->private->kick_work);
return 0;
}
cdev = io_subchannel_create_ccwdev(sch);
if (IS_ERR(cdev))
return PTR_ERR(cdev);
rc = io_subchannel_recog(cdev, sch);
if (rc) {
spin_lock_irqsave(&sch->lock, flags);
spin_lock_irqsave(sch->lock, flags);
sch->dev.driver_data = NULL;
spin_unlock_irqrestore(&sch->lock, flags);
spin_unlock_irqrestore(sch->lock, flags);
if (cdev->dev.release)
cdev->dev.release(&cdev->dev);
}
@ -890,17 +1123,6 @@ io_subchannel_probe (struct subchannel *sch)
return rc;
}
static void
ccw_device_unregister(void *data)
{
struct ccw_device *cdev;
cdev = (struct ccw_device *)data;
if (test_and_clear_bit(1, &cdev->private->registered))
device_unregister(&cdev->dev);
put_device(&cdev->dev);
}
static int
io_subchannel_remove (struct subchannel *sch)
{
@ -921,7 +1143,7 @@ io_subchannel_remove (struct subchannel *sch)
*/
if (get_device(&cdev->dev)) {
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_unregister, cdev);
ccw_device_unregister);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
return 0;
@ -1003,6 +1225,13 @@ static struct ccw_device console_cdev;
static struct ccw_device_private console_private;
static int console_cdev_in_use;
static DEFINE_SPINLOCK(ccw_console_lock);
spinlock_t * cio_get_console_lock(void)
{
return &ccw_console_lock;
}
static int
ccw_device_console_enable (struct ccw_device *cdev, struct subchannel *sch)
{
@ -1048,6 +1277,7 @@ ccw_device_probe_console(void)
memset(&console_cdev, 0, sizeof(struct ccw_device));
memset(&console_private, 0, sizeof(struct ccw_device_private));
console_cdev.private = &console_private;
console_private.cdev = &console_cdev;
ret = ccw_device_console_enable(&console_cdev, sch);
if (ret) {
cio_release_console();

6
drivers/s390/cio/device.h
View File

@ -78,8 +78,10 @@ void io_subchannel_recog_done(struct ccw_device *cdev);
int ccw_device_cancel_halt_clear(struct ccw_device *);
void ccw_device_do_unreg_rereg(void *);
void ccw_device_call_sch_unregister(void *);
void ccw_device_do_unreg_rereg(struct work_struct *);
void ccw_device_call_sch_unregister(struct work_struct *);
void ccw_device_move_to_orphanage(struct work_struct *);
int ccw_device_is_orphan(struct ccw_device *);
int ccw_device_recognition(struct ccw_device *);
int ccw_device_online(struct ccw_device *);

58
drivers/s390/cio/device_fsm.c
View File

@ -186,15 +186,14 @@ ccw_device_handle_oper(struct ccw_device *cdev)
/*
* Check if cu type and device type still match. If
* not, it is certainly another device and we have to
* de- and re-register. Also check here for non-matching devno.
* de- and re-register.
*/
if (cdev->id.cu_type != cdev->private->senseid.cu_type ||
cdev->id.cu_model != cdev->private->senseid.cu_model ||
cdev->id.dev_type != cdev->private->senseid.dev_type ||
cdev->id.dev_model != cdev->private->senseid.dev_model ||
cdev->private->dev_id.devno != sch->schib.pmcw.dev) {
cdev->id.dev_model != cdev->private->senseid.dev_model) {
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_do_unreg_rereg, cdev);
ccw_device_do_unreg_rereg);
queue_work(ccw_device_work, &cdev->private->kick_work);
return 0;
}
@ -329,19 +328,21 @@ ccw_device_sense_id_done(struct ccw_device *cdev, int err)
}
static void
ccw_device_oper_notify(void *data)
ccw_device_oper_notify(struct work_struct *work)
{
struct ccw_device_private *priv;
struct ccw_device *cdev;
struct subchannel *sch;
int ret;
cdev = data;
priv = container_of(work, struct ccw_device_private, kick_work);
cdev = priv->cdev;
sch = to_subchannel(cdev->dev.parent);
ret = (sch->driver && sch->driver->notify) ?
sch->driver->notify(&sch->dev, CIO_OPER) : 0;
if (!ret)
/* Driver doesn't want device back. */
ccw_device_do_unreg_rereg(cdev);
ccw_device_do_unreg_rereg(work);
else {
/* Reenable channel measurements, if needed. */
cmf_reenable(cdev);
@ -377,8 +378,7 @@ ccw_device_done(struct ccw_device *cdev, int state)
if (cdev->private->flags.donotify) {
cdev->private->flags.donotify = 0;
PREPARE_WORK(&cdev->private->kick_work, ccw_device_oper_notify,
cdev);
PREPARE_WORK(&cdev->private->kick_work, ccw_device_oper_notify);
queue_work(ccw_device_notify_work, &cdev->private->kick_work);
}
wake_up(&cdev->private->wait_q);
@ -528,13 +528,15 @@ ccw_device_recog_timeout(struct ccw_device *cdev, enum dev_event dev_event)
static void
ccw_device_nopath_notify(void *data)
ccw_device_nopath_notify(struct work_struct *work)
{
struct ccw_device_private *priv;
struct ccw_device *cdev;
struct subchannel *sch;
int ret;
cdev = data;
priv = container_of(work, struct ccw_device_private, kick_work);
cdev = priv->cdev;
sch = to_subchannel(cdev->dev.parent);
/* Extra sanity. */
if (sch->lpm)
@ -547,8 +549,7 @@ ccw_device_nopath_notify(void *data)
cio_disable_subchannel(sch);
if (get_device(&cdev->dev)) {
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_call_sch_unregister,
cdev);
ccw_device_call_sch_unregister);
queue_work(ccw_device_work,
&cdev->private->kick_work);
} else
@ -607,7 +608,7 @@ ccw_device_verify_done(struct ccw_device *cdev, int err)
/* Reset oper notify indication after verify error. */
cdev->private->flags.donotify = 0;
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_nopath_notify, cdev);
ccw_device_nopath_notify);
queue_work(ccw_device_notify_work, &cdev->private->kick_work);
ccw_device_done(cdev, DEV_STATE_NOT_OPER);
break;
@ -674,6 +675,10 @@ ccw_device_offline(struct ccw_device *cdev)
{
struct subchannel *sch;
if (ccw_device_is_orphan(cdev)) {
ccw_device_done(cdev, DEV_STATE_OFFLINE);
return 0;
}
sch = to_subchannel(cdev->dev.parent);
if (stsch(sch->schid, &sch->schib) || !sch->schib.pmcw.dnv)
return -ENODEV;
@ -738,7 +743,7 @@ ccw_device_offline_notoper(struct ccw_device *cdev, enum dev_event dev_event)
sch = to_subchannel(cdev->dev.parent);
if (get_device(&cdev->dev)) {
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_call_sch_unregister, cdev);
ccw_device_call_sch_unregister);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
wake_up(&cdev->private->wait_q);
@ -769,7 +774,7 @@ ccw_device_online_notoper(struct ccw_device *cdev, enum dev_event dev_event)
}
if (get_device(&cdev->dev)) {
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_call_sch_unregister, cdev);
ccw_device_call_sch_unregister);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
wake_up(&cdev->private->wait_q);
@ -874,7 +879,7 @@ ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event)
sch = to_subchannel(cdev->dev.parent);
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_nopath_notify, cdev);
ccw_device_nopath_notify);
queue_work(ccw_device_notify_work,
&cdev->private->kick_work);
} else
@ -969,7 +974,7 @@ ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
ERR_PTR(-EIO));
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_nopath_notify, cdev);
ccw_device_nopath_notify);
queue_work(ccw_device_notify_work, &cdev->private->kick_work);
} else if (cdev->private->flags.doverify)
/* Start delayed path verification. */
@ -992,7 +997,7 @@ ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event)
sch = to_subchannel(cdev->dev.parent);
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_nopath_notify, cdev);
ccw_device_nopath_notify);
queue_work(ccw_device_notify_work,
&cdev->private->kick_work);
} else
@ -1021,7 +1026,7 @@ void device_kill_io(struct subchannel *sch)
if (ret == -ENODEV) {
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_nopath_notify, cdev);
ccw_device_nopath_notify);
queue_work(ccw_device_notify_work,
&cdev->private->kick_work);
} else
@ -1033,7 +1038,7 @@ void device_kill_io(struct subchannel *sch)
ERR_PTR(-EIO));
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_nopath_notify, cdev);
ccw_device_nopath_notify);
queue_work(ccw_device_notify_work, &cdev->private->kick_work);
} else
/* Start delayed path verification. */
@ -1104,7 +1109,8 @@ device_trigger_reprobe(struct subchannel *sch)
/* Update some values. */
if (stsch(sch->schid, &sch->schib))
return;
if (!sch->schib.pmcw.dnv)
return;
/*
* The pim, pam, pom values may not be accurate, but they are the best
* we have before performing device selection :/
@ -1118,7 +1124,13 @@ device_trigger_reprobe(struct subchannel *sch)
sch->schib.pmcw.mp = 1;
sch->schib.pmcw.intparm = (__u32)(unsigned long)sch;
/* We should also udate ssd info, but this has to wait. */
ccw_device_start_id(cdev, 0);
/* Check if this is another device which appeared on the same sch. */
if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_move_to_orphanage);
queue_work(ccw_device_work, &cdev->private->kick_work);
} else
ccw_device_start_id(cdev, 0);
}
static void

28
drivers/s390/cio/device_ops.c
View File

@ -316,9 +316,9 @@ __ccw_device_retry_loop(struct ccw_device *cdev, struct ccw1 *ccw, long magic, _
ccw_device_set_timeout(cdev, 0);
if (ret == -EBUSY) {
/* Try again later. */
spin_unlock_irq(&sch->lock);
spin_unlock_irq(sch->lock);
msleep(10);
spin_lock_irq(&sch->lock);
spin_lock_irq(sch->lock);
continue;
}
if (ret != 0)
@ -326,12 +326,12 @@ __ccw_device_retry_loop(struct ccw_device *cdev, struct ccw1 *ccw, long magic, _
break;
/* Wait for end of request. */
cdev->private->intparm = magic;
spin_unlock_irq(&sch->lock);
spin_unlock_irq(sch->lock);
wait_event(cdev->private->wait_q,
(cdev->private->intparm == -EIO) ||
(cdev->private->intparm == -EAGAIN) ||
(cdev->private->intparm == 0));
spin_lock_irq(&sch->lock);
spin_lock_irq(sch->lock);
/* Check at least for channel end / device end */
if (cdev->private->intparm == -EIO) {
/* Non-retryable error. */
@ -342,9 +342,9 @@ __ccw_device_retry_loop(struct ccw_device *cdev, struct ccw1 *ccw, long magic, _
/* Success. */
break;
/* Try again later. */
spin_unlock_irq(&sch->lock);
spin_unlock_irq(sch->lock);
msleep(10);
spin_lock_irq(&sch->lock);
spin_lock_irq(sch->lock);
} while (1);
return ret;
@ -389,7 +389,7 @@ read_dev_chars (struct ccw_device *cdev, void **buffer, int length)
return ret;
}
spin_lock_irq(&sch->lock);
spin_lock_irq(sch->lock);
/* Save interrupt handler. */
handler = cdev->handler;
/* Temporarily install own handler. */
@ -406,7 +406,7 @@ read_dev_chars (struct ccw_device *cdev, void **buffer, int length)
/* Restore interrupt handler. */
cdev->handler = handler;
spin_unlock_irq(&sch->lock);
spin_unlock_irq(sch->lock);
clear_normalized_cda (rdc_ccw);
kfree(rdc_ccw);
@ -463,7 +463,7 @@ read_conf_data_lpm (struct ccw_device *cdev, void **buffer, int *length, __u8 lp
rcd_ccw->count = ciw->count;
rcd_ccw->flags = CCW_FLAG_SLI;
spin_lock_irq(&sch->lock);
spin_lock_irq(sch->lock);
/* Save interrupt handler. */
handler = cdev->handler;
/* Temporarily install own handler. */
@ -480,7 +480,7 @@ read_conf_data_lpm (struct ccw_device *cdev, void **buffer, int *length, __u8 lp
/* Restore interrupt handler. */
cdev->handler = handler;
spin_unlock_irq(&sch->lock);
spin_unlock_irq(sch->lock);
/*
* on success we update the user input parms
@ -537,7 +537,7 @@ ccw_device_stlck(struct ccw_device *cdev)
kfree(buf);
return -ENOMEM;
}
spin_lock_irqsave(&sch->lock, flags);
spin_lock_irqsave(sch->lock, flags);
ret = cio_enable_subchannel(sch, 3);
if (ret)
goto out_unlock;
@ -559,9 +559,9 @@ ccw_device_stlck(struct ccw_device *cdev)
goto out_unlock;
}
cdev->private->irb.scsw.actl |= SCSW_ACTL_START_PEND;
spin_unlock_irqrestore(&sch->lock, flags);
spin_unlock_irqrestore(sch->lock, flags);
wait_event(cdev->private->wait_q, cdev->private->irb.scsw.actl == 0);
spin_lock_irqsave(&sch->lock, flags);
spin_lock_irqsave(sch->lock, flags);
cio_disable_subchannel(sch); //FIXME: return code?
if ((cdev->private->irb.scsw.dstat !=
(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) ||
@ -572,7 +572,7 @@ ccw_device_stlck(struct ccw_device *cdev)
out_unlock:
kfree(buf);
kfree(buf2);
spin_unlock_irqrestore(&sch->lock, flags);
spin_unlock_irqrestore(sch->lock, flags);
return ret;
}

234
drivers/s390/cio/qdio.c
View File

@ -46,6 +46,7 @@
#include <asm/timex.h>
#include <asm/debug.h>
#include <asm/s390_rdev.h>
#include <asm/qdio.h>
#include "cio.h"
@ -65,12 +66,12 @@ MODULE_LICENSE("GPL");
/******************** HERE WE GO ***********************************/
static const char version[] = "QDIO base support version 2";
extern struct bus_type ccw_bus_type;
#ifdef QDIO_PERFORMANCE_STATS
static int qdio_performance_stats = 0;
static int proc_perf_file_registration;
static unsigned long i_p_c, i_p_nc, o_p_c, o_p_nc, ii_p_c, ii_p_nc;
static struct qdio_perf_stats perf_stats;
#endif /* QDIO_PERFORMANCE_STATS */
static int hydra_thinints;
static int is_passthrough = 0;
@ -275,9 +276,8 @@ qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
QDIO_DBF_TEXT4(0,trace,"sigasync");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.siga_syncs++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats)
perf_stats.siga_syncs++;
cc = do_siga_sync(q->schid, gpr2, gpr3);
if (cc)
@ -322,9 +322,8 @@ qdio_siga_output(struct qdio_q *q)
__u32 busy_bit;
__u64 start_time=0;
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.siga_outs++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats)
perf_stats.siga_outs++;
QDIO_DBF_TEXT4(0,trace,"sigaout");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
@ -358,9 +357,8 @@ qdio_siga_input(struct qdio_q *q)
QDIO_DBF_TEXT4(0,trace,"sigain");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.siga_ins++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats)
perf_stats.siga_ins++;
cc = do_siga_input(q->schid, q->mask);
@ -954,9 +952,8 @@ __qdio_outbound_processing(struct qdio_q *q)
if (unlikely(qdio_reserve_q(q))) {
qdio_release_q(q);
#ifdef QDIO_PERFORMANCE_STATS
o_p_c++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats)
o_p_c++;
/* as we're sissies, we'll check next time */
if (likely(!atomic_read(&q->is_in_shutdown))) {
qdio_mark_q(q);
@ -964,10 +961,10 @@ __qdio_outbound_processing(struct qdio_q *q)
}
return;
}
#ifdef QDIO_PERFORMANCE_STATS
o_p_nc++;
perf_stats.tl_runs++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats) {
o_p_nc++;
perf_stats.tl_runs++;
}
/* see comment in qdio_kick_outbound_q */
siga_attempts=atomic_read(&q->busy_siga_counter);
@ -1142,15 +1139,16 @@ qdio_has_inbound_q_moved(struct qdio_q *q)
{
int i;
#ifdef QDIO_PERFORMANCE_STATS
static int old_pcis=0;
static int old_thinints=0;
if ((old_pcis==perf_stats.pcis)&&(old_thinints==perf_stats.thinints))
perf_stats.start_time_inbound=NOW;
else
old_pcis=perf_stats.pcis;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats) {
if ((old_pcis==perf_stats.pcis)&&
(old_thinints==perf_stats.thinints))
perf_stats.start_time_inbound=NOW;
else
old_pcis=perf_stats.pcis;
}
i=qdio_get_inbound_buffer_frontier(q);
if ( (i!=GET_SAVED_FRONTIER(q)) ||
@ -1340,10 +1338,10 @@ qdio_kick_inbound_handler(struct qdio_q *q)
q->siga_error=0;
q->error_status_flags=0;
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound;
perf_stats.inbound_cnt++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats) {
perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound;
perf_stats.inbound_cnt++;
}
}
static inline void
@ -1363,9 +1361,8 @@ __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
*/
if (unlikely(qdio_reserve_q(q))) {
qdio_release_q(q);
#ifdef QDIO_PERFORMANCE_STATS
ii_p_c++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats)
ii_p_c++;
/*
* as we might just be about to stop polling, we make
* sure that we check again at least once more
@ -1373,9 +1370,8 @@ __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
tiqdio_sched_tl();
return;
}
#ifdef QDIO_PERFORMANCE_STATS
ii_p_nc++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats)
ii_p_nc++;
if (unlikely(atomic_read(&q->is_in_shutdown))) {
qdio_unmark_q(q);
goto out;
@ -1416,11 +1412,11 @@ __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
irq_ptr = (struct qdio_irq*)q->irq_ptr;
for (i=0;i<irq_ptr->no_output_qs;i++) {
oq = irq_ptr->output_qs[i];
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.tl_runs--;
#endif /* QDIO_PERFORMANCE_STATS */
if (!qdio_is_outbound_q_done(oq))
if (!qdio_is_outbound_q_done(oq)) {
if (qdio_performance_stats)
perf_stats.tl_runs--;
__qdio_outbound_processing(oq);
}
}
}
@ -1457,9 +1453,8 @@ __qdio_inbound_processing(struct qdio_q *q)
if (unlikely(qdio_reserve_q(q))) {
qdio_release_q(q);
#ifdef QDIO_PERFORMANCE_STATS
i_p_c++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats)
i_p_c++;
/* as we're sissies, we'll check next time */
if (likely(!atomic_read(&q->is_in_shutdown))) {
qdio_mark_q(q);
@ -1467,10 +1462,10 @@ __qdio_inbound_processing(struct qdio_q *q)
}
return;
}
#ifdef QDIO_PERFORMANCE_STATS
i_p_nc++;
perf_stats.tl_runs++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats) {
i_p_nc++;
perf_stats.tl_runs++;
}
again:
if (qdio_has_inbound_q_moved(q)) {
@ -1516,9 +1511,8 @@ tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
if (unlikely(qdio_reserve_q(q))) {
qdio_release_q(q);
#ifdef QDIO_PERFORMANCE_STATS
ii_p_c++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats)
ii_p_c++;
/*
* as we might just be about to stop polling, we make
* sure that we check again at least once more
@ -1609,9 +1603,8 @@ tiqdio_tl(unsigned long data)
{
QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.tl_runs++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats)
perf_stats.tl_runs++;
tiqdio_inbound_checks();
}
@ -1918,10 +1911,10 @@ tiqdio_thinint_handler(void)
{
QDIO_DBF_TEXT4(0,trace,"thin_int");
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.thinints++;
perf_stats.start_time_inbound=NOW;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats) {
perf_stats.thinints++;
perf_stats.start_time_inbound=NOW;
}
/* SVS only when needed:
* issue SVS to benefit from iqdio interrupt avoidance
@ -1976,18 +1969,17 @@ qdio_handle_pci(struct qdio_irq *irq_ptr)
int i;
struct qdio_q *q;
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.pcis++;
perf_stats.start_time_inbound=NOW;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats) {
perf_stats.pcis++;
perf_stats.start_time_inbound=NOW;
}
for (i=0;i<irq_ptr->no_input_qs;i++) {
q=irq_ptr->input_qs[i];
if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
qdio_mark_q(q);
else {
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.tl_runs--;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats)
perf_stats.tl_runs--;
__qdio_inbound_processing(q);
}
}
@ -1995,11 +1987,10 @@ qdio_handle_pci(struct qdio_irq *irq_ptr)
return;
for (i=0;i<irq_ptr->no_output_qs;i++) {
q=irq_ptr->output_qs[i];
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.tl_runs--;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_is_outbound_q_done(q))
continue;
if (qdio_performance_stats)
perf_stats.tl_runs--;
if (!irq_ptr->sync_done_on_outb_pcis)
SYNC_MEMORY;
__qdio_outbound_processing(q);
@ -2045,11 +2036,13 @@ omit_handler_call:
}
static void
qdio_call_shutdown(void *data)
qdio_call_shutdown(struct work_struct *work)
{
struct ccw_device_private *priv;
struct ccw_device *cdev;
cdev = (struct ccw_device *)data;
priv = container_of(work, struct ccw_device_private, kick_work);
cdev = priv->cdev;
qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
put_device(&cdev->dev);
}
@ -2091,7 +2084,7 @@ qdio_timeout_handler(struct ccw_device *cdev)
if (get_device(&cdev->dev)) {
/* Can't call shutdown from interrupt context. */
PREPARE_WORK(&cdev->private->kick_work,
qdio_call_shutdown, (void *)cdev);
qdio_call_shutdown);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
break;
@ -3458,19 +3451,18 @@ do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
/* This is the outbound handling of queues */
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.start_time_outbound=NOW;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats)
perf_stats.start_time_outbound=NOW;
qdio_do_qdio_fill_output(q,qidx,count,buffers);
used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
if (callflags&QDIO_FLAG_DONT_SIGA) {
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
perf_stats.outbound_cnt++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats) {
perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
perf_stats.outbound_cnt++;
}
return;
}
if (q->is_iqdio_q) {
@ -3500,9 +3492,8 @@ do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
qdio_kick_outbound_q(q);
} else {
QDIO_DBF_TEXT3(0,trace, "fast-req");
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.fast_reqs++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats)
perf_stats.fast_reqs++;
}
}
/*
@ -3513,10 +3504,10 @@ do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
__qdio_outbound_processing(q);
}
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
perf_stats.outbound_cnt++;
#endif /* QDIO_PERFORMANCE_STATS */
if (qdio_performance_stats) {
perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
perf_stats.outbound_cnt++;
}
}
/* count must be 1 in iqdio */
@ -3574,7 +3565,6 @@ do_QDIO(struct ccw_device *cdev,unsigned int callflags,
return 0;
}
#ifdef QDIO_PERFORMANCE_STATS
static int
qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
int buffer_length, int *eof, void *data)
@ -3590,29 +3580,29 @@ qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
_OUTP_IT("i_p_nc/c=%lu/%lu\n",i_p_nc,i_p_c);
_OUTP_IT("ii_p_nc/c=%lu/%lu\n",ii_p_nc,ii_p_c);
_OUTP_IT("o_p_nc/c=%lu/%lu\n",o_p_nc,o_p_c);
_OUTP_IT("Number of tasklet runs (total) : %u\n",
_OUTP_IT("Number of tasklet runs (total) : %lu\n",
perf_stats.tl_runs);
_OUTP_IT("\n");
_OUTP_IT("Number of SIGA sync's issued : %u\n",
_OUTP_IT("Number of SIGA sync's issued : %lu\n",
perf_stats.siga_syncs);
_OUTP_IT("Number of SIGA in's issued : %u\n",
_OUTP_IT("Number of SIGA in's issued : %lu\n",
perf_stats.siga_ins);
_OUTP_IT("Number of SIGA out's issued : %u\n",
_OUTP_IT("Number of SIGA out's issued : %lu\n",
perf_stats.siga_outs);
_OUTP_IT("Number of PCIs caught : %u\n",
_OUTP_IT("Number of PCIs caught : %lu\n",
perf_stats.pcis);
_OUTP_IT("Number of adapter interrupts caught : %u\n",
_OUTP_IT("Number of adapter interrupts caught : %lu\n",
perf_stats.thinints);
_OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA) : %u\n",
_OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA) : %lu\n",
perf_stats.fast_reqs);
_OUTP_IT("\n");
_OUTP_IT("Total time of all inbound actions (us) incl. UL : %u\n",
_OUTP_IT("Total time of all inbound actions (us) incl. UL : %lu\n",
perf_stats.inbound_time);
_OUTP_IT("Number of inbound transfers : %u\n",
_OUTP_IT("Number of inbound transfers : %lu\n",
perf_stats.inbound_cnt);
_OUTP_IT("Total time of all outbound do_QDIOs (us) : %u\n",
_OUTP_IT("Total time of all outbound do_QDIOs (us) : %lu\n",
perf_stats.outbound_time);
_OUTP_IT("Number of do_QDIOs outbound : %u\n",
_OUTP_IT("Number of do_QDIOs outbound : %lu\n",
perf_stats.outbound_cnt);
_OUTP_IT("\n");
@ -3620,12 +3610,10 @@ qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
}
static struct proc_dir_entry *qdio_perf_proc_file;
#endif /* QDIO_PERFORMANCE_STATS */
static void
qdio_add_procfs_entry(void)
{
#ifdef QDIO_PERFORMANCE_STATS
proc_perf_file_registration=0;
qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
S_IFREG|0444,&proc_root);
@ -3637,20 +3625,58 @@ qdio_add_procfs_entry(void)
QDIO_PRINT_WARN("was not able to register perf. " \
"proc-file (%i).\n",
proc_perf_file_registration);
#endif /* QDIO_PERFORMANCE_STATS */
}
static void
qdio_remove_procfs_entry(void)
{
#ifdef QDIO_PERFORMANCE_STATS
perf_stats.tl_runs=0;
if (!proc_perf_file_registration) /* means if it went ok earlier */
remove_proc_entry(QDIO_PERF,&proc_root);
#endif /* QDIO_PERFORMANCE_STATS */
}
/**
* attributes in sysfs
*****************************************************************************/
static ssize_t
qdio_performance_stats_show(struct bus_type *bus, char *buf)
{
return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
}
static ssize_t
qdio_performance_stats_store(struct bus_type *bus, const char *buf, size_t count)
{
char *tmp;
int i;
i = simple_strtoul(buf, &tmp, 16);
if ((i == 0) || (i == 1)) {
if (i == qdio_performance_stats)
return count;
qdio_performance_stats = i;
if (i==0) {
/* reset perf. stat. info */
i_p_nc = 0;
i_p_c = 0;
ii_p_nc = 0;
ii_p_c = 0;
o_p_nc = 0;
o_p_c = 0;
memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
}
} else {
QDIO_PRINT_WARN("QDIO performance_stats: write 0 or 1 to this file!\n");
return -EINVAL;
}
return count;
}
static BUS_ATTR(qdio_performance_stats, 0644, qdio_performance_stats_show,
qdio_performance_stats_store);
static void
tiqdio_register_thinints(void)
{
@ -3695,6 +3721,7 @@ qdio_release_qdio_memory(void)
kfree(indicators);
}
static void
qdio_unregister_dbf_views(void)
{
@ -3796,9 +3823,7 @@ static int __init
init_QDIO(void)
{
int res;
#ifdef QDIO_PERFORMANCE_STATS
void *ptr;
#endif /* QDIO_PERFORMANCE_STATS */
printk("qdio: loading %s\n",version);
@ -3811,13 +3836,12 @@ init_QDIO(void)
return res;
QDIO_DBF_TEXT0(0,setup,"initQDIO");
res = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
#ifdef QDIO_PERFORMANCE_STATS
memset((void*)&perf_stats,0,sizeof(perf_stats));
memset((void*)&perf_stats,0,sizeof(perf_stats));
QDIO_DBF_TEXT0(0,setup,"perfstat");
ptr=&perf_stats;
QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
#endif /* QDIO_PERFORMANCE_STATS */
qdio_add_procfs_entry();
@ -3841,7 +3865,7 @@ cleanup_QDIO(void)
qdio_release_qdio_memory();
qdio_unregister_dbf_views();
mempool_destroy(qdio_mempool_scssc);
bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
printk("qdio: %s: module removed\n",version);
}

28
drivers/s390/cio/qdio.h
View File

@ -12,10 +12,6 @@
#endif /* CONFIG_QDIO_DEBUG */
#define QDIO_USE_PROCESSING_STATE
#ifdef CONFIG_QDIO_PERF_STATS
#define QDIO_PERFORMANCE_STATS
#endif /* CONFIG_QDIO_PERF_STATS */
#define QDIO_MINIMAL_BH_RELIEF_TIME 16
#define QDIO_TIMER_POLL_VALUE 1
#define IQDIO_TIMER_POLL_VALUE 1
@ -409,25 +405,23 @@ do_clear_global_summary(void)
#define CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS 0x08
#define CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS 0x04
#ifdef QDIO_PERFORMANCE_STATS
struct qdio_perf_stats {
unsigned int tl_runs;
unsigned long tl_runs;
unsigned int siga_outs;
unsigned int siga_ins;
unsigned int siga_syncs;
unsigned int pcis;
unsigned int thinints;
unsigned int fast_reqs;
unsigned long siga_outs;
unsigned long siga_ins;
unsigned long siga_syncs;
unsigned long pcis;
unsigned long thinints;
unsigned long fast_reqs;
__u64 start_time_outbound;
unsigned int outbound_cnt;
unsigned int outbound_time;
unsigned long outbound_cnt;
unsigned long outbound_time;
__u64 start_time_inbound;
unsigned int inbound_cnt;
unsigned int inbound_time;
unsigned long inbound_cnt;
unsigned long inbound_time;
};
#endif /* QDIO_PERFORMANCE_STATS */
/* unlikely as the later the better */
#define SYNC_MEMORY if (unlikely(q->siga_sync)) qdio_siga_sync_q(q)

17
drivers/s390/crypto/ap_bus.c
View File

@ -33,6 +33,7 @@
#include <linux/kthread.h>
#include <linux/mutex.h>
#include <asm/s390_rdev.h>
#include <asm/reset.h>
#include "ap_bus.h"
@ -1128,6 +1129,19 @@ static void ap_poll_thread_stop(void)
mutex_unlock(&ap_poll_thread_mutex);
}
static void ap_reset(void)
{
int i, j;
for (i = 0; i < AP_DOMAINS; i++)
for (j = 0; j < AP_DEVICES; j++)
ap_reset_queue(AP_MKQID(j, i));
}
static struct reset_call ap_reset_call = {
.fn = ap_reset,
};
/**
* The module initialization code.
*/
@ -1144,6 +1158,7 @@ int __init ap_module_init(void)
printk(KERN_WARNING "AP instructions not installed.\n");
return -ENODEV;
}
register_reset_call(&ap_reset_call);
/* Create /sys/bus/ap. */
rc = bus_register(&ap_bus_type);
@ -1197,6 +1212,7 @@ out_bus:
bus_remove_file(&ap_bus_type, ap_bus_attrs[i]);
bus_unregister(&ap_bus_type);
out:
unregister_reset_call(&ap_reset_call);
return rc;
}
@ -1227,6 +1243,7 @@ void ap_module_exit(void)
for (i = 0; ap_bus_attrs[i]; i++)
bus_remove_file(&ap_bus_type, ap_bus_attrs[i]);
bus_unregister(&ap_bus_type);
unregister_reset_call(&ap_reset_call);
}
#ifndef CONFIG_ZCRYPT_MONOLITHIC

2
include/asm-s390/dasd.h
View File

@ -69,11 +69,13 @@ typedef struct dasd_information2_t {
* 0x01: readonly (ro)
* 0x02: use diag discipline (diag)
* 0x04: set the device initially online (internal use only)
* 0x08: enable ERP related logging
*/
#define DASD_FEATURE_DEFAULT 0x00
#define DASD_FEATURE_READONLY 0x01
#define DASD_FEATURE_USEDIAG 0x02
#define DASD_FEATURE_INITIAL_ONLINE 0x04
#define DASD_FEATURE_ERPLOG 0x08
#define DASD_PARTN_BITS 2

22
include/asm-s390/page.h
View File

@ -127,6 +127,26 @@ page_get_storage_key(unsigned long addr)
return skey;
}
extern unsigned long max_pfn;
static inline int pfn_valid(unsigned long pfn)
{
unsigned long dummy;
int ccode;
if (pfn >= max_pfn)
return 0;
asm volatile(
" lra %0,0(%2)\n"
" ipm %1\n"
" srl %1,28\n"
: "=d" (dummy), "=d" (ccode)
: "a" (pfn << PAGE_SHIFT)
: "cc");
return !ccode;
}
#endif /* !__ASSEMBLY__ */
/* to align the pointer to the (next) page boundary */
@ -138,8 +158,6 @@ page_get_storage_key(unsigned long addr)
#define __va(x) (void *)(unsigned long)(x)
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#define pfn_valid(pfn) ((pfn) < max_mapnr)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \

3
include/asm-s390/pgalloc.h
View File

@ -25,8 +25,11 @@ extern void diag10(unsigned long addr);
* Page allocation orders.
*/
#ifndef __s390x__
# define PTE_ALLOC_ORDER 0
# define PMD_ALLOC_ORDER 0
# define PGD_ALLOC_ORDER 1
#else /* __s390x__ */
# define PTE_ALLOC_ORDER 0
# define PMD_ALLOC_ORDER 2
# define PGD_ALLOC_ORDER 2
#endif /* __s390x__ */

16
include/asm-s390/pgtable.h
View File

@ -107,23 +107,25 @@ extern char empty_zero_page[PAGE_SIZE];
* The vmalloc() routines leaves a hole of 4kB between each vmalloced
* area for the same reason. ;)
*/
extern unsigned long vmalloc_end;
#define VMALLOC_OFFSET (8*1024*1024)
#define VMALLOC_START (((unsigned long) high_memory + VMALLOC_OFFSET) \
& ~(VMALLOC_OFFSET-1))
#define VMALLOC_END vmalloc_end
/*
* We need some free virtual space to be able to do vmalloc.
* VMALLOC_MIN_SIZE defines the minimum size of the vmalloc
* area. On a machine with 2GB memory we make sure that we
* have at least 128MB free space for vmalloc. On a machine
* with 4TB we make sure we have at least 1GB.
* with 4TB we make sure we have at least 128GB.
*/
#ifndef __s390x__
#define VMALLOC_MIN_SIZE 0x8000000UL
#define VMALLOC_END 0x80000000UL
#define VMALLOC_END_INIT 0x80000000UL
#else /* __s390x__ */
#define VMALLOC_MIN_SIZE 0x40000000UL
#define VMALLOC_END 0x40000000000UL
#define VMALLOC_MIN_SIZE 0x2000000000UL
#define VMALLOC_END_INIT 0x40000000000UL
#endif /* __s390x__ */
/*
@ -815,11 +817,17 @@ static inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
#define kern_addr_valid(addr) (1)
extern int add_shared_memory(unsigned long start, unsigned long size);
extern int remove_shared_memory(unsigned long start, unsigned long size);
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do { } while (0)
#define __HAVE_ARCH_MEMMAP_INIT
extern void memmap_init(unsigned long, int, unsigned long, unsigned long);
#define __HAVE_ARCH_PTEP_ESTABLISH
#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG