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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc

Browse Source 
Pull sparc updates from David Miller:
 "Just a couple of fixes/cleanups:

   - Correct NUMA latency calculations on sparc64, from Nitin Gupta.

   - ASI_ST_BLKINIT_MRU_S value was wrong, from Rob Gardner.

   - Fix non-faulting load handling of non-quad values, also from Rob
     Gardner.

   - Cleanup VISsave assembler, from Sam Ravnborg.

   - Fix iommu-common code so it doesn't emit rediculous warnings on
     some architectures, particularly ARM"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Fix numa distance values
  sparc64: Don't restrict fp regs for no-fault loads
  iommu-common: Fix error code used in iommu_tbl_range_{alloc,free}().
  sparc64: use ENTRY/ENDPROC in VISsave
  sparc64: Fix incorrect ASI_ST_BLKINIT_MRU_S value
This commit is contained in:
Linus Torvalds 2015-11-05 16:34:48 -08:00
commit 2c302e7e41
10 changed files with 113 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/sparc/include/asm/topology_64.h
View File

@ -31,6 +31,9 @@ static inline int pcibus_to_node(struct pci_bus *pbus)
cpu_all_mask : \
cpumask_of_node(pcibus_to_node(bus)))
int __node_distance(int, int);
#define node_distance(a, b) __node_distance(a, b)
#else /* CONFIG_NUMA */
#include <asm-generic/topology.h>

2
arch/sparc/include/uapi/asm/asi.h
View File

@ -279,7 +279,7 @@
* Most-Recently-Used, primary,
* implicit
*/
#define ASI_ST_BLKINIT_MRU_S 0xf2 /* (NG4) init-store, twin load,
#define ASI_ST_BLKINIT_MRU_S 0xf3 /* (NG4) init-store, twin load,
* Most-Recently-Used, secondary,
* implicit
*/

12
arch/sparc/kernel/iommu.c
View File

@ -161,7 +161,7 @@ static inline iopte_t *alloc_npages(struct device *dev,
entry = iommu_tbl_range_alloc(dev, &iommu->tbl, npages, NULL,
(unsigned long)(-1), 0);
if (unlikely(entry == DMA_ERROR_CODE))
if (unlikely(entry == IOMMU_ERROR_CODE))
return NULL;
return iommu->page_table + entry;
@ -253,7 +253,7 @@ static void dma_4u_free_coherent(struct device *dev, size_t size,
npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT;
iommu = dev->archdata.iommu;
iommu_tbl_range_free(&iommu->tbl, dvma, npages, DMA_ERROR_CODE);
iommu_tbl_range_free(&iommu->tbl, dvma, npages, IOMMU_ERROR_CODE);
order = get_order(size);
if (order < 10)
@ -426,7 +426,7 @@ static void dma_4u_unmap_page(struct device *dev, dma_addr_t bus_addr,
iommu_free_ctx(iommu, ctx);
spin_unlock_irqrestore(&iommu->lock, flags);
iommu_tbl_range_free(&iommu->tbl, bus_addr, npages, DMA_ERROR_CODE);
iommu_tbl_range_free(&iommu->tbl, bus_addr, npages, IOMMU_ERROR_CODE);
}
static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
@ -492,7 +492,7 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
&handle, (unsigned long)(-1), 0);
/* Handle failure */
if (unlikely(entry == DMA_ERROR_CODE)) {
if (unlikely(entry == IOMMU_ERROR_CODE)) {
if (printk_ratelimit())
printk(KERN_INFO "iommu_alloc failed, iommu %p paddr %lx"
" npages %lx\n", iommu, paddr, npages);
@ -571,7 +571,7 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
iopte_make_dummy(iommu, base + j);
iommu_tbl_range_free(&iommu->tbl, vaddr, npages,
DMA_ERROR_CODE);
IOMMU_ERROR_CODE);
s->dma_address = DMA_ERROR_CODE;
s->dma_length = 0;
@ -648,7 +648,7 @@ static void dma_4u_unmap_sg(struct device *dev, struct scatterlist *sglist,
iopte_make_dummy(iommu, base + i);
iommu_tbl_range_free(&iommu->tbl, dma_handle, npages,
DMA_ERROR_CODE);
IOMMU_ERROR_CODE);
sg = sg_next(sg);
}

2
arch/sparc/kernel/ldc.c
View File

@ -1953,7 +1953,7 @@ static struct ldc_mtable_entry *alloc_npages(struct ldc_iommu *iommu,
entry = iommu_tbl_range_alloc(NULL, &iommu->iommu_map_table,
npages, NULL, (unsigned long)-1, 0);
if (unlikely(entry < 0))
if (unlikely(entry == IOMMU_ERROR_CODE))
return NULL;
return iommu->page_table + entry;

18
arch/sparc/kernel/pci_sun4v.c
View File

@ -159,7 +159,7 @@ static void *dma_4v_alloc_coherent(struct device *dev, size_t size,
entry = iommu_tbl_range_alloc(dev, &iommu->tbl, npages, NULL,
(unsigned long)(-1), 0);
if (unlikely(entry == DMA_ERROR_CODE))
if (unlikely(entry == IOMMU_ERROR_CODE))
goto range_alloc_fail;
*dma_addrp = (iommu->tbl.table_map_base + (entry << IO_PAGE_SHIFT));
@ -187,7 +187,7 @@ static void *dma_4v_alloc_coherent(struct device *dev, size_t size,
return ret;
iommu_map_fail:
iommu_tbl_range_free(&iommu->tbl, *dma_addrp, npages, DMA_ERROR_CODE);
iommu_tbl_range_free(&iommu->tbl, *dma_addrp, npages, IOMMU_ERROR_CODE);
range_alloc_fail:
free_pages(first_page, order);
@ -226,7 +226,7 @@ static void dma_4v_free_coherent(struct device *dev, size_t size, void *cpu,
devhandle = pbm->devhandle;
entry = ((dvma - iommu->tbl.table_map_base) >> IO_PAGE_SHIFT);
dma_4v_iommu_demap(&devhandle, entry, npages);
iommu_tbl_range_free(&iommu->tbl, dvma, npages, DMA_ERROR_CODE);
iommu_tbl_range_free(&iommu->tbl, dvma, npages, IOMMU_ERROR_CODE);
order = get_order(size);
if (order < 10)
free_pages((unsigned long)cpu, order);
@ -256,7 +256,7 @@ static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page,
entry = iommu_tbl_range_alloc(dev, &iommu->tbl, npages, NULL,
(unsigned long)(-1), 0);
if (unlikely(entry == DMA_ERROR_CODE))
if (unlikely(entry == IOMMU_ERROR_CODE))
goto bad;
bus_addr = (iommu->tbl.table_map_base + (entry << IO_PAGE_SHIFT));
@ -288,7 +288,7 @@ static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page,
return DMA_ERROR_CODE;
iommu_map_fail:
iommu_tbl_range_free(&iommu->tbl, bus_addr, npages, DMA_ERROR_CODE);
iommu_tbl_range_free(&iommu->tbl, bus_addr, npages, IOMMU_ERROR_CODE);
return DMA_ERROR_CODE;
}
@ -317,7 +317,7 @@ static void dma_4v_unmap_page(struct device *dev, dma_addr_t bus_addr,
bus_addr &= IO_PAGE_MASK;
entry = (bus_addr - iommu->tbl.table_map_base) >> IO_PAGE_SHIFT;
dma_4v_iommu_demap(&devhandle, entry, npages);
iommu_tbl_range_free(&iommu->tbl, bus_addr, npages, DMA_ERROR_CODE);
iommu_tbl_range_free(&iommu->tbl, bus_addr, npages, IOMMU_ERROR_CODE);
}
static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
@ -376,7 +376,7 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
&handle, (unsigned long)(-1), 0);
/* Handle failure */
if (unlikely(entry == DMA_ERROR_CODE)) {
if (unlikely(entry == IOMMU_ERROR_CODE)) {
if (printk_ratelimit())
printk(KERN_INFO "iommu_alloc failed, iommu %p paddr %lx"
" npages %lx\n", iommu, paddr, npages);
@ -451,7 +451,7 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
npages = iommu_num_pages(s->dma_address, s->dma_length,
IO_PAGE_SIZE);
iommu_tbl_range_free(&iommu->tbl, vaddr, npages,
DMA_ERROR_CODE);
IOMMU_ERROR_CODE);
/* XXX demap? XXX */
s->dma_address = DMA_ERROR_CODE;
s->dma_length = 0;
@ -496,7 +496,7 @@ static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist,
entry = ((dma_handle - tbl->table_map_base) >> shift);
dma_4v_iommu_demap(&devhandle, entry, npages);
iommu_tbl_range_free(&iommu->tbl, dma_handle, npages,
DMA_ERROR_CODE);
IOMMU_ERROR_CODE);
sg = sg_next(sg);
}

22
arch/sparc/kernel/unaligned_64.c
View File

@ -436,24 +436,26 @@ extern void sun4v_data_access_exception(struct pt_regs *regs,
int handle_ldf_stq(u32 insn, struct pt_regs *regs)
{
unsigned long addr = compute_effective_address(regs, insn, 0);
int freg = ((insn >> 25) & 0x1e) | ((insn >> 20) & 0x20);
int freg;
struct fpustate *f = FPUSTATE;
int asi = decode_asi(insn, regs);
int flag = (freg < 32) ? FPRS_DL : FPRS_DU;
int flag;
perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, 0);
save_and_clear_fpu();
current_thread_info()->xfsr[0] &= ~0x1c000;
if (freg & 3) {
current_thread_info()->xfsr[0] |= (6 << 14) /* invalid_fp_register */;
do_fpother(regs);
return 0;
}
if (insn & 0x200000) {
/* STQ */
u64 first = 0, second = 0;
freg = ((insn >> 25) & 0x1e) | ((insn >> 20) & 0x20);
flag = (freg < 32) ? FPRS_DL : FPRS_DU;
if (freg & 3) {
current_thread_info()->xfsr[0] |= (6 << 14) /* invalid_fp_register */;
do_fpother(regs);
return 0;
}
if (current_thread_info()->fpsaved[0] & flag) {
first = *(u64 *)&f->regs[freg];
second = *(u64 *)&f->regs[freg+2];
@ -513,6 +515,12 @@ int handle_ldf_stq(u32 insn, struct pt_regs *regs)
case 0x100000: size = 4; break;
default: size = 2; break;
}
if (size == 1)
freg = (insn >> 25) & 0x1f;
else
freg = ((insn >> 25) & 0x1e) | ((insn >> 20) & 0x20);
flag = (freg < 32) ? FPRS_DL : FPRS_DU;
for (i = 0; i < size; i++)
data[i] = 0;

10
arch/sparc/lib/VISsave.S
View File

@ -6,24 +6,23 @@
* Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
*/
#include <linux/linkage.h>
#include <asm/asi.h>
#include <asm/page.h>
#include <asm/ptrace.h>
#include <asm/visasm.h>
#include <asm/thread_info.h>
.text
.globl VISenter, VISenterhalf
/* On entry: %o5=current FPRS value, %g7 is callers address */
/* May clobber %o5, %g1, %g2, %g3, %g7, %icc, %xcc */
/* Nothing special need be done here to handle pre-emption, this
* FPU save/restore mechanism is already preemption safe.
*/
.text
.align 32
VISenter:
ENTRY(VISenter)
ldub [%g6 + TI_FPDEPTH], %g1
brnz,a,pn %g1, 1f
cmp %g1, 1
@ -79,3 +78,4 @@ vis1: ldub [%g6 + TI_FPSAVED], %g3
.align 32
80: jmpl %g7 + %g0, %g0
nop
ENDPROC(VISenter)

70
arch/sparc/mm/init_64.c
View File

@ -93,6 +93,8 @@ static unsigned long cpu_pgsz_mask;
static struct linux_prom64_registers pavail[MAX_BANKS];
static int pavail_ents;
u64 numa_latency[MAX_NUMNODES][MAX_NUMNODES];
static int cmp_p64(const void *a, const void *b)
{
const struct linux_prom64_registers *x = a, *y = b;
@ -1157,6 +1159,48 @@ static struct mdesc_mlgroup * __init find_mlgroup(u64 node)
return NULL;
}
int __node_distance(int from, int to)
{
if ((from >= MAX_NUMNODES) || (to >= MAX_NUMNODES)) {
pr_warn("Returning default NUMA distance value for %d->%d\n",
from, to);
return (from == to) ? LOCAL_DISTANCE : REMOTE_DISTANCE;
}
return numa_latency[from][to];
}
static int find_best_numa_node_for_mlgroup(struct mdesc_mlgroup *grp)
{
int i;
for (i = 0; i < MAX_NUMNODES; i++) {
struct node_mem_mask *n = &node_masks[i];
if ((grp->mask == n->mask) && (grp->match == n->val))
break;
}
return i;
}
static void find_numa_latencies_for_group(struct mdesc_handle *md, u64 grp,
int index)
{
u64 arc;
mdesc_for_each_arc(arc, md, grp, MDESC_ARC_TYPE_FWD) {
int tnode;
u64 target = mdesc_arc_target(md, arc);
struct mdesc_mlgroup *m = find_mlgroup(target);
if (!m)
continue;
tnode = find_best_numa_node_for_mlgroup(m);
if (tnode == MAX_NUMNODES)
continue;
numa_latency[index][tnode] = m->latency;
}
}
static int __init numa_attach_mlgroup(struct mdesc_handle *md, u64 grp,
int index)
{
@ -1220,9 +1264,16 @@ static int __init numa_parse_mdesc_group(struct mdesc_handle *md, u64 grp,
static int __init numa_parse_mdesc(void)
{
struct mdesc_handle *md = mdesc_grab();
int i, err, count;
int i, j, err, count;
u64 node;
/* Some sane defaults for numa latency values */
for (i = 0; i < MAX_NUMNODES; i++) {
for (j = 0; j < MAX_NUMNODES; j++)
numa_latency[i][j] = (i == j) ?
LOCAL_DISTANCE : REMOTE_DISTANCE;
}
node = mdesc_node_by_name(md, MDESC_NODE_NULL, "latency-groups");
if (node == MDESC_NODE_NULL) {
mdesc_release(md);
@ -1245,6 +1296,23 @@ static int __init numa_parse_mdesc(void)
count++;
}
count = 0;
mdesc_for_each_node_by_name(md, node, "group") {
find_numa_latencies_for_group(md, node, count);
count++;
}
/* Normalize numa latency matrix according to ACPI SLIT spec. */
for (i = 0; i < MAX_NUMNODES; i++) {
u64 self_latency = numa_latency[i][i];
for (j = 0; j < MAX_NUMNODES; j++) {
numa_latency[i][j] =
(numa_latency[i][j] * LOCAL_DISTANCE) /
self_latency;
}
}
add_node_ranges();
for (i = 0; i < num_node_masks; i++) {

1
include/linux/iommu-common.h
View File

@ -7,6 +7,7 @@
#define IOMMU_POOL_HASHBITS 4
#define IOMMU_NR_POOLS (1 << IOMMU_POOL_HASHBITS)
#define IOMMU_ERROR_CODE (~(unsigned long) 0)
struct iommu_pool {
unsigned long start;

10
lib/iommu-common.c
View File

@ -11,10 +11,6 @@
#include <linux/dma-mapping.h>
#include <linux/hash.h>
#ifndef DMA_ERROR_CODE
#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
#endif
static unsigned long iommu_large_alloc = 15;
static DEFINE_PER_CPU(unsigned int, iommu_hash_common);
@ -123,7 +119,7 @@ unsigned long iommu_tbl_range_alloc(struct device *dev,
/* Sanity check */
if (unlikely(npages == 0)) {
WARN_ON_ONCE(1);
return DMA_ERROR_CODE;
return IOMMU_ERROR_CODE;
}
if (largealloc) {
@ -206,7 +202,7 @@ unsigned long iommu_tbl_range_alloc(struct device *dev,
goto again;
} else {
/* give up */
n = DMA_ERROR_CODE;
n = IOMMU_ERROR_CODE;
goto bail;
}
}
@ -259,7 +255,7 @@ void iommu_tbl_range_free(struct iommu_map_table *iommu, u64 dma_addr,
unsigned long flags;
unsigned long shift = iommu->table_shift;
if (entry == DMA_ERROR_CODE) /* use default addr->entry mapping */
if (entry == IOMMU_ERROR_CODE) /* use default addr->entry mapping */
entry = (dma_addr - iommu->table_map_base) >> shift;
pool = get_pool(iommu, entry);