bitmap: replace bitmap_{from,to}_u32array
with bitmap_{from,to}_arr32 over the kernel. Additionally to it:
* __check_eq_bitmap() now takes single nbits argument.
* __check_eq_u32_array is not used in new test but may be used in
future. So I don't remove it here, but annotate as __used.
Tested on arm64 and 32-bit BE mips.
[arnd@arndb.de: perf: arm_dsu_pmu: convert to bitmap_from_arr32]
Link: http://lkml.kernel.org/r/20180201172508.5739-2-ynorov@caviumnetworks.com
[ynorov@caviumnetworks.com: fix net/core/ethtool.c]
Link: http://lkml.kernel.org/r/20180205071747.4ekxtsbgxkj5b2fz@yury-thinkpad
Link: http://lkml.kernel.org/r/20171228150019.27953-2-ynorov@caviumnetworks.com
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Ben Hutchings <ben@decadent.org.uk>
Cc: David Decotigny <decot@googlers.com>,
Cc: David S. Miller <davem@davemloft.net>,
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yury Norov
Linus Torvalds
parent
c724f19361
commit
3aa56885e5
6 changed files with 53 additions and 307 deletions
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@ -925,9 +925,8 @@ static void __armv8pmu_probe_pmu(void *info)
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pmceid[0] = read_sysreg(pmceid0_el0);
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pmceid[1] = read_sysreg(pmceid1_el0);
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bitmap_from_u32array(cpu_pmu->pmceid_bitmap,
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ARMV8_PMUV3_MAX_COMMON_EVENTS, pmceid,
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ARRAY_SIZE(pmceid));
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bitmap_from_arr32(cpu_pmu->pmceid_bitmap,
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pmceid, ARMV8_PMUV3_MAX_COMMON_EVENTS);
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}
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static int armv8pmu_probe_pmu(struct arm_pmu *cpu_pmu)
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@ -658,10 +658,8 @@ static void dsu_pmu_probe_pmu(struct dsu_pmu *dsu_pmu)
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return;
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cpmceid[0] = __dsu_pmu_read_pmceid(0);
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cpmceid[1] = __dsu_pmu_read_pmceid(1);
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bitmap_from_u32array(dsu_pmu->cpmceid_bitmap,
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DSU_PMU_MAX_COMMON_EVENTS,
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cpmceid,
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ARRAY_SIZE(cpmceid));
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bitmap_from_arr32(dsu_pmu->cpmceid_bitmap, cpmceid,
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DSU_PMU_MAX_COMMON_EVENTS);
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}
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static void dsu_pmu_set_active_cpu(int cpu, struct dsu_pmu *dsu_pmu)
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@ -64,8 +64,6 @@
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* bitmap_find_free_region(bitmap, bits, order) Find and allocate bit region
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* bitmap_release_region(bitmap, pos, order) Free specified bit region
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* bitmap_allocate_region(bitmap, pos, order) Allocate specified bit region
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* bitmap_from_u32array(dst, nbits, buf, nwords) *dst = *buf (nwords 32b words)
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* bitmap_to_u32array(buf, nwords, src, nbits) *buf = *dst (nwords 32b words)
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* bitmap_from_arr32(dst, buf, nbits) Copy nbits from u32[] buf to dst
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* bitmap_to_arr32(buf, src, nbits) Copy nbits from buf to u32[] dst
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*
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@ -176,14 +174,7 @@ extern void bitmap_fold(unsigned long *dst, const unsigned long *orig,
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extern int bitmap_find_free_region(unsigned long *bitmap, unsigned int bits, int order);
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extern void bitmap_release_region(unsigned long *bitmap, unsigned int pos, int order);
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extern int bitmap_allocate_region(unsigned long *bitmap, unsigned int pos, int order);
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extern unsigned int bitmap_from_u32array(unsigned long *bitmap,
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unsigned int nbits,
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const u32 *buf,
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unsigned int nwords);
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extern unsigned int bitmap_to_u32array(u32 *buf,
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unsigned int nwords,
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const unsigned long *bitmap,
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unsigned int nbits);
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#ifdef __BIG_ENDIAN
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extern void bitmap_copy_le(unsigned long *dst, const unsigned long *src, unsigned int nbits);
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#else
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87
lib/bitmap.c
87
lib/bitmap.c
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@ -1105,93 +1105,6 @@ int bitmap_allocate_region(unsigned long *bitmap, unsigned int pos, int order)
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}
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EXPORT_SYMBOL(bitmap_allocate_region);
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/**
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* bitmap_from_u32array - copy the contents of a u32 array of bits to bitmap
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* @bitmap: array of unsigned longs, the destination bitmap, non NULL
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* @nbits: number of bits in @bitmap
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* @buf: array of u32 (in host byte order), the source bitmap, non NULL
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* @nwords: number of u32 words in @buf
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*
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* copy min(nbits, 32*nwords) bits from @buf to @bitmap, remaining
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* bits between nword and nbits in @bitmap (if any) are cleared. In
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* last word of @bitmap, the bits beyond nbits (if any) are kept
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* unchanged.
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*
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* Return the number of bits effectively copied.
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*/
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unsigned int
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bitmap_from_u32array(unsigned long *bitmap, unsigned int nbits,
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const u32 *buf, unsigned int nwords)
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{
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unsigned int dst_idx, src_idx;
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for (src_idx = dst_idx = 0; dst_idx < BITS_TO_LONGS(nbits); ++dst_idx) {
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unsigned long part = 0;
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if (src_idx < nwords)
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part = buf[src_idx++];
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#if BITS_PER_LONG == 64
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if (src_idx < nwords)
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part |= ((unsigned long) buf[src_idx++]) << 32;
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#endif
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if (dst_idx < nbits/BITS_PER_LONG)
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bitmap[dst_idx] = part;
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else {
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unsigned long mask = BITMAP_LAST_WORD_MASK(nbits);
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bitmap[dst_idx] = (bitmap[dst_idx] & ~mask)
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| (part & mask);
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}
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}
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return min_t(unsigned int, nbits, 32*nwords);
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}
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EXPORT_SYMBOL(bitmap_from_u32array);
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/**
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* bitmap_to_u32array - copy the contents of bitmap to a u32 array of bits
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* @buf: array of u32 (in host byte order), the dest bitmap, non NULL
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* @nwords: number of u32 words in @buf
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* @bitmap: array of unsigned longs, the source bitmap, non NULL
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* @nbits: number of bits in @bitmap
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*
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* copy min(nbits, 32*nwords) bits from @bitmap to @buf. Remaining
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* bits after nbits in @buf (if any) are cleared.
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*
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* Return the number of bits effectively copied.
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*/
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unsigned int
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bitmap_to_u32array(u32 *buf, unsigned int nwords,
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const unsigned long *bitmap, unsigned int nbits)
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{
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unsigned int dst_idx = 0, src_idx = 0;
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while (dst_idx < nwords) {
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unsigned long part = 0;
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if (src_idx < BITS_TO_LONGS(nbits)) {
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part = bitmap[src_idx];
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if (src_idx >= nbits/BITS_PER_LONG)
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part &= BITMAP_LAST_WORD_MASK(nbits);
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src_idx++;
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}
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buf[dst_idx++] = part & 0xffffffffUL;
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#if BITS_PER_LONG == 64
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if (dst_idx < nwords) {
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part >>= 32;
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buf[dst_idx++] = part & 0xffffffffUL;
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}
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#endif
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}
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return min_t(unsigned int, nbits, 32*nwords);
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}
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EXPORT_SYMBOL(bitmap_to_u32array);
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/**
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* bitmap_copy_le - copy a bitmap, putting the bits into little-endian order.
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* @dst: destination buffer
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@ -23,7 +23,7 @@ __check_eq_uint(const char *srcfile, unsigned int line,
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const unsigned int exp_uint, unsigned int x)
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{
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if (exp_uint != x) {
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pr_warn("[%s:%u] expected %u, got %u\n",
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pr_err("[%s:%u] expected %u, got %u\n",
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srcfile, line, exp_uint, x);
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return false;
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}
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@ -33,19 +33,13 @@ __check_eq_uint(const char *srcfile, unsigned int line,
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static bool __init
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__check_eq_bitmap(const char *srcfile, unsigned int line,
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const unsigned long *exp_bmap, unsigned int exp_nbits,
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const unsigned long *bmap, unsigned int nbits)
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const unsigned long *exp_bmap, const unsigned long *bmap,
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unsigned int nbits)
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{
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if (exp_nbits != nbits) {
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pr_warn("[%s:%u] bitmap length mismatch: expected %u, got %u\n",
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srcfile, line, exp_nbits, nbits);
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return false;
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}
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if (!bitmap_equal(exp_bmap, bmap, nbits)) {
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pr_warn("[%s:%u] bitmaps contents differ: expected \"%*pbl\", got \"%*pbl\"\n",
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srcfile, line,
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exp_nbits, exp_bmap, nbits, bmap);
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nbits, exp_bmap, nbits, bmap);
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return false;
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}
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return true;
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@ -66,6 +60,10 @@ __check_eq_pbl(const char *srcfile, unsigned int line,
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return true;
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}
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static bool __init
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__check_eq_u32_array(const char *srcfile, unsigned int line,
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const u32 *exp_arr, unsigned int exp_len,
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const u32 *arr, unsigned int len) __used;
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static bool __init
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__check_eq_u32_array(const char *srcfile, unsigned int line,
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const u32 *exp_arr, unsigned int exp_len,
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@ -255,171 +253,29 @@ static void __init test_bitmap_parselist(void)
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}
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}
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static void __init test_bitmap_u32_array_conversions(void)
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static void __init test_bitmap_arr32(void)
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{
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DECLARE_BITMAP(bmap1, 1024);
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DECLARE_BITMAP(bmap2, 1024);
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u32 exp_arr[32], arr[32];
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unsigned nbits;
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unsigned int nbits, next_bit, len = sizeof(exp) * 8;
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u32 arr[sizeof(exp) / 4];
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DECLARE_BITMAP(bmap2, len);
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for (nbits = 0 ; nbits < 257 ; ++nbits) {
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const unsigned int used_u32s = DIV_ROUND_UP(nbits, 32);
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unsigned int i, rv;
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memset(arr, 0xa5, sizeof(arr));
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bitmap_zero(bmap1, nbits);
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bitmap_set(bmap1, nbits, 1024 - nbits); /* garbage */
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for (nbits = 0; nbits < len; ++nbits) {
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bitmap_to_arr32(arr, exp, nbits);
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bitmap_from_arr32(bmap2, arr, nbits);
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expect_eq_bitmap(bmap2, exp, nbits);
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memset(arr, 0xff, sizeof(arr));
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rv = bitmap_to_u32array(arr, used_u32s, bmap1, nbits);
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expect_eq_uint(nbits, rv);
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next_bit = find_next_bit(bmap2,
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round_up(nbits, BITS_PER_LONG), nbits);
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if (next_bit < round_up(nbits, BITS_PER_LONG))
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pr_err("bitmap_copy_arr32(nbits == %d:"
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" tail is not safely cleared: %d\n",
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nbits, next_bit);
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memset(exp_arr, 0xff, sizeof(exp_arr));
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memset(exp_arr, 0, used_u32s*sizeof(*exp_arr));
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expect_eq_u32_array(exp_arr, 32, arr, 32);
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bitmap_fill(bmap2, 1024);
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rv = bitmap_from_u32array(bmap2, nbits, arr, used_u32s);
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expect_eq_uint(nbits, rv);
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expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
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for (i = 0 ; i < nbits ; ++i) {
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/*
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* test conversion bitmap -> u32[]
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*/
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bitmap_zero(bmap1, 1024);
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__set_bit(i, bmap1);
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bitmap_set(bmap1, nbits, 1024 - nbits); /* garbage */
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memset(arr, 0xff, sizeof(arr));
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rv = bitmap_to_u32array(arr, used_u32s, bmap1, nbits);
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expect_eq_uint(nbits, rv);
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/* 1st used u32 words contain expected bit set, the
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* remaining words are left unchanged (0xff)
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*/
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memset(exp_arr, 0xff, sizeof(exp_arr));
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memset(exp_arr, 0, used_u32s*sizeof(*exp_arr));
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exp_arr[i/32] = (1U<<(i%32));
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expect_eq_u32_array(exp_arr, 32, arr, 32);
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/* same, with longer array to fill
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*/
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memset(arr, 0xff, sizeof(arr));
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rv = bitmap_to_u32array(arr, 32, bmap1, nbits);
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expect_eq_uint(nbits, rv);
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/* 1st used u32 words contain expected bit set, the
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* remaining words are all 0s
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*/
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memset(exp_arr, 0, sizeof(exp_arr));
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exp_arr[i/32] = (1U<<(i%32));
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expect_eq_u32_array(exp_arr, 32, arr, 32);
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/*
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* test conversion u32[] -> bitmap
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*/
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/* the 1st nbits of bmap2 are identical to
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* bmap1, the remaining bits of bmap2 are left
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* unchanged (all 1s)
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*/
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bitmap_fill(bmap2, 1024);
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rv = bitmap_from_u32array(bmap2, nbits,
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exp_arr, used_u32s);
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expect_eq_uint(nbits, rv);
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expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
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/* same, with more bits to fill
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*/
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memset(arr, 0xff, sizeof(arr)); /* garbage */
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memset(arr, 0, used_u32s*sizeof(u32));
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arr[i/32] = (1U<<(i%32));
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bitmap_fill(bmap2, 1024);
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rv = bitmap_from_u32array(bmap2, 1024, arr, used_u32s);
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expect_eq_uint(used_u32s*32, rv);
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/* the 1st nbits of bmap2 are identical to
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* bmap1, the remaining bits of bmap2 are cleared
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*/
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bitmap_zero(bmap1, 1024);
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__set_bit(i, bmap1);
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expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
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/*
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* test short conversion bitmap -> u32[] (1
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* word too short)
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*/
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if (used_u32s > 1) {
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bitmap_zero(bmap1, 1024);
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__set_bit(i, bmap1);
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bitmap_set(bmap1, nbits,
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1024 - nbits); /* garbage */
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memset(arr, 0xff, sizeof(arr));
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rv = bitmap_to_u32array(arr, used_u32s - 1,
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bmap1, nbits);
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expect_eq_uint((used_u32s - 1)*32, rv);
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/* 1st used u32 words contain expected
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* bit set, the remaining words are
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* left unchanged (0xff)
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*/
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memset(exp_arr, 0xff, sizeof(exp_arr));
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memset(exp_arr, 0,
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(used_u32s-1)*sizeof(*exp_arr));
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if ((i/32) < (used_u32s - 1))
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exp_arr[i/32] = (1U<<(i%32));
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expect_eq_u32_array(exp_arr, 32, arr, 32);
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}
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/*
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* test short conversion u32[] -> bitmap (3
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* bits too short)
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*/
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if (nbits > 3) {
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memset(arr, 0xff, sizeof(arr)); /* garbage */
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memset(arr, 0, used_u32s*sizeof(*arr));
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arr[i/32] = (1U<<(i%32));
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bitmap_zero(bmap1, 1024);
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rv = bitmap_from_u32array(bmap1, nbits - 3,
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arr, used_u32s);
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expect_eq_uint(nbits - 3, rv);
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/* we are expecting the bit < nbits -
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* 3 (none otherwise), and the rest of
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* bmap1 unchanged (0-filled)
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*/
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bitmap_zero(bmap2, 1024);
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if (i < nbits - 3)
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__set_bit(i, bmap2);
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expect_eq_bitmap(bmap2, 1024, bmap1, 1024);
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/* do the same with bmap1 initially
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* 1-filled
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*/
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bitmap_fill(bmap1, 1024);
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rv = bitmap_from_u32array(bmap1, nbits - 3,
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arr, used_u32s);
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expect_eq_uint(nbits - 3, rv);
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/* we are expecting the bit < nbits -
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* 3 (none otherwise), and the rest of
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* bmap1 unchanged (1-filled)
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*/
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bitmap_zero(bmap2, 1024);
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if (i < nbits - 3)
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__set_bit(i, bmap2);
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bitmap_set(bmap2, nbits-3, 1024 - nbits + 3);
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expect_eq_bitmap(bmap2, 1024, bmap1, 1024);
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}
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}
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if (nbits < len - 32)
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expect_eq_uint(arr[DIV_ROUND_UP(nbits, 32)],
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0xa5a5a5a5);
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}
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}
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|
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@ -454,7 +310,7 @@ static void noinline __init test_mem_optimisations(void)
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static int __init test_bitmap_init(void)
|
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{
|
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test_zero_fill_copy();
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test_bitmap_u32_array_conversions();
|
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test_bitmap_arr32();
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test_bitmap_parselist();
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test_mem_optimisations();
|
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|
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|
|
|
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|
|
@ -616,18 +616,15 @@ static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
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return -EFAULT;
|
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|
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memcpy(&to->base, &link_usettings.base, sizeof(to->base));
|
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bitmap_from_u32array(to->link_modes.supported,
|
||||
__ETHTOOL_LINK_MODE_MASK_NBITS,
|
||||
link_usettings.link_modes.supported,
|
||||
__ETHTOOL_LINK_MODE_MASK_NU32);
|
||||
bitmap_from_u32array(to->link_modes.advertising,
|
||||
__ETHTOOL_LINK_MODE_MASK_NBITS,
|
||||
link_usettings.link_modes.advertising,
|
||||
__ETHTOOL_LINK_MODE_MASK_NU32);
|
||||
bitmap_from_u32array(to->link_modes.lp_advertising,
|
||||
__ETHTOOL_LINK_MODE_MASK_NBITS,
|
||||
link_usettings.link_modes.lp_advertising,
|
||||
__ETHTOOL_LINK_MODE_MASK_NU32);
|
||||
bitmap_from_arr32(to->link_modes.supported,
|
||||
link_usettings.link_modes.supported,
|
||||
__ETHTOOL_LINK_MODE_MASK_NBITS);
|
||||
bitmap_from_arr32(to->link_modes.advertising,
|
||||
link_usettings.link_modes.advertising,
|
||||
__ETHTOOL_LINK_MODE_MASK_NBITS);
|
||||
bitmap_from_arr32(to->link_modes.lp_advertising,
|
||||
link_usettings.link_modes.lp_advertising,
|
||||
__ETHTOOL_LINK_MODE_MASK_NBITS);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -643,18 +640,15 @@ store_link_ksettings_for_user(void __user *to,
|
|||
struct ethtool_link_usettings link_usettings;
|
||||
|
||||
memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
|
||||
bitmap_to_u32array(link_usettings.link_modes.supported,
|
||||
__ETHTOOL_LINK_MODE_MASK_NU32,
|
||||
from->link_modes.supported,
|
||||
__ETHTOOL_LINK_MODE_MASK_NBITS);
|
||||
bitmap_to_u32array(link_usettings.link_modes.advertising,
|
||||
__ETHTOOL_LINK_MODE_MASK_NU32,
|
||||
from->link_modes.advertising,
|
||||
__ETHTOOL_LINK_MODE_MASK_NBITS);
|
||||
bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
|
||||
__ETHTOOL_LINK_MODE_MASK_NU32,
|
||||
from->link_modes.lp_advertising,
|
||||
__ETHTOOL_LINK_MODE_MASK_NBITS);
|
||||
bitmap_to_arr32(link_usettings.link_modes.supported,
|
||||
from->link_modes.supported,
|
||||
__ETHTOOL_LINK_MODE_MASK_NBITS);
|
||||
bitmap_to_arr32(link_usettings.link_modes.advertising,
|
||||
from->link_modes.advertising,
|
||||
__ETHTOOL_LINK_MODE_MASK_NBITS);
|
||||
bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
|
||||
from->link_modes.lp_advertising,
|
||||
__ETHTOOL_LINK_MODE_MASK_NBITS);
|
||||
|
||||
if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
|
||||
return -EFAULT;
|
||||
|
|
@ -2358,10 +2352,8 @@ static int ethtool_get_per_queue_coalesce(struct net_device *dev,
|
|||
|
||||
useraddr += sizeof(*per_queue_opt);
|
||||
|
||||
bitmap_from_u32array(queue_mask,
|
||||
MAX_NUM_QUEUE,
|
||||
per_queue_opt->queue_mask,
|
||||
DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
|
||||
bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
|
||||
MAX_NUM_QUEUE);
|
||||
|
||||
for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
|
||||
struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
|
||||
|
|
@ -2393,10 +2385,7 @@ static int ethtool_set_per_queue_coalesce(struct net_device *dev,
|
|||
|
||||
useraddr += sizeof(*per_queue_opt);
|
||||
|
||||
bitmap_from_u32array(queue_mask,
|
||||
MAX_NUM_QUEUE,
|
||||
per_queue_opt->queue_mask,
|
||||
DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
|
||||
bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
|
||||
n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
|
||||
tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
|
||||
if (!backup)
|
||||
|
|
|
|||
Loading…
Reference in a new issue