On 2016/4/24 15:54, Leon Romanovsky wrote: > On Sat, Apr 23, 2016 at 06:26:47PM +0800, Lijun Ou wrote: >> This patch mainly setup hca for RoCE. it will do a series of >> initial works as follows: >> 1. init uar table, allocate uar resource >> 2. init pd table >> 3. init cq table >> 4. init mr table >> 5. init qp table >> >> Signed-off-by: Lijun Ou <ouli...@huawei.com> >> Signed-off-by: Wei Hu(Xavier) <xavier.hu...@huawei.com> >> --- >> drivers/infiniband/hw/hns/hns_roce_alloc.c | 104 ++++++++++++++++ >> drivers/infiniband/hw/hns/hns_roce_cq.c | 25 ++++ >> drivers/infiniband/hw/hns/hns_roce_device.h | 69 ++++++++++ >> drivers/infiniband/hw/hns/hns_roce_eq.c | 1 - >> drivers/infiniband/hw/hns/hns_roce_icm.c | 88 +++++++++++++ >> drivers/infiniband/hw/hns/hns_roce_icm.h | 9 ++ >> drivers/infiniband/hw/hns/hns_roce_main.c | 79 ++++++++++++ >> drivers/infiniband/hw/hns/hns_roce_mr.c | 187 >> ++++++++++++++++++++++++++++ >> drivers/infiniband/hw/hns/hns_roce_pd.c | 65 ++++++++++ >> drivers/infiniband/hw/hns/hns_roce_qp.c | 30 +++++ >> 10 files changed, 656 insertions(+), 1 deletion(-) >> create mode 100644 drivers/infiniband/hw/hns/hns_roce_alloc.c >> create mode 100644 drivers/infiniband/hw/hns/hns_roce_mr.c >> create mode 100644 drivers/infiniband/hw/hns/hns_roce_pd.c >> >> diff --git a/drivers/infiniband/hw/hns/hns_roce_alloc.c >> b/drivers/infiniband/hw/hns/hns_roce_alloc.c >> new file mode 100644 >> index 0000000..0c76f1b >> --- /dev/null >> +++ b/drivers/infiniband/hw/hns/hns_roce_alloc.c >> @@ -0,0 +1,104 @@ >> +/* >> + * Copyright (c) 2016 Hisilicon Limited. >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License as published by >> + * the Free Software Foundation; either version 2 of the License, or >> + * (at your option) any later version. >> + */ >> + >> +#include <linux/bitmap.h> >> +#include <linux/dma-mapping.h> >> +#include <linux/errno.h> >> +#include <linux/mm.h> >> +#include <linux/slab.h> >> +#include <linux/vmalloc.h> >> +#include "hns_roce_device.h" >> + >> +int hns_roce_bitmap_alloc(struct hns_roce_bitmap *bitmap, u32 *obj) >> +{ >> + int ret = 0; >> + >> + spin_lock(&bitmap->lock); >> + *obj = find_next_zero_bit(bitmap->table, bitmap->max, bitmap->last); >> + if (*obj >= bitmap->max) { >> + bitmap->top = (bitmap->top + bitmap->max + bitmap->reserved_top) >> + & bitmap->mask; >> + *obj = find_first_zero_bit(bitmap->table, bitmap->max); > > find_first_zero_bit function returns "unsigned long" which may or may > not be equal to u32 on some architectures. > Hi Leon, I appreciate your keen eye. this code is meant for ARM64bit therefore should run corretly for 64-bit AARCH64. I will consider changing it as part of good partice and better portability " I will give a primary plan to modified it. for example: *obj = (u32)find_next_zero_bit(bitmap->table, bitmap->max, bitmap->last); Beause the max size of bitmap->table is u32 in current version.
int hns_roce_bitmap_init(struct hns_roce_bitmap *bitmap, u32 num, u32 mask, u32 reserved_bot, u32 reserved_top) { u32 i; if (num != roundup_pow_of_two(num)) return -EINVAL; bitmap->last = 0; bitmap->top = 0; bitmap->max = num - reserved_top; bitmap->mask = mask; bitmap->reserved_top = reserved_top; spin_lock_init(&bitmap->lock); bitmap->table = kcalloc(BITS_TO_LONGS(bitmap->max), sizeof(long), GFP_KERNEL); Is this plan ok? Thanks Lijun Ou