On 2016/4/26 22:18, Leon Romanovsky wrote:
> On Tue, Apr 26, 2016 at 02:34:44PM +0800, oulijun wrote:
>> 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?
>
> No,
> You are submitting new driver, please do it properly (without casting)
> from the beginning.
>
oh, i see. I will give a better plan to modify it.
Thanks
Lijun Ou
>>
>> Thanks
>> Lijun Ou
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
>> the body of a message to majord...@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
