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IB/hns: Change the logic for allocating uar registers

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This patch mainly modifies the logic for allocating uar registers.
In HiP06 SoC, HW has 8 group of uar registers for kernel and
user space application. The uar index is assigned as follows:
    0   ------ for kernel
    1~7 ------ for user space application

Signed-off-by: Lijun Ou <oulijun@huawei.com>
Reviewed-by: Wei Hu <xavier.huwei@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Lijun Ou
2016-09-15 23:48:11 +01:00
committed by Doug Ledford
parent 7716809efe
commit b280db52cc
1 changed files with 3 additions and 1 deletions
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4
drivers/infiniband/hw/hns/hns_roce_pd.c
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@@ -117,7 +117,9 @@ int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
if (ret == -1)
return -ENOMEM;
uar->index = (uar->index - 1) % hr_dev->caps.phy_num_uars + 1;
if (uar->index > 0)
uar->index = (uar->index - 1) %
(hr_dev->caps.phy_num_uars - 1) + 1;
res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index;