lkml.org 
[lkml]   [2015]   [May]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3.13.y-ckt 88/95] mlx5_core: Fix PowerPC support
Date
3.13.11-ckt21 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eli Cohen <eli@dev.mellanox.co.il>

commit 05bdb2ab6b09f2306f0afe0f60f4b9abffa7aba4 upstream.

1. Fix derivation of sub-page index from the dma address in free_4k.
2. Fix the DMA address passed to dma_unmap_page by masking it properly.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c | 9 +++++----
include/linux/mlx5/device.h | 3 ++-
2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
index 37b6ad1..9959199 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
@@ -99,7 +99,7 @@ enum {

enum {
MLX5_MAX_RECLAIM_TIME_MILI = 5000,
- MLX5_NUM_4K_IN_PAGE = PAGE_SIZE / 4096,
+ MLX5_NUM_4K_IN_PAGE = PAGE_SIZE / MLX5_ADAPTER_PAGE_SIZE,
};

static int insert_page(struct mlx5_core_dev *dev, u64 addr, struct page *page, u16 func_id)
@@ -208,7 +208,7 @@ static int alloc_4k(struct mlx5_core_dev *dev, u64 *addr)
if (!fp->free_count)
list_del(&fp->list);

- *addr = fp->addr + n * 4096;
+ *addr = fp->addr + n * MLX5_ADAPTER_PAGE_SIZE;

return 0;
}
@@ -224,14 +224,15 @@ static void free_4k(struct mlx5_core_dev *dev, u64 addr)
return;
}

- n = (addr & ~PAGE_MASK) % 4096;
+ n = (addr & ~PAGE_MASK) >> MLX5_ADAPTER_PAGE_SHIFT;
fwp->free_count++;
set_bit(n, &fwp->bitmask);
if (fwp->free_count == MLX5_NUM_4K_IN_PAGE) {
rb_erase(&fwp->rb_node, &dev->priv.page_root);
if (fwp->free_count != 1)
list_del(&fwp->list);
- dma_unmap_page(&dev->pdev->dev, addr, PAGE_SIZE, DMA_BIDIRECTIONAL);
+ dma_unmap_page(&dev->pdev->dev, addr & PAGE_MASK, PAGE_SIZE,
+ DMA_BIDIRECTIONAL);
__free_page(fwp->page);
kfree(fwp);
} else if (fwp->free_count == 1) {
diff --git a/include/linux/mlx5/device.h b/include/linux/mlx5/device.h
index da78875..90a3b45 100644
--- a/include/linux/mlx5/device.h
+++ b/include/linux/mlx5/device.h
@@ -231,7 +231,8 @@ enum {
};

enum {
- MLX5_ADAPTER_PAGE_SHIFT = 12
+ MLX5_ADAPTER_PAGE_SHIFT = 12,
+ MLX5_ADAPTER_PAGE_SIZE = 1 << MLX5_ADAPTER_PAGE_SHIFT,
};

enum {
--
1.9.1


\
 
 \ /
  Last update: 2015-05-27 21:41    [W:0.296 / U:0.524 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site