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IB/mlx5: Decrease memory consumption of mr caches

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Change the logic so we do not allocate memory nor map the device
before actually posting to the REG_UMR QP. In addition, unmap and free
the memory after we get completion.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Eli Cohen 2013-09-11 16:35:26 +03:00 committed by Roland Dreier
parent c1868b8225
commit 203099fd73
1 changed files with 22 additions and 35 deletions
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57
drivers/infiniband/hw/mlx5/mr.c
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@ -61,13 +61,11 @@ static int order2idx(struct mlx5_ib_dev *dev, int order)
static int add_keys(struct mlx5_ib_dev *dev, int c, int num)
{
struct device *ddev = dev->ib_dev.dma_device;
struct mlx5_mr_cache *cache = &dev->cache;
struct mlx5_cache_ent *ent = &cache->ent[c];
struct mlx5_create_mkey_mbox_in *in;
struct mlx5_ib_mr *mr;
int npages = 1 << ent->order;
int size = sizeof(u64) * npages;
int err = 0;
int i;
@ -83,21 +81,6 @@ static int add_keys(struct mlx5_ib_dev *dev, int c, int num)
}
mr->order = ent->order;
mr->umred = 1;
mr->pas = kmalloc(size + 0x3f, GFP_KERNEL);
if (!mr->pas) {
kfree(mr);
err = -ENOMEM;
goto out;
}
mr->dma = dma_map_single(ddev, mr_align(mr->pas, 0x40), size,
DMA_TO_DEVICE);
if (dma_mapping_error(ddev, mr->dma)) {
kfree(mr->pas);
kfree(mr);
err = -ENOMEM;
goto out;
}
in->seg.status = 1 << 6;
in->seg.xlt_oct_size = cpu_to_be32((npages + 1) / 2);
in->seg.qpn_mkey7_0 = cpu_to_be32(0xffffff << 8);
@ -108,8 +91,6 @@ static int add_keys(struct mlx5_ib_dev *dev, int c, int num)
sizeof(*in));
if (err) {
mlx5_ib_warn(dev, "create mkey failed %d\n", err);
dma_unmap_single(ddev, mr->dma, size, DMA_TO_DEVICE);
kfree(mr->pas);
kfree(mr);
goto out;
}
@ -129,11 +110,9 @@ static int add_keys(struct mlx5_ib_dev *dev, int c, int num)
static void remove_keys(struct mlx5_ib_dev *dev, int c, int num)
{
struct device *ddev = dev->ib_dev.dma_device;
struct mlx5_mr_cache *cache = &dev->cache;
struct mlx5_cache_ent *ent = &cache->ent[c];
struct mlx5_ib_mr *mr;
int size;
int err;
int i;
@ -149,14 +128,10 @@ static void remove_keys(struct mlx5_ib_dev *dev, int c, int num)
ent->size--;
spin_unlock(&ent->lock);
err = mlx5_core_destroy_mkey(&dev->mdev, &mr->mmr);
if (err) {
if (err)
mlx5_ib_warn(dev, "failed destroy mkey\n");
} else {
size = ALIGN(sizeof(u64) * (1 << mr->order), 0x40);
dma_unmap_single(ddev, mr->dma, size, DMA_TO_DEVICE);
kfree(mr->pas);
else
kfree(mr);
}
}
}
@ -408,11 +383,9 @@ static void free_cached_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
static void clean_keys(struct mlx5_ib_dev *dev, int c)
{
struct device *ddev = dev->ib_dev.dma_device;
struct mlx5_mr_cache *cache = &dev->cache;
struct mlx5_cache_ent *ent = &cache->ent[c];
struct mlx5_ib_mr *mr;
int size;
int err;
cancel_delayed_work(&ent->dwork);
@ -428,14 +401,10 @@ static void clean_keys(struct mlx5_ib_dev *dev, int c)
ent->size--;
spin_unlock(&ent->lock);
err = mlx5_core_destroy_mkey(&dev->mdev, &mr->mmr);
if (err) {
if (err)
mlx5_ib_warn(dev, "failed destroy mkey\n");
} else {
size = ALIGN(sizeof(u64) * (1 << mr->order), 0x40);
dma_unmap_single(ddev, mr->dma, size, DMA_TO_DEVICE);
kfree(mr->pas);
else
kfree(mr);
}
}
}
@ -678,10 +647,12 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
int page_shift, int order, int access_flags)
{
struct mlx5_ib_dev *dev = to_mdev(pd->device);
struct device *ddev = dev->ib_dev.dma_device;
struct umr_common *umrc = &dev->umrc;
struct ib_send_wr wr, *bad;
struct mlx5_ib_mr *mr;
struct ib_sge sg;
int size = sizeof(u64) * npages;
int err;
int i;
@ -700,6 +671,19 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
if (!mr)
return ERR_PTR(-EAGAIN);
mr->pas = kmalloc(size + 0x3f, GFP_KERNEL);
if (!mr->pas) {
err = -ENOMEM;
goto error;
}
mr->dma = dma_map_single(ddev, mr_align(mr->pas, 0x40), size,
DMA_TO_DEVICE);
if (dma_mapping_error(ddev, mr->dma)) {
kfree(mr->pas);
err = -ENOMEM;
goto error;
}
mlx5_ib_populate_pas(dev, umem, page_shift, mr_align(mr->pas, 0x40), 1);
memset(&wr, 0, sizeof(wr));
@ -721,6 +705,9 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
wait_for_completion(&mr->done);
up(&umrc->sem);
dma_unmap_single(ddev, mr->dma, size, DMA_TO_DEVICE);
kfree(mr->pas);
if (mr->status != IB_WC_SUCCESS) {
mlx5_ib_warn(dev, "reg umr failed\n");
err = -EFAULT;