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ionic: contiguous memory for notifyq 

The event notification queue is set up a little differently in the
NIC and so the notifyq q and cq descriptor structures need to be
contiguous, which got missed in an earlier patch that separated
out the q and cq descriptor allocations.  That patch was aimed at
making the big tx and rx descriptor queue allocations easier to
manage - the notifyq is much smaller and doesn't need to be split.
This patch simply adds an if/else and slightly different code for
the notifyq descriptor allocation.

Fixes: ea5a8b09dc ("ionic: reduce contiguous memory allocation requirement")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shannon Nelson 2020-10-01 09:22:39 -07:00 committed by David S. Miller
parent 7b419e658f
commit 9576a36cc1
1 changed files with 47 additions and 22 deletions
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69
drivers/net/ethernet/pensando/ionic/ionic_lif.c
View File

@ -518,30 +518,55 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
goto err_out_free_cq_info;
}
new->q_size = PAGE_SIZE + (num_descs * desc_size);
new->q_base = dma_alloc_coherent(dev, new->q_size, &new->q_base_pa,
GFP_KERNEL);
if (!new->q_base) {
netdev_err(lif->netdev, "Cannot allocate queue DMA memory\n");
err = -ENOMEM;
goto err_out_free_cq_info;
}
q_base = PTR_ALIGN(new->q_base, PAGE_SIZE);
q_base_pa = ALIGN(new->q_base_pa, PAGE_SIZE);
ionic_q_map(&new->q, q_base, q_base_pa);
if (flags & IONIC_QCQ_F_NOTIFYQ) {
int q_size, cq_size;
new->cq_size = PAGE_SIZE + (num_descs * cq_desc_size);
new->cq_base = dma_alloc_coherent(dev, new->cq_size, &new->cq_base_pa,
GFP_KERNEL);
if (!new->cq_base) {
netdev_err(lif->netdev, "Cannot allocate cq DMA memory\n");
err = -ENOMEM;
goto err_out_free_q;
/* q & cq need to be contiguous in case of notifyq */
q_size = ALIGN(num_descs * desc_size, PAGE_SIZE);
cq_size = ALIGN(num_descs * cq_desc_size, PAGE_SIZE);
new->q_size = PAGE_SIZE + q_size + cq_size;
new->q_base = dma_alloc_coherent(dev, new->q_size,
&new->q_base_pa, GFP_KERNEL);
if (!new->q_base) {
netdev_err(lif->netdev, "Cannot allocate qcq DMA memory\n");
err = -ENOMEM;
goto err_out_free_cq_info;
}
q_base = PTR_ALIGN(new->q_base, PAGE_SIZE);
q_base_pa = ALIGN(new->q_base_pa, PAGE_SIZE);
ionic_q_map(&new->q, q_base, q_base_pa);
cq_base = PTR_ALIGN(q_base + q_size, PAGE_SIZE);
cq_base_pa = ALIGN(new->q_base_pa + q_size, PAGE_SIZE);
ionic_cq_map(&new->cq, cq_base, cq_base_pa);
ionic_cq_bind(&new->cq, &new->q);
} else {
new->q_size = PAGE_SIZE + (num_descs * desc_size);
new->q_base = dma_alloc_coherent(dev, new->q_size, &new->q_base_pa,
GFP_KERNEL);
if (!new->q_base) {
netdev_err(lif->netdev, "Cannot allocate queue DMA memory\n");
err = -ENOMEM;
goto err_out_free_cq_info;
}
q_base = PTR_ALIGN(new->q_base, PAGE_SIZE);
q_base_pa = ALIGN(new->q_base_pa, PAGE_SIZE);
ionic_q_map(&new->q, q_base, q_base_pa);
new->cq_size = PAGE_SIZE + (num_descs * cq_desc_size);
new->cq_base = dma_alloc_coherent(dev, new->cq_size, &new->cq_base_pa,
GFP_KERNEL);
if (!new->cq_base) {
netdev_err(lif->netdev, "Cannot allocate cq DMA memory\n");
err = -ENOMEM;
goto err_out_free_q;
}
cq_base = PTR_ALIGN(new->cq_base, PAGE_SIZE);
cq_base_pa = ALIGN(new->cq_base_pa, PAGE_SIZE);
ionic_cq_map(&new->cq, cq_base, cq_base_pa);
ionic_cq_bind(&new->cq, &new->q);
}
cq_base = PTR_ALIGN(new->cq_base, PAGE_SIZE);
cq_base_pa = ALIGN(new->cq_base_pa, PAGE_SIZE);
ionic_cq_map(&new->cq, cq_base, cq_base_pa);
ionic_cq_bind(&new->cq, &new->q);
if (flags & IONIC_QCQ_F_SG) {
new->sg_size = PAGE_SIZE + (num_descs * sg_desc_size);