Messages in this thread Patch in this message | | | From | laurentiu.tudor@nxp ... | Subject | [PATCH v3 6/6] dpaa_eth: fix iova handling for sg frames | Date | Thu, 30 May 2019 17:19:51 +0300 |
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From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
The driver relies on the no longer valid assumption that dma addresses (iovas) are identical to physical addressees and uses phys_to_virt() to make iova -> vaddr conversions. Fix this also for scatter-gather frames using the iova -> phys conversion function added in the previous patch. While at it, clean-up a redundant dpaa_bpid2pool() and pass the bp as parameter.
Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> Acked-by: Madalin Bucur <madalin.bucur@nxp.com> --- .../net/ethernet/freescale/dpaa/dpaa_eth.c | 40 +++++++++++-------- 1 file changed, 23 insertions(+), 17 deletions(-)
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c index 46194a04617a..7d978a93dffd 100644 --- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c +++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c @@ -1641,14 +1641,17 @@ static struct sk_buff *dpaa_cleanup_tx_fd(const struct dpaa_priv *priv, if (unlikely(qm_fd_get_format(fd) == qm_fd_sg)) { nr_frags = skb_shinfo(skb)->nr_frags; - dma_unmap_single(dev, addr, - qm_fd_get_offset(fd) + DPAA_SGT_SIZE, - dma_dir); /* The sgt buffer has been allocated with netdev_alloc_frag(), * it's from lowmem. */ - sgt = phys_to_virt(addr + qm_fd_get_offset(fd)); + sgt = phys_to_virt(dpaa_iova_to_phys(priv, + addr + + qm_fd_get_offset(fd))); + + dma_unmap_single(dev, addr, + qm_fd_get_offset(fd) + DPAA_SGT_SIZE, + dma_dir); /* sgt[0] is from lowmem, was dma_map_single()-ed */ dma_unmap_single(dev, qm_sg_addr(&sgt[0]), @@ -1663,7 +1666,7 @@ static struct sk_buff *dpaa_cleanup_tx_fd(const struct dpaa_priv *priv, } /* Free the page frag that we allocated on Tx */ - skb_free_frag(phys_to_virt(addr)); + skb_free_frag(skbh); } else { dma_unmap_single(dev, addr, skb_tail_pointer(skb) - (u8 *)skbh, dma_dir); @@ -1724,14 +1727,14 @@ static struct sk_buff *contig_fd_to_skb(const struct dpaa_priv *priv, * The page fragment holding the S/G Table is recycled here. */ static struct sk_buff *sg_fd_to_skb(const struct dpaa_priv *priv, - const struct qm_fd *fd) + const struct qm_fd *fd, + struct dpaa_bp *dpaa_bp, + void *vaddr) { ssize_t fd_off = qm_fd_get_offset(fd); - dma_addr_t addr = qm_fd_addr(fd); const struct qm_sg_entry *sgt; struct page *page, *head_page; - struct dpaa_bp *dpaa_bp; - void *vaddr, *sg_vaddr; + void *sg_vaddr; int frag_off, frag_len; struct sk_buff *skb; dma_addr_t sg_addr; @@ -1740,7 +1743,6 @@ static struct sk_buff *sg_fd_to_skb(const struct dpaa_priv *priv, int *count_ptr; int i; - vaddr = phys_to_virt(addr); WARN_ON(!IS_ALIGNED((unsigned long)vaddr, SMP_CACHE_BYTES)); /* Iterate through the SGT entries and add data buffers to the skb */ @@ -1751,14 +1753,17 @@ static struct sk_buff *sg_fd_to_skb(const struct dpaa_priv *priv, WARN_ON(qm_sg_entry_is_ext(&sgt[i])); sg_addr = qm_sg_addr(&sgt[i]); - sg_vaddr = phys_to_virt(sg_addr); - WARN_ON(!IS_ALIGNED((unsigned long)sg_vaddr, - SMP_CACHE_BYTES)); /* We may use multiple Rx pools */ dpaa_bp = dpaa_bpid2pool(sgt[i].bpid); - if (!dpaa_bp) + if (!dpaa_bp) { + pr_info("%s: fail to get dpaa_bp for sg bpid %d\n", + __func__, sgt[i].bpid); goto free_buffers; + } + sg_vaddr = phys_to_virt(dpaa_iova_to_phys(priv, sg_addr)); + WARN_ON(!IS_ALIGNED((unsigned long)sg_vaddr, + SMP_CACHE_BYTES)); count_ptr = this_cpu_ptr(dpaa_bp->percpu_count); dma_unmap_single(dpaa_bp->dev, sg_addr, dpaa_bp->size, @@ -1830,10 +1835,11 @@ static struct sk_buff *sg_fd_to_skb(const struct dpaa_priv *priv, /* free all the SG entries */ for (i = 0; i < DPAA_SGT_MAX_ENTRIES ; i++) { sg_addr = qm_sg_addr(&sgt[i]); - sg_vaddr = phys_to_virt(sg_addr); - skb_free_frag(sg_vaddr); dpaa_bp = dpaa_bpid2pool(sgt[i].bpid); if (dpaa_bp) { + sg_addr = dpaa_iova_to_phys(priv, sg_addr); + sg_vaddr = phys_to_virt(sg_addr); + skb_free_frag(sg_vaddr); count_ptr = this_cpu_ptr(dpaa_bp->percpu_count); (*count_ptr)--; } @@ -2326,7 +2332,7 @@ static enum qman_cb_dqrr_result rx_default_dqrr(struct qman_portal *portal, if (likely(fd_format == qm_fd_contig)) skb = contig_fd_to_skb(priv, fd, dpaa_bp, vaddr); else - skb = sg_fd_to_skb(priv, fd); + skb = sg_fd_to_skb(priv, fd, dpaa_bp, vaddr); if (!skb) return qman_cb_dqrr_consume; -- 2.17.1
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