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From: Alejandro Lucero <alejandro.lucero@netronome.com>
To: dev@dpdk.org
Cc: stable@dpdk.org
Subject: [dpdk-dev] [PATCH 4/5] net/nfp: check hugepages IOVAs based on DMA mask
Date: Thu, 30 Aug 2018 16:21:31 +0100	[thread overview]
Message-ID: <1535642492-21831-5-git-send-email-alejandro.lucero@netronome.com> (raw)
In-Reply-To: <1535642492-21831-1-git-send-email-alejandro.lucero@netronome.com>

NFP devices can not handle DMA addresses requiring more than
40 bits. This patch uses rte_dev_check_dma_mask with 40 bits
and avoids device initialization if memory out of NFP range.

Signed-off-by: Alejandro Lucero <alejandro.lucero@netronome.com>
---
 drivers/net/nfp/nfp_net.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c
index 6e5e305..aedca31 100644
--- a/drivers/net/nfp/nfp_net.c
+++ b/drivers/net/nfp/nfp_net.c
@@ -2688,6 +2688,14 @@ uint32_t nfp_net_txq_full(struct nfp_net_txq *txq)
 
 	pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
 
+	/* NFP can not handle DMA addresses requiring more than 40 bits */
+	if (rte_eal_check_dma_mask(40) < 0) {
+		RTE_LOG(INFO, PMD, "device %s can not be used:",
+				   pci_dev->device.name);
+		RTE_LOG(INFO, PMD, "\trestricted dma mask to 40 bits!\n");
+		return -ENODEV;
+	};
+
 	if ((pci_dev->id.device_id == PCI_DEVICE_ID_NFP4000_PF_NIC) ||
 	    (pci_dev->id.device_id == PCI_DEVICE_ID_NFP6000_PF_NIC)) {
 		port = get_pf_port_number(eth_dev->data->name);
-- 
1.9.1

  parent reply	other threads:[~2018-08-30 15:22 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-30 15:21 [dpdk-dev] [PATH 0/5] use IOVAs check " Alejandro Lucero
2018-08-30 15:21 ` [dpdk-dev] [PATCH 1/5] mem: add function for checking memsegs IOVAs addresses Alejandro Lucero
2018-08-30 15:21 ` [dpdk-dev] [PATCH 2/5] mem: use address hint for mapping hugepages Alejandro Lucero
2018-08-30 15:21 ` [dpdk-dev] [PATCH 3/5] bus/pci: use IOVAs check when setting IOVA mode Alejandro Lucero
2018-08-30 15:21 ` Alejandro Lucero [this message]
2018-08-30 15:21 ` [dpdk-dev] [PATCH 5/5] net/nfp: support IOVA VA mode Alejandro Lucero
2018-08-31 11:33 ` [dpdk-dev] [PATH 0/5] use IOVAs check based on DMA mask Alejandro Lucero

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