1 files changed, 385 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c b/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c
new file mode 100644
index 000000000000..e2b22b8a20f1
--- /dev/null
+++ b/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c
@@ -0,0 +1,385 @@
+/*
+ * Copyright (C) 2015 Netronome Systems, Inc.
+ *
+ * This software is dual licensed under the GNU General License Version 2,
+ * June 1991 as shown in the file COPYING in the top-level directory of this
+ * source tree or the BSD 2-Clause License provided below.  You have the
+ * option to license this software under the complete terms of either license.
+ *
+ * The BSD 2-Clause License:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      1. Redistributions of source code must retain the above
+ *         copyright notice, this list of conditions and the following
+ *         disclaimer.
+ *
+ *      2. Redistributions in binary form must reproduce the above
+ *         copyright notice, this list of conditions and the following
+ *         disclaimer in the documentation and/or other materials
+ *         provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * nfp_netvf_main.c
+ * Netronome virtual function network device driver: Main entry point
+ * Author: Jason McMullan <jason.mcmullan@netronome.com>
+ *         Rolf Neugebauer <rolf.neugebauer@netronome.com>
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/etherdevice.h>
+
+#include "nfp_net_ctrl.h"
+#include "nfp_net.h"
+
+const char nfp_net_driver_name[] = "nfp_netvf";
+const char nfp_net_driver_version[] = "0.1";
+#define PCI_DEVICE_NFP6000VF		0x6003
+static const struct pci_device_id nfp_netvf_pci_device_ids[] = {
+	{ PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_NFP6000VF,
+	  PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID,
+	  PCI_ANY_ID, 0,
+	},
+	{ 0, } /* Required last entry. */
+};
+MODULE_DEVICE_TABLE(pci, nfp_netvf_pci_device_ids);
+
+static void nfp_netvf_get_mac_addr(struct nfp_net *nn)
+{
+	u8 mac_addr[ETH_ALEN];
+
+	put_unaligned_be32(nn_readl(nn, NFP_NET_CFG_MACADDR + 0), &mac_addr[0]);
+	/* We can't do readw for NFP-3200 compatibility */
+	put_unaligned_be16(nn_readl(nn, NFP_NET_CFG_MACADDR + 4) >> 16,
+			   &mac_addr[4]);
+
+	if (!is_valid_ether_addr(mac_addr)) {
+		eth_hw_addr_random(nn->netdev);
+		return;
+	}
+
+	ether_addr_copy(nn->netdev->dev_addr, mac_addr);
+	ether_addr_copy(nn->netdev->perm_addr, mac_addr);
+}
+
+static int nfp_netvf_pci_probe(struct pci_dev *pdev,
+			       const struct pci_device_id *pci_id)
+{
+	struct nfp_net_fw_version fw_ver;
+	int max_tx_rings, max_rx_rings;
+	u32 tx_bar_off, rx_bar_off;
+	u32 tx_bar_sz, rx_bar_sz;
+	int tx_bar_no, rx_bar_no;
+	u8 __iomem *ctrl_bar;
+	struct nfp_net *nn;
+	int is_nfp3200;
+	u32 startq;
+	int stride;
+	int err;
+
+	err = pci_enable_device_mem(pdev);
+	if (err)
+		return err;
+
+	err = pci_request_regions(pdev, nfp_net_driver_name);
+	if (err) {
+		dev_err(&pdev->dev, "Unable to allocate device memory.\n");
+		goto err_pci_disable;
+	}
+
+	switch (pdev->device) {
+	case PCI_DEVICE_NFP6000VF:
+		is_nfp3200 = 0;
+		break;
+	default:
+		err = -ENODEV;
+		goto err_pci_regions;
+	}
+
+	pci_set_master(pdev);
+
+	err = dma_set_mask_and_coherent(&pdev->dev,
+					DMA_BIT_MASK(NFP_NET_MAX_DMA_BITS));
+	if (err)
+		goto err_pci_regions;
+
+	/* Map the Control BAR.
+	 *
+	 * Irrespective of the advertised BAR size we only map the
+	 * first NFP_NET_CFG_BAR_SZ of the BAR.  This keeps the code
+	 * the identical for PF and VF drivers.
+	 */
+	ctrl_bar = ioremap_nocache(pci_resource_start(pdev, NFP_NET_CRTL_BAR),
+				   NFP_NET_CFG_BAR_SZ);
+	if (!ctrl_bar) {
+		dev_err(&pdev->dev,
+			"Failed to map resource %d\n", NFP_NET_CRTL_BAR);
+		err = -EIO;
+		goto err_pci_regions;
+	}
+
+	nfp_net_get_fw_version(&fw_ver, ctrl_bar);
+	if (fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
+		dev_err(&pdev->dev, "Unknown Firmware ABI %d.%d.%d.%d\n",
+			fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor);
+		err = -EINVAL;
+		goto err_ctrl_unmap;
+	}
+
+	/* Determine stride */
+	if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 0) ||
+	    nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1) ||
+	    nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0x12, 0x48)) {
+		stride = 2;
+		tx_bar_no = NFP_NET_Q0_BAR;
+		rx_bar_no = NFP_NET_Q1_BAR;
+		dev_warn(&pdev->dev, "OBSOLETE Firmware detected - VF isolation not available\n");
+	} else {
+		switch (fw_ver.major) {
+		case 1 ... 3:
+			if (is_nfp3200) {
+				stride = 2;
+				tx_bar_no = NFP_NET_Q0_BAR;
+				rx_bar_no = NFP_NET_Q1_BAR;
+			} else {
+				stride = 4;
+				tx_bar_no = NFP_NET_Q0_BAR;
+				rx_bar_no = tx_bar_no;
+			}
+			break;
+		default:
+			dev_err(&pdev->dev, "Unsupported Firmware ABI %d.%d.%d.%d\n",
+				fw_ver.resv, fw_ver.class,
+				fw_ver.major, fw_ver.minor);
+			err = -EINVAL;
+			goto err_ctrl_unmap;
+		}
+	}
+
+	/* Find out how many rings are supported */
+	max_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS);
+	max_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS);
+
+	tx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_tx_rings * stride;
+	rx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_rx_rings * stride;
+
+	/* Sanity checks */
+	if (tx_bar_sz > pci_resource_len(pdev, tx_bar_no)) {
+		dev_err(&pdev->dev,
+			"TX BAR too small for number of TX rings. Adjusting\n");
+		tx_bar_sz = pci_resource_len(pdev, tx_bar_no);
+		max_tx_rings = (tx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2;
+	}
+	if (rx_bar_sz > pci_resource_len(pdev, rx_bar_no)) {
+		dev_err(&pdev->dev,
+			"RX BAR too small for number of RX rings. Adjusting\n");
+		rx_bar_sz = pci_resource_len(pdev, rx_bar_no);
+		max_rx_rings = (rx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2;
+	}
+
+	/* XXX Implement a workaround for THB-350 here.  Ideally, we
+	 * have a different PCI ID for A rev VFs.
+	 */
+	switch (pdev->device) {
+	case PCI_DEVICE_NFP6000VF:
+		startq = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
+		tx_bar_off = NFP_PCIE_QUEUE(startq);
+		startq = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
+		rx_bar_off = NFP_PCIE_QUEUE(startq);
+		break;
+	default:
+		err = -ENODEV;
+		goto err_ctrl_unmap;
+	}
+
+	/* Allocate and initialise the netdev */
+	nn = nfp_net_netdev_alloc(pdev, max_tx_rings, max_rx_rings);
+	if (IS_ERR(nn)) {
+		err = PTR_ERR(nn);
+		goto err_ctrl_unmap;
+	}
+
+	nn->fw_ver = fw_ver;
+	nn->ctrl_bar = ctrl_bar;
+	nn->is_vf = 1;
+	nn->is_nfp3200 = is_nfp3200;
+	nn->stride_tx = stride;
+	nn->stride_rx = stride;
+
+	if (rx_bar_no == tx_bar_no) {
+		u32 bar_off, bar_sz;
+		resource_size_t map_addr;
+
+		/* Make a single overlapping BAR mapping */
+		if (tx_bar_off < rx_bar_off)
+			bar_off = tx_bar_off;
+		else
+			bar_off = rx_bar_off;
+
+		if ((tx_bar_off + tx_bar_sz) > (rx_bar_off + rx_bar_sz))
+			bar_sz = (tx_bar_off + tx_bar_sz) - bar_off;
+		else
+			bar_sz = (rx_bar_off + rx_bar_sz) - bar_off;
+
+		map_addr = pci_resource_start(pdev, tx_bar_no) + bar_off;
+		nn->q_bar = ioremap_nocache(map_addr, bar_sz);
+		if (!nn->q_bar) {
+			nn_err(nn, "Failed to map resource %d\n", tx_bar_no);
+			err = -EIO;
+			goto err_netdev_free;
+		}
+
+		/* TX queues */
+		nn->tx_bar = nn->q_bar + (tx_bar_off - bar_off);
+		/* RX queues */
+		nn->rx_bar = nn->q_bar + (rx_bar_off - bar_off);
+	} else {
+		resource_size_t map_addr;
+
+		/* TX queues */
+		map_addr = pci_resource_start(pdev, tx_bar_no) + tx_bar_off;
+		nn->tx_bar = ioremap_nocache(map_addr, tx_bar_sz);
+		if (!nn->tx_bar) {
+			nn_err(nn, "Failed to map resource %d\n", tx_bar_no);
+			err = -EIO;
+			goto err_netdev_free;
+		}
+
+		/* RX queues */
+		map_addr = pci_resource_start(pdev, rx_bar_no) + rx_bar_off;
+		nn->rx_bar = ioremap_nocache(map_addr, rx_bar_sz);
+		if (!nn->rx_bar) {
+			nn_err(nn, "Failed to map resource %d\n", rx_bar_no);
+			err = -EIO;
+			goto err_unmap_tx;
+		}
+	}
+
+	nfp_netvf_get_mac_addr(nn);
+
+	err = nfp_net_irqs_alloc(nn);
+	if (!err) {
+		nn_warn(nn, "Unable to allocate MSI-X Vectors. Exiting\n");
+		err = -EIO;
+		goto err_unmap_rx;
+	}
+
+	/* Get ME clock frequency from ctrl BAR
+	 * XXX for now frequency is hardcoded until we figure out how
+	 * to get the value from nfp-hwinfo into ctrl bar
+	 */
+	nn->me_freq_mhz = 1200;
+
+	err = nfp_net_netdev_init(nn->netdev);
+	if (err)
+		goto err_irqs_disable;
+
+	pci_set_drvdata(pdev, nn);
+
+	nfp_net_info(nn);
+	nfp_net_debugfs_adapter_add(nn);
+
+	return 0;
+
+err_irqs_disable:
+	nfp_net_irqs_disable(nn);
+err_unmap_rx:
+	if (!nn->q_bar)
+		iounmap(nn->rx_bar);
+err_unmap_tx:
+	if (!nn->q_bar)
+		iounmap(nn->tx_bar);
+	else
+		iounmap(nn->q_bar);
+err_netdev_free:
+	pci_set_drvdata(pdev, NULL);
+	nfp_net_netdev_free(nn);
+err_ctrl_unmap:
+	iounmap(ctrl_bar);
+err_pci_regions:
+	pci_release_regions(pdev);
+err_pci_disable:
+	pci_disable_device(pdev);
+	return err;
+}
+
+static void nfp_netvf_pci_remove(struct pci_dev *pdev)
+{
+	struct nfp_net *nn = pci_get_drvdata(pdev);
+
+	/* Note, the order is slightly different from above as we need
+	 * to keep the nn pointer around till we have freed everything.
+	 */
+	nfp_net_debugfs_adapter_del(nn);
+
+	nfp_net_netdev_clean(nn->netdev);
+
+	nfp_net_irqs_disable(nn);
+
+	if (!nn->q_bar) {
+		iounmap(nn->rx_bar);
+		iounmap(nn->tx_bar);
+	} else {
+		iounmap(nn->q_bar);
+	}
+	iounmap(nn->ctrl_bar);
+
+	pci_set_drvdata(pdev, NULL);
+
+	nfp_net_netdev_free(nn);
+
+	pci_release_regions(pdev);
+	pci_disable_device(pdev);
+}
+
+static struct pci_driver nfp_netvf_pci_driver = {
+	.name        = nfp_net_driver_name,
+	.id_table    = nfp_netvf_pci_device_ids,
+	.probe       = nfp_netvf_pci_probe,
+	.remove      = nfp_netvf_pci_remove,
+};
+
+static int __init nfp_netvf_init(void)
+{
+	int err;
+
+	pr_info("%s: NFP VF Network driver, Copyright (C) 2014-2015 Netronome Systems\n",
+		nfp_net_driver_name);
+
+	nfp_net_debugfs_create();
+	err = pci_register_driver(&nfp_netvf_pci_driver);
+	if (err) {
+		nfp_net_debugfs_destroy();
+		return err;
+	}
+
+	return 0;
+}
+
+static void __exit nfp_netvf_exit(void)
+{
+	pci_unregister_driver(&nfp_netvf_pci_driver);
+	nfp_net_debugfs_destroy();
+}
+
+module_init(nfp_netvf_init);
+module_exit(nfp_netvf_exit);
+
+MODULE_AUTHOR("Netronome Systems <oss-drivers@netronome.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("NFP VF network device driver");