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Message-ID: <1479167687-9904-3-git-send-email-rvatsavayi@caviumnetworks.com>
Date: Mon, 14 Nov 2016 15:54:40 -0800
From: Raghu Vatsavayi <rvatsavayi@...iumnetworks.com>
To: <davem@...emloft.net>
CC: <netdev@...r.kernel.org>,
Raghu Vatsavayi <rvatsavayi@...iumnetworks.com>,
Raghu Vatsavayi <raghu.vatsavayi@...iumnetworks.com>,
Derek Chickles <derek.chickles@...iumnetworks.com>,
Satanand Burla <satananda.burla@...iumnetworks.com>,
Felix Manlunas <felix.manlunas@...iumnetworks.com>
Subject: [PATCH net-next V6 2/9] liquidio CN23XX: sysfs VF config support
Adds sysfs based support for enabling or disabling VFs.
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@...iumnetworks.com>
Signed-off-by: Derek Chickles <derek.chickles@...iumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@...iumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@...iumnetworks.com>
---
drivers/net/ethernet/cavium/liquidio/lio_main.c | 106 +++++++++++++++++++++
.../net/ethernet/cavium/liquidio/octeon_config.h | 3 +
.../net/ethernet/cavium/liquidio/octeon_device.h | 8 ++
3 files changed, 117 insertions(+)
diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c
index 71d01a7..afce659 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c
@@ -180,6 +180,10 @@ struct octeon_device_priv {
unsigned long napi_mask;
};
+#ifdef CONFIG_PCI_IOV
+static int liquidio_enable_sriov(struct pci_dev *dev, int num_vfs);
+#endif
+
static int octeon_device_init(struct octeon_device *);
static int liquidio_stop(struct net_device *netdev);
static void liquidio_remove(struct pci_dev *pdev);
@@ -518,6 +522,9 @@ static int liquidio_resume(struct pci_dev *pdev __attribute__((unused)))
.suspend = liquidio_suspend,
.resume = liquidio_resume,
#endif
+#ifdef CONFIG_PCI_IOV
+ .sriov_configure = liquidio_enable_sriov,
+#endif
};
/**
@@ -1472,6 +1479,10 @@ static void octeon_destroy_resources(struct octeon_device *oct)
continue;
octeon_delete_instr_queue(oct, i);
}
+#ifdef CONFIG_PCI_IOV
+ if (oct->sriov_info.sriov_enabled)
+ pci_disable_sriov(oct->pci_dev);
+#endif
/* fallthrough */
case OCT_DEV_SC_BUFF_POOL_INIT_DONE:
octeon_free_sc_buffer_pool(oct);
@@ -3990,6 +4001,101 @@ static int setup_nic_devices(struct octeon_device *octeon_dev)
return -ENODEV;
}
+#ifdef CONFIG_PCI_IOV
+static int octeon_enable_sriov(struct octeon_device *oct)
+{
+ unsigned int num_vfs_alloced = oct->sriov_info.num_vfs_alloced;
+ struct pci_dev *vfdev;
+ int err;
+ u32 u;
+
+ if (OCTEON_CN23XX_PF(oct) && num_vfs_alloced) {
+ err = pci_enable_sriov(oct->pci_dev,
+ oct->sriov_info.num_vfs_alloced);
+ if (err) {
+ dev_err(&oct->pci_dev->dev,
+ "OCTEON: Failed to enable PCI sriov: %d\n",
+ err);
+ oct->sriov_info.num_vfs_alloced = 0;
+ return err;
+ }
+ oct->sriov_info.sriov_enabled = 1;
+
+ /* init lookup table that maps DPI ring number to VF pci_dev
+ * struct pointer
+ */
+ u = 0;
+ vfdev = pci_get_device(PCI_VENDOR_ID_CAVIUM,
+ OCTEON_CN23XX_VF_VID, NULL);
+ while (vfdev) {
+ if (vfdev->is_virtfn &&
+ (vfdev->physfn == oct->pci_dev)) {
+ oct->sriov_info.dpiring_to_vfpcidev_lut[u] =
+ vfdev;
+ u += oct->sriov_info.rings_per_vf;
+ }
+ vfdev = pci_get_device(PCI_VENDOR_ID_CAVIUM,
+ OCTEON_CN23XX_VF_VID, vfdev);
+ }
+ }
+
+ return num_vfs_alloced;
+}
+
+static int lio_pci_sriov_disable(struct octeon_device *oct)
+{
+ int u;
+
+ if (pci_vfs_assigned(oct->pci_dev)) {
+ dev_err(&oct->pci_dev->dev, "VFs are still assigned to VMs.\n");
+ return -EPERM;
+ }
+
+ pci_disable_sriov(oct->pci_dev);
+
+ u = 0;
+ while (u < MAX_POSSIBLE_VFS) {
+ oct->sriov_info.dpiring_to_vfpcidev_lut[u] = NULL;
+ u += oct->sriov_info.rings_per_vf;
+ }
+
+ oct->sriov_info.num_vfs_alloced = 0;
+ dev_info(&oct->pci_dev->dev, "oct->pf_num:%d disabled VFs\n",
+ oct->pf_num);
+
+ return 0;
+}
+
+static int liquidio_enable_sriov(struct pci_dev *dev, int num_vfs)
+{
+ struct octeon_device *oct = pci_get_drvdata(dev);
+ int ret = 0;
+
+ if ((num_vfs == oct->sriov_info.num_vfs_alloced) &&
+ (oct->sriov_info.sriov_enabled)) {
+ dev_info(&oct->pci_dev->dev, "oct->pf_num:%d already enabled num_vfs:%d\n",
+ oct->pf_num, num_vfs);
+ return 0;
+ }
+
+ if (!num_vfs) {
+ ret = lio_pci_sriov_disable(oct);
+ } else if (num_vfs > oct->sriov_info.max_vfs) {
+ dev_err(&oct->pci_dev->dev,
+ "OCTEON: Max allowed VFs:%d user requested:%d",
+ oct->sriov_info.max_vfs, num_vfs);
+ ret = -EPERM;
+ } else {
+ oct->sriov_info.num_vfs_alloced = num_vfs;
+ ret = octeon_enable_sriov(oct);
+ dev_info(&oct->pci_dev->dev, "oct->pf_num:%d num_vfs:%d\n",
+ oct->pf_num, num_vfs);
+ }
+
+ return ret;
+}
+#endif
+
/**
* \brief initialize the NIC
* @param oct octeon device
diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_config.h b/drivers/net/ethernet/cavium/liquidio/octeon_config.h
index 512bca5..71daf82 100644
--- a/drivers/net/ethernet/cavium/liquidio/octeon_config.h
+++ b/drivers/net/ethernet/cavium/liquidio/octeon_config.h
@@ -472,4 +472,7 @@ struct octeon_config {
#define MAX_POSSIBLE_OCTEON_INSTR_QUEUES CN23XX_MAX_INPUT_QUEUES
#define MAX_POSSIBLE_OCTEON_OUTPUT_QUEUES CN23XX_MAX_OUTPUT_QUEUES
+
+#define MAX_POSSIBLE_VFS 64
+
#endif /* __OCTEON_CONFIG_H__ */
diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_device.h b/drivers/net/ethernet/cavium/liquidio/octeon_device.h
index 751d3b6..cfd12ec 100644
--- a/drivers/net/ethernet/cavium/liquidio/octeon_device.h
+++ b/drivers/net/ethernet/cavium/liquidio/octeon_device.h
@@ -38,6 +38,7 @@
#define OCTEON_CN68XX 0x0091
#define OCTEON_CN66XX 0x0092
#define OCTEON_CN23XX_PF_VID 0x9702
+#define OCTEON_CN23XX_VF_VID 0x9712
/**RevisionId for the chips */
#define OCTEON_CN23XX_REV_1_0 0x00
@@ -331,6 +332,9 @@ struct octeon_sriov_info {
**/
u32 max_vfs;
+ /** Number of VF devices enabled using sysfs. */
+ u32 num_vfs_alloced;
+
/* Actual rings left for PF device */
u32 num_pf_rings;
@@ -340,6 +344,10 @@ struct octeon_sriov_info {
/* total pf rings */
u32 trs;
+ u32 sriov_enabled;
+
+ /*lookup table that maps DPI ring number to VF pci_dev struct pointer*/
+ struct pci_dev *dpiring_to_vfpcidev_lut[MAX_POSSIBLE_VFS];
};
struct octeon_ioq_vector {
--
1.8.3.1
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