Merge branch 'ionic-next'

Shannon Nelson says:

====================
ionic: driver updates 27-July-2021

This is a collection of small driver updates for adding a couple of
small features and for a bit of code cleaning.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

9 files changed, 100 insertions, 30 deletions

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
index 505f605fa40b..7e296fa71b36 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
@@ -165,10 +165,10 @@ static int ionic_vf_alloc(struct ionic *ionic, int num_vfs)
 			goto out;
 		}
 
+		ionic->num_vfs++;
 		/* ignore failures from older FW, we just won't get stats */
 		(void)ionic_set_vf_config(ionic, i, IONIC_VF_ATTR_STATSADDR,
 					  (u8 *)&v->stats_pa);
-		ionic->num_vfs++;
 	}
 
 out:
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
index 1dfe962e22e0..9aac647290f7 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -106,6 +106,8 @@ int ionic_dev_setup(struct ionic *ionic)
 	idev->last_fw_hb = 0;
 	idev->fw_hb_ready = true;
 	idev->fw_status_ready = true;
+	idev->fw_generation = IONIC_FW_STS_F_GENERATION &
+			      ioread8(&idev->dev_info_regs->fw_status);
 
 	mod_timer(&ionic->watchdog_timer,
 		  round_jiffies(jiffies + ionic->watchdog_period));
@@ -121,7 +123,9 @@ int ionic_heartbeat_check(struct ionic *ionic)
 {
 	struct ionic_dev *idev = &ionic->idev;
 	unsigned long check_time, last_check_time;
-	bool fw_status_ready, fw_hb_ready;
+	bool fw_status_ready = true;
+	bool fw_hb_ready;
+	u8 fw_generation;
 	u8 fw_status;
 	u32 fw_hb;
 
@@ -140,9 +144,29 @@ do_check_time:
 
 	/* firmware is useful only if the running bit is set and
 	 * fw_status != 0xff (bad PCI read)
+	 * If fw_status is not ready don't bother with the generation.
 	 */
 	fw_status = ioread8(&idev->dev_info_regs->fw_status);
-	fw_status_ready = (fw_status != 0xff) && (fw_status & IONIC_FW_STS_F_RUNNING);
+
+	if (fw_status == 0xff || !(fw_status & IONIC_FW_STS_F_RUNNING)) {
+		fw_status_ready = false;
+	} else {
+		fw_generation = fw_status & IONIC_FW_STS_F_GENERATION;
+		if (idev->fw_generation != fw_generation) {
+			dev_info(ionic->dev, "FW generation 0x%02x -> 0x%02x\n",
+				 idev->fw_generation, fw_generation);
+
+			idev->fw_generation = fw_generation;
+
+			/* If the generation changed, the fw status is not
+			 * ready so we need to trigger a fw-down cycle.  After
+			 * the down, the next watchdog will see the fw is up
+			 * and the generation value stable, so will trigger
+			 * the fw-up activity.
+			 */
+			fw_status_ready = false;
+		}
+	}
 
 	/* is this a transition? */
 	if (fw_status_ready != idev->fw_status_ready) {
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.h b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
index c25cf9b744c5..8311086fb1f4 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
@@ -143,6 +143,7 @@ struct ionic_dev {
 	u32 last_fw_hb;
 	bool fw_hb_ready;
 	bool fw_status_ready;
+	u8 fw_generation;
 
 	u64 __iomem *db_pages;
 	dma_addr_t phy_db_pages;
@@ -160,8 +161,6 @@ struct ionic_dev {
 struct ionic_cq_info {
 	union {
 		void *cq_desc;
-		struct ionic_txq_comp *txcq;
-		struct ionic_rxq_comp *rxcq;
 		struct ionic_admin_comp *admincq;
 		struct ionic_notifyq_event *notifyq;
 	};
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
index 6583be570e45..adc9fdb03e86 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
@@ -32,6 +32,9 @@ static void ionic_get_stats(struct net_device *netdev,
 	struct ionic_lif *lif = netdev_priv(netdev);
 	u32 i;
 
+	if (test_bit(IONIC_LIF_F_FW_RESET, lif->state))
+		return;
+
 	memset(buf, 0, stats->n_stats * sizeof(*buf));
 	for (i = 0; i < ionic_num_stats_grps; i++)
 		ionic_stats_groups[i].get_values(lif, &buf);
@@ -274,6 +277,9 @@ static int ionic_set_link_ksettings(struct net_device *netdev,
 	struct ionic *ionic = lif->ionic;
 	int err = 0;
 
+	if (test_bit(IONIC_LIF_F_FW_RESET, lif->state))
+		return -EBUSY;
+
 	/* set autoneg */
 	if (ks->base.autoneg != idev->port_info->config.an_enable) {
 		mutex_lock(&ionic->dev_cmd_lock);
@@ -320,6 +326,9 @@ static int ionic_set_pauseparam(struct net_device *netdev,
 	u32 requested_pause;
 	int err;
 
+	if (test_bit(IONIC_LIF_F_FW_RESET, lif->state))
+		return -EBUSY;
+
 	if (pause->autoneg)
 		return -EOPNOTSUPP;
 
@@ -372,6 +381,9 @@ static int ionic_set_fecparam(struct net_device *netdev,
 	u8 fec_type;
 	int ret = 0;
 
+	if (test_bit(IONIC_LIF_F_FW_RESET, lif->state))
+		return -EBUSY;
+
 	if (lif->ionic->idev.port_info->config.an_enable) {
 		netdev_err(netdev, "FEC request not allowed while autoneg is enabled\n");
 		return -EINVAL;
@@ -528,6 +540,9 @@ static int ionic_set_ringparam(struct net_device *netdev,
 	struct ionic_queue_params qparam;
 	int err;
 
+	if (test_bit(IONIC_LIF_F_FW_RESET, lif->state))
+		return -EBUSY;
+
 	ionic_init_queue_params(lif, &qparam);
 
 	if (ring->rx_mini_pending || ring->rx_jumbo_pending) {
@@ -597,6 +612,9 @@ static int ionic_set_channels(struct net_device *netdev,
 	int max_cnt;
 	int err;
 
+	if (test_bit(IONIC_LIF_F_FW_RESET, lif->state))
+		return -EBUSY;
+
 	ionic_init_queue_params(lif, &qparam);
 
 	if (ch->rx_count != ch->tx_count) {
@@ -947,6 +965,9 @@ static int ionic_nway_reset(struct net_device *netdev)
 	struct ionic *ionic = lif->ionic;
 	int err = 0;
 
+	if (test_bit(IONIC_LIF_F_FW_RESET, lif->state))
+		return -EBUSY;
+
 	/* flap the link to force auto-negotiation */
 
 	mutex_lock(&ionic->dev_cmd_lock);
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_if.h b/drivers/net/ethernet/pensando/ionic/ionic_if.h
index 0478b48d9895..278610ed7227 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_if.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_if.h
@@ -2936,6 +2936,8 @@ struct ionic_hwstamp_regs {
  * @asic_type:       Asic type
  * @asic_rev:        Asic revision
  * @fw_status:       Firmware status
+ *			bit 0   - 1 = fw running
+ *			bit 4-7 - 4 bit generation number, changes on fw restart
  * @fw_heartbeat:    Firmware heartbeat counter
  * @serial_num:      Serial number
  * @fw_version:      Firmware version
@@ -2949,7 +2951,8 @@ union ionic_dev_info_regs {
 		u8     version;
 		u8     asic_type;
 		u8     asic_rev;
-#define IONIC_FW_STS_F_RUNNING	0x1
+#define IONIC_FW_STS_F_RUNNING		0x01
+#define IONIC_FW_STS_F_GENERATION	0xF0
 		u8     fw_status;
 		u32    fw_heartbeat;
 		char   fw_version[IONIC_DEVINFO_FWVERS_BUFLEN];
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 537c2907b91e..f21f80cee188 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -11,6 +11,7 @@
 #include <linux/interrupt.h>
 #include <linux/pci.h>
 #include <linux/cpumask.h>
+#include <linux/crash_dump.h>
 
 #include "ionic.h"
 #include "ionic_bus.h"
@@ -1606,7 +1607,6 @@ static int ionic_init_nic_features(struct ionic_lif *lif)
 	features = NETIF_F_HW_VLAN_CTAG_TX |
 		   NETIF_F_HW_VLAN_CTAG_RX |
 		   NETIF_F_HW_VLAN_CTAG_FILTER |
-		   NETIF_F_RXHASH |
 		   NETIF_F_SG |
 		   NETIF_F_HW_CSUM |
 		   NETIF_F_RXCSUM |
@@ -1614,6 +1614,9 @@ static int ionic_init_nic_features(struct ionic_lif *lif)
 		   NETIF_F_TSO6 |
 		   NETIF_F_TSO_ECN;
 
+	if (lif->nxqs > 1)
+		features |= NETIF_F_RXHASH;
+
 	err = ionic_set_nic_features(lif, features);
 	if (err)
 		return err;
@@ -2587,22 +2590,26 @@ int ionic_reconfigure_queues(struct ionic_lif *lif,
 	struct ionic_qcq **tx_qcqs = NULL;
 	struct ionic_qcq **rx_qcqs = NULL;
 	unsigned int flags, i;
-	int err = -ENOMEM;
+	int err = 0;
 
 	/* allocate temporary qcq arrays to hold new queue structs */
 	if (qparam->nxqs != lif->nxqs || qparam->ntxq_descs != lif->ntxq_descs) {
 		tx_qcqs = devm_kcalloc(lif->ionic->dev, lif->ionic->ntxqs_per_lif,
 				       sizeof(struct ionic_qcq *), GFP_KERNEL);
-		if (!tx_qcqs)
+		if (!tx_qcqs) {
+			err = -ENOMEM;
 			goto err_out;
+		}
 	}
 	if (qparam->nxqs != lif->nxqs ||
 	    qparam->nrxq_descs != lif->nrxq_descs ||
 	    qparam->rxq_features != lif->rxq_features) {
 		rx_qcqs = devm_kcalloc(lif->ionic->dev, lif->ionic->nrxqs_per_lif,
 				       sizeof(struct ionic_qcq *), GFP_KERNEL);
-		if (!rx_qcqs)
+		if (!rx_qcqs) {
+			err = -ENOMEM;
 			goto err_out;
+		}
 	}
 
 	/* allocate new desc_info and rings, but leave the interrupt setup
@@ -2781,6 +2788,9 @@ err_out:
 		ionic_qcq_free(lif, lif->rxqcqs[i]);
 	}
 
+	if (err)
+		netdev_info(lif->netdev, "%s: failed %d\n", __func__, err);
+
 	return err;
 }
 
@@ -2834,8 +2844,14 @@ int ionic_lif_alloc(struct ionic *ionic)
 
 	lif->ionic = ionic;
 	lif->index = 0;
-	lif->ntxq_descs = IONIC_DEF_TXRX_DESC;
-	lif->nrxq_descs = IONIC_DEF_TXRX_DESC;
+
+	if (is_kdump_kernel()) {
+		lif->ntxq_descs = IONIC_MIN_TXRX_DESC;
+		lif->nrxq_descs = IONIC_MIN_TXRX_DESC;
+	} else {
+		lif->ntxq_descs = IONIC_DEF_TXRX_DESC;
+		lif->nrxq_descs = IONIC_DEF_TXRX_DESC;
+	}
 
 	/* Convert the default coalesce value to actual hw resolution */
 	lif->rx_coalesce_usecs = IONIC_ITR_COAL_USEC_DEFAULT;
@@ -3519,6 +3535,7 @@ int ionic_lif_size(struct ionic *ionic)
 	unsigned int min_intrs;
 	int err;
 
+	/* retrieve basic values from FW */
 	lc = &ident->lif.eth.config;
 	dev_nintrs = le32_to_cpu(ident->dev.nintrs);
 	neqs_per_lif = le32_to_cpu(ident->lif.rdma.eq_qtype.qid_count);
@@ -3526,6 +3543,15 @@ int ionic_lif_size(struct ionic *ionic)
 	ntxqs_per_lif = le32_to_cpu(lc->queue_count[IONIC_QTYPE_TXQ]);
 	nrxqs_per_lif = le32_to_cpu(lc->queue_count[IONIC_QTYPE_RXQ]);
 
+	/* limit values to play nice with kdump */
+	if (is_kdump_kernel()) {
+		dev_nintrs = 2;
+		neqs_per_lif = 0;
+		nnqs_per_lif = 0;
+		ntxqs_per_lif = 1;
+		nrxqs_per_lif = 1;
+	}
+
 	/* reserve last queue id for hardware timestamping */
 	if (lc->features & cpu_to_le64(IONIC_ETH_HW_TIMESTAMP)) {
 		if (ntxqs_per_lif <= 1 || nrxqs_per_lif <= 1) {
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_main.c b/drivers/net/ethernet/pensando/ionic/ionic_main.c
index 61cfe2120817..5f1e5b6e85c3 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_main.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_main.c
@@ -450,6 +450,8 @@ int ionic_identify(struct ionic *ionic)
 	}
 	mutex_unlock(&ionic->dev_cmd_lock);
 
+	dev_info(ionic->dev, "FW: %s\n", idev->dev_info.fw_version);
+
 	if (err) {
 		dev_err(ionic->dev, "Cannot identify ionic: %dn", err);
 		goto err_out;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_phc.c b/drivers/net/ethernet/pensando/ionic/ionic_phc.c
index a87c87e86aef..736ebc5da0f7 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_phc.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_phc.c
@@ -119,8 +119,8 @@ static int ionic_lif_hwstamp_set_ts_config(struct ionic_lif *lif,
 		config->rx_filter = HWTSTAMP_FILTER_ALL;
 	}
 
-	dev_dbg(ionic->dev, "config_rx_filter %d rx_filt %#llx rx_all %d\n",
-		config->rx_filter, rx_filt, rx_all);
+	dev_dbg(ionic->dev, "%s: config_rx_filter %d rx_filt %#llx rx_all %d\n",
+		__func__, config->rx_filter, rx_filt, rx_all);
 
 	if (tx_mode) {
 		err = ionic_lif_create_hwstamp_txq(lif);
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
index 08934888575c..2ba19246d763 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
@@ -32,19 +32,13 @@ static inline struct netdev_queue *q_to_ndq(struct ionic_queue *q)
 	return netdev_get_tx_queue(q->lif->netdev, q->index);
 }
 
-static void ionic_rx_buf_reset(struct ionic_buf_info *buf_info)
-{
-	buf_info->page = NULL;
-	buf_info->page_offset = 0;
-	buf_info->dma_addr = 0;
-}
-
 static int ionic_rx_page_alloc(struct ionic_queue *q,
 			       struct ionic_buf_info *buf_info)
 {
 	struct net_device *netdev = q->lif->netdev;
 	struct ionic_rx_stats *stats;
 	struct device *dev;
+	struct page *page;
 
 	dev = q->dev;
 	stats = q_to_rx_stats(q);
@@ -55,26 +49,27 @@ static int ionic_rx_page_alloc(struct ionic_queue *q,
 		return -EINVAL;
 	}
 
-	buf_info->page = alloc_pages(IONIC_PAGE_GFP_MASK, 0);
-	if (unlikely(!buf_info->page)) {
+	page = alloc_pages(IONIC_PAGE_GFP_MASK, 0);
+	if (unlikely(!page)) {
 		net_err_ratelimited("%s: %s page alloc failed\n",
 				    netdev->name, q->name);
 		stats->alloc_err++;
 		return -ENOMEM;
 	}
-	buf_info->page_offset = 0;
 
-	buf_info->dma_addr = dma_map_page(dev, buf_info->page, buf_info->page_offset,
+	buf_info->dma_addr = dma_map_page(dev, page, 0,
 					  IONIC_PAGE_SIZE, DMA_FROM_DEVICE);
 	if (unlikely(dma_mapping_error(dev, buf_info->dma_addr))) {
-		__free_pages(buf_info->page, 0);
-		ionic_rx_buf_reset(buf_info);
+		__free_pages(page, 0);
 		net_err_ratelimited("%s: %s dma map failed\n",
 				    netdev->name, q->name);
 		stats->dma_map_err++;
 		return -EIO;
 	}
 
+	buf_info->page = page;
+	buf_info->page_offset = 0;
+
 	return 0;
 }
 
@@ -95,7 +90,7 @@ static void ionic_rx_page_free(struct ionic_queue *q,
 
 	dma_unmap_page(dev, buf_info->dma_addr, IONIC_PAGE_SIZE, DMA_FROM_DEVICE);
 	__free_pages(buf_info->page, 0);
-	ionic_rx_buf_reset(buf_info);
+	buf_info->page = NULL;
 }
 
 static bool ionic_rx_buf_recycle(struct ionic_queue *q,
@@ -139,7 +134,7 @@ static struct sk_buff *ionic_rx_frags(struct ionic_queue *q,
 	buf_info = &desc_info->bufs[0];
 	len = le16_to_cpu(comp->len);
 
-	prefetch(buf_info->page);
+	prefetchw(buf_info->page);
 
 	skb = napi_get_frags(&q_to_qcq(q)->napi);
 	if (unlikely(!skb)) {
@@ -170,7 +165,7 @@ static struct sk_buff *ionic_rx_frags(struct ionic_queue *q,
 		if (!ionic_rx_buf_recycle(q, buf_info, frag_len)) {
 			dma_unmap_page(dev, buf_info->dma_addr,
 				       IONIC_PAGE_SIZE, DMA_FROM_DEVICE);
-			ionic_rx_buf_reset(buf_info);
+			buf_info->page = NULL;
 		}
 
 		buf_info++;