Merge branch 'ionic-struct-cleanups'

Shannon Nelson says:

====================
ionic: struct cleanups

This patchset has a few changes for better cacheline use,
to cleanup a page handling API, and to streamline the
Adminq/Notifyq queue handling.  Lastly, we also have a couple
of fixes pointed out by the friendly kernel test robot.

v2: dropped change to irq coalesce default
    fixed Neel's attributions to Co-developed-by
    dropped the unnecessary new call to dma_sync_single_for_cpu()
    added 2 patches from kernel test robot results
====================

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

8 files changed, 91 insertions, 138 deletions

diff --git a/drivers/net/ethernet/pensando/ionic/ionic.h b/drivers/net/ethernet/pensando/ionic/ionic.h
index f699ed19eb4f..084a924431d5 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic.h
@@ -64,9 +64,6 @@ struct ionic_admin_ctx {
 	union ionic_adminq_comp comp;
 };
 
-int ionic_napi(struct napi_struct *napi, int budget, ionic_cq_cb cb,
-	       ionic_cq_done_cb done_cb, void *done_arg);
-
 int ionic_adminq_post_wait(struct ionic_lif *lif, struct ionic_admin_ctx *ctx);
 int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_wait);
 int ionic_set_dma_mask(struct ionic *ionic);
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
index 3645673b4b18..6068f51a11d9 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -467,9 +467,7 @@ int ionic_cq_init(struct ionic_lif *lif, struct ionic_cq *cq,
 		  struct ionic_intr_info *intr,
 		  unsigned int num_descs, size_t desc_size)
 {
-	struct ionic_cq_info *cur;
 	unsigned int ring_size;
-	unsigned int i;
 
 	if (desc_size == 0 || !is_power_of_2(num_descs))
 		return -EINVAL;
@@ -485,19 +483,6 @@ int ionic_cq_init(struct ionic_lif *lif, struct ionic_cq *cq,
 	cq->tail_idx = 0;
 	cq->done_color = 1;
 
-	cur = cq->info;
-
-	for (i = 0; i < num_descs; i++) {
-		if (i + 1 == num_descs) {
-			cur->next = cq->info;
-			cur->last = true;
-		} else {
-			cur->next = cur + 1;
-		}
-		cur->index = i;
-		cur++;
-	}
-
 	return 0;
 }
 
@@ -551,9 +536,7 @@ int ionic_q_init(struct ionic_lif *lif, struct ionic_dev *idev,
 		 unsigned int num_descs, size_t desc_size,
 		 size_t sg_desc_size, unsigned int pid)
 {
-	struct ionic_desc_info *cur;
 	unsigned int ring_size;
-	unsigned int i;
 
 	if (desc_size == 0 || !is_power_of_2(num_descs))
 		return -EINVAL;
@@ -574,18 +557,6 @@ int ionic_q_init(struct ionic_lif *lif, struct ionic_dev *idev,
 
 	snprintf(q->name, sizeof(q->name), "L%d-%s%u", lif->index, name, index);
 
-	cur = q->info;
-
-	for (i = 0; i < num_descs; i++) {
-		if (i + 1 == num_descs)
-			cur->next = q->info;
-		else
-			cur->next = cur + 1;
-		cur->index = i;
-		cur->left = num_descs - i;
-		cur++;
-	}
-
 	return 0;
 }
 
@@ -652,6 +623,7 @@ void ionic_q_service(struct ionic_queue *q, struct ionic_cq_info *cq_info,
 	struct ionic_desc_info *desc_info;
 	ionic_desc_cb cb;
 	void *cb_arg;
+	u16 index;
 
 	/* check for empty queue */
 	if (q->tail_idx == q->head_idx)
@@ -665,6 +637,7 @@ void ionic_q_service(struct ionic_queue *q, struct ionic_cq_info *cq_info,
 
 	do {
 		desc_info = &q->info[q->tail_idx];
+		index = q->tail_idx;
 		q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 
 		cb = desc_info->cb;
@@ -675,5 +648,5 @@ void ionic_q_service(struct ionic_queue *q, struct ionic_cq_info *cq_info,
 
 		if (cb)
 			cb(q, desc_info, cq_info, cb_arg);
-	} while (desc_info->index != stop_index);
+	} while (index != stop_index);
 }
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.h b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
index 9e2ac2b8a082..4a35174e3ff1 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
@@ -156,9 +156,6 @@ struct ionic_cq_info {
 		struct ionic_admin_comp *admincq;
 		struct ionic_notifyq_event *notifyq;
 	};
-	struct ionic_cq_info *next;
-	unsigned int index;
-	bool last;
 };
 
 struct ionic_queue;
@@ -186,9 +183,6 @@ struct ionic_desc_info {
 		struct ionic_txq_sg_desc *txq_sg_desc;
 		struct ionic_rxq_sg_desc *rxq_sgl_desc;
 	};
-	struct ionic_desc_info *next;
-	unsigned int index;
-	unsigned int left;
 	unsigned int npages;
 	struct ionic_page_info pages[IONIC_RX_MAX_SG_ELEMS + 1];
 	ionic_desc_cb cb;
@@ -199,16 +193,17 @@ struct ionic_desc_info {
 
 struct ionic_queue {
 	struct device *dev;
-	u64 dbell_count;
-	u64 drop;
-	u64 stop;
-	u64 wake;
 	struct ionic_lif *lif;
 	struct ionic_desc_info *info;
-	struct ionic_dev *idev;
 	u16 head_idx;
 	u16 tail_idx;
 	unsigned int index;
+	unsigned int num_descs;
+	u64 dbell_count;
+	u64 stop;
+	u64 wake;
+	u64 drop;
+	struct ionic_dev *idev;
 	unsigned int type;
 	unsigned int hw_index;
 	unsigned int hw_type;
@@ -226,7 +221,6 @@ struct ionic_queue {
 	};
 	dma_addr_t base_pa;
 	dma_addr_t sg_base_pa;
-	unsigned int num_descs;
 	unsigned int desc_size;
 	unsigned int sg_desc_size;
 	unsigned int pid;
@@ -246,8 +240,6 @@ struct ionic_intr_info {
 };
 
 struct ionic_cq {
-	void *base;
-	dma_addr_t base_pa;
 	struct ionic_lif *lif;
 	struct ionic_cq_info *info;
 	struct ionic_queue *bound_q;
@@ -255,8 +247,10 @@ struct ionic_cq {
 	u16 tail_idx;
 	bool done_color;
 	unsigned int num_descs;
-	u64 compl_count;
 	unsigned int desc_size;
+	u64 compl_count;
+	void *base;
+	dma_addr_t base_pa;
 };
 
 struct ionic;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
index 00aad7168915..0d14659fbdfd 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
@@ -298,8 +298,8 @@ static void ionic_get_pauseparam(struct net_device *netdev,
 
 	pause_type = lif->ionic->idev.port_info->config.pause_type;
 	if (pause_type) {
-		pause->rx_pause = pause_type & IONIC_PAUSE_F_RX ? 1 : 0;
-		pause->tx_pause = pause_type & IONIC_PAUSE_F_TX ? 1 : 0;
+		pause->rx_pause = (pause_type & IONIC_PAUSE_F_RX) ? 1 : 0;
+		pause->tx_pause = (pause_type & IONIC_PAUSE_F_TX) ? 1 : 0;
 	}
 }
 
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index eeaa73650986..ee683cb142a8 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -800,21 +800,6 @@ static bool ionic_notifyq_service(struct ionic_cq *cq,
 	return true;
 }
 
-static int ionic_notifyq_clean(struct ionic_lif *lif, int budget)
-{
-	struct ionic_dev *idev = &lif->ionic->idev;
-	struct ionic_cq *cq = &lif->notifyqcq->cq;
-	u32 work_done;
-
-	work_done = ionic_cq_service(cq, budget, ionic_notifyq_service,
-				     NULL, NULL);
-	if (work_done)
-		ionic_intr_credits(idev->intr_ctrl, cq->bound_intr->index,
-				   work_done, IONIC_INTR_CRED_RESET_COALESCE);
-
-	return work_done;
-}
-
 static bool ionic_adminq_service(struct ionic_cq *cq,
 				 struct ionic_cq_info *cq_info)
 {
@@ -830,15 +815,36 @@ static bool ionic_adminq_service(struct ionic_cq *cq,
 
 static int ionic_adminq_napi(struct napi_struct *napi, int budget)
 {
+	struct ionic_intr_info *intr = napi_to_cq(napi)->bound_intr;
 	struct ionic_lif *lif = napi_to_cq(napi)->lif;
+	struct ionic_dev *idev = &lif->ionic->idev;
+	unsigned int flags = 0;
 	int n_work = 0;
 	int a_work = 0;
+	int work_done;
+
+	if (lif->notifyqcq && lif->notifyqcq->flags & IONIC_QCQ_F_INITED)
+		n_work = ionic_cq_service(&lif->notifyqcq->cq, budget,
+					  ionic_notifyq_service, NULL, NULL);
 
-	if (likely(lif->notifyqcq && lif->notifyqcq->flags & IONIC_QCQ_F_INITED))
-		n_work = ionic_notifyq_clean(lif, budget);
-	a_work = ionic_napi(napi, budget, ionic_adminq_service, NULL, NULL);
+	if (lif->adminqcq && lif->adminqcq->flags & IONIC_QCQ_F_INITED)
+		a_work = ionic_cq_service(&lif->adminqcq->cq, budget,
+					  ionic_adminq_service, NULL, NULL);
+
+	work_done = max(n_work, a_work);
+	if (work_done < budget && napi_complete_done(napi, work_done)) {
+		flags |= IONIC_INTR_CRED_UNMASK;
+		DEBUG_STATS_INTR_REARM(intr);
+	}
 
-	return max(n_work, a_work);
+	if (work_done || flags) {
+		flags |= IONIC_INTR_CRED_RESET_COALESCE;
+		ionic_intr_credits(idev->intr_ctrl,
+				   intr->index,
+				   n_work + a_work, flags);
+	}
+
+	return work_done;
 }
 
 void ionic_get_stats64(struct net_device *netdev,
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
index e1e6ff1a0918..11ea9e0c6a4a 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
@@ -16,32 +16,32 @@
 #define IONIC_TX_BUDGET_DEFAULT		256
 
 struct ionic_tx_stats {
-	u64 dma_map_err;
 	u64 pkts;
 	u64 bytes;
-	u64 clean;
-	u64 linearize;
 	u64 csum_none;
 	u64 csum;
-	u64 crc32_csum;
 	u64 tso;
 	u64 tso_bytes;
 	u64 frags;
 	u64 vlan_inserted;
+	u64 clean;
+	u64 linearize;
+	u64 crc32_csum;
 	u64 sg_cntr[IONIC_MAX_NUM_SG_CNTR];
+	u64 dma_map_err;
 };
 
 struct ionic_rx_stats {
-	u64 dma_map_err;
-	u64 alloc_err;
 	u64 pkts;
 	u64 bytes;
 	u64 csum_none;
 	u64 csum_complete;
-	u64 csum_error;
 	u64 buffers_posted;
 	u64 dropped;
 	u64 vlan_stripped;
+	u64 csum_error;
+	u64 dma_map_err;
+	u64 alloc_err;
 };
 
 #define IONIC_QCQ_F_INITED		BIT(0)
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_main.c b/drivers/net/ethernet/pensando/ionic/ionic_main.c
index 2b72a51be1d0..cfb90bf605fe 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_main.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_main.c
@@ -305,32 +305,6 @@ int ionic_adminq_post_wait(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
 	return ionic_adminq_check_err(lif, ctx, (remaining == 0));
 }
 
-int ionic_napi(struct napi_struct *napi, int budget, ionic_cq_cb cb,
-	       ionic_cq_done_cb done_cb, void *done_arg)
-{
-	struct ionic_qcq *qcq = napi_to_qcq(napi);
-	struct ionic_cq *cq = &qcq->cq;
-	u32 work_done, flags = 0;
-
-	work_done = ionic_cq_service(cq, budget, cb, done_cb, done_arg);
-
-	if (work_done < budget && napi_complete_done(napi, work_done)) {
-		flags |= IONIC_INTR_CRED_UNMASK;
-		DEBUG_STATS_INTR_REARM(cq->bound_intr);
-	}
-
-	if (work_done || flags) {
-		flags |= IONIC_INTR_CRED_RESET_COALESCE;
-		ionic_intr_credits(cq->lif->ionic->idev.intr_ctrl,
-				   cq->bound_intr->index,
-				   work_done, flags);
-	}
-
-	DEBUG_STATS_NAPI_POLL(qcq, work_done);
-
-	return work_done;
-}
-
 static void ionic_dev_cmd_clean(struct ionic *ionic)
 {
 	union ionic_dev_cmd_regs *regs = ionic->idev.dev_cmd_regs;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
index c3291decd4c3..b5f8d8250aff 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
@@ -238,10 +238,10 @@ static bool ionic_rx_service(struct ionic_cq *cq, struct ionic_cq_info *cq_info)
 	if (q->tail_idx == q->head_idx)
 		return false;
 
-	desc_info = &q->info[q->tail_idx];
-	if (desc_info->index != le16_to_cpu(comp->comp_index))
+	if (q->tail_idx != le16_to_cpu(comp->comp_index))
 		return false;
 
+	desc_info = &q->info[q->tail_idx];
 	q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 
 	/* clean the related q entry, only one per qc completion */
@@ -266,40 +266,49 @@ void ionic_rx_flush(struct ionic_cq *cq)
 				   work_done, IONIC_INTR_CRED_RESET_COALESCE);
 }
 
-static struct page *ionic_rx_page_alloc(struct ionic_queue *q,
-					dma_addr_t *dma_addr)
+static int ionic_rx_page_alloc(struct ionic_queue *q,
+			       struct ionic_page_info *page_info)
 {
 	struct ionic_lif *lif = q->lif;
 	struct ionic_rx_stats *stats;
 	struct net_device *netdev;
 	struct device *dev;
-	struct page *page;
 
 	netdev = lif->netdev;
 	dev = lif->ionic->dev;
 	stats = q_to_rx_stats(q);
-	page = alloc_page(GFP_ATOMIC);
-	if (unlikely(!page)) {
-		net_err_ratelimited("%s: Page alloc failed on %s!\n",
+
+	if (unlikely(!page_info)) {
+		net_err_ratelimited("%s: %s invalid page_info in alloc\n",
+				    netdev->name, q->name);
+		return -EINVAL;
+	}
+
+	page_info->page = dev_alloc_page();
+	if (unlikely(!page_info->page)) {
+		net_err_ratelimited("%s: %s page alloc failed\n",
 				    netdev->name, q->name);
 		stats->alloc_err++;
-		return NULL;
+		return -ENOMEM;
 	}
 
-	*dma_addr = dma_map_page(dev, page, 0, PAGE_SIZE, DMA_FROM_DEVICE);
-	if (unlikely(dma_mapping_error(dev, *dma_addr))) {
-		__free_page(page);
-		net_err_ratelimited("%s: DMA single map failed on %s!\n",
+	page_info->dma_addr = dma_map_page(dev, page_info->page, 0, PAGE_SIZE,
+					   DMA_FROM_DEVICE);
+	if (unlikely(dma_mapping_error(dev, page_info->dma_addr))) {
+		put_page(page_info->page);
+		page_info->dma_addr = 0;
+		page_info->page = NULL;
+		net_err_ratelimited("%s: %s dma map failed\n",
 				    netdev->name, q->name);
 		stats->dma_map_err++;
-		return NULL;
+		return -EIO;
 	}
 
-	return page;
+	return 0;
 }
 
-static void ionic_rx_page_free(struct ionic_queue *q, struct page *page,
-			       dma_addr_t dma_addr)
+static void ionic_rx_page_free(struct ionic_queue *q,
+			       struct ionic_page_info *page_info)
 {
 	struct ionic_lif *lif = q->lif;
 	struct net_device *netdev;
@@ -308,15 +317,23 @@ static void ionic_rx_page_free(struct ionic_queue *q, struct page *page,
 	netdev = lif->netdev;
 	dev = lif->ionic->dev;
 
-	if (unlikely(!page)) {
-		net_err_ratelimited("%s: Trying to free unallocated buffer on %s!\n",
+	if (unlikely(!page_info)) {
+		net_err_ratelimited("%s: %s invalid page_info in free\n",
+				    netdev->name, q->name);
+		return;
+	}
+
+	if (unlikely(!page_info->page)) {
+		net_err_ratelimited("%s: %s invalid page in free\n",
 				    netdev->name, q->name);
 		return;
 	}
 
-	dma_unmap_page(dev, dma_addr, PAGE_SIZE, DMA_FROM_DEVICE);
+	dma_unmap_page(dev, page_info->dma_addr, PAGE_SIZE, DMA_FROM_DEVICE);
 
-	__free_page(page);
+	put_page(page_info->page);
+	page_info->dma_addr = 0;
+	page_info->page = NULL;
 }
 
 void ionic_rx_fill(struct ionic_queue *q)
@@ -352,8 +369,7 @@ void ionic_rx_fill(struct ionic_queue *q)
 		desc->opcode = (nfrags > 1) ? IONIC_RXQ_DESC_OPCODE_SG :
 					      IONIC_RXQ_DESC_OPCODE_SIMPLE;
 		desc_info->npages = nfrags;
-		page_info->page = ionic_rx_page_alloc(q, &page_info->dma_addr);
-		if (unlikely(!page_info->page)) {
+		if (unlikely(ionic_rx_page_alloc(q, page_info))) {
 			desc->addr = 0;
 			desc->len = 0;
 			return;
@@ -370,8 +386,7 @@ void ionic_rx_fill(struct ionic_queue *q)
 				continue;
 
 			sg_elem = &sg_desc->elems[j];
-			page_info->page = ionic_rx_page_alloc(q, &page_info->dma_addr);
-			if (unlikely(!page_info->page)) {
+			if (unlikely(ionic_rx_page_alloc(q, page_info))) {
 				sg_elem->addr = 0;
 				sg_elem->len = 0;
 				return;
@@ -409,14 +424,8 @@ void ionic_rx_empty(struct ionic_queue *q)
 		desc->addr = 0;
 		desc->len = 0;
 
-		for (i = 0; i < desc_info->npages; i++) {
-			if (likely(desc_info->pages[i].page)) {
-				ionic_rx_page_free(q, desc_info->pages[i].page,
-						   desc_info->pages[i].dma_addr);
-				desc_info->pages[i].page = NULL;
-				desc_info->pages[i].dma_addr = 0;
-			}
-		}
+		for (i = 0; i < desc_info->npages; i++)
+			ionic_rx_page_free(q, &desc_info->pages[i]);
 
 		desc_info->cb_arg = NULL;
 		idx = (idx + 1) & (q->num_descs - 1);
@@ -626,6 +635,7 @@ static bool ionic_tx_service(struct ionic_cq *cq, struct ionic_cq_info *cq_info)
 	struct ionic_txq_comp *comp = cq_info->cq_desc;
 	struct ionic_queue *q = cq->bound_q;
 	struct ionic_desc_info *desc_info;
+	u16 index;
 
 	if (!color_match(comp->color, cq->done_color))
 		return false;
@@ -635,11 +645,12 @@ static bool ionic_tx_service(struct ionic_cq *cq, struct ionic_cq_info *cq_info)
 	 */
 	do {
 		desc_info = &q->info[q->tail_idx];
+		index = q->tail_idx;
 		q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 		ionic_tx_clean(q, desc_info, cq_info, desc_info->cb_arg);
 		desc_info->cb = NULL;
 		desc_info->cb_arg = NULL;
-	} while (desc_info->index != le16_to_cpu(comp->comp_index));
+	} while (index != le16_to_cpu(comp->comp_index));
 
 	return true;
 }
@@ -659,7 +670,6 @@ void ionic_tx_flush(struct ionic_cq *cq)
 void ionic_tx_empty(struct ionic_queue *q)
 {
 	struct ionic_desc_info *desc_info;
-	int done = 0;
 
 	/* walk the not completed tx entries, if any */
 	while (q->head_idx != q->tail_idx) {
@@ -668,7 +678,6 @@ void ionic_tx_empty(struct ionic_queue *q)
 		ionic_tx_clean(q, desc_info, NULL, desc_info->cb_arg);
 		desc_info->cb = NULL;
 		desc_info->cb_arg = NULL;
-		done++;
 	}
 }