[dpdk-dev] [PATCH] enic: fix warnings

[Thomas Monjalon <thomas.monjalon@6wind.com>]

A lot of warnings were not seen because $(WERROR_FLAGS) was not set
in the Makefile. But they appear with toolchains that enforce more checks.

-Wno-deprecated seems useless.
-Wno-strict-aliasing is added to avoid false positives.

This patch cleans up unused variable, unused functions, wrong types,
static declarations, etc. A lot of functions have unused parameters;
it suggests that more clean-up could be needed.

Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
---
 lib/librte_pmd_enic/Makefile         |  3 +-
 lib/librte_pmd_enic/enic.h           |  4 +-
 lib/librte_pmd_enic/enic_ethdev.c    | 20 ++++-----
 lib/librte_pmd_enic/enic_main.c      | 81 +++++++++++-------------------------
 lib/librte_pmd_enic/vnic/vnic_cq.h   |  1 -
 lib/librte_pmd_enic/vnic/vnic_dev.c  | 22 +++-------
 lib/librte_pmd_enic/vnic/vnic_dev.h  |  4 +-
 lib/librte_pmd_enic/vnic/vnic_intr.c |  5 ---
 8 files changed, 46 insertions(+), 94 deletions(-)

diff --git a/lib/librte_pmd_enic/Makefile b/lib/librte_pmd_enic/Makefile
index 948ec96..a2a623f 100644
--- a/lib/librte_pmd_enic/Makefile
+++ b/lib/librte_pmd_enic/Makefile
@@ -39,7 +39,8 @@ LIB = librte_pmd_enic.a
 
 CFLAGS += -I$(RTE_SDK)/lib/librte_pmd_enic/vnic/
 CFLAGS += -I$(RTE_SDK)/lib/librte_pmd_enic/
-CFLAGS += -O3 -Wno-deprecated
+CFLAGS += -O3
+CFLAGS += $(WERROR_FLAGS) -Wno-strict-aliasing
 
 VPATH += $(RTE_SDK)/lib/librte_pmd_enic/src
 
diff --git a/lib/librte_pmd_enic/enic.h b/lib/librte_pmd_enic/enic.h
index f128e64..c43417c 100644
--- a/lib/librte_pmd_enic/enic.h
+++ b/lib/librte_pmd_enic/enic.h
@@ -134,7 +134,7 @@ struct enic {
 	unsigned int intr_count;
 };
 
-static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
+static inline unsigned int enic_cq_rq(__rte_unused struct enic *enic, unsigned int rq)
 {
 	return rq;
 }
@@ -144,7 +144,7 @@ static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
 	return enic->rq_count + wq;
 }
 
-static inline unsigned int enic_msix_err_intr(struct enic *enic)
+static inline unsigned int enic_msix_err_intr(__rte_unused struct enic *enic)
 {
 	return 0;
 }
diff --git a/lib/librte_pmd_enic/enic_ethdev.c b/lib/librte_pmd_enic/enic_ethdev.c
index f582152..9cb6666 100644
--- a/lib/librte_pmd_enic/enic_ethdev.c
+++ b/lib/librte_pmd_enic/enic_ethdev.c
@@ -67,7 +67,7 @@ RTE_PCI_DEV_ID_DECL_ENIC(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF)
 
 static int enicpmd_fdir_remove_perfect_filter(struct rte_eth_dev *eth_dev,
 		struct rte_fdir_filter *fdir_filter,
-		uint16_t soft_id)
+		__rte_unused uint16_t soft_id)
 {
 	struct enic *enic = pmd_priv(eth_dev);
 
@@ -76,7 +76,7 @@ static int enicpmd_fdir_remove_perfect_filter(struct rte_eth_dev *eth_dev,
 }
 
 static int enicpmd_fdir_add_perfect_filter(struct rte_eth_dev *eth_dev,
-	struct rte_fdir_filter *fdir_filter, uint16_t soft_id,
+	struct rte_fdir_filter *fdir_filter, __rte_unused uint16_t soft_id,
 	uint8_t queue, uint8_t drop)
 {
 	struct enic *enic = pmd_priv(eth_dev);
@@ -103,7 +103,7 @@ static void enicpmd_dev_tx_queue_release(void *txq)
 static int enicpmd_dev_setup_intr(struct enic *enic)
 {
 	int ret;
-	int index;
+	unsigned int index;
 
 	ENICPMD_FUNC_TRACE();
 
@@ -134,7 +134,7 @@ static int enicpmd_dev_tx_queue_setup(struct rte_eth_dev *eth_dev,
 	uint16_t queue_idx,
 	uint16_t nb_desc,
 	unsigned int socket_id,
-	const struct rte_eth_txconf *tx_conf)
+	__rte_unused const struct rte_eth_txconf *tx_conf)
 {
 	int ret;
 	struct enic *enic = pmd_priv(eth_dev);
@@ -215,7 +215,7 @@ static int enicpmd_dev_rx_queue_setup(struct rte_eth_dev *eth_dev,
 	uint16_t queue_idx,
 	uint16_t nb_desc,
 	unsigned int socket_id,
-	const struct rte_eth_rxconf *rx_conf,
+	__rte_unused const struct rte_eth_rxconf *rx_conf,
 	struct rte_mempool *mp)
 {
 	int ret;
@@ -334,7 +334,7 @@ static void enicpmd_dev_close(struct rte_eth_dev *eth_dev)
 }
 
 static int enicpmd_dev_link_update(struct rte_eth_dev *eth_dev,
-	int wait_to_complete)
+	__rte_unused int wait_to_complete)
 {
 	struct enic *enic = pmd_priv(eth_dev);
 	int ret;
@@ -428,7 +428,7 @@ static void enicpmd_dev_allmulticast_disable(struct rte_eth_dev *eth_dev)
 
 static void enicpmd_add_mac_addr(struct rte_eth_dev *eth_dev,
 	struct ether_addr *mac_addr,
-	uint32_t index, uint32_t pool)
+	__rte_unused uint32_t index, __rte_unused uint32_t pool)
 {
 	struct enic *enic = pmd_priv(eth_dev);
 
@@ -436,7 +436,7 @@ static void enicpmd_add_mac_addr(struct rte_eth_dev *eth_dev,
 	enic_set_mac_address(enic, mac_addr->addr_bytes);
 }
 
-static void enicpmd_remove_mac_addr(struct rte_eth_dev *eth_dev, uint32_t index)
+static void enicpmd_remove_mac_addr(struct rte_eth_dev *eth_dev, __rte_unused uint32_t index)
 {
 	struct enic *enic = pmd_priv(eth_dev);
 
@@ -457,7 +457,6 @@ static uint16_t enicpmd_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 	struct rte_mbuf *tx_pkt;
 	struct vnic_wq *wq = (struct vnic_wq *)tx_queue;
 	struct enic *enic = vnic_dev_priv(wq->vdev);
-	unsigned char *buf;
 	unsigned short vlan_id;
 	unsigned short ol_flags;
 
@@ -595,7 +594,8 @@ static struct eth_driver rte_enic_pmd = {
  * Invoked once at EAL init time.
  * Register as the [Poll Mode] Driver of Cisco ENIC device.
  */
-int rte_enic_pmd_init(const char *name __rte_unused,
+static int
+rte_enic_pmd_init(const char *name __rte_unused,
 	const char *params __rte_unused)
 {
 	ENICPMD_FUNC_TRACE();
diff --git a/lib/librte_pmd_enic/enic_main.c b/lib/librte_pmd_enic/enic_main.c
index 4bbf1e4..e4f43c5 100644
--- a/lib/librte_pmd_enic/enic_main.c
+++ b/lib/librte_pmd_enic/enic_main.c
@@ -90,32 +90,12 @@ enic_rxmbuf_alloc(struct rte_mempool *mp)
 	return m;
 }
 
-static const struct rte_memzone *ring_dma_zone_reserve(
-	struct rte_eth_dev *dev, const char *ring_name,
-	uint16_t queue_id, uint32_t ring_size, int socket_id)
-{
-	char z_name[RTE_MEMZONE_NAMESIZE];
-	const struct rte_memzone *mz;
-
-	snprintf(z_name, sizeof(z_name), "%s_%s_%d_%d",
-		dev->driver->pci_drv.name, ring_name,
-		dev->data->port_id, queue_id);
-
-	mz = rte_memzone_lookup(z_name);
-	if (mz)
-		return mz;
-
-	return rte_memzone_reserve_aligned((const char *)z_name,
-		(uint64_t) ring_size,
-		socket_id, RTE_MEMZONE_1GB, ENIC_ALIGN);
-}
-
 void enic_set_hdr_split_size(struct enic *enic, u16 split_hdr_size)
 {
 	vnic_set_hdr_split_size(enic->vdev, split_hdr_size);
 }
 
-static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
+static void enic_free_wq_buf(__rte_unused struct vnic_wq *wq, struct vnic_wq_buf *buf)
 {
 	struct rte_mbuf *mbuf = (struct rte_mbuf *)buf->os_buf;
 
@@ -124,13 +104,15 @@ static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 }
 
 static void enic_wq_free_buf(struct vnic_wq *wq,
-	struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
+	__rte_unused struct cq_desc *cq_desc,
+	struct vnic_wq_buf *buf,
+	__rte_unused void *opaque)
 {
 	enic_free_wq_buf(wq, buf);
 }
 
 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
-	u8 type, u16 q_number, u16 completed_index, void *opaque)
+	__rte_unused u8 type, u16 q_number, u16 completed_index, void *opaque)
 {
 	struct enic *enic = vnic_dev_priv(vdev);
 
@@ -178,11 +160,8 @@ int enic_send_pkt(struct enic *enic, struct vnic_wq *wq,
 {
 	struct wq_enet_desc *desc = vnic_wq_next_desc(wq);
 	uint16_t mss = 0;
-	uint16_t header_length = 0;
 	uint8_t cq_entry = eop;
 	uint8_t vlan_tag_insert = 0;
-	unsigned char *buf = (unsigned char *)(tx_pkt->buf_addr) +
-	    RTE_PKTMBUF_HEADROOM;
 	uint64_t bus_addr = (dma_addr_t)
 	    (tx_pkt->buf_physaddr + RTE_PKTMBUF_HEADROOM);
 
@@ -282,10 +261,9 @@ void enic_set_mac_address(struct enic *enic, uint8_t *mac_addr)
 	}
 }
 
-static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
+static void
+enic_free_rq_buf(__rte_unused struct vnic_rq *rq, struct vnic_rq_buf *buf)
 {
-	struct enic *enic = vnic_dev_priv(rq->vdev);
-
 	if (!buf->os_buf)
 		return;
 
@@ -297,8 +275,7 @@ void enic_init_vnic_resources(struct enic *enic)
 {
 	unsigned int error_interrupt_enable = 1;
 	unsigned int error_interrupt_offset = 0;
-	int index = 0;
-	unsigned int cq_index = 0;
+	unsigned int index = 0;
 
 	for (index = 0; index < enic->rq_count; index++) {
 		vnic_rq_init(&enic->rq[index],
@@ -340,11 +317,9 @@ void enic_init_vnic_resources(struct enic *enic)
 static int enic_rq_alloc_buf(struct vnic_rq *rq)
 {
 	struct enic *enic = vnic_dev_priv(rq->vdev);
-	void *buf;
 	dma_addr_t dma_addr;
 	struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
 	uint8_t type = RQ_ENET_TYPE_ONLY_SOP;
-	uint16_t len = ENIC_MAX_MTU + VLAN_ETH_HLEN;
 	u16 split_hdr_size = vnic_get_hdr_split_size(enic->vdev);
 	struct rte_mbuf *mbuf = enic_rxmbuf_alloc(rq->mp);
 	struct rte_mbuf *hdr_mbuf = NULL;
@@ -368,7 +343,6 @@ static int enic_rq_alloc_buf(struct vnic_rq *rq)
 		}
 
 		hdr_mbuf->data_off = RTE_PKTMBUF_HEADROOM;
-		buf = rte_pktmbuf_mtod(hdr_mbuf, void *);
 
 		hdr_mbuf->nb_segs = 2;
 		hdr_mbuf->port = rq->index;
@@ -390,7 +364,6 @@ static int enic_rq_alloc_buf(struct vnic_rq *rq)
 	}
 
 	mbuf->data_off = RTE_PKTMBUF_HEADROOM;
-	buf = rte_pktmbuf_mtod(mbuf, void *);
 	mbuf->next = NULL;
 
 	dma_addr = (dma_addr_t)
@@ -525,7 +498,7 @@ static int enic_rq_indicate_buf(struct vnic_rq *rq,
 }
 
 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
-	u8 type, u16 q_number, u16 completed_index, void *opaque)
+	__rte_unused u8 type, u16 q_number, u16 completed_index, void *opaque)
 {
 	struct enic *enic = vnic_dev_priv(vdev);
 
@@ -557,10 +530,10 @@ int enic_poll(struct vnic_rq *rq, struct rte_mbuf **rx_pkts,
 	return err;
 }
 
-void *enic_alloc_consistent(void *priv, size_t size,
+static void *
+enic_alloc_consistent(__rte_unused void *priv, size_t size,
 	dma_addr_t *dma_handle, u8 *name)
 {
-	struct enic *enic = (struct enic *)priv;
 	void *vaddr;
 	const struct rte_memzone *rz;
 	*dma_handle = 0;
@@ -579,13 +552,17 @@ void *enic_alloc_consistent(void *priv, size_t size,
 	return vaddr;
 }
 
-void enic_free_consistent(struct rte_pci_device *hwdev, size_t size,
-	void *vaddr, dma_addr_t dma_handle)
+static void
+enic_free_consistent(__rte_unused struct rte_pci_device *hwdev,
+	__rte_unused size_t size,
+	__rte_unused void *vaddr,
+	__rte_unused dma_addr_t dma_handle)
 {
 	/* Nothing to be done */
 }
 
-void enic_intr_handler(__rte_unused struct rte_intr_handle *handle,
+static void
+enic_intr_handler(__rte_unused struct rte_intr_handle *handle,
 	void *arg)
 {
 	struct enic *enic = pmd_priv((struct rte_eth_dev *)arg);
@@ -598,10 +575,7 @@ void enic_intr_handler(__rte_unused struct rte_intr_handle *handle,
 
 int enic_enable(struct enic *enic)
 {
-	int index;
-	void *res;
-	char mz_name[RTE_MEMZONE_NAMESIZE];
-	const struct rte_memzone *rmz;
+	unsigned int index;
 	struct rte_eth_dev *eth_dev = enic->rte_dev;
 
 	eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
@@ -869,11 +843,11 @@ static int enic_set_rsskey(struct enic *enic)
 {
 	dma_addr_t rss_key_buf_pa;
 	union vnic_rss_key *rss_key_buf_va = NULL;
-	union vnic_rss_key rss_key = {
-		.key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
-		.key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
-		.key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
-		.key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
+	static union vnic_rss_key rss_key = {
+		.key[0] = {.b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}},
+		.key[1] = {.b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}},
+		.key[2] = {.b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}},
+		.key[3] = {.b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}},
 	};
 	int err;
 	u8 name[NAME_MAX];
@@ -900,7 +874,7 @@ static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
 {
 	dma_addr_t rss_cpu_buf_pa;
 	union vnic_rss_cpu *rss_cpu_buf_va = NULL;
-	unsigned int i;
+	int i;
 	int err;
 	u8 name[NAME_MAX];
 
@@ -1105,7 +1079,6 @@ static void enic_clear_intr_mode(struct enic *enic)
 
 static void enic_dev_deinit(struct enic *enic)
 {
-	unsigned int i;
 	struct rte_eth_dev *eth_dev = enic->rte_dev;
 
 	if (eth_dev->data->mac_addrs)
@@ -1140,7 +1113,6 @@ int enic_set_vnic_res(struct enic *enic)
 
 static int enic_dev_init(struct enic *enic)
 {
-	unsigned int i;
 	int err;
 	struct rte_eth_dev *eth_dev = enic->rte_dev;
 
@@ -1189,10 +1161,7 @@ static int enic_dev_init(struct enic *enic)
 
 int enic_probe(struct enic *enic)
 {
-	const char *bdf = enic->bdf_name;
 	struct rte_pci_device *pdev = enic->pdev;
-	struct rte_eth_dev *eth_dev = enic->rte_dev;
-	unsigned int i;
 	int err = -1;
 
 	dev_info(enic, " Initializing ENIC PMD version %s\n", DRV_VERSION);
diff --git a/lib/librte_pmd_enic/vnic/vnic_cq.h b/lib/librte_pmd_enic/vnic/vnic_cq.h
index 9ed9b1d..0928d72 100644
--- a/lib/librte_pmd_enic/vnic/vnic_cq.h
+++ b/lib/librte_pmd_enic/vnic/vnic_cq.h
@@ -103,7 +103,6 @@ static inline unsigned int vnic_cq_service(struct vnic_cq *cq,
 	u8 type, color;
 	struct rte_mbuf **rx_pkts = opaque;
 	unsigned int ret;
-	unsigned int split_hdr_size = vnic_get_hdr_split_size(cq->vdev);
 
 	cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
 		cq->ring.desc_size * cq->to_clean);
diff --git a/lib/librte_pmd_enic/vnic/vnic_dev.c b/lib/librte_pmd_enic/vnic/vnic_dev.c
index 682c9c9..21d5521 100644
--- a/lib/librte_pmd_enic/vnic/vnic_dev.c
+++ b/lib/librte_pmd_enic/vnic/vnic_dev.c
@@ -267,7 +267,8 @@ void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
 	memset(ring->descs, 0, ring->size);
 }
 
-int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
+int vnic_dev_alloc_desc_ring(__attribute__((unused)) struct vnic_dev *vdev,
+	struct vnic_dev_ring *ring,
 	unsigned int desc_count, unsigned int desc_size, unsigned int socket_id,
 	char *z_name)
 {
@@ -305,7 +306,8 @@ int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
 	return 0;
 }
 
-void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
+void vnic_dev_free_desc_ring(__attribute__((unused))  struct vnic_dev *vdev,
+	struct vnic_dev_ring *ring)
 {
 	if (ring->descs)
 		ring->descs = NULL;
@@ -761,7 +763,7 @@ int vnic_dev_notify_setcmd(struct vnic_dev *vdev,
 
 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
 {
-	void *notify_addr;
+	void *notify_addr = NULL;
 	dma_addr_t notify_pa;
 	char name[NAME_MAX];
 	static u32 instance;
@@ -973,20 +975,6 @@ struct rte_pci_device *vnic_dev_get_pdev(struct vnic_dev *vdev)
 	return vdev->pdev;
 }
 
-static int vnic_dev_cmd_status(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
-	int *status)
-{
-	u64 a0 = cmd, a1 = 0;
-	int wait = 1000;
-	int ret;
-
-	ret = vnic_dev_cmd(vdev, CMD_STATUS, &a0, &a1, wait);
-	if (!ret)
-		*status = (int)a0;
-
-	return ret;
-}
-
 int vnic_dev_set_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
 {
 	u64 a0, a1;
diff --git a/lib/librte_pmd_enic/vnic/vnic_dev.h b/lib/librte_pmd_enic/vnic/vnic_dev.h
index 8cc036b..d1373a5 100644
--- a/lib/librte_pmd_enic/vnic/vnic_dev.h
+++ b/lib/librte_pmd_enic/vnic/vnic_dev.h
@@ -48,14 +48,14 @@
 #ifndef readq
 static inline u64 readq(void __iomem *reg)
 {
-	return ((u64)readl(reg + 0x4UL) << 32) |
+	return ((u64)readl((char *)reg + 0x4UL) << 32) |
 		(u64)readl(reg);
 }
 
 static inline void writeq(u64 val, void __iomem *reg)
 {
 	writel(val & 0xffffffff, reg);
-	writel(val >> 32, reg + 0x4UL);
+	writel(val >> 32, (char *)reg + 0x4UL);
 }
 #endif
 
diff --git a/lib/librte_pmd_enic/vnic/vnic_intr.c b/lib/librte_pmd_enic/vnic/vnic_intr.c
index 9be3744..84368af 100644
--- a/lib/librte_pmd_enic/vnic/vnic_intr.c
+++ b/lib/librte_pmd_enic/vnic/vnic_intr.c
@@ -76,8 +76,3 @@ void vnic_intr_clean(struct vnic_intr *intr)
 {
 	iowrite32(0, &intr->ctrl->int_credits);
 }
-
-void vnic_intr_raise(struct vnic_intr *intr)
-{
-	vnic_dev_raise_intr(intr->vdev, (u16)intr->index);
-}
-- 
2.1.3