net/netvsc: fix vmbus device reference in multi-process

The vmbus device is allocated via "calloc" before the EAL memory is
initialized. The secondary process can't reference the vmbus device as
it is not mapped correctly in the shared memory region.

Replace all references to the vmbus device (and its contents) with the
pointers/contents set by the primary process.

Fixes: 4e9c73e96e ("net/netvsc: add Hyper-V network device")
Cc: stable@dpdk.org

Signed-off-by: Long Li <longli@microsoft.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>

drivers/bus/vmbus/private.h

@@ -74,6 +74,8 @@ struct vmbus_channel {
 	uint16_t relid;
 	uint16_t subchannel_id;
 	uint8_t monitor_id;
+
+	struct vmbus_mon_page *monitor_page;
 };
 
 #define VMBUS_MAX_CHANNELS	64

drivers/bus/vmbus/vmbus_channel.c

@@ -27,7 +27,7 @@ vmbus_sync_set_bit(volatile uint32_t *addr, uint32_t mask)
 }
 
 static inline void
-vmbus_set_monitor(const struct rte_vmbus_device *dev, uint32_t monitor_id)
+vmbus_set_monitor(const struct vmbus_channel *channel, uint32_t monitor_id)
 {
 	uint32_t *monitor_addr, monitor_mask;
 	unsigned int trigger_index;
@@ -35,15 +35,14 @@ vmbus_set_monitor(const struct rte_vmbus_device *dev, uint32_t monitor_id)
 	trigger_index = monitor_id / HV_MON_TRIG_LEN;
 	monitor_mask = 1u << (monitor_id % HV_MON_TRIG_LEN);
 
-	monitor_addr = &dev->monitor_page->trigs[trigger_index].pending;
+	monitor_addr = &channel->monitor_page->trigs[trigger_index].pending;
 	vmbus_sync_set_bit(monitor_addr, monitor_mask);
 }
 
 static void
-vmbus_set_event(const struct rte_vmbus_device *dev,
-		const struct vmbus_channel *chan)
+vmbus_set_event(const struct vmbus_channel *chan)
 {
-	vmbus_set_monitor(dev, chan->monitor_id);
+	vmbus_set_monitor(chan, chan->monitor_id);
 }
 
 /*
@@ -81,7 +80,6 @@ rte_vmbus_set_latency(const struct rte_vmbus_device *dev,
 void
 rte_vmbus_chan_signal_tx(const struct vmbus_channel *chan)
 {
-	const struct rte_vmbus_device *dev = chan->device;
 	const struct vmbus_br *tbr = &chan->txbr;
 
 	/* Make sure all updates are done before signaling host */
@@ -91,7 +89,7 @@ rte_vmbus_chan_signal_tx(const struct vmbus_channel *chan)
 	if (tbr->vbr->imask)
 		return;
 
-	vmbus_set_event(dev, chan);
+	vmbus_set_event(chan);
 }
 
 
@@ -218,7 +216,7 @@ void rte_vmbus_chan_signal_read(struct vmbus_channel *chan, uint32_t bytes_read)
 	if (write_sz <= pending_sz)
 		return;
 
-	vmbus_set_event(chan->device, chan);
+	vmbus_set_event(chan);
 }
 
 int rte_vmbus_chan_recv(struct vmbus_channel *chan, void *data, uint32_t *len,
@@ -325,6 +323,7 @@ int vmbus_chan_create(const struct rte_vmbus_device *device,
 	chan->subchannel_id = subid;
 	chan->relid = relid;
 	chan->monitor_id = monitor_id;
+	chan->monitor_page = device->monitor_page;
 	*new_chan = chan;
 
 	err = vmbus_uio_map_rings(chan);

drivers/net/netvsc/hn_ethdev.c

@@ -1169,8 +1169,8 @@ eth_hn_dev_init(struct rte_eth_dev *eth_dev)
 	}
 
 	hv->vmbus = vmbus;
-	hv->rxbuf_res = &vmbus->resource[HV_RECV_BUF_MAP];
-	hv->chim_res  = &vmbus->resource[HV_SEND_BUF_MAP];
+	hv->rxbuf_res = vmbus->resource[HV_RECV_BUF_MAP];
+	hv->chim_res  = vmbus->resource[HV_SEND_BUF_MAP];
 	hv->port_id = eth_dev->data->port_id;
 	hv->latency = HN_CHAN_LATENCY_NS;
 	hv->rx_copybreak = HN_RXCOPY_THRESHOLD;

drivers/net/netvsc/hn_nvs.c

@@ -193,11 +193,11 @@ hn_nvs_conn_rxbuf(struct hn_data *hv)
 	 * Connect RXBUF to NVS.
 	 */
 	conn.type = NVS_TYPE_RXBUF_CONN;
-	conn.gpadl = hv->rxbuf_res->phys_addr;
+	conn.gpadl = hv->rxbuf_res.phys_addr;
 	conn.sig = NVS_RXBUF_SIG;
 	PMD_DRV_LOG(DEBUG, "connect rxbuff va=%p gpad=%#" PRIx64,
-		    hv->rxbuf_res->addr,
-		    hv->rxbuf_res->phys_addr);
+		    hv->rxbuf_res.addr,
+		    hv->rxbuf_res.phys_addr);
 
 	error = hn_nvs_execute(hv, &conn, sizeof(conn),
 			       &resp, sizeof(resp),
@@ -308,17 +308,17 @@ hn_nvs_conn_chim(struct hn_data *hv)
 	struct hn_nvs_chim_conn chim;
 	struct hn_nvs_chim_connresp resp;
 	uint32_t sectsz;
-	unsigned long len = hv->chim_res->len;
+	unsigned long len = hv->chim_res.len;
 	int error;
 
 	/* Connect chimney sending buffer to NVS */
 	memset(&chim, 0, sizeof(chim));
 	chim.type = NVS_TYPE_CHIM_CONN;
-	chim.gpadl = hv->chim_res->phys_addr;
+	chim.gpadl = hv->chim_res.phys_addr;
 	chim.sig = NVS_CHIM_SIG;
 	PMD_DRV_LOG(DEBUG, "connect send buf va=%p gpad=%#" PRIx64,
-		    hv->chim_res->addr,
-		    hv->chim_res->phys_addr);
+		    hv->chim_res.addr,
+		    hv->chim_res.phys_addr);
 
 	error = hn_nvs_execute(hv, &chim, sizeof(chim),
 			       &resp, sizeof(resp),

drivers/net/netvsc/hn_rxtx.c

@@ -580,7 +580,7 @@ static void hn_rxpkt(struct hn_rx_queue *rxq, struct hn_rx_bufinfo *rxb,
 		 * Use refcount to handle multiple packets in same
 		 * receive buffer section.
 		 */
-		rxbuf = hv->rxbuf_res->addr;
+		rxbuf = hv->rxbuf_res.addr;
 		iova = rte_mem_virt2iova(rxbuf) + RTE_PTR_DIFF(data, rxbuf);
 		shinfo = &rxb->shinfo;
 
@@ -763,8 +763,8 @@ hn_nvs_handle_rxbuf(struct rte_eth_dev *dev,
 {
 	const struct vmbus_chanpkt_rxbuf *pkt;
 	const struct hn_nvs_hdr *nvs_hdr = buf;
-	uint32_t rxbuf_sz = hv->rxbuf_res->len;
-	char *rxbuf = hv->rxbuf_res->addr;
+	uint32_t rxbuf_sz = hv->rxbuf_res.len;
+	char *rxbuf = hv->rxbuf_res.addr;
 	unsigned int i, hlen, count;
 	struct hn_rx_bufinfo *rxb;
 
@@ -1264,7 +1264,7 @@ hn_try_txagg(struct hn_data *hv, struct hn_tx_queue *txq,
 	if (txd->chim_index == NVS_CHIM_IDX_INVALID)
 		return NULL;
 
-	chim = (uint8_t *)hv->chim_res->addr
+	chim = (uint8_t *)hv->chim_res.addr
 			+ txd->chim_index * hv->chim_szmax;
 
 	txq->agg_txd = txd;

drivers/net/netvsc/hn_var.h

@@ -147,7 +147,7 @@ struct hn_data {
 	uint32_t	link_status;
 	uint32_t	link_speed;
 
-	struct rte_mem_resource *rxbuf_res;	/* UIO resource for Rx */
+	struct rte_mem_resource rxbuf_res;	/* UIO resource for Rx */
 	uint32_t	rxbuf_section_cnt;	/* # of Rx sections */
 	uint32_t	rx_copybreak;
 	uint32_t	rx_extmbuf_enable;
@@ -156,7 +156,7 @@ struct hn_data {
 	uint64_t	rss_offloads;
 
 	rte_spinlock_t	chim_lock;
-	struct rte_mem_resource *chim_res;	/* UIO resource for Tx */
+	struct rte_mem_resource chim_res;	/* UIO resource for Tx */
 	struct rte_bitmap *chim_bmap;		/* Send buffer map */
 	void		*chim_bmem;
 	uint32_t	tx_copybreak;