#define FM10K_MAX_JUMBO_FRAME_SIZE 15358 /* Maximum supported size 15K */
+#define MAX_QUEUES FM10K_MAX_QUEUES_PF
+
+#define FM10K_MIN_RXD 128
+#define FM10K_MAX_RXD 4096
+#define FM10K_DEFAULT_RXD 256
+
+#define FM10K_MIN_TXD 128
+#define FM10K_MAX_TXD 4096
+#define FM10K_DEFAULT_TXD 256
+#define FM10K_DEFAULT_TX_WORK 256
+
+#define FM10K_RXBUFFER_256 256
+#define FM10K_RXBUFFER_16384 16384
+#define FM10K_RX_HDR_LEN FM10K_RXBUFFER_256
+#if PAGE_SIZE <= FM10K_RXBUFFER_16384
+#define FM10K_RX_BUFSZ (PAGE_SIZE / 2)
+#else
+#define FM10K_RX_BUFSZ FM10K_RXBUFFER_16384
+#endif
+
+/* How many Rx Buffers do we bundle into one write to the hardware ? */
+#define FM10K_RX_BUFFER_WRITE 16 /* Must be power of 2 */
+
+enum fm10k_ring_state_t {
+ __FM10K_TX_DETECT_HANG,
+ __FM10K_HANG_CHECK_ARMED,
+};
+
+#define check_for_tx_hang(ring) \
+ test_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
+#define set_check_for_tx_hang(ring) \
+ set_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
+#define clear_check_for_tx_hang(ring) \
+ clear_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
+
+struct fm10k_tx_buffer {
+ struct fm10k_tx_desc *next_to_watch;
+ struct sk_buff *skb;
+ unsigned int bytecount;
+ u16 gso_segs;
+ u16 tx_flags;
+ DEFINE_DMA_UNMAP_ADDR(dma);
+ DEFINE_DMA_UNMAP_LEN(len);
+};
+
+struct fm10k_rx_buffer {
+ dma_addr_t dma;
+ struct page *page;
+ u32 page_offset;
+};
+
+struct fm10k_queue_stats {
+ u64 packets;
+ u64 bytes;
+};
+
+struct fm10k_tx_queue_stats {
+ u64 restart_queue;
+ u64 csum_err;
+ u64 tx_busy;
+ u64 tx_done_old;
+};
+
+struct fm10k_rx_queue_stats {
+ u64 alloc_failed;
+ u64 csum_err;
+ u64 errors;
+};
+
+struct fm10k_ring {
+ struct fm10k_q_vector *q_vector;/* backpointer to host q_vector */
+ struct net_device *netdev; /* netdev ring belongs to */
+ struct device *dev; /* device for DMA mapping */
+ void *desc; /* descriptor ring memory */
+ union {
+ struct fm10k_tx_buffer *tx_buffer;
+ struct fm10k_rx_buffer *rx_buffer;
+ };
+ u32 __iomem *tail;
+ unsigned long state;
+ dma_addr_t dma; /* phys. address of descriptor ring */
+ unsigned int size; /* length in bytes */
+
+ u8 queue_index; /* needed for queue management */
+ u8 reg_idx; /* holds the special value that gets
+ * the hardware register offset
+ * associated with this ring, which is
+ * different for DCB and RSS modes
+ */
+ u8 qos_pc; /* priority class of queue */
+ u16 vid; /* default vlan ID of queue */
+ u16 count; /* amount of descriptors */
+
+ u16 next_to_alloc;
+ u16 next_to_use;
+ u16 next_to_clean;
+
+ struct fm10k_queue_stats stats;
+ struct u64_stats_sync syncp;
+ union {
+ /* Tx */
+ struct fm10k_tx_queue_stats tx_stats;
+ /* Rx */
+ struct {
+ struct fm10k_rx_queue_stats rx_stats;
+ struct sk_buff *skb;
+ };
+ };
+} ____cacheline_internodealigned_in_smp;
+
struct fm10k_ring_container {
+ struct fm10k_ring *ring; /* pointer to linked list of rings */
unsigned int total_bytes; /* total bytes processed this int */
unsigned int total_packets; /* total packets processed this int */
u16 work_limit; /* total work allowed per interrupt */
#define FM10K_ITR_ENABLE (FM10K_ITR_AUTOMASK | FM10K_ITR_MASK_CLEAR)
+static inline struct netdev_queue *txring_txq(const struct fm10k_ring *ring)
+{
+ return &ring->netdev->_tx[ring->queue_index];
+}
+
+/* iterator for handling rings in ring container */
+#define fm10k_for_each_ring(pos, head) \
+ for (pos = &(head).ring[(head).count]; (--pos) >= (head).ring;)
+
#define MAX_Q_VECTORS 256
#define MIN_Q_VECTORS 1
enum fm10k_non_q_vectors {
char name[IFNAMSIZ + 9];
struct rcu_head rcu; /* to avoid race with update stats on free */
+
+ /* for dynamic allocation of rings associated with this q_vector */
+ struct fm10k_ring ring[0] ____cacheline_internodealigned_in_smp;
};
enum fm10k_ring_f_enum {
int num_rx_queues;
u16 rx_itr;
+ /* TX */
+ struct fm10k_ring *tx_ring[MAX_QUEUES] ____cacheline_aligned_in_smp;
+
u64 rx_overrun_pf;
u64 rx_overrun_vf;
+ /* RX */
+ struct fm10k_ring *rx_ring[MAX_QUEUES];
+
/* Queueing vectors */
struct fm10k_q_vector *q_vector[MAX_Q_VECTORS];
struct msix_entry *msix_entries;
return !test_and_set_bit(__FM10K_MBX_LOCK, &interface->state);
}
+/* fm10k_test_staterr - test bits in Rx descriptor status and error fields */
+static inline __le32 fm10k_test_staterr(union fm10k_rx_desc *rx_desc,
+ const u32 stat_err_bits)
+{
+ return rx_desc->d.staterr & cpu_to_le32(stat_err_bits);
+}
+
+/* fm10k_desc_unused - calculate if we have unused descriptors */
+static inline u16 fm10k_desc_unused(struct fm10k_ring *ring)
+{
+ s16 unused = ring->next_to_clean - ring->next_to_use - 1;
+
+ return likely(unused < 0) ? unused + ring->count : unused;
+}
+
+#define FM10K_TX_DESC(R, i) \
+ (&(((struct fm10k_tx_desc *)((R)->desc))[i]))
+#define FM10K_RX_DESC(R, i) \
+ (&(((union fm10k_rx_desc *)((R)->desc))[i]))
+
+#define FM10K_MAX_TXD_PWR 14
+#define FM10K_MAX_DATA_PER_TXD (1 << FM10K_MAX_TXD_PWR)
+
+/* Tx Descriptors needed, worst case */
+#define TXD_USE_COUNT(S) DIV_ROUND_UP((S), FM10K_MAX_DATA_PER_TXD)
+#define DESC_NEEDED (MAX_SKB_FRAGS + 4)
+
+enum fm10k_tx_flags {
+ /* Tx offload flags */
+ FM10K_TX_FLAGS_CSUM = 0x01,
+};
+
+/* This structure is stored as little endian values as that is the native
+ * format of the Rx descriptor. The ordering of these fields is reversed
+ * from the actual ftag header to allow for a single bswap to take care
+ * of placing all of the values in network order
+ */
+union fm10k_ftag_info {
+ __le64 ftag;
+ struct {
+ /* dglort and sglort combined into a single 32bit desc read */
+ __le32 glort;
+ /* upper 16 bits of vlan are reserved 0 for swpri_type_user */
+ __le32 vlan;
+ } d;
+ struct {
+ __le16 dglort;
+ __le16 sglort;
+ __le16 vlan;
+ __le16 swpri_type_user;
+ } w;
+};
+
+struct fm10k_cb {
+ union fm10k_ftag_info fi;
+};
+
+#define FM10K_CB(skb) ((struct fm10k_cb *)(skb)->cb)
+
/* main */
extern char fm10k_driver_name[];
extern const char fm10k_driver_version[];
unsigned int rxr_count, unsigned int rxr_idx)
{
struct fm10k_q_vector *q_vector;
+ struct fm10k_ring *ring;
int ring_count, size;
ring_count = txr_count + rxr_count;
- size = sizeof(struct fm10k_q_vector);
+ size = sizeof(struct fm10k_q_vector) +
+ (sizeof(struct fm10k_ring) * ring_count);
/* allocate q_vector and rings */
q_vector = kzalloc(size, GFP_KERNEL);
q_vector->interface = interface;
q_vector->v_idx = v_idx;
+ /* initialize pointer to rings */
+ ring = q_vector->ring;
+
/* save Tx ring container info */
+ q_vector->tx.ring = ring;
+ q_vector->tx.work_limit = FM10K_DEFAULT_TX_WORK;
q_vector->tx.itr = interface->tx_itr;
q_vector->tx.count = txr_count;
+ while (txr_count) {
+ /* assign generic ring traits */
+ ring->dev = &interface->pdev->dev;
+ ring->netdev = interface->netdev;
+
+ /* configure backlink on ring */
+ ring->q_vector = q_vector;
+
+ /* apply Tx specific ring traits */
+ ring->count = interface->tx_ring_count;
+ ring->queue_index = txr_idx;
+
+ /* assign ring to interface */
+ interface->tx_ring[txr_idx] = ring;
+
+ /* update count and index */
+ txr_count--;
+ txr_idx += v_count;
+
+ /* push pointer to next ring */
+ ring++;
+ }
+
/* save Rx ring container info */
+ q_vector->rx.ring = ring;
q_vector->rx.itr = interface->rx_itr;
q_vector->rx.count = rxr_count;
+ while (rxr_count) {
+ /* assign generic ring traits */
+ ring->dev = &interface->pdev->dev;
+ ring->netdev = interface->netdev;
+
+ /* configure backlink on ring */
+ ring->q_vector = q_vector;
+
+ /* apply Rx specific ring traits */
+ ring->count = interface->rx_ring_count;
+ ring->queue_index = rxr_idx;
+
+ /* assign ring to interface */
+ interface->rx_ring[rxr_idx] = ring;
+
+ /* update count and index */
+ rxr_count--;
+ rxr_idx += v_count;
+
+ /* push pointer to next ring */
+ ring++;
+ }
+
return 0;
}
static void fm10k_free_q_vector(struct fm10k_intfc *interface, int v_idx)
{
struct fm10k_q_vector *q_vector = interface->q_vector[v_idx];
+ struct fm10k_ring *ring;
+
+ fm10k_for_each_ring(ring, q_vector->tx)
+ interface->tx_ring[ring->queue_index] = NULL;
+
+ fm10k_for_each_ring(ring, q_vector->rx)
+ interface->rx_ring[ring->queue_index] = NULL;
interface->q_vector[v_idx] = NULL;
netif_napi_del(&q_vector->napi);
/* setup GLORT assignment for this port */
fm10k_request_glort_range(interface);
+ /* Notify the stack of the actual queue counts */
+
+ err = netif_set_real_num_rx_queues(netdev,
+ interface->num_rx_queues);
+ if (err)
+ goto err_set_queues;
+
fm10k_up(interface);
return 0;
+err_set_queues:
+ fm10k_qv_free_irq(interface);
err_req_irq:
return err;
}
__dev_mc_unsync(netdev, NULL);
}
+/**
+ * fm10k_get_stats64 - Get System Network Statistics
+ * @netdev: network interface device structure
+ * @stats: storage space for 64bit statistics
+ *
+ * Returns 64bit statistics, for use in the ndo_get_stats64 callback. This
+ * function replaces fm10k_get_stats for kernels which support it.
+ */
+static struct rtnl_link_stats64 *fm10k_get_stats64(struct net_device *netdev,
+ struct rtnl_link_stats64 *stats)
+{
+ struct fm10k_intfc *interface = netdev_priv(netdev);
+ struct fm10k_ring *ring;
+ unsigned int start, i;
+ u64 bytes, packets;
+
+ rcu_read_lock();
+
+ for (i = 0; i < interface->num_rx_queues; i++) {
+ ring = ACCESS_ONCE(interface->rx_ring[i]);
+
+ if (!ring)
+ continue;
+
+ do {
+ start = u64_stats_fetch_begin_irq(&ring->syncp);
+ packets = ring->stats.packets;
+ bytes = ring->stats.bytes;
+ } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
+
+ stats->rx_packets += packets;
+ stats->rx_bytes += bytes;
+ }
+
+ for (i = 0; i < interface->num_tx_queues; i++) {
+ ring = ACCESS_ONCE(interface->rx_ring[i]);
+
+ if (!ring)
+ continue;
+
+ do {
+ start = u64_stats_fetch_begin_irq(&ring->syncp);
+ packets = ring->stats.packets;
+ bytes = ring->stats.bytes;
+ } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
+
+ stats->tx_packets += packets;
+ stats->tx_bytes += bytes;
+ }
+
+ rcu_read_unlock();
+
+ /* following stats updated by fm10k_service_task() */
+ stats->rx_missed_errors = netdev->stats.rx_missed_errors;
+
+ return stats;
+}
+
static const struct net_device_ops fm10k_netdev_ops = {
.ndo_open = fm10k_open,
.ndo_stop = fm10k_close,
.ndo_vlan_rx_add_vid = fm10k_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = fm10k_vlan_rx_kill_vid,
.ndo_set_rx_mode = fm10k_set_rx_mode,
+ .ndo_get_stats64 = fm10k_get_stats64,
};
#define DEFAULT_DEBUG_LEVEL_SHIFT 3
struct fm10k_intfc *interface;
struct net_device *dev;
- dev = alloc_etherdev(sizeof(struct fm10k_intfc));
+ dev = alloc_etherdev_mq(sizeof(struct fm10k_intfc), MAX_QUEUES);
if (!dev)
return NULL;
projects / cascardo / linux.git / commitdiff