e1000: multi-queue defines/modification to data structures

defines/modifies data structures, function prototypes and changes to the
driver rendering it capable of handling <n> tx/rx queues

Signed-off-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Ganesh Venkatesan <ganesh.venkatesan@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 56 insertions, 11 deletions

diff --git a/drivers/net/e1000/e1000.h b/drivers/net/e1000/e1000.h
index 092757bc721f..9b7274b111f3 100644
--- a/drivers/net/e1000/e1000.h
+++ b/drivers/net/e1000/e1000.h
@@ -72,6 +72,10 @@
 #include <linux/mii.h>
 #include <linux/ethtool.h>
 #include <linux/if_vlan.h>
+#ifdef CONFIG_E1000_MQ
+#include <linux/cpu.h>
+#include <linux/smp.h>
+#endif
 
 #define BAR_0           0
 #define BAR_1           1
@@ -168,7 +172,30 @@ struct e1000_buffer {
 struct e1000_ps_page { struct page *ps_page[MAX_PS_BUFFERS]; };
 struct e1000_ps_page_dma { uint64_t ps_page_dma[MAX_PS_BUFFERS]; };
 
-struct e1000_desc_ring {
+struct e1000_tx_ring {
+        /* pointer to the descriptor ring memory */
+        void *desc;
+        /* physical address of the descriptor ring */
+        dma_addr_t dma;
+        /* length of descriptor ring in bytes */
+        unsigned int size;
+        /* number of descriptors in the ring */
+        unsigned int count;
+        /* next descriptor to associate a buffer with */
+        unsigned int next_to_use;
+        /* next descriptor to check for DD status bit */
+        unsigned int next_to_clean;
+        /* array of buffer information structs */
+        struct e1000_buffer *buffer_info;
+
+        struct e1000_buffer previous_buffer_info;
+        spinlock_t tx_lock;
+        uint16_t tdh;
+        uint16_t tdt;
+        uint64_t pkt;
+};
+
+struct e1000_rx_ring {
         /* pointer to the descriptor ring memory */
         void *desc;
         /* physical address of the descriptor ring */
@@ -186,6 +213,10 @@ struct e1000_desc_ring {
         /* arrays of page information for packet split */
         struct e1000_ps_page *ps_page;
         struct e1000_ps_page_dma *ps_page_dma;
+
+        uint16_t rdh;
+        uint16_t rdt;
+        uint64_t pkt;
 };
 
 #define E1000_DESC_UNUSED(R) \
@@ -227,9 +258,10 @@ struct e1000_adapter {
         unsigned long led_status;
 
         /* TX */
-        struct e1000_desc_ring tx_ring;
-        struct e1000_buffer previous_buffer_info;
-        spinlock_t tx_lock;
+        struct e1000_tx_ring *tx_ring;      /* One per active queue */
+#ifdef CONFIG_E1000_MQ
+        struct e1000_tx_ring **cpu_tx_ring; /* per-cpu */
+#endif
         uint32_t txd_cmd;
         uint32_t tx_int_delay;
         uint32_t tx_abs_int_delay;
@@ -246,13 +278,26 @@ struct e1000_adapter {
 
         /* RX */
 #ifdef CONFIG_E1000_NAPI
-        boolean_t (*clean_rx) (struct e1000_adapter *adapter, int *work_done,
-                          int work_to_do);
+        boolean_t (*clean_rx) (struct e1000_adapter *adapter,
+                               struct e1000_rx_ring *rx_ring,
+                               int *work_done, int work_to_do);
 #else
-        boolean_t (*clean_rx) (struct e1000_adapter *adapter);
+        boolean_t (*clean_rx) (struct e1000_adapter *adapter,
+                               struct e1000_rx_ring *rx_ring);
 #endif
-        void (*alloc_rx_buf) (struct e1000_adapter *adapter);
-        struct e1000_desc_ring rx_ring;
+        void (*alloc_rx_buf) (struct e1000_adapter *adapter,
+                              struct e1000_rx_ring *rx_ring);
+        struct e1000_rx_ring *rx_ring;      /* One per active queue */
+#ifdef CONFIG_E1000_NAPI
+        struct net_device *polling_netdev;  /* One per active queue */
+#endif
+#ifdef CONFIG_E1000_MQ
+        struct net_device **cpu_netdev;     /* per-cpu */
+        struct call_async_data_struct rx_sched_call_data;
+        int cpu_for_queue[4];
+#endif
+        int num_queues;
+
         uint64_t hw_csum_err;
         uint64_t hw_csum_good;
         uint32_t rx_int_delay;
@@ -278,8 +323,8 @@ struct e1000_adapter {
         struct e1000_phy_stats phy_stats;
 
         uint32_t test_icr;
-        struct e1000_desc_ring test_tx_ring;
-        struct e1000_desc_ring test_rx_ring;
+        struct e1000_tx_ring test_tx_ring;
+        struct e1000_rx_ring test_rx_ring;
 
 
         int msg_enable;