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e1000: multi-queue defines/modification to data structures
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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>
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Mallikarjuna R Chilakala authored and Jeff Garzik committed Oct 4, 2005
1 parent 868d530 commit 581d708
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Showing 4 changed files with 564 additions and 243 deletions.
67 changes: 56 additions & 11 deletions drivers/net/e1000/e1000.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand Down Expand Up @@ -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 */
Expand All @@ -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) \
Expand Down Expand Up @@ -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;
Expand All @@ -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;
Expand All @@ -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;
Expand Down
75 changes: 51 additions & 24 deletions drivers/net/e1000/e1000_ethtool.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -39,10 +39,10 @@ extern int e1000_up(struct e1000_adapter *adapter);
extern void e1000_down(struct e1000_adapter *adapter);
extern void e1000_reset(struct e1000_adapter *adapter);
extern int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
extern int e1000_setup_rx_resources(struct e1000_adapter *adapter);
extern int e1000_setup_tx_resources(struct e1000_adapter *adapter);
extern void e1000_free_rx_resources(struct e1000_adapter *adapter);
extern void e1000_free_tx_resources(struct e1000_adapter *adapter);
extern int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
extern int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
extern void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
extern void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
extern void e1000_update_stats(struct e1000_adapter *adapter);

struct e1000_stats {
Expand Down Expand Up @@ -576,8 +576,8 @@ e1000_get_ringparam(struct net_device *netdev,
{
struct e1000_adapter *adapter = netdev_priv(netdev);
e1000_mac_type mac_type = adapter->hw.mac_type;
struct e1000_desc_ring *txdr = &adapter->tx_ring;
struct e1000_desc_ring *rxdr = &adapter->rx_ring;
struct e1000_tx_ring *txdr = adapter->tx_ring;
struct e1000_rx_ring *rxdr = adapter->rx_ring;

ring->rx_max_pending = (mac_type < e1000_82544) ? E1000_MAX_RXD :
E1000_MAX_82544_RXD;
Expand All @@ -597,20 +597,40 @@ e1000_set_ringparam(struct net_device *netdev,
{
struct e1000_adapter *adapter = netdev_priv(netdev);
e1000_mac_type mac_type = adapter->hw.mac_type;
struct e1000_desc_ring *txdr = &adapter->tx_ring;
struct e1000_desc_ring *rxdr = &adapter->rx_ring;
struct e1000_desc_ring tx_old, tx_new, rx_old, rx_new;
int err;
struct e1000_tx_ring *txdr, *tx_old, *tx_new;
struct e1000_rx_ring *rxdr, *rx_old, *rx_new;
int i, err, tx_ring_size, rx_ring_size;

tx_ring_size = sizeof(struct e1000_tx_ring) * adapter->num_queues;
rx_ring_size = sizeof(struct e1000_rx_ring) * adapter->num_queues;

if (netif_running(adapter->netdev))
e1000_down(adapter);

tx_old = adapter->tx_ring;
rx_old = adapter->rx_ring;

adapter->tx_ring = kmalloc(tx_ring_size, GFP_KERNEL);
if (!adapter->tx_ring) {
err = -ENOMEM;
goto err_setup_rx;
}
memset(adapter->tx_ring, 0, tx_ring_size);

adapter->rx_ring = kmalloc(rx_ring_size, GFP_KERNEL);
if (!adapter->rx_ring) {
kfree(adapter->tx_ring);
err = -ENOMEM;
goto err_setup_rx;
}
memset(adapter->rx_ring, 0, rx_ring_size);

txdr = adapter->tx_ring;
rxdr = adapter->rx_ring;

if((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
return -EINVAL;

if(netif_running(adapter->netdev))
e1000_down(adapter);

rxdr->count = max(ring->rx_pending,(uint32_t)E1000_MIN_RXD);
rxdr->count = min(rxdr->count,(uint32_t)(mac_type < e1000_82544 ?
E1000_MAX_RXD : E1000_MAX_82544_RXD));
Expand All @@ -621,11 +641,16 @@ e1000_set_ringparam(struct net_device *netdev,
E1000_MAX_TXD : E1000_MAX_82544_TXD));
E1000_ROUNDUP(txdr->count, REQ_TX_DESCRIPTOR_MULTIPLE);

for (i = 0; i < adapter->num_queues; i++) {
txdr[i].count = txdr->count;
rxdr[i].count = rxdr->count;
}

if(netif_running(adapter->netdev)) {
/* Try to get new resources before deleting old */
if((err = e1000_setup_rx_resources(adapter)))
if ((err = e1000_setup_all_rx_resources(adapter)))
goto err_setup_rx;
if((err = e1000_setup_tx_resources(adapter)))
if ((err = e1000_setup_all_tx_resources(adapter)))
goto err_setup_tx;

/* save the new, restore the old in order to free it,
Expand All @@ -635,8 +660,10 @@ e1000_set_ringparam(struct net_device *netdev,
tx_new = adapter->tx_ring;
adapter->rx_ring = rx_old;
adapter->tx_ring = tx_old;
e1000_free_rx_resources(adapter);
e1000_free_tx_resources(adapter);
e1000_free_all_rx_resources(adapter);
e1000_free_all_tx_resources(adapter);
kfree(tx_old);
kfree(rx_old);
adapter->rx_ring = rx_new;
adapter->tx_ring = tx_new;
if((err = e1000_up(adapter)))
Expand All @@ -645,7 +672,7 @@ e1000_set_ringparam(struct net_device *netdev,

return 0;
err_setup_tx:
e1000_free_rx_resources(adapter);
e1000_free_all_rx_resources(adapter);
err_setup_rx:
adapter->rx_ring = rx_old;
adapter->tx_ring = tx_old;
Expand Down Expand Up @@ -903,8 +930,8 @@ e1000_intr_test(struct e1000_adapter *adapter, uint64_t *data)
static void
e1000_free_desc_rings(struct e1000_adapter *adapter)
{
struct e1000_desc_ring *txdr = &adapter->test_tx_ring;
struct e1000_desc_ring *rxdr = &adapter->test_rx_ring;
struct e1000_tx_ring *txdr = &adapter->test_tx_ring;
struct e1000_rx_ring *rxdr = &adapter->test_rx_ring;
struct pci_dev *pdev = adapter->pdev;
int i;

Expand Down Expand Up @@ -946,8 +973,8 @@ e1000_free_desc_rings(struct e1000_adapter *adapter)
static int
e1000_setup_desc_rings(struct e1000_adapter *adapter)
{
struct e1000_desc_ring *txdr = &adapter->test_tx_ring;
struct e1000_desc_ring *rxdr = &adapter->test_rx_ring;
struct e1000_tx_ring *txdr = &adapter->test_tx_ring;
struct e1000_rx_ring *rxdr = &adapter->test_rx_ring;
struct pci_dev *pdev = adapter->pdev;
uint32_t rctl;
int size, i, ret_val;
Expand Down Expand Up @@ -1347,8 +1374,8 @@ e1000_check_lbtest_frame(struct sk_buff *skb, unsigned int frame_size)
static int
e1000_run_loopback_test(struct e1000_adapter *adapter)
{
struct e1000_desc_ring *txdr = &adapter->test_tx_ring;
struct e1000_desc_ring *rxdr = &adapter->test_rx_ring;
struct e1000_tx_ring *txdr = &adapter->test_tx_ring;
struct e1000_rx_ring *rxdr = &adapter->test_rx_ring;
struct pci_dev *pdev = adapter->pdev;
int i, j, k, l, lc, good_cnt, ret_val=0;
unsigned long time;
Expand Down
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