From: Shannon Nelson <snelson@pensando.io>
Date: Wed, 10 Mar 2021 11:26:28 -0800
Subject: ionic: optimize fastpath struct usage
Patch-mainline: v5.13-rc1
Git-commit: f37bc3462e80d2dac9f0b2868720782a94dfb523
References: jsc#SLE-16649
Clean up a couple of struct uses to make for better fast path
access.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/pensando/ionic/ionic_dev.c | 4 +-
drivers/net/ethernet/pensando/ionic/ionic_dev.h | 7 ++--
drivers/net/ethernet/pensando/ionic/ionic_lif.c | 3 +-
drivers/net/ethernet/pensando/ionic/ionic_lif.h | 22 ++++++--------
drivers/net/ethernet/pensando/ionic/ionic_main.c | 4 --
drivers/net/ethernet/pensando/ionic/ionic_txrx.c | 34 ++++++++++-------------
6 files changed, 35 insertions(+), 39 deletions(-)
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -585,9 +585,9 @@ void ionic_q_sg_map(struct ionic_queue *
void ionic_q_post(struct ionic_queue *q, bool ring_doorbell, ionic_desc_cb cb,
void *cb_arg)
{
- struct device *dev = q->lif->ionic->dev;
struct ionic_desc_info *desc_info;
struct ionic_lif *lif = q->lif;
+ struct device *dev = q->dev;
desc_info = &q->info[q->head_idx];
desc_info->cb = cb;
@@ -629,7 +629,7 @@ void ionic_q_service(struct ionic_queue
/* stop index must be for a descriptor that is not yet completed */
if (unlikely(!ionic_q_is_posted(q, stop_index)))
- dev_err(q->lif->ionic->dev,
+ dev_err(q->dev,
"ionic stop is not posted %s stop %u tail %u head %u\n",
q->name, stop_index, q->tail_idx, q->head_idx);
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
@@ -203,10 +203,12 @@ struct ionic_queue {
struct device *dev;
struct ionic_lif *lif;
struct ionic_desc_info *info;
+ u64 dbval;
u16 head_idx;
u16 tail_idx;
unsigned int index;
unsigned int num_descs;
+ unsigned int max_sg_elems;
u64 dbell_count;
u64 stop;
u64 wake;
@@ -215,7 +217,6 @@ struct ionic_queue {
unsigned int type;
unsigned int hw_index;
unsigned int hw_type;
- u64 dbval;
union {
void *base;
struct ionic_txq_desc *txq;
@@ -233,7 +234,7 @@ struct ionic_queue {
unsigned int sg_desc_size;
unsigned int pid;
char name[IONIC_QUEUE_NAME_MAX_SZ];
-};
+} ____cacheline_aligned_in_smp;
#define IONIC_INTR_INDEX_NOT_ASSIGNED -1
#define IONIC_INTR_NAME_MAX_SZ 32
@@ -260,7 +261,7 @@ struct ionic_cq {
u64 compl_count;
void *base;
dma_addr_t base_pa;
-};
+} ____cacheline_aligned_in_smp;
struct ionic;
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -494,6 +494,7 @@ static int ionic_qcq_alloc(struct ionic_
goto err_out;
}
+ new->q.dev = dev;
new->flags = flags;
new->q.info = devm_kcalloc(dev, num_descs, sizeof(*new->q.info),
@@ -505,6 +506,7 @@ static int ionic_qcq_alloc(struct ionic_
}
new->q.type = type;
+ new->q.max_sg_elems = lif->qtype_info[type].max_sg_elems;
err = ionic_q_init(lif, idev, &new->q, index, name, num_descs,
desc_size, sg_desc_size, pid);
@@ -2429,7 +2431,6 @@ int ionic_lif_alloc(struct ionic *ionic)
lif->index = 0;
lif->ntxq_descs = IONIC_DEF_TXRX_DESC;
lif->nrxq_descs = IONIC_DEF_TXRX_DESC;
- lif->tx_budget = IONIC_TX_BUDGET_DEFAULT;
/* Convert the default coalesce value to actual hw resolution */
lif->rx_coalesce_usecs = IONIC_ITR_COAL_USEC_DEFAULT;
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
@@ -153,16 +153,11 @@ struct ionic_qtype_info {
#define IONIC_LIF_NAME_MAX_SZ 32
struct ionic_lif {
- char name[IONIC_LIF_NAME_MAX_SZ];
- struct list_head list;
struct net_device *netdev;
DECLARE_BITMAP(state, IONIC_LIF_F_STATE_SIZE);
struct ionic *ionic;
- bool registered;
unsigned int index;
unsigned int hw_index;
- unsigned int kern_pid;
- u64 __iomem *kern_dbpage;
struct mutex queue_lock; /* lock for queue structures */
spinlock_t adminq_lock; /* lock for AdminQ operations */
struct ionic_qcq *adminqcq;
@@ -171,20 +166,25 @@ struct ionic_lif {
struct ionic_tx_stats *txqstats;
struct ionic_qcq **rxqcqs;
struct ionic_rx_stats *rxqstats;
+ struct ionic_deferred deferred;
+ struct work_struct tx_timeout_work;
u64 last_eid;
+ unsigned int kern_pid;
+ u64 __iomem *kern_dbpage;
unsigned int neqs;
unsigned int nxqs;
unsigned int ntxq_descs;
unsigned int nrxq_descs;
u32 rx_copybreak;
- u32 tx_budget;
unsigned int rx_mode;
u64 hw_features;
+ bool registered;
bool mc_overflow;
- unsigned int nmcast;
bool uc_overflow;
u16 lif_type;
+ unsigned int nmcast;
unsigned int nucast;
+ char name[IONIC_LIF_NAME_MAX_SZ];
union ionic_lif_identity *identity;
struct ionic_lif_info *info;
@@ -199,16 +199,14 @@ struct ionic_lif {
u32 rss_ind_tbl_sz;
struct ionic_rx_filters rx_filters;
- struct ionic_deferred deferred;
- unsigned long *dbid_inuse;
- unsigned int dbid_count;
- struct dentry *dentry;
u32 rx_coalesce_usecs; /* what the user asked for */
u32 rx_coalesce_hw; /* what the hw is using */
u32 tx_coalesce_usecs; /* what the user asked for */
u32 tx_coalesce_hw; /* what the hw is using */
+ unsigned long *dbid_inuse;
+ unsigned int dbid_count;
- struct work_struct tx_timeout_work;
+ struct dentry *dentry;
};
struct ionic_queue_params {
--- a/drivers/net/ethernet/pensando/ionic/ionic_main.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_main.c
@@ -234,17 +234,15 @@ static void ionic_adminq_cb(struct ionic
{
struct ionic_admin_ctx *ctx = cb_arg;
struct ionic_admin_comp *comp;
- struct device *dev;
if (!ctx)
return;
comp = cq_info->cq_desc;
- dev = &q->lif->netdev->dev;
memcpy(&ctx->comp, comp, sizeof(*comp));
- dev_dbg(dev, "comp admin queue command:\n");
+ dev_dbg(q->dev, "comp admin queue command:\n");
dynamic_hex_dump("comp ", DUMP_PREFIX_OFFSET, 16, 1,
&ctx->comp, sizeof(ctx->comp), true);
--- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
@@ -82,7 +82,7 @@ static int ionic_rx_page_alloc(struct io
struct device *dev;
netdev = lif->netdev;
- dev = lif->ionic->dev;
+ dev = q->dev;
stats = q_to_rx_stats(q);
if (unlikely(!buf_info)) {
@@ -118,7 +118,7 @@ static void ionic_rx_page_free(struct io
struct ionic_buf_info *buf_info)
{
struct net_device *netdev = q->lif->netdev;
- struct device *dev = q->lif->ionic->dev;
+ struct device *dev = q->dev;
if (unlikely(!buf_info)) {
net_err_ratelimited("%s: %s invalid buf_info in free\n",
@@ -162,8 +162,8 @@ static struct sk_buff *ionic_rx_frags(st
struct ionic_cq_info *cq_info)
{
struct ionic_rxq_comp *comp = cq_info->cq_desc;
- struct device *dev = q->lif->ionic->dev;
struct ionic_buf_info *buf_info;
+ struct device *dev = q->dev;
struct sk_buff *skb;
unsigned int i;
u16 frag_len;
@@ -218,8 +218,8 @@ static struct sk_buff *ionic_rx_copybrea
struct ionic_cq_info *cq_info)
{
struct ionic_rxq_comp *comp = cq_info->cq_desc;
- struct device *dev = q->lif->ionic->dev;
struct ionic_buf_info *buf_info;
+ struct device *dev = q->dev;
struct sk_buff *skb;
u16 len;
@@ -362,7 +362,6 @@ void ionic_rx_fill(struct ionic_queue *q
struct ionic_rxq_sg_elem *sg_elem;
struct ionic_buf_info *buf_info;
struct ionic_rxq_desc *desc;
- unsigned int max_sg_elems;
unsigned int remain_len;
unsigned int frag_len;
unsigned int nfrags;
@@ -370,7 +369,6 @@ void ionic_rx_fill(struct ionic_queue *q
unsigned int len;
len = netdev->mtu + ETH_HLEN + VLAN_HLEN;
- max_sg_elems = q->lif->qtype_info[IONIC_QTYPE_RXQ].max_sg_elems;
for (i = ionic_q_space_avail(q); i; i--) {
nfrags = 0;
@@ -397,7 +395,7 @@ void ionic_rx_fill(struct ionic_queue *q
/* fill sg descriptors - buf[1..n] */
sg_desc = desc_info->sg_desc;
- for (j = 0; remain_len > 0 && j < max_sg_elems; j++) {
+ for (j = 0; remain_len > 0 && j < q->max_sg_elems; j++) {
sg_elem = &sg_desc->elems[j];
if (!buf_info->page) { /* alloc a new sg buffer? */
if (unlikely(ionic_rx_page_alloc(q, buf_info))) {
@@ -416,7 +414,7 @@ void ionic_rx_fill(struct ionic_queue *q
}
/* clear end sg element as a sentinel */
- if (j < max_sg_elems) {
+ if (j < q->max_sg_elems) {
sg_elem = &sg_desc->elems[j];
memset(sg_elem, 0, sizeof(*sg_elem));
}
@@ -569,7 +567,7 @@ int ionic_txrx_napi(struct napi_struct *
idev = &lif->ionic->idev;
txcq = &lif->txqcqs[qi]->cq;
- tx_work_done = ionic_cq_service(txcq, lif->tx_budget,
+ tx_work_done = ionic_cq_service(txcq, IONIC_TX_BUDGET_DEFAULT,
ionic_tx_service, NULL, NULL);
rx_work_done = ionic_cq_service(rxcq, budget,
@@ -599,7 +597,7 @@ static dma_addr_t ionic_tx_map_single(st
void *data, size_t len)
{
struct ionic_tx_stats *stats = q_to_tx_stats(q);
- struct device *dev = q->lif->ionic->dev;
+ struct device *dev = q->dev;
dma_addr_t dma_addr;
dma_addr = dma_map_single(dev, data, len, DMA_TO_DEVICE);
@@ -617,7 +615,7 @@ static dma_addr_t ionic_tx_map_frag(stru
size_t offset, size_t len)
{
struct ionic_tx_stats *stats = q_to_tx_stats(q);
- struct device *dev = q->lif->ionic->dev;
+ struct device *dev = q->dev;
dma_addr_t dma_addr;
dma_addr = skb_frag_dma_map(dev, frag, offset, len, DMA_TO_DEVICE);
@@ -638,7 +636,7 @@ static void ionic_tx_clean(struct ionic_
struct ionic_txq_sg_elem *elem = sg_desc->elems;
struct ionic_tx_stats *stats = q_to_tx_stats(q);
struct ionic_txq_desc *desc = desc_info->desc;
- struct device *dev = q->lif->ionic->dev;
+ struct device *dev = q->dev;
u8 opcode, flags, nsge;
u16 queue_index;
unsigned int i;
@@ -820,8 +818,8 @@ static int ionic_tx_tso(struct ionic_que
{
struct ionic_tx_stats *stats = q_to_tx_stats(q);
struct ionic_desc_info *rewind_desc_info;
- struct device *dev = q->lif->ionic->dev;
struct ionic_txq_sg_elem *elem;
+ struct device *dev = q->dev;
struct ionic_txq_desc *desc;
unsigned int frag_left = 0;
unsigned int offset = 0;
@@ -992,7 +990,7 @@ static int ionic_tx_calc_csum(struct ion
{
struct ionic_txq_desc *desc = q->info[q->head_idx].txq_desc;
struct ionic_tx_stats *stats = q_to_tx_stats(q);
- struct device *dev = q->lif->ionic->dev;
+ struct device *dev = q->dev;
dma_addr_t dma_addr;
bool has_vlan;
u8 flags = 0;
@@ -1032,7 +1030,7 @@ static int ionic_tx_calc_no_csum(struct
{
struct ionic_txq_desc *desc = q->info[q->head_idx].txq_desc;
struct ionic_tx_stats *stats = q_to_tx_stats(q);
- struct device *dev = q->lif->ionic->dev;
+ struct device *dev = q->dev;
dma_addr_t dma_addr;
bool has_vlan;
u8 flags = 0;
@@ -1069,7 +1067,7 @@ static int ionic_tx_skb_frags(struct ion
unsigned int len_left = skb->len - skb_headlen(skb);
struct ionic_txq_sg_elem *elem = sg_desc->elems;
struct ionic_tx_stats *stats = q_to_tx_stats(q);
- struct device *dev = q->lif->ionic->dev;
+ struct device *dev = q->dev;
dma_addr_t dma_addr;
skb_frag_t *frag;
u16 len;
@@ -1118,7 +1116,6 @@ static int ionic_tx(struct ionic_queue *
static int ionic_tx_descs_needed(struct ionic_queue *q, struct sk_buff *skb)
{
- int sg_elems = q->lif->qtype_info[IONIC_QTYPE_TXQ].max_sg_elems;
struct ionic_tx_stats *stats = q_to_tx_stats(q);
int ndescs;
int err;
@@ -1129,7 +1126,8 @@ static int ionic_tx_descs_needed(struct
else
ndescs = 1;
- if (skb_shinfo(skb)->nr_frags <= sg_elems)
+ /* If non-TSO, just need 1 desc and nr_frags sg elems */
+ if (skb_shinfo(skb)->nr_frags <= q->max_sg_elems)
return ndescs;
/* Too many frags, so linearize */