forked from Minki/linux
Merge branch 'r8152-RX-improve'
Hayes says: ==================== v2: For patch #2, replace list_for_each_safe with list_for_each_entry_safe. Remove unlikely in WARN_ON. Adjust the coding style. For patch #4, replace list_for_each_safe with list_for_each_entry_safe. Remove "else" after "continue". For patch #5. replace sysfs with ethtool to modify rx_copybreak and rx_pending. v1: The different chips use different rx buffer size. Use skb_add_rx_frag() to reduce memory copy for RX. ==================== Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
This commit is contained in:
Jakub Kicinski
commit
b753c5a7f9
@ -22,10 +22,11 @@
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#include <linux/mdio.h>
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#include <linux/usb/cdc.h>
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#include <linux/suspend.h>
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#include <linux/atomic.h>
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#include <linux/acpi.h>
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/* Information for net-next */
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#define NETNEXT_VERSION "09"
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#define NETNEXT_VERSION "10"
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/* Information for net */
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#define NET_VERSION "10"
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@ -583,6 +584,9 @@ enum rtl_register_content {
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#define TX_ALIGN 4
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#define RX_ALIGN 8
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#define RTL8152_RX_MAX_PENDING 4096
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#define RTL8152_RXFG_HEADSZ 256
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#define INTR_LINK 0x0004
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#define RTL8152_REQT_READ 0xc0
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@ -694,11 +698,11 @@ struct tx_desc {
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struct r8152;
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struct rx_agg {
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struct list_head list;
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struct list_head list, info_list;
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struct urb *urb;
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struct r8152 *context;
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struct page *page;
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void *buffer;
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void *head;
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};
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struct tx_agg {
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@ -719,7 +723,7 @@ struct r8152 {
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struct net_device *netdev;
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struct urb *intr_urb;
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struct tx_agg tx_info[RTL8152_MAX_TX];
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struct rx_agg rx_info[RTL8152_MAX_RX];
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struct list_head rx_info, rx_used;
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struct list_head rx_done, tx_free;
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struct sk_buff_head tx_queue, rx_queue;
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spinlock_t rx_lock, tx_lock;
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@ -744,11 +748,17 @@ struct r8152 {
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void (*autosuspend_en)(struct r8152 *tp, bool enable);
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} rtl_ops;
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atomic_t rx_count;
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int intr_interval;
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u32 saved_wolopts;
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u32 msg_enable;
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u32 tx_qlen;
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u32 coalesce;
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u32 rx_buf_sz;
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u32 rx_copybreak;
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u32 rx_pending;
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u16 ocp_base;
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u16 speed;
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u8 *intr_buff;
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@ -1467,18 +1477,72 @@ static inline void *tx_agg_align(void *data)
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return (void *)ALIGN((uintptr_t)data, TX_ALIGN);
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}
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static void free_rx_agg(struct r8152 *tp, struct rx_agg *agg)
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{
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list_del(&agg->info_list);
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usb_free_urb(agg->urb);
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put_page(agg->page);
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kfree(agg);
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atomic_dec(&tp->rx_count);
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}
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static struct rx_agg *alloc_rx_agg(struct r8152 *tp, gfp_t mflags)
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{
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struct net_device *netdev = tp->netdev;
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int node = netdev->dev.parent ? dev_to_node(netdev->dev.parent) : -1;
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unsigned int order = get_order(tp->rx_buf_sz);
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struct rx_agg *rx_agg;
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unsigned long flags;
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rx_agg = kmalloc_node(sizeof(*rx_agg), mflags, node);
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if (!rx_agg)
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return NULL;
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rx_agg->page = alloc_pages(mflags | __GFP_COMP, order);
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if (!rx_agg->page)
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goto free_rx;
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rx_agg->buffer = page_address(rx_agg->page);
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rx_agg->urb = usb_alloc_urb(0, mflags);
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if (!rx_agg->urb)
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goto free_buf;
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rx_agg->context = tp;
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INIT_LIST_HEAD(&rx_agg->list);
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INIT_LIST_HEAD(&rx_agg->info_list);
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spin_lock_irqsave(&tp->rx_lock, flags);
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list_add_tail(&rx_agg->info_list, &tp->rx_info);
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spin_unlock_irqrestore(&tp->rx_lock, flags);
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atomic_inc(&tp->rx_count);
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return rx_agg;
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free_buf:
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__free_pages(rx_agg->page, order);
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free_rx:
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kfree(rx_agg);
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return NULL;
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}
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static void free_all_mem(struct r8152 *tp)
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{
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struct rx_agg *agg, *agg_next;
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unsigned long flags;
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int i;
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for (i = 0; i < RTL8152_MAX_RX; i++) {
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usb_free_urb(tp->rx_info[i].urb);
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tp->rx_info[i].urb = NULL;
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spin_lock_irqsave(&tp->rx_lock, flags);
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kfree(tp->rx_info[i].buffer);
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tp->rx_info[i].buffer = NULL;
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tp->rx_info[i].head = NULL;
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}
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list_for_each_entry_safe(agg, agg_next, &tp->rx_info, info_list)
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free_rx_agg(tp, agg);
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spin_unlock_irqrestore(&tp->rx_lock, flags);
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WARN_ON(atomic_read(&tp->rx_count));
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for (i = 0; i < RTL8152_MAX_TX; i++) {
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usb_free_urb(tp->tx_info[i].urb);
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@ -1502,46 +1566,28 @@ static int alloc_all_mem(struct r8152 *tp)
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struct usb_interface *intf = tp->intf;
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struct usb_host_interface *alt = intf->cur_altsetting;
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struct usb_host_endpoint *ep_intr = alt->endpoint + 2;
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struct urb *urb;
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int node, i;
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u8 *buf;
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node = netdev->dev.parent ? dev_to_node(netdev->dev.parent) : -1;
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spin_lock_init(&tp->rx_lock);
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spin_lock_init(&tp->tx_lock);
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INIT_LIST_HEAD(&tp->rx_info);
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INIT_LIST_HEAD(&tp->tx_free);
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INIT_LIST_HEAD(&tp->rx_done);
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skb_queue_head_init(&tp->tx_queue);
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skb_queue_head_init(&tp->rx_queue);
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atomic_set(&tp->rx_count, 0);
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for (i = 0; i < RTL8152_MAX_RX; i++) {
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buf = kmalloc_node(agg_buf_sz, GFP_KERNEL, node);
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if (!buf)
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if (!alloc_rx_agg(tp, GFP_KERNEL))
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goto err1;
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if (buf != rx_agg_align(buf)) {
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kfree(buf);
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buf = kmalloc_node(agg_buf_sz + RX_ALIGN, GFP_KERNEL,
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node);
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if (!buf)
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goto err1;
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}
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urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!urb) {
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kfree(buf);
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goto err1;
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}
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INIT_LIST_HEAD(&tp->rx_info[i].list);
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tp->rx_info[i].context = tp;
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tp->rx_info[i].urb = urb;
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tp->rx_info[i].buffer = buf;
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tp->rx_info[i].head = rx_agg_align(buf);
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}
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for (i = 0; i < RTL8152_MAX_TX; i++) {
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struct urb *urb;
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u8 *buf;
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buf = kmalloc_node(agg_buf_sz, GFP_KERNEL, node);
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if (!buf)
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goto err1;
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@ -1907,6 +1953,46 @@ return_result:
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return checksum;
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}
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static inline bool rx_count_exceed(struct r8152 *tp)
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{
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return atomic_read(&tp->rx_count) > RTL8152_MAX_RX;
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}
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static inline int agg_offset(struct rx_agg *agg, void *addr)
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{
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return (int)(addr - agg->buffer);
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}
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static struct rx_agg *rtl_get_free_rx(struct r8152 *tp, gfp_t mflags)
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{
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struct rx_agg *agg, *agg_next, *agg_free = NULL;
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unsigned long flags;
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spin_lock_irqsave(&tp->rx_lock, flags);
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list_for_each_entry_safe(agg, agg_next, &tp->rx_used, list) {
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if (page_count(agg->page) == 1) {
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if (!agg_free) {
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list_del_init(&agg->list);
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agg_free = agg;
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continue;
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}
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if (rx_count_exceed(tp)) {
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list_del_init(&agg->list);
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free_rx_agg(tp, agg);
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}
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break;
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}
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}
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spin_unlock_irqrestore(&tp->rx_lock, flags);
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if (!agg_free && atomic_read(&tp->rx_count) < tp->rx_pending)
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agg_free = alloc_rx_agg(tp, mflags);
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return agg_free;
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}
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static int rx_bottom(struct r8152 *tp, int budget)
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{
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unsigned long flags;
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@ -1942,7 +2028,7 @@ static int rx_bottom(struct r8152 *tp, int budget)
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list_for_each_safe(cursor, next, &rx_queue) {
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struct rx_desc *rx_desc;
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struct rx_agg *agg;
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struct rx_agg *agg, *agg_free;
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int len_used = 0;
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struct urb *urb;
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u8 *rx_data;
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@ -1954,14 +2040,16 @@ static int rx_bottom(struct r8152 *tp, int budget)
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if (urb->actual_length < ETH_ZLEN)
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goto submit;
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rx_desc = agg->head;
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rx_data = agg->head;
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agg_free = rtl_get_free_rx(tp, GFP_ATOMIC);
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rx_desc = agg->buffer;
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rx_data = agg->buffer;
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len_used += sizeof(struct rx_desc);
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while (urb->actual_length > len_used) {
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struct net_device *netdev = tp->netdev;
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struct net_device_stats *stats = &netdev->stats;
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unsigned int pkt_len;
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unsigned int pkt_len, rx_frag_head_sz;
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struct sk_buff *skb;
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/* limite the skb numbers for rx_queue */
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@ -1979,22 +2067,37 @@ static int rx_bottom(struct r8152 *tp, int budget)
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pkt_len -= ETH_FCS_LEN;
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rx_data += sizeof(struct rx_desc);
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skb = napi_alloc_skb(napi, pkt_len);
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if (!agg_free || tp->rx_copybreak > pkt_len)
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rx_frag_head_sz = pkt_len;
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else
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rx_frag_head_sz = tp->rx_copybreak;
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skb = napi_alloc_skb(napi, rx_frag_head_sz);
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if (!skb) {
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stats->rx_dropped++;
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goto find_next_rx;
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}
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skb->ip_summed = r8152_rx_csum(tp, rx_desc);
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memcpy(skb->data, rx_data, pkt_len);
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skb_put(skb, pkt_len);
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memcpy(skb->data, rx_data, rx_frag_head_sz);
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skb_put(skb, rx_frag_head_sz);
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pkt_len -= rx_frag_head_sz;
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rx_data += rx_frag_head_sz;
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if (pkt_len) {
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skb_add_rx_frag(skb, 0, agg->page,
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agg_offset(agg, rx_data),
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pkt_len,
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SKB_DATA_ALIGN(pkt_len));
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get_page(agg->page);
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}
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skb->protocol = eth_type_trans(skb, netdev);
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rtl_rx_vlan_tag(rx_desc, skb);
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if (work_done < budget) {
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napi_gro_receive(napi, skb);
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work_done++;
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stats->rx_packets++;
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stats->rx_bytes += pkt_len;
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stats->rx_bytes += skb->len;
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} else {
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__skb_queue_tail(&tp->rx_queue, skb);
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}
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@ -2002,10 +2105,24 @@ static int rx_bottom(struct r8152 *tp, int budget)
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find_next_rx:
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rx_data = rx_agg_align(rx_data + pkt_len + ETH_FCS_LEN);
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rx_desc = (struct rx_desc *)rx_data;
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len_used = (int)(rx_data - (u8 *)agg->head);
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len_used = agg_offset(agg, rx_data);
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len_used += sizeof(struct rx_desc);
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}
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WARN_ON(!agg_free && page_count(agg->page) > 1);
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if (agg_free) {
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spin_lock_irqsave(&tp->rx_lock, flags);
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if (page_count(agg->page) == 1) {
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list_add(&agg_free->list, &tp->rx_used);
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} else {
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list_add_tail(&agg->list, &tp->rx_used);
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agg = agg_free;
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urb = agg->urb;
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}
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spin_unlock_irqrestore(&tp->rx_lock, flags);
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}
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submit:
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if (!ret) {
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ret = r8152_submit_rx(tp, agg, GFP_ATOMIC);
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@ -2113,7 +2230,7 @@ int r8152_submit_rx(struct r8152 *tp, struct rx_agg *agg, gfp_t mem_flags)
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return 0;
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usb_fill_bulk_urb(agg->urb, tp->udev, usb_rcvbulkpipe(tp->udev, 1),
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agg->head, agg_buf_sz,
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agg->buffer, tp->rx_buf_sz,
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(usb_complete_t)read_bulk_callback, agg);
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|
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ret = usb_submit_urb(agg->urb, mem_flags);
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@ -2330,44 +2447,80 @@ static void rxdy_gated_en(struct r8152 *tp, bool enable)
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|
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static int rtl_start_rx(struct r8152 *tp)
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{
|
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int i, ret = 0;
|
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struct rx_agg *agg, *agg_next;
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struct list_head tmp_list;
|
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unsigned long flags;
|
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int ret = 0, i = 0;
|
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|
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INIT_LIST_HEAD(&tmp_list);
|
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|
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spin_lock_irqsave(&tp->rx_lock, flags);
|
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|
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INIT_LIST_HEAD(&tp->rx_done);
|
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for (i = 0; i < RTL8152_MAX_RX; i++) {
|
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INIT_LIST_HEAD(&tp->rx_info[i].list);
|
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ret = r8152_submit_rx(tp, &tp->rx_info[i], GFP_KERNEL);
|
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if (ret)
|
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break;
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INIT_LIST_HEAD(&tp->rx_used);
|
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|
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list_splice_init(&tp->rx_info, &tmp_list);
|
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|
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spin_unlock_irqrestore(&tp->rx_lock, flags);
|
||||
|
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list_for_each_entry_safe(agg, agg_next, &tmp_list, info_list) {
|
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INIT_LIST_HEAD(&agg->list);
|
||||
|
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/* Only RTL8152_MAX_RX rx_agg need to be submitted. */
|
||||
if (++i > RTL8152_MAX_RX) {
|
||||
spin_lock_irqsave(&tp->rx_lock, flags);
|
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list_add_tail(&agg->list, &tp->rx_used);
|
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spin_unlock_irqrestore(&tp->rx_lock, flags);
|
||||
} else if (unlikely(ret < 0)) {
|
||||
spin_lock_irqsave(&tp->rx_lock, flags);
|
||||
list_add_tail(&agg->list, &tp->rx_done);
|
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spin_unlock_irqrestore(&tp->rx_lock, flags);
|
||||
} else {
|
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ret = r8152_submit_rx(tp, agg, GFP_KERNEL);
|
||||
}
|
||||
}
|
||||
|
||||
if (ret && ++i < RTL8152_MAX_RX) {
|
||||
struct list_head rx_queue;
|
||||
unsigned long flags;
|
||||
|
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INIT_LIST_HEAD(&rx_queue);
|
||||
|
||||
do {
|
||||
struct rx_agg *agg = &tp->rx_info[i++];
|
||||
struct urb *urb = agg->urb;
|
||||
|
||||
urb->actual_length = 0;
|
||||
list_add_tail(&agg->list, &rx_queue);
|
||||
} while (i < RTL8152_MAX_RX);
|
||||
|
||||
spin_lock_irqsave(&tp->rx_lock, flags);
|
||||
list_splice_tail(&rx_queue, &tp->rx_done);
|
||||
spin_unlock_irqrestore(&tp->rx_lock, flags);
|
||||
}
|
||||
spin_lock_irqsave(&tp->rx_lock, flags);
|
||||
WARN_ON(!list_empty(&tp->rx_info));
|
||||
list_splice(&tmp_list, &tp->rx_info);
|
||||
spin_unlock_irqrestore(&tp->rx_lock, flags);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int rtl_stop_rx(struct r8152 *tp)
|
||||
{
|
||||
int i;
|
||||
struct rx_agg *agg, *agg_next;
|
||||
struct list_head tmp_list;
|
||||
unsigned long flags;
|
||||
|
||||
for (i = 0; i < RTL8152_MAX_RX; i++)
|
||||
usb_kill_urb(tp->rx_info[i].urb);
|
||||
INIT_LIST_HEAD(&tmp_list);
|
||||
|
||||
/* The usb_kill_urb() couldn't be used in atomic.
|
||||
* Therefore, move the list of rx_info to a tmp one.
|
||||
* Then, list_for_each_entry_safe could be used without
|
||||
* spin lock.
|
||||
*/
|
||||
|
||||
spin_lock_irqsave(&tp->rx_lock, flags);
|
||||
list_splice_init(&tp->rx_info, &tmp_list);
|
||||
spin_unlock_irqrestore(&tp->rx_lock, flags);
|
||||
|
||||
list_for_each_entry_safe(agg, agg_next, &tmp_list, info_list) {
|
||||
/* At least RTL8152_MAX_RX rx_agg have the page_count being
|
||||
* equal to 1, so the other ones could be freed safely.
|
||||
*/
|
||||
if (page_count(agg->page) > 1)
|
||||
free_rx_agg(tp, agg);
|
||||
else
|
||||
usb_kill_urb(agg->urb);
|
||||
}
|
||||
|
||||
/* Move back the list of temp to the rx_info */
|
||||
spin_lock_irqsave(&tp->rx_lock, flags);
|
||||
WARN_ON(!list_empty(&tp->rx_info));
|
||||
list_splice(&tmp_list, &tp->rx_info);
|
||||
spin_unlock_irqrestore(&tp->rx_lock, flags);
|
||||
|
||||
while (!skb_queue_empty(&tp->rx_queue))
|
||||
dev_kfree_skb(__skb_dequeue(&tp->rx_queue));
|
||||
@ -2447,7 +2600,7 @@ static void r8153_set_rx_early_timeout(struct r8152 *tp)
|
||||
|
||||
static void r8153_set_rx_early_size(struct r8152 *tp)
|
||||
{
|
||||
u32 ocp_data = agg_buf_sz - rx_reserved_size(tp->netdev->mtu);
|
||||
u32 ocp_data = tp->rx_buf_sz - rx_reserved_size(tp->netdev->mtu);
|
||||
|
||||
switch (tp->version) {
|
||||
case RTL_VER_03:
|
||||
@ -4954,6 +5107,77 @@ static int rtl8152_set_coalesce(struct net_device *netdev,
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int rtl8152_get_tunable(struct net_device *netdev,
|
||||
const struct ethtool_tunable *tunable, void *d)
|
||||
{
|
||||
struct r8152 *tp = netdev_priv(netdev);
|
||||
|
||||
switch (tunable->id) {
|
||||
case ETHTOOL_RX_COPYBREAK:
|
||||
*(u32 *)d = tp->rx_copybreak;
|
||||
break;
|
||||
default:
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int rtl8152_set_tunable(struct net_device *netdev,
|
||||
const struct ethtool_tunable *tunable,
|
||||
const void *d)
|
||||
{
|
||||
struct r8152 *tp = netdev_priv(netdev);
|
||||
u32 val;
|
||||
|
||||
switch (tunable->id) {
|
||||
case ETHTOOL_RX_COPYBREAK:
|
||||
val = *(u32 *)d;
|
||||
if (val < ETH_ZLEN) {
|
||||
netif_err(tp, rx_err, netdev,
|
||||
"Invalid rx copy break value\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (tp->rx_copybreak != val) {
|
||||
napi_disable(&tp->napi);
|
||||
tp->rx_copybreak = val;
|
||||
napi_enable(&tp->napi);
|
||||
}
|
||||
break;
|
||||
default:
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void rtl8152_get_ringparam(struct net_device *netdev,
|
||||
struct ethtool_ringparam *ring)
|
||||
{
|
||||
struct r8152 *tp = netdev_priv(netdev);
|
||||
|
||||
ring->rx_max_pending = RTL8152_RX_MAX_PENDING;
|
||||
ring->rx_pending = tp->rx_pending;
|
||||
}
|
||||
|
||||
static int rtl8152_set_ringparam(struct net_device *netdev,
|
||||
struct ethtool_ringparam *ring)
|
||||
{
|
||||
struct r8152 *tp = netdev_priv(netdev);
|
||||
|
||||
if (ring->rx_pending < (RTL8152_MAX_RX * 2))
|
||||
return -EINVAL;
|
||||
|
||||
if (tp->rx_pending != ring->rx_pending) {
|
||||
napi_disable(&tp->napi);
|
||||
tp->rx_pending = ring->rx_pending;
|
||||
napi_enable(&tp->napi);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct ethtool_ops ops = {
|
||||
.get_drvinfo = rtl8152_get_drvinfo,
|
||||
.get_link = ethtool_op_get_link,
|
||||
@ -4971,6 +5195,10 @@ static const struct ethtool_ops ops = {
|
||||
.set_eee = rtl_ethtool_set_eee,
|
||||
.get_link_ksettings = rtl8152_get_link_ksettings,
|
||||
.set_link_ksettings = rtl8152_set_link_ksettings,
|
||||
.get_tunable = rtl8152_get_tunable,
|
||||
.set_tunable = rtl8152_set_tunable,
|
||||
.get_ringparam = rtl8152_get_ringparam,
|
||||
.set_ringparam = rtl8152_set_ringparam,
|
||||
};
|
||||
|
||||
static int rtl8152_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
|
||||
@ -5115,6 +5343,7 @@ static int rtl_ops_init(struct r8152 *tp)
|
||||
ops->in_nway = rtl8152_in_nway;
|
||||
ops->hw_phy_cfg = r8152b_hw_phy_cfg;
|
||||
ops->autosuspend_en = rtl_runtime_suspend_enable;
|
||||
tp->rx_buf_sz = 16 * 1024;
|
||||
break;
|
||||
|
||||
case RTL_VER_03:
|
||||
@ -5132,6 +5361,7 @@ static int rtl_ops_init(struct r8152 *tp)
|
||||
ops->in_nway = rtl8153_in_nway;
|
||||
ops->hw_phy_cfg = r8153_hw_phy_cfg;
|
||||
ops->autosuspend_en = rtl8153_runtime_enable;
|
||||
tp->rx_buf_sz = 32 * 1024;
|
||||
break;
|
||||
|
||||
case RTL_VER_08:
|
||||
@ -5147,6 +5377,7 @@ static int rtl_ops_init(struct r8152 *tp)
|
||||
ops->in_nway = rtl8153_in_nway;
|
||||
ops->hw_phy_cfg = r8153b_hw_phy_cfg;
|
||||
ops->autosuspend_en = rtl8153b_runtime_enable;
|
||||
tp->rx_buf_sz = 32 * 1024;
|
||||
break;
|
||||
|
||||
default:
|
||||
@ -5321,6 +5552,9 @@ static int rtl8152_probe(struct usb_interface *intf,
|
||||
tp->speed = tp->mii.supports_gmii ? SPEED_1000 : SPEED_100;
|
||||
tp->duplex = DUPLEX_FULL;
|
||||
|
||||
tp->rx_copybreak = RTL8152_RXFG_HEADSZ;
|
||||
tp->rx_pending = 10 * RTL8152_MAX_RX;
|
||||
|
||||
intf->needs_remote_wakeup = 1;
|
||||
|
||||
tp->rtl_ops.init(tp);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user