| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sun, 15 Oct 2017 19:23:07 +0300
From: Roman Yeryomin <roman@...em.lv>
To: netdev <netdev@...r.kernel.org>
Subject: [PATCH net-next 03/10] net: korina: introduce and use interrupt disable/enable helpers
Signed-off-by: Roman Yeryomin <roman@...em.lv>
---
drivers/net/ethernet/korina.c | 83 +++++++++++++++++++++++++------------------
1 file changed, 48 insertions(+), 35 deletions(-)
diff --git a/drivers/net/ethernet/korina.c b/drivers/net/ethernet/korina.c
index 5545f86aac4a..04c1a3f38a79 100644
--- a/drivers/net/ethernet/korina.c
+++ b/drivers/net/ethernet/korina.c
@@ -91,6 +91,10 @@
#define RD_RING_SIZE (KORINA_NUM_RDS * sizeof(struct dma_desc))
#define TD_RING_SIZE (KORINA_NUM_TDS * sizeof(struct dma_desc))
+#define KORINA_INT_TX (DMA_STAT_FINI | DMA_STAT_ERR)
+#define KORINA_INT_RX (DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR)
+#define KORINA_INT_TXRX (KORINA_INT_TX | KORINA_INT_RX)
+
#define TX_TIMEOUT (6000 * HZ / 1000)
enum chain_status {
@@ -142,6 +146,38 @@ struct korina_private {
extern unsigned int idt_cpu_freq;
+static inline void korina_int_disable(u32 *dmasm, u32 ints)
+{
+ u32 tmp = readl(dmasm);
+ writel(tmp | ints, dmasm);
+}
+
+static inline void korina_int_enable(u32 *dmasm, u32 ints)
+{
+ u32 tmp = readl(dmasm);
+ writel(tmp & ~ints, dmasm);
+}
+
+static inline void korina_int_disable_tx(struct korina_private *kp)
+{
+ korina_int_disable(&kp->tx_dma_regs->dmasm, KORINA_INT_TX);
+}
+
+static inline void korina_int_disable_rx(struct korina_private *kp)
+{
+ korina_int_disable(&kp->rx_dma_regs->dmasm, KORINA_INT_RX);
+}
+
+static inline void korina_int_enable_tx(struct korina_private *kp)
+{
+ korina_int_enable(&kp->tx_dma_regs->dmasm, KORINA_INT_TX);
+}
+
+static inline void korina_int_enable_rx(struct korina_private *kp)
+{
+ korina_int_enable(&kp->rx_dma_regs->dmasm, KORINA_INT_RX);
+}
+
static inline void korina_start_dma(struct dma_reg *ch, u32 dma_addr)
{
writel(0, &ch->dmandptr);
@@ -369,9 +405,7 @@ static void korina_tx(struct net_device *dev)
dmas = readl(&lp->tx_dma_regs->dmas);
writel(~dmas, &lp->tx_dma_regs->dmas);
- writel(readl(&lp->tx_dma_regs->dmasm) &
- ~(DMA_STAT_FINI | DMA_STAT_ERR),
- &lp->tx_dma_regs->dmasm);
+ korina_int_enable_tx(lp);
spin_unlock(&lp->lock);
}
@@ -497,10 +531,7 @@ static int korina_poll(struct napi_struct *napi, int budget)
work_done = korina_rx(dev, budget);
if (work_done < budget) {
napi_complete_done(napi, work_done);
-
- writel(readl(&lp->rx_dma_regs->dmasm) &
- ~(DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR),
- &lp->rx_dma_regs->dmasm);
+ korina_int_enable_rx(lp);
}
return work_done;
}
@@ -510,15 +541,13 @@ korina_tx_dma_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct korina_private *lp = netdev_priv(dev);
- u32 dmas, dmasm;
+ u32 dmas;
irqreturn_t retval;
dmas = readl(&lp->tx_dma_regs->dmas);
if (dmas & (DMA_STAT_FINI | DMA_STAT_ERR)) {
- dmasm = readl(&lp->tx_dma_regs->dmasm);
- writel(dmasm | (DMA_STAT_FINI | DMA_STAT_ERR),
- &lp->tx_dma_regs->dmasm);
+ korina_int_disable_tx(lp);
korina_tx(dev);
@@ -545,15 +574,12 @@ static irqreturn_t korina_rx_dma_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct korina_private *lp = netdev_priv(dev);
- u32 dmas, dmasm;
+ u32 dmas;
irqreturn_t retval;
dmas = readl(&lp->rx_dma_regs->dmas);
if (dmas & (DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR)) {
- dmasm = readl(&lp->rx_dma_regs->dmasm);
- writel(dmasm | (DMA_STAT_DONE |
- DMA_STAT_HALT | DMA_STAT_ERR),
- &lp->rx_dma_regs->dmasm);
+ korina_int_disable_rx(lp);
napi_schedule(&lp->napi);
@@ -803,12 +829,8 @@ static int korina_init(struct net_device *dev)
/* Start Rx DMA */
korina_start_rx(lp, &lp->rd_ring[0]);
- writel(readl(&lp->tx_dma_regs->dmasm) &
- ~(DMA_STAT_FINI | DMA_STAT_ERR),
- &lp->tx_dma_regs->dmasm);
- writel(readl(&lp->rx_dma_regs->dmasm) &
- ~(DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR),
- &lp->rx_dma_regs->dmasm);
+ korina_int_enable_tx(lp);
+ korina_int_enable_rx(lp);
/* Accept only packets destined for this Ethernet device address */
writel(ETH_ARC_AB, &lp->eth_regs->etharc);
@@ -867,12 +889,8 @@ static void korina_restart_task(struct work_struct *work)
disable_irq(lp->rx_irq);
disable_irq(lp->tx_irq);
- writel(readl(&lp->tx_dma_regs->dmasm) |
- DMA_STAT_FINI | DMA_STAT_ERR,
- &lp->tx_dma_regs->dmasm);
- writel(readl(&lp->rx_dma_regs->dmasm) |
- DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR,
- &lp->rx_dma_regs->dmasm);
+ korina_int_disable_tx(lp);
+ korina_int_disable_rx(lp);
napi_disable(&lp->napi);
@@ -947,7 +965,6 @@ static int korina_open(struct net_device *dev)
static int korina_close(struct net_device *dev)
{
struct korina_private *lp = netdev_priv(dev);
- u32 tmp;
del_timer(&lp->media_check_timer);
@@ -956,14 +973,10 @@ static int korina_close(struct net_device *dev)
disable_irq(lp->tx_irq);
korina_abort_tx(dev);
- tmp = readl(&lp->tx_dma_regs->dmasm);
- tmp = tmp | DMA_STAT_FINI | DMA_STAT_ERR;
- writel(tmp, &lp->tx_dma_regs->dmasm);
+ korina_int_disable_tx(lp);
korina_abort_rx(dev);
- tmp = readl(&lp->rx_dma_regs->dmasm);
- tmp = tmp | DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR;
- writel(tmp, &lp->rx_dma_regs->dmasm);
+ korina_int_disable_rx(lp);
napi_disable(&lp->napi);
--
2.11.0
Powered by blists - more mailing lists