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authorGiuseppe CAVALLARO <peppe.cavallaro@st.com>2014-11-18 09:47:00 +0100
committerDavid S. Miller <davem@davemloft.net>2014-11-19 21:04:57 +0100
commit915c199fc8cde9f9a5af19c1ea8c7c3c075d60e1 (patch)
treeafba59c951ccb1b65a1294372a977f8233c5118c /drivers
parentstmmac: update driver documentation (diff)
downloadlinux-915c199fc8cde9f9a5af19c1ea8c7c3c075d60e1.tar.xz
linux-915c199fc8cde9f9a5af19c1ea8c7c3c075d60e1.zip
stmmac: document common header file
This patch adds some useful comments inside the common header file to provide information about the APIs exposed by the driver. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/stmicro/stmmac/common.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
index 12a174e01d56..cd77289c3cfe 100644
--- a/drivers/net/ethernet/stmicro/stmmac/common.h
+++ b/drivers/net/ethernet/stmicro/stmmac/common.h
@@ -44,6 +44,7 @@
#undef FRAME_FILTER_DEBUG
/* #define FRAME_FILTER_DEBUG */
+/* Extra statistic and debug information exposed by ethtool */
struct stmmac_extra_stats {
/* Transmit errors */
unsigned long tx_underflow ____cacheline_aligned;
@@ -220,6 +221,7 @@ enum dma_irq_status {
handle_tx = 0x8,
};
+/* EEE and LPI defines */
#define CORE_IRQ_TX_PATH_IN_LPI_MODE (1 << 0)
#define CORE_IRQ_TX_PATH_EXIT_LPI_MODE (1 << 1)
#define CORE_IRQ_RX_PATH_IN_LPI_MODE (1 << 2)
@@ -229,6 +231,7 @@ enum dma_irq_status {
#define CORE_PCS_LINK_STATUS (1 << 6)
#define CORE_RGMII_IRQ (1 << 7)
+/* Physical Coding Sublayer */
struct rgmii_adv {
unsigned int pause;
unsigned int duplex;
@@ -294,6 +297,7 @@ struct dma_features {
#define JUMBO_LEN 9000
+/* Descriptors helpers */
struct stmmac_desc_ops {
/* DMA RX descriptor ring initialization */
void (*init_rx_desc) (struct dma_desc *p, int disable_rx_ic, int mode,
@@ -344,6 +348,7 @@ struct stmmac_desc_ops {
extern const struct stmmac_desc_ops enh_desc_ops;
extern const struct stmmac_desc_ops ndesc_ops;
+/* Specific DMA helpers */
struct stmmac_dma_ops {
/* DMA core initialization */
int (*init) (void __iomem *ioaddr, int pbl, int fb, int mb,
@@ -373,6 +378,7 @@ struct stmmac_dma_ops {
struct mac_device_info;
+/* Helpers to program the MAC core */
struct stmmac_ops {
/* MAC core initialization */
void (*core_init)(struct mac_device_info *hw, int mtu);
@@ -403,6 +409,7 @@ struct stmmac_ops {
void (*get_adv)(struct mac_device_info *hw, struct rgmii_adv *adv);
};
+/* PTP and HW Timer helpers */
struct stmmac_hwtimestamp {
void (*config_hw_tstamping) (void __iomem *ioaddr, u32 data);
void (*config_sub_second_increment) (void __iomem *ioaddr);
@@ -426,6 +433,7 @@ struct mii_regs {
unsigned int data; /* MII Data */
};
+/* Helpers to manage the descriptors for chain and ring modes */
struct stmmac_mode_ops {
void (*init) (void *des, dma_addr_t phy_addr, unsigned int size,
unsigned int extend_desc);