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-rw-r--r--Documentation/networking/stmmac.txt48
1 files changed, 37 insertions, 11 deletions
diff --git a/Documentation/networking/stmmac.txt b/Documentation/networking/stmmac.txt
index 7ee770b5ef5f..80a7a3454902 100644
--- a/Documentation/networking/stmmac.txt
+++ b/Documentation/networking/stmmac.txt
@@ -7,7 +7,7 @@ This is the driver for the MAC 10/100/1000 on-chip Ethernet controllers
7(Synopsys IP blocks); it has been fully tested on STLinux platforms. 7(Synopsys IP blocks); it has been fully tested on STLinux platforms.
8 8
9Currently this network device driver is for all STM embedded MAC/GMAC 9Currently this network device driver is for all STM embedded MAC/GMAC
10(7xxx SoCs). 10(7xxx SoCs). Other platforms start using it i.e. ARM SPEAr.
11 11
12DWC Ether MAC 10/100/1000 Universal version 3.41a and DWC Ether MAC 10/100 12DWC Ether MAC 10/100/1000 Universal version 3.41a and DWC Ether MAC 10/100
13Universal version 4.0 have been used for developing the first code 13Universal version 4.0 have been used for developing the first code
@@ -95,9 +95,14 @@ Several information came from the platform; please refer to the
95driver's Header file in include/linux directory. 95driver's Header file in include/linux directory.
96 96
97struct plat_stmmacenet_data { 97struct plat_stmmacenet_data {
98 int bus_id; 98 int bus_id;
99 int pbl; 99 int pbl;
100 int has_gmac; 100 int clk_csr;
101 int has_gmac;
102 int enh_desc;
103 int tx_coe;
104 int bugged_jumbo;
105 int pmt;
101 void (*fix_mac_speed)(void *priv, unsigned int speed); 106 void (*fix_mac_speed)(void *priv, unsigned int speed);
102 void (*bus_setup)(unsigned long ioaddr); 107 void (*bus_setup)(unsigned long ioaddr);
103#ifdef CONFIG_STM_DRIVERS 108#ifdef CONFIG_STM_DRIVERS
@@ -114,6 +119,12 @@ Where:
114 registers (on STM platforms); 119 registers (on STM platforms);
115- has_gmac: GMAC core is on board (get it at run-time in the next step); 120- has_gmac: GMAC core is on board (get it at run-time in the next step);
116- bus_id: bus identifier. 121- bus_id: bus identifier.
122- tx_coe: core is able to perform the tx csum in HW.
123- enh_desc: if sets the MAC will use the enhanced descriptor structure.
124- clk_csr: CSR Clock range selection.
125- bugged_jumbo: some HWs are not able to perform the csum in HW for
126 over-sized frames due to limited buffer sizes. Setting this
127 flag the csum will be done in SW on JUMBO frames.
117 128
118struct plat_stmmacphy_data { 129struct plat_stmmacphy_data {
119 int bus_id; 130 int bus_id;
@@ -131,13 +142,28 @@ Where:
131- interface: physical MII interface mode; 142- interface: physical MII interface mode;
132- phy_reset: hook to reset HW function. 143- phy_reset: hook to reset HW function.
133 144
145SOURCES:
146- Kconfig
147- Makefile
148- stmmac_main.c: main network device driver;
149- stmmac_mdio.c: mdio functions;
150- stmmac_ethtool.c: ethtool support;
151- stmmac_timer.[ch]: timer code used for mitigating the driver dma interrupts
152 Only tested on ST40 platforms based.
153- stmmac.h: private driver structure;
154- common.h: common definitions and VFTs;
155- descs.h: descriptor structure definitions;
156- dwmac1000_core.c: GMAC core functions;
157- dwmac1000_dma.c: dma functions for the GMAC chip;
158- dwmac1000.h: specific header file for the GMAC;
159- dwmac100_core: MAC 100 core and dma code;
160- dwmac100_dma.c: dma funtions for the MAC chip;
161- dwmac1000.h: specific header file for the MAC;
162- dwmac_lib.c: generic DMA functions shared among chips
163- enh_desc.c: functions for handling enhanced descriptors
164- norm_desc.c: functions for handling normal descriptors
165
134TODO: 166TODO:
135- Continue to make the driver more generic and suitable for other Synopsys 167- XGMAC controller is not supported.
136 Ethernet controllers used on other architectures (i.e. ARM).
137- 10G controllers are not supported.
138- MAC uses Normal descriptors and GMAC uses enhanced ones.
139 This is a limit that should be reviewed. MAC could want to
140 use the enhanced structure.
141- Checksumming: Rx/Tx csum is done in HW in case of GMAC only.
142- Review the timer optimisation code to use an embedded device that seems to be 168- Review the timer optimisation code to use an embedded device that seems to be
143 available in new chip generations. 169 available in new chip generations.