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-rw-r--r--arch/arm/mach-spear3xx/spear300.c26
-rw-r--r--arch/arm/mach-spear3xx/spear310.c26
-rw-r--r--arch/arm/mach-spear3xx/spear320.c26
-rw-r--r--arch/arm/mach-spear3xx/spear3xx.c3
-rw-r--r--arch/arm/mach-spear6xx/spear6xx.c51
-rw-r--r--arch/arm/plat-spear/include/plat/pl080.h6
-rw-r--r--arch/arm/plat-spear/pl080.c10
-rw-r--r--drivers/dma/Kconfig1
-rw-r--r--drivers/dma/amba-pl08x.c941
-rw-r--r--drivers/dma/sa11x0-dma.c153
-rw-r--r--include/linux/amba/pl08x.h156
11 files changed, 614 insertions, 785 deletions
diff --git a/arch/arm/mach-spear3xx/spear300.c b/arch/arm/mach-spear3xx/spear300.c
index 0f882ecb7d81..6ec300549960 100644
--- a/arch/arm/mach-spear3xx/spear300.c
+++ b/arch/arm/mach-spear3xx/spear300.c
@@ -120,182 +120,156 @@ struct pl08x_channel_data spear300_dma_info[] = {
.min_signal = 2,
.max_signal = 2,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart0_tx",
.min_signal = 3,
.max_signal = 3,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp0_rx",
.min_signal = 8,
.max_signal = 8,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp0_tx",
.min_signal = 9,
.max_signal = 9,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "i2c_rx",
.min_signal = 10,
.max_signal = 10,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "i2c_tx",
.min_signal = 11,
.max_signal = 11,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "irda",
.min_signal = 12,
.max_signal = 12,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "adc",
.min_signal = 13,
.max_signal = 13,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "to_jpeg",
.min_signal = 14,
.max_signal = 14,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "from_jpeg",
.min_signal = 15,
.max_signal = 15,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras0_rx",
.min_signal = 0,
.max_signal = 0,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras0_tx",
.min_signal = 1,
.max_signal = 1,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras1_rx",
.min_signal = 2,
.max_signal = 2,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras1_tx",
.min_signal = 3,
.max_signal = 3,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras2_rx",
.min_signal = 4,
.max_signal = 4,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras2_tx",
.min_signal = 5,
.max_signal = 5,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras3_rx",
.min_signal = 6,
.max_signal = 6,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras3_tx",
.min_signal = 7,
.max_signal = 7,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras4_rx",
.min_signal = 8,
.max_signal = 8,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras4_tx",
.min_signal = 9,
.max_signal = 9,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras5_rx",
.min_signal = 10,
.max_signal = 10,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras5_tx",
.min_signal = 11,
.max_signal = 11,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras6_rx",
.min_signal = 12,
.max_signal = 12,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras6_tx",
.min_signal = 13,
.max_signal = 13,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras7_rx",
.min_signal = 14,
.max_signal = 14,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras7_tx",
.min_signal = 15,
.max_signal = 15,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
},
};
diff --git a/arch/arm/mach-spear3xx/spear310.c b/arch/arm/mach-spear3xx/spear310.c
index bbcf4571d361..1d0e435b9045 100644
--- a/arch/arm/mach-spear3xx/spear310.c
+++ b/arch/arm/mach-spear3xx/spear310.c
@@ -205,182 +205,156 @@ struct pl08x_channel_data spear310_dma_info[] = {
.min_signal = 2,
.max_signal = 2,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart0_tx",
.min_signal = 3,
.max_signal = 3,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp0_rx",
.min_signal = 8,
.max_signal = 8,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp0_tx",
.min_signal = 9,
.max_signal = 9,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "i2c_rx",
.min_signal = 10,
.max_signal = 10,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "i2c_tx",
.min_signal = 11,
.max_signal = 11,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "irda",
.min_signal = 12,
.max_signal = 12,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "adc",
.min_signal = 13,
.max_signal = 13,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "to_jpeg",
.min_signal = 14,
.max_signal = 14,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "from_jpeg",
.min_signal = 15,
.max_signal = 15,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart1_rx",
.min_signal = 0,
.max_signal = 0,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart1_tx",
.min_signal = 1,
.max_signal = 1,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart2_rx",
.min_signal = 2,
.max_signal = 2,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart2_tx",
.min_signal = 3,
.max_signal = 3,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart3_rx",
.min_signal = 4,
.max_signal = 4,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart3_tx",
.min_signal = 5,
.max_signal = 5,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart4_rx",
.min_signal = 6,
.max_signal = 6,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart4_tx",
.min_signal = 7,
.max_signal = 7,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart5_rx",
.min_signal = 8,
.max_signal = 8,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart5_tx",
.min_signal = 9,
.max_signal = 9,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras5_rx",
.min_signal = 10,
.max_signal = 10,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras5_tx",
.min_signal = 11,
.max_signal = 11,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras6_rx",
.min_signal = 12,
.max_signal = 12,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras6_tx",
.min_signal = 13,
.max_signal = 13,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras7_rx",
.min_signal = 14,
.max_signal = 14,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras7_tx",
.min_signal = 15,
.max_signal = 15,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
},
};
diff --git a/arch/arm/mach-spear3xx/spear320.c b/arch/arm/mach-spear3xx/spear320.c
index 88d483bcd66a..fd823c624575 100644
--- a/arch/arm/mach-spear3xx/spear320.c
+++ b/arch/arm/mach-spear3xx/spear320.c
@@ -213,182 +213,156 @@ struct pl08x_channel_data spear320_dma_info[] = {
.min_signal = 2,
.max_signal = 2,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart0_tx",
.min_signal = 3,
.max_signal = 3,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp0_rx",
.min_signal = 8,
.max_signal = 8,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp0_tx",
.min_signal = 9,
.max_signal = 9,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "i2c0_rx",
.min_signal = 10,
.max_signal = 10,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "i2c0_tx",
.min_signal = 11,
.max_signal = 11,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "irda",
.min_signal = 12,
.max_signal = 12,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "adc",
.min_signal = 13,
.max_signal = 13,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "to_jpeg",
.min_signal = 14,
.max_signal = 14,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "from_jpeg",
.min_signal = 15,
.max_signal = 15,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp1_rx",
.min_signal = 0,
.max_signal = 0,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ssp1_tx",
.min_signal = 1,
.max_signal = 1,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ssp2_rx",
.min_signal = 2,
.max_signal = 2,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ssp2_tx",
.min_signal = 3,
.max_signal = 3,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart1_rx",
.min_signal = 4,
.max_signal = 4,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart1_tx",
.min_signal = 5,
.max_signal = 5,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart2_rx",
.min_signal = 6,
.max_signal = 6,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart2_tx",
.min_signal = 7,
.max_signal = 7,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "i2c1_rx",
.min_signal = 8,
.max_signal = 8,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "i2c1_tx",
.min_signal = 9,
.max_signal = 9,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "i2c2_rx",
.min_signal = 10,
.max_signal = 10,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "i2c2_tx",
.min_signal = 11,
.max_signal = 11,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "i2s_rx",
.min_signal = 12,
.max_signal = 12,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "i2s_tx",
.min_signal = 13,
.max_signal = 13,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "rs485_rx",
.min_signal = 14,
.max_signal = 14,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "rs485_tx",
.min_signal = 15,
.max_signal = 15,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
},
};
diff --git a/arch/arm/mach-spear3xx/spear3xx.c b/arch/arm/mach-spear3xx/spear3xx.c
index 0f41bd1c47c3..d6cd8403fe66 100644
--- a/arch/arm/mach-spear3xx/spear3xx.c
+++ b/arch/arm/mach-spear3xx/spear3xx.c
@@ -46,7 +46,8 @@ struct pl022_ssp_controller pl022_plat_data = {
struct pl08x_platform_data pl080_plat_data = {
.memcpy_channel = {
.bus_id = "memcpy",
- .cctl = (PL080_BSIZE_16 << PL080_CONTROL_SB_SIZE_SHIFT | \
+ .cctl_memcpy =
+ (PL080_BSIZE_16 << PL080_CONTROL_SB_SIZE_SHIFT | \
PL080_BSIZE_16 << PL080_CONTROL_DB_SIZE_SHIFT | \
PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT | \
PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT | \
diff --git a/arch/arm/mach-spear6xx/spear6xx.c b/arch/arm/mach-spear6xx/spear6xx.c
index 2e2e3596583e..b59ae5369e7b 100644
--- a/arch/arm/mach-spear6xx/spear6xx.c
+++ b/arch/arm/mach-spear6xx/spear6xx.c
@@ -36,336 +36,288 @@ static struct pl08x_channel_data spear600_dma_info[] = {
.min_signal = 0,
.max_signal = 0,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp1_tx",
.min_signal = 1,
.max_signal = 1,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart0_rx",
.min_signal = 2,
.max_signal = 2,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart0_tx",
.min_signal = 3,
.max_signal = 3,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart1_rx",
.min_signal = 4,
.max_signal = 4,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart1_tx",
.min_signal = 5,
.max_signal = 5,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp2_rx",
.min_signal = 6,
.max_signal = 6,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ssp2_tx",
.min_signal = 7,
.max_signal = 7,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ssp0_rx",
.min_signal = 8,
.max_signal = 8,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp0_tx",
.min_signal = 9,
.max_signal = 9,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "i2c_rx",
.min_signal = 10,
.max_signal = 10,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "i2c_tx",
.min_signal = 11,
.max_signal = 11,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "irda",
.min_signal = 12,
.max_signal = 12,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "adc",
.min_signal = 13,
.max_signal = 13,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "to_jpeg",
.min_signal = 14,
.max_signal = 14,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "from_jpeg",
.min_signal = 15,
.max_signal = 15,
.muxval = 0,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras0_rx",
.min_signal = 0,
.max_signal = 0,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras0_tx",
.min_signal = 1,
.max_signal = 1,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras1_rx",
.min_signal = 2,
.max_signal = 2,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras1_tx",
.min_signal = 3,
.max_signal = 3,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras2_rx",
.min_signal = 4,
.max_signal = 4,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras2_tx",
.min_signal = 5,
.max_signal = 5,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras3_rx",
.min_signal = 6,
.max_signal = 6,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras3_tx",
.min_signal = 7,
.max_signal = 7,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras4_rx",
.min_signal = 8,
.max_signal = 8,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras4_tx",
.min_signal = 9,
.max_signal = 9,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras5_rx",
.min_signal = 10,
.max_signal = 10,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras5_tx",
.min_signal = 11,
.max_signal = 11,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras6_rx",
.min_signal = 12,
.max_signal = 12,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras6_tx",
.min_signal = 13,
.max_signal = 13,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras7_rx",
.min_signal = 14,
.max_signal = 14,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras7_tx",
.min_signal = 15,
.max_signal = 15,
.muxval = 1,
- .cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ext0_rx",
.min_signal = 0,
.max_signal = 0,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext0_tx",
.min_signal = 1,
.max_signal = 1,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext1_rx",
.min_signal = 2,
.max_signal = 2,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext1_tx",
.min_signal = 3,
.max_signal = 3,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext2_rx",
.min_signal = 4,
.max_signal = 4,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext2_tx",
.min_signal = 5,
.max_signal = 5,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext3_rx",
.min_signal = 6,
.max_signal = 6,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext3_tx",
.min_signal = 7,
.max_signal = 7,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext4_rx",
.min_signal = 8,
.max_signal = 8,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext4_tx",
.min_signal = 9,
.max_signal = 9,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext5_rx",
.min_signal = 10,
.max_signal = 10,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext5_tx",
.min_signal = 11,
.max_signal = 11,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext6_rx",
.min_signal = 12,
.max_signal = 12,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext6_tx",
.min_signal = 13,
.max_signal = 13,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext7_rx",
.min_signal = 14,
.max_signal = 14,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext7_tx",
.min_signal = 15,
.max_signal = 15,
.muxval = 2,
- .cctl = 0,
.periph_buses = PL08X_AHB2,
},
};
@@ -373,7 +325,8 @@ static struct pl08x_channel_data spear600_dma_info[] = {
struct pl08x_platform_data pl080_plat_data = {
.memcpy_channel = {
.bus_id = "memcpy",
- .cctl = (PL080_BSIZE_16 << PL080_CONTROL_SB_SIZE_SHIFT | \
+ .cctl_memcpy =
+ (PL080_BSIZE_16 << PL080_CONTROL_SB_SIZE_SHIFT | \
PL080_BSIZE_16 << PL080_CONTROL_DB_SIZE_SHIFT | \
PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT | \
PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT | \
diff --git a/arch/arm/plat-spear/include/plat/pl080.h b/arch/arm/plat-spear/include/plat/pl080.h
index 2bc6b54460a8..eb6590ded40d 100644
--- a/arch/arm/plat-spear/include/plat/pl080.h
+++ b/arch/arm/plat-spear/include/plat/pl080.h
@@ -14,8 +14,8 @@
#ifndef __PLAT_PL080_H
#define __PLAT_PL080_H
-struct pl08x_dma_chan;
-int pl080_get_signal(struct pl08x_dma_chan *ch);
-void pl080_put_signal(struct pl08x_dma_chan *ch);
+struct pl08x_channel_data;
+int pl080_get_signal(const struct pl08x_channel_data *cd);
+void pl080_put_signal(const struct pl08x_channel_data *cd, int signal);
#endif /* __PLAT_PL080_H */
diff --git a/arch/arm/plat-spear/pl080.c b/arch/arm/plat-spear/pl080.c
index 12cf27f935f9..cfa1199d0f4a 100644
--- a/arch/arm/plat-spear/pl080.c
+++ b/arch/arm/plat-spear/pl080.c
@@ -27,9 +27,8 @@ struct {
unsigned char val;
} signals[16] = {{0, 0}, };
-int pl080_get_signal(struct pl08x_dma_chan *ch)
+int pl080_get_signal(const struct pl08x_channel_data *cd)
{
- const struct pl08x_channel_data *cd = ch->cd;
unsigned int signal = cd->min_signal, val;
unsigned long flags;
@@ -63,18 +62,17 @@ int pl080_get_signal(struct pl08x_dma_chan *ch)
return signal;
}
-void pl080_put_signal(struct pl08x_dma_chan *ch)
+void pl080_put_signal(const struct pl08x_channel_data *cd, int signal)
{
- const struct pl08x_channel_data *cd = ch->cd;
unsigned long flags;
spin_lock_irqsave(&lock, flags);
/* if signal is not used */
- if (!signals[cd->min_signal].busy)
+ if (!signals[signal].busy)
BUG();
- signals[cd->min_signal].busy--;
+ signals[signal].busy--;
spin_unlock_irqrestore(&lock, flags);
}
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 8be3bf68c0bd..6f93365d9d04 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -53,6 +53,7 @@ config AMBA_PL08X
bool "ARM PrimeCell PL080 or PL081 support"
depends on ARM_AMBA && EXPERIMENTAL
select DMA_ENGINE
+ select DMA_VIRTUAL_CHANNELS
help
Platform has a PL08x DMAC device
which can provide DMA engine support
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 49ecbbb8932d..6fbeebb9486f 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -86,10 +86,12 @@
#include <asm/hardware/pl080.h>
#include "dmaengine.h"
+#include "virt-dma.h"
#define DRIVER_NAME "pl08xdmac"
static struct amba_driver pl08x_amba_driver;
+struct pl08x_driver_data;
/**
* struct vendor_data - vendor-specific config parameters for PL08x derivatives
@@ -119,6 +121,123 @@ struct pl08x_lli {
};
/**
+ * struct pl08x_bus_data - information of source or destination
+ * busses for a transfer
+ * @addr: current address
+ * @maxwidth: the maximum width of a transfer on this bus
+ * @buswidth: the width of this bus in bytes: 1, 2 or 4
+ */
+struct pl08x_bus_data {
+ dma_addr_t addr;
+ u8 maxwidth;
+ u8 buswidth;
+};
+
+/**
+ * struct pl08x_phy_chan - holder for the physical channels
+ * @id: physical index to this channel
+ * @lock: a lock to use when altering an instance of this struct
+ * @serving: the virtual channel currently being served by this physical
+ * channel
+ * @locked: channel unavailable for the system, e.g. dedicated to secure
+ * world
+ */
+struct pl08x_phy_chan {
+ unsigned int id;
+ void __iomem *base;
+ spinlock_t lock;
+ struct pl08x_dma_chan *serving;
+ bool locked;
+};
+
+/**
+ * struct pl08x_sg - structure containing data per sg
+ * @src_addr: src address of sg
+ * @dst_addr: dst address of sg
+ * @len: transfer len in bytes
+ * @node: node for txd's dsg_list
+ */
+struct pl08x_sg {
+ dma_addr_t src_addr;
+ dma_addr_t dst_addr;
+ size_t len;
+ struct list_head node;
+};
+
+/**
+ * struct pl08x_txd - wrapper for struct dma_async_tx_descriptor
+ * @vd: virtual DMA descriptor
+ * @dsg_list: list of children sg's
+ * @llis_bus: DMA memory address (physical) start for the LLIs
+ * @llis_va: virtual memory address start for the LLIs
+ * @cctl: control reg values for current txd
+ * @ccfg: config reg values for current txd
+ * @done: this marks completed descriptors, which should not have their
+ * mux released.
+ */
+struct pl08x_txd {
+ struct virt_dma_desc vd;
+ struct list_head dsg_list;
+ dma_addr_t llis_bus;
+ struct pl08x_lli *llis_va;
+ /* Default cctl value for LLIs */
+ u32 cctl;
+ /*
+ * Settings to be put into the physical channel when we
+ * trigger this txd. Other registers are in llis_va[0].
+ */
+ u32 ccfg;
+ bool done;
+};
+
+/**
+ * struct pl08x_dma_chan_state - holds the PL08x specific virtual channel
+ * states
+ * @PL08X_CHAN_IDLE: the channel is idle
+ * @PL08X_CHAN_RUNNING: the channel has allocated a physical transport
+ * channel and is running a transfer on it
+ * @PL08X_CHAN_PAUSED: the channel has allocated a physical transport
+ * channel, but the transfer is currently paused
+ * @PL08X_CHAN_WAITING: the channel is waiting for a physical transport
+ * channel to become available (only pertains to memcpy channels)
+ */
+enum pl08x_dma_chan_state {
+ PL08X_CHAN_IDLE,
+ PL08X_CHAN_RUNNING,
+ PL08X_CHAN_PAUSED,
+ PL08X_CHAN_WAITING,
+};
+
+/**
+ * struct pl08x_dma_chan - this structure wraps a DMA ENGINE channel
+ * @vc: wrappped virtual channel
+ * @phychan: the physical channel utilized by this channel, if there is one
+ * @name: name of channel
+ * @cd: channel platform data
+ * @runtime_addr: address for RX/TX according to the runtime config
+ * @at: active transaction on this channel
+ * @lock: a lock for this channel data
+ * @host: a pointer to the host (internal use)
+ * @state: whether the channel is idle, paused, running etc
+ * @slave: whether this channel is a device (slave) or for memcpy
+ * @signal: the physical DMA request signal which this channel is using
+ * @mux_use: count of descriptors using this DMA request signal setting
+ */
+struct pl08x_dma_chan {
+ struct virt_dma_chan vc;
+ struct pl08x_phy_chan *phychan;
+ const char *name;
+ const struct pl08x_channel_data *cd;
+ struct dma_slave_config cfg;
+ struct pl08x_txd *at;
+ struct pl08x_driver_data *host;
+ enum pl08x_dma_chan_state state;
+ bool slave;
+ int signal;
+ unsigned mux_use;
+};
+
+/**
* struct pl08x_driver_data - the local state holder for the PL08x
* @slave: slave engine for this instance
* @memcpy: memcpy engine for this instance
@@ -128,7 +247,6 @@ struct pl08x_lli {
* @pd: platform data passed in from the platform/machine
* @phy_chans: array of data for the physical channels
* @pool: a pool for the LLI descriptors
- * @pool_ctr: counter of LLIs in the pool
* @lli_buses: bitmask to or in to LLI pointer selecting AHB port for LLI
* fetches
* @mem_buses: set to indicate memory transfers on AHB2.
@@ -143,10 +261,8 @@ struct pl08x_driver_data {
struct pl08x_platform_data *pd;
struct pl08x_phy_chan *phy_chans;
struct dma_pool *pool;
- int pool_ctr;
u8 lli_buses;
u8 mem_buses;
- spinlock_t lock;
};
/*
@@ -162,12 +278,51 @@ struct pl08x_driver_data {
static inline struct pl08x_dma_chan *to_pl08x_chan(struct dma_chan *chan)
{
- return container_of(chan, struct pl08x_dma_chan, chan);
+ return container_of(chan, struct pl08x_dma_chan, vc.chan);
}
static inline struct pl08x_txd *to_pl08x_txd(struct dma_async_tx_descriptor *tx)
{
- return container_of(tx, struct pl08x_txd, tx);
+ return container_of(tx, struct pl08x_txd, vd.tx);
+}
+
+/*
+ * Mux handling.
+ *
+ * This gives us the DMA request input to the PL08x primecell which the
+ * peripheral described by the channel data will be routed to, possibly
+ * via a board/SoC specific external MUX. One important point to note
+ * here is that this does not depend on the physical channel.
+ */
+static int pl08x_request_mux(struct pl08x_dma_chan *plchan)
+{
+ const struct pl08x_platform_data *pd = plchan->host->pd;
+ int ret;
+
+ if (plchan->mux_use++ == 0 && pd->get_signal) {
+ ret = pd->get_signal(plchan->cd);
+ if (ret < 0) {
+ plchan->mux_use = 0;
+ return ret;
+ }
+
+ plchan->signal = ret;
+ }
+ return 0;
+}
+
+static void pl08x_release_mux(struct pl08x_dma_chan *plchan)
+{
+ const struct pl08x_platform_data *pd = plchan->host->pd;
+
+ if (plchan->signal >= 0) {
+ WARN_ON(plchan->mux_use == 0);
+
+ if (--plchan->mux_use == 0 && pd->put_signal) {
+ pd->put_signal(plchan->cd, plchan->signal);
+ plchan->signal = -1;
+ }
+ }
}
/*
@@ -189,20 +344,25 @@ static int pl08x_phy_channel_busy(struct pl08x_phy_chan *ch)
* been set when the LLIs were constructed. Poke them into the hardware
* and start the transfer.
*/
-static void pl08x_start_txd(struct pl08x_dma_chan *plchan,
- struct pl08x_txd *txd)
+static void pl08x_start_next_txd(struct pl08x_dma_chan *plchan)
{
struct pl08x_driver_data *pl08x = plchan->host;
struct pl08x_phy_chan *phychan = plchan->phychan;
- struct pl08x_lli *lli = &txd->llis_va[0];
+ struct virt_dma_desc *vd = vchan_next_desc(&plchan->vc);
+ struct pl08x_txd *txd = to_pl08x_txd(&vd->tx);
+ struct pl08x_lli *lli;
u32 val;
+ list_del(&txd->vd.node);
+
plchan->at = txd;
/* Wait for channel inactive */
while (pl08x_phy_channel_busy(phychan))
cpu_relax();
+ lli = &txd->llis_va[0];
+
dev_vdbg(&pl08x->adev->dev,
"WRITE channel %d: csrc=0x%08x, cdst=0x%08x, "
"clli=0x%08x, cctl=0x%08x, ccfg=0x%08x\n",
@@ -311,10 +471,8 @@ static u32 pl08x_getbytes_chan(struct pl08x_dma_chan *plchan)
{
struct pl08x_phy_chan *ch;
struct pl08x_txd *txd;
- unsigned long flags;
size_t bytes = 0;
- spin_lock_irqsave(&plchan->lock, flags);
ch = plchan->phychan;
txd = plchan->at;
@@ -354,18 +512,6 @@ static u32 pl08x_getbytes_chan(struct pl08x_dma_chan *plchan)
}
}
- /* Sum up all queued transactions */
- if (!list_empty(&plchan->pend_list)) {
- struct pl08x_txd *txdi;
- list_for_each_entry(txdi, &plchan->pend_list, node) {
- struct pl08x_sg *dsg;
- list_for_each_entry(dsg, &txd->dsg_list, node)
- bytes += dsg->len;
- }
- }
-
- spin_unlock_irqrestore(&plchan->lock, flags);
-
return bytes;
}
@@ -391,7 +537,6 @@ pl08x_get_phy_channel(struct pl08x_driver_data *pl08x,
if (!ch->locked && !ch->serving) {
ch->serving = virt_chan;
- ch->signal = -1;
spin_unlock_irqrestore(&ch->lock, flags);
break;
}
@@ -404,25 +549,114 @@ pl08x_get_phy_channel(struct pl08x_driver_data *pl08x,
return NULL;
}
- pm_runtime_get_sync(&pl08x->adev->dev);
return ch;
}
+/* Mark the physical channel as free. Note, this write is atomic. */
static inline void pl08x_put_phy_channel(struct pl08x_driver_data *pl08x,
struct pl08x_phy_chan *ch)
{
- unsigned long flags;
+ ch->serving = NULL;
+}
+
+/*
+ * Try to allocate a physical channel. When successful, assign it to
+ * this virtual channel, and initiate the next descriptor. The
+ * virtual channel lock must be held at this point.
+ */
+static void pl08x_phy_alloc_and_start(struct pl08x_dma_chan *plchan)
+{
+ struct pl08x_driver_data *pl08x = plchan->host;
+ struct pl08x_phy_chan *ch;
- spin_lock_irqsave(&ch->lock, flags);
+ ch = pl08x_get_phy_channel(pl08x, plchan);
+ if (!ch) {
+ dev_dbg(&pl08x->adev->dev, "no physical channel available for xfer on %s\n", plchan->name);
+ plchan->state = PL08X_CHAN_WAITING;
+ return;
+ }
- /* Stop the channel and clear its interrupts */
- pl08x_terminate_phy_chan(pl08x, ch);
+ dev_dbg(&pl08x->adev->dev, "allocated physical channel %d for xfer on %s\n",
+ ch->id, plchan->name);
- pm_runtime_put(&pl08x->adev->dev);
+ plchan->phychan = ch;
+ plchan->state = PL08X_CHAN_RUNNING;
+ pl08x_start_next_txd(plchan);
+}
- /* Mark it as free */
- ch->serving = NULL;
- spin_unlock_irqrestore(&ch->lock, flags);
+static void pl08x_phy_reassign_start(struct pl08x_phy_chan *ch,
+ struct pl08x_dma_chan *plchan)
+{
+ struct pl08x_driver_data *pl08x = plchan->host;
+
+ dev_dbg(&pl08x->adev->dev, "reassigned physical channel %d for xfer on %s\n",
+ ch->id, plchan->name);
+
+ /*
+ * We do this without taking the lock; we're really only concerned
+ * about whether this pointer is NULL or not, and we're guaranteed
+ * that this will only be called when it _already_ is non-NULL.
+ */
+ ch->serving = plchan;
+ plchan->phychan = ch;
+ plchan->state = PL08X_CHAN_RUNNING;
+ pl08x_start_next_txd(plchan);
+}
+
+/*
+ * Free a physical DMA channel, potentially reallocating it to another
+ * virtual channel if we have any pending.
+ */
+static void pl08x_phy_free(struct pl08x_dma_chan *plchan)
+{
+ struct pl08x_driver_data *pl08x = plchan->host;
+ struct pl08x_dma_chan *p, *next;
+
+ retry:
+ next = NULL;
+
+ /* Find a waiting virtual channel for the next transfer. */
+ list_for_each_entry(p, &pl08x->memcpy.channels, vc.chan.device_node)
+ if (p->state == PL08X_CHAN_WAITING) {
+ next = p;
+ break;
+ }
+
+ if (!next) {
+ list_for_each_entry(p, &pl08x->slave.channels, vc.chan.device_node)
+ if (p->state == PL08X_CHAN_WAITING) {
+ next = p;
+ break;
+ }
+ }
+
+ /* Ensure that the physical channel is stopped */
+ pl08x_terminate_phy_chan(pl08x, plchan->phychan);
+
+ if (next) {
+ bool success;
+
+ /*
+ * Eww. We know this isn't going to deadlock
+ * but lockdep probably doesn't.
+ */
+ spin_lock(&next->vc.lock);
+ /* Re-check the state now that we have the lock */
+ success = next->state == PL08X_CHAN_WAITING;
+ if (success)
+ pl08x_phy_reassign_start(plchan->phychan, next);
+ spin_unlock(&next->vc.lock);
+
+ /* If the state changed, try to find another channel */
+ if (!success)
+ goto retry;
+ } else {
+ /* No more jobs, so free up the physical channel */
+ pl08x_put_phy_channel(pl08x, plchan->phychan);
+ }
+
+ plchan->phychan = NULL;
+ plchan->state = PL08X_CHAN_IDLE;
}
/*
@@ -585,8 +819,6 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
return 0;
}
- pl08x->pool_ctr++;
-
bd.txd = txd;
bd.lli_bus = (pl08x->lli_buses & PL08X_AHB2) ? PL080_LLI_LM_AHB2 : 0;
cctl = txd->cctl;
@@ -802,18 +1034,14 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
return num_llis;
}
-/* You should call this with the struct pl08x lock held */
static void pl08x_free_txd(struct pl08x_driver_data *pl08x,
struct pl08x_txd *txd)
{
struct pl08x_sg *dsg, *_dsg;
- /* Free the LLI */
if (txd->llis_va)
dma_pool_free(pl08x->pool, txd->llis_va, txd->llis_bus);
- pl08x->pool_ctr--;
-
list_for_each_entry_safe(dsg, _dsg, &txd->dsg_list, node) {
list_del(&dsg->node);
kfree(dsg);
@@ -822,133 +1050,75 @@ static void pl08x_free_txd(struct pl08x_driver_data *pl08x,
kfree(txd);
}
-static void pl08x_free_txd_list(struct pl08x_driver_data *pl08x,
- struct pl08x_dma_chan *plchan)
+static void pl08x_unmap_buffers(struct pl08x_txd *txd)
{
- struct pl08x_txd *txdi = NULL;
- struct pl08x_txd *next;
-
- if (!list_empty(&plchan->pend_list)) {
- list_for_each_entry_safe(txdi,
- next, &plchan->pend_list, node) {
- list_del(&txdi->node);
- pl08x_free_txd(pl08x, txdi);
+ struct device *dev = txd->vd.tx.chan->device->dev;
+ struct pl08x_sg *dsg;
+
+ if (!(txd->vd.tx.flags & DMA_COMPL_SKIP_SRC_UNMAP)) {
+ if (txd->vd.tx.flags & DMA_COMPL_SRC_UNMAP_SINGLE)
+ list_for_each_entry(dsg, &txd->dsg_list, node)
+ dma_unmap_single(dev, dsg->src_addr, dsg->len,
+ DMA_TO_DEVICE);
+ else {
+ list_for_each_entry(dsg, &txd->dsg_list, node)
+ dma_unmap_page(dev, dsg->src_addr, dsg->len,
+ DMA_TO_DEVICE);
}
}
+ if (!(txd->vd.tx.flags & DMA_COMPL_SKIP_DEST_UNMAP)) {
+ if (txd->vd.tx.flags & DMA_COMPL_DEST_UNMAP_SINGLE)
+ list_for_each_entry(dsg, &txd->dsg_list, node)
+ dma_unmap_single(dev, dsg->dst_addr, dsg->len,
+ DMA_FROM_DEVICE);
+ else
+ list_for_each_entry(dsg, &txd->dsg_list, node)
+ dma_unmap_page(dev, dsg->dst_addr, dsg->len,
+ DMA_FROM_DEVICE);
+ }
}
-/*
- * The DMA ENGINE API
- */
-static int pl08x_alloc_chan_resources(struct dma_chan *chan)
+static void pl08x_desc_free(struct virt_dma_desc *vd)
{
- return 0;
-}
+ struct pl08x_txd *txd = to_pl08x_txd(&vd->tx);
+ struct pl08x_dma_chan *plchan = to_pl08x_chan(vd->tx.chan);
-static void pl08x_free_chan_resources(struct dma_chan *chan)
-{
+ if (!plchan->slave)
+ pl08x_unmap_buffers(txd);
+
+ if (!txd->done)
+ pl08x_release_mux(plchan);
+
+ pl08x_free_txd(plchan->host, txd);
}
-/*
- * This should be called with the channel plchan->lock held
- */
-static int prep_phy_channel(struct pl08x_dma_chan *plchan,
- struct pl08x_txd *txd)
+static void pl08x_free_txd_list(struct pl08x_driver_data *pl08x,
+ struct pl08x_dma_chan *plchan)
{
- struct pl08x_driver_data *pl08x = plchan->host;
- struct pl08x_phy_chan *ch;
- int ret;
-
- /* Check if we already have a channel */
- if (plchan->phychan) {
- ch = plchan->phychan;
- goto got_channel;
- }
+ LIST_HEAD(head);
+ struct pl08x_txd *txd;
- ch = pl08x_get_phy_channel(pl08x, plchan);
- if (!ch) {
- /* No physical channel available, cope with it */
- dev_dbg(&pl08x->adev->dev, "no physical channel available for xfer on %s\n", plchan->name);
- return -EBUSY;
- }
+ vchan_get_all_descriptors(&plchan->vc, &head);
- /*
- * OK we have a physical channel: for memcpy() this is all we
- * need, but for slaves the physical signals may be muxed!
- * Can the platform allow us to use this channel?
- */
- if (plchan->slave && pl08x->pd->get_signal) {
- ret = pl08x->pd->get_signal(plchan);
- if (ret < 0) {
- dev_dbg(&pl08x->adev->dev,
- "unable to use physical channel %d for transfer on %s due to platform restrictions\n",
- ch->id, plchan->name);
- /* Release physical channel & return */
- pl08x_put_phy_channel(pl08x, ch);
- return -EBUSY;
- }
- ch->signal = ret;
+ while (!list_empty(&head)) {
+ txd = list_first_entry(&head, struct pl08x_txd, vd.node);
+ list_del(&txd->vd.node);
+ pl08x_desc_free(&txd->vd);
}
-
- plchan->phychan = ch;
- dev_dbg(&pl08x->adev->dev, "allocated physical channel %d and signal %d for xfer on %s\n",
- ch->id,
- ch->signal,
- plchan->name);
-
-got_channel:
- /* Assign the flow control signal to this channel */
- if (txd->direction == DMA_MEM_TO_DEV)
- txd->ccfg |= ch->signal << PL080_CONFIG_DST_SEL_SHIFT;
- else if (txd->direction == DMA_DEV_TO_MEM)
- txd->ccfg |= ch->signal << PL080_CONFIG_SRC_SEL_SHIFT;
-
- plchan->phychan_hold++;
-
- return 0;
}
-static void release_phy_channel(struct pl08x_dma_chan *plchan)
+/*
+ * The DMA ENGINE API
+ */
+static int pl08x_alloc_chan_resources(struct dma_chan *chan)
{
- struct pl08x_driver_data *pl08x = plchan->host;
-
- if ((plchan->phychan->signal >= 0) && pl08x->pd->put_signal) {
- pl08x->pd->put_signal(plchan);
- plchan->phychan->signal = -1;
- }
- pl08x_put_phy_channel(pl08x, plchan->phychan);
- plchan->phychan = NULL;
+ return 0;
}
-static dma_cookie_t pl08x_tx_submit(struct dma_async_tx_descriptor *tx)
+static void pl08x_free_chan_resources(struct dma_chan *chan)
{
- struct pl08x_dma_chan *plchan = to_pl08x_chan(tx->chan);
- struct pl08x_txd *txd = to_pl08x_txd(tx);
- unsigned long flags;
- dma_cookie_t cookie;
-
- spin_lock_irqsave(&plchan->lock, flags);
- cookie = dma_cookie_assign(tx);
-
- /* Put this onto the pending list */
- list_add_tail(&txd->node, &plchan->pend_list);
-
- /*
- * If there was no physical channel available for this memcpy,
- * stack the request up and indicate that the channel is waiting
- * for a free physical channel.
- */
- if (!plchan->slave && !plchan->phychan) {
- /* Do this memcpy whenever there is a channel ready */
- plchan->state = PL08X_CHAN_WAITING;
- plchan->waiting = txd;
- } else {
- plchan->phychan_hold--;
- }
-
- spin_unlock_irqrestore(&plchan->lock, flags);
-
- return cookie;
+ /* Ensure all queued descriptors are freed */
+ vchan_free_chan_resources(to_virt_chan(chan));
}
static struct dma_async_tx_descriptor *pl08x_prep_dma_interrupt(
@@ -968,23 +1138,53 @@ static enum dma_status pl08x_dma_tx_status(struct dma_chan *chan,
dma_cookie_t cookie, struct dma_tx_state *txstate)
{
struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
+ struct virt_dma_desc *vd;
+ unsigned long flags;
enum dma_status ret;
+ size_t bytes = 0;
ret = dma_cookie_status(chan, cookie, txstate);
if (ret == DMA_SUCCESS)
return ret;
/*
+ * There's no point calculating the residue if there's
+ * no txstate to store the value.
+ */
+ if (!txstate) {
+ if (plchan->state == PL08X_CHAN_PAUSED)
+ ret = DMA_PAUSED;
+ return ret;
+ }
+
+ spin_lock_irqsave(&plchan->vc.lock, flags);
+ ret = dma_cookie_status(chan, cookie, txstate);
+ if (ret != DMA_SUCCESS) {
+ vd = vchan_find_desc(&plchan->vc, cookie);
+ if (vd) {
+ /* On the issued list, so hasn't been processed yet */
+ struct pl08x_txd *txd = to_pl08x_txd(&vd->tx);
+ struct pl08x_sg *dsg;
+
+ list_for_each_entry(dsg, &txd->dsg_list, node)
+ bytes += dsg->len;
+ } else {
+ bytes = pl08x_getbytes_chan(plchan);
+ }
+ }
+ spin_unlock_irqrestore(&plchan->vc.lock, flags);
+
+ /*
* This cookie not complete yet
* Get number of bytes left in the active transactions and queue
*/
- dma_set_residue(txstate, pl08x_getbytes_chan(plchan));
+ dma_set_residue(txstate, bytes);
- if (plchan->state == PL08X_CHAN_PAUSED)
- return DMA_PAUSED;
+ if (plchan->state == PL08X_CHAN_PAUSED && ret == DMA_IN_PROGRESS)
+ ret = DMA_PAUSED;
/* Whether waiting or running, we're in progress */
- return DMA_IN_PROGRESS;
+ return ret;
}
/* PrimeCell DMA extension */
@@ -1080,38 +1280,14 @@ static u32 pl08x_burst(u32 maxburst)
return burst_sizes[i].reg;
}
-static int dma_set_runtime_config(struct dma_chan *chan,
- struct dma_slave_config *config)
+static u32 pl08x_get_cctl(struct pl08x_dma_chan *plchan,
+ enum dma_slave_buswidth addr_width, u32 maxburst)
{
- struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
- struct pl08x_driver_data *pl08x = plchan->host;
- enum dma_slave_buswidth addr_width;
- u32 width, burst, maxburst;
- u32 cctl = 0;
-
- if (!plchan->slave)
- return -EINVAL;
-
- /* Transfer direction */
- plchan->runtime_direction = config->direction;
- if (config->direction == DMA_MEM_TO_DEV) {
- addr_width = config->dst_addr_width;
- maxburst = config->dst_maxburst;
- } else if (config->direction == DMA_DEV_TO_MEM) {
- addr_width = config->src_addr_width;
- maxburst = config->src_maxburst;
- } else {
- dev_err(&pl08x->adev->dev,
- "bad runtime_config: alien transfer direction\n");
- return -EINVAL;
- }
+ u32 width, burst, cctl = 0;
width = pl08x_width(addr_width);
- if (width == ~0) {
- dev_err(&pl08x->adev->dev,
- "bad runtime_config: alien address width\n");
- return -EINVAL;
- }
+ if (width == ~0)
+ return ~0;
cctl |= width << PL080_CONTROL_SWIDTH_SHIFT;
cctl |= width << PL080_CONTROL_DWIDTH_SHIFT;
@@ -1128,28 +1304,23 @@ static int dma_set_runtime_config(struct dma_chan *chan,
cctl |= burst << PL080_CONTROL_SB_SIZE_SHIFT;
cctl |= burst << PL080_CONTROL_DB_SIZE_SHIFT;
- plchan->device_fc = config->device_fc;
+ return pl08x_cctl(cctl);
+}
- if (plchan->runtime_direction == DMA_DEV_TO_MEM) {
- plchan->src_addr = config->src_addr;
- plchan->src_cctl = pl08x_cctl(cctl) | PL080_CONTROL_DST_INCR |
- pl08x_select_bus(plchan->cd->periph_buses,
- pl08x->mem_buses);
- } else {
- plchan->dst_addr = config->dst_addr;
- plchan->dst_cctl = pl08x_cctl(cctl) | PL080_CONTROL_SRC_INCR |
- pl08x_select_bus(pl08x->mem_buses,
- plchan->cd->periph_buses);
- }
+static int dma_set_runtime_config(struct dma_chan *chan,
+ struct dma_slave_config *config)
+{
+ struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
- dev_dbg(&pl08x->adev->dev,
- "configured channel %s (%s) for %s, data width %d, "
- "maxburst %d words, LE, CCTL=0x%08x\n",
- dma_chan_name(chan), plchan->name,
- (config->direction == DMA_DEV_TO_MEM) ? "RX" : "TX",
- addr_width,
- maxburst,
- cctl);
+ if (!plchan->slave)
+ return -EINVAL;
+
+ /* Reject definitely invalid configurations */
+ if (config->src_addr_width == DMA_SLAVE_BUSWIDTH_8_BYTES ||
+ config->dst_addr_width == DMA_SLAVE_BUSWIDTH_8_BYTES)
+ return -EINVAL;
+
+ plchan->cfg = *config;
return 0;
}
@@ -1163,95 +1334,19 @@ static void pl08x_issue_pending(struct dma_chan *chan)
struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
unsigned long flags;
- spin_lock_irqsave(&plchan->lock, flags);
- /* Something is already active, or we're waiting for a channel... */
- if (plchan->at || plchan->state == PL08X_CHAN_WAITING) {
- spin_unlock_irqrestore(&plchan->lock, flags);
- return;
- }
-
- /* Take the first element in the queue and execute it */
- if (!list_empty(&plchan->pend_list)) {
- struct pl08x_txd *next;
-
- next = list_first_entry(&plchan->pend_list,
- struct pl08x_txd,
- node);
- list_del(&next->node);
- plchan->state = PL08X_CHAN_RUNNING;
-
- pl08x_start_txd(plchan, next);
+ spin_lock_irqsave(&plchan->vc.lock, flags);
+ if (vchan_issue_pending(&plchan->vc)) {
+ if (!plchan->phychan && plchan->state != PL08X_CHAN_WAITING)
+ pl08x_phy_alloc_and_start(plchan);
}
-
- spin_unlock_irqrestore(&plchan->lock, flags);
-}
-
-static int pl08x_prep_channel_resources(struct pl08x_dma_chan *plchan,
- struct pl08x_txd *txd)
-{
- struct pl08x_driver_data *pl08x = plchan->host;
- unsigned long flags;
- int num_llis, ret;
-
- num_llis = pl08x_fill_llis_for_desc(pl08x, txd);
- if (!num_llis) {
- spin_lock_irqsave(&plchan->lock, flags);
- pl08x_free_txd(pl08x, txd);
- spin_unlock_irqrestore(&plchan->lock, flags);
- return -EINVAL;
- }
-
- spin_lock_irqsave(&plchan->lock, flags);
-
- /*
- * See if we already have a physical channel allocated,
- * else this is the time to try to get one.
- */
- ret = prep_phy_channel(plchan, txd);
- if (ret) {
- /*
- * No physical channel was available.
- *
- * memcpy transfers can be sorted out at submission time.
- *
- * Slave transfers may have been denied due to platform
- * channel muxing restrictions. Since there is no guarantee
- * that this will ever be resolved, and the signal must be
- * acquired AFTER acquiring the physical channel, we will let
- * them be NACK:ed with -EBUSY here. The drivers can retry
- * the prep() call if they are eager on doing this using DMA.
- */
- if (plchan->slave) {
- pl08x_free_txd_list(pl08x, plchan);
- pl08x_free_txd(pl08x, txd);
- spin_unlock_irqrestore(&plchan->lock, flags);
- return -EBUSY;
- }
- } else
- /*
- * Else we're all set, paused and ready to roll, status
- * will switch to PL08X_CHAN_RUNNING when we call
- * issue_pending(). If there is something running on the
- * channel already we don't change its state.
- */
- if (plchan->state == PL08X_CHAN_IDLE)
- plchan->state = PL08X_CHAN_PAUSED;
-
- spin_unlock_irqrestore(&plchan->lock, flags);
-
- return 0;
+ spin_unlock_irqrestore(&plchan->vc.lock, flags);
}
-static struct pl08x_txd *pl08x_get_txd(struct pl08x_dma_chan *plchan,
- unsigned long flags)
+static struct pl08x_txd *pl08x_get_txd(struct pl08x_dma_chan *plchan)
{
struct pl08x_txd *txd = kzalloc(sizeof(*txd), GFP_NOWAIT);
if (txd) {
- dma_async_tx_descriptor_init(&txd->tx, &plchan->chan);
- txd->tx.flags = flags;
- txd->tx.tx_submit = pl08x_tx_submit;
- INIT_LIST_HEAD(&txd->node);
INIT_LIST_HEAD(&txd->dsg_list);
/* Always enable error and terminal interrupts */
@@ -1274,7 +1369,7 @@ static struct dma_async_tx_descriptor *pl08x_prep_dma_memcpy(
struct pl08x_sg *dsg;
int ret;
- txd = pl08x_get_txd(plchan, flags);
+ txd = pl08x_get_txd(plchan);
if (!txd) {
dev_err(&pl08x->adev->dev,
"%s no memory for descriptor\n", __func__);
@@ -1290,14 +1385,13 @@ static struct dma_async_tx_descriptor *pl08x_prep_dma_memcpy(
}
list_add_tail(&dsg->node, &txd->dsg_list);
- txd->direction = DMA_NONE;
dsg->src_addr = src;
dsg->dst_addr = dest;
dsg->len = len;
/* Set platform data for m2m */
txd->ccfg |= PL080_FLOW_MEM2MEM << PL080_CONFIG_FLOW_CONTROL_SHIFT;
- txd->cctl = pl08x->pd->memcpy_channel.cctl &
+ txd->cctl = pl08x->pd->memcpy_channel.cctl_memcpy &
~(PL080_CONTROL_DST_AHB2 | PL080_CONTROL_SRC_AHB2);
/* Both to be incremented or the code will break */
@@ -1307,11 +1401,13 @@ static struct dma_async_tx_descriptor *pl08x_prep_dma_memcpy(
txd->cctl |= pl08x_select_bus(pl08x->mem_buses,
pl08x->mem_buses);
- ret = pl08x_prep_channel_resources(plchan, txd);
- if (ret)
+ ret = pl08x_fill_llis_for_desc(plchan->host, txd);
+ if (!ret) {
+ pl08x_free_txd(pl08x, txd);
return NULL;
+ }
- return &txd->tx;
+ return vchan_tx_prep(&plchan->vc, &txd->vd, flags);
}
static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
@@ -1324,36 +1420,40 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
struct pl08x_txd *txd;
struct pl08x_sg *dsg;
struct scatterlist *sg;
+ enum dma_slave_buswidth addr_width;
dma_addr_t slave_addr;
int ret, tmp;
+ u8 src_buses, dst_buses;
+ u32 maxburst, cctl;
dev_dbg(&pl08x->adev->dev, "%s prepare transaction of %d bytes from %s\n",
__func__, sg_dma_len(sgl), plchan->name);
- txd = pl08x_get_txd(plchan, flags);
+ txd = pl08x_get_txd(plchan);
if (!txd) {
dev_err(&pl08x->adev->dev, "%s no txd\n", __func__);
return NULL;
}
- if (direction != plchan->runtime_direction)
- dev_err(&pl08x->adev->dev, "%s DMA setup does not match "
- "the direction configured for the PrimeCell\n",
- __func__);
-
/*
* Set up addresses, the PrimeCell configured address
* will take precedence since this may configure the
* channel target address dynamically at runtime.
*/
- txd->direction = direction;
-
if (direction == DMA_MEM_TO_DEV) {
- txd->cctl = plchan->dst_cctl;
- slave_addr = plchan->dst_addr;
+ cctl = PL080_CONTROL_SRC_INCR;
+ slave_addr = plchan->cfg.dst_addr;
+ addr_width = plchan->cfg.dst_addr_width;
+ maxburst = plchan->cfg.dst_maxburst;
+ src_buses = pl08x->mem_buses;
+ dst_buses = plchan->cd->periph_buses;
} else if (direction == DMA_DEV_TO_MEM) {
- txd->cctl = plchan->src_cctl;
- slave_addr = plchan->src_addr;
+ cctl = PL080_CONTROL_DST_INCR;
+ slave_addr = plchan->cfg.src_addr;
+ addr_width = plchan->cfg.src_addr_width;
+ maxburst = plchan->cfg.src_maxburst;
+ src_buses = plchan->cd->periph_buses;
+ dst_buses = pl08x->mem_buses;
} else {
pl08x_free_txd(pl08x, txd);
dev_err(&pl08x->adev->dev,
@@ -1361,7 +1461,17 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
return NULL;
}
- if (plchan->device_fc)
+ cctl |= pl08x_get_cctl(plchan, addr_width, maxburst);
+ if (cctl == ~0) {
+ pl08x_free_txd(pl08x, txd);
+ dev_err(&pl08x->adev->dev,
+ "DMA slave configuration botched?\n");
+ return NULL;
+ }
+
+ txd->cctl = cctl | pl08x_select_bus(src_buses, dst_buses);
+
+ if (plchan->cfg.device_fc)
tmp = (direction == DMA_MEM_TO_DEV) ? PL080_FLOW_MEM2PER_PER :
PL080_FLOW_PER2MEM_PER;
else
@@ -1370,9 +1480,28 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
txd->ccfg |= tmp << PL080_CONFIG_FLOW_CONTROL_SHIFT;
+ ret = pl08x_request_mux(plchan);
+ if (ret < 0) {
+ pl08x_free_txd(pl08x, txd);
+ dev_dbg(&pl08x->adev->dev,
+ "unable to mux for transfer on %s due to platform restrictions\n",
+ plchan->name);
+ return NULL;
+ }
+
+ dev_dbg(&pl08x->adev->dev, "allocated DMA request signal %d for xfer on %s\n",
+ plchan->signal, plchan->name);
+
+ /* Assign the flow control signal to this channel */
+ if (direction == DMA_MEM_TO_DEV)
+ txd->ccfg |= plchan->signal << PL080_CONFIG_DST_SEL_SHIFT;
+ else
+ txd->ccfg |= plchan->signal << PL080_CONFIG_SRC_SEL_SHIFT;
+
for_each_sg(sgl, sg, sg_len, tmp) {
dsg = kzalloc(sizeof(struct pl08x_sg), GFP_NOWAIT);
if (!dsg) {
+ pl08x_release_mux(plchan);
pl08x_free_txd(pl08x, txd);
dev_err(&pl08x->adev->dev, "%s no mem for pl080 sg\n",
__func__);
@@ -1390,11 +1519,14 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
}
}
- ret = pl08x_prep_channel_resources(plchan, txd);
- if (ret)
+ ret = pl08x_fill_llis_for_desc(plchan->host, txd);
+ if (!ret) {
+ pl08x_release_mux(plchan);
+ pl08x_free_txd(pl08x, txd);
return NULL;
+ }
- return &txd->tx;
+ return vchan_tx_prep(&plchan->vc, &txd->vd, flags);
}
static int pl08x_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
@@ -1415,9 +1547,9 @@ static int pl08x_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
* Anything succeeds on channels with no physical allocation and
* no queued transfers.
*/
- spin_lock_irqsave(&plchan->lock, flags);
+ spin_lock_irqsave(&plchan->vc.lock, flags);
if (!plchan->phychan && !plchan->at) {
- spin_unlock_irqrestore(&plchan->lock, flags);
+ spin_unlock_irqrestore(&plchan->vc.lock, flags);
return 0;
}
@@ -1426,18 +1558,15 @@ static int pl08x_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
plchan->state = PL08X_CHAN_IDLE;
if (plchan->phychan) {
- pl08x_terminate_phy_chan(pl08x, plchan->phychan);
-
/*
* Mark physical channel as free and free any slave
* signal
*/
- release_phy_channel(plchan);
- plchan->phychan_hold = 0;
+ pl08x_phy_free(plchan);
}
/* Dequeue jobs and free LLIs */
if (plchan->at) {
- pl08x_free_txd(pl08x, plchan->at);
+ pl08x_desc_free(&plchan->at->vd);
plchan->at = NULL;
}
/* Dequeue jobs not yet fired as well */
@@ -1457,7 +1586,7 @@ static int pl08x_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
break;
}
- spin_unlock_irqrestore(&plchan->lock, flags);
+ spin_unlock_irqrestore(&plchan->vc.lock, flags);
return ret;
}
@@ -1494,123 +1623,6 @@ static void pl08x_ensure_on(struct pl08x_driver_data *pl08x)
writel(PL080_CONFIG_ENABLE, pl08x->base + PL080_CONFIG);
}
-static void pl08x_unmap_buffers(struct pl08x_txd *txd)
-{
- struct device *dev = txd->tx.chan->device->dev;
- struct pl08x_sg *dsg;
-
- if (!(txd->tx.flags & DMA_COMPL_SKIP_SRC_UNMAP)) {
- if (txd->tx.flags & DMA_COMPL_SRC_UNMAP_SINGLE)
- list_for_each_entry(dsg, &txd->dsg_list, node)
- dma_unmap_single(dev, dsg->src_addr, dsg->len,
- DMA_TO_DEVICE);
- else {
- list_for_each_entry(dsg, &txd->dsg_list, node)
- dma_unmap_page(dev, dsg->src_addr, dsg->len,
- DMA_TO_DEVICE);
- }
- }
- if (!(txd->tx.flags & DMA_COMPL_SKIP_DEST_UNMAP)) {
- if (txd->tx.flags & DMA_COMPL_DEST_UNMAP_SINGLE)
- list_for_each_entry(dsg, &txd->dsg_list, node)
- dma_unmap_single(dev, dsg->dst_addr, dsg->len,
- DMA_FROM_DEVICE);
- else
- list_for_each_entry(dsg, &txd->dsg_list, node)
- dma_unmap_page(dev, dsg->dst_addr, dsg->len,
- DMA_FROM_DEVICE);
- }
-}
-
-static void pl08x_tasklet(unsigned long data)
-{
- struct pl08x_dma_chan *plchan = (struct pl08x_dma_chan *) data;
- struct pl08x_driver_data *pl08x = plchan->host;
- struct pl08x_txd *txd;
- unsigned long flags;
-
- spin_lock_irqsave(&plchan->lock, flags);
-
- txd = plchan->at;
- plchan->at = NULL;
-
- if (txd) {
- /* Update last completed */
- dma_cookie_complete(&txd->tx);
- }
-
- /* If a new descriptor is queued, set it up plchan->at is NULL here */
- if (!list_empty(&plchan->pend_list)) {
- struct pl08x_txd *next;
-
- next = list_first_entry(&plchan->pend_list,
- struct pl08x_txd,
- node);
- list_del(&next->node);
-
- pl08x_start_txd(plchan, next);
- } else if (plchan->phychan_hold) {
- /*
- * This channel is still in use - we have a new txd being
- * prepared and will soon be queued. Don't give up the
- * physical channel.
- */
- } else {
- struct pl08x_dma_chan *waiting = NULL;
-
- /*
- * No more jobs, so free up the physical channel
- * Free any allocated signal on slave transfers too
- */
- release_phy_channel(plchan);
- plchan->state = PL08X_CHAN_IDLE;
-
- /*
- * And NOW before anyone else can grab that free:d up
- * physical channel, see if there is some memcpy pending
- * that seriously needs to start because of being stacked
- * up while we were choking the physical channels with data.
- */
- list_for_each_entry(waiting, &pl08x->memcpy.channels,
- chan.device_node) {
- if (waiting->state == PL08X_CHAN_WAITING &&
- waiting->waiting != NULL) {
- int ret;
-
- /* This should REALLY not fail now */
- ret = prep_phy_channel(waiting,
- waiting->waiting);
- BUG_ON(ret);
- waiting->phychan_hold--;
- waiting->state = PL08X_CHAN_RUNNING;
- waiting->waiting = NULL;
- pl08x_issue_pending(&waiting->chan);
- break;
- }
- }
- }
-
- spin_unlock_irqrestore(&plchan->lock, flags);
-
- if (txd) {
- dma_async_tx_callback callback = txd->tx.callback;
- void *callback_param = txd->tx.callback_param;
-
- /* Don't try to unmap buffers on slave channels */
- if (!plchan->slave)
- pl08x_unmap_buffers(txd);
-
- /* Free the descriptor */
- spin_lock_irqsave(&plchan->lock, flags);
- pl08x_free_txd(pl08x, txd);
- spin_unlock_irqrestore(&plchan->lock, flags);
-
- /* Callback to signal completion */
- if (callback)
- callback(callback_param);
- }
-}
-
static irqreturn_t pl08x_irq(int irq, void *dev)
{
struct pl08x_driver_data *pl08x = dev;
@@ -1635,6 +1647,7 @@ static irqreturn_t pl08x_irq(int irq, void *dev)
/* Locate physical channel */
struct pl08x_phy_chan *phychan = &pl08x->phy_chans[i];
struct pl08x_dma_chan *plchan = phychan->serving;
+ struct pl08x_txd *tx;
if (!plchan) {
dev_err(&pl08x->adev->dev,
@@ -1643,8 +1656,29 @@ static irqreturn_t pl08x_irq(int irq, void *dev)
continue;
}
- /* Schedule tasklet on this channel */
- tasklet_schedule(&plchan->tasklet);
+ spin_lock(&plchan->vc.lock);
+ tx = plchan->at;
+ if (tx) {
+ plchan->at = NULL;
+ /*
+ * This descriptor is done, release its mux
+ * reservation.
+ */
+ pl08x_release_mux(plchan);
+ tx->done = true;
+ vchan_cookie_complete(&tx->vd);
+
+ /*
+ * And start the next descriptor (if any),
+ * otherwise free this channel.
+ */
+ if (vchan_next_desc(&plchan->vc))
+ pl08x_start_next_txd(plchan);
+ else
+ pl08x_phy_free(plchan);
+ }
+ spin_unlock(&plchan->vc.lock);
+
mask |= (1 << i);
}
}
@@ -1654,16 +1688,10 @@ static irqreturn_t pl08x_irq(int irq, void *dev)
static void pl08x_dma_slave_init(struct pl08x_dma_chan *chan)
{
- u32 cctl = pl08x_cctl(chan->cd->cctl);
-
chan->slave = true;
chan->name = chan->cd->bus_id;
- chan->src_addr = chan->cd->addr;
- chan->dst_addr = chan->cd->addr;
- chan->src_cctl = cctl | PL080_CONTROL_DST_INCR |
- pl08x_select_bus(chan->cd->periph_buses, chan->host->mem_buses);
- chan->dst_cctl = cctl | PL080_CONTROL_SRC_INCR |
- pl08x_select_bus(chan->host->mem_buses, chan->cd->periph_buses);
+ chan->cfg.src_addr = chan->cd->addr;
+ chan->cfg.dst_addr = chan->cd->addr;
}
/*
@@ -1693,6 +1721,7 @@ static int pl08x_dma_init_virtual_channels(struct pl08x_driver_data *pl08x,
chan->host = pl08x;
chan->state = PL08X_CHAN_IDLE;
+ chan->signal = -1;
if (slave) {
chan->cd = &pl08x->pd->slave_channels[i];
@@ -1705,26 +1734,12 @@ static int pl08x_dma_init_virtual_channels(struct pl08x_driver_data *pl08x,
return -ENOMEM;
}
}
- if (chan->cd->circular_buffer) {
- dev_err(&pl08x->adev->dev,
- "channel %s: circular buffers not supported\n",
- chan->name);
- kfree(chan);
- continue;
- }
dev_dbg(&pl08x->adev->dev,
"initialize virtual channel \"%s\"\n",
chan->name);
- chan->chan.device = dmadev;
- dma_cookie_init(&chan->chan);
-
- spin_lock_init(&chan->lock);
- INIT_LIST_HEAD(&chan->pend_list);
- tasklet_init(&chan->tasklet, pl08x_tasklet,
- (unsigned long) chan);
-
- list_add_tail(&chan->chan.device_node, &dmadev->channels);
+ chan->vc.desc_free = pl08x_desc_free;
+ vchan_init(&chan->vc, dmadev);
}
dev_info(&pl08x->adev->dev, "initialized %d virtual %s channels\n",
i, slave ? "slave" : "memcpy");
@@ -1737,8 +1752,8 @@ static void pl08x_free_virtual_channels(struct dma_device *dmadev)
struct pl08x_dma_chan *next;
list_for_each_entry_safe(chan,
- next, &dmadev->channels, chan.device_node) {
- list_del(&chan->chan.device_node);
+ next, &dmadev->channels, vc.chan.device_node) {
+ list_del(&chan->vc.chan.device_node);
kfree(chan);
}
}
@@ -1791,7 +1806,7 @@ static int pl08x_debugfs_show(struct seq_file *s, void *data)
seq_printf(s, "\nPL08x virtual memcpy channels:\n");
seq_printf(s, "CHANNEL:\tSTATE:\n");
seq_printf(s, "--------\t------\n");
- list_for_each_entry(chan, &pl08x->memcpy.channels, chan.device_node) {
+ list_for_each_entry(chan, &pl08x->memcpy.channels, vc.chan.device_node) {
seq_printf(s, "%s\t\t%s\n", chan->name,
pl08x_state_str(chan->state));
}
@@ -1799,7 +1814,7 @@ static int pl08x_debugfs_show(struct seq_file *s, void *data)
seq_printf(s, "\nPL08x virtual slave channels:\n");
seq_printf(s, "CHANNEL:\tSTATE:\n");
seq_printf(s, "--------\t------\n");
- list_for_each_entry(chan, &pl08x->slave.channels, chan.device_node) {
+ list_for_each_entry(chan, &pl08x->slave.channels, vc.chan.device_node) {
seq_printf(s, "%s\t\t%s\n", chan->name,
pl08x_state_str(chan->state));
}
@@ -1851,9 +1866,6 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
goto out_no_pl08x;
}
- pm_runtime_set_active(&adev->dev);
- pm_runtime_enable(&adev->dev);
-
/* Initialize memcpy engine */
dma_cap_set(DMA_MEMCPY, pl08x->memcpy.cap_mask);
pl08x->memcpy.dev = &adev->dev;
@@ -1903,8 +1915,6 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
goto out_no_lli_pool;
}
- spin_lock_init(&pl08x->lock);
-
pl08x->base = ioremap(adev->res.start, resource_size(&adev->res));
if (!pl08x->base) {
ret = -ENOMEM;
@@ -1942,7 +1952,6 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
ch->id = i;
ch->base = pl08x->base + PL080_Cx_BASE(i);
spin_lock_init(&ch->lock);
- ch->signal = -1;
/*
* Nomadik variants can have channels that are locked
@@ -2007,7 +2016,6 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
amba_part(adev), amba_rev(adev),
(unsigned long long)adev->res.start, adev->irq[0]);
- pm_runtime_put(&adev->dev);
return 0;
out_no_slave_reg:
@@ -2026,9 +2034,6 @@ out_no_ioremap:
dma_pool_destroy(pl08x->pool);
out_no_lli_pool:
out_no_platdata:
- pm_runtime_put(&adev->dev);
- pm_runtime_disable(&adev->dev);
-
kfree(pl08x);
out_no_pl08x:
amba_release_regions(adev);
diff --git a/drivers/dma/sa11x0-dma.c b/drivers/dma/sa11x0-dma.c
index 5f1d2e670837..f5a73606217e 100644
--- a/drivers/dma/sa11x0-dma.c
+++ b/drivers/dma/sa11x0-dma.c
@@ -78,6 +78,8 @@ struct sa11x0_dma_desc {
u32 ddar;
size_t size;
+ unsigned period;
+ bool cyclic;
unsigned sglen;
struct sa11x0_dma_sg sg[0];
@@ -178,19 +180,24 @@ static void noinline sa11x0_dma_start_sg(struct sa11x0_dma_phy *p,
return;
if (p->sg_load == txd->sglen) {
- struct sa11x0_dma_desc *txn = sa11x0_dma_next_desc(c);
+ if (!txd->cyclic) {
+ struct sa11x0_dma_desc *txn = sa11x0_dma_next_desc(c);
- /*
- * We have reached the end of the current descriptor.
- * Peek at the next descriptor, and if compatible with
- * the current, start processing it.
- */
- if (txn && txn->ddar == txd->ddar) {
- txd = txn;
- sa11x0_dma_start_desc(p, txn);
+ /*
+ * We have reached the end of the current descriptor.
+ * Peek at the next descriptor, and if compatible with
+ * the current, start processing it.
+ */
+ if (txn && txn->ddar == txd->ddar) {
+ txd = txn;
+ sa11x0_dma_start_desc(p, txn);
+ } else {
+ p->txd_load = NULL;
+ return;
+ }
} else {
- p->txd_load = NULL;
- return;
+ /* Cyclic: reset back to beginning */
+ p->sg_load = 0;
}
}
@@ -224,13 +231,21 @@ static void noinline sa11x0_dma_complete(struct sa11x0_dma_phy *p,
struct sa11x0_dma_desc *txd = p->txd_done;
if (++p->sg_done == txd->sglen) {
- vchan_cookie_complete(&txd->vd);
+ if (!txd->cyclic) {
+ vchan_cookie_complete(&txd->vd);
- p->sg_done = 0;
- p->txd_done = p->txd_load;
+ p->sg_done = 0;
+ p->txd_done = p->txd_load;
- if (!p->txd_done)
- tasklet_schedule(&p->dev->task);
+ if (!p->txd_done)
+ tasklet_schedule(&p->dev->task);
+ } else {
+ if ((p->sg_done % txd->period) == 0)
+ vchan_cyclic_callback(&txd->vd);
+
+ /* Cyclic: reset back to beginning */
+ p->sg_done = 0;
+ }
}
sa11x0_dma_start_sg(p, c);
@@ -416,27 +431,47 @@ static enum dma_status sa11x0_dma_tx_status(struct dma_chan *chan,
struct sa11x0_dma_chan *c = to_sa11x0_dma_chan(chan);
struct sa11x0_dma_dev *d = to_sa11x0_dma(chan->device);
struct sa11x0_dma_phy *p;
- struct sa11x0_dma_desc *txd;
+ struct virt_dma_desc *vd;
unsigned long flags;
enum dma_status ret;
- size_t bytes = 0;
ret = dma_cookie_status(&c->vc.chan, cookie, state);
if (ret == DMA_SUCCESS)
return ret;
+ if (!state)
+ return c->status;
+
spin_lock_irqsave(&c->vc.lock, flags);
p = c->phy;
- ret = c->status;
- if (p) {
- dma_addr_t addr = sa11x0_dma_pos(p);
- dev_vdbg(d->slave.dev, "tx_status: addr:%x\n", addr);
+ /*
+ * If the cookie is on our issue queue, then the residue is
+ * its total size.
+ */
+ vd = vchan_find_desc(&c->vc, cookie);
+ if (vd) {
+ state->residue = container_of(vd, struct sa11x0_dma_desc, vd)->size;
+ } else if (!p) {
+ state->residue = 0;
+ } else {
+ struct sa11x0_dma_desc *txd;
+ size_t bytes = 0;
- txd = p->txd_done;
+ if (p->txd_done && p->txd_done->vd.tx.cookie == cookie)
+ txd = p->txd_done;
+ else if (p->txd_load && p->txd_load->vd.tx.cookie == cookie)
+ txd = p->txd_load;
+ else
+ txd = NULL;
+
+ ret = c->status;
if (txd) {
+ dma_addr_t addr = sa11x0_dma_pos(p);
unsigned i;
+ dev_vdbg(d->slave.dev, "tx_status: addr:%x\n", addr);
+
for (i = 0; i < txd->sglen; i++) {
dev_vdbg(d->slave.dev, "tx_status: [%u] %x+%x\n",
i, txd->sg[i].addr, txd->sg[i].len);
@@ -459,18 +494,11 @@ static enum dma_status sa11x0_dma_tx_status(struct dma_chan *chan,
bytes += txd->sg[i].len;
}
}
- if (txd != p->txd_load && p->txd_load)
- bytes += p->txd_load->size;
- }
- list_for_each_entry(txd, &c->vc.desc_issued, vd.node) {
- bytes += txd->size;
+ state->residue = bytes;
}
spin_unlock_irqrestore(&c->vc.lock, flags);
- if (state)
- state->residue = bytes;
-
- dev_vdbg(d->slave.dev, "tx_status: bytes 0x%zx\n", bytes);
+ dev_vdbg(d->slave.dev, "tx_status: bytes 0x%zx\n", state->residue);
return ret;
}
@@ -584,6 +612,65 @@ static struct dma_async_tx_descriptor *sa11x0_dma_prep_slave_sg(
return vchan_tx_prep(&c->vc, &txd->vd, flags);
}
+static struct dma_async_tx_descriptor *sa11x0_dma_prep_dma_cyclic(
+ struct dma_chan *chan, dma_addr_t addr, size_t size, size_t period,
+ enum dma_transfer_direction dir, void *context)
+{
+ struct sa11x0_dma_chan *c = to_sa11x0_dma_chan(chan);
+ struct sa11x0_dma_desc *txd;
+ unsigned i, j, k, sglen, sgperiod;
+
+ /* SA11x0 channels can only operate in their native direction */
+ if (dir != (c->ddar & DDAR_RW ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV)) {
+ dev_err(chan->device->dev, "vchan %p: bad DMA direction: DDAR:%08x dir:%u\n",
+ &c->vc, c->ddar, dir);
+ return NULL;
+ }
+
+ sgperiod = DIV_ROUND_UP(period, DMA_MAX_SIZE & ~DMA_ALIGN);
+ sglen = size * sgperiod / period;
+
+ /* Do not allow zero-sized txds */
+ if (sglen == 0)
+ return NULL;
+
+ txd = kzalloc(sizeof(*txd) + sglen * sizeof(txd->sg[0]), GFP_ATOMIC);
+ if (!txd) {
+ dev_dbg(chan->device->dev, "vchan %p: kzalloc failed\n", &c->vc);
+ return NULL;
+ }
+
+ for (i = k = 0; i < size / period; i++) {
+ size_t tlen, len = period;
+
+ for (j = 0; j < sgperiod; j++, k++) {
+ tlen = len;
+
+ if (tlen > DMA_MAX_SIZE) {
+ unsigned mult = DIV_ROUND_UP(tlen, DMA_MAX_SIZE & ~DMA_ALIGN);
+ tlen = (tlen / mult) & ~DMA_ALIGN;
+ }
+
+ txd->sg[k].addr = addr;
+ txd->sg[k].len = tlen;
+ addr += tlen;
+ len -= tlen;
+ }
+
+ WARN_ON(len != 0);
+ }
+
+ WARN_ON(k != sglen);
+
+ txd->ddar = c->ddar;
+ txd->size = size;
+ txd->sglen = sglen;
+ txd->cyclic = 1;
+ txd->period = sgperiod;
+
+ return vchan_tx_prep(&c->vc, &txd->vd, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+}
+
static int sa11x0_dma_slave_config(struct sa11x0_dma_chan *c, struct dma_slave_config *cfg)
{
u32 ddar = c->ddar & ((0xf << 4) | DDAR_RW);
@@ -854,7 +941,9 @@ static int __devinit sa11x0_dma_probe(struct platform_device *pdev)
}
dma_cap_set(DMA_SLAVE, d->slave.cap_mask);
+ dma_cap_set(DMA_CYCLIC, d->slave.cap_mask);
d->slave.device_prep_slave_sg = sa11x0_dma_prep_slave_sg;
+ d->slave.device_prep_dma_cyclic = sa11x0_dma_prep_dma_cyclic;
ret = sa11x0_dma_init_dmadev(&d->slave, &pdev->dev);
if (ret) {
dev_warn(d->slave.dev, "failed to register slave async device: %d\n",
diff --git a/include/linux/amba/pl08x.h b/include/linux/amba/pl08x.h
index 02549017212a..2a5f64a11b77 100644
--- a/include/linux/amba/pl08x.h
+++ b/include/linux/amba/pl08x.h
@@ -21,8 +21,9 @@
#include <linux/dmaengine.h>
#include <linux/interrupt.h>
-struct pl08x_lli;
struct pl08x_driver_data;
+struct pl08x_phy_chan;
+struct pl08x_txd;
/* Bitmasks for selecting AHB ports for DMA transfers */
enum {
@@ -46,170 +47,29 @@ enum {
* devices with static assignments
* @muxval: a number usually used to poke into some mux regiser to
* mux in the signal to this channel
- * @cctl_opt: default options for the channel control register
+ * @cctl_memcpy: options for the channel control register for memcpy
+ * *** not used for slave channels ***
* @addr: source/target address in physical memory for this DMA channel,
* can be the address of a FIFO register for burst requests for example.
* This can be left undefined if the PrimeCell API is used for configuring
* this.
- * @circular_buffer: whether the buffer passed in is circular and
- * shall simply be looped round round (like a record baby round
- * round round round)
* @single: the device connected to this channel will request single DMA
* transfers, not bursts. (Bursts are default.)
* @periph_buses: the device connected to this channel is accessible via
* these buses (use PL08X_AHB1 | PL08X_AHB2).
*/
struct pl08x_channel_data {
- char *bus_id;
+ const char *bus_id;
int min_signal;
int max_signal;
u32 muxval;
- u32 cctl;
+ u32 cctl_memcpy;
dma_addr_t addr;
- bool circular_buffer;
bool single;
u8 periph_buses;
};
/**
- * Struct pl08x_bus_data - information of source or destination
- * busses for a transfer
- * @addr: current address
- * @maxwidth: the maximum width of a transfer on this bus
- * @buswidth: the width of this bus in bytes: 1, 2 or 4
- */
-struct pl08x_bus_data {
- dma_addr_t addr;
- u8 maxwidth;
- u8 buswidth;
-};
-
-/**
- * struct pl08x_phy_chan - holder for the physical channels
- * @id: physical index to this channel
- * @lock: a lock to use when altering an instance of this struct
- * @signal: the physical signal (aka channel) serving this physical channel
- * right now
- * @serving: the virtual channel currently being served by this physical
- * channel
- * @locked: channel unavailable for the system, e.g. dedicated to secure
- * world
- */
-struct pl08x_phy_chan {
- unsigned int id;
- void __iomem *base;
- spinlock_t lock;
- int signal;
- struct pl08x_dma_chan *serving;
- bool locked;
-};
-
-/**
- * struct pl08x_sg - structure containing data per sg
- * @src_addr: src address of sg
- * @dst_addr: dst address of sg
- * @len: transfer len in bytes
- * @node: node for txd's dsg_list
- */
-struct pl08x_sg {
- dma_addr_t src_addr;
- dma_addr_t dst_addr;
- size_t len;
- struct list_head node;
-};
-
-/**
- * struct pl08x_txd - wrapper for struct dma_async_tx_descriptor
- * @tx: async tx descriptor
- * @node: node for txd list for channels
- * @dsg_list: list of children sg's
- * @direction: direction of transfer
- * @llis_bus: DMA memory address (physical) start for the LLIs
- * @llis_va: virtual memory address start for the LLIs
- * @cctl: control reg values for current txd
- * @ccfg: config reg values for current txd
- */
-struct pl08x_txd {
- struct dma_async_tx_descriptor tx;
- struct list_head node;
- struct list_head dsg_list;
- enum dma_transfer_direction direction;
- dma_addr_t llis_bus;
- struct pl08x_lli *llis_va;
- /* Default cctl value for LLIs */
- u32 cctl;
- /*
- * Settings to be put into the physical channel when we
- * trigger this txd. Other registers are in llis_va[0].
- */
- u32 ccfg;
-};
-
-/**
- * struct pl08x_dma_chan_state - holds the PL08x specific virtual channel
- * states
- * @PL08X_CHAN_IDLE: the channel is idle
- * @PL08X_CHAN_RUNNING: the channel has allocated a physical transport
- * channel and is running a transfer on it
- * @PL08X_CHAN_PAUSED: the channel has allocated a physical transport
- * channel, but the transfer is currently paused
- * @PL08X_CHAN_WAITING: the channel is waiting for a physical transport
- * channel to become available (only pertains to memcpy channels)
- */
-enum pl08x_dma_chan_state {
- PL08X_CHAN_IDLE,
- PL08X_CHAN_RUNNING,
- PL08X_CHAN_PAUSED,
- PL08X_CHAN_WAITING,
-};
-
-/**
- * struct pl08x_dma_chan - this structure wraps a DMA ENGINE channel
- * @chan: wrappped abstract channel
- * @phychan: the physical channel utilized by this channel, if there is one
- * @phychan_hold: if non-zero, hold on to the physical channel even if we
- * have no pending entries
- * @tasklet: tasklet scheduled by the IRQ to handle actual work etc
- * @name: name of channel
- * @cd: channel platform data
- * @runtime_addr: address for RX/TX according to the runtime config
- * @runtime_direction: current direction of this channel according to
- * runtime config
- * @pend_list: queued transactions pending on this channel
- * @at: active transaction on this channel
- * @lock: a lock for this channel data
- * @host: a pointer to the host (internal use)
- * @state: whether the channel is idle, paused, running etc
- * @slave: whether this channel is a device (slave) or for memcpy
- * @device_fc: Flow Controller Settings for ccfg register. Only valid for slave
- * channels. Fill with 'true' if peripheral should be flow controller. Direction
- * will be selected at Runtime.
- * @waiting: a TX descriptor on this channel which is waiting for a physical
- * channel to become available
- */
-struct pl08x_dma_chan {
- struct dma_chan chan;
- struct pl08x_phy_chan *phychan;
- int phychan_hold;
- struct tasklet_struct tasklet;
- char *name;
- const struct pl08x_channel_data *cd;
- dma_addr_t src_addr;
- dma_addr_t dst_addr;
- u32 src_cctl;
- u32 dst_cctl;
- enum dma_transfer_direction runtime_direction;
- struct list_head pend_list;
- struct pl08x_txd *at;
- spinlock_t lock;
- struct pl08x_driver_data *host;
- enum pl08x_dma_chan_state state;
- bool slave;
- bool device_fc;
- struct pl08x_txd *waiting;
-};
-
-/**
* struct pl08x_platform_data - the platform configuration for the PL08x
* PrimeCells.
* @slave_channels: the channels defined for the different devices on the
@@ -229,8 +89,8 @@ struct pl08x_platform_data {
const struct pl08x_channel_data *slave_channels;
unsigned int num_slave_channels;
struct pl08x_channel_data memcpy_channel;
- int (*get_signal)(struct pl08x_dma_chan *);
- void (*put_signal)(struct pl08x_dma_chan *);
+ int (*get_signal)(const struct pl08x_channel_data *);
+ void (*put_signal)(const struct pl08x_channel_data *, int);
u8 lli_buses;
u8 mem_buses;
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 15:33:52 +0000