@@ -8,6 +8,7 @@ common-obj-$(CONFIG_XILINX_AXI) += xilinx_axidma.o
common-obj-$(CONFIG_ETRAXFS) += etraxfs_dma.o
common-obj-$(CONFIG_STP2000) += sparc32_dma.o
common-obj-$(CONFIG_SUN4M) += sun4m_iommu.o
+obj-$(CONFIG_XLNX_ZYNQMP) += xlnx_dpdma.o
obj-$(CONFIG_OMAP) += omap_dma.o soc_dma.o
obj-$(CONFIG_PXA2XX) += pxa2xx_dma.o
new file mode 100644
@@ -0,0 +1,789 @@
+/*
+ * xlnx_dpdma.c
+ *
+ * Copyright (C) 2015 : GreenSocs Ltd
+ * http://www.greensocs.com/ , email: info@greensocs.com
+ *
+ * Developed by :
+ * Frederic Konrad <fred.konrad@greensocs.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "xlnx_dpdma.h"
+
+#ifndef DEBUG_DPDMA
+#define DEBUG_DPDMA 0
+#endif
+
+#define DPRINTF(fmt, ...) do { \
+ if (DEBUG_DPDMA) { \
+ qemu_log("xlnx_dpdma: " fmt , ## __VA_ARGS__); \
+ } \
+} while (0);
+
+/*
+ * Registers offset for DPDMA.
+ */
+#define DPDMA_ERR_CTRL (0x0000)
+#define DPDMA_ISR (0x0004 >> 2)
+#define DPDMA_IMR (0x0008 >> 2)
+#define DPDMA_IEN (0x000C >> 2)
+#define DPDMA_IDS (0x0010 >> 2)
+#define DPDMA_EISR (0x0014 >> 2)
+#define DPDMA_EIMR (0x0018 >> 2)
+#define DPDMA_EIEN (0x001C >> 2)
+#define DPDMA_EIDS (0x0020 >> 2)
+#define DPDMA_CNTL (0x0100 >> 2)
+
+#define DPDMA_GBL (0x0104 >> 2)
+#define DPDMA_GBL_TRG_CH(n) (1 << n)
+#define DPDMA_GBL_RTRG_CH(n) (1 << 6 << n)
+
+#define DPDMA_ALC0_CNTL (0x0108 >> 2)
+#define DPDMA_ALC0_STATUS (0x010C >> 2)
+#define DPDMA_ALC0_MAX (0x0110 >> 2)
+#define DPDMA_ALC0_MIN (0x0114 >> 2)
+#define DPDMA_ALC0_ACC (0x0118 >> 2)
+#define DPDMA_ALC0_ACC_TRAN (0x011C >> 2)
+#define DPDMA_ALC1_CNTL (0x0120 >> 2)
+#define DPDMA_ALC1_STATUS (0x0124 >> 2)
+#define DPDMA_ALC1_MAX (0x0128 >> 2)
+#define DPDMA_ALC1_MIN (0x012C >> 2)
+#define DPDMA_ALC1_ACC (0x0130 >> 2)
+#define DPDMA_ALC1_ACC_TRAN (0x0134 >> 2)
+
+#define DPDMA_DSCR_STRT_ADDRE_CH(n) ((0x0200 + n * 0x100) >> 2)
+#define DPDMA_DSCR_STRT_ADDR_CH(n) ((0x0204 + n * 0x100) >> 2)
+#define DPDMA_DSCR_NEXT_ADDRE_CH(n) ((0x0208 + n * 0x100) >> 2)
+#define DPDMA_DSCR_NEXT_ADDR_CH(n) ((0x020C + n * 0x100) >> 2)
+#define DPDMA_PYLD_CUR_ADDRE_CH(n) ((0x0210 + n * 0x100) >> 2)
+#define DPDMA_PYLD_CUR_ADDR_CH(n) ((0x0214 + n * 0x100) >> 2)
+
+#define DPDMA_CNTL_CH(n) ((0x0218 + n * 0x100) >> 2)
+#define DPDMA_CNTL_CH_EN (1)
+#define DPDMA_CNTL_CH_PAUSED (1 << 1)
+
+#define DPDMA_STATUS_CH(n) ((0x021C + n * 0x100) >> 2)
+#define DPDMA_STATUS_BURST_TYPE (1 << 4)
+#define DPDMA_STATUS_MODE (1 << 5)
+#define DPDMA_STATUS_EN_CRC (1 << 6)
+#define DPDMA_STATUS_LAST_DSCR (1 << 7)
+#define DPDMA_STATUS_LDSCR_FRAME (1 << 8)
+#define DPDMA_STATUS_IGNR_DONE (1 << 9)
+#define DPDMA_STATUS_DSCR_DONE (1 << 10)
+#define DPDMA_STATUS_EN_DSCR_UP (1 << 11)
+#define DPDMA_STATUS_EN_DSCR_INTR (1 << 12)
+#define DPDMA_STATUS_PREAMBLE_OFF (13)
+
+#define DPDMA_VDO_CH(n) ((0x0220 + n * 0x100) >> 2)
+#define DPDMA_PYLD_SZ_CH(n) ((0x0224 + n * 0x100) >> 2)
+#define DPDMA_DSCR_ID_CH(n) ((0x0228 + n * 0x100) >> 2)
+
+/*
+ * Descriptor control field.
+ */
+#define CONTROL_PREAMBLE_VALUE 0xA5
+
+#define DSCR_CTRL_PREAMBLE 0xFF
+#define DSCR_CTRL_EN_DSCR_DONE_INTR (1 << 8)
+#define DSCR_CTRL_EN_DSCR_UPDATE (1 << 9)
+#define DSCR_CTRL_IGNORE_DONE (1 << 10)
+#define DSCR_CTRL_AXI_BURST_TYPE (1 << 11)
+#define DSCR_CTRL_AXCACHE (0x0F << 12)
+#define DSCR_CTRL_AXPROT (0x2 << 16)
+#define DSCR_CTRL_DESCRIPTOR_MODE (1 << 18)
+#define DSCR_CTRL_LAST_DESCRIPTOR (1 << 19)
+#define DSCR_CTRL_ENABLE_CRC (1 << 20)
+#define DSCR_CTRL_LAST_DESCRIPTOR_OF_FRAME (1 << 21)
+
+/*
+ * Descriptor timestamp field.
+ */
+#define STATUS_DONE (1 << 31)
+
+#define DPDMA_FRAG_MAX_SZ (4096)
+
+typedef enum DPDMABurstType {
+ DPDMA_INCR = 0,
+ DPDMA_FIXED = 1
+} DPDMABurstType;
+
+typedef enum DPDMAMode {
+ DPDMA_CONTIGOUS = 0,
+ DPDMA_FRAGMENTED = 1
+} DPDMAMode;
+
+typedef struct DPDMADescriptor {
+ uint32_t control;
+ uint32_t descriptor_id;
+ /* transfer size in byte. */
+ uint32_t xfer_size;
+ uint32_t line_size_stride;
+ uint32_t timestamp_lsb;
+ uint32_t timestamp_msb;
+ /* contains extension for both descriptor and source. */
+ uint32_t address_extension;
+ uint32_t next_descriptor;
+ uint32_t source_address;
+ uint32_t address_extension_23;
+ uint32_t address_extension_45;
+ uint32_t source_address2;
+ uint32_t source_address3;
+ uint32_t source_address4;
+ uint32_t source_address5;
+ uint32_t crc;
+} DPDMADescriptor;
+
+static bool xlnx_dpdma_desc_is_last(DPDMADescriptor *desc)
+{
+ return ((desc->control & DSCR_CTRL_LAST_DESCRIPTOR) != 0);
+}
+
+static bool xlnx_dpdma_desc_is_last_of_frame(DPDMADescriptor *desc)
+{
+ return ((desc->control & DSCR_CTRL_LAST_DESCRIPTOR_OF_FRAME) != 0);
+}
+
+static uint64_t xlnx_dpdma_desc_get_source_address(DPDMADescriptor *desc,
+ uint8_t frag)
+{
+ uint64_t addr = 0;
+ assert(frag < 5);
+
+ switch (frag) {
+ case 0:
+ addr = desc->source_address
+ + (extract32(desc->address_extension, 16, 12) << 20);
+ break;
+ case 1:
+ addr = desc->source_address2
+ + (extract32(desc->address_extension_23, 0, 12) << 8);
+ break;
+ case 2:
+ addr = desc->source_address3
+ + (extract32(desc->address_extension_23, 16, 12) << 20);
+ break;
+ case 3:
+ addr = desc->source_address4
+ + (extract32(desc->address_extension_45, 0, 12) << 8);
+ break;
+ case 4:
+ addr = desc->source_address5
+ + (extract32(desc->address_extension_45, 16, 12) << 20);
+ break;
+ default:
+ addr = 0;
+ break;
+ }
+
+ return addr;
+}
+
+static uint32_t xlnx_dpdma_desc_get_transfer_size(DPDMADescriptor *desc)
+{
+ return desc->xfer_size;
+}
+
+static uint32_t xlnx_dpdma_desc_get_line_size(DPDMADescriptor *desc)
+{
+ return extract32(desc->line_size_stride, 0, 18);
+}
+
+static uint32_t xlnx_dpdma_desc_get_line_stride(DPDMADescriptor *desc)
+{
+ return extract32(desc->line_size_stride, 18, 14) * 16;
+}
+
+static inline bool xlnx_dpdma_desc_crc_enabled(DPDMADescriptor *desc)
+{
+ return (desc->control & DSCR_CTRL_ENABLE_CRC) != 0;
+}
+
+static inline bool xlnx_dpdma_desc_check_crc(DPDMADescriptor *desc)
+{
+ uint32_t *p = (uint32_t *)desc;
+ uint32_t crc = 0;
+ uint8_t i;
+
+ /*
+ * CRC is calculated on the whole descriptor except the last 32bits word
+ * using 32bits addition.
+ */
+ for (i = 0; i < 15; i++) {
+ crc += p[i];
+ }
+
+ return crc == desc->crc;
+}
+
+static inline bool xlnx_dpdma_desc_completion_interrupt(DPDMADescriptor *desc)
+{
+ return (desc->control & DSCR_CTRL_EN_DSCR_DONE_INTR) != 0;
+}
+
+static inline bool xlnx_dpdma_desc_is_valid(DPDMADescriptor *desc)
+{
+ return (desc->control & DSCR_CTRL_PREAMBLE) == CONTROL_PREAMBLE_VALUE;
+}
+
+static inline bool xlnx_dpdma_desc_is_contiguous(DPDMADescriptor *desc)
+{
+ return (desc->control & DSCR_CTRL_DESCRIPTOR_MODE) == 0;
+}
+
+static inline bool xlnx_dpdma_desc_update_enabled(DPDMADescriptor *desc)
+{
+ return (desc->control & DSCR_CTRL_EN_DSCR_UPDATE) != 0;
+}
+
+static inline void xlnx_dpdma_desc_set_done(DPDMADescriptor *desc)
+{
+ desc->timestamp_msb |= STATUS_DONE;
+}
+
+static inline bool xlnx_dpdma_desc_is_already_done(DPDMADescriptor *desc)
+{
+ return (desc->timestamp_msb & STATUS_DONE) != 0;
+}
+
+static inline bool xlnx_dpdma_desc_ignore_done_bit(DPDMADescriptor *desc)
+{
+ return (desc->control & DSCR_CTRL_IGNORE_DONE) != 0;
+}
+
+static const VMStateDescription vmstate_xlnx_dpdma = {
+ .name = TYPE_XLNX_DPDMA,
+ .version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32_ARRAY(registers, XlnxDPDMAState,
+ XLNX_DPDMA_REG_ARRAY_SIZE),
+ VMSTATE_BOOL_ARRAY(operation_finished, XlnxDPDMAState, 6),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void xlnx_dpdma_update_irq(XlnxDPDMAState *s)
+{
+ bool flags;
+
+ flags = ((s->registers[DPDMA_ISR] & (~s->registers[DPDMA_IMR]))
+ || (s->registers[DPDMA_EISR] & (~s->registers[DPDMA_EIMR])));
+ qemu_set_irq(s->irq, flags);
+}
+
+static uint64_t xlnx_dpdma_descriptor_start_address(XlnxDPDMAState *s,
+ uint8_t channel)
+{
+ return (s->registers[DPDMA_DSCR_STRT_ADDRE_CH(channel)] << 16)
+ + s->registers[DPDMA_DSCR_STRT_ADDR_CH(channel)];
+}
+
+static uint64_t xlnx_dpdma_descriptor_next_address(XlnxDPDMAState *s,
+ uint8_t channel)
+{
+ return ((uint64_t)s->registers[DPDMA_DSCR_NEXT_ADDRE_CH(channel)] << 32)
+ + s->registers[DPDMA_DSCR_NEXT_ADDR_CH(channel)];
+}
+
+static inline void xlnx_dpdma_set_desc_next_address(XlnxDPDMAState *s,
+ uint8_t channel,
+ uint64_t addr)
+{
+ s->registers[DPDMA_DSCR_NEXT_ADDRE_CH(channel)] = extract64(addr, 32, 32);
+ s->registers[DPDMA_DSCR_NEXT_ADDR_CH(channel)] = extract64(addr, 0, 32);
+}
+
+static bool xlnx_dpdma_is_channel_enabled(XlnxDPDMAState *s,
+ uint8_t channel)
+{
+ return (s->registers[DPDMA_CNTL_CH(channel)] & DPDMA_CNTL_CH_EN) != 0;
+}
+
+static bool xlnx_dpdma_is_channel_paused(XlnxDPDMAState *s,
+ uint8_t channel)
+{
+ return (s->registers[DPDMA_CNTL_CH(channel)] & DPDMA_CNTL_CH_PAUSED) != 0;
+}
+
+static inline bool xlnx_dpdma_is_channel_retriggered(XlnxDPDMAState *s,
+ uint8_t channel)
+{
+ /* Clear the retriggered bit after reading it. */
+ bool channel_is_retriggered = s->registers[DPDMA_GBL]
+ & DPDMA_GBL_RTRG_CH(channel);
+ s->registers[DPDMA_GBL] &= ~DPDMA_GBL_RTRG_CH(channel);
+ return channel_is_retriggered;
+}
+
+static inline bool xlnx_dpdma_is_channel_triggered(XlnxDPDMAState *s,
+ uint8_t channel)
+{
+ return s->registers[DPDMA_GBL] & DPDMA_GBL_TRG_CH(channel);
+}
+
+static void xlnx_dpdma_update_desc_info(XlnxDPDMAState *s, uint8_t channel,
+ DPDMADescriptor *desc)
+{
+ s->registers[DPDMA_DSCR_NEXT_ADDRE_CH(channel)] =
+ extract32(desc->address_extension, 0, 16);
+ s->registers[DPDMA_DSCR_NEXT_ADDR_CH(channel)] = desc->next_descriptor;
+ s->registers[DPDMA_PYLD_CUR_ADDRE_CH(channel)] =
+ extract32(desc->address_extension, 16, 16);
+ s->registers[DPDMA_PYLD_CUR_ADDR_CH(channel)] = desc->source_address;
+ s->registers[DPDMA_VDO_CH(channel)] =
+ extract32(desc->line_size_stride, 18, 14)
+ + (extract32(desc->line_size_stride, 0, 18)
+ << 14);
+ s->registers[DPDMA_PYLD_SZ_CH(channel)] = desc->xfer_size;
+ s->registers[DPDMA_DSCR_ID_CH(channel)] = desc->descriptor_id;
+
+ /* Compute the status register with the descriptor information. */
+ s->registers[DPDMA_STATUS_CH(channel)] =
+ extract32(desc->control, 0, 8) << 13;
+ if ((desc->control & DSCR_CTRL_EN_DSCR_DONE_INTR) != 0) {
+ s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_EN_DSCR_INTR;
+ }
+ if ((desc->control & DSCR_CTRL_EN_DSCR_UPDATE) != 0) {
+ s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_EN_DSCR_UP;
+ }
+ if ((desc->timestamp_msb & STATUS_DONE) != 0) {
+ s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_DSCR_DONE;
+ }
+ if ((desc->control & DSCR_CTRL_IGNORE_DONE) != 0) {
+ s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_IGNR_DONE;
+ }
+ if ((desc->control & DSCR_CTRL_LAST_DESCRIPTOR_OF_FRAME) != 0) {
+ s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_LDSCR_FRAME;
+ }
+ if ((desc->control & DSCR_CTRL_LAST_DESCRIPTOR) != 0) {
+ s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_LAST_DSCR;
+ }
+ if ((desc->control & DSCR_CTRL_ENABLE_CRC) != 0) {
+ s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_EN_CRC;
+ }
+ if ((desc->control & DSCR_CTRL_DESCRIPTOR_MODE) != 0) {
+ s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_MODE;
+ }
+ if ((desc->control & DSCR_CTRL_AXI_BURST_TYPE) != 0) {
+ s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_BURST_TYPE;
+ }
+}
+
+static void xlnx_dpdma_dump_descriptor(DPDMADescriptor *desc)
+{
+ if (DEBUG_DPDMA) {
+ qemu_log("DUMP DESCRIPTOR:\n");
+ qemu_hexdump((char *)desc, stdout, "", sizeof(DPDMADescriptor));
+ }
+}
+
+static uint64_t xlnx_dpdma_read(void *opaque, hwaddr offset,
+ unsigned size)
+{
+ XlnxDPDMAState *s = XLNX_DPDMA(opaque);
+
+ DPRINTF("read @%" HWADDR_PRIx "\n", offset);
+ offset = offset >> 2;
+
+ switch (offset) {
+ /*
+ * Trying to read a write only register.
+ */
+ case DPDMA_GBL:
+ return 0;
+ default:
+ assert(offset <= (0xFFC >> 2));
+ return s->registers[offset];
+ }
+ return 0;
+}
+
+static void xlnx_dpdma_write(void *opaque, hwaddr offset,
+ uint64_t value, unsigned size)
+{
+ XlnxDPDMAState *s = XLNX_DPDMA(opaque);
+
+ DPRINTF("write @%" HWADDR_PRIx " = %" PRIx64 "\n", offset, value);
+ offset = offset >> 2;
+
+ switch (offset) {
+ case DPDMA_ISR:
+ s->registers[DPDMA_ISR] &= ~value;
+ xlnx_dpdma_update_irq(s);
+ break;
+ case DPDMA_IEN:
+ s->registers[DPDMA_IMR] &= ~value;
+ break;
+ case DPDMA_IDS:
+ s->registers[DPDMA_IMR] |= value;
+ break;
+ case DPDMA_EISR:
+ s->registers[DPDMA_EISR] &= ~value;
+ xlnx_dpdma_update_irq(s);
+ break;
+ case DPDMA_EIEN:
+ s->registers[DPDMA_EIMR] &= ~value;
+ break;
+ case DPDMA_EIDS:
+ s->registers[DPDMA_EIMR] |= value;
+ break;
+ case DPDMA_IMR:
+ case DPDMA_EIMR:
+ case DPDMA_DSCR_NEXT_ADDRE_CH(0):
+ case DPDMA_DSCR_NEXT_ADDRE_CH(1):
+ case DPDMA_DSCR_NEXT_ADDRE_CH(2):
+ case DPDMA_DSCR_NEXT_ADDRE_CH(3):
+ case DPDMA_DSCR_NEXT_ADDRE_CH(4):
+ case DPDMA_DSCR_NEXT_ADDRE_CH(5):
+ case DPDMA_DSCR_NEXT_ADDR_CH(0):
+ case DPDMA_DSCR_NEXT_ADDR_CH(1):
+ case DPDMA_DSCR_NEXT_ADDR_CH(2):
+ case DPDMA_DSCR_NEXT_ADDR_CH(3):
+ case DPDMA_DSCR_NEXT_ADDR_CH(4):
+ case DPDMA_DSCR_NEXT_ADDR_CH(5):
+ case DPDMA_PYLD_CUR_ADDRE_CH(0):
+ case DPDMA_PYLD_CUR_ADDRE_CH(1):
+ case DPDMA_PYLD_CUR_ADDRE_CH(2):
+ case DPDMA_PYLD_CUR_ADDRE_CH(3):
+ case DPDMA_PYLD_CUR_ADDRE_CH(4):
+ case DPDMA_PYLD_CUR_ADDRE_CH(5):
+ case DPDMA_PYLD_CUR_ADDR_CH(0):
+ case DPDMA_PYLD_CUR_ADDR_CH(1):
+ case DPDMA_PYLD_CUR_ADDR_CH(2):
+ case DPDMA_PYLD_CUR_ADDR_CH(3):
+ case DPDMA_PYLD_CUR_ADDR_CH(4):
+ case DPDMA_PYLD_CUR_ADDR_CH(5):
+ case DPDMA_STATUS_CH(0):
+ case DPDMA_STATUS_CH(1):
+ case DPDMA_STATUS_CH(2):
+ case DPDMA_STATUS_CH(3):
+ case DPDMA_STATUS_CH(4):
+ case DPDMA_STATUS_CH(5):
+ case DPDMA_VDO_CH(0):
+ case DPDMA_VDO_CH(1):
+ case DPDMA_VDO_CH(2):
+ case DPDMA_VDO_CH(3):
+ case DPDMA_VDO_CH(4):
+ case DPDMA_VDO_CH(5):
+ case DPDMA_PYLD_SZ_CH(0):
+ case DPDMA_PYLD_SZ_CH(1):
+ case DPDMA_PYLD_SZ_CH(2):
+ case DPDMA_PYLD_SZ_CH(3):
+ case DPDMA_PYLD_SZ_CH(4):
+ case DPDMA_PYLD_SZ_CH(5):
+ case DPDMA_DSCR_ID_CH(0):
+ case DPDMA_DSCR_ID_CH(1):
+ case DPDMA_DSCR_ID_CH(2):
+ case DPDMA_DSCR_ID_CH(3):
+ case DPDMA_DSCR_ID_CH(4):
+ case DPDMA_DSCR_ID_CH(5):
+ /*
+ * Trying to write to a read only register..
+ */
+ break;
+ case DPDMA_GBL:
+ /*
+ * This is a write only register so it's read as zero in the read
+ * callback.
+ * We store the value anyway so we can know if the channel is
+ * enabled.
+ */
+ s->registers[offset] |= value & 0x00000FFF;
+ break;
+ case DPDMA_DSCR_STRT_ADDRE_CH(0):
+ case DPDMA_DSCR_STRT_ADDRE_CH(1):
+ case DPDMA_DSCR_STRT_ADDRE_CH(2):
+ case DPDMA_DSCR_STRT_ADDRE_CH(3):
+ case DPDMA_DSCR_STRT_ADDRE_CH(4):
+ case DPDMA_DSCR_STRT_ADDRE_CH(5):
+ value &= 0x0000FFFF;
+ s->registers[offset] = value;
+ break;
+ case DPDMA_CNTL_CH(0):
+ s->registers[DPDMA_GBL] &= ~DPDMA_GBL_TRG_CH(0);
+ value &= 0x3FFFFFFF;
+ s->registers[offset] = value;
+ break;
+ case DPDMA_CNTL_CH(1):
+ s->registers[DPDMA_GBL] &= ~DPDMA_GBL_TRG_CH(1);
+ value &= 0x3FFFFFFF;
+ s->registers[offset] = value;
+ break;
+ case DPDMA_CNTL_CH(2):
+ s->registers[DPDMA_GBL] &= ~DPDMA_GBL_TRG_CH(2);
+ value &= 0x3FFFFFFF;
+ s->registers[offset] = value;
+ break;
+ case DPDMA_CNTL_CH(3):
+ s->registers[DPDMA_GBL] &= ~DPDMA_GBL_TRG_CH(3);
+ value &= 0x3FFFFFFF;
+ s->registers[offset] = value;
+ break;
+ case DPDMA_CNTL_CH(4):
+ s->registers[DPDMA_GBL] &= ~DPDMA_GBL_TRG_CH(4);
+ value &= 0x3FFFFFFF;
+ s->registers[offset] = value;
+ break;
+ case DPDMA_CNTL_CH(5):
+ s->registers[DPDMA_GBL] &= ~DPDMA_GBL_TRG_CH(5);
+ value &= 0x3FFFFFFF;
+ s->registers[offset] = value;
+ break;
+ default:
+ assert(offset <= (0xFFC >> 2));
+ s->registers[offset] = value;
+ break;
+ }
+}
+
+static const MemoryRegionOps dma_ops = {
+ .read = xlnx_dpdma_read,
+ .write = xlnx_dpdma_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ },
+ .impl = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ },
+};
+
+static void xlnx_dpdma_init(Object *obj)
+{
+ SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+ XlnxDPDMAState *s = XLNX_DPDMA(obj);
+
+ memory_region_init_io(&s->iomem, obj, &dma_ops, s,
+ TYPE_XLNX_DPDMA, 0x1000);
+ sysbus_init_mmio(sbd, &s->iomem);
+ sysbus_init_irq(sbd, &s->irq);
+}
+
+static void xlnx_dpdma_reset(DeviceState *dev)
+{
+ XlnxDPDMAState *s = XLNX_DPDMA(dev);
+ size_t i;
+
+ memset(s->registers, 0, sizeof(s->registers));
+ s->registers[DPDMA_IMR] = 0x07FFFFFF;
+ s->registers[DPDMA_EIMR] = 0xFFFFFFFF;
+ s->registers[DPDMA_ALC0_MIN] = 0x0000FFFF;
+ s->registers[DPDMA_ALC1_MIN] = 0x0000FFFF;
+
+ for (i = 0; i < 6; i++) {
+ s->data[i] = NULL;
+ }
+}
+
+static void xlnx_dpdma_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+
+ dc->vmsd = &vmstate_xlnx_dpdma;
+ dc->reset = xlnx_dpdma_reset;
+}
+
+static const TypeInfo xlnx_dpdma_info = {
+ .name = TYPE_XLNX_DPDMA,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(XlnxDPDMAState),
+ .instance_init = xlnx_dpdma_init,
+ .class_init = xlnx_dpdma_class_init,
+};
+
+static void xlnx_dpdma_register_types(void)
+{
+ type_register_static(&xlnx_dpdma_info);
+}
+
+size_t xlnx_dpdma_start_operation(XlnxDPDMAState *s, uint8_t channel,
+ bool one_desc)
+{
+ uint64_t desc_addr;
+ uint64_t source_addr[6];
+ DPDMADescriptor desc;
+ bool done = false;
+ size_t ptr = 0;
+
+ assert(channel <= 5);
+
+ /* Trigger a VSYNC IRQ when the graphic callback asks for data. */
+ if (channel == 3) {
+ s->registers[DPDMA_ISR] |= (1 << 27);
+ xlnx_dpdma_update_irq(s);
+ }
+
+ DPRINTF("start dpdma channel 0x%" PRIX8 "\n", channel);
+
+ if (!xlnx_dpdma_is_channel_triggered(s, channel)) {
+ DPRINTF("Channel isn't triggered..\n");
+ return 0;
+ }
+
+ if (!xlnx_dpdma_is_channel_enabled(s, channel)) {
+ DPRINTF("Channel isn't enabled..\n");
+ return 0;
+ }
+
+ if (xlnx_dpdma_is_channel_paused(s, channel)) {
+ DPRINTF("Channel is paused..\n");
+ return 0;
+ }
+
+ do {
+ if ((s->operation_finished[channel])
+ || xlnx_dpdma_is_channel_retriggered(s, channel)) {
+ desc_addr = xlnx_dpdma_descriptor_start_address(s, channel);
+ s->operation_finished[channel] = false;
+ } else {
+ desc_addr = xlnx_dpdma_descriptor_next_address(s, channel);
+ }
+
+ if (dma_memory_read(&address_space_memory, desc_addr, &desc,
+ sizeof(DPDMADescriptor))) {
+ s->registers[DPDMA_EISR] |= ((1 << 1) << channel);
+ xlnx_dpdma_update_irq(s);
+ s->operation_finished[channel] = true;
+ DPRINTF("Can't get the descriptor.\n");
+ break;
+ }
+
+ xlnx_dpdma_update_desc_info(s, channel, &desc);
+
+#ifdef DEBUG_DPDMA
+ xlnx_dpdma_dump_descriptor(&desc);
+#endif
+
+ DPRINTF("location of the descriptor: %" PRIx64 "\n", desc_addr);
+ if (!xlnx_dpdma_desc_is_valid(&desc)) {
+ s->registers[DPDMA_EISR] |= ((1 << 7) << channel);
+ xlnx_dpdma_update_irq(s);
+ s->operation_finished[channel] = true;
+ DPRINTF("Invalid descriptor..\n");
+ break;
+ }
+
+ if (xlnx_dpdma_desc_crc_enabled(&desc)
+ && !xlnx_dpdma_desc_check_crc(&desc)) {
+ s->registers[DPDMA_EISR] |= ((1 << 13) << channel);
+ xlnx_dpdma_update_irq(s);
+ s->operation_finished[channel] = true;
+ DPRINTF("Bad CRC for descriptor..\n");
+ break;
+ }
+
+ if (xlnx_dpdma_desc_is_already_done(&desc)
+ && !xlnx_dpdma_desc_ignore_done_bit(&desc)) {
+ /* We are trying to process an already processed descriptor. */
+ s->registers[DPDMA_EISR] |= ((1 << 25) << channel);
+ xlnx_dpdma_update_irq(s);
+ s->operation_finished[channel] = true;
+ DPRINTF("Already processed descriptor..\n");
+ break;
+ }
+
+ done = xlnx_dpdma_desc_is_last(&desc)
+ || xlnx_dpdma_desc_is_last_of_frame(&desc);
+
+ s->operation_finished[channel] = done;
+ if (s->data[channel]) {
+ int64_t transfer_len =
+ xlnx_dpdma_desc_get_transfer_size(&desc);
+ uint32_t line_size = xlnx_dpdma_desc_get_line_size(&desc);
+ uint32_t line_stride = xlnx_dpdma_desc_get_line_stride(&desc);
+ if (xlnx_dpdma_desc_is_contiguous(&desc)) {
+ source_addr[0] =
+ xlnx_dpdma_desc_get_source_address(&desc, 0);
+ while (transfer_len != 0) {
+ if (dma_memory_read(&address_space_memory,
+ source_addr[0],
+ &s->data[channel][ptr],
+ line_size)) {
+ s->registers[DPDMA_ISR] |= ((1 << 12) << channel);
+ xlnx_dpdma_update_irq(s);
+ DPRINTF("Can't get data.\n");
+ break;
+ }
+ ptr += line_size;
+ transfer_len -= line_size;
+ source_addr[0] += line_stride;
+ }
+ } else {
+ DPRINTF("Source address:\n");
+ int frag;
+ for (frag = 0; frag < 5; frag++) {
+ source_addr[frag] =
+ xlnx_dpdma_desc_get_source_address(&desc, frag);
+ DPRINTF("Fragment %u: %" PRIx64 "\n", frag + 1,
+ source_addr[frag]);
+ }
+
+ frag = 0;
+ while ((transfer_len < 0) && (frag < 5)) {
+ size_t fragment_len = DPDMA_FRAG_MAX_SZ
+ - (source_addr[frag] % DPDMA_FRAG_MAX_SZ);
+
+ if (dma_memory_read(&address_space_memory,
+ source_addr[frag],
+ &(s->data[channel][ptr]),
+ fragment_len)) {
+ s->registers[DPDMA_ISR] |= ((1 << 12) << channel);
+ xlnx_dpdma_update_irq(s);
+ DPRINTF("Can't get data.\n");
+ break;
+ }
+ ptr += fragment_len;
+ transfer_len -= fragment_len;
+ frag += 1;
+ }
+ }
+ }
+
+ if (xlnx_dpdma_desc_update_enabled(&desc)) {
+ /* The descriptor need to be updated when it's completed. */
+ DPRINTF("update the descriptor with the done flag set.\n");
+ xlnx_dpdma_desc_set_done(&desc);
+ dma_memory_write(&address_space_memory, desc_addr, &desc,
+ sizeof(DPDMADescriptor));
+ }
+
+ if (xlnx_dpdma_desc_completion_interrupt(&desc)) {
+ DPRINTF("completion interrupt enabled!\n");
+ s->registers[DPDMA_ISR] |= (1 << channel);
+ xlnx_dpdma_update_irq(s);
+ }
+
+ } while (!done && !one_desc);
+
+ return ptr;
+}
+
+void xlnx_dpdma_set_host_data_location(XlnxDPDMAState *s, uint8_t channel,
+ void *p)
+{
+ if (!s) {
+ qemu_log_mask(LOG_UNIMP, "DPDMA client not attached to valid DPDMA"
+ " instance\n");
+ return;
+ }
+
+ assert(channel <= 5);
+ s->data[channel] = p;
+}
+
+type_init(xlnx_dpdma_register_types)
new file mode 100644
@@ -0,0 +1,77 @@
+/*
+ * xlnx_dpdma.h
+ *
+ * Copyright (C) 2015 : GreenSocs Ltd
+ * http://www.greensocs.com/ , email: info@greensocs.com
+ *
+ * Developed by :
+ * Frederic Konrad <fred.konrad@greensocs.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef XLNX_DPDMA_H
+#define XLNX_DPDMA_H
+
+#include "hw/sysbus.h"
+#include "ui/console.h"
+#include "sysemu/dma.h"
+
+#define XLNX_DPDMA_REG_ARRAY_SIZE (0x1000 >> 2)
+
+struct XlnxDPDMAState {
+ /*< private >*/
+ SysBusDevice parent_obj;
+ /*< public >*/
+ MemoryRegion iomem;
+ uint32_t registers[XLNX_DPDMA_REG_ARRAY_SIZE];
+ uint8_t *data[6];
+ bool operation_finished[6];
+ qemu_irq irq;
+};
+
+typedef struct XlnxDPDMAState XlnxDPDMAState;
+
+#define TYPE_XLNX_DPDMA "xlnx.dpdma"
+#define XLNX_DPDMA(obj) OBJECT_CHECK(XlnxDPDMAState, (obj), TYPE_XLNX_DPDMA)
+
+/*
+ * xlnx_dpdma_start_operation: Start the operation on the specified channel. The
+ * DPDMA gets the current descriptor and retrieves
+ * data to the buffer specified by
+ * dpdma_set_host_data_location().
+ *
+ * Returns The number of bytes transfered by the DPDMA or 0 if an error occured.
+ *
+ * @s The DPDMA state.
+ * @channel The channel to start.
+ */
+size_t xlnx_dpdma_start_operation(XlnxDPDMAState *s, uint8_t channel,
+ bool one_desc);
+
+/*
+ * xlnx_dpdma_set_host_data_location: Set the location in the host memory where
+ * to store the data out from the dma
+ * channel.
+ *
+ * @s The DPDMA state.
+ * @channel The channel associated to the pointer.
+ * @p The buffer where to store the data.
+ */
+/* XXX: add a maximum size arg and send an interrupt in case of overflow. */
+void xlnx_dpdma_set_host_data_location(XlnxDPDMAState *s, uint8_t channel,
+ void *p);
+
+#endif /* !XLNX_DPDMA_H */