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Ip=[149.199.60.100]; Helo=[xsj-pvapsmtpgw02] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR02MB4349 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 104.47.40.81 Subject: [Qemu-devel] [PATCH] xilinx_spips: Make dma transactions as per dma_burst_size X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Edgar E. Iglesias" , Peter Maydell , Alistair Francis , Francisco Iglesias , Peter Crosthwaite Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Qspi dma has a burst length of 64 bytes, So limit transaction length to 64 max. Signed-off-by: Sai Pavan Boddu --- hw/ssi/xilinx_spips.c | 18 +++++++++++++++--- include/hw/ssi/xilinx_spips.h | 3 ++- 2 files changed, 17 insertions(+), 4 deletions(-) diff --git a/hw/ssi/xilinx_spips.c b/hw/ssi/xilinx_spips.c index 03f5fae..ea006c4 100644 --- a/hw/ssi/xilinx_spips.c +++ b/hw/ssi/xilinx_spips.c @@ -851,12 +851,17 @@ static void xlnx_zynqmp_qspips_notify(void *opaque) { size_t ret; uint32_t num; - const void *rxd = pop_buf(recv_fifo, 4, &num); + const void *rxd; + int len; + + len = recv_fifo->num >= rq->dma_burst_size ? rq->dma_burst_size : + recv_fifo->num; + rxd = pop_buf(recv_fifo, len, &num); memcpy(rq->dma_buf, rxd, num); - ret = stream_push(rq->dma, rq->dma_buf, 4); - assert(ret == 4); + ret = stream_push(rq->dma, rq->dma_buf, num); + assert(ret == num); xlnx_zynqmp_qspips_check_flush(rq); } } @@ -1337,6 +1342,7 @@ static void xlnx_zynqmp_qspips_realize(DeviceState *dev, Error **errp) fifo8_create(&s->rx_fifo_g, xsc->rx_fifo_size); fifo8_create(&s->tx_fifo_g, xsc->tx_fifo_size); fifo32_create(&s->fifo_g, 32); + s->dma_buf = g_new0(uint8_t, s->dma_burst_size); } static void xlnx_zynqmp_qspips_init(Object *obj) @@ -1411,6 +1417,11 @@ static const VMStateDescription vmstate_xlnx_zynqmp_qspips = { } }; +static Property xilinx_zynqmp_qspips_properties[] = { + DEFINE_PROP_UINT32("dma-burst-size", XlnxZynqMPQSPIPS, dma_burst_size, 64), + DEFINE_PROP_END_OF_LIST(), +}; + static Property xilinx_qspips_properties[] = { /* We had to turn this off for 2.10 as it is not compatible with migration. * It can be enabled but will prevent the device to be migrated. @@ -1463,6 +1474,7 @@ static void xlnx_zynqmp_qspips_class_init(ObjectClass *klass, void * data) dc->realize = xlnx_zynqmp_qspips_realize; dc->reset = xlnx_zynqmp_qspips_reset; dc->vmsd = &vmstate_xlnx_zynqmp_qspips; + dc->props = xilinx_zynqmp_qspips_properties; xsc->reg_ops = &xlnx_zynqmp_qspips_ops; xsc->rx_fifo_size = RXFF_A_Q; xsc->tx_fifo_size = TXFF_A_Q; diff --git a/include/hw/ssi/xilinx_spips.h b/include/hw/ssi/xilinx_spips.h index d398a4e..cca1813 100644 --- a/include/hw/ssi/xilinx_spips.h +++ b/include/hw/ssi/xilinx_spips.h @@ -95,7 +95,8 @@ typedef struct { XilinxQSPIPS parent_obj; StreamSlave *dma; - uint8_t dma_buf[4]; + uint8_t *dma_buf; + uint32_t dma_burst_size; int gqspi_irqline; uint32_t regs[XLNX_ZYNQMP_SPIPS_R_MAX];