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Ip=[149.199.60.100]; Helo=[xsj-pvapsmtpgw02] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR02MB1677 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 104.47.38.72 Subject: [Qemu-devel] [PATCH v2] 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 , Peter Crosthwaite , Francisco Iglesias , Alistair Francis , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , "Peter A. G. Crosthwaite" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 | 20 +++++++++++++++++--- include/hw/ssi/xilinx_spips.h | 5 ++++- 2 files changed, 21 insertions(+), 4 deletions(-) diff --git a/hw/ssi/xilinx_spips.c b/hw/ssi/xilinx_spips.c index 03f5fae..0ea57d1 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 =3D pop_buf(recv_fifo, 4, &num); + const void *rxd; + int len; + + len =3D recv_fifo->num >=3D rq->dma_burst_size ? rq->dma_burst_siz= e : + recv_fifo->num; + rxd =3D pop_buf(recv_fifo, len, &num); =20 memcpy(rq->dma_buf, rxd, num); =20 - ret =3D stream_push(rq->dma, rq->dma_buf, 4); - assert(ret =3D=3D 4); + ret =3D stream_push(rq->dma, rq->dma_buf, num); + assert(ret =3D=3D num); xlnx_zynqmp_qspips_check_flush(rq); } } @@ -1337,6 +1342,9 @@ static void xlnx_zynqmp_qspips_realize(DeviceState *d= ev, 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); + if (s->dma_burst_size > QSPI_DMA_MAX_BURST_SIZE) { + s->dma_burst_size =3D QSPI_DMA_MAX_BURST_SIZE; + } } =20 static void xlnx_zynqmp_qspips_init(Object *obj) @@ -1411,6 +1419,11 @@ static const VMStateDescription vmstate_xlnx_zynqmp_= qspips =3D { } }; =20 +static Property xilinx_zynqmp_qspips_properties[] =3D { + DEFINE_PROP_UINT32("dma-burst-size", XlnxZynqMPQSPIPS, dma_burst_size,= 64), + DEFINE_PROP_END_OF_LIST(), +}; + static Property xilinx_qspips_properties[] =3D { /* We had to turn this off for 2.10 as it is not compatible with migra= tion. * It can be enabled but will prevent the device to be migrated. @@ -1463,6 +1476,7 @@ static void xlnx_zynqmp_qspips_class_init(ObjectClass= *klass, void * data) dc->realize =3D xlnx_zynqmp_qspips_realize; dc->reset =3D xlnx_zynqmp_qspips_reset; dc->vmsd =3D &vmstate_xlnx_zynqmp_qspips; + dc->props =3D xilinx_zynqmp_qspips_properties; xsc->reg_ops =3D &xlnx_zynqmp_qspips_ops; xsc->rx_fifo_size =3D RXFF_A_Q; xsc->tx_fifo_size =3D TXFF_A_Q; diff --git a/include/hw/ssi/xilinx_spips.h b/include/hw/ssi/xilinx_spips.h index d398a4e..bc5596a 100644 --- a/include/hw/ssi/xilinx_spips.h +++ b/include/hw/ssi/xilinx_spips.h @@ -37,6 +37,8 @@ typedef struct XilinxSPIPS XilinxSPIPS; /* Bite off 4k chunks at a time */ #define LQSPI_CACHE_SIZE 1024 =20 +#define QSPI_DMA_MAX_BURST_SIZE 2048 + typedef enum { READ =3D 0x3, READ_4 =3D 0x13, FAST_READ =3D 0xb, FAST_READ_4 =3D 0x0c, @@ -95,7 +97,8 @@ typedef struct { XilinxQSPIPS parent_obj; =20 StreamSlave *dma; - uint8_t dma_buf[4]; + uint8_t dma_buf[QSPI_DMA_MAX_BURST_SIZE]; + uint32_t dma_burst_size; int gqspi_irqline; =20 uint32_t regs[XLNX_ZYNQMP_SPIPS_R_MAX]; --=20 2.7.4