From 42d0349784c74d8a1e92cfbec120b9a6868b0c25 Mon Sep 17 00:00:00 2001 From: Roy Pledge Date: Mon, 18 Sep 2017 16:39:36 -0400 Subject: soc/fsl/qbman: Add common routine for QBMan private allocations The QBMan device uses several memory regions to manage frame queues and buffers. Add a common routine for extracting and initializing these reserved memory areas. Signed-off-by: Roy Pledge Reviewed-by: Catalin Marinas Signed-off-by: Li Yang --- drivers/soc/fsl/qbman/Makefile | 2 +- drivers/soc/fsl/qbman/dpaa_sys.c | 78 ++++++++++++++++++++++++++++++++++++++++ drivers/soc/fsl/qbman/dpaa_sys.h | 4 +++ 3 files changed, 83 insertions(+), 1 deletion(-) create mode 100644 drivers/soc/fsl/qbman/dpaa_sys.c (limited to 'drivers/soc') diff --git a/drivers/soc/fsl/qbman/Makefile b/drivers/soc/fsl/qbman/Makefile index 7ae199f1664e..3cbd08aeab59 100644 --- a/drivers/soc/fsl/qbman/Makefile +++ b/drivers/soc/fsl/qbman/Makefile @@ -1,6 +1,6 @@ obj-$(CONFIG_FSL_DPAA) += bman_ccsr.o qman_ccsr.o \ bman_portal.o qman_portal.o \ - bman.o qman.o + bman.o qman.o dpaa_sys.o obj-$(CONFIG_FSL_BMAN_TEST) += bman-test.o bman-test-y = bman_test.o diff --git a/drivers/soc/fsl/qbman/dpaa_sys.c b/drivers/soc/fsl/qbman/dpaa_sys.c new file mode 100644 index 000000000000..9436aa83ff1b --- /dev/null +++ b/drivers/soc/fsl/qbman/dpaa_sys.c @@ -0,0 +1,78 @@ +/* Copyright 2017 NXP Semiconductor, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NXP Semiconductor nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") as published by the Free Software + * Foundation, either version 2 of that License or (at your option) any + * later version. + * + * THIS SOFTWARE IS PROVIDED BY NXP Semiconductor ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NXP Semiconductor BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#include "dpaa_sys.h" + +/* + * Initialize a devices private memory region + */ +int qbman_init_private_mem(struct device *dev, int idx, dma_addr_t *addr, + size_t *size) +{ + int ret; + struct device_node *mem_node; + u64 size64; + + ret = of_reserved_mem_device_init_by_idx(dev, dev->of_node, idx); + if (ret) { + dev_err(dev, + "of_reserved_mem_device_init_by_idx(%d) failed 0x%x\n", + idx, ret); + return -ENODEV; + } + mem_node = of_parse_phandle(dev->of_node, "memory-region", 0); + if (mem_node) { + ret = of_property_read_u64(mem_node, "size", &size64); + if (ret) { + dev_err(dev, "of_address_to_resource fails 0x%x\n", + ret); + return -ENODEV; + } + *size = size64; + } else { + dev_err(dev, "No memory-region found for index %d\n", idx); + return -ENODEV; + } + + if (!dma_zalloc_coherent(dev, *size, addr, 0)) { + dev_err(dev, "DMA Alloc memory failed\n"); + return -ENODEV; + } + + /* + * Disassociate the reserved memory area from the device + * because a device can only have one DMA memory area. This + * should be fine since the memory is allocated and initialized + * and only ever accessed by the QBMan device from now on + */ + of_reserved_mem_device_release(dev); + return 0; +} diff --git a/drivers/soc/fsl/qbman/dpaa_sys.h b/drivers/soc/fsl/qbman/dpaa_sys.h index 2ce394aa4c95..676af829cea0 100644 --- a/drivers/soc/fsl/qbman/dpaa_sys.h +++ b/drivers/soc/fsl/qbman/dpaa_sys.h @@ -102,4 +102,8 @@ static inline u8 dpaa_cyc_diff(u8 ringsize, u8 first, u8 last) /* Offset applied to genalloc pools due to zero being an error return */ #define DPAA_GENALLOC_OFF 0x80000000 +/* Initialize the devices private memory region */ +int qbman_init_private_mem(struct device *dev, int idx, dma_addr_t *addr, + size_t *size); + #endif /* __DPAA_SYS_H */ -- cgit v1.2.3-55-g7522