[PATCHv2 06/34] bus/fslmc: introduce mc object functions

[Hemant Agrawal <hemant.agrawal@nxp.com>]

This patch intoduces the DPAA2 MC(Management complex Driver).

This is a minimal set of low level functions to send and
receive commands to the fsl-mc. It includes support for basic
management commands and commands to manipulate MC objects.

This is common to be used by various DPAA2 PMDs. e.g.net, crypto
and other drivers.

This is a low level library also used in kernel.

Signed-off-by: Cristian Sovaiala <cristian.sovaiala@nxp.com>
Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
---
 drivers/bus/fslmc/Makefile        |   7 ++
 drivers/bus/fslmc/mc/fsl_mc_cmd.h | 231 ++++++++++++++++++++++++++++++++++++++
 drivers/bus/fslmc/mc/fsl_mc_sys.h |  98 ++++++++++++++++
 drivers/bus/fslmc/mc/mc_sys.c     | 107 ++++++++++++++++++
 4 files changed, 443 insertions(+)
 create mode 100644 drivers/bus/fslmc/mc/fsl_mc_cmd.h
 create mode 100644 drivers/bus/fslmc/mc/fsl_mc_sys.h
 create mode 100644 drivers/bus/fslmc/mc/mc_sys.c

diff --git a/drivers/bus/fslmc/Makefile b/drivers/bus/fslmc/Makefile
index be5e9ce..0cfe464 100644
--- a/drivers/bus/fslmc/Makefile
+++ b/drivers/bus/fslmc/Makefile
@@ -37,6 +37,10 @@ LIB = librte_pmd_fslmcbus.a
 
 CFLAGS += -O3
 CFLAGS += $(WERROR_FLAGS)
+CFLAGS += "-Wno-strict-aliasing"
+
+CFLAGS += -I$(RTE_SDK)/drivers/bus/fslmc
+CFLAGS += -I$(RTE_SDK)/drivers/bus/fslmc/mc
 
 # versioning export map
 EXPORT_MAP := rte_pmd_fslmcbus_version.map
@@ -44,6 +48,9 @@ EXPORT_MAP := rte_pmd_fslmcbus_version.map
 # library version
 LIBABIVER := 1
 
+SRCS-$(CONFIG_RTE_LIBRTE_FSLMC_BUS) += \
+        mc/mc_sys.c
+
 SRCS-$(CONFIG_RTE_LIBRTE_FSLMC_BUS) += fslmc_bus.c
 
 # library dependencies
diff --git a/drivers/bus/fslmc/mc/fsl_mc_cmd.h b/drivers/bus/fslmc/mc/fsl_mc_cmd.h
new file mode 100644
index 0000000..cbd3995
--- /dev/null
+++ b/drivers/bus/fslmc/mc/fsl_mc_cmd.h
@@ -0,0 +1,231 @@
+/* Copyright 2013-2016 Freescale Semiconductor Inc.
+ * Copyright (c) 2016 NXP.
+ *
+ * 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 the above-listed copyright holders nor the
+ * names of any 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDERS OR CONTRIBUTORS 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.
+ */
+#ifndef __FSL_MC_CMD_H
+#define __FSL_MC_CMD_H
+
+#define MC_CMD_NUM_OF_PARAMS	7
+
+#define MAKE_UMASK64(_width) \
+	((uint64_t)((_width) < 64 ? ((uint64_t)1 << (_width)) - 1 : \
+		       (uint64_t)-1))
+
+static inline uint64_t mc_enc(int lsoffset, int width, uint64_t val)
+{
+	return (uint64_t)(((uint64_t)val & MAKE_UMASK64(width)) << lsoffset);
+}
+
+static inline uint64_t mc_dec(uint64_t val, int lsoffset, int width)
+{
+	return (uint64_t)((val >> lsoffset) & MAKE_UMASK64(width));
+}
+
+struct mc_command {
+	uint64_t header;
+	uint64_t params[MC_CMD_NUM_OF_PARAMS];
+};
+
+/**
+ * enum mc_cmd_status - indicates MC status at command response
+ * @MC_CMD_STATUS_OK: Completed successfully
+ * @MC_CMD_STATUS_READY: Ready to be processed
+ * @MC_CMD_STATUS_AUTH_ERR: Authentication error
+ * @MC_CMD_STATUS_NO_PRIVILEGE: No privilege
+ * @MC_CMD_STATUS_DMA_ERR: DMA or I/O error
+ * @MC_CMD_STATUS_CONFIG_ERR: Configuration error
+ * @MC_CMD_STATUS_TIMEOUT: Operation timed out
+ * @MC_CMD_STATUS_NO_RESOURCE: No resources
+ * @MC_CMD_STATUS_NO_MEMORY: No memory available
+ * @MC_CMD_STATUS_BUSY: Device is busy
+ * @MC_CMD_STATUS_UNSUPPORTED_OP: Unsupported operation
+ * @MC_CMD_STATUS_INVALID_STATE: Invalid state
+ */
+enum mc_cmd_status {
+	MC_CMD_STATUS_OK = 0x0,
+	MC_CMD_STATUS_READY = 0x1,
+	MC_CMD_STATUS_AUTH_ERR = 0x3,
+	MC_CMD_STATUS_NO_PRIVILEGE = 0x4,
+	MC_CMD_STATUS_DMA_ERR = 0x5,
+	MC_CMD_STATUS_CONFIG_ERR = 0x6,
+	MC_CMD_STATUS_TIMEOUT = 0x7,
+	MC_CMD_STATUS_NO_RESOURCE = 0x8,
+	MC_CMD_STATUS_NO_MEMORY = 0x9,
+	MC_CMD_STATUS_BUSY = 0xA,
+	MC_CMD_STATUS_UNSUPPORTED_OP = 0xB,
+	MC_CMD_STATUS_INVALID_STATE = 0xC
+};
+
+/*  MC command flags */
+
+/**
+ * High priority flag
+ */
+#define MC_CMD_FLAG_PRI		0x00008000
+/**
+ * Command completion flag
+ */
+#define MC_CMD_FLAG_INTR_DIS	0x01000000
+
+/**
+ * Command ID field offset
+ */
+#define MC_CMD_HDR_CMDID_O	48
+/**
+ * Command ID field size
+ */
+#define MC_CMD_HDR_CMDID_S	16
+/**
+ * Token field offset
+ */
+#define MC_CMD_HDR_TOKEN_O	32
+/**
+ * Token field size
+ */
+#define MC_CMD_HDR_TOKEN_S	16
+/**
+ * Status field offset
+ */
+#define MC_CMD_HDR_STATUS_O	16
+/**
+ * Status field size
+ */
+#define MC_CMD_HDR_STATUS_S	8
+/**
+ * Flags field offset
+ */
+#define MC_CMD_HDR_FLAGS_O	0
+/**
+ * Flags field size
+ */
+#define MC_CMD_HDR_FLAGS_S	32
+/**
+ *  Command flags mask
+ */
+#define MC_CMD_HDR_FLAGS_MASK	0xFF00FF00
+
+#define MC_CMD_HDR_READ_STATUS(_hdr) \
+	((enum mc_cmd_status)mc_dec((_hdr), \
+		MC_CMD_HDR_STATUS_O, MC_CMD_HDR_STATUS_S))
+
+#define MC_CMD_HDR_READ_TOKEN(_hdr) \
+	((uint16_t)mc_dec((_hdr), MC_CMD_HDR_TOKEN_O, MC_CMD_HDR_TOKEN_S))
+
+#define MC_PREP_OP(_ext, _param, _offset, _width, _type, _arg) \
+	((_ext)[_param] |= cpu_to_le64(mc_enc((_offset), (_width), _arg)))
+
+#define MC_EXT_OP(_ext, _param, _offset, _width, _type, _arg) \
+	(_arg = (_type)mc_dec(cpu_to_le64(_ext[_param]), (_offset), (_width)))
+
+#define MC_CMD_OP(_cmd, _param, _offset, _width, _type, _arg) \
+	((_cmd).params[_param] |= mc_enc((_offset), (_width), _arg))
+
+#define MC_RSP_OP(_cmd, _param, _offset, _width, _type, _arg) \
+	(_arg = (_type)mc_dec(_cmd.params[_param], (_offset), (_width)))
+
+/* cmd, param, offset, width, type, arg_name */
+#define CMD_CREATE_RSP_GET_OBJ_ID_PARAM0(cmd, object_id) \
+	MC_RSP_OP(cmd, 0, 0,  32, uint32_t, object_id)
+
+/* cmd, param, offset, width, type, arg_name */
+#define CMD_DESTROY_SET_OBJ_ID_PARAM0(cmd, object_id) \
+	MC_CMD_OP(cmd, 0, 0,  32,  uint32_t,  object_id)
+
+static inline uint64_t mc_encode_cmd_header(uint16_t cmd_id,
+					    uint32_t cmd_flags,
+					    uint16_t token)
+{
+	uint64_t hdr;
+
+	hdr = mc_enc(MC_CMD_HDR_CMDID_O, MC_CMD_HDR_CMDID_S, cmd_id);
+	hdr |= mc_enc(MC_CMD_HDR_FLAGS_O, MC_CMD_HDR_FLAGS_S,
+		       (cmd_flags & MC_CMD_HDR_FLAGS_MASK));
+	hdr |= mc_enc(MC_CMD_HDR_TOKEN_O, MC_CMD_HDR_TOKEN_S, token);
+	hdr |= mc_enc(MC_CMD_HDR_STATUS_O, MC_CMD_HDR_STATUS_S,
+		       MC_CMD_STATUS_READY);
+
+	return hdr;
+}
+
+/**
+ * mc_write_command - writes a command to a Management Complex (MC) portal
+ *
+ * @portal: pointer to an MC portal
+ * @cmd: pointer to a filled command
+ */
+static inline void mc_write_command(struct mc_command __iomem *portal,
+				    struct mc_command *cmd)
+{
+	int i;
+	uint32_t word;
+
+	/* copy command parameters into the portal */
+	for (i = 0; i < MC_CMD_NUM_OF_PARAMS; i++)
+		iowrite64(cmd->params[i], &portal->params[i]);
+
+	/* submit the command by writing the header */
+	word = (uint32_t)mc_dec(cmd->header, 32, 32);
+	iowrite32(word, (((uint32_t *)&portal->header) + 1));
+
+	word = (uint32_t)mc_dec(cmd->header, 0, 32);
+	iowrite32(word, (uint32_t *)&portal->header);
+}
+
+/**
+ * mc_read_response - reads the response for the last MC command from a
+ * Management Complex (MC) portal
+ *
+ * @portal: pointer to an MC portal
+ * @resp: pointer to command response buffer
+ *
+ * Returns MC_CMD_STATUS_OK on Success; Error code otherwise.
+ */
+static inline enum mc_cmd_status mc_read_response(
+					struct mc_command __iomem *portal,
+					struct mc_command *resp)
+{
+	int i;
+	enum mc_cmd_status status;
+
+	/* Copy command response header from MC portal: */
+	resp->header = ioread64(&portal->header);
+	status = MC_CMD_HDR_READ_STATUS(resp->header);
+	if (status != MC_CMD_STATUS_OK)
+		return status;
+
+	/* Copy command response data from MC portal: */
+	for (i = 0; i < MC_CMD_NUM_OF_PARAMS; i++)
+		resp->params[i] = ioread64(&portal->params[i]);
+
+	return status;
+}
+
+#endif /* __FSL_MC_CMD_H */
diff --git a/drivers/bus/fslmc/mc/fsl_mc_sys.h b/drivers/bus/fslmc/mc/fsl_mc_sys.h
new file mode 100644
index 0000000..d9d43e5
--- /dev/null
+++ b/drivers/bus/fslmc/mc/fsl_mc_sys.h
@@ -0,0 +1,98 @@
+/* Copyright 2013-2015 Freescale 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 the above-listed copyright holders nor the
+ * names of any 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDERS OR CONTRIBUTORS 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.
+ */
+#ifndef _FSL_MC_SYS_H
+#define _FSL_MC_SYS_H
+
+#ifdef __linux_driver__
+
+#include <linux/errno.h>
+#include <asm/io.h>
+#include <linux/slab.h>
+
+struct fsl_mc_io {
+	void *regs;
+};
+
+#ifndef ENOTSUP
+#define ENOTSUP		95
+#endif
+
+#define ioread64(_p)	    readq(_p)
+#define iowrite64(_v, _p)   writeq(_v, _p)
+
+#else /* __linux_driver__ */
+
+#include <stdio.h>
+#include <libio.h>
+#include <stdint.h>
+#include <errno.h>
+#include <sys/uio.h>
+#include <linux/byteorder/little_endian.h>
+
+#define cpu_to_le64(x) __cpu_to_le64(x)
+#ifndef dmb
+#define dmb() {__asm__ __volatile__("" : : : "memory"); }
+#endif
+#define __iormb()       dmb()
+#define __iowmb()       dmb()
+#define __arch_getq(a)                  (*(volatile unsigned long *)(a))
+#define __arch_putq(v, a)                (*(volatile unsigned long *)(a) = (v))
+#define __arch_putq32(v, a)                (*(volatile unsigned int *)(a) = (v))
+#define readq(c)        \
+	({ uint64_t __v = __arch_getq(c); __iormb(); __v; })
+#define writeq(v, c)     \
+	({ uint64_t __v = v; __iowmb(); __arch_putq(__v, c); __v; })
+#define writeq32(v, c) \
+	({ uint32_t __v = v; __iowmb(); __arch_putq32(__v, c); __v; })
+#define ioread64(_p)	    readq(_p)
+#define iowrite64(_v, _p)   writeq(_v, _p)
+#define iowrite32(_v, _p)   writeq32(_v, _p)
+#define __iomem
+
+struct fsl_mc_io {
+	void *regs;
+};
+
+#ifndef ENOTSUP
+#define ENOTSUP		95
+#endif
+
+/*GPP is supposed to use MC commands with low priority*/
+#define CMD_PRI_LOW          0 /*!< Low Priority command indication */
+
+struct mc_command;
+
+int mc_send_command(struct fsl_mc_io *mc_io, struct mc_command *cmd);
+
+#endif /* __linux_driver__ */
+
+#endif /* _FSL_MC_SYS_H */
diff --git a/drivers/bus/fslmc/mc/mc_sys.c b/drivers/bus/fslmc/mc/mc_sys.c
new file mode 100644
index 0000000..c428624
--- /dev/null
+++ b/drivers/bus/fslmc/mc/mc_sys.c
@@ -0,0 +1,107 @@
+/* Copyright 2013-2015 Freescale 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 the above-listed copyright holders nor the
+ * names of any 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDERS OR CONTRIBUTORS 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 <fsl_mc_sys.h>
+#include <fsl_mc_cmd.h>
+
+#include <rte_spinlock.h>
+
+/** User space framework uses MC Portal in shared mode. Following change
+ * introduces lock in MC FLIB
+ */
+
+/**
+ * A static spinlock initializer.
+ */
+static rte_spinlock_t mc_portal_lock = RTE_SPINLOCK_INITIALIZER;
+
+static int mc_status_to_error(enum mc_cmd_status status)
+{
+	switch (status) {
+	case MC_CMD_STATUS_OK:
+		return 0;
+	case MC_CMD_STATUS_AUTH_ERR:
+		return -EACCES; /* Token error */
+	case MC_CMD_STATUS_NO_PRIVILEGE:
+		return -EPERM; /* Permission denied */
+	case MC_CMD_STATUS_DMA_ERR:
+		return -EIO; /* Input/Output error */
+	case MC_CMD_STATUS_CONFIG_ERR:
+		return -EINVAL; /* Device not configured */
+	case MC_CMD_STATUS_TIMEOUT:
+		return -ETIMEDOUT; /* Operation timed out */
+	case MC_CMD_STATUS_NO_RESOURCE:
+		return -ENAVAIL; /* Resource temporarily unavailable */
+	case MC_CMD_STATUS_NO_MEMORY:
+		return -ENOMEM; /* Cannot allocate memory */
+	case MC_CMD_STATUS_BUSY:
+		return -EBUSY; /* Device busy */
+	case MC_CMD_STATUS_UNSUPPORTED_OP:
+		return -ENOTSUP; /* Operation not supported by device */
+	case MC_CMD_STATUS_INVALID_STATE:
+		return -ENODEV; /* Invalid device state */
+	default:
+		break;
+	}
+
+	/* Not expected to reach here */
+	return -EINVAL;
+}
+
+int mc_send_command(struct fsl_mc_io *mc_io, struct mc_command *cmd)
+{
+	enum mc_cmd_status status;
+
+	if (!mc_io || !mc_io->regs)
+		return -EACCES;
+
+	/* --- Call lock function here in case portal is shared --- */
+	rte_spinlock_lock(&mc_portal_lock);
+
+	mc_write_command(mc_io->regs, cmd);
+
+	/* Spin until status changes */
+	do {
+		status = MC_CMD_HDR_READ_STATUS(ioread64(mc_io->regs));
+
+		/* --- Call wait function here to prevent blocking ---
+		 * Change the loop condition accordingly to exit on timeout.
+		 */
+	} while (status == MC_CMD_STATUS_READY);
+
+	/* Read the response back into the command buffer */
+	mc_read_response(mc_io->regs, cmd);
+
+	/* --- Call unlock function here in case portal is shared --- */
+	rte_spinlock_unlock(&mc_portal_lock);
+
+	return mc_status_to_error(status);
+}
-- 
1.9.1