[dpdk-dev] [PATCH v2 02/14] crypto/caam_jr: add HW tuning options

[Gagandeep Singh <g.singh@nxp.com>]

caam_jr hardware can be tuned for multiple settings
like ring depth, coalescing, notification types, cache
size etc.

These parameter can be used for performance tuning
for various platforms.

Signed-off-by: Gagandeep Singh <g.singh@nxp.com>
Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
---
 drivers/crypto/caam_jr/caam_jr_config.h | 207 ++++++++++++++++++++++++
 1 file changed, 207 insertions(+)
 create mode 100644 drivers/crypto/caam_jr/caam_jr_config.h

diff --git a/drivers/crypto/caam_jr/caam_jr_config.h b/drivers/crypto/caam_jr/caam_jr_config.h
new file mode 100644
index 000000000..e7855cee6
--- /dev/null
+++ b/drivers/crypto/caam_jr/caam_jr_config.h
@@ -0,0 +1,207 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2017-2018 NXP
+ */
+
+#ifndef CAAM_JR_CONFIG_H
+#define CAAM_JR_CONFIG_H
+
+#include <rte_byteorder.h>
+
+#ifdef RTE_LIBRTE_PMD_CAAM_JR_BE
+#define CAAM_BYTE_ORDER __BIG_ENDIAN
+#else
+#define CAAM_BYTE_ORDER __LITTLE_ENDIAN
+#endif
+
+#if RTE_BYTE_ORDER == RTE_BIG_ENDIAN
+#define CORE_BYTE_ORDER __BIG_ENDIAN
+#else
+#define CORE_BYTE_ORDER __LITTLE_ENDIAN
+#endif
+
+typedef uint64_t	dma_addr_t;
+
+#if CORE_BYTE_ORDER != CAAM_BYTE_ORDER
+
+#define cpu_to_caam64 rte_cpu_to_be_64
+#define cpu_to_caam32 rte_cpu_to_be_32
+#else
+#define cpu_to_caam64
+#define cpu_to_caam32
+
+#endif
+
+/*
+ * SEC is configured to start work in polling mode,
+ * when configured for NAPI notification style.
+ */
+#define SEC_STARTUP_POLLING_MODE     0
+/*
+ * SEC is configured to start work in interrupt mode,
+ * when configured for NAPI notification style.
+ */
+#define SEC_STARTUP_INTERRUPT_MODE   1
+
+/*
+ * SEC driver will use NAPI model to receive notifications
+ * for processed packets from SEC engine hardware:
+ * - IRQ for low traffic
+ * - polling for high traffic.
+ */
+#define SEC_NOTIFICATION_TYPE_NAPI  0
+/*
+ * SEC driver will use ONLY interrupts to receive notifications
+ * for processed packets from SEC engine hardware.
+ */
+#define SEC_NOTIFICATION_TYPE_IRQ   1
+/*
+ * SEC driver will use ONLY polling to receive notifications
+ * for processed packets from SEC engine hardware.
+ */
+#define SEC_NOTIFICATION_TYPE_POLL  2
+
+/*
+ * SEC USER SPACE DRIVER related configuration.
+ */
+
+/*
+ * Determines how SEC user space driver will receive notifications
+ * for processed packets from SEC engine.
+ * Valid values are: #SEC_NOTIFICATION_TYPE_POLL, #SEC_NOTIFICATION_TYPE_IRQ
+ * and #SEC_NOTIFICATION_TYPE_NAPI.
+ */
+#define SEC_NOTIFICATION_TYPE   SEC_NOTIFICATION_TYPE_POLL
+
+/* Maximum number of job rings supported by SEC hardware */
+#define MAX_SEC_JOB_RINGS         4
+
+/* Maximum number of QP per job ring */
+#define RTE_CAAM_MAX_NB_SEC_QPS    1
+
+/*
+ * Size of cryptographic context that is used directly in communicating
+ * with SEC device. SEC device works only with physical addresses. This
+ * is the maximum size for a SEC descriptor ( = 64 words).
+ */
+#define SEC_CRYPTO_DESCRIPTOR_SIZE  256
+
+/*
+ * Size of job descriptor submitted to SEC device for each packet to
+ * be processed.
+ * Job descriptor contains 3 DMA address pointers:
+ *	- to shared descriptor, to input buffer and to output buffer.
+ * The job descriptor contains other SEC specific commands as well:
+ *	- HEADER command, SEQ IN PTR command SEQ OUT PTR command and opaque data
+ *      each measuring 4 bytes.
+ * Job descriptor size, depending on physical address representation:
+ *	- 32 bit - size is 28 bytes - cacheline-aligned size is 64 bytes
+ *	- 36 bit - size is 40 bytes - cacheline-aligned size is 64 bytes
+ * @note: Job descriptor must be cacheline-aligned to ensure efficient
+ *	memory access.
+ * @note: If other format is used for job descriptor, then the size must be
+ *	revised.
+ */
+#define SEC_JOB_DESCRIPTOR_SIZE     64
+
+/*
+ * Size of one entry in the input ring of a job ring.
+ * Input ring contains pointers to job descriptors.
+ * The memory used for an input ring and output ring must be physically
+ * contiguous.
+ */
+#define SEC_JOB_INPUT_RING_ENTRY_SIZE  sizeof(dma_addr_t)
+
+/*
+ * Size of one entry in the output ring of a job ring.
+ * Output ring entry is a pointer to a job descriptor followed by a 4 byte
+ * status word.
+ * The memory used for an input ring and output ring must be physically
+ * contiguous.
+ * @note If desired to use also the optional SEQ OUT indication in output ring
+ * entries,
+ * then 4 more bytes must be added to the size.
+ */
+#define SEC_JOB_OUTPUT_RING_ENTRY_SIZE  (SEC_JOB_INPUT_RING_ENTRY_SIZE + 4)
+
+/*
+ * DMA memory required for an input ring of a job ring.
+ */
+#define SEC_DMA_MEM_INPUT_RING_SIZE     ((SEC_JOB_INPUT_RING_ENTRY_SIZE) * \
+					(SEC_JOB_RING_SIZE))
+
+/*
+ * DMA memory required for an output ring of a job ring.
+ *  Required extra 4 byte for status word per each entry.
+ */
+#define SEC_DMA_MEM_OUTPUT_RING_SIZE    ((SEC_JOB_OUTPUT_RING_ENTRY_SIZE) * \
+					(SEC_JOB_RING_SIZE))
+
+/* DMA memory required for a job ring, including both input and output rings. */
+#define SEC_DMA_MEM_JOB_RING_SIZE       ((SEC_DMA_MEM_INPUT_RING_SIZE) + \
+					(SEC_DMA_MEM_OUTPUT_RING_SIZE))
+
+/*
+ * When calling sec_init() UA will provide an area of virtual memory
+ *  of size #SEC_DMA_MEMORY_SIZE to be  used internally by the driver
+ *  to allocate data (like SEC descriptors) that needs to be passed to
+ *  SEC device in physical addressing and later on retrieved from SEC device.
+ *  At initialization the UA provides specialized ptov/vtop functions/macros to
+ *  translate addresses allocated from this memory area.
+ */
+#define SEC_DMA_MEMORY_SIZE          ((SEC_DMA_MEM_JOB_RING_SIZE) * \
+					(MAX_SEC_JOB_RINGS))
+
+#define L1_CACHE_BYTES 64
+
+/* SEC JOB RING related configuration. */
+
+/*
+ * Configure the size of the JOB RING.
+ * The maximum size of the ring in hardware limited to 1024.
+ * However the number of packets in flight in a time interval of 1ms can
+ * be calculated from the traffic rate (Mbps) and packet size.
+ * Here it was considered a packet size of 64 bytes.
+ *
+ * @note Round up to nearest power of 2 for optimized update
+ * of producer/consumer indexes of each job ring
+ */
+#define SEC_JOB_RING_SIZE     512
+
+/*
+ * Interrupt coalescing related configuration.
+ * NOTE: SEC hardware enabled interrupt
+ * coalescing is not supported on SEC version 3.1!
+ * SEC version 4.4 has support for interrupt
+ * coalescing.
+ */
+
+#if SEC_NOTIFICATION_TYPE != SEC_NOTIFICATION_TYPE_POLL
+
+#define SEC_INT_COALESCING_ENABLE   1
+/*
+ * Interrupt Coalescing Descriptor Count Threshold.
+ * While interrupt coalescing is enabled (ICEN=1), this value determines
+ * how many Descriptors are completed before raising an interrupt.
+ *
+ * Valid values for this field are from 0 to 255.
+ * Note that a value of 1 functionally defeats the advantages of interrupt
+ * coalescing since the threshold value is reached each time that a
+ * Job Descriptor is completed. A value of 0 is treated in the same
+ * manner as a value of 1.
+ */
+#define SEC_INTERRUPT_COALESCING_DESCRIPTOR_COUNT_THRESH  10
+
+/*
+ * Interrupt Coalescing Timer Threshold.
+ * While interrupt coalescing is enabled (ICEN=1), this value determines the
+ * maximum amount of time after processing a Descriptor before raising an
+ * interrupt.
+ * The threshold value is represented in units equal to 64 CAAM interface
+ * clocks. Valid values for this field are from 1 to 65535.
+ * A value of 0 results in behavior identical to that when interrupt
+ * coalescing is disabled.
+ */
+#define SEC_INTERRUPT_COALESCING_TIMER_THRESH  100
+#endif /* SEC_NOTIFICATION_TYPE_POLL */
+
+#endif /* CAAM_JR_CONFIG_H */
-- 
2.17.1