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/*
* Copyright 2021 NXP
*
* SPDX-License-Identifier: BSD-3-Clause
*
*/
#include <errno.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <arch_helpers.h>
#include "caam.h"
#include <common/debug.h>
#include "jobdesc.h"
#include "nxp_timer.h"
#include "sec_hw_specific.h"
#include "sec_jr_driver.h"
/* Job rings used for communication with SEC HW */
struct sec_job_ring_t g_job_rings[MAX_SEC_JOB_RINGS];
/* The current state of SEC user space driver */
volatile sec_driver_state_t g_driver_state = SEC_DRIVER_STATE_IDLE;
int g_job_rings_no;
uint8_t ip_ring[SEC_DMA_MEM_INPUT_RING_SIZE] __aligned(CACHE_WRITEBACK_GRANULE);
uint8_t op_ring[SEC_DMA_MEM_OUTPUT_RING_SIZE] __aligned(CACHE_WRITEBACK_GRANULE);
void *init_job_ring(uint8_t jr_mode,
uint16_t irq_coalescing_timer,
uint8_t irq_coalescing_count,
void *reg_base_addr, uint32_t irq_id)
{
struct sec_job_ring_t *job_ring = &g_job_rings[g_job_rings_no++];
int ret = 0;
job_ring->register_base_addr = reg_base_addr;
job_ring->jr_mode = jr_mode;
job_ring->irq_fd = irq_id;
job_ring->input_ring = vtop(ip_ring);
memset(job_ring->input_ring, 0, SEC_DMA_MEM_INPUT_RING_SIZE);
job_ring->output_ring = (struct sec_outring_entry *)vtop(op_ring);
memset(job_ring->output_ring, 0, SEC_DMA_MEM_OUTPUT_RING_SIZE);
dsb();
#if defined(SEC_MEM_NON_COHERENT) && defined(IMAGE_BL2)
flush_dcache_range((uintptr_t)(job_ring->input_ring),
SEC_DMA_MEM_INPUT_RING_SIZE),
flush_dcache_range((uintptr_t)(job_ring->output_ring),
SEC_DMA_MEM_OUTPUT_RING_SIZE),
dmbsy();
#endif
/* Reset job ring in SEC hw and configure job ring registers */
ret = hw_reset_job_ring(job_ring);
if (ret != 0) {
ERROR("Failed to reset hardware job ring\n");
return NULL;
}
if (jr_mode == SEC_NOTIFICATION_TYPE_IRQ) {
/* Enable IRQ if driver work sin interrupt mode */
ERROR("Enabling DONE IRQ generation on job ring\n");
ret = jr_enable_irqs(job_ring);
if (ret != 0) {
ERROR("Failed to enable irqs for job ring\n");
return NULL;
}
}
if ((irq_coalescing_timer != 0) || (irq_coalescing_count != 0)) {
hw_job_ring_set_coalescing_param(job_ring,
irq_coalescing_timer,
irq_coalescing_count);
hw_job_ring_enable_coalescing(job_ring);
job_ring->coalescing_en = 1;
}
job_ring->jr_state = SEC_JOB_RING_STATE_STARTED;
return job_ring;
}
int sec_release(void)
{
int i;
/* Validate driver state */
if (g_driver_state == SEC_DRIVER_STATE_RELEASE) {
ERROR("Driver release is already in progress");
return SEC_DRIVER_RELEASE_IN_PROGRESS;
}
/* Update driver state */
g_driver_state = SEC_DRIVER_STATE_RELEASE;
/* If any descriptors in flight , poll and wait
* until all descriptors are received and silently discarded.
*/
flush_job_rings();
for (i = 0; i < g_job_rings_no; i++) {
shutdown_job_ring(&g_job_rings[i]);
}
g_job_rings_no = 0;
g_driver_state = SEC_DRIVER_STATE_IDLE;
return SEC_SUCCESS;
}
int sec_jr_lib_init(void)
{
/* Validate driver state */
if (g_driver_state != SEC_DRIVER_STATE_IDLE) {
ERROR("Driver already initialized\n");
return 0;
}
memset(g_job_rings, 0, sizeof(g_job_rings));
g_job_rings_no = 0;
/* Update driver state */
g_driver_state = SEC_DRIVER_STATE_STARTED;
return 0;
}
int dequeue_jr(void *job_ring_handle, int32_t limit)
{
int ret = 0;
int notified_descs_no = 0;
struct sec_job_ring_t *job_ring = (sec_job_ring_t *) job_ring_handle;
uint64_t start_time;
/* Validate driver state */
if (g_driver_state != SEC_DRIVER_STATE_STARTED) {
ERROR("Driver release in progress or driver not initialized\n");
return -1;
}
/* Validate input arguments */
if (job_ring == NULL) {
ERROR("job_ring_handle is NULL\n");
return -1;
}
if (((limit == 0) || (limit > SEC_JOB_RING_SIZE))) {
ERROR("Invalid limit parameter configuration\n");
return -1;
}
VERBOSE("JR Polling limit[%d]\n", limit);
/* Poll job ring
* If limit < 0 -> poll JR until no more notifications are available.
* If limit > 0 -> poll JR until limit is reached.
*/
start_time = get_timer_val(0);
while (notified_descs_no == 0) {
/* Run hw poll job ring */
notified_descs_no = hw_poll_job_ring(job_ring, limit);
if (notified_descs_no < 0) {
ERROR("Error polling SEC engine job ring ");
return notified_descs_no;
}
VERBOSE("Jobs notified[%d]. ", notified_descs_no);
if (get_timer_val(start_time) >= CAAM_TIMEOUT) {
break;
}
}
if (job_ring->jr_mode == SEC_NOTIFICATION_TYPE_IRQ) {
/* Always enable IRQ generation when in pure IRQ mode */
ret = jr_enable_irqs(job_ring);
if (ret != 0) {
ERROR("Failed to enable irqs for job ring");
return ret;
}
}
return notified_descs_no;
}
int enq_jr_desc(void *job_ring_handle, struct job_descriptor *jobdescr)
{
struct sec_job_ring_t *job_ring;
job_ring = (struct sec_job_ring_t *)job_ring_handle;
/* Validate driver state */
if (g_driver_state != SEC_DRIVER_STATE_STARTED) {
ERROR("Driver release in progress or driver not initialized\n");
return -1;
}
/* Check job ring state */
if (job_ring->jr_state != SEC_JOB_RING_STATE_STARTED) {
ERROR("Job ring is currently resetting\n");
return -1;
}
if (SEC_JOB_RING_IS_FULL(job_ring->pidx, job_ring->cidx,
SEC_JOB_RING_SIZE, SEC_JOB_RING_SIZE)) {
ERROR("Job ring is full\n");
return -1;
}
/* Set ptr in input ring to current descriptor */
sec_write_addr(&job_ring->input_ring[job_ring->pidx],
(phys_addr_t) vtop(jobdescr->desc));
dsb();
#if defined(SEC_MEM_NON_COHERENT) && defined(IMAGE_BL2)
flush_dcache_range((uintptr_t)(&job_ring->input_ring[job_ring->pidx]),
sizeof(phys_addr_t));
inv_dcache_range((uintptr_t)(&job_ring->output_ring[job_ring->cidx]),
sizeof(struct sec_outring_entry));
dmbsy();
#endif
/* Notify HW that a new job is enqueued */
hw_enqueue_desc_on_job_ring(
(struct jobring_regs *)job_ring->register_base_addr, 1);
/* increment the producer index for the current job ring */
job_ring->pidx = SEC_CIRCULAR_COUNTER(job_ring->pidx,
SEC_JOB_RING_SIZE);
return 0;
}
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