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lib: utils/timer: Use heap in ACLINT MTIMER driver

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Let's use heap allocation in ACLINT MTIMER driver instead of using
a fixed size global array.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
This commit is contained in:
Anup Patel
2023-04-19 17:13:22 +05:30
committed by Anup Patel
parent 30137166c6
commit 7e5636ac37
1 changed files with 30 additions and 17 deletions
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47
lib/utils/timer/fdt_timer_mtimer.c
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@@ -9,44 +9,54 @@
#include <libfdt.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_heap.h>
#include <sbi/sbi_list.h>
#include <sbi_utils/fdt/fdt_helper.h>
#include <sbi_utils/timer/fdt_timer.h>
#include <sbi_utils/timer/aclint_mtimer.h>
#define MTIMER_MAX_NR 16
struct timer_mtimer_quirks {
unsigned int mtime_offset;
bool has_64bit_mmio;
bool without_mtime;
};
static unsigned long mtimer_count = 0;
static struct aclint_mtimer_data mtimer[MTIMER_MAX_NR];
struct timer_mtimer_node {
struct sbi_dlist head;
struct aclint_mtimer_data data;
};
static SBI_LIST_HEAD(mtn_list);
static struct aclint_mtimer_data *mt_reference = NULL;
static int timer_mtimer_cold_init(void *fdt, int nodeoff,
const struct fdt_match *match)
{
int i, rc;
int rc;
unsigned long addr[2], size[2];
struct timer_mtimer_node *mtn, *n;
struct aclint_mtimer_data *mt;
if (MTIMER_MAX_NR <= mtimer_count)
return SBI_ENOSPC;
mt = &mtimer[mtimer_count];
mtn = sbi_zalloc(sizeof(*mtn));
if (!mtn)
return SBI_ENOMEM;
mt = &mtn->data;
rc = fdt_parse_aclint_node(fdt, nodeoff, true,
&addr[0], &size[0], &addr[1], &size[1],
&mt->first_hartid, &mt->hart_count);
if (rc)
if (rc) {
sbi_free(mtn);
return rc;
}
mt->has_64bit_mmio = true;
mt->has_shared_mtime = false;
rc = fdt_parse_timebase_frequency(fdt, &mt->mtime_freq);
if (rc)
if (rc) {
sbi_free(mtn);
return rc;
}
if (match->data) { /* SiFive CLINT */
const struct timer_mtimer_quirks *quirks = match->data;
@@ -77,8 +87,8 @@ static int timer_mtimer_cold_init(void *fdt, int nodeoff,
/* Check if MTIMER device has shared MTIME address */
if (mt->mtime_size) {
mt->has_shared_mtime = false;
for (i = 0; i < mtimer_count; i++) {
if (mtimer[i].mtime_addr == mt->mtime_addr) {
sbi_list_for_each_entry(n, &mtn_list, head) {
if (n->data.mtime_addr == mt->mtime_addr) {
mt->has_shared_mtime = true;
break;
}
@@ -90,8 +100,10 @@ static int timer_mtimer_cold_init(void *fdt, int nodeoff,
/* Initialize the MTIMER device */
rc = aclint_mtimer_cold_init(mt, mt_reference);
if (rc)
if (rc) {
sbi_free(mtn);
return rc;
}
/*
* Select first MTIMER device with no associated HARTs as our
@@ -106,16 +118,17 @@ static int timer_mtimer_cold_init(void *fdt, int nodeoff,
* Set reference for already propbed MTIMER devices
* with non-shared MTIME
*/
for (i = 0; i < mtimer_count; i++)
if (!mtimer[i].has_shared_mtime)
aclint_mtimer_set_reference(&mtimer[i], mt);
sbi_list_for_each_entry(n, &mtn_list, head) {
if (!n->data.has_shared_mtime)
aclint_mtimer_set_reference(&n->data, mt);
}
}
/* Explicitly sync-up MTIMER devices not associated with any HARTs */
if (!mt->hart_count)
aclint_mtimer_sync(mt);
mtimer_count++;
sbi_list_add_tail(&mtn->head, &mtn_list);
return 0;
}