lib: sbi: Simplify ipi platform operations

Instead of having ipi_send() and ipi_clear() callbacks in
platform operations, it will be much simpler for ipi driver
to directly register these operations as a device to sbi_ipi
implementation.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

3 files changed, 17 insertions, 25 deletions

diff --git a/lib/utils/ipi/fdt_ipi.c b/lib/utils/ipi/fdt_ipi.c
index 6562469..efca37e 100644
--- a/lib/utils/ipi/fdt_ipi.c
+++ b/lib/utils/ipi/fdt_ipi.c
@@ -17,35 +17,15 @@ static struct fdt_ipi *ipi_drivers[] = {
 	&fdt_ipi_clint
 };
 
-static void dummy_send(u32 target_hart)
-{
-}
-
-static void dummy_clear(u32 target_hart)
-{
-}
-
 static struct fdt_ipi dummy = {
 	.match_table = NULL,
 	.cold_init = NULL,
 	.warm_init = NULL,
 	.exit = NULL,
-	.send = dummy_send,
-	.clear = dummy_clear
 };
 
 static struct fdt_ipi *current_driver = &dummy;
 
-void fdt_ipi_send(u32 target_hart)
-{
-	current_driver->send(target_hart);
-}
-
-void fdt_ipi_clear(u32 target_hart)
-{
-	current_driver->clear(target_hart);
-}
-
 void fdt_ipi_exit(void)
 {
 	if (current_driver->exit)
diff --git a/lib/utils/ipi/fdt_ipi_clint.c b/lib/utils/ipi/fdt_ipi_clint.c
index e799fd7..529f978 100644
--- a/lib/utils/ipi/fdt_ipi_clint.c
+++ b/lib/utils/ipi/fdt_ipi_clint.c
@@ -45,6 +45,4 @@ struct fdt_ipi fdt_ipi_clint = {
 	.cold_init = ipi_clint_cold_init,
 	.warm_init = clint_warm_ipi_init,
 	.exit = NULL,
-	.send = clint_ipi_send,
-	.clear = clint_ipi_clear,
 };
diff --git a/lib/utils/sys/clint.c b/lib/utils/sys/clint.c
index 4b1963a..e8c2bd9 100644
--- a/lib/utils/sys/clint.c
+++ b/lib/utils/sys/clint.c
@@ -13,6 +13,7 @@
 #include <sbi/sbi_domain.h>
 #include <sbi/sbi_error.h>
 #include <sbi/sbi_hartmask.h>
+#include <sbi/sbi_ipi.h>
 #include <sbi/sbi_timer.h>
 #include <sbi_utils/sys/clint.h>
 
@@ -27,7 +28,7 @@
 
 static struct clint_data *clint_ipi_hartid2data[SBI_HARTMASK_MAX_BITS];
 
-void clint_ipi_send(u32 target_hart)
+static void clint_ipi_send(u32 target_hart)
 {
 	struct clint_data *clint;
 
@@ -41,7 +42,7 @@ void clint_ipi_send(u32 target_hart)
 	writel(1, &clint->ipi[target_hart - clint->first_hartid]);
 }
 
-void clint_ipi_clear(u32 target_hart)
+static void clint_ipi_clear(u32 target_hart)
 {
 	struct clint_data *clint;
 
@@ -55,6 +56,12 @@ void clint_ipi_clear(u32 target_hart)
 	writel(0, &clint->ipi[target_hart - clint->first_hartid]);
 }
 
+static struct sbi_ipi_device clint_ipi = {
+	.name = "clint",
+	.ipi_send = clint_ipi_send,
+	.ipi_clear = clint_ipi_clear
+};
+
 int clint_warm_ipi_init(void)
 {
 	/* Clear CLINT IPI for current HART */
@@ -66,6 +73,7 @@ int clint_warm_ipi_init(void)
 int clint_cold_ipi_init(struct clint_data *clint)
 {
 	u32 i;
+	int rc;
 	struct sbi_domain_memregion reg;
 
 	if (!clint)
@@ -82,7 +90,13 @@ int clint_cold_ipi_init(struct clint_data *clint)
 	sbi_domain_memregion_init(clint->addr + CLINT_IPI_OFF,
 				  CLINT_IPI_SIZE,
 				  SBI_DOMAIN_MEMREGION_MMIO, &reg);
-	return sbi_domain_root_add_memregion(&reg);
+	rc = sbi_domain_root_add_memregion(&reg);
+	if (rc)
+		return rc;
+
+	sbi_ipi_set_device(&clint_ipi);
+
+	return 0;
 }
 
 static struct clint_data *clint_timer_hartid2data[SBI_HARTMASK_MAX_BITS];