This is in preparation to ACPI, Non-ACPI split.
amd_hsmp_rdwr() is used to access HSMP protocol registers.
ACPI and Non-ACPI use different methods to access these registers.
Now that code is split and common functionality is kept in hsmp.c
we need to define a function pointer to handle these functions separately.
Signed-off-by: Suma Hegde <suma.hegde@xxxxxxx>
Reviewed-by: Naveen Krishna Chatradhi <naveenkrishna.chatradhi@xxxxxxx>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
---
Changes since v4:
Add "Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>".
Changes since v3:
New patch created out of 7th patch in v3 series, to address the review comment.
drivers/platform/x86/amd/hsmp/hsmp.c | 30 +++++++++++-----------------
1 file changed, 12 insertions(+), 18 deletions(-)
diff --git a/drivers/platform/x86/amd/hsmp/hsmp.c b/drivers/platform/x86/amd/hsmp/hsmp.c
index 10ab9b2437f1..6d0c58c6a82f 100644
--- a/drivers/platform/x86/amd/hsmp/hsmp.c
+++ b/drivers/platform/x86/amd/hsmp/hsmp.c
@@ -82,6 +82,7 @@ struct hsmp_socket {
struct pci_dev *root;
struct device *dev;
u16 sock_ind;
+ int (*amd_hsmp_rdwr)(struct hsmp_socket *sock, u32 off, u32 *val, bool rw);
};
struct hsmp_plat_device {
@@ -114,22 +115,13 @@ static int amd_hsmp_pci_rdwr(struct hsmp_socket *sock, u32 offset,
return ret;
}
-static void amd_hsmp_acpi_rdwr(struct hsmp_socket *sock, u32 offset,
- u32 *value, bool write)
+static int amd_hsmp_acpi_rdwr(struct hsmp_socket *sock, u32 offset,
+ u32 *value, bool write)
{
if (write)
iowrite32(*value, sock->virt_base_addr + offset);
else
*value = ioread32(sock->virt_base_addr + offset);
-}
-
-static int amd_hsmp_rdwr(struct hsmp_socket *sock, u32 offset,
- u32 *value, bool write)
-{
- if (plat_dev.is_acpi_device)
- amd_hsmp_acpi_rdwr(sock, offset, value, write);
- else
- return amd_hsmp_pci_rdwr(sock, offset, value, write);
return 0;
}
@@ -156,7 +148,7 @@ static int __hsmp_send_message(struct hsmp_socket *sock, struct hsmp_message *ms
/* Clear the status register */
mbox_status = HSMP_STATUS_NOT_READY;
- ret = amd_hsmp_rdwr(sock, mbinfo->msg_resp_off, &mbox_status, HSMP_WR);
+ ret = sock->amd_hsmp_rdwr(sock, mbinfo->msg_resp_off, &mbox_status, HSMP_WR);
if (ret) {
pr_err("Error %d clearing mailbox status register\n", ret);
return ret;
@@ -165,8 +157,8 @@ static int __hsmp_send_message(struct hsmp_socket *sock, struct hsmp_message *ms
index = 0;
/* Write any message arguments */
while (index < msg->num_args) {
- ret = amd_hsmp_rdwr(sock, mbinfo->msg_arg_off + (index << 2),
- &msg->args[index], HSMP_WR);
+ ret = sock->amd_hsmp_rdwr(sock, mbinfo->msg_arg_off + (index << 2),
+ &msg->args[index], HSMP_WR);
if (ret) {
pr_err("Error %d writing message argument %d\n", ret, index);
return ret;
@@ -175,7 +167,7 @@ static int __hsmp_send_message(struct hsmp_socket *sock, struct hsmp_message *ms
}
/* Write the message ID which starts the operation */
- ret = amd_hsmp_rdwr(sock, mbinfo->msg_id_off, &msg->msg_id, HSMP_WR);
+ ret = sock->amd_hsmp_rdwr(sock, mbinfo->msg_id_off, &msg->msg_id, HSMP_WR);
if (ret) {
pr_err("Error %d writing message ID %u\n", ret, msg->msg_id);
return ret;
@@ -192,7 +184,7 @@ static int __hsmp_send_message(struct hsmp_socket *sock, struct hsmp_message *ms
timeout = jiffies + msecs_to_jiffies(HSMP_MSG_TIMEOUT);
while (time_before(jiffies, timeout)) {
- ret = amd_hsmp_rdwr(sock, mbinfo->msg_resp_off, &mbox_status, HSMP_RD);
+ ret = sock->amd_hsmp_rdwr(sock, mbinfo->msg_resp_off, &mbox_status, HSMP_RD);
if (ret) {
pr_err("Error %d reading mailbox status\n", ret);
return ret;
@@ -227,8 +219,8 @@ static int __hsmp_send_message(struct hsmp_socket *sock, struct hsmp_message *ms
*/
index = 0;
while (index < msg->response_sz) {
- ret = amd_hsmp_rdwr(sock, mbinfo->msg_arg_off + (index << 2),
- &msg->args[index], HSMP_RD);
+ ret = sock->amd_hsmp_rdwr(sock, mbinfo->msg_arg_off + (index << 2),
+ &msg->args[index], HSMP_RD);
if (ret) {
pr_err("Error %d reading response %u for message ID:%u\n",
ret, index, msg->msg_id);
@@ -545,6 +537,7 @@ static int hsmp_parse_acpi_table(struct device *dev, u16 sock_ind)
sock->sock_ind = sock_ind;
sock->dev = dev;
+ sock->amd_hsmp_rdwr = amd_hsmp_acpi_rdwr;
plat_dev.is_acpi_device = true;
sema_init(&sock->hsmp_sem, 1);
@@ -756,6 +749,7 @@ static int init_platform_device(struct device *dev)
sock->sock_ind = i;
sock->dev = dev;
sock->mbinfo.base_addr = SMN_HSMP_BASE;
+ sock->amd_hsmp_rdwr = amd_hsmp_pci_rdwr;
/*
* This is a transitional change from non-ACPI to ACPI, only
--
2.25.1
