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platform/x86/amd/hsmp: Convert amd_hsmp_rdwr() to a function pointer

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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@amd.com>
Reviewed-by: Naveen Krishna Chatradhi <naveenkrishna.chatradhi@amd.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20241021111428.2676884-3-suma.hegde@amd.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Suma Hegde 2024-10-21 11:14:20 +00:00 committed by Ilpo Järvinen
parent 1e1c4c0ab3
commit d9a621ebdd
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GPG Key ID: 59AC4F6153E5CE31
1 changed files with 12 additions and 18 deletions
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30
drivers/platform/x86/amd/hsmp/hsmp.c
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@ -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