fsi: occ: Update response size to 8kb

Newer OCCs return more data.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Ninad Palsule <ninad@linux.ibm.com>
Link: https://patch.msgid.link/20251008152157.1387182-1-eajames@linux.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/fsi/fsi-occ.c b/drivers/fsi/fsi-occ.c
index d3e6bf37878a762653d57f00c5fc8db336a9ad3b..e41ef12fa0959a39745ad8930aa541775a37a8a0 100644 (file)
--- a/drivers/fsi/fsi-occ.c
+++ b/drivers/fsi/fsi-occ.c
@@ -22,9 +22,9 @@
 #include <linux/uaccess.h>
 #include <linux/unaligned.h>
 
-#define OCC_SRAM_BYTES         4096
-#define OCC_CMD_DATA_BYTES     4090
-#define OCC_RESP_DATA_BYTES    4089
+#define OCC_SRAM_BYTES         8192
+#define OCC_CMD_DATA_BYTES     8186
+#define OCC_RESP_DATA_BYTES    8185
 
 #define OCC_P9_SRAM_CMD_ADDR   0xFFFBE000
 #define OCC_P9_SRAM_RSP_ADDR   0xFFFBF000
@@ -86,7 +86,7 @@ static int occ_open(struct inode *inode, struct file *file)
        if (!client)
                return -ENOMEM;
 
-       client->buffer = (u8 *)__get_free_page(GFP_KERNEL);
+       client->buffer = kvmalloc(OCC_SRAM_BYTES, GFP_KERNEL);
        if (!client->buffer) {
                kfree(client);
                return -ENOMEM;
@@ -97,10 +97,6 @@ static int occ_open(struct inode *inode, struct file *file)
        file->private_data = client;
        get_device(occ->dev);
 
-       /* We allocate a 1-page buffer, make sure it all fits */
-       BUILD_BUG_ON((OCC_CMD_DATA_BYTES + 3) > PAGE_SIZE);
-       BUILD_BUG_ON((OCC_RESP_DATA_BYTES + 7) > PAGE_SIZE);
-
        return 0;
 }
 
@@ -176,7 +172,7 @@ static ssize_t occ_write(struct file *file, const char __user *buf,
        }
 
        /* Submit command; 4 bytes before the data and 2 bytes after */
-       rlen = PAGE_SIZE;
+       rlen = OCC_SRAM_BYTES;
        rc = fsi_occ_submit(client->occ->dev, cmd, data_length + 6, cmd,
                            &rlen);
        if (rc)
@@ -200,7 +196,7 @@ static int occ_release(struct inode *inode, struct file *file)
        struct occ_client *client = file->private_data;
 
        put_device(client->occ->dev);
-       free_page((unsigned long)client->buffer);
+       kvfree(client->buffer);
        kfree(client);
 
        return 0;