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Wed, 8 Oct 2025 15:22:04 +0000 (GMT) From: Eddie James To: linux-fsi@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org, ninad@linux.ibm.com, gregkh@linuxfoundation.org, Eddie James Subject: [PATCH] fsi: occ: Update response size to 8kb Date: Wed, 8 Oct 2025 10:21:57 -0500 Message-ID: <20251008152157.1387182-1-eajames@linux.ibm.com> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=XvT3+FF9 c=1 sm=1 tr=0 ts=68e6819e cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=x6icFKpwvdMA:10 a=VnNF1IyMAAAA:8 a=BGEI4LeKWJWrEHHieJQA:9 X-Proofpoint-ORIG-GUID: 79DBqFNqAHcOAnbqWpZrf-vtaGmVNxAt X-Proofpoint-GUID: 79DBqFNqAHcOAnbqWpZrf-vtaGmVNxAt X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMDA0MDAwOSBTYWx0ZWRfX9qTd3flEXHex MPUnhkTcwCXbETfxBv0e4dt5ECKUV60PHTXZcqBn7GVCOJy33wP50uI7dcL9dTxkpVpVxaBphSF 5GdOxa9XwbofqkLU35HSAhgrNvWQuTkq/uzH4c8aCklNmBbaWZiB7BiSU60Mn5BUUI94c+TdR/r 8RFqfqnheztVHpaK9FGA3+VIjRFXv9xKaGYxT4CI1KE6bZR2C0YYLV4Saqz5AVNxmYlWVWPXY77 WF3QBsTmw1ZtrPK+/u4IMsf2o+CI4v42zSLVae7rJrfONQFlrK9sGSdfDlCeA+64iVp6Cxb7Vmm 5n2rLo77WWijXqOdZ+y6oAfIKRszypUEFPFz+5sfRHu0S4m7V4lWsM93AdmD9F7LFpFtdFttSH4 2amHZ0wSe2UnE7kO8mUzUIm/kJWukA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-10-08_04,2025-10-06_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 malwarescore=0 spamscore=0 lowpriorityscore=0 suspectscore=0 phishscore=0 priorityscore=1501 clxscore=1011 adultscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2509150000 definitions=main-2510040009 Content-Type: text/plain; charset="utf-8" Newer OCCs return more data. Signed-off-by: Eddie James Reviewed-by: Ninad Palsule --- drivers/fsi/fsi-occ.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/drivers/fsi/fsi-occ.c b/drivers/fsi/fsi-occ.c index d3e6bf37878a7..e41ef12fa0959 100644 --- a/drivers/fsi/fsi-occ.c +++ b/drivers/fsi/fsi-occ.c @@ -22,9 +22,9 @@ #include #include =20 -#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 =20 #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 *fil= e) if (!client) return -ENOMEM; =20 - client->buffer =3D (u8 *)__get_free_page(GFP_KERNEL); + client->buffer =3D 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 *fi= le) file->private_data =3D client; get_device(occ->dev); =20 - /* 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; } =20 @@ -176,7 +172,7 @@ static ssize_t occ_write(struct file *file, const char = __user *buf, } =20 /* Submit command; 4 bytes before the data and 2 bytes after */ - rlen =3D PAGE_SIZE; + rlen =3D OCC_SRAM_BYTES; rc =3D 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 =3D file->private_data; =20 put_device(client->occ->dev); - free_page((unsigned long)client->buffer); + kvfree(client->buffer); kfree(client); =20 return 0; --=20 2.51.0