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Violators will be prosecuted; Thu, 11 May 2017 17:01:39 -0400 Received: from b01ledav006.gho.pok.ibm.com (b01ledav006.gho.pok.ibm.com [9.57.199.111]) by b01cxnp22035.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v4BL1c3u62783504; Thu, 11 May 2017 21:01:38 GMT Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 243EDAC03A; Thu, 11 May 2017 17:01:28 -0400 (EDT) Received: from christophersmbp.austin.ibm.com (unknown [9.41.175.240]) by b01ledav006.gho.pok.ibm.com (Postfix) with ESMTP id 0D022AC051; Thu, 11 May 2017 17:01:26 -0400 (EDT) From: Christopher Bostic To: robh+dt@kernel.org, mark.rutland@arm.com, linux@armlinux.org.uk, rostedt@goodmis.org, mingo@redhat.com, gregkh@linuxfoundation.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v7 15/23] drivers/fsi: expose direct-access slave API Date: Thu, 11 May 2017 16:00:52 -0500 X-Mailer: git-send-email 2.10.1 (Apple Git-78) In-Reply-To: <20170511210101.78409-1-cbostic@linux.vnet.ibm.com> References: <20170511210101.78409-1-cbostic@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17051121-0052-0000-0000-000001FB34A2 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007048; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000211; SDB=6.00859255; UDB=6.00425867; IPR=6.00638773; BA=6.00005345; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00015417; XFM=3.00000015; UTC=2017-05-11 21:01:42 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17051121-0053-0000-0000-0000508A46D7 Message-Id: <20170511210101.78409-16-cbostic@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-05-11_17:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1705110114 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170511_140202_250886_B50B97ED X-CRM114-Status: UNSURE ( 9.79 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Christopher Bostic , andrew@aj.id.au, alistair@popple.id.au, linux-kernel@vger.kernel.org, Jeremy Kerr , benh@kernel.crashing.org, joel@jms.id.au MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jeremy Kerr Allow drivers to access the slave address ranges. Signed-off-by: Jeremy Kerr Signed-off-by: Joel Stanley Signed-off-by: Christopher Bostic --- drivers/fsi/fsi-core.c | 26 ++++++++++++++++++++------ include/linux/fsi.h | 12 ++++++++++++ 2 files changed, 32 insertions(+), 6 deletions(-) diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c index 626cc06..d319f67 100644 --- a/drivers/fsi/fsi-core.c +++ b/drivers/fsi/fsi-core.c @@ -78,10 +78,6 @@ static int fsi_master_read(struct fsi_master *master, int link, uint8_t slave_id, uint32_t addr, void *val, size_t size); static int fsi_master_write(struct fsi_master *master, int link, uint8_t slave_id, uint32_t addr, const void *val, size_t size); -static int fsi_slave_read(struct fsi_slave *slave, uint32_t addr, - void *val, size_t size); -static int fsi_slave_write(struct fsi_slave *slave, uint32_t addr, - const void *val, size_t size); /* * fsi_device_read() / fsi_device_write() / fsi_device_peek() @@ -174,7 +170,7 @@ static int fsi_slave_calc_addr(struct fsi_slave *slave, uint32_t *addrp, return 0; } -static int fsi_slave_read(struct fsi_slave *slave, uint32_t addr, +int fsi_slave_read(struct fsi_slave *slave, uint32_t addr, void *val, size_t size) { uint8_t id = slave->id; @@ -188,7 +184,7 @@ static int fsi_slave_read(struct fsi_slave *slave, uint32_t addr, addr, val, size); } -static int fsi_slave_write(struct fsi_slave *slave, uint32_t addr, +int fsi_slave_write(struct fsi_slave *slave, uint32_t addr, const void *val, size_t size) { uint8_t id = slave->id; @@ -202,6 +198,24 @@ static int fsi_slave_write(struct fsi_slave *slave, uint32_t addr, addr, val, size); } +extern int fsi_slave_claim_range(struct fsi_slave *slave, + uint32_t addr, uint32_t size) +{ + if (addr + size < addr) + return -EINVAL; + + if (addr + size > slave->size) + return -EINVAL; + + /* todo: check for overlapping claims */ + return 0; +} + +extern void fsi_slave_release_range(struct fsi_slave *slave, + uint32_t addr, uint32_t size) +{ +} + static int fsi_slave_scan(struct fsi_slave *slave) { uint32_t engine_addr; diff --git a/include/linux/fsi.h b/include/linux/fsi.h index 34f1e9a..141fd38 100644 --- a/include/linux/fsi.h +++ b/include/linux/fsi.h @@ -66,6 +66,18 @@ struct fsi_driver { module_driver(__fsi_driver, fsi_driver_register, \ fsi_driver_unregister) +/* direct slave API */ +extern int fsi_slave_claim_range(struct fsi_slave *slave, + uint32_t addr, uint32_t size); +extern void fsi_slave_release_range(struct fsi_slave *slave, + uint32_t addr, uint32_t size); +extern int fsi_slave_read(struct fsi_slave *slave, uint32_t addr, + void *val, size_t size); +extern int fsi_slave_write(struct fsi_slave *slave, uint32_t addr, + const void *val, size_t size); + + + extern struct bus_type fsi_bus_type; #endif /* LINUX_FSI_H */