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Date:   Tue, 29 Dec 2020 10:57:15 +0800
From:   kernel test robot <lkp@...el.com>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>
Subject: drivers/tty/serial/ucc_uart.c:264:21: sparse: sparse: incorrect type
 in argument 1 (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   dea8dcf2a9fa8cc540136a6cd885c3beece16ec3
commit: 894fa235eb4ca0bfa692dbe4932c2f940cdc8c1e powerpc: inline iomap accessors
date:   4 weeks ago
config: powerpc64-randconfig-s031-20201223 (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-184-g1b896707-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=894fa235eb4ca0bfa692dbe4932c2f940cdc8c1e
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 894fa235eb4ca0bfa692dbe4932c2f940cdc8c1e
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=powerpc64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>


"sparse warnings: (new ones prefixed by >>)"
>> drivers/tty/serial/ucc_uart.c:264:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:264:21: sparse:     expected void const [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:264:21: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:268:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:268:21: sparse:     expected void const [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:268:21: sparse:     got restricted __be16 *
>> drivers/tty/serial/ucc_uart.c:347:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:347:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:347:17: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:348:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:348:17: sparse:     expected void const [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:348:17: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:348:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:348:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:348:17: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:350:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:350:21: sparse:     expected void const [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:350:21: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:369:18: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:369:18: sparse:     expected void const [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:369:18: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:382:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:382:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:382:17: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:383:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:383:17: sparse:     expected void const [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:383:17: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:383:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:383:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:383:17: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:386:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:386:21: sparse:     expected void const [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:386:21: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:474:26: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:474:26: sparse:     expected void const [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:474:26: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:481:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:481:21: sparse:     expected void const [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:481:21: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:512:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:512:17: sparse:     expected void const [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:512:17: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:512:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:512:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:512:17: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:515:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:515:21: sparse:     expected void const [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:515:21: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:604:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:604:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:604:17: sparse:     got restricted __be16 *
>> drivers/tty/serial/ucc_uart.c:605:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be32 * @@
   drivers/tty/serial/ucc_uart.c:605:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:605:17: sparse:     got restricted __be32 *
   drivers/tty/serial/ucc_uart.c:606:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:606:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:606:17: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:612:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:612:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:612:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:613:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be32 * @@
   drivers/tty/serial/ucc_uart.c:613:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:613:9: sparse:     got restricted __be32 *
   drivers/tty/serial/ucc_uart.c:614:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:614:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:614:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:625:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:625:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:625:17: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:626:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be32 * @@
   drivers/tty/serial/ucc_uart.c:626:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:626:17: sparse:     got restricted __be32 *
   drivers/tty/serial/ucc_uart.c:627:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:627:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:627:17: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:637:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:637:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:637:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:638:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be32 * @@
   drivers/tty/serial/ucc_uart.c:638:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:638:9: sparse:     got restricted __be32 *
   drivers/tty/serial/ucc_uart.c:639:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:639:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:639:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:653:46: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct ucc_uart_pram *uccup @@     got struct ucc_uart_pram [noderef] __iomem *uccup @@
   drivers/tty/serial/ucc_uart.c:653:46: sparse:     expected struct ucc_uart_pram *uccup
   drivers/tty/serial/ucc_uart.c:653:46: sparse:     got struct ucc_uart_pram [noderef] __iomem *uccup
   drivers/tty/serial/ucc_uart.c:661:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got unsigned char * @@
   drivers/tty/serial/ucc_uart.c:661:9: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:661:9: sparse:     got unsigned char *
   drivers/tty/serial/ucc_uart.c:662:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got unsigned char * @@
   drivers/tty/serial/ucc_uart.c:662:9: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:662:9: sparse:     got unsigned char *
   drivers/tty/serial/ucc_uart.c:663:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:663:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:663:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:664:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:664:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:664:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:665:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:665:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:665:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:666:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:666:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:666:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:667:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:667:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:667:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:668:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:668:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:668:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:669:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:669:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:669:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:670:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:670:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:670:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:671:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:671:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:671:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:672:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:672:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:672:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:674:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:674:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:674:17: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:675:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:675:9: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:675:9: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:713:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:713:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:713:17: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:714:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be16 * @@
   drivers/tty/serial/ucc_uart.c:714:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:714:17: sparse:     got restricted __be16 *
   drivers/tty/serial/ucc_uart.c:715:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be32 * @@
   drivers/tty/serial/ucc_uart.c:715:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:715:17: sparse:     got restricted __be32 *
   drivers/tty/serial/ucc_uart.c:716:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be32 * @@
   drivers/tty/serial/ucc_uart.c:716:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:716:17: sparse:     got restricted __be32 *
   drivers/tty/serial/ucc_uart.c:717:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got unsigned char * @@
   drivers/tty/serial/ucc_uart.c:717:17: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:717:17: sparse:     got unsigned char *
   drivers/tty/serial/ucc_uart.c:718:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got unsigned char * @@
   drivers/tty/serial/ucc_uart.c:718:17: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:718:17: sparse:     got unsigned char *
   drivers/tty/serial/ucc_uart.c:719:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got restricted __be32 * @@
   drivers/tty/serial/ucc_uart.c:719:17: sparse:     expected void [noderef] __iomem *addr
   drivers/tty/serial/ucc_uart.c:719:17: sparse:     got restricted __be32 *
   drivers/tty/serial/ucc_uart.c:720:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got unsigned char * @@
   drivers/tty/serial/ucc_uart.c:720:17: sparse:     expected void volatile [noderef] __iomem *addr

vim +264 drivers/tty/serial/ucc_uart.c

d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  248  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  249  /*
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  250   * Return 1 if the QE is done transmitting all buffers for this port
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  251   *
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  252   * This function scans each BD in sequence.  If we find a BD that is not
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  253   * ready (READY=1), then we return 0 indicating that the QE is still sending
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  254   * data.  If we reach the last BD (WRAP=1), then we know we've scanned
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  255   * the entire list, and all BDs are done.
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  256   */
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  257  static unsigned int qe_uart_tx_empty(struct uart_port *port)
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  258  {
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  259  	struct uart_qe_port *qe_port =
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  260  		container_of(port, struct uart_qe_port, port);
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  261  	struct qe_bd *bdp = qe_port->tx_bd_base;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  262  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  263  	while (1) {
8b1cdc4033bd165 drivers/tty/serial/ucc_uart.c Rasmus Villemoes   2019-11-28 @264  		if (qe_ioread16be(&bdp->status) & BD_SC_READY)
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  265  			/* This BD is not done, so return "not done" */
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  266  			return 0;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  267  
8b1cdc4033bd165 drivers/tty/serial/ucc_uart.c Rasmus Villemoes   2019-11-28  268  		if (qe_ioread16be(&bdp->status) & BD_SC_WRAP)
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  269  			/*
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  270  			 * This BD is done and it's the last one, so return
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  271  			 * "done"
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  272  			 */
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  273  			return 1;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  274  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  275  		bdp++;
fc811472c2167cc drivers/tty/serial/ucc_uart.c Joe Perches        2013-10-08  276  	}
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  277  }
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  278  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  279  /*
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  280   * Set the modem control lines
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  281   *
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  282   * Although the QE can control the modem control lines (e.g. CTS), we
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  283   * don't need that support. This function must exist, however, otherwise
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  284   * the kernel will panic.
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  285   */
4be002f1dec8418 drivers/tty/serial/ucc_uart.c Jason Yan          2020-09-12  286  static void qe_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  287  {
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  288  }
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  289  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  290  /*
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  291   * Get the current modem control line status
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  292   *
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  293   * Although the QE can control the modem control lines (e.g. CTS), this
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  294   * driver currently doesn't support that, so we always return Carrier
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  295   * Detect, Data Set Ready, and Clear To Send.
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  296   */
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  297  static unsigned int qe_uart_get_mctrl(struct uart_port *port)
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  298  {
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  299  	return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  300  }
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  301  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  302  /*
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  303   * Disable the transmit interrupt.
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  304   *
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  305   * Although this function is called "stop_tx", it does not actually stop
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  306   * transmission of data.  Instead, it tells the QE to not generate an
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  307   * interrupt when the UCC is finished sending characters.
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  308   */
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  309  static void qe_uart_stop_tx(struct uart_port *port)
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  310  {
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  311  	struct uart_qe_port *qe_port =
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  312  		container_of(port, struct uart_qe_port, port);
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  313  
8b1cdc4033bd165 drivers/tty/serial/ucc_uart.c Rasmus Villemoes   2019-11-28  314  	qe_clrbits_be16(&qe_port->uccp->uccm, UCC_UART_UCCE_TX);
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  315  }
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  316  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  317  /*
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  318   * Transmit as many characters to the HW as possible.
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  319   *
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  320   * This function will attempt to stuff of all the characters from the
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  321   * kernel's transmit buffer into TX BDs.
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  322   *
af901ca181d92aa drivers/serial/ucc_uart.c     André Goddard Rosa 2009-11-14  323   * A return value of non-zero indicates that it successfully stuffed all
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  324   * characters from the kernel buffer.
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  325   *
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  326   * A return value of zero indicates that there are still characters in the
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  327   * kernel's buffer that have not been transmitted, but there are no more BDs
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  328   * available.  This function should be called again after a BD has been made
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  329   * available.
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  330   */
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  331  static int qe_uart_tx_pump(struct uart_qe_port *qe_port)
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  332  {
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  333  	struct qe_bd *bdp;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  334  	unsigned char *p;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  335  	unsigned int count;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  336  	struct uart_port *port = &qe_port->port;
ebd2c8f6d2ec401 drivers/serial/ucc_uart.c     Alan Cox           2009-09-19  337  	struct circ_buf *xmit = &port->state->xmit;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  338  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  339  	/* Handle xon/xoff */
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  340  	if (port->x_char) {
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  341  		/* Pick next descriptor and fill from buffer */
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  342  		bdp = qe_port->tx_cur;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  343  
09a39ec9decd99e drivers/tty/serial/ucc_uart.c Rasmus Villemoes   2019-11-28  344  		p = qe2cpu_addr(be32_to_cpu(bdp->buf), qe_port);
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  345  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  346  		*p++ = port->x_char;
8b1cdc4033bd165 drivers/tty/serial/ucc_uart.c Rasmus Villemoes   2019-11-28 @347  		qe_iowrite16be(1, &bdp->length);
8b1cdc4033bd165 drivers/tty/serial/ucc_uart.c Rasmus Villemoes   2019-11-28  348  		qe_setbits_be16(&bdp->status, BD_SC_READY);
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  349  		/* Get next BD. */
8b1cdc4033bd165 drivers/tty/serial/ucc_uart.c Rasmus Villemoes   2019-11-28  350  		if (qe_ioread16be(&bdp->status) & BD_SC_WRAP)
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  351  			bdp = qe_port->tx_bd_base;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  352  		else
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  353  			bdp++;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  354  		qe_port->tx_cur = bdp;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  355  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  356  		port->icount.tx++;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  357  		port->x_char = 0;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  358  		return 1;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  359  	}
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  360  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  361  	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  362  		qe_uart_stop_tx(port);
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  363  		return 0;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  364  	}
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  365  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  366  	/* Pick next descriptor and fill from buffer */
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  367  	bdp = qe_port->tx_cur;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  368  
8b1cdc4033bd165 drivers/tty/serial/ucc_uart.c Rasmus Villemoes   2019-11-28  369  	while (!(qe_ioread16be(&bdp->status) & BD_SC_READY) &&
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  370  	       (xmit->tail != xmit->head)) {
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  371  		count = 0;
09a39ec9decd99e drivers/tty/serial/ucc_uart.c Rasmus Villemoes   2019-11-28  372  		p = qe2cpu_addr(be32_to_cpu(bdp->buf), qe_port);
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  373  		while (count < qe_port->tx_fifosize) {
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  374  			*p++ = xmit->buf[xmit->tail];
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  375  			xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  376  			port->icount.tx++;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  377  			count++;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  378  			if (xmit->head == xmit->tail)
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  379  				break;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  380  		}
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  381  
8b1cdc4033bd165 drivers/tty/serial/ucc_uart.c Rasmus Villemoes   2019-11-28  382  		qe_iowrite16be(count, &bdp->length);
8b1cdc4033bd165 drivers/tty/serial/ucc_uart.c Rasmus Villemoes   2019-11-28  383  		qe_setbits_be16(&bdp->status, BD_SC_READY);
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  384  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  385  		/* Get next BD. */
8b1cdc4033bd165 drivers/tty/serial/ucc_uart.c Rasmus Villemoes   2019-11-28  386  		if (qe_ioread16be(&bdp->status) & BD_SC_WRAP)
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  387  			bdp = qe_port->tx_bd_base;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  388  		else
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  389  			bdp++;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  390  	}
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  391  	qe_port->tx_cur = bdp;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  392  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  393  	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  394  		uart_write_wakeup(port);
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  395  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  396  	if (uart_circ_empty(xmit)) {
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  397  		/* The kernel buffer is empty, so turn off TX interrupts.  We
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  398  		   don't need to be told when the QE is finished transmitting
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  399  		   the data. */
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  400  		qe_uart_stop_tx(port);
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  401  		return 0;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  402  	}
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  403  
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  404  	return 1;
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  405  }
d7584ed2b994a57 drivers/serial/ucc_uart.c     Timur Tabi         2008-01-15  406  

:::::: The code at line 264 was first introduced by commit
:::::: 8b1cdc4033bd1659c5499c918d4e59bf8253abec serial: ucc_uart: replace ppc-specific IO accessors

:::::: TO: Rasmus Villemoes <linux@...musvillemoes.dk>
:::::: CC: Li Yang <leoyang.li@....com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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