[Xen-devel,10/25,v6] xen/arm: vpl011: Modify xenconsole functions to take console structure as input

Message ID 1500296815-10243-11-git-send-email-bhupinder.thakur@linaro.org
State Superseded
Headers show
Series
  • SBSA UART emulation support in Xen
Related show

Commit Message

Bhupinder Thakur July 17, 2017, 1:06 p.m.
Xenconsole functions take domain structure as input. These functions shall be
modified to take console structure as input since these functions typically perform
console specific operations.

Also the console specific functions starting with prefix "domain_" shall be modified
to "console_" to indicate that these are console specific functions.

This patch is in preparation to support multiple consoles to support vuart console.

Signed-off-by: Bhupinder Thakur <bhupinder.thakur@linaro.org>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Wei Liu <wei.liu2@citrix.com>
---
CC: Ian Jackson <ian.jackson@eu.citrix.com>
CC: Wei Liu <wei.liu2@citrix.com>
CC: Stefano Stabellini <sstabellini@kernel.org>
CC: Julien Grall <julien.grall@arm.com>

Changes since v3:
- The changes in xenconsole have been split into four patches. This is the second patch.

 tools/console/daemon/io.c | 79 +++++++++++++++++++++++------------------------
 1 file changed, 38 insertions(+), 41 deletions(-)

Patch

diff --git a/tools/console/daemon/io.c b/tools/console/daemon/io.c
index 6f5c69c..a2a3496 100644
--- a/tools/console/daemon/io.c
+++ b/tools/console/daemon/io.c
@@ -163,10 +163,10 @@  static int write_with_timestamp(int fd, const char *data, size_t sz,
 	return 0;
 }
 
-static void buffer_append(struct domain *dom)
+static void buffer_append(struct console *con)
 {
-	struct console *con = &dom->console;
 	struct buffer *buffer = &con->buffer;
+	struct domain *dom = con->d;
 	XENCONS_RING_IDX cons, prod, size;
 	struct xencons_interface *intf = con->interface;
 
@@ -296,12 +296,13 @@  static int create_hv_log(void)
 	return fd;
 }
 
-static int create_domain_log(struct domain *dom)
+static int create_console_log(struct console *con)
 {
 	char logfile[PATH_MAX];
 	char *namepath, *data, *s;
 	int fd;
 	unsigned int len;
+	struct domain *dom = con->d;
 
 	namepath = xs_get_domain_path(xs, dom->domid);
 	s = realloc(namepath, strlen(namepath) + 6);
@@ -342,10 +343,8 @@  static int create_domain_log(struct domain *dom)
 	return fd;
 }
 
-static void domain_close_tty(struct domain *dom)
+static void console_close_tty(struct console *con)
 {
-	struct console *con = &dom->console;
-
 	if (con->master_fd != -1) {
 		close(con->master_fd);
 		con->master_fd = -1;
@@ -417,7 +416,7 @@  void cfmakeraw(struct termios *termios_p)
 }
 #endif /* __sun__ */
 
-static int domain_create_tty(struct domain *dom)
+static int console_create_tty(struct console *con)
 {
 	const char *slave;
 	char *path;
@@ -426,7 +425,7 @@  static int domain_create_tty(struct domain *dom)
 	char *data;
 	unsigned int len;
 	struct termios term;
-	struct console *con = &dom->console;
+	struct domain *dom = con->d;
 
 	assert(con->slave_fd == -1);
 	assert(con->master_fd == -1);
@@ -487,7 +486,7 @@  static int domain_create_tty(struct domain *dom)
 
 	return 1;
 out:
-	domain_close_tty(dom);
+	console_close_tty(con);
 	return 0;
 }
  
@@ -526,10 +525,8 @@  static int xs_gather(struct xs_handle *xs, const char *dir, ...)
 	return ret;
 }
 
-static void domain_unmap_interface(struct domain *dom)
+static void console_unmap_interface(struct console *con)
 {
-	struct console *con = &dom->console;
-
 	if (con->interface == NULL)
 		return;
 	if (xgt_handle && con->ring_ref == -1)
@@ -540,11 +537,11 @@  static void domain_unmap_interface(struct domain *dom)
 	con->ring_ref = -1;
 }
  
-static int domain_create_ring(struct domain *dom)
+static int console_create_ring(struct console *con)
 {
 	int err, remote_port, ring_ref, rc;
 	char *type, path[PATH_MAX];
-	struct console *con = &dom->console;
+	struct domain *dom = con->d;
 
 	err = xs_gather(xs, con->xspath,
 			"ring-ref", "%u", &ring_ref,
@@ -563,7 +560,7 @@  static int domain_create_ring(struct domain *dom)
 
 	/* If using ring_ref and it has changed, remap */
 	if (ring_ref != con->ring_ref && con->ring_ref != -1)
-		domain_unmap_interface(dom);
+		console_unmap_interface(con);
 
 	if (!con->interface && xgt_handle) {
 		/* Prefer using grant table */
@@ -621,7 +618,7 @@  static int domain_create_ring(struct domain *dom)
 	con->remote_port = remote_port;
 
 	if (con->master_fd == -1) {
-		if (!domain_create_tty(dom)) {
+		if (!console_create_tty(con)) {
 			err = errno;
 			xenevtchn_close(con->xce_handle);
 			con->xce_handle = NULL;
@@ -632,7 +629,7 @@  static int domain_create_ring(struct domain *dom)
 	}
 
 	if (log_guest && (con->log_fd == -1))
-		con->log_fd = create_domain_log(dom);
+		con->log_fd = create_console_log(con);
 
  out:
 	return err;
@@ -648,7 +645,7 @@  static bool watch_domain(struct domain *dom, bool watch)
 	if (watch) {
 		success = xs_watch(xs, con->xspath, domid_str);
 		if (success)
-			domain_create_ring(dom);
+			console_create_ring(con);
 		else
 			xs_unwatch(xs, con->xspath, domid_str);
 	} else {
@@ -695,6 +692,7 @@  static struct domain *create_domain(int domid)
 	con->slave_fd = -1;
 	con->log_fd = -1;
 	con->xce_pollfd_idx = -1;
+	con->d = dom;
 
 	con->next_period = ((long long)ts.tv_sec * 1000) + (ts.tv_nsec / 1000000) + RATE_LIMIT_PERIOD;
 
@@ -746,7 +744,7 @@  static void cleanup_domain(struct domain *d)
 {
 	struct console *con = &d->console;
 
-	domain_close_tty(d);
+	console_close_tty(con);
 
 	if (con->log_fd != -1) {
 		close(con->log_fd);
@@ -768,7 +766,7 @@  static void shutdown_domain(struct domain *d)
 
 	d->is_dead = true;
 	watch_domain(d, false);
-	domain_unmap_interface(d);
+	console_unmap_interface(con);
 	if (con->xce_handle != NULL)
 		xenevtchn_close(con->xce_handle);
 	con->xce_handle = NULL;
@@ -799,9 +797,8 @@  static void enum_domains(void)
 	}
 }
 
-static int ring_free_bytes(struct domain *dom)
+static int ring_free_bytes(struct console *con)
 {
-	struct console *con = &dom->console;
 	struct xencons_interface *intf = con->interface;
 	XENCONS_RING_IDX cons, prod, space;
 
@@ -816,30 +813,30 @@  static int ring_free_bytes(struct domain *dom)
 	return (sizeof(intf->in) - space);
 }
 
-static void domain_handle_broken_tty(struct domain *dom, int recreate)
+static void console_handle_broken_tty(struct console *con, int recreate)
 {
-	domain_close_tty(dom);
+	console_close_tty(con);
 
 	if (recreate) {
-		domain_create_tty(dom);
+		console_create_tty(con);
 	} else {
-		shutdown_domain(dom);
+		shutdown_domain(con->d);
 	}
 }
 
-static void handle_tty_read(struct domain *dom)
+static void handle_tty_read(struct console *con)
 {
 	ssize_t len = 0;
 	char msg[80];
 	int i;
-	struct console *con = &dom->console;
 	struct xencons_interface *intf = con->interface;
+	struct domain *dom = con->d;
 	XENCONS_RING_IDX prod;
 
 	if (dom->is_dead)
 		return;
 
-	len = ring_free_bytes(dom);
+	len = ring_free_bytes(con);
 	if (len == 0)
 		return;
 
@@ -853,7 +850,7 @@  static void handle_tty_read(struct domain *dom)
 	 * keep the slave open for the duration.
 	 */
 	if (len < 0) {
-		domain_handle_broken_tty(dom, domain_is_valid(dom->domid));
+		console_handle_broken_tty(con, domain_is_valid(dom->domid));
 	} else if (domain_is_valid(dom->domid)) {
 		prod = intf->in_prod;
 		for (i = 0; i < len; i++) {
@@ -864,15 +861,15 @@  static void handle_tty_read(struct domain *dom)
 		intf->in_prod = prod;
 		xenevtchn_notify(con->xce_handle, con->local_port);
 	} else {
-		domain_close_tty(dom);
+		console_close_tty(con);
 		shutdown_domain(dom);
 	}
 }
 
-static void handle_tty_write(struct domain *dom)
+static void handle_tty_write(struct console *con)
 {
 	ssize_t len;
-	struct console *con = &dom->console;
+	struct domain *dom = con->d;
 
 	if (dom->is_dead)
 		return;
@@ -882,7 +879,7 @@  static void handle_tty_write(struct domain *dom)
  	if (len < 1) {
 		dolog(LOG_DEBUG, "Write failed on domain %d: %zd, %d\n",
 		      dom->domid, len, errno);
-		domain_handle_broken_tty(dom, domain_is_valid(dom->domid));
+		console_handle_broken_tty(con, domain_is_valid(dom->domid));
 	} else {
 		buffer_advance(&con->buffer, len);
 	}
@@ -901,7 +898,7 @@  static void handle_ring_read(struct domain *dom)
 
 	con->event_count++;
 
-	buffer_append(dom);
+	buffer_append(con);
 
 	if (con->event_count < RATE_LIMIT_ALLOWANCE)
 		(void)xenevtchn_unmask(con->xce_handle, port);
@@ -925,7 +922,7 @@  static void handle_xs(void)
 		/* We may get watches firing for domains that have recently
 		   been removed, so dom may be NULL here. */
 		if (dom && dom->is_dead == false)
-			domain_create_ring(dom);
+			console_create_ring(&dom->console);
 	}
 
 	free(vec);
@@ -975,7 +972,7 @@  static void handle_log_reload(void)
 
 			if (con->log_fd != -1)
 				close(con->log_fd);
-			con->log_fd = create_domain_log(d);
+			con->log_fd = create_console_log(con);
 		}
 	}
 
@@ -1121,7 +1118,7 @@  void handle_io(void)
 
 			if (con->master_fd != -1) {
 				short events = 0;
-				if (!d->is_dead && ring_free_bytes(d))
+				if (!d->is_dead && ring_free_bytes(con))
 					events |= POLLIN;
 
 				if (!buffer_empty(&con->buffer))
@@ -1208,15 +1205,15 @@  void handle_io(void)
 			if (con->master_fd != -1 && con->master_pollfd_idx != -1) {
 				if (fds[con->master_pollfd_idx].revents &
 				    ~(POLLIN|POLLOUT|POLLPRI))
-					domain_handle_broken_tty(d,
+					console_handle_broken_tty(con,
 						   domain_is_valid(d->domid));
 				else {
 					if (fds[con->master_pollfd_idx].revents &
 					    POLLIN)
-						handle_tty_read(d);
+						handle_tty_read(con);
 					if (fds[con->master_pollfd_idx].revents &
 					    POLLOUT)
-						handle_tty_write(d);
+						handle_tty_write(con);
 				}
 			}