mmccam: Add a generic mmccam_start_discovery function

This is a generic function start a scan request for the given
cam_sim.
Other driver can now just use this function to request a new rescan.

Submitted by:	kibab

2 files changed, 25 insertions, 0 deletions

diff --git a/sys/cam/mmc/mmc_all.h b/sys/cam/mmc/mmc_all.h
index eb7869a05372..dd7cd25453a8 100644
--- a/sys/cam/mmc/mmc_all.h
+++ b/sys/cam/mmc/mmc_all.h
@@ -64,6 +64,7 @@
 #ifndef CAM_MMC_ALL_H
 #define CAM_MMC_ALL_H
 
+#include <cam/cam_sim.h>
 #include <cam/mmc/mmc.h>
 #include <dev/mmc/mmcreg.h>
 
@@ -72,5 +73,6 @@ struct ccb_pathinq;
 struct cam_sim;
 void	mmc_path_inq(struct ccb_pathinq *cpi, const char *hba,
     const struct cam_sim *sim, size_t maxio);
+void    mmccam_start_discovery(struct cam_sim *sim);
 
 #endif
diff --git a/sys/cam/mmc/mmc_xpt.c b/sys/cam/mmc/mmc_xpt.c
index 56b3c2ff5644..6e39cffd13ff 100644
--- a/sys/cam/mmc/mmc_xpt.c
+++ b/sys/cam/mmc/mmc_xpt.c
@@ -404,6 +404,29 @@ mmc_announce_periph(struct cam_periph *periph)
 	printf("XPT info: CLK %04X, ...\n", cts.proto_specific.mmc.ios.clock);
 }
 
+void
+mmccam_start_discovery(struct cam_sim *sim) {
+	union ccb *ccb;
+	uint32_t pathid;
+
+	pathid = cam_sim_path(sim);
+	ccb = xpt_alloc_ccb_nowait();
+	if (ccb == NULL) {
+		return;
+	}
+
+	/*
+	 * We create a rescan request for BUS:0:0, since the card
+	 * will be at lun 0.
+	 */
+	if (xpt_create_path(&ccb->ccb_h.path, NULL, pathid,
+		/* target */ 0, /* lun */ 0) != CAM_REQ_CMP) {
+		xpt_free_ccb(ccb);
+		return;
+	}
+	xpt_rescan(ccb);
+}
+
 /* This func is called per attached device :-( */
 void
 mmc_print_ident(struct mmc_params *ident_data)