From: "J. German Rivera" <german.riv...@freescale.com> THE MSI domain associated with a root DPRC object is obtained form the device tree. Child DPRCs inherit the parent DPRC MSI domain.
Signed-off-by: J. German Rivera <german.riv...@freescale.com> --- CHANGE HISTORY Changes in v4: - Addressed comments from Marc Zyngier: * Changed call to fsl_mc_find_msi_domain() to match new signature changed in patch 3. Changes in v3: none Changes in v2: none drivers/staging/fsl-mc/bus/dprc-driver.c | 39 ++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/drivers/staging/fsl-mc/bus/dprc-driver.c b/drivers/staging/fsl-mc/bus/dprc-driver.c index ef1bb93..38fc404 100644 --- a/drivers/staging/fsl-mc/bus/dprc-driver.c +++ b/drivers/staging/fsl-mc/bus/dprc-driver.c @@ -13,6 +13,7 @@ #include "../include/mc-sys.h" #include <linux/module.h> #include <linux/slab.h> +#include <linux/interrupt.h> #include "dprc-cmd.h" struct dprc_child_objs { @@ -398,11 +399,16 @@ static int dprc_probe(struct fsl_mc_device *mc_dev) { int error; size_t region_size; + struct device *parent_dev = mc_dev->dev.parent; struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev); + bool msi_domain_set = false; if (WARN_ON(strcmp(mc_dev->obj_desc.type, "dprc") != 0)) return -EINVAL; + if (WARN_ON(dev_get_msi_domain(&mc_dev->dev))) + return -EINVAL; + if (!mc_dev->mc_io) { /* * This is a child DPRC: @@ -421,6 +427,30 @@ static int dprc_probe(struct fsl_mc_device *mc_dev) &mc_dev->mc_io); if (error < 0) return error; + /* + * Inherit parent MSI domain: + */ + dev_set_msi_domain(&mc_dev->dev, + dev_get_msi_domain(parent_dev)); + msi_domain_set = true; + } else { + /* + * This is a root DPRC + */ + struct irq_domain *mc_msi_domain; + + if (WARN_ON(parent_dev->bus == &fsl_mc_bus_type)) + return -EINVAL; + + error = fsl_mc_find_msi_domain(parent_dev, + &mc_msi_domain); + if (error < 0) { + dev_warn(&mc_dev->dev, + "WARNING: MC bus without interrupt support\n"); + } else { + dev_set_msi_domain(&mc_dev->dev, mc_msi_domain); + msi_domain_set = true; + } } error = dprc_open(mc_dev->mc_io, 0, mc_dev->obj_desc.id, @@ -446,6 +476,9 @@ error_cleanup_open: (void)dprc_close(mc_dev->mc_io, 0, mc_dev->mc_handle); error_cleanup_mc_io: + if (msi_domain_set) + dev_set_msi_domain(&mc_dev->dev, NULL); + fsl_destroy_mc_io(mc_dev->mc_io); return error; } @@ -463,6 +496,7 @@ error_cleanup_mc_io: static int dprc_remove(struct fsl_mc_device *mc_dev) { int error; + struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev); if (WARN_ON(strcmp(mc_dev->obj_desc.type, "dprc") != 0)) return -EINVAL; @@ -475,6 +509,11 @@ static int dprc_remove(struct fsl_mc_device *mc_dev) if (error < 0) dev_err(&mc_dev->dev, "dprc_close() failed: %d\n", error); + if (dev_get_msi_domain(&mc_dev->dev)) { + fsl_mc_cleanup_irq_pool(mc_bus); + dev_set_msi_domain(&mc_dev->dev, NULL); + } + dev_info(&mc_dev->dev, "DPRC device unbound from driver"); return 0; } -- 2.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/