Module Name: src Committed By: marty Date: Sun Jan 10 23:01:29 UTC 2016
Modified Files: src/sys/dev/fdt: fdt_intr.c Log Message: FDT Interrupt handling - change memory allocation This version does dynamic allocation of the specifier array. To generate a diff of this commit: cvs rdiff -u -r1.6 -r1.7 src/sys/dev/fdt/fdt_intr.c Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.
Modified files: Index: src/sys/dev/fdt/fdt_intr.c diff -u src/sys/dev/fdt/fdt_intr.c:1.6 src/sys/dev/fdt/fdt_intr.c:1.7 --- src/sys/dev/fdt/fdt_intr.c:1.6 Thu Jan 7 04:26:44 2016 +++ src/sys/dev/fdt/fdt_intr.c Sun Jan 10 23:01:29 2016 @@ -1,4 +1,4 @@ -/* $NetBSD: fdt_intr.c,v 1.6 2016/01/07 04:26:44 marty Exp $ */ +/* $NetBSD: fdt_intr.c,v 1.7 2016/01/10 23:01:29 marty Exp $ */ /*- * Copyright (c) 2015 Jared D. McNeill <jmcne...@invisible.ca> @@ -27,7 +27,7 @@ */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: fdt_intr.c,v 1.6 2016/01/07 04:26:44 marty Exp $"); +__KERNEL_RCSID(0, "$NetBSD: fdt_intr.c,v 1.7 2016/01/10 23:01:29 marty Exp $"); #include <sys/param.h> #include <sys/bus.h> @@ -36,7 +36,6 @@ __KERNEL_RCSID(0, "$NetBSD: fdt_intr.c,v #include <libfdt.h> #include <dev/fdt/fdtvar.h> -#define MAX_SPEC_LENGTH 6 struct fdtbus_interrupt_controller { device_t ic_dev; int ic_phandle; @@ -123,33 +122,41 @@ void * fdtbus_intr_establish(int phandle, u_int index, int ipl, int flags, int (*func)(void *), void *arg) { + void * result = NULL; u_int *specifier; - u_int maxspec[MAX_SPEC_LENGTH]; + u_int spec_length; int ihandle; struct fdtbus_interrupt_controller *ic; if (has_interrupt_map(phandle)) { - specifier = get_entry_from_map(phandle, index, maxspec); + specifier = get_entry_from_map(phandle, index, &spec_length); ihandle = be32toh(specifier[1]); ihandle = fdtbus_get_phandle_from_native(ihandle); specifier += 2; } else { - specifier = get_specifier_by_index(phandle, index, maxspec); + specifier = get_specifier_by_index(phandle, index, + &spec_length); ihandle = phandle; } if (specifier == NULL) { printf("%s: Unable to get specifier %d for phandle %d\n", __func__, index, phandle); - return NULL; + goto done; } ic = fdtbus_get_interrupt_controller(ihandle); if (ic == NULL) { printf("%s: Unable to get interrupt controller for %d\n", __func__, ihandle); - return NULL; + goto done; } - return ic->ic_funcs->establish(ic->ic_dev, specifier, + result = ic->ic_funcs->establish(ic->ic_dev, specifier, ipl, flags, func, arg); +done: + if (has_interrupt_map(phandle)) + specifier -= 2; + if (specifier && spec_length > 0) + kmem_free(specifier, spec_length); + return result; } void @@ -166,31 +173,40 @@ fdtbus_intr_disestablish(int phandle, vo bool fdtbus_intr_str(int phandle, u_int index, char *buf, size_t buflen) { + bool result = false; struct fdtbus_interrupt_controller *ic; int ihandle; u_int *specifier; - u_int maxspec[MAX_SPEC_LENGTH]; + u_int spec_length; if (has_interrupt_map(phandle)) { - specifier = get_entry_from_map(phandle, index, maxspec); + specifier = get_entry_from_map(phandle, index, + &spec_length); ihandle = be32toh(specifier[1]); ihandle = fdtbus_get_phandle_from_native(ihandle); specifier += 2; } else { ihandle = phandle; - specifier = get_specifier_by_index(phandle, index, maxspec); + specifier = get_specifier_by_index(phandle, index, + &spec_length); } if (specifier == NULL) { printf("%s: Unable to get specifier %d for phandle %d\n", __func__, index, phandle); - return false; + goto done; } ic = fdtbus_get_interrupt_controller(ihandle); if (ic == NULL) { printf("%s: Unable to get interrupt controller for %d\n", __func__, ihandle); - return false; + goto done; } - return ic->ic_funcs->intrstr(ic->ic_dev, specifier, buf, buflen); + result = ic->ic_funcs->intrstr(ic->ic_dev, specifier, buf, buflen); +done: + if (has_interrupt_map(phandle)) + specifier -= 2; + if (specifier && spec_length > 0) + kmem_free(specifier, spec_length); + return result; } /* @@ -232,7 +248,7 @@ has_interrupt_map(int phandle) * */ static u_int * -get_entry_from_map(int phandle, int pindex, u_int *specifier) +get_entry_from_map(int phandle, int pindex, u_int *spec_length) { int intr_cells; int intr_parent; @@ -262,9 +278,11 @@ get_entry_from_map(int phandle, int pind u_int pintr_cells; of_getprop_uint32(parent, "#interrupt-cells", &pintr_cells); if (index == pindex) { - for (int i = 0; i < pintr_cells; i++) - specifier[i] = p[i]; - result = specifier; + result = kmem_alloc((pintr_cells + 2) * sizeof(u_int), + KM_SLEEP); + *spec_length = (pintr_cells + 2) * sizeof (u_int); + for (int i = 0; i < pintr_cells + 2; i++) + result[i] = p[i]; goto done; } @@ -287,9 +305,11 @@ done: * and return a pointer to it. * */ -static u_int *get_specifier_by_index(int phandle, int pindex, u_int *specifier) +static u_int *get_specifier_by_index(int phandle, int pindex, + u_int *spec_length) { u_int *specifiers; + u_int *specifier; int interrupt_parent, interrupt_cells, len; interrupt_parent = fdtbus_get_interrupt_parent(phandle); @@ -326,6 +346,8 @@ static u_int *get_specifier_by_index(int kmem_free(specifiers, len); return NULL; } + specifier = kmem_alloc(interrupt_cells * sizeof(u_int), KM_SLEEP); + *spec_length = interrupt_cells * sizeof(u_int); for (int i = 0; i < interrupt_cells; i++) specifier[i] = specifiers[pindex * clen + i]; kmem_free(specifiers, len);