diff options
Diffstat (limited to 'arch/powerpc/sysdev/qe_lib/qe.c')
-rw-r--r-- | arch/powerpc/sysdev/qe_lib/qe.c | 75 |
1 files changed, 71 insertions, 4 deletions
diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c index 01bce3784b0a..b28b0e512d67 100644 --- a/arch/powerpc/sysdev/qe_lib/qe.c +++ b/arch/powerpc/sysdev/qe_lib/qe.c @@ -61,6 +61,7 @@ struct qe_immap __iomem *qe_immr; EXPORT_SYMBOL(qe_immr); static struct qe_snum snums[QE_NUM_OF_SNUM]; /* Dynamically allocated SNUMs */ +static unsigned int qe_num_of_snum; static phys_addr_t qebase = -1; @@ -264,10 +265,14 @@ static void qe_snums_init(void) 0x04, 0x05, 0x0C, 0x0D, 0x14, 0x15, 0x1C, 0x1D, 0x24, 0x25, 0x2C, 0x2D, 0x34, 0x35, 0x88, 0x89, 0x98, 0x99, 0xA8, 0xA9, 0xB8, 0xB9, 0xC8, 0xC9, - 0xD8, 0xD9, 0xE8, 0xE9, + 0xD8, 0xD9, 0xE8, 0xE9, 0x08, 0x09, 0x18, 0x19, + 0x28, 0x29, 0x38, 0x39, 0x48, 0x49, 0x58, 0x59, + 0x68, 0x69, 0x78, 0x79, 0x80, 0x81, }; - for (i = 0; i < QE_NUM_OF_SNUM; i++) { + qe_num_of_snum = qe_get_num_of_snums(); + + for (i = 0; i < qe_num_of_snum; i++) { snums[i].num = snum_init[i]; snums[i].state = QE_SNUM_STATE_FREE; } @@ -280,7 +285,7 @@ int qe_get_snum(void) int i; spin_lock_irqsave(&qe_lock, flags); - for (i = 0; i < QE_NUM_OF_SNUM; i++) { + for (i = 0; i < qe_num_of_snum; i++) { if (snums[i].state == QE_SNUM_STATE_FREE) { snums[i].state = QE_SNUM_STATE_USED; snum = snums[i].num; @@ -297,7 +302,7 @@ void qe_put_snum(u8 snum) { int i; - for (i = 0; i < QE_NUM_OF_SNUM; i++) { + for (i = 0; i < qe_num_of_snum; i++) { if (snums[i].num == snum) { snums[i].state = QE_SNUM_STATE_FREE; break; @@ -575,3 +580,65 @@ struct qe_firmware_info *qe_get_firmware_info(void) } EXPORT_SYMBOL(qe_get_firmware_info); +unsigned int qe_get_num_of_risc(void) +{ + struct device_node *qe; + int size; + unsigned int num_of_risc = 0; + const u32 *prop; + + qe = of_find_compatible_node(NULL, NULL, "fsl,qe"); + if (!qe) { + /* Older devices trees did not have an "fsl,qe" + * compatible property, so we need to look for + * the QE node by name. + */ + qe = of_find_node_by_type(NULL, "qe"); + if (!qe) + return num_of_risc; + } + + prop = of_get_property(qe, "fsl,qe-num-riscs", &size); + if (prop && size == sizeof(*prop)) + num_of_risc = *prop; + + of_node_put(qe); + + return num_of_risc; +} +EXPORT_SYMBOL(qe_get_num_of_risc); + +unsigned int qe_get_num_of_snums(void) +{ + struct device_node *qe; + int size; + unsigned int num_of_snums; + const u32 *prop; + + num_of_snums = 28; /* The default number of snum for threads is 28 */ + qe = of_find_compatible_node(NULL, NULL, "fsl,qe"); + if (!qe) { + /* Older devices trees did not have an "fsl,qe" + * compatible property, so we need to look for + * the QE node by name. + */ + qe = of_find_node_by_type(NULL, "qe"); + if (!qe) + return num_of_snums; + } + + prop = of_get_property(qe, "fsl,qe-num-snums", &size); + if (prop && size == sizeof(*prop)) { + num_of_snums = *prop; + if ((num_of_snums < 28) || (num_of_snums > QE_NUM_OF_SNUM)) { + /* No QE ever has fewer than 28 SNUMs */ + pr_err("QE: number of snum is invalid\n"); + return -EINVAL; + } + } + + of_node_put(qe); + + return num_of_snums; +} +EXPORT_SYMBOL(qe_get_num_of_snums); |