diff options
| -rw-r--r-- | drivers/infiniband/hw/hfi1/affinity.c | 68 | ||||
| -rw-r--r-- | drivers/infiniband/hw/hfi1/affinity.h | 4 | ||||
| -rw-r--r-- | drivers/infiniband/hw/hfi1/sysfs.c | 25 |
3 files changed, 97 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/affinity.c b/drivers/infiniband/hw/hfi1/affinity.c index c9dcbd55883a..79575ee873f2 100644 --- a/drivers/infiniband/hw/hfi1/affinity.c +++ b/drivers/infiniband/hw/hfi1/affinity.c @@ -47,6 +47,7 @@ #include <linux/topology.h> #include <linux/cpumask.h> #include <linux/module.h> +#include <linux/cpumask.h> #include "hfi.h" #include "affinity.h" @@ -673,3 +674,70 @@ void hfi1_put_proc_affinity(int cpu) } spin_unlock(&affinity->lock); } + +/* Prevents concurrent reads and writes of the sdma_affinity attrib */ +static DEFINE_MUTEX(sdma_affinity_mutex); + +int hfi1_set_sdma_affinity(struct hfi1_devdata *dd, const char *buf, + size_t count) +{ + struct hfi1_affinity_node *entry; + struct cpumask mask; + int ret, i; + + spin_lock(&node_affinity.lock); + entry = node_affinity_lookup(dd->node); + spin_unlock(&node_affinity.lock); + + if (!entry) + return -EINVAL; + + ret = cpulist_parse(buf, &mask); + if (ret) + return ret; + + if (!cpumask_subset(&mask, cpu_online_mask) || cpumask_empty(&mask)) { + dd_dev_warn(dd, "Invalid CPU mask\n"); + return -EINVAL; + } + + mutex_lock(&sdma_affinity_mutex); + /* reset the SDMA interrupt affinity details */ + init_cpu_mask_set(&entry->def_intr); + cpumask_copy(&entry->def_intr.mask, &mask); + /* + * Reassign the affinity for each SDMA interrupt. + */ + for (i = 0; i < dd->num_msix_entries; i++) { + struct hfi1_msix_entry *msix; + + msix = &dd->msix_entries[i]; + if (msix->type != IRQ_SDMA) + continue; + + ret = hfi1_get_irq_affinity(dd, msix); + + if (ret) + break; + } + + mutex_unlock(&sdma_affinity_mutex); + return ret ? ret : strnlen(buf, PAGE_SIZE); +} + +int hfi1_get_sdma_affinity(struct hfi1_devdata *dd, char *buf) +{ + struct hfi1_affinity_node *entry; + + spin_lock(&node_affinity.lock); + entry = node_affinity_lookup(dd->node); + spin_unlock(&node_affinity.lock); + + if (!entry) + return -EINVAL; + + mutex_lock(&sdma_affinity_mutex); + cpumap_print_to_pagebuf(true, buf, &entry->def_intr.mask); + mutex_unlock(&sdma_affinity_mutex); + return strnlen(buf, PAGE_SIZE); +} diff --git a/drivers/infiniband/hw/hfi1/affinity.h b/drivers/infiniband/hw/hfi1/affinity.h index f784de52e881..8879cf7a8cac 100644 --- a/drivers/infiniband/hw/hfi1/affinity.h +++ b/drivers/infiniband/hw/hfi1/affinity.h @@ -102,6 +102,10 @@ int hfi1_get_proc_affinity(int); /* Release a CPU used by a user process. */ void hfi1_put_proc_affinity(int); +int hfi1_get_sdma_affinity(struct hfi1_devdata *dd, char *buf); +int hfi1_set_sdma_affinity(struct hfi1_devdata *dd, const char *buf, + size_t count); + struct hfi1_affinity_node { int node; struct cpu_mask_set def_intr; diff --git a/drivers/infiniband/hw/hfi1/sysfs.c b/drivers/infiniband/hw/hfi1/sysfs.c index 91fc2aed6aed..74c84c655f7e 100644 --- a/drivers/infiniband/hw/hfi1/sysfs.c +++ b/drivers/infiniband/hw/hfi1/sysfs.c @@ -49,6 +49,7 @@ #include "hfi.h" #include "mad.h" #include "trace.h" +#include "affinity.h" /* * Start of per-port congestion control structures and support code @@ -622,6 +623,27 @@ static ssize_t show_tempsense(struct device *device, return ret; } +static ssize_t show_sdma_affinity(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct hfi1_ibdev *dev = + container_of(device, struct hfi1_ibdev, rdi.ibdev.dev); + struct hfi1_devdata *dd = dd_from_dev(dev); + + return hfi1_get_sdma_affinity(dd, buf); +} + +static ssize_t store_sdma_affinity(struct device *device, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct hfi1_ibdev *dev = + container_of(device, struct hfi1_ibdev, rdi.ibdev.dev); + struct hfi1_devdata *dd = dd_from_dev(dev); + + return hfi1_set_sdma_affinity(dd, buf, count); +} + /* * end of per-unit (or driver, in some cases, but replicated * per unit) functions @@ -636,6 +658,8 @@ static DEVICE_ATTR(serial, S_IRUGO, show_serial, NULL); static DEVICE_ATTR(boardversion, S_IRUGO, show_boardversion, NULL); static DEVICE_ATTR(tempsense, S_IRUGO, show_tempsense, NULL); static DEVICE_ATTR(chip_reset, S_IWUSR, NULL, store_chip_reset); +static DEVICE_ATTR(sdma_affinity, S_IWUSR | S_IRUGO, show_sdma_affinity, + store_sdma_affinity); static struct device_attribute *hfi1_attributes[] = { &dev_attr_hw_rev, @@ -646,6 +670,7 @@ static struct device_attribute *hfi1_attributes[] = { &dev_attr_boardversion, &dev_attr_tempsense, &dev_attr_chip_reset, + &dev_attr_sdma_affinity, }; int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num, |