static ssize_t irqs_max_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl_afu *afu = to_cxl_afu(device);
return scnprintf(buf, PAGE_SIZE, "%i\n", afu->irqs_max);
}
static void cxl_release_afu(struct device *dev)
{
struct cxl_afu *afu = to_cxl_afu(dev);
pr_devel("cxl_release_afu\n");
kfree(afu);
}
static ssize_t mmio_size_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl_afu *afu = to_cxl_afu(device);
if (afu->pp_size)
return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->pp_size);
return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->adapter->ps_size);
}
static ssize_t mode_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl_afu *afu = to_cxl_afu(device);
if (afu->current_mode == CXL_MODE_DEDICATED)
return scnprintf(buf, PAGE_SIZE, "dedicated_process\n");
if (afu->current_mode == CXL_MODE_DIRECTED)
return scnprintf(buf, PAGE_SIZE, "afu_directed\n");
return scnprintf(buf, PAGE_SIZE, "none\n");
}
static ssize_t modes_supported_show(struct device *device,
struct device_attribute *attr, char *buf)
{
struct cxl_afu *afu = to_cxl_afu(device);
char *p = buf, *end = buf + PAGE_SIZE;
if (afu->modes_supported & CXL_MODE_DEDICATED)
p += scnprintf(p, end - p, "dedicated_process\n");
if (afu->modes_supported & CXL_MODE_DIRECTED)
p += scnprintf(p, end - p, "afu_directed\n");
return (p - buf);
}
static ssize_t prefault_mode_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl_afu *afu = to_cxl_afu(device);
switch (afu->prefault_mode) {
case CXL_PREFAULT_WED:
return scnprintf(buf, PAGE_SIZE, "work_element_descriptor\n");
case CXL_PREFAULT_ALL:
return scnprintf(buf, PAGE_SIZE, "all\n");
default:
return scnprintf(buf, PAGE_SIZE, "none\n");
}
}
static ssize_t mode_store(struct device *device, struct device_attribute *attr,
const char *buf, size_t count)
{
struct cxl_afu *afu = to_cxl_afu(device);
int old_mode, mode = -1;
int rc = -EBUSY;
/* can't change this if we have a user */
spin_lock(&afu->contexts_lock);
if (!idr_is_empty(&afu->contexts_idr))
goto err;
if (!strncmp(buf, "dedicated_process", 17))
mode = CXL_MODE_DEDICATED;
if (!strncmp(buf, "afu_directed", 12))
mode = CXL_MODE_DIRECTED;
if (!strncmp(buf, "none", 4))
mode = 0;
if (mode == -1) {
rc = -EINVAL;
goto err;
}
/*
* cxl_afu_deactivate_mode needs to be done outside the lock, prevent
* other contexts coming in before we are ready:
*/
old_mode = afu->current_mode;
afu->current_mode = 0;
afu->num_procs = 0;
spin_unlock(&afu->contexts_lock);
if ((rc = _cxl_afu_deactivate_mode(afu, old_mode)))
return rc;
if ((rc = cxl_afu_activate_mode(afu, mode)))
return rc;
return count;
err:
spin_unlock(&afu->contexts_lock);
return rc;
}
static ssize_t prefault_mode_store(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct cxl_afu *afu = to_cxl_afu(device);
enum prefault_modes mode = -1;
if (!strncmp(buf, "work_element_descriptor", 23))
mode = CXL_PREFAULT_WED;
if (!strncmp(buf, "all", 3))
mode = CXL_PREFAULT_ALL;
if (!strncmp(buf, "none", 4))
mode = CXL_PREFAULT_NONE;
if (mode == -1)
return -EINVAL;
afu->prefault_mode = mode;
return count;
}
static ssize_t irqs_max_store(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct cxl_afu *afu = to_cxl_afu(device);
ssize_t ret;
int irqs_max;
ret = sscanf(buf, "%i", &irqs_max);
if (ret != 1)
return -EINVAL;
if (irqs_max < afu->pp_irqs)
return -EINVAL;
if (irqs_max > afu->adapter->user_irqs)
return -EINVAL;
afu->irqs_max = irqs_max;
return count;
}
static ssize_t reset_store_afu(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct cxl_afu *afu = to_cxl_afu(device);
int rc;
/* Not safe to reset if it is currently in use */
spin_lock(&afu->contexts_lock);
if (!idr_is_empty(&afu->contexts_idr)) {
rc = -EBUSY;
goto err;
}
if ((rc = cxl_afu_reset(afu)))
goto err;
rc = count;
err:
spin_unlock(&afu->contexts_lock);
return rc;
}
