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cxl: Introduce implementation-specific API

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The backend API (in cxl.h) lists some low-level functions whose
implementation is different on bare-metal and in a guest. Each
environment implements its own functions, and the common code uses
them through function pointers, defined in cxl_backend_ops

Co-authored-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Manoj Kumar <manoj@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Frederic Barrat
2016-03-04 12:26:28 +01:00
committed by Michael Ellerman
parent cca44c0192
commit 5be587b111
11 changed files with 185 additions and 120 deletions
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32
drivers/misc/cxl/sysfs.c
View File

@@ -69,7 +69,7 @@ static ssize_t reset_adapter_store(struct device *device,
if ((rc != 1) || (val != 1))
return -EINVAL;
if ((rc = cxl_reset(adapter)))
if ((rc = cxl_ops->adapter_reset(adapter)))
return rc;
return count;
}
@@ -211,7 +211,7 @@ static ssize_t reset_store_afu(struct device *device,
goto err;
}
if ((rc = __cxl_afu_reset(afu)))
if ((rc = cxl_ops->afu_reset(afu)))
goto err;
rc = count;
@@ -348,7 +348,7 @@ static ssize_t mode_store(struct device *device, struct device_attribute *attr,
}
/*
* cxl_afu_deactivate_mode needs to be done outside the lock, prevent
* afu_deactivate_mode needs to be done outside the lock, prevent
* other contexts coming in before we are ready:
*/
old_mode = afu->current_mode;
@@ -357,9 +357,9 @@ static ssize_t mode_store(struct device *device, struct device_attribute *attr,
mutex_unlock(&afu->contexts_lock);
if ((rc = _cxl_afu_deactivate_mode(afu, old_mode)))
if ((rc = cxl_ops->afu_deactivate_mode(afu, old_mode)))
return rc;
if ((rc = cxl_afu_activate_mode(afu, mode)))
if ((rc = cxl_ops->afu_activate_mode(afu, mode)))
return rc;
return count;
@@ -389,7 +389,7 @@ static ssize_t afu_eb_read(struct file *filp, struct kobject *kobj,
struct cxl_afu *afu = to_cxl_afu(container_of(kobj,
struct device, kobj));
return cxl_afu_read_err_buffer(afu, buf, off, count);
return cxl_ops->afu_read_err_buffer(afu, buf, off, count);
}
static struct device_attribute afu_attrs[] = {
@@ -469,10 +469,12 @@ static ssize_t afu_read_config(struct file *filp, struct kobject *kobj,
struct afu_config_record *cr = to_cr(kobj);
struct cxl_afu *afu = to_cxl_afu(container_of(kobj->parent, struct device, kobj));
u64 i, j, val;
u64 i, j, val, rc;
for (i = 0; i < count;) {
val = cxl_afu_cr_read64(afu, cr->cr, off & ~0x7);
rc = cxl_ops->afu_cr_read64(afu, cr->cr, off & ~0x7, &val);
if (rc)
val = ~0ULL;
for (j = off & 0x7; j < 8 && i < count; i++, j++, off++)
buf[i] = (val >> (j * 8)) & 0xff;
}
@@ -517,9 +519,17 @@ static struct afu_config_record *cxl_sysfs_afu_new_cr(struct cxl_afu *afu, int c
return ERR_PTR(-ENOMEM);
cr->cr = cr_idx;
cr->device = cxl_afu_cr_read16(afu, cr_idx, PCI_DEVICE_ID);
cr->vendor = cxl_afu_cr_read16(afu, cr_idx, PCI_VENDOR_ID);
cr->class = cxl_afu_cr_read32(afu, cr_idx, PCI_CLASS_REVISION) >> 8;
rc = cxl_ops->afu_cr_read16(afu, cr_idx, PCI_DEVICE_ID, &cr->device);
if (rc)
goto err;
rc = cxl_ops->afu_cr_read16(afu, cr_idx, PCI_VENDOR_ID, &cr->vendor);
if (rc)
goto err;
rc = cxl_ops->afu_cr_read32(afu, cr_idx, PCI_CLASS_REVISION, &cr->class);
if (rc)
goto err;
cr->class >>= 8;
/*
* Export raw AFU PCIe like config record. For now this is read only by