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| author |   Christophe Lombard <clombard@linux.vnet.ibm.com> | 2016-03-04 12:26:38 +0100 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2016-03-09 23:39:56 +1100 |
| commit | 594ff7d067ca42676e27e2a7b5dcc0ff039d08ca (patch) | |
| tree | 45824c4fb92c9450b86bfbb9ff19a0dd17cd2c93 /drivers/misc/cxl/guest.c | |
| parent | cxl: sysfs support for guests (diff) | |
| download | linux-dev-594ff7d067ca42676e27e2a7b5dcc0ff039d08ca.tar.xz linux-dev-594ff7d067ca42676e27e2a7b5dcc0ff039d08ca.zip | |
cxl: Support to flash a new image on the adapter from a guest
The new flash.c file contains the logic to flash a new image on the
adapter, through a hcall. It is an iterative process, with chunks of
data of 1M at a time. There are also 2 phases: write and verify. The
flash operation itself is driven from a user-land tool.
Once flashing is successful, an rtas call is made to update the device
tree with the new properties values for the adapter and the AFU(s)
Add a new char device for the adapter, so that the flash tool can
access the card, even if there is no valid AFU on it.
Co-authored-by: Frederic Barrat <fbarrat@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>
Diffstat (limited to 'drivers/misc/cxl/guest.c')
| -rw-r--r-- | drivers/misc/cxl/guest.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/misc/cxl/guest.c b/drivers/misc/cxl/guest.c index b1b8ac5195e7..816113d9d19b 100644 --- a/drivers/misc/cxl/guest.c +++ b/drivers/misc/cxl/guest.c @@ -889,6 +889,7 @@ void cxl_guest_remove_adapter(struct cxl *adapter) cxl_sysfs_adapter_remove(adapter); + cxl_guest_remove_chardev(adapter); device_unregister(&adapter->dev); } @@ -926,6 +927,9 @@ struct cxl *cxl_guest_init_adapter(struct device_node *np, struct platform_devic if ((rc = properties_look_ok(adapter))) goto err1; + if ((rc = cxl_guest_add_chardev(adapter))) + goto err1; + /* * After we call this function we must not free the adapter directly, * even if it returns an error! @@ -941,12 +945,23 @@ struct cxl *cxl_guest_init_adapter(struct device_node *np, struct platform_devic err_put1: device_unregister(&adapter->dev); free = false; + cxl_guest_remove_chardev(adapter); err1: if (free) free_adapter(adapter); return ERR_PTR(rc); } +void cxl_guest_reload_module(struct cxl *adapter) +{ + struct platform_device *pdev; + + pdev = adapter->guest->pdev; + cxl_guest_remove_adapter(adapter); + + cxl_of_probe(pdev); +} + const struct cxl_backend_ops cxl_guest_ops = { .module = THIS_MODULE, .adapter_reset = guest_reset, |