Le 02/03/2018 à 10:56, Philippe Bergheaud a écrit :
P9 supports PCI tunneled operations (atomics and as_notify). This patch adds support for tunneled operations on powernv, with a new API, to be called by device drivers:pnv_pci_enable_tunnel() Enable tunnel operations, tell driver the 16-bit ASN indication used by kernel. pnv_pci_disable_tunnel() Disable tunnel operations. pnv_pci_set_tunnel_bar() Tell kernel the Tunnel BAR Response address used by driver. This function uses two new OPAL calls, as the PBCQ Tunnel BAR register is configured by skiboot. pnv_pci_get_as_notify_info() Return the ASN info of the thread to be woken up. Signed-off-by: Philippe Bergheaud <fe...@linux.vnet.ibm.com> Reviewed-by: Frederic Barrat <fbar...@linux.vnet.ibm.com> --- Changelog: v2: Do not set the ASN indication. Get it from the device tree. v3: Make pnv_pci_get_phb_node() available when compiling without cxl. v4: Add pnv_pci_get_as_notify_info(). Rebase opal call numbers on skiboot 5.9.6. v5: pnv_pci_get_tunnel_ind(): - fix node reference count pnv_pci_get_as_notify_info(): - fail if task == NULL - read pid from mm->context.id - explain that thread.tidr require CONFIG_PPC64 v6: pnv_pci_get_tunnel_ind(): - check if radix is enabled, or else return an error pnv_pci_get_as_notify_info(): - remove a capi-specific comment, irrelevant for pci v7: pnv_pci_set_tunnel_bar(): - setting the tunnel bar more than once with the same value is not an error v8: No change v9: Rename pnv_pci_get_tunnel_ind() into pnv_pci_enable_tunnel(): - Increase real window size to accept as_notify messages. New api pnv_pci_disable_tunnel(): - Restore real window size to its default value. Adjust opal call numbers. v10: Adjust opal call numbers to their final values. ---
Reviewed-by: Christophe Lombard <clomb...@linux.vnet.ibm.com>
