isci: refactor initialization for S3/S4

Based on an original implementation by Ed Nadolski and Artur Wojcik

In preparation for S3/S4 support refactor initialization so that
driver-load and resume-from-suspend can share the common init path of
isci_host_init().  Organize the initialization into objects that are
self-contained to the driver (initialized by isci_host_init) versus
those that have some upward registration (initialized at allocation time
asd_sas_phy, asd_sas_port, dma allocations).  The largest change is
moving the the validation of the oem and module parameters from
isci_host_init() to isci_host_alloc().

The S3/S4 approach being taken is that libsas will be tasked with
remembering the state of the domain and the lldd is free to be
forgetful.  In the case of isci we'll just re-init using a subset of the
normal driver load path.

[clean up some unused / mis-indented function definitions in host.h]

Signed-off-by: Ed Nadolski <edmund.nadolski@intel.com>
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 19 insertions, 52 deletions

diff --git a/drivers/scsi/isci/host.h b/drivers/scsi/isci/host.h
index 81485b4a1a51..4695162f406e 100644
--- a/drivers/scsi/isci/host.h
+++ b/drivers/scsi/isci/host.h
@@ -158,13 +158,17 @@ struct isci_host {
 	struct sci_power_control power_control;
 	u8 io_request_sequence[SCI_MAX_IO_REQUESTS];
 	struct scu_task_context *task_context_table;
-	dma_addr_t task_context_dma;
+	dma_addr_t tc_dma;
 	union scu_remote_node_context *remote_node_context_table;
+	dma_addr_t rnc_dma;
 	u32 *completion_queue;
+	dma_addr_t cq_dma;
 	u32 completion_queue_get;
 	u32 logical_port_entries;
 	u32 remote_node_entries;
 	u32 task_context_entries;
+	void *ufi_buf;
+	dma_addr_t ufi_dma;
 	struct sci_unsolicited_frame_control uf_control;
 
 	/* phy startup */
@@ -452,36 +456,17 @@ void sci_controller_free_remote_node_context(
 	struct isci_remote_device *idev,
 	u16 node_id);
 
-struct isci_request *sci_request_by_tag(struct isci_host *ihost,
-					     u16 io_tag);
-
-void sci_controller_power_control_queue_insert(
-	struct isci_host *ihost,
-	struct isci_phy *iphy);
-
-void sci_controller_power_control_queue_remove(
-	struct isci_host *ihost,
-	struct isci_phy *iphy);
-
-void sci_controller_link_up(
-	struct isci_host *ihost,
-	struct isci_port *iport,
-	struct isci_phy *iphy);
-
-void sci_controller_link_down(
-	struct isci_host *ihost,
-	struct isci_port *iport,
-	struct isci_phy *iphy);
-
-void sci_controller_remote_device_stopped(
-	struct isci_host *ihost,
-	struct isci_remote_device *idev);
-
-void sci_controller_copy_task_context(
-	struct isci_host *ihost,
-	struct isci_request *ireq);
-
-void sci_controller_register_setup(struct isci_host *ihost);
+struct isci_request *sci_request_by_tag(struct isci_host *ihost, u16 io_tag);
+void sci_controller_power_control_queue_insert(struct isci_host *ihost,
+					       struct isci_phy *iphy);
+void sci_controller_power_control_queue_remove(struct isci_host *ihost,
+					       struct isci_phy *iphy);
+void sci_controller_link_up(struct isci_host *ihost, struct isci_port *iport,
+			    struct isci_phy *iphy);
+void sci_controller_link_down(struct isci_host *ihost, struct isci_port *iport,
+			      struct isci_phy *iphy);
+void sci_controller_remote_device_stopped(struct isci_host *ihost,
+					  struct isci_remote_device *idev);
 
 enum sci_status sci_controller_continue_io(struct isci_request *ireq);
 int isci_host_scan_finished(struct Scsi_Host *, unsigned long);
@@ -491,27 +476,9 @@ enum sci_status isci_free_tag(struct isci_host *ihost, u16 io_tag);
 void isci_tci_free(struct isci_host *ihost, u16 tci);
 
 int isci_host_init(struct isci_host *);
-
-void isci_host_init_controller_names(
-	struct isci_host *isci_host,
-	unsigned int controller_idx);
-
-void isci_host_deinit(
-	struct isci_host *);
-
-void isci_host_port_link_up(
-	struct isci_host *,
-	struct isci_port *,
-	struct isci_phy *);
-int isci_host_dev_found(struct domain_device *);
-
-void isci_host_remote_device_start_complete(
-	struct isci_host *,
-	struct isci_remote_device *,
-	enum sci_status);
-
-void sci_controller_disable_interrupts(
-	struct isci_host *ihost);
+void isci_host_completion_routine(unsigned long data);
+void isci_host_deinit(struct isci_host *);
+void sci_controller_disable_interrupts(struct isci_host *ihost);
 
 enum sci_status sci_controller_start_io(
 	struct isci_host *ihost,