* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-/**
- * This file contains the isci port implementation.
- *
- *
- */
-
-
-#include <linux/workqueue.h>
#include "isci.h"
-#include "scic_io_request.h"
-#include "scic_phy.h"
-#include "scic_sds_phy.h"
-#include "scic_port.h"
#include "port.h"
#include "request.h"
-#include "core/scic_sds_controller.h"
+#include "timers.h"
-static void isci_port_change_state(
- struct isci_port *isci_port,
- enum isci_status status);
+#define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000)
+#define SCU_DUMMY_INDEX (0xFFFF)
+
+static void isci_port_change_state(struct isci_port *iport, enum isci_status status)
+{
+ unsigned long flags;
+ dev_dbg(&iport->isci_host->pdev->dev,
+ "%s: iport = %p, state = 0x%x\n",
+ __func__, iport, status);
+ /* XXX pointless lock */
+ spin_lock_irqsave(&iport->state_lock, flags);
+ iport->status = status;
+ spin_unlock_irqrestore(&iport->state_lock, flags);
+}
-/**
- * isci_port_init() - This function initializes the given isci_port object.
- * @isci_port: This parameter specifies the port object to be initialized.
- * @isci_host: This parameter specifies parent controller object for the port.
- * @index: This parameter specifies which SCU port the isci_port associates
- * with. Generally, SCU port 0 relates to isci_port 0, etc.
- *
+/*
+ * This function will indicate which protocols are supported by this port.
+ * @sci_port: a handle corresponding to the SAS port for which to return the
+ * supported protocols.
+ * @protocols: This parameter specifies a pointer to a data structure
+ * which the core will copy the protocol values for the port from the
+ * transmit_identification register.
*/
-void isci_port_init(
- struct isci_port *isci_port,
- struct isci_host *isci_host,
- int index)
+static void
+scic_sds_port_get_protocols(struct scic_sds_port *sci_port,
+ struct scic_phy_proto *protocols)
{
- struct scic_sds_port *scic_port;
- struct scic_sds_controller *controller = isci_host->core_controller;
+ u8 index;
- INIT_LIST_HEAD(&isci_port->remote_dev_list);
- INIT_LIST_HEAD(&isci_port->domain_dev_list);
- spin_lock_init(&isci_port->state_lock);
- init_completion(&isci_port->start_complete);
- isci_port->isci_host = isci_host;
- isci_port_change_state(isci_port, isci_freed);
+ protocols->all = 0;
- (void)scic_controller_get_port_handle(controller, index, &scic_port);
- sci_object_set_association(scic_port, isci_port);
- isci_port->sci_port_handle = scic_port;
+ for (index = 0; index < SCI_MAX_PHYS; index++) {
+ if (sci_port->phy_table[index] != NULL) {
+ scic_sds_phy_get_protocols(sci_port->phy_table[index],
+ protocols);
+ }
+ }
}
-
/**
- * isci_port_get_state() - This function gets the status of the port object.
- * @isci_port: This parameter points to the isci_port object
+ * This method requests a list (mask) of the phys contained in the supplied SAS
+ * port.
+ * @sci_port: a handle corresponding to the SAS port for which to return the
+ * phy mask.
*
- * status of the object as a isci_status enum.
+ * Return a bit mask indicating which phys are a part of this port. Each bit
+ * corresponds to a phy identifier (e.g. bit 0 = phy id 0).
*/
-enum isci_status isci_port_get_state(
- struct isci_port *isci_port)
+static u32 scic_sds_port_get_phys(struct scic_sds_port *sci_port)
{
- return isci_port->status;
-}
+ u32 index;
+ u32 mask;
-static void isci_port_change_state(
- struct isci_port *isci_port,
- enum isci_status status)
-{
- unsigned long flags;
+ mask = 0;
- dev_dbg(&isci_port->isci_host->pdev->dev,
- "%s: isci_port = %p, state = 0x%x\n",
- __func__, isci_port, status);
+ for (index = 0; index < SCI_MAX_PHYS; index++) {
+ if (sci_port->phy_table[index] != NULL) {
+ mask |= (1 << index);
+ }
+ }
- spin_lock_irqsave(&isci_port->state_lock, flags);
- isci_port->status = status;
- spin_unlock_irqrestore(&isci_port->state_lock, flags);
+ return mask;
}
-void isci_port_bc_change_received(
- struct isci_host *isci_host,
- struct scic_sds_port *port,
- struct scic_sds_phy *phy)
+/**
+ * scic_port_get_properties() - This method simply returns the properties
+ * regarding the port, such as: physical index, protocols, sas address, etc.
+ * @port: this parameter specifies the port for which to retrieve the physical
+ * index.
+ * @properties: This parameter specifies the properties structure into which to
+ * copy the requested information.
+ *
+ * Indicate if the user specified a valid port. SCI_SUCCESS This value is
+ * returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This
+ * value is returned if the specified port is not valid. When this value is
+ * returned, no data is copied to the properties output parameter.
+ */
+static enum sci_status scic_port_get_properties(struct scic_sds_port *port,
+ struct scic_port_properties *prop)
{
- struct isci_phy *isci_phy =
- (struct isci_phy *)sci_object_get_association(phy);
-
- dev_dbg(&isci_host->pdev->dev,
- "%s: isci_phy = %p, sas_phy = %p\n",
- __func__,
- isci_phy,
- &isci_phy->sas_phy);
+ if ((port == NULL) ||
+ (port->logical_port_index == SCIC_SDS_DUMMY_PORT))
+ return SCI_FAILURE_INVALID_PORT;
- isci_host->sas_ha.notify_port_event(
- &isci_phy->sas_phy,
- PORTE_BROADCAST_RCVD
- );
+ prop->index = port->logical_port_index;
+ prop->phy_mask = scic_sds_port_get_phys(port);
+ scic_sds_port_get_sas_address(port, &prop->local.sas_address);
+ scic_sds_port_get_protocols(port, &prop->local.protocols);
+ scic_sds_port_get_attached_sas_address(port, &prop->remote.sas_address);
- scic_port_enable_broadcast_change_notification(port);
+ return SCI_SUCCESS;
}
-/**
- * isci_port_link_up() - This function is called by the sci core when a link
- * becomes active. the identify address frame is retrieved from the core and
- * a notify port event is sent to libsas.
- * @isci_host: This parameter specifies the isci host object.
- * @port: This parameter specifies the sci port with the active link.
- * @phy: This parameter specifies the sci phy with the active link.
- *
- */
-void isci_port_link_up(
- struct isci_host *isci_host,
- struct scic_sds_port *port,
- struct scic_sds_phy *phy)
+static void isci_port_link_up(struct isci_host *isci_host,
+ struct scic_sds_port *port,
+ struct scic_sds_phy *phy)
{
unsigned long flags;
struct scic_port_properties properties;
- struct isci_phy *isci_phy
- = (struct isci_phy *)sci_object_get_association(phy);
- struct isci_port *isci_port
- = (struct isci_port *)sci_object_get_association(port);
- enum sci_status call_status;
+ struct isci_phy *isci_phy = sci_phy_to_iphy(phy);
+ struct isci_port *isci_port = sci_port_to_iport(port);
unsigned long success = true;
BUG_ON(isci_phy->isci_port != NULL);
scic_port_get_properties(port, &properties);
- if (properties.remote.protocols.u.bits.stp_target) {
+ if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) {
u64 attached_sas_address;
- struct scic_sata_phy_properties sata_phy_properties;
-
isci_phy->sas_phy.oob_mode = SATA_OOB_MODE;
-
- /* Get a copy of the signature fis for libsas */
- call_status = scic_sata_phy_get_properties(phy,
- &sata_phy_properties);
-
- /*
- * XXX I am concerned about this "assert". shouldn't we
- * handle the return appropriately?
- */
- BUG_ON(call_status != SCI_SUCCESS);
-
- memcpy(isci_phy->frame_rcvd.fis,
- &sata_phy_properties.signature_fis,
- sizeof(struct sata_fis_reg_d2h));
-
- isci_phy->sas_phy.frame_rcvd_size = sizeof(struct sata_fis_reg_d2h);
+ isci_phy->sas_phy.frame_rcvd_size = sizeof(struct dev_to_host_fis);
/*
* For direct-attached SATA devices, the SCI core will
memcpy(&isci_phy->sas_phy.attached_sas_addr,
&attached_sas_address, sizeof(attached_sas_address));
-
- } else if (properties.remote.protocols.u.bits.ssp_target ||
- properties.remote.protocols.u.bits.smp_target) {
-
- struct scic_sas_phy_properties sas_phy_properties;
-
+ } else if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) {
isci_phy->sas_phy.oob_mode = SAS_OOB_MODE;
-
- /* Get a copy of the identify address frame for libsas */
- call_status = scic_sas_phy_get_properties(phy,
- &sas_phy_properties);
-
- BUG_ON(call_status != SCI_SUCCESS);
-
- memcpy(isci_phy->frame_rcvd.aif,
- &(sas_phy_properties.received_iaf),
- sizeof(struct sci_sas_identify_address_frame));
-
- isci_phy->sas_phy.frame_rcvd_size
- = sizeof(struct sci_sas_identify_address_frame);
+ isci_phy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame);
/* Copy the attached SAS address from the IAF */
memcpy(isci_phy->sas_phy.attached_sas_addr,
- ((struct sas_identify_frame *)
- (&isci_phy->frame_rcvd.aif))->sas_addr,
- SAS_ADDR_SIZE);
-
+ isci_phy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE);
} else {
dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__);
success = false;
* @port: This parameter specifies the isci port with the active link.
*
*/
-void isci_port_link_down(struct isci_host *isci_host, struct isci_phy *isci_phy,
- struct isci_port *isci_port)
+static void isci_port_link_down(struct isci_host *isci_host,
+ struct isci_phy *isci_phy,
+ struct isci_port *isci_port)
{
struct isci_remote_device *isci_device;
}
-/**
- * isci_port_deformed() - This function is called by libsas when a port becomes
- * inactive.
- * @phy: This parameter specifies the libsas phy with the inactive port.
- *
- */
-void isci_port_deformed(
- struct asd_sas_phy *phy)
-{
- pr_debug("%s: sas_phy = %p\n", __func__, phy);
-}
-
-/**
- * isci_port_formed() - This function is called by libsas when a port becomes
- * active.
- * @phy: This parameter specifies the libsas phy with the active port.
- *
- */
-void isci_port_formed(
- struct asd_sas_phy *phy)
-{
- pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
-}
-
/**
* isci_port_ready() - This function is called by the sci core when a link
* becomes ready.
* @port: This parameter specifies the sci port with the active link.
*
*/
-void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
+static void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
{
dev_dbg(&isci_host->pdev->dev,
"%s: isci_port = %p\n", __func__, isci_port);
* @port: This parameter specifies the sci port with the active link.
*
*/
-void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
+static void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
{
dev_dbg(&isci_host->pdev->dev,
"%s: isci_port = %p\n", __func__, isci_port);
}
+static void isci_port_stop_complete(struct scic_sds_controller *scic,
+ struct scic_sds_port *sci_port,
+ enum sci_status completion_status)
+{
+ dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n");
+}
+
/**
* isci_port_hard_reset_complete() - This function is called by the sci core
* when the hard reset complete notification has been received.
* process.
*
*/
-void isci_port_hard_reset_complete(struct isci_port *isci_port,
- enum sci_status completion_status)
+static void isci_port_hard_reset_complete(struct isci_port *isci_port,
+ enum sci_status completion_status)
{
dev_dbg(&isci_port->isci_host->pdev->dev,
"%s: isci_port = %p, completion_status=%x\n",
complete_all(&isci_port->hard_reset_complete);
}
-int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
- struct isci_phy *iphy)
+/* This method will return a true value if the specified phy can be assigned to
+ * this port The following is a list of phys for each port that are allowed: -
+ * Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method
+ * doesn't preclude all configurations. It merely ensures that a phy is part
+ * of the allowable set of phy identifiers for that port. For example, one
+ * could assign phy 3 to port 0 and no other phys. Please refer to
+ * scic_sds_port_is_phy_mask_valid() for information regarding whether the
+ * phy_mask for a port can be supported. bool true if this is a valid phy
+ * assignment for the port false if this is not a valid phy assignment for the
+ * port
+ */
+bool scic_sds_port_is_valid_phy_assignment(struct scic_sds_port *sci_port,
+ u32 phy_index)
{
- unsigned long flags;
- enum sci_status status;
- int ret = TMF_RESP_FUNC_COMPLETE;
+ /* Initialize to invalid value. */
+ u32 existing_phy_index = SCI_MAX_PHYS;
+ u32 index;
- dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",
- __func__, iport);
+ if ((sci_port->physical_port_index == 1) && (phy_index != 1)) {
+ return false;
+ }
- init_completion(&iport->hard_reset_complete);
+ if (sci_port->physical_port_index == 3 && phy_index != 3) {
+ return false;
+ }
- spin_lock_irqsave(&ihost->scic_lock, flags);
+ if (
+ (sci_port->physical_port_index == 2)
+ && ((phy_index == 0) || (phy_index == 1))
+ ) {
+ return false;
+ }
- #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
- status = scic_port_hard_reset(iport->sci_port_handle,
- ISCI_PORT_RESET_TIMEOUT);
+ for (index = 0; index < SCI_MAX_PHYS; index++) {
+ if ((sci_port->phy_table[index] != NULL)
+ && (index != phy_index)) {
+ existing_phy_index = index;
+ }
+ }
- spin_unlock_irqrestore(&ihost->scic_lock, flags);
+ /*
+ * Ensure that all of the phys in the port are capable of
+ * operating at the same maximum link rate. */
+ if (
+ (existing_phy_index < SCI_MAX_PHYS)
+ && (sci_port->owning_controller->user_parameters.sds1.phys[
+ phy_index].max_speed_generation !=
+ sci_port->owning_controller->user_parameters.sds1.phys[
+ existing_phy_index].max_speed_generation)
+ )
+ return false;
+
+ return true;
+}
- if (status == SCI_SUCCESS) {
- wait_for_completion(&iport->hard_reset_complete);
+/**
+ *
+ * @sci_port: This is the port object for which to determine if the phy mask
+ * can be supported.
+ *
+ * This method will return a true value if the port's phy mask can be supported
+ * by the SCU. The following is a list of valid PHY mask configurations for
+ * each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2]
+ * - Port 3 - [3] This method returns a boolean indication specifying if the
+ * phy mask can be supported. true if this is a valid phy assignment for the
+ * port false if this is not a valid phy assignment for the port
+ */
+static bool scic_sds_port_is_phy_mask_valid(
+ struct scic_sds_port *sci_port,
+ u32 phy_mask)
+{
+ if (sci_port->physical_port_index == 0) {
+ if (((phy_mask & 0x0F) == 0x0F)
+ || ((phy_mask & 0x03) == 0x03)
+ || ((phy_mask & 0x01) == 0x01)
+ || (phy_mask == 0))
+ return true;
+ } else if (sci_port->physical_port_index == 1) {
+ if (((phy_mask & 0x02) == 0x02)
+ || (phy_mask == 0))
+ return true;
+ } else if (sci_port->physical_port_index == 2) {
+ if (((phy_mask & 0x0C) == 0x0C)
+ || ((phy_mask & 0x04) == 0x04)
+ || (phy_mask == 0))
+ return true;
+ } else if (sci_port->physical_port_index == 3) {
+ if (((phy_mask & 0x08) == 0x08)
+ || (phy_mask == 0))
+ return true;
+ }
- dev_dbg(&ihost->pdev->dev,
- "%s: iport = %p; hard reset completion\n",
- __func__, iport);
+ return false;
+}
- if (iport->hard_reset_status != SCI_SUCCESS)
- ret = TMF_RESP_FUNC_FAILED;
- } else {
- ret = TMF_RESP_FUNC_FAILED;
+/**
+ *
+ * @sci_port: This parameter specifies the port from which to return a
+ * connected phy.
+ *
+ * This method retrieves a currently active (i.e. connected) phy contained in
+ * the port. Currently, the lowest order phy that is connected is returned.
+ * This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is
+ * returned if there are no currently active (i.e. connected to a remote end
+ * point) phys contained in the port. All other values specify a struct scic_sds_phy
+ * object that is active in the port.
+ */
+static struct scic_sds_phy *scic_sds_port_get_a_connected_phy(
+ struct scic_sds_port *sci_port
+ ) {
+ u32 index;
+ struct scic_sds_phy *phy;
- dev_err(&ihost->pdev->dev,
- "%s: iport = %p; scic_port_hard_reset call"
- " failed 0x%x\n",
- __func__, iport, status);
+ for (index = 0; index < SCI_MAX_PHYS; index++) {
+ /*
+ * Ensure that the phy is both part of the port and currently
+ * connected to the remote end-point. */
+ phy = sci_port->phy_table[index];
+ if (
+ (phy != NULL)
+ && scic_sds_port_active_phy(sci_port, phy)
+ ) {
+ return phy;
+ }
+ }
+
+ return NULL;
+}
+
+/**
+ * scic_sds_port_set_phy() -
+ * @out]: port The port object to which the phy assignement is being made.
+ * @out]: phy The phy which is being assigned to the port.
+ *
+ * This method attempts to make the assignment of the phy to the port. If
+ * successful the phy is assigned to the ports phy table. bool true if the phy
+ * assignment can be made. false if the phy assignement can not be made. This
+ * is a functional test that only fails if the phy is currently assigned to a
+ * different port.
+ */
+static enum sci_status scic_sds_port_set_phy(
+ struct scic_sds_port *port,
+ struct scic_sds_phy *phy)
+{
+ /*
+ * Check to see if we can add this phy to a port
+ * that means that the phy is not part of a port and that the port does
+ * not already have a phy assinged to the phy index. */
+ if (
+ (port->phy_table[phy->phy_index] == NULL)
+ && (phy_get_non_dummy_port(phy) == NULL)
+ && scic_sds_port_is_valid_phy_assignment(port, phy->phy_index)
+ ) {
+ /*
+ * Phy is being added in the stopped state so we are in MPC mode
+ * make logical port index = physical port index */
+ port->logical_port_index = port->physical_port_index;
+ port->phy_table[phy->phy_index] = phy;
+ scic_sds_phy_set_port(phy, port);
+ return SCI_SUCCESS;
}
- /* If the hard reset for the port has failed, consider this
- * the same as link failures on all phys in the port.
+ return SCI_FAILURE;
+}
+
+/**
+ * scic_sds_port_clear_phy() -
+ * @out]: port The port from which the phy is being cleared.
+ * @out]: phy The phy being cleared from the port.
+ *
+ * This method will clear the phy assigned to this port. This method fails if
+ * this phy is not currently assinged to this port. bool true if the phy is
+ * removed from the port. false if this phy is not assined to this port.
+ */
+static enum sci_status scic_sds_port_clear_phy(
+ struct scic_sds_port *port,
+ struct scic_sds_phy *phy)
+{
+ /* Make sure that this phy is part of this port */
+ if (port->phy_table[phy->phy_index] == phy &&
+ phy_get_non_dummy_port(phy) == port) {
+ struct scic_sds_controller *scic = port->owning_controller;
+ struct isci_host *ihost = scic_to_ihost(scic);
+
+ /* Yep it is assigned to this port so remove it */
+ scic_sds_phy_set_port(phy, &ihost->ports[SCI_MAX_PORTS].sci);
+ port->phy_table[phy->phy_index] = NULL;
+ return SCI_SUCCESS;
+ }
+
+ return SCI_FAILURE;
+}
+
+
+/**
+ * This method requests the SAS address for the supplied SAS port from the SCI
+ * implementation.
+ * @sci_port: a handle corresponding to the SAS port for which to return the
+ * SAS address.
+ * @sas_address: This parameter specifies a pointer to a SAS address structure
+ * into which the core will copy the SAS address for the port.
+ *
+ */
+void scic_sds_port_get_sas_address(
+ struct scic_sds_port *sci_port,
+ struct sci_sas_address *sas_address)
+{
+ u32 index;
+
+ sas_address->high = 0;
+ sas_address->low = 0;
+
+ for (index = 0; index < SCI_MAX_PHYS; index++) {
+ if (sci_port->phy_table[index] != NULL) {
+ scic_sds_phy_get_sas_address(sci_port->phy_table[index], sas_address);
+ }
+ }
+}
+
+/*
+ * This function requests the SAS address for the device directly attached to
+ * this SAS port.
+ * @sci_port: a handle corresponding to the SAS port for which to return the
+ * SAS address.
+ * @sas_address: This parameter specifies a pointer to a SAS address structure
+ * into which the core will copy the SAS address for the device directly
+ * attached to the port.
+ *
+ */
+void scic_sds_port_get_attached_sas_address(
+ struct scic_sds_port *sci_port,
+ struct sci_sas_address *sas_address)
+{
+ struct scic_sds_phy *sci_phy;
+
+ /*
+ * Ensure that the phy is both part of the port and currently
+ * connected to the remote end-point.
*/
- if (ret != TMF_RESP_FUNC_COMPLETE) {
- dev_err(&ihost->pdev->dev,
- "%s: iport = %p; hard reset failed "
- "(0x%x) - sending link down to libsas for phy %p\n",
- __func__, iport, iport->hard_reset_status, iphy);
+ sci_phy = scic_sds_port_get_a_connected_phy(sci_port);
+ if (sci_phy) {
+ if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) {
+ scic_sds_phy_get_attached_sas_address(sci_phy,
+ sas_address);
+ } else {
+ scic_sds_phy_get_sas_address(sci_phy, sas_address);
+ sas_address->low += sci_phy->phy_index;
+ }
+ } else {
+ sas_address->high = 0;
+ sas_address->low = 0;
+ }
+}
- isci_port_link_down(ihost, iphy, iport);
+/**
+ * scic_sds_port_construct_dummy_rnc() - create dummy rnc for si workaround
+ *
+ * @sci_port: logical port on which we need to create the remote node context
+ * @rni: remote node index for this remote node context.
+ *
+ * This routine will construct a dummy remote node context data structure
+ * This structure will be posted to the hardware to work around a scheduler
+ * error in the hardware.
+ */
+static void scic_sds_port_construct_dummy_rnc(struct scic_sds_port *sci_port, u16 rni)
+{
+ union scu_remote_node_context *rnc;
+
+ rnc = &sci_port->owning_controller->remote_node_context_table[rni];
+
+ memset(rnc, 0, sizeof(union scu_remote_node_context));
+
+ rnc->ssp.remote_sas_address_hi = 0;
+ rnc->ssp.remote_sas_address_lo = 0;
+
+ rnc->ssp.remote_node_index = rni;
+ rnc->ssp.remote_node_port_width = 1;
+ rnc->ssp.logical_port_index = sci_port->physical_port_index;
+
+ rnc->ssp.nexus_loss_timer_enable = false;
+ rnc->ssp.check_bit = false;
+ rnc->ssp.is_valid = true;
+ rnc->ssp.is_remote_node_context = true;
+ rnc->ssp.function_number = 0;
+ rnc->ssp.arbitration_wait_time = 0;
+}
+
+/**
+ * scic_sds_port_construct_dummy_task() - create dummy task for si workaround
+ * @sci_port The logical port on which we need to create the
+ * remote node context.
+ * context.
+ * @tci The remote node index for this remote node context.
+ *
+ * This routine will construct a dummy task context data structure. This
+ * structure will be posted to the hardwre to work around a scheduler error
+ * in the hardware.
+ *
+ */
+static void scic_sds_port_construct_dummy_task(struct scic_sds_port *sci_port, u16 tci)
+{
+ struct scu_task_context *task_context;
+
+ task_context = scic_sds_controller_get_task_context_buffer(sci_port->owning_controller, tci);
+
+ memset(task_context, 0, sizeof(struct scu_task_context));
+
+ task_context->abort = 0;
+ task_context->priority = 0;
+ task_context->initiator_request = 1;
+ task_context->connection_rate = 1;
+ task_context->protocol_engine_index = 0;
+ task_context->logical_port_index = sci_port->physical_port_index;
+ task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP;
+ task_context->task_index = scic_sds_io_tag_get_index(tci);
+ task_context->valid = SCU_TASK_CONTEXT_VALID;
+ task_context->context_type = SCU_TASK_CONTEXT_TYPE;
+
+ task_context->remote_node_index = sci_port->reserved_rni;
+ task_context->command_code = 0;
+
+ task_context->link_layer_control = 0;
+ task_context->do_not_dma_ssp_good_response = 1;
+ task_context->strict_ordering = 0;
+ task_context->control_frame = 0;
+ task_context->timeout_enable = 0;
+ task_context->block_guard_enable = 0;
+
+ task_context->address_modifier = 0;
+
+ task_context->task_phase = 0x01;
+}
+
+static void scic_sds_port_destroy_dummy_resources(struct scic_sds_port *sci_port)
+{
+ struct scic_sds_controller *scic = sci_port->owning_controller;
+
+ if (sci_port->reserved_tci != SCU_DUMMY_INDEX)
+ scic_controller_free_io_tag(scic, sci_port->reserved_tci);
+
+ if (sci_port->reserved_rni != SCU_DUMMY_INDEX)
+ scic_sds_remote_node_table_release_remote_node_index(&scic->available_remote_nodes,
+ 1, sci_port->reserved_rni);
+
+ sci_port->reserved_rni = SCU_DUMMY_INDEX;
+ sci_port->reserved_tci = SCU_DUMMY_INDEX;
+}
+
+/**
+ * This method performs initialization of the supplied port. Initialization
+ * includes: - state machine initialization - member variable initialization
+ * - configuring the phy_mask
+ * @sci_port:
+ * @transport_layer_registers:
+ * @port_task_scheduler_registers:
+ * @port_configuration_regsiter:
+ *
+ * enum sci_status SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION This value is returned
+ * if the phy being added to the port
+ */
+enum sci_status scic_sds_port_initialize(
+ struct scic_sds_port *sci_port,
+ void __iomem *port_task_scheduler_registers,
+ void __iomem *port_configuration_regsiter,
+ void __iomem *viit_registers)
+{
+ sci_port->port_task_scheduler_registers = port_task_scheduler_registers;
+ sci_port->port_pe_configuration_register = port_configuration_regsiter;
+ sci_port->viit_registers = viit_registers;
+
+ return SCI_SUCCESS;
+}
+
+
+/**
+ * This method assigns the direct attached device ID for this port.
+ *
+ * @param[in] sci_port The port for which the direct attached device id is to
+ * be assigned.
+ * @param[in] device_id The direct attached device ID to assign to the port.
+ * This will be the RNi for the device
+ */
+void scic_sds_port_setup_transports(
+ struct scic_sds_port *sci_port,
+ u32 device_id)
+{
+ u8 index;
+
+ for (index = 0; index < SCI_MAX_PHYS; index++) {
+ if (sci_port->active_phy_mask & (1 << index))
+ scic_sds_phy_setup_transport(sci_port->phy_table[index], device_id);
}
+}
- return ret;
+/**
+ *
+ * @sci_port: This is the port on which the phy should be enabled.
+ * @sci_phy: This is the specific phy which to enable.
+ * @do_notify_user: This parameter specifies whether to inform the user (via
+ * scic_cb_port_link_up()) as to the fact that a new phy as become ready.
+ *
+ * This function will activate the phy in the port.
+ * Activation includes: - adding
+ * the phy to the port - enabling the Protocol Engine in the silicon. -
+ * notifying the user that the link is up. none
+ */
+static void scic_sds_port_activate_phy(struct scic_sds_port *sci_port,
+ struct scic_sds_phy *sci_phy,
+ bool do_notify_user)
+{
+ struct scic_sds_controller *scic = sci_port->owning_controller;
+ struct isci_host *ihost = scic_to_ihost(scic);
+
+ if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA)
+ scic_sds_phy_resume(sci_phy);
+
+ sci_port->active_phy_mask |= 1 << sci_phy->phy_index;
+
+ scic_sds_controller_clear_invalid_phy(scic, sci_phy);
+
+ if (do_notify_user == true)
+ isci_port_link_up(ihost, sci_port, sci_phy);
+}
+
+void scic_sds_port_deactivate_phy(struct scic_sds_port *sci_port,
+ struct scic_sds_phy *sci_phy,
+ bool do_notify_user)
+{
+ struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port);
+ struct isci_port *iport = sci_port_to_iport(sci_port);
+ struct isci_host *ihost = scic_to_ihost(scic);
+ struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
+
+ sci_port->active_phy_mask &= ~(1 << sci_phy->phy_index);
+
+ sci_phy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN;
+
+ /* Re-assign the phy back to the LP as if it were a narrow port */
+ writel(sci_phy->phy_index,
+ &sci_port->port_pe_configuration_register[sci_phy->phy_index]);
+
+ if (do_notify_user == true)
+ isci_port_link_down(ihost, iphy, iport);
}
/**
- * isci_port_invalid_link_up() - This function informs the SCI Core user that
- * a phy/link became ready, but the phy is not allowed in the port. In some
- * situations the underlying hardware only allows for certain phy to port
- * mappings. If these mappings are violated, then this API is invoked.
- * @controller: This parameter represents the controller which contains the
- * port.
- * @port: This parameter specifies the SCI port object for which the callback
- * is being invoked.
- * @phy: This parameter specifies the phy that came ready, but the phy can't be
- * a valid member of the port.
*
+ * @sci_port: This is the port on which the phy should be disabled.
+ * @sci_phy: This is the specific phy which to disabled.
+ *
+ * This function will disable the phy and report that the phy is not valid for
+ * this port object. None
*/
-void isci_port_invalid_link_up(struct scic_sds_controller *scic,
- struct scic_sds_port *sci_port,
- struct scic_sds_phy *phy)
+static void scic_sds_port_invalid_link_up(struct scic_sds_port *sci_port,
+ struct scic_sds_phy *sci_phy)
{
- struct isci_host *ihost = scic->ihost;
+ struct scic_sds_controller *scic = sci_port->owning_controller;
- dev_warn(&ihost->pdev->dev, "Invalid link up!\n");
+ /*
+ * Check to see if we have alreay reported this link as bad and if
+ * not go ahead and tell the SCI_USER that we have discovered an
+ * invalid link.
+ */
+ if ((scic->invalid_phy_mask & (1 << sci_phy->phy_index)) == 0) {
+ scic_sds_controller_set_invalid_phy(scic, sci_phy);
+ dev_warn(&scic_to_ihost(scic)->pdev->dev, "Invalid link up!\n");
+ }
}
-void isci_port_stop_complete(struct scic_sds_controller *scic,
- struct scic_sds_port *sci_port,
- enum sci_status completion_status)
+static bool is_port_ready_state(enum scic_sds_port_states state)
+{
+ switch (state) {
+ case SCI_BASE_PORT_STATE_READY:
+ case SCIC_SDS_PORT_READY_SUBSTATE_WAITING:
+ case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL:
+ case SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING:
+ return true;
+ default:
+ return false;
+ }
+}
+
+/* flag dummy rnc hanling when exiting a ready state */
+static void port_state_machine_change(struct scic_sds_port *sci_port,
+ enum scic_sds_port_states state)
{
- struct isci_host *ihost = scic->ihost;
+ struct sci_base_state_machine *sm = &sci_port->state_machine;
+ enum scic_sds_port_states old_state = sm->current_state_id;
+
+ if (is_port_ready_state(old_state) && !is_port_ready_state(state))
+ sci_port->ready_exit = true;
+
+ sci_base_state_machine_change_state(sm, state);
+ sci_port->ready_exit = false;
+}
- dev_dbg(&ihost->pdev->dev, "Port stop complete\n");
+/**
+ * scic_sds_port_general_link_up_handler - phy can be assigned to port?
+ * @sci_port: scic_sds_port object for which has a phy that has gone link up.
+ * @sci_phy: This is the struct scic_sds_phy object that has gone link up.
+ * @do_notify_user: This parameter specifies whether to inform the user (via
+ * scic_cb_port_link_up()) as to the fact that a new phy as become ready.
+ *
+ * Determine if this phy can be assigned to this
+ * port . If the phy is not a valid PHY for
+ * this port then the function will notify the user. A PHY can only be
+ * part of a port if it's attached SAS ADDRESS is the same as all other PHYs in
+ * the same port. none
+ */
+static void scic_sds_port_general_link_up_handler(struct scic_sds_port *sci_port,
+ struct scic_sds_phy *sci_phy,
+ bool do_notify_user)
+{
+ struct sci_sas_address port_sas_address;
+ struct sci_sas_address phy_sas_address;
+
+ scic_sds_port_get_attached_sas_address(sci_port, &port_sas_address);
+ scic_sds_phy_get_attached_sas_address(sci_phy, &phy_sas_address);
+
+ /* If the SAS address of the new phy matches the SAS address of
+ * other phys in the port OR this is the first phy in the port,
+ * then activate the phy and allow it to be used for operations
+ * in this port.
+ */
+ if ((phy_sas_address.high == port_sas_address.high &&
+ phy_sas_address.low == port_sas_address.low) ||
+ sci_port->active_phy_mask == 0) {
+ struct sci_base_state_machine *sm = &sci_port->state_machine;
+
+ scic_sds_port_activate_phy(sci_port, sci_phy, do_notify_user);
+ if (sm->current_state_id == SCI_BASE_PORT_STATE_RESETTING)
+ port_state_machine_change(sci_port, SCI_BASE_PORT_STATE_READY);
+ } else
+ scic_sds_port_invalid_link_up(sci_port, sci_phy);
+}
+
+
+
+/**
+ * This method returns false if the port only has a single phy object assigned.
+ * If there are no phys or more than one phy then the method will return
+ * true.
+ * @sci_port: The port for which the wide port condition is to be checked.
+ *
+ * bool true Is returned if this is a wide ported port. false Is returned if
+ * this is a narrow port.
+ */
+static bool scic_sds_port_is_wide(struct scic_sds_port *sci_port)
+{
+ u32 index;
+ u32 phy_count = 0;
+
+ for (index = 0; index < SCI_MAX_PHYS; index++) {
+ if (sci_port->phy_table[index] != NULL) {
+ phy_count++;
+ }
+ }
+
+ return phy_count != 1;
+}
+
+/**
+ * This method is called by the PHY object when the link is detected. if the
+ * port wants the PHY to continue on to the link up state then the port
+ * layer must return true. If the port object returns false the phy object
+ * must halt its attempt to go link up.
+ * @sci_port: The port associated with the phy object.
+ * @sci_phy: The phy object that is trying to go link up.
+ *
+ * true if the phy object can continue to the link up condition. true Is
+ * returned if this phy can continue to the ready state. false Is returned if
+ * can not continue on to the ready state. This notification is in place for
+ * wide ports and direct attached phys. Since there are no wide ported SATA
+ * devices this could become an invalid port configuration.
+ */
+bool scic_sds_port_link_detected(
+ struct scic_sds_port *sci_port,
+ struct scic_sds_phy *sci_phy)
+{
+ if ((sci_port->logical_port_index != SCIC_SDS_DUMMY_PORT) &&
+ (sci_phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) &&
+ scic_sds_port_is_wide(sci_port)) {
+ scic_sds_port_invalid_link_up(sci_port, sci_phy);
+
+ return false;
+ }
+
+ return true;
+}
+
+/**
+ * This method is provided to timeout requests for port operations. Mostly its
+ * for the port reset operation.
+ *
+ *
+ */
+static void scic_sds_port_timeout_handler(void *port)
+{
+ struct scic_sds_port *sci_port = port;
+ u32 current_state;
+
+ current_state = sci_base_state_machine_get_state(&sci_port->state_machine);
+
+ if (current_state == SCI_BASE_PORT_STATE_RESETTING) {
+ /* if the port is still in the resetting state then the timeout
+ * fired before the reset completed.
+ */
+ port_state_machine_change(sci_port, SCI_BASE_PORT_STATE_FAILED);
+ } else if (current_state == SCI_BASE_PORT_STATE_STOPPED) {
+ /* if the port is stopped then the start request failed In this
+ * case stay in the stopped state.
+ */
+ dev_err(sciport_to_dev(sci_port),
+ "%s: SCIC Port 0x%p failed to stop before tiemout.\n",
+ __func__,
+ sci_port);
+ } else if (current_state == SCI_BASE_PORT_STATE_STOPPING) {
+ /* if the port is still stopping then the stop has not completed */
+ isci_port_stop_complete(sci_port->owning_controller,
+ sci_port,
+ SCI_FAILURE_TIMEOUT);
+ } else {
+ /* The port is in the ready state and we have a timer
+ * reporting a timeout this should not happen.
+ */
+ dev_err(sciport_to_dev(sci_port),
+ "%s: SCIC Port 0x%p is processing a timeout operation "
+ "in state %d.\n", __func__, sci_port, current_state);
+ }
+}
+
+/* --------------------------------------------------------------------------- */
+
+/**
+ * This function updates the hardwares VIIT entry for this port.
+ *
+ *
+ */
+static void scic_sds_port_update_viit_entry(struct scic_sds_port *sci_port)
+{
+ struct sci_sas_address sas_address;
+
+ scic_sds_port_get_sas_address(sci_port, &sas_address);
+
+ writel(sas_address.high,
+ &sci_port->viit_registers->initiator_sas_address_hi);
+ writel(sas_address.low,
+ &sci_port->viit_registers->initiator_sas_address_lo);
+
+ /* This value get cleared just in case its not already cleared */
+ writel(0, &sci_port->viit_registers->reserved);
+
+ /* We are required to update the status register last */
+ writel(SCU_VIIT_ENTRY_ID_VIIT |
+ SCU_VIIT_IPPT_INITIATOR |
+ ((1 << sci_port->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) |
+ SCU_VIIT_STATUS_ALL_VALID,
+ &sci_port->viit_registers->status);
+}
+
+/**
+ * This method returns the maximum allowed speed for data transfers on this
+ * port. This maximum allowed speed evaluates to the maximum speed of the
+ * slowest phy in the port.
+ * @sci_port: This parameter specifies the port for which to retrieve the
+ * maximum allowed speed.
+ *
+ * This method returns the maximum negotiated speed of the slowest phy in the
+ * port.
+ */
+enum sas_linkrate scic_sds_port_get_max_allowed_speed(
+ struct scic_sds_port *sci_port)
+{
+ u16 index;
+ enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS;
+ struct scic_sds_phy *phy = NULL;
+
+ /*
+ * Loop through all of the phys in this port and find the phy with the
+ * lowest maximum link rate. */
+ for (index = 0; index < SCI_MAX_PHYS; index++) {
+ phy = sci_port->phy_table[index];
+ if (
+ (phy != NULL)
+ && (scic_sds_port_active_phy(sci_port, phy) == true)
+ && (phy->max_negotiated_speed < max_allowed_speed)
+ )
+ max_allowed_speed = phy->max_negotiated_speed;
+ }
+
+ return max_allowed_speed;
+}
+
+static void scic_port_enable_broadcast_change_notification(struct scic_sds_port *port)
+{
+ struct scic_sds_phy *phy;
+ u32 register_value;
+ u8 index;
+
+ /* Loop through all of the phys to enable BCN. */
+ for (index = 0; index < SCI_MAX_PHYS; index++) {
+ phy = port->phy_table[index];
+ if (phy != NULL) {
+ register_value =
+ readl(&phy->link_layer_registers->link_layer_control);
+
+ /* clear the bit by writing 1. */
+ writel(register_value,
+ &phy->link_layer_registers->link_layer_control);
+ }
+ }
+}
+
+/**
+ *
+ * @sci_port: This is the struct scic_sds_port object to suspend.
+ *
+ * This method will susped the port task scheduler for this port object. none
+ */
+static void
+scic_sds_port_suspend_port_task_scheduler(struct scic_sds_port *port)
+{
+ u32 pts_control_value;
+
+ pts_control_value = readl(&port->port_task_scheduler_registers->control);
+ pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND);
+ writel(pts_control_value, &port->port_task_scheduler_registers->control);
+}
+
+/**
+ * scic_sds_port_post_dummy_request() - post dummy/workaround request
+ * @sci_port: port to post task
+ *
+ * Prevent the hardware scheduler from posting new requests to the front
+ * of the scheduler queue causing a starvation problem for currently
+ * ongoing requests.
+ *
+ */
+static void scic_sds_port_post_dummy_request(struct scic_sds_port *sci_port)
+{
+ u32 command;
+ struct scu_task_context *task_context;
+ struct scic_sds_controller *scic = sci_port->owning_controller;
+ u16 tci = sci_port->reserved_tci;
+
+ task_context = scic_sds_controller_get_task_context_buffer(scic, tci);
+
+ task_context->abort = 0;
+
+ command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
+ sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
+ tci;
+
+ scic_sds_controller_post_request(scic, command);
+}
+
+/**
+ * This routine will abort the dummy request. This will alow the hardware to
+ * power down parts of the silicon to save power.
+ *
+ * @sci_port: The port on which the task must be aborted.
+ *
+ */
+static void scic_sds_port_abort_dummy_request(struct scic_sds_port *sci_port)
+{
+ struct scic_sds_controller *scic = sci_port->owning_controller;
+ u16 tci = sci_port->reserved_tci;
+ struct scu_task_context *tc;
+ u32 command;
+
+ tc = scic_sds_controller_get_task_context_buffer(scic, tci);
+
+ tc->abort = 1;
+
+ command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT |
+ sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
+ tci;
+
+ scic_sds_controller_post_request(scic, command);
+}
+
+/**
+ *
+ * @sci_port: This is the struct scic_sds_port object to resume.
+ *
+ * This method will resume the port task scheduler for this port object. none
+ */
+static void
+scic_sds_port_resume_port_task_scheduler(struct scic_sds_port *port)
+{
+ u32 pts_control_value;
+
+ pts_control_value = readl(&port->port_task_scheduler_registers->control);
+ pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND);
+ writel(pts_control_value, &port->port_task_scheduler_registers->control);
+}
+
+static void scic_sds_port_ready_substate_waiting_enter(void *object)
+{
+ struct scic_sds_port *sci_port = object;
+
+ scic_sds_port_suspend_port_task_scheduler(sci_port);
+
+ sci_port->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS;
+
+ if (sci_port->active_phy_mask != 0) {
+ /* At least one of the phys on the port is ready */
+ port_state_machine_change(sci_port,
+ SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL);
+ }
+}
+
+static void scic_sds_port_ready_substate_operational_enter(void *object)
+{
+ u32 index;
+ struct scic_sds_port *sci_port = object;
+ struct scic_sds_controller *scic = sci_port->owning_controller;
+ struct isci_host *ihost = scic_to_ihost(scic);
+ struct isci_port *iport = sci_port_to_iport(sci_port);
+
+ isci_port_ready(ihost, iport);
+
+ for (index = 0; index < SCI_MAX_PHYS; index++) {
+ if (sci_port->phy_table[index]) {
+ writel(sci_port->physical_port_index,
+ &sci_port->port_pe_configuration_register[
+ sci_port->phy_table[index]->phy_index]);
+ }
+ }
+
+ scic_sds_port_update_viit_entry(sci_port);
+
+ scic_sds_port_resume_port_task_scheduler(sci_port);
+
+ /*
+ * Post the dummy task for the port so the hardware can schedule
+ * io correctly
+ */
+ scic_sds_port_post_dummy_request(sci_port);
+}
+
+static void scic_sds_port_invalidate_dummy_remote_node(struct scic_sds_port *sci_port)
+{
+ struct scic_sds_controller *scic = sci_port->owning_controller;
+ u8 phys_index = sci_port->physical_port_index;
+ union scu_remote_node_context *rnc;
+ u16 rni = sci_port->reserved_rni;
+ u32 command;
+
+ rnc = &scic->remote_node_context_table[rni];
+
+ rnc->ssp.is_valid = false;
+
+ /* ensure the preceding tc abort request has reached the
+ * controller and give it ample time to act before posting the rnc
+ * invalidate
+ */
+ readl(&scic->smu_registers->interrupt_status); /* flush */
+ udelay(10);
+
+ command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE |
+ phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
+
+ scic_sds_controller_post_request(scic, command);
+}
+
+/**
+ *
+ * @object: This is the object which is cast to a struct scic_sds_port object.
+ *
+ * This method will perform the actions required by the struct scic_sds_port on
+ * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports
+ * the port not ready and suspends the port task scheduler. none
+ */
+static void scic_sds_port_ready_substate_operational_exit(void *object)
+{
+ struct scic_sds_port *sci_port = object;
+ struct scic_sds_controller *scic = sci_port->owning_controller;
+ struct isci_host *ihost = scic_to_ihost(scic);
+ struct isci_port *iport = sci_port_to_iport(sci_port);
+
+ /*
+ * Kill the dummy task for this port if it has not yet posted
+ * the hardware will treat this as a NOP and just return abort
+ * complete.
+ */
+ scic_sds_port_abort_dummy_request(sci_port);
+
+ isci_port_not_ready(ihost, iport);
+
+ if (sci_port->ready_exit)
+ scic_sds_port_invalidate_dummy_remote_node(sci_port);
+}
+
+static void scic_sds_port_ready_substate_configuring_enter(void *object)
+{
+ struct scic_sds_port *sci_port = object;
+ struct scic_sds_controller *scic = sci_port->owning_controller;
+ struct isci_host *ihost = scic_to_ihost(scic);
+ struct isci_port *iport = sci_port_to_iport(sci_port);
+
+ if (sci_port->active_phy_mask == 0) {
+ isci_port_not_ready(ihost, iport);
+
+ port_state_machine_change(sci_port,
+ SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
+ } else if (sci_port->started_request_count == 0)
+ port_state_machine_change(sci_port,
+ SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL);
+}
+
+static void scic_sds_port_ready_substate_configuring_exit(void *object)
+{
+ struct scic_sds_port *sci_port = object;
+
+ scic_sds_port_suspend_port_task_scheduler(sci_port);
+ if (sci_port->ready_exit)
+ scic_sds_port_invalidate_dummy_remote_node(sci_port);
+}
+
+enum sci_status scic_sds_port_start(struct scic_sds_port *sci_port)
+{
+ struct scic_sds_controller *scic = sci_port->owning_controller;
+ struct isci_host *ihost = scic_to_ihost(scic);
+ enum sci_status status = SCI_SUCCESS;
+ enum scic_sds_port_states state;
+ u32 phy_mask;
+
+ state = sci_port->state_machine.current_state_id;
+ if (state != SCI_BASE_PORT_STATE_STOPPED) {
+ dev_warn(sciport_to_dev(sci_port),
+ "%s: in wrong state: %d\n", __func__, state);
+ return SCI_FAILURE_INVALID_STATE;
+ }
+
+ if (sci_port->assigned_device_count > 0) {
+ /* TODO This is a start failure operation because
+ * there are still devices assigned to this port.
+ * There must be no devices assigned to a port on a
+ * start operation.
+ */
+ return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
+ }
+
+ sci_port->timer_handle =
+ isci_timer_create(ihost,
+ sci_port,
+ scic_sds_port_timeout_handler);
+
+ if (!sci_port->timer_handle)
+ return SCI_FAILURE_INSUFFICIENT_RESOURCES;
+
+ if (sci_port->reserved_rni == SCU_DUMMY_INDEX) {
+ u16 rni = scic_sds_remote_node_table_allocate_remote_node(
+ &scic->available_remote_nodes, 1);
+
+ if (rni != SCU_DUMMY_INDEX)
+ scic_sds_port_construct_dummy_rnc(sci_port, rni);
+ else
+ status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
+ sci_port->reserved_rni = rni;
+ }
+
+ if (sci_port->reserved_tci == SCU_DUMMY_INDEX) {
+ /* Allocate a TCI and remove the sequence nibble */
+ u16 tci = scic_controller_allocate_io_tag(scic);
+
+ if (tci != SCU_DUMMY_INDEX)
+ scic_sds_port_construct_dummy_task(sci_port, tci);
+ else
+ status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
+ sci_port->reserved_tci = tci;
+ }
+
+ if (status == SCI_SUCCESS) {
+ phy_mask = scic_sds_port_get_phys(sci_port);
+
+ /*
+ * There are one or more phys assigned to this port. Make sure
+ * the port's phy mask is in fact legal and supported by the
+ * silicon.
+ */
+ if (scic_sds_port_is_phy_mask_valid(sci_port, phy_mask) == true) {
+ port_state_machine_change(sci_port,
+ SCI_BASE_PORT_STATE_READY);
+
+ return SCI_SUCCESS;
+ }
+ status = SCI_FAILURE;
+ }
+
+ if (status != SCI_SUCCESS)
+ scic_sds_port_destroy_dummy_resources(sci_port);
+
+ return status;
+}
+
+enum sci_status scic_sds_port_stop(struct scic_sds_port *sci_port)
+{
+ enum scic_sds_port_states state;
+
+ state = sci_port->state_machine.current_state_id;
+ switch (state) {
+ case SCI_BASE_PORT_STATE_STOPPED:
+ return SCI_SUCCESS;
+ case SCIC_SDS_PORT_READY_SUBSTATE_WAITING:
+ case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL:
+ case SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING:
+ case SCI_BASE_PORT_STATE_RESETTING:
+ port_state_machine_change(sci_port,
+ SCI_BASE_PORT_STATE_STOPPING);
+ return SCI_SUCCESS;
+ default:
+ dev_warn(sciport_to_dev(sci_port),
+ "%s: in wrong state: %d\n", __func__, state);
+ return SCI_FAILURE_INVALID_STATE;
+ }
+}
+
+static enum sci_status scic_port_hard_reset(struct scic_sds_port *sci_port, u32 timeout)
+{
+ enum sci_status status = SCI_FAILURE_INVALID_PHY;
+ struct scic_sds_phy *selected_phy = NULL;
+ enum scic_sds_port_states state;
+ u32 phy_index;
+
+ state = sci_port->state_machine.current_state_id;
+ if (state != SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL) {
+ dev_warn(sciport_to_dev(sci_port),
+ "%s: in wrong state: %d\n", __func__, state);
+ return SCI_FAILURE_INVALID_STATE;
+ }
+
+ /* Select a phy on which we can send the hard reset request. */
+ for (phy_index = 0; phy_index < SCI_MAX_PHYS && !selected_phy; phy_index++) {
+ selected_phy = sci_port->phy_table[phy_index];
+ if (selected_phy &&
+ !scic_sds_port_active_phy(sci_port, selected_phy)) {
+ /*
+ * We found a phy but it is not ready select
+ * different phy
+ */
+ selected_phy = NULL;
+ }
+ }
+
+ /* If we have a phy then go ahead and start the reset procedure */
+ if (!selected_phy)
+ return status;
+ status = scic_sds_phy_reset(selected_phy);
+
+ if (status != SCI_SUCCESS)
+ return status;
+
+ isci_timer_start(sci_port->timer_handle, timeout);
+ sci_port->not_ready_reason = SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED;
+
+ port_state_machine_change(sci_port,
+ SCI_BASE_PORT_STATE_RESETTING);
+ return SCI_SUCCESS;
+}
+
+/**
+ * scic_sds_port_add_phy() -
+ * @sci_port: This parameter specifies the port in which the phy will be added.
+ * @sci_phy: This parameter is the phy which is to be added to the port.
+ *
+ * This method will add a PHY to the selected port. This method returns an
+ * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other
+ * status is a failure to add the phy to the port.
+ */
+enum sci_status scic_sds_port_add_phy(struct scic_sds_port *sci_port,
+ struct scic_sds_phy *sci_phy)
+{
+ enum sci_status status;
+ enum scic_sds_port_states state;
+
+ state = sci_port->state_machine.current_state_id;
+ switch (state) {
+ case SCI_BASE_PORT_STATE_STOPPED: {
+ struct sci_sas_address port_sas_address;
+
+ /* Read the port assigned SAS Address if there is one */
+ scic_sds_port_get_sas_address(sci_port, &port_sas_address);
+
+ if (port_sas_address.high != 0 && port_sas_address.low != 0) {
+ struct sci_sas_address phy_sas_address;
+
+ /* Make sure that the PHY SAS Address matches the SAS Address
+ * for this port
+ */
+ scic_sds_phy_get_sas_address(sci_phy, &phy_sas_address);
+
+ if (port_sas_address.high != phy_sas_address.high ||
+ port_sas_address.low != phy_sas_address.low)
+ return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
+ }
+ return scic_sds_port_set_phy(sci_port, sci_phy);
+ }
+ case SCIC_SDS_PORT_READY_SUBSTATE_WAITING:
+ case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL:
+ status = scic_sds_port_set_phy(sci_port, sci_phy);
+
+ if (status != SCI_SUCCESS)
+ return status;
+
+ scic_sds_port_general_link_up_handler(sci_port, sci_phy, true);
+ sci_port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
+ port_state_machine_change(sci_port, SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
+
+ return status;
+ case SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING:
+ status = scic_sds_port_set_phy(sci_port, sci_phy);
+
+ if (status != SCI_SUCCESS)
+ return status;
+ scic_sds_port_general_link_up_handler(sci_port, sci_phy, true);
+
+ /* Re-enter the configuring state since this may be the last phy in
+ * the port.
+ */
+ port_state_machine_change(sci_port,
+ SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
+ return SCI_SUCCESS;
+ default:
+ dev_warn(sciport_to_dev(sci_port),
+ "%s: in wrong state: %d\n", __func__, state);
+ return SCI_FAILURE_INVALID_STATE;
+ }
+}
+
+/**
+ * scic_sds_port_remove_phy() -
+ * @sci_port: This parameter specifies the port in which the phy will be added.
+ * @sci_phy: This parameter is the phy which is to be added to the port.
+ *
+ * This method will remove the PHY from the selected PORT. This method returns
+ * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any
+ * other status is a failure to add the phy to the port.
+ */
+enum sci_status scic_sds_port_remove_phy(struct scic_sds_port *sci_port,
+ struct scic_sds_phy *sci_phy)
+{
+ enum sci_status status;
+ enum scic_sds_port_states state;
+
+ state = sci_port->state_machine.current_state_id;
+
+ switch (state) {
+ case SCI_BASE_PORT_STATE_STOPPED:
+ return scic_sds_port_clear_phy(sci_port, sci_phy);
+ case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL:
+ status = scic_sds_port_clear_phy(sci_port, sci_phy);
+ if (status != SCI_SUCCESS)
+ return status;
+
+ scic_sds_port_deactivate_phy(sci_port, sci_phy, true);
+ sci_port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
+ port_state_machine_change(sci_port,
+ SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
+ return SCI_SUCCESS;
+ case SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING:
+ status = scic_sds_port_clear_phy(sci_port, sci_phy);
+
+ if (status != SCI_SUCCESS)
+ return status;
+ scic_sds_port_deactivate_phy(sci_port, sci_phy, true);
+
+ /* Re-enter the configuring state since this may be the last phy in
+ * the port
+ */
+ port_state_machine_change(sci_port,
+ SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
+ return SCI_SUCCESS;
+ default:
+ dev_warn(sciport_to_dev(sci_port),
+ "%s: in wrong state: %d\n", __func__, state);
+ return SCI_FAILURE_INVALID_STATE;
+ }
+}
+
+enum sci_status scic_sds_port_link_up(struct scic_sds_port *sci_port,
+ struct scic_sds_phy *sci_phy)
+{
+ enum scic_sds_port_states state;
+
+ state = sci_port->state_machine.current_state_id;
+ switch (state) {
+ case SCIC_SDS_PORT_READY_SUBSTATE_WAITING:
+ /* Since this is the first phy going link up for the port we
+ * can just enable it and continue
+ */
+ scic_sds_port_activate_phy(sci_port, sci_phy, true);
+
+ port_state_machine_change(sci_port,
+ SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL);
+ return SCI_SUCCESS;
+ case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL:
+ scic_sds_port_general_link_up_handler(sci_port, sci_phy, true);
+ return SCI_SUCCESS;
+ case SCI_BASE_PORT_STATE_RESETTING:
+ /* TODO We should make sure that the phy that has gone
+ * link up is the same one on which we sent the reset. It is
+ * possible that the phy on which we sent the reset is not the
+ * one that has gone link up and we want to make sure that
+ * phy being reset comes back. Consider the case where a
+ * reset is sent but before the hardware processes the reset it
+ * get a link up on the port because of a hot plug event.
+ * because of the reset request this phy will go link down
+ * almost immediately.
+ */
+
+ /* In the resetting state we don't notify the user regarding
+ * link up and link down notifications.
+ */
+ scic_sds_port_general_link_up_handler(sci_port, sci_phy, false);
+ return SCI_SUCCESS;
+ default:
+ dev_warn(sciport_to_dev(sci_port),
+ "%s: in wrong state: %d\n", __func__, state);
+ return SCI_FAILURE_INVALID_STATE;
+ }
+}
+
+enum sci_status scic_sds_port_link_down(struct scic_sds_port *sci_port,
+ struct scic_sds_phy *sci_phy)
+{
+ enum scic_sds_port_states state;
+
+ state = sci_port->state_machine.current_state_id;
+ switch (state) {
+ case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL:
+ scic_sds_port_deactivate_phy(sci_port, sci_phy, true);
+
+ /* If there are no active phys left in the port, then
+ * transition the port to the WAITING state until such time
+ * as a phy goes link up
+ */
+ if (sci_port->active_phy_mask == 0)
+ port_state_machine_change(sci_port,
+ SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
+ return SCI_SUCCESS;
+ case SCI_BASE_PORT_STATE_RESETTING:
+ /* In the resetting state we don't notify the user regarding
+ * link up and link down notifications. */
+ scic_sds_port_deactivate_phy(sci_port, sci_phy, false);
+ return SCI_SUCCESS;
+ default:
+ dev_warn(sciport_to_dev(sci_port),
+ "%s: in wrong state: %d\n", __func__, state);
+ return SCI_FAILURE_INVALID_STATE;
+ }
+}
+
+enum sci_status scic_sds_port_start_io(struct scic_sds_port *sci_port,
+ struct scic_sds_remote_device *sci_dev,
+ struct scic_sds_request *sci_req)
+{
+ enum scic_sds_port_states state;
+
+ state = sci_port->state_machine.current_state_id;
+ switch (state) {
+ case SCIC_SDS_PORT_READY_SUBSTATE_WAITING:
+ return SCI_FAILURE_INVALID_STATE;
+ case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL:
+ sci_port->started_request_count++;
+ return SCI_SUCCESS;
+ default:
+ dev_warn(sciport_to_dev(sci_port),
+ "%s: in wrong state: %d\n", __func__, state);
+ return SCI_FAILURE_INVALID_STATE;
+ }
+}
+
+enum sci_status scic_sds_port_complete_io(struct scic_sds_port *sci_port,
+ struct scic_sds_remote_device *sci_dev,
+ struct scic_sds_request *sci_req)
+{
+ enum scic_sds_port_states state;
+
+ state = sci_port->state_machine.current_state_id;
+ switch (state) {
+ case SCI_BASE_PORT_STATE_STOPPED:
+ dev_warn(sciport_to_dev(sci_port),
+ "%s: in wrong state: %d\n", __func__, state);
+ return SCI_FAILURE_INVALID_STATE;
+ case SCI_BASE_PORT_STATE_STOPPING:
+ scic_sds_port_decrement_request_count(sci_port);
+
+ if (sci_port->started_request_count == 0)
+ port_state_machine_change(sci_port,
+ SCI_BASE_PORT_STATE_STOPPED);
+ break;
+ case SCI_BASE_PORT_STATE_READY:
+ case SCI_BASE_PORT_STATE_RESETTING:
+ case SCI_BASE_PORT_STATE_FAILED:
+ case SCIC_SDS_PORT_READY_SUBSTATE_WAITING:
+ case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL:
+ scic_sds_port_decrement_request_count(sci_port);
+ break;
+ case SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING:
+ scic_sds_port_decrement_request_count(sci_port);
+ if (sci_port->started_request_count == 0) {
+ port_state_machine_change(sci_port,
+ SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL);
+ }
+ break;
+ }
+ return SCI_SUCCESS;
+}
+
+/**
+ *
+ * @sci_port: This is the port object which to suspend.
+ *
+ * This method will enable the SCU Port Task Scheduler for this port object but
+ * will leave the port task scheduler in a suspended state. none
+ */
+static void
+scic_sds_port_enable_port_task_scheduler(struct scic_sds_port *port)
+{
+ u32 pts_control_value;
+
+ pts_control_value = readl(&port->port_task_scheduler_registers->control);
+ pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND);
+ writel(pts_control_value, &port->port_task_scheduler_registers->control);
+}
+
+/**
+ *
+ * @sci_port: This is the port object which to resume.
+ *
+ * This method will disable the SCU port task scheduler for this port object.
+ * none
+ */
+static void
+scic_sds_port_disable_port_task_scheduler(struct scic_sds_port *port)
+{
+ u32 pts_control_value;
+
+ pts_control_value = readl(&port->port_task_scheduler_registers->control);
+ pts_control_value &=
+ ~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND));
+ writel(pts_control_value, &port->port_task_scheduler_registers->control);
+}
+
+static void scic_sds_port_post_dummy_remote_node(struct scic_sds_port *sci_port)
+{
+ struct scic_sds_controller *scic = sci_port->owning_controller;
+ u8 phys_index = sci_port->physical_port_index;
+ union scu_remote_node_context *rnc;
+ u16 rni = sci_port->reserved_rni;
+ u32 command;
+
+ rnc = &scic->remote_node_context_table[rni];
+ rnc->ssp.is_valid = true;
+
+ command = SCU_CONTEXT_COMMAND_POST_RNC_32 |
+ phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
+
+ scic_sds_controller_post_request(scic, command);
+
+ /* ensure hardware has seen the post rnc command and give it
+ * ample time to act before sending the suspend
+ */
+ readl(&scic->smu_registers->interrupt_status); /* flush */
+ udelay(10);
+
+ command = SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX |
+ phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
+
+ scic_sds_controller_post_request(scic, command);
+}
+
+static void scic_sds_port_stopped_state_enter(void *object)
+{
+ struct scic_sds_port *sci_port = object;
+
+ if (sci_port->state_machine.previous_state_id == SCI_BASE_PORT_STATE_STOPPING) {
+ /*
+ * If we enter this state becasuse of a request to stop
+ * the port then we want to disable the hardwares port
+ * task scheduler. */
+ scic_sds_port_disable_port_task_scheduler(sci_port);
+ }
+}
+
+static void scic_sds_port_stopped_state_exit(void *object)
+{
+ struct scic_sds_port *sci_port = object;
+
+ /* Enable and suspend the port task scheduler */
+ scic_sds_port_enable_port_task_scheduler(sci_port);
+}
+
+static void scic_sds_port_ready_state_enter(void *object)
+{
+ struct scic_sds_port *sci_port = object;
+ struct scic_sds_controller *scic = sci_port->owning_controller;
+ struct isci_host *ihost = scic_to_ihost(scic);
+ struct isci_port *iport = sci_port_to_iport(sci_port);
+ u32 prev_state;
+
+ prev_state = sci_port->state_machine.previous_state_id;
+ if (prev_state == SCI_BASE_PORT_STATE_RESETTING)
+ isci_port_hard_reset_complete(iport, SCI_SUCCESS);
+ else
+ isci_port_not_ready(ihost, iport);
+
+ /* Post and suspend the dummy remote node context for this port. */
+ scic_sds_port_post_dummy_remote_node(sci_port);
+
+ /* Start the ready substate machine */
+ port_state_machine_change(sci_port,
+ SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
+}
+
+static void scic_sds_port_resetting_state_exit(void *object)
+{
+ struct scic_sds_port *sci_port = object;
+
+ isci_timer_stop(sci_port->timer_handle);
+}
+
+static void scic_sds_port_stopping_state_exit(void *object)
+{
+ struct scic_sds_port *sci_port = object;
+
+ isci_timer_stop(sci_port->timer_handle);
+
+ scic_sds_port_destroy_dummy_resources(sci_port);
+}
+
+static void scic_sds_port_failed_state_enter(void *object)
+{
+ struct scic_sds_port *sci_port = object;
+ struct isci_port *iport = sci_port_to_iport(sci_port);
+
+ isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT);
+}
+
+/* --------------------------------------------------------------------------- */
+
+static const struct sci_base_state scic_sds_port_state_table[] = {
+ [SCI_BASE_PORT_STATE_STOPPED] = {
+ .enter_state = scic_sds_port_stopped_state_enter,
+ .exit_state = scic_sds_port_stopped_state_exit
+ },
+ [SCI_BASE_PORT_STATE_STOPPING] = {
+ .exit_state = scic_sds_port_stopping_state_exit
+ },
+ [SCI_BASE_PORT_STATE_READY] = {
+ .enter_state = scic_sds_port_ready_state_enter,
+ },
+ [SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = {
+ .enter_state = scic_sds_port_ready_substate_waiting_enter,
+ },
+ [SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = {
+ .enter_state = scic_sds_port_ready_substate_operational_enter,
+ .exit_state = scic_sds_port_ready_substate_operational_exit
+ },
+ [SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = {
+ .enter_state = scic_sds_port_ready_substate_configuring_enter,
+ .exit_state = scic_sds_port_ready_substate_configuring_exit
+ },
+ [SCI_BASE_PORT_STATE_RESETTING] = {
+ .exit_state = scic_sds_port_resetting_state_exit
+ },
+ [SCI_BASE_PORT_STATE_FAILED] = {
+ .enter_state = scic_sds_port_failed_state_enter,
+ }
+};
+
+void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 index,
+ struct scic_sds_controller *scic)
+{
+ sci_base_state_machine_construct(&sci_port->state_machine,
+ sci_port,
+ scic_sds_port_state_table,
+ SCI_BASE_PORT_STATE_STOPPED);
+
+ sci_base_state_machine_start(&sci_port->state_machine);
+
+ sci_port->logical_port_index = SCIC_SDS_DUMMY_PORT;
+ sci_port->physical_port_index = index;
+ sci_port->active_phy_mask = 0;
+ sci_port->ready_exit = false;
+
+ sci_port->owning_controller = scic;
+
+ sci_port->started_request_count = 0;
+ sci_port->assigned_device_count = 0;
+
+ sci_port->reserved_rni = SCU_DUMMY_INDEX;
+ sci_port->reserved_tci = SCU_DUMMY_INDEX;
+
+ sci_port->timer_handle = NULL;
+ sci_port->port_task_scheduler_registers = NULL;
+
+ for (index = 0; index < SCI_MAX_PHYS; index++)
+ sci_port->phy_table[index] = NULL;
+}
+
+void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index)
+{
+ INIT_LIST_HEAD(&iport->remote_dev_list);
+ INIT_LIST_HEAD(&iport->domain_dev_list);
+ spin_lock_init(&iport->state_lock);
+ init_completion(&iport->start_complete);
+ iport->isci_host = ihost;
+ isci_port_change_state(iport, isci_freed);
+}
+
+/**
+ * isci_port_get_state() - This function gets the status of the port object.
+ * @isci_port: This parameter points to the isci_port object
+ *
+ * status of the object as a isci_status enum.
+ */
+enum isci_status isci_port_get_state(
+ struct isci_port *isci_port)
+{
+ return isci_port->status;
+}
+
+static void isci_port_bc_change_received(struct isci_host *ihost,
+ struct scic_sds_port *sci_port,
+ struct scic_sds_phy *sci_phy)
+{
+ struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
+
+ dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n",
+ __func__, iphy, &iphy->sas_phy);
+
+ ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD);
+ scic_port_enable_broadcast_change_notification(sci_port);
+}
+
+void scic_sds_port_broadcast_change_received(
+ struct scic_sds_port *sci_port,
+ struct scic_sds_phy *sci_phy)
+{
+ struct scic_sds_controller *scic = sci_port->owning_controller;
+ struct isci_host *ihost = scic_to_ihost(scic);
+
+ /* notify the user. */
+ isci_port_bc_change_received(ihost, sci_port, sci_phy);
+}
+
+int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
+ struct isci_phy *iphy)
+{
+ unsigned long flags;
+ enum sci_status status;
+ int ret = TMF_RESP_FUNC_COMPLETE;
+
+ dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",
+ __func__, iport);
+
+ init_completion(&iport->hard_reset_complete);
+
+ spin_lock_irqsave(&ihost->scic_lock, flags);
+
+ #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
+ status = scic_port_hard_reset(&iport->sci, ISCI_PORT_RESET_TIMEOUT);
+
+ spin_unlock_irqrestore(&ihost->scic_lock, flags);
+
+ if (status == SCI_SUCCESS) {
+ wait_for_completion(&iport->hard_reset_complete);
+
+ dev_dbg(&ihost->pdev->dev,
+ "%s: iport = %p; hard reset completion\n",
+ __func__, iport);
+
+ if (iport->hard_reset_status != SCI_SUCCESS)
+ ret = TMF_RESP_FUNC_FAILED;
+ } else {
+ ret = TMF_RESP_FUNC_FAILED;
+
+ dev_err(&ihost->pdev->dev,
+ "%s: iport = %p; scic_port_hard_reset call"
+ " failed 0x%x\n",
+ __func__, iport, status);
+
+ }
+
+ /* If the hard reset for the port has failed, consider this
+ * the same as link failures on all phys in the port.
+ */
+ if (ret != TMF_RESP_FUNC_COMPLETE) {
+ dev_err(&ihost->pdev->dev,
+ "%s: iport = %p; hard reset failed "
+ "(0x%x) - sending link down to libsas for phy %p\n",
+ __func__, iport, iport->hard_reset_status, iphy);
+
+ isci_port_link_down(ihost, iphy, iport);
+ }
+
+ return ret;
+}
+
+/**
+ * isci_port_deformed() - This function is called by libsas when a port becomes
+ * inactive.
+ * @phy: This parameter specifies the libsas phy with the inactive port.
+ *
+ */
+void isci_port_deformed(struct asd_sas_phy *phy)
+{
+ pr_debug("%s: sas_phy = %p\n", __func__, phy);
+}
+
+/**
+ * isci_port_formed() - This function is called by libsas when a port becomes
+ * active.
+ * @phy: This parameter specifies the libsas phy with the active port.
+ *
+ */
+void isci_port_formed(struct asd_sas_phy *phy)
+{
+ pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff