Merge branch 'wip-2.6.34' into old-private-masterarchived-private-master

1 files changed, 82 insertions, 31 deletions

diff --git a/drivers/scsi/bfa/bfa_intr.c b/drivers/scsi/bfa/bfa_intr.c
index 0ca125712a04..0eba3f930d5b 100644
--- a/drivers/scsi/bfa/bfa_intr.c
+++ b/drivers/scsi/bfa/bfa_intr.c
@@ -15,7 +15,7 @@
  * General Public License for more details.
  */
 #include <bfa.h>
-#include <bfi/bfi_cbreg.h>
+#include <bfi/bfi_ctreg.h>
 #include <bfa_port_priv.h>
 #include <bfa_intr_priv.h>
 #include <cs/bfa_debug.h>
@@ -34,6 +34,26 @@ bfa_msix_lpu(struct bfa_s *bfa)
         bfa_ioc_mbox_isr(&bfa->ioc);
 }
 
+static void
+bfa_reqq_resume(struct bfa_s *bfa, int qid)
+{
+        struct list_head *waitq, *qe, *qen;
+        struct bfa_reqq_wait_s *wqe;
+
+        waitq = bfa_reqq(bfa, qid);
+        list_for_each_safe(qe, qen, waitq) {
+                /**
+                 * Callback only as long as there is room in request queue
+                 */
+                if (bfa_reqq_full(bfa, qid))
+                        break;
+
+                list_del(qe);
+                wqe = (struct bfa_reqq_wait_s *) qe;
+                wqe->qresume(wqe->cbarg);
+        }
+}
+
 void
 bfa_msix_all(struct bfa_s *bfa, int vec)
 {
@@ -59,7 +79,7 @@ bfa_intx(struct bfa_s *bfa)
         qintr = intr & __HFN_INT_RME_MASK;
         bfa_reg_write(bfa->iocfc.bfa_regs.intr_status, qintr);
 
-        for (queue = 0; queue < BFI_IOC_MAX_CQS_ASIC; queue ++) {
+        for (queue = 0; queue < BFI_IOC_MAX_CQS_ASIC; queue++) {
                 if (intr & (__HFN_INT_RME_Q0 << queue))
                         bfa_msix_rspq(bfa, queue & (BFI_IOC_MAX_CQS - 1));
         }
@@ -96,7 +116,8 @@ bfa_isr_enable(struct bfa_s *bfa)
 
         bfa_msix_install(bfa);
         intr_unmask = (__HFN_INT_ERR_EMC | __HFN_INT_ERR_LPU0 |
-                       __HFN_INT_ERR_LPU1 | __HFN_INT_ERR_PSS);
+                       __HFN_INT_ERR_LPU1 | __HFN_INT_ERR_PSS |
+                       __HFN_INT_LL_HALT);
 
         if (pci_func == 0)
                 intr_unmask |= (__HFN_INT_CPE_Q0 | __HFN_INT_CPE_Q1 |
@@ -127,23 +148,18 @@ bfa_isr_disable(struct bfa_s *bfa)
 void
 bfa_msix_reqq(struct bfa_s *bfa, int qid)
 {
-        struct list_head                *waitq, *qe, *qen;
-        struct bfa_reqq_wait_s  *wqe;
+        struct list_head *waitq;
 
         qid &= (BFI_IOC_MAX_CQS - 1);
 
-        waitq = bfa_reqq(bfa, qid);
-        list_for_each_safe(qe, qen, waitq) {
-                /**
-                 * Callback only as long as there is room in request queue
-                 */
-                if (bfa_reqq_full(bfa, qid))
-                        break;
+        bfa->iocfc.hwif.hw_reqq_ack(bfa, qid);
 
-                list_del(qe);
-                wqe = (struct bfa_reqq_wait_s *) qe;
-                wqe->qresume(wqe->cbarg);
-        }
+        /**
+         * Resume any pending requests in the corresponding reqq.
+         */
+        waitq = bfa_reqq(bfa, qid);
+        if (!list_empty(waitq))
+                bfa_reqq_resume(bfa, qid);
 }
 
 void
@@ -157,26 +173,27 @@ bfa_isr_unhandled(struct bfa_s *bfa, struct bfi_msg_s *m)
 }
 
 void
-bfa_msix_rspq(struct bfa_s *bfa, int rsp_qid)
+bfa_msix_rspq(struct bfa_s *bfa, int qid)
 {
-        struct bfi_msg_s      *m;
-        u32        pi, ci;
+        struct bfi_msg_s *m;
+        u32 pi, ci;
+        struct list_head *waitq;
 
-        bfa_trc_fp(bfa, rsp_qid);
+        bfa_trc_fp(bfa, qid);
 
-        rsp_qid &= (BFI_IOC_MAX_CQS - 1);
+        qid &= (BFI_IOC_MAX_CQS - 1);
 
-        bfa->iocfc.hwif.hw_rspq_ack(bfa, rsp_qid);
+        bfa->iocfc.hwif.hw_rspq_ack(bfa, qid);
 
-        ci = bfa_rspq_ci(bfa, rsp_qid);
-        pi = bfa_rspq_pi(bfa, rsp_qid);
+        ci = bfa_rspq_ci(bfa, qid);
+        pi = bfa_rspq_pi(bfa, qid);
 
         bfa_trc_fp(bfa, ci);
         bfa_trc_fp(bfa, pi);
 
         if (bfa->rme_process) {
                 while (ci != pi) {
-                        m = bfa_rspq_elem(bfa, rsp_qid, ci);
+                        m = bfa_rspq_elem(bfa, qid, ci);
                         bfa_assert_fp(m->mhdr.msg_class < BFI_MC_MAX);
 
                         bfa_isrs[m->mhdr.msg_class] (bfa, m);
@@ -188,25 +205,59 @@ bfa_msix_rspq(struct bfa_s *bfa, int rsp_qid)
         /**
          * update CI
          */
-        bfa_rspq_ci(bfa, rsp_qid) = pi;
-        bfa_reg_write(bfa->iocfc.bfa_regs.rme_q_ci[rsp_qid], pi);
+        bfa_rspq_ci(bfa, qid) = pi;
+        bfa_reg_write(bfa->iocfc.bfa_regs.rme_q_ci[qid], pi);
         bfa_os_mmiowb();
+
+        /**
+         * Resume any pending requests in the corresponding reqq.
+         */
+        waitq = bfa_reqq(bfa, qid);
+        if (!list_empty(waitq))
+                bfa_reqq_resume(bfa, qid);
 }
 
 void
 bfa_msix_lpu_err(struct bfa_s *bfa, int vec)
 {
-        u32 intr;
+        u32 intr, curr_value;
 
         intr = bfa_reg_read(bfa->iocfc.bfa_regs.intr_status);
 
         if (intr & (__HFN_INT_MBOX_LPU0 | __HFN_INT_MBOX_LPU1))
                 bfa_msix_lpu(bfa);
 
-        if (intr & (__HFN_INT_ERR_EMC |
-                    __HFN_INT_ERR_LPU0 | __HFN_INT_ERR_LPU1 |
-                    __HFN_INT_ERR_PSS))
+        intr &= (__HFN_INT_ERR_EMC | __HFN_INT_ERR_LPU0 |
+                __HFN_INT_ERR_LPU1 | __HFN_INT_ERR_PSS | __HFN_INT_LL_HALT);
+
+        if (intr) {
+                if (intr & __HFN_INT_LL_HALT) {
+                        /**
+                         * If LL_HALT bit is set then FW Init Halt LL Port
+                         * Register needs to be cleared as well so Interrupt
+                         * Status Register will be cleared.
+                         */
+                        curr_value = bfa_reg_read(bfa->ioc.ioc_regs.ll_halt);
+                        curr_value &= ~__FW_INIT_HALT_P;
+                        bfa_reg_write(bfa->ioc.ioc_regs.ll_halt, curr_value);
+                }
+
+                if (intr & __HFN_INT_ERR_PSS) {
+                        /**
+                         * ERR_PSS bit needs to be cleared as well in case
+                         * interrups are shared so driver's interrupt handler is
+                         * still called eventhough it is already masked out.
+                         */
+                        curr_value = bfa_reg_read(
+                                bfa->ioc.ioc_regs.pss_err_status_reg);
+                        curr_value &= __PSS_ERR_STATUS_SET;
+                        bfa_reg_write(bfa->ioc.ioc_regs.pss_err_status_reg,
+                                curr_value);
+                }
+
+                bfa_reg_write(bfa->iocfc.bfa_regs.intr_status, intr);
                 bfa_msix_errint(bfa, intr);
+        }
 }
 
 void