scsi: csiostor: switch to pci_alloc_irq_vectors

And get automatic MSI-X affinity for free.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/csiostor/csio_hw.h b/drivers/scsi/csiostor/csio_hw.h
index 029bef82c0576ebe66d14f13b705b63197fedd76..62758e830d3bf1562468d45af196fa2a7f8197a2 100644 (file)
--- a/drivers/scsi/csiostor/csio_hw.h
+++ b/drivers/scsi/csiostor/csio_hw.h
@@ -95,7 +95,6 @@ enum {
 };
 
 struct csio_msix_entries {
-       unsigned short  vector;         /* Assigned MSI-X vector */
        void            *dev_id;        /* Priv object associated w/ this msix*/
        char            desc[24];       /* Description of this vector */
 };

diff --git a/drivers/scsi/csiostor/csio_isr.c b/drivers/scsi/csiostor/csio_isr.c
index 2fb71c6c3b3723bcdf0485341502931b7843da61..7c881471571162adc99d70f0b9daaa641ba2909a 100644 (file)
--- a/drivers/scsi/csiostor/csio_isr.c
+++ b/drivers/scsi/csiostor/csio_isr.c
@@ -383,17 +383,15 @@ csio_request_irqs(struct csio_hw *hw)
        int rv, i, j, k = 0;
        struct csio_msix_entries *entryp = &hw->msix_entries[0];
        struct csio_scsi_cpu_info *info;
+       struct pci_dev *pdev = hw->pdev;
 
        if (hw->intr_mode != CSIO_IM_MSIX) {
-               rv = request_irq(hw->pdev->irq, csio_fcoe_isr,
-                                       (hw->intr_mode == CSIO_IM_MSI) ?
-                                                       0 : IRQF_SHARED,
-                                       KBUILD_MODNAME, hw);
+               rv = request_irq(pci_irq_vector(pdev, 0), csio_fcoe_isr,
+                               hw->intr_mode == CSIO_IM_MSI ? 0 : IRQF_SHARED,
+                               KBUILD_MODNAME, hw);
                if (rv) {
-                       if (hw->intr_mode == CSIO_IM_MSI)
-                               pci_disable_msi(hw->pdev);
                        csio_err(hw, "Failed to allocate interrupt line.\n");
-                       return -EINVAL;
+                       goto out_free_irqs;
                }
 
                goto out;
@@ -402,22 +400,22 @@ csio_request_irqs(struct csio_hw *hw)
        /* Add the MSIX vector descriptions */
        csio_add_msix_desc(hw);
 
-       rv = request_irq(entryp[k].vector, csio_nondata_isr, 0,
+       rv = request_irq(pci_irq_vector(pdev, k), csio_nondata_isr, 0,
                         entryp[k].desc, hw);
        if (rv) {
                csio_err(hw, "IRQ request failed for vec %d err:%d\n",
-                        entryp[k].vector, rv);
-               goto err;
+                        pci_irq_vector(pdev, k), rv);
+               goto out_free_irqs;
        }
 
-       entryp[k++].dev_id = (void *)hw;
+       entryp[k++].dev_id = hw;
 
-       rv = request_irq(entryp[k].vector, csio_fwevt_isr, 0,
+       rv = request_irq(pci_irq_vector(pdev, k), csio_fwevt_isr, 0,
                         entryp[k].desc, hw);
        if (rv) {
                csio_err(hw, "IRQ request failed for vec %d err:%d\n",
-                        entryp[k].vector, rv);
-               goto err;
+                        pci_irq_vector(pdev, k), rv);
+               goto out_free_irqs;
        }
 
        entryp[k++].dev_id = (void *)hw;
@@ -429,51 +427,31 @@ csio_request_irqs(struct csio_hw *hw)
                        struct csio_scsi_qset *sqset = &hw->sqset[i][j];
                        struct csio_q *q = hw->wrm.q_arr[sqset->iq_idx];
 
-                       rv = request_irq(entryp[k].vector, csio_scsi_isr, 0,
+                       rv = request_irq(pci_irq_vector(pdev, k), csio_scsi_isr, 0,
                                         entryp[k].desc, q);
                        if (rv) {
                                csio_err(hw,
                                       "IRQ request failed for vec %d err:%d\n",
-                                      entryp[k].vector, rv);
-                               goto err;
+                                      pci_irq_vector(pdev, k), rv);
+                               goto out_free_irqs;
                        }
 
-                       entryp[k].dev_id = (void *)q;
+                       entryp[k].dev_id = q;
 
                } /* for all scsi cpus */
        } /* for all ports */
 
 out:
        hw->flags |= CSIO_HWF_HOST_INTR_ENABLED;
-
        return 0;
 
-err:
-       for (i = 0; i < k; i++) {
-               entryp = &hw->msix_entries[i];
-               free_irq(entryp->vector, entryp->dev_id);
-       }
-       pci_disable_msix(hw->pdev);
-
+out_free_irqs:
+       for (i = 0; i < k; i++)
+               free_irq(pci_irq_vector(pdev, i), hw->msix_entries[i].dev_id);
+       pci_free_irq_vectors(hw->pdev);
        return -EINVAL;
 }
 
-static void
-csio_disable_msix(struct csio_hw *hw, bool free)
-{
-       int i;
-       struct csio_msix_entries *entryp;
-       int cnt = hw->num_sqsets + CSIO_EXTRA_VECS;
-
-       if (free) {
-               for (i = 0; i < cnt; i++) {
-                       entryp = &hw->msix_entries[i];
-                       free_irq(entryp->vector, entryp->dev_id);
-               }
-       }
-       pci_disable_msix(hw->pdev);
-}
-
 /* Reduce per-port max possible CPUs */
 static void
 csio_reduce_sqsets(struct csio_hw *hw, int cnt)
@@ -500,10 +478,9 @@ static int
 csio_enable_msix(struct csio_hw *hw)
 {
        int i, j, k, n, min, cnt;
-       struct csio_msix_entries *entryp;
-       struct msix_entry *entries;
        int extra = CSIO_EXTRA_VECS;
        struct csio_scsi_cpu_info *info;
+       struct irq_affinity desc = { .pre_vectors = 2 };
 
        min = hw->num_pports + extra;
        cnt = hw->num_sqsets + extra;
@@ -512,50 +489,35 @@ csio_enable_msix(struct csio_hw *hw)
        if (hw->flags & CSIO_HWF_USING_SOFT_PARAMS || !csio_is_hw_master(hw))
                cnt = min_t(uint8_t, hw->cfg_niq, cnt);
 
-       entries = kzalloc(sizeof(struct msix_entry) * cnt, GFP_KERNEL);
-       if (!entries)
-               return -ENOMEM;
-
-       for (i = 0; i < cnt; i++)
-               entries[i].entry = (uint16_t)i;
-
        csio_dbg(hw, "FW supp #niq:%d, trying %d msix's\n", hw->cfg_niq, cnt);
 
-       cnt = pci_enable_msix_range(hw->pdev, entries, min, cnt);
-       if (cnt < 0) {
-               kfree(entries);
+       cnt = pci_alloc_irq_vectors_affinity(hw->pdev, min, cnt,
+                       PCI_IRQ_MSIX | PCI_IRQ_AFFINITY, &desc);
+       if (cnt < 0)
                return cnt;
-       }
 
        if (cnt < (hw->num_sqsets + extra)) {
                csio_dbg(hw, "Reducing sqsets to %d\n", cnt - extra);
                csio_reduce_sqsets(hw, cnt - extra);
        }
 
-       /* Save off vectors */
-       for (i = 0; i < cnt; i++) {
-               entryp = &hw->msix_entries[i];
-               entryp->vector = entries[i].vector;
-       }
-
        /* Distribute vectors */
        k = 0;
-       csio_set_nondata_intr_idx(hw, entries[k].entry);
-       csio_set_mb_intr_idx(csio_hw_to_mbm(hw), entries[k++].entry);
-       csio_set_fwevt_intr_idx(hw, entries[k++].entry);
+       csio_set_nondata_intr_idx(hw, k);
+       csio_set_mb_intr_idx(csio_hw_to_mbm(hw), k++);
+       csio_set_fwevt_intr_idx(hw, k++);
 
        for (i = 0; i < hw->num_pports; i++) {
                info = &hw->scsi_cpu_info[i];
 
                for (j = 0; j < hw->num_scsi_msix_cpus; j++) {
                        n = (j % info->max_cpus) +  k;
-                       hw->sqset[i][j].intr_idx = entries[n].entry;
+                       hw->sqset[i][j].intr_idx = n;
                }
 
                k += info->max_cpus;
        }
 
-       kfree(entries);
        return 0;
 }
 
@@ -597,22 +559,26 @@ csio_intr_disable(struct csio_hw *hw, bool free)
 {
        csio_hw_intr_disable(hw);
 
-       switch (hw->intr_mode) {
-       case CSIO_IM_MSIX:
-               csio_disable_msix(hw, free);
-               break;
-       case CSIO_IM_MSI:
-               if (free)
-                       free_irq(hw->pdev->irq, hw);
-               pci_disable_msi(hw->pdev);
-               break;
-       case CSIO_IM_INTX:
-               if (free)
-                       free_irq(hw->pdev->irq, hw);
-               break;
-       default:
-               break;
+       if (free) {
+               int i;
+
+               switch (hw->intr_mode) {
+               case CSIO_IM_MSIX:
+                       for (i = 0; i < hw->num_sqsets + CSIO_EXTRA_VECS; i++) {
+                               free_irq(pci_irq_vector(hw->pdev, i),
+                                        hw->msix_entries[i].dev_id);
+                       }
+                       break;
+               case CSIO_IM_MSI:
+               case CSIO_IM_INTX:
+                       free_irq(pci_irq_vector(hw->pdev, 0), hw);
+                       break;
+               default:
+                       break;
+               }
        }
+
+       pci_free_irq_vectors(hw->pdev);
        hw->intr_mode = CSIO_IM_NONE;
        hw->flags &= ~CSIO_HWF_HOST_INTR_ENABLED;
 }