[dpdk-dev] [PATCH] common/cnxk: fix device MSIX greater than default value

[Harman Kalra]

Handling the case where number of MSIX interrupts are greater
than default value i.e. PLT_MAX_RXTX_INTR_VEC_ID. On PCI probe
device is queried for supported MSIX interrupts, and respective
interrupt resources are reallocated with this value. Same MSIX
count should be used while registering new interrupt vectors.

Fixes: d61138d4f0e2 ("drivers: remove direct access to interrupt handle")

Signed-off-by: Harman Kalra <hka...@marvell.com>
---
 drivers/common/cnxk/roc_irq.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/common/cnxk/roc_irq.c b/drivers/common/cnxk/roc_irq.c
index 3b34467b96..7a24297d72 100644
--- a/drivers/common/cnxk/roc_irq.c
+++ b/drivers/common/cnxk/roc_irq.c
@@ -14,7 +14,8 @@
 #include <unistd.h>
 
 #define MSIX_IRQ_SET_BUF_LEN                                                   
\
-       (sizeof(struct vfio_irq_set) + sizeof(int) * (PLT_MAX_RXTX_INTR_VEC_ID))
+       (sizeof(struct vfio_irq_set) + sizeof(int) *                           \
+                       (plt_intr_max_intr_get(intr_handle)))
 
 static int
 irq_get_info(struct plt_intr_handle *intr_handle)
@@ -34,7 +35,7 @@ irq_get_info(struct plt_intr_handle *intr_handle)
        plt_base_dbg("Flags=0x%x index=0x%x count=0x%x max_intr_vec_id=0x%x",
                     irq.flags, irq.index, irq.count, PLT_MAX_RXTX_INTR_VEC_ID);
 
-       if (irq.count > PLT_MAX_RXTX_INTR_VEC_ID) {
+       if (irq.count == 0) {
                plt_err("HW max=%d > PLT_MAX_RXTX_INTR_VEC_ID: %d", irq.count,
                        PLT_MAX_RXTX_INTR_VEC_ID);
                plt_intr_max_intr_set(intr_handle, PLT_MAX_RXTX_INTR_VEC_ID);
@@ -92,14 +93,6 @@ irq_init(struct plt_intr_handle *intr_handle)
        int32_t *fd_ptr;
        uint32_t i;
 
-       if (plt_intr_max_intr_get(intr_handle) >
-                                               PLT_MAX_RXTX_INTR_VEC_ID) {
-               plt_err("Max_intr=%d greater than PLT_MAX_RXTX_INTR_VEC_ID=%d",
-                       plt_intr_max_intr_get(intr_handle),
-                       PLT_MAX_RXTX_INTR_VEC_ID);
-               return -ERANGE;
-       }
-
        len = sizeof(struct vfio_irq_set) +
              sizeof(int32_t) * plt_intr_max_intr_get(intr_handle);
 
-- 
2.18.0