[PATCH AUTOSEL 5.4 43/58] s390/qdio: fill SL with absolute addresses

Sasha Levin
2020-03-03T02:56:55Z

From: Julian Wiedmann <jwi@linux.ibm.com>

[ Upstream commit e9091ffd6a0aaced111b5d6ead5eaab5cd7101bc ]

As the comment says, sl->sbal holds an absolute address. qeth currently
solves this through wild casting, while zfcp doesn't care.

Handle this properly in the code that actually builds the SL.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Reviewed-by: Steffen Maier <maier@linux.ibm.com> [for qdio]
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/s390/include/asm/qdio.h | 2 +-
drivers/s390/cio/qdio_setup.c | 3 ++-
drivers/s390/net/qeth_core_main.c | 23 +++++++++++------------
3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h
index e3f238e8c6116..4f35b1055f30a 100644
--- a/arch/s390/include/asm/qdio.h
+++ b/arch/s390/include/asm/qdio.h
@@ -227,7 +227,7 @@ struct qdio_buffer {
* @sbal: absolute SBAL address
*/
struct sl_element {
- unsigned long sbal;
+ u64 sbal;
} __attribute__ ((packed));

/**
diff --git a/drivers/s390/cio/qdio_setup.c b/drivers/s390/cio/qdio_setup.c
index cd164886132fd..ee0b3c5862110 100644
--- a/drivers/s390/cio/qdio_setup.c
+++ b/drivers/s390/cio/qdio_setup.c
@@ -8,6 +8,7 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/export.h>
+#include <linux/io.h>
#include <asm/qdio.h>

#include "cio.h"
@@ -207,7 +208,7 @@ static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,

/* fill in sl */
for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
- q->sl->element[j].sbal = (unsigned long)q->sbal[j];
+ q->sl->element[j].sbal = virt_to_phys(q->sbal[j]);
}

static void setup_queues(struct qdio_irq *irq_ptr,
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 23852888eb2ca..b727d1e34523e 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -4716,10 +4716,10 @@ static void qeth_qdio_establish_cq(struct qeth_card *card,
if (card->options.cq == QETH_CQ_ENABLED) {
int offset = QDIO_MAX_BUFFERS_PER_Q *
(card->qdio.no_in_queues - 1);
- for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
- in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
- virt_to_phys(card->qdio.c_q->bufs[i].buffer);
- }
+
+ for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++)
+ in_sbal_ptrs[offset + i] =
+ card->qdio.c_q->bufs[i].buffer;

queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
}
@@ -4753,10 +4753,9 @@ static int qeth_qdio_establish(struct qeth_card *card)
rc = -ENOMEM;
goto out_free_qib_param;
}
- for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
- in_sbal_ptrs[i] = (struct qdio_buffer *)
- virt_to_phys(card->qdio.in_q->bufs[i].buffer);
- }
+
+ for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++)
+ in_sbal_ptrs[i] = card->qdio.in_q->bufs[i].buffer;

queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
GFP_KERNEL);
@@ -4777,11 +4776,11 @@ static int qeth_qdio_establish(struct qeth_card *card)
rc = -ENOMEM;
goto out_free_queue_start_poll;
}
+
for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
- for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
- out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
- card->qdio.out_qs[i]->bufs[j]->buffer);
- }
+ for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++, k++)
+ out_sbal_ptrs[k] =
+ card->qdio.out_qs[i]->bufs[j]->buffer;

memset(&init_data, 0, sizeof(struct qdio_initialize));
init_data.cdev = CARD_DDEV(card);
--
2.20.1