@@ -154,6 +154,7 @@ struct adf_pfvf_ops {
u32 (*get_vf2pf_sources)(void __iomem *pmisc_addr);
void (*enable_vf2pf_interrupts)(void __iomem *pmisc_addr, u32 vf_mask);
void (*disable_vf2pf_interrupts)(void __iomem *pmisc_addr, u32 vf_mask);
+ int (*send_msg)(struct adf_accel_dev *accel_dev, u32 msg, u8 vf_nr);
};
struct adf_hw_device_data {
@@ -1,9 +1,12 @@
// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
/* Copyright(c) 2021 Intel Corporation */
+#include <linux/delay.h>
+#include <linux/mutex.h>
#include <linux/types.h>
#include "adf_accel_devices.h"
#include "adf_common_drv.h"
#include "adf_gen2_pfvf.h"
+#include "adf_pf2vf_msg.h"
/* VF2PF interrupts */
#define ADF_GEN2_ERR_REG_VF2PF(vf_src) (((vf_src) & 0x01FFFE00) >> 9)
@@ -12,6 +15,12 @@
#define ADF_GEN2_PF_PF2VF_OFFSET(i) (0x3A000 + 0x280 + ((i) * 0x04))
#define ADF_GEN2_VF_PF2VF_OFFSET 0x200
+#define ADF_PFVF_MSG_ACK_DELAY 2
+#define ADF_PFVF_MSG_ACK_MAX_RETRY 100
+
+#define ADF_PFVF_MSG_RETRY_DELAY 5
+#define ADF_PFVF_MSG_MAX_RETRIES 3
+
static u32 adf_gen2_pf_get_pfvf_offset(u32 i)
{
return ADF_GEN2_PF_PF2VF_OFFSET(i);
@@ -61,6 +70,92 @@ static void adf_gen2_disable_vf2pf_interrupts(void __iomem *pmisc_addr,
}
}
+static int adf_gen2_pfvf_send(struct adf_accel_dev *accel_dev, u32 msg,
+ u8 vf_nr)
+{
+ struct adf_accel_pci *pci_info = &accel_dev->accel_pci_dev;
+ struct adf_hw_device_data *hw_data = accel_dev->hw_device;
+ void __iomem *pmisc_bar_addr =
+ pci_info->pci_bars[hw_data->get_misc_bar_id(hw_data)].virt_addr;
+ u32 val, pfvf_offset, count = 0;
+ u32 local_in_use_mask, local_in_use_pattern;
+ u32 remote_in_use_mask, remote_in_use_pattern;
+ struct mutex *lock; /* lock preventing concurrent acces of CSR */
+ unsigned int retries = ADF_PFVF_MSG_MAX_RETRIES;
+ u32 int_bit;
+ int ret;
+
+ if (accel_dev->is_vf) {
+ pfvf_offset = GET_PFVF_OPS(accel_dev)->get_vf2pf_offset(0);
+ lock = &accel_dev->vf.vf2pf_lock;
+ local_in_use_mask = ADF_VF2PF_IN_USE_BY_VF_MASK;
+ local_in_use_pattern = ADF_VF2PF_IN_USE_BY_VF;
+ remote_in_use_mask = ADF_PF2VF_IN_USE_BY_PF_MASK;
+ remote_in_use_pattern = ADF_PF2VF_IN_USE_BY_PF;
+ int_bit = ADF_VF2PF_INT;
+ } else {
+ pfvf_offset = GET_PFVF_OPS(accel_dev)->get_pf2vf_offset(vf_nr);
+ lock = &accel_dev->pf.vf_info[vf_nr].pf2vf_lock;
+ local_in_use_mask = ADF_PF2VF_IN_USE_BY_PF_MASK;
+ local_in_use_pattern = ADF_PF2VF_IN_USE_BY_PF;
+ remote_in_use_mask = ADF_VF2PF_IN_USE_BY_VF_MASK;
+ remote_in_use_pattern = ADF_VF2PF_IN_USE_BY_VF;
+ int_bit = ADF_PF2VF_INT;
+ }
+
+ msg &= ~local_in_use_mask;
+ msg |= local_in_use_pattern;
+
+ mutex_lock(lock);
+
+start:
+ ret = 0;
+
+ /* Check if the PFVF CSR is in use by remote function */
+ val = ADF_CSR_RD(pmisc_bar_addr, pfvf_offset);
+ if ((val & remote_in_use_mask) == remote_in_use_pattern) {
+ dev_dbg(&GET_DEV(accel_dev),
+ "PFVF CSR in use by remote function\n");
+ goto retry;
+ }
+
+ /* Attempt to get ownership of the PFVF CSR */
+ ADF_CSR_WR(pmisc_bar_addr, pfvf_offset, msg | int_bit);
+
+ /* Wait for confirmation from remote func it received the message */
+ do {
+ msleep(ADF_PFVF_MSG_ACK_DELAY);
+ val = ADF_CSR_RD(pmisc_bar_addr, pfvf_offset);
+ } while ((val & int_bit) && (count++ < ADF_PFVF_MSG_ACK_MAX_RETRY));
+
+ if (val & int_bit) {
+ dev_dbg(&GET_DEV(accel_dev), "ACK not received from remote\n");
+ val &= ~int_bit;
+ ret = -EIO;
+ }
+
+ if (val != msg) {
+ dev_dbg(&GET_DEV(accel_dev),
+ "Collision - PFVF CSR overwritten by remote function\n");
+ goto retry;
+ }
+
+ /* Finished with the PFVF CSR; relinquish it and leave msg in CSR */
+ ADF_CSR_WR(pmisc_bar_addr, pfvf_offset, val & ~local_in_use_mask);
+out:
+ mutex_unlock(lock);
+ return ret;
+
+retry:
+ if (--retries) {
+ msleep(ADF_PFVF_MSG_RETRY_DELAY);
+ goto start;
+ } else {
+ ret = -EBUSY;
+ goto out;
+ }
+}
+
void adf_gen2_init_pf_pfvf_ops(struct adf_pfvf_ops *pfvf_ops)
{
pfvf_ops->enable_comms = adf_enable_pf2vf_comms;
@@ -69,6 +164,7 @@ void adf_gen2_init_pf_pfvf_ops(struct adf_pfvf_ops *pfvf_ops)
pfvf_ops->get_vf2pf_sources = adf_gen2_get_vf2pf_sources;
pfvf_ops->enable_vf2pf_interrupts = adf_gen2_enable_vf2pf_interrupts;
pfvf_ops->disable_vf2pf_interrupts = adf_gen2_disable_vf2pf_interrupts;
+ pfvf_ops->send_msg = adf_gen2_pfvf_send;
}
EXPORT_SYMBOL_GPL(adf_gen2_init_pf_pfvf_ops);
@@ -77,5 +173,6 @@ void adf_gen2_init_vf_pfvf_ops(struct adf_pfvf_ops *pfvf_ops)
pfvf_ops->enable_comms = adf_enable_vf2pf_comms;
pfvf_ops->get_pf2vf_offset = adf_gen2_vf_get_pfvf_offset;
pfvf_ops->get_vf2pf_offset = adf_gen2_vf_get_pfvf_offset;
+ pfvf_ops->send_msg = adf_gen2_pfvf_send;
}
EXPORT_SYMBOL_GPL(adf_gen2_init_vf_pfvf_ops);
@@ -1,6 +1,5 @@
// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
/* Copyright(c) 2015 - 2020 Intel Corporation */
-#include <linux/delay.h>
#include "adf_accel_devices.h"
#include "adf_common_drv.h"
#include "adf_pf2vf_msg.h"
@@ -8,97 +7,10 @@
#define ADF_PFVF_MSG_COLLISION_DETECT_DELAY 10
#define ADF_PFVF_MSG_ACK_DELAY 2
#define ADF_PFVF_MSG_ACK_MAX_RETRY 100
-#define ADF_PFVF_MSG_RETRY_DELAY 5
-#define ADF_PFVF_MSG_MAX_RETRIES 3
#define ADF_PFVF_MSG_RESP_TIMEOUT (ADF_PFVF_MSG_ACK_DELAY * \
ADF_PFVF_MSG_ACK_MAX_RETRY + \
ADF_PFVF_MSG_COLLISION_DETECT_DELAY)
-static int adf_iov_putmsg(struct adf_accel_dev *accel_dev, u32 msg, u8 vf_nr)
-{
- struct adf_accel_pci *pci_info = &accel_dev->accel_pci_dev;
- struct adf_hw_device_data *hw_data = accel_dev->hw_device;
- void __iomem *pmisc_bar_addr =
- pci_info->pci_bars[hw_data->get_misc_bar_id(hw_data)].virt_addr;
- u32 val, pf2vf_offset, count = 0;
- u32 local_in_use_mask, local_in_use_pattern;
- u32 remote_in_use_mask, remote_in_use_pattern;
- struct mutex *lock; /* lock preventing concurrent acces of CSR */
- unsigned int retries = ADF_PFVF_MSG_MAX_RETRIES;
- u32 int_bit;
- int ret;
-
- if (accel_dev->is_vf) {
- pf2vf_offset = hw_data->pfvf_ops.get_vf2pf_offset(0);
- lock = &accel_dev->vf.vf2pf_lock;
- local_in_use_mask = ADF_VF2PF_IN_USE_BY_VF_MASK;
- local_in_use_pattern = ADF_VF2PF_IN_USE_BY_VF;
- remote_in_use_mask = ADF_PF2VF_IN_USE_BY_PF_MASK;
- remote_in_use_pattern = ADF_PF2VF_IN_USE_BY_PF;
- int_bit = ADF_VF2PF_INT;
- } else {
- pf2vf_offset = hw_data->pfvf_ops.get_pf2vf_offset(vf_nr);
- lock = &accel_dev->pf.vf_info[vf_nr].pf2vf_lock;
- local_in_use_mask = ADF_PF2VF_IN_USE_BY_PF_MASK;
- local_in_use_pattern = ADF_PF2VF_IN_USE_BY_PF;
- remote_in_use_mask = ADF_VF2PF_IN_USE_BY_VF_MASK;
- remote_in_use_pattern = ADF_VF2PF_IN_USE_BY_VF;
- int_bit = ADF_PF2VF_INT;
- }
-
- msg &= ~local_in_use_mask;
- msg |= local_in_use_pattern;
-
- mutex_lock(lock);
-
-start:
- ret = 0;
-
- /* Check if the PFVF CSR is in use by remote function */
- val = ADF_CSR_RD(pmisc_bar_addr, pf2vf_offset);
- if ((val & remote_in_use_mask) == remote_in_use_pattern) {
- dev_dbg(&GET_DEV(accel_dev),
- "PFVF CSR in use by remote function\n");
- goto retry;
- }
-
- /* Attempt to get ownership of the PFVF CSR */
- ADF_CSR_WR(pmisc_bar_addr, pf2vf_offset, msg | int_bit);
-
- /* Wait for confirmation from remote func it received the message */
- do {
- msleep(ADF_PFVF_MSG_ACK_DELAY);
- val = ADF_CSR_RD(pmisc_bar_addr, pf2vf_offset);
- } while ((val & int_bit) && (count++ < ADF_PFVF_MSG_ACK_MAX_RETRY));
-
- if (val & int_bit) {
- dev_dbg(&GET_DEV(accel_dev), "ACK not received from remote\n");
- val &= ~int_bit;
- ret = -EIO;
- }
-
- if (val != msg) {
- dev_dbg(&GET_DEV(accel_dev),
- "Collision - PFVF CSR overwritten by remote function\n");
- goto retry;
- }
-
- /* Finished with the PFVF CSR; relinquish it and leave msg in CSR */
- ADF_CSR_WR(pmisc_bar_addr, pf2vf_offset, val & ~local_in_use_mask);
-out:
- mutex_unlock(lock);
- return ret;
-
-retry:
- if (--retries) {
- msleep(ADF_PFVF_MSG_RETRY_DELAY);
- goto start;
- } else {
- ret = -EBUSY;
- goto out;
- }
-}
-
/**
* adf_send_pf2vf_msg() - send PF to VF message
* @accel_dev: Pointer to acceleration device
@@ -111,7 +23,7 @@ static int adf_iov_putmsg(struct adf_accel_dev *accel_dev, u32 msg, u8 vf_nr)
*/
static int adf_send_pf2vf_msg(struct adf_accel_dev *accel_dev, u8 vf_nr, u32 msg)
{
- return adf_iov_putmsg(accel_dev, msg, vf_nr);
+ return GET_PFVF_OPS(accel_dev)->send_msg(accel_dev, msg, vf_nr);
}
/**
@@ -125,7 +37,7 @@ static int adf_send_pf2vf_msg(struct adf_accel_dev *accel_dev, u8 vf_nr, u32 msg
*/
int adf_send_vf2pf_msg(struct adf_accel_dev *accel_dev, u32 msg)
{
- return adf_iov_putmsg(accel_dev, msg, 0);
+ return GET_PFVF_OPS(accel_dev)->send_msg(accel_dev, msg, 0);
}
/**
@@ -49,7 +49,8 @@
*
* When a PF or VF attempts to send a message in the lower or upper 16 bits,
* respectively, the other 16 bits are written to first with a defined
- * IN_USE_BY pattern as part of a collision control scheme (see adf_iov_putmsg).
+ * IN_USE_BY pattern as part of a collision control scheme (see function
+ * adf_gen2_pfvf_send() in adf_pf2vf_msg.c).
*/
#define ADF_PFVF_COMPAT_THIS_VERSION 0x1 /* PF<->VF compat */