}
EXPORT_SYMBOL(otx2_mbox_busy_poll_for_rsp);
-void otx2_mbox_msg_send(struct otx2_mbox *mbox, int devid)
+static void otx2_mbox_msg_send_data(struct otx2_mbox *mbox, int devid, u64 data)
{
struct otx2_mbox_dev *mdev = &mbox->dev[devid];
struct mbox_hdr *tx_hdr, *rx_hdr;
void *hw_mbase = mdev->hwbase;
+ u64 intr_val;
tx_hdr = hw_mbase + mbox->tx_start;
rx_hdr = hw_mbase + mbox->rx_start;
spin_unlock(&mdev->mbox_lock);
+ /* Check if interrupt pending */
+ intr_val = readq((void __iomem *)mbox->reg_base +
+ (mbox->trigger | (devid << mbox->tr_shift)));
+
+ intr_val |= data;
/* The interrupt should be fired after num_msgs is written
* to the shared memory
*/
- writeq(1, (void __iomem *)mbox->reg_base +
+ writeq(intr_val, (void __iomem *)mbox->reg_base +
(mbox->trigger | (devid << mbox->tr_shift)));
}
+
+void otx2_mbox_msg_send(struct otx2_mbox *mbox, int devid)
+{
+ otx2_mbox_msg_send_data(mbox, devid, MBOX_DOWN_MSG);
+}
EXPORT_SYMBOL(otx2_mbox_msg_send);
+void otx2_mbox_msg_send_up(struct otx2_mbox *mbox, int devid)
+{
+ otx2_mbox_msg_send_data(mbox, devid, MBOX_UP_MSG);
+}
+EXPORT_SYMBOL(otx2_mbox_msg_send_up);
+
+bool otx2_mbox_wait_for_zero(struct otx2_mbox *mbox, int devid)
+{
+ u64 data;
+
+ data = readq((void __iomem *)mbox->reg_base +
+ (mbox->trigger | (devid << mbox->tr_shift)));
+
+ /* If data is non-zero wait for ~1ms and return to caller
+ * whether data has changed to zero or not after the wait.
+ */
+ if (!data)
+ return true;
+
+ usleep_range(950, 1000);
+
+ data = readq((void __iomem *)mbox->reg_base +
+ (mbox->trigger | (devid << mbox->tr_shift)));
+
+ return data == 0;
+}
+EXPORT_SYMBOL(otx2_mbox_wait_for_zero);
+
struct mbox_msghdr *otx2_mbox_alloc_msg_rsp(struct otx2_mbox *mbox, int devid,
int size, int size_rsp)
{
#define MBOX_SIZE SZ_64K
+#define MBOX_DOWN_MSG 1
+#define MBOX_UP_MSG 2
+
/* AF/PF: PF initiated, PF/VF VF initiated */
#define MBOX_DOWN_RX_START 0
#define MBOX_DOWN_RX_SIZE (46 * SZ_1K)
struct pci_dev *pdev, void __force *reg_base,
int direction, int ndevs, unsigned long *bmap);
void otx2_mbox_msg_send(struct otx2_mbox *mbox, int devid);
+void otx2_mbox_msg_send_up(struct otx2_mbox *mbox, int devid);
int otx2_mbox_wait_for_rsp(struct otx2_mbox *mbox, int devid);
int otx2_mbox_busy_poll_for_rsp(struct otx2_mbox *mbox, int devid);
struct mbox_msghdr *otx2_mbox_alloc_msg_rsp(struct otx2_mbox *mbox, int devid,
return otx2_mbox_alloc_msg_rsp(mbox, devid, size, 0);
}
+bool otx2_mbox_wait_for_zero(struct otx2_mbox *mbox, int devid);
+
/* Mailbox message types */
#define MBOX_MSG_MASK 0xFFFF
#define MBOX_MSG_INVALID 0xFFFE
static int mcs_notify_pfvf(struct mcs_intr_event *event, struct rvu *rvu)
{
struct mcs_intr_info *req;
- int err, pf;
+ int pf;
pf = rvu_get_pf(event->pcifunc);
+ mutex_lock(&rvu->mbox_lock);
+
req = otx2_mbox_alloc_msg_mcs_intr_notify(rvu, pf);
- if (!req)
+ if (!req) {
+ mutex_unlock(&rvu->mbox_lock);
return -ENOMEM;
+ }
req->mcs_id = event->mcs_id;
req->intr_mask = event->intr_mask;
req->hdr.pcifunc = event->pcifunc;
req->lmac_id = event->lmac_id;
- otx2_mbox_msg_send(&rvu->afpf_wq_info.mbox_up, pf);
- err = otx2_mbox_wait_for_rsp(&rvu->afpf_wq_info.mbox_up, pf);
- if (err)
- dev_warn(rvu->dev, "MCS notification to pf %d failed\n", pf);
+ otx2_mbox_wait_for_zero(&rvu->afpf_wq_info.mbox_up, pf);
+
+ otx2_mbox_msg_send_up(&rvu->afpf_wq_info.mbox_up, pf);
+
+ mutex_unlock(&rvu->mbox_lock);
return 0;
}
}
}
-static void __rvu_mbox_handler(struct rvu_work *mwork, int type)
+static void __rvu_mbox_handler(struct rvu_work *mwork, int type, bool poll)
{
struct rvu *rvu = mwork->rvu;
int offset, err, id, devid;
}
mw->mbox_wrk[devid].num_msgs = 0;
+ if (poll)
+ otx2_mbox_wait_for_zero(mbox, devid);
+
/* Send mbox responses to VF/PF */
otx2_mbox_msg_send(mbox, devid);
}
static inline void rvu_afpf_mbox_handler(struct work_struct *work)
{
struct rvu_work *mwork = container_of(work, struct rvu_work, work);
+ struct rvu *rvu = mwork->rvu;
- __rvu_mbox_handler(mwork, TYPE_AFPF);
+ mutex_lock(&rvu->mbox_lock);
+ __rvu_mbox_handler(mwork, TYPE_AFPF, true);
+ mutex_unlock(&rvu->mbox_lock);
}
static inline void rvu_afvf_mbox_handler(struct work_struct *work)
{
struct rvu_work *mwork = container_of(work, struct rvu_work, work);
- __rvu_mbox_handler(mwork, TYPE_AFVF);
+ __rvu_mbox_handler(mwork, TYPE_AFVF, false);
}
static void __rvu_mbox_up_handler(struct rvu_work *mwork, int type)
}
}
+ mutex_init(&rvu->mbox_lock);
+
mbox_regions = kcalloc(num, sizeof(void *), GFP_KERNEL);
if (!mbox_regions) {
err = -ENOMEM;
spinlock_t mcs_intrq_lock;
/* CPT interrupt lock */
spinlock_t cpt_intr_lock;
+
+ struct mutex mbox_lock; /* Serialize mbox up and down msgs */
};
static inline void rvu_write64(struct rvu *rvu, u64 block, u64 offset, u64 val)
struct cgx_link_user_info *linfo;
struct cgx_link_info_msg *msg;
unsigned long pfmap;
- int err, pfid;
+ int pfid;
linfo = &event->link_uinfo;
pfmap = cgxlmac_to_pfmap(rvu, event->cgx_id, event->lmac_id);
continue;
}
+ mutex_lock(&rvu->mbox_lock);
+
/* Send mbox message to PF */
msg = otx2_mbox_alloc_msg_cgx_link_event(rvu, pfid);
- if (!msg)
+ if (!msg) {
+ mutex_unlock(&rvu->mbox_lock);
continue;
+ }
+
msg->link_info = *linfo;
- otx2_mbox_msg_send(&rvu->afpf_wq_info.mbox_up, pfid);
- err = otx2_mbox_wait_for_rsp(&rvu->afpf_wq_info.mbox_up, pfid);
- if (err)
- dev_warn(rvu->dev, "notification to pf %d failed\n",
- pfid);
+
+ otx2_mbox_wait_for_zero(&rvu->afpf_wq_info.mbox_up, pfid);
+
+ otx2_mbox_msg_send_up(&rvu->afpf_wq_info.mbox_up, pfid);
+
+ mutex_unlock(&rvu->mbox_lock);
} while (pfmap);
}
if (!otx2_mbox_nonempty(&mbox->mbox_up, devid))
return 0;
- otx2_mbox_msg_send(&mbox->mbox_up, devid);
+ otx2_mbox_msg_send_up(&mbox->mbox_up, devid);
err = otx2_mbox_wait_for_rsp(&mbox->mbox_up, devid);
if (err)
return err;
return 0;
}
-static void otx2_queue_work(struct mbox *mw, struct workqueue_struct *mbox_wq,
- int first, int mdevs, u64 intr, int type)
+static void otx2_queue_vf_work(struct mbox *mw, struct workqueue_struct *mbox_wq,
+ int first, int mdevs, u64 intr)
{
struct otx2_mbox_dev *mdev;
struct otx2_mbox *mbox;
mbox = &mw->mbox;
mdev = &mbox->dev[i];
- if (type == TYPE_PFAF)
- otx2_sync_mbox_bbuf(mbox, i);
hdr = mdev->mbase + mbox->rx_start;
/* The hdr->num_msgs is set to zero immediately in the interrupt
- * handler to ensure that it holds a correct value next time
- * when the interrupt handler is called.
- * pf->mbox.num_msgs holds the data for use in pfaf_mbox_handler
- * pf>mbox.up_num_msgs holds the data for use in
- * pfaf_mbox_up_handler.
+ * handler to ensure that it holds a correct value next time
+ * when the interrupt handler is called. pf->mw[i].num_msgs
+ * holds the data for use in otx2_pfvf_mbox_handler and
+ * pf->mw[i].up_num_msgs holds the data for use in
+ * otx2_pfvf_mbox_up_handler.
*/
if (hdr->num_msgs) {
mw[i].num_msgs = hdr->num_msgs;
hdr->num_msgs = 0;
- if (type == TYPE_PFAF)
- memset(mbox->hwbase + mbox->rx_start, 0,
- ALIGN(sizeof(struct mbox_hdr),
- sizeof(u64)));
-
queue_work(mbox_wq, &mw[i].mbox_wrk);
}
mbox = &mw->mbox_up;
mdev = &mbox->dev[i];
- if (type == TYPE_PFAF)
- otx2_sync_mbox_bbuf(mbox, i);
hdr = mdev->mbase + mbox->rx_start;
if (hdr->num_msgs) {
mw[i].up_num_msgs = hdr->num_msgs;
hdr->num_msgs = 0;
- if (type == TYPE_PFAF)
- memset(mbox->hwbase + mbox->rx_start, 0,
- ALIGN(sizeof(struct mbox_hdr),
- sizeof(u64)));
-
queue_work(mbox_wq, &mw[i].mbox_up_wrk);
}
}
/* Msgs are already copied, trigger VF's mbox irq */
smp_wmb();
+ otx2_mbox_wait_for_zero(pfvf_mbox, devid);
+
offset = pfvf_mbox->trigger | (devid << pfvf_mbox->tr_shift);
- writeq(1, (void __iomem *)pfvf_mbox->reg_base + offset);
+ writeq(MBOX_DOWN_MSG, (void __iomem *)pfvf_mbox->reg_base + offset);
/* Restore VF's mbox bounce buffer region address */
src_mdev->mbase = bbuf_base;
end:
offset = mbox->rx_start + msg->next_msgoff;
if (mdev->msgs_acked == (vf_mbox->up_num_msgs - 1))
- __otx2_mbox_reset(mbox, 0);
+ __otx2_mbox_reset(mbox, vf_idx);
mdev->msgs_acked++;
}
}
if (vfs > 64) {
intr = otx2_read64(pf, RVU_PF_VFPF_MBOX_INTX(1));
otx2_write64(pf, RVU_PF_VFPF_MBOX_INTX(1), intr);
- otx2_queue_work(mbox, pf->mbox_pfvf_wq, 64, vfs, intr,
- TYPE_PFVF);
+ otx2_queue_vf_work(mbox, pf->mbox_pfvf_wq, 64, vfs, intr);
if (intr)
trace_otx2_msg_interrupt(mbox->mbox.pdev, "VF(s) to PF", intr);
vfs = 64;
intr = otx2_read64(pf, RVU_PF_VFPF_MBOX_INTX(0));
otx2_write64(pf, RVU_PF_VFPF_MBOX_INTX(0), intr);
- otx2_queue_work(mbox, pf->mbox_pfvf_wq, 0, vfs, intr, TYPE_PFVF);
+ otx2_queue_vf_work(mbox, pf->mbox_pfvf_wq, 0, vfs, intr);
if (intr)
trace_otx2_msg_interrupt(mbox->mbox.pdev, "VF(s) to PF", intr);
struct mbox *af_mbox;
struct otx2_nic *pf;
int offset, id;
+ u16 num_msgs;
af_mbox = container_of(work, struct mbox, mbox_wrk);
mbox = &af_mbox->mbox;
mdev = &mbox->dev[0];
rsp_hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
+ num_msgs = rsp_hdr->num_msgs;
offset = mbox->rx_start + ALIGN(sizeof(*rsp_hdr), MBOX_MSG_ALIGN);
pf = af_mbox->pfvf;
- for (id = 0; id < af_mbox->num_msgs; id++) {
+ for (id = 0; id < num_msgs; id++) {
msg = (struct mbox_msghdr *)(mdev->mbase + offset);
otx2_process_pfaf_mbox_msg(pf, msg);
offset = mbox->rx_start + msg->next_msgoff;
- if (mdev->msgs_acked == (af_mbox->num_msgs - 1))
+ if (mdev->msgs_acked == (num_msgs - 1))
__otx2_mbox_reset(mbox, 0);
mdev->msgs_acked++;
}
int offset, id, devid = 0;
struct mbox_hdr *rsp_hdr;
struct mbox_msghdr *msg;
+ u16 num_msgs;
rsp_hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
+ num_msgs = rsp_hdr->num_msgs;
offset = mbox->rx_start + ALIGN(sizeof(*rsp_hdr), MBOX_MSG_ALIGN);
- for (id = 0; id < af_mbox->up_num_msgs; id++) {
+ for (id = 0; id < num_msgs; id++) {
msg = (struct mbox_msghdr *)(mdev->mbase + offset);
devid = msg->pcifunc & RVU_PFVF_FUNC_MASK;
otx2_process_mbox_msg_up(pf, msg);
offset = mbox->rx_start + msg->next_msgoff;
}
- if (devid) {
+ /* Forward to VF iff VFs are really present */
+ if (devid && pci_num_vf(pf->pdev)) {
otx2_forward_vf_mbox_msgs(pf, &pf->mbox.mbox_up,
MBOX_DIR_PFVF_UP, devid - 1,
- af_mbox->up_num_msgs);
+ num_msgs);
return;
}
static irqreturn_t otx2_pfaf_mbox_intr_handler(int irq, void *pf_irq)
{
struct otx2_nic *pf = (struct otx2_nic *)pf_irq;
- struct mbox *mbox;
+ struct mbox *mw = &pf->mbox;
+ struct otx2_mbox_dev *mdev;
+ struct otx2_mbox *mbox;
+ struct mbox_hdr *hdr;
+ u64 mbox_data;
/* Clear the IRQ */
otx2_write64(pf, RVU_PF_INT, BIT_ULL(0));
- mbox = &pf->mbox;
- trace_otx2_msg_interrupt(mbox->mbox.pdev, "AF to PF", BIT_ULL(0));
+ mbox_data = otx2_read64(pf, RVU_PF_PFAF_MBOX0);
+
+ if (mbox_data & MBOX_UP_MSG) {
+ mbox_data &= ~MBOX_UP_MSG;
+ otx2_write64(pf, RVU_PF_PFAF_MBOX0, mbox_data);
+
+ mbox = &mw->mbox_up;
+ mdev = &mbox->dev[0];
+ otx2_sync_mbox_bbuf(mbox, 0);
+
+ hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
+ if (hdr->num_msgs)
+ queue_work(pf->mbox_wq, &mw->mbox_up_wrk);
+
+ trace_otx2_msg_interrupt(pf->pdev, "UP message from AF to PF",
+ BIT_ULL(0));
+ }
+
+ if (mbox_data & MBOX_DOWN_MSG) {
+ mbox_data &= ~MBOX_DOWN_MSG;
+ otx2_write64(pf, RVU_PF_PFAF_MBOX0, mbox_data);
+
+ mbox = &mw->mbox;
+ mdev = &mbox->dev[0];
+ otx2_sync_mbox_bbuf(mbox, 0);
+
+ hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
+ if (hdr->num_msgs)
+ queue_work(pf->mbox_wq, &mw->mbox_wrk);
- otx2_queue_work(mbox, pf->mbox_wq, 0, 1, 1, TYPE_PFAF);
+ trace_otx2_msg_interrupt(pf->pdev, "DOWN reply from AF to PF",
+ BIT_ULL(0));
+ }
return IRQ_HANDLED;
}
struct otx2_vf_config *config;
struct cgx_link_info_msg *req;
struct mbox_msghdr *msghdr;
+ struct delayed_work *dwork;
struct otx2_nic *pf;
int vf_idx;
vf_idx = config - config->pf->vf_configs;
pf = config->pf;
+ mutex_lock(&pf->mbox.lock);
+
+ dwork = &config->link_event_work;
+
+ if (!otx2_mbox_wait_for_zero(&pf->mbox_pfvf[0].mbox_up, vf_idx)) {
+ schedule_delayed_work(dwork, msecs_to_jiffies(100));
+ mutex_unlock(&pf->mbox.lock);
+ return;
+ }
+
msghdr = otx2_mbox_alloc_msg_rsp(&pf->mbox_pfvf[0].mbox_up, vf_idx,
sizeof(*req), sizeof(struct msg_rsp));
if (!msghdr) {
dev_err(pf->dev, "Failed to create VF%d link event\n", vf_idx);
+ mutex_unlock(&pf->mbox.lock);
return;
}
req->hdr.sig = OTX2_MBOX_REQ_SIG;
memcpy(&req->link_info, &pf->linfo, sizeof(req->link_info));
- otx2_sync_mbox_up_msg(&pf->mbox_pfvf[0], vf_idx);
+ otx2_mbox_wait_for_zero(&pf->mbox_pfvf[0].mbox_up, vf_idx);
+
+ otx2_mbox_msg_send_up(&pf->mbox_pfvf[0].mbox_up, vf_idx);
+
+ mutex_unlock(&pf->mbox.lock);
}
static int otx2_sriov_enable(struct pci_dev *pdev, int numvfs)
struct otx2_mbox *mbox;
struct mbox *af_mbox;
int offset, id;
+ u16 num_msgs;
af_mbox = container_of(work, struct mbox, mbox_wrk);
mbox = &af_mbox->mbox;
mdev = &mbox->dev[0];
rsp_hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
- if (af_mbox->num_msgs == 0)
+ num_msgs = rsp_hdr->num_msgs;
+
+ if (num_msgs == 0)
return;
+
offset = mbox->rx_start + ALIGN(sizeof(*rsp_hdr), MBOX_MSG_ALIGN);
- for (id = 0; id < af_mbox->num_msgs; id++) {
+ for (id = 0; id < num_msgs; id++) {
msg = (struct mbox_msghdr *)(mdev->mbase + offset);
otx2vf_process_vfaf_mbox_msg(af_mbox->pfvf, msg);
offset = mbox->rx_start + msg->next_msgoff;
struct mbox *vf_mbox;
struct otx2_nic *vf;
int offset, id;
+ u16 num_msgs;
vf_mbox = container_of(work, struct mbox, mbox_up_wrk);
vf = vf_mbox->pfvf;
mdev = &mbox->dev[0];
rsp_hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
- if (vf_mbox->up_num_msgs == 0)
+ num_msgs = rsp_hdr->num_msgs;
+
+ if (num_msgs == 0)
return;
offset = mbox->rx_start + ALIGN(sizeof(*rsp_hdr), MBOX_MSG_ALIGN);
- for (id = 0; id < vf_mbox->up_num_msgs; id++) {
+ for (id = 0; id < num_msgs; id++) {
msg = (struct mbox_msghdr *)(mdev->mbase + offset);
otx2vf_process_mbox_msg_up(vf, msg);
offset = mbox->rx_start + msg->next_msgoff;
struct otx2_mbox_dev *mdev;
struct otx2_mbox *mbox;
struct mbox_hdr *hdr;
+ u64 mbox_data;
/* Clear the IRQ */
otx2_write64(vf, RVU_VF_INT, BIT_ULL(0));
+ mbox_data = otx2_read64(vf, RVU_VF_VFPF_MBOX0);
+
/* Read latest mbox data */
smp_rmb();
- /* Check for PF => VF response messages */
- mbox = &vf->mbox.mbox;
- mdev = &mbox->dev[0];
- otx2_sync_mbox_bbuf(mbox, 0);
+ if (mbox_data & MBOX_DOWN_MSG) {
+ mbox_data &= ~MBOX_DOWN_MSG;
+ otx2_write64(vf, RVU_VF_VFPF_MBOX0, mbox_data);
+
+ /* Check for PF => VF response messages */
+ mbox = &vf->mbox.mbox;
+ mdev = &mbox->dev[0];
+ otx2_sync_mbox_bbuf(mbox, 0);
- trace_otx2_msg_interrupt(mbox->pdev, "PF to VF", BIT_ULL(0));
+ hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
+ if (hdr->num_msgs)
+ queue_work(vf->mbox_wq, &vf->mbox.mbox_wrk);
- hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
- if (hdr->num_msgs) {
- vf->mbox.num_msgs = hdr->num_msgs;
- hdr->num_msgs = 0;
- memset(mbox->hwbase + mbox->rx_start, 0,
- ALIGN(sizeof(struct mbox_hdr), sizeof(u64)));
- queue_work(vf->mbox_wq, &vf->mbox.mbox_wrk);
+ trace_otx2_msg_interrupt(mbox->pdev, "DOWN reply from PF to VF",
+ BIT_ULL(0));
}
- /* Check for PF => VF notification messages */
- mbox = &vf->mbox.mbox_up;
- mdev = &mbox->dev[0];
- otx2_sync_mbox_bbuf(mbox, 0);
-
- hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
- if (hdr->num_msgs) {
- vf->mbox.up_num_msgs = hdr->num_msgs;
- hdr->num_msgs = 0;
- memset(mbox->hwbase + mbox->rx_start, 0,
- ALIGN(sizeof(struct mbox_hdr), sizeof(u64)));
- queue_work(vf->mbox_wq, &vf->mbox.mbox_up_wrk);
+
+ if (mbox_data & MBOX_UP_MSG) {
+ mbox_data &= ~MBOX_UP_MSG;
+ otx2_write64(vf, RVU_VF_VFPF_MBOX0, mbox_data);
+
+ /* Check for PF => VF notification messages */
+ mbox = &vf->mbox.mbox_up;
+ mdev = &mbox->dev[0];
+ otx2_sync_mbox_bbuf(mbox, 0);
+
+ hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
+ if (hdr->num_msgs)
+ queue_work(vf->mbox_wq, &vf->mbox.mbox_up_wrk);
+
+ trace_otx2_msg_interrupt(mbox->pdev, "UP message from PF to VF",
+ BIT_ULL(0));
}
return IRQ_HANDLED;
projects / linux-stable / commitdiff