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Subject[PATCH v3 2/7] octeon_ep: add hardware configuration APIs
Date
Implement hardware resource init and shutdown helper APIs.
This includes hardware Tx/Rx queue init/enable/disable/reset,
non queue interrupt handler that decodes non-queue interrupt type.

Signed-off-by: Veerasenareddy Burru <vburru@marvell.com>
Signed-off-by: Abhijit Ayarekar <aayarekar@marvell.com>
Signed-off-by: Satananda Burla <sburla@marvell.com>
---
V2 -> V3: no change.

V1 -> V2:
- created by dividing PATCH 1/4 of original patch series.

.../marvell/octeon_ep/octep_cn9k_pf.c | 498 +++++++++++++++++-
1 file changed, 497 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_cn9k_pf.c b/drivers/net/ethernet/marvell/octeon_ep/octep_cn9k_pf.c
index a38b52788619..8b0d21b92053 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_cn9k_pf.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_cn9k_pf.c
@@ -33,19 +33,164 @@ static char *cn93_non_ioq_msix_names[] = {
"epf_rsvd",
};

+/* Dump useful hardware CSRs for debug purpose */
+static void cn93_dump_regs(struct octep_device *oct, int qno)
+{
+ struct device *dev = &oct->pdev->dev;
+
+ dev_info(dev, "IQ-%d register dump\n", qno);
+ dev_info(dev, "R[%d]_IN_INSTR_DBELL[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_IN_INSTR_DBELL(qno),
+ octep_read_csr64(oct, CN93_SDP_R_IN_INSTR_DBELL(qno)));
+ dev_info(dev, "R[%d]_IN_CONTROL[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_IN_CONTROL(qno),
+ octep_read_csr64(oct, CN93_SDP_R_IN_CONTROL(qno)));
+ dev_info(dev, "R[%d]_IN_ENABLE[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_IN_ENABLE(qno),
+ octep_read_csr64(oct, CN93_SDP_R_IN_ENABLE(qno)));
+ dev_info(dev, "R[%d]_IN_INSTR_BADDR[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_IN_INSTR_BADDR(qno),
+ octep_read_csr64(oct, CN93_SDP_R_IN_INSTR_BADDR(qno)));
+ dev_info(dev, "R[%d]_IN_INSTR_RSIZE[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_IN_INSTR_RSIZE(qno),
+ octep_read_csr64(oct, CN93_SDP_R_IN_INSTR_RSIZE(qno)));
+ dev_info(dev, "R[%d]_IN_CNTS[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_IN_CNTS(qno),
+ octep_read_csr64(oct, CN93_SDP_R_IN_CNTS(qno)));
+ dev_info(dev, "R[%d]_IN_INT_LEVELS[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_IN_INT_LEVELS(qno),
+ octep_read_csr64(oct, CN93_SDP_R_IN_INT_LEVELS(qno)));
+ dev_info(dev, "R[%d]_IN_PKT_CNT[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_IN_PKT_CNT(qno),
+ octep_read_csr64(oct, CN93_SDP_R_IN_PKT_CNT(qno)));
+ dev_info(dev, "R[%d]_IN_BYTE_CNT[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_IN_BYTE_CNT(qno),
+ octep_read_csr64(oct, CN93_SDP_R_IN_BYTE_CNT(qno)));
+
+ dev_info(dev, "OQ-%d register dump\n", qno);
+ dev_info(dev, "R[%d]_OUT_SLIST_DBELL[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_OUT_SLIST_DBELL(qno),
+ octep_read_csr64(oct, CN93_SDP_R_OUT_SLIST_DBELL(qno)));
+ dev_info(dev, "R[%d]_OUT_CONTROL[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_OUT_CONTROL(qno),
+ octep_read_csr64(oct, CN93_SDP_R_OUT_CONTROL(qno)));
+ dev_info(dev, "R[%d]_OUT_ENABLE[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_OUT_ENABLE(qno),
+ octep_read_csr64(oct, CN93_SDP_R_OUT_ENABLE(qno)));
+ dev_info(dev, "R[%d]_OUT_SLIST_BADDR[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_OUT_SLIST_BADDR(qno),
+ octep_read_csr64(oct, CN93_SDP_R_OUT_SLIST_BADDR(qno)));
+ dev_info(dev, "R[%d]_OUT_SLIST_RSIZE[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_OUT_SLIST_RSIZE(qno),
+ octep_read_csr64(oct, CN93_SDP_R_OUT_SLIST_RSIZE(qno)));
+ dev_info(dev, "R[%d]_OUT_CNTS[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_OUT_CNTS(qno),
+ octep_read_csr64(oct, CN93_SDP_R_OUT_CNTS(qno)));
+ dev_info(dev, "R[%d]_OUT_INT_LEVELS[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_OUT_INT_LEVELS(qno),
+ octep_read_csr64(oct, CN93_SDP_R_OUT_INT_LEVELS(qno)));
+ dev_info(dev, "R[%d]_OUT_PKT_CNT[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_OUT_PKT_CNT(qno),
+ octep_read_csr64(oct, CN93_SDP_R_OUT_PKT_CNT(qno)));
+ dev_info(dev, "R[%d]_OUT_BYTE_CNT[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_OUT_BYTE_CNT(qno),
+ octep_read_csr64(oct, CN93_SDP_R_OUT_BYTE_CNT(qno)));
+ dev_info(dev, "R[%d]_ERR_TYPE[0x%llx]: 0x%016llx\n",
+ qno, CN93_SDP_R_ERR_TYPE(qno),
+ octep_read_csr64(oct, CN93_SDP_R_ERR_TYPE(qno)));
+}
+
+/* Reset Hardware Tx queue */
+static int cn93_reset_iq(struct octep_device *oct, int q_no)
+{
+ struct octep_config *conf = oct->conf;
+ u64 val = 0ULL;
+
+ dev_dbg(&oct->pdev->dev, "Reset PF IQ-%d\n", q_no);
+
+ /* Get absolute queue number */
+ q_no += conf->pf_ring_cfg.srn;
+
+ /* Disable the Tx/Instruction Ring */
+ octep_write_csr64(oct, CN93_SDP_R_IN_ENABLE(q_no), val);
+
+ /* clear the Instruction Ring packet/byte counts and doorbell CSRs */
+ octep_write_csr64(oct, CN93_SDP_R_IN_CNTS(q_no), val);
+ octep_write_csr64(oct, CN93_SDP_R_IN_INT_LEVELS(q_no), val);
+ octep_write_csr64(oct, CN93_SDP_R_IN_PKT_CNT(q_no), val);
+ octep_write_csr64(oct, CN93_SDP_R_IN_BYTE_CNT(q_no), val);
+ octep_write_csr64(oct, CN93_SDP_R_IN_INSTR_BADDR(q_no), val);
+ octep_write_csr64(oct, CN93_SDP_R_IN_INSTR_RSIZE(q_no), val);
+
+ val = 0xFFFFFFFF;
+ octep_write_csr64(oct, CN93_SDP_R_IN_INSTR_DBELL(q_no), val);
+
+ return 0;
+}
+
+/* Reset Hardware Rx queue */
+static void cn93_reset_oq(struct octep_device *oct, int q_no)
+{
+ u64 val = 0ULL;
+
+ q_no += CFG_GET_PORTS_PF_SRN(oct->conf);
+
+ /* Disable Output (Rx) Ring */
+ octep_write_csr64(oct, CN93_SDP_R_OUT_ENABLE(q_no), val);
+
+ /* Clear count CSRs */
+ val = octep_read_csr(oct, CN93_SDP_R_OUT_CNTS(q_no));
+ octep_write_csr(oct, CN93_SDP_R_OUT_CNTS(q_no), val);
+
+ octep_write_csr64(oct, CN93_SDP_R_OUT_PKT_CNT(q_no), 0xFFFFFFFFFULL);
+ octep_write_csr64(oct, CN93_SDP_R_OUT_SLIST_DBELL(q_no), 0xFFFFFFFF);
+}
+
/* Reset all hardware Tx/Rx queues */
static void octep_reset_io_queues_cn93_pf(struct octep_device *oct)
{
+ struct pci_dev *pdev = oct->pdev;
+ int q;
+
+ dev_dbg(&pdev->dev, "Reset OCTEP_CN93 PF IO Queues\n");
+
+ for (q = 0; q < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); q++) {
+ cn93_reset_iq(oct, q);
+ cn93_reset_oq(oct, q);
+ }
}

/* Initialize windowed addresses to access some hardware registers */
static void octep_setup_pci_window_regs_cn93_pf(struct octep_device *oct)
{
+ u8 __iomem *bar0_pciaddr = oct->mmio[0].hw_addr;
+
+ oct->pci_win_regs.pci_win_wr_addr = (u8 __iomem *)(bar0_pciaddr + CN93_SDP_WIN_WR_ADDR64);
+ oct->pci_win_regs.pci_win_rd_addr = (u8 __iomem *)(bar0_pciaddr + CN93_SDP_WIN_RD_ADDR64);
+ oct->pci_win_regs.pci_win_wr_data = (u8 __iomem *)(bar0_pciaddr + CN93_SDP_WIN_WR_DATA64);
+ oct->pci_win_regs.pci_win_rd_data = (u8 __iomem *)(bar0_pciaddr + CN93_SDP_WIN_RD_DATA64);
}

/* Configure Hardware mapping: inform hardware which rings belong to PF. */
static void octep_configure_ring_mapping_cn93_pf(struct octep_device *oct)
{
+ struct octep_config *conf = oct->conf;
+ struct pci_dev *pdev = oct->pdev;
+ u64 pf_srn = CFG_GET_PORTS_PF_SRN(oct->conf);
+ int q;
+
+ for (q = 0; q < CFG_GET_PORTS_ACTIVE_IO_RINGS(conf); q++) {
+ u64 regval = 0;
+
+ if (oct->pcie_port)
+ regval = 8 << CN93_SDP_FUNC_SEL_EPF_BIT_POS;
+
+ octep_write_csr64(oct, CN93_SDP_EPVF_RING(pf_srn + q), regval);
+
+ regval = octep_read_csr64(oct, CN93_SDP_EPVF_RING(pf_srn + q));
+ dev_dbg(&pdev->dev, "Write SDP_EPVF_RING[0x%llx] = 0x%llx\n",
+ CN93_SDP_EPVF_RING(pf_srn + q), regval);
+ }
}

/* Initialize configuration limits and initial active config 93xx PF. */
@@ -95,27 +240,265 @@ static void octep_init_config_cn93_pf(struct octep_device *oct)
/* Setup registers for a hardware Tx Queue */
static void octep_setup_iq_regs_cn93_pf(struct octep_device *oct, int iq_no)
{
+ struct octep_iq *iq = oct->iq[iq_no];
+ u32 reset_instr_cnt;
+ u64 reg_val;
+
+ iq_no += CFG_GET_PORTS_PF_SRN(oct->conf);
+ reg_val = octep_read_csr64(oct, CN93_SDP_R_IN_CONTROL(iq_no));
+
+ /* wait for IDLE to set to 1 */
+ if (!(reg_val & CN93_R_IN_CTL_IDLE)) {
+ do {
+ reg_val = octep_read_csr64(oct, CN93_SDP_R_IN_CONTROL(iq_no));
+ } while (!(reg_val & CN93_R_IN_CTL_IDLE));
+ }
+
+ reg_val |= CN93_R_IN_CTL_RDSIZE;
+ reg_val |= CN93_R_IN_CTL_IS_64B;
+ reg_val |= CN93_R_IN_CTL_ESR;
+ octep_write_csr64(oct, CN93_SDP_R_IN_CONTROL(iq_no), reg_val);
+
+ /* Write the start of the input queue's ring and its size */
+ octep_write_csr64(oct, CN93_SDP_R_IN_INSTR_BADDR(iq_no),
+ iq->desc_ring_dma);
+ octep_write_csr64(oct, CN93_SDP_R_IN_INSTR_RSIZE(iq_no),
+ iq->max_count);
+
+ /* Remember the doorbell & instruction count register addr
+ * for this queue
+ */
+ iq->doorbell_reg = oct->mmio[0].hw_addr +
+ CN93_SDP_R_IN_INSTR_DBELL(iq_no);
+ iq->inst_cnt_reg = oct->mmio[0].hw_addr +
+ CN93_SDP_R_IN_CNTS(iq_no);
+ iq->intr_lvl_reg = oct->mmio[0].hw_addr +
+ CN93_SDP_R_IN_INT_LEVELS(iq_no);
+
+ /* Store the current instruction counter (used in flush_iq calculation) */
+ reset_instr_cnt = readl(iq->inst_cnt_reg);
+ writel(reset_instr_cnt, iq->inst_cnt_reg);
+
+ /* INTR_THRESHOLD is set to max(FFFFFFFF) to disable the INTR */
+ reg_val = CFG_GET_IQ_INTR_THRESHOLD(oct->conf) & 0xffffffff;
+ octep_write_csr64(oct, CN93_SDP_R_IN_INT_LEVELS(iq_no), reg_val);
}

/* Setup registers for a hardware Rx Queue */
static void octep_setup_oq_regs_cn93_pf(struct octep_device *oct, int oq_no)
{
+ u64 reg_val;
+ u64 oq_ctl = 0ULL;
+ u32 time_threshold = 0;
+ struct octep_oq *oq = oct->oq[oq_no];
+
+ oq_no += CFG_GET_PORTS_PF_SRN(oct->conf);
+ reg_val = octep_read_csr64(oct, CN93_SDP_R_OUT_CONTROL(oq_no));
+
+ /* wait for IDLE to set to 1 */
+ if (!(reg_val & CN93_R_OUT_CTL_IDLE)) {
+ do {
+ reg_val = octep_read_csr64(oct, CN93_SDP_R_OUT_CONTROL(oq_no));
+ } while (!(reg_val & CN93_R_OUT_CTL_IDLE));
+ }
+
+ reg_val &= ~(CN93_R_OUT_CTL_IMODE);
+ reg_val &= ~(CN93_R_OUT_CTL_ROR_P);
+ reg_val &= ~(CN93_R_OUT_CTL_NSR_P);
+ reg_val &= ~(CN93_R_OUT_CTL_ROR_I);
+ reg_val &= ~(CN93_R_OUT_CTL_NSR_I);
+ reg_val &= ~(CN93_R_OUT_CTL_ES_I);
+ reg_val &= ~(CN93_R_OUT_CTL_ROR_D);
+ reg_val &= ~(CN93_R_OUT_CTL_NSR_D);
+ reg_val &= ~(CN93_R_OUT_CTL_ES_D);
+ reg_val |= (CN93_R_OUT_CTL_ES_P);
+
+ octep_write_csr64(oct, CN93_SDP_R_OUT_CONTROL(oq_no), reg_val);
+ octep_write_csr64(oct, CN93_SDP_R_OUT_SLIST_BADDR(oq_no),
+ oq->desc_ring_dma);
+ octep_write_csr64(oct, CN93_SDP_R_OUT_SLIST_RSIZE(oq_no),
+ oq->max_count);
+
+ oq_ctl = octep_read_csr64(oct, CN93_SDP_R_OUT_CONTROL(oq_no));
+ oq_ctl &= ~0x7fffffULL; //clear the ISIZE and BSIZE (22-0)
+ oq_ctl |= (oq->buffer_size & 0xffff); //populate the BSIZE (15-0)
+ octep_write_csr64(oct, CN93_SDP_R_OUT_CONTROL(oq_no), oq_ctl);
+
+ /* Get the mapped address of the pkt_sent and pkts_credit regs */
+ oq->pkts_sent_reg = oct->mmio[0].hw_addr + CN93_SDP_R_OUT_CNTS(oq_no);
+ oq->pkts_credit_reg = oct->mmio[0].hw_addr +
+ CN93_SDP_R_OUT_SLIST_DBELL(oq_no);
+
+ time_threshold = CFG_GET_OQ_INTR_TIME(oct->conf);
+ reg_val = ((u64)time_threshold << 32) |
+ CFG_GET_OQ_INTR_PKT(oct->conf);
+ octep_write_csr64(oct, CN93_SDP_R_OUT_INT_LEVELS(oq_no), reg_val);
}

/* Setup registers for a PF mailbox */
static void octep_setup_mbox_regs_cn93_pf(struct octep_device *oct, int q_no)
{
+ struct octep_mbox *mbox = oct->mbox[q_no];
+
+ mbox->q_no = q_no;
+
+ /* PF mbox interrupt reg */
+ mbox->mbox_int_reg = (u8 *)oct->mmio[0].hw_addr + CN93_SDP_EPF_MBOX_RINT(0);
+
+ /* PF to VF DATA reg. PF writes into this reg */
+ mbox->mbox_write_reg = (u8 *)oct->mmio[0].hw_addr + CN93_SDP_R_MBOX_PF_VF_DATA(q_no);
+
+ /* VF to PF DATA reg. PF reads from this reg */
+ mbox->mbox_read_reg = (u8 *)oct->mmio[0].hw_addr + CN93_SDP_R_MBOX_VF_PF_DATA(q_no);
+}
+
+/* Mailbox Interrupt handler */
+static void cn93_handle_pf_mbox_intr(struct octep_device *oct)
+{
+ u64 mbox_int_val = 0ULL, val = 0ULL, qno = 0ULL;
+
+ mbox_int_val = readq(oct->mbox[0]->mbox_int_reg);
+ for (qno = 0; qno < OCTEP_MAX_VF; qno++) {
+ val = readq(oct->mbox[qno]->mbox_read_reg);
+ dev_dbg(&oct->pdev->dev,
+ "PF MBOX READ: val:%llx from VF:%llx\n", val, qno);
+ }
+
+ writeq(mbox_int_val, oct->mbox[0]->mbox_int_reg);
}

/* Interrupts handler for all non-queue generic interrupts. */
static irqreturn_t octep_non_ioq_intr_handler_cn93_pf(void *dev)
{
+ struct octep_device *oct = (struct octep_device *)dev;
+ struct pci_dev *pdev = oct->pdev;
+ u64 reg_val = 0;
+ int i = 0;
+
+ /* Check for IRERR INTR */
+ reg_val = octep_read_csr64(oct, CN93_SDP_EPF_IRERR_RINT);
+ if (reg_val) {
+ dev_info(&pdev->dev,
+ "received IRERR_RINT intr: 0x%llx\n", reg_val);
+ octep_write_csr64(oct, CN93_SDP_EPF_IRERR_RINT, reg_val);
+
+ for (i = 0; i < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); i++) {
+ reg_val = octep_read_csr64(oct,
+ CN93_SDP_R_ERR_TYPE(i));
+ if (reg_val) {
+ dev_info(&pdev->dev,
+ "Received err type on IQ-%d: 0x%llx\n",
+ i, reg_val);
+ octep_write_csr64(oct, CN93_SDP_R_ERR_TYPE(i),
+ reg_val);
+ }
+ }
+ goto irq_handled;
+ }
+
+ /* Check for ORERR INTR */
+ reg_val = octep_read_csr64(oct, CN93_SDP_EPF_ORERR_RINT);
+ if (reg_val) {
+ dev_info(&pdev->dev,
+ "Received ORERR_RINT intr: 0x%llx\n", reg_val);
+ octep_write_csr64(oct, CN93_SDP_EPF_ORERR_RINT, reg_val);
+ for (i = 0; i < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); i++) {
+ reg_val = octep_read_csr64(oct, CN93_SDP_R_ERR_TYPE(i));
+ if (reg_val) {
+ dev_info(&pdev->dev,
+ "Received err type on OQ-%d: 0x%llx\n",
+ i, reg_val);
+ octep_write_csr64(oct, CN93_SDP_R_ERR_TYPE(i),
+ reg_val);
+ }
+ }
+
+ goto irq_handled;
+ }
+
+ /* Check for VFIRE INTR */
+ reg_val = octep_read_csr64(oct, CN93_SDP_EPF_VFIRE_RINT(0));
+ if (reg_val) {
+ dev_info(&pdev->dev,
+ "Received VFIRE_RINT intr: 0x%llx\n", reg_val);
+ octep_write_csr64(oct, CN93_SDP_EPF_VFIRE_RINT(0), reg_val);
+ goto irq_handled;
+ }
+
+ /* Check for VFORE INTR */
+ reg_val = octep_read_csr64(oct, CN93_SDP_EPF_VFORE_RINT(0));
+ if (reg_val) {
+ dev_info(&pdev->dev,
+ "Received VFORE_RINT intr: 0x%llx\n", reg_val);
+ octep_write_csr64(oct, CN93_SDP_EPF_VFORE_RINT(0), reg_val);
+ goto irq_handled;
+ }
+
+ /* Check for MBOX INTR */
+ reg_val = octep_read_csr64(oct, CN93_SDP_EPF_MBOX_RINT(0));
+ if (reg_val) {
+ dev_info(&pdev->dev,
+ "Received MBOX_RINT intr: 0x%llx\n", reg_val);
+ cn93_handle_pf_mbox_intr(oct);
+ goto irq_handled;
+ }
+
+ /* Check for OEI INTR */
+ reg_val = octep_read_csr64(oct, CN93_SDP_EPF_OEI_RINT);
+ if (reg_val) {
+ dev_info(&pdev->dev,
+ "Received OEI_EINT intr: 0x%llx\n", reg_val);
+ octep_write_csr64(oct, CN93_SDP_EPF_OEI_RINT, reg_val);
+ queue_work(octep_wq, &oct->ctrl_mbox_task);
+ goto irq_handled;
+ }
+
+ /* Check for DMA INTR */
+ reg_val = octep_read_csr64(oct, CN93_SDP_EPF_DMA_RINT);
+ if (reg_val) {
+ octep_write_csr64(oct, CN93_SDP_EPF_DMA_RINT, reg_val);
+ goto irq_handled;
+ }
+
+ /* Check for DMA VF INTR */
+ reg_val = octep_read_csr64(oct, CN93_SDP_EPF_DMA_VF_RINT(0));
+ if (reg_val) {
+ dev_info(&pdev->dev,
+ "Received DMA_VF_RINT intr: 0x%llx\n", reg_val);
+ octep_write_csr64(oct, CN93_SDP_EPF_DMA_VF_RINT(0), reg_val);
+ goto irq_handled;
+ }
+
+ /* Check for PPVF INTR */
+ reg_val = octep_read_csr64(oct, CN93_SDP_EPF_PP_VF_RINT(0));
+ if (reg_val) {
+ dev_info(&pdev->dev,
+ "Received PP_VF_RINT intr: 0x%llx\n", reg_val);
+ octep_write_csr64(oct, CN93_SDP_EPF_PP_VF_RINT(0), reg_val);
+ goto irq_handled;
+ }
+
+ /* Check for MISC INTR */
+ reg_val = octep_read_csr64(oct, CN93_SDP_EPF_MISC_RINT);
+ if (reg_val) {
+ dev_info(&pdev->dev,
+ "Received MISC_RINT intr: 0x%llx\n", reg_val);
+ octep_write_csr64(oct, CN93_SDP_EPF_MISC_RINT, reg_val);
+ goto irq_handled;
+ }
+
+ dev_info(&pdev->dev, "Reserved inerrupts raised; Ignore\n");
+irq_handled:
return IRQ_HANDLED;
}

/* Tx/Rx queue interrupt handler */
static irqreturn_t octep_ioq_intr_handler_cn93_pf(void *data)
{
+ struct octep_ioq_vector *vector = (struct octep_ioq_vector *)data;
+ struct octep_oq *oq = vector->oq;
+
+ napi_schedule_irqoff(oq->napi);
return IRQ_HANDLED;
}

@@ -139,57 +522,170 @@ static int octep_soft_reset_cn93_pf(struct octep_device *oct)
/* Re-initialize Octeon hardware registers */
static void octep_reinit_regs_cn93_pf(struct octep_device *oct)
{
+ u32 i;
+
+ for (i = 0; i < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); i++)
+ oct->hw_ops.setup_iq_regs(oct, i);
+
+ for (i = 0; i < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); i++)
+ oct->hw_ops.setup_oq_regs(oct, i);
+
+ oct->hw_ops.enable_interrupts(oct);
+ oct->hw_ops.enable_io_queues(oct);
+
+ for (i = 0; i < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); i++)
+ writel(oct->oq[i]->max_count, oct->oq[i]->pkts_credit_reg);
}

/* Enable all interrupts */
static void octep_enable_interrupts_cn93_pf(struct octep_device *oct)
{
+ u64 intr_mask = 0ULL;
+ int srn, num_rings, i;
+
+ srn = CFG_GET_PORTS_PF_SRN(oct->conf);
+ num_rings = CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf);
+
+ for (i = 0; i < num_rings; i++)
+ intr_mask |= (0x1ULL << (srn + i));
+
+ octep_write_csr64(oct, CN93_SDP_EPF_IRERR_RINT_ENA_W1S, intr_mask);
+ octep_write_csr64(oct, CN93_SDP_EPF_ORERR_RINT_ENA_W1S, intr_mask);
+ octep_write_csr64(oct, CN93_SDP_EPF_OEI_RINT_ENA_W1S, -1ULL);
+ octep_write_csr64(oct, CN93_SDP_EPF_MISC_RINT_ENA_W1S, intr_mask);
+ octep_write_csr64(oct, CN93_SDP_EPF_DMA_RINT_ENA_W1S, intr_mask);
}

/* Disable all interrupts */
static void octep_disable_interrupts_cn93_pf(struct octep_device *oct)
{
+ u64 intr_mask = 0ULL;
+ int srn, num_rings, i;
+
+ srn = CFG_GET_PORTS_PF_SRN(oct->conf);
+ num_rings = CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf);
+
+ for (i = 0; i < num_rings; i++)
+ intr_mask |= (0x1ULL << (srn + i));
+
+ octep_write_csr64(oct, CN93_SDP_EPF_IRERR_RINT_ENA_W1C, intr_mask);
+ octep_write_csr64(oct, CN93_SDP_EPF_ORERR_RINT_ENA_W1C, intr_mask);
+ octep_write_csr64(oct, CN93_SDP_EPF_OEI_RINT_ENA_W1C, -1ULL);
+ octep_write_csr64(oct, CN93_SDP_EPF_MISC_RINT_ENA_W1C, intr_mask);
+ octep_write_csr64(oct, CN93_SDP_EPF_DMA_RINT_ENA_W1C, intr_mask);
}

/* Get new Octeon Read Index: index of descriptor that Octeon reads next. */
static u32 octep_update_iq_read_index_cn93_pf(struct octep_iq *iq)
{
- return 0;
+ u32 pkt_in_done = readl(iq->inst_cnt_reg);
+ u32 last_done, new_idx;
+
+ last_done = pkt_in_done - iq->pkt_in_done;
+ iq->pkt_in_done = pkt_in_done;
+
+ new_idx = (iq->octep_read_index + last_done) % iq->max_count;
+
+ return new_idx;
}

/* Enable a hardware Tx Queue */
static void octep_enable_iq_cn93_pf(struct octep_device *oct, int iq_no)
{
+ u64 loop = HZ;
+ u64 reg_val;
+
+ iq_no += CFG_GET_PORTS_PF_SRN(oct->conf);
+
+ octep_write_csr64(oct, CN93_SDP_R_IN_INSTR_DBELL(iq_no), 0xFFFFFFFF);
+
+ while (octep_read_csr64(oct, CN93_SDP_R_IN_INSTR_DBELL(iq_no)) &&
+ loop--) {
+ schedule_timeout_interruptible(1);
+ }
+
+ reg_val = octep_read_csr64(oct, CN93_SDP_R_IN_INT_LEVELS(iq_no));
+ reg_val |= (0x1ULL << 62);
+ octep_write_csr64(oct, CN93_SDP_R_IN_INT_LEVELS(iq_no), reg_val);
+
+ reg_val = octep_read_csr64(oct, CN93_SDP_R_IN_ENABLE(iq_no));
+ reg_val |= 0x1ULL;
+ octep_write_csr64(oct, CN93_SDP_R_IN_ENABLE(iq_no), reg_val);
}

/* Enable a hardware Rx Queue */
static void octep_enable_oq_cn93_pf(struct octep_device *oct, int oq_no)
{
+ u64 reg_val = 0ULL;
+
+ oq_no += CFG_GET_PORTS_PF_SRN(oct->conf);
+
+ reg_val = octep_read_csr64(oct, CN93_SDP_R_OUT_INT_LEVELS(oq_no));
+ reg_val |= (0x1ULL << 62);
+ octep_write_csr64(oct, CN93_SDP_R_OUT_INT_LEVELS(oq_no), reg_val);
+
+ octep_write_csr64(oct, CN93_SDP_R_OUT_SLIST_DBELL(oq_no), 0xFFFFFFFF);
+
+ reg_val = octep_read_csr64(oct, CN93_SDP_R_OUT_ENABLE(oq_no));
+ reg_val |= 0x1ULL;
+ octep_write_csr64(oct, CN93_SDP_R_OUT_ENABLE(oq_no), reg_val);
}

/* Enable all hardware Tx/Rx Queues assined to PF */
static void octep_enable_io_queues_cn93_pf(struct octep_device *oct)
{
+ u8 q;
+
+ for (q = 0; q < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); q++) {
+ octep_enable_iq_cn93_pf(oct, q);
+ octep_enable_oq_cn93_pf(oct, q);
+ }
}

/* Disable a hardware Tx Queue assined to PF */
static void octep_disable_iq_cn93_pf(struct octep_device *oct, int iq_no)
{
+ u64 reg_val = 0ULL;
+
+ iq_no += CFG_GET_PORTS_PF_SRN(oct->conf);
+
+ reg_val = octep_read_csr64(oct, CN93_SDP_R_IN_ENABLE(iq_no));
+ reg_val &= ~0x1ULL;
+ octep_write_csr64(oct, CN93_SDP_R_IN_ENABLE(iq_no), reg_val);
}

/* Disable a hardware Rx Queue assined to PF */
static void octep_disable_oq_cn93_pf(struct octep_device *oct, int oq_no)
{
+ u64 reg_val = 0ULL;
+
+ oq_no += CFG_GET_PORTS_PF_SRN(oct->conf);
+ reg_val = octep_read_csr64(oct, CN93_SDP_R_OUT_ENABLE(oq_no));
+ reg_val &= ~0x1ULL;
+ octep_write_csr64(oct, CN93_SDP_R_OUT_ENABLE(oq_no), reg_val);
}

/* Disable all hardware Tx/Rx Queues assined to PF */
static void octep_disable_io_queues_cn93_pf(struct octep_device *oct)
{
+ int q = 0;
+
+ for (q = 0; q < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); q++) {
+ octep_disable_iq_cn93_pf(oct, q);
+ octep_disable_oq_cn93_pf(oct, q);
+ }
}

/* Dump hardware registers (including Tx/Rx queues) for debugging. */
static void octep_dump_registers_cn93_pf(struct octep_device *oct)
{
+ u8 srn, num_rings, q;
+
+ srn = CFG_GET_PORTS_PF_SRN(oct->conf);
+ num_rings = CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf);
+
+ for (q = srn; q < srn + num_rings; q++)
+ cn93_dump_regs(oct, q);
}

/**
--
2.17.1
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