From 497938890a0121d040683aa1db42cad8daf7ae97 Mon Sep 17 00:00:00 2001 From: Jon Mason Date: Mon, 15 Jul 2013 15:53:54 -0700 Subject: [PATCH] NTB: Rename Variables for NTB-RP Many variable names in the NTB driver refer to the primary or secondary side. However, these variables will be used to access the reverse case when in NTB-RP mode. Make these names more generic in anticipation of NTB-RP support. Signed-off-by: Jon Mason --- drivers/ntb/ntb_hw.c | 83 ++++++++++++++++++------------------- drivers/ntb/ntb_hw.h | 12 +++--- drivers/ntb/ntb_transport.c | 2 +- 3 files changed, 48 insertions(+), 49 deletions(-) diff --git a/drivers/ntb/ntb_hw.c b/drivers/ntb/ntb_hw.c index 0345817a8355..97b18eec3d39 100644 --- a/drivers/ntb/ntb_hw.c +++ b/drivers/ntb/ntb_hw.c @@ -167,9 +167,9 @@ int ntb_register_db_callback(struct ntb_device *ndev, unsigned int idx, ndev->db_cb[idx].data = data; /* unmask interrupt */ - mask = readw(ndev->reg_ofs.pdb_mask); + mask = readw(ndev->reg_ofs.ldb_mask); clear_bit(idx * ndev->bits_per_vector, &mask); - writew(mask, ndev->reg_ofs.pdb_mask); + writew(mask, ndev->reg_ofs.ldb_mask); return 0; } @@ -189,9 +189,9 @@ void ntb_unregister_db_callback(struct ntb_device *ndev, unsigned int idx) if (idx >= ndev->max_cbs || !ndev->db_cb[idx].callback) return; - mask = readw(ndev->reg_ofs.pdb_mask); + mask = readw(ndev->reg_ofs.ldb_mask); set_bit(idx * ndev->bits_per_vector, &mask); - writew(mask, ndev->reg_ofs.pdb_mask); + writew(mask, ndev->reg_ofs.ldb_mask); ndev->db_cb[idx].callback = NULL; } @@ -423,16 +423,16 @@ void ntb_set_mw_addr(struct ntb_device *ndev, unsigned int mw, u64 addr) switch (MW_TO_BAR(mw)) { case NTB_BAR_23: - writeq(addr, ndev->reg_ofs.sbar2_xlat); + writeq(addr, ndev->reg_ofs.bar2_xlat); break; case NTB_BAR_45: - writeq(addr, ndev->reg_ofs.sbar4_xlat); + writeq(addr, ndev->reg_ofs.bar4_xlat); break; } } /** - * ntb_ring_sdb() - Set the doorbell on the secondary/external side + * ntb_ring_doorbell() - Set the doorbell on the secondary/external side * @ndev: pointer to ntb_device instance * @db: doorbell to ring * @@ -441,15 +441,15 @@ void ntb_set_mw_addr(struct ntb_device *ndev, unsigned int mw, u64 addr) * * RETURNS: An appropriate -ERRNO error value on error, or zero for success. */ -void ntb_ring_sdb(struct ntb_device *ndev, unsigned int db) +void ntb_ring_doorbell(struct ntb_device *ndev, unsigned int db) { dev_dbg(&ndev->pdev->dev, "%s: ringing doorbell %d\n", __func__, db); if (ndev->hw_type == BWD_HW) - writeq((u64) 1 << db, ndev->reg_ofs.sdb); + writeq((u64) 1 << db, ndev->reg_ofs.rdb); else writew(((1 << ndev->bits_per_vector) - 1) << - (db * ndev->bits_per_vector), ndev->reg_ofs.sdb); + (db * ndev->bits_per_vector), ndev->reg_ofs.rdb); } static void bwd_recover_link(struct ntb_device *ndev) @@ -665,10 +665,10 @@ static int ntb_xeon_setup(struct ntb_device *ndev) else ndev->dev_type = NTB_DEV_DSD; - ndev->reg_ofs.pdb = ndev->reg_base + SNB_PDOORBELL_OFFSET; - ndev->reg_ofs.pdb_mask = ndev->reg_base + SNB_PDBMSK_OFFSET; - ndev->reg_ofs.sbar2_xlat = ndev->reg_base + SNB_SBAR2XLAT_OFFSET; - ndev->reg_ofs.sbar4_xlat = ndev->reg_base + SNB_SBAR4XLAT_OFFSET; + ndev->reg_ofs.ldb = ndev->reg_base + SNB_PDOORBELL_OFFSET; + ndev->reg_ofs.ldb_mask = ndev->reg_base + SNB_PDBMSK_OFFSET; + ndev->reg_ofs.bar2_xlat = ndev->reg_base + SNB_SBAR2XLAT_OFFSET; + ndev->reg_ofs.bar4_xlat = ndev->reg_base + SNB_SBAR4XLAT_OFFSET; ndev->reg_ofs.lnk_cntl = ndev->reg_base + SNB_NTBCNTL_OFFSET; ndev->reg_ofs.lnk_stat = ndev->reg_base + SNB_LINK_STATUS_OFFSET; ndev->reg_ofs.spad_read = ndev->reg_base + SNB_SPAD_OFFSET; @@ -687,7 +687,7 @@ static int ntb_xeon_setup(struct ntb_device *ndev) ndev->limits.max_mw = SNB_ERRATA_MAX_MW; ndev->reg_ofs.spad_write = ndev->mw[1].vbase + SNB_SPAD_OFFSET; - ndev->reg_ofs.sdb = ndev->mw[1].vbase + + ndev->reg_ofs.rdb = ndev->mw[1].vbase + SNB_PDOORBELL_OFFSET; /* Set the Limit register to 4k, the minimum size, to @@ -699,7 +699,7 @@ static int ntb_xeon_setup(struct ntb_device *ndev) ndev->limits.max_mw = SNB_MAX_MW; ndev->reg_ofs.spad_write = ndev->reg_base + SNB_B2B_SPAD_OFFSET; - ndev->reg_ofs.sdb = ndev->reg_base + + ndev->reg_ofs.rdb = ndev->reg_base + SNB_B2B_DOORBELL_OFFSET; /* Disable the Limit register, just incase it is set to @@ -801,21 +801,21 @@ static int ntb_bwd_setup(struct ntb_device *ndev) if (rc) return rc; - ndev->reg_ofs.pdb = ndev->reg_base + BWD_PDOORBELL_OFFSET; - ndev->reg_ofs.pdb_mask = ndev->reg_base + BWD_PDBMSK_OFFSET; - ndev->reg_ofs.sbar2_xlat = ndev->reg_base + BWD_SBAR2XLAT_OFFSET; - ndev->reg_ofs.sbar4_xlat = ndev->reg_base + BWD_SBAR4XLAT_OFFSET; + ndev->reg_ofs.ldb = ndev->reg_base + BWD_PDOORBELL_OFFSET; + ndev->reg_ofs.ldb_mask = ndev->reg_base + BWD_PDBMSK_OFFSET; + ndev->reg_ofs.bar2_xlat = ndev->reg_base + BWD_SBAR2XLAT_OFFSET; + ndev->reg_ofs.bar4_xlat = ndev->reg_base + BWD_SBAR4XLAT_OFFSET; ndev->reg_ofs.lnk_cntl = ndev->reg_base + BWD_NTBCNTL_OFFSET; ndev->reg_ofs.lnk_stat = ndev->reg_base + BWD_LINK_STATUS_OFFSET; ndev->reg_ofs.spad_read = ndev->reg_base + BWD_SPAD_OFFSET; ndev->reg_ofs.spci_cmd = ndev->reg_base + BWD_PCICMD_OFFSET; if (ndev->conn_type == NTB_CONN_B2B) { - ndev->reg_ofs.sdb = ndev->reg_base + BWD_B2B_DOORBELL_OFFSET; + ndev->reg_ofs.rdb = ndev->reg_base + BWD_B2B_DOORBELL_OFFSET; ndev->reg_ofs.spad_write = ndev->reg_base + BWD_B2B_SPAD_OFFSET; ndev->limits.max_spads = BWD_MAX_SPADS; } else { - ndev->reg_ofs.sdb = ndev->reg_base + BWD_PDOORBELL_OFFSET; + ndev->reg_ofs.rdb = ndev->reg_base + BWD_PDOORBELL_OFFSET; ndev->reg_ofs.spad_write = ndev->reg_base + BWD_SPAD_OFFSET; ndev->limits.max_spads = BWD_MAX_COMPAT_SPADS; } @@ -895,7 +895,7 @@ static irqreturn_t bwd_callback_msix_irq(int irq, void *data) */ ndev->last_ts = jiffies; - writeq((u64) 1 << db_cb->db_num, ndev->reg_ofs.pdb); + writeq((u64) 1 << db_cb->db_num, ndev->reg_ofs.ldb); return IRQ_HANDLED; } @@ -917,7 +917,7 @@ static irqreturn_t xeon_callback_msix_irq(int irq, void *data) * interrupts. */ writew(((1 << ndev->bits_per_vector) - 1) << - (db_cb->db_num * ndev->bits_per_vector), ndev->reg_ofs.pdb); + (db_cb->db_num * ndev->bits_per_vector), ndev->reg_ofs.ldb); return IRQ_HANDLED; } @@ -935,7 +935,7 @@ static irqreturn_t xeon_event_msix_irq(int irq, void *dev) dev_err(&ndev->pdev->dev, "Error determining link status\n"); /* bit 15 is always the link bit */ - writew(1 << ndev->limits.max_db_bits, ndev->reg_ofs.pdb); + writew(1 << ndev->limits.max_db_bits, ndev->reg_ofs.ldb); return IRQ_HANDLED; } @@ -946,29 +946,28 @@ static irqreturn_t ntb_interrupt(int irq, void *dev) unsigned int i = 0; if (ndev->hw_type == BWD_HW) { - u64 pdb = readq(ndev->reg_ofs.pdb); + u64 ldb = readq(ndev->reg_ofs.ldb); - dev_dbg(&ndev->pdev->dev, "irq %d - pdb = %Lx\n", irq, pdb); + dev_dbg(&ndev->pdev->dev, "irq %d - ldb = %Lx\n", irq, ldb); - while (pdb) { - i = __ffs(pdb); - pdb &= pdb - 1; + while (ldb) { + i = __ffs(ldb); + ldb &= ldb - 1; bwd_callback_msix_irq(irq, &ndev->db_cb[i]); } } else { - u16 pdb = readw(ndev->reg_ofs.pdb); + u16 ldb = readw(ndev->reg_ofs.ldb); - dev_dbg(&ndev->pdev->dev, "irq %d - pdb = %x sdb %x\n", irq, - pdb, readw(ndev->reg_ofs.sdb)); + dev_dbg(&ndev->pdev->dev, "irq %d - ldb = %x\n", irq, ldb); - if (pdb & SNB_DB_HW_LINK) { + if (ldb & SNB_DB_HW_LINK) { xeon_event_msix_irq(irq, dev); - pdb &= ~SNB_DB_HW_LINK; + ldb &= ~SNB_DB_HW_LINK; } - while (pdb) { - i = __ffs(pdb); - pdb &= pdb - 1; + while (ldb) { + i = __ffs(ldb); + ldb &= ldb - 1; xeon_callback_msix_irq(irq, &ndev->db_cb[i]); } } @@ -1126,10 +1125,10 @@ static int ntb_setup_interrupts(struct ntb_device *ndev) * Interrupt. The rest will be unmasked as callbacks are registered. */ if (ndev->hw_type == BWD_HW) - writeq(~0, ndev->reg_ofs.pdb_mask); + writeq(~0, ndev->reg_ofs.ldb_mask); else writew(~(1 << ndev->limits.max_db_bits), - ndev->reg_ofs.pdb_mask); + ndev->reg_ofs.ldb_mask); rc = ntb_setup_msix(ndev); if (!rc) @@ -1158,9 +1157,9 @@ static void ntb_free_interrupts(struct ntb_device *ndev) /* mask interrupts */ if (ndev->hw_type == BWD_HW) - writeq(~0, ndev->reg_ofs.pdb_mask); + writeq(~0, ndev->reg_ofs.ldb_mask); else - writew(~0, ndev->reg_ofs.pdb_mask); + writew(~0, ndev->reg_ofs.ldb_mask); if (ndev->num_msix) { struct msix_entry *msix; diff --git a/drivers/ntb/ntb_hw.h b/drivers/ntb/ntb_hw.h index 4f42ed18103a..0a31cedae7d4 100644 --- a/drivers/ntb/ntb_hw.h +++ b/drivers/ntb/ntb_hw.h @@ -124,11 +124,11 @@ struct ntb_device { unsigned char msix_cnt; } limits; struct { - void __iomem *pdb; - void __iomem *pdb_mask; - void __iomem *sdb; - void __iomem *sbar2_xlat; - void __iomem *sbar4_xlat; + void __iomem *ldb; + void __iomem *ldb_mask; + void __iomem *rdb; + void __iomem *bar2_xlat; + void __iomem *bar4_xlat; void __iomem *spad_write; void __iomem *spad_read; void __iomem *lnk_cntl; @@ -243,7 +243,7 @@ int ntb_read_remote_spad(struct ntb_device *ndev, unsigned int idx, u32 *val); resource_size_t ntb_get_mw_base(struct ntb_device *ndev, unsigned int mw); void __iomem *ntb_get_mw_vbase(struct ntb_device *ndev, unsigned int mw); u64 ntb_get_mw_size(struct ntb_device *ndev, unsigned int mw); -void ntb_ring_sdb(struct ntb_device *ndev, unsigned int idx); +void ntb_ring_doorbell(struct ntb_device *ndev, unsigned int idx); void *ntb_find_transport(struct pci_dev *pdev); int ntb_transport_init(struct pci_dev *pdev); diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c index ae8657259ca0..ae61b443f412 100644 --- a/drivers/ntb/ntb_transport.c +++ b/drivers/ntb/ntb_transport.c @@ -1216,7 +1216,7 @@ static void ntb_tx_copy_callback(void *data) wmb(); iowrite32(entry->flags | DESC_DONE_FLAG, &hdr->flags); - ntb_ring_sdb(qp->ndev, qp->qp_num); + ntb_ring_doorbell(qp->ndev, qp->qp_num); /* The entry length can only be zero if the packet is intended to be a * "link down" or similar. Since no payload is being sent in these -- 2.20.1