diff options
Diffstat (limited to 'drivers/ntb')
| -rw-r--r-- | drivers/ntb/hw/intel/ntb_hw_gen1.h | 1 | ||||
| -rw-r--r-- | drivers/ntb/hw/intel/ntb_hw_gen4.c | 27 | ||||
| -rw-r--r-- | drivers/ntb/hw/intel/ntb_hw_gen4.h | 15 |
3 files changed, 42 insertions, 1 deletions
diff --git a/drivers/ntb/hw/intel/ntb_hw_gen1.h b/drivers/ntb/hw/intel/ntb_hw_gen1.h index 1b759942d8af..344249fc18d1 100644 --- a/drivers/ntb/hw/intel/ntb_hw_gen1.h +++ b/drivers/ntb/hw/intel/ntb_hw_gen1.h @@ -141,6 +141,7 @@ #define NTB_HWERR_B2BDOORBELL_BIT14 BIT_ULL(2) #define NTB_HWERR_MSIX_VECTOR32_BAD BIT_ULL(3) #define NTB_HWERR_BAR_ALIGN BIT_ULL(4) +#define NTB_HWERR_LTR_BAD BIT_ULL(5) extern struct intel_b2b_addr xeon_b2b_usd_addr; extern struct intel_b2b_addr xeon_b2b_dsd_addr; diff --git a/drivers/ntb/hw/intel/ntb_hw_gen4.c b/drivers/ntb/hw/intel/ntb_hw_gen4.c index bc4541cbf8c6..fede05151f69 100644 --- a/drivers/ntb/hw/intel/ntb_hw_gen4.c +++ b/drivers/ntb/hw/intel/ntb_hw_gen4.c @@ -177,8 +177,10 @@ int gen4_init_dev(struct intel_ntb_dev *ndev) ndev->reg = &gen4_reg; - if (pdev_is_ICX(pdev)) + if (pdev_is_ICX(pdev)) { ndev->hwerr_flags |= NTB_HWERR_BAR_ALIGN; + ndev->hwerr_flags |= NTB_HWERR_LTR_BAD; + } ppd1 = ioread32(ndev->self_mmio + GEN4_PPD1_OFFSET); ndev->ntb.topo = gen4_ppd_topo(ndev, ppd1); @@ -431,6 +433,25 @@ static int intel_ntb4_link_enable(struct ntb_dev *ntb, dev_dbg(&ntb->pdev->dev, "ignoring max_width %d\n", max_width); + if (!(ndev->hwerr_flags & NTB_HWERR_LTR_BAD)) { + u32 ltr; + + /* Setup active snoop LTR values */ + ltr = NTB_LTR_ACTIVE_REQMNT | NTB_LTR_ACTIVE_VAL | NTB_LTR_ACTIVE_LATSCALE; + /* Setup active non-snoop values */ + ltr = (ltr << NTB_LTR_NS_SHIFT) | ltr; + iowrite32(ltr, ndev->self_mmio + GEN4_LTR_ACTIVE_OFFSET); + + /* Setup idle snoop LTR values */ + ltr = NTB_LTR_IDLE_VAL | NTB_LTR_IDLE_LATSCALE | NTB_LTR_IDLE_REQMNT; + /* Setup idle non-snoop values */ + ltr = (ltr << NTB_LTR_NS_SHIFT) | ltr; + iowrite32(ltr, ndev->self_mmio + GEN4_LTR_IDLE_OFFSET); + + /* setup PCIe LTR to active */ + iowrite8(NTB_LTR_SWSEL_ACTIVE, ndev->self_mmio + GEN4_LTR_SWSEL_OFFSET); + } + ntb_ctl = NTB_CTL_E2I_BAR23_SNOOP | NTB_CTL_I2E_BAR23_SNOOP; ntb_ctl |= NTB_CTL_E2I_BAR45_SNOOP | NTB_CTL_I2E_BAR45_SNOOP; iowrite32(ntb_ctl, ndev->self_mmio + ndev->reg->ntb_ctl); @@ -476,6 +497,10 @@ static int intel_ntb4_link_disable(struct ntb_dev *ntb) lnkctl |= GEN4_LINK_CTRL_LINK_DISABLE; iowrite16(lnkctl, ndev->self_mmio + GEN4_LINK_CTRL_OFFSET); + /* set LTR to idle */ + if (!(ndev->hwerr_flags & NTB_HWERR_LTR_BAD)) + iowrite8(NTB_LTR_SWSEL_IDLE, ndev->self_mmio + GEN4_LTR_SWSEL_OFFSET); + ndev->dev_up = 0; return 0; diff --git a/drivers/ntb/hw/intel/ntb_hw_gen4.h b/drivers/ntb/hw/intel/ntb_hw_gen4.h index a868c788de02..3fcd3fdce9ed 100644 --- a/drivers/ntb/hw/intel/ntb_hw_gen4.h +++ b/drivers/ntb/hw/intel/ntb_hw_gen4.h @@ -35,6 +35,9 @@ #define GEN4_IM_SPAD_SEM_OFFSET 0x00c0 /* SPAD hw semaphore */ #define GEN4_IM_SPAD_STICKY_OFFSET 0x00c4 /* sticky SPAD */ #define GEN4_IM_DOORBELL_OFFSET 0x0100 /* 0-31 doorbells */ +#define GEN4_LTR_SWSEL_OFFSET 0x30ec +#define GEN4_LTR_ACTIVE_OFFSET 0x30f0 +#define GEN4_LTR_IDLE_OFFSET 0x30f4 #define GEN4_EM_SPAD_OFFSET 0x8080 /* note, link status is now in MMIO and not config space for NTB */ #define GEN4_LINK_CTRL_OFFSET 0xb050 @@ -80,6 +83,18 @@ #define NTB_SJC_FORCEDETECT 0x000004 +#define NTB_LTR_SWSEL_ACTIVE 0x0 +#define NTB_LTR_SWSEL_IDLE 0x1 + +#define NTB_LTR_NS_SHIFT 16 +#define NTB_LTR_ACTIVE_VAL 0x0000 /* 0 us */ +#define NTB_LTR_ACTIVE_LATSCALE 0x0800 /* 1us scale */ +#define NTB_LTR_ACTIVE_REQMNT 0x8000 /* snoop req enable */ + +#define NTB_LTR_IDLE_VAL 0x0258 /* 600 us */ +#define NTB_LTR_IDLE_LATSCALE 0x0800 /* 1us scale */ +#define NTB_LTR_IDLE_REQMNT 0x8000 /* snoop req enable */ + ssize_t ndev_ntb4_debugfs_read(struct file *filp, char __user *ubuf, size_t count, loff_t *offp); int gen4_init_dev(struct intel_ntb_dev *ndev); |