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author | Raghu Vatsavayi <rvatsavayi@caviumnetworks.com> | 2016-09-01 11:16:06 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2016-09-02 17:11:30 -0700 |
commit | 9bdd46095fb9476323c490674b4c5e1ec61f8a53 (patch) | |
tree | 6a2bfed340b50f368c139c3a40b26bf6ebc9369a /drivers/net/ethernet/cavium/liquidio | |
parent | afdf841fee732bd89d53530dd06ea8b4748ed8be (diff) | |
download | linux-9bdd46095fb9476323c490674b4c5e1ec61f8a53.tar.gz linux-9bdd46095fb9476323c490674b4c5e1ec61f8a53.tar.bz2 linux-9bdd46095fb9476323c490674b4c5e1ec61f8a53.zip |
liquidio: CN23XX IQ access
Adds support for Instruction Queue(IQ) index manipulation
routines through bar1 of cn23xx.
Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cavium/liquidio')
-rw-r--r-- | drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.c b/drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.c index 2d812064731a..bddb198c0b74 100644 --- a/drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.c +++ b/drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.c @@ -887,6 +887,67 @@ static irqreturn_t cn23xx_interrupt_handler(void *dev) return IRQ_HANDLED; } +static void cn23xx_bar1_idx_setup(struct octeon_device *oct, u64 core_addr, + u32 idx, int valid) +{ + u64 bar1; + u64 reg_adr; + + if (!valid) { + reg_adr = lio_pci_readq( + oct, CN23XX_PEM_BAR1_INDEX_REG(oct->pcie_port, idx)); + WRITE_ONCE(bar1, reg_adr); + lio_pci_writeq(oct, (READ_ONCE(bar1) & 0xFFFFFFFEULL), + CN23XX_PEM_BAR1_INDEX_REG(oct->pcie_port, idx)); + reg_adr = lio_pci_readq( + oct, CN23XX_PEM_BAR1_INDEX_REG(oct->pcie_port, idx)); + WRITE_ONCE(bar1, reg_adr); + return; + } + + /* The PEM(0..3)_BAR1_INDEX(0..15)[ADDR_IDX]<23:4> stores + * bits <41:22> of the Core Addr + */ + lio_pci_writeq(oct, (((core_addr >> 22) << 4) | PCI_BAR1_MASK), + CN23XX_PEM_BAR1_INDEX_REG(oct->pcie_port, idx)); + + WRITE_ONCE(bar1, lio_pci_readq( + oct, CN23XX_PEM_BAR1_INDEX_REG(oct->pcie_port, idx))); +} + +static void cn23xx_bar1_idx_write(struct octeon_device *oct, u32 idx, u32 mask) +{ + lio_pci_writeq(oct, mask, + CN23XX_PEM_BAR1_INDEX_REG(oct->pcie_port, idx)); +} + +static u32 cn23xx_bar1_idx_read(struct octeon_device *oct, u32 idx) +{ + return (u32)lio_pci_readq( + oct, CN23XX_PEM_BAR1_INDEX_REG(oct->pcie_port, idx)); +} + +/* always call with lock held */ +static u32 cn23xx_update_read_index(struct octeon_instr_queue *iq) +{ + u32 new_idx; + u32 last_done; + u32 pkt_in_done = readl(iq->inst_cnt_reg); + + last_done = pkt_in_done - iq->pkt_in_done; + iq->pkt_in_done = pkt_in_done; + + /* Modulo of the new index with the IQ size will give us + * the new index. The iq->reset_instr_cnt is always zero for + * cn23xx, so no extra adjustments are needed. + */ + new_idx = (iq->octeon_read_index + + (u32)(last_done & CN23XX_PKT_IN_DONE_CNT_MASK)) % + iq->max_count; + + return new_idx; +} + static void cn23xx_enable_pf_interrupt(struct octeon_device *oct, u8 intr_flag) { struct octeon_cn23xx_pf *cn23xx = (struct octeon_cn23xx_pf *)oct->chip; @@ -1063,6 +1124,11 @@ int setup_cn23xx_octeon_pf_device(struct octeon_device *oct) oct->fn_list.soft_reset = cn23xx_pf_soft_reset; oct->fn_list.setup_device_regs = cn23xx_setup_pf_device_regs; + oct->fn_list.update_iq_read_idx = cn23xx_update_read_index; + + oct->fn_list.bar1_idx_setup = cn23xx_bar1_idx_setup; + oct->fn_list.bar1_idx_write = cn23xx_bar1_idx_write; + oct->fn_list.bar1_idx_read = cn23xx_bar1_idx_read; oct->fn_list.enable_interrupt = cn23xx_enable_pf_interrupt; oct->fn_list.disable_interrupt = cn23xx_disable_pf_interrupt; |