sfc: Always map MCDI shared memory as uncacheable

[pandora-kernel.git] / drivers / net / sfc / mcdi.c

diff --git a/drivers/net/sfc/mcdi.c b/drivers/net/sfc/mcdi.c
index d984790..3dd45ed 100644 (file)
--- a/drivers/net/sfc/mcdi.c
+++ b/drivers/net/sfc/mcdi.c
@@ -50,6 +50,20 @@ static inline struct efx_mcdi_iface *efx_mcdi(struct efx_nic *efx)
        return &nic_data->mcdi;
 }
 
+static inline void
+efx_mcdi_readd(struct efx_nic *efx, efx_dword_t *value, unsigned reg)
+{
+       struct siena_nic_data *nic_data = efx->nic_data;
+       value->u32[0] = (__force __le32)__raw_readl(nic_data->mcdi_smem + reg);
+}
+
+static inline void
+efx_mcdi_writed(struct efx_nic *efx, const efx_dword_t *value, unsigned reg)
+{
+       struct siena_nic_data *nic_data = efx->nic_data;
+       __raw_writel((__force u32)value->u32[0], nic_data->mcdi_smem + reg);
+}
+
 void efx_mcdi_init(struct efx_nic *efx)
 {
        struct efx_mcdi_iface *mcdi;
@@ -70,8 +84,8 @@ static void efx_mcdi_copyin(struct efx_nic *efx, unsigned cmd,
                            const u8 *inbuf, size_t inlen)
 {
        struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
-       unsigned pdu = FR_CZ_MC_TREG_SMEM + MCDI_PDU(efx);
-       unsigned doorbell = FR_CZ_MC_TREG_SMEM + MCDI_DOORBELL(efx);
+       unsigned pdu = MCDI_PDU(efx);
+       unsigned doorbell = MCDI_DOORBELL(efx);
        unsigned int i;
        efx_dword_t hdr;
        u32 xflags, seqno;
@@ -92,30 +106,28 @@ static void efx_mcdi_copyin(struct efx_nic *efx, unsigned cmd,
                             MCDI_HEADER_SEQ, seqno,
                             MCDI_HEADER_XFLAGS, xflags);
 
-       efx_writed(efx, &hdr, pdu);
+       efx_mcdi_writed(efx, &hdr, pdu);
 
-       for (i = 0; i < inlen; i += 4) {
-               _efx_writed(efx, *((__le32 *)(inbuf + i)), pdu + 4 + i);
-               /* use wmb() within loop to inhibit write combining */
-               wmb();
-       }
+       for (i = 0; i < inlen; i += 4)
+               efx_mcdi_writed(efx, (const efx_dword_t *)(inbuf + i),
+                               pdu + 4 + i);
 
        /* ring the doorbell with a distinctive value */
-       _efx_writed(efx, (__force __le32) 0x45789abc, doorbell);
-       wmb();
+       EFX_POPULATE_DWORD_1(hdr, EFX_DWORD_0, 0x45789abc);
+       efx_mcdi_writed(efx, &hdr, doorbell);
 }
 
 static void efx_mcdi_copyout(struct efx_nic *efx, u8 *outbuf, size_t outlen)
 {
        struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
-       unsigned int pdu = FR_CZ_MC_TREG_SMEM + MCDI_PDU(efx);
+       unsigned int pdu = MCDI_PDU(efx);
        int i;
 
        BUG_ON(atomic_read(&mcdi->state) == MCDI_STATE_QUIESCENT);
        BUG_ON(outlen & 3 || outlen >= 0x100);
 
        for (i = 0; i < outlen; i += 4)
-               *((__le32 *)(outbuf + i)) = _efx_readd(efx, pdu + 4 + i);
+               efx_mcdi_readd(efx, (efx_dword_t *)(outbuf + i), pdu + 4 + i);
 }
 
 static int efx_mcdi_poll(struct efx_nic *efx)
@@ -123,7 +135,7 @@ static int efx_mcdi_poll(struct efx_nic *efx)
        struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
        unsigned int time, finish;
        unsigned int respseq, respcmd, error;
-       unsigned int pdu = FR_CZ_MC_TREG_SMEM + MCDI_PDU(efx);
+       unsigned int pdu = MCDI_PDU(efx);
        unsigned int rc, spins;
        efx_dword_t reg;
 
@@ -149,8 +161,7 @@ static int efx_mcdi_poll(struct efx_nic *efx)
 
                time = get_seconds();
 
-               rmb();
-               efx_readd(efx, &reg, pdu);
+               efx_mcdi_readd(efx, &reg, pdu);
 
                /* All 1's indicates that shared memory is in reset (and is
                 * not a valid header). Wait for it to come out reset before
@@ -177,7 +188,7 @@ static int efx_mcdi_poll(struct efx_nic *efx)
                          respseq, mcdi->seqno);
                rc = EIO;
        } else if (error) {
-               efx_readd(efx, &reg, pdu + 4);
+               efx_mcdi_readd(efx, &reg, pdu + 4);
                switch (EFX_DWORD_FIELD(reg, EFX_DWORD_0)) {
 #define TRANSLATE_ERROR(name)                                  \
                case MC_CMD_ERR_ ## name:                       \
@@ -211,21 +222,21 @@ out:
 /* Test and clear MC-rebooted flag for this port/function */
 int efx_mcdi_poll_reboot(struct efx_nic *efx)
 {
-       unsigned int addr = FR_CZ_MC_TREG_SMEM + MCDI_REBOOT_FLAG(efx);
+       unsigned int addr = MCDI_REBOOT_FLAG(efx);
        efx_dword_t reg;
        uint32_t value;
 
        if (efx_nic_rev(efx) < EFX_REV_SIENA_A0)
                return false;
 
-       efx_readd(efx, &reg, addr);
+       efx_mcdi_readd(efx, &reg, addr);
        value = EFX_DWORD_FIELD(reg, EFX_DWORD_0);
 
        if (value == 0)
                return 0;
 
        EFX_ZERO_DWORD(reg);
-       efx_writed(efx, &reg, addr);
+       efx_mcdi_writed(efx, &reg, addr);
 
        if (value == MC_STATUS_DWORD_ASSERT)
                return -EINTR;