bnx2x: Supporting Device Control Channel

In multi-function mode, the FW can receive special management control commands
to set the Min/Max BW and the the function link state

Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 232 insertions, 93 deletions

diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index 762f37a7d038..8abce3c182e0 100644
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -2104,6 +2104,12 @@ static void bnx2x_calc_fc_adv(struct bnx2x *bp)
 
 static void bnx2x_link_report(struct bnx2x *bp)
 {
+        if (bp->state == BNX2X_STATE_DISABLED) {
+                netif_carrier_off(bp->dev);
+                printk(KERN_ERR PFX "%s NIC Link is Down\n", bp->dev->name);
+                return;
+        }
+
         if (bp->link_vars.link_up) {
                 if (bp->state == BNX2X_STATE_OPEN)
                         netif_carrier_on(bp->dev);
@@ -2240,6 +2246,46 @@ static void bnx2x_init_port_minmax(struct bnx2x *bp)
         bp->cmng.fair_vars.fairness_timeout = fair_periodic_timeout_usec / 4;
 }
 
+/* Calculates the sum of vn_min_rates.
+   It's needed for further normalizing of the min_rates.
+   Returns:
+     sum of vn_min_rates.
+       or
+     0 - if all the min_rates are 0.
+     In the later case fainess algorithm should be deactivated.
+     If not all min_rates are zero then those that are zeroes will be set to 1.
+ */
+static void bnx2x_calc_vn_weight_sum(struct bnx2x *bp)
+{
+        int all_zero = 1;
+        int port = BP_PORT(bp);
+        int vn;
+
+        bp->vn_weight_sum = 0;
+        for (vn = VN_0; vn < E1HVN_MAX; vn++) {
+                int func = 2*vn + port;
+                u32 vn_cfg = SHMEM_RD(bp, mf_cfg.func_mf_config[func].config);
+                u32 vn_min_rate = ((vn_cfg & FUNC_MF_CFG_MIN_BW_MASK) >>
+                                   FUNC_MF_CFG_MIN_BW_SHIFT) * 100;
+
+                /* Skip hidden vns */
+                if (vn_cfg & FUNC_MF_CFG_FUNC_HIDE)
+                        continue;
+
+                /* If min rate is zero - set it to 1 */
+                if (!vn_min_rate)
+                        vn_min_rate = DEF_MIN_RATE;
+                else
+                        all_zero = 0;
+
+                bp->vn_weight_sum += vn_min_rate;
+        }
+
+        /* ... only if all min rates are zeros - disable fairness */
+        if (all_zero)
+                bp->vn_weight_sum = 0;
+}
+
 static void bnx2x_init_vn_minmax(struct bnx2x *bp, int func)
 {
         struct rate_shaping_vars_per_vn m_rs_vn;
@@ -2383,6 +2429,8 @@ static void bnx2x_link_attn(struct bnx2x *bp)
 
 static void bnx2x__link_status_update(struct bnx2x *bp)
 {
+        int func = BP_FUNC(bp);
+
         if (bp->state != BNX2X_STATE_OPEN)
                 return;
 
@@ -2393,6 +2441,9 @@ static void bnx2x__link_status_update(struct bnx2x *bp)
         else
                 bnx2x_stats_handle(bp, STATS_EVENT_STOP);
 
+        bp->mf_config = SHMEM_RD(bp, mf_cfg.func_mf_config[func].config);
+        bnx2x_calc_vn_weight_sum(bp);
+
         /* indicate link status */
         bnx2x_link_report(bp);
 }
@@ -2421,6 +2472,152 @@ static void bnx2x_pmf_update(struct bnx2x *bp)
  * General service functions
  */
 
+/* send the MCP a request, block until there is a reply */
+u32 bnx2x_fw_command(struct bnx2x *bp, u32 command)
+{
+        int func = BP_FUNC(bp);
+        u32 seq = ++bp->fw_seq;
+        u32 rc = 0;
+        u32 cnt = 1;
+        u8 delay = CHIP_REV_IS_SLOW(bp) ? 100 : 10;
+
+        SHMEM_WR(bp, func_mb[func].drv_mb_header, (command | seq));
+        DP(BNX2X_MSG_MCP, "wrote command (%x) to FW MB\n", (command | seq));
+
+        do {
+                /* let the FW do it's magic ... */
+                msleep(delay);
+
+                rc = SHMEM_RD(bp, func_mb[func].fw_mb_header);
+
+                /* Give the FW up to 2 second (200*10ms) */
+        } while ((seq != (rc & FW_MSG_SEQ_NUMBER_MASK)) && (cnt++ < 200));
+
+        DP(BNX2X_MSG_MCP, "[after %d ms] read (%x) seq is (%x) from FW MB\n",
+           cnt*delay, rc, seq);
+
+        /* is this a reply to our command? */
+        if (seq == (rc & FW_MSG_SEQ_NUMBER_MASK))
+                rc &= FW_MSG_CODE_MASK;
+        else {
+                /* FW BUG! */
+                BNX2X_ERR("FW failed to respond!\n");
+                bnx2x_fw_dump(bp);
+                rc = 0;
+        }
+
+        return rc;
+}
+
+static void bnx2x_set_storm_rx_mode(struct bnx2x *bp);
+static void bnx2x_set_mac_addr_e1h(struct bnx2x *bp, int set);
+static void bnx2x_set_rx_mode(struct net_device *dev);
+
+static void bnx2x_e1h_disable(struct bnx2x *bp)
+{
+        int port = BP_PORT(bp);
+        int i;
+
+        bp->rx_mode = BNX2X_RX_MODE_NONE;
+        bnx2x_set_storm_rx_mode(bp);
+
+        netif_tx_disable(bp->dev);
+        bp->dev->trans_start = jiffies; /* prevent tx timeout */
+
+        REG_WR(bp, NIG_REG_LLH0_FUNC_EN + port*8, 0);
+
+        bnx2x_set_mac_addr_e1h(bp, 0);
+
+        for (i = 0; i < MC_HASH_SIZE; i++)
+                REG_WR(bp, MC_HASH_OFFSET(bp, i), 0);
+
+        netif_carrier_off(bp->dev);
+}
+
+static void bnx2x_e1h_enable(struct bnx2x *bp)
+{
+        int port = BP_PORT(bp);
+
+        REG_WR(bp, NIG_REG_LLH0_FUNC_EN + port*8, 1);
+
+        bnx2x_set_mac_addr_e1h(bp, 1);
+
+        /* Tx queue should be only reenabled */
+        netif_tx_wake_all_queues(bp->dev);
+
+        /* Initialize the receive filter. */
+        bnx2x_set_rx_mode(bp->dev);
+}
+
+static void bnx2x_update_min_max(struct bnx2x *bp)
+{
+        int port = BP_PORT(bp);
+        int vn, i;
+
+        /* Init rate shaping and fairness contexts */
+        bnx2x_init_port_minmax(bp);
+
+        bnx2x_calc_vn_weight_sum(bp);
+
+        for (vn = VN_0; vn < E1HVN_MAX; vn++)
+                bnx2x_init_vn_minmax(bp, 2*vn + port);
+
+        if (bp->port.pmf) {
+                int func;
+
+                /* Set the attention towards other drivers on the same port */
+                for (vn = VN_0; vn < E1HVN_MAX; vn++) {
+                        if (vn == BP_E1HVN(bp))
+                                continue;
+
+                        func = ((vn << 1) | port);
+                        REG_WR(bp, MISC_REG_AEU_GENERAL_ATTN_0 +
+                               (LINK_SYNC_ATTENTION_BIT_FUNC_0 + func)*4, 1);
+                }
+
+                /* Store it to internal memory */
+                for (i = 0; i < sizeof(struct cmng_struct_per_port) / 4; i++)
+                        REG_WR(bp, BAR_XSTRORM_INTMEM +
+                               XSTORM_CMNG_PER_PORT_VARS_OFFSET(port) + i*4,
+                               ((u32 *)(&bp->cmng))[i]);
+        }
+}
+
+static void bnx2x_dcc_event(struct bnx2x *bp, u32 dcc_event)
+{
+        int func = BP_FUNC(bp);
+
+        DP(BNX2X_MSG_MCP, "dcc_event 0x%x\n", dcc_event);
+        bp->mf_config = SHMEM_RD(bp, mf_cfg.func_mf_config[func].config);
+
+        if (dcc_event & DRV_STATUS_DCC_DISABLE_ENABLE_PF) {
+
+                if (bp->mf_config & FUNC_MF_CFG_FUNC_DISABLED) {
+                        DP(NETIF_MSG_IFDOWN, "mf_cfg function disabled\n");
+                        bp->state = BNX2X_STATE_DISABLED;
+
+                        bnx2x_e1h_disable(bp);
+                } else {
+                        DP(NETIF_MSG_IFUP, "mf_cfg function enabled\n");
+                        bp->state = BNX2X_STATE_OPEN;
+
+                        bnx2x_e1h_enable(bp);
+                }
+                dcc_event &= ~DRV_STATUS_DCC_DISABLE_ENABLE_PF;
+        }
+        if (dcc_event & DRV_STATUS_DCC_BANDWIDTH_ALLOCATION) {
+
+                bnx2x_update_min_max(bp);
+                dcc_event &= ~DRV_STATUS_DCC_BANDWIDTH_ALLOCATION;
+        }
+
+        /* Report results to MCP */
+        if (dcc_event)
+                bnx2x_fw_command(bp, DRV_MSG_CODE_DCC_FAILURE);
+        else
+                bnx2x_fw_command(bp, DRV_MSG_CODE_DCC_OK);
+}
+
 /* the slow path queue is odd since completions arrive on the fastpath ring */
 static int bnx2x_sp_post(struct bnx2x *bp, int command, int cid,
                          u32 data_hi, u32 data_lo, int common)
@@ -2806,9 +3003,12 @@ static inline void bnx2x_attn_int_deasserted3(struct bnx2x *bp, u32 attn)
                         int func = BP_FUNC(bp);
 
                         REG_WR(bp, MISC_REG_AEU_GENERAL_ATTN_12 + func*4, 0);
+                        val = SHMEM_RD(bp, func_mb[func].drv_status);
+                        if (val & DRV_STATUS_DCC_EVENT_MASK)
+                                bnx2x_dcc_event(bp,
+                                            (val & DRV_STATUS_DCC_EVENT_MASK));
                         bnx2x__link_status_update(bp);
-                        if (SHMEM_RD(bp, func_mb[func].drv_status) &
-                                                        DRV_STATUS_PMF)
+                        if ((bp->port.pmf == 0) && (val & DRV_STATUS_PMF))
                                 bnx2x_pmf_update(bp);
 
                 } else if (attn & BNX2X_MC_ASSERT_BITS) {
@@ -4968,47 +5168,6 @@ static void bnx2x_init_internal_port(struct bnx2x *bp)
         REG_WR(bp, BAR_XSTRORM_INTMEM + XSTORM_HC_BTR_OFFSET(port), BNX2X_BTR);
 }
 
-/* Calculates the sum of vn_min_rates.
-   It's needed for further normalizing of the min_rates.
-   Returns:
-     sum of vn_min_rates.
-       or
-     0 - if all the min_rates are 0.
-     In the later case fainess algorithm should be deactivated.
-     If not all min_rates are zero then those that are zeroes will be set to 1.
- */
-static void bnx2x_calc_vn_weight_sum(struct bnx2x *bp)
-{
-        int all_zero = 1;
-        int port = BP_PORT(bp);
-        int vn;
-
-        bp->vn_weight_sum = 0;
-        for (vn = VN_0; vn < E1HVN_MAX; vn++) {
-                int func = 2*vn + port;
-                u32 vn_cfg =
-                        SHMEM_RD(bp, mf_cfg.func_mf_config[func].config);
-                u32 vn_min_rate = ((vn_cfg & FUNC_MF_CFG_MIN_BW_MASK) >>
-                                   FUNC_MF_CFG_MIN_BW_SHIFT) * 100;
-
-                /* Skip hidden vns */
-                if (vn_cfg & FUNC_MF_CFG_FUNC_HIDE)
-                        continue;
-
-                /* If min rate is zero - set it to 1 */
-                if (!vn_min_rate)
-                        vn_min_rate = DEF_MIN_RATE;
-                else
-                        all_zero = 0;
-
-                bp->vn_weight_sum += vn_min_rate;
-        }
-
-        /* ... only if all min rates are zeros - disable fairness */
-        if (all_zero)
-                bp->vn_weight_sum = 0;
-}
-
 static void bnx2x_init_internal_func(struct bnx2x *bp)
 {
         struct tstorm_eth_function_common_config tstorm_config = {0};
@@ -6272,44 +6431,6 @@ init_hw_err:
         return rc;
 }
 
-/* send the MCP a request, block until there is a reply */
-u32 bnx2x_fw_command(struct bnx2x *bp, u32 command)
-{
-        int func = BP_FUNC(bp);
-        u32 seq = ++bp->fw_seq;
-        u32 rc = 0;
-        u32 cnt = 1;
-        u8 delay = CHIP_REV_IS_SLOW(bp) ? 100 : 10;
-
-        SHMEM_WR(bp, func_mb[func].drv_mb_header, (command | seq));
-        DP(BNX2X_MSG_MCP, "wrote command (%x) to FW MB\n", (command | seq));
-
-        do {
-                /* let the FW do it's magic ... */
-                msleep(delay);
-
-                rc = SHMEM_RD(bp, func_mb[func].fw_mb_header);
-
-                /* Give the FW up to 2 second (200*10ms) */
-        } while ((seq != (rc & FW_MSG_SEQ_NUMBER_MASK)) && (cnt++ < 200));
-
-        DP(BNX2X_MSG_MCP, "[after %d ms] read (%x) seq is (%x) from FW MB\n",
-           cnt*delay, rc, seq);
-
-        /* is this a reply to our command? */
-        if (seq == (rc & FW_MSG_SEQ_NUMBER_MASK)) {
-                rc &= FW_MSG_CODE_MASK;
-
-        } else {
-                /* FW BUG! */
-                BNX2X_ERR("FW failed to respond!\n");
-                bnx2x_fw_dump(bp);
-                rc = 0;
-        }
-
-        return rc;
-}
-
 static void bnx2x_free_mem(struct bnx2x *bp)
 {
 
@@ -6996,7 +7117,6 @@ static int bnx2x_set_int_mode(struct bnx2x *bp)
         return rc;
 }
 
-static void bnx2x_set_rx_mode(struct net_device *dev);
 
 /* must be called with rtnl_lock */
 static int bnx2x_nic_load(struct bnx2x *bp, int load_mode)
@@ -7103,6 +7223,12 @@ static int bnx2x_nic_load(struct bnx2x *bp, int load_mode)
         /* Setup NIC internals and enable interrupts */
         bnx2x_nic_init(bp, load_code);
 
+        if ((load_code == FW_MSG_CODE_DRV_LOAD_COMMON) &&
+            (bp->common.shmem2_base))
+                SHMEM2_WR(bp, dcc_support,
+                          (SHMEM_DCC_SUPPORT_DISABLE_ENABLE_PF_TLV |
+                           SHMEM_DCC_SUPPORT_BANDWIDTH_ALLOCATION_TLV));
+
         /* Send LOAD_DONE command to MCP */
         if (!BP_NOMCP(bp)) {
                 load_code = bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE);
@@ -7735,8 +7861,10 @@ static void __devinit bnx2x_get_common_hwinfo(struct bnx2x *bp)
                        bp->common.flash_size, bp->common.flash_size);
 
         bp->common.shmem_base = REG_RD(bp, MISC_REG_SHARED_MEM_ADDR);
+        bp->common.shmem2_base = REG_RD(bp, MISC_REG_GENERIC_CR_0);
         bp->link_params.shmem_base = bp->common.shmem_base;
-        BNX2X_DEV_INFO("shmem offset is 0x%x\n", bp->common.shmem_base);
+        BNX2X_DEV_INFO("shmem offset 0x%x  shmem2 offset 0x%x\n",
+                       bp->common.shmem_base, bp->common.shmem2_base);
 
         if (!bp->common.shmem_base ||
             (bp->common.shmem_base < 0xA0000) ||
@@ -8290,22 +8418,33 @@ static int __devinit bnx2x_get_hwinfo(struct bnx2x *bp)
                 bp->mf_config =
                         SHMEM_RD(bp, mf_cfg.func_mf_config[func].config);
 
-                val = (SHMEM_RD(bp, mf_cfg.func_mf_config[func].e1hov_tag) &
+                val = (SHMEM_RD(bp, mf_cfg.func_mf_config[FUNC_0].e1hov_tag) &
                        FUNC_MF_CFG_E1HOV_TAG_MASK);
-                if (val != FUNC_MF_CFG_E1HOV_TAG_DEFAULT) {
-
-                        bp->e1hov = val;
+                if (val != FUNC_MF_CFG_E1HOV_TAG_DEFAULT)
                         bp->e1hmf = 1;
-                        BNX2X_DEV_INFO("MF mode  E1HOV for func %d is %d "
-                                       "(0x%04x)\n",
-                                       func, bp->e1hov, bp->e1hov);
-                } else {
-                        BNX2X_DEV_INFO("single function mode\n");
-                        if (BP_E1HVN(bp)) {
+                BNX2X_DEV_INFO("%s function mode\n",
+                               IS_E1HMF(bp) ? "multi" : "single");
+
+                if (IS_E1HMF(bp)) {
+                        val = (SHMEM_RD(bp, mf_cfg.func_mf_config[func].
+                                                                e1hov_tag) &
+                               FUNC_MF_CFG_E1HOV_TAG_MASK);
+                        if (val != FUNC_MF_CFG_E1HOV_TAG_DEFAULT) {
+                                bp->e1hov = val;
+                                BNX2X_DEV_INFO("E1HOV for func %d is %d "
+                                               "(0x%04x)\n",
+                                               func, bp->e1hov, bp->e1hov);
+                        } else {
                                 BNX2X_ERR("!!!  No valid E1HOV for func %d,"
                                           "  aborting\n", func);
                                 rc = -EPERM;
                         }
+                } else {
+                        if (BP_E1HVN(bp)) {
+                                BNX2X_ERR("!!!  VN %d in single function mode,"
+                                          "  aborting\n", BP_E1HVN(bp));
+                                rc = -EPERM;
+                        }
                 }
         }