enic: driver/firmware API updates

Add driver/firmware compatibility check.
Update firmware notify cmd to honor notify area size.
Add new version of init cmd.
Add link_down_cnt to notify area to track link down count.

Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/enic/vnic_dev.c b/drivers/net/enic/vnic_dev.c
index 9afd33c..08a37b0 100644 (file)
--- a/drivers/net/enic/vnic_dev.c
+++ b/drivers/net/enic/vnic_dev.c
@@ -43,6 +43,7 @@ struct vnic_dev {
        struct vnic_devcmd_notify *notify;
        struct vnic_devcmd_notify notify_copy;
        dma_addr_t notify_pa;
+       u32 notify_sz;
        u32 *linkstatus;
        dma_addr_t linkstatus_pa;
        struct vnic_stats *stats;
@@ -235,14 +236,6 @@ int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
        struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
        int delay;
        u32 status;
-       int dev_cmd_err[] = {
-               /* convert from fw's version of error.h to host's version */
-               0,      /* ERR_SUCCESS */
-               EINVAL, /* ERR_EINVAL */
-               EFAULT, /* ERR_EFAULT */
-               EPERM,  /* ERR_EPERM */
-               EBUSY,  /* ERR_EBUSY */
-       };
        int err;
 
        status = ioread32(&devcmd->status);
@@ -270,10 +263,12 @@ int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
                if (!(status & STAT_BUSY)) {
 
                        if (status & STAT_ERROR) {
-                               err = dev_cmd_err[(int)readq(&devcmd->args[0])];
-                               printk(KERN_ERR "Error %d devcmd %d\n",
-                                       err, _CMD_N(cmd));
-                               return -err;
+                               err = (int)readq(&devcmd->args[0]);
+                               if (err != ERR_ECMDUNKNOWN ||
+                                   cmd != CMD_CAPABILITY)
+                                       printk(KERN_ERR "Error %d devcmd %d\n",
+                                               err, _CMD_N(cmd));
+                               return err;
                        }
 
                        if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
@@ -290,6 +285,17 @@ int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
        return -ETIMEDOUT;
 }
 
+int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd)
+{
+       u64 a0 = (u32)cmd, a1 = 0;
+       int wait = 1000;
+       int err;
+
+       err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
+
+       return !(err || a0);
+}
+
 int vnic_dev_fw_info(struct vnic_dev *vdev,
        struct vnic_devcmd_fw_info **fw_info)
 {
@@ -511,6 +517,7 @@ int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
 {
        u64 a0, a1;
        int wait = 1000;
+       int r;
 
        if (!vdev->notify) {
                vdev->notify = pci_alloc_consistent(vdev->pdev,
@@ -518,13 +525,16 @@ int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
                        &vdev->notify_pa);
                if (!vdev->notify)
                        return -ENOMEM;
+               memset(vdev->notify, 0, sizeof(struct vnic_devcmd_notify));
        }
 
        a0 = vdev->notify_pa;
        a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
        a1 += sizeof(struct vnic_devcmd_notify);
 
-       return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
+       r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
+       vdev->notify_sz = (r == 0) ? (u32)a1 : 0;
+       return r;
 }
 
 void vnic_dev_notify_unset(struct vnic_dev *vdev)
@@ -537,22 +547,22 @@ void vnic_dev_notify_unset(struct vnic_dev *vdev)
        a1 += sizeof(struct vnic_devcmd_notify);
 
        vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
+       vdev->notify_sz = 0;
 }
 
 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
 {
        u32 *words;
-       unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
+       unsigned int nwords = vdev->notify_sz / 4;
        unsigned int i;
        u32 csum;
 
-       if (!vdev->notify)
+       if (!vdev->notify || !vdev->notify_sz)
                return 0;
 
        do {
                csum = 0;
-               memcpy(&vdev->notify_copy, vdev->notify,
-                       sizeof(struct vnic_devcmd_notify));
+               memcpy(&vdev->notify_copy, vdev->notify, vdev->notify_sz);
                words = (u32 *)&vdev->notify_copy;
                for (i = 1; i < nwords; i++)
                        csum += words[i];
@@ -565,7 +575,20 @@ int vnic_dev_init(struct vnic_dev *vdev, int arg)
 {
        u64 a0 = (u32)arg, a1 = 0;
        int wait = 1000;
-       return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
+        int r = 0;
+
+       if (vnic_dev_capable(vdev, CMD_INIT))
+               r = vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
+       else {
+               vnic_dev_cmd(vdev, CMD_INIT_v1, &a0, &a1, wait);
+               if (a0 & CMD_INITF_DEFAULT_MAC) {
+                       // Emulate these for old CMD_INIT_v1 which
+                       // didn't pass a0 so no CMD_INITF_*.
+                       vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
+                       vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
+               }
+        }
+        return r;
 }
 
 int vnic_dev_link_status(struct vnic_dev *vdev)
@@ -666,3 +689,4 @@ err_out:
        return NULL;
 }
 
+

diff --git a/drivers/net/enic/vnic_devcmd.h b/drivers/net/enic/vnic_devcmd.h
index d8617a3..8062c75 100644 (file)
--- a/drivers/net/enic/vnic_devcmd.h
+++ b/drivers/net/enic/vnic_devcmd.h
@@ -168,7 +168,8 @@ enum vnic_devcmd_cmd {
        CMD_CLOSE               = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 25),
 
        /* initialize virtual link: (u32)a0=flags (see CMD_INITF_*) */
-       CMD_INIT                = _CMDCNW(_CMD_DIR_READ, _CMD_VTYPE_ALL, 26),
+/***** Replaced by CMD_INIT *****/
+       CMD_INIT_v1             = _CMDCNW(_CMD_DIR_READ, _CMD_VTYPE_ALL, 26),
 
        /* variant of CMD_INIT, with provisioning info
         *     (u64)a0=paddr of vnic_devcmd_provinfo
@@ -198,6 +199,14 @@ enum vnic_devcmd_cmd {
 
        /* undo initialize of virtual link */
        CMD_DEINIT              = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 34),
+
+       /* initialize virtual link: (u32)a0=flags (see CMD_INITF_*) */
+       CMD_INIT                = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 35),
+
+       /* check fw capability of a cmd:
+        * in:  (u32)a0=cmd
+        * out: (u32)a0=errno, 0:valid cmd, a1=supported VNIC_STF_* bits */
+       CMD_CAPABILITY          = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 36),
 };
 
 /* flags for CMD_OPEN */
@@ -249,8 +258,16 @@ struct vnic_devcmd_notify {
        u32 uif;                /* uplink interface */
        u32 status;             /* status bits (see VNIC_STF_*) */
        u32 error;              /* error code (see ERR_*) for first ERR */
+       u32 link_down_cnt;      /* running count of link down transitions */
 };
 #define VNIC_STF_FATAL_ERR     0x0001  /* fatal fw error */
+#define VNIC_STF_STD_PAUSE     0x0002  /* standard link-level pause on */
+#define VNIC_STF_PFC_PAUSE     0x0004  /* priority flow control pause on */
+/* all supported status flags */
+#define VNIC_STF_ALL           (VNIC_STF_FATAL_ERR |\
+                                VNIC_STF_STD_PAUSE |\
+                                VNIC_STF_PFC_PAUSE |\
+                                0)
 
 struct vnic_devcmd_provinfo {
        u8 oui[3];