[PATCH v3 03/22] fjes: Hardware cleanup routine

[Taku Izumi]

This patch adds hardware cleanup routine to be
invoked at driver's .remove routine.

Signed-off-by: Taku Izumi <izumi.t...@jp.fujitsu.com>
---
 drivers/net/fjes/fjes_hw.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++
 drivers/net/fjes/fjes_hw.h |  1 +
 2 files changed, 67 insertions(+)

diff --git a/drivers/net/fjes/fjes_hw.c b/drivers/net/fjes/fjes_hw.c
index ae26638..757cece 100644
--- a/drivers/net/fjes/fjes_hw.c
+++ b/drivers/net/fjes/fjes_hw.c
@@ -56,6 +56,12 @@ static u8 *fjes_hw_iomap(struct fjes_hw *hw)
        return base;
 }
 
+static void fjes_hw_iounmap(struct fjes_hw *hw)
+{
+       iounmap(hw->base);
+       release_mem_region(hw->hw_res.start, hw->hw_res.size);
+}
+
 int fjes_hw_reset(struct fjes_hw *hw)
 {
        union REG_DCTL dctl;
@@ -109,6 +115,12 @@ static int fjes_hw_alloc_shared_status_region(struct 
fjes_hw *hw)
        return 0;
 }
 
+static void fjes_hw_free_shared_status_region(struct fjes_hw *hw)
+{
+       kfree(hw->hw_info.share);
+       hw->hw_info.share = NULL;
+}
+
 static int fjes_hw_alloc_epbuf(struct epbuf_handler *epbh)
 {
        void *mem;
@@ -126,6 +138,18 @@ static int fjes_hw_alloc_epbuf(struct epbuf_handler *epbh)
        return 0;
 }
 
+static void fjes_hw_free_epbuf(struct epbuf_handler *epbh)
+{
+       if (epbh->buffer)
+               vfree(epbh->buffer);
+
+       epbh->buffer = NULL;
+       epbh->size = 0;
+
+       epbh->info = NULL;
+       epbh->ring = NULL;
+}
+
 void fjes_hw_setup_epbuf(struct epbuf_handler *epbh, u8 *mac_addr, u32 mtu)
 {
        union ep_buffer_info *info = epbh->info;
@@ -258,6 +282,32 @@ static int fjes_hw_setup(struct fjes_hw *hw)
        return 0;
 }
 
+static void fjes_hw_cleanup(struct fjes_hw *hw)
+{
+       int epidx;
+
+       if (!hw->ep_shm_info)
+               return;
+
+       fjes_hw_free_shared_status_region(hw);
+
+       kfree(hw->hw_info.req_buf);
+       hw->hw_info.req_buf = NULL;
+
+       kfree(hw->hw_info.res_buf);
+       hw->hw_info.res_buf = NULL;
+
+       for (epidx = 0; epidx < hw->max_epid ; epidx++) {
+               if (epidx == hw->my_epid)
+                       continue;
+               fjes_hw_free_epbuf(&hw->ep_shm_info[epidx].tx);
+               fjes_hw_free_epbuf(&hw->ep_shm_info[epidx].rx);
+       }
+
+       kfree(hw->ep_shm_info);
+       hw->ep_shm_info = NULL;
+}
+
 int fjes_hw_init(struct fjes_hw *hw)
 {
        int ret;
@@ -285,6 +335,22 @@ int fjes_hw_init(struct fjes_hw *hw)
        return ret;
 }
 
+void fjes_hw_exit(struct fjes_hw *hw)
+{
+       int ret;
+
+       if (hw->base) {
+               ret = fjes_hw_reset(hw);
+               if (ret)
+                       pr_err("%s: reset error", __func__);
+
+               fjes_hw_iounmap(hw);
+               hw->base = NULL;
+       }
+
+       fjes_hw_cleanup(hw);
+}
+
 void fjes_hw_set_irqmask(struct fjes_hw *hw,
                         enum REG_ICTL_MASK intr_mask, bool mask)
 {
diff --git a/drivers/net/fjes/fjes_hw.h b/drivers/net/fjes/fjes_hw.h
index 836ebe2..1b3e9ca 100644
--- a/drivers/net/fjes/fjes_hw.h
+++ b/drivers/net/fjes/fjes_hw.h
@@ -241,6 +241,7 @@ struct fjes_hw {
 };
 
 int fjes_hw_init(struct fjes_hw *);
+void fjes_hw_exit(struct fjes_hw *);
 int fjes_hw_reset(struct fjes_hw *);
 
 void fjes_hw_init_command_registers(struct fjes_hw *,
-- 
1.8.3.1

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