[SCSI] bfa: IOC changes: Support faster recovery and split bfa_ioc.c into ASIC specific code.

Add support for faster IOC recovery after failure.

Split bfa_ioc.c into three files:
  bfa_ioc.c:    Common code shared between crossbow and catapult ASIC's.

  bfa_ioc_cb.c: Code specific to the crossbow, reg mapping and
                interrupt related routines.

  bfa_ioc_ct.c: Code specific to the catapult, reg mapping and
                interrupt related routines.

Fix to make sure IOC reinitialize's properly on enable request -
update the ioc_fwstate reg with BFI_IOC_FAIL on ioc disable mbox cmd
timeout.

Makefile changes to support the 2 newly added files bfa_ioc_cb.c and
bfa_ioc_ct.c.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 273 insertions, 0 deletions

diff --git a/drivers/scsi/bfa/bfa_ioc_cb.c b/drivers/scsi/bfa/bfa_ioc_cb.c
new file mode 100644
index 000000000000..d1d625bcd721
--- /dev/null
+++ b/drivers/scsi/bfa/bfa_ioc_cb.c
@@ -0,0 +1,273 @@
+/*
+ * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
+ * All rights reserved
+ * www.brocade.com
+ *
+ * Linux driver for Brocade Fibre Channel Host Bus Adapter.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License (GPL) Version 2 as
+ * published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <bfa.h>
+#include <bfa_ioc.h>
+#include <bfa_fwimg_priv.h>
+#include <cna/bfa_cna_trcmod.h>
+#include <cs/bfa_debug.h>
+#include <bfi/bfi_ioc.h>
+#include <bfi/bfi_cbreg.h>
+#include <log/bfa_log_hal.h>
+#include <defs/bfa_defs_pci.h>
+
+BFA_TRC_FILE(CNA, IOC_CB);
+
+/*
+ * forward declarations
+ */
+static bfa_status_t bfa_ioc_cb_pll_init(struct bfa_ioc_s *ioc);
+static bfa_boolean_t bfa_ioc_cb_firmware_lock(struct bfa_ioc_s *ioc);
+static void bfa_ioc_cb_firmware_unlock(struct bfa_ioc_s *ioc);
+static u32  *bfa_ioc_cb_fwimg_get_chunk(struct bfa_ioc_s *ioc, u32 off);
+static u32 bfa_ioc_cb_fwimg_get_size(struct bfa_ioc_s *ioc);
+static void bfa_ioc_cb_reg_init(struct bfa_ioc_s *ioc);
+static void bfa_ioc_cb_map_port(struct bfa_ioc_s *ioc);
+static void bfa_ioc_cb_isr_mode_set(struct bfa_ioc_s *ioc, bfa_boolean_t msix);
+static void bfa_ioc_cb_notify_hbfail(struct bfa_ioc_s *ioc);
+static void bfa_ioc_cb_ownership_reset(struct bfa_ioc_s *ioc);
+
+struct bfa_ioc_hwif_s hwif_cb = {
+	bfa_ioc_cb_pll_init,
+	bfa_ioc_cb_firmware_lock,
+	bfa_ioc_cb_firmware_unlock,
+	bfa_ioc_cb_fwimg_get_chunk,
+	bfa_ioc_cb_fwimg_get_size,
+	bfa_ioc_cb_reg_init,
+	bfa_ioc_cb_map_port,
+	bfa_ioc_cb_isr_mode_set,
+	bfa_ioc_cb_notify_hbfail,
+	bfa_ioc_cb_ownership_reset,
+};
+
+/**
+ * Called from bfa_ioc_attach() to map asic specific calls.
+ */
+void
+bfa_ioc_set_cb_hwif(struct bfa_ioc_s *ioc)
+{
+	ioc->ioc_hwif = &hwif_cb;
+}
+
+static uint32_t *
+bfa_ioc_cb_fwimg_get_chunk(struct bfa_ioc_s *ioc, uint32_t off)
+{
+	return bfi_image_cb_get_chunk(off);
+}
+
+static uint32_t
+bfa_ioc_cb_fwimg_get_size(struct bfa_ioc_s *ioc)
+{
+	return bfi_image_cb_size;
+}
+
+/**
+ * Return true if firmware of current driver matches the running firmware.
+ */
+static bfa_boolean_t
+bfa_ioc_cb_firmware_lock(struct bfa_ioc_s *ioc)
+{
+	return BFA_TRUE;
+}
+
+static void
+bfa_ioc_cb_firmware_unlock(struct bfa_ioc_s *ioc)
+{
+}
+
+/**
+ * Notify other functions on HB failure.
+ */
+static void
+bfa_ioc_cb_notify_hbfail(struct bfa_ioc_s *ioc)
+{
+	bfa_reg_write(ioc->ioc_regs.err_set, __PSS_ERR_STATUS_SET);
+	bfa_reg_read(ioc->ioc_regs.err_set);
+}
+
+/**
+ * Host to LPU mailbox message addresses
+ */
+static struct { uint32_t hfn_mbox, lpu_mbox, hfn_pgn; } iocreg_fnreg[] = {
+	{ HOSTFN0_LPU_MBOX0_0, LPU_HOSTFN0_MBOX0_0, HOST_PAGE_NUM_FN0 },
+	{ HOSTFN1_LPU_MBOX0_8, LPU_HOSTFN1_MBOX0_8, HOST_PAGE_NUM_FN1 }
+};
+
+/**
+ * Host <-> LPU mailbox command/status registers
+ */
+static struct { uint32_t hfn, lpu; } iocreg_mbcmd[] = {
+	{ HOSTFN0_LPU0_CMD_STAT, LPU0_HOSTFN0_CMD_STAT },
+	{ HOSTFN1_LPU1_CMD_STAT, LPU1_HOSTFN1_CMD_STAT }
+};
+
+static void
+bfa_ioc_cb_reg_init(struct bfa_ioc_s *ioc)
+{
+	bfa_os_addr_t	rb;
+	int		pcifn = bfa_ioc_pcifn(ioc);
+
+	rb = bfa_ioc_bar0(ioc);
+
+	ioc->ioc_regs.hfn_mbox = rb + iocreg_fnreg[pcifn].hfn_mbox;
+	ioc->ioc_regs.lpu_mbox = rb + iocreg_fnreg[pcifn].lpu_mbox;
+	ioc->ioc_regs.host_page_num_fn = rb + iocreg_fnreg[pcifn].hfn_pgn;
+
+	if (ioc->port_id == 0) {
+		ioc->ioc_regs.heartbeat = rb + BFA_IOC0_HBEAT_REG;
+		ioc->ioc_regs.ioc_fwstate = rb + BFA_IOC0_STATE_REG;
+	} else {
+		ioc->ioc_regs.heartbeat = (rb + BFA_IOC1_HBEAT_REG);
+		ioc->ioc_regs.ioc_fwstate = (rb + BFA_IOC1_STATE_REG);
+	}
+
+	/**
+	 * Host <-> LPU mailbox command/status registers
+	 */
+	ioc->ioc_regs.hfn_mbox_cmd = rb + iocreg_mbcmd[pcifn].hfn;
+	ioc->ioc_regs.lpu_mbox_cmd = rb + iocreg_mbcmd[pcifn].lpu;
+
+	/*
+	 * PSS control registers
+	 */
+	ioc->ioc_regs.pss_ctl_reg = (rb + PSS_CTL_REG);
+	ioc->ioc_regs.app_pll_fast_ctl_reg = (rb + APP_PLL_400_CTL_REG);
+	ioc->ioc_regs.app_pll_slow_ctl_reg = (rb + APP_PLL_212_CTL_REG);
+
+	/*
+	 * IOC semaphore registers and serialization
+	 */
+	ioc->ioc_regs.ioc_sem_reg = (rb + HOST_SEM0_REG);
+	ioc->ioc_regs.ioc_init_sem_reg = (rb + HOST_SEM2_REG);
+
+	/**
+	 * sram memory access
+	 */
+	ioc->ioc_regs.smem_page_start = (rb + PSS_SMEM_PAGE_START);
+	ioc->ioc_regs.smem_pg0 = BFI_IOC_SMEM_PG0_CB;
+
+	/*
+	 * err set reg : for notification of hb failure
+	 */
+	ioc->ioc_regs.err_set = (rb + ERR_SET_REG);
+}
+
+/**
+ * Initialize IOC to port mapping.
+ */
+static void
+bfa_ioc_cb_map_port(struct bfa_ioc_s *ioc)
+{
+	/**
+	 * For crossbow, port id is same as pci function.
+	 */
+	ioc->port_id = bfa_ioc_pcifn(ioc);
+	bfa_trc(ioc, ioc->port_id);
+}
+
+/**
+ * Set interrupt mode for a function: INTX or MSIX
+ */
+static void
+bfa_ioc_cb_isr_mode_set(struct bfa_ioc_s *ioc, bfa_boolean_t msix)
+{
+}
+
+static bfa_status_t
+bfa_ioc_cb_pll_init(struct bfa_ioc_s *ioc)
+{
+	bfa_os_addr_t	rb = ioc->pcidev.pci_bar_kva;
+	uint32_t	pll_sclk, pll_fclk;
+
+	/*
+	 *  Hold semaphore so that nobody can access the chip during init.
+	 */
+	bfa_ioc_sem_get(ioc->ioc_regs.ioc_init_sem_reg);
+
+	pll_sclk = __APP_PLL_212_ENABLE | __APP_PLL_212_LRESETN |
+			__APP_PLL_212_P0_1(3U) |
+			__APP_PLL_212_JITLMT0_1(3U) |
+			__APP_PLL_212_CNTLMT0_1(3U);
+	pll_fclk = __APP_PLL_400_ENABLE | __APP_PLL_400_LRESETN |
+			__APP_PLL_400_RSEL200500 | __APP_PLL_400_P0_1(3U) |
+			__APP_PLL_400_JITLMT0_1(3U) |
+			__APP_PLL_400_CNTLMT0_1(3U);
+
+	bfa_reg_write((rb + BFA_IOC0_STATE_REG), BFI_IOC_UNINIT);
+	bfa_reg_write((rb + BFA_IOC1_STATE_REG), BFI_IOC_UNINIT);
+
+	bfa_reg_write((rb + HOSTFN0_INT_MSK), 0xffffffffU);
+	bfa_reg_write((rb + HOSTFN1_INT_MSK), 0xffffffffU);
+	bfa_reg_write((rb + HOSTFN0_INT_STATUS), 0xffffffffU);
+	bfa_reg_write((rb + HOSTFN1_INT_STATUS), 0xffffffffU);
+	bfa_reg_write((rb + HOSTFN0_INT_MSK), 0xffffffffU);
+	bfa_reg_write((rb + HOSTFN1_INT_MSK), 0xffffffffU);
+
+	bfa_reg_write(ioc->ioc_regs.app_pll_slow_ctl_reg,
+			__APP_PLL_212_LOGIC_SOFT_RESET);
+	bfa_reg_write(ioc->ioc_regs.app_pll_slow_ctl_reg,
+			__APP_PLL_212_BYPASS |
+			__APP_PLL_212_LOGIC_SOFT_RESET);
+	bfa_reg_write(ioc->ioc_regs.app_pll_fast_ctl_reg,
+			__APP_PLL_400_LOGIC_SOFT_RESET);
+	bfa_reg_write(ioc->ioc_regs.app_pll_fast_ctl_reg,
+			__APP_PLL_400_BYPASS |
+			__APP_PLL_400_LOGIC_SOFT_RESET);
+	bfa_os_udelay(2);
+	bfa_reg_write(ioc->ioc_regs.app_pll_slow_ctl_reg,
+			__APP_PLL_212_LOGIC_SOFT_RESET);
+	bfa_reg_write(ioc->ioc_regs.app_pll_fast_ctl_reg,
+			__APP_PLL_400_LOGIC_SOFT_RESET);
+
+	bfa_reg_write(ioc->ioc_regs.app_pll_slow_ctl_reg,
+			pll_sclk | __APP_PLL_212_LOGIC_SOFT_RESET);
+	bfa_reg_write(ioc->ioc_regs.app_pll_fast_ctl_reg,
+			pll_fclk | __APP_PLL_400_LOGIC_SOFT_RESET);
+
+	/**
+	 * Wait for PLLs to lock.
+	 */
+	bfa_os_udelay(2000);
+	bfa_reg_write((rb + HOSTFN0_INT_STATUS), 0xffffffffU);
+	bfa_reg_write((rb + HOSTFN1_INT_STATUS), 0xffffffffU);
+
+	bfa_reg_write(ioc->ioc_regs.app_pll_slow_ctl_reg, pll_sclk);
+	bfa_reg_write(ioc->ioc_regs.app_pll_fast_ctl_reg, pll_fclk);
+
+	/*
+	 *  release semaphore.
+	 */
+	bfa_ioc_sem_release(ioc->ioc_regs.ioc_init_sem_reg);
+
+	return BFA_STATUS_OK;
+}
+
+/**
+ * Cleanup hw semaphore and usecnt registers
+ */
+static void
+bfa_ioc_cb_ownership_reset(struct bfa_ioc_s *ioc)
+{
+
+	/*
+	 * Read the hw sem reg to make sure that it is locked
+	 * before we clear it. If it is not locked, writing 1
+	 * will lock it instead of clearing it.
+	 */
+	bfa_reg_read(ioc->ioc_regs.ioc_sem_reg);
+	bfa_ioc_hw_sem_release(ioc);
+}