i40e: init code and hardware support

This patch implements the hardware specific init and management.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
CC: PJ Waskiewicz <peter.p.waskiewicz.jr@intel.com>
CC: e1000-devel@lists.sourceforge.net
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 366 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e_hmc.c b/drivers/net/ethernet/intel/i40e/i40e_hmc.c
new file mode 100644
index 000000000000..901804af8b0e
--- /dev/null
+++ b/drivers/net/ethernet/intel/i40e/i40e_hmc.c
@@ -0,0 +1,366 @@
+/*******************************************************************************
+ *
+ * Intel Ethernet Controller XL710 Family Linux Driver
+ * Copyright(c) 2013 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Contact Information:
+ * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ ******************************************************************************/
+
+#include "i40e_osdep.h"
+#include "i40e_register.h"
+#include "i40e_status.h"
+#include "i40e_alloc.h"
+#include "i40e_hmc.h"
+#include "i40e_type.h"
+
+/**
+ * i40e_add_sd_table_entry - Adds a segment descriptor to the table
+ * @hw: pointer to our hw struct
+ * @hmc_info: pointer to the HMC configuration information struct
+ * @sd_index: segment descriptor index to manipulate
+ * @type: what type of segment descriptor we're manipulating
+ * @direct_mode_sz: size to alloc in direct mode
+ **/
+i40e_status i40e_add_sd_table_entry(struct i40e_hw *hw,
+					      struct i40e_hmc_info *hmc_info,
+					      u32 sd_index,
+					      enum i40e_sd_entry_type type,
+					      u64 direct_mode_sz)
+{
+	enum i40e_memory_type mem_type __attribute__((unused));
+	i40e_status ret_code = 0;
+	struct i40e_hmc_sd_entry *sd_entry;
+	bool dma_mem_alloc_done = false;
+	struct i40e_dma_mem mem;
+	u64 alloc_len;
+
+	if (NULL == hmc_info->sd_table.sd_entry) {
+		ret_code = I40E_ERR_BAD_PTR;
+		hw_dbg(hw, "i40e_add_sd_table_entry: bad sd_entry\n");
+		goto exit;
+	}
+
+	if (sd_index >= hmc_info->sd_table.sd_cnt) {
+		ret_code = I40E_ERR_INVALID_SD_INDEX;
+		hw_dbg(hw, "i40e_add_sd_table_entry: bad sd_index\n");
+		goto exit;
+	}
+
+	sd_entry = &hmc_info->sd_table.sd_entry[sd_index];
+	if (!sd_entry->valid) {
+		if (I40E_SD_TYPE_PAGED == type) {
+			mem_type = i40e_mem_pd;
+			alloc_len = I40E_HMC_PAGED_BP_SIZE;
+		} else {
+			mem_type = i40e_mem_bp_jumbo;
+			alloc_len = direct_mode_sz;
+		}
+
+		/* allocate a 4K pd page or 2M backing page */
+		ret_code = i40e_allocate_dma_mem(hw, &mem, mem_type, alloc_len,
+						 I40E_HMC_PD_BP_BUF_ALIGNMENT);
+		if (ret_code)
+			goto exit;
+		dma_mem_alloc_done = true;
+		if (I40E_SD_TYPE_PAGED == type) {
+			ret_code = i40e_allocate_virt_mem(hw,
+					&sd_entry->u.pd_table.pd_entry_virt_mem,
+					sizeof(struct i40e_hmc_pd_entry) * 512);
+			if (ret_code)
+				goto exit;
+			sd_entry->u.pd_table.pd_entry =
+				(struct i40e_hmc_pd_entry *)
+				sd_entry->u.pd_table.pd_entry_virt_mem.va;
+			memcpy(&sd_entry->u.pd_table.pd_page_addr, &mem,
+			       sizeof(struct i40e_dma_mem));
+		} else {
+			memcpy(&sd_entry->u.bp.addr, &mem,
+			       sizeof(struct i40e_dma_mem));
+			sd_entry->u.bp.sd_pd_index = sd_index;
+		}
+		/* initialize the sd entry */
+		hmc_info->sd_table.sd_entry[sd_index].entry_type = type;
+
+		/* increment the ref count */
+		I40E_INC_SD_REFCNT(&hmc_info->sd_table);
+	}
+	/* Increment backing page reference count */
+	if (I40E_SD_TYPE_DIRECT == sd_entry->entry_type)
+		I40E_INC_BP_REFCNT(&sd_entry->u.bp);
+exit:
+	if (ret_code)
+		if (dma_mem_alloc_done)
+			i40e_free_dma_mem(hw, &mem);
+
+	return ret_code;
+}
+
+/**
+ * i40e_add_pd_table_entry - Adds page descriptor to the specified table
+ * @hw: pointer to our HW structure
+ * @hmc_info: pointer to the HMC configuration information structure
+ * @pd_index: which page descriptor index to manipulate
+ *
+ * This function:
+ *	1. Initializes the pd entry
+ *	2. Adds pd_entry in the pd_table
+ *	3. Mark the entry valid in i40e_hmc_pd_entry structure
+ *	4. Initializes the pd_entry's ref count to 1
+ * assumptions:
+ *	1. The memory for pd should be pinned down, physically contiguous and
+ *	   aligned on 4K boundary and zeroed memory.
+ *	2. It should be 4K in size.
+ **/
+i40e_status i40e_add_pd_table_entry(struct i40e_hw *hw,
+					      struct i40e_hmc_info *hmc_info,
+					      u32 pd_index)
+{
+	i40e_status ret_code = 0;
+	struct i40e_hmc_pd_table *pd_table;
+	struct i40e_hmc_pd_entry *pd_entry;
+	struct i40e_dma_mem mem;
+	u32 sd_idx, rel_pd_idx;
+	u64 *pd_addr;
+	u64 page_desc;
+
+	if (pd_index / I40E_HMC_PD_CNT_IN_SD >= hmc_info->sd_table.sd_cnt) {
+		ret_code = I40E_ERR_INVALID_PAGE_DESC_INDEX;
+		hw_dbg(hw, "i40e_add_pd_table_entry: bad pd_index\n");
+		goto exit;
+	}
+
+	/* find corresponding sd */
+	sd_idx = (pd_index / I40E_HMC_PD_CNT_IN_SD);
+	if (I40E_SD_TYPE_PAGED !=
+	    hmc_info->sd_table.sd_entry[sd_idx].entry_type)
+		goto exit;
+
+	rel_pd_idx = (pd_index % I40E_HMC_PD_CNT_IN_SD);
+	pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table;
+	pd_entry = &pd_table->pd_entry[rel_pd_idx];
+	if (!pd_entry->valid) {
+		/* allocate a 4K backing page */
+		ret_code = i40e_allocate_dma_mem(hw, &mem, i40e_mem_bp,
+						 I40E_HMC_PAGED_BP_SIZE,
+						 I40E_HMC_PD_BP_BUF_ALIGNMENT);
+		if (ret_code)
+			goto exit;
+
+		memcpy(&pd_entry->bp.addr, &mem, sizeof(struct i40e_dma_mem));
+		pd_entry->bp.sd_pd_index = pd_index;
+		pd_entry->bp.entry_type = I40E_SD_TYPE_PAGED;
+		/* Set page address and valid bit */
+		page_desc = mem.pa | 0x1;
+
+		pd_addr = (u64 *)pd_table->pd_page_addr.va;
+		pd_addr += rel_pd_idx;
+
+		/* Add the backing page physical address in the pd entry */
+		memcpy(pd_addr, &page_desc, sizeof(u64));
+
+		pd_entry->sd_index = sd_idx;
+		pd_entry->valid = true;
+		I40E_INC_PD_REFCNT(pd_table);
+	}
+	I40E_INC_BP_REFCNT(&pd_entry->bp);
+exit:
+	return ret_code;
+}
+
+/**
+ * i40e_remove_pd_bp - remove a backing page from a page descriptor
+ * @hw: pointer to our HW structure
+ * @hmc_info: pointer to the HMC configuration information structure
+ * @idx: the page index
+ * @is_pf: distinguishes a VF from a PF
+ *
+ * This function:
+ *	1. Marks the entry in pd tabe (for paged address mode) or in sd table
+ *	   (for direct address mode) invalid.
+ *	2. Write to register PMPDINV to invalidate the backing page in FV cache
+ *	3. Decrement the ref count for the pd _entry
+ * assumptions:
+ *	1. Caller can deallocate the memory used by backing storage after this
+ *	   function returns.
+ **/
+i40e_status i40e_remove_pd_bp(struct i40e_hw *hw,
+					struct i40e_hmc_info *hmc_info,
+					u32 idx, bool is_pf)
+{
+	i40e_status ret_code = 0;
+	struct i40e_hmc_pd_entry *pd_entry;
+	struct i40e_hmc_pd_table *pd_table;
+	struct i40e_hmc_sd_entry *sd_entry;
+	u32 sd_idx, rel_pd_idx;
+	u64 *pd_addr;
+
+	/* calculate index */
+	sd_idx = idx / I40E_HMC_PD_CNT_IN_SD;
+	rel_pd_idx = idx % I40E_HMC_PD_CNT_IN_SD;
+	if (sd_idx >= hmc_info->sd_table.sd_cnt) {
+		ret_code = I40E_ERR_INVALID_PAGE_DESC_INDEX;
+		hw_dbg(hw, "i40e_remove_pd_bp: bad idx\n");
+		goto exit;
+	}
+	sd_entry = &hmc_info->sd_table.sd_entry[sd_idx];
+	if (I40E_SD_TYPE_PAGED != sd_entry->entry_type) {
+		ret_code = I40E_ERR_INVALID_SD_TYPE;
+		hw_dbg(hw, "i40e_remove_pd_bp: wrong sd_entry type\n");
+		goto exit;
+	}
+	/* get the entry and decrease its ref counter */
+	pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table;
+	pd_entry = &pd_table->pd_entry[rel_pd_idx];
+	I40E_DEC_BP_REFCNT(&pd_entry->bp);
+	if (pd_entry->bp.ref_cnt)
+		goto exit;
+
+	/* mark the entry invalid */
+	pd_entry->valid = false;
+	I40E_DEC_PD_REFCNT(pd_table);
+	pd_addr = (u64 *)pd_table->pd_page_addr.va;
+	pd_addr += rel_pd_idx;
+	memset(pd_addr, 0, sizeof(u64));
+	if (is_pf)
+		I40E_INVALIDATE_PF_HMC_PD(hw, sd_idx, idx);
+	else
+		I40E_INVALIDATE_VF_HMC_PD(hw, sd_idx, idx, hmc_info->hmc_fn_id);
+
+	/* free memory here */
+	ret_code = i40e_free_dma_mem(hw, &(pd_entry->bp.addr));
+	if (ret_code)
+		goto exit;
+	if (!pd_table->ref_cnt)
+		i40e_free_virt_mem(hw, &pd_table->pd_entry_virt_mem);
+exit:
+	return ret_code;
+}
+
+/**
+ * i40e_prep_remove_sd_bp - Prepares to remove a backing page from a sd entry
+ * @hmc_info: pointer to the HMC configuration information structure
+ * @idx: the page index
+ **/
+i40e_status i40e_prep_remove_sd_bp(struct i40e_hmc_info *hmc_info,
+					     u32 idx)
+{
+	i40e_status ret_code = 0;
+	struct i40e_hmc_sd_entry *sd_entry;
+
+	/* get the entry and decrease its ref counter */
+	sd_entry = &hmc_info->sd_table.sd_entry[idx];
+	I40E_DEC_BP_REFCNT(&sd_entry->u.bp);
+	if (sd_entry->u.bp.ref_cnt) {
+		ret_code = I40E_ERR_NOT_READY;
+		goto exit;
+	}
+	I40E_DEC_SD_REFCNT(&hmc_info->sd_table);
+
+	/* mark the entry invalid */
+	sd_entry->valid = false;
+exit:
+	return ret_code;
+}
+
+/**
+ * i40e_remove_sd_bp_new - Removes a backing page from a segment descriptor
+ * @hw: pointer to our hw struct
+ * @hmc_info: pointer to the HMC configuration information structure
+ * @idx: the page index
+ * @is_pf: used to distinguish between VF and PF
+ **/
+i40e_status i40e_remove_sd_bp_new(struct i40e_hw *hw,
+					    struct i40e_hmc_info *hmc_info,
+					    u32 idx, bool is_pf)
+{
+	struct i40e_hmc_sd_entry *sd_entry;
+	i40e_status ret_code = 0;
+
+	/* get the entry and decrease its ref counter */
+	sd_entry = &hmc_info->sd_table.sd_entry[idx];
+	if (is_pf) {
+		I40E_CLEAR_PF_SD_ENTRY(hw, idx, I40E_SD_TYPE_DIRECT);
+	} else {
+		ret_code = I40E_NOT_SUPPORTED;
+		goto exit;
+	}
+	ret_code = i40e_free_dma_mem(hw, &(sd_entry->u.bp.addr));
+	if (ret_code)
+		goto exit;
+exit:
+	return ret_code;
+}
+
+/**
+ * i40e_prep_remove_pd_page - Prepares to remove a PD page from sd entry.
+ * @hmc_info: pointer to the HMC configuration information structure
+ * @idx: segment descriptor index to find the relevant page descriptor
+ **/
+i40e_status i40e_prep_remove_pd_page(struct i40e_hmc_info *hmc_info,
+					       u32 idx)
+{
+	i40e_status ret_code = 0;
+	struct i40e_hmc_sd_entry *sd_entry;
+
+	sd_entry = &hmc_info->sd_table.sd_entry[idx];
+
+	if (sd_entry->u.pd_table.ref_cnt) {
+		ret_code = I40E_ERR_NOT_READY;
+		goto exit;
+	}
+
+	/* mark the entry invalid */
+	sd_entry->valid = false;
+
+	I40E_DEC_SD_REFCNT(&hmc_info->sd_table);
+exit:
+	return ret_code;
+}
+
+/**
+ * i40e_remove_pd_page_new - Removes a PD page from sd entry.
+ * @hw: pointer to our hw struct
+ * @hmc_info: pointer to the HMC configuration information structure
+ * @idx: segment descriptor index to find the relevant page descriptor
+ * @is_pf: used to distinguish between VF and PF
+ **/
+i40e_status i40e_remove_pd_page_new(struct i40e_hw *hw,
+					      struct i40e_hmc_info *hmc_info,
+					      u32 idx, bool is_pf)
+{
+	i40e_status ret_code = 0;
+	struct i40e_hmc_sd_entry *sd_entry;
+
+	sd_entry = &hmc_info->sd_table.sd_entry[idx];
+	if (is_pf) {
+		I40E_CLEAR_PF_SD_ENTRY(hw, idx, I40E_SD_TYPE_PAGED);
+	} else {
+		ret_code = I40E_NOT_SUPPORTED;
+		goto exit;
+	}
+	/* free memory here */
+	ret_code = i40e_free_dma_mem(hw, &(sd_entry->u.pd_table.pd_page_addr));
+	if (ret_code)
+		goto exit;
+exit:
+	return ret_code;
+}