From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753332AbbJTPep (ORCPT ); Tue, 20 Oct 2015 11:34:45 -0400 Received: from 8bytes.org ([81.169.241.247]:44836 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752134AbbJTPdw (ORCPT ); Tue, 20 Oct 2015 11:33:52 -0400 From: Joerg Roedel To: iommu@lists.linux-foundation.org Cc: linux-kernel@vger.kernel.org, Joerg Roedel Subject: [PATCH 08/12] iommu/amd: Remove cmd_buf_size and evt_buf_size from struct amd_iommu Date: Tue, 20 Oct 2015 17:33:41 +0200 Message-Id: <1445355225-17557-9-git-send-email-joro@8bytes.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1445355225-17557-1-git-send-email-joro@8bytes.org> References: <1445355225-17557-1-git-send-email-joro@8bytes.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joerg Roedel The driver always uses a constant size for these buffers anyway, so there is no need to waste memory to store the sizes. Signed-off-by: Joerg Roedel --- drivers/iommu/amd_iommu.c | 10 ++++------ drivers/iommu/amd_iommu_init.c | 8 +------- drivers/iommu/amd_iommu_types.h | 4 ---- 3 files changed, 5 insertions(+), 17 deletions(-) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 1a7c78d..8886488 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -534,7 +534,7 @@ static void iommu_poll_events(struct amd_iommu *iommu) while (head != tail) { iommu_print_event(iommu, iommu->evt_buf + head); - head = (head + EVENT_ENTRY_SIZE) % iommu->evt_buf_size; + head = (head + EVENT_ENTRY_SIZE) % EVT_BUFFER_SIZE; } writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); @@ -684,7 +684,7 @@ static void copy_cmd_to_buffer(struct amd_iommu *iommu, u8 *target; target = iommu->cmd_buf + tail; - tail = (tail + sizeof(*cmd)) % iommu->cmd_buf_size; + tail = (tail + sizeof(*cmd)) % CMD_BUFFER_SIZE; /* Copy command to buffer */ memcpy(target, cmd, sizeof(*cmd)); @@ -851,15 +851,13 @@ static int iommu_queue_command_sync(struct amd_iommu *iommu, u32 left, tail, head, next_tail; unsigned long flags; - WARN_ON(iommu->cmd_buf_size & CMD_BUFFER_UNINITIALIZED); - again: spin_lock_irqsave(&iommu->lock, flags); head = readl(iommu->mmio_base + MMIO_CMD_HEAD_OFFSET); tail = readl(iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); - next_tail = (tail + sizeof(*cmd)) % iommu->cmd_buf_size; - left = (head - next_tail) % iommu->cmd_buf_size; + next_tail = (tail + sizeof(*cmd)) % CMD_BUFFER_SIZE; + left = (head - next_tail) % CMD_BUFFER_SIZE; if (left <= 2) { struct iommu_cmd sync_cmd; diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 1b066e7..930a5d4 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -521,8 +521,6 @@ static u8 * __init alloc_command_buffer(struct amd_iommu *iommu) if (cmd_buf == NULL) return NULL; - iommu->cmd_buf_size = CMD_BUFFER_SIZE | CMD_BUFFER_UNINITIALIZED; - return cmd_buf; } @@ -557,13 +555,11 @@ static void iommu_enable_command_buffer(struct amd_iommu *iommu) &entry, sizeof(entry)); amd_iommu_reset_cmd_buffer(iommu); - iommu->cmd_buf_size &= ~(CMD_BUFFER_UNINITIALIZED); } static void __init free_command_buffer(struct amd_iommu *iommu) { - free_pages((unsigned long)iommu->cmd_buf, - get_order(iommu->cmd_buf_size & ~(CMD_BUFFER_UNINITIALIZED))); + free_pages((unsigned long)iommu->cmd_buf, get_order(CMD_BUFFER_SIZE)); } /* allocates the memory where the IOMMU will log its events to */ @@ -575,8 +571,6 @@ static u8 * __init alloc_event_buffer(struct amd_iommu *iommu) if (iommu->evt_buf == NULL) return NULL; - iommu->evt_buf_size = EVT_BUFFER_SIZE; - return iommu->evt_buf; } diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h index 3026b34..921b2e9 100644 --- a/drivers/iommu/amd_iommu_types.h +++ b/drivers/iommu/amd_iommu_types.h @@ -528,11 +528,7 @@ struct amd_iommu { /* command buffer virtual address */ u8 *cmd_buf; - /* size of command buffer */ - u32 cmd_buf_size; - /* size of event buffer */ - u32 evt_buf_size; /* event buffer virtual address */ u8 *evt_buf; -- 1.9.1